diff --git a/blockly_compressed.js b/blockly_compressed.js
index c6f57cb1a..73a91e511 100644
--- a/blockly_compressed.js
+++ b/blockly_compressed.js
@@ -952,25 +952,25 @@ Blockly.Scrollbar.prototype.onMouseMoveKnob_=function(a){this.svgKnob_.setAttrib
 Blockly.Scrollbar.prototype.onMouseUpKnob_=function(){Blockly.removeAllRanges();Blockly.hideChaff(!0);Blockly.Scrollbar.onMouseUpWrapper_&&(Blockly.unbindEvent_(Blockly.Scrollbar.onMouseUpWrapper_),Blockly.Scrollbar.onMouseUpWrapper_=null);Blockly.Scrollbar.onMouseMoveWrapper_&&(Blockly.unbindEvent_(Blockly.Scrollbar.onMouseMoveWrapper_),Blockly.Scrollbar.onMouseMoveWrapper_=null)};
 Blockly.Scrollbar.prototype.constrainKnob_=function(a){if(0>=a||isNaN(a))a=0;else{var b=this.horizontal_?"width":"height",c=parseFloat(this.svgBackground_.getAttribute(b)),b=parseFloat(this.svgKnob_.getAttribute(b));a=Math.min(a,c-b)}return a};
 Blockly.Scrollbar.prototype.onScroll_=function(){var a=parseFloat(this.svgKnob_.getAttribute(this.horizontal_?"x":"y")),b=parseFloat(this.svgBackground_.getAttribute(this.horizontal_?"width":"height")),a=a/b;isNaN(a)&&(a=0);b={};this.horizontal_?b.x=a:b.y=a;this.workspace_.setMetrics(b)};Blockly.Scrollbar.prototype.set=function(a){this.svgKnob_.setAttribute(this.horizontal_?"x":"y",a*this.ratio_);this.onScroll_()};
-Blockly.Scrollbar.insertAfter_=function(a,b){var c=b.nextSibling,d=b.parentNode;if(!d)throw"Reference node has no parent.";c?d.insertBefore(a,c):d.appendChild(a)};Blockly.Trashcan=function(a){this.workspace_=a};Blockly.Trashcan.prototype.WIDTH_=47;Blockly.Trashcan.prototype.BODY_HEIGHT_=45;Blockly.Trashcan.prototype.LID_HEIGHT_=15;Blockly.Trashcan.prototype.MARGIN_BOTTOM_=35;Blockly.Trashcan.prototype.MARGIN_SIDE_=35;Blockly.Trashcan.prototype.MARGIN_HOTSPOT_=25;Blockly.Trashcan.prototype.isOpen=!1;Blockly.Trashcan.prototype.svgGroup_=null;Blockly.Trashcan.prototype.svgLid_=null;Blockly.Trashcan.prototype.lidTask_=0;Blockly.Trashcan.prototype.lidOpen_=0;
+Blockly.Scrollbar.insertAfter_=function(a,b){var c=b.nextSibling,d=b.parentNode;if(!d)throw"Reference node has no parent.";c?d.insertBefore(a,c):d.appendChild(a)};Blockly.Trashcan=function(a){this.workspace_=a};Blockly.Trashcan.prototype.WIDTH_=47;Blockly.Trashcan.prototype.BODY_HEIGHT_=45;Blockly.Trashcan.prototype.LID_HEIGHT_=15;Blockly.Trashcan.prototype.MARGIN_BOTTOM_=20;Blockly.Trashcan.prototype.MARGIN_SIDE_=20;Blockly.Trashcan.prototype.MARGIN_HOTSPOT_=25;Blockly.Trashcan.prototype.isOpen=!1;Blockly.Trashcan.prototype.svgGroup_=null;Blockly.Trashcan.prototype.svgLid_=null;Blockly.Trashcan.prototype.lidTask_=0;Blockly.Trashcan.prototype.lidOpen_=0;
 Blockly.Trashcan.prototype.left_=0;Blockly.Trashcan.prototype.top_=0;
 Blockly.Trashcan.prototype.createDom=function(){this.svgGroup_=Blockly.createSvgElement("g",{"class":"blocklyTrash"},null);var a=String(Math.random()).substring(2),b=Blockly.createSvgElement("clipPath",{id:"blocklyTrashBodyClipPath"+a},this.svgGroup_);Blockly.createSvgElement("rect",{width:this.WIDTH_,height:this.BODY_HEIGHT_,y:this.LID_HEIGHT_},b);Blockly.createSvgElement("image",{width:Blockly.SPRITE.width,height:Blockly.SPRITE.height,y:-32,"clip-path":"url(#blocklyTrashBodyClipPath"+a+")"},this.svgGroup_).setAttributeNS("http://www.w3.org/1999/xlink",
 "xlink:href",this.workspace_.options.pathToMedia+Blockly.SPRITE.url);b=Blockly.createSvgElement("clipPath",{id:"blocklyTrashLidClipPath"+a},this.svgGroup_);Blockly.createSvgElement("rect",{width:this.WIDTH_,height:this.LID_HEIGHT_},b);this.svgLid_=Blockly.createSvgElement("image",{width:Blockly.SPRITE.width,height:Blockly.SPRITE.height,y:-32,"clip-path":"url(#blocklyTrashLidClipPath"+a+")"},this.svgGroup_);this.svgLid_.setAttributeNS("http://www.w3.org/1999/xlink","xlink:href",this.workspace_.options.pathToMedia+
-Blockly.SPRITE.url);this.animateLid_();return this.svgGroup_};Blockly.Trashcan.prototype.init=function(){this.setOpen_(!1)};Blockly.Trashcan.prototype.dispose=function(){this.svgGroup_&&(goog.dom.removeNode(this.svgGroup_),this.svgGroup_=null);this.workspace_=this.svgLid_=null;goog.Timer.clear(this.lidTask_)};
-Blockly.Trashcan.prototype.position=function(){var a=this.workspace_.getMetrics();a&&(this.left_=this.workspace_.RTL?this.MARGIN_SIDE_:a.viewWidth+a.absoluteLeft-this.WIDTH_-this.MARGIN_SIDE_,this.top_=a.viewHeight+a.absoluteTop-(this.BODY_HEIGHT_+this.LID_HEIGHT_)-this.MARGIN_BOTTOM_,this.svgGroup_.setAttribute("transform","translate("+this.left_+","+this.top_+")"))};
+Blockly.SPRITE.url);this.animateLid_();return this.svgGroup_};Blockly.Trashcan.prototype.init=function(a){this.bottom_=this.MARGIN_BOTTOM_+a;this.setOpen_(!1);return this.bottom_+this.BODY_HEIGHT_+this.LID_HEIGHT_};Blockly.Trashcan.prototype.dispose=function(){this.svgGroup_&&(goog.dom.removeNode(this.svgGroup_),this.svgGroup_=null);this.workspace_=this.svgLid_=null;goog.Timer.clear(this.lidTask_)};
+Blockly.Trashcan.prototype.position=function(){var a=this.workspace_.getMetrics();a&&(this.left_=this.workspace_.RTL?this.MARGIN_SIDE_+Blockly.Scrollbar.scrollbarThickness:a.viewWidth+a.absoluteLeft-this.WIDTH_-this.MARGIN_SIDE_-Blockly.Scrollbar.scrollbarThickness,this.top_=a.viewHeight+a.absoluteTop-(this.BODY_HEIGHT_+this.LID_HEIGHT_)-this.bottom_,this.svgGroup_.setAttribute("transform","translate("+this.left_+","+this.top_+")"))};
