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Add a Lua code generator

Browse Source 
This is based on the JS generator, with a lot of inspiration from Ellen
Spertus's blockly-lua: https://github.com/espertus/blockly-lua

All unit tests pass with Lua 5.3.2.
This commit is contained in:
Rodrigo Queiro
2016-02-04 16:54:52 +01:00
parent 0db36f3866
commit a5d3f340e5
19 changed files with 2090 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
appengine/README.txt
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@@ -30,6 +30,7 @@ blockly/
|- blocks_compressed.js |- blocks_compressed.js
|- dart_compressed.js |- dart_compressed.js
|- javascript_compressed.js |- javascript_compressed.js
|- lua_compressed.js
|- php_compressed.js |- php_compressed.js
`- python_compressed.js `- python_compressed.js

2
build.py
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@@ -33,6 +33,7 @@
# javascript_compressed.js: The compressed Javascript generator. # javascript_compressed.js: The compressed Javascript generator.
# python_compressed.js: The compressed Python generator. # python_compressed.js: The compressed Python generator.
# dart_compressed.js: The compressed Dart generator. # dart_compressed.js: The compressed Dart generator.
# lua_compressed.js: The compressed Lua generator.
# msg/js/<LANG>.js for every language <LANG> defined in msg/js/<LANG>.json. # msg/js/<LANG>.js for every language <LANG> defined in msg/js/<LANG>.json.
import sys import sys
@@ -178,6 +179,7 @@ class Gen_compressed(threading.Thread):
self.gen_generator("python") self.gen_generator("python")
self.gen_generator("php") self.gen_generator("php")
self.gen_generator("dart") self.gen_generator("dart")
self.gen_generator("lua")
def gen_core(self): def gen_core(self):
target_filename = "blockly_compressed.js" target_filename = "blockly_compressed.js"

1
demos/blockfactory/index.html
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@@ -161,6 +161,7 @@
<option value="Python">Python</option> <option value="Python">Python</option>
<option value="PHP">PHP</option> <option value="PHP">PHP</option>
<option value="Dart">Dart</option> <option value="Dart">Dart</option>
<option value="Lua">Lua</option>
</select> </select>
</h3> </h3>
</td> </td>

10
demos/code/code.js
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@@ -244,7 +244,7 @@ Code.LANG = Code.getLang();
* List of tab names. * List of tab names.
* @private * @private
*/ */
Code.TABS_ = ['blocks', 'javascript', 'php', 'python', 'dart', 'xml']; Code.TABS_ = ['blocks', 'javascript', 'php', 'python', 'dart', 'lua', 'xml'];
Code.selected = 'blocks'; Code.selected = 'blocks';
@@ -341,6 +341,14 @@ Code.renderContent = function() {
code = prettyPrintOne(code, 'dart'); code = prettyPrintOne(code, 'dart');
content.innerHTML = code; content.innerHTML = code;
} }
} else if (content.id == 'content_lua') {
code = Blockly.Lua.workspaceToCode(Code.workspace);
content.textContent = code;
if (typeof prettyPrintOne == 'function') {
code = content.innerHTML;
code = prettyPrintOne(code, 'lua');
content.innerHTML = code;
}
} }
}; };

4
demos/code/index.html
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@@ -12,6 +12,7 @@
<script src="../../python_compressed.js"></script> <script src="../../python_compressed.js"></script>
<script src="../../php_compressed.js"></script> <script src="../../php_compressed.js"></script>
<script src="../../dart_compressed.js"></script> <script src="../../dart_compressed.js"></script>
<script src="../../lua_compressed.js"></script>
<script src="code.js"></script> <script src="code.js"></script>
</head> </head>
<body> <body>
@@ -41,6 +42,8 @@
<td class="tabmin">&nbsp;</td> <td class="tabmin">&nbsp;</td>
<td id="tab_dart" class="taboff">Dart</td> <td id="tab_dart" class="taboff">Dart</td>
<td class="tabmin">&nbsp;</td> <td class="tabmin">&nbsp;</td>
<td id="tab_lua" class="taboff">Lua</td>
<td class="tabmin">&nbsp;</td>
<td id="tab_xml" class="taboff">XML</td> <td id="tab_xml" class="taboff">XML</td>
<td class="tabmax"> <td class="tabmax">
<button id="trashButton" class="notext" title="..."> <button id="trashButton" class="notext" title="...">
@@ -67,6 +70,7 @@
<pre id="content_php" class="content"></pre> <pre id="content_php" class="content"></pre>
<pre id="content_python" class="content"></pre> <pre id="content_python" class="content"></pre>
<pre id="content_dart" class="content"></pre> <pre id="content_dart" class="content"></pre>
<pre id="content_lua" class="content"></pre>
<textarea id="content_xml" class="content" wrap="off"></textarea> <textarea id="content_xml" class="content" wrap="off"></textarea>
<xml id="toolbox" style="display: none"> <xml id="toolbox" style="display: none">

2
demos/index.html
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@@ -168,7 +168,7 @@
</td> </td>
<td> <td>
<div><a href="code/index.html">Code Editor</a></div> <div><a href="code/index.html">Code Editor</a></div>
<div>Export a Blockly program into JavaScript, Python, PHP, Dart or XML.</div> <div>Export a Blockly program into JavaScript, Python, PHP, Dart, Lua or XML.</div>
</td> </td>
</tr> </tr>

188
generators/lua.js Normal file
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@@ -0,0 +1,188 @@
/**
* @license
* Visual Blocks Language
*
* Copyright 2016 Google Inc.
