diff --git a/blockly_accessible_compressed.js b/blockly_accessible_compressed.js
index d0d753591..4ac170080 100644
--- a/blockly_accessible_compressed.js
+++ b/blockly_accessible_compressed.js
@@ -5,7 +5,7 @@ var $jscomp=$jscomp||{};$jscomp.scope={};var COMPILED=!0,goog=goog||{};goog.glob
 goog.exportPath_=function(a,b,c){a=a.split(".");c=c||goog.global;a[0]in c||"undefined"==typeof c.execScript||c.execScript("var "+a[0]);for(var d;a.length&&(d=a.shift());)!a.length&&goog.isDef(b)?c[d]=b:c=c[d]&&c[d]!==Object.prototype[d]?c[d]:c[d]={}};
 goog.define=function(a,b){if(!COMPILED){var c=goog.global.CLOSURE_UNCOMPILED_DEFINES,d=goog.global.CLOSURE_DEFINES;c&&void 0===c.nodeType&&Object.prototype.hasOwnProperty.call(c,a)?b=c[a]:d&&void 0===d.nodeType&&Object.prototype.hasOwnProperty.call(d,a)&&(b=d[a])}goog.exportPath_(a,b)};goog.DEBUG=!1;goog.LOCALE="en";goog.TRUSTED_SITE=!0;goog.STRICT_MODE_COMPATIBLE=!1;goog.DISALLOW_TEST_ONLY_CODE=COMPILED&&!goog.DEBUG;goog.ENABLE_CHROME_APP_SAFE_SCRIPT_LOADING=!1;
 goog.provide=function(a){if(goog.isInModuleLoader_())throw Error("goog.provide cannot be used within a module.");if(!COMPILED&&goog.isProvided_(a))throw Error('Namespace "'+a+'" already declared.');goog.constructNamespace_(a)};goog.constructNamespace_=function(a,b){if(!COMPILED){delete goog.implicitNamespaces_[a];for(var c=a;(c=c.substring(0,c.lastIndexOf(".")))&&!goog.getObjectByName(c);)goog.implicitNamespaces_[c]=!0}goog.exportPath_(a,b)};
-goog.getScriptNonce=function(){null===goog.cspNonce_&&(goog.cspNonce_=goog.getScriptNonce_(goog.global.document)||"");return goog.cspNonce_};goog.NONCE_PATTERN_=/^[\w+/_-]+[=]{0,2}$/;goog.cspNonce_=null;goog.getScriptNonce_=function(a){return(a=a.querySelector&&a.querySelector("script[nonce]"))&&(a=a.nonce||a.getAttribute("nonce"))&&goog.NONCE_PATTERN_.test(a)?a:null};goog.VALID_MODULE_RE_=/^[a-zA-Z_$][a-zA-Z0-9._$]*$/;
+goog.getScriptNonce=function(a){if(a&&a!=goog.global)return goog.getScriptNonce_(a.document);null===goog.cspNonce_&&(goog.cspNonce_=goog.getScriptNonce_(goog.global.document));return goog.cspNonce_};goog.NONCE_PATTERN_=/^[\w+/_-]+[=]{0,2}$/;goog.cspNonce_=null;goog.getScriptNonce_=function(a){return(a=a.querySelector&&a.querySelector("script[nonce]"))&&(a=a.nonce||a.getAttribute("nonce"))&&goog.NONCE_PATTERN_.test(a)?a:""};goog.VALID_MODULE_RE_=/^[a-zA-Z_$][a-zA-Z0-9._$]*$/;
 goog.module=function(a){if(!goog.isString(a)||!a||-1==a.search(goog.VALID_MODULE_RE_))throw Error("Invalid module identifier");if(!goog.isInGoogModuleLoader_())throw Error("Module "+a+" has been loaded incorrectly. Note, modules cannot be loaded as normal scripts. They require some kind of pre-processing step. You're likely trying to load a module via a script tag or as a part of a concatenated bundle without rewriting the module. For more info see: https://github.com/google/closure-library/wiki/goog.module:-an-ES6-module-like-alternative-to-goog.provide.");
 if(goog.moduleLoaderState_.moduleName)throw Error("goog.module may only be called once per module.");goog.moduleLoaderState_.moduleName=a;if(!COMPILED){if(goog.isProvided_(a))throw Error('Namespace "'+a+'" already declared.');delete goog.implicitNamespaces_[a]}};goog.module.get=function(a){return goog.module.getInternal_(a)};
 goog.module.getInternal_=function(a){if(!COMPILED){if(a in goog.loadedModules_)return goog.loadedModules_[a].exports;if(!goog.implicitNamespaces_[a])return a=goog.getObjectByName(a),null!=a?a:null}return null};goog.ModuleType={ES6:"es6",GOOG:"goog"};goog.moduleLoaderState_=null;goog.isInModuleLoader_=function(){return goog.isInGoogModuleLoader_()||goog.isInEs6ModuleLoader_()};goog.isInGoogModuleLoader_=function(){return!!goog.moduleLoaderState_&&goog.moduleLoaderState_.type==goog.ModuleType.GOOG};
@@ -129,8 +129,8 @@ goog.color.prependZeroIfNecessaryHelper=function(a){return 1==a.length?"0"+a:a};
 goog.color.hsvToRgb=function(a,b,c){var d=0,e=0,f=0;if(0==b)f=e=d=c;else{var g=Math.floor(a/60),h=a/60-g;a=c*(1-b);var k=c*(1-b*h);b=c*(1-b*(1-h));switch(g){case 1:d=k;e=c;f=a;break;case 2:d=a;e=c;f=b;break;case 3:d=a;e=k;f=c;break;case 4:d=b;e=a;f=c;break;case 5:d=c;e=a;f=k;break;case 6:case 0:d=c,e=b,f=a}}return[Math.floor(d),Math.floor(e),Math.floor(f)]};
 goog.color.rgbToHsv=function(a,b,c){var d=Math.max(Math.max(a,b),c),e=Math.min(Math.min(a,b),c);if(e==d)e=a=0;else{var f=d-e;e=f/d;a=60*(a==d?(b-c)/f:b==d?2+(c-a)/f:4+(a-b)/f);0>a&&(a+=360);360<a&&(a-=360)}return[a,e,d]};goog.color.rgbArrayToHsv=function(a){return goog.color.rgbToHsv(a[0],a[1],a[2])};goog.color.hsvArrayToRgb=function(a){return goog.color.hsvToRgb(a[0],a[1],a[2])};goog.color.hexToHsl=function(a){a=goog.color.hexToRgb(a);return goog.color.rgbToHsl(a[0],a[1],a[2])};
 goog.color.hslToHex=function(a,b,c){return goog.color.rgbArrayToHex(goog.color.hslToRgb(a,b,c))};goog.color.hslArrayToHex=function(a){return goog.color.rgbArrayToHex(goog.color.hslToRgb(a[0],a[1],a[2]))};goog.color.hexToHsv=function(a){return goog.color.rgbArrayToHsv(goog.color.hexToRgb(a))};goog.color.hsvToHex=function(a,b,c){return goog.color.rgbArrayToHex(goog.color.hsvToRgb(a,b,c))};goog.color.hsvArrayToHex=function(a){return goog.color.hsvToHex(a[0],a[1],a[2])};
-goog.color.hslDistance=function(a,b){var c=.5>=a[2]?a[1]*a[2]:a[1]*(1-a[2]);var d=.5>=b[2]?b[1]*b[2]:b[1]*(1-b[2]);return(a[2]-b[2])*(a[2]-b[2])+c*c+d*d-2*c*d*Math.cos(2*(a[0]/360-b[0]/360)*Math.PI)};goog.color.blend=function(a,b,c){c=goog.math.clamp(c,0,1);return[Math.round(c*a[0]+(1-c)*b[0]),Math.round(c*a[1]+(1-c)*b[1]),Math.round(c*a[2]+(1-c)*b[2])]};goog.color.darken=function(a,b){return goog.color.blend([0,0,0],a,b)};goog.color.lighten=function(a,b){return goog.color.blend([255,255,255],a,b)};
-goog.color.highContrast=function(a,b){for(var c=[],d=0;d<b.length;d++)c.push({color:b[d],diff:goog.color.yiqBrightnessDiff_(b[d],a)+goog.color.colorDiff_(b[d],a)});c.sort(function(a,b){return b.diff-a.diff});return c[0].color};goog.color.yiqBrightness_=function(a){return Math.round((299*a[0]+587*a[1]+114*a[2])/1E3)};goog.color.yiqBrightnessDiff_=function(a,b){return Math.abs(goog.color.yiqBrightness_(a)-goog.color.yiqBrightness_(b))};
+goog.color.hslDistance=function(a,b){var c=.5>=a[2]?a[1]*a[2]:a[1]*(1-a[2]);var d=.5>=b[2]?b[1]*b[2]:b[1]*(1-b[2]);return(a[2]-b[2])*(a[2]-b[2])+c*c+d*d-2*c*d*Math.cos(2*(a[0]/360-b[0]/360)*Math.PI)};goog.color.blend=function(a,b,c){c=goog.math.clamp(c,0,1);return[Math.round(b[0]+c*(a[0]-b[0])),Math.round(b[1]+c*(a[1]-b[1])),Math.round(b[2]+c*(a[2]-b[2]))]};goog.color.darken=function(a,b){return goog.color.blend([0,0,0],a,b)};
+goog.color.lighten=function(a,b){return goog.color.blend([255,255,255],a,b)};goog.color.highContrast=function(a,b){for(var c=[],d=0;d<b.length;d++)c.push({color:b[d],diff:goog.color.yiqBrightnessDiff_(b[d],a)+goog.color.colorDiff_(b[d],a)});c.sort(function(a,b){return b.diff-a.diff});return c[0].color};goog.color.yiqBrightness_=function(a){return Math.round((299*a[0]+587*a[1]+114*a[2])/1E3)};goog.color.yiqBrightnessDiff_=function(a,b){return Math.abs(goog.color.yiqBrightness_(a)-goog.color.yiqBrightness_(b))};
 goog.color.colorDiff_=function(a,b){return Math.abs(a[0]-b[0])+Math.abs(a[1]-b[1])+Math.abs(a[2]-b[2])};goog.string={};goog.string.DETECT_DOUBLE_ESCAPING=!1;goog.string.FORCE_NON_DOM_HTML_UNESCAPING=!1;goog.string.Unicode={NBSP:"\u00a0"};goog.string.startsWith=function(a,b){return 0==a.lastIndexOf(b,0)};goog.string.endsWith=function(a,b){var c=a.length-b.length;return 0<=c&&a.indexOf(b,c)==c};goog.string.caseInsensitiveStartsWith=function(a,b){return 0==goog.string.caseInsensitiveCompare(b,a.substr(0,b.length))};
 goog.string.caseInsensitiveEndsWith=function(a,b){return 0==goog.string.caseInsensitiveCompare(b,a.substr(a.length-b.length,b.length))};goog.string.caseInsensitiveEquals=function(a,b){return a.toLowerCase()==b.toLowerCase()};goog.string.subs=function(a,b){for(var c=a.split("%s"),d="",e=Array.prototype.slice.call(arguments,1);e.length&&1<c.length;)d+=c.shift()+e.shift();return d+c.join("%s")};goog.string.collapseWhitespace=function(a){return a.replace(/[\s\xa0]+/g," ").replace(/^\s+|\s+$/g,"")};
 goog.string.isEmptyOrWhitespace=function(a){return/^[\s\xa0]*$/.test(a)};goog.string.isEmptyString=function(a){return 0==a.length};goog.string.isEmpty=goog.string.isEmptyOrWhitespace;goog.string.isEmptyOrWhitespaceSafe=function(a){return goog.string.isEmptyOrWhitespace(goog.string.makeSafe(a))};goog.string.isEmptySafe=goog.string.isEmptyOrWhitespaceSafe;goog.string.isBreakingWhitespace=function(a){return!/[^\t\n\r ]/.test(a)};goog.string.isAlpha=function(a){return!/[^a-zA-Z]/.test(a)};
@@ -233,11 +233,11 @@ goog.events.EventType.MSPOINTERENTER,goog.events.EventType.MOUSEENTER),POINTERLE
 goog.events.PointerTouchFallbackEventType={POINTERDOWN:goog.events.getPointerFallbackEventName_(goog.events.EventType.POINTERDOWN,goog.events.EventType.MSPOINTERDOWN,goog.events.EventType.TOUCHSTART),POINTERUP:goog.events.getPointerFallbackEventName_(goog.events.EventType.POINTERUP,goog.events.EventType.MSPOINTERUP,goog.events.EventType.TOUCHEND),POINTERCANCEL:goog.events.getPointerFallbackEventName_(goog.events.EventType.POINTERCANCEL,goog.events.EventType.MSPOINTERCANCEL,goog.events.EventType.TOUCHCANCEL),
 POINTERMOVE:goog.events.getPointerFallbackEventName_(goog.events.EventType.POINTERMOVE,goog.events.EventType.MSPOINTERMOVE,goog.events.EventType.TOUCHMOVE)};
 goog.events.PointerAsMouseEventType={MOUSEDOWN:goog.events.PointerFallbackEventType.POINTERDOWN,MOUSEUP:goog.events.PointerFallbackEventType.POINTERUP,MOUSECANCEL:goog.events.PointerFallbackEventType.POINTERCANCEL,MOUSEMOVE:goog.events.PointerFallbackEventType.POINTERMOVE,MOUSEOVER:goog.events.PointerFallbackEventType.POINTEROVER,MOUSEOUT:goog.events.PointerFallbackEventType.POINTEROUT,MOUSEENTER:goog.events.PointerFallbackEventType.POINTERENTER,MOUSELEAVE:goog.events.PointerFallbackEventType.POINTERLEAVE};
-goog.events.PointerAsTouchEventType={TOUCHCANCEL:goog.events.PointerTouchFallbackEventType.POINTERCANCEL,TOUCHEND:goog.events.PointerTouchFallbackEventType.POINTERUP,TOUCHMOVE:goog.events.PointerTouchFallbackEventType.POINTERMOVE,TOUCHSTART:goog.events.PointerTouchFallbackEventType.POINTERDOWN};goog.events.BrowserEvent=function(a,b){goog.events.Event.call(this,a?a.type:"");this.relatedTarget=this.currentTarget=this.target=null;this.button=this.screenY=this.screenX=this.clientY=this.clientX=this.offsetY=this.offsetX=0;this.key="";this.charCode=this.keyCode=0;this.metaKey=this.shiftKey=this.altKey=this.ctrlKey=!1;this.state=null;this.platformModifierKey=!1;this.pointerId=0;this.pointerType="";this.event_=null;a&&this.init(a,b)};goog.inherits(goog.events.BrowserEvent,goog.events.Event);
-goog.events.BrowserEvent.MouseButton={LEFT:0,MIDDLE:1,RIGHT:2};goog.events.BrowserEvent.PointerType={MOUSE:"mouse",PEN:"pen",TOUCH:"touch"};goog.events.BrowserEvent.IEButtonMap=goog.debug.freeze([1,4,2]);goog.events.BrowserEvent.IE_BUTTON_MAP=goog.events.BrowserEvent.IEButtonMap;goog.events.BrowserEvent.IE_POINTER_TYPE_MAP=goog.debug.freeze({2:goog.events.BrowserEvent.PointerType.TOUCH,3:goog.events.BrowserEvent.PointerType.PEN,4:goog.events.BrowserEvent.PointerType.MOUSE});
-goog.events.BrowserEvent.prototype.init=function(a,b){var c=this.type=a.type,d=a.changedTouches?a.changedTouches[0]:null;this.target=a.target||a.srcElement;this.currentTarget=b;(b=a.relatedTarget)?goog.userAgent.GECKO&&(goog.reflect.canAccessProperty(b,"nodeName")||(b=null)):c==goog.events.EventType.MOUSEOVER?b=a.fromElement:c==goog.events.EventType.MOUSEOUT&&(b=a.toElement);this.relatedTarget=b;goog.isNull(d)?(this.offsetX=goog.userAgent.WEBKIT||void 0!==a.offsetX?a.offsetX:a.layerX,this.offsetY=
-goog.userAgent.WEBKIT||void 0!==a.offsetY?a.offsetY:a.layerY,this.clientX=void 0!==a.clientX?a.clientX:a.pageX,this.clientY=void 0!==a.clientY?a.clientY:a.pageY,this.screenX=a.screenX||0,this.screenY=a.screenY||0):(this.clientX=void 0!==d.clientX?d.clientX:d.pageX,this.clientY=void 0!==d.clientY?d.clientY:d.pageY,this.screenX=d.screenX||0,this.screenY=d.screenY||0);this.button=a.button;this.keyCode=a.keyCode||0;this.key=a.key||"";this.charCode=a.charCode||("keypress"==c?a.keyCode:0);this.ctrlKey=
-a.ctrlKey;this.altKey=a.altKey;this.shiftKey=a.shiftKey;this.metaKey=a.metaKey;this.platformModifierKey=goog.userAgent.MAC?a.metaKey:a.ctrlKey;this.pointerId=a.pointerId||0;this.pointerType=goog.events.BrowserEvent.getPointerType_(a);this.state=a.state;this.event_=a;a.defaultPrevented&&this.preventDefault()};
+goog.events.PointerAsTouchEventType={TOUCHCANCEL:goog.events.PointerTouchFallbackEventType.POINTERCANCEL,TOUCHEND:goog.events.PointerTouchFallbackEventType.POINTERUP,TOUCHMOVE:goog.events.PointerTouchFallbackEventType.POINTERMOVE,TOUCHSTART:goog.events.PointerTouchFallbackEventType.POINTERDOWN};goog.events.USE_LAYER_XY_AS_OFFSET_XY=!1;goog.events.BrowserEvent=function(a,b){goog.events.Event.call(this,a?a.type:"");this.relatedTarget=this.currentTarget=this.target=null;this.button=this.screenY=this.screenX=this.clientY=this.clientX=this.offsetY=this.offsetX=0;this.key="";this.charCode=this.keyCode=0;this.metaKey=this.shiftKey=this.altKey=this.ctrlKey=!1;this.state=null;this.platformModifierKey=!1;this.pointerId=0;this.pointerType="";this.event_=null;a&&this.init(a,b)};
+goog.inherits(goog.events.BrowserEvent,goog.events.Event);goog.events.BrowserEvent.MouseButton={LEFT:0,MIDDLE:1,RIGHT:2};goog.events.BrowserEvent.PointerType={MOUSE:"mouse",PEN:"pen",TOUCH:"touch"};goog.events.BrowserEvent.IEButtonMap=goog.debug.freeze([1,4,2]);goog.events.BrowserEvent.IE_BUTTON_MAP=goog.events.BrowserEvent.IEButtonMap;goog.events.BrowserEvent.IE_POINTER_TYPE_MAP=goog.debug.freeze({2:goog.events.BrowserEvent.PointerType.TOUCH,3:goog.events.BrowserEvent.PointerType.PEN,4:goog.events.BrowserEvent.PointerType.MOUSE});
+goog.events.BrowserEvent.prototype.init=function(a,b){var c=this.type=a.type,d=a.changedTouches&&a.changedTouches.length?a.changedTouches[0]:null;this.target=a.target||a.srcElement;this.currentTarget=b;(b=a.relatedTarget)?goog.userAgent.GECKO&&(goog.reflect.canAccessProperty(b,"nodeName")||(b=null)):c==goog.events.EventType.MOUSEOVER?b=a.fromElement:c==goog.events.EventType.MOUSEOUT&&(b=a.toElement);this.relatedTarget=b;d?(this.clientX=void 0!==d.clientX?d.clientX:d.pageX,this.clientY=void 0!==d.clientY?
+d.clientY:d.pageY,this.screenX=d.screenX||0,this.screenY=d.screenY||0):(goog.events.USE_LAYER_XY_AS_OFFSET_XY?(this.offsetX=void 0!==a.layerX?a.layerX:a.offsetX,this.offsetY=void 0!==a.layerY?a.layerY:a.offsetY):(this.offsetX=goog.userAgent.WEBKIT||void 0!==a.offsetX?a.offsetX:a.layerX,this.offsetY=goog.userAgent.WEBKIT||void 0!==a.offsetY?a.offsetY:a.layerY),this.clientX=void 0!==a.clientX?a.clientX:a.pageX,this.clientY=void 0!==a.clientY?a.clientY:a.pageY,this.screenX=a.screenX||0,this.screenY=
+a.screenY||0);this.button=a.button;this.keyCode=a.keyCode||0;this.key=a.key||"";this.charCode=a.charCode||("keypress"==c?a.keyCode:0);this.ctrlKey=a.ctrlKey;this.altKey=a.altKey;this.shiftKey=a.shiftKey;this.metaKey=a.metaKey;this.platformModifierKey=goog.userAgent.MAC?a.metaKey:a.ctrlKey;this.pointerId=a.pointerId||0;this.pointerType=goog.events.BrowserEvent.getPointerType_(a);this.state=a.state;this.event_=a;a.defaultPrevented&&this.preventDefault()};
 goog.events.BrowserEvent.prototype.isButton=function(a){return goog.events.BrowserFeature.HAS_W3C_BUTTON?this.event_.button==a:"click"==this.type?a==goog.events.BrowserEvent.MouseButton.LEFT:!!(this.event_.button&goog.events.BrowserEvent.IE_BUTTON_MAP[a])};goog.events.BrowserEvent.prototype.isMouseActionButton=function(){return this.isButton(goog.events.BrowserEvent.MouseButton.LEFT)&&!(goog.userAgent.WEBKIT&&goog.userAgent.MAC&&this.ctrlKey)};
 goog.events.BrowserEvent.prototype.stopPropagation=function(){goog.events.BrowserEvent.superClass_.stopPropagation.call(this);this.event_.stopPropagation?this.event_.stopPropagation():this.event_.cancelBubble=!0};
 goog.events.BrowserEvent.prototype.preventDefault=function(){goog.events.BrowserEvent.superClass_.preventDefault.call(this);var a=this.event_;if(a.preventDefault)a.preventDefault();else if(a.returnValue=!1,goog.events.BrowserFeature.SET_KEY_CODE_TO_PREVENT_DEFAULT)try{if(a.ctrlKey||112<=a.keyCode&&123>=a.keyCode)a.keyCode=-1}catch(b){}};goog.events.BrowserEvent.prototype.getBrowserEvent=function(){return this.event_};
@@ -290,13 +290,14 @@ goog.functions.create=function(a,b){var c=function(){};c.prototype=a.prototype;c
 goog.functions.debounce=function(a,b,c){var d=0;return function(e){goog.global.clearTimeout(d);var f=arguments;d=goog.global.setTimeout(function(){a.apply(c,f)},b)}};goog.functions.throttle=function(a,b,c){var d=0,e=!1,f=[],g=function(){d=0;e&&(e=!1,h())},h=function(){d=goog.global.setTimeout(g,b);a.apply(c,f)};return function(a){f=arguments;d?e=!0:h()}};goog.functions.rateLimit=function(a,b,c){var d=0,e=function(){d=0};return function(f){d||(d=goog.global.setTimeout(e,b),a.apply(c,arguments))}};goog.dom.tags={};goog.dom.tags.VOID_TAGS_={area:!0,base:!0,br:!0,col:!0,command:!0,embed:!0,hr:!0,img:!0,input:!0,keygen:!0,link:!0,meta:!0,param:!0,source:!0,track:!0,wbr:!0};goog.dom.tags.isVoidTag=function(a){return!0===goog.dom.tags.VOID_TAGS_[a]};goog.string.TypedString=function(){};goog.string.Const=function(a,b){this.stringConstValueWithSecurityContract__googStringSecurityPrivate_=a===goog.string.Const.GOOG_STRING_CONSTRUCTOR_TOKEN_PRIVATE_&&b||"";this.STRING_CONST_TYPE_MARKER__GOOG_STRING_SECURITY_PRIVATE_=goog.string.Const.TYPE_MARKER_};goog.string.Const.prototype.implementsGoogStringTypedString=!0;goog.string.Const.prototype.getTypedStringValue=function(){return this.stringConstValueWithSecurityContract__googStringSecurityPrivate_};
 goog.string.Const.prototype.toString=function(){return"Const{"+this.stringConstValueWithSecurityContract__googStringSecurityPrivate_+"}"};goog.string.Const.unwrap=function(a){if(a instanceof goog.string.Const&&a.constructor===goog.string.Const&&a.STRING_CONST_TYPE_MARKER__GOOG_STRING_SECURITY_PRIVATE_===goog.string.Const.TYPE_MARKER_)return a.stringConstValueWithSecurityContract__googStringSecurityPrivate_;goog.asserts.fail("expected object of type Const, got '"+a+"'");return"type_error:Const"};
 goog.string.Const.from=function(a){return new goog.string.Const(goog.string.Const.GOOG_STRING_CONSTRUCTOR_TOKEN_PRIVATE_,a)};goog.string.Const.TYPE_MARKER_={};goog.string.Const.GOOG_STRING_CONSTRUCTOR_TOKEN_PRIVATE_={};goog.string.Const.EMPTY=goog.string.Const.from("");goog.html={};goog.html.SafeScript=function(){this.privateDoNotAccessOrElseSafeScriptWrappedValue_="";this.SAFE_SCRIPT_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_=goog.html.SafeScript.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_};goog.html.SafeScript.prototype.implementsGoogStringTypedString=!0;goog.html.SafeScript.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_={};goog.html.SafeScript.fromConstant=function(a){a=goog.string.Const.unwrap(a);return 0===a.length?goog.html.SafeScript.EMPTY:goog.html.SafeScript.createSafeScriptSecurityPrivateDoNotAccessOrElse(a)};
-goog.html.SafeScript.fromConstantAndArgs=function(a,b){for(var c=[],d=1;d<arguments.length;d++)c.push(goog.html.SafeScript.stringify_(arguments[d]));return goog.html.SafeScript.createSafeScriptSecurityPrivateDoNotAccessOrElse("("+goog.string.Const.unwrap(a)+")("+c.join(", ")+");")};goog.html.SafeScript.prototype.getTypedStringValue=function(){return this.privateDoNotAccessOrElseSafeScriptWrappedValue_};
+goog.html.SafeScript.fromConstantAndArgs=function(a,b){for(var c=[],d=1;d<arguments.length;d++)c.push(goog.html.SafeScript.stringify_(arguments[d]));return goog.html.SafeScript.createSafeScriptSecurityPrivateDoNotAccessOrElse("("+goog.string.Const.unwrap(a)+")("+c.join(", ")+");")};goog.html.SafeScript.fromJson=function(a){return goog.html.SafeScript.createSafeScriptSecurityPrivateDoNotAccessOrElse(goog.html.SafeScript.stringify_(a))};goog.html.SafeScript.prototype.getTypedStringValue=function(){return this.privateDoNotAccessOrElseSafeScriptWrappedValue_};
 goog.DEBUG&&(goog.html.SafeScript.prototype.toString=function(){return"SafeScript{"+this.privateDoNotAccessOrElseSafeScriptWrappedValue_+"}"});
 goog.html.SafeScript.unwrap=function(a){if(a instanceof goog.html.SafeScript&&a.constructor===goog.html.SafeScript&&a.SAFE_SCRIPT_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_===goog.html.SafeScript.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_)return a.privateDoNotAccessOrElseSafeScriptWrappedValue_;goog.asserts.fail("expected object of type SafeScript, got '"+a+"' of type "+goog.typeOf(a));return"type_error:SafeScript"};goog.html.SafeScript.stringify_=function(a){return JSON.stringify(a).replace(/</g,"\\x3c")};
 goog.html.SafeScript.createSafeScriptSecurityPrivateDoNotAccessOrElse=function(a){return(new goog.html.SafeScript).initSecurityPrivateDoNotAccessOrElse_(a)};goog.html.SafeScript.prototype.initSecurityPrivateDoNotAccessOrElse_=function(a){this.privateDoNotAccessOrElseSafeScriptWrappedValue_=a;return this};goog.html.SafeScript.EMPTY=goog.html.SafeScript.createSafeScriptSecurityPrivateDoNotAccessOrElse("");goog.fs={};goog.fs.url={};goog.fs.url.createObjectUrl=function(a){return goog.fs.url.getUrlObject_().createObjectURL(a)};goog.fs.url.revokeObjectUrl=function(a){goog.fs.url.getUrlObject_().revokeObjectURL(a)};goog.fs.url.getUrlObject_=function(){var a=goog.fs.url.findUrlObject_();if(null!=a)return a;throw Error("This browser doesn't seem to support blob URLs");};
 goog.fs.url.findUrlObject_=function(){return goog.isDef(goog.global.URL)&&goog.isDef(goog.global.URL.createObjectURL)?goog.global.URL:goog.isDef(goog.global.webkitURL)&&goog.isDef(goog.global.webkitURL.createObjectURL)?goog.global.webkitURL:goog.isDef(goog.global.createObjectURL)?goog.global:null};goog.fs.url.browserSupportsObjectUrls=function(){return null!=goog.fs.url.findUrlObject_()};goog.i18n={};goog.i18n.bidi={};goog.i18n.bidi.FORCE_RTL=!1;
 goog.i18n.bidi.IS_RTL=goog.i18n.bidi.FORCE_RTL||("ar"==goog.LOCALE.substring(0,2).toLowerCase()||"fa"==goog.LOCALE.substring(0,2).toLowerCase()||"he"==goog.LOCALE.substring(0,2).toLowerCase()||"iw"==goog.LOCALE.substring(0,2).toLowerCase()||"ps"==goog.LOCALE.substring(0,2).toLowerCase()||"sd"==goog.LOCALE.substring(0,2).toLowerCase()||"ug"==goog.LOCALE.substring(0,2).toLowerCase()||"ur"==goog.LOCALE.substring(0,2).toLowerCase()||"yi"==goog.LOCALE.substring(0,2).toLowerCase())&&(2==goog.LOCALE.length||
-"-"==goog.LOCALE.substring(2,3)||"_"==goog.LOCALE.substring(2,3))||3<=goog.LOCALE.length&&"ckb"==goog.LOCALE.substring(0,3).toLowerCase()&&(3==goog.LOCALE.length||"-"==goog.LOCALE.substring(3,4)||"_"==goog.LOCALE.substring(3,4))||7<=goog.LOCALE.length&&"ff"==goog.LOCALE.substring(0,2).toLowerCase()&&("-"==goog.LOCALE.substring(2,3)||"_"==goog.LOCALE.substring(2,3))&&("adlm"==goog.LOCALE.substring(3,7).toLowerCase()||"arab"==goog.LOCALE.substring(3,7).toLowerCase());
+"-"==goog.LOCALE.substring(2,3)||"_"==goog.LOCALE.substring(2,3))||3<=goog.LOCALE.length&&"ckb"==goog.LOCALE.substring(0,3).toLowerCase()&&(3==goog.LOCALE.length||"-"==goog.LOCALE.substring(3,4)||"_"==goog.LOCALE.substring(3,4))||7<=goog.LOCALE.length&&("-"==goog.LOCALE.substring(2,3)||"_"==goog.LOCALE.substring(2,3))&&("adlm"==goog.LOCALE.substring(3,7).toLowerCase()||"arab"==goog.LOCALE.substring(3,7).toLowerCase()||"hebr"==goog.LOCALE.substring(3,7).toLowerCase()||"nkoo"==goog.LOCALE.substring(3,
+7).toLowerCase()||"rohg"==goog.LOCALE.substring(3,7).toLowerCase()||"thaa"==goog.LOCALE.substring(3,7).toLowerCase())||8<=goog.LOCALE.length&&("-"==goog.LOCALE.substring(3,4)||"_"==goog.LOCALE.substring(3,4))&&("adlm"==goog.LOCALE.substring(4,8).toLowerCase()||"arab"==goog.LOCALE.substring(4,8).toLowerCase()||"hebr"==goog.LOCALE.substring(4,8).toLowerCase()||"nkoo"==goog.LOCALE.substring(4,8).toLowerCase()||"rohg"==goog.LOCALE.substring(4,8).toLowerCase()||"thaa"==goog.LOCALE.substring(4,8).toLowerCase());
 goog.i18n.bidi.Format={LRE:"\u202a",RLE:"\u202b",PDF:"\u202c",LRM:"\u200e",RLM:"\u200f"};goog.i18n.bidi.Dir={LTR:1,RTL:-1,NEUTRAL:0};goog.i18n.bidi.RIGHT="right";goog.i18n.bidi.LEFT="left";goog.i18n.bidi.I18N_RIGHT=goog.i18n.bidi.IS_RTL?goog.i18n.bidi.LEFT:goog.i18n.bidi.RIGHT;goog.i18n.bidi.I18N_LEFT=goog.i18n.bidi.IS_RTL?goog.i18n.bidi.RIGHT:goog.i18n.bidi.LEFT;
 goog.i18n.bidi.toDir=function(a,b){return"number"==typeof a?0<a?goog.i18n.bidi.Dir.LTR:0>a?goog.i18n.bidi.Dir.RTL:b?null:goog.i18n.bidi.Dir.NEUTRAL:null==a?null:a?goog.i18n.bidi.Dir.RTL:goog.i18n.bidi.Dir.LTR};goog.i18n.bidi.ltrChars_="A-Za-z\u00c0-\u00d6\u00d8-\u00f6\u00f8-\u02b8\u0300-\u0590\u0900-\u1fff\u200e\u2c00-\ud801\ud804-\ud839\ud83c-\udbff\uf900-\ufb1c\ufe00-\ufe6f\ufefd-\uffff";goog.i18n.bidi.rtlChars_="\u0591-\u06ef\u06fa-\u08ff\u200f\ud802-\ud803\ud83a-\ud83b\ufb1d-\ufdff\ufe70-\ufefc";
 goog.i18n.bidi.htmlSkipReg_=/<[^>]*>|&[^;]+;/g;goog.i18n.bidi.stripHtmlIfNeeded_=function(a,b){return b?a.replace(goog.i18n.bidi.htmlSkipReg_,""):a};goog.i18n.bidi.rtlCharReg_=new RegExp("["+goog.i18n.bidi.rtlChars_+"]");goog.i18n.bidi.ltrCharReg_=new RegExp("["+goog.i18n.bidi.ltrChars_+"]");goog.i18n.bidi.hasAnyRtl=function(a,b){return goog.i18n.bidi.rtlCharReg_.test(goog.i18n.bidi.stripHtmlIfNeeded_(a,b))};goog.i18n.bidi.hasRtlChar=goog.i18n.bidi.hasAnyRtl;
@@ -304,7 +305,7 @@ goog.i18n.bidi.hasAnyLtr=function(a,b){return goog.i18n.bidi.ltrCharReg_.test(go
 goog.i18n.bidi.ltrDirCheckRe_=new RegExp("^[^"+goog.i18n.bidi.rtlChars_+"]*["+goog.i18n.bidi.ltrChars_+"]");goog.i18n.bidi.rtlDirCheckRe_=new RegExp("^[^"+goog.i18n.bidi.ltrChars_+"]*["+goog.i18n.bidi.rtlChars_+"]");goog.i18n.bidi.startsWithRtl=function(a,b){return goog.i18n.bidi.rtlDirCheckRe_.test(goog.i18n.bidi.stripHtmlIfNeeded_(a,b))};goog.i18n.bidi.isRtlText=goog.i18n.bidi.startsWithRtl;
 goog.i18n.bidi.startsWithLtr=function(a,b){return goog.i18n.bidi.ltrDirCheckRe_.test(goog.i18n.bidi.stripHtmlIfNeeded_(a,b))};goog.i18n.bidi.isLtrText=goog.i18n.bidi.startsWithLtr;goog.i18n.bidi.isRequiredLtrRe_=/^http:\/\/.*/;goog.i18n.bidi.isNeutralText=function(a,b){a=goog.i18n.bidi.stripHtmlIfNeeded_(a,b);return goog.i18n.bidi.isRequiredLtrRe_.test(a)||!goog.i18n.bidi.hasAnyLtr(a)&&!goog.i18n.bidi.hasAnyRtl(a)};
 goog.i18n.bidi.ltrExitDirCheckRe_=new RegExp("["+goog.i18n.bidi.ltrChars_+"][^"+goog.i18n.bidi.rtlChars_+"]*$");goog.i18n.bidi.rtlExitDirCheckRe_=new RegExp("["+goog.i18n.bidi.rtlChars_+"][^"+goog.i18n.bidi.ltrChars_+"]*$");goog.i18n.bidi.endsWithLtr=function(a,b){return goog.i18n.bidi.ltrExitDirCheckRe_.test(goog.i18n.bidi.stripHtmlIfNeeded_(a,b))};goog.i18n.bidi.isLtrExitText=goog.i18n.bidi.endsWithLtr;
-goog.i18n.bidi.endsWithRtl=function(a,b){return goog.i18n.bidi.rtlExitDirCheckRe_.test(goog.i18n.bidi.stripHtmlIfNeeded_(a,b))};goog.i18n.bidi.isRtlExitText=goog.i18n.bidi.endsWithRtl;goog.i18n.bidi.rtlLocalesRe_=/^(ar|ckb|dv|he|iw|fa|nqo|ps|sd|ug|ur|yi|.*[-_](Adlm|Arab|Hebr|Thaa|Nkoo|Tfng))(?!.*[-_](Latn|Cyrl)($|-|_))($|-|_)/i;goog.i18n.bidi.isRtlLanguage=function(a){return goog.i18n.bidi.rtlLocalesRe_.test(a)};goog.i18n.bidi.bracketGuardTextRe_=/(\(.*?\)+)|(\[.*?\]+)|(\{.*?\}+)|(<.*?>+)/g;
+goog.i18n.bidi.endsWithRtl=function(a,b){return goog.i18n.bidi.rtlExitDirCheckRe_.test(goog.i18n.bidi.stripHtmlIfNeeded_(a,b))};goog.i18n.bidi.isRtlExitText=goog.i18n.bidi.endsWithRtl;goog.i18n.bidi.rtlLocalesRe_=/^(ar|ckb|dv|he|iw|fa|nqo|ps|sd|ug|ur|yi|.*[-_](Adlm|Arab|Hebr|Nkoo|Rohg|Thaa))(?!.*[-_](Latn|Cyrl)($|-|_))($|-|_)/i;goog.i18n.bidi.isRtlLanguage=function(a){return goog.i18n.bidi.rtlLocalesRe_.test(a)};goog.i18n.bidi.bracketGuardTextRe_=/(\(.*?\)+)|(\[.*?\]+)|(\{.*?\}+)|(<.*?>+)/g;
 goog.i18n.bidi.guardBracketInText=function(a,b){b=(void 0===b?goog.i18n.bidi.hasAnyRtl(a):b)?goog.i18n.bidi.Format.RLM:goog.i18n.bidi.Format.LRM;return a.replace(goog.i18n.bidi.bracketGuardTextRe_,b+"$&"+b)};goog.i18n.bidi.enforceRtlInHtml=function(a){return"<"==a.charAt(0)?a.replace(/<\w+/,"$& dir=rtl"):"\n<span dir=rtl>"+a+"</span>"};goog.i18n.bidi.enforceRtlInText=function(a){return goog.i18n.bidi.Format.RLE+a+goog.i18n.bidi.Format.PDF};
 goog.i18n.bidi.enforceLtrInHtml=function(a){return"<"==a.charAt(0)?a.replace(/<\w+/,"$& dir=ltr"):"\n<span dir=ltr>"+a+"</span>"};goog.i18n.bidi.enforceLtrInText=function(a){return goog.i18n.bidi.Format.LRE+a+goog.i18n.bidi.Format.PDF};goog.i18n.bidi.dimensionsRe_=/:\s*([.\d][.\w]*)\s+([.\d][.\w]*)\s+([.\d][.\w]*)\s+([.\d][.\w]*)/g;goog.i18n.bidi.leftRe_=/left/gi;goog.i18n.bidi.rightRe_=/right/gi;goog.i18n.bidi.tempRe_=/%%%%/g;
 goog.i18n.bidi.mirrorCSS=function(a){return a.replace(goog.i18n.bidi.dimensionsRe_,":$1 $4 $3 $2").replace(goog.i18n.bidi.leftRe_,"%%%%").replace(goog.i18n.bidi.rightRe_,goog.i18n.bidi.LEFT).replace(goog.i18n.bidi.tempRe_,goog.i18n.bidi.RIGHT)};goog.i18n.bidi.doubleQuoteSubstituteRe_=/([\u0591-\u05f2])"/g;goog.i18n.bidi.singleQuoteSubstituteRe_=/([\u0591-\u05f2])'/g;
@@ -317,9 +318,10 @@ goog.html.TrustedResourceUrl.prototype.cloneWithParams=function(a,b){var c=goog.
 goog.DEBUG&&(goog.html.TrustedResourceUrl.prototype.toString=function(){return"TrustedResourceUrl{"+this.privateDoNotAccessOrElseTrustedResourceUrlWrappedValue_+"}"});
 goog.html.TrustedResourceUrl.unwrap=function(a){if(a instanceof goog.html.TrustedResourceUrl&&a.constructor===goog.html.TrustedResourceUrl&&a.TRUSTED_RESOURCE_URL_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_===goog.html.TrustedResourceUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_)return a.privateDoNotAccessOrElseTrustedResourceUrlWrappedValue_;goog.asserts.fail("expected object of type TrustedResourceUrl, got '"+a+"' of type "+goog.typeOf(a));return"type_error:TrustedResourceUrl"};
 goog.html.TrustedResourceUrl.format=function(a,b){var c=goog.string.Const.unwrap(a);if(!goog.html.TrustedResourceUrl.BASE_URL_.test(c))throw Error("Invalid TrustedResourceUrl format: "+c);a=c.replace(goog.html.TrustedResourceUrl.FORMAT_MARKER_,function(a,e){if(!Object.prototype.hasOwnProperty.call(b,e))throw Error('Found marker, "'+e+'", in format string, "'+c+'", but no valid label mapping found in args: '+JSON.stringify(b));a=b[e];return a instanceof goog.string.Const?goog.string.Const.unwrap(a):
-encodeURIComponent(String(a))});return goog.html.TrustedResourceUrl.createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse(a)};goog.html.TrustedResourceUrl.FORMAT_MARKER_=/%{(\w+)}/g;goog.html.TrustedResourceUrl.BASE_URL_=/^(?:https:)?\/\/[0-9a-z.:[\]-]+\/|^\/[^\/\\]|^about:blank#/i;goog.html.TrustedResourceUrl.URL_PARAM_PARSER_=/^([^?#]*)(\?[^#]*)?(#[\s\S]*)?/;goog.html.TrustedResourceUrl.formatWithParams=function(a,b,c,d){return goog.html.TrustedResourceUrl.format(a,b).cloneWithParams(c,d)};
-goog.html.TrustedResourceUrl.fromConstant=function(a){return goog.html.TrustedResourceUrl.createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse(goog.string.Const.unwrap(a))};goog.html.TrustedResourceUrl.fromConstants=function(a){for(var b="",c=0;c<a.length;c++)b+=goog.string.Const.unwrap(a[c]);return goog.html.TrustedResourceUrl.createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse(b)};goog.html.TrustedResourceUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_={};
-goog.html.TrustedResourceUrl.createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse=function(a){var b=new goog.html.TrustedResourceUrl;b.privateDoNotAccessOrElseTrustedResourceUrlWrappedValue_=a;return b};goog.html.TrustedResourceUrl.stringifyParams_=function(a,b,c){if(null==c)return b;if(goog.isString(c))return a+encodeURIComponent(c);for(var d in c){var e=c[d];e=goog.isArray(e)?e:[e];for(var f=0;f<e.length;f++){var g=e[f];null!=g&&(b+=(b?"&":a)+encodeURIComponent(d)+"="+encodeURIComponent(String(g)))}}return b};goog.html.SafeUrl=function(){this.privateDoNotAccessOrElseSafeHtmlWrappedValue_="";this.SAFE_URL_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_=goog.html.SafeUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_};goog.html.SafeUrl.INNOCUOUS_STRING="about:invalid#zClosurez";goog.html.SafeUrl.prototype.implementsGoogStringTypedString=!0;goog.html.SafeUrl.prototype.getTypedStringValue=function(){return this.privateDoNotAccessOrElseSafeHtmlWrappedValue_};
+encodeURIComponent(String(a))});return goog.html.TrustedResourceUrl.createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse(a)};goog.html.TrustedResourceUrl.FORMAT_MARKER_=/%{(\w+)}/g;goog.html.TrustedResourceUrl.BASE_URL_=/^((https:)?\/\/[0-9a-z.:[\]-]+\/|\/[^/\\]|[^:/\\]+\/|[^:/\\]*[?#]|about:blank#)/i;goog.html.TrustedResourceUrl.URL_PARAM_PARSER_=/^([^?#]*)(\?[^#]*)?(#[\s\S]*)?/;
+goog.html.TrustedResourceUrl.formatWithParams=function(a,b,c,d){return goog.html.TrustedResourceUrl.format(a,b).cloneWithParams(c,d)};goog.html.TrustedResourceUrl.fromConstant=function(a){return goog.html.TrustedResourceUrl.createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse(goog.string.Const.unwrap(a))};goog.html.TrustedResourceUrl.fromConstants=function(a){for(var b="",c=0;c<a.length;c++)b+=goog.string.Const.unwrap(a[c]);return goog.html.TrustedResourceUrl.createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse(b)};
+goog.html.TrustedResourceUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_={};goog.html.TrustedResourceUrl.createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse=function(a){var b=new goog.html.TrustedResourceUrl;b.privateDoNotAccessOrElseTrustedResourceUrlWrappedValue_=a;return b};
+goog.html.TrustedResourceUrl.stringifyParams_=function(a,b,c){if(null==c)return b;if(goog.isString(c))return c?a+encodeURIComponent(c):"";for(var d in c){var e=c[d];e=goog.isArray(e)?e:[e];for(var f=0;f<e.length;f++){var g=e[f];null!=g&&(b||(b=a),b+=(b.length>a.length?"&":"")+encodeURIComponent(d)+"="+encodeURIComponent(String(g)))}}return b};goog.html.SafeUrl=function(){this.privateDoNotAccessOrElseSafeHtmlWrappedValue_="";this.SAFE_URL_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_=goog.html.SafeUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_};goog.html.SafeUrl.INNOCUOUS_STRING="about:invalid#zClosurez";goog.html.SafeUrl.prototype.implementsGoogStringTypedString=!0;goog.html.SafeUrl.prototype.getTypedStringValue=function(){return this.privateDoNotAccessOrElseSafeHtmlWrappedValue_};
 goog.html.SafeUrl.prototype.implementsGoogI18nBidiDirectionalString=!0;goog.html.SafeUrl.prototype.getDirection=function(){return goog.i18n.bidi.Dir.LTR};goog.DEBUG&&(goog.html.SafeUrl.prototype.toString=function(){return"SafeUrl{"+this.privateDoNotAccessOrElseSafeHtmlWrappedValue_+"}"});
 goog.html.SafeUrl.unwrap=function(a){if(a instanceof goog.html.SafeUrl&&a.constructor===goog.html.SafeUrl&&a.SAFE_URL_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_===goog.html.SafeUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_)return a.privateDoNotAccessOrElseSafeHtmlWrappedValue_;goog.asserts.fail("expected object of type SafeUrl, got '"+a+"' of type "+goog.typeOf(a));return"type_error:SafeUrl"};goog.html.SafeUrl.fromConstant=function(a){return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(goog.string.Const.unwrap(a))};
 goog.html.SAFE_MIME_TYPE_PATTERN_=/^(?:audio\/(?:3gpp2|3gpp|aac|L16|midi|mp3|mp4|mpeg|oga|ogg|opus|x-m4a|x-wav|wav|webm)|image\/(?:bmp|gif|jpeg|jpg|png|tiff|webp)|text\/csv|video\/(?:mpeg|mp4|ogg|webm|quicktime))$/i;goog.html.SafeUrl.fromBlob=function(a){a=goog.html.SAFE_MIME_TYPE_PATTERN_.test(a.type)?goog.fs.url.createObjectUrl(a):goog.html.SafeUrl.INNOCUOUS_STRING;return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(a)};goog.html.DATA_URL_PATTERN_=/^data:([^;,]*);base64,[a-z0-9+\/]+=*$/i;
@@ -329,7 +331,7 @@ goog.html.SafeUrl.fromSmsUrl=function(a){goog.string.caseInsensitiveStartsWith(a
 goog.html.SafeUrl.sanitizeChromeExtensionUrl=function(a,b){return goog.html.SafeUrl.sanitizeExtensionUrl_(/^chrome-extension:\/\/([^\/]+)\//,a,b)};goog.html.SafeUrl.sanitizeFirefoxExtensionUrl=function(a,b){return goog.html.SafeUrl.sanitizeExtensionUrl_(/^moz-extension:\/\/([^\/]+)\//,a,b)};goog.html.SafeUrl.sanitizeEdgeExtensionUrl=function(a,b){return goog.html.SafeUrl.sanitizeExtensionUrl_(/^ms-browser-extension:\/\/([^\/]+)\//,a,b)};
 goog.html.SafeUrl.sanitizeExtensionUrl_=function(a,b,c){(a=a.exec(b))?(a=a[1],-1==(c instanceof goog.string.Const?[goog.string.Const.unwrap(c)]:c.map(function(a){return goog.string.Const.unwrap(a)})).indexOf(a)&&(b=goog.html.SafeUrl.INNOCUOUS_STRING)):b=goog.html.SafeUrl.INNOCUOUS_STRING;return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(b)};goog.html.SafeUrl.fromTrustedResourceUrl=function(a){return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(goog.html.TrustedResourceUrl.unwrap(a))};
 goog.html.SAFE_URL_PATTERN_=/^(?:(?:https?|mailto|ftp):|[^:/?#]*(?:[/?#]|$))/i;goog.html.SafeUrl.SAFE_URL_PATTERN=goog.html.SAFE_URL_PATTERN_;goog.html.SafeUrl.sanitize=function(a){if(a instanceof goog.html.SafeUrl)return a;a="object"==typeof a&&a.implementsGoogStringTypedString?a.getTypedStringValue():String(a);goog.html.SAFE_URL_PATTERN_.test(a)||(a=goog.html.SafeUrl.INNOCUOUS_STRING);return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(a)};
-goog.html.SafeUrl.sanitizeAssertUnchanged=function(a){if(a instanceof goog.html.SafeUrl)return a;a="object"==typeof a&&a.implementsGoogStringTypedString?a.getTypedStringValue():String(a);goog.asserts.assert(goog.html.SAFE_URL_PATTERN_.test(a))||(a=goog.html.SafeUrl.INNOCUOUS_STRING);return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(a)};goog.html.SafeUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_={};
+goog.html.SafeUrl.sanitizeAssertUnchanged=function(a){if(a instanceof goog.html.SafeUrl)return a;a="object"==typeof a&&a.implementsGoogStringTypedString?a.getTypedStringValue():String(a);goog.asserts.assert(goog.html.SAFE_URL_PATTERN_.test(a),"%s does not match the safe URL pattern",a)||(a=goog.html.SafeUrl.INNOCUOUS_STRING);return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(a)};goog.html.SafeUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_={};
 goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse=function(a){var b=new goog.html.SafeUrl;b.privateDoNotAccessOrElseSafeHtmlWrappedValue_=a;return b};goog.html.SafeUrl.ABOUT_BLANK=goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse("about:blank");goog.html.SafeStyle=function(){this.privateDoNotAccessOrElseSafeStyleWrappedValue_="";this.SAFE_STYLE_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_=goog.html.SafeStyle.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_};goog.html.SafeStyle.prototype.implementsGoogStringTypedString=!0;goog.html.SafeStyle.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_={};
 goog.html.SafeStyle.fromConstant=function(a){a=goog.string.Const.unwrap(a);if(0===a.length)return goog.html.SafeStyle.EMPTY;goog.html.SafeStyle.checkStyle_(a);goog.asserts.assert(goog.string.endsWith(a,";"),"Last character of style string is not ';': "+a);goog.asserts.assert(goog.string.contains(a,":"),"Style string must contain at least one ':', to specify a \"name: value\" pair: "+a);return goog.html.SafeStyle.createSafeStyleSecurityPrivateDoNotAccessOrElse(a)};
 goog.html.SafeStyle.checkStyle_=function(a){goog.asserts.assert(!/[<>]/.test(a),"Forbidden characters in style string: "+a)};goog.html.SafeStyle.prototype.getTypedStringValue=function(){return this.privateDoNotAccessOrElseSafeStyleWrappedValue_};goog.DEBUG&&(goog.html.SafeStyle.prototype.toString=function(){return"SafeStyle{"+this.privateDoNotAccessOrElseSafeStyleWrappedValue_+"}"});
@@ -587,8 +589,9 @@ goog.events.KeyHandler.prototype.handleKeyDown_=function(a){(goog.userAgent.WEBK
 a.keyCode!=goog.events.KeyCodes.META&&(this.lastKey_=goog.events.KeyCodes.META));goog.events.KeyHandler.USES_KEYDOWN_&&!goog.events.KeyCodes.firesKeyPressEvent(a.keyCode,this.lastKey_,a.shiftKey,a.ctrlKey,a.altKey,a.metaKey)?this.handleEvent(a):(this.keyCode_=goog.events.KeyCodes.normalizeKeyCode(a.keyCode),goog.events.KeyHandler.SAVE_ALT_FOR_KEYPRESS_&&(this.altKey_=a.altKey))};goog.events.KeyHandler.prototype.resetState=function(){this.keyCode_=this.lastKey_=-1};
 goog.events.KeyHandler.prototype.handleKeyup_=function(a){this.resetState();this.altKey_=a.altKey};
 goog.events.KeyHandler.prototype.handleEvent=function(a){var b=a.getBrowserEvent(),c=b.altKey;if(goog.userAgent.IE&&a.type==goog.events.EventType.KEYPRESS){var d=this.keyCode_;var e=d!=goog.events.KeyCodes.ENTER&&d!=goog.events.KeyCodes.ESC?b.keyCode:0}else(goog.userAgent.WEBKIT||goog.userAgent.EDGE)&&a.type==goog.events.EventType.KEYPRESS?(d=this.keyCode_,e=0<=b.charCode&&63232>b.charCode&&goog.events.KeyCodes.isCharacterKey(d)?b.charCode:0):goog.userAgent.OPERA&&!goog.userAgent.WEBKIT?(d=this.keyCode_,
-e=goog.events.KeyCodes.isCharacterKey(d)?b.keyCode:0):(d=b.keyCode||this.keyCode_,e=b.charCode||0,goog.events.KeyHandler.SAVE_ALT_FOR_KEYPRESS_&&a.type==goog.events.EventType.KEYPRESS&&(c=this.altKey_),goog.userAgent.MAC&&e==goog.events.KeyCodes.QUESTION_MARK&&d==goog.events.KeyCodes.WIN_KEY&&(d=goog.events.KeyCodes.SLASH));var f=d=goog.events.KeyCodes.normalizeKeyCode(d);d?63232<=d&&d in goog.events.KeyHandler.safariKey_?f=goog.events.KeyHandler.safariKey_[d]:25==d&&a.shiftKey&&(f=9):b.keyIdentifier&&
-b.keyIdentifier in goog.events.KeyHandler.keyIdentifier_&&(f=goog.events.KeyHandler.keyIdentifier_[b.keyIdentifier]);goog.userAgent.GECKO&&goog.events.KeyHandler.USES_KEYDOWN_&&a.type==goog.events.EventType.KEYPRESS&&!goog.events.KeyCodes.firesKeyPressEvent(f,this.lastKey_,a.shiftKey,a.ctrlKey,c,a.metaKey)||(a=f==this.lastKey_,this.lastKey_=f,b=new goog.events.KeyEvent(f,e,a,b),b.altKey=c,this.dispatchEvent(b))};goog.events.KeyHandler.prototype.getElement=function(){return this.element_};
+e=goog.events.KeyCodes.isCharacterKey(d)?b.keyCode:0):(a.type==goog.events.EventType.KEYPRESS?(goog.events.KeyHandler.SAVE_ALT_FOR_KEYPRESS_&&(c=this.altKey_),b.keyCode==b.charCode?32>b.keyCode?(d=b.keyCode,e=0):(d=this.keyCode_,e=b.charCode):(d=b.keyCode||this.keyCode_,e=b.charCode||0)):(d=b.keyCode||this.keyCode_,e=b.charCode||0),goog.userAgent.MAC&&e==goog.events.KeyCodes.QUESTION_MARK&&d==goog.events.KeyCodes.WIN_KEY&&(d=goog.events.KeyCodes.SLASH));var f=d=goog.events.KeyCodes.normalizeKeyCode(d);
+d?63232<=d&&d in goog.events.KeyHandler.safariKey_?f=goog.events.KeyHandler.safariKey_[d]:25==d&&a.shiftKey&&(f=9):b.keyIdentifier&&b.keyIdentifier in goog.events.KeyHandler.keyIdentifier_&&(f=goog.events.KeyHandler.keyIdentifier_[b.keyIdentifier]);goog.userAgent.GECKO&&goog.events.KeyHandler.USES_KEYDOWN_&&a.type==goog.events.EventType.KEYPRESS&&!goog.events.KeyCodes.firesKeyPressEvent(f,this.lastKey_,a.shiftKey,a.ctrlKey,c,a.metaKey)||(a=f==this.lastKey_,this.lastKey_=f,b=new goog.events.KeyEvent(f,
+e,a,b),b.altKey=c,this.dispatchEvent(b))};goog.events.KeyHandler.prototype.getElement=function(){return this.element_};
 goog.events.KeyHandler.prototype.attach=function(a,b){this.keyUpKey_&&this.detach();this.element_=a;this.keyPressKey_=goog.events.listen(this.element_,goog.events.EventType.KEYPRESS,this,b);this.keyDownKey_=goog.events.listen(this.element_,goog.events.EventType.KEYDOWN,this.handleKeyDown_,b,this);this.keyUpKey_=goog.events.listen(this.element_,goog.events.EventType.KEYUP,this.handleKeyup_,b,this)};
 goog.events.KeyHandler.prototype.detach=function(){this.keyPressKey_&&(goog.events.unlistenByKey(this.keyPressKey_),goog.events.unlistenByKey(this.keyDownKey_),goog.events.unlistenByKey(this.keyUpKey_),this.keyUpKey_=this.keyDownKey_=this.keyPressKey_=null);this.element_=null;this.keyCode_=this.lastKey_=-1};goog.events.KeyHandler.prototype.disposeInternal=function(){goog.events.KeyHandler.superClass_.disposeInternal.call(this);this.detach()};
 goog.events.KeyEvent=function(a,b,c,d){goog.events.BrowserEvent.call(this,d);this.type=goog.events.KeyHandler.EventType.KEY;this.keyCode=a;this.charCode=b;this.repeat=c};goog.inherits(goog.events.KeyEvent,goog.events.BrowserEvent);goog.ui.ComponentUtil={};goog.ui.ComponentUtil.getMouseEventType=function(a){return a.pointerEventsEnabled()?goog.events.PointerAsMouseEventType:goog.events.EventType};goog.dom.classlist={};goog.dom.classlist.ALWAYS_USE_DOM_TOKEN_LIST=!1;goog.dom.classlist.get=function(a){if(goog.dom.classlist.ALWAYS_USE_DOM_TOKEN_LIST||a.classList)return a.classList;a=a.className;return goog.isString(a)&&a.match(/\S+/g)||[]};goog.dom.classlist.set=function(a,b){a.className=b};goog.dom.classlist.contains=function(a,b){return goog.dom.classlist.ALWAYS_USE_DOM_TOKEN_LIST||a.classList?a.classList.contains(b):goog.array.contains(goog.dom.classlist.get(a),b)};
@@ -750,7 +753,7 @@ goog.debug.Logger.prototype.callPublish_=function(a){if(this.handlers_)for(var b
 goog.debug.LogManager.initialize=function(){goog.debug.LogManager.rootLogger_||(goog.debug.LogManager.rootLogger_=new goog.debug.Logger(goog.debug.Logger.ROOT_LOGGER_NAME),goog.debug.LogManager.loggers_[goog.debug.Logger.ROOT_LOGGER_NAME]=goog.debug.LogManager.rootLogger_,goog.debug.LogManager.rootLogger_.setLevel(goog.debug.Logger.Level.CONFIG))};goog.debug.LogManager.getLoggers=function(){return goog.debug.LogManager.loggers_};
 goog.debug.LogManager.getRoot=function(){goog.debug.LogManager.initialize();return goog.debug.LogManager.rootLogger_};goog.debug.LogManager.getLogger=function(a){goog.debug.LogManager.initialize();return goog.debug.LogManager.loggers_[a]||goog.debug.LogManager.createLogger_(a)};goog.debug.LogManager.createFunctionForCatchErrors=function(a){return function(b){(a||goog.debug.LogManager.getRoot()).severe("Error: "+b.message+" ("+b.fileName+" @ Line: "+b.line+")")}};
 goog.debug.LogManager.createLogger_=function(a){var b=new goog.debug.Logger(a);if(goog.debug.Logger.ENABLE_HIERARCHY){var c=a.lastIndexOf("."),d=a.substr(0,c);c=a.substr(c+1);d=goog.debug.LogManager.getLogger(d);d.addChild_(c,b);b.setParent_(d)}return goog.debug.LogManager.loggers_[a]=b};goog.log={};goog.log.ENABLED=goog.debug.LOGGING_ENABLED;goog.log.ROOT_LOGGER_NAME=goog.debug.Logger.ROOT_LOGGER_NAME;goog.log.Logger=goog.debug.Logger;goog.log.Level=goog.debug.Logger.Level;goog.log.LogRecord=goog.debug.LogRecord;goog.log.getLogger=function(a,b){return goog.log.ENABLED?(a=goog.debug.LogManager.getLogger(a),b&&a&&a.setLevel(b),a):null};goog.log.addHandler=function(a,b){goog.log.ENABLED&&a&&a.addHandler(b)};
-goog.log.removeHandler=function(a,b){return goog.log.ENABLED&&a?a.removeHandler(b):!1};goog.log.log=function(a,b,c,d){goog.log.ENABLED&&a&&a.log(b,c,d)};goog.log.error=function(a,b,c){goog.log.ENABLED&&a&&a.severe(b,c)};goog.log.warning=function(a,b,c){goog.log.ENABLED&&a&&a.warning(b,c)};goog.log.info=function(a,b,c){goog.log.ENABLED&&a&&a.info(b,c)};goog.log.fine=function(a,b,c){goog.log.ENABLED&&a&&a.fine(b,c)};goog.Thenable=function(){};goog.Thenable.prototype.then=function(a,b,c){};goog.Thenable.IMPLEMENTED_BY_PROP="$goog_Thenable";goog.Thenable.addImplementation=function(a){a.prototype.then=a.prototype.then;COMPILED?a.prototype[goog.Thenable.IMPLEMENTED_BY_PROP]=!0:a.prototype.$goog_Thenable=!0};goog.Thenable.isImplementedBy=function(a){if(!a)return!1;try{return COMPILED?!!a[goog.Thenable.IMPLEMENTED_BY_PROP]:!!a.$goog_Thenable}catch(b){return!1}};goog.async={};goog.async.FreeList=function(a,b,c){this.limit_=c;this.create_=a;this.reset_=b;this.occupants_=0;this.head_=null};goog.async.FreeList.prototype.get=function(){if(0<this.occupants_){this.occupants_--;var a=this.head_;this.head_=a.next;a.next=null}else a=this.create_();return a};goog.async.FreeList.prototype.put=function(a){this.reset_(a);this.occupants_<this.limit_&&(this.occupants_++,a.next=this.head_,this.head_=a)};goog.async.FreeList.prototype.occupants=function(){return this.occupants_};goog.async.WorkQueue=function(){this.workTail_=this.workHead_=null};goog.async.WorkQueue.DEFAULT_MAX_UNUSED=100;goog.async.WorkQueue.freelist_=new goog.async.FreeList(function(){return new goog.async.WorkItem},function(a){a.reset()},goog.async.WorkQueue.DEFAULT_MAX_UNUSED);goog.async.WorkQueue.prototype.add=function(a,b){var c=this.getUnusedItem_();c.set(a,b);this.workTail_?this.workTail_.next=c:(goog.asserts.assert(!this.workHead_),this.workHead_=c);this.workTail_=c};
+goog.log.removeHandler=function(a,b){return goog.log.ENABLED&&a?a.removeHandler(b):!1};goog.log.log=function(a,b,c,d){goog.log.ENABLED&&a&&a.log(b,c,d)};goog.log.error=function(a,b,c){goog.log.ENABLED&&a&&a.severe(b,c)};goog.log.warning=function(a,b,c){goog.log.ENABLED&&a&&a.warning(b,c)};goog.log.info=function(a,b,c){goog.log.ENABLED&&a&&a.info(b,c)};goog.log.fine=function(a,b,c){goog.log.ENABLED&&a&&a.fine(b,c)};goog.Thenable=function(){};goog.Thenable.prototype.then=function(a,b,c){};goog.Thenable.IMPLEMENTED_BY_PROP="$goog_Thenable";goog.Thenable.addImplementation=function(a){COMPILED?a.prototype[goog.Thenable.IMPLEMENTED_BY_PROP]=!0:a.prototype.$goog_Thenable=!0};goog.Thenable.isImplementedBy=function(a){if(!a)return!1;try{return COMPILED?!!a[goog.Thenable.IMPLEMENTED_BY_PROP]:!!a.$goog_Thenable}catch(b){return!1}};goog.async={};goog.async.FreeList=function(a,b,c){this.limit_=c;this.create_=a;this.reset_=b;this.occupants_=0;this.head_=null};goog.async.FreeList.prototype.get=function(){if(0<this.occupants_){this.occupants_--;var a=this.head_;this.head_=a.next;a.next=null}else a=this.create_();return a};goog.async.FreeList.prototype.put=function(a){this.reset_(a);this.occupants_<this.limit_&&(this.occupants_++,a.next=this.head_,this.head_=a)};goog.async.FreeList.prototype.occupants=function(){return this.occupants_};goog.async.WorkQueue=function(){this.workTail_=this.workHead_=null};goog.async.WorkQueue.DEFAULT_MAX_UNUSED=100;goog.async.WorkQueue.freelist_=new goog.async.FreeList(function(){return new goog.async.WorkItem},function(a){a.reset()},goog.async.WorkQueue.DEFAULT_MAX_UNUSED);goog.async.WorkQueue.prototype.add=function(a,b){var c=this.getUnusedItem_();c.set(a,b);this.workTail_?this.workTail_.next=c:(goog.asserts.assert(!this.workHead_),this.workHead_=c);this.workTail_=c};
 goog.async.WorkQueue.prototype.remove=function(){var a=null;this.workHead_&&(a=this.workHead_,this.workHead_=this.workHead_.next,this.workHead_||(this.workTail_=null),a.next=null);return a};goog.async.WorkQueue.prototype.returnUnused=function(a){goog.async.WorkQueue.freelist_.put(a)};goog.async.WorkQueue.prototype.getUnusedItem_=function(){return goog.async.WorkQueue.freelist_.get()};goog.async.WorkItem=function(){this.next=this.scope=this.fn=null};
 goog.async.WorkItem.prototype.set=function(a,b){this.fn=a;this.scope=b;this.next=null};goog.async.WorkItem.prototype.reset=function(){this.next=this.scope=this.fn=null};goog.async.throwException=function(a){goog.global.setTimeout(function(){throw a;},0)};goog.async.nextTick=function(a,b,c){var d=a;b&&(d=goog.bind(a,b));d=goog.async.nextTick.wrapCallback_(d);goog.isFunction(goog.global.setImmediate)&&(c||goog.async.nextTick.useSetImmediate_())?goog.global.setImmediate(d):(goog.async.nextTick.setImmediate_||(goog.async.nextTick.setImmediate_=goog.async.nextTick.getSetImmediateEmulator_()),goog.async.nextTick.setImmediate_(d))};
 goog.async.nextTick.useSetImmediate_=function(){return goog.global.Window&&goog.global.Window.prototype&&!goog.labs.userAgent.browser.isEdge()&&goog.global.Window.prototype.setImmediate==goog.global.setImmediate?!1:!0};
@@ -892,7 +895,7 @@ Blockly.utils.is3dSupported=function(){if(void 0!==Blockly.utils.is3dSupported.c
 if(!b)return document.body.removeChild(a),!1;b=b.getPropertyValue(c[d])}document.body.removeChild(a);Blockly.utils.is3dSupported.cached_="none"!==b;return Blockly.utils.is3dSupported.cached_};Blockly.utils.insertAfter=function(a,b){var c=b.nextSibling;b=b.parentNode;if(!b)throw Error("Reference node has no parent.");c?b.insertBefore(a,c):b.appendChild(a)};
 Blockly.utils.runAfterPageLoad=function(a){if("object"!=typeof document)throw Error("Blockly.utils.runAfterPageLoad() requires browser document.");if("complete"==document.readyState)a();else var b=setInterval(function(){"complete"==document.readyState&&(clearInterval(b),a())},10)};Blockly.utils.setCssTransform=function(a,b){a.style.transform=b;a.style["-webkit-transform"]=b};
 Blockly.utils.getViewportBBox=function(){var a=goog.dom.getViewportSize(),b=goog.style.getViewportPageOffset(document);return{right:a.width+b.x,bottom:a.height+b.y,top:b.y,left:b.x}};Blockly.utils.startsWith=function(a,b){return 0==a.lastIndexOf(b,0)};Blockly.utils.arrayRemove=function(a,b){b=a.indexOf(b);if(-1==b)return!1;a.splice(b,1);return!0};Blockly.utils.toRadians=function(a){return a*Math.PI/180};Blockly.utils.toDegrees=function(a){return 180*a/Math.PI};
-Blockly.utils.containsNode=function(a,b){return!!(a.compareDocumentPosition(b)&Node.DOCUMENT_POSITION_CONTAINED_BY)};
+Blockly.utils.containsNode=function(a,b){return!!(a.compareDocumentPosition(b)&Node.DOCUMENT_POSITION_CONTAINED_BY)};Blockly.utils.getBlockTypeCounts=function(a,b){var c=Object.create(null),d=a.getDescendants(!0);b&&(a=a.getNextBlock())&&(a=d.indexOf(a),d.splice(a,d.length-a));for(a=0;b=d[a];a++)c[b.type]?c[b.type]++:c[b.type]=1;return c};
 Blockly.Touch={};Blockly.Touch.touchIdentifier_=null;Blockly.Touch.TOUCH_MAP={};
 goog.global.PointerEvent?Blockly.Touch.TOUCH_MAP={mousedown:["pointerdown"],mouseenter:["pointerenter"],mouseleave:["pointerleave"],mousemove:["pointermove"],mouseout:["pointerout"],mouseover:["pointerover"],mouseup:["pointerup","pointercancel"],touchend:["pointerup"],touchcancel:["pointercancel"]}:goog.events.BrowserFeature.TOUCH_ENABLED&&(Blockly.Touch.TOUCH_MAP={mousedown:["touchstart"],mousemove:["touchmove"],mouseup:["touchend","touchcancel"]});Blockly.longPid_=0;
 Blockly.longStart_=function(a,b){Blockly.longStop_();a.changedTouches&&1!=a.changedTouches.length||(Blockly.longPid_=setTimeout(function(){a.changedTouches&&(a.button=2,a.clientX=a.changedTouches[0].clientX,a.clientY=a.changedTouches[0].clientY);b&&b.handleRightClick(a)},Blockly.LONGPRESS))};Blockly.longStop_=function(){Blockly.longPid_&&(clearTimeout(Blockly.longPid_),Blockly.longPid_=0)};Blockly.Touch.clearTouchIdentifier=function(){Blockly.Touch.touchIdentifier_=null};
@@ -948,7 +951,7 @@ Blockly.Xml.fieldToDom_=function(a){if(a.name&&a.EDITABLE){if(a.referencesVariab
 Blockly.Xml.blockToDom=function(a,b){var c=Blockly.Xml.utils.createElement(a.isShadow()?"shadow":"block");c.setAttribute("type",a.type);b||c.setAttribute("id",a.id);if(a.mutationToDom){var d=a.mutationToDom();d&&(d.hasChildNodes()||d.hasAttributes())&&c.appendChild(d)}Blockly.Xml.allFieldsToDom_(a,c);var e=a.getCommentText();e&&(d=Blockly.Xml.utils.createElement("comment"),d.appendChild(Blockly.Xml.utils.createTextNode(e)),"object"==typeof a.comment&&(d.setAttribute("pinned",a.comment.isVisible()),
 e=a.comment.getBubbleSize(),d.setAttribute("h",e.height),d.setAttribute("w",e.width)),c.appendChild(d));a.data&&(d=Blockly.Xml.utils.createElement("data"),d.appendChild(Blockly.Xml.utils.createTextNode(a.data)),c.appendChild(d));e=0;for(var f;f=a.inputList[e];e++){var g,h=!0;if(f.type!=Blockly.DUMMY_INPUT){var k=f.connection.targetBlock();f.type==Blockly.INPUT_VALUE?g=Blockly.Xml.utils.createElement("value"):f.type==Blockly.NEXT_STATEMENT&&(g=Blockly.Xml.utils.createElement("statement"));d=f.connection.getShadowDom();
 !d||k&&k.isShadow()||g.appendChild(Blockly.Xml.cloneShadow_(d));k&&(g.appendChild(Blockly.Xml.blockToDom(k,b)),h=!1);g.setAttribute("name",f.name);h||c.appendChild(g)}}a.inputsInlineDefault!=a.inputsInline&&c.setAttribute("inline",a.inputsInline);a.isCollapsed()&&c.setAttribute("collapsed",!0);a.disabled&&c.setAttribute("disabled",!0);a.isDeletable()||a.isShadow()||c.setAttribute("deletable",!1);a.isMovable()||a.isShadow()||c.setAttribute("movable",!1);a.isEditable()||c.setAttribute("editable",!1);
-if(e=a.getNextBlock())g=Blockly.Xml.utils.createElement("next"),g.appendChild(Blockly.Xml.utils.createTextNode(Blockly.Xml.blockToDom(e,b))),c.appendChild(g);d=a.nextConnection&&a.nextConnection.getShadowDom();!d||e&&e.isShadow()||g.appendChild(Blockly.Xml.cloneShadow_(d));return c};
+if(e=a.getNextBlock())g=Blockly.Xml.utils.createElement("next"),g.appendChild(Blockly.Xml.blockToDom(e,b)),c.appendChild(g);d=a.nextConnection&&a.nextConnection.getShadowDom();!d||e&&e.isShadow()||g.appendChild(Blockly.Xml.cloneShadow_(d));return c};
 Blockly.Xml.cloneShadow_=function(a){for(var b=a=a.cloneNode(!0),c;b;)if(b.firstChild)b=b.firstChild;else{for(;b&&!b.nextSibling;)c=b,b=b.parentNode,3==c.nodeType&&""==c.data.trim()&&b.firstChild!=c&&Blockly.utils.removeNode(c);b&&(c=b,b=b.nextSibling,3==c.nodeType&&""==c.data.trim()&&Blockly.utils.removeNode(c))}return a};Blockly.Xml.domToText=function(a){return Blockly.Xml.utils.domToText(a)};
 Blockly.Xml.domToPrettyText=function(a){a=Blockly.Xml.domToText(a).split("<");for(var b="",c=1;c<a.length;c++){var d=a[c];"/"==d[0]&&(b=b.substring(2));a[c]=b+"<"+d;"/"!=d[0]&&"/>"!=d.slice(-2)&&(b+="  ")}a=a.join("\n");a=a.replace(/(<(\w+)\b[^>]*>[^\n]*)\n *<\/\2>/g,"$1</$2>");return a.replace(/^\n/,"")};
 Blockly.Xml.textToDom=function(a){a=Blockly.Xml.utils.textToDomDocument(a);if(!a||!a.documentElement||"xml"!=a.documentElement.nodeName.toLowerCase())throw TypeError("Blockly.Xml.textToDom expected an <xml> document.");return a.documentElement};Blockly.Xml.clearWorkspaceAndLoadFromXml=function(a,b){b.setResizesEnabled(!1);b.clear();a=Blockly.Xml.domToWorkspace(a,b);b.setResizesEnabled(!0);return a};
@@ -984,17 +987,21 @@ Blockly.WorkspaceComment.prototype.setDeletable=function(a){this.deletable_=a};B
 Blockly.WorkspaceComment.prototype.setContent=function(a){this.content_!=a&&(Blockly.Events.fire(new Blockly.Events.CommentChange(this,this.content_,a)),this.content_=a)};Blockly.WorkspaceComment.prototype.toXmlWithXY=function(a){a=this.toXml(a);a.setAttribute("x",Math.round(this.xy_.x));a.setAttribute("y",Math.round(this.xy_.y));a.setAttribute("h",this.height_);a.setAttribute("w",this.width_);return a};
 Blockly.WorkspaceComment.prototype.toXml=function(a){var b=Blockly.Xml.utils.createElement("comment");a||b.setAttribute("id",this.id);b.textContent=this.getContent();return b};Blockly.WorkspaceComment.fireCreateEvent=function(a){if(Blockly.Events.isEnabled()){var b=Blockly.Events.getGroup();b||Blockly.Events.setGroup(!0);try{Blockly.Events.fire(new Blockly.Events.CommentCreate(a))}finally{b||Blockly.Events.setGroup(!1)}}};
 Blockly.WorkspaceComment.fromXml=function(a,b){var c=Blockly.WorkspaceComment.parseAttributes(a);b=new Blockly.WorkspaceComment(b,c.content,c.h,c.w,c.id);c=parseInt(a.getAttribute("x"),10);a=parseInt(a.getAttribute("y"),10);isNaN(c)||isNaN(a)||b.moveBy(c,a);Blockly.WorkspaceComment.fireCreateEvent(b);return b};
-Blockly.WorkspaceComment.parseAttributes=function(a){var b=a.getAttribute("h"),c=a.getAttribute("w");return{id:a.getAttribute("id"),h:b?parseInt(b,10):100,w:c?parseInt(c,10):100,x:parseInt(a.getAttribute("x"),10),y:parseInt(a.getAttribute("y"),10),content:a.textContent}};Blockly.Workspace=function(a){this.id=Blockly.utils.genUid();Blockly.Workspace.WorkspaceDB_[this.id]=this;this.options=a||{};this.RTL=!!this.options.RTL;this.horizontalLayout=!!this.options.horizontalLayout;this.toolboxPosition=this.options.toolboxPosition;this.topBlocks_=[];this.topComments_=[];this.commentDB_=Object.create(null);this.listeners_=[];this.undoStack_=[];this.redoStack_=[];this.blockDB_=Object.create(null);this.variableMap_=new Blockly.VariableMap(this);this.potentialVariableMap_=null};
-Blockly.Workspace.prototype.rendered=!1;Blockly.Workspace.prototype.isClearing=!1;Blockly.Workspace.prototype.MAX_UNDO=1024;Blockly.Workspace.prototype.dispose=function(){this.listeners_.length=0;this.clear();delete Blockly.Workspace.WorkspaceDB_[this.id]};Blockly.Workspace.SCAN_ANGLE=3;Blockly.Workspace.prototype.addTopBlock=function(a){this.topBlocks_.push(a)};
-Blockly.Workspace.prototype.removeTopBlock=function(a){if(!Blockly.utils.arrayRemove(this.topBlocks_,a))throw Error("Block not present in workspace's list of top-most blocks.");};Blockly.Workspace.prototype.getTopBlocks=function(a){var b=[].concat(this.topBlocks_);if(a&&1<b.length){var c=Math.sin(Blockly.utils.toRadians(Blockly.Workspace.SCAN_ANGLE));this.RTL&&(c*=-1);b.sort(function(a,b){a=a.getRelativeToSurfaceXY();b=b.getRelativeToSurfaceXY();return a.y+c*a.x-(b.y+c*b.x)})}return b};
+Blockly.WorkspaceComment.parseAttributes=function(a){var b=a.getAttribute("h"),c=a.getAttribute("w");return{id:a.getAttribute("id"),h:b?parseInt(b,10):100,w:c?parseInt(c,10):100,x:parseInt(a.getAttribute("x"),10),y:parseInt(a.getAttribute("y"),10),content:a.textContent}};Blockly.Workspace=function(a){this.id=Blockly.utils.genUid();Blockly.Workspace.WorkspaceDB_[this.id]=this;this.options=a||{};this.RTL=!!this.options.RTL;this.horizontalLayout=!!this.options.horizontalLayout;this.toolboxPosition=this.options.toolboxPosition;this.topBlocks_=[];this.topComments_=[];this.commentDB_=Object.create(null);this.listeners_=[];this.undoStack_=[];this.redoStack_=[];this.blockDB_=Object.create(null);this.typedBlocksDB_=Object.create(null);this.variableMap_=new Blockly.VariableMap(this);
+this.potentialVariableMap_=null};Blockly.Workspace.prototype.rendered=!1;Blockly.Workspace.prototype.isClearing=!1;Blockly.Workspace.prototype.MAX_UNDO=1024;Blockly.Workspace.prototype.dispose=function(){this.listeners_.length=0;this.clear();delete Blockly.Workspace.WorkspaceDB_[this.id]};Blockly.Workspace.SCAN_ANGLE=3;
+Blockly.Workspace.prototype.sortObjects_=function(a,b){a=a.getRelativeToSurfaceXY();b=b.getRelativeToSurfaceXY();return a.y+Blockly.Workspace.prototype.sortObjects_.offset*a.x-(b.y+Blockly.Workspace.prototype.sortObjects_.offset*b.x)};Blockly.Workspace.prototype.addTopBlock=function(a){this.topBlocks_.push(a)};Blockly.Workspace.prototype.removeTopBlock=function(a){if(!Blockly.utils.arrayRemove(this.topBlocks_,a))throw Error("Block not present in workspace's list of top-most blocks.");};
+Blockly.Workspace.prototype.getTopBlocks=function(a){var b=[].concat(this.topBlocks_);a&&1<b.length&&(this.sortObjects_.offset=Math.sin(Blockly.utils.toRadians(Blockly.Workspace.SCAN_ANGLE)),this.RTL&&(this.sortObjects_.offset*=-1),b.sort(this.sortObjects_));return b};Blockly.Workspace.prototype.addTypedBlock=function(a){this.typedBlocksDB_[a.type]||(this.typedBlocksDB_[a.type]=[]);this.typedBlocksDB_[a.type].push(a)};
+Blockly.Workspace.prototype.removeTypedBlock=function(a){this.typedBlocksDB_[a.type].splice(this.typedBlocksDB_[a.type].indexOf(a),1);this.typedBlocksDB_[a.type].length||delete this.typedBlocksDB_[a.type]};
+Blockly.Workspace.prototype.getBlocksByType=function(a,b){if(!this.typedBlocksDB_[a])return[];a=this.typedBlocksDB_[a].slice(0);b&&1<a.length&&(this.sortObjects_.offset=Math.sign(Blockly.utils.toRadians(Blockly.Workspace.SCAN_ANGLE)),this.RTL&&(this.sortObjects_.offset*=-1),a.sort(this.sortObjects_));return a};
 Blockly.Workspace.prototype.addTopComment=function(a){this.topComments_.push(a);this.commentDB_[a.id]&&console.warn('Overriding an existing comment on this workspace, with id "'+a.id+'"');this.commentDB_[a.id]=a};Blockly.Workspace.prototype.removeTopComment=function(a){if(!Blockly.utils.arrayRemove(this.topComments_,a))throw Error("Comment not present in workspace's list of top-most comments.");delete this.commentDB_[a.id]};
-Blockly.Workspace.prototype.getTopComments=function(a){var b=[].concat(this.topComments_);if(a&&1<b.length){var c=Math.sin(Blockly.utils.toRadians(Blockly.Workspace.SCAN_ANGLE));this.RTL&&(c*=-1);b.sort(function(a,b){a=a.getRelativeToSurfaceXY();b=b.getRelativeToSurfaceXY();return a.y+c*a.x-(b.y+c*b.x)})}return b};
+Blockly.Workspace.prototype.getTopComments=function(a){var b=[].concat(this.topComments_);a&&1<b.length&&(this.sortObjects_.offset=Math.sin(Blockly.utils.toRadians(Blockly.Workspace.SCAN_ANGLE)),this.RTL&&(this.sortObjects_.offset*=-1),b.sort(this.sortObjects_));return b};
 Blockly.Workspace.prototype.getAllBlocks=function(a){if(a){a=this.getTopBlocks(!0);for(var b=[],c=0;c<a.length;c++)b.push.apply(b,a[c].getDescendants(!0))}else for(b=this.getTopBlocks(!1),c=0;c<b.length;c++)b.push.apply(b,b[c].getChildren(!1));return b};
 Blockly.Workspace.prototype.clear=function(){this.isClearing=!0;try{var a=Blockly.Events.getGroup();for(a||Blockly.Events.setGroup(!0);this.topBlocks_.length;)this.topBlocks_[0].dispose();for(;this.topComments_.length;)this.topComments_[this.topComments_.length-1].dispose();a||Blockly.Events.setGroup(!1);this.variableMap_.clear();this.potentialVariableMap_&&this.potentialVariableMap_.clear()}finally{this.isClearing=!1}};
 Blockly.Workspace.prototype.renameVariableById=function(a,b){this.variableMap_.renameVariableById(a,b)};Blockly.Workspace.prototype.createVariable=function(a,b,c){return this.variableMap_.createVariable(a,b,c)};Blockly.Workspace.prototype.getVariableUsesById=function(a){return this.variableMap_.getVariableUsesById(a)};Blockly.Workspace.prototype.deleteVariableById=function(a){this.variableMap_.deleteVariableById(a)};
 Blockly.Workspace.prototype.deleteVariableInternal_=function(a,b){this.variableMap_.deleteVariableInternal_(a,b)};Blockly.Workspace.prototype.variableIndexOf=function(a){console.warn("Deprecated call to Blockly.Workspace.prototype.variableIndexOf");return-1};Blockly.Workspace.prototype.getVariable=function(a,b){return this.variableMap_.getVariable(a,b)};Blockly.Workspace.prototype.getVariableById=function(a){return this.variableMap_.getVariableById(a)};
 Blockly.Workspace.prototype.getVariablesOfType=function(a){return this.variableMap_.getVariablesOfType(a)};Blockly.Workspace.prototype.getVariableTypes=function(){return this.variableMap_.getVariableTypes()};Blockly.Workspace.prototype.getAllVariables=function(){return this.variableMap_.getAllVariables()};Blockly.Workspace.prototype.getWidth=function(){return 0};Blockly.Workspace.prototype.newBlock=function(a,b){return new Blockly.Block(this,a,b)};
-Blockly.Workspace.prototype.remainingCapacity=function(){return isNaN(this.options.maxBlocks)?Infinity:this.options.maxBlocks-this.getAllBlocks().length};
+Blockly.Workspace.prototype.remainingCapacity=function(){return isNaN(this.options.maxBlocks)?Infinity:this.options.maxBlocks-this.getAllBlocks().length};Blockly.Workspace.prototype.remainingCapacityOfType=function(a){return this.options.maxInstances?(this.options.maxInstances[a]||Infinity)-this.getBlocksByType(a).length:Infinity};
+Blockly.Workspace.prototype.isCapacityAvailable=function(a){if(!this.hasBlockLimits())return!0;var b=0,c;for(c in a){if(a[c]>this.remainingCapacityOfType(c))return!1;b+=a[c]}return b>this.remainingCapacity()?!1:!0};Blockly.Workspace.prototype.hasBlockLimits=function(){return Infinity!=this.options.maxBlocks||!!this.options.maxInstances};
 Blockly.Workspace.prototype.undo=function(a){var b=a?this.redoStack_:this.undoStack_,c=a?this.undoStack_:this.redoStack_,d=b.pop();if(d){for(var e=[d];b.length&&d.group&&d.group==b[b.length-1].group;)e.push(b.pop());for(b=0;d=e[b];b++)c.push(d);e=Blockly.Events.filter(e,a);Blockly.Events.recordUndo=!1;try{for(b=0;d=e[b];b++)d.run(a)}finally{Blockly.Events.recordUndo=!0}}};Blockly.Workspace.prototype.clearUndo=function(){this.undoStack_.length=0;this.redoStack_.length=0;Blockly.Events.clearPendingUndo()};
 Blockly.Workspace.prototype.addChangeListener=function(a){this.listeners_.push(a);return a};Blockly.Workspace.prototype.removeChangeListener=function(a){Blockly.utils.arrayRemove(this.listeners_,a)};Blockly.Workspace.prototype.fireChangeListener=function(a){if(a.recordUndo)for(this.undoStack_.push(a),this.redoStack_.length=0;this.undoStack_.length>this.MAX_UNDO&&0<=this.MAX_UNDO;)this.undoStack_.shift();for(var b=0,c;c=this.listeners_[b];b++)c(a)};
 Blockly.Workspace.prototype.getBlockById=function(a){return this.blockDB_[a]||null};Blockly.Workspace.prototype.getCommentById=function(a){return this.commentDB_[a]||null};Blockly.Workspace.prototype.allInputsFilled=function(a){for(var b=this.getTopBlocks(!1),c=0,d;d=b[c];c++)if(!d.allInputsFilled(a))return!1;return!0};Blockly.Workspace.prototype.getPotentialVariableMap=function(){return this.potentialVariableMap_};
@@ -1022,7 +1029,7 @@ Blockly.Bubble.prototype.getRelativeToSurfaceXY=function(){return new goog.math.
 Blockly.Events.Ui.prototype.toJson=function(){var a=Blockly.Events.Ui.superClass_.toJson.call(this);a.element=this.element;void 0!==this.newValue&&(a.newValue=this.newValue);this.blockId&&(a.blockId=this.blockId);return a};Blockly.Events.Ui.prototype.fromJson=function(a){Blockly.Events.Ui.superClass_.fromJson.call(this,a);this.element=a.element;this.newValue=a.newValue;this.blockId=a.blockId};Blockly.Icon=function(a){this.block_=a};Blockly.Icon.prototype.collapseHidden=!0;Blockly.Icon.prototype.SIZE=17;Blockly.Icon.prototype.bubble_=null;Blockly.Icon.prototype.iconXY_=null;
 Blockly.Icon.prototype.createIcon=function(){this.iconGroup_||(this.iconGroup_=Blockly.utils.createSvgElement("g",{"class":"blocklyIconGroup"},null),this.block_.isInFlyout&&Blockly.utils.addClass(this.iconGroup_,"blocklyIconGroupReadonly"),this.drawIcon_(this.iconGroup_),this.block_.getSvgRoot().appendChild(this.iconGroup_),Blockly.bindEventWithChecks_(this.iconGroup_,"mouseup",this,this.iconClick_),this.updateEditable())};
 Blockly.Icon.prototype.dispose=function(){Blockly.utils.removeNode(this.iconGroup_);this.iconGroup_=null;this.setVisible(!1);this.block_=null};Blockly.Icon.prototype.updateEditable=function(){};Blockly.Icon.prototype.isVisible=function(){return!!this.bubble_};Blockly.Icon.prototype.iconClick_=function(a){this.block_.workspace.isDragging()||this.block_.isInFlyout||Blockly.utils.isRightButton(a)||this.setVisible(!this.isVisible())};Blockly.Icon.prototype.updateColour=function(){this.isVisible()&&this.bubble_.setColour(this.block_.getColour())};
-Blockly.Icon.prototype.renderIcon=function(a){if(this.collapseHidden&&this.block_.isCollapsed())return this.iconGroup_.setAttribute("display","none"),a;this.iconGroup_.setAttribute("display","block");var b=this.SIZE;this.block_.RTL&&(a-=b);this.iconGroup_.setAttribute("transform","translate("+a+",5)");this.computeIconLocation();return a=this.block_.RTL?a-Blockly.BlockSvg.SEP_SPACE_X:a+(b+Blockly.BlockSvg.SEP_SPACE_X)};
+Blockly.Icon.prototype.renderIcon=function(a){if(this.collapseHidden&&this.block_.isCollapsed()||this.block_.isInsertionMarker())return this.iconGroup_.setAttribute("display","none"),a;this.iconGroup_.setAttribute("display","block");var b=this.SIZE;this.block_.RTL&&(a-=b);this.iconGroup_.setAttribute("transform","translate("+a+",5)");this.computeIconLocation();return a=this.block_.RTL?a-Blockly.BlockSvg.SEP_SPACE_X:a+(b+Blockly.BlockSvg.SEP_SPACE_X)};
 Blockly.Icon.prototype.setIconLocation=function(a){this.iconXY_=a;this.isVisible()&&this.bubble_.setAnchorLocation(a)};Blockly.Icon.prototype.computeIconLocation=function(){var a=this.block_.getRelativeToSurfaceXY(),b=Blockly.utils.getRelativeXY(this.iconGroup_);a=new goog.math.Coordinate(a.x+b.x+this.SIZE/2,a.y+b.y+this.SIZE/2);goog.math.Coordinate.equals(this.getIconLocation(),a)||this.setIconLocation(a)};Blockly.Icon.prototype.getIconLocation=function(){return this.iconXY_};
 Blockly.Comment=function(a){Blockly.Comment.superClass_.constructor.call(this,a);this.createIcon()};goog.inherits(Blockly.Comment,Blockly.Icon);Blockly.Comment.prototype.text_="";Blockly.Comment.prototype.width_=160;Blockly.Comment.prototype.height_=80;
 Blockly.Comment.prototype.drawIcon_=function(a){Blockly.utils.createSvgElement("circle",{"class":"blocklyIconShape",r:"8",cx:"8",cy:"8"},a);Blockly.utils.createSvgElement("path",{"class":"blocklyIconSymbol",d:"m6.8,10h2c0.003,-0.617 0.271,-0.962 0.633,-1.266 2.875,-2.4050.607,-5.534 -3.765,-3.874v1.7c3.12,-1.657 3.698,0.118 2.336,1.25-1.201,0.998 -1.201,1.528 -1.204,2.19z"},a);Blockly.utils.createSvgElement("rect",{"class":"blocklyIconSymbol",x:"6.8",y:"10.78",height:"2",width:"2"},a)};
@@ -1042,8 +1049,9 @@ Blockly.Connection.prototype.canConnectWithReason_=function(a){if(!a)return Bloc
 Blockly.Connection.CAN_CONNECT:Blockly.Connection.REASON_CHECKS_FAILED};
 Blockly.Connection.prototype.checkConnection_=function(a){switch(this.canConnectWithReason_(a)){case Blockly.Connection.CAN_CONNECT:break;case Blockly.Connection.REASON_SELF_CONNECTION:throw Error("Attempted to connect a block to itself.");case Blockly.Connection.REASON_DIFFERENT_WORKSPACES:throw Error("Blocks not on same workspace.");case Blockly.Connection.REASON_WRONG_TYPE:throw Error("Attempt to connect incompatible types.");case Blockly.Connection.REASON_TARGET_NULL:throw Error("Target connection is null.");
 case Blockly.Connection.REASON_CHECKS_FAILED:throw Error("Connection checks failed. "+(this+" expected "+this.check_+", found "+a.check_));case Blockly.Connection.REASON_SHADOW_PARENT:throw Error("Connecting non-shadow to shadow block.");default:throw Error("Unknown connection failure: this should never happen!");}};
-Blockly.Connection.prototype.isConnectionAllowed=function(a){if(this.canConnectWithReason_(a)!=Blockly.Connection.CAN_CONNECT)return!1;switch(a.type){case Blockly.PREVIOUS_STATEMENT:if(a.isConnected()||this.isConnected())return!1;break;case Blockly.OUTPUT_VALUE:if(a.isConnected()||this.isConnected())return!1;break;case Blockly.INPUT_VALUE:if(a.targetConnection&&!a.targetBlock().isMovable()&&!a.targetBlock().isShadow())return!1;break;case Blockly.NEXT_STATEMENT:if(a.isConnected()&&!this.sourceBlock_.nextConnection&&
-!a.targetBlock().isShadow()&&a.targetBlock().nextConnection)return!1;break;default:throw Error("Unknown connection type in isConnectionAllowed");}return-1!=Blockly.draggingConnections_.indexOf(a)?!1:!0};Blockly.Connection.prototype.connect=function(a){this.targetConnection!=a&&(this.checkConnection_(a),this.isSuperior()?this.connect_(a):a.connect_(this))};
+Blockly.Connection.prototype.canConnectToPrevious_=function(a){if(this.targetConnection||-1!=Blockly.draggingConnections_.indexOf(a))return!1;if(!a.targetConnection)return!0;a=a.targetBlock();return a.isInsertionMarker()?!a.getPreviousBlock():!1};
+Blockly.Connection.prototype.isConnectionAllowed=function(a){if(a.sourceBlock_.isInsertionMarker()||this.canConnectWithReason_(a)!=Blockly.Connection.CAN_CONNECT)return!1;switch(a.type){case Blockly.PREVIOUS_STATEMENT:return this.canConnectToPrevious_(a);case Blockly.OUTPUT_VALUE:if(a.isConnected()||this.isConnected())return!1;break;case Blockly.INPUT_VALUE:if(a.isConnected()&&!a.targetBlock().isMovable()&&!a.targetBlock().isShadow())return!1;break;case Blockly.NEXT_STATEMENT:if(a.isConnected()&&
+!this.sourceBlock_.nextConnection&&!a.targetBlock().isShadow()&&a.targetBlock().nextConnection)return!1;break;default:throw Error("Unknown connection type in isConnectionAllowed");}return-1!=Blockly.draggingConnections_.indexOf(a)?!1:!0};Blockly.Connection.prototype.connect=function(a){this.targetConnection!=a&&(this.checkConnection_(a),this.isSuperior()?this.connect_(a):a.connect_(this))};
 Blockly.Connection.connectReciprocally_=function(a,b){if(!a||!b)throw Error("Cannot connect null connections.");a.targetConnection=b;b.targetConnection=a};Blockly.Connection.singleConnection_=function(a,b){for(var c=!1,d=0;d<a.inputList.length;d++){var e=a.inputList[d].connection;if(e&&e.type==Blockly.INPUT_VALUE&&b.outputConnection.checkType_(e)){if(c)return null;c=e}}return c};
 Blockly.Connection.lastConnectionInRow_=function(a,b){for(var c;c=Blockly.Connection.singleConnection_(a,b);)if(a=c.targetBlock(),!a||a.isShadow())return c;return null};
 Blockly.Connection.prototype.disconnect=function(){var a=this.targetConnection;if(!a)throw Error("Source connection not connected.");if(a.targetConnection!=this)throw Error("Target connection not connected to source connection.");if(this.isSuperior()){var b=this.sourceBlock_;var c=a.getSourceBlock();a=this}else b=a.getSourceBlock(),c=this.sourceBlock_;this.disconnectInternal_(b,c);a.respawnShadow_()};
@@ -1057,17 +1065,18 @@ Blockly.ConnectionDB.prototype.findConnection=function(a){if(!this.length)return
 Blockly.ConnectionDB.prototype.findPositionForConnection_=function(a){if(!this.length)return 0;for(var b=0,c=this.length;b<c;){var d=Math.floor((b+c)/2);if(this[d].y_<a.y_)b=d+1;else if(this[d].y_>a.y_)c=d;else{b=d;break}}return b};Blockly.ConnectionDB.prototype.removeConnection_=function(a){if(!a.inDB_)throw Error("Connection not in database.");var b=this.findConnection(a);if(-1==b)throw Error("Unable to find connection in connectionDB.");a.inDB_=!1;this.splice(b,1)};
 Blockly.ConnectionDB.prototype.getNeighbours=function(a,b){function c(a){var c=e-d[a].x_,g=f-d[a].y_;Math.sqrt(c*c+g*g)<=b&&k.push(d[a]);return g<b}var d=this,e=a.x_,f=a.y_;a=0;for(var g=d.length-2,h=g;a<h;)d[h].y_<f?a=h:g=h,h=Math.floor((a+g)/2);var k=[];g=a=h;if(d.length){for(;0<=a&&c(a);)a--;do g++;while(g<d.length&&c(g))}return k};Blockly.ConnectionDB.prototype.isInYRange_=function(a,b,c){return Math.abs(this[a].y_-b)<=c};
 Blockly.ConnectionDB.prototype.searchForClosest=function(a,b,c){if(!this.length)return{connection:null,radius:b};var d=a.y_,e=a.x_;a.x_=e+c.x;a.y_=d+c.y;var f=this.findPositionForConnection_(a);c=null;for(var g=b,h,k=f-1;0<=k&&this.isInYRange_(k,a.y_,b);)h=this[k],a.isConnectionAllowed(h,g)&&(c=h,g=h.distanceFrom(a)),k--;for(;f<this.length&&this.isInYRange_(f,a.y_,b);)h=this[f],a.isConnectionAllowed(h,g)&&(c=h,g=h.distanceFrom(a)),f++;a.x_=e;a.y_=d;return{connection:c,radius:g}};
-Blockly.ConnectionDB.init=function(a){var b=[];b[Blockly.INPUT_VALUE]=new Blockly.ConnectionDB;b[Blockly.OUTPUT_VALUE]=new Blockly.ConnectionDB;b[Blockly.NEXT_STATEMENT]=new Blockly.ConnectionDB;b[Blockly.PREVIOUS_STATEMENT]=new Blockly.ConnectionDB;a.connectionDBList=b};Blockly.constants={};Blockly.DRAG_RADIUS=5;Blockly.FLYOUT_DRAG_RADIUS=10;Blockly.SNAP_RADIUS=20;Blockly.BUMP_DELAY=250;Blockly.COLLAPSE_CHARS=30;Blockly.LONGPRESS=750;Blockly.SOUND_LIMIT=100;Blockly.DRAG_STACK=!0;Blockly.HSV_SATURATION=.45;Blockly.HSV_VALUE=.65;Blockly.SPRITE={width:96,height:124,url:"sprites.png"};Blockly.SVG_NS="http://www.w3.org/2000/svg";Blockly.HTML_NS="http://www.w3.org/1999/xhtml";Blockly.INPUT_VALUE=1;Blockly.OUTPUT_VALUE=2;Blockly.NEXT_STATEMENT=3;
-Blockly.PREVIOUS_STATEMENT=4;Blockly.DUMMY_INPUT=5;Blockly.ALIGN_LEFT=-1;Blockly.ALIGN_CENTRE=0;Blockly.ALIGN_RIGHT=1;Blockly.DRAG_NONE=0;Blockly.DRAG_STICKY=1;Blockly.DRAG_BEGIN=1;Blockly.DRAG_FREE=2;Blockly.OPPOSITE_TYPE=[];Blockly.OPPOSITE_TYPE[Blockly.INPUT_VALUE]=Blockly.OUTPUT_VALUE;Blockly.OPPOSITE_TYPE[Blockly.OUTPUT_VALUE]=Blockly.INPUT_VALUE;Blockly.OPPOSITE_TYPE[Blockly.NEXT_STATEMENT]=Blockly.PREVIOUS_STATEMENT;Blockly.OPPOSITE_TYPE[Blockly.PREVIOUS_STATEMENT]=Blockly.NEXT_STATEMENT;
-Blockly.TOOLBOX_AT_TOP=0;Blockly.TOOLBOX_AT_BOTTOM=1;Blockly.TOOLBOX_AT_LEFT=2;Blockly.TOOLBOX_AT_RIGHT=3;Blockly.DELETE_AREA_NONE=null;Blockly.DELETE_AREA_TRASH=1;Blockly.DELETE_AREA_TOOLBOX=2;Blockly.VARIABLE_CATEGORY_NAME="VARIABLE";Blockly.VARIABLE_DYNAMIC_CATEGORY_NAME="VARIABLE_DYNAMIC";Blockly.PROCEDURE_CATEGORY_NAME="PROCEDURE";Blockly.RENAME_VARIABLE_ID="RENAME_VARIABLE_ID";Blockly.DELETE_VARIABLE_ID="DELETE_VARIABLE_ID";Blockly.BlockAnimations={};Blockly.BlockAnimations.disconnectPid_=0;Blockly.BlockAnimations.disconnectGroup_=null;Blockly.BlockAnimations.disposeUiEffect=function(a){var b=a.workspace,c=a.getSvgRoot();b.getAudioManager().play("delete");a=b.getSvgXY(c);c=c.cloneNode(!0);c.translateX_=a.x;c.translateY_=a.y;c.setAttribute("transform","translate("+a.x+","+a.y+")");b.getParentSvg().appendChild(c);c.bBox_=c.getBBox();Blockly.BlockAnimations.disposeUiStep_(c,b.RTL,new Date,b.scale)};
+Blockly.ConnectionDB.init=function(a){var b=[];b[Blockly.INPUT_VALUE]=new Blockly.ConnectionDB;b[Blockly.OUTPUT_VALUE]=new Blockly.ConnectionDB;b[Blockly.NEXT_STATEMENT]=new Blockly.ConnectionDB;b[Blockly.PREVIOUS_STATEMENT]=new Blockly.ConnectionDB;a.connectionDBList=b};Blockly.constants={};Blockly.DRAG_RADIUS=5;Blockly.FLYOUT_DRAG_RADIUS=10;Blockly.SNAP_RADIUS=28;Blockly.CONNECTING_SNAP_RADIUS=Blockly.SNAP_RADIUS;Blockly.CURRENT_CONNECTION_PREFERENCE=8;Blockly.INSERTION_MARKER_COLOUR="#000000";Blockly.BUMP_DELAY=250;Blockly.BUMP_RANDOMNESS=10;Blockly.COLLAPSE_CHARS=30;Blockly.LONGPRESS=750;Blockly.SOUND_LIMIT=100;Blockly.DRAG_STACK=!0;Blockly.HSV_SATURATION=.45;Blockly.HSV_VALUE=.65;Blockly.SPRITE={width:96,height:124,url:"sprites.png"};Blockly.SVG_NS="http://www.w3.org/2000/svg";
+Blockly.HTML_NS="http://www.w3.org/1999/xhtml";Blockly.INPUT_VALUE=1;Blockly.OUTPUT_VALUE=2;Blockly.NEXT_STATEMENT=3;Blockly.PREVIOUS_STATEMENT=4;Blockly.DUMMY_INPUT=5;Blockly.ALIGN_LEFT=-1;Blockly.ALIGN_CENTRE=0;Blockly.ALIGN_RIGHT=1;Blockly.DRAG_NONE=0;Blockly.DRAG_STICKY=1;Blockly.DRAG_BEGIN=1;Blockly.DRAG_FREE=2;Blockly.OPPOSITE_TYPE=[];Blockly.OPPOSITE_TYPE[Blockly.INPUT_VALUE]=Blockly.OUTPUT_VALUE;Blockly.OPPOSITE_TYPE[Blockly.OUTPUT_VALUE]=Blockly.INPUT_VALUE;