 Blockly.Trashcan.prototype.getRect=function(){var a=Blockly.getSvgXY_(this.svgGroup_,this.workspace_);return new goog.math.Rect(a.x-this.MARGIN_HOTSPOT_,a.y-this.MARGIN_HOTSPOT_,this.WIDTH_+2*this.MARGIN_HOTSPOT_,this.BODY_HEIGHT_+this.LID_HEIGHT_+2*this.MARGIN_HOTSPOT_)};Blockly.Trashcan.prototype.setOpen_=function(a){this.isOpen!=a&&(goog.Timer.clear(this.lidTask_),this.isOpen=a,this.animateLid_())};
 Blockly.Trashcan.prototype.animateLid_=function(){this.lidOpen_+=this.isOpen?.2:-.2;this.lidOpen_=goog.math.clamp(this.lidOpen_,0,1);var a=45*this.lidOpen_;this.svgLid_.setAttribute("transform","rotate("+(this.workspace_.RTL?-a:a)+","+(this.workspace_.RTL?4:this.WIDTH_-4)+","+(this.LID_HEIGHT_-2)+")");a=goog.math.lerp(.4,.8,this.lidOpen_);this.svgGroup_.style.opacity=a;0<this.lidOpen_&&1>this.lidOpen_&&(this.lidTask_=goog.Timer.callOnce(this.animateLid_,20,this))};
 Blockly.Trashcan.prototype.close=function(){this.setOpen_(!1)};
 // Copyright 2015 Google Inc.  Apache License 2.0
-Blockly.ZoomControls=function(a){this.workspace_=a};Blockly.ZoomControls.prototype.WIDTH_=32;Blockly.ZoomControls.prototype.HEIGHT_=110;Blockly.ZoomControls.prototype.MARGIN_BOTTOM_=100;Blockly.ZoomControls.prototype.MARGIN_SIDE_=35;Blockly.ZoomControls.prototype.svgGroup_=null;Blockly.ZoomControls.prototype.left_=0;Blockly.ZoomControls.prototype.top_=0;
+Blockly.ZoomControls=function(a){this.workspace_=a};Blockly.ZoomControls.prototype.WIDTH_=32;Blockly.ZoomControls.prototype.HEIGHT_=110;Blockly.ZoomControls.prototype.MARGIN_BOTTOM_=20;Blockly.ZoomControls.prototype.MARGIN_SIDE_=20;Blockly.ZoomControls.prototype.svgGroup_=null;Blockly.ZoomControls.prototype.left_=0;Blockly.ZoomControls.prototype.top_=0;
 Blockly.ZoomControls.prototype.createDom=function(){var a=this.workspace_;this.svgGroup_=Blockly.createSvgElement("g",{"class":"blocklyZoom"},null);var b=String(Math.random()).substring(2),c=Blockly.createSvgElement("clipPath",{id:"blocklyZoomoutClipPath"+b},this.svgGroup_);Blockly.createSvgElement("rect",{width:32,height:32,y:77},c);var d=Blockly.createSvgElement("image",{width:Blockly.SPRITE.width,height:Blockly.SPRITE.height,x:-64,y:-15,"clip-path":"url(#blocklyZoomoutClipPath"+b+")"},this.svgGroup_);
 d.setAttributeNS("http://www.w3.org/1999/xlink","xlink:href",a.options.pathToMedia+Blockly.SPRITE.url);c=Blockly.createSvgElement("clipPath",{id:"blocklyZoominClipPath"+b},this.svgGroup_);Blockly.createSvgElement("rect",{width:32,height:32,y:43},c);var e=Blockly.createSvgElement("image",{width:Blockly.SPRITE.width,height:Blockly.SPRITE.height,x:-32,y:-49,"clip-path":"url(#blocklyZoominClipPath"+b+")"},this.svgGroup_);e.setAttributeNS("http://www.w3.org/1999/xlink","xlink:href",a.options.pathToMedia+
 Blockly.SPRITE.url);c=Blockly.createSvgElement("clipPath",{id:"blocklyZoomresetClipPath"+b},this.svgGroup_);Blockly.createSvgElement("rect",{width:32,height:32},c);b=Blockly.createSvgElement("image",{width:Blockly.SPRITE.width,height:Blockly.SPRITE.height,y:-92,"clip-path":"url(#blocklyZoomresetClipPath"+b+")"},this.svgGroup_);b.setAttributeNS("http://www.w3.org/1999/xlink","xlink:href",a.options.pathToMedia+Blockly.SPRITE.url);Blockly.bindEvent_(b,"mousedown",a,a.zoomReset);Blockly.bindEvent_(e,
-"mousedown",null,function(){a.zoomCenter(1)});Blockly.bindEvent_(d,"mousedown",null,function(){a.zoomCenter(-1)});return this.svgGroup_};Blockly.ZoomControls.prototype.init=function(){};Blockly.ZoomControls.prototype.dispose=function(){this.svgGroup_&&(goog.dom.removeNode(this.svgGroup_),this.svgGroup_=null);this.workspace_=null};
-Blockly.ZoomControls.prototype.position=function(){var a=this.workspace_.getMetrics();a&&(this.left_=this.workspace_.RTL?this.MARGIN_SIDE_:a.viewWidth+a.absoluteLeft-this.WIDTH_-this.MARGIN_SIDE_,this.top_=a.viewHeight+a.absoluteTop-this.HEIGHT_-this.MARGIN_BOTTOM_,this.svgGroup_.setAttribute("transform","translate("+this.left_+","+this.top_+")"))};Blockly.Xml={};Blockly.Xml.workspaceToDom=function(a){var b;a.RTL&&(b=a.getWidth());for(var c=goog.dom.createDom("xml"),d=a.getTopBlocks(!0),e=0,f;f=d[e];e++){var g=Blockly.Xml.blockToDom_(f);f=f.getRelativeToSurfaceXY();g.setAttribute("x",Math.round(a.RTL?b-f.x:f.x));g.setAttribute("y",Math.round(f.y));c.appendChild(g)}return c};
-Blockly.Xml.blockToDom_=function(a){var b=goog.dom.createDom("block");b.setAttribute("type",a.type);b.setAttribute("id",a.id);if(a.mutationToDom){var c=a.mutationToDom();c&&(c.hasChildNodes()||c.hasAttributes())&&b.appendChild(c)}for(var c=0,d;d=a.inputList[c];c++)for(var e=0,f;f=d.fieldRow[e];e++)if(f.name&&f.EDITABLE){var g=goog.dom.createDom("field",null,f.getValue());g.setAttribute("name",f.name);b.appendChild(g)}if(c=a.getCommentText())c=goog.dom.createDom("comment",null,c),"object"==typeof a.comment&&
-(c.setAttribute("pinned",a.comment.isVisible()),d=a.comment.getBubbleSize(),c.setAttribute("h",d.height),c.setAttribute("w",d.width)),b.appendChild(c);a.data&&(c=goog.dom.createDom("data",null,a.data),b.appendChild(c));for(c=0;d=a.inputList[c];c++){var h,e=!0;d.type!=Blockly.DUMMY_INPUT&&(f=d.connection.targetBlock(),d.type==Blockly.INPUT_VALUE?h=goog.dom.createDom("value"):d.type==Blockly.NEXT_STATEMENT&&(h=goog.dom.createDom("statement")),f&&(h.appendChild(Blockly.Xml.blockToDom_(f)),e=!1),h.setAttribute("name",