* https://developers.google.com/blockly/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Helper functions for generating Lua for blocks.
* @author rodrigoq@google.com (Rodrigo Queiro)
* Based on Ellen Spertus's blocky-lua project.
*/
'use strict';
goog.provide('Blockly.Lua');
goog.require('Blockly.Generator');
/**
* Lua code generator.
* @type {!Blockly.Generator}
*/
Blockly.Lua = new Blockly.Generator('Lua');
/**
* List of illegal variable names.
* This is not intended to be a security feature. Blockly is 100% client-side,
* so bypassing this list is trivial. This is intended to prevent users from
* accidentally clobbering a built-in object or function.
* @private
*/
Blockly.Lua.addReservedWords(
// Special character
'_' +
// From theoriginalbit's script:
// https://github.com/espertus/blockly-lua/issues/6
'__inext,assert,bit,colors,colours,coroutine,disk,dofile,error,fs,' +
'fetfenv,getmetatable,gps,help,io,ipairs,keys,loadfile,loadstring,math,' +
'native,next,os,paintutils,pairs,parallel,pcall,peripheral,print,' +
'printError,rawequal,rawget,rawset,read,rednet,redstone,rs,select,' +
'setfenv,setmetatable,sleep,string,table,term,textutils,tonumber,' +
'tostring,turtle,type,unpack,vector,write,xpcall,_VERSION,__indext,' +
// Not included in the script, probably because it wasn't enabled:
'HTTP,' +
// Keywords (http://www.lua.org/pil/1.3.html).
'and,break,do,else,elseif,end,false,for,function,if,in,local,nil,not,or,' +
'repeat,return,then,true,until,while,' +
// Metamethods (http://www.lua.org/manual/5.2/manual.html).
'add,sub,mul,div,mod,pow,unm,concat,len,eq,lt,le,index,newindex,call,' +
// Basic functions (http://www.lua.org/manual/5.2/manual.html, section 6.1).
'assert,collectgarbage,dofile,error,_G,getmetatable,inpairs,load,' +
'loadfile,next,pairs,pcall,print,rawequal,rawget,rawlen,rawset,select,' +
'setmetatable,tonumber,tostring,type,_VERSION,xpcall,' +
// Modules (http://www.lua.org/manual/5.2/manual.html, section 6.3).
'require,package,string,table,math,bit32,io,file,os,debug'
);
/**
* Order of operation ENUMs.
* http://www.lua.org/manual/5.3/manual.html#3.4.8
*/
Blockly.Lua.ORDER_ATOMIC = 0; // literals
// The next level was not explicit in documentation and inferred by Ellen.
Blockly.Lua.ORDER_HIGH = 1; // Function calls, tables[]
Blockly.Lua.ORDER_EXPONENTIATION = 2; // ^
Blockly.Lua.ORDER_UNARY = 3; // not # - ()
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; // and
Blockly.Lua.ORDER_OR = 9; // or
Blockly.Lua.ORDER_NONE = 99;
/**
* Initialise the database of variable names.
* @param {!Blockly.Workspace} workspace Workspace to generate code from.
*/
Blockly.Lua.init = function(workspace) {
// Create a dictionary of definitions to be printed before the code.
Blockly.Lua.definitions_ = Object.create(null);
// Create a dictionary mapping desired function names in definitions_
// to actual function names (to avoid collisions with user functions).
Blockly.Lua.functionNames_ = Object.create(null);
if (!Blockly.Lua.variableDB_) {
Blockly.Lua.variableDB_ =
new Blockly.Names(Blockly.Lua.RESERVED_WORDS_);
} else {
Blockly.Lua.variableDB_.reset();
}
};
/**
* Prepend the generated code with the variable definitions.
* @param {string} code Generated code.