+Blockly.OPPOSITE_TYPE[Blockly.NEXT_STATEMENT]=Blockly.PREVIOUS_STATEMENT;Blockly.OPPOSITE_TYPE[Blockly.PREVIOUS_STATEMENT]=Blockly.NEXT_STATEMENT;Blockly.TOOLBOX_AT_TOP=0;Blockly.TOOLBOX_AT_BOTTOM=1;Blockly.TOOLBOX_AT_LEFT=2;Blockly.TOOLBOX_AT_RIGHT=3;Blockly.DELETE_AREA_NONE=null;Blockly.DELETE_AREA_TRASH=1;Blockly.DELETE_AREA_TOOLBOX=2;Blockly.VARIABLE_CATEGORY_NAME="VARIABLE";Blockly.VARIABLE_DYNAMIC_CATEGORY_NAME="VARIABLE_DYNAMIC";Blockly.PROCEDURE_CATEGORY_NAME="PROCEDURE";
+Blockly.RENAME_VARIABLE_ID="RENAME_VARIABLE_ID";Blockly.DELETE_VARIABLE_ID="DELETE_VARIABLE_ID";Blockly.BlockAnimations={};Blockly.BlockAnimations.disconnectPid_=0;Blockly.BlockAnimations.disconnectGroup_=null;Blockly.BlockAnimations.disposeUiEffect=function(a){var b=a.workspace,c=a.getSvgRoot();b.getAudioManager().play("delete");a=b.getSvgXY(c);c=c.cloneNode(!0);c.translateX_=a.x;c.translateY_=a.y;c.setAttribute("transform","translate("+a.x+","+a.y+")");b.getParentSvg().appendChild(c);c.bBox_=c.getBBox();Blockly.BlockAnimations.disposeUiStep_(c,b.RTL,new Date,b.scale)};
 Blockly.BlockAnimations.disposeUiStep_=function(a,b,c,d){var e=(new Date-c)/150;1<e?Blockly.utils.removeNode(a):(a.setAttribute("transform","translate("+(a.translateX_+(b?-1:1)*a.bBox_.width*d/2*e)+","+(a.translateY_+a.bBox_.height*d*e)+") scale("+(1-e)*d+")"),setTimeout(Blockly.BlockAnimations.disposeUiStep_,10,a,b,c,d))};
 Blockly.BlockAnimations.connectionUiEffect=function(a){var b=a.workspace,c=b.scale;b.getAudioManager().play("click");if(!(1>c)){var d=b.getSvgXY(a.getSvgRoot());a.outputConnection?(d.x+=(a.RTL?3:-3)*c,d.y+=13*c):a.previousConnection&&(d.x+=(a.RTL?-23:23)*c,d.y+=3*c);a=Blockly.utils.createSvgElement("circle",{cx:d.x,cy:d.y,r:0,fill:"none",stroke:"#888","stroke-width":10},b.getParentSvg());Blockly.BlockAnimations.connectionUiStep_(a,new Date,c)}};
 Blockly.BlockAnimations.connectionUiStep_=function(a,b,c){var d=(new Date-b)/150;1<d?Blockly.utils.removeNode(a):(a.setAttribute("r",25*d*c),a.style.opacity=1-d,Blockly.BlockAnimations.disconnectPid_=setTimeout(Blockly.BlockAnimations.connectionUiStep_,10,a,b,c))};
 Blockly.BlockAnimations.disconnectUiEffect=function(a){a.workspace.getAudioManager().play("disconnect");if(!(1>a.workspace.scale)){var b=a.getHeightWidth().height;b=Math.atan(10/b)/Math.PI*180;a.RTL||(b*=-1);Blockly.BlockAnimations.disconnectUiStep_(a.getSvgRoot(),b,new Date)}};
 Blockly.BlockAnimations.disconnectUiStep_=function(a,b,c){var d=(new Date-c)/200;1<d?a.skew_="":(a.skew_="skewX("+Math.round(Math.sin(d*Math.PI*3)*(1-d)*b)+")",Blockly.BlockAnimations.disconnectGroup_=a,Blockly.BlockAnimations.disconnectPid_=setTimeout(Blockly.BlockAnimations.disconnectUiStep_,10,a,b,c));a.setAttribute("transform",a.translate_+a.skew_)};
 Blockly.BlockAnimations.disconnectUiStop=function(){if(Blockly.BlockAnimations.disconnectGroup_){clearTimeout(Blockly.BlockAnimations.disconnectPid_);var a=Blockly.BlockAnimations.disconnectGroup_;a.skew_="";a.setAttribute("transform",a.translate_);Blockly.BlockAnimations.disconnectGroup_=null}};Blockly.RenderedConnection=function(a,b){Blockly.RenderedConnection.superClass_.constructor.call(this,a,b);this.offsetInBlock_=new goog.math.Coordinate(0,0)};goog.inherits(Blockly.RenderedConnection,Blockly.Connection);Blockly.RenderedConnection.prototype.distanceFrom=function(a){var b=this.x_-a.x_;a=this.y_-a.y_;return Math.sqrt(b*b+a*a)};
-Blockly.RenderedConnection.prototype.bumpAwayFrom_=function(a){if(!this.sourceBlock_.workspace.isDragging()){var b=this.sourceBlock_.getRootBlock();if(!b.isInFlyout){var c=!1;if(!b.isMovable()){b=a.getSourceBlock().getRootBlock();if(!b.isMovable())return;a=this;c=!0}var d=Blockly.selected==b;d||b.addSelect();var e=a.x_+Blockly.SNAP_RADIUS-this.x_;a=a.y_+Blockly.SNAP_RADIUS-this.y_;c&&(a=-a);b.RTL&&(e=-e);b.moveBy(e,a);d||b.removeSelect()}}};
-Blockly.RenderedConnection.prototype.moveTo=function(a,b){this.inDB_&&this.db_.removeConnection_(this);this.x_=a;this.y_=b;this.hidden_||this.db_.addConnection(this)};Blockly.RenderedConnection.prototype.moveBy=function(a,b){this.moveTo(this.x_+a,this.y_+b)};Blockly.RenderedConnection.prototype.moveToOffset=function(a){this.moveTo(a.x+this.offsetInBlock_.x,a.y+this.offsetInBlock_.y)};
+Blockly.RenderedConnection.prototype.bumpAwayFrom_=function(a){if(!this.sourceBlock_.workspace.isDragging()){var b=this.sourceBlock_.getRootBlock();if(!b.isInFlyout){var c=!1;if(!b.isMovable()){b=a.getSourceBlock().getRootBlock();if(!b.isMovable())return;a=this;c=!0}var d=Blockly.selected==b;d||b.addSelect();var e=a.x_+Blockly.SNAP_RADIUS+Math.floor(Math.random()*Blockly.BUMP_RANDOMNESS)-this.x_;a=a.y_+Blockly.SNAP_RADIUS+Math.floor(Math.random()*Blockly.BUMP_RANDOMNESS)-this.y_;c&&(a=-a);b.RTL&&
+(e=-e);b.moveBy(e,a);d||b.removeSelect()}}};Blockly.RenderedConnection.prototype.moveTo=function(a,b){this.inDB_&&this.db_.removeConnection_(this);this.x_=a;this.y_=b;this.hidden_||this.db_.addConnection(this)};Blockly.RenderedConnection.prototype.moveBy=function(a,b){this.moveTo(this.x_+a,this.y_+b)};Blockly.RenderedConnection.prototype.moveToOffset=function(a){this.moveTo(a.x+this.offsetInBlock_.x,a.y+this.offsetInBlock_.y)};
 Blockly.RenderedConnection.prototype.setOffsetInBlock=function(a,b){this.offsetInBlock_.x=a;this.offsetInBlock_.y=b};Blockly.RenderedConnection.prototype.tighten_=function(){var a=this.targetConnection.x_-this.x_,b=this.targetConnection.y_-this.y_;if(0!=a||0!=b){var c=this.targetBlock(),d=c.getSvgRoot();if(!d)throw Error("block is not rendered.");d=Blockly.utils.getRelativeXY(d);c.getSvgRoot().setAttribute("transform","translate("+(d.x-a)+","+(d.y-b)+")");c.moveConnections_(-a,-b)}};
 Blockly.RenderedConnection.prototype.closest=function(a,b){return this.dbOpposite_.searchForClosest(this,a,b)};
 Blockly.RenderedConnection.prototype.highlight=function(){var a=this.type==Blockly.INPUT_VALUE||this.type==Blockly.OUTPUT_VALUE?"m 0,0 "+Blockly.BlockSvg.TAB_PATH_DOWN+" v 5":"m -20,0 h 5 "+Blockly.BlockSvg.NOTCH_PATH_LEFT+" h 5";var b=this.sourceBlock_.getRelativeToSurfaceXY();Blockly.Connection.highlightedPath_=Blockly.utils.createSvgElement("path",{"class":"blocklyHighlightedConnectionPath",d:a,transform:"translate("+(this.x_-b.x)+","+(this.y_-b.y)+")"+(this.sourceBlock_.RTL?" scale(-1 1)":"")},
@@ -1085,11 +1094,11 @@ Blockly.DraggedConnectionManager.prototype.update=function(a,b){var c=this.close
 Blockly.DraggedConnectionManager.prototype.removeHighlighting_=function(){this.closestConnection_&&this.closestConnection_.unhighlight()};Blockly.DraggedConnectionManager.prototype.addHighlighting_=function(){this.closestConnection_&&this.closestConnection_.highlight()};Blockly.DraggedConnectionManager.prototype.initAvailableConnections_=function(){var a=this.topBlock_.getConnections_(!1),b=this.topBlock_.lastConnectionInStack();b&&b!=this.topBlock_.nextConnection&&a.push(b);return a};
 Blockly.DraggedConnectionManager.prototype.updateClosest_=function(a){var b=this.closestConnection_;this.localConnection_=this.closestConnection_=null;this.radiusConnection_=Blockly.SNAP_RADIUS;for(var c=0;c<this.availableConnections_.length;c++){var d=this.availableConnections_[c],e=d.closest(this.radiusConnection_,a);e.connection&&(this.closestConnection_=e.connection,this.localConnection_=d,this.radiusConnection_=e.radius)}return b!=this.closestConnection_};Blockly.BlockDragger=function(a,b){this.draggingBlock_=a;this.workspace_=b;this.draggedConnectionManager_=new Blockly.DraggedConnectionManager(this.draggingBlock_);this.deleteArea_=null;this.wouldDeleteBlock_=!1;this.startXY_=this.draggingBlock_.getRelativeToSurfaceXY();this.dragIconData_=Blockly.BlockDragger.initIconData_(a)};
 Blockly.BlockDragger.prototype.dispose=function(){this.startWorkspace_=this.workspace_=this.draggingBlock_=null;this.dragIconData_.length=0;this.draggedConnectionManager_&&(this.draggedConnectionManager_.dispose(),this.draggedConnectionManager_=null)};Blockly.BlockDragger.initIconData_=function(a){var b=[];a=a.getDescendants(!1);for(var c=0,d;d=a[c];c++){d=d.getIcons();for(var e=0;e<d.length;e++){var f={location:d[e].getIconLocation(),icon:d[e]};b.push(f)}}return b};
-Blockly.BlockDragger.prototype.startBlockDrag=function(a,b){Blockly.Events.getGroup()||Blockly.Events.setGroup(!0);this.workspace_.isMutator&&this.draggingBlock_.bringToFront();this.workspace_.setResizesEnabled(!1);Blockly.BlockAnimations.disconnectUiStop();if(this.draggingBlock_.getParent()||b&&this.draggingBlock_.nextConnection&&this.draggingBlock_.nextConnection.targetBlock())this.draggingBlock_.unplug(b),a=this.pixelsToWorkspaceUnits_(a),a=goog.math.Coordinate.sum(this.startXY_,a),this.draggingBlock_.translate(a.x,
-a.y),Blockly.BlockAnimations.disconnectUiEffect(this.draggingBlock_);this.draggingBlock_.setDragging(!0);this.draggingBlock_.moveToDragSurface_();if(a=this.workspace_.getToolbox())b=this.draggingBlock_.isDeletable()?"blocklyToolboxDelete":"blocklyToolboxGrab",a.addStyle(b)};
+Blockly.BlockDragger.prototype.startBlockDrag=function(a,b){Blockly.Events.getGroup()||Blockly.Events.setGroup(!0);this.workspace_.isMutator&&this.draggingBlock_.bringToFront();Blockly.Field.startCache();this.workspace_.setResizesEnabled(!1);Blockly.BlockAnimations.disconnectUiStop();if(this.draggingBlock_.getParent()||b&&this.draggingBlock_.nextConnection&&this.draggingBlock_.nextConnection.targetBlock())this.draggingBlock_.unplug(b),a=this.pixelsToWorkspaceUnits_(a),a=goog.math.Coordinate.sum(this.startXY_,
+a),this.draggingBlock_.translate(a.x,a.y),Blockly.BlockAnimations.disconnectUiEffect(this.draggingBlock_);this.draggingBlock_.setDragging(!0);this.draggingBlock_.moveToDragSurface_();if(a=this.workspace_.getToolbox())b=this.draggingBlock_.isDeletable()?"blocklyToolboxDelete":"blocklyToolboxGrab",a.addStyle(b)};
 Blockly.BlockDragger.prototype.dragBlock=function(a,b){b=this.pixelsToWorkspaceUnits_(b);var c=goog.math.Coordinate.sum(this.startXY_,b);this.draggingBlock_.moveDuringDrag(c);this.dragIcons_(b);this.deleteArea_=this.workspace_.isDeleteArea(a);this.draggedConnectionManager_.update(b,this.deleteArea_);this.updateCursorDuringBlockDrag_()};
-Blockly.BlockDragger.prototype.endBlockDrag=function(a,b){this.dragBlock(a,b);this.dragIconData_=[];Blockly.BlockAnimations.disconnectUiStop();a=this.pixelsToWorkspaceUnits_(b);b=goog.math.Coordinate.sum(this.startXY_,a);this.draggingBlock_.moveOffDragSurface_(b);this.maybeDeleteBlock_()||(this.draggingBlock_.moveConnections_(a.x,a.y),this.draggingBlock_.setDragging(!1),this.fireMoveEvent_(),this.draggedConnectionManager_.wouldConnectBlock()?this.draggedConnectionManager_.applyConnections():this.draggingBlock_.render(),
-this.draggingBlock_.scheduleSnapAndBump());this.workspace_.setResizesEnabled(!0);if(a=this.workspace_.getToolbox())b=this.draggingBlock_.isDeletable()?"blocklyToolboxDelete":"blocklyToolboxGrab",a.removeStyle(b);Blockly.Events.setGroup(!1)};Blockly.BlockDragger.prototype.fireMoveEvent_=function(){var a=new Blockly.Events.BlockMove(this.draggingBlock_);a.oldCoordinate=this.startXY_;a.recordNew();Blockly.Events.fire(a)};
+Blockly.BlockDragger.prototype.endBlockDrag=function(a,b){this.dragBlock(a,b);this.dragIconData_=[];Blockly.Field.stopCache();Blockly.BlockAnimations.disconnectUiStop();a=this.pixelsToWorkspaceUnits_(b);b=goog.math.Coordinate.sum(this.startXY_,a);this.draggingBlock_.moveOffDragSurface_(b);this.maybeDeleteBlock_()||(this.draggingBlock_.moveConnections_(a.x,a.y),this.draggingBlock_.setDragging(!1),this.fireMoveEvent_(),this.draggedConnectionManager_.wouldConnectBlock()?this.draggedConnectionManager_.applyConnections():
+this.draggingBlock_.render(),this.draggingBlock_.scheduleSnapAndBump());this.workspace_.setResizesEnabled(!0);if(a=this.workspace_.getToolbox())b=this.draggingBlock_.isDeletable()?"blocklyToolboxDelete":"blocklyToolboxGrab",a.removeStyle(b);Blockly.Events.setGroup(!1)};Blockly.BlockDragger.prototype.fireMoveEvent_=function(){var a=new Blockly.Events.BlockMove(this.draggingBlock_);a.oldCoordinate=this.startXY_;a.recordNew();Blockly.Events.fire(a)};
 Blockly.BlockDragger.prototype.maybeDeleteBlock_=function(){var a=this.workspace_.trashcan;this.wouldDeleteBlock_?(a&&setTimeout(a.close.bind(a),100),this.fireMoveEvent_(),this.draggingBlock_.dispose(!1,!0)):a&&a.close();return this.wouldDeleteBlock_};
 Blockly.BlockDragger.prototype.updateCursorDuringBlockDrag_=function(){this.wouldDeleteBlock_=this.draggedConnectionManager_.wouldDeleteBlock();var a=this.workspace_.trashcan;this.wouldDeleteBlock_?(this.draggingBlock_.setDeleteStyle(!0),this.deleteArea_==Blockly.DELETE_AREA_TRASH&&a&&a.setOpen_(!0)):(this.draggingBlock_.setDeleteStyle(!1),a&&a.setOpen_(!1))};
 Blockly.BlockDragger.prototype.pixelsToWorkspaceUnits_=function(a){a=new goog.math.Coordinate(a.x/this.workspace_.scale,a.y/this.workspace_.scale);this.workspace_.isMutator&&(a=a.scale(1/this.workspace_.options.parentWorkspace.scale));return a};Blockly.BlockDragger.prototype.dragIcons_=function(a){for(var b=0;b<this.dragIconData_.length;b++){var c=this.dragIconData_[b];c.icon.setIconLocation(goog.math.Coordinate.sum(c.location,a))}};Blockly.WorkspaceCommentSvg=function(a,b,c,d,e){this.svgGroup_=Blockly.utils.createSvgElement("g",{"class":"blocklyComment"},null);this.svgGroup_.translate_="";this.svgRect_=Blockly.utils.createSvgElement("rect",{"class":"blocklyCommentRect",x:0,y:0,rx:Blockly.WorkspaceCommentSvg.BORDER_RADIUS,ry:Blockly.WorkspaceCommentSvg.BORDER_RADIUS});this.svgGroup_.appendChild(this.svgRect_);this.rendered_=!1;this.useDragSurface_=Blockly.utils.is3dSupported()&&!!a.blockDragSurface_;Blockly.WorkspaceCommentSvg.superClass_.constructor.call(this,
@@ -1155,8 +1164,8 @@ Blockly.Gesture.prototype.isWorkspaceClick_=function(){return!this.startBlock_&&
 Blockly.Grid.prototype.update=function(a){this.scale_=a;var b=this.spacing_*a||100;this.gridPattern_.setAttribute("width",b);this.gridPattern_.setAttribute("height",b);b=Math.floor(this.spacing_/2)+.5;var c=b-this.length_/2,d=b+this.length_/2;b*=a;c*=a;d*=a;this.setLineAttributes_(this.line1_,a,c,d,b,b);this.setLineAttributes_(this.line2_,a,b,b,c,d)};
 Blockly.Grid.prototype.setLineAttributes_=function(a,b,c,d,e,f){a&&(a.setAttribute("stroke-width",b),a.setAttribute("x1",c),a.setAttribute("y1",e),a.setAttribute("x2",d),a.setAttribute("y2",f))};Blockly.Grid.prototype.moveTo=function(a,b){this.gridPattern_.setAttribute("x",a);this.gridPattern_.setAttribute("y",b);(goog.userAgent.IE||goog.userAgent.EDGE)&&this.update(this.scale_)};
 Blockly.Grid.createDom=function(a,b,c){a=Blockly.utils.createSvgElement("pattern",{id:"blocklyGridPattern"+a,patternUnits:"userSpaceOnUse"},c);0<b.length&&0<b.spacing?(Blockly.utils.createSvgElement("line",{stroke:b.colour},a),1<b.length&&Blockly.utils.createSvgElement("line",{stroke:b.colour},a)):Blockly.utils.createSvgElement("line",{},a);return a};Blockly.Options=function(a){var b=!!a.readOnly;if(b)var c=null,d=!1,e=!1,f=!1,g=!1,h=!1,k=!1;else c=Blockly.Options.parseToolboxTree(a.toolbox),d=!(!c||!c.getElementsByTagName("category").length),e=a.trashcan,void 0===e&&(e=d),f=a.collapse,void 0===f&&(f=d),g=a.comments,void 0===g&&(g=d),h=a.disable,void 0===h&&(h=d),k=a.sounds,void 0===k&&(k=!0);var l=!!a.rtl,n=a.horizontalLayout;void 0===n&&(n=!1);var m=a.toolboxPosition;m="end"===m?!1:!0;m=n?m?Blockly.TOOLBOX_AT_TOP:Blockly.TOOLBOX_AT_BOTTOM:m==
-l?Blockly.TOOLBOX_AT_RIGHT:Blockly.TOOLBOX_AT_LEFT;var p=a.scrollbars;void 0===p&&(p=d);var q=a.css;void 0===q&&(q=!0);var t="https://blockly-demo.appspot.com/static/media/";a.media?t=a.media:a.path&&(t=a.path+"media/");var r=void 0===a.oneBasedIndex?!0:!!a.oneBasedIndex;this.RTL=l;this.oneBasedIndex=r;this.collapse=f;this.comments=g;this.disable=h;this.readOnly=b;this.maxBlocks=a.maxBlocks||Infinity;this.pathToMedia=t;this.hasCategories=d;this.hasScrollbars=p;this.hasTrashcan=e;this.hasSounds=k;
-this.hasCss=q;this.horizontalLayout=n;this.languageTree=c;this.gridOptions=Blockly.Options.parseGridOptions_(a);this.zoomOptions=Blockly.Options.parseZoomOptions_(a);this.toolboxPosition=m};Blockly.Options.prototype.parentWorkspace=null;Blockly.Options.prototype.setMetrics=null;Blockly.Options.prototype.getMetrics=null;
+l?Blockly.TOOLBOX_AT_RIGHT:Blockly.TOOLBOX_AT_LEFT;var p=a.scrollbars;void 0===p&&(p=d);var q=a.css;void 0===q&&(q=!0);var r="https://blockly-demo.appspot.com/static/media/";a.media?r=a.media:a.path&&(r=a.path+"media/");var t=void 0===a.oneBasedIndex?!0:!!a.oneBasedIndex;this.RTL=l;this.oneBasedIndex=t;this.collapse=f;this.comments=g;this.disable=h;this.readOnly=b;this.maxBlocks=a.maxBlocks||Infinity;this.maxInstances=a.maxInstances;this.pathToMedia=r;this.hasCategories=d;this.hasScrollbars=p;this.hasTrashcan=
+e;this.hasSounds=k;this.hasCss=q;this.horizontalLayout=n;this.languageTree=c;this.gridOptions=Blockly.Options.parseGridOptions_(a);this.zoomOptions=Blockly.Options.parseZoomOptions_(a);this.toolboxPosition=m};Blockly.Options.prototype.parentWorkspace=null;Blockly.Options.prototype.setMetrics=null;Blockly.Options.prototype.getMetrics=null;
 Blockly.Options.parseZoomOptions_=function(a){a=a.zoom||{};var b={};b.controls=void 0===a.controls?!1:!!a.controls;b.wheel=void 0===a.wheel?!1:!!a.wheel;b.startScale=void 0===a.startScale?1:parseFloat(a.startScale);b.maxScale=void 0===a.maxScale?3:parseFloat(a.maxScale);b.minScale=void 0===a.minScale?.3:parseFloat(a.minScale);b.scaleSpeed=void 0===a.scaleSpeed?1.2:parseFloat(a.scaleSpeed);return b};
 Blockly.Options.parseGridOptions_=function(a){a=a.grid||{};var b={};b.spacing=parseFloat(a.spacing)||0;b.colour=a.colour||"#888";b.length=parseFloat(a.length)||1;b.snap=0<b.spacing&&!!a.snap;return b};Blockly.Options.parseToolboxTree=function(a){a?("string"!=typeof a&&("undefined"==typeof XSLTProcessor&&a.outerHTML?a=a.outerHTML:a instanceof Element||(a=null)),"string"==typeof a&&(a=Blockly.Xml.textToDom(a))):a=null;return a};Blockly.ScrollbarPair=function(a){this.workspace_=a;this.hScroll=new Blockly.Scrollbar(a,!0,!0,"blocklyMainWorkspaceScrollbar");this.vScroll=new Blockly.Scrollbar(a,!1,!0,"blocklyMainWorkspaceScrollbar");this.corner_=Blockly.utils.createSvgElement("rect",{height:Blockly.Scrollbar.scrollbarThickness,width:Blockly.Scrollbar.scrollbarThickness,"class":"blocklyScrollbarBackground"},null);Blockly.utils.insertAfter(this.corner_,a.getBubbleCanvas())};Blockly.ScrollbarPair.prototype.oldHostMetrics_=null;
 Blockly.ScrollbarPair.prototype.dispose=function(){Blockly.utils.removeNode(this.corner_);this.oldHostMetrics_=this.workspace_=this.corner_=null;this.hScroll.dispose();this.hScroll=null;this.vScroll.dispose();this.vScroll=null};
@@ -1213,13 +1222,13 @@ Blockly.Variables.renameVariable=function(a,b,c){var d=function(e){var f=Blockly
 Blockly.Variables.promptName=function(a,b,c){Blockly.prompt(a,b,function(a){a&&(a=a.replace(/[\s\xa0]+/g," ").replace(/^ | $/g,""),a==Blockly.Msg.RENAME_VARIABLE||a==Blockly.Msg.NEW_VARIABLE)&&(a=null);c(a)})};Blockly.Variables.nameUsedWithOtherType_=function(a,b,c){c=c.getVariableMap().getAllVariables();a=a.toLowerCase();for(var d=0,e;e=c[d];d++)if(e.name.toLowerCase()==a&&e.type!=b)return e;return null};
 Blockly.Variables.nameUsedWithAnyType_=function(a,b){b=b.getVariableMap().getAllVariables();a=a.toLowerCase();for(var c=0,d;d=b[c];c++)if(d.name.toLowerCase()==a)return d;return null};Blockly.Variables.generateVariableFieldXmlString=function(a){var b=a.type;""==b&&(b="''");return'<field name="VAR" id="'+a.getId()+'" variabletype="'+goog.string.htmlEscape(b)+'">'+goog.string.htmlEscape(a.name)+"</field>"};
 Blockly.Variables.generateVariableFieldDom=function(a){a=Blockly.Variables.generateVariableFieldXmlString(a);return Blockly.Xml.textToDom("<xml>"+a+"</xml>").firstChild};Blockly.Variables.getOrCreateVariablePackage=function(a,b,c,d){var e=Blockly.Variables.getVariable(a,b,c,d);e||(e=Blockly.Variables.createVariable_(a,b,c,d));return e};
-Blockly.Variables.getVariable=function(a,b,c,d){var e=a.getPotentialVariableMap();if(b){var f=a.getVariableById(b);!f&&e&&(f=e.getVariableById(b))}else if(c){if(void 0==d)throw Error("Tried to look up a variable by name without a type");f=a.getVariable(c,d);!f&&e&&(f=e.getVariable(c,d))}return f};
+Blockly.Variables.getVariable=function(a,b,c,d){var e=a.getPotentialVariableMap();if(b){var f=a.getVariableById(b);!f&&e&&(f=e.getVariableById(b));if(f)return f}if(c){if(void 0==d)throw Error("Tried to look up a variable by name without a type");f=a.getVariable(c,d);!f&&e&&(f=e.getVariable(c,d))}return f};
 Blockly.Variables.createVariable_=function(a,b,c,d){var e=a.getPotentialVariableMap();c||(c=Blockly.Variables.generateUniqueName(a.isFlyout?a.targetWorkspace:a));return e?e.createVariable(c,d,b):a.createVariable(c,d,b)};Blockly.Variables.getAddedVariables=function(a,b){a=a.getAllVariables();var c=[];if(b.length!=a.length)for(var d=0;d<a.length;d++){var e=a[d];-1==b.indexOf(e)&&c.push(e)}return c};Blockly.VariablesDynamic={};Blockly.VariablesDynamic.onCreateVariableButtonClick_String=function(a){Blockly.Variables.createVariableButtonHandler(a.getTargetWorkspace(),null,"String")};Blockly.VariablesDynamic.onCreateVariableButtonClick_Number=function(a){Blockly.Variables.createVariableButtonHandler(a.getTargetWorkspace(),null,"Number")};Blockly.VariablesDynamic.onCreateVariableButtonClick_Colour=function(a){Blockly.Variables.createVariableButtonHandler(a.getTargetWorkspace(),null,"Colour")};
 Blockly.VariablesDynamic.flyoutCategory=function(a){var b=[],c=document.createElement("button");c.setAttribute("text",Blockly.Msg.NEW_STRING_VARIABLE);c.setAttribute("callbackKey","CREATE_VARIABLE_STRING");b.push(c);c=document.createElement("button");c.setAttribute("text",Blockly.Msg.NEW_NUMBER_VARIABLE);c.setAttribute("callbackKey","CREATE_VARIABLE_NUMBER");b.push(c);c=document.createElement("button");c.setAttribute("text",Blockly.Msg.NEW_COLOUR_VARIABLE);c.setAttribute("callbackKey","CREATE_VARIABLE_COLOUR");
 b.push(c);a.registerButtonCallback("CREATE_VARIABLE_STRING",Blockly.VariablesDynamic.onCreateVariableButtonClick_String);a.registerButtonCallback("CREATE_VARIABLE_NUMBER",Blockly.VariablesDynamic.onCreateVariableButtonClick_Number);a.registerButtonCallback("CREATE_VARIABLE_COLOUR",Blockly.VariablesDynamic.onCreateVariableButtonClick_Colour);a=Blockly.VariablesDynamic.flyoutCategoryBlocks(a);return b=b.concat(a)};
 Blockly.VariablesDynamic.flyoutCategoryBlocks=function(a){a=a.getAllVariables();a.sort(Blockly.VariableModel.compareByName);var b=[];if(0<a.length){if(Blockly.Blocks.variables_set_dynamic){var c='<xml><block type="variables_set_dynamic" gap="24">'+Blockly.Variables.generateVariableFieldXmlString(a[0])+"</block></xml>";c=Blockly.Xml.textToDom(c).firstChild;b.push(c)}if(Blockly.Blocks.variables_get_dynamic)for(var d=0;c=a[d];d++)c='<xml><block type="variables_get_dynamic" gap="8">'+Blockly.Variables.generateVariableFieldXmlString(c)+
 "</block></xml>",c=Blockly.Xml.textToDom(c).firstChild,b.push(c)}return b};Blockly.WorkspaceAudio=function(a){this.parentWorkspace_=a;this.SOUNDS_=Object.create(null)};Blockly.WorkspaceAudio.prototype.lastSound_=null;Blockly.WorkspaceAudio.prototype.dispose=function(){this.SOUNDS_=this.parentWorkspace_=null};Blockly.WorkspaceAudio.prototype.load=function(a,b){if(a.length){try{var c=new window.Audio}catch(h){return}for(var d,e=0;e<a.length;e++){var f=a[e],g=f.match(/\.(\w+)$/);if(g&&c.canPlayType("audio/"+g[1])){d=new window.Audio(f);break}}d&&d.play&&(this.SOUNDS_[b]=d)}};
-Blockly.WorkspaceAudio.prototype.preload=function(){for(var a in this.SOUNDS_){var b=this.SOUNDS_[a];b.volume=.01;b.play();b.pause();if(goog.userAgent.IPAD||goog.userAgent.IPHONE)break}};
+Blockly.WorkspaceAudio.prototype.preload=function(){for(var a in this.SOUNDS_){var b=this.SOUNDS_[a];b.volume=.01;b.play().catch(function(){});b.pause();if(goog.userAgent.IPAD||goog.userAgent.IPHONE)break}};
 Blockly.WorkspaceAudio.prototype.play=function(a,b){var c=this.SOUNDS_[a];c?(a=new Date,null!=this.lastSound_&&a-this.lastSound_<Blockly.SOUND_LIMIT||(this.lastSound_=a,c=goog.userAgent.DOCUMENT_MODE&&9===goog.userAgent.DOCUMENT_MODE||goog.userAgent.IPAD||goog.userAgent.ANDROID?c:c.cloneNode(),c.volume=void 0===b?1:b,c.play())):this.parentWorkspace_&&this.parentWorkspace_.getAudioManager().play(a,b)};Blockly.WorkspaceCommentSvg.render={};Blockly.WorkspaceCommentSvg.RESIZE_SIZE=8;Blockly.WorkspaceCommentSvg.BORDER_RADIUS=3;Blockly.WorkspaceCommentSvg.TEXTAREA_OFFSET=2;Blockly.WorkspaceCommentSvg.TOP_OFFSET=10;Blockly.WorkspaceCommentSvg.prototype.getHeightWidth=function(){return{width:this.getWidth(),height:this.getHeight()}};
 Blockly.WorkspaceCommentSvg.prototype.render=function(){if(!this.rendered_){var a=this.getHeightWidth();this.createEditor_();this.svgGroup_.appendChild(this.foreignObject_);this.svgHandleTarget_=Blockly.utils.createSvgElement("rect",{"class":"blocklyCommentHandleTarget",x:0,y:0});this.svgGroup_.appendChild(this.svgHandleTarget_);this.svgRectTarget_=Blockly.utils.createSvgElement("rect",{"class":"blocklyCommentTarget",x:0,y:0,rx:Blockly.WorkspaceCommentSvg.BORDER_RADIUS,ry:Blockly.WorkspaceCommentSvg.BORDER_RADIUS});
 this.svgGroup_.appendChild(this.svgRectTarget_);this.addResizeDom_();this.isDeletable()&&this.addDeleteDom_();this.setSize_(a.width,a.height);this.textarea_.value=this.content_;this.rendered_=!0;this.resizeGroup_&&Blockly.bindEventWithChecks_(this.resizeGroup_,"mousedown",this,this.resizeMouseDown_);this.isDeletable()&&(Blockly.bindEventWithChecks_(this.deleteGroup_,"mousedown",this,this.deleteMouseDown_),Blockly.bindEventWithChecks_(this.deleteGroup_,"mouseout",this,this.deleteMouseOut_),Blockly.bindEventWithChecks_(this.deleteGroup_,
@@ -1237,8 +1246,8 @@ Blockly.WorkspaceCommentSvg.prototype.resizeMouseMove_=function(a){this.autoLayo
 Blockly.WorkspaceCommentSvg.prototype.resizeComment_=function(){var a=this.getHeightWidth(),b=Blockly.WorkspaceCommentSvg.TOP_OFFSET,c=2*Blockly.WorkspaceCommentSvg.TEXTAREA_OFFSET;this.foreignObject_.setAttribute("width",a.width);this.foreignObject_.setAttribute("height",a.height-b);this.RTL&&this.foreignObject_.setAttribute("x",-a.width);this.textarea_.style.width=a.width-c+"px";this.textarea_.style.height=a.height-c-b+"px"};
 Blockly.WorkspaceCommentSvg.prototype.setSize_=function(a,b){a=Math.max(a,45);b=Math.max(b,20+Blockly.WorkspaceCommentSvg.TOP_OFFSET);this.width_=a;this.height_=b;this.svgRect_.setAttribute("width",a);this.svgRect_.setAttribute("height",b);this.svgRectTarget_.setAttribute("width",a);this.svgRectTarget_.setAttribute("height",b);this.svgHandleTarget_.setAttribute("width",a);this.svgHandleTarget_.setAttribute("height",Blockly.WorkspaceCommentSvg.TOP_OFFSET);this.RTL&&(this.svgRect_.setAttribute("transform",
 "scale(-1 1)"),this.svgRectTarget_.setAttribute("transform","scale(-1 1)"));var c=Blockly.WorkspaceCommentSvg.RESIZE_SIZE;this.resizeGroup_&&(this.RTL?(this.resizeGroup_.setAttribute("transform","translate("+(-a+c)+","+(b-c)+") scale(-1 1)"),this.deleteGroup_.setAttribute("transform","translate("+(-a+c)+","+-c+") scale(-1 1)")):(this.resizeGroup_.setAttribute("transform","translate("+(a-c)+","+(b-c)+")"),this.deleteGroup_.setAttribute("transform","translate("+(a-c)+","+-c+")")));this.resizeComment_()};
-Blockly.WorkspaceCommentSvg.prototype.disposeInternal_=function(){this.svgHandleTarget_=this.svgRectTarget_=this.foreignObject_=this.textarea_=null};Blockly.WorkspaceCommentSvg.prototype.setFocus=function(){var a=this;this.focused_=!0;setTimeout(function(){a.textarea_.focus();a.addFocus();Blockly.utils.addClass(a.svgRectTarget_,"blocklyCommentTargetFocused");Blockly.utils.addClass(a.svgHandleTarget_,"blocklyCommentHandleTargetFocused")},0)};
-Blockly.WorkspaceCommentSvg.prototype.blurFocus=function(){var a=this;this.focused_=!1;setTimeout(function(){a.textarea_.blur();a.removeFocus();Blockly.utils.removeClass(a.svgRectTarget_,"blocklyCommentTargetFocused");Blockly.utils.removeClass(a.svgHandleTarget_,"blocklyCommentHandleTargetFocused")},0)};Blockly.WorkspaceDragSurfaceSvg=function(a){this.container_=a;this.createDom()};Blockly.WorkspaceDragSurfaceSvg.prototype.SVG_=null;Blockly.WorkspaceDragSurfaceSvg.prototype.dragGroup_=null;Blockly.WorkspaceDragSurfaceSvg.prototype.container_=null;
+Blockly.WorkspaceCommentSvg.prototype.disposeInternal_=function(){this.svgHandleTarget_=this.svgRectTarget_=this.foreignObject_=this.textarea_=null;this.disposed_=!0};Blockly.WorkspaceCommentSvg.prototype.setFocus=function(){var a=this;this.focused_=!0;setTimeout(function(){a.disposed_||(a.textarea_.focus(),a.addFocus(),Blockly.utils.addClass(a.svgRectTarget_,"blocklyCommentTargetFocused"),Blockly.utils.addClass(a.svgHandleTarget_,"blocklyCommentHandleTargetFocused"))},0)};
+Blockly.WorkspaceCommentSvg.prototype.blurFocus=function(){var a=this;this.focused_=!1;setTimeout(function(){a.disposed_||(a.textarea_.blur(),a.removeFocus(),Blockly.utils.removeClass(a.svgRectTarget_,"blocklyCommentTargetFocused"),Blockly.utils.removeClass(a.svgHandleTarget_,"blocklyCommentHandleTargetFocused"))},0)};Blockly.WorkspaceDragSurfaceSvg=function(a){this.container_=a;this.createDom()};Blockly.WorkspaceDragSurfaceSvg.prototype.SVG_=null;Blockly.WorkspaceDragSurfaceSvg.prototype.dragGroup_=null;Blockly.WorkspaceDragSurfaceSvg.prototype.container_=null;
 Blockly.WorkspaceDragSurfaceSvg.prototype.createDom=function(){this.SVG_||(this.SVG_=Blockly.utils.createSvgElement("svg",{xmlns:Blockly.SVG_NS,"xmlns:html":Blockly.HTML_NS,"xmlns:xlink":"http://www.w3.org/1999/xlink",version:"1.1","class":"blocklyWsDragSurface blocklyOverflowVisible"},null),this.container_.appendChild(this.SVG_))};
 Blockly.WorkspaceDragSurfaceSvg.prototype.translateSurface=function(a,b){a=a.toFixed(0);b=b.toFixed(0);this.SVG_.style.display="block";Blockly.utils.setCssTransform(this.SVG_,"translate3d("+a+"px, "+b+"px, 0px)")};Blockly.WorkspaceDragSurfaceSvg.prototype.getSurfaceTranslation=function(){return Blockly.utils.getRelativeXY(this.SVG_)};
 Blockly.WorkspaceDragSurfaceSvg.prototype.clearAndHide=function(a){if(!a)throw Error("Couldn't clear and hide the drag surface: missing new surface.");var b=this.SVG_.childNodes[0],c=this.SVG_.childNodes[1];if(!(b&&c&&Blockly.utils.hasClass(b,"blocklyBlockCanvas")&&Blockly.utils.hasClass(c,"blocklyBubbleCanvas")))throw Error("Couldn't clear and hide the drag surface. A node was missing.");null!=this.previousSibling_?Blockly.utils.insertAfter(b,this.previousSibling_):a.insertBefore(b,a.firstChild);
@@ -1249,12 +1258,12 @@ Blockly.ZoomControls.prototype.createDom=function(){this.svgGroup_=Blockly.utils
 Blockly.ZoomControls.prototype.dispose=function(){this.svgGroup_&&(Blockly.utils.removeNode(this.svgGroup_),this.svgGroup_=null);this.workspace_=null};
 Blockly.ZoomControls.prototype.position=function(){var a=this.workspace_.getMetrics();a&&(this.workspace_.RTL?(this.left_=this.MARGIN_SIDE_+Blockly.Scrollbar.scrollbarThickness,a.toolboxPosition==Blockly.TOOLBOX_AT_LEFT&&(this.left_+=a.flyoutWidth,this.workspace_.toolbox_&&(this.left_+=a.absoluteLeft))):(this.left_=a.viewWidth+a.absoluteLeft-this.WIDTH_-this.MARGIN_SIDE_-Blockly.Scrollbar.scrollbarThickness,a.toolboxPosition==Blockly.TOOLBOX_AT_RIGHT&&(this.left_-=a.flyoutWidth)),this.top_=a.viewHeight+
 a.absoluteTop-this.HEIGHT_-this.bottom_,a.toolboxPosition==Blockly.TOOLBOX_AT_BOTTOM&&(this.top_-=a.flyoutHeight),this.svgGroup_.setAttribute("transform","translate("+this.left_+","+this.top_+")"))};
-Blockly.ZoomControls.prototype.createZoomOutSvg_=function(a){var b=this.workspace_,c=Blockly.utils.createSvgElement("clipPath",{id:"blocklyZoomoutClipPath"+a},this.svgGroup_);Blockly.utils.createSvgElement("rect",{width:32,height:32,y:77},c);a=Blockly.utils.createSvgElement("image",{width:Blockly.SPRITE.width,height:Blockly.SPRITE.height,x:-64,y:-15,"clip-path":"url(#blocklyZoomoutClipPath"+a+")"},this.svgGroup_);a.setAttributeNS("http://www.w3.org/1999/xlink","xlink:href",b.options.pathToMedia+Blockly.SPRITE.url);
-Blockly.bindEventWithChecks_(a,"mousedown",null,function(a){b.markFocused();b.zoomCenter(-1);Blockly.Touch.clearTouchIdentifier();a.stopPropagation();a.preventDefault()})};
-Blockly.ZoomControls.prototype.createZoomInSvg_=function(a){var b=this.workspace_,c=Blockly.utils.createSvgElement("clipPath",{id:"blocklyZoominClipPath"+a},this.svgGroup_);Blockly.utils.createSvgElement("rect",{width:32,height:32,y:43},c);a=Blockly.utils.createSvgElement("image",{width:Blockly.SPRITE.width,height:Blockly.SPRITE.height,x:-32,y:-49,"clip-path":"url(#blocklyZoominClipPath"+a+")"},this.svgGroup_);a.setAttributeNS("http://www.w3.org/1999/xlink","xlink:href",b.options.pathToMedia+Blockly.SPRITE.url);
-Blockly.bindEventWithChecks_(a,"mousedown",null,function(a){b.markFocused();b.zoomCenter(1);Blockly.Touch.clearTouchIdentifier();a.stopPropagation();a.preventDefault()})};
-Blockly.ZoomControls.prototype.createZoomResetSvg_=function(a){var b=this.workspace_,c=Blockly.utils.createSvgElement("clipPath",{id:"blocklyZoomresetClipPath"+a},this.svgGroup_);Blockly.utils.createSvgElement("rect",{width:32,height:32},c);a=Blockly.utils.createSvgElement("image",{width:Blockly.SPRITE.width,height:Blockly.SPRITE.height,y:-92,"clip-path":"url(#blocklyZoomresetClipPath"+a+")"},this.svgGroup_);a.setAttributeNS("http://www.w3.org/1999/xlink","xlink:href",b.options.pathToMedia+Blockly.SPRITE.url);
-Blockly.bindEventWithChecks_(a,"mousedown",null,function(a){b.markFocused();b.setScale(b.options.zoomOptions.startScale);b.beginCanvasTransition();b.scrollCenter();setTimeout(function(){b.endCanvasTransition()},500);Blockly.Touch.clearTouchIdentifier();a.stopPropagation();a.preventDefault()})};
+Blockly.ZoomControls.prototype.createZoomOutSvg_=function(a){var b=this.workspace_,c=Blockly.utils.createSvgElement("svg",{id:"svg"+a},this.svgGroup_),d=Blockly.utils.createSvgElement("clipPath",{id:"blocklyZoomoutClipPath"+a},c);Blockly.utils.createSvgElement("rect",{width:32,height:32,y:77},d);a=Blockly.utils.createSvgElement("image",{width:Blockly.SPRITE.width,height:Blockly.SPRITE.height,x:-64,y:-15,"clip-path":"url(#blocklyZoomoutClipPath"+a+")"},c);a.setAttributeNS("http://www.w3.org/1999/xlink",
+"xlink:href",b.options.pathToMedia+Blockly.SPRITE.url);Blockly.bindEventWithChecks_(a,"mousedown",null,function(a){b.markFocused();b.zoomCenter(-1);Blockly.Touch.clearTouchIdentifier();a.stopPropagation();a.preventDefault()})};
+Blockly.ZoomControls.prototype.createZoomInSvg_=function(a){var b=this.workspace_,c=Blockly.utils.createSvgElement("svg",{id:"svg"+a},this.svgGroup_),d=Blockly.utils.createSvgElement("clipPath",{id:"blocklyZoominClipPath"+a},c);Blockly.utils.createSvgElement("rect",{width:32,height:32,y:43},d);a=Blockly.utils.createSvgElement("image",{width:Blockly.SPRITE.width,height:Blockly.SPRITE.height,x:-32,y:-49,"clip-path":"url(#blocklyZoominClipPath"+a+")"},c);a.setAttributeNS("http://www.w3.org/1999/xlink",
+"xlink:href",b.options.pathToMedia+Blockly.SPRITE.url);Blockly.bindEventWithChecks_(a,"mousedown",null,function(a){b.markFocused();b.zoomCenter(1);Blockly.Touch.clearTouchIdentifier();a.stopPropagation();a.preventDefault()})};
+Blockly.ZoomControls.prototype.createZoomResetSvg_=function(a){var b=this.workspace_,c=Blockly.utils.createSvgElement("svg",{id:"svg"+a},this.svgGroup_),d=Blockly.utils.createSvgElement("clipPath",{id:"blocklyZoomresetClipPath"+a},c);Blockly.utils.createSvgElement("rect",{width:32,height:32},d);a=Blockly.utils.createSvgElement("image",{width:Blockly.SPRITE.width,height:Blockly.SPRITE.height,y:-92,"clip-path":"url(#blocklyZoomresetClipPath"+a+")"},c);a.setAttributeNS("http://www.w3.org/1999/xlink",
+"xlink:href",b.options.pathToMedia+Blockly.SPRITE.url);Blockly.bindEventWithChecks_(a,"mousedown",null,function(a){b.markFocused();b.setScale(b.options.zoomOptions.startScale);b.beginCanvasTransition();b.scrollCenter();setTimeout(function(){b.endCanvasTransition()},500);Blockly.Touch.clearTouchIdentifier();a.stopPropagation();a.preventDefault()})};
 Blockly.WorkspaceSvg=function(a,b,c){Blockly.WorkspaceSvg.superClass_.constructor.call(this,a);this.getMetrics=a.getMetrics||Blockly.WorkspaceSvg.getTopLevelWorkspaceMetrics_;this.setMetrics=a.setMetrics||Blockly.WorkspaceSvg.setTopLevelWorkspaceMetrics_;Blockly.ConnectionDB.init(this);b&&(this.blockDragSurface_=b);c&&(this.workspaceDragSurface_=c);this.useWorkspaceDragSurface_=this.workspaceDragSurface_&&Blockly.utils.is3dSupported();this.highlightedBlocks_=[];this.audioManager_=new Blockly.WorkspaceAudio(a.parentWorkspace);
 this.grid_=this.options.gridPattern?new Blockly.Grid(a.gridPattern,a.gridOptions):null;Blockly.Variables&&Blockly.Variables.flyoutCategory&&this.registerToolboxCategoryCallback(Blockly.VARIABLE_CATEGORY_NAME,Blockly.Variables.flyoutCategory);Blockly.VariablesDynamic&&Blockly.VariablesDynamic.flyoutCategory&&this.registerToolboxCategoryCallback(Blockly.VARIABLE_DYNAMIC_CATEGORY_NAME,Blockly.VariablesDynamic.flyoutCategory);Blockly.Procedures&&Blockly.Procedures.flyoutCategory&&this.registerToolboxCategoryCallback(Blockly.PROCEDURE_CATEGORY_NAME,
 Blockly.Procedures.flyoutCategory)};goog.inherits(Blockly.WorkspaceSvg,Blockly.Workspace);Blockly.WorkspaceSvg.prototype.resizeHandlerWrapper_=null;Blockly.WorkspaceSvg.prototype.rendered=!0;Blockly.WorkspaceSvg.prototype.isVisible_=!0;Blockly.WorkspaceSvg.prototype.isFlyout=!1;Blockly.WorkspaceSvg.prototype.isMutator=!1;Blockly.WorkspaceSvg.prototype.resizesEnabled_=!0;Blockly.WorkspaceSvg.prototype.scrollX=0;Blockly.WorkspaceSvg.prototype.scrollY=0;Blockly.WorkspaceSvg.prototype.startScrollX=0;
@@ -1290,7 +1299,7 @@ Blockly.WorkspaceSvg.prototype.isDeleteArea=function(a){a=new goog.math.Coordina
 Blockly.WorkspaceSvg.prototype.startDrag=function(a,b){a=Blockly.utils.mouseToSvg(a,this.getParentSvg(),this.getInverseScreenCTM());a.x/=this.scale;a.y/=this.scale;this.dragDeltaXY_=goog.math.Coordinate.difference(b,a)};Blockly.WorkspaceSvg.prototype.moveDrag=function(a){a=Blockly.utils.mouseToSvg(a,this.getParentSvg(),this.getInverseScreenCTM());a.x/=this.scale;a.y/=this.scale;return goog.math.Coordinate.sum(this.dragDeltaXY_,a)};
 Blockly.WorkspaceSvg.prototype.isDragging=function(){return null!=this.currentGesture_&&this.currentGesture_.isDragging()};Blockly.WorkspaceSvg.prototype.isDraggable=function(){return!!this.scrollbar};Blockly.WorkspaceSvg.prototype.onMouseWheel_=function(a){this.currentGesture_&&this.currentGesture_.cancel();var b=-a.deltaY/50,c=Blockly.utils.mouseToSvg(a,this.getParentSvg(),this.getInverseScreenCTM());this.zoom(c.x,c.y,b);a.preventDefault()};
 Blockly.WorkspaceSvg.prototype.getBlocksBoundingBox=function(){var a=this.getTopBlocks(!1),b=this.getTopComments(!1);a=a.concat(b);if(!a.length)return{x:0,y:0,width:0,height:0};b=a[0].getBoundingRectangle();for(var c=1;c<a.length;c++){var d=a[c].getBoundingRectangle();d.topLeft.x<b.topLeft.x&&(b.topLeft.x=d.topLeft.x);d.bottomRight.x>b.bottomRight.x&&(b.bottomRight.x=d.bottomRight.x);d.topLeft.y<b.topLeft.y&&(b.topLeft.y=d.topLeft.y);d.bottomRight.y>b.bottomRight.y&&(b.bottomRight.y=d.bottomRight.y)}return{x:b.topLeft.x,
-y:b.topLeft.y,width:b.bottomRight.x-b.topLeft.x,height:b.bottomRight.y-b.topLeft.y}};Blockly.WorkspaceSvg.prototype.cleanUp=function(){this.setResizesEnabled(!1);Blockly.Events.setGroup(!0);for(var a=this.getTopBlocks(!0),b=0,c=0,d;d=a[c];c++){var e=d.getRelativeToSurfaceXY();d.moveBy(-e.x,b-e.y);d.snapToGrid();b=d.getRelativeToSurfaceXY().y+d.getHeightWidth().height+Blockly.BlockSvg.MIN_BLOCK_Y}Blockly.Events.setGroup(!1);this.setResizesEnabled(!0)};
+y:b.topLeft.y,width:b.bottomRight.x-b.topLeft.x,height:b.bottomRight.y-b.topLeft.y}};Blockly.WorkspaceSvg.prototype.cleanUp=function(){this.setResizesEnabled(!1);Blockly.Events.setGroup(!0);for(var a=this.getTopBlocks(!0),b=0,c=0,d;d=a[c];c++)if(d.isMovable()){var e=d.getRelativeToSurfaceXY();d.moveBy(-e.x,b-e.y);d.snapToGrid();b=d.getRelativeToSurfaceXY().y+d.getHeightWidth().height+Blockly.BlockSvg.MIN_BLOCK_Y}Blockly.Events.setGroup(!1);this.setResizesEnabled(!0)};
 Blockly.WorkspaceSvg.prototype.showContextMenu_=function(a){function b(a){if(a.isDeletable())p=p.concat(a.getDescendants(!1));else{a=a.getChildren(!1);for(var c=0;c<a.length;c++)b(a[c])}}function c(){Blockly.Events.setGroup(f);var a=p.shift();a&&(a.workspace?(a.dispose(!1,!0),setTimeout(c,10)):c());Blockly.Events.setGroup(!1)}if(!this.options.readOnly&&!this.isFlyout){var d=[],e=this.getTopBlocks(!0),f=Blockly.utils.genUid(),g=this,h={};h.text=Blockly.Msg.UNDO;h.enabled=0<this.undoStack_.length;h.callback=
 this.undo.bind(this,!1);d.push(h);h={};h.text=Blockly.Msg.REDO;h.enabled=0<this.redoStack_.length;h.callback=this.undo.bind(this,!0);d.push(h);this.scrollbar&&(h={},h.text=Blockly.Msg.CLEAN_UP,h.enabled=1<e.length,h.callback=this.cleanUp.bind(this),d.push(h));if(this.options.collapse){for(var k=h=!1,l=0;l<e.length;l++)for(var n=e[l];n;)n.isCollapsed()?h=!0:k=!0,n=n.getNextBlock();var m=function(a){for(var b=0,c=0;c<e.length;c++)for(var d=e[c];d;)setTimeout(d.setCollapsed.bind(d,a),b),d=d.getNextBlock(),
 b+=10};k={enabled:k};k.text=Blockly.Msg.COLLAPSE_ALL;k.callback=function(){m(!0)};d.push(k);h={enabled:h};h.text=Blockly.Msg.EXPAND_ALL;h.callback=function(){m(!1)};d.push(h)}var p=[];for(l=0;l<e.length;l++)b(e[l]);h={text:1==p.length?Blockly.Msg.DELETE_BLOCK:Blockly.Msg.DELETE_X_BLOCKS.replace("%1",String(p.length)),enabled:0<p.length,callback:function(){g.currentGesture_&&g.currentGesture_.cancel();2>p.length?c():Blockly.confirm(Blockly.Msg.DELETE_ALL_BLOCKS.replace("%1",p.length),function(a){a&&
@@ -1362,11 +1371,11 @@ Blockly.Warning.textToDom_=function(a){var b=Blockly.utils.createSvgElement("tex
 Blockly.Warning.prototype.setVisible=function(a){if(a!=this.isVisible())if(Blockly.Events.fire(new Blockly.Events.Ui(this.block_,"warningOpen",!a,a)),a){a=Blockly.Warning.textToDom_(this.getText());this.bubble_=new Blockly.Bubble(this.block_.workspace,a,this.block_.svgPath_,this.iconXY_,null,null);this.bubble_.setSvgId(this.block_.id);if(this.block_.RTL)for(var b=a.getBBox().width,c=0,d;d=a.childNodes[c];c++)d.setAttribute("text-anchor","end"),d.setAttribute("x",b+Blockly.Bubble.BORDER_WIDTH);this.updateColour();
 a=this.bubble_.getBubbleSize();this.bubble_.setBubbleSize(a.width,a.height)}else this.bubble_.dispose(),this.body_=this.bubble_=null};Blockly.Warning.prototype.bodyFocus_=function(a){this.bubble_.promote_()};Blockly.Warning.prototype.setText=function(a,b){this.text_[b]!=a&&(a?this.text_[b]=a:delete this.text_[b],this.isVisible()&&(this.setVisible(!1),this.setVisible(!0)))};Blockly.Warning.prototype.getText=function(){var a=[],b;for(b in this.text_)a.push(this.text_[b]);return a.join("\n")};
 Blockly.Warning.prototype.dispose=function(){this.block_.warning=null;Blockly.Icon.prototype.dispose.call(this)};Blockly.Block=function(a,b,c){if("undefined"!==typeof Blockly.Generator.prototype[b])throw Error('Block prototypeName "'+b+'" conflicts with Blockly.Generator members.');this.id=c&&!a.getBlockById(c)?c:Blockly.utils.genUid();a.blockDB_[this.id]=this;this.previousConnection=this.nextConnection=this.outputConnection=null;this.inputList=[];this.inputsInline=void 0;this.disabled=!1;this.tooltip="";this.contextMenu=!0;this.parentBlock_=null;this.childBlocks_=[];this.editable_=this.movable_=this.deletable_=
-!0;this.collapsed_=this.isShadow_=!1;this.comment=null;this.xy_=new goog.math.Coordinate(0,0);this.workspace=a;this.isInFlyout=a.isFlyout;this.isInMutator=a.isMutator;this.RTL=a.RTL;this.isInsertionMarker_=!1;if(b){this.type=b;c=Blockly.Blocks[b];if(!c||"object"!=typeof c)throw TypeError("Unknown block type: "+b);goog.mixin(this,c)}a.addTopBlock(this);"function"==typeof this.init&&this.init();this.inputsInlineDefault=this.inputsInline;if(Blockly.Events.isEnabled()){(a=Blockly.Events.getGroup())||
+!0;this.collapsed_=this.isShadow_=!1;this.comment=null;this.xy_=new goog.math.Coordinate(0,0);this.workspace=a;this.isInFlyout=a.isFlyout;this.isInMutator=a.isMutator;this.RTL=a.RTL;this.isInsertionMarker_=!1;if(b){this.type=b;c=Blockly.Blocks[b];if(!c||"object"!=typeof c)throw TypeError("Unknown block type: "+b);goog.mixin(this,c)}a.addTopBlock(this);a.addTypedBlock(this);"function"==typeof this.init&&this.init();this.inputsInlineDefault=this.inputsInline;if(Blockly.Events.isEnabled()){(a=Blockly.Events.getGroup())||
 Blockly.Events.setGroup(!0);try{Blockly.Events.fire(new Blockly.Events.BlockCreate(this))}finally{a||Blockly.Events.setGroup(!1)}}"function"==typeof this.onchange&&this.setOnChange(this.onchange)};Blockly.Block.obtain=function(a,b){console.warn("Deprecated call to Blockly.Block.obtain, use workspace.newBlock instead.");return a.newBlock(b)};Blockly.Block.prototype.data=null;Blockly.Block.prototype.colour_="#000000";Blockly.Block.prototype.hue_=null;
-Blockly.Block.prototype.dispose=function(a){if(this.workspace){this.onchangeWrapper_&&this.workspace.removeChangeListener(this.onchangeWrapper_);this.unplug(a);Blockly.Events.isEnabled()&&Blockly.Events.fire(new Blockly.Events.BlockDelete(this));Blockly.Events.disable();try{this.workspace&&(this.workspace.removeTopBlock(this),delete this.workspace.blockDB_[this.id],this.workspace=null);Blockly.selected==this&&(Blockly.selected=null);for(var b=this.childBlocks_.length-1;0<=b;b--)this.childBlocks_[b].dispose(!1);
-b=0;for(var c;c=this.inputList[b];b++)c.dispose();this.inputList.length=0;var d=this.getConnections_(!0);for(b=0;b<d.length;b++){var e=d[b];e.isConnected()&&e.disconnect();d[b].dispose()}}finally{Blockly.Events.enable()}}};Blockly.Block.prototype.initModel=function(){for(var a=0,b;b=this.inputList[a];a++)for(var c=0,d;d=b.fieldRow[c];c++)d.initModel&&d.initModel()};Blockly.Block.prototype.unplug=function(a){this.outputConnection?this.unplugFromRow_(a):this.previousConnection&&this.unplugFromStack_(a)};
-Blockly.Block.prototype.unplugFromRow_=function(a){var b=null;this.outputConnection.isConnected()&&(b=this.outputConnection.targetConnection,this.outputConnection.disconnect());b&&a&&(a=this.getOnlyValueConnection_())&&a.isConnected()&&(a=a.targetConnection,a.checkType_(b)&&(a.disconnect(),b.connect(a)))};
+Blockly.Block.prototype.dispose=function(a){if(this.workspace){this.onchangeWrapper_&&this.workspace.removeChangeListener(this.onchangeWrapper_);this.unplug(a);Blockly.Events.isEnabled()&&Blockly.Events.fire(new Blockly.Events.BlockDelete(this));Blockly.Events.disable();try{this.workspace&&(this.workspace.removeTopBlock(this),this.workspace.removeTypedBlock(this),delete this.workspace.blockDB_[this.id],this.workspace=null);Blockly.selected==this&&(Blockly.selected=null);for(var b=this.childBlocks_.length-
+1;0<=b;b--)this.childBlocks_[b].dispose(!1);b=0;for(var c;c=this.inputList[b];b++)c.dispose();this.inputList.length=0;var d=this.getConnections_(!0);for(b=0;b<d.length;b++){var e=d[b];e.isConnected()&&e.disconnect();d[b].dispose()}}finally{Blockly.Events.enable()}}};Blockly.Block.prototype.initModel=function(){for(var a=0,b;b=this.inputList[a];a++)for(var c=0,d;d=b.fieldRow[c];c++)d.initModel&&d.initModel()};
+Blockly.Block.prototype.unplug=function(a){this.outputConnection?this.unplugFromRow_(a):this.previousConnection&&this.unplugFromStack_(a)};Blockly.Block.prototype.unplugFromRow_=function(a){var b=null;this.outputConnection.isConnected()&&(b=this.outputConnection.targetConnection,this.outputConnection.disconnect());b&&a&&(a=this.getOnlyValueConnection_())&&a.isConnected()&&(a=a.targetConnection,a.checkType_(b)&&(a.disconnect(),b.connect(a)))};
 Blockly.Block.prototype.getOnlyValueConnection_=function(){for(var a=null,b=0;b<this.inputList.length;b++){var c=this.inputList[b].connection;if(c&&c.type==Blockly.INPUT_VALUE){if(a)return null;a=c}}return a};
 Blockly.Block.prototype.unplugFromStack_=function(a){var b=null;this.previousConnection.isConnected()&&(b=this.previousConnection.targetConnection,this.previousConnection.disconnect());var c=this.getNextBlock();a&&c&&(a=this.nextConnection.targetConnection,a.disconnect(),b&&b.checkType_(a)&&b.connect(a))};
 Blockly.Block.prototype.getConnections_=function(a){a=[];this.outputConnection&&a.push(this.outputConnection);this.previousConnection&&a.push(this.previousConnection);this.nextConnection&&a.push(this.nextConnection);for(var b=0,c;c=this.inputList[b];b++)c.connection&&a.push(c.connection);return a};Blockly.Block.prototype.lastConnectionInStack=function(){for(var a=this.nextConnection;a;){var b=a.targetBlock();if(!b)return a;a=b.nextConnection}return null};Blockly.Block.prototype.bumpNeighbours_=function(){console.warn("Not expected to reach this bumpNeighbours_ function. The BlockSvg function for bumpNeighbours_ was expected to be called instead.")};
@@ -1375,8 +1384,8 @@ Blockly.Block.prototype.getPreviousBlock=function(){return this.previousConnecti
 Blockly.Block.prototype.getChildren=function(a){if(!a)return this.childBlocks_;a=[];for(var b=0,c;c=this.inputList[b];b++)c.connection&&(c=c.connection.targetBlock())&&a.push(c);(b=this.getNextBlock())&&a.push(b);return a};
 Blockly.Block.prototype.setParent=function(a){if(a!=this.parentBlock_){if(this.parentBlock_){Blockly.utils.arrayRemove(this.parentBlock_.childBlocks_,this);if(this.previousConnection&&this.previousConnection.isConnected())throw Error("Still connected to previous block.");if(this.outputConnection&&this.outputConnection.isConnected())throw Error("Still connected to parent block.");this.parentBlock_=null}else this.workspace.removeTopBlock(this);(this.parentBlock_=a)?a.childBlocks_.push(this):this.workspace.addTopBlock(this)}};
 Blockly.Block.prototype.getDescendants=function(a){for(var b=[this],c=this.getChildren(a),d,e=0;d=c[e];e++)b.push.apply(b,d.getDescendants(a));return b};Blockly.Block.prototype.isDeletable=function(){return this.deletable_&&!this.isShadow_&&!(this.workspace&&this.workspace.options.readOnly)};Blockly.Block.prototype.setDeletable=function(a){this.deletable_=a};Blockly.Block.prototype.isMovable=function(){return this.movable_&&!this.isShadow_&&!(this.workspace&&this.workspace.options.readOnly)};
-Blockly.Block.prototype.setMovable=function(a){this.movable_=a};Blockly.Block.prototype.isShadow=function(){return this.isShadow_};Blockly.Block.prototype.setShadow=function(a){this.isShadow_=a};Blockly.Block.prototype.isInsertionMarker=function(){return this.isInsertionMarker_};Blockly.Block.prototype.setInsertionMarker=function(a){this.isInsertionMarker_=a};Blockly.Block.prototype.isEditable=function(){return this.editable_&&!(this.workspace&&this.workspace.options.readOnly)};
-Blockly.Block.prototype.setEditable=function(a){this.editable_=a;a=0;for(var b;b=this.inputList[a];a++)for(var c=0,d;d=b.fieldRow[c];c++)d.updateEditable()};
+Blockly.Block.prototype.setMovable=function(a){this.movable_=a};Blockly.Block.prototype.isDuplicatable=function(){return this.workspace.hasBlockLimits()?this.workspace.isCapacityAvailable(Blockly.utils.getBlockTypeCounts(this,!0)):!0};Blockly.Block.prototype.isShadow=function(){return this.isShadow_};Blockly.Block.prototype.setShadow=function(a){this.isShadow_=a};Blockly.Block.prototype.isInsertionMarker=function(){return this.isInsertionMarker_};
+Blockly.Block.prototype.setInsertionMarker=function(a){this.isInsertionMarker_=a};Blockly.Block.prototype.isEditable=function(){return this.editable_&&!(this.workspace&&this.workspace.options.readOnly)};Blockly.Block.prototype.setEditable=function(a){this.editable_=a;a=0;for(var b;b=this.inputList[a];a++)for(var c=0,d;d=b.fieldRow[c];c++)d.updateEditable()};
 Blockly.Block.prototype.setConnectionsHidden=function(a){if(!a&&this.isCollapsed()){if(this.outputConnection&&this.outputConnection.setHidden(a),this.previousConnection&&this.previousConnection.setHidden(a),this.nextConnection){this.nextConnection.setHidden(a);var b=this.nextConnection.targetBlock();b&&b.setConnectionsHidden(a)}}else for(var c=this.getConnections_(!0),d=0;b=c[d];d++)b.setHidden(a),b.isSuperior()&&(b=b.targetBlock())&&b.setConnectionsHidden(a)};
 Blockly.Block.prototype.getMatchingConnection=function(a,b){var c=this.getConnections_(!0);a=a.getConnections_(!0);if(c.length!=a.length)throw Error("Connection lists did not match in length.");for(var d=0;d<a.length;d++)if(a[d]==b)return c[d];return null};Blockly.Block.prototype.setHelpUrl=function(a){this.helpUrl=a};Blockly.Block.prototype.setTooltip=function(a){this.tooltip=a};Blockly.Block.prototype.getColour=function(){return this.colour_};Blockly.Block.prototype.getHue=function(){return this.hue_};
 Blockly.Block.prototype.setColour=function(a){var b="string"==typeof a?Blockly.utils.replaceMessageReferences(a):a,c=Number(b);if(!isNaN(c)&&0<=c&&360>=c)this.hue_=c,this.colour_=Blockly.hueToRgb(c);else if("string"==typeof b&&/^#[0-9a-fA-F]{6}$/.test(b))this.colour_=b,this.hue_=null;else throw c='Invalid colour: "'+b+'"',a!=b&&(c+=' (from "'+a+'")'),c;};
@@ -1412,7 +1421,7 @@ Blockly.ContextMenu.position_=function(a,b,c){var d=Blockly.utils.getViewportBBo
 Blockly.ContextMenu.createWidget_=function(a){a.render(Blockly.WidgetDiv.DIV);var b=a.getElement();Blockly.utils.addClass(b,"blocklyContextMenu");Blockly.bindEventWithChecks_(b,"contextmenu",null,Blockly.utils.noEvent);a.setAllowAutoFocus(!0)};Blockly.ContextMenu.hide=function(){Blockly.WidgetDiv.hideIfOwner(Blockly.ContextMenu);Blockly.ContextMenu.currentBlock=null;Blockly.ContextMenu.eventWrapper_&&Blockly.unbindEvent_(Blockly.ContextMenu.eventWrapper_)};
 Blockly.ContextMenu.callbackFactory=function(a,b){return function(){Blockly.Events.disable();try{var c=Blockly.Xml.domToBlock(b,a.workspace),d=a.getRelativeToSurfaceXY();d.x=a.RTL?d.x-Blockly.SNAP_RADIUS:d.x+Blockly.SNAP_RADIUS;d.y+=2*Blockly.SNAP_RADIUS;c.moveBy(d.x,d.y)}finally{Blockly.Events.enable()}Blockly.Events.isEnabled()&&!c.isShadow()&&Blockly.Events.fire(new Blockly.Events.BlockCreate(c));c.select()}};
 Blockly.ContextMenu.blockDeleteOption=function(a){var b=a.getDescendants(!1).length,c=a.getNextBlock();c&&(b-=c.getDescendants(!1).length);return{text:1==b?Blockly.Msg.DELETE_BLOCK:Blockly.Msg.DELETE_X_BLOCKS.replace("%1",String(b)),enabled:!0,callback:function(){Blockly.Events.setGroup(!0);a.dispose(!0,!0);Blockly.Events.setGroup(!1)}}};Blockly.ContextMenu.blockHelpOption=function(a){return{enabled:!("function"==typeof a.helpUrl?!a.helpUrl():!a.helpUrl),text:Blockly.Msg.HELP,callback:function(){a.showHelp_()}}};
-Blockly.ContextMenu.blockDuplicateOption=function(a){var b=!0;a.getDescendants(!1).length>a.workspace.remainingCapacity()&&(b=!1);return{text:Blockly.Msg.DUPLICATE_BLOCK,enabled:b,callback:function(){Blockly.duplicate_(a)}}};Blockly.ContextMenu.blockCommentOption=function(a){var b={enabled:!goog.userAgent.IE};a.comment?(b.text=Blockly.Msg.REMOVE_COMMENT,b.callback=function(){a.setCommentText(null)}):(b.text=Blockly.Msg.ADD_COMMENT,b.callback=function(){a.setCommentText("")});return b};
+Blockly.ContextMenu.blockDuplicateOption=function(a){var b=a.isDuplicatable();return{text:Blockly.Msg.DUPLICATE_BLOCK,enabled:b,callback:function(){Blockly.duplicate_(a)}}};Blockly.ContextMenu.blockCommentOption=function(a){var b={enabled:!goog.userAgent.IE};a.comment?(b.text=Blockly.Msg.REMOVE_COMMENT,b.callback=function(){a.setCommentText(null)}):(b.text=Blockly.Msg.ADD_COMMENT,b.callback=function(){a.setCommentText("")});return b};
 Blockly.ContextMenu.commentDeleteOption=function(a){return{text:Blockly.Msg.REMOVE_COMMENT,enabled:!0,callback:function(){Blockly.Events.setGroup(!0);a.dispose(!0,!0);Blockly.Events.setGroup(!1)}}};Blockly.ContextMenu.commentDuplicateOption=function(a){return{text:Blockly.Msg.DUPLICATE_COMMENT,enabled:!0,callback:function(){Blockly.duplicate_(a)}}};
 Blockly.ContextMenu.workspaceCommentOption=function(a,b){var c={enabled:!goog.userAgent.IE};c.text=Blockly.Msg.ADD_COMMENT;c.callback=function(){var c=new Blockly.WorkspaceCommentSvg(a,Blockly.Msg.WORKSPACE_COMMENT_DEFAULT_TEXT,Blockly.WorkspaceCommentSvg.DEFAULT_SIZE,Blockly.WorkspaceCommentSvg.DEFAULT_SIZE),e=a.getInjectionDiv().getBoundingClientRect();e=new goog.math.Coordinate(b.clientX-e.left,b.clientY-e.top);var f=a.getOriginOffsetInPixels();e=goog.math.Coordinate.difference(e,f).scale(1/a.scale);
 c.moveBy(e.x,e.y);a.rendered&&(c.initSvg(),c.render(!1),c.select())};return c};Blockly.BlockSvg=function(a,b,c){this.svgGroup_=Blockly.utils.createSvgElement("g",{},null);this.svgGroup_.translate_="";this.svgPathDark_=Blockly.utils.createSvgElement("path",{"class":"blocklyPathDark",transform:"translate(1,1)"},this.svgGroup_);this.svgPath_=Blockly.utils.createSvgElement("path",{"class":"blocklyPath"},this.svgGroup_);this.svgPathLight_=Blockly.utils.createSvgElement("path",{"class":"blocklyPathLight"},this.svgGroup_);this.svgPath_.tooltip=this;this.rendered=!1;this.useDragSurface_=
@@ -1463,10 +1472,11 @@ Blockly.BlockSvg.INNER_TOP_LEFT_CORNER=Blockly.BlockSvg.NOTCH_PATH_RIGHT+" h -"+
 Blockly.BlockSvg.INNER_TOP_LEFT_CORNER_HIGHLIGHT_RTL="a "+Blockly.BlockSvg.CORNER_RADIUS+","+Blockly.BlockSvg.CORNER_RADIUS+" 0 0,0 "+(-Blockly.BlockSvg.DISTANCE_45_OUTSIDE-.5)+","+(Blockly.BlockSvg.CORNER_RADIUS-Blockly.BlockSvg.DISTANCE_45_OUTSIDE);Blockly.BlockSvg.INNER_BOTTOM_LEFT_CORNER_HIGHLIGHT_RTL="a "+(Blockly.BlockSvg.CORNER_RADIUS+.5)+","+(Blockly.BlockSvg.CORNER_RADIUS+.5)+" 0 0,0 "+(Blockly.BlockSvg.CORNER_RADIUS+.5)+","+(Blockly.BlockSvg.CORNER_RADIUS+.5);
 Blockly.BlockSvg.INNER_BOTTOM_LEFT_CORNER_HIGHLIGHT_LTR="a "+(Blockly.BlockSvg.CORNER_RADIUS+.5)+","+(Blockly.BlockSvg.CORNER_RADIUS+.5)+" 0 0,0 "+(Blockly.BlockSvg.CORNER_RADIUS-Blockly.BlockSvg.DISTANCE_45_OUTSIDE)+","+(Blockly.BlockSvg.DISTANCE_45_OUTSIDE+.5);Blockly.BlockSvg.prototype.getHeightWidth=function(){var a=this.height,b=this.width,c=this.getNextBlock();c?(c=c.getHeightWidth(),a+=c.height-4,b=Math.max(b,c.width)):this.nextConnection||this.outputConnection||(a+=2);return{height:a,width:b}};
 Blockly.BlockSvg.prototype.render=function(a){Blockly.Field.startCache();this.rendered=!0;var b=Blockly.BlockSvg.SEP_SPACE_X;this.RTL&&(b=-b);for(var c=this.getIcons(),d=0;d<c.length;d++)b=c[d].renderIcon(b);b+=this.RTL?Blockly.BlockSvg.SEP_SPACE_X:-Blockly.BlockSvg.SEP_SPACE_X;c=this.renderCompute_(b);this.renderDraw_(b,c);this.renderMoveConnections_();!1!==a&&((a=this.getParent())?a.render(!0):this.workspace.resizeContents());Blockly.Field.stopCache()};
-Blockly.BlockSvg.prototype.renderFields_=function(a,b,c){c+=Blockly.BlockSvg.INLINE_PADDING_Y;this.RTL&&(b=-b);for(var d=0,e;e=a[d];d++){var f=e.getSvgRoot();f&&(this.RTL?(b-=e.renderSep+e.renderWidth,f.setAttribute("transform","translate("+b+","+c+")"),e.renderWidth&&(b-=Blockly.BlockSvg.SEP_SPACE_X)):(f.setAttribute("transform","translate("+(b+e.renderSep)+","+c+")"),e.renderWidth&&(b+=e.renderSep+e.renderWidth+Blockly.BlockSvg.SEP_SPACE_X)))}return this.RTL?-b:b};
+Blockly.BlockSvg.prototype.renderFields_=function(a,b,c){c+=Blockly.BlockSvg.INLINE_PADDING_Y;this.RTL&&(b=-b);for(var d=0,e;e=a[d];d++){var f=e.getSvgRoot();f&&(this.RTL?(b-=e.renderSep+e.renderWidth,f.setAttribute("transform","translate("+b+","+c+")"),e.renderWidth&&(b-=Blockly.BlockSvg.SEP_SPACE_X)):(f.setAttribute("transform","translate("+(b+e.renderSep)+","+c+")"),e.renderWidth&&(b+=e.renderSep+e.renderWidth+Blockly.BlockSvg.SEP_SPACE_X)),this.isInsertionMarker()&&f.setAttribute("display","none"))}return this.RTL?
+-b:b};
 Blockly.BlockSvg.prototype.renderCompute_=function(a){var b=this.inputList,c=[];c.rightEdge=a+2*Blockly.BlockSvg.SEP_SPACE_X;if(this.previousConnection||this.nextConnection)c.rightEdge=Math.max(c.rightEdge,Blockly.BlockSvg.NOTCH_WIDTH+Blockly.BlockSvg.SEP_SPACE_X);for(var d=0,e=0,f=!1,g=!1,h=!1,k=void 0,l=this.getInputsInline()&&!this.isCollapsed(),n=0,m;m=b[n];n++)if(m.isVisible()){if(l&&k&&k!=Blockly.NEXT_STATEMENT&&m.type!=Blockly.NEXT_STATEMENT)var p=c[c.length-1];else k=m.type,p=[],p.type=l&&
 m.type!=Blockly.NEXT_STATEMENT?Blockly.BlockSvg.INLINE:m.type,p.height=0,c.push(p);p.push(m);m.renderHeight=Blockly.BlockSvg.MIN_BLOCK_Y;m.renderWidth=l&&m.type==Blockly.INPUT_VALUE?Blockly.BlockSvg.TAB_WIDTH+1.25*Blockly.BlockSvg.SEP_SPACE_X:0;if(m.connection&&m.connection.isConnected()){var q=m.connection.targetBlock().getHeightWidth();m.renderHeight=Math.max(m.renderHeight,q.height);m.renderWidth=Math.max(m.renderWidth,q.width)}l||n!=b.length-1?!l&&m.type==Blockly.INPUT_VALUE&&b[n+1]&&b[n+1].type==
-Blockly.NEXT_STATEMENT&&m.renderHeight--:m.renderHeight--;p.height=Math.max(p.height,m.renderHeight);m.fieldWidth=0;1==c.length&&(m.fieldWidth+=this.RTL?-a:a);q=!1;for(var t=0,r;r=m.fieldRow[t];t++){0!=t&&(m.fieldWidth+=Blockly.BlockSvg.SEP_SPACE_X);var u=r.getSize();r.renderWidth=u.width;r.renderSep=q&&r.EDITABLE?Blockly.BlockSvg.SEP_SPACE_X:0;m.fieldWidth+=r.renderWidth+r.renderSep;p.height=Math.max(p.height,u.height);q=r.EDITABLE}p.type!=Blockly.BlockSvg.INLINE&&(p.type==Blockly.NEXT_STATEMENT?
+Blockly.NEXT_STATEMENT&&m.renderHeight--:m.renderHeight--;p.height=Math.max(p.height,m.renderHeight);m.fieldWidth=0;1==c.length&&(m.fieldWidth+=this.RTL?-a:a);q=!1;for(var r=0,t;t=m.fieldRow[r];r++){0!=r&&(m.fieldWidth+=Blockly.BlockSvg.SEP_SPACE_X);var u=t.getSize();t.renderWidth=u.width;t.renderSep=q&&t.EDITABLE?Blockly.BlockSvg.SEP_SPACE_X:0;m.fieldWidth+=t.renderWidth+t.renderSep;p.height=Math.max(p.height,u.height);q=t.EDITABLE}p.type!=Blockly.BlockSvg.INLINE&&(p.type==Blockly.NEXT_STATEMENT?
 (g=!0,e=Math.max(e,m.fieldWidth)):(p.type==Blockly.INPUT_VALUE?f=!0:p.type==Blockly.DUMMY_INPUT&&(h=!0),d=Math.max(d,m.fieldWidth)))}for(a=0;p=c[a];a++)if(p.thicker=!1,p.type==Blockly.BlockSvg.INLINE)for(b=0;m=p[b];b++)if(m.type==Blockly.INPUT_VALUE){p.height+=2*Blockly.BlockSvg.INLINE_PADDING_Y;p.thicker=!0;break}c.statementEdge=2*Blockly.BlockSvg.SEP_SPACE_X+e;g&&(c.rightEdge=Math.max(c.rightEdge,c.statementEdge+Blockly.BlockSvg.NOTCH_WIDTH));f?c.rightEdge=Math.max(c.rightEdge,d+2*Blockly.BlockSvg.SEP_SPACE_X+
 Blockly.BlockSvg.TAB_WIDTH):h&&(c.rightEdge=Math.max(c.rightEdge,d+2*Blockly.BlockSvg.SEP_SPACE_X));c.hasValue=f;c.hasStatement=g;c.hasDummy=h;return c};
 Blockly.BlockSvg.prototype.renderDraw_=function(a,b){this.startHat_=!1;this.height=0;if(this.outputConnection)this.squareBottomLeftCorner_=this.squareTopLeftCorner_=!0;else{this.squareBottomLeftCorner_=this.squareTopLeftCorner_=!1;if(this.previousConnection){var c=this.previousConnection.targetBlock();c&&c.getNextBlock()==this&&(this.squareTopLeftCorner_=!0)}else Blockly.BlockSvg.START_HAT&&(this.startHat_=this.squareTopLeftCorner_=!0,this.height+=Blockly.BlockSvg.START_HAT_HEIGHT,b.rightEdge=Math.max(b.rightEdge,
@@ -1492,7 +1502,7 @@ Blockly.BlockSvg.prototype.renderDummyInput_=function(a,b,c,d,e){var f=a.steps;a
 Blockly.BlockSvg.prototype.renderStatementInput_=function(a,b,c,d,e,f){var g=a.steps;a=a.highlightSteps;var h=b[0];0==f&&(g.push("v",Blockly.BlockSvg.SEP_SPACE_Y),this.RTL&&a.push("v",Blockly.BlockSvg.SEP_SPACE_Y-1),c.y+=Blockly.BlockSvg.SEP_SPACE_Y);var k=c.x,l=c.y;if(h.align!=Blockly.ALIGN_LEFT){var n=e.statementEdge-h.fieldWidth-2*Blockly.BlockSvg.SEP_SPACE_X;h.align==Blockly.ALIGN_RIGHT?k+=n:h.align==Blockly.ALIGN_CENTRE&&(k+=n/2)}this.renderFields_(h.fieldRow,k,l);c.x=e.statementEdge+Blockly.BlockSvg.NOTCH_WIDTH;
 g.push("H",c.x);g.push(Blockly.BlockSvg.INNER_TOP_LEFT_CORNER);g.push("v",b.height-2*Blockly.BlockSvg.CORNER_RADIUS);g.push(Blockly.BlockSvg.INNER_BOTTOM_LEFT_CORNER);g.push("H",e.rightEdge);this.RTL?(a.push("M",c.x-Blockly.BlockSvg.NOTCH_WIDTH+Blockly.BlockSvg.DISTANCE_45_OUTSIDE+","+(c.y+Blockly.BlockSvg.DISTANCE_45_OUTSIDE)),a.push(Blockly.BlockSvg.INNER_TOP_LEFT_CORNER_HIGHLIGHT_RTL),a.push("v",b.height-2*Blockly.BlockSvg.CORNER_RADIUS),a.push(Blockly.BlockSvg.INNER_BOTTOM_LEFT_CORNER_HIGHLIGHT_RTL)):
 (a.push("M",c.x-Blockly.BlockSvg.NOTCH_WIDTH+Blockly.BlockSvg.DISTANCE_45_OUTSIDE+","+(c.y+b.height-Blockly.BlockSvg.DISTANCE_45_OUTSIDE)),a.push(Blockly.BlockSvg.INNER_BOTTOM_LEFT_CORNER_HIGHLIGHT_LTR));a.push("H",e.rightEdge-.5);d.x=this.RTL?-c.x:c.x+1;h.connection.setOffsetInBlock(d.x,c.y+1);h.connection.isConnected()&&(this.width=Math.max(this.width,e.statementEdge+h.connection.targetBlock().getHeightWidth().width));if(f==e.length-1||e[f+1].type==Blockly.NEXT_STATEMENT)g.push("v",Blockly.BlockSvg.SEP_SPACE_Y),
-this.RTL&&a.push("v",Blockly.BlockSvg.SEP_SPACE_Y-1),c.y+=Blockly.BlockSvg.SEP_SPACE_Y};Blockly.Msg={};goog.getMsgOrig=goog.getMsg;goog.getMsg=function(a,b){var c=goog.getMsg.blocklyMsgMap[a];c&&(a=Blockly.Msg[c]);return goog.getMsgOrig(a,b)};goog.getMsg.blocklyMsgMap={Today:"TODAY"};Blockly.FieldTextInput=function(a,b){Blockly.FieldTextInput.superClass_.constructor.call(this,a,b)};goog.inherits(Blockly.FieldTextInput,Blockly.Field);Blockly.FieldTextInput.fromJson=function(a){var b=Blockly.utils.replaceMessageReferences(a.text);b=new Blockly.FieldTextInput(b,a["class"]);"boolean"===typeof a.spellcheck&&b.setSpellcheck(a.spellcheck);return b};Blockly.FieldTextInput.FONTSIZE=11;Blockly.FieldTextInput.htmlInput_=null;Blockly.FieldTextInput.prototype.CURSOR="text";
+this.RTL&&a.push("v",Blockly.BlockSvg.SEP_SPACE_Y-1),c.y+=Blockly.BlockSvg.SEP_SPACE_Y};Blockly.BlockSvg.prototype.positionNewBlock=function(a,b,c){b.type!=Blockly.NEXT_STATEMENT&&b.type!=Blockly.INPUT_VALUE||a.moveBy(c.x_-b.x_,c.y_-b.y_)};Blockly.BlockSvg.prototype.highlightForReplacement=function(a){a?Blockly.utils.addClass(this.svgGroup_,"blocklyReplaceable"):Blockly.utils.removeClass(this.svgGroup_,"blocklyReplaceable")};Blockly.Msg={};goog.getMsgOrig=goog.getMsg;goog.getMsg=function(a,b){var c=goog.getMsg.blocklyMsgMap[a];c&&(a=Blockly.Msg[c]);return goog.getMsgOrig(a,b)};goog.getMsg.blocklyMsgMap={Today:"TODAY"};Blockly.FieldTextInput=function(a,b){Blockly.FieldTextInput.superClass_.constructor.call(this,a,b)};goog.inherits(Blockly.FieldTextInput,Blockly.Field);Blockly.FieldTextInput.fromJson=function(a){var b=Blockly.utils.replaceMessageReferences(a.text);b=new Blockly.FieldTextInput(b,a["class"]);"boolean"===typeof a.spellcheck&&b.setSpellcheck(a.spellcheck);return b};Blockly.FieldTextInput.FONTSIZE=11;Blockly.FieldTextInput.htmlInput_=null;Blockly.FieldTextInput.prototype.CURSOR="text";
 Blockly.FieldTextInput.prototype.spellcheck_=!0;Blockly.FieldTextInput.prototype.dispose=function(){Blockly.WidgetDiv.hideIfOwner(this);Blockly.FieldTextInput.superClass_.dispose.call(this)};Blockly.FieldTextInput.prototype.setValue=function(a){if(null!==a){if(this.sourceBlock_){var b=this.callValidator(a);null!==b&&(a=b)}Blockly.Field.prototype.setValue.call(this,a)}};
 Blockly.FieldTextInput.prototype.setText=function(a){null!==a&&(a=String(a),a!==this.text_&&(this.sourceBlock_&&Blockly.Events.isEnabled()&&Blockly.Events.fire(new Blockly.Events.BlockChange(this.sourceBlock_,"field",this.name,this.text_,a)),Blockly.Field.prototype.setText.call(this,a)))};Blockly.FieldTextInput.prototype.setSpellcheck=function(a){this.spellcheck_=a};
 Blockly.FieldTextInput.prototype.showEditor_=function(a){this.workspace_=this.sourceBlock_.workspace;a=a||!1;!a&&(goog.userAgent.MOBILE||goog.userAgent.ANDROID||goog.userAgent.IPAD)?this.showPromptEditor_():this.showInlineEditor_(a)};Blockly.FieldTextInput.prototype.showPromptEditor_=function(){var a=this;Blockly.prompt(Blockly.Msg.CHANGE_VALUE_TITLE,this.text_,function(b){a.sourceBlock_&&(b=a.callValidator(b));a.setValue(b)})};
@@ -1500,7 +1510,7 @@ Blockly.FieldTextInput.prototype.showInlineEditor_=function(a){Blockly.WidgetDiv
 a||(c.focus(),c.select());this.bindEvents_(c)};Blockly.FieldTextInput.prototype.bindEvents_=function(a){a.onKeyDownWrapper_=Blockly.bindEventWithChecks_(a,"keydown",this,this.onHtmlInputKeyDown_);a.onKeyUpWrapper_=Blockly.bindEventWithChecks_(a,"keyup",this,this.onHtmlInputChange_);a.onKeyPressWrapper_=Blockly.bindEventWithChecks_(a,"keypress",this,this.onHtmlInputChange_);a.onWorkspaceChangeWrapper_=this.resizeEditor_.bind(this);this.workspace_.addChangeListener(a.onWorkspaceChangeWrapper_)};
 Blockly.FieldTextInput.prototype.unbindEvents_=function(a){Blockly.unbindEvent_(a.onKeyDownWrapper_);Blockly.unbindEvent_(a.onKeyUpWrapper_);Blockly.unbindEvent_(a.onKeyPressWrapper_);this.workspace_.removeChangeListener(a.onWorkspaceChangeWrapper_)};
 Blockly.FieldTextInput.prototype.onHtmlInputKeyDown_=function(a){var b=Blockly.FieldTextInput.htmlInput_;13==a.keyCode?Blockly.WidgetDiv.hide():27==a.keyCode?(b.value=b.defaultValue,Blockly.WidgetDiv.hide()):9==a.keyCode&&(Blockly.WidgetDiv.hide(),this.sourceBlock_.tab(this,!a.shiftKey),a.preventDefault())};
-Blockly.FieldTextInput.prototype.onHtmlInputChange_=function(a){a=Blockly.FieldTextInput.htmlInput_;var b=a.value;b!==a.oldValue_?(a.oldValue_=b,this.setValue(b),this.validate_()):goog.userAgent.WEBKIT&&this.sourceBlock_.render();this.resizeEditor_();Blockly.svgResize(this.sourceBlock_.workspace)};
+Blockly.FieldTextInput.prototype.onHtmlInputChange_=function(a){a=Blockly.FieldTextInput.htmlInput_;var b=a.value;b!==a.oldValue_?(a.oldValue_=b,Blockly.Events.setGroup(!0),this.setValue(b),Blockly.Events.setGroup(!1),this.validate_()):goog.userAgent.WEBKIT&&this.sourceBlock_.render();this.resizeEditor_();Blockly.svgResize(this.sourceBlock_.workspace)};
 Blockly.FieldTextInput.prototype.validate_=function(){var a=!0;if(!Blockly.FieldTextInput.htmlInput_)throw Error("htmlInput not defined");var b=Blockly.FieldTextInput.htmlInput_;this.sourceBlock_&&(a=this.callValidator(b.value));null===a?Blockly.utils.addClass(b,"blocklyInvalidInput"):Blockly.utils.removeClass(b,"blocklyInvalidInput")};
 Blockly.FieldTextInput.prototype.resizeEditor_=function(){var a=Blockly.WidgetDiv.DIV,b=this.getScaledBBox_();a.style.width=b.right-b.left+"px";a.style.height=b.bottom-b.top+"px";b=new goog.math.Coordinate(this.sourceBlock_.RTL?b.right-a.offsetWidth:b.left,b.top);b.y+=1;goog.userAgent.GECKO&&Blockly.WidgetDiv.DIV.style.top&&(--b.x,--b.y);goog.userAgent.WEBKIT&&(b.y-=3);a.style.left=b.x+"px";a.style.top=b.y+"px"};
 Blockly.FieldTextInput.prototype.widgetDispose_=function(){var a=this;return function(){var b=Blockly.FieldTextInput.htmlInput_;a.maybeSaveEdit_();a.unbindEvents_(b);Blockly.FieldTextInput.htmlInput_=null;Blockly.Events.setGroup(!1);b=Blockly.WidgetDiv.DIV.style;b.width="auto";b.height="auto";b.fontSize=""}};
@@ -1543,7 +1553,7 @@ Blockly.FieldDropdown.prototype.renderSelectedImage_=function(){this.imageElemen
 a;this.sourceBlock_.RTL?(this.imageElement_.setAttribute("x",a),this.textElement_.setAttribute("x",-1)):(this.textElement_.setAttribute("text-anchor","end"),this.textElement_.setAttribute("x",this.size_.width+1))};
 Blockly.FieldDropdown.prototype.renderSelectedText_=function(){var a=document.createTextNode(this.getDisplayText_());this.textElement_.appendChild(a);this.sourceBlock_.RTL?this.textElement_.insertBefore(this.arrow_,this.textElement_.firstChild):this.textElement_.appendChild(this.arrow_);this.textElement_.setAttribute("text-anchor","start");this.textElement_.setAttribute("x",0);this.size_.height=Blockly.BlockSvg.MIN_BLOCK_Y;this.size_.width=Blockly.Field.getCachedWidth(this.textElement_)};
 Blockly.FieldDropdown.prototype.updateWidth=function(){if(this.imageJson_&&(goog.userAgent.IE||goog.userAgent.EDGE)){var a=Blockly.Field.getCachedWidth(this.arrow_);a=Number(this.imageJson_.width)+a+Blockly.BlockSvg.SEP_SPACE_X;this.borderRect_&&this.borderRect_.setAttribute("width",a);this.size_.width=a}else Blockly.Field.prototype.updateWidth.call(this)};Blockly.FieldDropdown.prototype.dispose=function(){Blockly.WidgetDiv.hideIfOwner(this);Blockly.FieldDropdown.superClass_.dispose.call(this)};
-Blockly.FieldDropdown.validateOptions_=function(a){if(!Array.isArray(a))throw TypeError("FieldDropdown options must be an array.");for(var b=!1,c=0;c<a.length;++c){var d=a[c];Array.isArray(a)?"string"!=typeof d[1]?(b=!0,console.error("Invalid option["+c+"]: Each FieldDropdown option id must be a string. Found "+d[1]+" in: ",d)):"string"!=typeof d[0]&&"string"!=typeof d[0].src&&(b=!0,console.error("Invalid option["+c+"]: Each FieldDropdown option must have a string label or image description. Found"+
+Blockly.FieldDropdown.validateOptions_=function(a){if(!Array.isArray(a))throw TypeError("FieldDropdown options must be an array.");for(var b=!1,c=0;c<a.length;++c){var d=a[c];Array.isArray(d)?"string"!=typeof d[1]?(b=!0,console.error("Invalid option["+c+"]: Each FieldDropdown option id must be a string. Found "+d[1]+" in: ",d)):"string"!=typeof d[0]&&"string"!=typeof d[0].src&&(b=!0,console.error("Invalid option["+c+"]: Each FieldDropdown option must have a string label or image description. Found"+
 d[0]+" in: ",d)):(b=!0,console.error("Invalid option["+c+"]: Each FieldDropdown option must be an array. Found: ",d))}if(b)throw TypeError("Found invalid FieldDropdown options.");};Blockly.Field.register("field_dropdown",Blockly.FieldDropdown);Blockly.FieldImage=function(a,b,c,d,e){this.sourceBlock_=null;this.height_=Number(c);this.width_=Number(b);this.size_=new goog.math.Size(this.width_,this.height_+2*Blockly.BlockSvg.INLINE_PADDING_Y);this.text_=d||"";this.tooltip_="";this.setValue(a);"function"==typeof e&&(this.clickHandler_=e)};goog.inherits(Blockly.FieldImage,Blockly.Field);
 Blockly.FieldImage.fromJson=function(a){var b=Blockly.utils.replaceMessageReferences(a.src),c=Number(Blockly.utils.replaceMessageReferences(a.width)),d=Number(Blockly.utils.replaceMessageReferences(a.height));a=Blockly.utils.replaceMessageReferences(a.alt);return new Blockly.FieldImage(b,c,d,a)};Blockly.FieldImage.prototype.EDITABLE=!1;
 Blockly.FieldImage.prototype.init=function(){this.fieldGroup_||(this.fieldGroup_=Blockly.utils.createSvgElement("g",{},null),this.visible_||(this.fieldGroup_.style.display="none"),this.imageElement_=Blockly.utils.createSvgElement("image",{height:this.height_+"px",width:this.width_+"px"},this.fieldGroup_),this.setValue(this.src_),this.sourceBlock_.getSvgRoot().appendChild(this.fieldGroup_),this.tooltip_?this.imageElement_.tooltip=this.tooltip_:this.setTooltip(this.sourceBlock_),Blockly.Tooltip.bindMouseEvents(this.imageElement_),
@@ -1563,8 +1573,8 @@ Blockly.Msg.DELETE_VARIABLE&&b.push([Blockly.Msg.DELETE_VARIABLE.replace("%1",a)
 Blockly.FieldVariable.prototype.referencesVariables=function(){return!0};Blockly.Field.register("field_variable",Blockly.FieldVariable);Blockly.Generator=function(a){this.name_=a;this.FUNCTION_NAME_PLACEHOLDER_REGEXP_=new RegExp(this.FUNCTION_NAME_PLACEHOLDER_,"g")};Blockly.Generator.NAME_TYPE="generated_function";Blockly.Generator.prototype.INFINITE_LOOP_TRAP=null;Blockly.Generator.prototype.STATEMENT_PREFIX=null;Blockly.Generator.prototype.INDENT="  ";Blockly.Generator.prototype.COMMENT_WRAP=60;Blockly.Generator.prototype.ORDER_OVERRIDES=[];
 Blockly.Generator.prototype.workspaceToCode=function(a){a||(console.warn("No workspace specified in workspaceToCode call.  Guessing."),a=Blockly.getMainWorkspace());var b=[];this.init(a);a=a.getTopBlocks(!0);for(var c=0,d;d=a[c];c++){var e=this.blockToCode(d);Array.isArray(e)&&(e=e[0]);e&&(d.outputConnection&&(e=this.scrubNakedValue(e)),b.push(e))}b=b.join("\n");b=this.finish(b);b=b.replace(/^\s+\n/,"");b=b.replace(/\n\s+$/,"\n");return b=b.replace(/[ \t]+\n/g,"\n")};
 Blockly.Generator.prototype.prefixLines=function(a,b){return b+a.replace(/(?!\n$)\n/g,"\n"+b)};Blockly.Generator.prototype.allNestedComments=function(a){var b=[];a=a.getDescendants(!0);for(var c=0;c<a.length;c++){var d=a[c].getCommentText();d&&b.push(d)}b.length&&b.push("");return b.join("\n")};
-Blockly.Generator.prototype.blockToCode=function(a){if(!a)return"";if(a.disabled)return this.blockToCode(a.getNextBlock());var b=this[a.type];if("function"!=typeof b)throw Error('Language "'+this.name_+'" does not know how to generate  code for block type "'+a.type+'".');b=b.call(a,a);if(Array.isArray(b)){if(!a.outputConnection)throw TypeError("Expecting string from statement block: "+a.type);return[this.scrub_(a,b[0]),b[1]]}if("string"==typeof b){var c=a.id.replace(/\$/g,"$$$$");this.STATEMENT_PREFIX&&
-(b=this.STATEMENT_PREFIX.replace(/%1/g,"'"+c+"'")+b);return this.scrub_(a,b)}if(null===b)return"";throw SyntaxError("Invalid code generated: "+b);};
+Blockly.Generator.prototype.blockToCode=function(a,b){if(!a)return"";if(a.disabled)return b?"":this.blockToCode(a.getNextBlock());var c=this[a.type];if("function"!=typeof c)throw Error('Language "'+this.name_+'" does not know how to generate  code for block type "'+a.type+'".');c=c.call(a,a);if(Array.isArray(c)){if(!a.outputConnection)throw TypeError("Expecting string from statement block: "+a.type);return[this.scrub_(a,c[0],b),c[1]]}if("string"==typeof c){var d=a.id.replace(/\$/g,"$$$$");this.STATEMENT_PREFIX&&
+(c=this.STATEMENT_PREFIX.replace(/%1/g,"'"+d+"'")+c);return this.scrub_(a,c,b)}if(null===c)return"";throw SyntaxError("Invalid code generated: "+c);};
 Blockly.Generator.prototype.valueToCode=function(a,b,c){if(isNaN(c))throw TypeError("Expecting valid order from block: "+a.type);var d=a.getInputTargetBlock(b);if(!d)return"";b=this.blockToCode(d);if(""===b)return"";if(!Array.isArray(b))throw TypeError("Expecting tuple from value block: "+d.type);a=b[0];b=b[1];if(isNaN(b))throw TypeError("Expecting valid order from value block: "+d.type);if(!a)return"";d=!1;var e=Math.floor(c),f=Math.floor(b);if(e<=f&&(e!=f||0!=e&&99!=e))for(d=!0,e=0;e<this.ORDER_OVERRIDES.length;e++)if(this.ORDER_OVERRIDES[e][0]==
 c&&this.ORDER_OVERRIDES[e][1]==b){d=!1;break}d&&(a="("+a+")");return a};Blockly.Generator.prototype.statementToCode=function(a,b){a=a.getInputTargetBlock(b);b=this.blockToCode(a);if("string"!=typeof b)throw TypeError("Expecting code from statement block: "+(a&&a.type));b&&(b=this.prefixLines(b,this.INDENT));return b};
 Blockly.Generator.prototype.addLoopTrap=function(a,b){b=b.replace(/\$/g,"$$$$");this.INFINITE_LOOP_TRAP&&(a=this.INFINITE_LOOP_TRAP.replace(/%1/g,"'"+b+"'")+a);this.STATEMENT_PREFIX&&(a+=this.prefixLines(this.STATEMENT_PREFIX.replace(/%1/g,"'"+b+"'"),this.INDENT));return a};Blockly.Generator.prototype.RESERVED_WORDS_="";Blockly.Generator.prototype.addReservedWords=function(a){this.RESERVED_WORDS_+=a+","};Blockly.Generator.prototype.FUNCTION_NAME_PLACEHOLDER_="{leCUI8hutHZI4480Dc}";
@@ -1607,7 +1617,7 @@ Blockly.Flyout.prototype.createBlock=function(a){var b=null;Blockly.Events.disab
 this.autoClose?this.hide():this.filterForCapacity_();return b};Blockly.Flyout.prototype.initFlyoutButton_=function(a,b,c){var d=a.createDom();a.moveTo(b,c);a.show();this.listeners_.push(Blockly.bindEventWithChecks_(d,"mousedown",this,this.onMouseDown_));this.buttons_.push(a)};
 Blockly.Flyout.prototype.createRect_=function(a,b,c,d,e){b=Blockly.utils.createSvgElement("rect",{"fill-opacity":0,x:b,y:c,height:d.height,width:d.width},null);b.tooltip=a;Blockly.Tooltip.bindMouseEvents(b);this.workspace_.getCanvas().insertBefore(b,a.getSvgRoot());a.flyoutRect_=b;return this.mats_[e]=b};
 Blockly.Flyout.prototype.moveRectToBlock_=function(a,b){var c=b.getHeightWidth();a.setAttribute("width",c.width);a.setAttribute("height",c.height);var d=b.startHat_?Blockly.BlockSvg.START_HAT_HEIGHT:0;d&&b.moveBy(0,d);d=b.outputConnection?Blockly.BlockSvg.TAB_WIDTH:0;b=b.getRelativeToSurfaceXY();a.setAttribute("y",b.y);a.setAttribute("x",this.RTL?b.x-c.width+d:b.x-d)};
-Blockly.Flyout.prototype.filterForCapacity_=function(){for(var a=this.targetWorkspace_.remainingCapacity(),b=this.workspace_.getTopBlocks(!1),c=0,d;d=b[c];c++)if(-1==this.permanentlyDisabled_.indexOf(d)){var e=d.getDescendants(!1);d.setDisabled(e.length>a)}};Blockly.Flyout.prototype.reflow=function(){this.reflowWrapper_&&this.workspace_.removeChangeListener(this.reflowWrapper_);this.reflowInternal_();this.reflowWrapper_&&this.workspace_.addChangeListener(this.reflowWrapper_)};
+Blockly.Flyout.prototype.filterForCapacity_=function(){for(var a=this.workspace_.getTopBlocks(!1),b=0,c;c=a[b];b++)-1==this.permanentlyDisabled_.indexOf(c)&&c.setDisabled(!this.targetWorkspace_.isCapacityAvailable(Blockly.utils.getBlockTypeCounts(c)))};Blockly.Flyout.prototype.reflow=function(){this.reflowWrapper_&&this.workspace_.removeChangeListener(this.reflowWrapper_);this.reflowInternal_();this.reflowWrapper_&&this.workspace_.addChangeListener(this.reflowWrapper_)};
 Blockly.Flyout.prototype.isScrollable=function(){return this.scrollbar_?this.scrollbar_.isVisible():!1};
 Blockly.Flyout.prototype.placeNewBlock_=function(a){var b=this.targetWorkspace_;if(!a.getSvgRoot())throw Error("oldBlock is not rendered.");var c=Blockly.Xml.blockToDom(a);b.setResizesEnabled(!1);c=Blockly.Xml.domToBlock(c,b);if(!c.getSvgRoot())throw Error("block is not rendered.");var d=b.getOriginOffsetInPixels(),e=this.workspace_.getOriginOffsetInPixels();a=a.getRelativeToSurfaceXY().scale(this.workspace_.scale);a=goog.math.Coordinate.sum(e,a);b=goog.math.Coordinate.difference(a,d).scale(1/b.scale);
 c.moveBy(b.x,b.y);return c};Blockly.HorizontalFlyout=function(a){a.getMetrics=this.getMetrics_.bind(this);a.setMetrics=this.setMetrics_.bind(this);Blockly.HorizontalFlyout.superClass_.constructor.call(this,a);this.horizontalLayout_=!0};goog.inherits(Blockly.HorizontalFlyout,Blockly.Flyout);