-d.name),e||b.appendChild(h))}a.inputsInlineDefault!=a.inputsInline&&b.setAttribute("inline",a.inputsInline);a.isCollapsed()&&b.setAttribute("collapsed",!0);a.disabled&&b.setAttribute("disabled",!0);a.isDeletable()||b.setAttribute("deletable",!1);a.isMovable()||b.setAttribute("movable",!1);a.isEditable()||b.setAttribute("editable",!1);if(a=a.getNextBlock())h=goog.dom.createDom("next",null,Blockly.Xml.blockToDom_(a)),b.appendChild(h);return b};Blockly.Xml.domToText=function(a){return(new XMLSerializer).serializeToString(a)};
+"mousedown",null,function(){a.zoomCenter(1)});Blockly.bindEvent_(d,"mousedown",null,function(){a.zoomCenter(-1)});return this.svgGroup_};Blockly.ZoomControls.prototype.init=function(a){this.bottom_=this.MARGIN_BOTTOM_+a;return this.bottom_+this.HEIGHT_};Blockly.ZoomControls.prototype.dispose=function(){this.svgGroup_&&(goog.dom.removeNode(this.svgGroup_),this.svgGroup_=null);this.workspace_=null};
+Blockly.ZoomControls.prototype.position=function(){var a=this.workspace_.getMetrics();a&&(this.left_=this.workspace_.RTL?this.MARGIN_SIDE_+Blockly.Scrollbar.scrollbarThickness:a.viewWidth+a.absoluteLeft-this.WIDTH_-this.MARGIN_SIDE_-Blockly.Scrollbar.scrollbarThickness,this.top_=a.viewHeight+a.absoluteTop-this.HEIGHT_-this.bottom_,this.svgGroup_.setAttribute("transform","translate("+this.left_+","+this.top_+")"))};Blockly.Xml={};Blockly.Xml.workspaceToDom=function(a){var b;a.RTL&&(b=a.getWidth());for(var c=goog.dom.createDom("xml"),d=a.getTopBlocks(!0),e=0,f;f=d[e];e++){var g=Blockly.Xml.blockToDom_(f);f=f.getRelativeToSurfaceXY();g.setAttribute("x",Math.round(a.RTL?b-f.x:f.x));g.setAttribute("y",Math.round(f.y));c.appendChild(g)}return c};
+Blockly.Xml.blockToDom_=function(a){var b=goog.dom.createDom("block");b.setAttribute("type",a.type);Blockly.Realtime.isEnabled()&&b.setAttribute("id",a.id);if(a.mutationToDom){var c=a.mutationToDom();c&&(c.hasChildNodes()||c.hasAttributes())&&b.appendChild(c)}for(var c=0,d;d=a.inputList[c];c++)for(var e=0,f;f=d.fieldRow[e];e++)if(f.name&&f.EDITABLE){var g=goog.dom.createDom("field",null,f.getValue());g.setAttribute("name",f.name);b.appendChild(g)}if(c=a.getCommentText())c=goog.dom.createDom("comment",
+null,c),"object"==typeof a.comment&&(c.setAttribute("pinned",a.comment.isVisible()),d=a.comment.getBubbleSize(),c.setAttribute("h",d.height),c.setAttribute("w",d.width)),b.appendChild(c);a.data&&(c=goog.dom.createDom("data",null,a.data),b.appendChild(c));for(c=0;d=a.inputList[c];c++){var h,e=!0;d.type!=Blockly.DUMMY_INPUT&&(f=d.connection.targetBlock(),d.type==Blockly.INPUT_VALUE?h=goog.dom.createDom("value"):d.type==Blockly.NEXT_STATEMENT&&(h=goog.dom.createDom("statement")),f&&(h.appendChild(Blockly.Xml.blockToDom_(f)),
+e=!1),h.setAttribute("name",d.name),e||b.appendChild(h))}a.inputsInlineDefault!=a.inputsInline&&b.setAttribute("inline",a.inputsInline);a.isCollapsed()&&b.setAttribute("collapsed",!0);a.disabled&&b.setAttribute("disabled",!0);a.isDeletable()||b.setAttribute("deletable",!1);a.isMovable()||b.setAttribute("movable",!1);a.isEditable()||b.setAttribute("editable",!1);if(a=a.getNextBlock())h=goog.dom.createDom("next",null,Blockly.Xml.blockToDom_(a)),b.appendChild(h);return b};Blockly.Xml.domToText=function(a){return(new XMLSerializer).serializeToString(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=(new DOMParser).parseFromString(a,"text/xml");if(!a||!a.firstChild||"xml"!=a.firstChild.nodeName.toLowerCase()||a.firstChild!==a.lastChild)throw"Blockly.Xml.textToDom did not obtain a valid XML tree.";return a.firstChild};
 Blockly.Xml.domToWorkspace=function(a,b){var c;a.RTL&&(c=a.getWidth());for(var d=b.childNodes.length,e=0;e<d;e++){var f=b.childNodes[e];if("block"==f.nodeName.toLowerCase()){var g=Blockly.Xml.domToBlock(a,f),h=parseInt(f.getAttribute("x"),10),f=parseInt(f.getAttribute("y"),10);isNaN(h)||isNaN(f)||g.moveBy(a.RTL?c-h:h,f)}}};
@@ -979,17 +979,17 @@ Blockly.Xml.domToBlockHeadless_=function(a,b,c){var d=null,e=b.getAttribute("typ
 (g=l);k=h.getAttribute("name");switch(h.nodeName.toLowerCase()){case "mutation":d.domToMutation&&(d.domToMutation(h),d.initSvg&&d.initSvg());break;case "comment":d.setCommentText(h.textContent);var q=h.getAttribute("pinned");q&&setTimeout(function(){d.comment&&d.comment.setVisible&&d.comment.setVisible("true"==q)},1);g=parseInt(h.getAttribute("w"),10);h=parseInt(h.getAttribute("h"),10);!isNaN(g)&&!isNaN(h)&&d.comment&&d.comment.setVisible&&d.comment.setBubbleSize(g,h);break;case "data":d.data=h.textContent;
 break;case "title":case "field":d.setFieldValue(h.textContent,k);break;case "value":case "statement":h=d.getInput(k);if(!h)throw"Input "+k+" does not exist in block "+e;if(g&&"block"==g.nodeName.toLowerCase())if(g=Blockly.Xml.domToBlockHeadless_(a,g,c),g.outputConnection)h.connection.connect(g.outputConnection);else if(g.previousConnection)h.connection.connect(g.previousConnection);else throw"Child block does not have output or previous statement.";break;case "next":if(g&&"block"==g.nodeName.toLowerCase()){if(!d.nextConnection)throw"Next statement does not exist.";
 if(d.nextConnection.targetConnection)throw"Next statement is already connected.";g=Blockly.Xml.domToBlockHeadless_(a,g,c);if(!g.previousConnection)throw"Next block does not have previous statement.";d.nextConnection.connect(g.previousConnection)}break;default:console.log("Ignoring unknown tag: "+h.nodeName)}}(a=b.getAttribute("inline"))&&d.setInputsInline("true"==a);(a=b.getAttribute("disabled"))&&d.setDisabled("true"==a);(a=b.getAttribute("deletable"))&&d.setDeletable("true"==a);(a=b.getAttribute("movable"))&&