* @return {string} Completed code.
*/
Blockly.Lua.finish = function(code) {
// Convert the definitions dictionary into a list.
var definitions = [];
for (var name in Blockly.Lua.definitions_) {
definitions.push(Blockly.Lua.definitions_[name]);
}
// Clean up temporary data.
delete Blockly.Lua.definitions_;
delete Blockly.Lua.functionNames_;
Blockly.Lua.variableDB_.reset();
return definitions.join('\n\n') + '\n\n\n' + code;
};
/**
* Naked values are top-level blocks with outputs that aren't plugged into
* anything. In Lua, an expression is not a legal statement, so we must assign
* the value to the (conventionally ignored) _.
* http://lua-users.org/wiki/ExpressionsAsStatements
* @param {string} line Line of generated code.
* @return {string} Legal line of code.
*/
Blockly.Lua.scrubNakedValue = function(line) {
return 'local _ = ' + line + '\n';
};
/**
* Encode a string as a properly escaped Lua string, complete with
* quotes.
* @param {string} string Text to encode.
* @return {string} Lua string.
* @private
*/
Blockly.Lua.quote_ = function(string) {
// TODO: This is a quick hack. Replace with goog.string.quote
string = string.replace(/\\/g, '\\\\')
.replace(/\n/g, '\\\n')
.replace(/'/g, '\\\'');
return '\'' + string + '\'';
};
/**
* Common tasks for generating Lua from blocks.
* Handles comments for the specified block and any connected value blocks.
* Calls any statements following this block.
* @param {!Blockly.Block} block The current block.
* @param {string} code The Lua code created for this block.
* @return {string} Lua code with comments and subsequent blocks added.
* @private
*/
Blockly.Lua.scrub_ = function(block, code) {
var commentCode = '';
// Only collect comments for blocks that aren't inline.
if (!block.outputConnection || !block.outputConnection.targetConnection) {
// Collect comment for this block.
var comment = block.getCommentText();
if (comment) {
commentCode += Blockly.Lua.prefixLines(comment, '-- ') + '\n';
}
// Collect comments for all value arguments.
// Don't collect comments for nested statements.
for (var x = 0; x < block.inputList.length; x++) {
if (block.inputList[x].type == Blockly.INPUT_VALUE) {
var childBlock = block.inputList[x].connection.targetBlock();
if (childBlock) {
comment = Blockly.Lua.allNestedComments(childBlock);
if (comment) {
commentCode += Blockly.Lua.prefixLines(comment, '-- ');
}
}
}
}
}
var nextBlock = block.nextConnection && block.nextConnection.targetBlock();
var nextCode = Blockly.Lua.blockToCode(nextBlock);
return commentCode + code + nextCode;
};

90
generators/lua/colour.js Normal file
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@@ -0,0 +1,90 @@
/**
* @license
* Visual Blocks Language
*
* Copyright 2016 Google Inc.
* https://developers.google.com/blockly/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Generating Lua for colour blocks.
* @author rodrigoq@google.com (Rodrigo Queiro)
*/
'use strict';
goog.provide('Blockly.Lua.colour');
goog.require('Blockly.Lua');
Blockly.Lua['colour_picker'] = function(block) {
// Colour picker.
var code = '\'' + block.getFieldValue('COLOUR') + '\'';
return [code, Blockly.Lua.ORDER_ATOMIC];
};
Blockly.Lua['colour_random'] = function(block) {
// Generate a random colour.
var code = 'string.format("#%06x", math.random(0, 2^24 - 1))';
return [code, Blockly.Lua.ORDER_HIGH];
};
Blockly.Lua['colour_rgb'] = function(block) {
// Compose a colour from RGB components expressed as percentages.
var functionName = 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']);
var r = Blockly.Lua.valueToCode(block, 'RED',
Blockly.Lua.ORDER_NONE) || 0;
var g = Blockly.Lua.valueToCode(block, 'GREEN',
Blockly.Lua.ORDER_NONE) || 0;
var b = Blockly.Lua.valueToCode(block, 'BLUE',
Blockly.Lua.ORDER_NONE) || 0;
var code = functionName + '(' + r + ', ' + g + ', ' + b + ')';
return [code, Blockly.Lua.ORDER_HIGH];
};
Blockly.Lua['colour_blend'] = function(block) {
// Blend two colours together.