@@ -1658,25 +1668,26 @@ Blockly.Css.CONTENT=[".blocklySvg {","background-color: #fff;","outline: none;",
 "color: #000;","display: none;","font-family: sans-serif;","font-size: 9pt;","opacity: .9;","padding: 2px;","position: absolute;","z-index: 100000;","}",".blocklyResizeSE {","cursor: se-resize;","fill: #aaa;","}",".blocklyResizeSW {","cursor: sw-resize;","fill: #aaa;","}",".blocklyResizeLine {","stroke: #515A5A;","stroke-width: 1;","}",".blocklyHighlightedConnectionPath {","fill: none;","stroke: #fc3;","stroke-width: 4px;","}",".blocklyPathLight {","fill: none;","stroke-linecap: round;","stroke-width: 1;",
 "}",".blocklySelected>.blocklyPath {","stroke: #fc3;","stroke-width: 3px;","}",".blocklySelected>.blocklyPathLight {","display: none;","}",".blocklyDraggable {",'cursor: url("<<<PATH>>>/handopen.cur"), auto;',"cursor: grab;","cursor: -webkit-grab;","}",".blocklyDragging {",'cursor: url("<<<PATH>>>/handclosed.cur"), auto;',"cursor: grabbing;","cursor: -webkit-grabbing;","}",".blocklyDraggable:active {",'cursor: url("<<<PATH>>>/handclosed.cur"), auto;',"cursor: grabbing;","cursor: -webkit-grabbing;",
 "}",".blocklyBlockDragSurface .blocklyDraggable {",'cursor: url("<<<PATH>>>/handclosed.cur"), auto;',"cursor: grabbing;","cursor: -webkit-grabbing;","}",".blocklyDragging.blocklyDraggingDelete {",'cursor: url("<<<PATH>>>/handdelete.cur"), auto;',"}",".blocklyToolboxDelete {",'cursor: url("<<<PATH>>>/handdelete.cur"), auto;',"}",".blocklyToolboxGrab {",'cursor: url("<<<PATH>>>/handclosed.cur"), auto;',"cursor: grabbing;","cursor: -webkit-grabbing;","}",".blocklyDragging>.blocklyPath,",".blocklyDragging>.blocklyPathLight {",
-"fill-opacity: .8;","stroke-opacity: .8;","}",".blocklyDragging>.blocklyPathDark {","display: none;","}",".blocklyDisabled>.blocklyPath {","fill-opacity: .5;","stroke-opacity: .5;","}",".blocklyDisabled>.blocklyPathLight,",".blocklyDisabled>.blocklyPathDark {","display: none;","}",".blocklyText {","cursor: default;","fill: #fff;","font-family: sans-serif;","font-size: 11pt;","}",".blocklyNonEditableText>text {","pointer-events: none;","}",".blocklyNonEditableText>rect,",".blocklyEditableText>rect {",
-"fill: #fff;","fill-opacity: .6;","}",".blocklyNonEditableText>text,",".blocklyEditableText>text {","fill: #000;","}",".blocklyEditableText:hover>rect {","stroke: #fff;","stroke-width: 2;","}",".blocklyBubbleText {","fill: #000;","}",".blocklyFlyout {","position: absolute;","z-index: 20;","}",".blocklyFlyoutButton {","fill: #888;","cursor: default;","}",".blocklyFlyoutButtonShadow {","fill: #666;","}",".blocklyFlyoutButton:hover {","fill: #aaa;","}",".blocklyFlyoutLabel {","cursor: default;","}",
-".blocklyFlyoutLabelBackground {","opacity: 0;","}",".blocklyFlyoutLabelText {","fill: #000;","}",".blocklySvg text, .blocklyBlockDragSurface text {","user-select: none;","-moz-user-select: none;","-ms-user-select: none;","-webkit-user-select: none;","cursor: inherit;","}",".blocklyHidden {","display: none;","}",".blocklyFieldDropdown:not(.blocklyHidden) {","display: block;","}",".blocklyIconGroup {","cursor: default;","}",".blocklyIconGroup:not(:hover),",".blocklyIconGroupReadonly {","opacity: .6;",
-"}",".blocklyIconShape {","fill: #00f;","stroke: #fff;","stroke-width: 1px;","}",".blocklyIconSymbol {","fill: #fff;","}",".blocklyMinimalBody {","margin: 0;","padding: 0;","}",".blocklyCommentForeignObject {","position: relative;","z-index: 0;","}",".blocklyCommentRect {","fill: #E7DE8E;","stroke: #bcA903;","stroke-width: 1px","}",".blocklyCommentTarget {","fill: transparent;","stroke: #bcA903;","}",".blocklyCommentTargetFocused {","fill: none;","}",".blocklyCommentHandleTarget {","fill: none;",
-"}",".blocklyCommentHandleTargetFocused {","fill: transparent;","}",".blocklyFocused>.blocklyCommentRect {","fill: #B9B272;","stroke: #B9B272;","}",".blocklySelected>.blocklyCommentTarget {","stroke: #fc3;","stroke-width: 3px;","}",".blocklyCommentTextarea {","background-color: #fef49c;","border: 0;","outline: 0;","margin: 0;","padding: 3px;","resize: none;","display: block;","overflow: hidden;","}",".blocklyCommentDeleteIcon {","cursor: pointer;","fill: #000;","display: none","}",".blocklySelected > .blocklyCommentDeleteIcon {",
-"display: block","}",".blocklyDeleteIconShape {","fill: #000;","stroke: #000;","stroke-width: 1px;","}",".blocklyDeleteIconShape.blocklyDeleteIconHighlighted {","stroke: #fc3;","}",".blocklyHtmlInput {","border: none;","border-radius: 4px;","font-family: sans-serif;","height: 100%;","margin: 0;","outline: none;","padding: 0 1px;","width: 100%","}",".blocklyMainBackground {","stroke-width: 1;","stroke: #c6c6c6;","}",".blocklyMutatorBackground {","fill: #fff;","stroke: #ddd;","stroke-width: 1;","}",
-".blocklyFlyoutBackground {","fill: #ddd;","fill-opacity: .8;","}",".blocklyTransparentBackground {","opacity: 0;","}",".blocklyMainWorkspaceScrollbar {","z-index: 20;","}",".blocklyFlyoutScrollbar {","z-index: 30;","}",".blocklyScrollbarHorizontal, .blocklyScrollbarVertical {","position: absolute;","outline: none;","}",".blocklyScrollbarBackground {","opacity: 0;","}",".blocklyScrollbarHandle {","fill: #ccc;","}",".blocklyScrollbarBackground:hover+.blocklyScrollbarHandle,",".blocklyScrollbarHandle:hover {",
-"fill: #bbb;","}",".blocklyZoom>image {","opacity: .4;","}",".blocklyZoom>image:hover {","opacity: .6;","}",".blocklyZoom>image:active {","opacity: .8;","}",".blocklyFlyout .blocklyScrollbarHandle {","fill: #bbb;","}",".blocklyFlyout .blocklyScrollbarBackground:hover+.blocklyScrollbarHandle,",".blocklyFlyout .blocklyScrollbarHandle:hover {","fill: #aaa;","}",".blocklyInvalidInput {","background: #faa;","}",".blocklyAngleCircle {","stroke: #444;","stroke-width: 1;","fill: #ddd;","fill-opacity: .8;",
-"}",".blocklyAngleMarks {","stroke: #444;","stroke-width: 1;","}",".blocklyAngleGauge {","fill: #f88;","fill-opacity: .8;","}",".blocklyAngleLine {","stroke: #f00;","stroke-width: 2;","stroke-linecap: round;","pointer-events: none;","}",".blocklyContextMenu {","border-radius: 4px;","}",".blocklyDropdownMenu {","padding: 0 !important;","}",".blocklyWidgetDiv .goog-option-selected .goog-menuitem-checkbox,",".blocklyWidgetDiv .goog-option-selected .goog-menuitem-icon {","background: url(<<<PATH>>>/sprites.png) no-repeat -48px -16px !important;",
-"}",".blocklyToolboxDiv {","background-color: #ddd;","overflow-x: visible;","overflow-y: auto;","position: absolute;","user-select: none;","-moz-user-select: none;","-ms-user-select: none;","-webkit-user-select: none;","z-index: 70;","-webkit-tap-highlight-color: transparent;","}",".blocklyTreeRoot {","padding: 4px 0;","}",".blocklyTreeRoot:focus {","outline: none;","}",".blocklyTreeRow {","height: 22px;","line-height: 22px;","margin-bottom: 3px;","padding-right: 8px;","white-space: nowrap;","}",
-".blocklyHorizontalTree {","float: left;","margin: 1px 5px 8px 0;","}",".blocklyHorizontalTreeRtl {","float: right;","margin: 1px 0 8px 5px;","}",'.blocklyToolboxDiv[dir="RTL"] .blocklyTreeRow {',"margin-left: 8px;","}",".blocklyTreeRow:not(.blocklyTreeSelected):hover {","background-color: #e4e4e4;","}",".blocklyTreeSeparator {","border-bottom: solid #e5e5e5 1px;","height: 0;","margin: 5px 0;","}",".blocklyTreeSeparatorHorizontal {","border-right: solid #e5e5e5 1px;","width: 0;","padding: 5px 0;",
-"margin: 0 5px;","}",".blocklyTreeIcon {","background-image: url(<<<PATH>>>/sprites.png);","height: 16px;","vertical-align: middle;","width: 16px;","}",".blocklyTreeIconClosedLtr {","background-position: -32px -1px;","}",".blocklyTreeIconClosedRtl {","background-position: 0 -1px;","}",".blocklyTreeIconOpen {","background-position: -16px -1px;","}",".blocklyTreeSelected>.blocklyTreeIconClosedLtr {","background-position: -32px -17px;","}",".blocklyTreeSelected>.blocklyTreeIconClosedRtl {","background-position: 0 -17px;",
-"}",".blocklyTreeSelected>.blocklyTreeIconOpen {","background-position: -16px -17px;","}",".blocklyTreeIconNone,",".blocklyTreeSelected>.blocklyTreeIconNone {","background-position: -48px -1px;","}",".blocklyTreeLabel {","cursor: default;","font-family: sans-serif;","font-size: 16px;","padding: 0 3px;","vertical-align: middle;","}",".blocklyToolboxDelete .blocklyTreeLabel {",'cursor: url("<<<PATH>>>/handdelete.cur"), auto;',"}",".blocklyTreeSelected .blocklyTreeLabel {","color: #fff;","}",".blocklyColourTable {",
-"border-collapse: collapse;","}",".blocklyColourTable>tr>td {","border: 1px solid #666;","padding: 0;","}",".blocklyColourTable>tr>td>div {","border: 1px solid #666;","height: 13px;","width: 15px;","}",".blocklyColourTable>tr>td>div:hover {","border: 1px solid #fff;","}",".blocklyColourSelected, .blocklyColourSelected:hover {","border: 1px solid #000 !important;","}",".blocklyWidgetDiv .goog-menu {","background: #fff;","border-color: #ccc #666 #666 #ccc;","border-style: solid;","border-width: 1px;",
-"cursor: default;","font: normal 13px Arial, sans-serif;","margin: 0;","outline: none;","padding: 4px 0;","position: absolute;","overflow-y: auto;","overflow-x: hidden;","max-height: 100%;","z-index: 20000;","}",".blocklyWidgetDiv .goog-menuitem {","color: #000;","font: normal 13px Arial, sans-serif;","list-style: none;","margin: 0;","padding: 4px 7em 4px 28px;","white-space: nowrap;","}",".blocklyWidgetDiv .goog-menuitem.goog-menuitem-rtl {","padding-left: 7em;","padding-right: 28px;","}",".blocklyWidgetDiv .goog-menu-nocheckbox .goog-menuitem,",
-".blocklyWidgetDiv .goog-menu-noicon .goog-menuitem {","padding-left: 12px;","}",".blocklyWidgetDiv .goog-menu-noaccel .goog-menuitem {","padding-right: 20px;","}",".blocklyWidgetDiv .goog-menuitem-content {","color: #000;","font: normal 13px Arial, sans-serif;","}",".blocklyWidgetDiv .goog-menuitem-disabled .goog-menuitem-accel,",".blocklyWidgetDiv .goog-menuitem-disabled .goog-menuitem-content {","color: #ccc !important;","}",".blocklyWidgetDiv .goog-menuitem-disabled .goog-menuitem-icon {","opacity: 0.3;",
-"filter: alpha(opacity=30);","}",".blocklyWidgetDiv .goog-menuitem-highlight,",".blocklyWidgetDiv .goog-menuitem-hover {","background-color: #d6e9f8;","border-color: #d6e9f8;","border-style: dotted;","border-width: 1px 0;","padding-bottom: 3px;","padding-top: 3px;","}",".blocklyWidgetDiv .goog-menuitem-checkbox,",".blocklyWidgetDiv .goog-menuitem-icon {","background-repeat: no-repeat;","height: 16px;","left: 6px;","position: absolute;","right: auto;","vertical-align: middle;","width: 16px;","}",".blocklyWidgetDiv .goog-menuitem-rtl .goog-menuitem-checkbox,",
-".blocklyWidgetDiv .goog-menuitem-rtl .goog-menuitem-icon {","left: auto;","right: 6px;","}",".blocklyWidgetDiv .goog-option-selected .goog-menuitem-checkbox,",".blocklyWidgetDiv .goog-option-selected .goog-menuitem-icon {","background: url(//ssl.gstatic.com/editor/editortoolbar.png) no-repeat -512px 0;","}",".blocklyWidgetDiv .goog-menuitem-accel {","color: #999;","direction: ltr;","left: auto;","padding: 0 6px;","position: absolute;","right: 0;","text-align: right;","}",".blocklyWidgetDiv .goog-menuitem-rtl .goog-menuitem-accel {",
-"left: 0;","right: auto;","text-align: left;","}",".blocklyWidgetDiv .goog-menuitem-mnemonic-hint {","text-decoration: underline;","}",".blocklyWidgetDiv .goog-menuitem-mnemonic-separator {","color: #999;","font-size: 12px;","padding-left: 4px;","}",".blocklyWidgetDiv .goog-menuseparator {","border-top: 1px solid #ccc;","margin: 4px 0;","padding: 0;","}",""];Blockly.WidgetDiv={};Blockly.WidgetDiv.DIV=null;Blockly.WidgetDiv.owner_=null;Blockly.WidgetDiv.dispose_=null;Blockly.WidgetDiv.createDom=function(){Blockly.WidgetDiv.DIV||(Blockly.WidgetDiv.DIV=document.createElement("div"),Blockly.WidgetDiv.DIV.className="blocklyWidgetDiv",document.body.appendChild(Blockly.WidgetDiv.DIV))};
+"fill-opacity: .8;","stroke-opacity: .8;","}",".blocklyDragging>.blocklyPathDark {","display: none;","}",".blocklyDisabled>.blocklyPath {","fill-opacity: .5;","stroke-opacity: .5;","}",".blocklyDisabled>.blocklyPathLight,",".blocklyDisabled>.blocklyPathDark {","display: none;","}",".blocklyInsertionMarker>.blocklyPath,",".blocklyInsertionMarker>.blocklyPathLight,",".blocklyInsertionMarker>.blocklyPathDark {","fill-opacity: .2;","stroke: none","}",".blocklyReplaceable .blocklyPath {","fill-opacity: 0.5;",
+"}",".blocklyReplaceable .blocklyPathLight,",".blocklyReplaceable .blocklyPathDark {","display: none;","}",".blocklyText {","cursor: default;","fill: #fff;","font-family: sans-serif;","font-size: 11pt;","}",".blocklyNonEditableText>text {","pointer-events: none;","}",".blocklyNonEditableText>rect,",".blocklyEditableText>rect {","fill: #fff;","fill-opacity: .6;","}",".blocklyNonEditableText>text,",".blocklyEditableText>text {","fill: #000;","}",".blocklyEditableText:hover>rect {","stroke: #fff;","stroke-width: 2;",
+"}",".blocklyBubbleText {","fill: #000;","}",".blocklyFlyout {","position: absolute;","z-index: 20;","}",".blocklyFlyoutButton {","fill: #888;","cursor: default;","}",".blocklyFlyoutButtonShadow {","fill: #666;","}",".blocklyFlyoutButton:hover {","fill: #aaa;","}",".blocklyFlyoutLabel {","cursor: default;","}",".blocklyFlyoutLabelBackground {","opacity: 0;","}",".blocklyFlyoutLabelText {","fill: #000;","}",".blocklySvg text, .blocklyBlockDragSurface text {","user-select: none;","-moz-user-select: none;",
+"-ms-user-select: none;","-webkit-user-select: none;","cursor: inherit;","}",".blocklyHidden {","display: none;","}",".blocklyFieldDropdown:not(.blocklyHidden) {","display: block;","}",".blocklyIconGroup {","cursor: default;","}",".blocklyIconGroup:not(:hover),",".blocklyIconGroupReadonly {","opacity: .6;","}",".blocklyIconShape {","fill: #00f;","stroke: #fff;","stroke-width: 1px;","}",".blocklyIconSymbol {","fill: #fff;","}",".blocklyMinimalBody {","margin: 0;","padding: 0;","}",".blocklyCommentForeignObject {",
+"position: relative;","z-index: 0;","}",".blocklyCommentRect {","fill: #E7DE8E;","stroke: #bcA903;","stroke-width: 1px","}",".blocklyCommentTarget {","fill: transparent;","stroke: #bcA903;","}",".blocklyCommentTargetFocused {","fill: none;","}",".blocklyCommentHandleTarget {","fill: none;","}",".blocklyCommentHandleTargetFocused {","fill: transparent;","}",".blocklyFocused>.blocklyCommentRect {","fill: #B9B272;","stroke: #B9B272;","}",".blocklySelected>.blocklyCommentTarget {","stroke: #fc3;","stroke-width: 3px;",
+"}",".blocklyCommentTextarea {","background-color: #fef49c;","border: 0;","outline: 0;","margin: 0;","padding: 3px;","resize: none;","display: block;","overflow: hidden;","}",".blocklyCommentDeleteIcon {","cursor: pointer;","fill: #000;","display: none","}",".blocklySelected > .blocklyCommentDeleteIcon {","display: block","}",".blocklyDeleteIconShape {","fill: #000;","stroke: #000;","stroke-width: 1px;","}",".blocklyDeleteIconShape.blocklyDeleteIconHighlighted {","stroke: #fc3;","}",".blocklyHtmlInput {",
+"border: none;","border-radius: 4px;","font-family: sans-serif;","height: 100%;","margin: 0;","outline: none;","padding: 0 1px;","width: 100%","}",".blocklyMainBackground {","stroke-width: 1;","stroke: #c6c6c6;","}",".blocklyMutatorBackground {","fill: #fff;","stroke: #ddd;","stroke-width: 1;","}",".blocklyFlyoutBackground {","fill: #ddd;","fill-opacity: .8;","}",".blocklyTransparentBackground {","opacity: 0;","}",".blocklyMainWorkspaceScrollbar {","z-index: 20;","}",".blocklyFlyoutScrollbar {","z-index: 30;",
+"}",".blocklyScrollbarHorizontal, .blocklyScrollbarVertical {","position: absolute;","outline: none;","}",".blocklyScrollbarBackground {","opacity: 0;","}",".blocklyScrollbarHandle {","fill: #ccc;","}",".blocklyScrollbarBackground:hover+.blocklyScrollbarHandle,",".blocklyScrollbarHandle:hover {","fill: #bbb;","}",".blocklyZoom>image, .blocklyZoom>svg>image {","opacity: .4;","}",".blocklyZoom>image:hover, .blocklyZoom>svg>image:hover {","opacity: .6;","}",".blocklyZoom>image:active, .blocklyZoom>svg>image:active {",
+"opacity: .8;","}",".blocklyFlyout .blocklyScrollbarHandle {","fill: #bbb;","}",".blocklyFlyout .blocklyScrollbarBackground:hover+.blocklyScrollbarHandle,",".blocklyFlyout .blocklyScrollbarHandle:hover {","fill: #aaa;","}",".blocklyInvalidInput {","background: #faa;","}",".blocklyAngleCircle {","stroke: #444;","stroke-width: 1;","fill: #ddd;","fill-opacity: .8;","}",".blocklyAngleMarks {","stroke: #444;","stroke-width: 1;","}",".blocklyAngleGauge {","fill: #f88;","fill-opacity: .8;","}",".blocklyAngleLine {",
+"stroke: #f00;","stroke-width: 2;","stroke-linecap: round;","pointer-events: none;","}",".blocklyContextMenu {","border-radius: 4px;","}",".blocklyDropdownMenu {","padding: 0 !important;","}",".blocklyWidgetDiv .goog-option-selected .goog-menuitem-checkbox,",".blocklyWidgetDiv .goog-option-selected .goog-menuitem-icon {","background: url(<<<PATH>>>/sprites.png) no-repeat -48px -16px !important;","}",".blocklyToolboxDiv {","background-color: #ddd;","overflow-x: visible;","overflow-y: auto;","position: absolute;",
+"user-select: none;","-moz-user-select: none;","-ms-user-select: none;","-webkit-user-select: none;","z-index: 70;","-webkit-tap-highlight-color: transparent;","}",".blocklyTreeRoot {","padding: 4px 0;","}",".blocklyTreeRoot:focus {","outline: none;","}",".blocklyTreeRow {","height: 22px;","line-height: 22px;","margin-bottom: 3px;","padding-right: 8px;","white-space: nowrap;","}",".blocklyHorizontalTree {","float: left;","margin: 1px 5px 8px 0;","}",".blocklyHorizontalTreeRtl {","float: right;","margin: 1px 0 8px 5px;",
+"}",'.blocklyToolboxDiv[dir="RTL"] .blocklyTreeRow {',"margin-left: 8px;","}",".blocklyTreeRow:not(.blocklyTreeSelected):hover {","background-color: #e4e4e4;","}",".blocklyTreeSeparator {","border-bottom: solid #e5e5e5 1px;","height: 0;","margin: 5px 0;","}",".blocklyTreeSeparatorHorizontal {","border-right: solid #e5e5e5 1px;","width: 0;","padding: 5px 0;","margin: 0 5px;","}",".blocklyTreeIcon {","background-image: url(<<<PATH>>>/sprites.png);","height: 16px;","vertical-align: middle;","width: 16px;",
+"}",".blocklyTreeIconClosedLtr {","background-position: -32px -1px;","}",".blocklyTreeIconClosedRtl {","background-position: 0 -1px;","}",".blocklyTreeIconOpen {","background-position: -16px -1px;","}",".blocklyTreeSelected>.blocklyTreeIconClosedLtr {","background-position: -32px -17px;","}",".blocklyTreeSelected>.blocklyTreeIconClosedRtl {","background-position: 0 -17px;","}",".blocklyTreeSelected>.blocklyTreeIconOpen {","background-position: -16px -17px;","}",".blocklyTreeIconNone,",".blocklyTreeSelected>.blocklyTreeIconNone {",
+"background-position: -48px -1px;","}",".blocklyTreeLabel {","cursor: default;","font-family: sans-serif;","font-size: 16px;","padding: 0 3px;","vertical-align: middle;","}",".blocklyToolboxDelete .blocklyTreeLabel {",'cursor: url("<<<PATH>>>/handdelete.cur"), auto;',"}",".blocklyTreeSelected .blocklyTreeLabel {","color: #fff;","}",".blocklyColourTable {","border-collapse: collapse;","}",".blocklyColourTable>tr>td {","border: 1px solid #666;","padding: 0;","}",".blocklyColourTable>tr>td>div {","border: 1px solid #666;",
+"height: 13px;","width: 15px;","}",".blocklyColourTable>tr>td>div:hover {","border: 1px solid #fff;","}",".blocklyColourSelected, .blocklyColourSelected:hover {","border: 1px solid #000 !important;","}",".blocklyWidgetDiv .goog-menu {","background: #fff;","border-color: #ccc #666 #666 #ccc;","border-style: solid;","border-width: 1px;","cursor: default;","font: normal 13px Arial, sans-serif;","margin: 0;","outline: none;","padding: 4px 0;","position: absolute;","overflow-y: auto;","overflow-x: hidden;",
+"max-height: 100%;","z-index: 20000;","}",".blocklyWidgetDiv .goog-menuitem {","color: #000;","font: normal 13px Arial, sans-serif;","list-style: none;","margin: 0;","padding: 4px 7em 4px 28px;","white-space: nowrap;","}",".blocklyWidgetDiv .goog-menuitem.goog-menuitem-rtl {","padding-left: 7em;","padding-right: 28px;","}",".blocklyWidgetDiv .goog-menu-nocheckbox .goog-menuitem,",".blocklyWidgetDiv .goog-menu-noicon .goog-menuitem {","padding-left: 12px;","}",".blocklyWidgetDiv .goog-menu-noaccel .goog-menuitem {",
+"padding-right: 20px;","}",".blocklyWidgetDiv .goog-menuitem-content {","color: #000;","font: normal 13px Arial, sans-serif;","}",".blocklyWidgetDiv .goog-menuitem-disabled .goog-menuitem-accel,",".blocklyWidgetDiv .goog-menuitem-disabled .goog-menuitem-content {","color: #ccc !important;","}",".blocklyWidgetDiv .goog-menuitem-disabled .goog-menuitem-icon {","opacity: 0.3;","filter: alpha(opacity=30);","}",".blocklyWidgetDiv .goog-menuitem-highlight,",".blocklyWidgetDiv .goog-menuitem-hover {","background-color: #d6e9f8;",
+"border-color: #d6e9f8;","border-style: dotted;","border-width: 1px 0;","padding-bottom: 3px;","padding-top: 3px;","}",".blocklyWidgetDiv .goog-menuitem-checkbox,",".blocklyWidgetDiv .goog-menuitem-icon {","background-repeat: no-repeat;","height: 16px;","left: 6px;","position: absolute;","right: auto;","vertical-align: middle;","width: 16px;","}",".blocklyWidgetDiv .goog-menuitem-rtl .goog-menuitem-checkbox,",".blocklyWidgetDiv .goog-menuitem-rtl .goog-menuitem-icon {","left: auto;","right: 6px;",
+"}",".blocklyWidgetDiv .goog-option-selected .goog-menuitem-checkbox,",".blocklyWidgetDiv .goog-option-selected .goog-menuitem-icon {","background: url(//ssl.gstatic.com/editor/editortoolbar.png) no-repeat -512px 0;","}",".blocklyWidgetDiv .goog-menuitem-accel {","color: #999;","direction: ltr;","left: auto;","padding: 0 6px;","position: absolute;","right: 0;","text-align: right;","}",".blocklyWidgetDiv .goog-menuitem-rtl .goog-menuitem-accel {","left: 0;","right: auto;","text-align: left;","}",".blocklyWidgetDiv .goog-menuitem-mnemonic-hint {",
+"text-decoration: underline;","}",".blocklyWidgetDiv .goog-menuitem-mnemonic-separator {","color: #999;","font-size: 12px;","padding-left: 4px;","}",".blocklyWidgetDiv .goog-menuseparator {","border-top: 1px solid #ccc;","margin: 4px 0;","padding: 0;","}",""];Blockly.WidgetDiv={};Blockly.WidgetDiv.DIV=null;Blockly.WidgetDiv.owner_=null;Blockly.WidgetDiv.dispose_=null;Blockly.WidgetDiv.createDom=function(){Blockly.WidgetDiv.DIV||(Blockly.WidgetDiv.DIV=document.createElement("div"),Blockly.WidgetDiv.DIV.className="blocklyWidgetDiv",document.body.appendChild(Blockly.WidgetDiv.DIV))};
 Blockly.WidgetDiv.show=function(a,b,c){Blockly.WidgetDiv.hide();Blockly.WidgetDiv.owner_=a;Blockly.WidgetDiv.dispose_=c;a=goog.style.getViewportPageOffset(document);Blockly.WidgetDiv.DIV.style.top=a.y+"px";Blockly.WidgetDiv.DIV.style.direction=b?"rtl":"ltr";Blockly.WidgetDiv.DIV.style.display="block"};
 Blockly.WidgetDiv.hide=function(){Blockly.WidgetDiv.owner_&&(Blockly.WidgetDiv.owner_=null,Blockly.WidgetDiv.DIV.style.display="none",Blockly.WidgetDiv.DIV.style.left="",Blockly.WidgetDiv.DIV.style.top="",Blockly.WidgetDiv.dispose_&&Blockly.WidgetDiv.dispose_(),Blockly.WidgetDiv.dispose_=null,Blockly.WidgetDiv.DIV.innerHTML="")};Blockly.WidgetDiv.isVisible=function(){return!!Blockly.WidgetDiv.owner_};Blockly.WidgetDiv.hideIfOwner=function(a){Blockly.WidgetDiv.owner_==a&&Blockly.WidgetDiv.hide()};
 Blockly.WidgetDiv.position=function(a,b,c,d,e){b<d.y&&(b=d.y);e?a>c.width+d.x&&(a=c.width+d.x):a<d.x&&(a=d.x);Blockly.WidgetDiv.positionInternal_(a,b,c.height)};Blockly.WidgetDiv.positionInternal_=function(a,b,c){Blockly.WidgetDiv.DIV.style.left=a+"px";Blockly.WidgetDiv.DIV.style.top=b+"px";Blockly.WidgetDiv.DIV.style.height=c+"px"};
@@ -1690,20 +1701,20 @@ Blockly.init_(b);Blockly.mainWorkspace=b;Blockly.svgResize(b);return b};
 Blockly.createDom_=function(a,b){a.setAttribute("dir","LTR");goog.ui.Component.setDefaultRightToLeft(b.RTL);Blockly.Css.inject(b.hasCss,b.pathToMedia);a=Blockly.utils.createSvgElement("svg",{xmlns:"http://www.w3.org/2000/svg","xmlns:html":"http://www.w3.org/1999/xhtml","xmlns:xlink":"http://www.w3.org/1999/xlink",version:"1.1","class":"blocklySvg"},a);var c=Blockly.utils.createSvgElement("defs",{},a),d=String(Math.random()).substring(2),e=Blockly.utils.createSvgElement("filter",{id:"blocklyEmbossFilter"+
 d},c);Blockly.utils.createSvgElement("feGaussianBlur",{"in":"SourceAlpha",stdDeviation:1,result:"blur"},e);var f=Blockly.utils.createSvgElement("feSpecularLighting",{"in":"blur",surfaceScale:1,specularConstant:.5,specularExponent:10,"lighting-color":"white",result:"specOut"},e);Blockly.utils.createSvgElement("fePointLight",{x:-5E3,y:-1E4,z:2E4},f);Blockly.utils.createSvgElement("feComposite",{"in":"specOut",in2:"SourceAlpha",operator:"in",result:"specOut"},e);Blockly.utils.createSvgElement("feComposite",
 {"in":"SourceGraphic",in2:"specOut",operator:"arithmetic",k1:0,k2:1,k3:1,k4:0},e);b.embossFilterId=e.id;e=Blockly.utils.createSvgElement("pattern",{id:"blocklyDisabledPattern"+d,patternUnits:"userSpaceOnUse",width:10,height:10},c);Blockly.utils.createSvgElement("rect",{width:10,height:10,fill:"#aaa"},e);Blockly.utils.createSvgElement("path",{d:"M 0 0 L 10 10 M 10 0 L 0 10",stroke:"#cc0"},e);b.disabledPatternId=e.id;b.gridPattern=Blockly.Grid.createDom(d,b.gridOptions,c);return a};
-Blockly.createMainWorkspace_=function(a,b,c,d){b.parentWorkspace=null;var e=new Blockly.WorkspaceSvg(b,c,d);e.scale=b.zoomOptions.startScale;a.appendChild(e.createDom("blocklyMainBackground"));!b.hasCategories&&b.languageTree&&(c=e.addFlyout_("svg"),Blockly.utils.insertAfter(c,a));e.translate(0,0);Blockly.mainWorkspace=e;b.readOnly||b.hasScrollbars||e.addChangeListener(function(){if(!e.isDragging()){var a=e.getMetrics(),c=a.viewLeft+a.absoluteLeft,d=a.viewTop+a.absoluteTop;if(a.contentTop<d||a.contentTop+
-a.contentHeight>a.viewHeight+d||a.contentLeft<(b.RTL?a.viewLeft:c)||a.contentLeft+a.contentWidth>(b.RTL?a.viewWidth:a.viewWidth+c))for(var k=e.getTopBlocks(!1),l=0,n;n=k[l];l++){var m=n.getRelativeToSurfaceXY(),p=n.getHeightWidth(),q=d+25-p.height-m.y;0<q&&n.moveBy(0,q);q=d+a.viewHeight-25-m.y;0>q&&n.moveBy(0,q);q=25+c-m.x-(b.RTL?0:p.width);0<q&&n.moveBy(q,0);m=c+a.viewWidth-25-m.x+(b.RTL?p.width:0);0>m&&n.moveBy(m,0)}}});Blockly.svgResize(e);Blockly.WidgetDiv.createDom();Blockly.Tooltip.createDom();
-return e};
-Blockly.init_=function(a){var b=a.options,c=a.getParentSvg();Blockly.bindEventWithChecks_(c.parentNode,"contextmenu",null,function(a){Blockly.utils.isTargetInput(a)||a.preventDefault()});c=Blockly.bindEventWithChecks_(window,"resize",null,function(){Blockly.hideChaff(!0);Blockly.svgResize(a)});a.setResizeHandlerWrapper(c);Blockly.inject.bindDocumentEvents_();b.languageTree&&(a.toolbox_?a.toolbox_.init(a):a.flyout_&&(a.flyout_.init(a),a.flyout_.show(b.languageTree.childNodes),a.flyout_.scrollToStart(),a.scrollX=
-a.flyout_.width_,b.toolboxPosition==Blockly.TOOLBOX_AT_RIGHT&&(a.scrollX*=-1),a.translate(a.scrollX,0)));b.hasScrollbars&&(a.scrollbar=new Blockly.ScrollbarPair(a),a.scrollbar.resize());b.hasSounds&&Blockly.inject.loadSounds_(b.pathToMedia,a)};
+Blockly.createMainWorkspace_=function(a,b,c,d){b.parentWorkspace=null;var e=new Blockly.WorkspaceSvg(b,c,d);e.scale=b.zoomOptions.startScale;a.appendChild(e.createDom("blocklyMainBackground"));!b.hasCategories&&b.languageTree&&(c=e.addFlyout_("svg"),Blockly.utils.insertAfter(c,a));e.translate(0,0);Blockly.mainWorkspace=e;b.readOnly||b.hasScrollbars||e.addChangeListener(function(a){if(!e.isDragging()){var c=e.getMetrics(),d=c.viewLeft+c.absoluteLeft,f=c.viewTop+c.absoluteTop;if(c.contentTop<f||c.contentTop+
+c.contentHeight>c.viewHeight+f||c.contentLeft<(b.RTL?c.viewLeft:d)||c.contentLeft+c.contentWidth>(b.RTL?c.viewWidth:c.viewWidth+d)){var l=e.getTopBlocks(!1),n=null;a&&(n=Blockly.Events.getGroup(),Blockly.Events.setGroup(a.group));for(var m=!1,p=0,q;q=l[p];p++){var r=q.getRelativeToSurfaceXY(),t=q.getHeightWidth(),u=f+25-t.height-r.y;0<u&&(q.moveBy(0,u),m=!0);u=f+c.viewHeight-25-r.y;0>u&&(q.moveBy(0,u),m=!0);u=25+d-r.x-(b.RTL?0:t.width);0<u&&(q.moveBy(u,0),m=!0);r=d+c.viewWidth-25-r.x+(b.RTL?t.width:
+0);0>r&&(q.moveBy(r,0),m=!0)}a&&(!a.group&&m&&console.log("WARNING: Moved blocks in bounds but there was no event group. This may break undo."),Blockly.Events.setGroup(n))}}});Blockly.svgResize(e);Blockly.WidgetDiv.createDom();Blockly.Tooltip.createDom();return e};
+Blockly.init_=function(a){var b=a.options,c=a.getParentSvg();Blockly.bindEventWithChecks_(c.parentNode,"contextmenu",null,function(a){Blockly.utils.isTargetInput(a)||a.preventDefault()});c=Blockly.bindEventWithChecks_(window,"resize",null,function(){Blockly.hideChaff(!0);Blockly.svgResize(a)});a.setResizeHandlerWrapper(c);Blockly.inject.bindDocumentEvents_();b.languageTree&&(a.toolbox_?a.toolbox_.init(a):a.flyout_&&(a.flyout_.init(a),a.flyout_.show(b.languageTree.childNodes),a.flyout_.scrollToStart(),
+a.scrollX=a.flyout_.width_,b.toolboxPosition==Blockly.TOOLBOX_AT_RIGHT&&(a.scrollX*=-1),a.translate(a.scrollX,0)));b.hasScrollbars&&(a.scrollbar=new Blockly.ScrollbarPair(a),a.scrollbar.resize());b.hasSounds&&Blockly.inject.loadSounds_(b.pathToMedia,a)};
 Blockly.inject.bindDocumentEvents_=function(){Blockly.documentEventsBound_||(Blockly.bindEventWithChecks_(document,"keydown",null,Blockly.onKeyDown_),Blockly.bindEvent_(document,"touchend",null,Blockly.longStop_),Blockly.bindEvent_(document,"touchcancel",null,Blockly.longStop_),goog.userAgent.IPAD&&Blockly.bindEventWithChecks_(window,"orientationchange",document,function(){Blockly.svgResize(Blockly.getMainWorkspace())}));Blockly.documentEventsBound_=!0};
 Blockly.inject.loadSounds_=function(a,b){var c=b.getAudioManager();c.load([a+"click.mp3",a+"click.wav",a+"click.ogg"],"click");c.load([a+"disconnect.wav",a+"disconnect.mp3",a+"disconnect.ogg"],"disconnect");c.load([a+"delete.mp3",a+"delete.ogg",a+"delete.wav"],"delete");var d=[];a=function(){for(;d.length;)Blockly.unbindEvent_(d.pop());c.preload()};d.push(Blockly.bindEventWithChecks_(document,"mousemove",null,a,!0));d.push(Blockly.bindEventWithChecks_(document,"touchstart",null,a,!0))};
-Blockly.updateToolbox=function(a){console.warn("Deprecated call to Blockly.updateToolbox, use workspace.updateToolbox instead.");Blockly.getMainWorkspace().updateToolbox(a)};var CLOSURE_DEFINES={"goog.DEBUG":!1};Blockly.mainWorkspace=null;Blockly.selected=null;Blockly.draggingConnections_=[];Blockly.clipboardXml_=null;Blockly.clipboardSource_=null;Blockly.cache3dSupported_=null;Blockly.hueToRgb=function(a){return goog.color.hsvToHex(a,Blockly.HSV_SATURATION,255*Blockly.HSV_VALUE)};Blockly.svgSize=function(a){return{width:a.cachedWidth_,height:a.cachedHeight_}};Blockly.resizeSvgContents=function(a){a.resizeContents()};
+Blockly.updateToolbox=function(a){console.warn("Deprecated call to Blockly.updateToolbox, use workspace.updateToolbox instead.");Blockly.getMainWorkspace().updateToolbox(a)};var CLOSURE_DEFINES={"goog.DEBUG":!1};Blockly.mainWorkspace=null;Blockly.selected=null;Blockly.draggingConnections_=[];Blockly.clipboardXml_=null;Blockly.clipboardSource_=null;Blockly.clipboardTypeCounts_=null;Blockly.cache3dSupported_=null;Blockly.hueToRgb=function(a){return goog.color.hsvToHex(a,Blockly.HSV_SATURATION,255*Blockly.HSV_VALUE)};Blockly.svgSize=function(a){return{width:a.cachedWidth_,height:a.cachedHeight_}};Blockly.resizeSvgContents=function(a){a.resizeContents()};
 Blockly.svgResize=function(a){for(;a.options.parentWorkspace;)a=a.options.parentWorkspace;var b=a.getParentSvg(),c=b.parentNode;if(c){var d=c.offsetWidth;c=c.offsetHeight;b.cachedWidth_!=d&&(b.setAttribute("width",d+"px"),b.cachedWidth_=d);b.cachedHeight_!=c&&(b.setAttribute("height",c+"px"),b.cachedHeight_=c);a.resize()}};
 Blockly.onKeyDown_=function(a){var b=Blockly.mainWorkspace;if(!(b.options.readOnly||Blockly.utils.isTargetInput(a)||b.rendered&&!b.isVisible())){var c=!1;if(27==a.keyCode)Blockly.hideChaff();else if(8==a.keyCode||46==a.keyCode){a.preventDefault();if(b.isDragging())return;Blockly.selected&&Blockly.selected.isDeletable()&&(c=!0)}else if(a.altKey||a.ctrlKey||a.metaKey){if(b.isDragging())return;Blockly.selected&&Blockly.selected.isDeletable()&&Blockly.selected.isMovable()&&(67==a.keyCode?(Blockly.hideChaff(),
-Blockly.copy_(Blockly.selected)):88!=a.keyCode||Blockly.selected.workspace.isFlyout||(Blockly.copy_(Blockly.selected),c=!0));86==a.keyCode?Blockly.clipboardXml_&&(Blockly.Events.setGroup(!0),b=Blockly.clipboardSource_,b.isFlyout&&(b=b.targetWorkspace),b.paste(Blockly.clipboardXml_),Blockly.Events.setGroup(!1)):90==a.keyCode&&(Blockly.hideChaff(),b.undo(a.shiftKey))}c&&!Blockly.selected.workspace.isFlyout&&(Blockly.Events.setGroup(!0),Blockly.hideChaff(),Blockly.selected.dispose(!0,!0),Blockly.Events.setGroup(!1))}};
-Blockly.copy_=function(a){if(a.isComment)var b=a.toXmlWithXY();else{b=Blockly.Xml.blockToDom(a);Blockly.Xml.deleteNext(b);var c=a.getRelativeToSurfaceXY();b.setAttribute("x",a.RTL?-c.x:c.x);b.setAttribute("y",c.y)}Blockly.clipboardXml_=b;Blockly.clipboardSource_=a.workspace};Blockly.duplicate_=function(a){var b=Blockly.clipboardXml_,c=Blockly.clipboardSource_;Blockly.copy_(a);a.workspace.paste(Blockly.clipboardXml_);Blockly.clipboardXml_=b;Blockly.clipboardSource_=c};
-Blockly.onContextMenu_=function(a){Blockly.utils.isTargetInput(a)||a.preventDefault()};Blockly.hideChaff=function(a){Blockly.Tooltip.hide();Blockly.WidgetDiv.hide();a||(a=Blockly.getMainWorkspace(),a.toolbox_&&a.toolbox_.flyout_&&a.toolbox_.flyout_.autoClose&&a.toolbox_.clearSelection())};Blockly.addChangeListener=function(a){console.warn("Deprecated call to Blockly.addChangeListener, use workspace.addChangeListener instead.");return Blockly.getMainWorkspace().addChangeListener(a)};
-Blockly.getMainWorkspace=function(){return Blockly.mainWorkspace};Blockly.alert=function(a,b){window.alert(a);b&&b()};Blockly.confirm=function(a,b){b(window.confirm(a))};Blockly.prompt=function(a,b,c){c(window.prompt(a,b))};Blockly.jsonInitFactory_=function(a){return function(){this.jsonInit(a)}};
+Blockly.copy_(Blockly.selected)):88!=a.keyCode||Blockly.selected.workspace.isFlyout||(Blockly.copy_(Blockly.selected),c=!0));86==a.keyCode?Blockly.clipboardXml_&&(b=Blockly.clipboardSource_,b.isFlyout&&(b=b.targetWorkspace),Blockly.clipboardTypeCounts_&&b.isCapacityAvailable(Blockly.clipboardTypeCounts_)&&(Blockly.Events.setGroup(!0),b.paste(Blockly.clipboardXml_),Blockly.Events.setGroup(!1))):90==a.keyCode&&(Blockly.hideChaff(),b.undo(a.shiftKey))}c&&!Blockly.selected.workspace.isFlyout&&(Blockly.Events.setGroup(!0),
+Blockly.hideChaff(),Blockly.selected.dispose(!0,!0),Blockly.Events.setGroup(!1))}};Blockly.copy_=function(a){if(a.isComment)var b=a.toXmlWithXY();else{b=Blockly.Xml.blockToDom(a);Blockly.Xml.deleteNext(b);var c=a.getRelativeToSurfaceXY();b.setAttribute("x",a.RTL?-c.x:c.x);b.setAttribute("y",c.y)}Blockly.clipboardXml_=b;Blockly.clipboardSource_=a.workspace;Blockly.clipboardTypeCounts_=a.isComment?null:Blockly.utils.getBlockTypeCounts(a,!0)};
+Blockly.duplicate_=function(a){var b=Blockly.clipboardXml_,c=Blockly.clipboardSource_;Blockly.copy_(a);a.workspace.paste(Blockly.clipboardXml_);Blockly.clipboardXml_=b;Blockly.clipboardSource_=c};Blockly.onContextMenu_=function(a){Blockly.utils.isTargetInput(a)||a.preventDefault()};Blockly.hideChaff=function(a){Blockly.Tooltip.hide();Blockly.WidgetDiv.hide();a||(a=Blockly.getMainWorkspace(),a.toolbox_&&a.toolbox_.flyout_&&a.toolbox_.flyout_.autoClose&&a.toolbox_.clearSelection())};
+Blockly.addChangeListener=function(a){console.warn("Deprecated call to Blockly.addChangeListener, use workspace.addChangeListener instead.");return Blockly.getMainWorkspace().addChangeListener(a)};Blockly.getMainWorkspace=function(){return Blockly.mainWorkspace};Blockly.alert=function(a,b){window.alert(a);b&&b()};Blockly.confirm=function(a,b){b(window.confirm(a))};Blockly.prompt=function(a,b,c){c(window.prompt(a,b))};Blockly.jsonInitFactory_=function(a){return function(){this.jsonInit(a)}};
 Blockly.defineBlocksWithJsonArray=function(a){for(var b=0;b<a.length;b++){var c=a[b];if(c){var d=c.type;null==d||""===d?console.warn("Block definition #"+b+" in JSON array is missing a type attribute. Skipping."):(Blockly.Blocks[d]&&console.warn("Block definition #"+b+' in JSON array overwrites prior definition of "'+d+'".'),Blockly.Blocks[d]={init:Blockly.jsonInitFactory_(c)})}else console.warn("Block definition #"+b+" in JSON array is "+c+". Skipping.")}};
 Blockly.bindEventWithChecks_=function(a,b,c,d,e,f){var g=!1,h=function(a){var b=!e;a=Blockly.Touch.splitEventByTouches(a);for(var f=0,h;h=a[f];f++)if(!b||Blockly.Touch.shouldHandleEvent(h))Blockly.Touch.setClientFromTouch(h),c?d.call(c,h):d(h),g=!0},k=[];if(goog.global.PointerEvent&&b in Blockly.Touch.TOUCH_MAP)for(var l=0,n;n=Blockly.Touch.TOUCH_MAP[b][l];l++)a.addEventListener(n,h,!1),k.push([a,n,h]);else if(a.addEventListener(b,h,!1),k.push([a,b,h]),b in Blockly.Touch.TOUCH_MAP){var m=function(a){h(a);
 var b=!f;g&&b&&a.preventDefault()};for(l=0;n=Blockly.Touch.TOUCH_MAP[b][l];l++)a.addEventListener(n,m,!1),k.push([a,n,m])}return k};
diff --git a/blockly_compressed.js b/blockly_compressed.js
index 863e9169b..ee4ba186c 100644
--- a/blockly_compressed.js
+++ b/blockly_compressed.js
@@ -5,7 +5,7 @@ var $jscomp=$jscomp||{};$jscomp.scope={};var COMPILED=!0,goog=goog||{};goog.glob
 goog.exportPath_=function(a,b,c){a=a.split(".");c=c||goog.global;a[0]in c||"undefined"==typeof c.execScript||c.execScript("var "+a[0]);for(var d;a.length&&(d=a.shift());)!a.length&&goog.isDef(b)?c[d]=b:c=c[d]&&c[d]!==Object.prototype[d]?c[d]:c[d]={}};
 goog.define=function(a,b){var c=b;if(!COMPILED){var d=goog.global.CLOSURE_UNCOMPILED_DEFINES,e=goog.global.CLOSURE_DEFINES;d&&void 0===d.nodeType&&Object.prototype.hasOwnProperty.call(d,a)?c=d[a]:e&&void 0===e.nodeType&&Object.prototype.hasOwnProperty.call(e,a)&&(c=e[a])}goog.exportPath_(a,c)};goog.DEBUG=!1;goog.LOCALE="en";goog.TRUSTED_SITE=!0;goog.STRICT_MODE_COMPATIBLE=!1;goog.DISALLOW_TEST_ONLY_CODE=COMPILED&&!goog.DEBUG;goog.ENABLE_CHROME_APP_SAFE_SCRIPT_LOADING=!1;
 goog.provide=function(a){if(goog.isInModuleLoader_())throw Error("goog.provide cannot be used within a module.");if(!COMPILED&&goog.isProvided_(a))throw Error('Namespace "'+a+'" already declared.');goog.constructNamespace_(a)};goog.constructNamespace_=function(a,b){if(!COMPILED){delete goog.implicitNamespaces_[a];for(var c=a;(c=c.substring(0,c.lastIndexOf(".")))&&!goog.getObjectByName(c);)goog.implicitNamespaces_[c]=!0}goog.exportPath_(a,b)};
-goog.getScriptNonce=function(){null===goog.cspNonce_&&(goog.cspNonce_=goog.getScriptNonce_(goog.global.document)||"");return goog.cspNonce_};goog.NONCE_PATTERN_=/^[\w+/_-]+[=]{0,2}$/;goog.cspNonce_=null;goog.getScriptNonce_=function(a){return(a=a.querySelector&&a.querySelector("script[nonce]"))&&(a=a.nonce||a.getAttribute("nonce"))&&goog.NONCE_PATTERN_.test(a)?a:null};goog.VALID_MODULE_RE_=/^[a-zA-Z_$][a-zA-Z0-9._$]*$/;
+goog.getScriptNonce=function(a){if(a&&a!=goog.global)return goog.getScriptNonce_(a.document);null===goog.cspNonce_&&(goog.cspNonce_=goog.getScriptNonce_(goog.global.document));return goog.cspNonce_};goog.NONCE_PATTERN_=/^[\w+/_-]+[=]{0,2}$/;goog.cspNonce_=null;goog.getScriptNonce_=function(a){return(a=a.querySelector&&a.querySelector("script[nonce]"))&&(a=a.nonce||a.getAttribute("nonce"))&&goog.NONCE_PATTERN_.test(a)?a:""};goog.VALID_MODULE_RE_=/^[a-zA-Z_$][a-zA-Z0-9._$]*$/;
 goog.module=function(a){if(!goog.isString(a)||!a||-1==a.search(goog.VALID_MODULE_RE_))throw Error("Invalid module identifier");if(!goog.isInGoogModuleLoader_())throw Error("Module "+a+" has been loaded incorrectly. Note, modules cannot be loaded as normal scripts. They require some kind of pre-processing step. You're likely trying to load a module via a script tag or as a part of a concatenated bundle without rewriting the module. For more info see: https://github.com/google/closure-library/wiki/goog.module:-an-ES6-module-like-alternative-to-goog.provide.");
 if(goog.moduleLoaderState_.moduleName)throw Error("goog.module may only be called once per module.");goog.moduleLoaderState_.moduleName=a;if(!COMPILED){if(goog.isProvided_(a))throw Error('Namespace "'+a+'" already declared.');delete goog.implicitNamespaces_[a]}};goog.module.get=function(a){return goog.module.getInternal_(a)};
 goog.module.getInternal_=function(a){if(!COMPILED){if(a in goog.loadedModules_)return goog.loadedModules_[a].exports;if(!goog.implicitNamespaces_[a])return a=goog.getObjectByName(a),null!=a?a:null}return null};goog.ModuleType={ES6:"es6",GOOG:"goog"};goog.moduleLoaderState_=null;goog.isInModuleLoader_=function(){return goog.isInGoogModuleLoader_()||goog.isInEs6ModuleLoader_()};goog.isInGoogModuleLoader_=function(){return!!goog.moduleLoaderState_&&goog.moduleLoaderState_.type==goog.ModuleType.GOOG};
@@ -129,8 +129,8 @@ goog.color.prependZeroIfNecessaryHelper=function(a){return 1==a.length?"0"+a:a};
 goog.color.hsvToRgb=function(a,b,c){var d=0,e=0,f=0;if(0==b)f=e=d=c;else{var g=Math.floor(a/60),h=a/60-g;a=c*(1-b);var k=c*(1-b*h);b=c*(1-b*(1-h));switch(g){case 1:d=k;e=c;f=a;break;case 2:d=a;e=c;f=b;break;case 3:d=a;e=k;f=c;break;case 4:d=b;e=a;f=c;break;case 5:d=c;e=a;f=k;break;case 6:case 0:d=c,e=b,f=a}}return[Math.floor(d),Math.floor(e),Math.floor(f)]};
 goog.color.rgbToHsv=function(a,b,c){var d=Math.max(Math.max(a,b),c),e=Math.min(Math.min(a,b),c);if(e==d)e=a=0;else{var f=d-e;e=f/d;a=60*(a==d?(b-c)/f:b==d?2+(c-a)/f:4+(a-b)/f);0>a&&(a+=360);360<a&&(a-=360)}return[a,e,d]};goog.color.rgbArrayToHsv=function(a){return goog.color.rgbToHsv(a[0],a[1],a[2])};goog.color.hsvArrayToRgb=function(a){return goog.color.hsvToRgb(a[0],a[1],a[2])};goog.color.hexToHsl=function(a){a=goog.color.hexToRgb(a);return goog.color.rgbToHsl(a[0],a[1],a[2])};
 goog.color.hslToHex=function(a,b,c){return goog.color.rgbArrayToHex(goog.color.hslToRgb(a,b,c))};goog.color.hslArrayToHex=function(a){return goog.color.rgbArrayToHex(goog.color.hslToRgb(a[0],a[1],a[2]))};goog.color.hexToHsv=function(a){return goog.color.rgbArrayToHsv(goog.color.hexToRgb(a))};goog.color.hsvToHex=function(a,b,c){return goog.color.rgbArrayToHex(goog.color.hsvToRgb(a,b,c))};goog.color.hsvArrayToHex=function(a){return goog.color.hsvToHex(a[0],a[1],a[2])};
-goog.color.hslDistance=function(a,b){var c=.5>=a[2]?a[1]*a[2]:a[1]*(1-a[2]);var d=.5>=b[2]?b[1]*b[2]:b[1]*(1-b[2]);return(a[2]-b[2])*(a[2]-b[2])+c*c+d*d-2*c*d*Math.cos(2*(a[0]/360-b[0]/360)*Math.PI)};goog.color.blend=function(a,b,c){c=goog.math.clamp(c,0,1);return[Math.round(c*a[0]+(1-c)*b[0]),Math.round(c*a[1]+(1-c)*b[1]),Math.round(c*a[2]+(1-c)*b[2])]};goog.color.darken=function(a,b){return goog.color.blend([0,0,0],a,b)};goog.color.lighten=function(a,b){return goog.color.blend([255,255,255],a,b)};
-goog.color.highContrast=function(a,b){for(var c=[],d=0;d<b.length;d++)c.push({color:b[d],diff:goog.color.yiqBrightnessDiff_(b[d],a)+goog.color.colorDiff_(b[d],a)});c.sort(function(a,b){return b.diff-a.diff});return c[0].color};goog.color.yiqBrightness_=function(a){return Math.round((299*a[0]+587*a[1]+114*a[2])/1E3)};goog.color.yiqBrightnessDiff_=function(a,b){return Math.abs(goog.color.yiqBrightness_(a)-goog.color.yiqBrightness_(b))};
+goog.color.hslDistance=function(a,b){var c=.5>=a[2]?a[1]*a[2]:a[1]*(1-a[2]);var d=.5>=b[2]?b[1]*b[2]:b[1]*(1-b[2]);return(a[2]-b[2])*(a[2]-b[2])+c*c+d*d-2*c*d*Math.cos(2*(a[0]/360-b[0]/360)*Math.PI)};goog.color.blend=function(a,b,c){c=goog.math.clamp(c,0,1);return[Math.round(b[0]+c*(a[0]-b[0])),Math.round(b[1]+c*(a[1]-b[1])),Math.round(b[2]+c*(a[2]-b[2]))]};goog.color.darken=function(a,b){return goog.color.blend([0,0,0],a,b)};
+goog.color.lighten=function(a,b){return goog.color.blend([255,255,255],a,b)};goog.color.highContrast=function(a,b){for(var c=[],d=0;d<b.length;d++)c.push({color:b[d],diff:goog.color.yiqBrightnessDiff_(b[d],a)+goog.color.colorDiff_(b[d],a)});c.sort(function(a,b){return b.diff-a.diff});return c[0].color};goog.color.yiqBrightness_=function(a){return Math.round((299*a[0]+587*a[1]+114*a[2])/1E3)};goog.color.yiqBrightnessDiff_=function(a,b){return Math.abs(goog.color.yiqBrightness_(a)-goog.color.yiqBrightness_(b))};
 goog.color.colorDiff_=function(a,b){return Math.abs(a[0]-b[0])+Math.abs(a[1]-b[1])+Math.abs(a[2]-b[2])};goog.string={};goog.string.DETECT_DOUBLE_ESCAPING=!1;goog.string.FORCE_NON_DOM_HTML_UNESCAPING=!1;goog.string.Unicode={NBSP:"\u00a0"};goog.string.startsWith=function(a,b){return 0==a.lastIndexOf(b,0)};goog.string.endsWith=function(a,b){var c=a.length-b.length;return 0<=c&&a.indexOf(b,c)==c};goog.string.caseInsensitiveStartsWith=function(a,b){return 0==goog.string.caseInsensitiveCompare(b,a.substr(0,b.length))};
 goog.string.caseInsensitiveEndsWith=function(a,b){return 0==goog.string.caseInsensitiveCompare(b,a.substr(a.length-b.length,b.length))};goog.string.caseInsensitiveEquals=function(a,b){return a.toLowerCase()==b.toLowerCase()};goog.string.subs=function(a,b){for(var c=a.split("%s"),d="",e=Array.prototype.slice.call(arguments,1);e.length&&1<c.length;)d+=c.shift()+e.shift();return d+c.join("%s")};goog.string.collapseWhitespace=function(a){return a.replace(/[\s\xa0]+/g," ").replace(/^\s+|\s+$/g,"")};
 goog.string.isEmptyOrWhitespace=function(a){return/^[\s\xa0]*$/.test(a)};goog.string.isEmptyString=function(a){return 0==a.length};goog.string.isEmpty=goog.string.isEmptyOrWhitespace;goog.string.isEmptyOrWhitespaceSafe=function(a){return goog.string.isEmptyOrWhitespace(goog.string.makeSafe(a))};goog.string.isEmptySafe=goog.string.isEmptyOrWhitespaceSafe;goog.string.isBreakingWhitespace=function(a){return!/[^\t\n\r ]/.test(a)};goog.string.isAlpha=function(a){return!/[^a-zA-Z]/.test(a)};
@@ -233,11 +233,11 @@ goog.events.EventType.MSPOINTERENTER,goog.events.EventType.MOUSEENTER),POINTERLE
 goog.events.PointerTouchFallbackEventType={POINTERDOWN:goog.events.getPointerFallbackEventName_(goog.events.EventType.POINTERDOWN,goog.events.EventType.MSPOINTERDOWN,goog.events.EventType.TOUCHSTART),POINTERUP:goog.events.getPointerFallbackEventName_(goog.events.EventType.POINTERUP,goog.events.EventType.MSPOINTERUP,goog.events.EventType.TOUCHEND),POINTERCANCEL:goog.events.getPointerFallbackEventName_(goog.events.EventType.POINTERCANCEL,goog.events.EventType.MSPOINTERCANCEL,goog.events.EventType.TOUCHCANCEL),
 POINTERMOVE:goog.events.getPointerFallbackEventName_(goog.events.EventType.POINTERMOVE,goog.events.EventType.MSPOINTERMOVE,goog.events.EventType.TOUCHMOVE)};
 goog.events.PointerAsMouseEventType={MOUSEDOWN:goog.events.PointerFallbackEventType.POINTERDOWN,MOUSEUP:goog.events.PointerFallbackEventType.POINTERUP,MOUSECANCEL:goog.events.PointerFallbackEventType.POINTERCANCEL,MOUSEMOVE:goog.events.PointerFallbackEventType.POINTERMOVE,MOUSEOVER:goog.events.PointerFallbackEventType.POINTEROVER,MOUSEOUT:goog.events.PointerFallbackEventType.POINTEROUT,MOUSEENTER:goog.events.PointerFallbackEventType.POINTERENTER,MOUSELEAVE:goog.events.PointerFallbackEventType.POINTERLEAVE};
-goog.events.PointerAsTouchEventType={TOUCHCANCEL:goog.events.PointerTouchFallbackEventType.POINTERCANCEL,TOUCHEND:goog.events.PointerTouchFallbackEventType.POINTERUP,TOUCHMOVE:goog.events.PointerTouchFallbackEventType.POINTERMOVE,TOUCHSTART:goog.events.PointerTouchFallbackEventType.POINTERDOWN};goog.events.BrowserEvent=function(a,b){goog.events.Event.call(this,a?a.type:"");this.relatedTarget=this.currentTarget=this.target=null;this.button=this.screenY=this.screenX=this.clientY=this.clientX=this.offsetY=this.offsetX=0;this.key="";this.charCode=this.keyCode=0;this.metaKey=this.shiftKey=this.altKey=this.ctrlKey=!1;this.state=null;this.platformModifierKey=!1;this.pointerId=0;this.pointerType="";this.event_=null;a&&this.init(a,b)};goog.inherits(goog.events.BrowserEvent,goog.events.Event);
-goog.events.BrowserEvent.MouseButton={LEFT:0,MIDDLE:1,RIGHT:2};goog.events.BrowserEvent.PointerType={MOUSE:"mouse",PEN:"pen",TOUCH:"touch"};goog.events.BrowserEvent.IEButtonMap=goog.debug.freeze([1,4,2]);goog.events.BrowserEvent.IE_BUTTON_MAP=goog.events.BrowserEvent.IEButtonMap;goog.events.BrowserEvent.IE_POINTER_TYPE_MAP=goog.debug.freeze({2:goog.events.BrowserEvent.PointerType.TOUCH,3:goog.events.BrowserEvent.PointerType.PEN,4:goog.events.BrowserEvent.PointerType.MOUSE});
-goog.events.BrowserEvent.prototype.init=function(a,b){var c=this.type=a.type,d=a.changedTouches?a.changedTouches[0]:null;this.target=a.target||a.srcElement;this.currentTarget=b;var e=a.relatedTarget;e?goog.userAgent.GECKO&&(goog.reflect.canAccessProperty(e,"nodeName")||(e=null)):c==goog.events.EventType.MOUSEOVER?e=a.fromElement:c==goog.events.EventType.MOUSEOUT&&(e=a.toElement);this.relatedTarget=e;goog.isNull(d)?(this.offsetX=goog.userAgent.WEBKIT||void 0!==a.offsetX?a.offsetX:a.layerX,this.offsetY=
-goog.userAgent.WEBKIT||void 0!==a.offsetY?a.offsetY:a.layerY,this.clientX=void 0!==a.clientX?a.clientX:a.pageX,this.clientY=void 0!==a.clientY?a.clientY:a.pageY,this.screenX=a.screenX||0,this.screenY=a.screenY||0):(this.clientX=void 0!==d.clientX?d.clientX:d.pageX,this.clientY=void 0!==d.clientY?d.clientY:d.pageY,this.screenX=d.screenX||0,this.screenY=d.screenY||0);this.button=a.button;this.keyCode=a.keyCode||0;this.key=a.key||"";this.charCode=a.charCode||("keypress"==c?a.keyCode:0);this.ctrlKey=
-a.ctrlKey;this.altKey=a.altKey;this.shiftKey=a.shiftKey;this.metaKey=a.metaKey;this.platformModifierKey=goog.userAgent.MAC?a.metaKey:a.ctrlKey;this.pointerId=a.pointerId||0;this.pointerType=goog.events.BrowserEvent.getPointerType_(a);this.state=a.state;this.event_=a;a.defaultPrevented&&this.preventDefault()};
+goog.events.PointerAsTouchEventType={TOUCHCANCEL:goog.events.PointerTouchFallbackEventType.POINTERCANCEL,TOUCHEND:goog.events.PointerTouchFallbackEventType.POINTERUP,TOUCHMOVE:goog.events.PointerTouchFallbackEventType.POINTERMOVE,TOUCHSTART:goog.events.PointerTouchFallbackEventType.POINTERDOWN};goog.events.USE_LAYER_XY_AS_OFFSET_XY=!1;goog.events.BrowserEvent=function(a,b){goog.events.Event.call(this,a?a.type:"");this.relatedTarget=this.currentTarget=this.target=null;this.button=this.screenY=this.screenX=this.clientY=this.clientX=this.offsetY=this.offsetX=0;this.key="";this.charCode=this.keyCode=0;this.metaKey=this.shiftKey=this.altKey=this.ctrlKey=!1;this.state=null;this.platformModifierKey=!1;this.pointerId=0;this.pointerType="";this.event_=null;a&&this.init(a,b)};
+goog.inherits(goog.events.BrowserEvent,goog.events.Event);goog.events.BrowserEvent.MouseButton={LEFT:0,MIDDLE:1,RIGHT:2};goog.events.BrowserEvent.PointerType={MOUSE:"mouse",PEN:"pen",TOUCH:"touch"};goog.events.BrowserEvent.IEButtonMap=goog.debug.freeze([1,4,2]);goog.events.BrowserEvent.IE_BUTTON_MAP=goog.events.BrowserEvent.IEButtonMap;goog.events.BrowserEvent.IE_POINTER_TYPE_MAP=goog.debug.freeze({2:goog.events.BrowserEvent.PointerType.TOUCH,3:goog.events.BrowserEvent.PointerType.PEN,4:goog.events.BrowserEvent.PointerType.MOUSE});
+goog.events.BrowserEvent.prototype.init=function(a,b){var c=this.type=a.type,d=a.changedTouches&&a.changedTouches.length?a.changedTouches[0]:null;this.target=a.target||a.srcElement;this.currentTarget=b;var e=a.relatedTarget;e?goog.userAgent.GECKO&&(goog.reflect.canAccessProperty(e,"nodeName")||(e=null)):c==goog.events.EventType.MOUSEOVER?e=a.fromElement:c==goog.events.EventType.MOUSEOUT&&(e=a.toElement);this.relatedTarget=e;d?(this.clientX=void 0!==d.clientX?d.clientX:d.pageX,this.clientY=void 0!==
+d.clientY?d.clientY:d.pageY,this.screenX=d.screenX||0,this.screenY=d.screenY||0):(goog.events.USE_LAYER_XY_AS_OFFSET_XY?(this.offsetX=void 0!==a.layerX?a.layerX:a.offsetX,this.offsetY=void 0!==a.layerY?a.layerY:a.offsetY):(this.offsetX=goog.userAgent.WEBKIT||void 0!==a.offsetX?a.offsetX:a.layerX,this.offsetY=goog.userAgent.WEBKIT||void 0!==a.offsetY?a.offsetY:a.layerY),this.clientX=void 0!==a.clientX?a.clientX:a.pageX,this.clientY=void 0!==a.clientY?a.clientY:a.pageY,this.screenX=a.screenX||0,this.screenY=
+a.screenY||0);this.button=a.button;this.keyCode=a.keyCode||0;this.key=a.key||"";this.charCode=a.charCode||("keypress"==c?a.keyCode:0);this.ctrlKey=a.ctrlKey;this.altKey=a.altKey;this.shiftKey=a.shiftKey;this.metaKey=a.metaKey;this.platformModifierKey=goog.userAgent.MAC?a.metaKey:a.ctrlKey;this.pointerId=a.pointerId||0;this.pointerType=goog.events.BrowserEvent.getPointerType_(a);this.state=a.state;this.event_=a;a.defaultPrevented&&this.preventDefault()};
 goog.events.BrowserEvent.prototype.isButton=function(a){return goog.events.BrowserFeature.HAS_W3C_BUTTON?this.event_.button==a:"click"==this.type?a==goog.events.BrowserEvent.MouseButton.LEFT:!!(this.event_.button&goog.events.BrowserEvent.IE_BUTTON_MAP[a])};goog.events.BrowserEvent.prototype.isMouseActionButton=function(){return this.isButton(goog.events.BrowserEvent.MouseButton.LEFT)&&!(goog.userAgent.WEBKIT&&goog.userAgent.MAC&&this.ctrlKey)};
 goog.events.BrowserEvent.prototype.stopPropagation=function(){goog.events.BrowserEvent.superClass_.stopPropagation.call(this);this.event_.stopPropagation?this.event_.stopPropagation():this.event_.cancelBubble=!0};
 goog.events.BrowserEvent.prototype.preventDefault=function(){goog.events.BrowserEvent.superClass_.preventDefault.call(this);var a=this.event_;if(a.preventDefault)a.preventDefault();else if(a.returnValue=!1,goog.events.BrowserFeature.SET_KEY_CODE_TO_PREVENT_DEFAULT)try{if(a.ctrlKey||112<=a.keyCode&&123>=a.keyCode)a.keyCode=-1}catch(b){}};goog.events.BrowserEvent.prototype.getBrowserEvent=function(){return this.event_};
@@ -290,13 +290,14 @@ goog.functions.create=function(a,b){var c=function(){};c.prototype=a.prototype;c
 goog.functions.debounce=function(a,b,c){var d=0;return function(e){goog.global.clearTimeout(d);var f=arguments;d=goog.global.setTimeout(function(){a.apply(c,f)},b)}};goog.functions.throttle=function(a,b,c){var d=0,e=!1,f=[],g=function(){d=0;e&&(e=!1,h())},h=function(){d=goog.global.setTimeout(g,b);a.apply(c,f)};return function(a){f=arguments;d?e=!0:h()}};goog.functions.rateLimit=function(a,b,c){var d=0,e=function(){d=0};return function(f){d||(d=goog.global.setTimeout(e,b),a.apply(c,arguments))}};goog.dom.tags={};goog.dom.tags.VOID_TAGS_={area:!0,base:!0,br:!0,col:!0,command:!0,embed:!0,hr:!0,img:!0,input:!0,keygen:!0,link:!0,meta:!0,param:!0,source:!0,track:!0,wbr:!0};goog.dom.tags.isVoidTag=function(a){return!0===goog.dom.tags.VOID_TAGS_[a]};goog.string.TypedString=function(){};goog.string.Const=function(a,b){this.stringConstValueWithSecurityContract__googStringSecurityPrivate_=a===goog.string.Const.GOOG_STRING_CONSTRUCTOR_TOKEN_PRIVATE_&&b||"";this.STRING_CONST_TYPE_MARKER__GOOG_STRING_SECURITY_PRIVATE_=goog.string.Const.TYPE_MARKER_};goog.string.Const.prototype.implementsGoogStringTypedString=!0;goog.string.Const.prototype.getTypedStringValue=function(){return this.stringConstValueWithSecurityContract__googStringSecurityPrivate_};
 goog.string.Const.prototype.toString=function(){return"Const{"+this.stringConstValueWithSecurityContract__googStringSecurityPrivate_+"}"};goog.string.Const.unwrap=function(a){if(a instanceof goog.string.Const&&a.constructor===goog.string.Const&&a.STRING_CONST_TYPE_MARKER__GOOG_STRING_SECURITY_PRIVATE_===goog.string.Const.TYPE_MARKER_)return a.stringConstValueWithSecurityContract__googStringSecurityPrivate_;goog.asserts.fail("expected object of type Const, got '"+a+"'");return"type_error:Const"};
 goog.string.Const.from=function(a){return new goog.string.Const(goog.string.Const.GOOG_STRING_CONSTRUCTOR_TOKEN_PRIVATE_,a)};goog.string.Const.TYPE_MARKER_={};goog.string.Const.GOOG_STRING_CONSTRUCTOR_TOKEN_PRIVATE_={};goog.string.Const.EMPTY=goog.string.Const.from("");goog.html={};goog.html.SafeScript=function(){this.privateDoNotAccessOrElseSafeScriptWrappedValue_="";this.SAFE_SCRIPT_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_=goog.html.SafeScript.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_};goog.html.SafeScript.prototype.implementsGoogStringTypedString=!0;goog.html.SafeScript.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_={};goog.html.SafeScript.fromConstant=function(a){a=goog.string.Const.unwrap(a);return 0===a.length?goog.html.SafeScript.EMPTY:goog.html.SafeScript.createSafeScriptSecurityPrivateDoNotAccessOrElse(a)};
-goog.html.SafeScript.fromConstantAndArgs=function(a,b){for(var c=[],d=1;d<arguments.length;d++)c.push(goog.html.SafeScript.stringify_(arguments[d]));return goog.html.SafeScript.createSafeScriptSecurityPrivateDoNotAccessOrElse("("+goog.string.Const.unwrap(a)+")("+c.join(", ")+");")};goog.html.SafeScript.prototype.getTypedStringValue=function(){return this.privateDoNotAccessOrElseSafeScriptWrappedValue_};
+goog.html.SafeScript.fromConstantAndArgs=function(a,b){for(var c=[],d=1;d<arguments.length;d++)c.push(goog.html.SafeScript.stringify_(arguments[d]));return goog.html.SafeScript.createSafeScriptSecurityPrivateDoNotAccessOrElse("("+goog.string.Const.unwrap(a)+")("+c.join(", ")+");")};goog.html.SafeScript.fromJson=function(a){return goog.html.SafeScript.createSafeScriptSecurityPrivateDoNotAccessOrElse(goog.html.SafeScript.stringify_(a))};goog.html.SafeScript.prototype.getTypedStringValue=function(){return this.privateDoNotAccessOrElseSafeScriptWrappedValue_};
 goog.DEBUG&&(goog.html.SafeScript.prototype.toString=function(){return"SafeScript{"+this.privateDoNotAccessOrElseSafeScriptWrappedValue_+"}"});
 goog.html.SafeScript.unwrap=function(a){if(a instanceof goog.html.SafeScript&&a.constructor===goog.html.SafeScript&&a.SAFE_SCRIPT_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_===goog.html.SafeScript.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_)return a.privateDoNotAccessOrElseSafeScriptWrappedValue_;goog.asserts.fail("expected object of type SafeScript, got '"+a+"' of type "+goog.typeOf(a));return"type_error:SafeScript"};goog.html.SafeScript.stringify_=function(a){return JSON.stringify(a).replace(/</g,"\\x3c")};
 goog.html.SafeScript.createSafeScriptSecurityPrivateDoNotAccessOrElse=function(a){return(new goog.html.SafeScript).initSecurityPrivateDoNotAccessOrElse_(a)};goog.html.SafeScript.prototype.initSecurityPrivateDoNotAccessOrElse_=function(a){this.privateDoNotAccessOrElseSafeScriptWrappedValue_=a;return this};goog.html.SafeScript.EMPTY=goog.html.SafeScript.createSafeScriptSecurityPrivateDoNotAccessOrElse("");goog.fs={};goog.fs.url={};goog.fs.url.createObjectUrl=function(a){return goog.fs.url.getUrlObject_().createObjectURL(a)};goog.fs.url.revokeObjectUrl=function(a){goog.fs.url.getUrlObject_().revokeObjectURL(a)};goog.fs.url.getUrlObject_=function(){var a=goog.fs.url.findUrlObject_();if(null!=a)return a;throw Error("This browser doesn't seem to support blob URLs");};
 goog.fs.url.findUrlObject_=function(){return goog.isDef(goog.global.URL)&&goog.isDef(goog.global.URL.createObjectURL)?goog.global.URL:goog.isDef(goog.global.webkitURL)&&goog.isDef(goog.global.webkitURL.createObjectURL)?goog.global.webkitURL:goog.isDef(goog.global.createObjectURL)?goog.global:null};goog.fs.url.browserSupportsObjectUrls=function(){return null!=goog.fs.url.findUrlObject_()};goog.i18n={};goog.i18n.bidi={};goog.i18n.bidi.FORCE_RTL=!1;
 goog.i18n.bidi.IS_RTL=goog.i18n.bidi.FORCE_RTL||("ar"==goog.LOCALE.substring(0,2).toLowerCase()||"fa"==goog.LOCALE.substring(0,2).toLowerCase()||"he"==goog.LOCALE.substring(0,2).toLowerCase()||"iw"==goog.LOCALE.substring(0,2).toLowerCase()||"ps"==goog.LOCALE.substring(0,2).toLowerCase()||"sd"==goog.LOCALE.substring(0,2).toLowerCase()||"ug"==goog.LOCALE.substring(0,2).toLowerCase()||"ur"==goog.LOCALE.substring(0,2).toLowerCase()||"yi"==goog.LOCALE.substring(0,2).toLowerCase())&&(2==goog.LOCALE.length||
-"-"==goog.LOCALE.substring(2,3)||"_"==goog.LOCALE.substring(2,3))||3<=goog.LOCALE.length&&"ckb"==goog.LOCALE.substring(0,3).toLowerCase()&&(3==goog.LOCALE.length||"-"==goog.LOCALE.substring(3,4)||"_"==goog.LOCALE.substring(3,4))||7<=goog.LOCALE.length&&"ff"==goog.LOCALE.substring(0,2).toLowerCase()&&("-"==goog.LOCALE.substring(2,3)||"_"==goog.LOCALE.substring(2,3))&&("adlm"==goog.LOCALE.substring(3,7).toLowerCase()||"arab"==goog.LOCALE.substring(3,7).toLowerCase());
+"-"==goog.LOCALE.substring(2,3)||"_"==goog.LOCALE.substring(2,3))||3<=goog.LOCALE.length&&"ckb"==goog.LOCALE.substring(0,3).toLowerCase()&&(3==goog.LOCALE.length||"-"==goog.LOCALE.substring(3,4)||"_"==goog.LOCALE.substring(3,4))||7<=goog.LOCALE.length&&("-"==goog.LOCALE.substring(2,3)||"_"==goog.LOCALE.substring(2,3))&&("adlm"==goog.LOCALE.substring(3,7).toLowerCase()||"arab"==goog.LOCALE.substring(3,7).toLowerCase()||"hebr"==goog.LOCALE.substring(3,7).toLowerCase()||"nkoo"==goog.LOCALE.substring(3,
+7).toLowerCase()||"rohg"==goog.LOCALE.substring(3,7).toLowerCase()||"thaa"==goog.LOCALE.substring(3,7).toLowerCase())||8<=goog.LOCALE.length&&("-"==goog.LOCALE.substring(3,4)||"_"==goog.LOCALE.substring(3,4))&&("adlm"==goog.LOCALE.substring(4,8).toLowerCase()||"arab"==goog.LOCALE.substring(4,8).toLowerCase()||"hebr"==goog.LOCALE.substring(4,8).toLowerCase()||"nkoo"==goog.LOCALE.substring(4,8).toLowerCase()||"rohg"==goog.LOCALE.substring(4,8).toLowerCase()||"thaa"==goog.LOCALE.substring(4,8).toLowerCase());
 goog.i18n.bidi.Format={LRE:"\u202a",RLE:"\u202b",PDF:"\u202c",LRM:"\u200e",RLM:"\u200f"};goog.i18n.bidi.Dir={LTR:1,RTL:-1,NEUTRAL:0};goog.i18n.bidi.RIGHT="right";goog.i18n.bidi.LEFT="left";goog.i18n.bidi.I18N_RIGHT=goog.i18n.bidi.IS_RTL?goog.i18n.bidi.LEFT:goog.i18n.bidi.RIGHT;goog.i18n.bidi.I18N_LEFT=goog.i18n.bidi.IS_RTL?goog.i18n.bidi.RIGHT:goog.i18n.bidi.LEFT;
 goog.i18n.bidi.toDir=function(a,b){return"number"==typeof a?0<a?goog.i18n.bidi.Dir.LTR:0>a?goog.i18n.bidi.Dir.RTL:b?null:goog.i18n.bidi.Dir.NEUTRAL:null==a?null:a?goog.i18n.bidi.Dir.RTL:goog.i18n.bidi.Dir.LTR};goog.i18n.bidi.ltrChars_="A-Za-z\u00c0-\u00d6\u00d8-\u00f6\u00f8-\u02b8\u0300-\u0590\u0900-\u1fff\u200e\u2c00-\ud801\ud804-\ud839\ud83c-\udbff\uf900-\ufb1c\ufe00-\ufe6f\ufefd-\uffff";goog.i18n.bidi.rtlChars_="\u0591-\u06ef\u06fa-\u08ff\u200f\ud802-\ud803\ud83a-\ud83b\ufb1d-\ufdff\ufe70-\ufefc";
 goog.i18n.bidi.htmlSkipReg_=/<[^>]*>|&[^;]+;/g;goog.i18n.bidi.stripHtmlIfNeeded_=function(a,b){return b?a.replace(goog.i18n.bidi.htmlSkipReg_,""):a};goog.i18n.bidi.rtlCharReg_=new RegExp("["+goog.i18n.bidi.rtlChars_+"]");goog.i18n.bidi.ltrCharReg_=new RegExp("["+goog.i18n.bidi.ltrChars_+"]");goog.i18n.bidi.hasAnyRtl=function(a,b){return goog.i18n.bidi.rtlCharReg_.test(goog.i18n.bidi.stripHtmlIfNeeded_(a,b))};goog.i18n.bidi.hasRtlChar=goog.i18n.bidi.hasAnyRtl;
@@ -304,7 +305,7 @@ goog.i18n.bidi.hasAnyLtr=function(a,b){return goog.i18n.bidi.ltrCharReg_.test(go
 goog.i18n.bidi.ltrDirCheckRe_=new RegExp("^[^"+goog.i18n.bidi.rtlChars_+"]*["+goog.i18n.bidi.ltrChars_+"]");goog.i18n.bidi.rtlDirCheckRe_=new RegExp("^[^"+goog.i18n.bidi.ltrChars_+"]*["+goog.i18n.bidi.rtlChars_+"]");goog.i18n.bidi.startsWithRtl=function(a,b){return goog.i18n.bidi.rtlDirCheckRe_.test(goog.i18n.bidi.stripHtmlIfNeeded_(a,b))};goog.i18n.bidi.isRtlText=goog.i18n.bidi.startsWithRtl;
 goog.i18n.bidi.startsWithLtr=function(a,b){return goog.i18n.bidi.ltrDirCheckRe_.test(goog.i18n.bidi.stripHtmlIfNeeded_(a,b))};goog.i18n.bidi.isLtrText=goog.i18n.bidi.startsWithLtr;goog.i18n.bidi.isRequiredLtrRe_=/^http:\/\/.*/;goog.i18n.bidi.isNeutralText=function(a,b){a=goog.i18n.bidi.stripHtmlIfNeeded_(a,b);return goog.i18n.bidi.isRequiredLtrRe_.test(a)||!goog.i18n.bidi.hasAnyLtr(a)&&!goog.i18n.bidi.hasAnyRtl(a)};
 goog.i18n.bidi.ltrExitDirCheckRe_=new RegExp("["+goog.i18n.bidi.ltrChars_+"][^"+goog.i18n.bidi.rtlChars_+"]*$");goog.i18n.bidi.rtlExitDirCheckRe_=new RegExp("["+goog.i18n.bidi.rtlChars_+"][^"+goog.i18n.bidi.ltrChars_+"]*$");goog.i18n.bidi.endsWithLtr=function(a,b){return goog.i18n.bidi.ltrExitDirCheckRe_.test(goog.i18n.bidi.stripHtmlIfNeeded_(a,b))};goog.i18n.bidi.isLtrExitText=goog.i18n.bidi.endsWithLtr;
-goog.i18n.bidi.endsWithRtl=function(a,b){return goog.i18n.bidi.rtlExitDirCheckRe_.test(goog.i18n.bidi.stripHtmlIfNeeded_(a,b))};goog.i18n.bidi.isRtlExitText=goog.i18n.bidi.endsWithRtl;goog.i18n.bidi.rtlLocalesRe_=/^(ar|ckb|dv|he|iw|fa|nqo|ps|sd|ug|ur|yi|.*[-_](Adlm|Arab|Hebr|Thaa|Nkoo|Tfng))(?!.*[-_](Latn|Cyrl)($|-|_))($|-|_)/i;goog.i18n.bidi.isRtlLanguage=function(a){return goog.i18n.bidi.rtlLocalesRe_.test(a)};goog.i18n.bidi.bracketGuardTextRe_=/(\(.*?\)+)|(\[.*?\]+)|(\{.*?\}+)|(<.*?>+)/g;
+goog.i18n.bidi.endsWithRtl=function(a,b){return goog.i18n.bidi.rtlExitDirCheckRe_.test(goog.i18n.bidi.stripHtmlIfNeeded_(a,b))};goog.i18n.bidi.isRtlExitText=goog.i18n.bidi.endsWithRtl;goog.i18n.bidi.rtlLocalesRe_=/^(ar|ckb|dv|he|iw|fa|nqo|ps|sd|ug|ur|yi|.*[-_](Adlm|Arab|Hebr|Nkoo|Rohg|Thaa))(?!.*[-_](Latn|Cyrl)($|-|_))($|-|_)/i;goog.i18n.bidi.isRtlLanguage=function(a){return goog.i18n.bidi.rtlLocalesRe_.test(a)};goog.i18n.bidi.bracketGuardTextRe_=/(\(.*?\)+)|(\[.*?\]+)|(\{.*?\}+)|(<.*?>+)/g;
 goog.i18n.bidi.guardBracketInText=function(a,b){var c=(void 0===b?goog.i18n.bidi.hasAnyRtl(a):b)?goog.i18n.bidi.Format.RLM:goog.i18n.bidi.Format.LRM;return a.replace(goog.i18n.bidi.bracketGuardTextRe_,c+"$&"+c)};goog.i18n.bidi.enforceRtlInHtml=function(a){return"<"==a.charAt(0)?a.replace(/<\w+/,"$& dir=rtl"):"\n<span dir=rtl>"+a+"</span>"};goog.i18n.bidi.enforceRtlInText=function(a){return goog.i18n.bidi.Format.RLE+a+goog.i18n.bidi.Format.PDF};
 goog.i18n.bidi.enforceLtrInHtml=function(a){return"<"==a.charAt(0)?a.replace(/<\w+/,"$& dir=ltr"):"\n<span dir=ltr>"+a+"</span>"};goog.i18n.bidi.enforceLtrInText=function(a){return goog.i18n.bidi.Format.LRE+a+goog.i18n.bidi.Format.PDF};goog.i18n.bidi.dimensionsRe_=/:\s*([.\d][.\w]*)\s+([.\d][.\w]*)\s+([.\d][.\w]*)\s+([.\d][.\w]*)/g;goog.i18n.bidi.leftRe_=/left/gi;goog.i18n.bidi.rightRe_=/right/gi;goog.i18n.bidi.tempRe_=/%%%%/g;
 goog.i18n.bidi.mirrorCSS=function(a){return a.replace(goog.i18n.bidi.dimensionsRe_,":$1 $4 $3 $2").replace(goog.i18n.bidi.leftRe_,"%%%%").replace(goog.i18n.bidi.rightRe_,goog.i18n.bidi.LEFT).replace(goog.i18n.bidi.tempRe_,goog.i18n.bidi.RIGHT)};goog.i18n.bidi.doubleQuoteSubstituteRe_=/([\u0591-\u05f2])"/g;goog.i18n.bidi.singleQuoteSubstituteRe_=/([\u0591-\u05f2])'/g;
@@ -317,9 +318,10 @@ goog.html.TrustedResourceUrl.prototype.cloneWithParams=function(a,b){var c=goog.
 goog.DEBUG&&(goog.html.TrustedResourceUrl.prototype.toString=function(){return"TrustedResourceUrl{"+this.privateDoNotAccessOrElseTrustedResourceUrlWrappedValue_+"}"});
 goog.html.TrustedResourceUrl.unwrap=function(a){if(a instanceof goog.html.TrustedResourceUrl&&a.constructor===goog.html.TrustedResourceUrl&&a.TRUSTED_RESOURCE_URL_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_===goog.html.TrustedResourceUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_)return a.privateDoNotAccessOrElseTrustedResourceUrlWrappedValue_;goog.asserts.fail("expected object of type TrustedResourceUrl, got '"+a+"' of type "+goog.typeOf(a));return"type_error:TrustedResourceUrl"};
 goog.html.TrustedResourceUrl.format=function(a,b){var c=goog.string.Const.unwrap(a);if(!goog.html.TrustedResourceUrl.BASE_URL_.test(c))throw Error("Invalid TrustedResourceUrl format: "+c);var d=c.replace(goog.html.TrustedResourceUrl.FORMAT_MARKER_,function(a,d){if(!Object.prototype.hasOwnProperty.call(b,d))throw Error('Found marker, "'+d+'", in format string, "'+c+'", but no valid label mapping found in args: '+JSON.stringify(b));var e=b[d];return e instanceof goog.string.Const?goog.string.Const.unwrap(e):
-encodeURIComponent(String(e))});return goog.html.TrustedResourceUrl.createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse(d)};goog.html.TrustedResourceUrl.FORMAT_MARKER_=/%{(\w+)}/g;goog.html.TrustedResourceUrl.BASE_URL_=/^(?:https:)?\/\/[0-9a-z.:[\]-]+\/|^\/[^\/\\]|^about:blank#/i;goog.html.TrustedResourceUrl.URL_PARAM_PARSER_=/^([^?#]*)(\?[^#]*)?(#[\s\S]*)?/;goog.html.TrustedResourceUrl.formatWithParams=function(a,b,c,d){return goog.html.TrustedResourceUrl.format(a,b).cloneWithParams(c,d)};
-goog.html.TrustedResourceUrl.fromConstant=function(a){return goog.html.TrustedResourceUrl.createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse(goog.string.Const.unwrap(a))};goog.html.TrustedResourceUrl.fromConstants=function(a){for(var b="",c=0;c<a.length;c++)b+=goog.string.Const.unwrap(a[c]);return goog.html.TrustedResourceUrl.createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse(b)};goog.html.TrustedResourceUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_={};
-goog.html.TrustedResourceUrl.createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse=function(a){var b=new goog.html.TrustedResourceUrl;b.privateDoNotAccessOrElseTrustedResourceUrlWrappedValue_=a;return b};goog.html.TrustedResourceUrl.stringifyParams_=function(a,b,c){if(null==c)return b;if(goog.isString(c))return a+encodeURIComponent(c);for(var d in c){var e=c[d];e=goog.isArray(e)?e:[e];for(var f=0;f<e.length;f++){var g=e[f];null!=g&&(b+=(b?"&":a)+encodeURIComponent(d)+"="+encodeURIComponent(String(g)))}}return b};goog.html.SafeUrl=function(){this.privateDoNotAccessOrElseSafeHtmlWrappedValue_="";this.SAFE_URL_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_=goog.html.SafeUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_};goog.html.SafeUrl.INNOCUOUS_STRING="about:invalid#zClosurez";goog.html.SafeUrl.prototype.implementsGoogStringTypedString=!0;goog.html.SafeUrl.prototype.getTypedStringValue=function(){return this.privateDoNotAccessOrElseSafeHtmlWrappedValue_};
+encodeURIComponent(String(e))});return goog.html.TrustedResourceUrl.createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse(d)};goog.html.TrustedResourceUrl.FORMAT_MARKER_=/%{(\w+)}/g;goog.html.TrustedResourceUrl.BASE_URL_=/^((https:)?\/\/[0-9a-z.:[\]-]+\/|\/[^/\\]|[^:/\\]+\/|[^:/\\]*[?#]|about:blank#)/i;goog.html.TrustedResourceUrl.URL_PARAM_PARSER_=/^([^?#]*)(\?[^#]*)?(#[\s\S]*)?/;
+goog.html.TrustedResourceUrl.formatWithParams=function(a,b,c,d){return goog.html.TrustedResourceUrl.format(a,b).cloneWithParams(c,d)};goog.html.TrustedResourceUrl.fromConstant=function(a){return goog.html.TrustedResourceUrl.createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse(goog.string.Const.unwrap(a))};goog.html.TrustedResourceUrl.fromConstants=function(a){for(var b="",c=0;c<a.length;c++)b+=goog.string.Const.unwrap(a[c]);return goog.html.TrustedResourceUrl.createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse(b)};
+goog.html.TrustedResourceUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_={};goog.html.TrustedResourceUrl.createTrustedResourceUrlSecurityPrivateDoNotAccessOrElse=function(a){var b=new goog.html.TrustedResourceUrl;b.privateDoNotAccessOrElseTrustedResourceUrlWrappedValue_=a;return b};
+goog.html.TrustedResourceUrl.stringifyParams_=function(a,b,c){if(null==c)return b;if(goog.isString(c))return c?a+encodeURIComponent(c):"";for(var d in c){var e=c[d];e=goog.isArray(e)?e:[e];for(var f=0;f<e.length;f++){var g=e[f];null!=g&&(b||(b=a),b+=(b.length>a.length?"&":"")+encodeURIComponent(d)+"="+encodeURIComponent(String(g)))}}return b};goog.html.SafeUrl=function(){this.privateDoNotAccessOrElseSafeHtmlWrappedValue_="";this.SAFE_URL_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_=goog.html.SafeUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_};goog.html.SafeUrl.INNOCUOUS_STRING="about:invalid#zClosurez";goog.html.SafeUrl.prototype.implementsGoogStringTypedString=!0;goog.html.SafeUrl.prototype.getTypedStringValue=function(){return this.privateDoNotAccessOrElseSafeHtmlWrappedValue_};
 goog.html.SafeUrl.prototype.implementsGoogI18nBidiDirectionalString=!0;goog.html.SafeUrl.prototype.getDirection=function(){return goog.i18n.bidi.Dir.LTR};goog.DEBUG&&(goog.html.SafeUrl.prototype.toString=function(){return"SafeUrl{"+this.privateDoNotAccessOrElseSafeHtmlWrappedValue_+"}"});
 goog.html.SafeUrl.unwrap=function(a){if(a instanceof goog.html.SafeUrl&&a.constructor===goog.html.SafeUrl&&a.SAFE_URL_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_===goog.html.SafeUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_)return a.privateDoNotAccessOrElseSafeHtmlWrappedValue_;goog.asserts.fail("expected object of type SafeUrl, got '"+a+"' of type "+goog.typeOf(a));return"type_error:SafeUrl"};goog.html.SafeUrl.fromConstant=function(a){return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(goog.string.Const.unwrap(a))};
 goog.html.SAFE_MIME_TYPE_PATTERN_=/^(?:audio\/(?:3gpp2|3gpp|aac|L16|midi|mp3|mp4|mpeg|oga|ogg|opus|x-m4a|x-wav|wav|webm)|image\/(?:bmp|gif|jpeg|jpg|png|tiff|webp)|text\/csv|video\/(?:mpeg|mp4|ogg|webm|quicktime))$/i;goog.html.SafeUrl.fromBlob=function(a){a=goog.html.SAFE_MIME_TYPE_PATTERN_.test(a.type)?goog.fs.url.createObjectUrl(a):goog.html.SafeUrl.INNOCUOUS_STRING;return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(a)};goog.html.DATA_URL_PATTERN_=/^data:([^;,]*);base64,[a-z0-9+\/]+=*$/i;
@@ -329,7 +331,7 @@ goog.html.SafeUrl.fromSmsUrl=function(a){goog.string.caseInsensitiveStartsWith(a
 goog.html.SafeUrl.sanitizeChromeExtensionUrl=function(a,b){return goog.html.SafeUrl.sanitizeExtensionUrl_(/^chrome-extension:\/\/([^\/]+)\//,a,b)};goog.html.SafeUrl.sanitizeFirefoxExtensionUrl=function(a,b){return goog.html.SafeUrl.sanitizeExtensionUrl_(/^moz-extension:\/\/([^\/]+)\//,a,b)};goog.html.SafeUrl.sanitizeEdgeExtensionUrl=function(a,b){return goog.html.SafeUrl.sanitizeExtensionUrl_(/^ms-browser-extension:\/\/([^\/]+)\//,a,b)};
 goog.html.SafeUrl.sanitizeExtensionUrl_=function(a,b,c){(a=a.exec(b))?(a=a[1],-1==(c instanceof goog.string.Const?[goog.string.Const.unwrap(c)]:c.map(function(a){return goog.string.Const.unwrap(a)})).indexOf(a)&&(b=goog.html.SafeUrl.INNOCUOUS_STRING)):b=goog.html.SafeUrl.INNOCUOUS_STRING;return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(b)};goog.html.SafeUrl.fromTrustedResourceUrl=function(a){return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(goog.html.TrustedResourceUrl.unwrap(a))};
 goog.html.SAFE_URL_PATTERN_=/^(?:(?:https?|mailto|ftp):|[^:/?#]*(?:[/?#]|$))/i;goog.html.SafeUrl.SAFE_URL_PATTERN=goog.html.SAFE_URL_PATTERN_;goog.html.SafeUrl.sanitize=function(a){if(a instanceof goog.html.SafeUrl)return a;a="object"==typeof a&&a.implementsGoogStringTypedString?a.getTypedStringValue():String(a);goog.html.SAFE_URL_PATTERN_.test(a)||(a=goog.html.SafeUrl.INNOCUOUS_STRING);return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(a)};
-goog.html.SafeUrl.sanitizeAssertUnchanged=function(a){if(a instanceof goog.html.SafeUrl)return a;a="object"==typeof a&&a.implementsGoogStringTypedString?a.getTypedStringValue():String(a);goog.asserts.assert(goog.html.SAFE_URL_PATTERN_.test(a))||(a=goog.html.SafeUrl.INNOCUOUS_STRING);return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(a)};goog.html.SafeUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_={};
+goog.html.SafeUrl.sanitizeAssertUnchanged=function(a){if(a instanceof goog.html.SafeUrl)return a;a="object"==typeof a&&a.implementsGoogStringTypedString?a.getTypedStringValue():String(a);goog.asserts.assert(goog.html.SAFE_URL_PATTERN_.test(a),"%s does not match the safe URL pattern",a)||(a=goog.html.SafeUrl.INNOCUOUS_STRING);return goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse(a)};goog.html.SafeUrl.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_={};
 goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse=function(a){var b=new goog.html.SafeUrl;b.privateDoNotAccessOrElseSafeHtmlWrappedValue_=a;return b};goog.html.SafeUrl.ABOUT_BLANK=goog.html.SafeUrl.createSafeUrlSecurityPrivateDoNotAccessOrElse("about:blank");goog.html.SafeStyle=function(){this.privateDoNotAccessOrElseSafeStyleWrappedValue_="";this.SAFE_STYLE_TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_=goog.html.SafeStyle.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_};goog.html.SafeStyle.prototype.implementsGoogStringTypedString=!0;goog.html.SafeStyle.TYPE_MARKER_GOOG_HTML_SECURITY_PRIVATE_={};
 goog.html.SafeStyle.fromConstant=function(a){a=goog.string.Const.unwrap(a);if(0===a.length)return goog.html.SafeStyle.EMPTY;goog.html.SafeStyle.checkStyle_(a);goog.asserts.assert(goog.string.endsWith(a,";"),"Last character of style string is not ';': "+a);goog.asserts.assert(goog.string.contains(a,":"),"Style string must contain at least one ':', to specify a \"name: value\" pair: "+a);return goog.html.SafeStyle.createSafeStyleSecurityPrivateDoNotAccessOrElse(a)};
 goog.html.SafeStyle.checkStyle_=function(a){goog.asserts.assert(!/[<>]/.test(a),"Forbidden characters in style string: "+a)};goog.html.SafeStyle.prototype.getTypedStringValue=function(){return this.privateDoNotAccessOrElseSafeStyleWrappedValue_};goog.DEBUG&&(goog.html.SafeStyle.prototype.toString=function(){return"SafeStyle{"+this.privateDoNotAccessOrElseSafeStyleWrappedValue_+"}"});
@@ -590,8 +592,9 @@ goog.events.KeyHandler.prototype.handleKeyDown_=function(a){(goog.userAgent.WEBK
 a.keyCode!=goog.events.KeyCodes.META&&(this.lastKey_=goog.events.KeyCodes.META));goog.events.KeyHandler.USES_KEYDOWN_&&!goog.events.KeyCodes.firesKeyPressEvent(a.keyCode,this.lastKey_,a.shiftKey,a.ctrlKey,a.altKey,a.metaKey)?this.handleEvent(a):(this.keyCode_=goog.events.KeyCodes.normalizeKeyCode(a.keyCode),goog.events.KeyHandler.SAVE_ALT_FOR_KEYPRESS_&&(this.altKey_=a.altKey))};goog.events.KeyHandler.prototype.resetState=function(){this.keyCode_=this.lastKey_=-1};
 goog.events.KeyHandler.prototype.handleKeyup_=function(a){this.resetState();this.altKey_=a.altKey};
 goog.events.KeyHandler.prototype.handleEvent=function(a){var b=a.getBrowserEvent(),c=b.altKey;if(goog.userAgent.IE&&a.type==goog.events.EventType.KEYPRESS){var d=this.keyCode_;var e=d!=goog.events.KeyCodes.ENTER&&d!=goog.events.KeyCodes.ESC?b.keyCode:0}else(goog.userAgent.WEBKIT||goog.userAgent.EDGE)&&a.type==goog.events.EventType.KEYPRESS?(d=this.keyCode_,e=0<=b.charCode&&63232>b.charCode&&goog.events.KeyCodes.isCharacterKey(d)?b.charCode:0):goog.userAgent.OPERA&&!goog.userAgent.WEBKIT?(d=this.keyCode_,
-e=goog.events.KeyCodes.isCharacterKey(d)?b.keyCode:0):(d=b.keyCode||this.keyCode_,e=b.charCode||0,goog.events.KeyHandler.SAVE_ALT_FOR_KEYPRESS_&&a.type==goog.events.EventType.KEYPRESS&&(c=this.altKey_),goog.userAgent.MAC&&e==goog.events.KeyCodes.QUESTION_MARK&&d==goog.events.KeyCodes.WIN_KEY&&(d=goog.events.KeyCodes.SLASH));var f=d=goog.events.KeyCodes.normalizeKeyCode(d);d?63232<=d&&d in goog.events.KeyHandler.safariKey_?f=goog.events.KeyHandler.safariKey_[d]:25==d&&a.shiftKey&&(f=9):b.keyIdentifier&&
-b.keyIdentifier in goog.events.KeyHandler.keyIdentifier_&&(f=goog.events.KeyHandler.keyIdentifier_[b.keyIdentifier]);goog.userAgent.GECKO&&goog.events.KeyHandler.USES_KEYDOWN_&&a.type==goog.events.EventType.KEYPRESS&&!goog.events.KeyCodes.firesKeyPressEvent(f,this.lastKey_,a.shiftKey,a.ctrlKey,c,a.metaKey)||(a=f==this.lastKey_,this.lastKey_=f,b=new goog.events.KeyEvent(f,e,a,b),b.altKey=c,this.dispatchEvent(b))};goog.events.KeyHandler.prototype.getElement=function(){return this.element_};
+e=goog.events.KeyCodes.isCharacterKey(d)?b.keyCode:0):(a.type==goog.events.EventType.KEYPRESS?(goog.events.KeyHandler.SAVE_ALT_FOR_KEYPRESS_&&(c=this.altKey_),b.keyCode==b.charCode?32>b.keyCode?(d=b.keyCode,e=0):(d=this.keyCode_,e=b.charCode):(d=b.keyCode||this.keyCode_,e=b.charCode||0)):(d=b.keyCode||this.keyCode_,e=b.charCode||0),goog.userAgent.MAC&&e==goog.events.KeyCodes.QUESTION_MARK&&d==goog.events.KeyCodes.WIN_KEY&&(d=goog.events.KeyCodes.SLASH));var f=d=goog.events.KeyCodes.normalizeKeyCode(d);
+d?63232<=d&&d in goog.events.KeyHandler.safariKey_?f=goog.events.KeyHandler.safariKey_[d]:25==d&&a.shiftKey&&(f=9):b.keyIdentifier&&b.keyIdentifier in goog.events.KeyHandler.keyIdentifier_&&(f=goog.events.KeyHandler.keyIdentifier_[b.keyIdentifier]);goog.userAgent.GECKO&&goog.events.KeyHandler.USES_KEYDOWN_&&a.type==goog.events.EventType.KEYPRESS&&!goog.events.KeyCodes.firesKeyPressEvent(f,this.lastKey_,a.shiftKey,a.ctrlKey,c,a.metaKey)||(a=f==this.lastKey_,this.lastKey_=f,b=new goog.events.KeyEvent(f,
+e,a,b),b.altKey=c,this.dispatchEvent(b))};goog.events.KeyHandler.prototype.getElement=function(){return this.element_};
 goog.events.KeyHandler.prototype.attach=function(a,b){this.keyUpKey_&&this.detach();this.element_=a;this.keyPressKey_=goog.events.listen(this.element_,goog.events.EventType.KEYPRESS,this,b);this.keyDownKey_=goog.events.listen(this.element_,goog.events.EventType.KEYDOWN,this.handleKeyDown_,b,this);this.keyUpKey_=goog.events.listen(this.element_,goog.events.EventType.KEYUP,this.handleKeyup_,b,this)};
 goog.events.KeyHandler.prototype.detach=function(){this.keyPressKey_&&(goog.events.unlistenByKey(this.keyPressKey_),goog.events.unlistenByKey(this.keyDownKey_),goog.events.unlistenByKey(this.keyUpKey_),this.keyUpKey_=this.keyDownKey_=this.keyPressKey_=null);this.element_=null;this.keyCode_=this.lastKey_=-1};goog.events.KeyHandler.prototype.disposeInternal=function(){goog.events.KeyHandler.superClass_.disposeInternal.call(this);this.detach()};