-d.setMovable("true"==a);(a=b.getAttribute("editable"))&&d.setEditable("true"==a);(b=b.getAttribute("collapsed"))&&d.setCollapsed("true"==b);d.validate&&d.validate.call(d);return d};Blockly.Xml.deleteNext=function(a){for(var b=0,c;c=a.childNodes[b];b++)if("next"==c.nodeName.toLowerCase()){a.removeChild(c);break}};goog.global.Blockly||(goog.global.Blockly={});goog.global.Blockly.Xml||(goog.global.Blockly.Xml={});goog.global.Blockly.Xml.domToText=Blockly.Xml.domToText;
+d.setMovable("true"==a);(a=b.getAttribute("editable"))&&d.setEditable("true"==a);(b=b.getAttribute("collapsed"))&&d.setCollapsed("true"==b);d.validate&&d.validate();return d};Blockly.Xml.deleteNext=function(a){for(var b=0,c;c=a.childNodes[b];b++)if("next"==c.nodeName.toLowerCase()){a.removeChild(c);break}};goog.global.Blockly||(goog.global.Blockly={});goog.global.Blockly.Xml||(goog.global.Blockly.Xml={});goog.global.Blockly.Xml.domToText=Blockly.Xml.domToText;
 goog.global.Blockly.Xml.domToWorkspace=Blockly.Xml.domToWorkspace;goog.global.Blockly.Xml.textToDom=Blockly.Xml.textToDom;goog.global.Blockly.Xml.workspaceToDom=Blockly.Xml.workspaceToDom;
 // Copyright 2014 Google Inc.  Apache License 2.0
 Blockly.WorkspaceSvg=function(a){Blockly.WorkspaceSvg.superClass_.constructor.call(this,a);this.getMetrics=a.getMetrics;this.setMetrics=a.setMetrics;Blockly.ConnectionDB.init(this);this.SOUNDS_=Object.create(null);this.eventWrappers_=[]};goog.inherits(Blockly.WorkspaceSvg,Blockly.Workspace);Blockly.WorkspaceSvg.prototype.rendered=!0;Blockly.WorkspaceSvg.prototype.isFlyout=!1;Blockly.WorkspaceSvg.prototype.isScrolling=!1;Blockly.WorkspaceSvg.prototype.scrollX=0;
 Blockly.WorkspaceSvg.prototype.scrollY=0;Blockly.WorkspaceSvg.prototype.dragDeltaX_=0;Blockly.WorkspaceSvg.prototype.dragDeltaY_=0;Blockly.WorkspaceSvg.prototype.scale=1;Blockly.WorkspaceSvg.prototype.trashcan=null;Blockly.WorkspaceSvg.prototype.scrollbar=null;
 Blockly.WorkspaceSvg.prototype.createDom=function(a){this.svgGroup_=Blockly.createSvgElement("g",{"class":"blocklyWorkspace"},null);a&&(this.svgBackground_=Blockly.createSvgElement("rect",{height:"100%",width:"100%","class":a},this.svgGroup_),"blocklyMainBackground"==a&&(this.svgBackground_.style.fill="url(#"+this.options.gridPattern.id+")"));this.svgBlockCanvas_=Blockly.createSvgElement("g",{"class":"blocklyBlockCanvas"},this.svgGroup_,this);this.svgBubbleCanvas_=Blockly.createSvgElement("g",{"class":"blocklyBubbleCanvas"},
-this.svgGroup_,this);this.options.hasTrashcan&&this.addTrashcan_();this.options.zoomOptions&&this.options.zoomOptions.controls&&this.addZoomControls_();Blockly.bindEvent_(this.svgGroup_,"mousedown",this,this.onMouseDown_);var b=this;Blockly.bindEvent_(this.svgGroup_,"touchstart",null,function(a){Blockly.longStart_(a,b)});this.options.zoomOptions&&this.options.zoomOptions.wheel&&Blockly.bindEvent_(this.svgGroup_,"wheel",this,this.onMouseWheel_);this.options.hasCategories?this.toolbox_=new Blockly.Toolbox(this):
-this.options.languageTree&&this.addFlyout_();this.updateGridPattern_();return this.svgGroup_};
+this.svgGroup_,this);a=Blockly.Scrollbar.scrollbarThickness;this.options.hasTrashcan&&(a=this.addTrashcan_(a));this.options.zoomOptions&&this.options.zoomOptions.controls&&(a=this.addZoomControls_(a));Blockly.bindEvent_(this.svgGroup_,"mousedown",this,this.onMouseDown_);var b=this;Blockly.bindEvent_(this.svgGroup_,"touchstart",null,function(a){Blockly.longStart_(a,b)});this.options.zoomOptions&&this.options.zoomOptions.wheel&&Blockly.bindEvent_(this.svgGroup_,"wheel",this,this.onMouseWheel_);this.options.hasCategories?
+this.toolbox_=new Blockly.Toolbox(this):this.options.languageTree&&this.addFlyout_();this.updateGridPattern_();return this.svgGroup_};
 Blockly.WorkspaceSvg.prototype.dispose=function(){this.rendered=!1;Blockly.unbindEvent_(this.eventWrappers_);Blockly.WorkspaceSvg.superClass_.dispose.call(this);this.svgGroup_&&(goog.dom.removeNode(this.svgGroup_),this.svgGroup_=null);this.svgBubbleCanvas_=this.svgBlockCanvas_=null;this.toolbox_&&(this.toolbox_.dispose(),this.toolbox_=null);this.flyout_&&(this.flyout_.dispose(),this.flyout_=null);this.trashcan&&(this.trashcan.dispose(),this.trashcan=null);this.scrollbar&&(this.scrollbar.dispose(),
-this.scrollbar=null);this.zoomControls_&&(this.zoomControls_.dispose(),this.zoomControls_=null);this.options.parentWorkspace||goog.dom.removeNode(this.options.svg)};Blockly.WorkspaceSvg.prototype.addTrashcan_=function(){this.trashcan=new Blockly.Trashcan(this);var a=this.trashcan.createDom();this.svgGroup_.insertBefore(a,this.svgBlockCanvas_);this.trashcan.init()};
-Blockly.WorkspaceSvg.prototype.addZoomControls_=function(){this.zoomControls_=new Blockly.ZoomControls(this);var a=this.zoomControls_.createDom();this.svgGroup_.appendChild(a);this.zoomControls_.init()};Blockly.WorkspaceSvg.prototype.addFlyout_=function(){this.flyout_=new Blockly.Flyout({parentWorkspace:this,RTL:this.RTL});this.flyout_.autoClose=!1;var a=this.flyout_.createDom();this.svgGroup_.insertBefore(a,this.svgBlockCanvas_)};
+this.scrollbar=null);this.zoomControls_&&(this.zoomControls_.dispose(),this.zoomControls_=null);this.options.parentWorkspace||goog.dom.removeNode(this.options.svg)};Blockly.WorkspaceSvg.prototype.addTrashcan_=function(a){this.trashcan=new Blockly.Trashcan(this);var b=this.trashcan.createDom();this.svgGroup_.insertBefore(b,this.svgBlockCanvas_);return this.trashcan.init(a)};