var functionName = 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))',
' local r = math.floor(r1 * (1 - ratio) + r2 * ratio + .5)',
' local g = math.floor(g1 * (1 - ratio) + g2 * ratio + .5)',
' local b = math.floor(b1 * (1 - ratio) + b2 * ratio + .5)',
' return string.format("#%02x%02x%02x", r, g, b)',
'end']);
var colour1 = Blockly.Lua.valueToCode(block, 'COLOUR1',
Blockly.Lua.ORDER_NONE) || '\'#000000\'';
var colour2 = Blockly.Lua.valueToCode(block, 'COLOUR2',
Blockly.Lua.ORDER_NONE) || '\'#000000\'';
var ratio = Blockly.Lua.valueToCode(block, 'RATIO',
Blockly.Lua.ORDER_NONE) || 0;
var code = functionName + '(' + colour1 + ', ' + colour2 + ', ' + ratio + ')';
return [code, Blockly.Lua.ORDER_HIGH];
};

363
generators/lua/lists.js Normal file
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@@ -0,0 +1,363 @@
/**
* @license
* Visual Blocks Language
*
* Copyright 2016 Google Inc.
* https://developers.google.com/blockly/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Generating Lua for list blocks.
* @author rodrigoq@google.com (Rodrigo Queiro)
*/
'use strict';
goog.provide('Blockly.Lua.lists');
goog.require('Blockly.Lua');
Blockly.Lua['lists_create_empty'] = function(block) {
// Create an empty list.
// List literals must be parenthesized before indexing into.
return ['({})', Blockly.Lua.ORDER_ATOMIC];
};
Blockly.Lua['lists_create_with'] = function(block) {
// Create a list with any number of elements of any type.
var code = new Array(block.itemCount_);
for (var n = 0; n < block.itemCount_; n++) {
code[n] = Blockly.Lua.valueToCode(block, 'ADD' + n,
Blockly.Lua.ORDER_NONE) || 'None';
}
code = '({' + code.join(', ') + '})';
return [code, Blockly.Lua.ORDER_ATOMIC];
};
Blockly.Lua['lists_repeat'] = function(block) {
// Create a list with one element repeated.
var functionName = Blockly.Lua.provideFunction_(
'create_list_repeated',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(item, count)',
' local t = {}',
' for i = 1, count do',
' table.insert(t, item)',
' end',
' return t',
'end']);
var argument0 = Blockly.Lua.valueToCode(block, 'ITEM',
Blockly.Lua.ORDER_NONE) || 'None';
var argument1 = Blockly.Lua.valueToCode(block, 'NUM',
Blockly.Lua.ORDER_NONE) || '0';
var code = functionName + '(' + argument0 + ', ' + argument1 + ')';
return [code, Blockly.Lua.ORDER_HIGH];
};
Blockly.Lua['lists_length'] = function(block) {
// String or array length.
var argument0 = Blockly.Lua.valueToCode(block, 'VALUE',
Blockly.Lua.ORDER_HIGH) || '({})';
return ['#' + argument0, Blockly.Lua.ORDER_HIGH];
};
Blockly.Lua['lists_isEmpty'] = function(block) {
// Is the string null or array empty?
var argument0 = Blockly.Lua.valueToCode(block, 'VALUE',
Blockly.Lua.ORDER_HIGH) || '({})';
var code = '#' + argument0 + ' == 0';
return [code, Blockly.Lua.ORDER_RELATIONAL];
};
Blockly.Lua['lists_indexOf'] = function(block) {
// Find an item in the list.
var argument0 = Blockly.Lua.valueToCode(block, 'FIND',
Blockly.Lua.ORDER_NONE) || '\'\'';
var argument1 = Blockly.Lua.valueToCode(block, 'VALUE',
Blockly.Lua.ORDER_NONE) || '({})';
var functionName;
if (block.getTitleValue('END') == 'FIRST') {
functionName = Blockly.Lua.provideFunction_(
'first_index',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(t, elem)',
' for k, v in ipairs(t) do',
' if v == elem then',
' return k',
' end',
' end',
' return 0',
'end']);
} else {
functionName = Blockly.Lua.provideFunction_(
'last_index',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(t, elem)',
' for i = #t, 1, -1 do',
' if t[i] == elem then',
' return i',
' end',
' end',
' return 0',
'end']);
}
var code = functionName + '(' + argument1 + ', ' + argument0 + ')';
return [code, Blockly.Lua.ORDER_HIGH];
};
/**
* Returns an expression calculating the index into a list.
* @private
* @param {string} listname Name of the list, used to calculate length.
* @param {string} where The method of indexing, selected by dropdown in Blockly
* @param {=string} opt_at The optional offset when indexing from start/end.
* @return {string} Index expression.