 goog.events.KeyEvent=function(a,b,c,d){goog.events.BrowserEvent.call(this,d);this.type=goog.events.KeyHandler.EventType.KEY;this.keyCode=a;this.charCode=b;this.repeat=c};goog.inherits(goog.events.KeyEvent,goog.events.BrowserEvent);goog.ui.ComponentUtil={};goog.ui.ComponentUtil.getMouseEventType=function(a){return a.pointerEventsEnabled()?goog.events.PointerAsMouseEventType:goog.events.EventType};goog.dom.classlist={};goog.dom.classlist.ALWAYS_USE_DOM_TOKEN_LIST=!1;goog.dom.classlist.get=function(a){if(goog.dom.classlist.ALWAYS_USE_DOM_TOKEN_LIST||a.classList)return a.classList;a=a.className;return goog.isString(a)&&a.match(/\S+/g)||[]};goog.dom.classlist.set=function(a,b){a.className=b};goog.dom.classlist.contains=function(a,b){return goog.dom.classlist.ALWAYS_USE_DOM_TOKEN_LIST||a.classList?a.classList.contains(b):goog.array.contains(goog.dom.classlist.get(a),b)};
@@ -754,7 +757,7 @@ goog.debug.Logger.prototype.callPublish_=function(a){if(this.handlers_)for(var b
 goog.debug.LogManager.initialize=function(){goog.debug.LogManager.rootLogger_||(goog.debug.LogManager.rootLogger_=new goog.debug.Logger(goog.debug.Logger.ROOT_LOGGER_NAME),goog.debug.LogManager.loggers_[goog.debug.Logger.ROOT_LOGGER_NAME]=goog.debug.LogManager.rootLogger_,goog.debug.LogManager.rootLogger_.setLevel(goog.debug.Logger.Level.CONFIG))};goog.debug.LogManager.getLoggers=function(){return goog.debug.LogManager.loggers_};
 goog.debug.LogManager.getRoot=function(){goog.debug.LogManager.initialize();return goog.debug.LogManager.rootLogger_};goog.debug.LogManager.getLogger=function(a){goog.debug.LogManager.initialize();return goog.debug.LogManager.loggers_[a]||goog.debug.LogManager.createLogger_(a)};goog.debug.LogManager.createFunctionForCatchErrors=function(a){return function(b){(a||goog.debug.LogManager.getRoot()).severe("Error: "+b.message+" ("+b.fileName+" @ Line: "+b.line+")")}};
 goog.debug.LogManager.createLogger_=function(a){var b=new goog.debug.Logger(a);if(goog.debug.Logger.ENABLE_HIERARCHY){var c=a.lastIndexOf("."),d=a.substr(0,c);c=a.substr(c+1);d=goog.debug.LogManager.getLogger(d);d.addChild_(c,b);b.setParent_(d)}return goog.debug.LogManager.loggers_[a]=b};goog.log={};goog.log.ENABLED=goog.debug.LOGGING_ENABLED;goog.log.ROOT_LOGGER_NAME=goog.debug.Logger.ROOT_LOGGER_NAME;goog.log.Logger=goog.debug.Logger;goog.log.Level=goog.debug.Logger.Level;goog.log.LogRecord=goog.debug.LogRecord;goog.log.getLogger=function(a,b){if(goog.log.ENABLED){var c=goog.debug.LogManager.getLogger(a);b&&c&&c.setLevel(b);return c}return null};goog.log.addHandler=function(a,b){goog.log.ENABLED&&a&&a.addHandler(b)};
-goog.log.removeHandler=function(a,b){return goog.log.ENABLED&&a?a.removeHandler(b):!1};goog.log.log=function(a,b,c,d){goog.log.ENABLED&&a&&a.log(b,c,d)};goog.log.error=function(a,b,c){goog.log.ENABLED&&a&&a.severe(b,c)};goog.log.warning=function(a,b,c){goog.log.ENABLED&&a&&a.warning(b,c)};goog.log.info=function(a,b,c){goog.log.ENABLED&&a&&a.info(b,c)};goog.log.fine=function(a,b,c){goog.log.ENABLED&&a&&a.fine(b,c)};goog.Thenable=function(){};goog.Thenable.prototype.then=function(a,b,c){};goog.Thenable.IMPLEMENTED_BY_PROP="$goog_Thenable";goog.Thenable.addImplementation=function(a){a.prototype.then=a.prototype.then;COMPILED?a.prototype[goog.Thenable.IMPLEMENTED_BY_PROP]=!0:a.prototype.$goog_Thenable=!0};goog.Thenable.isImplementedBy=function(a){if(!a)return!1;try{return COMPILED?!!a[goog.Thenable.IMPLEMENTED_BY_PROP]:!!a.$goog_Thenable}catch(b){return!1}};goog.async={};goog.async.FreeList=function(a,b,c){this.limit_=c;this.create_=a;this.reset_=b;this.occupants_=0;this.head_=null};goog.async.FreeList.prototype.get=function(){if(0<this.occupants_){this.occupants_--;var a=this.head_;this.head_=a.next;a.next=null}else a=this.create_();return a};goog.async.FreeList.prototype.put=function(a){this.reset_(a);this.occupants_<this.limit_&&(this.occupants_++,a.next=this.head_,this.head_=a)};goog.async.FreeList.prototype.occupants=function(){return this.occupants_};goog.async.WorkQueue=function(){this.workTail_=this.workHead_=null};goog.async.WorkQueue.DEFAULT_MAX_UNUSED=100;goog.async.WorkQueue.freelist_=new goog.async.FreeList(function(){return new goog.async.WorkItem},function(a){a.reset()},goog.async.WorkQueue.DEFAULT_MAX_UNUSED);goog.async.WorkQueue.prototype.add=function(a,b){var c=this.getUnusedItem_();c.set(a,b);this.workTail_?this.workTail_.next=c:(goog.asserts.assert(!this.workHead_),this.workHead_=c);this.workTail_=c};
+goog.log.removeHandler=function(a,b){return goog.log.ENABLED&&a?a.removeHandler(b):!1};goog.log.log=function(a,b,c,d){goog.log.ENABLED&&a&&a.log(b,c,d)};goog.log.error=function(a,b,c){goog.log.ENABLED&&a&&a.severe(b,c)};goog.log.warning=function(a,b,c){goog.log.ENABLED&&a&&a.warning(b,c)};goog.log.info=function(a,b,c){goog.log.ENABLED&&a&&a.info(b,c)};goog.log.fine=function(a,b,c){goog.log.ENABLED&&a&&a.fine(b,c)};goog.Thenable=function(){};goog.Thenable.prototype.then=function(a,b,c){};goog.Thenable.IMPLEMENTED_BY_PROP="$goog_Thenable";goog.Thenable.addImplementation=function(a){COMPILED?a.prototype[goog.Thenable.IMPLEMENTED_BY_PROP]=!0:a.prototype.$goog_Thenable=!0};goog.Thenable.isImplementedBy=function(a){if(!a)return!1;try{return COMPILED?!!a[goog.Thenable.IMPLEMENTED_BY_PROP]:!!a.$goog_Thenable}catch(b){return!1}};goog.async={};goog.async.FreeList=function(a,b,c){this.limit_=c;this.create_=a;this.reset_=b;this.occupants_=0;this.head_=null};goog.async.FreeList.prototype.get=function(){if(0<this.occupants_){this.occupants_--;var a=this.head_;this.head_=a.next;a.next=null}else a=this.create_();return a};goog.async.FreeList.prototype.put=function(a){this.reset_(a);this.occupants_<this.limit_&&(this.occupants_++,a.next=this.head_,this.head_=a)};goog.async.FreeList.prototype.occupants=function(){return this.occupants_};goog.async.WorkQueue=function(){this.workTail_=this.workHead_=null};goog.async.WorkQueue.DEFAULT_MAX_UNUSED=100;goog.async.WorkQueue.freelist_=new goog.async.FreeList(function(){return new goog.async.WorkItem},function(a){a.reset()},goog.async.WorkQueue.DEFAULT_MAX_UNUSED);goog.async.WorkQueue.prototype.add=function(a,b){var c=this.getUnusedItem_();c.set(a,b);this.workTail_?this.workTail_.next=c:(goog.asserts.assert(!this.workHead_),this.workHead_=c);this.workTail_=c};
 goog.async.WorkQueue.prototype.remove=function(){var a=null;this.workHead_&&(a=this.workHead_,this.workHead_=this.workHead_.next,this.workHead_||(this.workTail_=null),a.next=null);return a};goog.async.WorkQueue.prototype.returnUnused=function(a){goog.async.WorkQueue.freelist_.put(a)};goog.async.WorkQueue.prototype.getUnusedItem_=function(){return goog.async.WorkQueue.freelist_.get()};goog.async.WorkItem=function(){this.next=this.scope=this.fn=null};
 goog.async.WorkItem.prototype.set=function(a,b){this.fn=a;this.scope=b;this.next=null};goog.async.WorkItem.prototype.reset=function(){this.next=this.scope=this.fn=null};goog.async.throwException=function(a){goog.global.setTimeout(function(){throw a;},0)};goog.async.nextTick=function(a,b,c){var d=a;b&&(d=goog.bind(a,b));d=goog.async.nextTick.wrapCallback_(d);goog.isFunction(goog.global.setImmediate)&&(c||goog.async.nextTick.useSetImmediate_())?goog.global.setImmediate(d):(goog.async.nextTick.setImmediate_||(goog.async.nextTick.setImmediate_=goog.async.nextTick.getSetImmediateEmulator_()),goog.async.nextTick.setImmediate_(d))};
 goog.async.nextTick.useSetImmediate_=function(){return goog.global.Window&&goog.global.Window.prototype&&!goog.labs.userAgent.browser.isEdge()&&goog.global.Window.prototype.setImmediate==goog.global.setImmediate?!1:!0};
@@ -896,7 +899,7 @@ Blockly.utils.is3dSupported=function(){if(void 0!==Blockly.utils.is3dSupported.c
 if(!b)return document.body.removeChild(a),!1;b=b.getPropertyValue(c[d])}document.body.removeChild(a);Blockly.utils.is3dSupported.cached_="none"!==b;return Blockly.utils.is3dSupported.cached_};Blockly.utils.insertAfter=function(a,b){var c=b.nextSibling,d=b.parentNode;if(!d)throw Error("Reference node has no parent.");c?d.insertBefore(a,c):d.appendChild(a)};
 Blockly.utils.runAfterPageLoad=function(a){if("object"!=typeof document)throw Error("Blockly.utils.runAfterPageLoad() requires browser document.");if("complete"==document.readyState)a();else var b=setInterval(function(){"complete"==document.readyState&&(clearInterval(b),a())},10)};Blockly.utils.setCssTransform=function(a,b){a.style.transform=b;a.style["-webkit-transform"]=b};
 Blockly.utils.getViewportBBox=function(){var a=goog.dom.getViewportSize(),b=goog.style.getViewportPageOffset(document);return{right:a.width+b.x,bottom:a.height+b.y,top:b.y,left:b.x}};Blockly.utils.startsWith=function(a,b){return 0==a.lastIndexOf(b,0)};Blockly.utils.arrayRemove=function(a,b){var c=a.indexOf(b);if(-1==c)return!1;a.splice(c,1);return!0};Blockly.utils.toRadians=function(a){return a*Math.PI/180};Blockly.utils.toDegrees=function(a){return 180*a/Math.PI};
-Blockly.utils.containsNode=function(a,b){return!!(a.compareDocumentPosition(b)&Node.DOCUMENT_POSITION_CONTAINED_BY)};
+Blockly.utils.containsNode=function(a,b){return!!(a.compareDocumentPosition(b)&Node.DOCUMENT_POSITION_CONTAINED_BY)};Blockly.utils.getBlockTypeCounts=function(a,b){var c=Object.create(null),d=a.getDescendants(!0);if(b){var e=a.getNextBlock();e&&(e=d.indexOf(e),d.splice(e,d.length-e))}e=0;for(var f;f=d[e];e++)c[f.type]?c[f.type]++:c[f.type]=1;return c};
 Blockly.Touch={};Blockly.Touch.touchIdentifier_=null;Blockly.Touch.TOUCH_MAP={};
 goog.global.PointerEvent?Blockly.Touch.TOUCH_MAP={mousedown:["pointerdown"],mouseenter:["pointerenter"],mouseleave:["pointerleave"],mousemove:["pointermove"],mouseout:["pointerout"],mouseover:["pointerover"],mouseup:["pointerup","pointercancel"],touchend:["pointerup"],touchcancel:["pointercancel"]}:goog.events.BrowserFeature.TOUCH_ENABLED&&(Blockly.Touch.TOUCH_MAP={mousedown:["touchstart"],mousemove:["touchmove"],mouseup:["touchend","touchcancel"]});Blockly.longPid_=0;
 Blockly.longStart_=function(a,b){Blockly.longStop_();a.changedTouches&&1!=a.changedTouches.length||(Blockly.longPid_=setTimeout(function(){a.changedTouches&&(a.button=2,a.clientX=a.changedTouches[0].clientX,a.clientY=a.changedTouches[0].clientY);b&&b.handleRightClick(a)},Blockly.LONGPRESS))};Blockly.longStop_=function(){Blockly.longPid_&&(clearTimeout(Blockly.longPid_),Blockly.longPid_=0)};Blockly.Touch.clearTouchIdentifier=function(){Blockly.Touch.touchIdentifier_=null};
@@ -952,7 +955,7 @@ Blockly.Xml.fieldToDom_=function(a){if(a.name&&a.EDITABLE){if(a.referencesVariab
 Blockly.Xml.blockToDom=function(a,b){var c=Blockly.Xml.utils.createElement(a.isShadow()?"shadow":"block");c.setAttribute("type",a.type);b||c.setAttribute("id",a.id);if(a.mutationToDom){var d=a.mutationToDom();d&&(d.hasChildNodes()||d.hasAttributes())&&c.appendChild(d)}Blockly.Xml.allFieldsToDom_(a,c);var e=a.getCommentText();e&&(d=Blockly.Xml.utils.createElement("comment"),d.appendChild(Blockly.Xml.utils.createTextNode(e)),"object"==typeof a.comment&&(d.setAttribute("pinned",a.comment.isVisible()),
 e=a.comment.getBubbleSize(),d.setAttribute("h",e.height),d.setAttribute("w",e.width)),c.appendChild(d));a.data&&(d=Blockly.Xml.utils.createElement("data"),d.appendChild(Blockly.Xml.utils.createTextNode(a.data)),c.appendChild(d));e=0;for(var f;f=a.inputList[e];e++){var g,h=!0;if(f.type!=Blockly.DUMMY_INPUT){var k=f.connection.targetBlock();f.type==Blockly.INPUT_VALUE?g=Blockly.Xml.utils.createElement("value"):f.type==Blockly.NEXT_STATEMENT&&(g=Blockly.Xml.utils.createElement("statement"));d=f.connection.getShadowDom();
 !d||k&&k.isShadow()||g.appendChild(Blockly.Xml.cloneShadow_(d));k&&(g.appendChild(Blockly.Xml.blockToDom(k,b)),h=!1);g.setAttribute("name",f.name);h||c.appendChild(g)}}a.inputsInlineDefault!=a.inputsInline&&c.setAttribute("inline",a.inputsInline);a.isCollapsed()&&c.setAttribute("collapsed",!0);a.disabled&&c.setAttribute("disabled",!0);a.isDeletable()||a.isShadow()||c.setAttribute("deletable",!1);a.isMovable()||a.isShadow()||c.setAttribute("movable",!1);a.isEditable()||c.setAttribute("editable",!1);
-if(e=a.getNextBlock())g=Blockly.Xml.utils.createElement("next"),g.appendChild(Blockly.Xml.utils.createTextNode(Blockly.Xml.blockToDom(e,b))),c.appendChild(g);d=a.nextConnection&&a.nextConnection.getShadowDom();!d||e&&e.isShadow()||g.appendChild(Blockly.Xml.cloneShadow_(d));return c};
+if(e=a.getNextBlock())g=Blockly.Xml.utils.createElement("next"),g.appendChild(Blockly.Xml.blockToDom(e,b)),c.appendChild(g);d=a.nextConnection&&a.nextConnection.getShadowDom();!d||e&&e.isShadow()||g.appendChild(Blockly.Xml.cloneShadow_(d));return c};
 Blockly.Xml.cloneShadow_=function(a){for(var b=a=a.cloneNode(!0),c;b;)if(b.firstChild)b=b.firstChild;else{for(;b&&!b.nextSibling;)c=b,b=b.parentNode,3==c.nodeType&&""==c.data.trim()&&b.firstChild!=c&&Blockly.utils.removeNode(c);b&&(c=b,b=b.nextSibling,3==c.nodeType&&""==c.data.trim()&&Blockly.utils.removeNode(c))}return a};Blockly.Xml.domToText=function(a){return Blockly.Xml.utils.domToText(a)};
 Blockly.Xml.domToPrettyText=function(a){a=Blockly.Xml.domToText(a).split("<");for(var b="",c=1;c<a.length;c++){var d=a[c];"/"==d[0]&&(b=b.substring(2));a[c]=b+"<"+d;"/"!=d[0]&&"/>"!=d.slice(-2)&&(b+="  ")}a=a.join("\n");a=a.replace(/(<(\w+)\b[^>]*>[^\n]*)\n *<\/\2>/g,"$1</$2>");return a.replace(/^\n/,"")};
 Blockly.Xml.textToDom=function(a){a=Blockly.Xml.utils.textToDomDocument(a);if(!a||!a.documentElement||"xml"!=a.documentElement.nodeName.toLowerCase())throw TypeError("Blockly.Xml.textToDom expected an <xml> document.");return a.documentElement};Blockly.Xml.clearWorkspaceAndLoadFromXml=function(a,b){b.setResizesEnabled(!1);b.clear();var c=Blockly.Xml.domToWorkspace(a,b);b.setResizesEnabled(!0);return c};
@@ -988,17 +991,21 @@ Blockly.WorkspaceComment.prototype.setDeletable=function(a){this.deletable_=a};B
 Blockly.WorkspaceComment.prototype.setContent=function(a){this.content_!=a&&(Blockly.Events.fire(new Blockly.Events.CommentChange(this,this.content_,a)),this.content_=a)};Blockly.WorkspaceComment.prototype.toXmlWithXY=function(a){a=this.toXml(a);a.setAttribute("x",Math.round(this.xy_.x));a.setAttribute("y",Math.round(this.xy_.y));a.setAttribute("h",this.height_);a.setAttribute("w",this.width_);return a};
 Blockly.WorkspaceComment.prototype.toXml=function(a){var b=Blockly.Xml.utils.createElement("comment");a||b.setAttribute("id",this.id);b.textContent=this.getContent();return b};Blockly.WorkspaceComment.fireCreateEvent=function(a){if(Blockly.Events.isEnabled()){var b=Blockly.Events.getGroup();b||Blockly.Events.setGroup(!0);try{Blockly.Events.fire(new Blockly.Events.CommentCreate(a))}finally{b||Blockly.Events.setGroup(!1)}}};
 Blockly.WorkspaceComment.fromXml=function(a,b){var c=Blockly.WorkspaceComment.parseAttributes(a);c=new Blockly.WorkspaceComment(b,c.content,c.h,c.w,c.id);var d=parseInt(a.getAttribute("x"),10),e=parseInt(a.getAttribute("y"),10);isNaN(d)||isNaN(e)||c.moveBy(d,e);Blockly.WorkspaceComment.fireCreateEvent(c);return c};
-Blockly.WorkspaceComment.parseAttributes=function(a){var b=a.getAttribute("h"),c=a.getAttribute("w");return{id:a.getAttribute("id"),h:b?parseInt(b,10):100,w:c?parseInt(c,10):100,x:parseInt(a.getAttribute("x"),10),y:parseInt(a.getAttribute("y"),10),content:a.textContent}};Blockly.Workspace=function(a){this.id=Blockly.utils.genUid();Blockly.Workspace.WorkspaceDB_[this.id]=this;this.options=a||{};this.RTL=!!this.options.RTL;this.horizontalLayout=!!this.options.horizontalLayout;this.toolboxPosition=this.options.toolboxPosition;this.topBlocks_=[];this.topComments_=[];this.commentDB_=Object.create(null);this.listeners_=[];this.undoStack_=[];this.redoStack_=[];this.blockDB_=Object.create(null);this.variableMap_=new Blockly.VariableMap(this);this.potentialVariableMap_=null};
-Blockly.Workspace.prototype.rendered=!1;Blockly.Workspace.prototype.isClearing=!1;Blockly.Workspace.prototype.MAX_UNDO=1024;Blockly.Workspace.prototype.dispose=function(){this.listeners_.length=0;this.clear();delete Blockly.Workspace.WorkspaceDB_[this.id]};Blockly.Workspace.SCAN_ANGLE=3;Blockly.Workspace.prototype.addTopBlock=function(a){this.topBlocks_.push(a)};
-Blockly.Workspace.prototype.removeTopBlock=function(a){if(!Blockly.utils.arrayRemove(this.topBlocks_,a))throw Error("Block not present in workspace's list of top-most blocks.");};Blockly.Workspace.prototype.getTopBlocks=function(a){var b=[].concat(this.topBlocks_);if(a&&1<b.length){var c=Math.sin(Blockly.utils.toRadians(Blockly.Workspace.SCAN_ANGLE));this.RTL&&(c*=-1);b.sort(function(a,b){var d=a.getRelativeToSurfaceXY(),e=b.getRelativeToSurfaceXY();return d.y+c*d.x-(e.y+c*e.x)})}return b};
+Blockly.WorkspaceComment.parseAttributes=function(a){var b=a.getAttribute("h"),c=a.getAttribute("w");return{id:a.getAttribute("id"),h:b?parseInt(b,10):100,w:c?parseInt(c,10):100,x:parseInt(a.getAttribute("x"),10),y:parseInt(a.getAttribute("y"),10),content:a.textContent}};Blockly.Workspace=function(a){this.id=Blockly.utils.genUid();Blockly.Workspace.WorkspaceDB_[this.id]=this;this.options=a||{};this.RTL=!!this.options.RTL;this.horizontalLayout=!!this.options.horizontalLayout;this.toolboxPosition=this.options.toolboxPosition;this.topBlocks_=[];this.topComments_=[];this.commentDB_=Object.create(null);this.listeners_=[];this.undoStack_=[];this.redoStack_=[];this.blockDB_=Object.create(null);this.typedBlocksDB_=Object.create(null);this.variableMap_=new Blockly.VariableMap(this);
+this.potentialVariableMap_=null};Blockly.Workspace.prototype.rendered=!1;Blockly.Workspace.prototype.isClearing=!1;Blockly.Workspace.prototype.MAX_UNDO=1024;Blockly.Workspace.prototype.dispose=function(){this.listeners_.length=0;this.clear();delete Blockly.Workspace.WorkspaceDB_[this.id]};Blockly.Workspace.SCAN_ANGLE=3;
+Blockly.Workspace.prototype.sortObjects_=function(a,b){var c=a.getRelativeToSurfaceXY(),d=b.getRelativeToSurfaceXY();return c.y+Blockly.Workspace.prototype.sortObjects_.offset*c.x-(d.y+Blockly.Workspace.prototype.sortObjects_.offset*d.x)};Blockly.Workspace.prototype.addTopBlock=function(a){this.topBlocks_.push(a)};Blockly.Workspace.prototype.removeTopBlock=function(a){if(!Blockly.utils.arrayRemove(this.topBlocks_,a))throw Error("Block not present in workspace's list of top-most blocks.");};
+Blockly.Workspace.prototype.getTopBlocks=function(a){var b=[].concat(this.topBlocks_);a&&1<b.length&&(this.sortObjects_.offset=Math.sin(Blockly.utils.toRadians(Blockly.Workspace.SCAN_ANGLE)),this.RTL&&(this.sortObjects_.offset*=-1),b.sort(this.sortObjects_));return b};Blockly.Workspace.prototype.addTypedBlock=function(a){this.typedBlocksDB_[a.type]||(this.typedBlocksDB_[a.type]=[]);this.typedBlocksDB_[a.type].push(a)};
+Blockly.Workspace.prototype.removeTypedBlock=function(a){this.typedBlocksDB_[a.type].splice(this.typedBlocksDB_[a.type].indexOf(a),1);this.typedBlocksDB_[a.type].length||delete this.typedBlocksDB_[a.type]};
+Blockly.Workspace.prototype.getBlocksByType=function(a,b){if(!this.typedBlocksDB_[a])return[];var c=this.typedBlocksDB_[a].slice(0);b&&1<c.length&&(this.sortObjects_.offset=Math.sign(Blockly.utils.toRadians(Blockly.Workspace.SCAN_ANGLE)),this.RTL&&(this.sortObjects_.offset*=-1),c.sort(this.sortObjects_));return c};
 Blockly.Workspace.prototype.addTopComment=function(a){this.topComments_.push(a);this.commentDB_[a.id]&&console.warn('Overriding an existing comment on this workspace, with id "'+a.id+'"');this.commentDB_[a.id]=a};Blockly.Workspace.prototype.removeTopComment=function(a){if(!Blockly.utils.arrayRemove(this.topComments_,a))throw Error("Comment not present in workspace's list of top-most comments.");delete this.commentDB_[a.id]};
-Blockly.Workspace.prototype.getTopComments=function(a){var b=[].concat(this.topComments_);if(a&&1<b.length){var c=Math.sin(Blockly.utils.toRadians(Blockly.Workspace.SCAN_ANGLE));this.RTL&&(c*=-1);b.sort(function(a,b){var d=a.getRelativeToSurfaceXY(),e=b.getRelativeToSurfaceXY();return d.y+c*d.x-(e.y+c*e.x)})}return b};
+Blockly.Workspace.prototype.getTopComments=function(a){var b=[].concat(this.topComments_);a&&1<b.length&&(this.sortObjects_.offset=Math.sin(Blockly.utils.toRadians(Blockly.Workspace.SCAN_ANGLE)),this.RTL&&(this.sortObjects_.offset*=-1),b.sort(this.sortObjects_));return b};
 Blockly.Workspace.prototype.getAllBlocks=function(a){if(a){a=this.getTopBlocks(!0);for(var b=[],c=0;c<a.length;c++)b.push.apply(b,a[c].getDescendants(!0))}else for(b=this.getTopBlocks(!1),c=0;c<b.length;c++)b.push.apply(b,b[c].getChildren(!1));return b};
 Blockly.Workspace.prototype.clear=function(){this.isClearing=!0;try{var a=Blockly.Events.getGroup();for(a||Blockly.Events.setGroup(!0);this.topBlocks_.length;)this.topBlocks_[0].dispose();for(;this.topComments_.length;)this.topComments_[this.topComments_.length-1].dispose();a||Blockly.Events.setGroup(!1);this.variableMap_.clear();this.potentialVariableMap_&&this.potentialVariableMap_.clear()}finally{this.isClearing=!1}};
 Blockly.Workspace.prototype.renameVariableById=function(a,b){this.variableMap_.renameVariableById(a,b)};Blockly.Workspace.prototype.createVariable=function(a,b,c){return this.variableMap_.createVariable(a,b,c)};Blockly.Workspace.prototype.getVariableUsesById=function(a){return this.variableMap_.getVariableUsesById(a)};Blockly.Workspace.prototype.deleteVariableById=function(a){this.variableMap_.deleteVariableById(a)};
 Blockly.Workspace.prototype.deleteVariableInternal_=function(a,b){this.variableMap_.deleteVariableInternal_(a,b)};Blockly.Workspace.prototype.variableIndexOf=function(a){console.warn("Deprecated call to Blockly.Workspace.prototype.variableIndexOf");return-1};Blockly.Workspace.prototype.getVariable=function(a,b){return this.variableMap_.getVariable(a,b)};Blockly.Workspace.prototype.getVariableById=function(a){return this.variableMap_.getVariableById(a)};
 Blockly.Workspace.prototype.getVariablesOfType=function(a){return this.variableMap_.getVariablesOfType(a)};Blockly.Workspace.prototype.getVariableTypes=function(){return this.variableMap_.getVariableTypes()};Blockly.Workspace.prototype.getAllVariables=function(){return this.variableMap_.getAllVariables()};Blockly.Workspace.prototype.getWidth=function(){return 0};Blockly.Workspace.prototype.newBlock=function(a,b){return new Blockly.Block(this,a,b)};
-Blockly.Workspace.prototype.remainingCapacity=function(){return isNaN(this.options.maxBlocks)?Infinity:this.options.maxBlocks-this.getAllBlocks().length};
+Blockly.Workspace.prototype.remainingCapacity=function(){return isNaN(this.options.maxBlocks)?Infinity:this.options.maxBlocks-this.getAllBlocks().length};Blockly.Workspace.prototype.remainingCapacityOfType=function(a){return this.options.maxInstances?(this.options.maxInstances[a]||Infinity)-this.getBlocksByType(a).length:Infinity};
+Blockly.Workspace.prototype.isCapacityAvailable=function(a){if(!this.hasBlockLimits())return!0;var b=0,c;for(c in a){if(a[c]>this.remainingCapacityOfType(c))return!1;b+=a[c]}return b>this.remainingCapacity()?!1:!0};Blockly.Workspace.prototype.hasBlockLimits=function(){return Infinity!=this.options.maxBlocks||!!this.options.maxInstances};
 Blockly.Workspace.prototype.undo=function(a){var b=a?this.redoStack_:this.undoStack_,c=a?this.undoStack_:this.redoStack_,d=b.pop();if(d){for(var e=[d];b.length&&d.group&&d.group==b[b.length-1].group;)e.push(b.pop());for(b=0;d=e[b];b++)c.push(d);e=Blockly.Events.filter(e,a);Blockly.Events.recordUndo=!1;try{for(b=0;d=e[b];b++)d.run(a)}finally{Blockly.Events.recordUndo=!0}}};Blockly.Workspace.prototype.clearUndo=function(){this.undoStack_.length=0;this.redoStack_.length=0;Blockly.Events.clearPendingUndo()};
 Blockly.Workspace.prototype.addChangeListener=function(a){this.listeners_.push(a);return a};Blockly.Workspace.prototype.removeChangeListener=function(a){Blockly.utils.arrayRemove(this.listeners_,a)};Blockly.Workspace.prototype.fireChangeListener=function(a){if(a.recordUndo)for(this.undoStack_.push(a),this.redoStack_.length=0;this.undoStack_.length>this.MAX_UNDO&&0<=this.MAX_UNDO;)this.undoStack_.shift();for(var b=0,c;c=this.listeners_[b];b++)c(a)};
 Blockly.Workspace.prototype.getBlockById=function(a){return this.blockDB_[a]||null};Blockly.Workspace.prototype.getCommentById=function(a){return this.commentDB_[a]||null};Blockly.Workspace.prototype.allInputsFilled=function(a){for(var b=this.getTopBlocks(!1),c=0,d;d=b[c];c++)if(!d.allInputsFilled(a))return!1;return!0};Blockly.Workspace.prototype.getPotentialVariableMap=function(){return this.potentialVariableMap_};
@@ -1026,7 +1033,7 @@ Blockly.Bubble.prototype.getRelativeToSurfaceXY=function(){return new goog.math.
 Blockly.Events.Ui.prototype.toJson=function(){var a=Blockly.Events.Ui.superClass_.toJson.call(this);a.element=this.element;void 0!==this.newValue&&(a.newValue=this.newValue);this.blockId&&(a.blockId=this.blockId);return a};Blockly.Events.Ui.prototype.fromJson=function(a){Blockly.Events.Ui.superClass_.fromJson.call(this,a);this.element=a.element;this.newValue=a.newValue;this.blockId=a.blockId};Blockly.Icon=function(a){this.block_=a};Blockly.Icon.prototype.collapseHidden=!0;Blockly.Icon.prototype.SIZE=17;Blockly.Icon.prototype.bubble_=null;Blockly.Icon.prototype.iconXY_=null;
 Blockly.Icon.prototype.createIcon=function(){this.iconGroup_||(this.iconGroup_=Blockly.utils.createSvgElement("g",{"class":"blocklyIconGroup"},null),this.block_.isInFlyout&&Blockly.utils.addClass(this.iconGroup_,"blocklyIconGroupReadonly"),this.drawIcon_(this.iconGroup_),this.block_.getSvgRoot().appendChild(this.iconGroup_),Blockly.bindEventWithChecks_(this.iconGroup_,"mouseup",this,this.iconClick_),this.updateEditable())};
 Blockly.Icon.prototype.dispose=function(){Blockly.utils.removeNode(this.iconGroup_);this.iconGroup_=null;this.setVisible(!1);this.block_=null};Blockly.Icon.prototype.updateEditable=function(){};Blockly.Icon.prototype.isVisible=function(){return!!this.bubble_};Blockly.Icon.prototype.iconClick_=function(a){this.block_.workspace.isDragging()||this.block_.isInFlyout||Blockly.utils.isRightButton(a)||this.setVisible(!this.isVisible())};Blockly.Icon.prototype.updateColour=function(){this.isVisible()&&this.bubble_.setColour(this.block_.getColour())};
-Blockly.Icon.prototype.renderIcon=function(a){if(this.collapseHidden&&this.block_.isCollapsed())return this.iconGroup_.setAttribute("display","none"),a;this.iconGroup_.setAttribute("display","block");var b=this.SIZE;this.block_.RTL&&(a-=b);this.iconGroup_.setAttribute("transform","translate("+a+",5)");this.computeIconLocation();return a=this.block_.RTL?a-Blockly.BlockSvg.SEP_SPACE_X:a+(b+Blockly.BlockSvg.SEP_SPACE_X)};
+Blockly.Icon.prototype.renderIcon=function(a){if(this.collapseHidden&&this.block_.isCollapsed()||this.block_.isInsertionMarker())return this.iconGroup_.setAttribute("display","none"),a;this.iconGroup_.setAttribute("display","block");var b=this.SIZE;this.block_.RTL&&(a-=b);this.iconGroup_.setAttribute("transform","translate("+a+",5)");this.computeIconLocation();return a=this.block_.RTL?a-Blockly.BlockSvg.SEP_SPACE_X:a+(b+Blockly.BlockSvg.SEP_SPACE_X)};
 Blockly.Icon.prototype.setIconLocation=function(a){this.iconXY_=a;this.isVisible()&&this.bubble_.setAnchorLocation(a)};Blockly.Icon.prototype.computeIconLocation=function(){var a=this.block_.getRelativeToSurfaceXY(),b=Blockly.utils.getRelativeXY(this.iconGroup_);a=new goog.math.Coordinate(a.x+b.x+this.SIZE/2,a.y+b.y+this.SIZE/2);goog.math.Coordinate.equals(this.getIconLocation(),a)||this.setIconLocation(a)};Blockly.Icon.prototype.getIconLocation=function(){return this.iconXY_};
 Blockly.Comment=function(a){Blockly.Comment.superClass_.constructor.call(this,a);this.createIcon()};goog.inherits(Blockly.Comment,Blockly.Icon);Blockly.Comment.prototype.text_="";Blockly.Comment.prototype.width_=160;Blockly.Comment.prototype.height_=80;
 Blockly.Comment.prototype.drawIcon_=function(a){Blockly.utils.createSvgElement("circle",{"class":"blocklyIconShape",r:"8",cx:"8",cy:"8"},a);Blockly.utils.createSvgElement("path",{"class":"blocklyIconSymbol",d:"m6.8,10h2c0.003,-0.617 0.271,-0.962 0.633,-1.266 2.875,-2.4050.607,-5.534 -3.765,-3.874v1.7c3.12,-1.657 3.698,0.118 2.336,1.25-1.201,0.998 -1.201,1.528 -1.204,2.19z"},a);Blockly.utils.createSvgElement("rect",{"class":"blocklyIconSymbol",x:"6.8",y:"10.78",height:"2",width:"2"},a)};
@@ -1046,8 +1053,9 @@ Blockly.Connection.prototype.canConnectWithReason_=function(a){if(!a)return Bloc
 Blockly.Connection.CAN_CONNECT:Blockly.Connection.REASON_CHECKS_FAILED};
 Blockly.Connection.prototype.checkConnection_=function(a){switch(this.canConnectWithReason_(a)){case Blockly.Connection.CAN_CONNECT:break;case Blockly.Connection.REASON_SELF_CONNECTION:throw Error("Attempted to connect a block to itself.");case Blockly.Connection.REASON_DIFFERENT_WORKSPACES:throw Error("Blocks not on same workspace.");case Blockly.Connection.REASON_WRONG_TYPE:throw Error("Attempt to connect incompatible types.");case Blockly.Connection.REASON_TARGET_NULL:throw Error("Target connection is null.");
 case Blockly.Connection.REASON_CHECKS_FAILED:throw Error("Connection checks failed. "+(this+" expected "+this.check_+", found "+a.check_));case Blockly.Connection.REASON_SHADOW_PARENT:throw Error("Connecting non-shadow to shadow block.");default:throw Error("Unknown connection failure: this should never happen!");}};
-Blockly.Connection.prototype.isConnectionAllowed=function(a){if(this.canConnectWithReason_(a)!=Blockly.Connection.CAN_CONNECT)return!1;switch(a.type){case Blockly.PREVIOUS_STATEMENT:if(a.isConnected()||this.isConnected())return!1;break;case Blockly.OUTPUT_VALUE:if(a.isConnected()||this.isConnected())return!1;break;case Blockly.INPUT_VALUE:if(a.targetConnection&&!a.targetBlock().isMovable()&&!a.targetBlock().isShadow())return!1;break;case Blockly.NEXT_STATEMENT:if(a.isConnected()&&!this.sourceBlock_.nextConnection&&
-!a.targetBlock().isShadow()&&a.targetBlock().nextConnection)return!1;break;default:throw Error("Unknown connection type in isConnectionAllowed");}return-1!=Blockly.draggingConnections_.indexOf(a)?!1:!0};Blockly.Connection.prototype.connect=function(a){this.targetConnection!=a&&(this.checkConnection_(a),this.isSuperior()?this.connect_(a):a.connect_(this))};
+Blockly.Connection.prototype.canConnectToPrevious_=function(a){if(this.targetConnection||-1!=Blockly.draggingConnections_.indexOf(a))return!1;if(!a.targetConnection)return!0;a=a.targetBlock();return a.isInsertionMarker()?!a.getPreviousBlock():!1};
+Blockly.Connection.prototype.isConnectionAllowed=function(a){if(a.sourceBlock_.isInsertionMarker()||this.canConnectWithReason_(a)!=Blockly.Connection.CAN_CONNECT)return!1;switch(a.type){case Blockly.PREVIOUS_STATEMENT:return this.canConnectToPrevious_(a);case Blockly.OUTPUT_VALUE:if(a.isConnected()||this.isConnected())return!1;break;case Blockly.INPUT_VALUE:if(a.isConnected()&&!a.targetBlock().isMovable()&&!a.targetBlock().isShadow())return!1;break;case Blockly.NEXT_STATEMENT:if(a.isConnected()&&
+!this.sourceBlock_.nextConnection&&!a.targetBlock().isShadow()&&a.targetBlock().nextConnection)return!1;break;default:throw Error("Unknown connection type in isConnectionAllowed");}return-1!=Blockly.draggingConnections_.indexOf(a)?!1:!0};Blockly.Connection.prototype.connect=function(a){this.targetConnection!=a&&(this.checkConnection_(a),this.isSuperior()?this.connect_(a):a.connect_(this))};
 Blockly.Connection.connectReciprocally_=function(a,b){if(!a||!b)throw Error("Cannot connect null connections.");a.targetConnection=b;b.targetConnection=a};Blockly.Connection.singleConnection_=function(a,b){for(var c=!1,d=0;d<a.inputList.length;d++){var e=a.inputList[d].connection;if(e&&e.type==Blockly.INPUT_VALUE&&b.outputConnection.checkType_(e)){if(c)return null;c=e}}return c};
 Blockly.Connection.lastConnectionInRow_=function(a,b){for(var c=a,d;d=Blockly.Connection.singleConnection_(c,b);)if(c=d.targetBlock(),!c||c.isShadow())return d;return null};
 Blockly.Connection.prototype.disconnect=function(){var a=this.targetConnection;if(!a)throw Error("Source connection not connected.");if(a.targetConnection!=this)throw Error("Target connection not connected to source connection.");if(this.isSuperior()){var b=this.sourceBlock_;var c=a.getSourceBlock();a=this}else b=a.getSourceBlock(),c=this.sourceBlock_;this.disconnectInternal_(b,c);a.respawnShadow_()};
@@ -1061,17 +1069,18 @@ Blockly.ConnectionDB.prototype.findConnection=function(a){if(!this.length)return
 Blockly.ConnectionDB.prototype.findPositionForConnection_=function(a){if(!this.length)return 0;for(var b=0,c=this.length;b<c;){var d=Math.floor((b+c)/2);if(this[d].y_<a.y_)b=d+1;else if(this[d].y_>a.y_)c=d;else{b=d;break}}return b};Blockly.ConnectionDB.prototype.removeConnection_=function(a){if(!a.inDB_)throw Error("Connection not in database.");var b=this.findConnection(a);if(-1==b)throw Error("Unable to find connection in connectionDB.");a.inDB_=!1;this.splice(b,1)};
 Blockly.ConnectionDB.prototype.getNeighbours=function(a,b){function c(a){var c=e-d[a].x_,g=f-d[a].y_;Math.sqrt(c*c+g*g)<=b&&l.push(d[a]);return g<b}for(var d=this,e=a.x_,f=a.y_,g=0,h=d.length-2,k=h;g<k;)d[k].y_<f?g=k:h=k,k=Math.floor((g+h)/2);var l=[];h=g=k;if(d.length){for(;0<=g&&c(g);)g--;do h++;while(h<d.length&&c(h))}return l};Blockly.ConnectionDB.prototype.isInYRange_=function(a,b,c){return Math.abs(this[a].y_-b)<=c};
 Blockly.ConnectionDB.prototype.searchForClosest=function(a,b,c){if(!this.length)return{connection:null,radius:b};var d=a.y_,e=a.x_;a.x_=e+c.x;a.y_=d+c.y;var f=this.findPositionForConnection_(a);c=null;for(var g=b,h,k=f-1;0<=k&&this.isInYRange_(k,a.y_,b);)h=this[k],a.isConnectionAllowed(h,g)&&(c=h,g=h.distanceFrom(a)),k--;for(;f<this.length&&this.isInYRange_(f,a.y_,b);)h=this[f],a.isConnectionAllowed(h,g)&&(c=h,g=h.distanceFrom(a)),f++;a.x_=e;a.y_=d;return{connection:c,radius:g}};
-Blockly.ConnectionDB.init=function(a){var b=[];b[Blockly.INPUT_VALUE]=new Blockly.ConnectionDB;b[Blockly.OUTPUT_VALUE]=new Blockly.ConnectionDB;b[Blockly.NEXT_STATEMENT]=new Blockly.ConnectionDB;b[Blockly.PREVIOUS_STATEMENT]=new Blockly.ConnectionDB;a.connectionDBList=b};Blockly.constants={};Blockly.DRAG_RADIUS=5;Blockly.FLYOUT_DRAG_RADIUS=10;Blockly.SNAP_RADIUS=20;Blockly.BUMP_DELAY=250;Blockly.COLLAPSE_CHARS=30;Blockly.LONGPRESS=750;Blockly.SOUND_LIMIT=100;Blockly.DRAG_STACK=!0;Blockly.HSV_SATURATION=.45;Blockly.HSV_VALUE=.65;Blockly.SPRITE={width:96,height:124,url:"sprites.png"};Blockly.SVG_NS="http://www.w3.org/2000/svg";Blockly.HTML_NS="http://www.w3.org/1999/xhtml";Blockly.INPUT_VALUE=1;Blockly.OUTPUT_VALUE=2;Blockly.NEXT_STATEMENT=3;
-Blockly.PREVIOUS_STATEMENT=4;Blockly.DUMMY_INPUT=5;Blockly.ALIGN_LEFT=-1;Blockly.ALIGN_CENTRE=0;Blockly.ALIGN_RIGHT=1;Blockly.DRAG_NONE=0;Blockly.DRAG_STICKY=1;Blockly.DRAG_BEGIN=1;Blockly.DRAG_FREE=2;Blockly.OPPOSITE_TYPE=[];Blockly.OPPOSITE_TYPE[Blockly.INPUT_VALUE]=Blockly.OUTPUT_VALUE;Blockly.OPPOSITE_TYPE[Blockly.OUTPUT_VALUE]=Blockly.INPUT_VALUE;Blockly.OPPOSITE_TYPE[Blockly.NEXT_STATEMENT]=Blockly.PREVIOUS_STATEMENT;Blockly.OPPOSITE_TYPE[Blockly.PREVIOUS_STATEMENT]=Blockly.NEXT_STATEMENT;
-Blockly.TOOLBOX_AT_TOP=0;Blockly.TOOLBOX_AT_BOTTOM=1;Blockly.TOOLBOX_AT_LEFT=2;Blockly.TOOLBOX_AT_RIGHT=3;Blockly.DELETE_AREA_NONE=null;Blockly.DELETE_AREA_TRASH=1;Blockly.DELETE_AREA_TOOLBOX=2;Blockly.VARIABLE_CATEGORY_NAME="VARIABLE";Blockly.VARIABLE_DYNAMIC_CATEGORY_NAME="VARIABLE_DYNAMIC";Blockly.PROCEDURE_CATEGORY_NAME="PROCEDURE";Blockly.RENAME_VARIABLE_ID="RENAME_VARIABLE_ID";Blockly.DELETE_VARIABLE_ID="DELETE_VARIABLE_ID";Blockly.BlockAnimations={};Blockly.BlockAnimations.disconnectPid_=0;Blockly.BlockAnimations.disconnectGroup_=null;Blockly.BlockAnimations.disposeUiEffect=function(a){var b=a.workspace,c=a.getSvgRoot();b.getAudioManager().play("delete");a=b.getSvgXY(c);c=c.cloneNode(!0);c.translateX_=a.x;c.translateY_=a.y;c.setAttribute("transform","translate("+a.x+","+a.y+")");b.getParentSvg().appendChild(c);c.bBox_=c.getBBox();Blockly.BlockAnimations.disposeUiStep_(c,b.RTL,new Date,b.scale)};
+Blockly.ConnectionDB.init=function(a){var b=[];b[Blockly.INPUT_VALUE]=new Blockly.ConnectionDB;b[Blockly.OUTPUT_VALUE]=new Blockly.ConnectionDB;b[Blockly.NEXT_STATEMENT]=new Blockly.ConnectionDB;b[Blockly.PREVIOUS_STATEMENT]=new Blockly.ConnectionDB;a.connectionDBList=b};Blockly.constants={};Blockly.DRAG_RADIUS=5;Blockly.FLYOUT_DRAG_RADIUS=10;Blockly.SNAP_RADIUS=28;Blockly.CONNECTING_SNAP_RADIUS=Blockly.SNAP_RADIUS;Blockly.CURRENT_CONNECTION_PREFERENCE=8;Blockly.INSERTION_MARKER_COLOUR="#000000";Blockly.BUMP_DELAY=250;Blockly.BUMP_RANDOMNESS=10;Blockly.COLLAPSE_CHARS=30;Blockly.LONGPRESS=750;Blockly.SOUND_LIMIT=100;Blockly.DRAG_STACK=!0;Blockly.HSV_SATURATION=.45;Blockly.HSV_VALUE=.65;Blockly.SPRITE={width:96,height:124,url:"sprites.png"};Blockly.SVG_NS="http://www.w3.org/2000/svg";
+Blockly.HTML_NS="http://www.w3.org/1999/xhtml";Blockly.INPUT_VALUE=1;Blockly.OUTPUT_VALUE=2;Blockly.NEXT_STATEMENT=3;Blockly.PREVIOUS_STATEMENT=4;Blockly.DUMMY_INPUT=5;Blockly.ALIGN_LEFT=-1;Blockly.ALIGN_CENTRE=0;Blockly.ALIGN_RIGHT=1;Blockly.DRAG_NONE=0;Blockly.DRAG_STICKY=1;Blockly.DRAG_BEGIN=1;Blockly.DRAG_FREE=2;Blockly.OPPOSITE_TYPE=[];Blockly.OPPOSITE_TYPE[Blockly.INPUT_VALUE]=Blockly.OUTPUT_VALUE;Blockly.OPPOSITE_TYPE[Blockly.OUTPUT_VALUE]=Blockly.INPUT_VALUE;
+Blockly.OPPOSITE_TYPE[Blockly.NEXT_STATEMENT]=Blockly.PREVIOUS_STATEMENT;Blockly.OPPOSITE_TYPE[Blockly.PREVIOUS_STATEMENT]=Blockly.NEXT_STATEMENT;Blockly.TOOLBOX_AT_TOP=0;Blockly.TOOLBOX_AT_BOTTOM=1;Blockly.TOOLBOX_AT_LEFT=2;Blockly.TOOLBOX_AT_RIGHT=3;Blockly.DELETE_AREA_NONE=null;Blockly.DELETE_AREA_TRASH=1;Blockly.DELETE_AREA_TOOLBOX=2;Blockly.VARIABLE_CATEGORY_NAME="VARIABLE";Blockly.VARIABLE_DYNAMIC_CATEGORY_NAME="VARIABLE_DYNAMIC";Blockly.PROCEDURE_CATEGORY_NAME="PROCEDURE";
+Blockly.RENAME_VARIABLE_ID="RENAME_VARIABLE_ID";Blockly.DELETE_VARIABLE_ID="DELETE_VARIABLE_ID";Blockly.BlockAnimations={};Blockly.BlockAnimations.disconnectPid_=0;Blockly.BlockAnimations.disconnectGroup_=null;Blockly.BlockAnimations.disposeUiEffect=function(a){var b=a.workspace,c=a.getSvgRoot();b.getAudioManager().play("delete");a=b.getSvgXY(c);c=c.cloneNode(!0);c.translateX_=a.x;c.translateY_=a.y;c.setAttribute("transform","translate("+a.x+","+a.y+")");b.getParentSvg().appendChild(c);c.bBox_=c.getBBox();Blockly.BlockAnimations.disposeUiStep_(c,b.RTL,new Date,b.scale)};
 Blockly.BlockAnimations.disposeUiStep_=function(a,b,c,d){var e=(new Date-c)/150;1<e?Blockly.utils.removeNode(a):(a.setAttribute("transform","translate("+(a.translateX_+(b?-1:1)*a.bBox_.width*d/2*e)+","+(a.translateY_+a.bBox_.height*d*e)+") scale("+(1-e)*d+")"),setTimeout(Blockly.BlockAnimations.disposeUiStep_,10,a,b,c,d))};
 Blockly.BlockAnimations.connectionUiEffect=function(a){var b=a.workspace,c=b.scale;b.getAudioManager().play("click");if(!(1>c)){var d=b.getSvgXY(a.getSvgRoot());a.outputConnection?(d.x+=(a.RTL?3:-3)*c,d.y+=13*c):a.previousConnection&&(d.x+=(a.RTL?-23:23)*c,d.y+=3*c);a=Blockly.utils.createSvgElement("circle",{cx:d.x,cy:d.y,r:0,fill:"none",stroke:"#888","stroke-width":10},b.getParentSvg());Blockly.BlockAnimations.connectionUiStep_(a,new Date,c)}};
 Blockly.BlockAnimations.connectionUiStep_=function(a,b,c){var d=(new Date-b)/150;1<d?Blockly.utils.removeNode(a):(a.setAttribute("r",25*d*c),a.style.opacity=1-d,Blockly.BlockAnimations.disconnectPid_=setTimeout(Blockly.BlockAnimations.connectionUiStep_,10,a,b,c))};
 Blockly.BlockAnimations.disconnectUiEffect=function(a){a.workspace.getAudioManager().play("disconnect");if(!(1>a.workspace.scale)){var b=a.getHeightWidth().height;b=Math.atan(10/b)/Math.PI*180;a.RTL||(b*=-1);Blockly.BlockAnimations.disconnectUiStep_(a.getSvgRoot(),b,new Date)}};
 Blockly.BlockAnimations.disconnectUiStep_=function(a,b,c){var d=(new Date-c)/200;1<d?a.skew_="":(a.skew_="skewX("+Math.round(Math.sin(d*Math.PI*3)*(1-d)*b)+")",Blockly.BlockAnimations.disconnectGroup_=a,Blockly.BlockAnimations.disconnectPid_=setTimeout(Blockly.BlockAnimations.disconnectUiStep_,10,a,b,c));a.setAttribute("transform",a.translate_+a.skew_)};
 Blockly.BlockAnimations.disconnectUiStop=function(){if(Blockly.BlockAnimations.disconnectGroup_){clearTimeout(Blockly.BlockAnimations.disconnectPid_);var a=Blockly.BlockAnimations.disconnectGroup_;a.skew_="";a.setAttribute("transform",a.translate_);Blockly.BlockAnimations.disconnectGroup_=null}};Blockly.RenderedConnection=function(a,b){Blockly.RenderedConnection.superClass_.constructor.call(this,a,b);this.offsetInBlock_=new goog.math.Coordinate(0,0)};goog.inherits(Blockly.RenderedConnection,Blockly.Connection);Blockly.RenderedConnection.prototype.distanceFrom=function(a){var b=this.x_-a.x_;a=this.y_-a.y_;return Math.sqrt(b*b+a*a)};
-Blockly.RenderedConnection.prototype.bumpAwayFrom_=function(a){if(!this.sourceBlock_.workspace.isDragging()){var b=this.sourceBlock_.getRootBlock();if(!b.isInFlyout){var c=!1;if(!b.isMovable()){b=a.getSourceBlock().getRootBlock();if(!b.isMovable())return;a=this;c=!0}var d=Blockly.selected==b;d||b.addSelect();var e=a.x_+Blockly.SNAP_RADIUS-this.x_;a=a.y_+Blockly.SNAP_RADIUS-this.y_;c&&(a=-a);b.RTL&&(e=-e);b.moveBy(e,a);d||b.removeSelect()}}};
-Blockly.RenderedConnection.prototype.moveTo=function(a,b){this.inDB_&&this.db_.removeConnection_(this);this.x_=a;this.y_=b;this.hidden_||this.db_.addConnection(this)};Blockly.RenderedConnection.prototype.moveBy=function(a,b){this.moveTo(this.x_+a,this.y_+b)};Blockly.RenderedConnection.prototype.moveToOffset=function(a){this.moveTo(a.x+this.offsetInBlock_.x,a.y+this.offsetInBlock_.y)};
+Blockly.RenderedConnection.prototype.bumpAwayFrom_=function(a){if(!this.sourceBlock_.workspace.isDragging()){var b=this.sourceBlock_.getRootBlock();if(!b.isInFlyout){var c=!1;if(!b.isMovable()){b=a.getSourceBlock().getRootBlock();if(!b.isMovable())return;a=this;c=!0}var d=Blockly.selected==b;d||b.addSelect();var e=a.x_+Blockly.SNAP_RADIUS+Math.floor(Math.random()*Blockly.BUMP_RANDOMNESS)-this.x_;a=a.y_+Blockly.SNAP_RADIUS+Math.floor(Math.random()*Blockly.BUMP_RANDOMNESS)-this.y_;c&&(a=-a);b.RTL&&
+(e=-e);b.moveBy(e,a);d||b.removeSelect()}}};Blockly.RenderedConnection.prototype.moveTo=function(a,b){this.inDB_&&this.db_.removeConnection_(this);this.x_=a;this.y_=b;this.hidden_||this.db_.addConnection(this)};Blockly.RenderedConnection.prototype.moveBy=function(a,b){this.moveTo(this.x_+a,this.y_+b)};Blockly.RenderedConnection.prototype.moveToOffset=function(a){this.moveTo(a.x+this.offsetInBlock_.x,a.y+this.offsetInBlock_.y)};
 Blockly.RenderedConnection.prototype.setOffsetInBlock=function(a,b){this.offsetInBlock_.x=a;this.offsetInBlock_.y=b};Blockly.RenderedConnection.prototype.tighten_=function(){var a=this.targetConnection.x_-this.x_,b=this.targetConnection.y_-this.y_;if(0!=a||0!=b){var c=this.targetBlock(),d=c.getSvgRoot();if(!d)throw Error("block is not rendered.");d=Blockly.utils.getRelativeXY(d);c.getSvgRoot().setAttribute("transform","translate("+(d.x-a)+","+(d.y-b)+")");c.moveConnections_(-a,-b)}};
 Blockly.RenderedConnection.prototype.closest=function(a,b){return this.dbOpposite_.searchForClosest(this,a,b)};
 Blockly.RenderedConnection.prototype.highlight=function(){var a=this.type==Blockly.INPUT_VALUE||this.type==Blockly.OUTPUT_VALUE?"m 0,0 "+Blockly.BlockSvg.TAB_PATH_DOWN+" v 5":"m -20,0 h 5 "+Blockly.BlockSvg.NOTCH_PATH_LEFT+" h 5";var b=this.sourceBlock_.getRelativeToSurfaceXY();Blockly.Connection.highlightedPath_=Blockly.utils.createSvgElement("path",{"class":"blocklyHighlightedConnectionPath",d:a,transform:"translate("+(this.x_-b.x)+","+(this.y_-b.y)+")"+(this.sourceBlock_.RTL?" scale(-1 1)":"")},
@@ -1089,11 +1098,11 @@ Blockly.DraggedConnectionManager.prototype.update=function(a,b){var c=this.close
 Blockly.DraggedConnectionManager.prototype.removeHighlighting_=function(){this.closestConnection_&&this.closestConnection_.unhighlight()};Blockly.DraggedConnectionManager.prototype.addHighlighting_=function(){this.closestConnection_&&this.closestConnection_.highlight()};Blockly.DraggedConnectionManager.prototype.initAvailableConnections_=function(){var a=this.topBlock_.getConnections_(!1),b=this.topBlock_.lastConnectionInStack();b&&b!=this.topBlock_.nextConnection&&a.push(b);return a};
 Blockly.DraggedConnectionManager.prototype.updateClosest_=function(a){var b=this.closestConnection_;this.localConnection_=this.closestConnection_=null;this.radiusConnection_=Blockly.SNAP_RADIUS;for(var c=0;c<this.availableConnections_.length;c++){var d=this.availableConnections_[c],e=d.closest(this.radiusConnection_,a);e.connection&&(this.closestConnection_=e.connection,this.localConnection_=d,this.radiusConnection_=e.radius)}return b!=this.closestConnection_};Blockly.BlockDragger=function(a,b){this.draggingBlock_=a;this.workspace_=b;this.draggedConnectionManager_=new Blockly.DraggedConnectionManager(this.draggingBlock_);this.deleteArea_=null;this.wouldDeleteBlock_=!1;this.startXY_=this.draggingBlock_.getRelativeToSurfaceXY();this.dragIconData_=Blockly.BlockDragger.initIconData_(a)};
 Blockly.BlockDragger.prototype.dispose=function(){this.startWorkspace_=this.workspace_=this.draggingBlock_=null;this.dragIconData_.length=0;this.draggedConnectionManager_&&(this.draggedConnectionManager_.dispose(),this.draggedConnectionManager_=null)};Blockly.BlockDragger.initIconData_=function(a){var b=[];a=a.getDescendants(!1);for(var c=0,d;d=a[c];c++){d=d.getIcons();for(var e=0;e<d.length;e++){var f={location:d[e].getIconLocation(),icon:d[e]};b.push(f)}}return b};
-Blockly.BlockDragger.prototype.startBlockDrag=function(a,b){Blockly.Events.getGroup()||Blockly.Events.setGroup(!0);this.workspace_.isMutator&&this.draggingBlock_.bringToFront();this.workspace_.setResizesEnabled(!1);Blockly.BlockAnimations.disconnectUiStop();if(this.draggingBlock_.getParent()||b&&this.draggingBlock_.nextConnection&&this.draggingBlock_.nextConnection.targetBlock()){this.draggingBlock_.unplug(b);var c=this.pixelsToWorkspaceUnits_(a);c=goog.math.Coordinate.sum(this.startXY_,c);this.draggingBlock_.translate(c.x,
-c.y);Blockly.BlockAnimations.disconnectUiEffect(this.draggingBlock_)}this.draggingBlock_.setDragging(!0);this.draggingBlock_.moveToDragSurface_();if(c=this.workspace_.getToolbox()){var d=this.draggingBlock_.isDeletable()?"blocklyToolboxDelete":"blocklyToolboxGrab";c.addStyle(d)}};
+Blockly.BlockDragger.prototype.startBlockDrag=function(a,b){Blockly.Events.getGroup()||Blockly.Events.setGroup(!0);this.workspace_.isMutator&&this.draggingBlock_.bringToFront();Blockly.Field.startCache();this.workspace_.setResizesEnabled(!1);Blockly.BlockAnimations.disconnectUiStop();if(this.draggingBlock_.getParent()||b&&this.draggingBlock_.nextConnection&&this.draggingBlock_.nextConnection.targetBlock()){this.draggingBlock_.unplug(b);var c=this.pixelsToWorkspaceUnits_(a);c=goog.math.Coordinate.sum(this.startXY_,
+c);this.draggingBlock_.translate(c.x,c.y);Blockly.BlockAnimations.disconnectUiEffect(this.draggingBlock_)}this.draggingBlock_.setDragging(!0);this.draggingBlock_.moveToDragSurface_();if(c=this.workspace_.getToolbox()){var d=this.draggingBlock_.isDeletable()?"blocklyToolboxDelete":"blocklyToolboxGrab";c.addStyle(d)}};
 Blockly.BlockDragger.prototype.dragBlock=function(a,b){var c=this.pixelsToWorkspaceUnits_(b),d=goog.math.Coordinate.sum(this.startXY_,c);this.draggingBlock_.moveDuringDrag(d);this.dragIcons_(c);this.deleteArea_=this.workspace_.isDeleteArea(a);this.draggedConnectionManager_.update(c,this.deleteArea_);this.updateCursorDuringBlockDrag_()};
-Blockly.BlockDragger.prototype.endBlockDrag=function(a,b){this.dragBlock(a,b);this.dragIconData_=[];Blockly.BlockAnimations.disconnectUiStop();var c=this.pixelsToWorkspaceUnits_(b),d=goog.math.Coordinate.sum(this.startXY_,c);this.draggingBlock_.moveOffDragSurface_(d);this.maybeDeleteBlock_()||(this.draggingBlock_.moveConnections_(c.x,c.y),this.draggingBlock_.setDragging(!1),this.fireMoveEvent_(),this.draggedConnectionManager_.wouldConnectBlock()?this.draggedConnectionManager_.applyConnections():this.draggingBlock_.render(),
-this.draggingBlock_.scheduleSnapAndBump());this.workspace_.setResizesEnabled(!0);if(c=this.workspace_.getToolbox())d=this.draggingBlock_.isDeletable()?"blocklyToolboxDelete":"blocklyToolboxGrab",c.removeStyle(d);Blockly.Events.setGroup(!1)};Blockly.BlockDragger.prototype.fireMoveEvent_=function(){var a=new Blockly.Events.BlockMove(this.draggingBlock_);a.oldCoordinate=this.startXY_;a.recordNew();Blockly.Events.fire(a)};
+Blockly.BlockDragger.prototype.endBlockDrag=function(a,b){this.dragBlock(a,b);this.dragIconData_=[];Blockly.Field.stopCache();Blockly.BlockAnimations.disconnectUiStop();var c=this.pixelsToWorkspaceUnits_(b),d=goog.math.Coordinate.sum(this.startXY_,c);this.draggingBlock_.moveOffDragSurface_(d);this.maybeDeleteBlock_()||(this.draggingBlock_.moveConnections_(c.x,c.y),this.draggingBlock_.setDragging(!1),this.fireMoveEvent_(),this.draggedConnectionManager_.wouldConnectBlock()?this.draggedConnectionManager_.applyConnections():
+this.draggingBlock_.render(),this.draggingBlock_.scheduleSnapAndBump());this.workspace_.setResizesEnabled(!0);if(c=this.workspace_.getToolbox())d=this.draggingBlock_.isDeletable()?"blocklyToolboxDelete":"blocklyToolboxGrab",c.removeStyle(d);Blockly.Events.setGroup(!1)};Blockly.BlockDragger.prototype.fireMoveEvent_=function(){var a=new Blockly.Events.BlockMove(this.draggingBlock_);a.oldCoordinate=this.startXY_;a.recordNew();Blockly.Events.fire(a)};
 Blockly.BlockDragger.prototype.maybeDeleteBlock_=function(){var a=this.workspace_.trashcan;this.wouldDeleteBlock_?(a&&setTimeout(a.close.bind(a),100),this.fireMoveEvent_(),this.draggingBlock_.dispose(!1,!0)):a&&a.close();return this.wouldDeleteBlock_};
 Blockly.BlockDragger.prototype.updateCursorDuringBlockDrag_=function(){this.wouldDeleteBlock_=this.draggedConnectionManager_.wouldDeleteBlock();var a=this.workspace_.trashcan;this.wouldDeleteBlock_?(this.draggingBlock_.setDeleteStyle(!0),this.deleteArea_==Blockly.DELETE_AREA_TRASH&&a&&a.setOpen_(!0)):(this.draggingBlock_.setDeleteStyle(!1),a&&a.setOpen_(!1))};
 Blockly.BlockDragger.prototype.pixelsToWorkspaceUnits_=function(a){a=new goog.math.Coordinate(a.x/this.workspace_.scale,a.y/this.workspace_.scale);this.workspace_.isMutator&&(a=a.scale(1/this.workspace_.options.parentWorkspace.scale));return a};Blockly.BlockDragger.prototype.dragIcons_=function(a){for(var b=0;b<this.dragIconData_.length;b++){var c=this.dragIconData_[b];c.icon.setIconLocation(goog.math.Coordinate.sum(c.location,a))}};Blockly.WorkspaceCommentSvg=function(a,b,c,d,e){this.svgGroup_=Blockly.utils.createSvgElement("g",{"class":"blocklyComment"},null);this.svgGroup_.translate_="";this.svgRect_=Blockly.utils.createSvgElement("rect",{"class":"blocklyCommentRect",x:0,y:0,rx:Blockly.WorkspaceCommentSvg.BORDER_RADIUS,ry:Blockly.WorkspaceCommentSvg.BORDER_RADIUS});this.svgGroup_.appendChild(this.svgRect_);this.rendered_=!1;this.useDragSurface_=Blockly.utils.is3dSupported()&&!!a.blockDragSurface_;Blockly.WorkspaceCommentSvg.superClass_.constructor.call(this,
@@ -1159,8 +1168,8 @@ Blockly.Gesture.prototype.isWorkspaceClick_=function(){return!this.startBlock_&&
 Blockly.Grid.prototype.update=function(a){this.scale_=a;var b=this.spacing_*a||100;this.gridPattern_.setAttribute("width",b);this.gridPattern_.setAttribute("height",b);b=Math.floor(this.spacing_/2)+.5;var c=b-this.length_/2,d=b+this.length_/2;b*=a;c*=a;d*=a;this.setLineAttributes_(this.line1_,a,c,d,b,b);this.setLineAttributes_(this.line2_,a,b,b,c,d)};
 Blockly.Grid.prototype.setLineAttributes_=function(a,b,c,d,e,f){a&&(a.setAttribute("stroke-width",b),a.setAttribute("x1",c),a.setAttribute("y1",e),a.setAttribute("x2",d),a.setAttribute("y2",f))};Blockly.Grid.prototype.moveTo=function(a,b){this.gridPattern_.setAttribute("x",a);this.gridPattern_.setAttribute("y",b);(goog.userAgent.IE||goog.userAgent.EDGE)&&this.update(this.scale_)};
 Blockly.Grid.createDom=function(a,b,c){a=Blockly.utils.createSvgElement("pattern",{id:"blocklyGridPattern"+a,patternUnits:"userSpaceOnUse"},c);0<b.length&&0<b.spacing?(Blockly.utils.createSvgElement("line",{stroke:b.colour},a),1<b.length&&Blockly.utils.createSvgElement("line",{stroke:b.colour},a)):Blockly.utils.createSvgElement("line",{},a);return a};Blockly.Options=function(a){var b=!!a.readOnly;if(b)var c=null,d=!1,e=!1,f=!1,g=!1,h=!1,k=!1;else c=Blockly.Options.parseToolboxTree(a.toolbox),d=!(!c||!c.getElementsByTagName("category").length),e=a.trashcan,void 0===e&&(e=d),f=a.collapse,void 0===f&&(f=d),g=a.comments,void 0===g&&(g=d),h=a.disable,void 0===h&&(h=d),k=a.sounds,void 0===k&&(k=!0);var l=!!a.rtl,n=a.horizontalLayout;void 0===n&&(n=!1);var m=a.toolboxPosition;m="end"===m?!1:!0;m=n?m?Blockly.TOOLBOX_AT_TOP:Blockly.TOOLBOX_AT_BOTTOM:m==
-l?Blockly.TOOLBOX_AT_RIGHT:Blockly.TOOLBOX_AT_LEFT;var p=a.scrollbars;void 0===p&&(p=d);var q=a.css;void 0===q&&(q=!0);var t="https://blockly-demo.appspot.com/static/media/";a.media?t=a.media:a.path&&(t=a.path+"media/");var r=void 0===a.oneBasedIndex?!0:!!a.oneBasedIndex;this.RTL=l;this.oneBasedIndex=r;this.collapse=f;this.comments=g;this.disable=h;this.readOnly=b;this.maxBlocks=a.maxBlocks||Infinity;this.pathToMedia=t;this.hasCategories=d;this.hasScrollbars=p;this.hasTrashcan=e;this.hasSounds=k;
-this.hasCss=q;this.horizontalLayout=n;this.languageTree=c;this.gridOptions=Blockly.Options.parseGridOptions_(a);this.zoomOptions=Blockly.Options.parseZoomOptions_(a);this.toolboxPosition=m};Blockly.Options.prototype.parentWorkspace=null;Blockly.Options.prototype.setMetrics=null;Blockly.Options.prototype.getMetrics=null;
+l?Blockly.TOOLBOX_AT_RIGHT:Blockly.TOOLBOX_AT_LEFT;var p=a.scrollbars;void 0===p&&(p=d);var q=a.css;void 0===q&&(q=!0);var r="https://blockly-demo.appspot.com/static/media/";a.media?r=a.media:a.path&&(r=a.path+"media/");var t=void 0===a.oneBasedIndex?!0:!!a.oneBasedIndex;this.RTL=l;this.oneBasedIndex=t;this.collapse=f;this.comments=g;this.disable=h;this.readOnly=b;this.maxBlocks=a.maxBlocks||Infinity;this.maxInstances=a.maxInstances;this.pathToMedia=r;this.hasCategories=d;this.hasScrollbars=p;this.hasTrashcan=
+e;this.hasSounds=k;this.hasCss=q;this.horizontalLayout=n;this.languageTree=c;this.gridOptions=Blockly.Options.parseGridOptions_(a);this.zoomOptions=Blockly.Options.parseZoomOptions_(a);this.toolboxPosition=m};Blockly.Options.prototype.parentWorkspace=null;Blockly.Options.prototype.setMetrics=null;Blockly.Options.prototype.getMetrics=null;
 Blockly.Options.parseZoomOptions_=function(a){a=a.zoom||{};var b={};b.controls=void 0===a.controls?!1:!!a.controls;b.wheel=void 0===a.wheel?!1:!!a.wheel;b.startScale=void 0===a.startScale?1:parseFloat(a.startScale);b.maxScale=void 0===a.maxScale?3:parseFloat(a.maxScale);b.minScale=void 0===a.minScale?.3:parseFloat(a.minScale);b.scaleSpeed=void 0===a.scaleSpeed?1.2:parseFloat(a.scaleSpeed);return b};
 Blockly.Options.parseGridOptions_=function(a){a=a.grid||{};var b={};b.spacing=parseFloat(a.spacing)||0;b.colour=a.colour||"#888";b.length=parseFloat(a.length)||1;b.snap=0<b.spacing&&!!a.snap;return b};Blockly.Options.parseToolboxTree=function(a){a?("string"!=typeof a&&("undefined"==typeof XSLTProcessor&&a.outerHTML?a=a.outerHTML:a instanceof Element||(a=null)),"string"==typeof a&&(a=Blockly.Xml.textToDom(a))):a=null;return a};Blockly.ScrollbarPair=function(a){this.workspace_=a;this.hScroll=new Blockly.Scrollbar(a,!0,!0,"blocklyMainWorkspaceScrollbar");this.vScroll=new Blockly.Scrollbar(a,!1,!0,"blocklyMainWorkspaceScrollbar");this.corner_=Blockly.utils.createSvgElement("rect",{height:Blockly.Scrollbar.scrollbarThickness,width:Blockly.Scrollbar.scrollbarThickness,"class":"blocklyScrollbarBackground"},null);Blockly.utils.insertAfter(this.corner_,a.getBubbleCanvas())};Blockly.ScrollbarPair.prototype.oldHostMetrics_=null;
 Blockly.ScrollbarPair.prototype.dispose=function(){Blockly.utils.removeNode(this.corner_);this.oldHostMetrics_=this.workspace_=this.corner_=null;this.hScroll.dispose();this.hScroll=null;this.vScroll.dispose();this.vScroll=null};
@@ -1217,13 +1226,13 @@ Blockly.Variables.renameVariable=function(a,b,c){var d=function(e){var f=Blockly
 Blockly.Variables.promptName=function(a,b,c){Blockly.prompt(a,b,function(a){a&&(a=a.replace(/[\s\xa0]+/g," ").replace(/^ | $/g,""),a==Blockly.Msg.RENAME_VARIABLE||a==Blockly.Msg.NEW_VARIABLE)&&(a=null);c(a)})};Blockly.Variables.nameUsedWithOtherType_=function(a,b,c){c=c.getVariableMap().getAllVariables();a=a.toLowerCase();for(var d=0,e;e=c[d];d++)if(e.name.toLowerCase()==a&&e.type!=b)return e;return null};
 Blockly.Variables.nameUsedWithAnyType_=function(a,b){var c=b.getVariableMap().getAllVariables();a=a.toLowerCase();for(var d=0,e;e=c[d];d++)if(e.name.toLowerCase()==a)return e;return null};Blockly.Variables.generateVariableFieldXmlString=function(a){var b=a.type;""==b&&(b="''");return'<field name="VAR" id="'+a.getId()+'" variabletype="'+goog.string.htmlEscape(b)+'">'+goog.string.htmlEscape(a.name)+"</field>"};
 Blockly.Variables.generateVariableFieldDom=function(a){a=Blockly.Variables.generateVariableFieldXmlString(a);return Blockly.Xml.textToDom("<xml>"+a+"</xml>").firstChild};Blockly.Variables.getOrCreateVariablePackage=function(a,b,c,d){var e=Blockly.Variables.getVariable(a,b,c,d);e||(e=Blockly.Variables.createVariable_(a,b,c,d));return e};
-Blockly.Variables.getVariable=function(a,b,c,d){var e=a.getPotentialVariableMap();if(b){var f=a.getVariableById(b);!f&&e&&(f=e.getVariableById(b))}else if(c){if(void 0==d)throw Error("Tried to look up a variable by name without a type");f=a.getVariable(c,d);!f&&e&&(f=e.getVariable(c,d))}return f};
+Blockly.Variables.getVariable=function(a,b,c,d){var e=a.getPotentialVariableMap();if(b){var f=a.getVariableById(b);!f&&e&&(f=e.getVariableById(b));if(f)return f}if(c){if(void 0==d)throw Error("Tried to look up a variable by name without a type");f=a.getVariable(c,d);!f&&e&&(f=e.getVariable(c,d))}return f};
 Blockly.Variables.createVariable_=function(a,b,c,d){var e=a.getPotentialVariableMap();c||(c=Blockly.Variables.generateUniqueName(a.isFlyout?a.targetWorkspace:a));return e?e.createVariable(c,d,b):a.createVariable(c,d,b)};Blockly.Variables.getAddedVariables=function(a,b){var c=a.getAllVariables(),d=[];if(b.length!=c.length)for(var e=0;e<c.length;e++){var f=c[e];-1==b.indexOf(f)&&d.push(f)}return d};Blockly.VariablesDynamic={};Blockly.VariablesDynamic.onCreateVariableButtonClick_String=function(a){Blockly.Variables.createVariableButtonHandler(a.getTargetWorkspace(),null,"String")};Blockly.VariablesDynamic.onCreateVariableButtonClick_Number=function(a){Blockly.Variables.createVariableButtonHandler(a.getTargetWorkspace(),null,"Number")};Blockly.VariablesDynamic.onCreateVariableButtonClick_Colour=function(a){Blockly.Variables.createVariableButtonHandler(a.getTargetWorkspace(),null,"Colour")};
 Blockly.VariablesDynamic.flyoutCategory=function(a){var b=[],c=document.createElement("button");c.setAttribute("text",Blockly.Msg.NEW_STRING_VARIABLE);c.setAttribute("callbackKey","CREATE_VARIABLE_STRING");b.push(c);c=document.createElement("button");c.setAttribute("text",Blockly.Msg.NEW_NUMBER_VARIABLE);c.setAttribute("callbackKey","CREATE_VARIABLE_NUMBER");b.push(c);c=document.createElement("button");c.setAttribute("text",Blockly.Msg.NEW_COLOUR_VARIABLE);c.setAttribute("callbackKey","CREATE_VARIABLE_COLOUR");
 b.push(c);a.registerButtonCallback("CREATE_VARIABLE_STRING",Blockly.VariablesDynamic.onCreateVariableButtonClick_String);a.registerButtonCallback("CREATE_VARIABLE_NUMBER",Blockly.VariablesDynamic.onCreateVariableButtonClick_Number);a.registerButtonCallback("CREATE_VARIABLE_COLOUR",Blockly.VariablesDynamic.onCreateVariableButtonClick_Colour);a=Blockly.VariablesDynamic.flyoutCategoryBlocks(a);return b=b.concat(a)};
 Blockly.VariablesDynamic.flyoutCategoryBlocks=function(a){a=a.getAllVariables();a.sort(Blockly.VariableModel.compareByName);var b=[];if(0<a.length){if(Blockly.Blocks.variables_set_dynamic){var c='<xml><block type="variables_set_dynamic" gap="24">'+Blockly.Variables.generateVariableFieldXmlString(a[0])+"</block></xml>";c=Blockly.Xml.textToDom(c).firstChild;b.push(c)}if(Blockly.Blocks.variables_get_dynamic)for(var d=0;c=a[d];d++)c='<xml><block type="variables_get_dynamic" gap="8">'+Blockly.Variables.generateVariableFieldXmlString(c)+
 "</block></xml>",c=Blockly.Xml.textToDom(c).firstChild,b.push(c)}return b};Blockly.WorkspaceAudio=function(a){this.parentWorkspace_=a;this.SOUNDS_=Object.create(null)};Blockly.WorkspaceAudio.prototype.lastSound_=null;Blockly.WorkspaceAudio.prototype.dispose=function(){this.SOUNDS_=this.parentWorkspace_=null};Blockly.WorkspaceAudio.prototype.load=function(a,b){if(a.length){try{var c=new window.Audio}catch(h){return}for(var d,e=0;e<a.length;e++){var f=a[e],g=f.match(/\.(\w+)$/);if(g&&c.canPlayType("audio/"+g[1])){d=new window.Audio(f);break}}d&&d.play&&(this.SOUNDS_[b]=d)}};
-Blockly.WorkspaceAudio.prototype.preload=function(){for(var a in this.SOUNDS_){var b=this.SOUNDS_[a];b.volume=.01;b.play();b.pause();if(goog.userAgent.IPAD||goog.userAgent.IPHONE)break}};
+Blockly.WorkspaceAudio.prototype.preload=function(){for(var a in this.SOUNDS_){var b=this.SOUNDS_[a];b.volume=.01;b.play()["catch"](function(){});b.pause();if(goog.userAgent.IPAD||goog.userAgent.IPHONE)break}};
 Blockly.WorkspaceAudio.prototype.play=function(a,b){var c=this.SOUNDS_[a];if(c){var d=new Date;null!=this.lastSound_&&d-this.lastSound_<Blockly.SOUND_LIMIT||(this.lastSound_=d,c=goog.userAgent.DOCUMENT_MODE&&9===goog.userAgent.DOCUMENT_MODE||goog.userAgent.IPAD||goog.userAgent.ANDROID?c:c.cloneNode(),c.volume=void 0===b?1:b,c.play())}else this.parentWorkspace_&&this.parentWorkspace_.getAudioManager().play(a,b)};Blockly.WorkspaceCommentSvg.render={};Blockly.WorkspaceCommentSvg.RESIZE_SIZE=8;Blockly.WorkspaceCommentSvg.BORDER_RADIUS=3;Blockly.WorkspaceCommentSvg.TEXTAREA_OFFSET=2;Blockly.WorkspaceCommentSvg.TOP_OFFSET=10;Blockly.WorkspaceCommentSvg.prototype.getHeightWidth=function(){return{width:this.getWidth(),height:this.getHeight()}};
 Blockly.WorkspaceCommentSvg.prototype.render=function(){if(!this.rendered_){var a=this.getHeightWidth();this.createEditor_();this.svgGroup_.appendChild(this.foreignObject_);this.svgHandleTarget_=Blockly.utils.createSvgElement("rect",{"class":"blocklyCommentHandleTarget",x:0,y:0});this.svgGroup_.appendChild(this.svgHandleTarget_);this.svgRectTarget_=Blockly.utils.createSvgElement("rect",{"class":"blocklyCommentTarget",x:0,y:0,rx:Blockly.WorkspaceCommentSvg.BORDER_RADIUS,ry:Blockly.WorkspaceCommentSvg.BORDER_RADIUS});
 this.svgGroup_.appendChild(this.svgRectTarget_);this.addResizeDom_();this.isDeletable()&&this.addDeleteDom_();this.setSize_(a.width,a.height);this.textarea_.value=this.content_;this.rendered_=!0;this.resizeGroup_&&Blockly.bindEventWithChecks_(this.resizeGroup_,"mousedown",this,this.resizeMouseDown_);this.isDeletable()&&(Blockly.bindEventWithChecks_(this.deleteGroup_,"mousedown",this,this.deleteMouseDown_),Blockly.bindEventWithChecks_(this.deleteGroup_,"mouseout",this,this.deleteMouseOut_),Blockly.bindEventWithChecks_(this.deleteGroup_,
@@ -1241,8 +1250,8 @@ Blockly.WorkspaceCommentSvg.prototype.resizeMouseMove_=function(a){this.autoLayo
 Blockly.WorkspaceCommentSvg.prototype.resizeComment_=function(){var a=this.getHeightWidth(),b=Blockly.WorkspaceCommentSvg.TOP_OFFSET,c=2*Blockly.WorkspaceCommentSvg.TEXTAREA_OFFSET;this.foreignObject_.setAttribute("width",a.width);this.foreignObject_.setAttribute("height",a.height-b);this.RTL&&this.foreignObject_.setAttribute("x",-a.width);this.textarea_.style.width=a.width-c+"px";this.textarea_.style.height=a.height-c-b+"px"};
 Blockly.WorkspaceCommentSvg.prototype.setSize_=function(a,b){a=Math.max(a,45);b=Math.max(b,20+Blockly.WorkspaceCommentSvg.TOP_OFFSET);this.width_=a;this.height_=b;this.svgRect_.setAttribute("width",a);this.svgRect_.setAttribute("height",b);this.svgRectTarget_.setAttribute("width",a);this.svgRectTarget_.setAttribute("height",b);this.svgHandleTarget_.setAttribute("width",a);this.svgHandleTarget_.setAttribute("height",Blockly.WorkspaceCommentSvg.TOP_OFFSET);this.RTL&&(this.svgRect_.setAttribute("transform",
 "scale(-1 1)"),this.svgRectTarget_.setAttribute("transform","scale(-1 1)"));var c=Blockly.WorkspaceCommentSvg.RESIZE_SIZE;this.resizeGroup_&&(this.RTL?(this.resizeGroup_.setAttribute("transform","translate("+(-a+c)+","+(b-c)+") scale(-1 1)"),this.deleteGroup_.setAttribute("transform","translate("+(-a+c)+","+-c+") scale(-1 1)")):(this.resizeGroup_.setAttribute("transform","translate("+(a-c)+","+(b-c)+")"),this.deleteGroup_.setAttribute("transform","translate("+(a-c)+","+-c+")")));this.resizeComment_()};
-Blockly.WorkspaceCommentSvg.prototype.disposeInternal_=function(){this.svgHandleTarget_=this.svgRectTarget_=this.foreignObject_=this.textarea_=null};Blockly.WorkspaceCommentSvg.prototype.setFocus=function(){var a=this;this.focused_=!0;setTimeout(function(){a.textarea_.focus();a.addFocus();Blockly.utils.addClass(a.svgRectTarget_,"blocklyCommentTargetFocused");Blockly.utils.addClass(a.svgHandleTarget_,"blocklyCommentHandleTargetFocused")},0)};
-Blockly.WorkspaceCommentSvg.prototype.blurFocus=function(){var a=this;this.focused_=!1;setTimeout(function(){a.textarea_.blur();a.removeFocus();Blockly.utils.removeClass(a.svgRectTarget_,"blocklyCommentTargetFocused");Blockly.utils.removeClass(a.svgHandleTarget_,"blocklyCommentHandleTargetFocused")},0)};Blockly.WorkspaceDragSurfaceSvg=function(a){this.container_=a;this.createDom()};Blockly.WorkspaceDragSurfaceSvg.prototype.SVG_=null;Blockly.WorkspaceDragSurfaceSvg.prototype.dragGroup_=null;Blockly.WorkspaceDragSurfaceSvg.prototype.container_=null;
+Blockly.WorkspaceCommentSvg.prototype.disposeInternal_=function(){this.svgHandleTarget_=this.svgRectTarget_=this.foreignObject_=this.textarea_=null;this.disposed_=!0};Blockly.WorkspaceCommentSvg.prototype.setFocus=function(){var a=this;this.focused_=!0;setTimeout(function(){a.disposed_||(a.textarea_.focus(),a.addFocus(),Blockly.utils.addClass(a.svgRectTarget_,"blocklyCommentTargetFocused"),Blockly.utils.addClass(a.svgHandleTarget_,"blocklyCommentHandleTargetFocused"))},0)};
+Blockly.WorkspaceCommentSvg.prototype.blurFocus=function(){var a=this;this.focused_=!1;setTimeout(function(){a.disposed_||(a.textarea_.blur(),a.removeFocus(),Blockly.utils.removeClass(a.svgRectTarget_,"blocklyCommentTargetFocused"),Blockly.utils.removeClass(a.svgHandleTarget_,"blocklyCommentHandleTargetFocused"))},0)};Blockly.WorkspaceDragSurfaceSvg=function(a){this.container_=a;this.createDom()};Blockly.WorkspaceDragSurfaceSvg.prototype.SVG_=null;Blockly.WorkspaceDragSurfaceSvg.prototype.dragGroup_=null;Blockly.WorkspaceDragSurfaceSvg.prototype.container_=null;
 Blockly.WorkspaceDragSurfaceSvg.prototype.createDom=function(){this.SVG_||(this.SVG_=Blockly.utils.createSvgElement("svg",{xmlns:Blockly.SVG_NS,"xmlns:html":Blockly.HTML_NS,"xmlns:xlink":"http://www.w3.org/1999/xlink",version:"1.1","class":"blocklyWsDragSurface blocklyOverflowVisible"},null),this.container_.appendChild(this.SVG_))};
 Blockly.WorkspaceDragSurfaceSvg.prototype.translateSurface=function(a,b){var c=a.toFixed(0),d=b.toFixed(0);this.SVG_.style.display="block";Blockly.utils.setCssTransform(this.SVG_,"translate3d("+c+"px, "+d+"px, 0px)")};Blockly.WorkspaceDragSurfaceSvg.prototype.getSurfaceTranslation=function(){return Blockly.utils.getRelativeXY(this.SVG_)};
 Blockly.WorkspaceDragSurfaceSvg.prototype.clearAndHide=function(a){if(!a)throw Error("Couldn't clear and hide the drag surface: missing new surface.");var b=this.SVG_.childNodes[0],c=this.SVG_.childNodes[1];if(!(b&&c&&Blockly.utils.hasClass(b,"blocklyBlockCanvas")&&Blockly.utils.hasClass(c,"blocklyBubbleCanvas")))throw Error("Couldn't clear and hide the drag surface. A node was missing.");null!=this.previousSibling_?Blockly.utils.insertAfter(b,this.previousSibling_):a.insertBefore(b,a.firstChild);
@@ -1253,12 +1262,12 @@ Blockly.ZoomControls.prototype.createDom=function(){this.svgGroup_=Blockly.utils
 Blockly.ZoomControls.prototype.dispose=function(){this.svgGroup_&&(Blockly.utils.removeNode(this.svgGroup_),this.svgGroup_=null);this.workspace_=null};
 Blockly.ZoomControls.prototype.position=function(){var a=this.workspace_.getMetrics();a&&(this.workspace_.RTL?(this.left_=this.MARGIN_SIDE_+Blockly.Scrollbar.scrollbarThickness,a.toolboxPosition==Blockly.TOOLBOX_AT_LEFT&&(this.left_+=a.flyoutWidth,this.workspace_.toolbox_&&(this.left_+=a.absoluteLeft))):(this.left_=a.viewWidth+a.absoluteLeft-this.WIDTH_-this.MARGIN_SIDE_-Blockly.Scrollbar.scrollbarThickness,a.toolboxPosition==Blockly.TOOLBOX_AT_RIGHT&&(this.left_-=a.flyoutWidth)),this.top_=a.viewHeight+
 a.absoluteTop-this.HEIGHT_-this.bottom_,a.toolboxPosition==Blockly.TOOLBOX_AT_BOTTOM&&(this.top_-=a.flyoutHeight),this.svgGroup_.setAttribute("transform","translate("+this.left_+","+this.top_+")"))};
-Blockly.ZoomControls.prototype.createZoomOutSvg_=function(a){var b=this.workspace_,c=Blockly.utils.createSvgElement("clipPath",{id:"blocklyZoomoutClipPath"+a},this.svgGroup_);Blockly.utils.createSvgElement("rect",{width:32,height:32,y:77},c);a=Blockly.utils.createSvgElement("image",{width:Blockly.SPRITE.width,height:Blockly.SPRITE.height,x:-64,y:-15,"clip-path":"url(#blocklyZoomoutClipPath"+a+")"},this.svgGroup_);a.setAttributeNS("http://www.w3.org/1999/xlink","xlink:href",b.options.pathToMedia+Blockly.SPRITE.url);
-Blockly.bindEventWithChecks_(a,"mousedown",null,function(a){b.markFocused();b.zoomCenter(-1);Blockly.Touch.clearTouchIdentifier();a.stopPropagation();a.preventDefault()})};
-Blockly.ZoomControls.prototype.createZoomInSvg_=function(a){var b=this.workspace_,c=Blockly.utils.createSvgElement("clipPath",{id:"blocklyZoominClipPath"+a},this.svgGroup_);Blockly.utils.createSvgElement("rect",{width:32,height:32,y:43},c);a=Blockly.utils.createSvgElement("image",{width:Blockly.SPRITE.width,height:Blockly.SPRITE.height,x:-32,y:-49,"clip-path":"url(#blocklyZoominClipPath"+a+")"},this.svgGroup_);a.setAttributeNS("http://www.w3.org/1999/xlink","xlink:href",b.options.pathToMedia+Blockly.SPRITE.url);
-Blockly.bindEventWithChecks_(a,"mousedown",null,function(a){b.markFocused();b.zoomCenter(1);Blockly.Touch.clearTouchIdentifier();a.stopPropagation();a.preventDefault()})};
-Blockly.ZoomControls.prototype.createZoomResetSvg_=function(a){var b=this.workspace_,c=Blockly.utils.createSvgElement("clipPath",{id:"blocklyZoomresetClipPath"+a},this.svgGroup_);Blockly.utils.createSvgElement("rect",{width:32,height:32},c);a=Blockly.utils.createSvgElement("image",{width:Blockly.SPRITE.width,height:Blockly.SPRITE.height,y:-92,"clip-path":"url(#blocklyZoomresetClipPath"+a+")"},this.svgGroup_);a.setAttributeNS("http://www.w3.org/1999/xlink","xlink:href",b.options.pathToMedia+Blockly.SPRITE.url);
-Blockly.bindEventWithChecks_(a,"mousedown",null,function(a){b.markFocused();b.setScale(b.options.zoomOptions.startScale);b.beginCanvasTransition();b.scrollCenter();setTimeout(function(){b.endCanvasTransition()},500);Blockly.Touch.clearTouchIdentifier();a.stopPropagation();a.preventDefault()})};
+Blockly.ZoomControls.prototype.createZoomOutSvg_=function(a){var b=this.workspace_,c=Blockly.utils.createSvgElement("svg",{id:"svg"+a},this.svgGroup_),d=Blockly.utils.createSvgElement("clipPath",{id:"blocklyZoomoutClipPath"+a},c);Blockly.utils.createSvgElement("rect",{width:32,height:32,y:77},d);a=Blockly.utils.createSvgElement("image",{width:Blockly.SPRITE.width,height:Blockly.SPRITE.height,x:-64,y:-15,"clip-path":"url(#blocklyZoomoutClipPath"+a+")"},c);a.setAttributeNS("http://www.w3.org/1999/xlink",
+"xlink:href",b.options.pathToMedia+Blockly.SPRITE.url);Blockly.bindEventWithChecks_(a,"mousedown",null,function(a){b.markFocused();b.zoomCenter(-1);Blockly.Touch.clearTouchIdentifier();a.stopPropagation();a.preventDefault()})};
+Blockly.ZoomControls.prototype.createZoomInSvg_=function(a){var b=this.workspace_,c=Blockly.utils.createSvgElement("svg",{id:"svg"+a},this.svgGroup_),d=Blockly.utils.createSvgElement("clipPath",{id:"blocklyZoominClipPath"+a},c);Blockly.utils.createSvgElement("rect",{width:32,height:32,y:43},d);a=Blockly.utils.createSvgElement("image",{width:Blockly.SPRITE.width,height:Blockly.SPRITE.height,x:-32,y:-49,"clip-path":"url(#blocklyZoominClipPath"+a+")"},c);a.setAttributeNS("http://www.w3.org/1999/xlink",
+"xlink:href",b.options.pathToMedia+Blockly.SPRITE.url);Blockly.bindEventWithChecks_(a,"mousedown",null,function(a){b.markFocused();b.zoomCenter(1);Blockly.Touch.clearTouchIdentifier();a.stopPropagation();a.preventDefault()})};
+Blockly.ZoomControls.prototype.createZoomResetSvg_=function(a){var b=this.workspace_,c=Blockly.utils.createSvgElement("svg",{id:"svg"+a},this.svgGroup_),d=Blockly.utils.createSvgElement("clipPath",{id:"blocklyZoomresetClipPath"+a},c);Blockly.utils.createSvgElement("rect",{width:32,height:32},d);a=Blockly.utils.createSvgElement("image",{width:Blockly.SPRITE.width,height:Blockly.SPRITE.height,y:-92,"clip-path":"url(#blocklyZoomresetClipPath"+a+")"},c);a.setAttributeNS("http://www.w3.org/1999/xlink",
+"xlink:href",b.options.pathToMedia+Blockly.SPRITE.url);Blockly.bindEventWithChecks_(a,"mousedown",null,function(a){b.markFocused();b.setScale(b.options.zoomOptions.startScale);b.beginCanvasTransition();b.scrollCenter();setTimeout(function(){b.endCanvasTransition()},500);Blockly.Touch.clearTouchIdentifier();a.stopPropagation();a.preventDefault()})};
 Blockly.WorkspaceSvg=function(a,b,c){Blockly.WorkspaceSvg.superClass_.constructor.call(this,a);this.getMetrics=a.getMetrics||Blockly.WorkspaceSvg.getTopLevelWorkspaceMetrics_;this.setMetrics=a.setMetrics||Blockly.WorkspaceSvg.setTopLevelWorkspaceMetrics_;Blockly.ConnectionDB.init(this);b&&(this.blockDragSurface_=b);c&&(this.workspaceDragSurface_=c);this.useWorkspaceDragSurface_=this.workspaceDragSurface_&&Blockly.utils.is3dSupported();this.highlightedBlocks_=[];this.audioManager_=new Blockly.WorkspaceAudio(a.parentWorkspace);
 this.grid_=this.options.gridPattern?new Blockly.Grid(a.gridPattern,a.gridOptions):null;Blockly.Variables&&Blockly.Variables.flyoutCategory&&this.registerToolboxCategoryCallback(Blockly.VARIABLE_CATEGORY_NAME,Blockly.Variables.flyoutCategory);Blockly.VariablesDynamic&&Blockly.VariablesDynamic.flyoutCategory&&this.registerToolboxCategoryCallback(Blockly.VARIABLE_DYNAMIC_CATEGORY_NAME,Blockly.VariablesDynamic.flyoutCategory);Blockly.Procedures&&Blockly.Procedures.flyoutCategory&&this.registerToolboxCategoryCallback(Blockly.PROCEDURE_CATEGORY_NAME,
 Blockly.Procedures.flyoutCategory)};goog.inherits(Blockly.WorkspaceSvg,Blockly.Workspace);Blockly.WorkspaceSvg.prototype.resizeHandlerWrapper_=null;Blockly.WorkspaceSvg.prototype.rendered=!0;Blockly.WorkspaceSvg.prototype.isVisible_=!0;Blockly.WorkspaceSvg.prototype.isFlyout=!1;Blockly.WorkspaceSvg.prototype.isMutator=!1;Blockly.WorkspaceSvg.prototype.resizesEnabled_=!0;Blockly.WorkspaceSvg.prototype.scrollX=0;Blockly.WorkspaceSvg.prototype.scrollY=0;Blockly.WorkspaceSvg.prototype.startScrollX=0;
@@ -1294,7 +1303,7 @@ Blockly.WorkspaceSvg.prototype.isDeleteArea=function(a){a=new goog.math.Coordina
 Blockly.WorkspaceSvg.prototype.startDrag=function(a,b){var c=Blockly.utils.mouseToSvg(a,this.getParentSvg(),this.getInverseScreenCTM());c.x/=this.scale;c.y/=this.scale;this.dragDeltaXY_=goog.math.Coordinate.difference(b,c)};Blockly.WorkspaceSvg.prototype.moveDrag=function(a){a=Blockly.utils.mouseToSvg(a,this.getParentSvg(),this.getInverseScreenCTM());a.x/=this.scale;a.y/=this.scale;return goog.math.Coordinate.sum(this.dragDeltaXY_,a)};
 Blockly.WorkspaceSvg.prototype.isDragging=function(){return null!=this.currentGesture_&&this.currentGesture_.isDragging()};Blockly.WorkspaceSvg.prototype.isDraggable=function(){return!!this.scrollbar};Blockly.WorkspaceSvg.prototype.onMouseWheel_=function(a){this.currentGesture_&&this.currentGesture_.cancel();var b=-a.deltaY/50,c=Blockly.utils.mouseToSvg(a,this.getParentSvg(),this.getInverseScreenCTM());this.zoom(c.x,c.y,b);a.preventDefault()};
 Blockly.WorkspaceSvg.prototype.getBlocksBoundingBox=function(){var a=this.getTopBlocks(!1),b=this.getTopComments(!1);a=a.concat(b);if(!a.length)return{x:0,y:0,width:0,height:0};b=a[0].getBoundingRectangle();for(var c=1;c<a.length;c++){var d=a[c].getBoundingRectangle();d.topLeft.x<b.topLeft.x&&(b.topLeft.x=d.topLeft.x);d.bottomRight.x>b.bottomRight.x&&(b.bottomRight.x=d.bottomRight.x);d.topLeft.y<b.topLeft.y&&(b.topLeft.y=d.topLeft.y);d.bottomRight.y>b.bottomRight.y&&(b.bottomRight.y=d.bottomRight.y)}return{x:b.topLeft.x,
-y:b.topLeft.y,width:b.bottomRight.x-b.topLeft.x,height:b.bottomRight.y-b.topLeft.y}};Blockly.WorkspaceSvg.prototype.cleanUp=function(){this.setResizesEnabled(!1);Blockly.Events.setGroup(!0);for(var a=this.getTopBlocks(!0),b=0,c=0,d;d=a[c];c++){var e=d.getRelativeToSurfaceXY();d.moveBy(-e.x,b-e.y);d.snapToGrid();b=d.getRelativeToSurfaceXY().y+d.getHeightWidth().height+Blockly.BlockSvg.MIN_BLOCK_Y}Blockly.Events.setGroup(!1);this.setResizesEnabled(!0)};
+y:b.topLeft.y,width:b.bottomRight.x-b.topLeft.x,height:b.bottomRight.y-b.topLeft.y}};Blockly.WorkspaceSvg.prototype.cleanUp=function(){this.setResizesEnabled(!1);Blockly.Events.setGroup(!0);for(var a=this.getTopBlocks(!0),b=0,c=0,d;d=a[c];c++)if(d.isMovable()){var e=d.getRelativeToSurfaceXY();d.moveBy(-e.x,b-e.y);d.snapToGrid();b=d.getRelativeToSurfaceXY().y+d.getHeightWidth().height+Blockly.BlockSvg.MIN_BLOCK_Y}Blockly.Events.setGroup(!1);this.setResizesEnabled(!0)};
 Blockly.WorkspaceSvg.prototype.showContextMenu_=function(a){function b(a){if(a.isDeletable())p=p.concat(a.getDescendants(!1));else{a=a.getChildren(!1);for(var c=0;c<a.length;c++)b(a[c])}}function c(){Blockly.Events.setGroup(f);var a=p.shift();a&&(a.workspace?(a.dispose(!1,!0),setTimeout(c,10)):c());Blockly.Events.setGroup(!1)}if(!this.options.readOnly&&!this.isFlyout){var d=[],e=this.getTopBlocks(!0),f=Blockly.utils.genUid(),g=this,h={};h.text=Blockly.Msg.UNDO;h.enabled=0<this.undoStack_.length;h.callback=
 this.undo.bind(this,!1);d.push(h);h={};h.text=Blockly.Msg.REDO;h.enabled=0<this.redoStack_.length;h.callback=this.undo.bind(this,!0);d.push(h);this.scrollbar&&(h={},h.text=Blockly.Msg.CLEAN_UP,h.enabled=1<e.length,h.callback=this.cleanUp.bind(this),d.push(h));if(this.options.collapse){for(var k=h=!1,l=0;l<e.length;l++)for(var n=e[l];n;)n.isCollapsed()?h=!0:k=!0,n=n.getNextBlock();var m=function(a){for(var b=0,c=0;c<e.length;c++)for(var d=e[c];d;)setTimeout(d.setCollapsed.bind(d,a),b),d=d.getNextBlock(),
 b+=10};k={enabled:k};k.text=Blockly.Msg.COLLAPSE_ALL;k.callback=function(){m(!0)};d.push(k);h={enabled:h};h.text=Blockly.Msg.EXPAND_ALL;h.callback=function(){m(!1)};d.push(h)}var p=[];for(l=0;l<e.length;l++)b(e[l]);h={text:1==p.length?Blockly.Msg.DELETE_BLOCK:Blockly.Msg.DELETE_X_BLOCKS.replace("%1",String(p.length)),enabled:0<p.length,callback:function(){g.currentGesture_&&g.currentGesture_.cancel();2>p.length?c():Blockly.confirm(Blockly.Msg.DELETE_ALL_BLOCKS.replace("%1",p.length),function(a){a&&
@@ -1366,11 +1375,11 @@ Blockly.Warning.textToDom_=function(a){var b=Blockly.utils.createSvgElement("tex
 Blockly.Warning.prototype.setVisible=function(a){if(a!=this.isVisible())if(Blockly.Events.fire(new Blockly.Events.Ui(this.block_,"warningOpen",!a,a)),a){a=Blockly.Warning.textToDom_(this.getText());this.bubble_=new Blockly.Bubble(this.block_.workspace,a,this.block_.svgPath_,this.iconXY_,null,null);this.bubble_.setSvgId(this.block_.id);if(this.block_.RTL)for(var b=a.getBBox().width,c=0,d;d=a.childNodes[c];c++)d.setAttribute("text-anchor","end"),d.setAttribute("x",b+Blockly.Bubble.BORDER_WIDTH);this.updateColour();
 a=this.bubble_.getBubbleSize();this.bubble_.setBubbleSize(a.width,a.height)}else this.bubble_.dispose(),this.body_=this.bubble_=null};Blockly.Warning.prototype.bodyFocus_=function(a){this.bubble_.promote_()};Blockly.Warning.prototype.setText=function(a,b){this.text_[b]!=a&&(a?this.text_[b]=a:delete this.text_[b],this.isVisible()&&(this.setVisible(!1),this.setVisible(!0)))};Blockly.Warning.prototype.getText=function(){var a=[],b;for(b in this.text_)a.push(this.text_[b]);return a.join("\n")};
 Blockly.Warning.prototype.dispose=function(){this.block_.warning=null;Blockly.Icon.prototype.dispose.call(this)};Blockly.Block=function(a,b,c){if("undefined"!==typeof Blockly.Generator.prototype[b])throw Error('Block prototypeName "'+b+'" conflicts with Blockly.Generator members.');this.id=c&&!a.getBlockById(c)?c:Blockly.utils.genUid();a.blockDB_[this.id]=this;this.previousConnection=this.nextConnection=this.outputConnection=null;this.inputList=[];this.inputsInline=void 0;this.disabled=!1;this.tooltip="";this.contextMenu=!0;this.parentBlock_=null;this.childBlocks_=[];this.editable_=this.movable_=this.deletable_=
-!0;this.collapsed_=this.isShadow_=!1;this.comment=null;this.xy_=new goog.math.Coordinate(0,0);this.workspace=a;this.isInFlyout=a.isFlyout;this.isInMutator=a.isMutator;this.RTL=a.RTL;this.isInsertionMarker_=!1;if(b){this.type=b;c=Blockly.Blocks[b];if(!c||"object"!=typeof c)throw TypeError("Unknown block type: "+b);goog.mixin(this,c)}a.addTopBlock(this);"function"==typeof this.init&&this.init();this.inputsInlineDefault=this.inputsInline;if(Blockly.Events.isEnabled()){(a=Blockly.Events.getGroup())||