+Blockly.WorkspaceSvg.prototype.addZoomControls_=function(a){this.zoomControls_=new Blockly.ZoomControls(this);var b=this.zoomControls_.createDom();this.svgGroup_.appendChild(b);return this.zoomControls_.init(a)};Blockly.WorkspaceSvg.prototype.addFlyout_=function(){this.flyout_=new Blockly.Flyout({parentWorkspace:this,RTL:this.RTL});this.flyout_.autoClose=!1;var a=this.flyout_.createDom();this.svgGroup_.insertBefore(a,this.svgBlockCanvas_)};
 Blockly.WorkspaceSvg.prototype.resize=function(){this.toolbox_&&this.toolbox_.position();this.flyout_&&this.flyout_.position();this.trashcan&&this.trashcan.position();this.zoomControls_&&this.zoomControls_.position();this.scrollbar&&this.scrollbar.resize()};Blockly.WorkspaceSvg.prototype.getCanvas=function(){return this.svgBlockCanvas_};Blockly.WorkspaceSvg.prototype.getBubbleCanvas=function(){return this.svgBubbleCanvas_};
 Blockly.WorkspaceSvg.prototype.translate=function(a,b){var c="translate("+a+","+b+")scale("+this.scale+")";this.svgBlockCanvas_.setAttribute("transform",c);this.svgBubbleCanvas_.setAttribute("transform",c)};Blockly.WorkspaceSvg.prototype.addTopBlock=function(a){Blockly.WorkspaceSvg.superClass_.addTopBlock.call(this,a);Blockly.Realtime.isEnabled()&&!this.options.parentWorkspace&&Blockly.Realtime.addTopBlock(a)};
 Blockly.WorkspaceSvg.prototype.removeTopBlock=function(a){Blockly.WorkspaceSvg.superClass_.removeTopBlock.call(this,a);Blockly.Realtime.isEnabled()&&!this.options.parentWorkspace&&Blockly.Realtime.removeTopBlock(a)};Blockly.WorkspaceSvg.prototype.getWidth=function(){return this.getMetrics().viewWidth};
@@ -1002,7 +1002,7 @@ Blockly.WorkspaceSvg.prototype.isDeleteArea=function(a){a=Blockly.mouseToSvg(a,B
 Blockly.WorkspaceSvg.prototype.onMouseDown_=function(a){this.markFocused();Blockly.isTargetInput_(a)||(Blockly.svgResize(this),Blockly.terminateDrag_(),Blockly.hideChaff(),a.target&&a.target.nodeName&&("svg"==a.target.nodeName.toLowerCase()||a.target==this.svgBackground_)&&Blockly.selected&&!this.options.readOnly&&Blockly.selected.unselect(),Blockly.isRightButton(a)?this.showContextMenu_(a):this.scrollbar&&(Blockly.removeAllRanges(),this.isScrolling=!0,this.startDragMouseX=a.clientX,this.startDragMouseY=
 a.clientY,this.startDragMetrics=this.getMetrics(),this.startScrollX=this.scrollX,this.startScrollY=this.scrollY,"mouseup"in Blockly.bindEvent_.TOUCH_MAP&&(Blockly.onTouchUpWrapper_=Blockly.bindEvent_(document,"mouseup",null,Blockly.onMouseUp_)),Blockly.onMouseMoveWrapper_=Blockly.bindEvent_(document,"mousemove",null,Blockly.onMouseMove_)),a.stopPropagation())};
 Blockly.WorkspaceSvg.prototype.startDrag=function(a,b,c){a=Blockly.mouseToSvg(a,this.options.svg);a.x/=this.scale;a.y/=this.scale;this.dragDeltaX_=b-a.x;this.dragDeltaY_=c-a.y};Blockly.WorkspaceSvg.prototype.moveDrag=function(a){a=Blockly.mouseToSvg(a,this.options.svg);a.x/=this.scale;a.y/=this.scale;return new goog.math.Coordinate(this.dragDeltaX_+a.x,this.dragDeltaY_+a.y)};
-Blockly.WorkspaceSvg.prototype.onMouseWheel_=function(a){Blockly.hideChaff(!0);Blockly.terminateDrag_();var b=0<a.deltaY?-1:1,c=Blockly.mouseToSvg(a,this.options.svg);this.zoom(c.x,c.y,b);a.preventDefault()};
+Blockly.WorkspaceSvg.prototype.onMouseWheel_=function(a){Blockly.terminateDrag_();var b=0<a.deltaY?-1:1,c=Blockly.mouseToSvg(a,this.options.svg);this.zoom(c.x,c.y,b);a.preventDefault()};
 Blockly.WorkspaceSvg.prototype.showContextMenu_=function(a){if(!this.options.readOnly){var b=[];if(this.options.collapse){for(var c=!1,d=!1,e=this.getTopBlocks(!0),f=0;f<e.length;f++)for(var g=e[f];g;)g.isCollapsed()?c=!0:d=!0,g=g.getNextBlock();d={enabled:d};d.text=Blockly.Msg.COLLAPSE_ALL;d.callback=function(){for(var a=0,b=0;b<e.length;b++)for(var c=e[b];c;)setTimeout(c.setCollapsed.bind(c,!0),a),c=c.getNextBlock(),a+=10};b.push(d);c={enabled:c};c.text=Blockly.Msg.EXPAND_ALL;c.callback=function(){for(var a=
 0,b=0;b<e.length;b++)for(var c=e[b];c;)setTimeout(c.setCollapsed.bind(c,!1),a),c=c.getNextBlock(),a+=10};b.push(c)}Blockly.ContextMenu.show(a,b,this.RTL)}};Blockly.WorkspaceSvg.prototype.loadAudio_=function(a,b){if(a.length){try{var c=new window.Audio}catch(d){return}for(var e,f=0;f<a.length;f++){var g=a[f],h=g.match(/\.(\w+)$/);if(h&&c.canPlayType("audio/"+h[1])){e=new window.Audio(g);break}}e&&e.play&&(this.SOUNDS_[b]=e)}};
 Blockly.WorkspaceSvg.prototype.preloadAudio_=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}};
@@ -1010,7 +1010,8 @@ Blockly.WorkspaceSvg.prototype.playAudio=function(a,b){var c=this.SOUNDS_[a];c?(
 Blockly.WorkspaceSvg.prototype.updateToolbox=function(a){if(a=Blockly.parseToolboxTree_(a)){if(!this.options.languageTree)throw"Existing toolbox is null.  Can't create new toolbox.";if(this.options.hasCategories){if(!this.toolbox_)throw"Existing toolbox has no categories.  Can't change mode.";this.options.languageTree=a;this.toolbox_.populate_(a)}else{if(!this.flyout_)throw"Existing toolbox has categories.  Can't change mode.";this.options.languageTree=a;this.flyout_.show(a.childNodes)}}else if(this.options.languageTree)throw"Can't nullify an existing toolbox.";
 };Blockly.WorkspaceSvg.prototype.addChangeListener=function(a){a=Blockly.bindEvent_(this.getCanvas(),"blocklyWorkspaceChange",null,a);Array.prototype.push.apply(this.eventWrappers_,a);return a};Blockly.WorkspaceSvg.prototype.removeChangeListener=function(a){Blockly.unbindEvent_(a);a=this.eventWrappers_.indexOf(a);-1!=a&&this.eventWrappers_.splice(a,1)};Blockly.WorkspaceSvg.prototype.markFocused=function(){Blockly.mainWorkspace=this};