*/
Blockly.Lua.lists.getIndex_ = function(listname, where, opt_at) {
if (where == 'FIRST') {
return 1;
} else if (where == 'FROM_END') {
return '#' + listname + ' + 1 - ' + opt_at;
} else if (where == 'LAST') {
return '#' + listname;
} else if (where == 'RANDOM') {
return 'math.random(#' + listname + ')';
} else {
return opt_at;
}
};
/**
* Counter for generating unique symbols.
* @private
* @type {number}
*/
Blockly.Lua.lists.gensym_counter_ = 0;
/**
* Generate a unique symbol.
* @private
* @return {string} unique symbol, eg 'G123'
*/
Blockly.Lua.lists.gensym_ = function() {
return 'G' + Blockly.Lua.lists.gensym_counter_++;
};
Blockly.Lua['lists_getIndex'] = function(block) {
// Get element at index.
// Note: Until January 2013 this block did not have MODE or WHERE inputs.
var mode = block.getTitleValue('MODE') || 'GET';
var where = block.getTitleValue('WHERE') || 'FROM_START';
var at = Blockly.Lua.valueToCode(block, 'AT',
Blockly.Lua.ORDER_ADDITIVE) || '1';
var list = Blockly.Lua.valueToCode(block, 'VALUE',
Blockly.Lua.ORDER_HIGH) || '({})';
var getIndex_ = Blockly.Lua.lists.getIndex_;
var gensym_ = Blockly.Lua.lists.gensym_;
// If `list` would be evaluated more than once (which is the case for LAST,
// FROM_END, and RANDOM) and is non-trivial, make sure to access it only once.
if ((where == 'LAST' || where == 'FROM_END' || where == 'RANDOM') &&
!list.match(/^\w+$/)) {
// `list` is an expression, so we may not evaluate it more than once.
if (mode == 'REMOVE') {
// We can use multiple statements.
var listVar = Blockly.Lua.variableDB_.getDistinctName(
'tmp_list', Blockly.Variables.NAME_TYPE);
var code = listVar + ' = ' + list + '\n' +
'table.remove(' + listVar + ', ' + getIndex_(listVar, where, at) +
')\n';
return code;
} else {
// We need to create a procedure to avoid reevaluating values.
if (mode == 'GET') {
// Note that getIndex_() ignores `at` when `where` == 'LAST' or
// 'RANDOM', so we only need one procedure for each of those 'where'
// values. The value for 'FROM_END' depends on `at`, so we will
// generate a unique procedure (name) each time.
var functionName = Blockly.Lua.provideFunction_(
'list_get_' + where.toLowerCase() +
(where == 'FROM_END' ? '_' + gensym_() : ''),
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(t)',
' return t[' + getIndex_('t', where, at) + ']',
'end']);
} else { // mode == 'GET_REMOVE'
// We need to create a procedure.
var functionName = Blockly.Lua.provideFunction_(
'list_remove_' + where.toLowerCase() +
(where == 'FROM_END' ? '_' + gensym_() : ''),
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(t)',
' return table.remove(t, ' + getIndex_('t', where, at) + ')',
'end']);
}
var code = functionName + '(' + list + ')';
return [code, Blockly.Lua.ORDER_HIGH];
}
} else {
// Either `list` is a simple variable, or we only need to refer to `list`
// once.
if (mode == 'GET') {
var code = list + '[' + getIndex_(list, where, at) + ']';
return [code, Blockly.Lua.ORDER_HIGH];
} else {
var code = 'table.remove(' + list + ', ' + getIndex_(list, where, at) +
')';
if (mode == 'GET_REMOVE') {
return [code, Blockly.Lua.ORDER_HIGH];
} else { // `mode` == 'REMOVE'
return code + '\n';
}
}
}
};
Blockly.Lua['lists_setIndex'] = function(block) {
// Set element at index.
// Note: Until February 2013 this block did not have MODE or WHERE inputs.
var list = Blockly.Lua.valueToCode(block, 'LIST',
Blockly.Lua.ORDER_HIGH) || '({})';
var mode = block.getFieldValue('MODE') || 'SET';
var where = block.getFieldValue('WHERE') || 'FROM_START';
var at = Blockly.Lua.valueToCode(block, 'AT',
Blockly.Lua.ORDER_ADDITIVE) || '1';
var value = Blockly.Lua.valueToCode(block, 'TO',
Blockly.Lua.ORDER_NONE) || 'None';
var getIndex_ = Blockly.Lua.lists.getIndex_;
// If `list` would be evaluated more than once (which is the case for LAST,
// FROM_END, and RANDOM) and is non-trivial, make sure to access it only once.
if ((where == 'LAST' || where == 'FROM_END' || where == 'RANDOM') &&
!list.match(/^\w+$/)) {
// `list` is an expression, so we may not evaluate it more than once.