+!0;this.collapsed_=this.isShadow_=!1;this.comment=null;this.xy_=new goog.math.Coordinate(0,0);this.workspace=a;this.isInFlyout=a.isFlyout;this.isInMutator=a.isMutator;this.RTL=a.RTL;this.isInsertionMarker_=!1;if(b){this.type=b;c=Blockly.Blocks[b];if(!c||"object"!=typeof c)throw TypeError("Unknown block type: "+b);goog.mixin(this,c)}a.addTopBlock(this);a.addTypedBlock(this);"function"==typeof this.init&&this.init();this.inputsInlineDefault=this.inputsInline;if(Blockly.Events.isEnabled()){(a=Blockly.Events.getGroup())||
 Blockly.Events.setGroup(!0);try{Blockly.Events.fire(new Blockly.Events.BlockCreate(this))}finally{a||Blockly.Events.setGroup(!1)}}"function"==typeof this.onchange&&this.setOnChange(this.onchange)};Blockly.Block.obtain=function(a,b){console.warn("Deprecated call to Blockly.Block.obtain, use workspace.newBlock instead.");return a.newBlock(b)};Blockly.Block.prototype.data=null;Blockly.Block.prototype.colour_="#000000";Blockly.Block.prototype.hue_=null;
-Blockly.Block.prototype.dispose=function(a){if(this.workspace){this.onchangeWrapper_&&this.workspace.removeChangeListener(this.onchangeWrapper_);this.unplug(a);Blockly.Events.isEnabled()&&Blockly.Events.fire(new Blockly.Events.BlockDelete(this));Blockly.Events.disable();try{this.workspace&&(this.workspace.removeTopBlock(this),delete this.workspace.blockDB_[this.id],this.workspace=null);Blockly.selected==this&&(Blockly.selected=null);for(var b=this.childBlocks_.length-1;0<=b;b--)this.childBlocks_[b].dispose(!1);
-b=0;for(var c;c=this.inputList[b];b++)c.dispose();this.inputList.length=0;var d=this.getConnections_(!0);for(b=0;b<d.length;b++){var e=d[b];e.isConnected()&&e.disconnect();d[b].dispose()}}finally{Blockly.Events.enable()}}};Blockly.Block.prototype.initModel=function(){for(var a=0,b;b=this.inputList[a];a++)for(var c=0,d;d=b.fieldRow[c];c++)d.initModel&&d.initModel()};Blockly.Block.prototype.unplug=function(a){this.outputConnection?this.unplugFromRow_(a):this.previousConnection&&this.unplugFromStack_(a)};
-Blockly.Block.prototype.unplugFromRow_=function(a){var b=null;this.outputConnection.isConnected()&&(b=this.outputConnection.targetConnection,this.outputConnection.disconnect());b&&a&&(a=this.getOnlyValueConnection_())&&a.isConnected()&&(a=a.targetConnection,a.checkType_(b)&&(a.disconnect(),b.connect(a)))};
+Blockly.Block.prototype.dispose=function(a){if(this.workspace){this.onchangeWrapper_&&this.workspace.removeChangeListener(this.onchangeWrapper_);this.unplug(a);Blockly.Events.isEnabled()&&Blockly.Events.fire(new Blockly.Events.BlockDelete(this));Blockly.Events.disable();try{this.workspace&&(this.workspace.removeTopBlock(this),this.workspace.removeTypedBlock(this),delete this.workspace.blockDB_[this.id],this.workspace=null);Blockly.selected==this&&(Blockly.selected=null);for(var b=this.childBlocks_.length-
+1;0<=b;b--)this.childBlocks_[b].dispose(!1);b=0;for(var c;c=this.inputList[b];b++)c.dispose();this.inputList.length=0;var d=this.getConnections_(!0);for(b=0;b<d.length;b++){var e=d[b];e.isConnected()&&e.disconnect();d[b].dispose()}}finally{Blockly.Events.enable()}}};Blockly.Block.prototype.initModel=function(){for(var a=0,b;b=this.inputList[a];a++)for(var c=0,d;d=b.fieldRow[c];c++)d.initModel&&d.initModel()};
+Blockly.Block.prototype.unplug=function(a){this.outputConnection?this.unplugFromRow_(a):this.previousConnection&&this.unplugFromStack_(a)};Blockly.Block.prototype.unplugFromRow_=function(a){var b=null;this.outputConnection.isConnected()&&(b=this.outputConnection.targetConnection,this.outputConnection.disconnect());b&&a&&(a=this.getOnlyValueConnection_())&&a.isConnected()&&(a=a.targetConnection,a.checkType_(b)&&(a.disconnect(),b.connect(a)))};
 Blockly.Block.prototype.getOnlyValueConnection_=function(){for(var a=null,b=0;b<this.inputList.length;b++){var c=this.inputList[b].connection;if(c&&c.type==Blockly.INPUT_VALUE){if(a)return null;a=c}}return a};
 Blockly.Block.prototype.unplugFromStack_=function(a){var b=null;this.previousConnection.isConnected()&&(b=this.previousConnection.targetConnection,this.previousConnection.disconnect());var c=this.getNextBlock();a&&c&&(a=this.nextConnection.targetConnection,a.disconnect(),b&&b.checkType_(a)&&b.connect(a))};
 Blockly.Block.prototype.getConnections_=function(a){a=[];this.outputConnection&&a.push(this.outputConnection);this.previousConnection&&a.push(this.previousConnection);this.nextConnection&&a.push(this.nextConnection);for(var b=0,c;c=this.inputList[b];b++)c.connection&&a.push(c.connection);return a};Blockly.Block.prototype.lastConnectionInStack=function(){for(var a=this.nextConnection;a;){var b=a.targetBlock();if(!b)return a;a=b.nextConnection}return null};Blockly.Block.prototype.bumpNeighbours_=function(){console.warn("Not expected to reach this bumpNeighbours_ function. The BlockSvg function for bumpNeighbours_ was expected to be called instead.")};
@@ -1379,8 +1388,8 @@ Blockly.Block.prototype.getPreviousBlock=function(){return this.previousConnecti
 Blockly.Block.prototype.getChildren=function(a){if(!a)return this.childBlocks_;a=[];for(var b=0,c;c=this.inputList[b];b++)c.connection&&(c=c.connection.targetBlock())&&a.push(c);(b=this.getNextBlock())&&a.push(b);return a};
 Blockly.Block.prototype.setParent=function(a){if(a!=this.parentBlock_){if(this.parentBlock_){Blockly.utils.arrayRemove(this.parentBlock_.childBlocks_,this);if(this.previousConnection&&this.previousConnection.isConnected())throw Error("Still connected to previous block.");if(this.outputConnection&&this.outputConnection.isConnected())throw Error("Still connected to parent block.");this.parentBlock_=null}else this.workspace.removeTopBlock(this);(this.parentBlock_=a)?a.childBlocks_.push(this):this.workspace.addTopBlock(this)}};
 Blockly.Block.prototype.getDescendants=function(a){for(var b=[this],c=this.getChildren(a),d,e=0;d=c[e];e++)b.push.apply(b,d.getDescendants(a));return b};Blockly.Block.prototype.isDeletable=function(){return this.deletable_&&!this.isShadow_&&!(this.workspace&&this.workspace.options.readOnly)};Blockly.Block.prototype.setDeletable=function(a){this.deletable_=a};Blockly.Block.prototype.isMovable=function(){return this.movable_&&!this.isShadow_&&!(this.workspace&&this.workspace.options.readOnly)};
-Blockly.Block.prototype.setMovable=function(a){this.movable_=a};Blockly.Block.prototype.isShadow=function(){return this.isShadow_};Blockly.Block.prototype.setShadow=function(a){this.isShadow_=a};Blockly.Block.prototype.isInsertionMarker=function(){return this.isInsertionMarker_};Blockly.Block.prototype.setInsertionMarker=function(a){this.isInsertionMarker_=a};Blockly.Block.prototype.isEditable=function(){return this.editable_&&!(this.workspace&&this.workspace.options.readOnly)};
-Blockly.Block.prototype.setEditable=function(a){this.editable_=a;a=0;for(var b;b=this.inputList[a];a++)for(var c=0,d;d=b.fieldRow[c];c++)d.updateEditable()};
+Blockly.Block.prototype.setMovable=function(a){this.movable_=a};Blockly.Block.prototype.isDuplicatable=function(){return this.workspace.hasBlockLimits()?this.workspace.isCapacityAvailable(Blockly.utils.getBlockTypeCounts(this,!0)):!0};Blockly.Block.prototype.isShadow=function(){return this.isShadow_};Blockly.Block.prototype.setShadow=function(a){this.isShadow_=a};Blockly.Block.prototype.isInsertionMarker=function(){return this.isInsertionMarker_};
+Blockly.Block.prototype.setInsertionMarker=function(a){this.isInsertionMarker_=a};Blockly.Block.prototype.isEditable=function(){return this.editable_&&!(this.workspace&&this.workspace.options.readOnly)};Blockly.Block.prototype.setEditable=function(a){this.editable_=a;a=0;for(var b;b=this.inputList[a];a++)for(var c=0,d;d=b.fieldRow[c];c++)d.updateEditable()};
 Blockly.Block.prototype.setConnectionsHidden=function(a){if(!a&&this.isCollapsed()){if(this.outputConnection&&this.outputConnection.setHidden(a),this.previousConnection&&this.previousConnection.setHidden(a),this.nextConnection){this.nextConnection.setHidden(a);var b=this.nextConnection.targetBlock();b&&b.setConnectionsHidden(a)}}else for(var c=this.getConnections_(!0),d=0;b=c[d];d++)b.setHidden(a),b.isSuperior()&&(b=b.targetBlock())&&b.setConnectionsHidden(a)};
 Blockly.Block.prototype.getMatchingConnection=function(a,b){var c=this.getConnections_(!0),d=a.getConnections_(!0);if(c.length!=d.length)throw Error("Connection lists did not match in length.");for(var e=0;e<d.length;e++)if(d[e]==b)return c[e];return null};Blockly.Block.prototype.setHelpUrl=function(a){this.helpUrl=a};Blockly.Block.prototype.setTooltip=function(a){this.tooltip=a};Blockly.Block.prototype.getColour=function(){return this.colour_};Blockly.Block.prototype.getHue=function(){return this.hue_};
 Blockly.Block.prototype.setColour=function(a){var b="string"==typeof a?Blockly.utils.replaceMessageReferences(a):a,c=Number(b);if(!isNaN(c)&&0<=c&&360>=c)this.hue_=c,this.colour_=Blockly.hueToRgb(c);else if("string"==typeof b&&/^#[0-9a-fA-F]{6}$/.test(b))this.colour_=b,this.hue_=null;else throw c='Invalid colour: "'+b+'"',a!=b&&(c+=' (from "'+a+'")'),c;};
@@ -1421,7 +1430,7 @@ Blockly.ContextMenu.position_=function(a,b,c){var d=Blockly.utils.getViewportBBo
 Blockly.ContextMenu.createWidget_=function(a){a.render(Blockly.WidgetDiv.DIV);var b=a.getElement();Blockly.utils.addClass(b,"blocklyContextMenu");Blockly.bindEventWithChecks_(b,"contextmenu",null,Blockly.utils.noEvent);a.setAllowAutoFocus(!0)};Blockly.ContextMenu.hide=function(){Blockly.WidgetDiv.hideIfOwner(Blockly.ContextMenu);Blockly.ContextMenu.currentBlock=null;Blockly.ContextMenu.eventWrapper_&&Blockly.unbindEvent_(Blockly.ContextMenu.eventWrapper_)};
 Blockly.ContextMenu.callbackFactory=function(a,b){return function(){Blockly.Events.disable();try{var c=Blockly.Xml.domToBlock(b,a.workspace),d=a.getRelativeToSurfaceXY();d.x=a.RTL?d.x-Blockly.SNAP_RADIUS:d.x+Blockly.SNAP_RADIUS;d.y+=2*Blockly.SNAP_RADIUS;c.moveBy(d.x,d.y)}finally{Blockly.Events.enable()}Blockly.Events.isEnabled()&&!c.isShadow()&&Blockly.Events.fire(new Blockly.Events.BlockCreate(c));c.select()}};
 Blockly.ContextMenu.blockDeleteOption=function(a){var b=a.getDescendants(!1).length,c=a.getNextBlock();c&&(b-=c.getDescendants(!1).length);return{text:1==b?Blockly.Msg.DELETE_BLOCK:Blockly.Msg.DELETE_X_BLOCKS.replace("%1",String(b)),enabled:!0,callback:function(){Blockly.Events.setGroup(!0);a.dispose(!0,!0);Blockly.Events.setGroup(!1)}}};Blockly.ContextMenu.blockHelpOption=function(a){return{enabled:!("function"==typeof a.helpUrl?!a.helpUrl():!a.helpUrl),text:Blockly.Msg.HELP,callback:function(){a.showHelp_()}}};
-Blockly.ContextMenu.blockDuplicateOption=function(a){var b=!0;a.getDescendants(!1).length>a.workspace.remainingCapacity()&&(b=!1);return{text:Blockly.Msg.DUPLICATE_BLOCK,enabled:b,callback:function(){Blockly.duplicate_(a)}}};Blockly.ContextMenu.blockCommentOption=function(a){var b={enabled:!goog.userAgent.IE};a.comment?(b.text=Blockly.Msg.REMOVE_COMMENT,b.callback=function(){a.setCommentText(null)}):(b.text=Blockly.Msg.ADD_COMMENT,b.callback=function(){a.setCommentText("")});return b};
+Blockly.ContextMenu.blockDuplicateOption=function(a){var b=a.isDuplicatable();return{text:Blockly.Msg.DUPLICATE_BLOCK,enabled:b,callback:function(){Blockly.duplicate_(a)}}};Blockly.ContextMenu.blockCommentOption=function(a){var b={enabled:!goog.userAgent.IE};a.comment?(b.text=Blockly.Msg.REMOVE_COMMENT,b.callback=function(){a.setCommentText(null)}):(b.text=Blockly.Msg.ADD_COMMENT,b.callback=function(){a.setCommentText("")});return b};
 Blockly.ContextMenu.commentDeleteOption=function(a){return{text:Blockly.Msg.REMOVE_COMMENT,enabled:!0,callback:function(){Blockly.Events.setGroup(!0);a.dispose(!0,!0);Blockly.Events.setGroup(!1)}}};Blockly.ContextMenu.commentDuplicateOption=function(a){return{text:Blockly.Msg.DUPLICATE_COMMENT,enabled:!0,callback:function(){Blockly.duplicate_(a)}}};
 Blockly.ContextMenu.workspaceCommentOption=function(a,b){var c={enabled:!goog.userAgent.IE};c.text=Blockly.Msg.ADD_COMMENT;c.callback=function(){var c=new Blockly.WorkspaceCommentSvg(a,Blockly.Msg.WORKSPACE_COMMENT_DEFAULT_TEXT,Blockly.WorkspaceCommentSvg.DEFAULT_SIZE,Blockly.WorkspaceCommentSvg.DEFAULT_SIZE),e=a.getInjectionDiv().getBoundingClientRect();e=new goog.math.Coordinate(b.clientX-e.left,b.clientY-e.top);var f=a.getOriginOffsetInPixels();e=goog.math.Coordinate.difference(e,f).scale(1/a.scale);
 c.moveBy(e.x,e.y);a.rendered&&(c.initSvg(),c.render(!1),c.select())};return c};Blockly.BlockSvg=function(a,b,c){this.svgGroup_=Blockly.utils.createSvgElement("g",{},null);this.svgGroup_.translate_="";this.svgPathDark_=Blockly.utils.createSvgElement("path",{"class":"blocklyPathDark",transform:"translate(1,1)"},this.svgGroup_);this.svgPath_=Blockly.utils.createSvgElement("path",{"class":"blocklyPath"},this.svgGroup_);this.svgPathLight_=Blockly.utils.createSvgElement("path",{"class":"blocklyPathLight"},this.svgGroup_);this.svgPath_.tooltip=this;this.rendered=!1;this.useDragSurface_=
@@ -1472,10 +1481,11 @@ Blockly.BlockSvg.INNER_TOP_LEFT_CORNER=Blockly.BlockSvg.NOTCH_PATH_RIGHT+" h -"+
 Blockly.BlockSvg.INNER_TOP_LEFT_CORNER_HIGHLIGHT_RTL="a "+Blockly.BlockSvg.CORNER_RADIUS+","+Blockly.BlockSvg.CORNER_RADIUS+" 0 0,0 "+(-Blockly.BlockSvg.DISTANCE_45_OUTSIDE-.5)+","+(Blockly.BlockSvg.CORNER_RADIUS-Blockly.BlockSvg.DISTANCE_45_OUTSIDE);Blockly.BlockSvg.INNER_BOTTOM_LEFT_CORNER_HIGHLIGHT_RTL="a "+(Blockly.BlockSvg.CORNER_RADIUS+.5)+","+(Blockly.BlockSvg.CORNER_RADIUS+.5)+" 0 0,0 "+(Blockly.BlockSvg.CORNER_RADIUS+.5)+","+(Blockly.BlockSvg.CORNER_RADIUS+.5);
 Blockly.BlockSvg.INNER_BOTTOM_LEFT_CORNER_HIGHLIGHT_LTR="a "+(Blockly.BlockSvg.CORNER_RADIUS+.5)+","+(Blockly.BlockSvg.CORNER_RADIUS+.5)+" 0 0,0 "+(Blockly.BlockSvg.CORNER_RADIUS-Blockly.BlockSvg.DISTANCE_45_OUTSIDE)+","+(Blockly.BlockSvg.DISTANCE_45_OUTSIDE+.5);Blockly.BlockSvg.prototype.getHeightWidth=function(){var a=this.height,b=this.width,c=this.getNextBlock();c?(c=c.getHeightWidth(),a+=c.height-4,b=Math.max(b,c.width)):this.nextConnection||this.outputConnection||(a+=2);return{height:a,width:b}};
 Blockly.BlockSvg.prototype.render=function(a){Blockly.Field.startCache();this.rendered=!0;var b=Blockly.BlockSvg.SEP_SPACE_X;this.RTL&&(b=-b);for(var c=this.getIcons(),d=0;d<c.length;d++)b=c[d].renderIcon(b);b+=this.RTL?Blockly.BlockSvg.SEP_SPACE_X:-Blockly.BlockSvg.SEP_SPACE_X;c=this.renderCompute_(b);this.renderDraw_(b,c);this.renderMoveConnections_();!1!==a&&((a=this.getParent())?a.render(!0):this.workspace.resizeContents());Blockly.Field.stopCache()};
-Blockly.BlockSvg.prototype.renderFields_=function(a,b,c){c+=Blockly.BlockSvg.INLINE_PADDING_Y;this.RTL&&(b=-b);for(var d=0,e;e=a[d];d++){var f=e.getSvgRoot();f&&(this.RTL?(b-=e.renderSep+e.renderWidth,f.setAttribute("transform","translate("+b+","+c+")"),e.renderWidth&&(b-=Blockly.BlockSvg.SEP_SPACE_X)):(f.setAttribute("transform","translate("+(b+e.renderSep)+","+c+")"),e.renderWidth&&(b+=e.renderSep+e.renderWidth+Blockly.BlockSvg.SEP_SPACE_X)))}return this.RTL?-b:b};
+Blockly.BlockSvg.prototype.renderFields_=function(a,b,c){c+=Blockly.BlockSvg.INLINE_PADDING_Y;this.RTL&&(b=-b);for(var d=0,e;e=a[d];d++){var f=e.getSvgRoot();f&&(this.RTL?(b-=e.renderSep+e.renderWidth,f.setAttribute("transform","translate("+b+","+c+")"),e.renderWidth&&(b-=Blockly.BlockSvg.SEP_SPACE_X)):(f.setAttribute("transform","translate("+(b+e.renderSep)+","+c+")"),e.renderWidth&&(b+=e.renderSep+e.renderWidth+Blockly.BlockSvg.SEP_SPACE_X)),this.isInsertionMarker()&&f.setAttribute("display","none"))}return this.RTL?
+-b:b};
 Blockly.BlockSvg.prototype.renderCompute_=function(a){var b=this.inputList,c=[];c.rightEdge=a+2*Blockly.BlockSvg.SEP_SPACE_X;if(this.previousConnection||this.nextConnection)c.rightEdge=Math.max(c.rightEdge,Blockly.BlockSvg.NOTCH_WIDTH+Blockly.BlockSvg.SEP_SPACE_X);for(var d=0,e=0,f=!1,g=!1,h=!1,k=void 0,l=this.getInputsInline()&&!this.isCollapsed(),n=0,m;m=b[n];n++)if(m.isVisible()){if(l&&k&&k!=Blockly.NEXT_STATEMENT&&m.type!=Blockly.NEXT_STATEMENT)var p=c[c.length-1];else k=m.type,p=[],p.type=l&&
 m.type!=Blockly.NEXT_STATEMENT?Blockly.BlockSvg.INLINE:m.type,p.height=0,c.push(p);p.push(m);m.renderHeight=Blockly.BlockSvg.MIN_BLOCK_Y;m.renderWidth=l&&m.type==Blockly.INPUT_VALUE?Blockly.BlockSvg.TAB_WIDTH+1.25*Blockly.BlockSvg.SEP_SPACE_X:0;if(m.connection&&m.connection.isConnected()){var q=m.connection.targetBlock().getHeightWidth();m.renderHeight=Math.max(m.renderHeight,q.height);m.renderWidth=Math.max(m.renderWidth,q.width)}l||n!=b.length-1?!l&&m.type==Blockly.INPUT_VALUE&&b[n+1]&&b[n+1].type==
-Blockly.NEXT_STATEMENT&&m.renderHeight--:m.renderHeight--;p.height=Math.max(p.height,m.renderHeight);m.fieldWidth=0;1==c.length&&(m.fieldWidth+=this.RTL?-a:a);q=!1;for(var t=0,r;r=m.fieldRow[t];t++){0!=t&&(m.fieldWidth+=Blockly.BlockSvg.SEP_SPACE_X);var u=r.getSize();r.renderWidth=u.width;r.renderSep=q&&r.EDITABLE?Blockly.BlockSvg.SEP_SPACE_X:0;m.fieldWidth+=r.renderWidth+r.renderSep;p.height=Math.max(p.height,u.height);q=r.EDITABLE}p.type!=Blockly.BlockSvg.INLINE&&(p.type==Blockly.NEXT_STATEMENT?
+Blockly.NEXT_STATEMENT&&m.renderHeight--:m.renderHeight--;p.height=Math.max(p.height,m.renderHeight);m.fieldWidth=0;1==c.length&&(m.fieldWidth+=this.RTL?-a:a);q=!1;for(var r=0,t;t=m.fieldRow[r];r++){0!=r&&(m.fieldWidth+=Blockly.BlockSvg.SEP_SPACE_X);var u=t.getSize();t.renderWidth=u.width;t.renderSep=q&&t.EDITABLE?Blockly.BlockSvg.SEP_SPACE_X:0;m.fieldWidth+=t.renderWidth+t.renderSep;p.height=Math.max(p.height,u.height);q=t.EDITABLE}p.type!=Blockly.BlockSvg.INLINE&&(p.type==Blockly.NEXT_STATEMENT?
 (g=!0,e=Math.max(e,m.fieldWidth)):(p.type==Blockly.INPUT_VALUE?f=!0:p.type==Blockly.DUMMY_INPUT&&(h=!0),d=Math.max(d,m.fieldWidth)))}for(a=0;p=c[a];a++)if(p.thicker=!1,p.type==Blockly.BlockSvg.INLINE)for(b=0;m=p[b];b++)if(m.type==Blockly.INPUT_VALUE){p.height+=2*Blockly.BlockSvg.INLINE_PADDING_Y;p.thicker=!0;break}c.statementEdge=2*Blockly.BlockSvg.SEP_SPACE_X+e;g&&(c.rightEdge=Math.max(c.rightEdge,c.statementEdge+Blockly.BlockSvg.NOTCH_WIDTH));f?c.rightEdge=Math.max(c.rightEdge,d+2*Blockly.BlockSvg.SEP_SPACE_X+
 Blockly.BlockSvg.TAB_WIDTH):h&&(c.rightEdge=Math.max(c.rightEdge,d+2*Blockly.BlockSvg.SEP_SPACE_X));c.hasValue=f;c.hasStatement=g;c.hasDummy=h;return c};
 Blockly.BlockSvg.prototype.renderDraw_=function(a,b){this.startHat_=!1;this.height=0;if(this.outputConnection)this.squareBottomLeftCorner_=this.squareTopLeftCorner_=!0;else{this.squareBottomLeftCorner_=this.squareTopLeftCorner_=!1;if(this.previousConnection){var c=this.previousConnection.targetBlock();c&&c.getNextBlock()==this&&(this.squareTopLeftCorner_=!0)}else Blockly.BlockSvg.START_HAT&&(this.startHat_=this.squareTopLeftCorner_=!0,this.height+=Blockly.BlockSvg.START_HAT_HEIGHT,b.rightEdge=Math.max(b.rightEdge,
@@ -1501,7 +1511,7 @@ Blockly.BlockSvg.prototype.renderDummyInput_=function(a,b,c,d,e){var f=a.steps;a
 Blockly.BlockSvg.prototype.renderStatementInput_=function(a,b,c,d,e,f){var g=a.steps;a=a.highlightSteps;var h=b[0];0==f&&(g.push("v",Blockly.BlockSvg.SEP_SPACE_Y),this.RTL&&a.push("v",Blockly.BlockSvg.SEP_SPACE_Y-1),c.y+=Blockly.BlockSvg.SEP_SPACE_Y);var k=c.x,l=c.y;if(h.align!=Blockly.ALIGN_LEFT){var n=e.statementEdge-h.fieldWidth-2*Blockly.BlockSvg.SEP_SPACE_X;h.align==Blockly.ALIGN_RIGHT?k+=n:h.align==Blockly.ALIGN_CENTRE&&(k+=n/2)}this.renderFields_(h.fieldRow,k,l);c.x=e.statementEdge+Blockly.BlockSvg.NOTCH_WIDTH;
 g.push("H",c.x);g.push(Blockly.BlockSvg.INNER_TOP_LEFT_CORNER);g.push("v",b.height-2*Blockly.BlockSvg.CORNER_RADIUS);g.push(Blockly.BlockSvg.INNER_BOTTOM_LEFT_CORNER);g.push("H",e.rightEdge);this.RTL?(a.push("M",c.x-Blockly.BlockSvg.NOTCH_WIDTH+Blockly.BlockSvg.DISTANCE_45_OUTSIDE+","+(c.y+Blockly.BlockSvg.DISTANCE_45_OUTSIDE)),a.push(Blockly.BlockSvg.INNER_TOP_LEFT_CORNER_HIGHLIGHT_RTL),a.push("v",b.height-2*Blockly.BlockSvg.CORNER_RADIUS),a.push(Blockly.BlockSvg.INNER_BOTTOM_LEFT_CORNER_HIGHLIGHT_RTL)):
 (a.push("M",c.x-Blockly.BlockSvg.NOTCH_WIDTH+Blockly.BlockSvg.DISTANCE_45_OUTSIDE+","+(c.y+b.height-Blockly.BlockSvg.DISTANCE_45_OUTSIDE)),a.push(Blockly.BlockSvg.INNER_BOTTOM_LEFT_CORNER_HIGHLIGHT_LTR));a.push("H",e.rightEdge-.5);d.x=this.RTL?-c.x:c.x+1;h.connection.setOffsetInBlock(d.x,c.y+1);h.connection.isConnected()&&(this.width=Math.max(this.width,e.statementEdge+h.connection.targetBlock().getHeightWidth().width));if(f==e.length-1||e[f+1].type==Blockly.NEXT_STATEMENT)g.push("v",Blockly.BlockSvg.SEP_SPACE_Y),
-this.RTL&&a.push("v",Blockly.BlockSvg.SEP_SPACE_Y-1),c.y+=Blockly.BlockSvg.SEP_SPACE_Y};Blockly.Msg={};goog.getMsgOrig=goog.getMsg;goog.getMsg=function(a,b){var c=goog.getMsg.blocklyMsgMap[a];c&&(a=Blockly.Msg[c]);return goog.getMsgOrig(a,b)};goog.getMsg.blocklyMsgMap={Today:"TODAY"};Blockly.FieldTextInput=function(a,b){Blockly.FieldTextInput.superClass_.constructor.call(this,a,b)};goog.inherits(Blockly.FieldTextInput,Blockly.Field);Blockly.FieldTextInput.fromJson=function(a){var b=Blockly.utils.replaceMessageReferences(a.text);b=new Blockly.FieldTextInput(b,a["class"]);"boolean"===typeof a.spellcheck&&b.setSpellcheck(a.spellcheck);return b};Blockly.FieldTextInput.FONTSIZE=11;Blockly.FieldTextInput.htmlInput_=null;Blockly.FieldTextInput.prototype.CURSOR="text";
+this.RTL&&a.push("v",Blockly.BlockSvg.SEP_SPACE_Y-1),c.y+=Blockly.BlockSvg.SEP_SPACE_Y};Blockly.BlockSvg.prototype.positionNewBlock=function(a,b,c){b.type!=Blockly.NEXT_STATEMENT&&b.type!=Blockly.INPUT_VALUE||a.moveBy(c.x_-b.x_,c.y_-b.y_)};Blockly.BlockSvg.prototype.highlightForReplacement=function(a){a?Blockly.utils.addClass(this.svgGroup_,"blocklyReplaceable"):Blockly.utils.removeClass(this.svgGroup_,"blocklyReplaceable")};Blockly.Msg={};goog.getMsgOrig=goog.getMsg;goog.getMsg=function(a,b){var c=goog.getMsg.blocklyMsgMap[a];c&&(a=Blockly.Msg[c]);return goog.getMsgOrig(a,b)};goog.getMsg.blocklyMsgMap={Today:"TODAY"};Blockly.FieldTextInput=function(a,b){Blockly.FieldTextInput.superClass_.constructor.call(this,a,b)};goog.inherits(Blockly.FieldTextInput,Blockly.Field);Blockly.FieldTextInput.fromJson=function(a){var b=Blockly.utils.replaceMessageReferences(a.text);b=new Blockly.FieldTextInput(b,a["class"]);"boolean"===typeof a.spellcheck&&b.setSpellcheck(a.spellcheck);return b};Blockly.FieldTextInput.FONTSIZE=11;Blockly.FieldTextInput.htmlInput_=null;Blockly.FieldTextInput.prototype.CURSOR="text";
 Blockly.FieldTextInput.prototype.spellcheck_=!0;Blockly.FieldTextInput.prototype.dispose=function(){Blockly.WidgetDiv.hideIfOwner(this);Blockly.FieldTextInput.superClass_.dispose.call(this)};Blockly.FieldTextInput.prototype.setValue=function(a){if(null!==a){if(this.sourceBlock_){var b=this.callValidator(a);null!==b&&(a=b)}Blockly.Field.prototype.setValue.call(this,a)}};
 Blockly.FieldTextInput.prototype.setText=function(a){null!==a&&(a=String(a),a!==this.text_&&(this.sourceBlock_&&Blockly.Events.isEnabled()&&Blockly.Events.fire(new Blockly.Events.BlockChange(this.sourceBlock_,"field",this.name,this.text_,a)),Blockly.Field.prototype.setText.call(this,a)))};Blockly.FieldTextInput.prototype.setSpellcheck=function(a){this.spellcheck_=a};
 Blockly.FieldTextInput.prototype.showEditor_=function(a){this.workspace_=this.sourceBlock_.workspace;a=a||!1;!a&&(goog.userAgent.MOBILE||goog.userAgent.ANDROID||goog.userAgent.IPAD)?this.showPromptEditor_():this.showInlineEditor_(a)};Blockly.FieldTextInput.prototype.showPromptEditor_=function(){var a=this;Blockly.prompt(Blockly.Msg.CHANGE_VALUE_TITLE,this.text_,function(b){a.sourceBlock_&&(b=a.callValidator(b));a.setValue(b)})};
@@ -1509,7 +1519,7 @@ Blockly.FieldTextInput.prototype.showInlineEditor_=function(a){Blockly.WidgetDiv
 a||(c.focus(),c.select());this.bindEvents_(c)};Blockly.FieldTextInput.prototype.bindEvents_=function(a){a.onKeyDownWrapper_=Blockly.bindEventWithChecks_(a,"keydown",this,this.onHtmlInputKeyDown_);a.onKeyUpWrapper_=Blockly.bindEventWithChecks_(a,"keyup",this,this.onHtmlInputChange_);a.onKeyPressWrapper_=Blockly.bindEventWithChecks_(a,"keypress",this,this.onHtmlInputChange_);a.onWorkspaceChangeWrapper_=this.resizeEditor_.bind(this);this.workspace_.addChangeListener(a.onWorkspaceChangeWrapper_)};
 Blockly.FieldTextInput.prototype.unbindEvents_=function(a){Blockly.unbindEvent_(a.onKeyDownWrapper_);Blockly.unbindEvent_(a.onKeyUpWrapper_);Blockly.unbindEvent_(a.onKeyPressWrapper_);this.workspace_.removeChangeListener(a.onWorkspaceChangeWrapper_)};
 Blockly.FieldTextInput.prototype.onHtmlInputKeyDown_=function(a){var b=Blockly.FieldTextInput.htmlInput_;13==a.keyCode?Blockly.WidgetDiv.hide():27==a.keyCode?(b.value=b.defaultValue,Blockly.WidgetDiv.hide()):9==a.keyCode&&(Blockly.WidgetDiv.hide(),this.sourceBlock_.tab(this,!a.shiftKey),a.preventDefault())};
-Blockly.FieldTextInput.prototype.onHtmlInputChange_=function(a){a=Blockly.FieldTextInput.htmlInput_;var b=a.value;b!==a.oldValue_?(a.oldValue_=b,this.setValue(b),this.validate_()):goog.userAgent.WEBKIT&&this.sourceBlock_.render();this.resizeEditor_();Blockly.svgResize(this.sourceBlock_.workspace)};
+Blockly.FieldTextInput.prototype.onHtmlInputChange_=function(a){a=Blockly.FieldTextInput.htmlInput_;var b=a.value;b!==a.oldValue_?(a.oldValue_=b,Blockly.Events.setGroup(!0),this.setValue(b),Blockly.Events.setGroup(!1),this.validate_()):goog.userAgent.WEBKIT&&this.sourceBlock_.render();this.resizeEditor_();Blockly.svgResize(this.sourceBlock_.workspace)};
 Blockly.FieldTextInput.prototype.validate_=function(){var a=!0;if(!Blockly.FieldTextInput.htmlInput_)throw Error("htmlInput not defined");var b=Blockly.FieldTextInput.htmlInput_;this.sourceBlock_&&(a=this.callValidator(b.value));null===a?Blockly.utils.addClass(b,"blocklyInvalidInput"):Blockly.utils.removeClass(b,"blocklyInvalidInput")};
 Blockly.FieldTextInput.prototype.resizeEditor_=function(){var a=Blockly.WidgetDiv.DIV,b=this.getScaledBBox_();a.style.width=b.right-b.left+"px";a.style.height=b.bottom-b.top+"px";b=new goog.math.Coordinate(this.sourceBlock_.RTL?b.right-a.offsetWidth:b.left,b.top);b.y+=1;goog.userAgent.GECKO&&Blockly.WidgetDiv.DIV.style.top&&(--b.x,--b.y);goog.userAgent.WEBKIT&&(b.y-=3);a.style.left=b.x+"px";a.style.top=b.y+"px"};
 Blockly.FieldTextInput.prototype.widgetDispose_=function(){var a=this;return function(){var b=Blockly.FieldTextInput.htmlInput_;a.maybeSaveEdit_();a.unbindEvents_(b);Blockly.FieldTextInput.htmlInput_=null;Blockly.Events.setGroup(!1);b=Blockly.WidgetDiv.DIV.style;b.width="auto";b.height="auto";b.fontSize=""}};
@@ -1552,7 +1562,7 @@ Blockly.FieldDropdown.prototype.renderSelectedImage_=function(){this.imageElemen
 a;this.sourceBlock_.RTL?(this.imageElement_.setAttribute("x",a),this.textElement_.setAttribute("x",-1)):(this.textElement_.setAttribute("text-anchor","end"),this.textElement_.setAttribute("x",this.size_.width+1))};
 Blockly.FieldDropdown.prototype.renderSelectedText_=function(){var a=document.createTextNode(this.getDisplayText_());this.textElement_.appendChild(a);this.sourceBlock_.RTL?this.textElement_.insertBefore(this.arrow_,this.textElement_.firstChild):this.textElement_.appendChild(this.arrow_);this.textElement_.setAttribute("text-anchor","start");this.textElement_.setAttribute("x",0);this.size_.height=Blockly.BlockSvg.MIN_BLOCK_Y;this.size_.width=Blockly.Field.getCachedWidth(this.textElement_)};
 Blockly.FieldDropdown.prototype.updateWidth=function(){if(this.imageJson_&&(goog.userAgent.IE||goog.userAgent.EDGE)){var a=Blockly.Field.getCachedWidth(this.arrow_);a=Number(this.imageJson_.width)+a+Blockly.BlockSvg.SEP_SPACE_X;this.borderRect_&&this.borderRect_.setAttribute("width",a);this.size_.width=a}else Blockly.Field.prototype.updateWidth.call(this)};Blockly.FieldDropdown.prototype.dispose=function(){Blockly.WidgetDiv.hideIfOwner(this);Blockly.FieldDropdown.superClass_.dispose.call(this)};
-Blockly.FieldDropdown.validateOptions_=function(a){if(!Array.isArray(a))throw TypeError("FieldDropdown options must be an array.");for(var b=!1,c=0;c<a.length;++c){var d=a[c];Array.isArray(a)?"string"!=typeof d[1]?(b=!0,console.error("Invalid option["+c+"]: Each FieldDropdown option id must be a string. Found "+d[1]+" in: ",d)):"string"!=typeof d[0]&&"string"!=typeof d[0].src&&(b=!0,console.error("Invalid option["+c+"]: Each FieldDropdown option must have a string label or image description. Found"+
+Blockly.FieldDropdown.validateOptions_=function(a){if(!Array.isArray(a))throw TypeError("FieldDropdown options must be an array.");for(var b=!1,c=0;c<a.length;++c){var d=a[c];Array.isArray(d)?"string"!=typeof d[1]?(b=!0,console.error("Invalid option["+c+"]: Each FieldDropdown option id must be a string. Found "+d[1]+" in: ",d)):"string"!=typeof d[0]&&"string"!=typeof d[0].src&&(b=!0,console.error("Invalid option["+c+"]: Each FieldDropdown option must have a string label or image description. Found"+
 d[0]+" in: ",d)):(b=!0,console.error("Invalid option["+c+"]: Each FieldDropdown option must be an array. Found: ",d))}if(b)throw TypeError("Found invalid FieldDropdown options.");};Blockly.Field.register("field_dropdown",Blockly.FieldDropdown);Blockly.FieldImage=function(a,b,c,d,e){this.sourceBlock_=null;this.height_=Number(c);this.width_=Number(b);this.size_=new goog.math.Size(this.width_,this.height_+2*Blockly.BlockSvg.INLINE_PADDING_Y);this.text_=d||"";this.tooltip_="";this.setValue(a);"function"==typeof e&&(this.clickHandler_=e)};goog.inherits(Blockly.FieldImage,Blockly.Field);
 Blockly.FieldImage.fromJson=function(a){var b=Blockly.utils.replaceMessageReferences(a.src),c=Number(Blockly.utils.replaceMessageReferences(a.width)),d=Number(Blockly.utils.replaceMessageReferences(a.height));a=Blockly.utils.replaceMessageReferences(a.alt);return new Blockly.FieldImage(b,c,d,a)};Blockly.FieldImage.prototype.EDITABLE=!1;
 Blockly.FieldImage.prototype.init=function(){this.fieldGroup_||(this.fieldGroup_=Blockly.utils.createSvgElement("g",{},null),this.visible_||(this.fieldGroup_.style.display="none"),this.imageElement_=Blockly.utils.createSvgElement("image",{height:this.height_+"px",width:this.width_+"px"},this.fieldGroup_),this.setValue(this.src_),this.sourceBlock_.getSvgRoot().appendChild(this.fieldGroup_),this.tooltip_?this.imageElement_.tooltip=this.tooltip_:this.setTooltip(this.sourceBlock_),Blockly.Tooltip.bindMouseEvents(this.imageElement_),
@@ -1572,8 +1582,8 @@ Blockly.Msg.DELETE_VARIABLE&&b.push([Blockly.Msg.DELETE_VARIABLE.replace("%1",a)
 Blockly.FieldVariable.prototype.referencesVariables=function(){return!0};Blockly.Field.register("field_variable",Blockly.FieldVariable);Blockly.Generator=function(a){this.name_=a;this.FUNCTION_NAME_PLACEHOLDER_REGEXP_=new RegExp(this.FUNCTION_NAME_PLACEHOLDER_,"g")};Blockly.Generator.NAME_TYPE="generated_function";Blockly.Generator.prototype.INFINITE_LOOP_TRAP=null;Blockly.Generator.prototype.STATEMENT_PREFIX=null;Blockly.Generator.prototype.INDENT="  ";Blockly.Generator.prototype.COMMENT_WRAP=60;Blockly.Generator.prototype.ORDER_OVERRIDES=[];
 Blockly.Generator.prototype.workspaceToCode=function(a){a||(console.warn("No workspace specified in workspaceToCode call.  Guessing."),a=Blockly.getMainWorkspace());var b=[];this.init(a);a=a.getTopBlocks(!0);for(var c=0,d;d=a[c];c++){var e=this.blockToCode(d);Array.isArray(e)&&(e=e[0]);e&&(d.outputConnection&&(e=this.scrubNakedValue(e)),b.push(e))}b=b.join("\n");b=this.finish(b);b=b.replace(/^\s+\n/,"");b=b.replace(/\n\s+$/,"\n");return b=b.replace(/[ \t]+\n/g,"\n")};
 Blockly.Generator.prototype.prefixLines=function(a,b){return b+a.replace(/(?!\n$)\n/g,"\n"+b)};Blockly.Generator.prototype.allNestedComments=function(a){var b=[];a=a.getDescendants(!0);for(var c=0;c<a.length;c++){var d=a[c].getCommentText();d&&b.push(d)}b.length&&b.push("");return b.join("\n")};
-Blockly.Generator.prototype.blockToCode=function(a){if(!a)return"";if(a.disabled)return this.blockToCode(a.getNextBlock());var b=this[a.type];if("function"!=typeof b)throw Error('Language "'+this.name_+'" does not know how to generate  code for block type "'+a.type+'".');b=b.call(a,a);if(Array.isArray(b)){if(!a.outputConnection)throw TypeError("Expecting string from statement block: "+a.type);return[this.scrub_(a,b[0]),b[1]]}if("string"==typeof b){var c=a.id.replace(/\$/g,"$$$$");this.STATEMENT_PREFIX&&
-(b=this.STATEMENT_PREFIX.replace(/%1/g,"'"+c+"'")+b);return this.scrub_(a,b)}if(null===b)return"";throw SyntaxError("Invalid code generated: "+b);};
+Blockly.Generator.prototype.blockToCode=function(a,b){if(!a)return"";if(a.disabled)return b?"":this.blockToCode(a.getNextBlock());var c=this[a.type];if("function"!=typeof c)throw Error('Language "'+this.name_+'" does not know how to generate  code for block type "'+a.type+'".');c=c.call(a,a);if(Array.isArray(c)){if(!a.outputConnection)throw TypeError("Expecting string from statement block: "+a.type);return[this.scrub_(a,c[0],b),c[1]]}if("string"==typeof c){var d=a.id.replace(/\$/g,"$$$$");this.STATEMENT_PREFIX&&
+(c=this.STATEMENT_PREFIX.replace(/%1/g,"'"+d+"'")+c);return this.scrub_(a,c,b)}if(null===c)return"";throw SyntaxError("Invalid code generated: "+c);};
 Blockly.Generator.prototype.valueToCode=function(a,b,c){if(isNaN(c))throw TypeError("Expecting valid order from block: "+a.type);var d=a.getInputTargetBlock(b);if(!d)return"";b=this.blockToCode(d);if(""===b)return"";if(!Array.isArray(b))throw TypeError("Expecting tuple from value block: "+d.type);a=b[0];b=b[1];if(isNaN(b))throw TypeError("Expecting valid order from value block: "+d.type);if(!a)return"";d=!1;var e=Math.floor(c),f=Math.floor(b);if(e<=f&&(e!=f||0!=e&&99!=e))for(d=!0,e=0;e<this.ORDER_OVERRIDES.length;e++)if(this.ORDER_OVERRIDES[e][0]==
 c&&this.ORDER_OVERRIDES[e][1]==b){d=!1;break}d&&(a="("+a+")");return a};Blockly.Generator.prototype.statementToCode=function(a,b){var c=a.getInputTargetBlock(b),d=this.blockToCode(c);if("string"!=typeof d)throw TypeError("Expecting code from statement block: "+(c&&c.type));d&&(d=this.prefixLines(d,this.INDENT));return d};
 Blockly.Generator.prototype.addLoopTrap=function(a,b){b=b.replace(/\$/g,"$$$$");this.INFINITE_LOOP_TRAP&&(a=this.INFINITE_LOOP_TRAP.replace(/%1/g,"'"+b+"'")+a);this.STATEMENT_PREFIX&&(a+=this.prefixLines(this.STATEMENT_PREFIX.replace(/%1/g,"'"+b+"'"),this.INDENT));return a};Blockly.Generator.prototype.RESERVED_WORDS_="";Blockly.Generator.prototype.addReservedWords=function(a){this.RESERVED_WORDS_+=a+","};Blockly.Generator.prototype.FUNCTION_NAME_PLACEHOLDER_="{leCUI8hutHZI4480Dc}";
@@ -1616,7 +1626,7 @@ Blockly.Flyout.prototype.createBlock=function(a){var b=null;Blockly.Events.disab
 this.autoClose?this.hide():this.filterForCapacity_();return b};Blockly.Flyout.prototype.initFlyoutButton_=function(a,b,c){var d=a.createDom();a.moveTo(b,c);a.show();this.listeners_.push(Blockly.bindEventWithChecks_(d,"mousedown",this,this.onMouseDown_));this.buttons_.push(a)};
 Blockly.Flyout.prototype.createRect_=function(a,b,c,d,e){b=Blockly.utils.createSvgElement("rect",{"fill-opacity":0,x:b,y:c,height:d.height,width:d.width},null);b.tooltip=a;Blockly.Tooltip.bindMouseEvents(b);this.workspace_.getCanvas().insertBefore(b,a.getSvgRoot());a.flyoutRect_=b;return this.mats_[e]=b};
 Blockly.Flyout.prototype.moveRectToBlock_=function(a,b){var c=b.getHeightWidth();a.setAttribute("width",c.width);a.setAttribute("height",c.height);var d=b.startHat_?Blockly.BlockSvg.START_HAT_HEIGHT:0;d&&b.moveBy(0,d);d=b.outputConnection?Blockly.BlockSvg.TAB_WIDTH:0;var e=b.getRelativeToSurfaceXY();a.setAttribute("y",e.y);a.setAttribute("x",this.RTL?e.x-c.width+d:e.x-d)};
-Blockly.Flyout.prototype.filterForCapacity_=function(){for(var a=this.targetWorkspace_.remainingCapacity(),b=this.workspace_.getTopBlocks(!1),c=0,d;d=b[c];c++)if(-1==this.permanentlyDisabled_.indexOf(d)){var e=d.getDescendants(!1);d.setDisabled(e.length>a)}};Blockly.Flyout.prototype.reflow=function(){this.reflowWrapper_&&this.workspace_.removeChangeListener(this.reflowWrapper_);this.reflowInternal_();this.reflowWrapper_&&this.workspace_.addChangeListener(this.reflowWrapper_)};
+Blockly.Flyout.prototype.filterForCapacity_=function(){for(var a=this.workspace_.getTopBlocks(!1),b=0,c;c=a[b];b++)-1==this.permanentlyDisabled_.indexOf(c)&&c.setDisabled(!this.targetWorkspace_.isCapacityAvailable(Blockly.utils.getBlockTypeCounts(c)))};Blockly.Flyout.prototype.reflow=function(){this.reflowWrapper_&&this.workspace_.removeChangeListener(this.reflowWrapper_);this.reflowInternal_();this.reflowWrapper_&&this.workspace_.addChangeListener(this.reflowWrapper_)};
 Blockly.Flyout.prototype.isScrollable=function(){return this.scrollbar_?this.scrollbar_.isVisible():!1};
 Blockly.Flyout.prototype.placeNewBlock_=function(a){var b=this.targetWorkspace_;if(!a.getSvgRoot())throw Error("oldBlock is not rendered.");var c=Blockly.Xml.blockToDom(a);b.setResizesEnabled(!1);c=Blockly.Xml.domToBlock(c,b);if(!c.getSvgRoot())throw Error("block is not rendered.");var d=b.getOriginOffsetInPixels(),e=this.workspace_.getOriginOffsetInPixels();a=a.getRelativeToSurfaceXY().scale(this.workspace_.scale);a=goog.math.Coordinate.sum(e,a);b=goog.math.Coordinate.difference(a,d).scale(1/b.scale);
 c.moveBy(b.x,b.y);return c};Blockly.HorizontalFlyout=function(a){a.getMetrics=this.getMetrics_.bind(this);a.setMetrics=this.setMetrics_.bind(this);Blockly.HorizontalFlyout.superClass_.constructor.call(this,a);this.horizontalLayout_=!0};goog.inherits(Blockly.HorizontalFlyout,Blockly.Flyout);
@@ -1667,25 +1677,26 @@ Blockly.Css.CONTENT=[".blocklySvg {","background-color: #fff;","outline: none;",
 "color: #000;","display: none;","font-family: sans-serif;","font-size: 9pt;","opacity: .9;","padding: 2px;","position: absolute;","z-index: 100000;","}",".blocklyResizeSE {","cursor: se-resize;","fill: #aaa;","}",".blocklyResizeSW {","cursor: sw-resize;","fill: #aaa;","}",".blocklyResizeLine {","stroke: #515A5A;","stroke-width: 1;","}",".blocklyHighlightedConnectionPath {","fill: none;","stroke: #fc3;","stroke-width: 4px;","}",".blocklyPathLight {","fill: none;","stroke-linecap: round;","stroke-width: 1;",
 "}",".blocklySelected>.blocklyPath {","stroke: #fc3;","stroke-width: 3px;","}",".blocklySelected>.blocklyPathLight {","display: none;","}",".blocklyDraggable {",'cursor: url("<<<PATH>>>/handopen.cur"), auto;',"cursor: grab;","cursor: -webkit-grab;","}",".blocklyDragging {",'cursor: url("<<<PATH>>>/handclosed.cur"), auto;',"cursor: grabbing;","cursor: -webkit-grabbing;","}",".blocklyDraggable:active {",'cursor: url("<<<PATH>>>/handclosed.cur"), auto;',"cursor: grabbing;","cursor: -webkit-grabbing;",
 "}",".blocklyBlockDragSurface .blocklyDraggable {",'cursor: url("<<<PATH>>>/handclosed.cur"), auto;',"cursor: grabbing;","cursor: -webkit-grabbing;","}",".blocklyDragging.blocklyDraggingDelete {",'cursor: url("<<<PATH>>>/handdelete.cur"), auto;',"}",".blocklyToolboxDelete {",'cursor: url("<<<PATH>>>/handdelete.cur"), auto;',"}",".blocklyToolboxGrab {",'cursor: url("<<<PATH>>>/handclosed.cur"), auto;',"cursor: grabbing;","cursor: -webkit-grabbing;","}",".blocklyDragging>.blocklyPath,",".blocklyDragging>.blocklyPathLight {",
-"fill-opacity: .8;","stroke-opacity: .8;","}",".blocklyDragging>.blocklyPathDark {","display: none;","}",".blocklyDisabled>.blocklyPath {","fill-opacity: .5;","stroke-opacity: .5;","}",".blocklyDisabled>.blocklyPathLight,",".blocklyDisabled>.blocklyPathDark {","display: none;","}",".blocklyText {","cursor: default;","fill: #fff;","font-family: sans-serif;","font-size: 11pt;","}",".blocklyNonEditableText>text {","pointer-events: none;","}",".blocklyNonEditableText>rect,",".blocklyEditableText>rect {",
-"fill: #fff;","fill-opacity: .6;","}",".blocklyNonEditableText>text,",".blocklyEditableText>text {","fill: #000;","}",".blocklyEditableText:hover>rect {","stroke: #fff;","stroke-width: 2;","}",".blocklyBubbleText {","fill: #000;","}",".blocklyFlyout {","position: absolute;","z-index: 20;","}",".blocklyFlyoutButton {","fill: #888;","cursor: default;","}",".blocklyFlyoutButtonShadow {","fill: #666;","}",".blocklyFlyoutButton:hover {","fill: #aaa;","}",".blocklyFlyoutLabel {","cursor: default;","}",
-".blocklyFlyoutLabelBackground {","opacity: 0;","}",".blocklyFlyoutLabelText {","fill: #000;","}",".blocklySvg text, .blocklyBlockDragSurface text {","user-select: none;","-moz-user-select: none;","-ms-user-select: none;","-webkit-user-select: none;","cursor: inherit;","}",".blocklyHidden {","display: none;","}",".blocklyFieldDropdown:not(.blocklyHidden) {","display: block;","}",".blocklyIconGroup {","cursor: default;","}",".blocklyIconGroup:not(:hover),",".blocklyIconGroupReadonly {","opacity: .6;",
-"}",".blocklyIconShape {","fill: #00f;","stroke: #fff;","stroke-width: 1px;","}",".blocklyIconSymbol {","fill: #fff;","}",".blocklyMinimalBody {","margin: 0;","padding: 0;","}",".blocklyCommentForeignObject {","position: relative;","z-index: 0;","}",".blocklyCommentRect {","fill: #E7DE8E;","stroke: #bcA903;","stroke-width: 1px","}",".blocklyCommentTarget {","fill: transparent;","stroke: #bcA903;","}",".blocklyCommentTargetFocused {","fill: none;","}",".blocklyCommentHandleTarget {","fill: none;",
-"}",".blocklyCommentHandleTargetFocused {","fill: transparent;","}",".blocklyFocused>.blocklyCommentRect {","fill: #B9B272;","stroke: #B9B272;","}",".blocklySelected>.blocklyCommentTarget {","stroke: #fc3;","stroke-width: 3px;","}",".blocklyCommentTextarea {","background-color: #fef49c;","border: 0;","outline: 0;","margin: 0;","padding: 3px;","resize: none;","display: block;","overflow: hidden;","}",".blocklyCommentDeleteIcon {","cursor: pointer;","fill: #000;","display: none","}",".blocklySelected > .blocklyCommentDeleteIcon {",
-"display: block","}",".blocklyDeleteIconShape {","fill: #000;","stroke: #000;","stroke-width: 1px;","}",".blocklyDeleteIconShape.blocklyDeleteIconHighlighted {","stroke: #fc3;","}",".blocklyHtmlInput {","border: none;","border-radius: 4px;","font-family: sans-serif;","height: 100%;","margin: 0;","outline: none;","padding: 0 1px;","width: 100%","}",".blocklyMainBackground {","stroke-width: 1;","stroke: #c6c6c6;","}",".blocklyMutatorBackground {","fill: #fff;","stroke: #ddd;","stroke-width: 1;","}",
-".blocklyFlyoutBackground {","fill: #ddd;","fill-opacity: .8;","}",".blocklyTransparentBackground {","opacity: 0;","}",".blocklyMainWorkspaceScrollbar {","z-index: 20;","}",".blocklyFlyoutScrollbar {","z-index: 30;","}",".blocklyScrollbarHorizontal, .blocklyScrollbarVertical {","position: absolute;","outline: none;","}",".blocklyScrollbarBackground {","opacity: 0;","}",".blocklyScrollbarHandle {","fill: #ccc;","}",".blocklyScrollbarBackground:hover+.blocklyScrollbarHandle,",".blocklyScrollbarHandle:hover {",
-"fill: #bbb;","}",".blocklyZoom>image {","opacity: .4;","}",".blocklyZoom>image:hover {","opacity: .6;","}",".blocklyZoom>image:active {","opacity: .8;","}",".blocklyFlyout .blocklyScrollbarHandle {","fill: #bbb;","}",".blocklyFlyout .blocklyScrollbarBackground:hover+.blocklyScrollbarHandle,",".blocklyFlyout .blocklyScrollbarHandle:hover {","fill: #aaa;","}",".blocklyInvalidInput {","background: #faa;","}",".blocklyAngleCircle {","stroke: #444;","stroke-width: 1;","fill: #ddd;","fill-opacity: .8;",
-"}",".blocklyAngleMarks {","stroke: #444;","stroke-width: 1;","}",".blocklyAngleGauge {","fill: #f88;","fill-opacity: .8;","}",".blocklyAngleLine {","stroke: #f00;","stroke-width: 2;","stroke-linecap: round;","pointer-events: none;","}",".blocklyContextMenu {","border-radius: 4px;","}",".blocklyDropdownMenu {","padding: 0 !important;","}",".blocklyWidgetDiv .goog-option-selected .goog-menuitem-checkbox,",".blocklyWidgetDiv .goog-option-selected .goog-menuitem-icon {","background: url(<<<PATH>>>/sprites.png) no-repeat -48px -16px !important;",
-"}",".blocklyToolboxDiv {","background-color: #ddd;","overflow-x: visible;","overflow-y: auto;","position: absolute;","user-select: none;","-moz-user-select: none;","-ms-user-select: none;","-webkit-user-select: none;","z-index: 70;","-webkit-tap-highlight-color: transparent;","}",".blocklyTreeRoot {","padding: 4px 0;","}",".blocklyTreeRoot:focus {","outline: none;","}",".blocklyTreeRow {","height: 22px;","line-height: 22px;","margin-bottom: 3px;","padding-right: 8px;","white-space: nowrap;","}",
-".blocklyHorizontalTree {","float: left;","margin: 1px 5px 8px 0;","}",".blocklyHorizontalTreeRtl {","float: right;","margin: 1px 0 8px 5px;","}",'.blocklyToolboxDiv[dir="RTL"] .blocklyTreeRow {',"margin-left: 8px;","}",".blocklyTreeRow:not(.blocklyTreeSelected):hover {","background-color: #e4e4e4;","}",".blocklyTreeSeparator {","border-bottom: solid #e5e5e5 1px;","height: 0;","margin: 5px 0;","}",".blocklyTreeSeparatorHorizontal {","border-right: solid #e5e5e5 1px;","width: 0;","padding: 5px 0;",
-"margin: 0 5px;","}",".blocklyTreeIcon {","background-image: url(<<<PATH>>>/sprites.png);","height: 16px;","vertical-align: middle;","width: 16px;","}",".blocklyTreeIconClosedLtr {","background-position: -32px -1px;","}",".blocklyTreeIconClosedRtl {","background-position: 0 -1px;","}",".blocklyTreeIconOpen {","background-position: -16px -1px;","}",".blocklyTreeSelected>.blocklyTreeIconClosedLtr {","background-position: -32px -17px;","}",".blocklyTreeSelected>.blocklyTreeIconClosedRtl {","background-position: 0 -17px;",
-"}",".blocklyTreeSelected>.blocklyTreeIconOpen {","background-position: -16px -17px;","}",".blocklyTreeIconNone,",".blocklyTreeSelected>.blocklyTreeIconNone {","background-position: -48px -1px;","}",".blocklyTreeLabel {","cursor: default;","font-family: sans-serif;","font-size: 16px;","padding: 0 3px;","vertical-align: middle;","}",".blocklyToolboxDelete .blocklyTreeLabel {",'cursor: url("<<<PATH>>>/handdelete.cur"), auto;',"}",".blocklyTreeSelected .blocklyTreeLabel {","color: #fff;","}",".blocklyColourTable {",
-"border-collapse: collapse;","}",".blocklyColourTable>tr>td {","border: 1px solid #666;","padding: 0;","}",".blocklyColourTable>tr>td>div {","border: 1px solid #666;","height: 13px;","width: 15px;","}",".blocklyColourTable>tr>td>div:hover {","border: 1px solid #fff;","}",".blocklyColourSelected, .blocklyColourSelected:hover {","border: 1px solid #000 !important;","}",".blocklyWidgetDiv .goog-menu {","background: #fff;","border-color: #ccc #666 #666 #ccc;","border-style: solid;","border-width: 1px;",
-"cursor: default;","font: normal 13px Arial, sans-serif;","margin: 0;","outline: none;","padding: 4px 0;","position: absolute;","overflow-y: auto;","overflow-x: hidden;","max-height: 100%;","z-index: 20000;","}",".blocklyWidgetDiv .goog-menuitem {","color: #000;","font: normal 13px Arial, sans-serif;","list-style: none;","margin: 0;","padding: 4px 7em 4px 28px;","white-space: nowrap;","}",".blocklyWidgetDiv .goog-menuitem.goog-menuitem-rtl {","padding-left: 7em;","padding-right: 28px;","}",".blocklyWidgetDiv .goog-menu-nocheckbox .goog-menuitem,",
-".blocklyWidgetDiv .goog-menu-noicon .goog-menuitem {","padding-left: 12px;","}",".blocklyWidgetDiv .goog-menu-noaccel .goog-menuitem {","padding-right: 20px;","}",".blocklyWidgetDiv .goog-menuitem-content {","color: #000;","font: normal 13px Arial, sans-serif;","}",".blocklyWidgetDiv .goog-menuitem-disabled .goog-menuitem-accel,",".blocklyWidgetDiv .goog-menuitem-disabled .goog-menuitem-content {","color: #ccc !important;","}",".blocklyWidgetDiv .goog-menuitem-disabled .goog-menuitem-icon {","opacity: 0.3;",
-"filter: alpha(opacity=30);","}",".blocklyWidgetDiv .goog-menuitem-highlight,",".blocklyWidgetDiv .goog-menuitem-hover {","background-color: #d6e9f8;","border-color: #d6e9f8;","border-style: dotted;","border-width: 1px 0;","padding-bottom: 3px;","padding-top: 3px;","}",".blocklyWidgetDiv .goog-menuitem-checkbox,",".blocklyWidgetDiv .goog-menuitem-icon {","background-repeat: no-repeat;","height: 16px;","left: 6px;","position: absolute;","right: auto;","vertical-align: middle;","width: 16px;","}",".blocklyWidgetDiv .goog-menuitem-rtl .goog-menuitem-checkbox,",
-".blocklyWidgetDiv .goog-menuitem-rtl .goog-menuitem-icon {","left: auto;","right: 6px;","}",".blocklyWidgetDiv .goog-option-selected .goog-menuitem-checkbox,",".blocklyWidgetDiv .goog-option-selected .goog-menuitem-icon {","background: url(//ssl.gstatic.com/editor/editortoolbar.png) no-repeat -512px 0;","}",".blocklyWidgetDiv .goog-menuitem-accel {","color: #999;","direction: ltr;","left: auto;","padding: 0 6px;","position: absolute;","right: 0;","text-align: right;","}",".blocklyWidgetDiv .goog-menuitem-rtl .goog-menuitem-accel {",
-"left: 0;","right: auto;","text-align: left;","}",".blocklyWidgetDiv .goog-menuitem-mnemonic-hint {","text-decoration: underline;","}",".blocklyWidgetDiv .goog-menuitem-mnemonic-separator {","color: #999;","font-size: 12px;","padding-left: 4px;","}",".blocklyWidgetDiv .goog-menuseparator {","border-top: 1px solid #ccc;","margin: 4px 0;","padding: 0;","}",""];Blockly.WidgetDiv={};Blockly.WidgetDiv.DIV=null;Blockly.WidgetDiv.owner_=null;Blockly.WidgetDiv.dispose_=null;Blockly.WidgetDiv.createDom=function(){Blockly.WidgetDiv.DIV||(Blockly.WidgetDiv.DIV=document.createElement("div"),Blockly.WidgetDiv.DIV.className="blocklyWidgetDiv",document.body.appendChild(Blockly.WidgetDiv.DIV))};
+"fill-opacity: .8;","stroke-opacity: .8;","}",".blocklyDragging>.blocklyPathDark {","display: none;","}",".blocklyDisabled>.blocklyPath {","fill-opacity: .5;","stroke-opacity: .5;","}",".blocklyDisabled>.blocklyPathLight,",".blocklyDisabled>.blocklyPathDark {","display: none;","}",".blocklyInsertionMarker>.blocklyPath,",".blocklyInsertionMarker>.blocklyPathLight,",".blocklyInsertionMarker>.blocklyPathDark {","fill-opacity: .2;","stroke: none","}",".blocklyReplaceable .blocklyPath {","fill-opacity: 0.5;",
+"}",".blocklyReplaceable .blocklyPathLight,",".blocklyReplaceable .blocklyPathDark {","display: none;","}",".blocklyText {","cursor: default;","fill: #fff;","font-family: sans-serif;","font-size: 11pt;","}",".blocklyNonEditableText>text {","pointer-events: none;","}",".blocklyNonEditableText>rect,",".blocklyEditableText>rect {","fill: #fff;","fill-opacity: .6;","}",".blocklyNonEditableText>text,",".blocklyEditableText>text {","fill: #000;","}",".blocklyEditableText:hover>rect {","stroke: #fff;","stroke-width: 2;",
+"}",".blocklyBubbleText {","fill: #000;","}",".blocklyFlyout {","position: absolute;","z-index: 20;","}",".blocklyFlyoutButton {","fill: #888;","cursor: default;","}",".blocklyFlyoutButtonShadow {","fill: #666;","}",".blocklyFlyoutButton:hover {","fill: #aaa;","}",".blocklyFlyoutLabel {","cursor: default;","}",".blocklyFlyoutLabelBackground {","opacity: 0;","}",".blocklyFlyoutLabelText {","fill: #000;","}",".blocklySvg text, .blocklyBlockDragSurface text {","user-select: none;","-moz-user-select: none;",
+"-ms-user-select: none;","-webkit-user-select: none;","cursor: inherit;","}",".blocklyHidden {","display: none;","}",".blocklyFieldDropdown:not(.blocklyHidden) {","display: block;","}",".blocklyIconGroup {","cursor: default;","}",".blocklyIconGroup:not(:hover),",".blocklyIconGroupReadonly {","opacity: .6;","}",".blocklyIconShape {","fill: #00f;","stroke: #fff;","stroke-width: 1px;","}",".blocklyIconSymbol {","fill: #fff;","}",".blocklyMinimalBody {","margin: 0;","padding: 0;","}",".blocklyCommentForeignObject {",
+"position: relative;","z-index: 0;","}",".blocklyCommentRect {","fill: #E7DE8E;","stroke: #bcA903;","stroke-width: 1px","}",".blocklyCommentTarget {","fill: transparent;","stroke: #bcA903;","}",".blocklyCommentTargetFocused {","fill: none;","}",".blocklyCommentHandleTarget {","fill: none;","}",".blocklyCommentHandleTargetFocused {","fill: transparent;","}",".blocklyFocused>.blocklyCommentRect {","fill: #B9B272;","stroke: #B9B272;","}",".blocklySelected>.blocklyCommentTarget {","stroke: #fc3;","stroke-width: 3px;",
+"}",".blocklyCommentTextarea {","background-color: #fef49c;","border: 0;","outline: 0;","margin: 0;","padding: 3px;","resize: none;","display: block;","overflow: hidden;","}",".blocklyCommentDeleteIcon {","cursor: pointer;","fill: #000;","display: none","}",".blocklySelected > .blocklyCommentDeleteIcon {","display: block","}",".blocklyDeleteIconShape {","fill: #000;","stroke: #000;","stroke-width: 1px;","}",".blocklyDeleteIconShape.blocklyDeleteIconHighlighted {","stroke: #fc3;","}",".blocklyHtmlInput {",
+"border: none;","border-radius: 4px;","font-family: sans-serif;","height: 100%;","margin: 0;","outline: none;","padding: 0 1px;","width: 100%","}",".blocklyMainBackground {","stroke-width: 1;","stroke: #c6c6c6;","}",".blocklyMutatorBackground {","fill: #fff;","stroke: #ddd;","stroke-width: 1;","}",".blocklyFlyoutBackground {","fill: #ddd;","fill-opacity: .8;","}",".blocklyTransparentBackground {","opacity: 0;","}",".blocklyMainWorkspaceScrollbar {","z-index: 20;","}",".blocklyFlyoutScrollbar {","z-index: 30;",
+"}",".blocklyScrollbarHorizontal, .blocklyScrollbarVertical {","position: absolute;","outline: none;","}",".blocklyScrollbarBackground {","opacity: 0;","}",".blocklyScrollbarHandle {","fill: #ccc;","}",".blocklyScrollbarBackground:hover+.blocklyScrollbarHandle,",".blocklyScrollbarHandle:hover {","fill: #bbb;","}",".blocklyZoom>image, .blocklyZoom>svg>image {","opacity: .4;","}",".blocklyZoom>image:hover, .blocklyZoom>svg>image:hover {","opacity: .6;","}",".blocklyZoom>image:active, .blocklyZoom>svg>image:active {",
+"opacity: .8;","}",".blocklyFlyout .blocklyScrollbarHandle {","fill: #bbb;","}",".blocklyFlyout .blocklyScrollbarBackground:hover+.blocklyScrollbarHandle,",".blocklyFlyout .blocklyScrollbarHandle:hover {","fill: #aaa;","}",".blocklyInvalidInput {","background: #faa;","}",".blocklyAngleCircle {","stroke: #444;","stroke-width: 1;","fill: #ddd;","fill-opacity: .8;","}",".blocklyAngleMarks {","stroke: #444;","stroke-width: 1;","}",".blocklyAngleGauge {","fill: #f88;","fill-opacity: .8;","}",".blocklyAngleLine {",
+"stroke: #f00;","stroke-width: 2;","stroke-linecap: round;","pointer-events: none;","}",".blocklyContextMenu {","border-radius: 4px;","}",".blocklyDropdownMenu {","padding: 0 !important;","}",".blocklyWidgetDiv .goog-option-selected .goog-menuitem-checkbox,",".blocklyWidgetDiv .goog-option-selected .goog-menuitem-icon {","background: url(<<<PATH>>>/sprites.png) no-repeat -48px -16px !important;","}",".blocklyToolboxDiv {","background-color: #ddd;","overflow-x: visible;","overflow-y: auto;","position: absolute;",
+"user-select: none;","-moz-user-select: none;","-ms-user-select: none;","-webkit-user-select: none;","z-index: 70;","-webkit-tap-highlight-color: transparent;","}",".blocklyTreeRoot {","padding: 4px 0;","}",".blocklyTreeRoot:focus {","outline: none;","}",".blocklyTreeRow {","height: 22px;","line-height: 22px;","margin-bottom: 3px;","padding-right: 8px;","white-space: nowrap;","}",".blocklyHorizontalTree {","float: left;","margin: 1px 5px 8px 0;","}",".blocklyHorizontalTreeRtl {","float: right;","margin: 1px 0 8px 5px;",
+"}",'.blocklyToolboxDiv[dir="RTL"] .blocklyTreeRow {',"margin-left: 8px;","}",".blocklyTreeRow:not(.blocklyTreeSelected):hover {","background-color: #e4e4e4;","}",".blocklyTreeSeparator {","border-bottom: solid #e5e5e5 1px;","height: 0;","margin: 5px 0;","}",".blocklyTreeSeparatorHorizontal {","border-right: solid #e5e5e5 1px;","width: 0;","padding: 5px 0;","margin: 0 5px;","}",".blocklyTreeIcon {","background-image: url(<<<PATH>>>/sprites.png);","height: 16px;","vertical-align: middle;","width: 16px;",
+"}",".blocklyTreeIconClosedLtr {","background-position: -32px -1px;","}",".blocklyTreeIconClosedRtl {","background-position: 0 -1px;","}",".blocklyTreeIconOpen {","background-position: -16px -1px;","}",".blocklyTreeSelected>.blocklyTreeIconClosedLtr {","background-position: -32px -17px;","}",".blocklyTreeSelected>.blocklyTreeIconClosedRtl {","background-position: 0 -17px;","}",".blocklyTreeSelected>.blocklyTreeIconOpen {","background-position: -16px -17px;","}",".blocklyTreeIconNone,",".blocklyTreeSelected>.blocklyTreeIconNone {",
+"background-position: -48px -1px;","}",".blocklyTreeLabel {","cursor: default;","font-family: sans-serif;","font-size: 16px;","padding: 0 3px;","vertical-align: middle;","}",".blocklyToolboxDelete .blocklyTreeLabel {",'cursor: url("<<<PATH>>>/handdelete.cur"), auto;',"}",".blocklyTreeSelected .blocklyTreeLabel {","color: #fff;","}",".blocklyColourTable {","border-collapse: collapse;","}",".blocklyColourTable>tr>td {","border: 1px solid #666;","padding: 0;","}",".blocklyColourTable>tr>td>div {","border: 1px solid #666;",
+"height: 13px;","width: 15px;","}",".blocklyColourTable>tr>td>div:hover {","border: 1px solid #fff;","}",".blocklyColourSelected, .blocklyColourSelected:hover {","border: 1px solid #000 !important;","}",".blocklyWidgetDiv .goog-menu {","background: #fff;","border-color: #ccc #666 #666 #ccc;","border-style: solid;","border-width: 1px;","cursor: default;","font: normal 13px Arial, sans-serif;","margin: 0;","outline: none;","padding: 4px 0;","position: absolute;","overflow-y: auto;","overflow-x: hidden;",
+"max-height: 100%;","z-index: 20000;","}",".blocklyWidgetDiv .goog-menuitem {","color: #000;","font: normal 13px Arial, sans-serif;","list-style: none;","margin: 0;","padding: 4px 7em 4px 28px;","white-space: nowrap;","}",".blocklyWidgetDiv .goog-menuitem.goog-menuitem-rtl {","padding-left: 7em;","padding-right: 28px;","}",".blocklyWidgetDiv .goog-menu-nocheckbox .goog-menuitem,",".blocklyWidgetDiv .goog-menu-noicon .goog-menuitem {","padding-left: 12px;","}",".blocklyWidgetDiv .goog-menu-noaccel .goog-menuitem {",
+"padding-right: 20px;","}",".blocklyWidgetDiv .goog-menuitem-content {","color: #000;","font: normal 13px Arial, sans-serif;","}",".blocklyWidgetDiv .goog-menuitem-disabled .goog-menuitem-accel,",".blocklyWidgetDiv .goog-menuitem-disabled .goog-menuitem-content {","color: #ccc !important;","}",".blocklyWidgetDiv .goog-menuitem-disabled .goog-menuitem-icon {","opacity: 0.3;","filter: alpha(opacity=30);","}",".blocklyWidgetDiv .goog-menuitem-highlight,",".blocklyWidgetDiv .goog-menuitem-hover {","background-color: #d6e9f8;",
+"border-color: #d6e9f8;","border-style: dotted;","border-width: 1px 0;","padding-bottom: 3px;","padding-top: 3px;","}",".blocklyWidgetDiv .goog-menuitem-checkbox,",".blocklyWidgetDiv .goog-menuitem-icon {","background-repeat: no-repeat;","height: 16px;","left: 6px;","position: absolute;","right: auto;","vertical-align: middle;","width: 16px;","}",".blocklyWidgetDiv .goog-menuitem-rtl .goog-menuitem-checkbox,",".blocklyWidgetDiv .goog-menuitem-rtl .goog-menuitem-icon {","left: auto;","right: 6px;",
+"}",".blocklyWidgetDiv .goog-option-selected .goog-menuitem-checkbox,",".blocklyWidgetDiv .goog-option-selected .goog-menuitem-icon {","background: url(//ssl.gstatic.com/editor/editortoolbar.png) no-repeat -512px 0;","}",".blocklyWidgetDiv .goog-menuitem-accel {","color: #999;","direction: ltr;","left: auto;","padding: 0 6px;","position: absolute;","right: 0;","text-align: right;","}",".blocklyWidgetDiv .goog-menuitem-rtl .goog-menuitem-accel {","left: 0;","right: auto;","text-align: left;","}",".blocklyWidgetDiv .goog-menuitem-mnemonic-hint {",
+"text-decoration: underline;","}",".blocklyWidgetDiv .goog-menuitem-mnemonic-separator {","color: #999;","font-size: 12px;","padding-left: 4px;","}",".blocklyWidgetDiv .goog-menuseparator {","border-top: 1px solid #ccc;","margin: 4px 0;","padding: 0;","}",""];Blockly.WidgetDiv={};Blockly.WidgetDiv.DIV=null;Blockly.WidgetDiv.owner_=null;Blockly.WidgetDiv.dispose_=null;Blockly.WidgetDiv.createDom=function(){Blockly.WidgetDiv.DIV||(Blockly.WidgetDiv.DIV=document.createElement("div"),Blockly.WidgetDiv.DIV.className="blocklyWidgetDiv",document.body.appendChild(Blockly.WidgetDiv.DIV))};
 Blockly.WidgetDiv.show=function(a,b,c){Blockly.WidgetDiv.hide();Blockly.WidgetDiv.owner_=a;Blockly.WidgetDiv.dispose_=c;a=goog.style.getViewportPageOffset(document);Blockly.WidgetDiv.DIV.style.top=a.y+"px";Blockly.WidgetDiv.DIV.style.direction=b?"rtl":"ltr";Blockly.WidgetDiv.DIV.style.display="block"};
 Blockly.WidgetDiv.hide=function(){Blockly.WidgetDiv.owner_&&(Blockly.WidgetDiv.owner_=null,Blockly.WidgetDiv.DIV.style.display="none",Blockly.WidgetDiv.DIV.style.left="",Blockly.WidgetDiv.DIV.style.top="",Blockly.WidgetDiv.dispose_&&Blockly.WidgetDiv.dispose_(),Blockly.WidgetDiv.dispose_=null,Blockly.WidgetDiv.DIV.innerHTML="")};Blockly.WidgetDiv.isVisible=function(){return!!Blockly.WidgetDiv.owner_};Blockly.WidgetDiv.hideIfOwner=function(a){Blockly.WidgetDiv.owner_==a&&Blockly.WidgetDiv.hide()};
 Blockly.WidgetDiv.position=function(a,b,c,d,e){b<d.y&&(b=d.y);e?a>c.width+d.x&&(a=c.width+d.x):a<d.x&&(a=d.x);Blockly.WidgetDiv.positionInternal_(a,b,c.height)};Blockly.WidgetDiv.positionInternal_=function(a,b,c){Blockly.WidgetDiv.DIV.style.left=a+"px";Blockly.WidgetDiv.DIV.style.top=b+"px";Blockly.WidgetDiv.DIV.style.height=c+"px"};
@@ -1694,20 +1705,20 @@ Blockly.init_(c);Blockly.mainWorkspace=c;Blockly.svgResize(c);return c};
 Blockly.createDom_=function(a,b){a.setAttribute("dir","LTR");goog.ui.Component.setDefaultRightToLeft(b.RTL);Blockly.Css.inject(b.hasCss,b.pathToMedia);var c=Blockly.utils.createSvgElement("svg",{xmlns:"http://www.w3.org/2000/svg","xmlns:html":"http://www.w3.org/1999/xhtml","xmlns:xlink":"http://www.w3.org/1999/xlink",version:"1.1","class":"blocklySvg"},a),d=Blockly.utils.createSvgElement("defs",{},c),e=String(Math.random()).substring(2),f=Blockly.utils.createSvgElement("filter",{id:"blocklyEmbossFilter"+
 e},d);Blockly.utils.createSvgElement("feGaussianBlur",{"in":"SourceAlpha",stdDeviation:1,result:"blur"},f);var g=Blockly.utils.createSvgElement("feSpecularLighting",{"in":"blur",surfaceScale:1,specularConstant:.5,specularExponent:10,"lighting-color":"white",result:"specOut"},f);Blockly.utils.createSvgElement("fePointLight",{x:-5E3,y:-1E4,z:2E4},g);Blockly.utils.createSvgElement("feComposite",{"in":"specOut",in2:"SourceAlpha",operator:"in",result:"specOut"},f);Blockly.utils.createSvgElement("feComposite",
 {"in":"SourceGraphic",in2:"specOut",operator:"arithmetic",k1:0,k2:1,k3:1,k4:0},f);b.embossFilterId=f.id;f=Blockly.utils.createSvgElement("pattern",{id:"blocklyDisabledPattern"+e,patternUnits:"userSpaceOnUse",width:10,height:10},d);Blockly.utils.createSvgElement("rect",{width:10,height:10,fill:"#aaa"},f);Blockly.utils.createSvgElement("path",{d:"M 0 0 L 10 10 M 10 0 L 0 10",stroke:"#cc0"},f);b.disabledPatternId=f.id;b.gridPattern=Blockly.Grid.createDom(e,b.gridOptions,d);return c};
-Blockly.createMainWorkspace_=function(a,b,c,d){b.parentWorkspace=null;var e=new Blockly.WorkspaceSvg(b,c,d);e.scale=b.zoomOptions.startScale;a.appendChild(e.createDom("blocklyMainBackground"));!b.hasCategories&&b.languageTree&&(c=e.addFlyout_("svg"),Blockly.utils.insertAfter(c,a));e.translate(0,0);Blockly.mainWorkspace=e;b.readOnly||b.hasScrollbars||e.addChangeListener(function(){if(!e.isDragging()){var a=e.getMetrics(),c=a.viewLeft+a.absoluteLeft,d=a.viewTop+a.absoluteTop;if(a.contentTop<d||a.contentTop+
-a.contentHeight>a.viewHeight+d||a.contentLeft<(b.RTL?a.viewLeft:c)||a.contentLeft+a.contentWidth>(b.RTL?a.viewWidth:a.viewWidth+c))for(var k=e.getTopBlocks(!1),l=0,n;n=k[l];l++){var m=n.getRelativeToSurfaceXY(),p=n.getHeightWidth(),q=d+25-p.height-m.y;0<q&&n.moveBy(0,q);q=d+a.viewHeight-25-m.y;0>q&&n.moveBy(0,q);q=25+c-m.x-(b.RTL?0:p.width);0<q&&n.moveBy(q,0);m=c+a.viewWidth-25-m.x+(b.RTL?p.width:0);0>m&&n.moveBy(m,0)}}});Blockly.svgResize(e);Blockly.WidgetDiv.createDom();Blockly.Tooltip.createDom();
-return e};
-Blockly.init_=function(a){var b=a.options,c=a.getParentSvg();Blockly.bindEventWithChecks_(c.parentNode,"contextmenu",null,function(a){Blockly.utils.isTargetInput(a)||a.preventDefault()});c=Blockly.bindEventWithChecks_(window,"resize",null,function(){Blockly.hideChaff(!0);Blockly.svgResize(a)});a.setResizeHandlerWrapper(c);Blockly.inject.bindDocumentEvents_();b.languageTree&&(a.toolbox_?a.toolbox_.init(a):a.flyout_&&(a.flyout_.init(a),a.flyout_.show(b.languageTree.childNodes),a.flyout_.scrollToStart(),a.scrollX=
-a.flyout_.width_,b.toolboxPosition==Blockly.TOOLBOX_AT_RIGHT&&(a.scrollX*=-1),a.translate(a.scrollX,0)));b.hasScrollbars&&(a.scrollbar=new Blockly.ScrollbarPair(a),a.scrollbar.resize());b.hasSounds&&Blockly.inject.loadSounds_(b.pathToMedia,a)};
+Blockly.createMainWorkspace_=function(a,b,c,d){b.parentWorkspace=null;var e=new Blockly.WorkspaceSvg(b,c,d);e.scale=b.zoomOptions.startScale;a.appendChild(e.createDom("blocklyMainBackground"));!b.hasCategories&&b.languageTree&&(c=e.addFlyout_("svg"),Blockly.utils.insertAfter(c,a));e.translate(0,0);Blockly.mainWorkspace=e;b.readOnly||b.hasScrollbars||e.addChangeListener(function(a){if(!e.isDragging()){var c=e.getMetrics(),d=c.viewLeft+c.absoluteLeft,f=c.viewTop+c.absoluteTop;if(c.contentTop<f||c.contentTop+
+c.contentHeight>c.viewHeight+f||c.contentLeft<(b.RTL?c.viewLeft:d)||c.contentLeft+c.contentWidth>(b.RTL?c.viewWidth:c.viewWidth+d)){var l=e.getTopBlocks(!1),n=null;a&&(n=Blockly.Events.getGroup(),Blockly.Events.setGroup(a.group));for(var m=!1,p=0,q;q=l[p];p++){var r=q.getRelativeToSurfaceXY(),t=q.getHeightWidth(),u=f+25-t.height-r.y;0<u&&(q.moveBy(0,u),m=!0);u=f+c.viewHeight-25-r.y;0>u&&(q.moveBy(0,u),m=!0);u=25+d-r.x-(b.RTL?0:t.width);0<u&&(q.moveBy(u,0),m=!0);r=d+c.viewWidth-25-r.x+(b.RTL?t.width:
+0);0>r&&(q.moveBy(r,0),m=!0)}a&&(!a.group&&m&&console.log("WARNING: Moved blocks in bounds but there was no event group. This may break undo."),Blockly.Events.setGroup(n))}}});Blockly.svgResize(e);Blockly.WidgetDiv.createDom();Blockly.Tooltip.createDom();return e};
+Blockly.init_=function(a){var b=a.options,c=a.getParentSvg();Blockly.bindEventWithChecks_(c.parentNode,"contextmenu",null,function(a){Blockly.utils.isTargetInput(a)||a.preventDefault()});c=Blockly.bindEventWithChecks_(window,"resize",null,function(){Blockly.hideChaff(!0);Blockly.svgResize(a)});a.setResizeHandlerWrapper(c);Blockly.inject.bindDocumentEvents_();b.languageTree&&(a.toolbox_?a.toolbox_.init(a):a.flyout_&&(a.flyout_.init(a),a.flyout_.show(b.languageTree.childNodes),a.flyout_.scrollToStart(),
+a.scrollX=a.flyout_.width_,b.toolboxPosition==Blockly.TOOLBOX_AT_RIGHT&&(a.scrollX*=-1),a.translate(a.scrollX,0)));b.hasScrollbars&&(a.scrollbar=new Blockly.ScrollbarPair(a),a.scrollbar.resize());b.hasSounds&&Blockly.inject.loadSounds_(b.pathToMedia,a)};
 Blockly.inject.bindDocumentEvents_=function(){Blockly.documentEventsBound_||(Blockly.bindEventWithChecks_(document,"keydown",null,Blockly.onKeyDown_),Blockly.bindEvent_(document,"touchend",null,Blockly.longStop_),Blockly.bindEvent_(document,"touchcancel",null,Blockly.longStop_),goog.userAgent.IPAD&&Blockly.bindEventWithChecks_(window,"orientationchange",document,function(){Blockly.svgResize(Blockly.getMainWorkspace())}));Blockly.documentEventsBound_=!0};
 Blockly.inject.loadSounds_=function(a,b){var c=b.getAudioManager();c.load([a+"click.mp3",a+"click.wav",a+"click.ogg"],"click");c.load([a+"disconnect.wav",a+"disconnect.mp3",a+"disconnect.ogg"],"disconnect");c.load([a+"delete.mp3",a+"delete.ogg",a+"delete.wav"],"delete");var d=[],e=function(){for(;d.length;)Blockly.unbindEvent_(d.pop());c.preload()};d.push(Blockly.bindEventWithChecks_(document,"mousemove",null,e,!0));d.push(Blockly.bindEventWithChecks_(document,"touchstart",null,e,!0))};
-Blockly.updateToolbox=function(a){console.warn("Deprecated call to Blockly.updateToolbox, use workspace.updateToolbox instead.");Blockly.getMainWorkspace().updateToolbox(a)};var CLOSURE_DEFINES={"goog.DEBUG":!1};Blockly.mainWorkspace=null;Blockly.selected=null;Blockly.draggingConnections_=[];Blockly.clipboardXml_=null;Blockly.clipboardSource_=null;Blockly.cache3dSupported_=null;Blockly.hueToRgb=function(a){return goog.color.hsvToHex(a,Blockly.HSV_SATURATION,255*Blockly.HSV_VALUE)};Blockly.svgSize=function(a){return{width:a.cachedWidth_,height:a.cachedHeight_}};Blockly.resizeSvgContents=function(a){a.resizeContents()};
+Blockly.updateToolbox=function(a){console.warn("Deprecated call to Blockly.updateToolbox, use workspace.updateToolbox instead.");Blockly.getMainWorkspace().updateToolbox(a)};var CLOSURE_DEFINES={"goog.DEBUG":!1};Blockly.mainWorkspace=null;Blockly.selected=null;Blockly.draggingConnections_=[];Blockly.clipboardXml_=null;Blockly.clipboardSource_=null;Blockly.clipboardTypeCounts_=null;Blockly.cache3dSupported_=null;Blockly.hueToRgb=function(a){return goog.color.hsvToHex(a,Blockly.HSV_SATURATION,255*Blockly.HSV_VALUE)};Blockly.svgSize=function(a){return{width:a.cachedWidth_,height:a.cachedHeight_}};Blockly.resizeSvgContents=function(a){a.resizeContents()};
 Blockly.svgResize=function(a){for(;a.options.parentWorkspace;)a=a.options.parentWorkspace;var b=a.getParentSvg(),c=b.parentNode;if(c){var d=c.offsetWidth;c=c.offsetHeight;b.cachedWidth_!=d&&(b.setAttribute("width",d+"px"),b.cachedWidth_=d);b.cachedHeight_!=c&&(b.setAttribute("height",c+"px"),b.cachedHeight_=c);a.resize()}};
 Blockly.onKeyDown_=function(a){var b=Blockly.mainWorkspace;if(!(b.options.readOnly||Blockly.utils.isTargetInput(a)||b.rendered&&!b.isVisible())){var c=!1;if(27==a.keyCode)Blockly.hideChaff();else if(8==a.keyCode||46==a.keyCode){a.preventDefault();if(b.isDragging())return;Blockly.selected&&Blockly.selected.isDeletable()&&(c=!0)}else if(a.altKey||a.ctrlKey||a.metaKey){if(b.isDragging())return;Blockly.selected&&Blockly.selected.isDeletable()&&Blockly.selected.isMovable()&&(67==a.keyCode?(Blockly.hideChaff(),
-Blockly.copy_(Blockly.selected)):88!=a.keyCode||Blockly.selected.workspace.isFlyout||(Blockly.copy_(Blockly.selected),c=!0));86==a.keyCode?Blockly.clipboardXml_&&(Blockly.Events.setGroup(!0),b=Blockly.clipboardSource_,b.isFlyout&&(b=b.targetWorkspace),b.paste(Blockly.clipboardXml_),Blockly.Events.setGroup(!1)):90==a.keyCode&&(Blockly.hideChaff(),b.undo(a.shiftKey))}c&&!Blockly.selected.workspace.isFlyout&&(Blockly.Events.setGroup(!0),Blockly.hideChaff(),Blockly.selected.dispose(!0,!0),Blockly.Events.setGroup(!1))}};
-Blockly.copy_=function(a){if(a.isComment)var b=a.toXmlWithXY();else{b=Blockly.Xml.blockToDom(a);Blockly.Xml.deleteNext(b);var c=a.getRelativeToSurfaceXY();b.setAttribute("x",a.RTL?-c.x:c.x);b.setAttribute("y",c.y)}Blockly.clipboardXml_=b;Blockly.clipboardSource_=a.workspace};Blockly.duplicate_=function(a){var b=Blockly.clipboardXml_,c=Blockly.clipboardSource_;Blockly.copy_(a);a.workspace.paste(Blockly.clipboardXml_);Blockly.clipboardXml_=b;Blockly.clipboardSource_=c};
-Blockly.onContextMenu_=function(a){Blockly.utils.isTargetInput(a)||a.preventDefault()};Blockly.hideChaff=function(a){Blockly.Tooltip.hide();Blockly.WidgetDiv.hide();a||(a=Blockly.getMainWorkspace(),a.toolbox_&&a.toolbox_.flyout_&&a.toolbox_.flyout_.autoClose&&a.toolbox_.clearSelection())};Blockly.addChangeListener=function(a){console.warn("Deprecated call to Blockly.addChangeListener, use workspace.addChangeListener instead.");return Blockly.getMainWorkspace().addChangeListener(a)};
-Blockly.getMainWorkspace=function(){return Blockly.mainWorkspace};Blockly.alert=function(a,b){window.alert(a);b&&b()};Blockly.confirm=function(a,b){b(window.confirm(a))};Blockly.prompt=function(a,b,c){c(window.prompt(a,b))};Blockly.jsonInitFactory_=function(a){return function(){this.jsonInit(a)}};
+Blockly.copy_(Blockly.selected)):88!=a.keyCode||Blockly.selected.workspace.isFlyout||(Blockly.copy_(Blockly.selected),c=!0));86==a.keyCode?Blockly.clipboardXml_&&(b=Blockly.clipboardSource_,b.isFlyout&&(b=b.targetWorkspace),Blockly.clipboardTypeCounts_&&b.isCapacityAvailable(Blockly.clipboardTypeCounts_)&&(Blockly.Events.setGroup(!0),b.paste(Blockly.clipboardXml_),Blockly.Events.setGroup(!1))):90==a.keyCode&&(Blockly.hideChaff(),b.undo(a.shiftKey))}c&&!Blockly.selected.workspace.isFlyout&&(Blockly.Events.setGroup(!0),
+Blockly.hideChaff(),Blockly.selected.dispose(!0,!0),Blockly.Events.setGroup(!1))}};Blockly.copy_=function(a){if(a.isComment)var b=a.toXmlWithXY();else{b=Blockly.Xml.blockToDom(a);Blockly.Xml.deleteNext(b);var c=a.getRelativeToSurfaceXY();b.setAttribute("x",a.RTL?-c.x:c.x);b.setAttribute("y",c.y)}Blockly.clipboardXml_=b;Blockly.clipboardSource_=a.workspace;Blockly.clipboardTypeCounts_=a.isComment?null:Blockly.utils.getBlockTypeCounts(a,!0)};
+Blockly.duplicate_=function(a){var b=Blockly.clipboardXml_,c=Blockly.clipboardSource_;Blockly.copy_(a);a.workspace.paste(Blockly.clipboardXml_);Blockly.clipboardXml_=b;Blockly.clipboardSource_=c};Blockly.onContextMenu_=function(a){Blockly.utils.isTargetInput(a)||a.preventDefault()};Blockly.hideChaff=function(a){Blockly.Tooltip.hide();Blockly.WidgetDiv.hide();a||(a=Blockly.getMainWorkspace(),a.toolbox_&&a.toolbox_.flyout_&&a.toolbox_.flyout_.autoClose&&a.toolbox_.clearSelection())};
+Blockly.addChangeListener=function(a){console.warn("Deprecated call to Blockly.addChangeListener, use workspace.addChangeListener instead.");return Blockly.getMainWorkspace().addChangeListener(a)};Blockly.getMainWorkspace=function(){return Blockly.mainWorkspace};Blockly.alert=function(a,b){window.alert(a);b&&b()};Blockly.confirm=function(a,b){b(window.confirm(a))};Blockly.prompt=function(a,b,c){c(window.prompt(a,b))};Blockly.jsonInitFactory_=function(a){return function(){this.jsonInit(a)}};
 Blockly.defineBlocksWithJsonArray=function(a){for(var b=0;b<a.length;b++){var c=a[b];if(c){var d=c.type;null==d||""===d?console.warn("Block definition #"+b+" in JSON array is missing a type attribute. Skipping."):(Blockly.Blocks[d]&&console.warn("Block definition #"+b+' in JSON array overwrites prior definition of "'+d+'".'),Blockly.Blocks[d]={init:Blockly.jsonInitFactory_(c)})}else console.warn("Block definition #"+b+" in JSON array is "+c+". Skipping.")}};
 Blockly.bindEventWithChecks_=function(a,b,c,d,e,f){var g=!1,h=function(a){var b=!e;a=Blockly.Touch.splitEventByTouches(a);for(var f=0,h;h=a[f];f++)if(!b||Blockly.Touch.shouldHandleEvent(h))Blockly.Touch.setClientFromTouch(h),c?d.call(c,h):d(h),g=!0},k=[];if(goog.global.PointerEvent&&b in Blockly.Touch.TOUCH_MAP)for(var l=0,n;n=Blockly.Touch.TOUCH_MAP[b][l];l++)a.addEventListener(n,h,!1),k.push([a,n,h]);else if(a.addEventListener(b,h,!1),k.push([a,b,h]),b in Blockly.Touch.TOUCH_MAP){var m=function(a){h(a);
 var b=!f;g&&b&&a.preventDefault()};for(l=0;n=Blockly.Touch.TOUCH_MAP[b][l];l++)a.addEventListener(n,m,!1),k.push([a,n,m])}return k};
diff --git a/blockly_uncompressed.js b/blockly_uncompressed.js
index 9b82fb1fe..e035da4c1 100644
--- a/blockly_uncompressed.js
+++ b/blockly_uncompressed.js
@@ -37,7 +37,7 @@ this.BLOCKLY_BOOT = function(root) {
 goog.addDependency("../../../" + dir + "/core/block.js", ['Blockly.Block'], ['Blockly.Blocks', 'Blockly.Comment', 'Blockly.Connection', 'Blockly.Events.BlockChange', 'Blockly.Events.BlockCreate', 'Blockly.Events.BlockDelete', 'Blockly.Events.BlockMove', 'Blockly.Extensions', 'Blockly.Input', 'Blockly.Mutator', 'Blockly.utils', 'Blockly.Warning', 'Blockly.Workspace', 'goog.math.Coordinate']);
 goog.addDependency("../../../" + dir + "/core/block_animations.js", ['Blockly.BlockAnimations'], ['Blockly.utils']);
 goog.addDependency("../../../" + dir + "/core/block_drag_surface.js", ['Blockly.BlockDragSurfaceSvg'], ['Blockly.utils', 'goog.math.Coordinate']);
-goog.addDependency("../../../" + dir + "/core/block_dragger.js", ['Blockly.BlockDragger'], ['Blockly.BlockAnimations', 'Blockly.DraggedConnectionManager', 'Blockly.Events.BlockMove', 'goog.math.Coordinate']);
+goog.addDependency("../../../" + dir + "/core/block_dragger.js", ['Blockly.BlockDragger'], ['Blockly.BlockAnimations', 'Blockly.InsertionMarkerManager', 'Blockly.Events.BlockMove', 'goog.math.Coordinate']);
 goog.addDependency("../../../" + dir + "/core/block_events.js", ['Blockly.Events.BlockBase', 'Blockly.Events.BlockChange', 'Blockly.Events.BlockCreate', 'Blockly.Events.BlockDelete', 'Blockly.Events.BlockMove', 'Blockly.Events.Change', 'Blockly.Events.Create', 'Blockly.Events.Delete', 'Blockly.Events.Move'], ['Blockly.Events', 'Blockly.Events.Abstract', 'Blockly.Xml.utils', 'goog.math.Coordinate']);
 goog.addDependency("../../../" + dir + "/core/block_render_svg.js", ['Blockly.BlockSvg.render'], ['Blockly.BlockSvg']);
 goog.addDependency("../../../" + dir + "/core/block_svg.js", ['Blockly.BlockSvg'], ['Blockly.Block', 'Blockly.BlockAnimations', 'Blockly.ContextMenu', 'Blockly.Events.Ui', 'Blockly.Events.BlockMove', 'Blockly.Grid', 'Blockly.RenderedConnection', 'Blockly.Tooltip', 'Blockly.Touch', 'Blockly.utils', 'goog.color', 'goog.math.Coordinate']);
diff --git a/blocks/procedures.js b/blocks/procedures.js
index 7c7e6529e..c19ec0618 100644
--- a/blocks/procedures.js
+++ b/blocks/procedures.js
@@ -80,26 +80,11 @@ Blockly.Blocks['procedures_defnoreturn'] = {
   },
   /**
    * Update the display of parameters for this procedure definition block.
-   * Display a warning if there are duplicately named parameters.
    * @private
    * @this Blockly.Block
    */
   updateParams_: function() {
-    // Check for duplicated arguments.
-    var badArg = false;
-    var hash = {};
-    for (var i = 0; i < this.arguments_.length; i++) {
-      if (hash['arg_' + this.arguments_[i].toLowerCase()]) {
-        badArg = true;
-        break;
-      }
-      hash['arg_' + this.arguments_[i].toLowerCase()] = true;
-    }
-    if (badArg) {
-      this.setWarningText(Blockly.Msg['PROCEDURES_DEF_DUPLICATE_WARNING']);
-    } else {
-      this.setWarningText(null);
-    }
+
     // Merge the arguments into a human-readable list.
     var paramString = '';
     if (this.arguments_.length) {
@@ -159,7 +144,11 @@ Blockly.Blocks['procedures_defnoreturn'] = {
         this.arguments_.push(varName);
         var variable = Blockly.Variables.getOrCreateVariablePackage(
             this.workspace, varId, varName, '');
-        this.argumentVarModels_.push(variable);
+        if (variable != null) {
+          this.argumentVarModels_.push(variable);
+        } else {
+          console.log('Failed to create a variable with name ' + varName + ', ignoring.');
+        }
       }
     }
     this.updateParams_();
@@ -216,7 +205,12 @@ Blockly.Blocks['procedures_defnoreturn'] = {
       var varName = paramBlock.getFieldValue('NAME');
       this.arguments_.push(varName);
       var variable = this.workspace.getVariable(varName, '');
-      this.argumentVarModels_.push(variable);
+      if (variable != null) {
+        this.argumentVarModels_.push(variable);
+      } else {
+        console.log('Failed to get variable named ' + varName + ', ignoring.');
+      }
+
       this.paramIds_.push(paramBlock.id);
       paramBlock = paramBlock.nextConnection &&
           paramBlock.nextConnection.targetBlock();
@@ -465,9 +459,72 @@ Blockly.Blocks['procedures_mutatorcontainer'] = {
     this.setStyle('procedure_blocks');
     this.setTooltip(Blockly.Msg['PROCEDURES_MUTATORCONTAINER_TOOLTIP']);
     this.contextMenu = false;
+  },
+  /**
+   * This will create & delete variables and in dialogs workspace to ensure
+   * that when a new block is dragged out it will have a unique parameter name.
+   * @param {!Blockly.Events.Abstract} event Change event.
+   * @this Blockly.Block
+   */
+  onchange: function(event) {
+    if (!this.workspace || this.workspace.isFlyout ||
+        (event.type != Blockly.Events.BLOCK_DELETE && event.type != Blockly.Events.BLOCK_CREATE)) {
+      return;
+    }
+    var blocks = this.workspace.getAllBlocks();
+    var allVariables = this.workspace.getAllVariables();
+    if (event.type == Blockly.Events.BLOCK_DELETE) {
+      var variableNamesToKeep = [];
+      for (var i = 0; i < blocks.length; i += 1) {
+        if (blocks[i].getFieldValue('NAME')) {
+          variableNamesToKeep.push(blocks[i].getFieldValue('NAME'));
+        }
+      }
+      for (var k = 0; k < allVariables.length; k += 1) {
+        if (variableNamesToKeep.indexOf(allVariables[k].name) == -1) {
+          this.workspace.deleteVariableById(allVariables[k].getId());
+        }
+      }
+      return;
+    }
+      
+    if (event.type != Blockly.Events.BLOCK_CREATE) {
+      return;
+    }
+
+    var block = this.workspace.getBlockById(event.blockId);
+    // This is to handle the one none variable block
+    // Happens when all the blocks are regenerated
+    if (!block.getField('NAME')) {
+      return;
+    }
+    var varName = block.getFieldValue('NAME');
+    var variable = this.workspace.getVariable(varName);
+
+    if (!variable) {
+      // This means the parameter name is not in use and we can create the variable.
+      variable = this.workspace.createVariable(varName);
+    }
+    // If the blocks are connected we don't have to check duplicate variables
+    // This only happens if the dialog box is open
+    if (block.previousConnection.isConnected() || block.nextConnection.isConnected()) {
+      return;
+    }
+
+    for (var j = 0; j < blocks.length; j += 1) {
+      // filter block that was created
+      if (block.id != blocks[j].id && blocks[j].getFieldValue('NAME') == variable.name) {
+        // generate new name and set name field
+        varName = Blockly.Variables.generateUniqueName(this.workspace);
+        variable = this.workspace.createVariable(varName);
+        block.setFieldValue(variable.name, 'NAME');
+        return;
+      }
+    }
   }
 };
 