 Blockly.WorkspaceSvg.prototype.zoom=function(a,b,c){var d=this.options.zoomOptions.scaleSpeed,e=this.getMetrics(),f=this.options.svg.createSVGPoint();f.x=a;f.y=b;f=f.matrixTransform(this.getCanvas().getCTM().inverse());a=f.x;b=f.y;f=this.getCanvas();c=1==c?d:1/d;d=this.scale*c;d>this.options.zoomOptions.maxScale?c=this.options.zoomOptions.maxScale/this.scale:d<this.options.zoomOptions.minScale&&(c=this.options.zoomOptions.minScale/this.scale);a=f.getCTM().translate(a*(1-c),b*(1-c)).scale(c);this.scale!=
-a.a&&(this.scale=a.a,this.scrollX=a.e-e.absoluteLeft,this.scrollY=a.f-e.absoluteTop,this.updateGridPattern_(),this.scrollbar.resize())};Blockly.WorkspaceSvg.prototype.zoomCenter=function(a){var b=this.getMetrics();this.zoom(b.viewWidth/2,b.viewHeight/2,a)};Blockly.WorkspaceSvg.prototype.zoomReset=function(){this.scale=1;this.updateGridPattern_();var a=this.getMetrics();this.scrollbar.set((a.contentWidth-a.viewWidth)/2,(a.contentHeight-a.viewHeight)/2)};
+a.a&&(this.scale=a.a,this.scrollX=a.e-e.absoluteLeft,this.scrollY=a.f-e.absoluteTop,this.updateGridPattern_(),this.scrollbar.resize(),Blockly.hideChaff(!1),this.flyout_&&this.flyout_.reflow())};Blockly.WorkspaceSvg.prototype.zoomCenter=function(a){var b=this.getMetrics();this.zoom(b.viewWidth/2,b.viewHeight/2,a)};
+Blockly.WorkspaceSvg.prototype.zoomReset=function(){this.scale=1;this.updateGridPattern_();var a=this.getMetrics();this.scrollbar.set((a.contentWidth-a.viewWidth)/2,(a.contentHeight-a.viewHeight)/2);Blockly.hideChaff(!1);this.flyout_&&this.flyout_.reflow()};
 Blockly.WorkspaceSvg.prototype.updateGridPattern_=function(){if(this.options.gridPattern){var a=this.options.gridOptions.spacing*this.scale||100;this.options.gridPattern.setAttribute("width",a);this.options.gridPattern.setAttribute("height",a);var a=Math.floor(this.options.gridOptions.spacing/2)+.5,b=a-this.options.gridOptions.length/2,c=a+this.options.gridOptions.length/2,d=this.options.gridPattern.firstChild,e=d&&d.nextSibling,a=a*this.scale,b=b*this.scale,c=c*this.scale;d&&(d.setAttribute("stroke-width",
 this.scale),d.setAttribute("x1",b),d.setAttribute("y1",a),d.setAttribute("x2",c),d.setAttribute("y2",a));e&&(e.setAttribute("stroke-width",this.scale),e.setAttribute("x1",a),e.setAttribute("y1",b),e.setAttribute("x2",a),e.setAttribute("y2",c))}};Blockly.WorkspaceSvg.prototype.setVisible=Blockly.WorkspaceSvg.prototype.setVisible;Blockly.WorkspaceSvg.prototype.addChangeListener=Blockly.WorkspaceSvg.prototype.addChangeListener;Blockly.WorkspaceSvg.prototype.removeChangeListener=Blockly.WorkspaceSvg.prototype.removeChangeListener;Blockly.Mutator=function(a){Blockly.Mutator.superClass_.constructor.call(this,null);this.quarkNames_=a};goog.inherits(Blockly.Mutator,Blockly.Icon);Blockly.Mutator.prototype.png_="data:image/png;base64,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";
 Blockly.Mutator.prototype.workspaceWidth_=0;Blockly.Mutator.prototype.workspaceHeight_=0;Blockly.Mutator.prototype.iconClick_=function(a){this.block_.isEditable()&&Blockly.Icon.prototype.iconClick_.call(this,a)};
@@ -1241,14 +1242,14 @@ Blockly.Flyout.prototype.show=function(a){this.hide();for(var b=this.workspace_.
 else for(var h=0;d=a[h];h++)d.tagName&&"BLOCK"==d.tagName.toUpperCase()&&(d=Blockly.Xml.domToBlock(this.workspace_,d),b.push(d),g.push(3*f));a=f;for(h=0;d=b[h];h++){c=d.getDescendants();e=0;for(var k;k=c[e];e++)k.isInFlyout=!0,k.setCommentText(null);d.render();k=d.getSvgRoot();e=d.getHeightWidth();c=this.RTL?0:f/this.workspace_.scale+Blockly.BlockSvg.TAB_WIDTH;d.moveBy(c,a);a+=e.height+g[h];e=Blockly.createSvgElement("rect",{"fill-opacity":0},null);this.workspace_.getCanvas().insertBefore(e,d.getSvgRoot());
 d.flyoutRect_=e;this.buttons_[h]=e;this.autoClose?this.listeners_.push(Blockly.bindEvent_(k,"mousedown",null,this.createBlockFunc_(d))):this.listeners_.push(Blockly.bindEvent_(k,"mousedown",null,this.blockMouseDown_(d)));this.listeners_.push(Blockly.bindEvent_(k,"mouseover",d,d.addSelect));this.listeners_.push(Blockly.bindEvent_(k,"mouseout",d,d.removeSelect));this.listeners_.push(Blockly.bindEvent_(e,"mousedown",null,this.createBlockFunc_(d)));this.listeners_.push(Blockly.bindEvent_(e,"mouseover",
 d,d.addSelect));this.listeners_.push(Blockly.bindEvent_(e,"mouseout",d,d.removeSelect))}this.listeners_.push(Blockly.bindEvent_(this.svgBackground_,"mouseover",this,function(a){a=this.workspace_.getTopBlocks(!1);for(var b=0,c;c=a[b];b++)c.removeSelect()}));this.width_=0;this.reflow();this.filterForCapacity_();Blockly.fireUiEventNow(window,"resize");this.reflowWrapper_=Blockly.bindEvent_(this.workspace_.getCanvas(),"blocklyWorkspaceChange",this,this.reflow);this.workspace_.fireChangeEvent()};
-Blockly.Flyout.prototype.reflow=function(){for(var a=0,b=this.CORNER_RADIUS,c=this.workspace_.getTopBlocks(!1),d=0,e;e=c[d];d++){var f=e.getHeightWidth().width;e.outputConnection&&(f-=Blockly.BlockSvg.TAB_WIDTH);a=Math.max(a,f)}a+=Blockly.BlockSvg.TAB_WIDTH;a*=this.workspace_.scale;a+=1.5*b+Blockly.Scrollbar.scrollbarThickness;if(this.width_!=a){for(d=0;e=c[d];d++){f=e.getHeightWidth();if(this.RTL){var g=a-b,g=g/this.workspace_.scale,g=g-Blockly.BlockSvg.TAB_WIDTH;e.moveBy(g,0)}if(e.flyoutRect_){e.flyoutRect_.setAttribute("width",
-f.width);e.flyoutRect_.setAttribute("height",f.height);var g=e.outputConnection?Blockly.BlockSvg.TAB_WIDTH:0,h=e.getRelativeToSurfaceXY();e.flyoutRect_.setAttribute("x",this.RTL?h.x-f.width+g:h.x-g);e.flyoutRect_.setAttribute("y",h.y)}}this.width_=a;Blockly.fireUiEvent(window,"resize")}};