if (where == 'RANDOM' || where == 'LAST') {
// In these cases, `at` is implicit. getIndex_() ignores its value.
if (mode == 'SET') {
var functionName = Blockly.Lua.provideFunction_(
'list_set_' + where.toLowerCase(),
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(t, val)',
' t[' + getIndex_('t', where, at) + '] = val',
'end']);
} else { // `mode` == 'INSERT'
var functionName = Blockly.Lua.provideFunction_(
'list_insert_' + where.toLowerCase(),
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(t, val)',
' table.insert(t, ' +
// LAST is a special case, because we want to insert
// *after* not *before*, the existing last element.
getIndex_('t', where, at) + (where == 'LAST' ? ' + 1' : '') +
', val)',
'end']);
}
var code = functionName + '(' + list + ', ' + value + ')\n';
return code;
} else { // `where` = 'FROM_END'
if (mode == 'SET') {
var functionName = Blockly.Lua.provideFunction_(
'list_set_from_end',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ +
'(t, index, val)',
' t[#t + 1 - index] = val',
'end']);
} else { // `mode` == 'INSERT'
var functionName = Blockly.Lua.provideFunction_(
'list_insert_from_end',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ +
'(t, index, val)',
' table.insert(t, #t + 1 - index, val)',
'end']);
}
var code = functionName + '(' + list + ', ' + at + ', ' + value + ')\n';
return code;
}
} else {
// It's okay to have multiple references to the list.
if (mode == 'SET') {
var code = list + '[' + getIndex_(list, where, at) + '] = ' + value;
} else { // `mode` == 'INSERT'
// LAST is a special case, because we want to insert
// *after* not *before*, the existing last element.
var code = 'table.insert(' + list + ', ' +
(getIndex_(list, where, at) + (where == 'LAST' ? ' + 1' : '')) +
', ' + value + ')';
}
return code + '\n';
}
};
Blockly.Lua['lists_getSublist'] = function(block) {
// Get sublist.
var list = Blockly.Lua.valueToCode(block, 'LIST',
Blockly.Lua.ORDER_HIGH) || '({})';
var where1 = block.getFieldValue('WHERE1');
var where2 = block.getFieldValue('WHERE2');
var at1 = Blockly.Lua.valueToCode(block, 'AT1',
Blockly.Lua.ORDER_ADDITIVE) || '1';
var at2 = Blockly.Lua.valueToCode(block, 'AT2',
Blockly.Lua.ORDER_ADDITIVE) || '1';
var getIndex_ = Blockly.Lua.lists.getIndex_;
var functionName = Blockly.Lua.provideFunction_(
'list_sublist_' + Blockly.Lua.lists.gensym_(),
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(source)',
' local t = {}',
' local start = ' + getIndex_('source', where1, at1),
' local finish = ' + getIndex_('source', where2, at2),
' for i = start, finish do',
' table.insert(t, source[i])',
' end',
' return t',
'end']);
var code = functionName + '(' + list + ')';
return [code, Blockly.Lua.ORDER_HIGH];
};
Blockly.Lua['lists_split'] = function(block) {
// Block for splitting text into a list, or joining a list into text.
var value_input = Blockly.Lua.valueToCode(block, 'INPUT',
Blockly.Lua.ORDER_NONE);
var value_delim = Blockly.Lua.valueToCode(block, 'DELIM',
Blockly.Lua.ORDER_NONE) || '\'\'';
var mode = block.getFieldValue('MODE');
var functionName;
if (mode == 'SPLIT') {
if (!value_input) {
value_input = '\'\'';
}
functionName = Blockly.Lua.provideFunction_(
'list_string_split',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ +
'(input, delim)',
' local t = {}',
' local pos = 1',
' while true do',
' next_delim = string.find(input, delim, pos)',
' if next_delim == nil then',
' table.insert(t, string.sub(input, pos))',
' break',
' else',
' table.insert(t, string.sub(input, pos, next_delim-1))',
' pos = next_delim + #delim',
' end',
' end',
' return t',
'end']);
} else if (mode == 'JOIN') {
if (!value_input) {
value_input = '({})';
}
functionName = 'table.concat';
} else {
throw 'Unknown mode: ' + mode;
}
var code = functionName + '(' + value_input + ', ' + value_delim + ')';
return [code, Blockly.Lua.ORDER_HIGH];
};

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/**
* @license
* Visual Blocks Language
*
* Copyright 2016 Google Inc.
* https://developers.google.com/blockly/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Generating Lua for logic blocks.