+
 Blockly.Blocks['procedures_mutatorarg'] = {
   /**
    * Mutator block for procedure argument.
@@ -501,6 +558,7 @@ Blockly.Blocks['procedures_mutatorarg'] = {
     field.createdVariables_ = [];
     field.onFinishEditing_('x');
   },
+
   /**
    * Obtain a valid name for the procedure argument. Create a variable if
    * necessary.
@@ -517,6 +575,16 @@ Blockly.Blocks['procedures_mutatorarg'] = {
     if (!varName) {
       return null;
     }
+    // Prevents duplicate parameter names in functions
+    var blocks = this.sourceBlock_.workspace.getAllBlocks();
+    for (var i = 0; i < blocks.length; i += 1) {
+      if (blocks[i].id == this.sourceBlock_.id) {
+        continue;
+      }
+      if (blocks[i].getFieldValue('NAME') == varName) {
+        return null;
+      }
+    }
     var model = outerWs.getVariable(varName, '');
     if (model && model.name != varName) {
       // Rename the variable (case change)
diff --git a/blocks_compressed.js b/blocks_compressed.js
index 3d8c32e15..b05fd9508 100644
--- a/blocks_compressed.js
+++ b/blocks_compressed.js
@@ -33,7 +33,7 @@ this.removeInput("ORDINAL",!0);a?(this.appendValueInput("AT").setCheck("Number")
 Blockly.Blocks.lists_getSublist={init:function(){this.WHERE_OPTIONS_1=[[Blockly.Msg.LISTS_GET_SUBLIST_START_FROM_START,"FROM_START"],[Blockly.Msg.LISTS_GET_SUBLIST_START_FROM_END,"FROM_END"],[Blockly.Msg.LISTS_GET_SUBLIST_START_FIRST,"FIRST"]];this.WHERE_OPTIONS_2=[[Blockly.Msg.LISTS_GET_SUBLIST_END_FROM_START,"FROM_START"],[Blockly.Msg.LISTS_GET_SUBLIST_END_FROM_END,"FROM_END"],[Blockly.Msg.LISTS_GET_SUBLIST_END_LAST,"LAST"]];this.setHelpUrl(Blockly.Msg.LISTS_GET_SUBLIST_HELPURL);this.setColour(Blockly.Msg.LISTS_HUE);
 this.appendValueInput("LIST").setCheck("Array").appendField(Blockly.Msg.LISTS_GET_SUBLIST_INPUT_IN_LIST);this.appendDummyInput("AT1");this.appendDummyInput("AT2");Blockly.Msg.LISTS_GET_SUBLIST_TAIL&&this.appendDummyInput("TAIL").appendField(Blockly.Msg.LISTS_GET_SUBLIST_TAIL);this.setInputsInline(!0);this.setOutput(!0,"Array");this.updateAt_(1,!0);this.updateAt_(2,!0);this.setTooltip(Blockly.Msg.LISTS_GET_SUBLIST_TOOLTIP)},mutationToDom:function(){var a=document.createElement("mutation"),b=this.getInput("AT1").type==
 Blockly.INPUT_VALUE;a.setAttribute("at1",b);b=this.getInput("AT2").type==Blockly.INPUT_VALUE;a.setAttribute("at2",b);return a},domToMutation:function(a){var b="true"==a.getAttribute("at1");a="true"==a.getAttribute("at2");this.updateAt_(1,b);this.updateAt_(2,a)},updateAt_:function(a,b){this.removeInput("AT"+a);this.removeInput("ORDINAL"+a,!0);b?(this.appendValueInput("AT"+a).setCheck("Number"),Blockly.Msg.ORDINAL_NUMBER_SUFFIX&&this.appendDummyInput("ORDINAL"+a).appendField(Blockly.Msg.ORDINAL_NUMBER_SUFFIX)):
-this.appendDummyInput("AT"+a);var c=new Blockly.FieldDropdown(this["WHERE_OPTIONS_"+a],function(c){var e="FROM_START"==c||"FROM_END"==c;if(e!=b){var d=this.sourceBlock_;d.updateAt_(a,e);d.setFieldValue(c,"WHERE"+a);return null}});this.getInput("AT"+a).appendField(c,"WHERE"+a);1==a&&(this.moveInputBefore("AT1","AT2"),this.getInput("ORDINAL1")&&this.moveInputBefore("ORDINAL1","AT2"));Blockly.Msg.LISTS_GET_SUBLIST_TAIL&&this.moveInputBefore("TAIL",null)}};
+this.appendDummyInput("AT"+a);var c=new Blockly.FieldDropdown(this["WHERE_OPTIONS_"+a],function(c){var d="FROM_START"==c||"FROM_END"==c;if(d!=b){var f=this.sourceBlock_;f.updateAt_(a,d);f.setFieldValue(c,"WHERE"+a);return null}});this.getInput("AT"+a).appendField(c,"WHERE"+a);1==a&&(this.moveInputBefore("AT1","AT2"),this.getInput("ORDINAL1")&&this.moveInputBefore("ORDINAL1","AT2"));Blockly.Msg.LISTS_GET_SUBLIST_TAIL&&this.moveInputBefore("TAIL",null)}};
 Blockly.Blocks.lists_sort={init:function(){this.jsonInit({message0:Blockly.Msg.LISTS_SORT_TITLE,args0:[{type:"field_dropdown",name:"TYPE",options:[[Blockly.Msg.LISTS_SORT_TYPE_NUMERIC,"NUMERIC"],[Blockly.Msg.LISTS_SORT_TYPE_TEXT,"TEXT"],[Blockly.Msg.LISTS_SORT_TYPE_IGNORECASE,"IGNORE_CASE"]]},{type:"field_dropdown",name:"DIRECTION",options:[[Blockly.Msg.LISTS_SORT_ORDER_ASCENDING,"1"],[Blockly.Msg.LISTS_SORT_ORDER_DESCENDING,"-1"]]},{type:"input_value",name:"LIST",check:"Array"}],output:"Array",colour:Blockly.Msg.LISTS_HUE,
 tooltip:Blockly.Msg.LISTS_SORT_TOOLTIP,helpUrl:Blockly.Msg.LISTS_SORT_HELPURL})}};
 Blockly.Blocks.lists_split={init:function(){var a=this,b=new Blockly.FieldDropdown([[Blockly.Msg.LISTS_SPLIT_LIST_FROM_TEXT,"SPLIT"],[Blockly.Msg.LISTS_SPLIT_TEXT_FROM_LIST,"JOIN"]],function(b){a.updateType_(b)});this.setHelpUrl(Blockly.Msg.LISTS_SPLIT_HELPURL);this.setColour(Blockly.Msg.LISTS_HUE);this.appendValueInput("INPUT").setCheck("String").appendField(b,"MODE");this.appendValueInput("DELIM").setCheck("String").appendField(Blockly.Msg.LISTS_SPLIT_WITH_DELIMITER);this.setInputsInline(!0);this.setOutput(!0,
@@ -48,11 +48,12 @@ message2:"%{BKY_LOGIC_TERNARY_IF_FALSE} %1",args2:[{type:"input_value",name:"ELS
 Blockly.defineBlocksWithJsonArray([{type:"controls_if_if",message0:"%{BKY_CONTROLS_IF_IF_TITLE_IF}",nextStatement:null,enableContextMenu:!1,colour:"%{BKY_LOGIC_HUE}",tooltip:"%{BKY_CONTROLS_IF_IF_TOOLTIP}"},{type:"controls_if_elseif",message0:"%{BKY_CONTROLS_IF_ELSEIF_TITLE_ELSEIF}",previousStatement:null,nextStatement:null,enableContextMenu:!1,colour:"%{BKY_LOGIC_HUE}",tooltip:"%{BKY_CONTROLS_IF_ELSEIF_TOOLTIP}"},{type:"controls_if_else",message0:"%{BKY_CONTROLS_IF_ELSE_TITLE_ELSE}",previousStatement:null,
 enableContextMenu:!1,colour:"%{BKY_LOGIC_HUE}",tooltip:"%{BKY_CONTROLS_IF_ELSE_TOOLTIP}"}]);Blockly.Constants.Logic.TOOLTIPS_BY_OP={EQ:"%{BKY_LOGIC_COMPARE_TOOLTIP_EQ}",NEQ:"%{BKY_LOGIC_COMPARE_TOOLTIP_NEQ}",LT:"%{BKY_LOGIC_COMPARE_TOOLTIP_LT}",LTE:"%{BKY_LOGIC_COMPARE_TOOLTIP_LTE}",GT:"%{BKY_LOGIC_COMPARE_TOOLTIP_GT}",GTE:"%{BKY_LOGIC_COMPARE_TOOLTIP_GTE}",AND:"%{BKY_LOGIC_OPERATION_TOOLTIP_AND}",OR:"%{BKY_LOGIC_OPERATION_TOOLTIP_OR}"};
 Blockly.Extensions.register("logic_op_tooltip",Blockly.Extensions.buildTooltipForDropdown("OP",Blockly.Constants.Logic.TOOLTIPS_BY_OP));
-Blockly.Constants.Logic.CONTROLS_IF_MUTATOR_MIXIN={elseifCount_:0,elseCount_:0,mutationToDom:function(){if(!this.elseifCount_&&!this.elseCount_)return null;var a=document.createElement("mutation");this.elseifCount_&&a.setAttribute("elseif",this.elseifCount_);this.elseCount_&&a.setAttribute("else",1);return a},domToMutation:function(a){this.elseifCount_=parseInt(a.getAttribute("elseif"),10)||0;this.elseCount_=parseInt(a.getAttribute("else"),10)||0;this.updateShape_()},decompose:function(a){var b=a.newBlock("controls_if_if");
-b.initSvg();for(var c=b.nextConnection,d=1;d<=this.elseifCount_;d++){var e=a.newBlock("controls_if_elseif");e.initSvg();c.connect(e.previousConnection);c=e.nextConnection}this.elseCount_&&(a=a.newBlock("controls_if_else"),a.initSvg(),c.connect(a.previousConnection));return b},compose:function(a){var b=a.nextConnection.targetBlock();this.elseCount_=this.elseifCount_=0;a=[null];for(var c=[null],d=null;b;){switch(b.type){case "controls_if_elseif":this.elseifCount_++;a.push(b.valueConnection_);c.push(b.statementConnection_);
-break;case "controls_if_else":this.elseCount_++;d=b.statementConnection_;break;default:throw TypeError("Unknown block type: "+b.type);}b=b.nextConnection&&b.nextConnection.targetBlock()}this.updateShape_();for(b=1;b<=this.elseifCount_;b++)Blockly.Mutator.reconnect(a[b],this,"IF"+b),Blockly.Mutator.reconnect(c[b],this,"DO"+b);Blockly.Mutator.reconnect(d,this,"ELSE")},saveConnections:function(a){a=a.nextConnection.targetBlock();for(var b=1;a;){switch(a.type){case "controls_if_elseif":var c=this.getInput("IF"+
-b),d=this.getInput("DO"+b);a.valueConnection_=c&&c.connection.targetConnection;a.statementConnection_=d&&d.connection.targetConnection;b++;break;case "controls_if_else":d=this.getInput("ELSE");a.statementConnection_=d&&d.connection.targetConnection;break;default:throw TypeError("Unknown block type: "+a.type);}a=a.nextConnection&&a.nextConnection.targetBlock()}},updateShape_:function(){this.getInput("ELSE")&&this.removeInput("ELSE");for(var a=1;this.getInput("IF"+a);)this.removeInput("IF"+a),this.removeInput("DO"+
-a),a++;for(a=1;a<=this.elseifCount_;a++)this.appendValueInput("IF"+a).setCheck("Boolean").appendField(Blockly.Msg.CONTROLS_IF_MSG_ELSEIF),this.appendStatementInput("DO"+a).appendField(Blockly.Msg.CONTROLS_IF_MSG_THEN);this.elseCount_&&this.appendStatementInput("ELSE").appendField(Blockly.Msg.CONTROLS_IF_MSG_ELSE)}};Blockly.Extensions.registerMutator("controls_if_mutator",Blockly.Constants.Logic.CONTROLS_IF_MUTATOR_MIXIN,null,["controls_if_elseif","controls_if_else"]);
+Blockly.Constants.Logic.CONTROLS_IF_MUTATOR_MIXIN={elseifCount_:0,elseCount_:0,mutationToDom:function(){if(!this.elseifCount_&&!this.elseCount_)return null;var a=document.createElement("mutation");this.elseifCount_&&a.setAttribute("elseif",this.elseifCount_);this.elseCount_&&a.setAttribute("else",1);return a},domToMutation:function(a){this.elseifCount_=parseInt(a.getAttribute("elseif"),10)||0;this.elseCount_=parseInt(a.getAttribute("else"),10)||0;this.rebuildShape_()},decompose:function(a){var b=
+a.newBlock("controls_if_if");b.initSvg();for(var c=b.nextConnection,d=1;d<=this.elseifCount_;d++){var e=a.newBlock("controls_if_elseif");e.initSvg();c.connect(e.previousConnection);c=e.nextConnection}this.elseCount_&&(a=a.newBlock("controls_if_else"),a.initSvg(),c.connect(a.previousConnection));return b},compose:function(a){a=a.nextConnection.targetBlock();this.elseCount_=this.elseifCount_=0;for(var b=[null],c=[null],d=null;a;){switch(a.type){case "controls_if_elseif":this.elseifCount_++;b.push(a.valueConnection_);
+c.push(a.statementConnection_);break;case "controls_if_else":this.elseCount_++;d=a.statementConnection_;break;default:throw TypeError("Unknown block type: "+a.type);}a=a.nextConnection&&a.nextConnection.targetBlock()}this.updateShape_();this.reconnectChildBlocks_(b,c,d)},saveConnections:function(a){a=a.nextConnection.targetBlock();for(var b=1;a;){switch(a.type){case "controls_if_elseif":var c=this.getInput("IF"+b),d=this.getInput("DO"+b);a.valueConnection_=c&&c.connection.targetConnection;a.statementConnection_=
+d&&d.connection.targetConnection;b++;break;case "controls_if_else":d=this.getInput("ELSE");a.statementConnection_=d&&d.connection.targetConnection;break;default:throw TypeError("Unknown block type: "+a.type);}a=a.nextConnection&&a.nextConnection.targetBlock()}},rebuildShape_:function(){var a=[null],b=[null],c=null;this.getInput("ELSE")&&(c=this.getInput("ELSE").connection.targetConnection);for(var d=1;this.getInput("IF"+d);){var e=this.getInput("IF"+d),f=this.getInput("DO"+d);a.push(e.connection.targetConnection);
+b.push(f.connection.targetConnection);d++}this.updateShape_();this.reconnectChildBlocks_(a,b,c)},updateShape_:function(){this.getInput("ELSE")&&this.removeInput("ELSE");for(var a=1;this.getInput("IF"+a);)this.removeInput("IF"+a),this.removeInput("DO"+a),a++;for(a=1;a<=this.elseifCount_;a++)this.appendValueInput("IF"+a).setCheck("Boolean").appendField(Blockly.Msg.CONTROLS_IF_MSG_ELSEIF),this.appendStatementInput("DO"+a).appendField(Blockly.Msg.CONTROLS_IF_MSG_THEN);this.elseCount_&&this.appendStatementInput("ELSE").appendField(Blockly.Msg.CONTROLS_IF_MSG_ELSE)},
+reconnectChildBlocks_:function(a,b,c){for(var d=1;d<=this.elseifCount_;d++)Blockly.Mutator.reconnect(a[d],this,"IF"+d),Blockly.Mutator.reconnect(b[d],this,"DO"+d);Blockly.Mutator.reconnect(c,this,"ELSE")}};Blockly.Extensions.registerMutator("controls_if_mutator",Blockly.Constants.Logic.CONTROLS_IF_MUTATOR_MIXIN,null,["controls_if_elseif","controls_if_else"]);
 Blockly.Constants.Logic.CONTROLS_IF_TOOLTIP_EXTENSION=function(){this.setTooltip(function(){if(this.elseifCount_||this.elseCount_){if(!this.elseifCount_&&this.elseCount_)return Blockly.Msg.CONTROLS_IF_TOOLTIP_2;if(this.elseifCount_&&!this.elseCount_)return Blockly.Msg.CONTROLS_IF_TOOLTIP_3;if(this.elseifCount_&&this.elseCount_)return Blockly.Msg.CONTROLS_IF_TOOLTIP_4}else return Blockly.Msg.CONTROLS_IF_TOOLTIP_1;return""}.bind(this))};Blockly.Extensions.register("controls_if_tooltip",Blockly.Constants.Logic.CONTROLS_IF_TOOLTIP_EXTENSION);
 Blockly.Constants.Logic.LOGIC_COMPARE_ONCHANGE_MIXIN={onchange:function(a){this.prevBlocks_||(this.prevBlocks_=[null,null]);var b=this.getInputTargetBlock("A"),c=this.getInputTargetBlock("B");b&&c&&!b.outputConnection.checkType_(c.outputConnection)&&(Blockly.Events.setGroup(a.group),a=this.prevBlocks_[0],a!==b&&(b.unplug(),a&&!a.isShadow()&&this.getInput("A").connection.connect(a.outputConnection)),b=this.prevBlocks_[1],b!==c&&(c.unplug(),b&&!b.isShadow()&&this.getInput("B").connection.connect(b.outputConnection)),
 this.bumpNeighbours_(),Blockly.Events.setGroup(!1));this.prevBlocks_[0]=this.getInputTargetBlock("A");this.prevBlocks_[1]=this.getInputTargetBlock("B")}};Blockly.Constants.Logic.LOGIC_COMPARE_EXTENSION=function(){this.mixin(Blockly.Constants.Logic.LOGIC_COMPARE_ONCHANGE_MIXIN)};Blockly.Extensions.register("logic_compare",Blockly.Constants.Logic.LOGIC_COMPARE_EXTENSION);
@@ -91,13 +92,14 @@ Blockly.Blocks.procedures_defnoreturn={init:function(){var a=new Blockly.FieldTe
 this.setColour(Blockly.Msg.PROCEDURES_HUE);this.setTooltip(Blockly.Msg.PROCEDURES_DEFNORETURN_TOOLTIP);this.setHelpUrl(Blockly.Msg.PROCEDURES_DEFNORETURN_HELPURL);this.arguments_=[];this.argumentVarModels_=[];this.setStatements_(!0);this.statementConnection_=null},setStatements_:function(a){this.hasStatements_!==a&&(a?(this.appendStatementInput("STACK").appendField(Blockly.Msg.PROCEDURES_DEFNORETURN_DO),this.getInput("RETURN")&&this.moveInputBefore("STACK","RETURN")):this.removeInput("STACK",!0),
 this.hasStatements_=a)},updateParams_:function(){for(var a=!1,b={},c=0;c<this.arguments_.length;c++){if(b["arg_"+this.arguments_[c].toLowerCase()]){a=!0;break}b["arg_"+this.arguments_[c].toLowerCase()]=!0}a?this.setWarningText(Blockly.Msg.PROCEDURES_DEF_DUPLICATE_WARNING):this.setWarningText(null);a="";this.arguments_.length&&(a=Blockly.Msg.PROCEDURES_BEFORE_PARAMS+" "+this.arguments_.join(", "));Blockly.Events.disable();try{this.setFieldValue(a,"PARAMS")}finally{Blockly.Events.enable()}},mutationToDom:function(a){var b=
 document.createElement("mutation");a&&b.setAttribute("name",this.getFieldValue("NAME"));for(var c=0;c<this.argumentVarModels_.length;c++){var d=document.createElement("arg"),e=this.argumentVarModels_[c];d.setAttribute("name",e.name);d.setAttribute("varid",e.getId());a&&this.paramIds_&&d.setAttribute("paramId",this.paramIds_[c]);b.appendChild(d)}this.hasStatements_||b.setAttribute("statements","false");return b},domToMutation:function(a){this.arguments_=[];this.argumentVarModels_=[];for(var b=0,c;c=
-a.childNodes[b];b++)if("arg"==c.nodeName.toLowerCase()){var d=c.getAttribute("name");c=c.getAttribute("varid")||c.getAttribute("varId");this.arguments_.push(d);d=Blockly.Variables.getOrCreateVariablePackage(this.workspace,c,d,"");this.argumentVarModels_.push(d)}this.updateParams_();Blockly.Procedures.mutateCallers(this);this.setStatements_("false"!==a.getAttribute("statements"))},decompose:function(a){var b=a.newBlock("procedures_mutatorcontainer");b.initSvg();this.getInput("RETURN")?b.setFieldValue(this.hasStatements_?
-"TRUE":"FALSE","STATEMENTS"):b.getInput("STATEMENT_INPUT").setVisible(!1);for(var c=b.getInput("STACK").connection,d=0;d<this.arguments_.length;d++){var e=a.newBlock("procedures_mutatorarg");e.initSvg();e.setFieldValue(this.arguments_[d],"NAME");e.oldLocation=d;c.connect(e.previousConnection);c=e.nextConnection}Blockly.Procedures.mutateCallers(this);return b},compose:function(a){this.arguments_=[];this.paramIds_=[];this.argumentVarModels_=[];for(var b=a.getInputTargetBlock("STACK");b;){var c=b.getFieldValue("NAME");
-this.arguments_.push(c);c=this.workspace.getVariable(c,"");this.argumentVarModels_.push(c);this.paramIds_.push(b.id);b=b.nextConnection&&b.nextConnection.targetBlock()}this.updateParams_();Blockly.Procedures.mutateCallers(this);a=a.getFieldValue("STATEMENTS");if(null!==a&&(a="TRUE"==a,this.hasStatements_!=a))if(a)this.setStatements_(!0),Blockly.Mutator.reconnect(this.statementConnection_,this,"STACK"),this.statementConnection_=null;else{a=this.getInput("STACK").connection;if(this.statementConnection_=
-a.targetConnection)a=a.targetBlock(),a.unplug(),a.bumpNeighbours_();this.setStatements_(!1)}},getProcedureDef:function(){return[this.getFieldValue("NAME"),this.arguments_,!1]},getVars:function(){return this.arguments_},getVarModels:function(){return this.argumentVarModels_},renameVarById:function(a,b){var c=this.workspace.getVariableById(a);if(""==c.type){c=c.name;for(var d=this.workspace.getVariableById(b),e=!1,f=0;f<this.argumentVarModels_.length;f++)this.argumentVarModels_[f].getId()==a&&(this.arguments_[f]=
-d.name,this.argumentVarModels_[f]=d,e=!0);e&&this.displayRenamedVar_(c,d.name)}},updateVarName:function(a){for(var b=a.name,c=!1,d=0;d<this.argumentVarModels_.length;d++)if(this.argumentVarModels_[d].getId()==a.getId()){var e=this.arguments_[d];this.arguments_[d]=b;c=!0}c&&this.displayRenamedVar_(e,b)},displayRenamedVar_:function(a,b){this.updateParams_();if(this.mutator.isVisible())for(var c=this.mutator.workspace_.getAllBlocks(!1),d=0,e;e=c[d];d++)"procedures_mutatorarg"==e.type&&Blockly.Names.equals(a,
-e.getFieldValue("NAME"))&&e.setFieldValue(b,"NAME")},customContextMenu:function(a){if(!this.isInFlyout){var b={enabled:!0},c=this.getFieldValue("NAME");b.text=Blockly.Msg.PROCEDURES_CREATE_DO.replace("%1",c);var d=document.createElement("mutation");d.setAttribute("name",c);for(var e=0;e<this.arguments_.length;e++)c=document.createElement("arg"),c.setAttribute("name",this.arguments_[e]),d.appendChild(c);c=document.createElement("block");c.setAttribute("type",this.callType_);c.appendChild(d);b.callback=
-Blockly.ContextMenu.callbackFactory(this,c);a.push(b);if(!this.isCollapsed())for(e=0;e<this.argumentVarModels_.length;e++)b={enabled:!0},d=this.argumentVarModels_[e],c=d.name,b.text=Blockly.Msg.VARIABLES_SET_CREATE_GET.replace("%1",c),d=Blockly.Variables.generateVariableFieldDom(d),c=document.createElement("block"),c.setAttribute("type","variables_get"),c.appendChild(d),b.callback=Blockly.ContextMenu.callbackFactory(this,c),a.push(b)}},callType_:"procedures_callnoreturn"};
+a.childNodes[b];b++)if("arg"==c.nodeName.toLowerCase()){var d=c.getAttribute("name");c=c.getAttribute("varid")||c.getAttribute("varId");this.arguments_.push(d);c=Blockly.Variables.getOrCreateVariablePackage(this.workspace,c,d,"");null!=c?this.argumentVarModels_.push(c):console.log("Failed to create a variable with name "+d+", ignoring.")}this.updateParams_();Blockly.Procedures.mutateCallers(this);this.setStatements_("false"!==a.getAttribute("statements"))},decompose:function(a){var b=a.newBlock("procedures_mutatorcontainer");
+b.initSvg();this.getInput("RETURN")?b.setFieldValue(this.hasStatements_?"TRUE":"FALSE","STATEMENTS"):b.getInput("STATEMENT_INPUT").setVisible(!1);for(var c=b.getInput("STACK").connection,d=0;d<this.arguments_.length;d++){var e=a.newBlock("procedures_mutatorarg");e.initSvg();e.setFieldValue(this.arguments_[d],"NAME");e.oldLocation=d;c.connect(e.previousConnection);c=e.nextConnection}Blockly.Procedures.mutateCallers(this);return b},compose:function(a){this.arguments_=[];this.paramIds_=[];this.argumentVarModels_=
+[];for(var b=a.getInputTargetBlock("STACK");b;){var c=b.getFieldValue("NAME");this.arguments_.push(c);var d=this.workspace.getVariable(c,"");null!=d?this.argumentVarModels_.push(d):console.log("Failed to get variable named "+c+", ignoring.");this.paramIds_.push(b.id);b=b.nextConnection&&b.nextConnection.targetBlock()}this.updateParams_();Blockly.Procedures.mutateCallers(this);a=a.getFieldValue("STATEMENTS");if(null!==a&&(a="TRUE"==a,this.hasStatements_!=a))if(a)this.setStatements_(!0),Blockly.Mutator.reconnect(this.statementConnection_,
+this,"STACK"),this.statementConnection_=null;else{a=this.getInput("STACK").connection;if(this.statementConnection_=a.targetConnection)a=a.targetBlock(),a.unplug(),a.bumpNeighbours_();this.setStatements_(!1)}},getProcedureDef:function(){return[this.getFieldValue("NAME"),this.arguments_,!1]},getVars:function(){return this.arguments_},getVarModels:function(){return this.argumentVarModels_},renameVarById:function(a,b){var c=this.workspace.getVariableById(a);if(""==c.type){c=c.name;for(var d=this.workspace.getVariableById(b),
+e=!1,f=0;f<this.argumentVarModels_.length;f++)this.argumentVarModels_[f].getId()==a&&(this.arguments_[f]=d.name,this.argumentVarModels_[f]=d,e=!0);e&&this.displayRenamedVar_(c,d.name)}},updateVarName:function(a){for(var b=a.name,c=!1,d=0;d<this.argumentVarModels_.length;d++)if(this.argumentVarModels_[d].getId()==a.getId()){var e=this.arguments_[d];this.arguments_[d]=b;c=!0}c&&this.displayRenamedVar_(e,b)},displayRenamedVar_:function(a,b){this.updateParams_();if(this.mutator.isVisible())for(var c=
+this.mutator.workspace_.getAllBlocks(!1),d=0,e;e=c[d];d++)"procedures_mutatorarg"==e.type&&Blockly.Names.equals(a,e.getFieldValue("NAME"))&&e.setFieldValue(b,"NAME")},customContextMenu:function(a){if(!this.isInFlyout){var b={enabled:!0},c=this.getFieldValue("NAME");b.text=Blockly.Msg.PROCEDURES_CREATE_DO.replace("%1",c);var d=document.createElement("mutation");d.setAttribute("name",c);for(var e=0;e<this.arguments_.length;e++)c=document.createElement("arg"),c.setAttribute("name",this.arguments_[e]),
+d.appendChild(c);c=document.createElement("block");c.setAttribute("type",this.callType_);c.appendChild(d);b.callback=Blockly.ContextMenu.callbackFactory(this,c);a.push(b);if(!this.isCollapsed())for(e=0;e<this.argumentVarModels_.length;e++)b={enabled:!0},d=this.argumentVarModels_[e],c=d.name,b.text=Blockly.Msg.VARIABLES_SET_CREATE_GET.replace("%1",c),d=Blockly.Variables.generateVariableFieldDom(d),c=document.createElement("block"),c.setAttribute("type","variables_get"),c.appendChild(d),b.callback=
+Blockly.ContextMenu.callbackFactory(this,c),a.push(b)}},callType_:"procedures_callnoreturn"};
 Blockly.Blocks.procedures_defreturn={init:function(){var a=new Blockly.FieldTextInput("",Blockly.Procedures.rename);a.setSpellcheck(!1);this.appendDummyInput().appendField(Blockly.Msg.PROCEDURES_DEFRETURN_TITLE).appendField(a,"NAME").appendField("","PARAMS");this.appendValueInput("RETURN").setAlign(Blockly.ALIGN_RIGHT).appendField(Blockly.Msg.PROCEDURES_DEFRETURN_RETURN);this.setMutator(new Blockly.Mutator(["procedures_mutatorarg"]));(this.workspace.options.comments||this.workspace.options.parentWorkspace&&
 this.workspace.options.parentWorkspace.options.comments)&&Blockly.Msg.PROCEDURES_DEFRETURN_COMMENT&&this.setCommentText(Blockly.Msg.PROCEDURES_DEFRETURN_COMMENT);this.setColour(Blockly.Msg.PROCEDURES_HUE);this.setTooltip(Blockly.Msg.PROCEDURES_DEFRETURN_TOOLTIP);this.setHelpUrl(Blockly.Msg.PROCEDURES_DEFRETURN_HELPURL);this.arguments_=[];this.argumentVarModels_=[];this.setStatements_(!0);this.statementConnection_=null},setStatements_:Blockly.Blocks.procedures_defnoreturn.setStatements_,updateParams_:Blockly.Blocks.procedures_defnoreturn.updateParams_,
 mutationToDom:Blockly.Blocks.procedures_defnoreturn.mutationToDom,domToMutation:Blockly.Blocks.procedures_defnoreturn.domToMutation,decompose:Blockly.Blocks.procedures_defnoreturn.decompose,compose:Blockly.Blocks.procedures_defnoreturn.compose,getProcedureDef:function(){return[this.getFieldValue("NAME"),this.arguments_,!0]},getVars:Blockly.Blocks.procedures_defnoreturn.getVars,getVarModels:Blockly.Blocks.procedures_defnoreturn.getVarModels,renameVarById:Blockly.Blocks.procedures_defnoreturn.renameVarById,
@@ -157,10 +159,12 @@ Blockly.Extensions.registerMutator("text_charAt_mutator",Blockly.Constants.Text.
 Blockly.defineBlocksWithJsonArray([{type:"variables_get",message0:"%1",args0:[{type:"field_variable",name:"VAR",variable:"%{BKY_VARIABLES_DEFAULT_NAME}"}],output:null,colour:"%{BKY_VARIABLES_HUE}",helpUrl:"%{BKY_VARIABLES_GET_HELPURL}",tooltip:"%{BKY_VARIABLES_GET_TOOLTIP}",extensions:["contextMenu_variableSetterGetter"]},{type:"variables_set",message0:"%{BKY_VARIABLES_SET}",args0:[{type:"field_variable",name:"VAR",variable:"%{BKY_VARIABLES_DEFAULT_NAME}"},{type:"input_value",name:"VALUE"}],previousStatement:null,
 nextStatement:null,colour:"%{BKY_VARIABLES_HUE}",tooltip:"%{BKY_VARIABLES_SET_TOOLTIP}",helpUrl:"%{BKY_VARIABLES_SET_HELPURL}",extensions:["contextMenu_variableSetterGetter"]}]);
 Blockly.Constants.Variables.CUSTOM_CONTEXT_MENU_VARIABLE_GETTER_SETTER_MIXIN={customContextMenu:function(a){if(!this.isInFlyout){if("variables_get"==this.type)var b="variables_set",c=Blockly.Msg.VARIABLES_GET_CREATE_SET;else b="variables_get",c=Blockly.Msg.VARIABLES_SET_CREATE_GET;var d={enabled:0<this.workspace.remainingCapacity()},e=this.getField("VAR").getText();d.text=c.replace("%1",e);c=document.createElement("field");c.setAttribute("name","VAR");c.appendChild(document.createTextNode(e));e=document.createElement("block");
-e.setAttribute("type",b);e.appendChild(c);d.callback=Blockly.ContextMenu.callbackFactory(this,e);a.push(d)}}};Blockly.Extensions.registerMixin("contextMenu_variableSetterGetter",Blockly.Constants.Variables.CUSTOM_CONTEXT_MENU_VARIABLE_GETTER_SETTER_MIXIN);
+e.setAttribute("type",b);e.appendChild(c);d.callback=Blockly.ContextMenu.callbackFactory(this,e);a.push(d)}else if("variables_get"==this.type||"variables_get_reporter"==this.type)b={text:Blockly.Msg.RENAME_VARIABLE,enabled:!0,callback:Blockly.Constants.Variables.RENAME_OPTION_CALLBACK_FACTORY(this)},e=this.getField("VAR").getText(),d={text:Blockly.Msg.DELETE_VARIABLE.replace("%1",e),enabled:!0,callback:Blockly.Constants.Variables.DELETE_OPTION_CALLBACK_FACTORY(this)},a.unshift(b),a.unshift(d)}};
+Blockly.Constants.Variables.RENAME_OPTION_CALLBACK_FACTORY=function(a){return function(){var b=a.workspace,c=a.getField("VAR").getVariable();Blockly.Variables.renameVariable(b,c)}};Blockly.Constants.Variables.DELETE_OPTION_CALLBACK_FACTORY=function(a){return function(){var b=a.workspace,c=a.getField("VAR").getVariable();b.deleteVariableById(c.getId());b.refreshToolboxSelection()}};Blockly.Extensions.registerMixin("contextMenu_variableSetterGetter",Blockly.Constants.Variables.CUSTOM_CONTEXT_MENU_VARIABLE_GETTER_SETTER_MIXIN);
 Blockly.Constants.VariablesDynamic={};Blockly.Constants.VariablesDynamic.HUE=310;
 Blockly.defineBlocksWithJsonArray([{type:"variables_get_dynamic",message0:"%1",args0:[{type:"field_variable",name:"VAR",variable:"%{BKY_VARIABLES_DEFAULT_NAME}"}],output:null,colour:"%{BKY_VARIABLES_DYNAMIC_HUE}",helpUrl:"%{BKY_VARIABLES_GET_HELPURL}",tooltip:"%{BKY_VARIABLES_GET_TOOLTIP}",extensions:["contextMenu_variableDynamicSetterGetter"]},{type:"variables_set_dynamic",message0:"%{BKY_VARIABLES_SET}",args0:[{type:"field_variable",name:"VAR",variable:"%{BKY_VARIABLES_DEFAULT_NAME}"},{type:"input_value",
 name:"VALUE"}],previousStatement:null,nextStatement:null,colour:"%{BKY_VARIABLES_DYNAMIC_HUE}",tooltip:"%{BKY_VARIABLES_SET_TOOLTIP}",helpUrl:"%{BKY_VARIABLES_SET_HELPURL}",extensions:["contextMenu_variableDynamicSetterGetter"]}]);
 Blockly.Constants.VariablesDynamic.CUSTOM_CONTEXT_MENU_VARIABLE_GETTER_SETTER_MIXIN={customContextMenu:function(a){if(!this.isInFlyout){var b=this.getFieldValue("VAR");var c=this.workspace.getVariableById(b).type;if("variables_get_dynamic"==this.type){b="variables_set_dynamic";var d=Blockly.Msg.VARIABLES_GET_CREATE_SET}else b="variables_get_dynamic",d=Blockly.Msg.VARIABLES_SET_CREATE_GET;var e={enabled:0<this.workspace.remainingCapacity()},f=this.getField("VAR").getText();e.text=d.replace("%1",f);
-d=document.createElement("field");d.setAttribute("name","VAR");d.setAttribute("variabletype",c);d.appendChild(document.createTextNode(f));c=document.createElement("block");c.setAttribute("type",b);c.appendChild(d);e.callback=Blockly.ContextMenu.callbackFactory(this,c);a.push(e)}},onchange:function(){var a=this.getFieldValue("VAR");a=this.workspace.getVariableById(a);"variables_get_dynamic"==this.type?this.outputConnection.setCheck(a.type):this.getInput("VALUE").connection.setCheck(a.type)}};
-Blockly.Extensions.registerMixin("contextMenu_variableDynamicSetterGetter",Blockly.Constants.VariablesDynamic.CUSTOM_CONTEXT_MENU_VARIABLE_GETTER_SETTER_MIXIN);
\ No newline at end of file
+d=document.createElement("field");d.setAttribute("name","VAR");d.setAttribute("variabletype",c);d.appendChild(document.createTextNode(f));f=document.createElement("block");f.setAttribute("type",b);f.appendChild(d);e.callback=Blockly.ContextMenu.callbackFactory(this,f);a.push(e)}else if("variables_get_dynamic"==this.type||"variables_get_reporter_dynamic"==this.type)b={text:Blockly.Msg.RENAME_VARIABLE,enabled:!0,callback:Blockly.Constants.Variables.RENAME_OPTION_CALLBACK_FACTORY(this)},f=this.getField("VAR").getText(),
+e={text:Blockly.Msg.DELETE_VARIABLE.replace("%1",f),enabled:!0,callback:Blockly.Constants.Variables.DELETE_OPTION_CALLBACK_FACTORY(this)},a.unshift(b),a.unshift(e)},onchange:function(){var a=this.getFieldValue("VAR");a=this.workspace.getVariableById(a);"variables_get_dynamic"==this.type?this.outputConnection.setCheck(a.type):this.getInput("VALUE").connection.setCheck(a.type)}};
+Blockly.Constants.VariablesDynamic.RENAME_OPTION_CALLBACK_FACTORY=function(a){return function(){var b=a.workspace,c=a.getField("VAR").getVariable();Blockly.Variables.renameVariable(b,c)}};Blockly.Constants.VariablesDynamic.DELETE_OPTION_CALLBACK_FACTORY=function(a){return function(){var b=a.workspace,c=a.getField("VAR").getVariable();b.deleteVariableById(c.getId());b.refreshToolboxSelection()}};Blockly.Extensions.registerMixin("contextMenu_variableDynamicSetterGetter",Blockly.Constants.VariablesDynamic.CUSTOM_CONTEXT_MENU_VARIABLE_GETTER_SETTER_MIXIN);
\ No newline at end of file
diff --git a/core/block_dragger.js b/core/block_dragger.js
index ffd8f8754..47624a335 100644
--- a/core/block_dragger.js
+++ b/core/block_dragger.js
@@ -27,7 +27,7 @@
 goog.provide('Blockly.BlockDragger');
 