+Blockly.Flyout.prototype.reflow=function(){this.workspace_.scale=this.targetWorkspace_.scale;for(var a=0,b=this.CORNER_RADIUS,c=this.workspace_.getTopBlocks(!1),d=0,e;e=c[d];d++){var f=e.getHeightWidth().width;e.outputConnection&&(f-=Blockly.BlockSvg.TAB_WIDTH);a=Math.max(a,f)}a+=Blockly.BlockSvg.TAB_WIDTH;a*=this.workspace_.scale;a+=1.5*b+Blockly.Scrollbar.scrollbarThickness;if(this.width_!=a){for(d=0;e=c[d];d++){f=e.getHeightWidth();if(this.RTL){var g=e.getRelativeToSurfaceXY().x,h=a-b,h=h/this.workspace_.scale,
+h=h-Blockly.BlockSvg.TAB_WIDTH;e.moveBy(h-g,0)}e.flyoutRect_&&(e.flyoutRect_.setAttribute("width",f.width),e.flyoutRect_.setAttribute("height",f.height),g=e.outputConnection?Blockly.BlockSvg.TAB_WIDTH:0,h=e.getRelativeToSurfaceXY(),e.flyoutRect_.setAttribute("x",this.RTL?h.x-f.width+g:h.x-g),e.flyoutRect_.setAttribute("y",h.y))}this.width_=a;Blockly.fireUiEvent(window,"resize")}};
 Blockly.Flyout.prototype.blockMouseDown_=function(a){var b=this;return function(c){Blockly.terminateDrag_();Blockly.hideChaff();Blockly.isRightButton(c)?a.showContextMenu_(c):(Blockly.removeAllRanges(),Blockly.Css.setCursor(Blockly.Css.Cursor.CLOSED),Blockly.Flyout.startDownEvent_=c,Blockly.Flyout.startBlock_=a,Blockly.Flyout.startFlyout_=b,Blockly.Flyout.onMouseUpWrapper_=Blockly.bindEvent_(document,"mouseup",this,Blockly.terminateDrag_),Blockly.Flyout.onMouseMoveBlockWrapper_=Blockly.bindEvent_(document,
 "mousemove",this,b.onMouseMoveBlock_));c.stopPropagation()}};Blockly.Flyout.prototype.onMouseDown_=function(a){Blockly.isRightButton(a)||(Blockly.hideChaff(!0),Blockly.Flyout.terminateDrag_(),this.startDragMouseY_=a.clientY,Blockly.Flyout.onMouseMoveWrapper_=Blockly.bindEvent_(document,"mousemove",this,this.onMouseMove_),Blockly.Flyout.onMouseUpWrapper_=Blockly.bindEvent_(document,"mouseup",this,Blockly.Flyout.terminateDrag_),a.preventDefault(),a.stopPropagation())};
 Blockly.Flyout.prototype.onMouseMove_=function(a){var b=a.clientY-this.startDragMouseY_;this.startDragMouseY_=a.clientY;a=this.getMetrics_();b=a.viewTop-b;b=Math.min(b,a.contentHeight-a.viewHeight);b=Math.max(b,0);this.scrollbar_.set(b)};
 Blockly.Flyout.prototype.onMouseMoveBlock_=function(a){if("mousemove"==a.type&&1>=a.clientX&&0==a.clientY&&0==a.button)a.stopPropagation();else{Blockly.removeAllRanges();var b=a.clientX-Blockly.Flyout.startDownEvent_.clientX;a=a.clientY-Blockly.Flyout.startDownEvent_.clientY;Math.sqrt(b*b+a*a)>Blockly.DRAG_RADIUS&&Blockly.Flyout.startFlyout_.createBlockFunc_(Blockly.Flyout.startBlock_)(Blockly.Flyout.startDownEvent_)}};
-Blockly.Flyout.prototype.createBlockFunc_=function(a){var b=this,c=this.targetWorkspace_;return function(d){if(!Blockly.isRightButton(d)&&!a.disabled){var e=Blockly.Xml.blockToDom_(a),e=Blockly.Xml.domToBlock(c,e),f=a.getSvgRoot();if(!f)throw"originBlock is not rendered.";var f=Blockly.getSvgXY_(f,c),g=e.getSvgRoot();if(!g)throw"block is not rendered.";if(1==c.scale){var h=Blockly.getSvgXY_(g,c);e.moveBy(f.x-h.x,f.y-h.y)}else{var k=Blockly.mouseToSvg(d,c.options.svg),h=k.x-f.x,k=k.y-f.y;f.x/=c.scale;
-f.y/=c.scale;var l=Blockly.getRelativeXY_(c.getCanvas()),g=Blockly.getRelativeXY_(g);e.moveBy(f.x-(l.x/c.scale+g.x)-(h-h/c.scale),f.y-(l.y/c.scale+g.y)-(k-k/c.scale))}b.autoClose?b.hide():b.filterForCapacity_();e.onMouseDown_(d)}}};Blockly.Flyout.prototype.filterForCapacity_=function(){for(var a=this.targetWorkspace_.remainingCapacity(),b=this.workspace_.getTopBlocks(!1),c=0,d;d=b[c];c++){var e=d.getDescendants().length>a;d.setDisabled(e)}};
+Blockly.Flyout.prototype.createBlockFunc_=function(a){var b=this,c=this.targetWorkspace_;return function(d){if(!Blockly.isRightButton(d)&&!a.disabled){var e=Blockly.Xml.blockToDom_(a),e=Blockly.Xml.domToBlock(c,e),f=a.getSvgRoot();if(!f)throw"originBlock is not rendered.";f=Blockly.getSvgXY_(f,c);if(b.RTL){var g=c.getMetrics().viewWidth-b.width_;f.x+=g/c.scale-g}else f.x+=b.workspace_.scrollX/b.workspace_.scale-b.workspace_.scrollX;f.y+=b.workspace_.scrollY/b.workspace_.scale-b.workspace_.scrollY;
+g=e.getSvgRoot();if(!g)throw"block is not rendered.";g=Blockly.getSvgXY_(g,c);g.x+=c.scrollX/c.scale-c.scrollX;g.y+=c.scrollY/c.scale-c.scrollY;e.moveBy(f.x-g.x,f.y-g.y);b.autoClose?b.hide():b.filterForCapacity_();e.onMouseDown_(d)}}};Blockly.Flyout.prototype.filterForCapacity_=function(){for(var a=this.targetWorkspace_.remainingCapacity(),b=this.workspace_.getTopBlocks(!1),c=0,d;d=b[c];c++){var e=d.getDescendants().length>a;d.setDisabled(e)}};
 Blockly.Flyout.prototype.getRect=function(){var a=Blockly.mainWorkspace,b=Blockly.getSvgXY_(this.svgGroup_,a).x;this.RTL||(b-=1E9);return new goog.math.Rect(b,-1E9,1E9+this.width_*(this.targetWorkspace_==a?1:a.scale),2E9)};
 Blockly.Flyout.terminateDrag_=function(){Blockly.Flyout.onMouseUpWrapper_&&(Blockly.unbindEvent_(Blockly.Flyout.onMouseUpWrapper_),Blockly.Flyout.onMouseUpWrapper_=null);Blockly.Flyout.onMouseMoveBlockWrapper_&&(Blockly.unbindEvent_(Blockly.Flyout.onMouseMoveBlockWrapper_),Blockly.Flyout.onMouseMoveBlockWrapper_=null);Blockly.Flyout.onMouseMoveWrapper_&&(Blockly.unbindEvent_(Blockly.Flyout.onMouseMoveWrapper_),Blockly.Flyout.onMouseMoveWrapper_=null);Blockly.Flyout.onMouseUpWrapper_&&(Blockly.unbindEvent_(Blockly.Flyout.onMouseUpWrapper_),