* @author rodrigoq@google.com (Rodrigo Queiro)
*/
'use strict';
goog.provide('Blockly.Lua.logic');
goog.require('Blockly.Lua');
Blockly.Lua['controls_if'] = function(block) {
// If/elseif/else condition.
var n = 0;
var argument = Blockly.Lua.valueToCode(block, 'IF' + n,
Blockly.Lua.ORDER_NONE) || 'false';
var branch = Blockly.Lua.statementToCode(block, 'DO' + n);
var code = 'if ' + argument + ' then\n' + branch;
for (n = 1; n <= block.elseifCount_; n++) {
argument = Blockly.Lua.valueToCode(block, 'IF' + n,
Blockly.Lua.ORDER_NONE) || 'false';
branch = Blockly.Lua.statementToCode(block, 'DO' + n);
code += ' elseif ' + argument + ' then\n' + branch;
}
if (block.elseCount_) {
branch = Blockly.Lua.statementToCode(block, 'ELSE');
code += ' else\n' + branch;
}
return code + 'end\n';
};
Blockly.Lua['logic_compare'] = function(block) {
// Comparison operator.
var OPERATORS = {
'EQ': '==',
'NEQ': '~=',
'LT': '<',
'LTE': '<=',
'GT': '>',
'GTE': '>='
};
var operator = OPERATORS[block.getFieldValue('OP')];
var argument0 = Blockly.Lua.valueToCode(block, 'A',
Blockly.Lua.ORDER_RELATIONAL) || '0';
var argument1 = Blockly.Lua.valueToCode(block, 'B',
Blockly.Lua.ORDER_RELATIONAL) || '0';
var code = argument0 + ' ' + operator + ' ' + argument1;
return [code, Blockly.Lua.ORDER_RELATIONAL];
};
Blockly.Lua['logic_operation'] = function(block) {
// Operations 'and', 'or'.
var operator = (block.getFieldValue('OP') == 'AND') ? 'and' : 'or';
var order = (operator == 'and') ? Blockly.Lua.ORDER_AND :
Blockly.Lua.ORDER_OR;
var argument0 = Blockly.Lua.valueToCode(block, 'A', order);
var argument1 = Blockly.Lua.valueToCode(block, 'B', order);
if (!argument0 && !argument1) {
// If there are no arguments, then the return value is false.
argument0 = 'false';
argument1 = 'false';
} else {
// Single missing arguments have no effect on the return value.
var defaultArgument = (operator == 'and') ? 'true' : 'false';
if (!argument0) {
argument0 = defaultArgument;
}
if (!argument1) {
argument1 = defaultArgument;
}
}
var code = argument0 + ' ' + operator + ' ' + argument1;
return [code, order];
};
Blockly.Lua['logic_negate'] = function(block) {
// Negation.
var argument0 = Blockly.Lua.valueToCode(block, 'BOOL',
Blockly.Lua.ORDER_UNARY) || 'true';
var code = 'not ' + argument0;
return [code, Blockly.Lua.ORDER_UNARY];
};
Blockly.Lua['logic_boolean'] = function(block) {
// Boolean values true and false.
var code = (block.getFieldValue('BOOL') == 'TRUE') ? 'true' : 'false';
return [code, Blockly.Lua.ORDER_ATOMIC];
};
Blockly.Lua['logic_null'] = function(block) {
// Null data type.
return ['nil', Blockly.Lua.ORDER_ATOMIC];
};
Blockly.Lua['logic_ternary'] = function(block) {
// Ternary operator.
var value_if = Blockly.Lua.valueToCode(block, 'IF',
Blockly.Lua.ORDER_AND) || 'false';
var value_then = Blockly.Lua.valueToCode(block, 'THEN',
Blockly.Lua.ORDER_AND) || 'nil';
var value_else = Blockly.Lua.valueToCode(block, 'ELSE',
Blockly.Lua.ORDER_OR) || 'nil';
var code = value_if + ' and ' + value_then + ' or ' + value_else;
return [code, Blockly.Lua.ORDER_OR];
};

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/**
* @license
* Visual Blocks Language
*
* Copyright 2016 Google Inc.
* https://developers.google.com/blockly/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Generating Lua for loop blocks.
* @author rodrigoq@google.com (Rodrigo Queiro)
*/
'use strict';
goog.provide('Blockly.Lua.loops');
goog.require('Blockly.Lua');
/**
* This is the text used to implement a <pre>continue</pre>.
* It is also used to recognise <pre>continue</pre>s in generated code so that
* the appropriate label can be put at the end of the loop body.
* @const {string}
*/
Blockly.Lua.CONTINUE_STATEMENT = 'goto continue\n';
/**
* If the loop body contains a "goto continue" statement, add a continue label
* to the loop body. Slightly inefficient, as continue labels will be generated
* in all outer loops, but this is safer than duplicating the logic of
* blockToCode.