 goog.require('Blockly.BlockAnimations');
-goog.require('Blockly.DraggedConnectionManager');
+goog.require('Blockly.InsertionMarkerManager');
 goog.require('Blockly.Events.BlockMove');
 
 goog.require('goog.math.Coordinate');
@@ -57,10 +57,10 @@ Blockly.BlockDragger = function(block, workspace) {
 
   /**
    * Object that keeps track of connections on dragged blocks.
-   * @type {!Blockly.DraggedConnectionManager}
+   * @type {!Blockly.InsertionMarkerManager}
    * @private
    */
-  this.draggedConnectionManager_ = new Blockly.DraggedConnectionManager(
+  this.draggedConnectionManager_ = new Blockly.InsertionMarkerManager(
       this.draggingBlock_);
 
   /**
diff --git a/core/flyout_button.js b/core/flyout_button.js
index c81e86ed2..4cd12fab9 100644
--- a/core/flyout_button.js
+++ b/core/flyout_button.js
@@ -75,21 +75,11 @@ Blockly.FlyoutButton = function(workspace, targetWorkspace, xml, isLabel) {
   this.isLabel_ = isLabel;
 
   /**
-   * Function to call when this button is clicked.
-   * @type {function(!Blockly.FlyoutButton)}
+   * The key to the function called when this button is clicked.
+   * @type {string}
    * @private
    */
-  this.callback_ = null;
-
-  var callbackKey = xml.getAttribute('callbackKey');
-  if (this.isLabel_ && callbackKey) {
-    console.warn('Labels should not have callbacks. Label text: ' + this.text_);
-  } else if (!this.isLabel_ &&
-      !(callbackKey && targetWorkspace.getButtonCallback(callbackKey))) {
-    console.warn('Buttons should have callbacks. Button text: ' + this.text_);
-  } else {
-    this.callback_ = targetWorkspace.getButtonCallback(callbackKey);
-  }
+  this.callbackKey_ = xml.getAttribute('callbackKey');
 
   /**
    * If specified, a CSS class to add to this button.
@@ -257,8 +247,12 @@ Blockly.FlyoutButton.prototype.onMouseUp_ = function(e) {
     gesture.cancel();
   }
 
-  // Call the callback registered to this button.
-  if (this.callback_) {
-    this.callback_(this);
+  if (this.isLabel_ && this.callbackKey_) {
+    console.warn('Labels should not have callbacks. Label text: ' + this.text_);
+  } else if (!this.isLabel_ && !(this.callbackKey_ &&
+      this.targetWorkspace_.getButtonCallback(this.callbackKey_))) {
+    console.warn('Buttons should have callbacks. Button text: ' + this.text_);
+  } else if (!this.isLabel_) {
+    this.targetWorkspace_.getButtonCallback(this.callbackKey_)(this);
   }
 };
diff --git a/core/flyout_horizontal.js b/core/flyout_horizontal.js
index 3129e5386..e5e502a24 100644
--- a/core/flyout_horizontal.js
+++ b/core/flyout_horizontal.js
@@ -217,7 +217,7 @@ Blockly.HorizontalFlyout.prototype.scrollToStart = function() {
  * @private
  */
 Blockly.HorizontalFlyout.prototype.wheel_ = function(e) {
-  var delta = e.deltaX;
+  var delta = e.deltaX || e.deltaY;
 
   if (delta) {
     // Firefox's mouse wheel deltas are a tenth that of Chrome/Safari.
@@ -225,7 +225,6 @@ Blockly.HorizontalFlyout.prototype.wheel_ = function(e) {
     if (goog.userAgent.GECKO && (e.deltaMode === 1)) {
       delta *= 10;
     }
-    // TODO: #1093
     var metrics = this.getMetrics_();
     var pos = metrics.viewLeft + delta;
     var limit = metrics.contentWidth - metrics.viewWidth;
diff --git a/core/inject.js b/core/inject.js
index c123f6e01..2be8fff63 100644
--- a/core/inject.js
+++ b/core/inject.js
@@ -348,12 +348,12 @@ Blockly.init_ = function(mainWorkspace) {
     }
   }
 
-  var bottom = Blockly.Scrollbar.scrollbarThickness;
+  var verticalSpacing = Blockly.Scrollbar.scrollbarThickness;
   if (options.hasTrashcan) {
-    bottom = mainWorkspace.trashcan.init(bottom);
+    verticalSpacing = mainWorkspace.trashcan.init(verticalSpacing);
   }
   if (options.zoomOptions && options.zoomOptions.controls) {
-    mainWorkspace.zoomControls_.init(bottom);
+    mainWorkspace.zoomControls_.init(verticalSpacing);
   }
 
   if (options.hasScrollbars) {
diff --git a/core/trashcan.js b/core/trashcan.js
index 7d3f22355..340500ba6 100644
--- a/core/trashcan.js
+++ b/core/trashcan.js
@@ -265,19 +265,21 @@ Blockly.Trashcan.prototype.createDom = function() {
 
 /**
  * Initialize the trash can.
- * @param {number} bottom Distance from workspace bottom to bottom of trashcan.
- * @return {number} Distance from workspace bottom to the top of trashcan.
+ * @param {number} verticalSpacing Vertical distance from workspace edge to the
+ *    same edge of the trashcan.
+ * @return {number} Vertical distance from workspace edge to the opposite
+ *    edge of the trashcan.
  */
-Blockly.Trashcan.prototype.init = function(bottom) {
+Blockly.Trashcan.prototype.init = function(verticalSpacing) {
   if (this.workspace_.options.maxTrashcanContents > 0) {
     Blockly.utils.insertAfter(this.flyout_.createDom('svg'),
         this.workspace_.getParentSvg());
     this.flyout_.init(this.workspace_);
   }
 
-  this.bottom_ = this.MARGIN_BOTTOM_ + bottom;
+  this.verticalSpacing_ = this.MARGIN_BOTTOM_ + verticalSpacing;
   this.setOpen_(false);
-  return this.bottom_ + this.BODY_HEIGHT_ + this.LID_HEIGHT_;
+  return this.verticalSpacing_ + this.BODY_HEIGHT_ + this.LID_HEIGHT_;
 };
 
 /**
@@ -295,11 +297,14 @@ Blockly.Trashcan.prototype.dispose = function() {
 };
 
 /**
- * Move the trash can to the bottom-right corner.
+ * Position the trashcan.
+ * It is positioned in the upper corner when the toolbox is on bottom, and the
+ * bottom corner for all other toolbox positions. It is on the right in LTR,
+ * and left in RTL.
  */
 Blockly.Trashcan.prototype.position = function() {
   // Not yet initialized.
-  if (!this.bottom_) {
+  if (!this.verticalSpacing_) {
     return;
   }
   var metrics = this.workspace_.getMetrics();
@@ -323,12 +328,14 @@ Blockly.Trashcan.prototype.position = function() {
       this.left_ -= metrics.flyoutWidth;
     }
   }
-  this.top_ = metrics.viewHeight + metrics.absoluteTop -
-      (this.BODY_HEIGHT_ + this.LID_HEIGHT_) - this.bottom_;
 
   if (metrics.toolboxPosition == Blockly.TOOLBOX_AT_BOTTOM) {
-    this.top_ -= metrics.flyoutHeight;
+    this.top_ = this.verticalSpacing_;
+  } else {
+    this.top_ = metrics.viewHeight + metrics.absoluteTop -
+        (this.BODY_HEIGHT_ + this.LID_HEIGHT_) - this.verticalSpacing_;
   }
+
   this.svgGroup_.setAttribute('transform',
       'translate(' + this.left_ + ',' + this.top_ + ')');
 };
diff --git a/core/zoom_controls.js b/core/zoom_controls.js
index 3ca9d05a1..5ba858a37 100644
--- a/core/zoom_controls.js
+++ b/core/zoom_controls.js
@@ -94,7 +94,7 @@ Blockly.ZoomControls.prototype.top_ = 0;
  */
 Blockly.ZoomControls.prototype.createDom = function() {
   this.svgGroup_ =
-      Blockly.utils.createSvgElement('g', {'class': 'blocklyZoom'}, null);
+      Blockly.utils.createSvgElement('g', {}, null);
 
   // Each filter/pattern needs a unique ID for the case of multiple Blockly
   // instances on a page.  Browser behaviour becomes undefined otherwise.
@@ -108,12 +108,14 @@ Blockly.ZoomControls.prototype.createDom = function() {
 
 /**
  * Initialize the zoom controls.
- * @param {number} bottom Distance from workspace bottom to bottom of controls.
- * @return {number} Distance from workspace bottom to the top of controls.
+ * @param {number} verticalSpacing Vertical distances from workspace edge to the
+ *    same edge of the controls.
+ * @return {number} Vertical distance from workspace edge to the opposite
+ *    edge of the controls.
  */
-Blockly.ZoomControls.prototype.init = function(bottom) {
-  this.bottom_ = this.MARGIN_BOTTOM_ + bottom;
-  return this.bottom_ + this.HEIGHT_;
+Blockly.ZoomControls.prototype.init = function(verticalSpacing) {
+  this.verticalSpacing_ = this.MARGIN_BOTTOM_ + verticalSpacing;
+  return this.verticalSpacing_ + this.HEIGHT_;
 };
 
 /**
@@ -133,7 +135,7 @@ Blockly.ZoomControls.prototype.dispose = function() {
  */
 Blockly.ZoomControls.prototype.position = function() {
   // Not yet initialized.
-  if (!this.bottom_) {
+  if (!this.verticalSpacing_) {
     return;
   }
   var metrics = this.workspace_.getMetrics();
@@ -157,11 +159,18 @@ Blockly.ZoomControls.prototype.position = function() {
       this.left_ -= metrics.flyoutWidth;
     }
   }
-  this.top_ = metrics.viewHeight + metrics.absoluteTop -
-      this.HEIGHT_ - this.bottom_;
+
   if (metrics.toolboxPosition == Blockly.TOOLBOX_AT_BOTTOM) {
-    this.top_ -= metrics.flyoutHeight;
+    this.top_ = this.verticalSpacing_;
+    this.zoomInGroup_.setAttribute('transform', 'translate(0, 34)');
+    this.zoomResetGroup_.setAttribute('transform', 'translate(0, 77)');
+  } else {
+    this.top_ = metrics.viewHeight + metrics.absoluteTop -
+        this.HEIGHT_ - this.verticalSpacing_;
+    this.zoomInGroup_.setAttribute('transform', 'translate(0, 43)');
+    this.zoomOutGroup_.setAttribute('transform', 'translate(0, 77)');
   }
+
   this.svgGroup_.setAttribute('transform',
       'translate(' + this.left_ + ',' + this.top_ + ')');
 };
@@ -174,43 +183,38 @@ Blockly.ZoomControls.prototype.position = function() {
  * @private
  */
 Blockly.ZoomControls.prototype.createZoomOutSvg_ = function(rnd) {
-  /* This markup will be generated and added to the "blocklyZoom" group:
-  <svg id="svg837493">
-    <clippath id="blocklyZoomoutClipPath837493">
-      <rect width="32" height="32" y="77"></rect>
-    </clippath>
-    <image width="96" height="124" x="-64" y="-15" xlink:href="media/sprites.png"
+  /* This markup will be generated and added to the .svgGroup_:
+  <g class="blocklyZoom">
+    <clipPath id="blocklyZoomoutClipPath837493">
+      <rect width="32" height="32></rect>
+    </clipPath>
+    <image width="96" height="124" x="-64" y="-92" xlink:href="media/sprites.png"
         clip-path="url(#blocklyZoomoutClipPath837493)"></image>
-  </svg>
+  </g>
   */
   var ws = this.workspace_;
-
-  var svgHolder = Blockly.utils.createSvgElement('svg',
-      {
-        "id": "svg" + rnd
-      },
-      this.svgGroup_);
-
+  this.zoomOutGroup_ = Blockly.utils.createSvgElement('g',
+      {'class': 'blocklyZoom'}, this.svgGroup_);
   var clip = Blockly.utils.createSvgElement('clipPath',
       {
         'id': 'blocklyZoomoutClipPath' + rnd
       },
-      svgHolder);
+      this.zoomOutGroup_);
   Blockly.utils.createSvgElement('rect',
       {
         'width': 32,
         'height': 32,
-        'y': 77
       },
       clip);
   var zoomoutSvg = Blockly.utils.createSvgElement('image',
       {
         'width': Blockly.SPRITE.width,
-        'height': Blockly.SPRITE.height, 'x': -64,
-        'y': -15,
+        'height': Blockly.SPRITE.height,
+        'x': -64,
+        'y': -92,
         'clip-path': 'url(#blocklyZoomoutClipPath' + rnd + ')'
       },
-      svgHolder);
+      this.zoomOutGroup_);
   zoomoutSvg.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href',
       ws.options.pathToMedia + Blockly.SPRITE.url);
 
@@ -232,32 +236,27 @@ Blockly.ZoomControls.prototype.createZoomOutSvg_ = function(rnd) {
  * @private
  */
 Blockly.ZoomControls.prototype.createZoomInSvg_ = function(rnd) {
-  /* This markup will be generated and added to the "blocklyZoom" group:
-  <svg id="svg837493">
-    <clippath id="blocklyZoominClipPath837493">
-      <rect width="32" height="32" y="43"></rect>
-    </clippath>
-    <image width="96" height="124" x="-32" y="-49" xlink:href="media/sprites.png"
+  /* This markup will be generated and added to the .svgGroup_:
+  <g class="blocklyZoom">
+    <clipPath id="blocklyZoominClipPath837493">
+      <rect width="32" height="32"></rect>
+    </clipPath>
+    <image width="96" height="124" x="-32" y="-92" xlink:href="media/sprites.png"
         clip-path="url(#blocklyZoominClipPath837493)"></image>
-  </svg>
+  </g>
   */
- 
   var ws = this.workspace_;
-  var svgHolder = Blockly.utils.createSvgElement('svg',
-      {
-        "id": "svg" + rnd
-      },
-      this.svgGroup_);
+  this.zoomInGroup_ = Blockly.utils.createSvgElement('g',
+      {'class': 'blocklyZoom'}, this.svgGroup_);
   var clip = Blockly.utils.createSvgElement('clipPath',
       {
         'id': 'blocklyZoominClipPath' + rnd
       },
-      svgHolder);
+      this.zoomInGroup_);
   Blockly.utils.createSvgElement('rect',
       {
         'width': 32,
         'height': 32,
-        'y': 43
       },
       clip);
   var zoominSvg = Blockly.utils.createSvgElement('image',
@@ -265,10 +264,10 @@ Blockly.ZoomControls.prototype.createZoomInSvg_ = function(rnd) {
         'width': Blockly.SPRITE.width,
         'height': Blockly.SPRITE.height,
         'x': -32,
-        'y': -49,
+        'y': -92,
         'clip-path': 'url(#blocklyZoominClipPath' + rnd + ')'
       },
-      svgHolder);
+      this.zoomInGroup_);
   zoominSvg.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href',
       ws.options.pathToMedia + Blockly.SPRITE.url);
 
@@ -290,26 +289,23 @@ Blockly.ZoomControls.prototype.createZoomInSvg_ = function(rnd) {
  * @private
  */
 Blockly.ZoomControls.prototype.createZoomResetSvg_ = function(rnd) {
-  /* This markup will be generated and added to the "blocklyZoom" group:
-  <svg id="svg837493">
-    <clippath id="blocklyZoomresetClipPath837493">
+  /* This markup will be generated and added to the .svgGroup_:
+  <g class="blocklyZoom">
+    <clipPath id="blocklyZoomresetClipPath837493">
       <rect width="32" height="32"></rect>
-    </clippath>
-    <image width="96" height="124" y="-92" xlink:href="media/sprites.png"
+    </clipPath>
+    <image width="96" height="124" x="-32" y="-92" xlink:href="media/sprites.png"
         clip-path="url(#blocklyZoomresetClipPath837493)"></image>
-  </svg>
+  </g>
   */
   var ws = this.workspace_;
-  var svgHolder = Blockly.utils.createSvgElement('svg',
-      {
-        "id": "svg" + rnd
-      },
-      this.svgGroup_);
+  this.zoomResetGroup_ = Blockly.utils.createSvgElement('g',
+      {'class': 'blocklyZoom'}, this.svgGroup_);
   var clip = Blockly.utils.createSvgElement('clipPath',
       {
         'id': 'blocklyZoomresetClipPath' + rnd
       },
-      svgHolder);
+      this.zoomResetGroup_);
   Blockly.utils.createSvgElement('rect',
       {
         'width': 32,
@@ -319,10 +315,11 @@ Blockly.ZoomControls.prototype.createZoomResetSvg_ = function(rnd) {
   var zoomresetSvg = Blockly.utils.createSvgElement('image',
       {
         'width': Blockly.SPRITE.width,
-        'height': Blockly.SPRITE.height, 'y': -92,
+        'height': Blockly.SPRITE.height,
+        'y': -92,
         'clip-path': 'url(#blocklyZoomresetClipPath' + rnd + ')'
       },
-      svgHolder);
+      this.zoomResetGroup_);
   zoomresetSvg.setAttributeNS('http://www.w3.org/1999/xlink', 'xlink:href',
       ws.options.pathToMedia + Blockly.SPRITE.url);
 
diff --git a/dart_compressed.js b/dart_compressed.js
index 2d74acbfd..a9e84da5c 100644
--- a/dart_compressed.js
+++ b/dart_compressed.js
@@ -9,8 +9,8 @@ Blockly.Dart.init=function(a){Blockly.Dart.definitions_=Object.create(null);Bloc
 for(d=0;d<a.length;d++)b.push(Blockly.Dart.variableDB_.getName(a[d].getId(),Blockly.Variables.NAME_TYPE));b.length&&(Blockly.Dart.definitions_.variables="var "+b.join(", ")+";")};
 Blockly.Dart.finish=function(a){a&&(a=Blockly.Dart.prefixLines(a,Blockly.Dart.INDENT));a="main() {\n"+a+"}";var b=[],c=[],d;for(d in Blockly.Dart.definitions_){var e=Blockly.Dart.definitions_[d];e.match(/^import\s/)?b.push(e):c.push(e)}delete Blockly.Dart.definitions_;delete Blockly.Dart.functionNames_;Blockly.Dart.variableDB_.reset();return(b.join("\n")+"\n\n"+c.join("\n\n")).replace(/\n\n+/g,"\n\n").replace(/\n*$/,"\n\n\n")+a};Blockly.Dart.scrubNakedValue=function(a){return a+";\n"};
 Blockly.Dart.quote_=function(a){a=a.replace(/\\/g,"\\\\").replace(/\n/g,"\\\n").replace(/\$/g,"\\$").replace(/'/g,"\\'");return"'"+a+"'"};
-Blockly.Dart.scrub_=function(a,b){var c="";if(!a.outputConnection||!a.outputConnection.targetConnection){var d=a.getCommentText();(d=Blockly.utils.wrap(d,Blockly.Dart.COMMENT_WRAP-3))&&(c=a.getProcedureDef?c+Blockly.Dart.prefixLines(d+"\n","/// "):c+Blockly.Dart.prefixLines(d+"\n","// "));for(var e=0;e<a.inputList.length;e++)a.inputList[e].type==Blockly.INPUT_VALUE&&(d=a.inputList[e].connection.targetBlock())&&(d=Blockly.Dart.allNestedComments(d))&&(c+=Blockly.Dart.prefixLines(d,"// "))}e=a.nextConnection&&
-a.nextConnection.targetBlock();e=Blockly.Dart.blockToCode(e);return c+b+e};
+Blockly.Dart.scrub_=function(a,b,c){var d="";if(!a.outputConnection||!a.outputConnection.targetConnection){var e=a.getCommentText();(e=Blockly.utils.wrap(e,Blockly.Dart.COMMENT_WRAP-3))&&(d=a.getProcedureDef?d+Blockly.Dart.prefixLines(e+"\n","/// "):d+Blockly.Dart.prefixLines(e+"\n","// "));for(var f=0;f<a.inputList.length;f++)a.inputList[f].type==Blockly.INPUT_VALUE&&(e=a.inputList[f].connection.targetBlock())&&(e=Blockly.Dart.allNestedComments(e))&&(d+=Blockly.Dart.prefixLines(e,"// "))}a=a.nextConnection&&
+a.nextConnection.targetBlock();c=c?"":Blockly.Dart.blockToCode(a);return d+b+c};
 Blockly.Dart.getAdjusted=function(a,b,c,d,e){c=c||0;e=e||Blockly.Dart.ORDER_NONE;a.workspace.options.oneBasedIndex&&c--;var f=a.workspace.options.oneBasedIndex?"1":"0";a=c?Blockly.Dart.valueToCode(a,b,Blockly.Dart.ORDER_ADDITIVE)||f:d?Blockly.Dart.valueToCode(a,b,Blockly.Dart.ORDER_UNARY_PREFIX)||f:Blockly.Dart.valueToCode(a,b,e)||f;if(Blockly.isNumber(a))a=parseInt(a,10)+c,d&&(a=-a);else{if(0<c){a=a+" + "+c;var g=Blockly.Dart.ORDER_ADDITIVE}else 0>c&&(a=a+" - "+-c,g=Blockly.Dart.ORDER_ADDITIVE);
 d&&(a=c?"-("+a+")":"-"+a,g=Blockly.Dart.ORDER_UNARY_PREFIX);g=Math.floor(g);e=Math.floor(e);g&&e>=g&&(a="("+a+")")}return a};Blockly.Dart.colour={};Blockly.Dart.addReservedWords("Math");Blockly.Dart.colour_picker=function(a){return["'"+a.getFieldValue("COLOUR")+"'",Blockly.Dart.ORDER_ATOMIC]};
 Blockly.Dart.colour_random=function(a){Blockly.Dart.definitions_.import_dart_math="import 'dart:math' as Math;";return[Blockly.Dart.provideFunction_("colour_random",["String "+Blockly.Dart.FUNCTION_NAME_PLACEHOLDER_+"() {","  String hex = '0123456789abcdef';","  var rnd = new Math.Random();","  return '#${hex[rnd.nextInt(16)]}${hex[rnd.nextInt(16)]}'","      '${hex[rnd.nextInt(16)]}${hex[rnd.nextInt(16)]}'","      '${hex[rnd.nextInt(16)]}${hex[rnd.nextInt(16)]}';","}"])+"()",Blockly.Dart.ORDER_UNARY_POSTFIX]};
diff --git a/javascript_compressed.js b/javascript_compressed.js
index 4cca24e3e..dec1616c1 100644
--- a/javascript_compressed.js
+++ b/javascript_compressed.js
@@ -11,8 +11,8 @@ Blockly.JavaScript.ORDER_ADDITION],[Blockly.JavaScript.ORDER_LOGICAL_AND,Blockly
 Blockly.JavaScript.init=function(a){Blockly.JavaScript.definitions_=Object.create(null);Blockly.JavaScript.functionNames_=Object.create(null);Blockly.JavaScript.variableDB_?Blockly.JavaScript.variableDB_.reset():Blockly.JavaScript.variableDB_=new Blockly.Names(Blockly.JavaScript.RESERVED_WORDS_);Blockly.JavaScript.variableDB_.setVariableMap(a.getVariableMap());for(var b=[],c=Blockly.Variables.allDeveloperVariables(a),d=0;d<c.length;d++)b.push(Blockly.JavaScript.variableDB_.getName(c[d],Blockly.Names.DEVELOPER_VARIABLE_TYPE));
 a=Blockly.Variables.allUsedVarModels(a);for(d=0;d<a.length;d++)b.push(Blockly.JavaScript.variableDB_.getName(a[d].getId(),Blockly.Variables.NAME_TYPE));b.length&&(Blockly.JavaScript.definitions_.variables="var "+b.join(", ")+";")};
 Blockly.JavaScript.finish=function(a){var b=[],c;for(c in Blockly.JavaScript.definitions_)b.push(Blockly.JavaScript.definitions_[c]);delete Blockly.JavaScript.definitions_;delete Blockly.JavaScript.functionNames_;Blockly.JavaScript.variableDB_.reset();return b.join("\n\n")+"\n\n\n"+a};Blockly.JavaScript.scrubNakedValue=function(a){return a+";\n"};Blockly.JavaScript.quote_=function(a){a=a.replace(/\\/g,"\\\\").replace(/\n/g,"\\\n").replace(/'/g,"\\'");return"'"+a+"'"};
-Blockly.JavaScript.scrub_=function(a,b){var c="";if(!a.outputConnection||!a.outputConnection.targetConnection){var d=a.getCommentText();(d=Blockly.utils.wrap(d,Blockly.JavaScript.COMMENT_WRAP-3))&&(c=a.getProcedureDef?c+("/**\n"+Blockly.JavaScript.prefixLines(d+"\n"," * ")+" */\n"):c+Blockly.JavaScript.prefixLines(d+"\n","// "));for(var e=0;e<a.inputList.length;e++)a.inputList[e].type==Blockly.INPUT_VALUE&&(d=a.inputList[e].connection.targetBlock())&&(d=Blockly.JavaScript.allNestedComments(d))&&(c+=
-Blockly.JavaScript.prefixLines(d,"// "))}e=a.nextConnection&&a.nextConnection.targetBlock();e=Blockly.JavaScript.blockToCode(e);return c+b+e};
+Blockly.JavaScript.scrub_=function(a,b,c){var d="";if(!a.outputConnection||!a.outputConnection.targetConnection){var e=a.getCommentText();(e=Blockly.utils.wrap(e,Blockly.JavaScript.COMMENT_WRAP-3))&&(d=a.getProcedureDef?d+("/**\n"+Blockly.JavaScript.prefixLines(e+"\n"," * ")+" */\n"):d+Blockly.JavaScript.prefixLines(e+"\n","// "));for(var f=0;f<a.inputList.length;f++)a.inputList[f].type==Blockly.INPUT_VALUE&&(e=a.inputList[f].connection.targetBlock())&&(e=Blockly.JavaScript.allNestedComments(e))&&
+(d+=Blockly.JavaScript.prefixLines(e,"// "))}a=a.nextConnection&&a.nextConnection.targetBlock();c=c?"":Blockly.JavaScript.blockToCode(a);return d+b+c};
 Blockly.JavaScript.getAdjusted=function(a,b,c,d,e){c=c||0;e=e||Blockly.JavaScript.ORDER_NONE;a.workspace.options.oneBasedIndex&&c--;var f=a.workspace.options.oneBasedIndex?"1":"0";a=0<c?Blockly.JavaScript.valueToCode(a,b,Blockly.JavaScript.ORDER_ADDITION)||f:0>c?Blockly.JavaScript.valueToCode(a,b,Blockly.JavaScript.ORDER_SUBTRACTION)||f:d?Blockly.JavaScript.valueToCode(a,b,Blockly.JavaScript.ORDER_UNARY_NEGATION)||f:Blockly.JavaScript.valueToCode(a,b,e)||f;if(Blockly.isNumber(a))a=parseFloat(a)+c,
 d&&(a=-a);else{if(0<c){a=a+" + "+c;var g=Blockly.JavaScript.ORDER_ADDITION}else 0>c&&(a=a+" - "+-c,g=Blockly.JavaScript.ORDER_SUBTRACTION);d&&(a=c?"-("+a+")":"-"+a,g=Blockly.JavaScript.ORDER_UNARY_NEGATION);g=Math.floor(g);e=Math.floor(e);g&&e>=g&&(a="("+a+")")}return a};Blockly.JavaScript.colour={};Blockly.JavaScript.colour_picker=function(a){return["'"+a.getFieldValue("COLOUR")+"'",Blockly.JavaScript.ORDER_ATOMIC]};Blockly.JavaScript.colour_random=function(a){return[Blockly.JavaScript.provideFunction_("colourRandom",["function "+Blockly.JavaScript.FUNCTION_NAME_PLACEHOLDER_+"() {","  var num = Math.floor(Math.random() * Math.pow(2, 24));","  return '#' + ('00000' + num.toString(16)).substr(-6);","}"])+"()",Blockly.JavaScript.ORDER_FUNCTION_CALL]};
 Blockly.JavaScript.colour_rgb=function(a){var b=Blockly.JavaScript.valueToCode(a,"RED",Blockly.JavaScript.ORDER_COMMA)||0,c=Blockly.JavaScript.valueToCode(a,"GREEN",Blockly.JavaScript.ORDER_COMMA)||0;a=Blockly.JavaScript.valueToCode(a,"BLUE",Blockly.JavaScript.ORDER_COMMA)||0;return[Blockly.JavaScript.provideFunction_("colourRgb",["function "+Blockly.JavaScript.FUNCTION_NAME_PLACEHOLDER_+"(r, g, b) {","  r = Math.max(Math.min(Number(r), 100), 0) * 2.55;","  g = Math.max(Math.min(Number(g), 100), 0) * 2.55;",
diff --git a/local_build/local_build.sh b/local_build/local_build.sh
index c5122036c..4336d3a10 100755
--- a/local_build/local_build.sh
+++ b/local_build/local_build.sh
@@ -20,7 +20,7 @@
 #
 # Usage: local_build.sh.
 #
-# This script generates only local_blockly_compressed.js.  You may modify it as
+# This script generates only local_blockly_compressed.js. You may modify it as
 # needed to build other files.
 #
 # The compressed file is a concatenation of all of Blockly's core files, run
@@ -33,6 +33,15 @@
 # - Add a good error message if multiple versions of the closure compiler were
 #   found.
 