 Blockly.Flyout.onMouseUpWrapper_=null);Blockly.Flyout.startDownEvent_=null;Blockly.Flyout.startBlock_=null;Blockly.Flyout.startFlyout_=null};Blockly.Toolbox=function(a){this.workspace_=a};Blockly.Toolbox.prototype.width=0;Blockly.Toolbox.prototype.selectedOption_=null;Blockly.Toolbox.prototype.lastCategory_=null;Blockly.Toolbox.prototype.CONFIG_={indentWidth:19,cssRoot:"blocklyTreeRoot",cssHideRoot:"blocklyHidden",cssItem:"",cssTreeRow:"blocklyTreeRow",cssItemLabel:"blocklyTreeLabel",cssTreeIcon:"blocklyTreeIcon",cssExpandedFolderIcon:"blocklyTreeIconOpen",cssFileIcon:"blocklyTreeIconNone",cssSelectedRow:"blocklyTreeSelected"};
@@ -1305,8 +1306,8 @@ Blockly.bindEvent_.TOUCH_MAP={};goog.events.BrowserFeature.TOUCH_ENABLED&&(Block
 Blockly.fireUiEventNow=function(a,b){var c=Blockly.fireUiEvent.DB_[b];if(c){var d=c.indexOf(a);-1!=d&&c.splice(d,1)}if(document.createEvent)c=document.createEvent("UIEvents"),c.initEvent(b,!0,!0),a.dispatchEvent(c);else if(document.createEventObject)c=document.createEventObject(),a.fireEvent("on"+b,c);else throw"FireEvent: No event creation mechanism.";};
 Blockly.fireUiEvent=function(a,b){var c=Blockly.fireUiEvent.DB_[b];if(c){if(-1!=c.indexOf(a))return;c.push(a)}else Blockly.fireUiEvent.DB_[b]=[a];setTimeout(function(){Blockly.fireUiEventNow(a,b)},0)};Blockly.fireUiEvent.DB_={};Blockly.noEvent=function(a){a.preventDefault();a.stopPropagation()};
 Blockly.isTargetInput_=function(a){return"textarea"==a.target.type||"text"==a.target.type||"number"==a.target.type||"email"==a.target.type||"password"==a.target.type||"search"==a.target.type||"tel"==a.target.type||"url"==a.target.type||a.target.isContentEditable};
-Blockly.getRelativeXY_=function(a){var b={x:0,y:0},c=a.getAttribute("x");c&&(b.x=parseInt(c,10));if(c=a.getAttribute("y"))b.y=parseInt(c,10);if(a=(a=a.getAttribute("transform"))&&a.match(Blockly.getRelativeXY_.XY_REGEXP_))b.x+=parseFloat(a[1]),a[3]&&(b.y+=parseFloat(a[3]));return b};Blockly.getRelativeXY_.XY_REGEXP_=/translate\(\s*([-+\d.e]+)([ ,]\s*([-+\d.e]+)\s*\))?/;
-Blockly.getSvgXY_=function(a,b){var c=0,d=0,e=!goog.dom.contains(b.getCanvas(),a)&&!goog.dom.contains(b.getBubbleCanvas(),a);do{var f=Blockly.getRelativeXY_(a);if(a==b.getCanvas()||a==b.getBubbleCanvas())e=!0;e?(c+=f.x,d+=f.y):(c+=f.x*b.scale,d+=f.y*b.scale);a=a.parentNode}while(a&&a!=b.options.svg);return{x:c,y:d}};
+Blockly.getRelativeXY_=function(a){var b=new goog.math.Coordinate(0,0),c=a.getAttribute("x");c&&(b.x=parseInt(c,10));if(c=a.getAttribute("y"))b.y=parseInt(c,10);if(a=(a=a.getAttribute("transform"))&&a.match(Blockly.getRelativeXY_.XY_REGEXP_))b.x+=parseFloat(a[1]),a[3]&&(b.y+=parseFloat(a[3]));return b};Blockly.getRelativeXY_.XY_REGEXP_=/translate\(\s*([-+\d.e]+)([ ,]\s*([-+\d.e]+)\s*\))?/;
+Blockly.getSvgXY_=function(a,b){var c=0,d=0,e=1;if(goog.dom.contains(b.getCanvas(),a)||goog.dom.contains(b.getBubbleCanvas(),a))e=b.scale;do{var f=Blockly.getRelativeXY_(a);if(a==b.getCanvas()||a==b.getBubbleCanvas())e=1;c+=f.x*e;d+=f.y*e;a=a.parentNode}while(a&&a!=b.options.svg);return new goog.math.Coordinate(c,d)};
 Blockly.createSvgElement=function(a,b,c,d){a=document.createElementNS(Blockly.SVG_NS,a);for(var e in b)a.setAttribute(e,b[e]);document.body.runtimeStyle&&(a.runtimeStyle=a.currentStyle=a.style);c&&c.appendChild(a);return a};Blockly.removeAllRanges=function(){window.getSelection&&setTimeout(function(){try{var a=window.getSelection();a.isCollapsed||a.removeAllRanges()}catch(b){}},0)};Blockly.isRightButton=function(a){return a.ctrlKey&&goog.userAgent.MAC?!0:2==a.button};
 Blockly.mouseToSvg=function(a,b){var c=b.createSVGPoint();c.x=a.clientX;c.y=a.clientY;var d=b.getScreenCTM(),d=d.inverse();return c.matrixTransform(d)};Blockly.shortestStringLength=function(a){if(!a.length)return 0;for(var b=a[0].length,c=1;c<a.length;c++)b=Math.min(b,a[c].length);return b};
 Blockly.commonWordPrefix=function(a,b){if(!a.length)return 0;if(1==a.length)return a[0].length;for(var c=0,d=b||Blockly.shortestStringLength(a),e=0;e<d;e++){for(var f=a[0][e],g=1;g<a.length;g++)if(f!=a[g][e])return c;" "==f&&(c=e+1)}for(g=1;g<a.length;g++)if((f=a[g][e])&&" "!=f)return c;return d};
diff --git a/blockly_uncompressed.js b/blockly_uncompressed.js
index 7f254a7d4..c79147ed2 100644
--- a/blockly_uncompressed.js
+++ b/blockly_uncompressed.js
@@ -59,7 +59,7 @@ goog.addDependency("../../../" + dir + "/core/scrollbar.js", ['Blockly.Scrollbar
 goog.addDependency("../../../" + dir + "/core/toolbox.js", ['Blockly.Toolbox'], ['Blockly.Flyout', 'goog.dom', 'goog.events', 'goog.events.BrowserFeature', 'goog.html.SafeHtml', 'goog.math.Rect', 'goog.style', 'goog.ui.tree.TreeControl', 'goog.ui.tree.TreeNode']);
 goog.addDependency("../../../" + dir + "/core/tooltip.js", ['Blockly.Tooltip'], ['goog.dom']);
 goog.addDependency("../../../" + dir + "/core/trashcan.js", ['Blockly.Trashcan'], ['goog.Timer', 'goog.dom', 'goog.math', 'goog.math.Rect']);
-goog.addDependency("../../../" + dir + "/core/utils.js", ['Blockly.utils'], ['goog.events.BrowserFeature', 'goog.userAgent', 'goog.dom']);
+goog.addDependency("../../../" + dir + "/core/utils.js", ['Blockly.utils'], ['goog.dom', 'goog.events.BrowserFeature', 'goog.math.Coordinate', 'goog.userAgent']);
 goog.addDependency("../../../" + dir + "/core/variables.js", ['Blockly.Variables'], ['Blockly.Workspace', 'goog.string']);
 goog.addDependency("../../../" + dir + "/core/warning.js", ['Blockly.Warning'], ['Blockly.Bubble', 'Blockly.Icon']);
 goog.addDependency("../../../" + dir + "/core/widgetdiv.js", ['Blockly.WidgetDiv'], ['Blockly.Css', 'goog.dom']);