+EXPECTED_PWD='local_build'
+# Check the current working directory.
+if [[ ${PWD##*/} != $EXPECTED_PWD ]]; then
+  echo ""
+  echo "  WARNING   This script should be run from the local_build folder."
+  echo ""
+  exit 1
+fi
+
 # Find the Closure Compiler.
 if [ -f "$(npm root)/google-closure-compiler/compiler.jar" ]; then
   COMPILER="$(npm root)/google-closure-compiler/compiler.jar"
diff --git a/lua_compressed.js b/lua_compressed.js
index 0fdd2334c..c5282fef3 100644
--- a/lua_compressed.js
+++ b/lua_compressed.js
@@ -6,8 +6,8 @@ Blockly.Lua=new Blockly.Generator("Lua");Blockly.Lua.addReservedWords("_,__inext
 Blockly.Lua.ORDER_ATOMIC=0;Blockly.Lua.ORDER_HIGH=1;Blockly.Lua.ORDER_EXPONENTIATION=2;Blockly.Lua.ORDER_UNARY=3;Blockly.Lua.ORDER_MULTIPLICATIVE=4;Blockly.Lua.ORDER_ADDITIVE=5;Blockly.Lua.ORDER_CONCATENATION=6;Blockly.Lua.ORDER_RELATIONAL=7;Blockly.Lua.ORDER_AND=8;Blockly.Lua.ORDER_OR=9;Blockly.Lua.ORDER_NONE=99;
 Blockly.Lua.init=function(a){Blockly.Lua.definitions_=Object.create(null);Blockly.Lua.functionNames_=Object.create(null);Blockly.Lua.variableDB_?Blockly.Lua.variableDB_.reset():Blockly.Lua.variableDB_=new Blockly.Names(Blockly.Lua.RESERVED_WORDS_);Blockly.Lua.variableDB_.setVariableMap(a.getVariableMap())};
 Blockly.Lua.finish=function(a){var b=[],c;for(c in Blockly.Lua.definitions_)b.push(Blockly.Lua.definitions_[c]);delete Blockly.Lua.definitions_;delete Blockly.Lua.functionNames_;Blockly.Lua.variableDB_.reset();return b.join("\n\n")+"\n\n\n"+a};Blockly.Lua.scrubNakedValue=function(a){return"local _ = "+a+"\n"};Blockly.Lua.quote_=function(a){a=a.replace(/\\/g,"\\\\").replace(/\n/g,"\\\n").replace(/'/g,"\\'");return"'"+a+"'"};
-Blockly.Lua.scrub_=function(a,b){var c="";if(!a.outputConnection||!a.outputConnection.targetConnection){var d=a.getCommentText();(d=Blockly.utils.wrap(d,Blockly.Lua.COMMENT_WRAP-3))&&(c+=Blockly.Lua.prefixLines(d,"-- ")+"\n");for(var e=0;e<a.inputList.length;e++)a.inputList[e].type==Blockly.INPUT_VALUE&&(d=a.inputList[e].connection.targetBlock())&&(d=Blockly.Lua.allNestedComments(d))&&(c+=Blockly.Lua.prefixLines(d,"-- "))}e=a.nextConnection&&a.nextConnection.targetBlock();e=Blockly.Lua.blockToCode(e);
-return c+b+e};Blockly.Lua.colour={};Blockly.Lua.colour_picker=function(a){return["'"+a.getFieldValue("COLOUR")+"'",Blockly.Lua.ORDER_ATOMIC]};Blockly.Lua.colour_random=function(a){return['string.format("#%06x", math.random(0, 2^24 - 1))',Blockly.Lua.ORDER_HIGH]};
+Blockly.Lua.scrub_=function(a,b,c){var d="";if(!a.outputConnection||!a.outputConnection.targetConnection){var e=a.getCommentText();(e=Blockly.utils.wrap(e,Blockly.Lua.COMMENT_WRAP-3))&&(d+=Blockly.Lua.prefixLines(e,"-- ")+"\n");for(var f=0;f<a.inputList.length;f++)a.inputList[f].type==Blockly.INPUT_VALUE&&(e=a.inputList[f].connection.targetBlock())&&(e=Blockly.Lua.allNestedComments(e))&&(d+=Blockly.Lua.prefixLines(e,"-- "))}a=a.nextConnection&&a.nextConnection.targetBlock();c=c?"":Blockly.Lua.blockToCode(a);
+return d+b+c};Blockly.Lua.colour={};Blockly.Lua.colour_picker=function(a){return["'"+a.getFieldValue("COLOUR")+"'",Blockly.Lua.ORDER_ATOMIC]};Blockly.Lua.colour_random=function(a){return['string.format("#%06x", math.random(0, 2^24 - 1))',Blockly.Lua.ORDER_HIGH]};
 Blockly.Lua.colour_rgb=function(a){var b=Blockly.Lua.provideFunction_("colour_rgb",["function "+Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_+"(r, g, b)","  r = math.floor(math.min(100, math.max(0, r)) * 2.55 + .5)","  g = math.floor(math.min(100, math.max(0, g)) * 2.55 + .5)","  b = math.floor(math.min(100, math.max(0, b)) * 2.55 + .5)",'  return string.format("#%02x%02x%02x", r, g, b)',"end"]),c=Blockly.Lua.valueToCode(a,"RED",Blockly.Lua.ORDER_NONE)||0,d=Blockly.Lua.valueToCode(a,"GREEN",Blockly.Lua.ORDER_NONE)||
 0;a=Blockly.Lua.valueToCode(a,"BLUE",Blockly.Lua.ORDER_NONE)||0;return[b+"("+c+", "+d+", "+a+")",Blockly.Lua.ORDER_HIGH]};
 Blockly.Lua.colour_blend=function(a){var b=Blockly.Lua.provideFunction_("colour_blend",["function "+Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_+"(colour1, colour2, ratio)","  local r1 = tonumber(string.sub(colour1, 2, 3), 16)","  local r2 = tonumber(string.sub(colour2, 2, 3), 16)","  local g1 = tonumber(string.sub(colour1, 4, 5), 16)","  local g2 = tonumber(string.sub(colour2, 4, 5), 16)","  local b1 = tonumber(string.sub(colour1, 6, 7), 16)","  local b2 = tonumber(string.sub(colour2, 6, 7), 16)","  local ratio = math.min(1, math.max(0, ratio))",
diff --git a/msg/json/hy.json b/msg/json/hy.json
index b54e1524a..4edfc89c6 100644
--- a/msg/json/hy.json
+++ b/msg/json/hy.json
@@ -79,7 +79,7 @@
 	"CONTROLS_IF_TOOLTIP_4": "Եթե առաջին պայմանը ճշմարիտ է, ապա կատարում է հրահանգների առաջին բլոկը: Հակառակ դեպքում, եթե երկրորդ պայմանն է ճշմարիտ, կատարում է հրահանգների երկրորդ բլոկը: Եթե պայմաններից ոչ մեկը ճշմարիտ չեն, ապա  կատարում է հրահանգների վերջին բլոկը:",
 	"CONTROLS_IF_MSG_IF": "եթե",
 	"CONTROLS_IF_MSG_ELSEIF": "հակառակ դեպքում, եթե",
-	"CONTROLS_IF_MSG_ELSE": "նաև",
+	"CONTROLS_IF_MSG_ELSE": "հակառակ դեպքում",
 	"CONTROLS_IF_IF_TOOLTIP": "Ավելացնել, հեռացնել կամ փոխել հերթականությունը այս \"եթե\" բլոկը վերակարգավորելու համար։",
 	"CONTROLS_IF_ELSEIF_TOOLTIP": "Ավելացնում է պայման «եթե» բլոկին:",
 	"CONTROLS_IF_ELSE_TOOLTIP": "Ավելացնել վերջնական ենթաբլոկ (այն կաշխատի, եթե բոլոր պայմանները կեղծ են)",
@@ -144,7 +144,7 @@
 	"MATH_TRIG_TOOLTIP_ACOS": "Վերադարձնում է թվի արկկոսինուսը:",
 	"MATH_TRIG_TOOLTIP_ATAN": "Վերադարձնում է թվի արկտանգենսը:",
 	"MATH_CONSTANT_HELPURL": "https://hy.wikipedia.org/wiki/Մաթեմատիկական_հաստատուն",
-	"MATH_CONSTANT_TOOLTIP": "Վերադարձնում է ընդհանուր հաստատուններից մեկը. π (3.141…), e (2.718…), φ (1.618…), sqrt(2) (1.414…), sqrt(½) (0.707…), կամ ∞ (անվերջություն):",
+	"MATH_CONSTANT_TOOLTIP": "Վերադարձնում է տարածված հաստատուններից մեկը՝ π (3.141…), e (2.718…), φ (1.618…), sqrt(2) (1.414…), sqrt(½) (0.707…), կամ ∞ (անվերջություն):",
 	"MATH_IS_EVEN": "զույգ է",
 	"MATH_IS_ODD": "կենտ է",
 	"MATH_IS_PRIME": "պարզ է",
@@ -247,7 +247,7 @@
 	"LISTS_CREATE_WITH_ITEM_TOOLTIP": "Ավելացնել տարր ցանկին:",
 	"LISTS_REPEAT_TOOLTIP": "Տրված արժեքը նշված քանակով կրկնելու միջոցով, ստեղծում է ցանկ։",
 	"LISTS_REPEAT_TITLE": "ստեղծել ցանկ, %1 արժեքը կրկնելով %2 անգամ",
-	"LISTS_LENGTH_TITLE": "երկարությունը %1",
+	"LISTS_LENGTH_TITLE": "%1֊ի երկարությունը",
 	"LISTS_LENGTH_TOOLTIP": "Վերադարձնում է ցանկի երկարությունը:",
 	"LISTS_ISEMPTY_TITLE": "%1 դատարկ է",
 	"LISTS_ISEMPTY_TOOLTIP": "Վերադարձնում է \"ճշմարիտ\" եթե ցանկը դատարկ է։",
@@ -296,13 +296,13 @@
 	"LISTS_GET_SUBLIST_TOOLTIP": "Ստեղծում է ցանկի նշված մասի պատճենը։",
 	"LISTS_SORT_TITLE": "դասավորել %1 %2 %3",
 	"LISTS_SORT_TOOLTIP": "Դասավորում է ցանկի պատճենը",
-	"LISTS_SORT_ORDER_ASCENDING": "աճման",
-	"LISTS_SORT_ORDER_DESCENDING": "նվազման",
-	"LISTS_SORT_TYPE_NUMERIC": "թվային",
-	"LISTS_SORT_TYPE_TEXT": "այբբենական",
+	"LISTS_SORT_ORDER_ASCENDING": "աճման կարգ",
+	"LISTS_SORT_ORDER_DESCENDING": "նվազման կարգ",
+	"LISTS_SORT_TYPE_NUMERIC": "թվային կարգ",
+	"LISTS_SORT_TYPE_TEXT": "այբբենական կարգ",
 	"LISTS_SORT_TYPE_IGNORECASE": "այբենական, անտեսել ռեգիստրը",
-	"LISTS_SPLIT_LIST_FROM_TEXT": "պատրաստել ցանկ տեքստից",
-	"LISTS_SPLIT_TEXT_FROM_LIST": "պատրաստել  տեքստ ցանկից",
+	"LISTS_SPLIT_LIST_FROM_TEXT": "ստեղծել ցանկ տեքստից",
+	"LISTS_SPLIT_TEXT_FROM_LIST": "ստեղծել տեքստ ցանկից",
 	"LISTS_SPLIT_WITH_DELIMITER": "բաժանարարով",
 	"LISTS_SPLIT_TOOLTIP_SPLIT": "Տեքստը վեր է ածվում ցանկի, նշված բաժանարարով։",
 	"LISTS_SPLIT_TOOLTIP_JOIN": "Ցանկից ստեղծվում է միացյալ տեքստ, ցանկի անդամները միացվում են բաժանարարներով։",
diff --git a/msg/json/is.json b/msg/json/is.json
index 7197c2b9b..cbcd2adf1 100644
--- a/msg/json/is.json
+++ b/msg/json/is.json
@@ -13,6 +13,7 @@
 	"DUPLICATE_BLOCK": "Afrita",
 	"ADD_COMMENT": "Skrifa skýringu",
 	"REMOVE_COMMENT": "Fjarlægja skýringu",
+	"DUPLICATE_COMMENT": "Tvítaka athugasemd",
 	"EXTERNAL_INPUTS": "Ytri inntök",
 	"INLINE_INPUTS": "Innri inntök",
 	"DELETE_BLOCK": "Eyða kubbi",
@@ -368,5 +369,6 @@
 	"PROCEDURES_CREATE_DO": "Búa til '%1'",
 	"PROCEDURES_IFRETURN_TOOLTIP": "Ef gildi er satt, skal skila öðru gildi.",
 	"PROCEDURES_IFRETURN_HELPURL": "http://c2.com/cgi/wiki?GuardClause",
-	"PROCEDURES_IFRETURN_WARNING": "Aðvörun: Þennan kubb má aðeins nota í skilgreiningu falls."
+	"PROCEDURES_IFRETURN_WARNING": "Aðvörun: Þennan kubb má aðeins nota í skilgreiningu falls.",
+	"WORKSPACE_COMMENT_DEFAULT_TEXT": "Segðu eitthvað..."
 }
diff --git a/msg/json/nl.json b/msg/json/nl.json
index a172a8764..64949977f 100644
--- a/msg/json/nl.json
+++ b/msg/json/nl.json
@@ -13,7 +13,8 @@
 			"Festina90",
 			"Optilete",
 			"Patio",
-			"KlaasZ4usV"
+			"KlaasZ4usV",
+			"Marcelhospers"
 		]
 	},
 	"VARIABLES_DEFAULT_NAME": "item",
@@ -219,6 +220,8 @@
 	"MATH_RANDOM_FLOAT_HELPURL": "https://nl.wikipedia.org/wiki/Toevalsgenerator",
 	"MATH_RANDOM_FLOAT_TITLE_RANDOM": "willekeurige fractie",
 	"MATH_RANDOM_FLOAT_TOOLTIP": "Geeft een willekeurige fractie tussen 0.0 (inclusief) en 1.0 (exclusief).",
+	"MATH_ATAN2_TITLE": "atan2 van X:%1 Y:%2",
+	"MATH_ATAN2_TOOLTIP": "Geef de boogtangens van punt (X, Y) terug in graden tussen -180 naar 180.",
 	"TEXT_TEXT_HELPURL": "https://nl.wikipedia.org/wiki/String_%28informatica%29",
 	"TEXT_TEXT_TOOLTIP": "Een letter, woord of een regel tekst.",
 	"TEXT_JOIN_HELPURL": "https://github.com/google/blockly/wiki/Text#text-creation",
diff --git a/msg/json/sr.json b/msg/json/sr.json
index df7d2a304..1dea9cef4 100644
--- a/msg/json/sr.json
+++ b/msg/json/sr.json
@@ -174,7 +174,7 @@
 	"MATH_IS_TOOLTIP": "Проверава да ли је број паран, непаран, прост, цео, позитиван, негативан, или дељив са одређеним бројем. Враћа „тачно” или „нетачно”.",
 	"MATH_CHANGE_HELPURL": "https://en.wikipedia.org/wiki/Programming_idiom#Incrementing_a_counter",
 	"MATH_CHANGE_TITLE": "промени %1 за %2",
-	"MATH_CHANGE_TOOLTIP": "Додајте број променљивој „%1“.",
+	"MATH_CHANGE_TOOLTIP": "Додаје број променљивој „%1”.",
 	"MATH_ROUND_HELPURL": "https://sr.wikipedia.org/wiki/Заокруживање",
 	"MATH_ROUND_TOOLTIP": "Заокружује број на већу или мању вредност.",
 	"MATH_ROUND_OPERATOR_ROUND": "заокружи",
@@ -188,11 +188,11 @@
 	"MATH_ONLIST_OPERATOR_MAX": "макс. списка",
 	"MATH_ONLIST_TOOLTIP_MAX": "Враћа највећи број са списка.",
 	"MATH_ONLIST_OPERATOR_AVERAGE": "просек списка",
-	"MATH_ONLIST_TOOLTIP_AVERAGE": "Враћа просек (аритметичка средина) бројчаних вредности са списка.",
+	"MATH_ONLIST_TOOLTIP_AVERAGE": "Враћа просек (аритметичку средину) бројева са списка.",
 	"MATH_ONLIST_OPERATOR_MEDIAN": "медијана списка",
 	"MATH_ONLIST_TOOLTIP_MEDIAN": "Враћа медијану са списка.",
 	"MATH_ONLIST_OPERATOR_MODE": "модус списка",
-	"MATH_ONLIST_TOOLTIP_MODE": "Враћа слисак најчешће(их) ставке(и) са списка.",
+	"MATH_ONLIST_TOOLTIP_MODE": "Враћа списак најчешћих ставки на списку.",
 	"MATH_ONLIST_OPERATOR_STD_DEV": "стандардна девијација списка",
 	"MATH_ONLIST_TOOLTIP_STD_DEV": "Враћа стандардну девијацију списка.",
 	"MATH_ONLIST_OPERATOR_RANDOM": "случајна ставка списка",
@@ -219,7 +219,7 @@
 	"TEXT_CREATE_JOIN_TOOLTIP": "Додај, уклони, или другачије поредај одјелке како би изнова поставили овај текст блок.",
 	"TEXT_CREATE_JOIN_ITEM_TOOLTIP": "Додајте ставку у текст.",
 	"TEXT_APPEND_TITLE": "на %1 додај текст %2",
-	"TEXT_APPEND_TOOLTIP": "Додаје текст на променљиву „%1“.",
+	"TEXT_APPEND_TOOLTIP": "Додаје текст променљивој „%1”.",
 	"TEXT_LENGTH_TITLE": "дужина текста %1",
 	"TEXT_LENGTH_TOOLTIP": "Враћа број слова (уклјучујући размаке) у датом тексту.",
 	"TEXT_ISEMPTY_TITLE": "%1 је празан",
@@ -346,10 +346,10 @@
 	"LISTS_REVERSE_TOOLTIP": "Обрни копију списка.",
 	"ORDINAL_NUMBER_SUFFIX": "",
 	"VARIABLES_GET_TOOLTIP": "Враћа вредност ове променљиве.",
-	"VARIABLES_GET_CREATE_SET": "Направи „постави %1“",
+	"VARIABLES_GET_CREATE_SET": "Направи блок за доделу вредности %1",
 	"VARIABLES_SET": "постави %1 у %2",
 	"VARIABLES_SET_TOOLTIP": "Поставља променљиву тако да буде једнака улазу.",
-	"VARIABLES_SET_CREATE_GET": "Направи „преузми %1“",
+	"VARIABLES_SET_CREATE_GET": "Направи блок за преузимање вредности из „%1”",
 	"PROCEDURES_DEFNORETURN_HELPURL": "https://en.wikipedia.org/wiki/Procedure_%28computer_science%29",
 	"PROCEDURES_DEFNORETURN_TITLE": "до",
 	"PROCEDURES_DEFNORETURN_PROCEDURE": "урадите нешто",
@@ -362,18 +362,18 @@
 	"PROCEDURES_DEFRETURN_RETURN": "врати",
 	"PROCEDURES_DEFRETURN_TOOLTIP": "Прави функцију са излазом.",
 	"PROCEDURES_ALLOW_STATEMENTS": "дозволи изјаве",
-	"PROCEDURES_DEF_DUPLICATE_WARNING": "Упозорење: Ова функција има дуплиране параметаре.",
+	"PROCEDURES_DEF_DUPLICATE_WARNING": "Упозорење: Ова функција има дуплиране параметре.",
 	"PROCEDURES_CALLNORETURN_HELPURL": "https://sr.wikipedia.org/wiki/Потпрограм",
-	"PROCEDURES_CALLNORETURN_TOOLTIP": "Покрените кориснички дефинисану функцију „%1”.",
+	"PROCEDURES_CALLNORETURN_TOOLTIP": "Покреће кориснички дефинисану функцију „%1”.",
 	"PROCEDURES_CALLRETURN_HELPURL": "https://sr.wikipedia.org/wiki/Потпрограм",
-	"PROCEDURES_CALLRETURN_TOOLTIP": "Покрените кориснички дефинисану функцију „%1” и користите њен излаз.",
+	"PROCEDURES_CALLRETURN_TOOLTIP": "Покреће кориснички дефинисану функцију „%1” и користи њен излаз.",
 	"PROCEDURES_MUTATORCONTAINER_TITLE": "улази",
 	"PROCEDURES_MUTATORCONTAINER_TOOLTIP": "Додајте, уклоните или преуредите уносе за ову функцију.",
-	"PROCEDURES_MUTATORARG_TITLE": "име уноса:",
+	"PROCEDURES_MUTATORARG_TITLE": "име параметра:",
 	"PROCEDURES_MUTATORARG_TOOLTIP": "Додајте улазни параметар финкцији.",
 	"PROCEDURES_HIGHLIGHT_DEF": "Истакни дефиницију функције",
-	"PROCEDURES_CREATE_DO": "Направи „%1“",
-	"PROCEDURES_IFRETURN_TOOLTIP": "Ако је вредност „тачно“, онда врати другу вредност.",
+	"PROCEDURES_CREATE_DO": "Направи „%1”",
+	"PROCEDURES_IFRETURN_TOOLTIP": "Ако је прва вредност тачна, враћа другу вредност.",
 	"PROCEDURES_IFRETURN_WARNING": "Упозорење: Овај блок се може користити једино унутар дефиниције функције.",
 	"WORKSPACE_COMMENT_DEFAULT_TEXT": "Кажите нешто…"
 }
diff --git a/msg/json/vi.json b/msg/json/vi.json
index 8308726e8..758f0d112 100644
--- a/msg/json/vi.json
+++ b/msg/json/vi.json
@@ -34,7 +34,7 @@
 	"REDO": "Làm lại",
 	"CHANGE_VALUE_TITLE": "Thay giá trị thành:",
 	"RENAME_VARIABLE": "Thay tên biến...",
-	"RENAME_VARIABLE_TITLE": "Thay tên tất cả \"%1\" biến này thành:",
+	"RENAME_VARIABLE_TITLE": "Thay tên tất cả các biến \"%1\" thành:",
 	"NEW_VARIABLE": "Tạo biến...",
 	"NEW_STRING_VARIABLE": "Tạo một giá trị dạng chuỗi...",
 	"NEW_NUMBER_VARIABLE": "Tạo một giá trị số...",
diff --git a/package.json b/package.json
index 17c9eb88d..469be7a6c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "blockly",
-  "version": "1.20181030.0-develop",
+  "version": "1.20181219.0-develop",
   "description": "Blockly is a library for building visual programming editors.",
   "main": "blockly_node_javascript_en.js",
   "keywords": [
diff --git a/php_compressed.js b/php_compressed.js
index fab0acb2c..9f72aae76 100644
--- a/php_compressed.js
+++ b/php_compressed.js
@@ -10,8 +10,8 @@ Blockly.PHP.ORDER_OVERRIDES=[[Blockly.PHP.ORDER_MEMBER,Blockly.PHP.ORDER_FUNCTIO
 Blockly.PHP.init=function(a){Blockly.PHP.definitions_=Object.create(null);Blockly.PHP.functionNames_=Object.create(null);Blockly.PHP.variableDB_?Blockly.PHP.variableDB_.reset():Blockly.PHP.variableDB_=new Blockly.Names(Blockly.PHP.RESERVED_WORDS_,"$");Blockly.PHP.variableDB_.setVariableMap(a.getVariableMap());for(var b=[],c=Blockly.Variables.allDeveloperVariables(a),d=0;d<c.length;d++)b.push(Blockly.PHP.variableDB_.getName(c[d],Blockly.Names.DEVELOPER_VARIABLE_TYPE)+";");a=Blockly.Variables.allUsedVarModels(a);
 for(d=0;c=a[d];d++)b.push(Blockly.PHP.variableDB_.getName(c.getId(),Blockly.Variables.NAME_TYPE)+";");Blockly.PHP.definitions_.variables=b.join("\n")};Blockly.PHP.finish=function(a){var b=[],c;for(c in Blockly.PHP.definitions_)b.push(Blockly.PHP.definitions_[c]);delete Blockly.PHP.definitions_;delete Blockly.PHP.functionNames_;Blockly.PHP.variableDB_.reset();return b.join("\n\n")+"\n\n\n"+a};Blockly.PHP.scrubNakedValue=function(a){return a+";\n"};
 Blockly.PHP.quote_=function(a){a=a.replace(/\\/g,"\\\\").replace(/\n/g,"\\\n").replace(/'/g,"\\'");return"'"+a+"'"};
-Blockly.PHP.scrub_=function(a,b){var c="";if(!a.outputConnection||!a.outputConnection.targetConnection){var d=a.getCommentText();(d=Blockly.utils.wrap(d,Blockly.PHP.COMMENT_WRAP-3))&&(c+=Blockly.PHP.prefixLines(d,"// ")+"\n");for(var e=0;e<a.inputList.length;e++)a.inputList[e].type==Blockly.INPUT_VALUE&&(d=a.inputList[e].connection.targetBlock())&&(d=Blockly.PHP.allNestedComments(d))&&(c+=Blockly.PHP.prefixLines(d,"// "))}e=a.nextConnection&&a.nextConnection.targetBlock();e=Blockly.PHP.blockToCode(e);
-return c+b+e};
+Blockly.PHP.scrub_=function(a,b,c){var d="";if(!a.outputConnection||!a.outputConnection.targetConnection){var e=a.getCommentText();(e=Blockly.utils.wrap(e,Blockly.PHP.COMMENT_WRAP-3))&&(d+=Blockly.PHP.prefixLines(e,"// ")+"\n");for(var f=0;f<a.inputList.length;f++)a.inputList[f].type==Blockly.INPUT_VALUE&&(e=a.inputList[f].connection.targetBlock())&&(e=Blockly.PHP.allNestedComments(e))&&(d+=Blockly.PHP.prefixLines(e,"// "))}a=a.nextConnection&&a.nextConnection.targetBlock();c=c?"":Blockly.PHP.blockToCode(a);
+return d+b+c};
 Blockly.PHP.getAdjusted=function(a,b,c,d,e){c=c||0;e=e||Blockly.PHP.ORDER_NONE;a.workspace.options.oneBasedIndex&&c--;var f=a.workspace.options.oneBasedIndex?"1":"0";a=0<c?Blockly.PHP.valueToCode(a,b,Blockly.PHP.ORDER_ADDITION)||f:0>c?Blockly.PHP.valueToCode(a,b,Blockly.PHP.ORDER_SUBTRACTION)||f:d?Blockly.PHP.valueToCode(a,b,Blockly.PHP.ORDER_UNARY_NEGATION)||f:Blockly.PHP.valueToCode(a,b,e)||f;if(Blockly.isNumber(a))a=parseFloat(a)+c,d&&(a=-a);else{if(0<c){a=a+" + "+c;var g=Blockly.PHP.ORDER_ADDITION}else 0>c&&
 (a=a+" - "+-c,g=Blockly.PHP.ORDER_SUBTRACTION);d&&(a=c?"-("+a+")":"-"+a,g=Blockly.PHP.ORDER_UNARY_NEGATION);g=Math.floor(g);e=Math.floor(e);g&&e>=g&&(a="("+a+")")}return a};Blockly.PHP.colour={};Blockly.PHP.colour_picker=function(a){return["'"+a.getFieldValue("COLOUR")+"'",Blockly.PHP.ORDER_ATOMIC]};Blockly.PHP.colour_random=function(a){return[Blockly.PHP.provideFunction_("colour_random",["function "+Blockly.PHP.FUNCTION_NAME_PLACEHOLDER_+"() {","  return '#' . str_pad(dechex(mt_rand(0, 0xFFFFFF)), 6, '0', STR_PAD_LEFT);","}"])+"()",Blockly.PHP.ORDER_FUNCTION_CALL]};
 Blockly.PHP.colour_rgb=function(a){var b=Blockly.PHP.valueToCode(a,"RED",Blockly.PHP.ORDER_COMMA)||0,c=Blockly.PHP.valueToCode(a,"GREEN",Blockly.PHP.ORDER_COMMA)||0;a=Blockly.PHP.valueToCode(a,"BLUE",Blockly.PHP.ORDER_COMMA)||0;return[Blockly.PHP.provideFunction_("colour_rgb",["function "+Blockly.PHP.FUNCTION_NAME_PLACEHOLDER_+"($r, $g, $b) {","  $r = round(max(min($r, 100), 0) * 2.55);","  $g = round(max(min($g, 100), 0) * 2.55);","  $b = round(max(min($b, 100), 0) * 2.55);","  $hex = '#';","  $hex .= str_pad(dechex($r), 2, '0', STR_PAD_LEFT);",
diff --git a/python_compressed.js b/python_compressed.js
index 92000d619..66959ddd6 100644
--- a/python_compressed.js
+++ b/python_compressed.js
@@ -10,8 +10,8 @@ Blockly.Python.init=function(a){Blockly.Python.PASS=this.INDENT+"pass\n";Blockly
 " = None");a=Blockly.Variables.allUsedVarModels(a);for(d=0;d<a.length;d++)b.push(Blockly.Python.variableDB_.getName(a[d].getId(),Blockly.Variables.NAME_TYPE)+" = None");Blockly.Python.definitions_.variables=b.join("\n")};
 Blockly.Python.finish=function(a){var b=[],c=[],d;for(d in Blockly.Python.definitions_){var e=Blockly.Python.definitions_[d];e.match(/^(from\s+\S+\s+)?import\s+\S+/)?b.push(e):c.push(e)}delete Blockly.Python.definitions_;delete Blockly.Python.functionNames_;Blockly.Python.variableDB_.reset();return(b.join("\n")+"\n\n"+c.join("\n\n")).replace(/\n\n+/g,"\n\n").replace(/\n*$/,"\n\n\n")+a};Blockly.Python.scrubNakedValue=function(a){return a+"\n"};
 Blockly.Python.quote_=function(a){a=a.replace(/\\/g,"\\\\").replace(/\n/g,"\\\n");var b="'";-1!==a.indexOf("'")&&(-1===a.indexOf('"')?b='"':a=a.replace(/'/g,"\\'"));return b+a+b};
-Blockly.Python.scrub_=function(a,b){var c="";if(!a.outputConnection||!a.outputConnection.targetConnection){var d=a.getCommentText();(d=Blockly.utils.wrap(d,Blockly.Python.COMMENT_WRAP-3))&&(c=a.getProcedureDef?c+('"""'+d+'\n"""\n'):c+Blockly.Python.prefixLines(d+"\n","# "));for(var e=0;e<a.inputList.length;e++)a.inputList[e].type==Blockly.INPUT_VALUE&&(d=a.inputList[e].connection.targetBlock())&&(d=Blockly.Python.allNestedComments(d))&&(c+=Blockly.Python.prefixLines(d,"# "))}e=a.nextConnection&&a.nextConnection.targetBlock();
-e=Blockly.Python.blockToCode(e);return c+b+e};Blockly.Python.getAdjustedInt=function(a,b,c,d){c=c||0;a.workspace.options.oneBasedIndex&&c--;var e=a.workspace.options.oneBasedIndex?"1":"0";a=Blockly.Python.valueToCode(a,b,c?Blockly.Python.ORDER_ADDITIVE:Blockly.Python.ORDER_NONE)||e;Blockly.isNumber(a)?(a=parseInt(a,10)+c,d&&(a=-a)):(a=0<c?"int("+a+" + "+c+")":0>c?"int("+a+" - "+-c+")":"int("+a+")",d&&(a="-"+a));return a};Blockly.Python.colour={};Blockly.Python.colour_picker=function(a){return["'"+a.getFieldValue("COLOUR")+"'",Blockly.Python.ORDER_ATOMIC]};Blockly.Python.colour_random=function(a){Blockly.Python.definitions_.import_random="import random";return["'#%06x' % random.randint(0, 2**24 - 1)",Blockly.Python.ORDER_FUNCTION_CALL]};
+Blockly.Python.scrub_=function(a,b,c){var d="";if(!a.outputConnection||!a.outputConnection.targetConnection){var e=a.getCommentText();(e=Blockly.utils.wrap(e,Blockly.Python.COMMENT_WRAP-3))&&(d=a.getProcedureDef?d+('"""'+e+'\n"""\n'):d+Blockly.Python.prefixLines(e+"\n","# "));for(var f=0;f<a.inputList.length;f++)a.inputList[f].type==Blockly.INPUT_VALUE&&(e=a.inputList[f].connection.targetBlock())&&(e=Blockly.Python.allNestedComments(e))&&(d+=Blockly.Python.prefixLines(e,"# "))}a=a.nextConnection&&
+a.nextConnection.targetBlock();c=c?"":Blockly.Python.blockToCode(a);return d+b+c};Blockly.Python.getAdjustedInt=function(a,b,c,d){c=c||0;a.workspace.options.oneBasedIndex&&c--;var e=a.workspace.options.oneBasedIndex?"1":"0";a=Blockly.Python.valueToCode(a,b,c?Blockly.Python.ORDER_ADDITIVE:Blockly.Python.ORDER_NONE)||e;Blockly.isNumber(a)?(a=parseInt(a,10)+c,d&&(a=-a)):(a=0<c?"int("+a+" + "+c+")":0>c?"int("+a+" - "+-c+")":"int("+a+")",d&&(a="-"+a));return a};Blockly.Python.colour={};Blockly.Python.colour_picker=function(a){return["'"+a.getFieldValue("COLOUR")+"'",Blockly.Python.ORDER_ATOMIC]};Blockly.Python.colour_random=function(a){Blockly.Python.definitions_.import_random="import random";return["'#%06x' % random.randint(0, 2**24 - 1)",Blockly.Python.ORDER_FUNCTION_CALL]};
 Blockly.Python.colour_rgb=function(a){var b=Blockly.Python.provideFunction_("colour_rgb",["def "+Blockly.Python.FUNCTION_NAME_PLACEHOLDER_+"(r, g, b):","  r = round(min(100, max(0, r)) * 2.55)","  g = round(min(100, max(0, g)) * 2.55)","  b = round(min(100, max(0, b)) * 2.55)","  return '#%02x%02x%02x' % (r, g, b)"]),c=Blockly.Python.valueToCode(a,"RED",Blockly.Python.ORDER_NONE)||0,d=Blockly.Python.valueToCode(a,"GREEN",Blockly.Python.ORDER_NONE)||0;a=Blockly.Python.valueToCode(a,"BLUE",Blockly.Python.ORDER_NONE)||
 0;return[b+"("+c+", "+d+", "+a+")",Blockly.Python.ORDER_FUNCTION_CALL]};
 Blockly.Python.colour_blend=function(a){var b=Blockly.Python.provideFunction_("colour_blend",["def "+Blockly.Python.FUNCTION_NAME_PLACEHOLDER_+"(colour1, colour2, ratio):","  r1, r2 = int(colour1[1:3], 16), int(colour2[1:3], 16)","  g1, g2 = int(colour1[3:5], 16), int(colour2[3:5], 16)","  b1, b2 = int(colour1[5:7], 16), int(colour2[5:7], 16)","  ratio = min(1, max(0, ratio))","  r = round(r1 * (1 - ratio) + r2 * ratio)","  g = round(g1 * (1 - ratio) + g2 * ratio)","  b = round(b1 * (1 - ratio) + b2 * ratio)",
diff --git a/tests/mocha/block_test.js b/tests/mocha/block_test.js
new file mode 100644
index 000000000..12c7871ef
--- /dev/null
+++ b/tests/mocha/block_test.js
@@ -0,0 +1,182 @@
+
+// Declare some globals to make eslint happier.
+// TODO: make an eslint config that applies to this directory and put this
+// configuration in that file, instead of inline.
+/* global suite, test, setup, teardown */
+
+/* global assertNull, assertEquals */
+
+suite('Blocks', function() {
+
+  suite('Unplug', function() {
+    function assertUnpluggedNoheal(blocks) {
+      // A has nothing connected to it.
+      assertEquals(0, blocks.A.getChildren().length);
+      // B and C are still connected.
+      assertEquals(blocks.B, blocks.C.getParent());
+      // B is the top of its stack.
+      assertNull(blocks.B.getParent());
+    }
+
+    function assertUnpluggedHealed(blocks) {
+      // A and C are connected.
+      assertEquals(1, blocks.A.getChildren().length);
+      assertEquals(blocks.A, blocks.C.getParent());
+      // B has nothing connected to it.
+      assertEquals(0, blocks.B.getChildren().length);
+      // B is the top of its stack.
+      assertNull(blocks.B.getParent());
+    }
+
+    setup(function() {
+      Blockly.defineBlocksWithJsonArray([{
+        "type": "stack_block",
+        "message0": "",
+        "previousStatement": null,
+        "nextStatement": null
+      },
+      {
+        "type": "row_block",
+        "message0": "%1",
+        "args0": [
+          {
+            "type": "input_value",
+            "name": "INPUT"
+          }
+        ],
+        "output": null
+      }]);
+
+      this.workspace = new Blockly.Workspace();
+    });
+
+    teardown(function() {
+      delete Blockly.Blocks['stack_block'];
+      delete Blockly.Blocks['row_block'];
+
+      this.workspace.dispose();
+    });
+
+    suite('Row', function() {
+      setup(function() {
+        var blockA = this.workspace.newBlock('row_block');
+        var blockB = this.workspace.newBlock('row_block');
+        var blockC = this.workspace.newBlock('row_block');
+
+        blockA.inputList[0].connection.connect(blockB.outputConnection);
+        blockB.inputList[0].connection.connect(blockC.outputConnection);
+
+        assertEquals(blockB, blockC.getParent());
+
+        this.blocks = {
+          A: blockA,
+          B: blockB,
+          C: blockC
+        };
+      });
+
+      test('Don\'t heal', function() {
+        this.blocks.B.unplug(false);
+        assertUnpluggedNoheal(this.blocks);
+      });
+
+      test('Heal', function() {
+        this.blocks.B.unplug(true);
+        // Each block has only one input, and the types work.
+        assertUnpluggedHealed(this.blocks);
+      });
+
+      test('Heal with bad checks', function() {
+        var blocks = this.blocks;
+
+        // A and C can't connect, but both can connect to B.
+        blocks.A.inputList[0].connection.setCheck('type1');
+        blocks.C.outputConnection.setCheck('type2');
+
+        // Each block has only one input, but the types don't work.
+        blocks.B.unplug(true);
+        assertUnpluggedNoheal(blocks);
+      });
+
+      test('Parent has multiple inputs', function() {
+        var blocks = this.blocks;
+        // Add extra input to parent
+        blocks.A.appendValueInput("INPUT").setCheck(null);
+        blocks.B.unplug(true);
+        assertUnpluggedHealed(blocks);
+      });
+
+      test('Middle block has multiple inputs', function() {
+        var blocks = this.blocks;
+        // Add extra input to middle block
+        blocks.B.appendValueInput("INPUT").setCheck(null);
+        blocks.B.unplug(true);
+        assertUnpluggedNoheal(blocks);
+      });
+
+      test('Child block has multiple inputs', function() {
+        var blocks = this.blocks;
+        // Add extra input to child block
+        blocks.C.appendValueInput("INPUT").setCheck(null);
+        // Child block input count doesn't matter.
+        blocks.B.unplug(true);
+        assertUnpluggedHealed(blocks);
+      });
+    });
+
+
+    suite('Stack', function() {
+      setup(function() {
+        var blockA = this.workspace.newBlock('stack_block');
+        var blockB = this.workspace.newBlock('stack_block');
+        var blockC = this.workspace.newBlock('stack_block');
+
+        blockA.nextConnection.connect(blockB.previousConnection);
+        blockB.nextConnection.connect(blockC.previousConnection);
+
+        assertEquals(blockB, blockC.getParent());
+
+        this.blocks = {
+          A: blockA,
+          B: blockB,
+          C: blockC
+        };
+      });
+
+      test('Don\'t heal', function() {
+        this.blocks.B.unplug();
+        assertUnpluggedNoheal(this.blocks);
+      });
+
+      test('Heal', function() {
+        this.blocks.B.unplug(true);
+        assertUnpluggedHealed(this.blocks);
+      });
+
+      test('Heal with bad checks', function() {
+        var blocks = this.blocks;
+        // A and C can't connect, but both can connect to B.
+        blocks.A.nextConnection.setCheck('type1');
+        blocks.C.previousConnection.setCheck('type2');
+
+        // The types don't work.
+        blocks.B.unplug(true);
+
+        // Stack blocks unplug before checking whether the types match.
+        // TODO (#1994): Check types before unplugging.
+        // A has nothing connected to it.
+        assertEquals(0, blocks.A.getChildren().length);
+        // B has nothing connected to it.
+        assertEquals(0, blocks.B.getChildren().length);
+        // C has nothing connected to it.
+        assertEquals(0, blocks.C.getChildren().length);
+        // A is the top of its stack.
+        assertNull(blocks.A.getParent());
+        // B is the top of its stack.
+        assertNull(blocks.B.getParent());
+        // C is the top of its stack.
+        assertNull(blocks.C.getParent());
+      });
+    });
+  });
+});
diff --git a/tests/mocha/event_test.js b/tests/mocha/event_test.js
new file mode 100644
index 000000000..fc836774f
--- /dev/null
+++ b/tests/mocha/event_test.js
@@ -0,0 +1,386 @@
+
+// Declare some globals to make eslint happier.
+// TODO: make an eslint config that applies to this directory and put this
+// configuration in that file, instead of inline.
+/* global suite, test, setup, teardown */
+/* global sinon */
+
+/* global assertNotNull, assertNotUndefined, assertNull, assertEquals,
+   isEqualArrays, assertUndefined */
+suite('Events', function() {
+  setup(function() {
+    this.workspace = new Blockly.Workspace();
+    Blockly.defineBlocksWithJsonArray([{
+      'type': 'field_variable_test_block',
+      'message0': '%1',
+      'args0': [
+        {
+          'type': 'field_variable',
+          'name': 'VAR',
+          'variable': 'item'
+        }
+      ],
+    },
+    {
+      'type': 'simple_test_block',
+      'message0': 'simple test block'
+    }]);
+  });
+
+  teardown(function() {
+    delete Blockly.Blocks['field_variable_test_block'];
+    delete Blockly.Blocks['simple_test_block'];
+    this.workspace.dispose();
+
+    // Clear Blockly.Event state.
+    Blockly.Events.setGroup(false);
+    Blockly.Events.disabled_ = 0;
+  });
+
+  function checkExactEventValues(event, values) {
+    var keys = Object.keys(values);
+    for (var i = 0, field; field = keys[i]; i++) {
+      assertEquals(values[field], event[field]);
+    }
+  }
+
+  function checkCreateEventValues(event, block, ids, type) {
+    var expected_xml = Blockly.Xml.domToText(Blockly.Xml.blockToDom(block));
+    var result_xml = Blockly.Xml.domToText(event.xml);
+    assertEquals(expected_xml, result_xml);
+    isEqualArrays(ids, event.ids);
+    assertEquals(type, event.type);
+  }
+
+  function checkDeleteEventValues(event, block, ids, type) {
+    var expected_xml = Blockly.Xml.domToText(Blockly.Xml.blockToDom(block));
+    var result_xml = Blockly.Xml.domToText(event.oldXml);
+    assertEquals(expected_xml, result_xml);
+    isEqualArrays(ids, event.ids);
+    assertEquals(type, event.type);
+  }
+
+  suite('Constructors', function() {
+    test('Abstract', function() {
+      var event = new Blockly.Events.Abstract();
+      assertUndefined(event.blockId);
+      assertUndefined(event.workspaceId);
+      assertUndefined(event.varId);
+      checkExactEventValues(event, {'group': '', 'recordUndo': true});
+    });
+
+    test('UI event without block', function() {
+      Blockly.Events.setGroup('testGroup');
+      var event = new Blockly.Events.Ui(null, 'foo', 'bar', 'baz');
+      checkExactEventValues(event,
+          {
+            'blockId': null,
+            'workspaceId': null,
+            'type': 'ui',
+            'oldValue': 'bar',
+            'newValue': 'baz',
+            'element': 'foo',
+            'recordUndo': false,
+            'group': 'testGroup'
+          });
+    });
+
+    suite('With simple blocks', function() {
+      setup(function() {
+        this.FAKE_ID = 'hedgehog';
+        sinon.stub(Blockly.utils, "genUid").returns(this.FAKE_ID);
+
+        // Disable events while constructing the block: this is a test of the
+        // Blockly.Event constructors, not the block constructor.
+        Blockly.Events.disable();
+        this.block = new Blockly.Block(this.workspace, 'simple_test_block');
+        Blockly.Events.enable();
+        sinon.restore();
+      });
+
+      teardown(function() {
+      });
+
+      test('Block base', function() {
+        var event = new Blockly.Events.BlockBase(this.block);
+        assertUndefined(event.varId);
+        checkExactEventValues(event,
+            {
+              'blockId': this.FAKE_ID,
+              'workspaceId': this.workspace.id,
+              'group': '',
+              'recordUndo': true
+            });
+      });
+
+      test('Create', function() {
+        var event = new Blockly.Events.Create(this.block);
+        checkCreateEventValues(event, this.block, [this.FAKE_ID], 'create');
+      });
+
+      test('Block create', function() {
+        var event = new Blockly.Events.BlockCreate(this.block);
+        checkCreateEventValues(event, this.block, [this.FAKE_ID], 'create');
+      });
+
+      test('Delete', function() {
+        var event = new Blockly.Events.Delete(this.block);
+        checkDeleteEventValues(event, this.block, [this.FAKE_ID], 'delete');
+      });
+
+      test('Block delete', function() {
+        var event = new Blockly.Events.BlockDelete(this.block);
+        checkDeleteEventValues(event, this.block, [this.FAKE_ID], 'delete');
+      });
+
+      test('UI event with block', function() {
+        Blockly.Events.setGroup('testGroup');
+        var event = new Blockly.Events.Ui(this.block, 'foo', 'bar', 'baz');
+        checkExactEventValues(event,
+            {
+              'blockId': this.FAKE_ID,
+              'workspaceId': this.workspace.id,
+              'type': 'ui',
+              'oldValue': 'bar',
+              'newValue': 'baz',
+              'element': 'foo',
+              'recordUndo': false,
+              'group': 'testGroup'
+            });
+      });
+
+      suite('Move', function() {
+        test('Move by coordinate', function() {
+          var coordinate = new goog.math.Coordinate(3, 4);
+          this.block.xy_ = coordinate;
+
+          var event = new Blockly.Events.Move(this.block);
+          checkExactEventValues(event,
+              {'oldCoordinate': coordinate, 'type': 'move'});
+        });
+
+        test('Block move by coordinate', function() {
+          var coordinate = new goog.math.Coordinate(3, 4);
+          this.block.xy_ = coordinate;
+
+          var event = new Blockly.Events.BlockMove(this.block);
+          checkExactEventValues(event,
+              {'oldCoordinate': coordinate, 'type': 'move'});
+        });
+
+        suite('Move by parent', function() {
+          setup(function() {
+            sinon.stub(Blockly.utils, "genUid").returns("parent");
+            Blockly.Events.disable();
+            this.parentBlock = new Blockly.Block(this.workspace, 'simple_test_block');
+            Blockly.Events.enable();
+            sinon.restore();
+
+            this.block.parentBlock_ = this.parentBlock;
+            this.block.xy_ = new goog.math.Coordinate(3, 4);
+          });
+
+          teardown(function() {
+            this.block.parentBlock_ = null;
+          });
+
+          test('Move by parent', function() {
+            // Expect the oldParentId to be set but not the oldCoordinate to be set.
+            var event = new Blockly.Events.Move(this.block);
+            checkExactEventValues(event, {'oldCoordinate': undefined,
+              'oldParentId': 'parent', 'type': 'move'});
+          });
+
+          test('Block move by parent', function() {
+            // Expect the oldParentId to be set but not the oldCoordinate to be set.
+            var event = new Blockly.Events.BlockMove(this.block);
+            checkExactEventValues(event, {'oldCoordinate': undefined,
+              'oldParentId': 'parent', 'type': 'move'});
+          });
+        });
+      });
+    });
+
+    suite('With variable getter blocks', function() {
+      setup(function() {
+        // Disable events while constructing the block: this is a test of the
+        // Blockly.Event constructors, not the block constructor.
+        Blockly.Events.disable();
+        this.block = new Blockly.Block(this.workspace, 'field_variable_test_block');
+        Blockly.Events.enable();
+      });
+
+      teardown(function() {
+
+      });
+
+      test('Change', function() {
+        var event =
+            new Blockly.Events.Change(this.block, 'field', 'VAR', 'id1', 'id2');
+        checkExactEventValues(event, {'element': 'field', 'name': 'VAR',
+          'oldValue': 'id1', 'newValue': 'id2', 'type': 'change'});
+      });
+
+      test('Block change', function() {
+        var event = new Blockly.Events.BlockChange(
+            this.block, 'field', 'VAR', 'id1', 'id2');
+        checkExactEventValues(event, {'element': 'field', 'name': 'VAR',
+          'oldValue': 'id1', 'newValue': 'id2', 'type': 'change'});
+      });
+    });
+  });
+
+  suite('Variable events', function() {
+    setup(function() {
+      this.variable = this.workspace.createVariable('name1', 'type1', 'id1');
+    });
+
+    /**
+     * Check if a variable with the given values exists.
+     * @param {Blockly.Workspace|Blockly.VariableMap} container The workspace  or
+     *     variableMap the checked variable belongs to.
+     * @param {!string} name The expected name of the variable.
+     * @param {!string} type The expected type of the variable.
+     * @param {!string} id The expected id of the variable.
+     */
+    function checkVariableValues(container, name, type, id) {
+      var variable = container.getVariableById(id);
+      assertNotUndefined(variable);
+      assertEquals(name, variable.name);
+      assertEquals(type, variable.type);
+      assertEquals(id, variable.getId());
+    }
+    suite('Constructors', function() {
+      test('Var base', function() {
+        var event = new Blockly.Events.VarBase(this.variable);
+        assertUndefined(event.blockId);
+        checkExactEventValues(event, {'varId': 'id1',
+          'workspaceId': this.workspace.id, 'group': '', 'recordUndo': true});
+      });
+
+      test('Var create', function() {
+        var event = new Blockly.Events.VarCreate(this.variable);
+        checkExactEventValues(event, {'varName': 'name1', 'varType': 'type1',
+          'type': 'var_create'});
+      });
+
+      test('Var delete', function() {
+        var event = new Blockly.Events.VarDelete(this.variable);
+        checkExactEventValues(event, {'varName': 'name1', 'varType': 'type1',
+          'varId':'id1', 'type': 'var_delete'});
+      });
+
+      test('Var rename', function() {
+        var event = new Blockly.Events.VarRename(this.variable, 'name2');
+        checkExactEventValues(event, {'varId': 'id1', 'oldName': 'name1',
+          'newName': 'name2', 'type': 'var_rename'});
+      });
+    });
+
+    suite('fromJson', function() {
+      test('Var create', function() {
+        var event = new Blockly.Events.VarCreate(this.variable);
+        var event2 = new Blockly.Events.VarCreate(null);
+        var json = event.toJson();
+        event2.fromJson(json);
+
+        assertEquals(JSON.stringify(json), JSON.stringify(event2.toJson()));
+      });
+      test('Var delete', function() {
+        var event = new Blockly.Events.VarDelete(this.variable);
+        var event2 = new Blockly.Events.VarDelete(null);
+        var json = event.toJson();
+        event2.fromJson(json);
+
+        assertEquals(JSON.stringify(json), JSON.stringify(event2.toJson()));
+      });
+      test('Var rename', function() {
+        var event = new Blockly.Events.VarRename(this.variable, '');
+        var event2 = new Blockly.Events.VarRename(null);
+        var json = event.toJson();
+        event2.fromJson(json);
+
+        assertEquals(JSON.stringify(json), JSON.stringify(event2.toJson()));
+      });
+    });
+
+    suite('toJson', function() {
+      test('Var create', function() {
+        var variable = this.workspace.createVariable('name1', 'type1', 'id1');
+        var event = new Blockly.Events.VarCreate(variable);
+        var json = event.toJson();
+        var expectedJson = ({type: "var_create", varId: "id1", varType: "type1",
+          varName: "name1"});
+
+        assertEquals(JSON.stringify(expectedJson), JSON.stringify(json));
+      });
+
+      test('Var delete', function() {
+        var event = new Blockly.Events.VarDelete(this.variable);
+        var json = event.toJson();
+        var expectedJson = ({type: "var_delete", varId: "id1", varType: "type1",
+          varName: "name1"});
+
+        assertEquals(JSON.stringify(expectedJson), JSON.stringify(json));
+      });
+
+      test('Var rename', function() {
+        var event = new Blockly.Events.VarRename(this.variable, 'name2');
+        var json = event.toJson();
+        var expectedJson = ({type: "var_rename", varId: "id1", oldName: "name1",
+          newName: "name2"});
+
+        assertEquals(JSON.stringify(expectedJson), JSON.stringify(json));
+      });
+    });
+
+    suite.skip('Run Forward', function() {
+      test('Var create', function() {
+        var json = {type: "var_create", varId: "id1", varType: "type1",
+          varName: "name1"};
+        var event = Blockly.Events.fromJson(json, this.workspace);
+        assertNull(this.workspace.getVariableById('id1'));
+        event.run(true);
+        checkVariableValues(this.workspace, 'name1', 'type1', 'id1');
+      });
+
+      test('Var delete', function() {
+        var event = new Blockly.Events.VarDelete(this.variable);
+        assertNotNull(this.workspace.getVariableById('id1'));
+        event.run(true);
+        assertNull(this.workspace.getVariableById('id1'));
+      });
+
+      test('Var rename', function() {
+        var event = new Blockly.Events.VarRename(this.variable, 'name2');
+        event.run(true);
+        assertNull(this.workspace.getVariable('name1'));
+        checkVariableValues(this.workspace, 'name2', 'type1', 'id1');
+      });
+    });
+    suite.skip('Run Backward', function() {
+      test('Var create', function() {
+        var variable = this.workspace.createVariable('name1', 'type1', 'id1');
+        var event = new Blockly.Events.VarCreate(variable);
+        assertNotNull(this.workspace.getVariableById('id1'));
+        event.run(false);
+      });
+
+      test('Var delete', function() {
+        var json = {type: "var_delete", varId: "id1", varType: "type1",
+          varName: "name1"};
+        var event = Blockly.Events.fromJson(json, this.workspace);
+        assertNull(this.workspace.getVariableById('id1'));
+        event.run(false);
+        checkVariableValues(this.workspace, 'name1', 'type1', 'id1');
+      });
+
+      test('Var rename', function() {
+        var event = new Blockly.Events.VarRename(this.variable, 'name2');
+        event.run(false);
+        assertNull(this.workspace.getVariable('name2'));
+        checkVariableValues(this.workspace, 'name1', 'type1', 'id1');
+      });
+    });
+  });
+});
diff --git a/tests/mocha/field_variable_test.js b/tests/mocha/field_variable_test.js
new file mode 100644
index 000000000..622c5c1eb
--- /dev/null
+++ b/tests/mocha/field_variable_test.js
@@ -0,0 +1,161 @@
+
+// Declare some globals to make eslint happier.
+// TODO: make an eslint config that applies to this directory and put this
+// configuration in that file, instead of inline.
+/* global suite, test, chai, setup, teardown */
+
+/* global assertNull, assertEquals, isEqualArrays */
+
+suite('Variable Fields', function() {
+  function getMockBlock(workspace) {
+    return {
+      'workspace': workspace,
+      'isShadow': function() {
+        return false;
+      }
+    };
+  }
+  function fieldVariable_createAndInitField(workspace) {
+    var fieldVariable = new Blockly.FieldVariable('name1');
+    var mockBlock = getMockBlock(workspace);
+    fieldVariable.setSourceBlock(mockBlock);
+    // No view to initialize, but still need to init the model.
+    fieldVariable.initModel();
+    return fieldVariable;
+  }
+
+  setup(function() {
+    this.workspace = new Blockly.Workspace();
+  });
+  teardown(function() {
+    this.workspace.dispose();
+  });
+
+  test('Constructor', function() {
+    var fieldVariable = new Blockly.FieldVariable('name1');
+    // The field does not have a variable until after init() is called.
+    assertEquals('', fieldVariable.getText());
+    assertNull(fieldVariable.getValue());
+  });
+
+  test('Set value by ID', function() {
+    this.workspace.createVariable('name2', null, 'id2');
+
+    var fieldVariable = fieldVariable_createAndInitField(this.workspace);
+    var oldId = fieldVariable.getValue();
+
+    fieldVariable.setValue('id2');
+    // Setting value by ID gives us the right text as well.
+    assertEquals('name2', fieldVariable.getText());
+    assertEquals('id2', fieldVariable.getValue());
+    chai.assert.notEqual(oldId, fieldVariable.getValue());
+  });
+
+  test('Set value: variable does not exist', function() {
+    var fieldVariable = fieldVariable_createAndInitField(this.workspace);
+    chai.assert.throws(function() {
+      fieldVariable.setValue('id1');
+    });
+  });
+
+  test('Dropdown contains variables', function() {
+    // Expect that the dropdown options will contain the variables that exist
+    this.workspace.createVariable('name1', '', 'id1');
+    this.workspace.createVariable('name2', '', 'id2');
+    var fieldVariable = fieldVariable_createAndInitField(this.workspace);
+
+    // Expect that variables created after field creation will show up too.
+    this.workspace.createVariable('name3', '', 'id3');
+
+    var result_options = Blockly.FieldVariable.dropdownCreate.call(
+        fieldVariable);
+
+    // Expect three variable options and a rename option.
+    assertEquals(result_options.length, 4);
+    isEqualArrays(result_options[0], ['name1', 'id1']);
+    isEqualArrays(result_options[1], ['name2', 'id2']);
+    isEqualArrays(result_options[2], ['name3', 'id3']);
+
+  });
+
+  suite('Get variable types', function() {
+    setup(function() {
+      this.workspace.createVariable('name1', 'type1');
+      this.workspace.createVariable('name2', 'type2');
+    });
+
+    test('variableTypes is undefined', function() {
+      // Expect that since variableTypes is undefined, only type empty string
+      // will be returned (regardless of what types are available on the workspace).
+      var fieldVariable = new Blockly.FieldVariable('name1');
+      var resultTypes = fieldVariable.getVariableTypes_();
+      isEqualArrays(resultTypes, ['']);
+    });
+
+    test('variableTypes is explicit', function() {
+      // Expect that since variableTypes is defined, it will be the return
+      // value, regardless of what types are available on the workspace.
+      var fieldVariable = new Blockly.FieldVariable(
+          'name1', null, ['type1', 'type2'], 'type1');
+      var resultTypes = fieldVariable.getVariableTypes_();
+      isEqualArrays(resultTypes, ['type1', 'type2']);
+      assertEquals('Default type was wrong', 'type1',
+          fieldVariable.defaultType_);
+    });
+
+    test('variableTypes is null', function() {
+      // Expect all variable types to be returned.
+      // The field does not need to be initialized to do this--it just needs
+      // a pointer to the workspace.
+      var fieldVariable = new Blockly.FieldVariable('name1');
+      var mockBlock = getMockBlock(this.workspace);
+      fieldVariable.setSourceBlock(mockBlock);
+      fieldVariable.variableTypes = null;
+
+      var resultTypes = fieldVariable.getVariableTypes_();
+      // The empty string is always one of the options.
+      isEqualArrays(resultTypes, ['type1', 'type2', '']);
+    });
+
+    test('variableTypes is the empty list', function() {
+      var fieldVariable = new Blockly.FieldVariable('name1');
+      var mockBlock = getMockBlock(this.workspace);
+      fieldVariable.setSourceBlock(mockBlock);
+      fieldVariable.variableTypes = [];
+
+      chai.assert.throws(function() {
+        fieldVariable.getVariableTypes_();
+      });
+    });
+  });
+
+  suite('Default types', function() {
+    test('Default type exists', function() {
+      var fieldVariable = new Blockly.FieldVariable(null, null, ['b'], 'b');
+      assertEquals('The variable field\'s default type should be "b"',
+          'b', fieldVariable.defaultType_);
+    });
+
+    test('No default type', function() {
+      var fieldVariable = new Blockly.FieldVariable(null);
+      assertEquals('The variable field\'s default type should be the empty string',
+          '', fieldVariable.defaultType_);
+      assertNull('The variable field\'s allowed types should be null',
+          fieldVariable.variableTypes);
+    });
+
+    test('Default type mismatch', function() {
+      // Invalid default type when creating a variable field.
+      chai.assert.throws(function() {
+        var _fieldVariable = new Blockly.FieldVariable(null, null, ['a'], 'b');
+      });
+    });
+
+    test('Default type mismatch with empty array', function() {
+      // Invalid default type when creating a variable field.
+      chai.assert.throws(function() {
+        var _fieldVariable = new Blockly.FieldVariable(null, null, ['a']);
+      });
+    });
+  });
+});
diff --git a/tests/mocha/index.html b/tests/mocha/index.html
new file mode 100644
index 000000000..6dcef5ce6
--- /dev/null
+++ b/tests/mocha/index.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Mocha Tests for Blockly</title>
+
+    <link href="https://unpkg.com/mocha@5.2.0/mocha.css" rel="stylesheet" />
+    <script src="../../blockly_uncompressed.js"></script>
+  </head>
+  <body>
+
+    <div id="mocha"></div>
+    <script src="https://unpkg.com/chai/chai.js"></script>
+    <script src="https://unpkg.com/mocha@5.2.0/mocha.js"></script>
+    <script src="https://unpkg.com/sinon/pkg/sinon.js"></script>
+    <script>
+      mocha.setup({
+        ui: 'tdd'
+      });
+    </script>
+    <script src="test_helpers.js"></script>
+    <script src="block_test.js"></script>
+    <script src="event_test.js"></script>
+    <script src="field_variable_test.js"></script>
+    <script src="utils_test.js"></script>
+
+    <script>
+      mocha.run();
+    </script>
+  </body>
+</html>
diff --git a/tests/mocha/mocha.opts b/tests/mocha/mocha.opts
new file mode 100644
index 000000000..b0986b141
--- /dev/null
+++ b/tests/mocha/mocha.opts
@@ -0,0 +1,3 @@
+--ui tdd
+--file ../blockly_uncompressed.js
+--reporter landing
diff --git a/tests/mocha/test_helpers.js b/tests/mocha/test_helpers.js
new file mode 100644
index 000000000..0f0899231
--- /dev/null
+++ b/tests/mocha/test_helpers.js
@@ -0,0 +1,109 @@
+/* global chai */
+/* exported assertEquals, assertTrue, assertFalse, assertNull, assertNotNull,
+   isEqualArrays, assertUndefined, assertNotUndefined */
+function _argumentsIncludeComments(expectedNumberOfNonCommentArgs, args) {
+  return args.length == expectedNumberOfNonCommentArgs + 1;
+}
+
+function _commentArg(expectedNumberOfNonCommentArgs, args) {
+  if (_argumentsIncludeComments(expectedNumberOfNonCommentArgs, args)) {
+    return args[0];
+  }
+
+  return null;
+}
+
+function _nonCommentArg(desiredNonCommentArgIndex, expectedNumberOfNonCommentArgs, args) {
+  return _argumentsIncludeComments(expectedNumberOfNonCommentArgs, args) ?
+      args[desiredNonCommentArgIndex] :
+      args[desiredNonCommentArgIndex - 1];
+}
+
+function _validateArguments(expectedNumberOfNonCommentArgs, args) {
+  if (!( args.length == expectedNumberOfNonCommentArgs ||
+      (args.length == expectedNumberOfNonCommentArgs + 1 && (typeof(args[0]) == 'string') || args[0] == null))) {
+    throw new Error('Incorrect arguments passed to assert function');
+  }
+}
+/**
+ * Converts from JSUnit assertEquals to chai.assert.equal.
+ */
+function assertEquals() {
+  _validateArguments(2, arguments);
+  var var1 = _nonCommentArg(1, 2, arguments);
+  var var2 = _nonCommentArg(2, 2, arguments);
+  var comment = _commentArg(2, arguments);
+  chai.assert.equal(var1, var2, comment);
+}
+
+/**
+ * Converts from JSUnit assertTrue to chai.assert.isTrue.
+ */
+function assertTrue() {
+  _validateArguments(1, arguments);
+  var commentArg = _commentArg(1, arguments);
+  var booleanValue = _nonCommentArg(1, 1, arguments);
+  if (typeof(booleanValue) != 'boolean') {
+    throw new Error('Bad argument to assertTrue(boolean)');
+  }
+
+  chai.assert.isTrue(booleanValue, commentArg);
+}
+
+/**
+ * Converts from JSUnit assertFalse to chai.assert.isNotTrue.
+ */
+function assertFalse() {
+  _validateArguments(1, arguments);
+  var commentArg = _commentArg(1, arguments);
+  var booleanValue = _nonCommentArg(1, 1, arguments);
+
+  if (typeof(booleanValue) != 'boolean') {
+    throw new Error('Bad argument to assertFalse(boolean)');
+  }
+
+  chai.assert.isNotTrue(booleanValue, commentArg);
+}
+
+/**
+ * Converts from JSUnit assertNull to chai.assert.isNull.
+ */
+function assertNull() {
+  _validateArguments(1, arguments);
+  var commentArg = _commentArg(1, arguments);
+  var val = _nonCommentArg(1, 1, arguments);
+  chai.assert.isNull(val, commentArg);
+}
+
+function assertNotNull() {
+  _validateArguments(1, arguments);
+  var commentArg = _commentArg(1, arguments);
+  var val = _nonCommentArg(1, 1, arguments);
+  chai.assert.isNotNull(val, commentArg);
+}
+
+/**
+ * Check that two arrays have the same content.
+ * @param {!Array.<string>} array1 The first array.
+ * @param {!Array.<string>} array2 The second array.
+ */
+function isEqualArrays(array1, array2) {
+  assertEquals(array1.length, array2.length);
+  for (var i = 0; i < array1.length; i++) {
+    assertEquals(array1[i], array2[i]);
+  }
+}
+
+function assertUndefined() {
+  _validateArguments(1, arguments);
+  var commentArg = _commentArg(1, arguments);
+  var val = _nonCommentArg(1, 1, arguments);
+  chai.assert.isUndefined(val, commentArg);
+}
+
+function assertNotUndefined() {
+  _validateArguments(1, arguments);
+  var commentArg = _commentArg(1, arguments);
+  var val = _nonCommentArg(1, 1, arguments);
+  chai.assert.isNotUndefined(val, commentArg);
+}
diff --git a/tests/mocha/utils_test.js b/tests/mocha/utils_test.js
new file mode 100644
index 000000000..fb651ae3f
--- /dev/null
+++ b/tests/mocha/utils_test.js
@@ -0,0 +1,91 @@
+
+// Declare some globals to make eslint happier.
+// TODO: make an eslint config that applies to this directory and put this
+// configuration in that file, instead of inline.
+/* global suite, test, chai, assertFalse, assertTrue, assertEquals */
+
+suite('Utils', function() {
+  test('genUid', function() {
+    var uuids = {};
+    chai.assert.equal([1,2,3].indexOf(4), -1);
+    for (var i = 0; i < 1000; i++) {
+      var uuid = Blockly.utils.genUid();
+      chai.assert.isFalse(uuid in uuids, 'UUID different: ' + uuid);
+      uuids[uuid] = true;
+    }
+  });
+  test('addClass', function() {
+    var p = document.createElement('p');
+    Blockly.utils.addClass(p, 'one');
+    assertEquals('Adding "one"', 'one', p.className);
+    Blockly.utils.addClass(p, 'one');
+    assertEquals('Adding duplicate "one"', 'one', p.className);
+    Blockly.utils.addClass(p, 'two');
+    assertEquals('Adding "two"', 'one two', p.className);
+    Blockly.utils.addClass(p, 'two');
+    assertEquals('Adding duplicate "two"', 'one two', p.className);
+    Blockly.utils.addClass(p, 'three');
+    assertEquals('Adding "three"', 'one two three', p.className);
+  });
+
+  test('hasClass', function() {
+    var p = document.createElement('p');
+    p.className = ' one three  two three  ';
+    assertTrue('Has "one"', Blockly.utils.hasClass(p, 'one'));
+    assertTrue('Has "two"', Blockly.utils.hasClass(p, 'two'));
+    assertTrue('Has "three"', Blockly.utils.hasClass(p, 'three'));
+    assertFalse('Has no "four"', Blockly.utils.hasClass(p, 'four'));
+    assertFalse('Has no "t"', Blockly.utils.hasClass(p, 't'));
+  });
+
+  test('removeClass', function() {
+    var p = document.createElement('p');
+    p.className = ' one three  two three  ';
+    Blockly.utils.removeClass(p, 'two');
+    assertEquals('Removing "two"', 'one three three', p.className);
+    Blockly.utils.removeClass(p, 'four');
+    assertEquals('Removing "four"', 'one three three', p.className);
+    Blockly.utils.removeClass(p, 'three');
+    assertEquals('Removing "three"', 'one', p.className);
+    Blockly.utils.removeClass(p, 'ne');
+    assertEquals('Removing "ne"', 'one', p.className);
+    Blockly.utils.removeClass(p, 'one');
+    assertEquals('Removing "one"', '', p.className);
+    Blockly.utils.removeClass(p, 'zero');
+    assertEquals('Removing "zero"', '', p.className);
+  });
+
+  test('shortest string length', function() {
+    var len = Blockly.utils.shortestStringLength('one,two,three,four,five'.split(','));
+    assertEquals('Length of "one"', 3, len);
+    len = Blockly.utils.shortestStringLength('one,two,three,four,five,'.split(','));
+    assertEquals('Length of ""', 0, len);
+    len = Blockly.utils.shortestStringLength(['Hello World']);
+    assertEquals('List of one', 11, len);
+    len = Blockly.utils.shortestStringLength([]);
+    assertEquals('Empty list', 0, len);
+  });
+
+  test('comment word prefix', function() {
+    var len = Blockly.utils.commonWordPrefix('one,two,three,four,five'.split(','));
+    assertEquals('No prefix', 0, len);
+    len = Blockly.utils.commonWordPrefix('Xone,Xtwo,Xthree,Xfour,Xfive'.split(','));
+    assertEquals('No word prefix', 0, len);
+    len = Blockly.utils.commonWordPrefix('abc de,abc de,abc de,abc de'.split(','));
+    assertEquals('Full equality', 6, len);
+    len = Blockly.utils.commonWordPrefix('abc deX,abc deY'.split(','));
+    assertEquals('One word prefix', 4, len);
+    len = Blockly.utils.commonWordPrefix('abc de,abc deY'.split(','));
+    assertEquals('Overflow no', 4, len);
+    len = Blockly.utils.commonWordPrefix('abc de,abc de Y'.split(','));
+    assertEquals('Overflow yes', 6, len);
+    len = Blockly.utils.commonWordPrefix(['Hello World']);
+    assertEquals('List of one', 11, len);
+    len = Blockly.utils.commonWordPrefix([]);
+    assertEquals('Empty list', 0, len);
+    len = Blockly.utils.commonWordPrefix('turn&nbsp;left,turn&nbsp;right'.split(','));
+    assertEquals('No prefix due to &amp;nbsp;', 0, len);
+    len = Blockly.utils.commonWordPrefix('turn\u00A0left,turn\u00A0right'.split(','));
+    assertEquals('No prefix due to \\u00A0', 0, len);
+  });
+});