*
* @param {string} branch Generated code of the loop body
* @return {string} Generated label or '' if unnecessary
*/
Blockly.Lua.addContinueLabel = function(branch) {
if (branch.indexOf(Blockly.Lua.CONTINUE_STATEMENT) > -1) {
return branch + Blockly.Lua.INDENT + '::continue::\n';
} else {
return branch;
}
};
Blockly.Lua['controls_repeat'] = function(block) {
// Repeat n times (internal number).
var repeats = parseInt(block.getFieldValue('TIMES'), 10);
var branch = Blockly.Lua.statementToCode(block, 'DO') || '';
branch = Blockly.Lua.addContinueLabel(branch);
var loopVar = Blockly.Lua.variableDB_.getDistinctName(
'count', Blockly.Variables.NAME_TYPE);
var code = 'for ' + loopVar + ' = 1, ' + repeats + ' do\n' + branch + 'end\n';
return code;
};
Blockly.Lua['controls_repeat_ext'] = function(block) {
// Repeat n times (external number).
var repeats = Blockly.Lua.valueToCode(block, 'TIMES',
Blockly.Lua.ORDER_NONE) || '0';
if (Blockly.isNumber(repeats)) {
repeats = parseInt(repeats, 10);
} else {
repeats = 'math.floor(' + repeats + ')';
}
var branch = Blockly.Lua.statementToCode(block, 'DO') || '\n';
branch = Blockly.Lua.addContinueLabel(branch);
var loopVar = Blockly.Lua.variableDB_.getDistinctName(
'count', Blockly.Variables.NAME_TYPE);
var code = 'for ' + loopVar + ' = 1, ' + repeats + ' do\n' +
branch + 'end\n';
return code;
};
Blockly.Lua['controls_whileUntil'] = function(block) {
// Do while/until loop.
var until = block.getFieldValue('MODE') == 'UNTIL';
var argument0 = Blockly.Lua.valueToCode(block, 'BOOL',
until ? Blockly.Lua.ORDER_UNARY :
Blockly.Lua.ORDER_NONE) || 'false';
var branch = Blockly.Lua.statementToCode(block, 'DO') || '\n';
branch = Blockly.Lua.addLoopTrap(branch, block.id);
branch = Blockly.Lua.addContinueLabel(branch);
if (until) {
argument0 = 'not ' + argument0;
}
return 'while ' + argument0 + ' do\n' + branch + 'end\n';
};
Blockly.Lua['controls_for'] = function(block) {
// For loop.
var variable0 = Blockly.Lua.variableDB_.getName(
block.getFieldValue('VAR'), Blockly.Variables.NAME_TYPE);
var startVar = Blockly.Lua.valueToCode(block, 'FROM',
Blockly.Lua.ORDER_NONE) || '0';
var endVar = Blockly.Lua.valueToCode(block, 'TO',
Blockly.Lua.ORDER_NONE) || '0';
var increment = Blockly.Lua.valueToCode(block, 'BY',
Blockly.Lua.ORDER_NONE) || '1';
var branch = Blockly.Lua.statementToCode(block, 'DO') || '\n';
branch = Blockly.Lua.addLoopTrap(branch, block.id);
branch = Blockly.Lua.addContinueLabel(branch);
var code = '';
var incValue;
if (Blockly.isNumber(startVar) && Blockly.isNumber(endVar) &&
Blockly.isNumber(increment)) {
// All arguments are simple numbers.
var up = parseFloat(startVar) <= parseFloat(endVar);
var step = Math.abs(parseFloat(increment));
incValue = (up ? '' : '-') + step;
} else {
code = '';
// Determine loop direction at start, in case one of the bounds
// changes during loop execution.
incValue = Blockly.Lua.variableDB_.getDistinctName(
variable0 + '_inc', Blockly.Variables.NAME_TYPE);
code += incValue + ' = ';
if (Blockly.isNumber(increment)) {
code += Math.abs(increment) + '\n';
} else {
code += 'math.abs(' + increment + ')\n';
}
code += 'if (' + startVar + ') > (' + endVar + ') then\n';
code += Blockly.Lua.INDENT + incValue + ' = -' + incValue + '\n';
code += 'end\n';
}
code += 'for ' + variable0 + ' = ' + startVar + ', ' + endVar +
', ' + incValue;
code += ' do\n' + branch + 'end\n';
return code;
};
Blockly.Lua['controls_forEach'] = function(block) {
// For each loop.
var variable0 = Blockly.Lua.variableDB_.getName(
block.getFieldValue('VAR'), Blockly.Variables.NAME_TYPE);
var argument0 = Blockly.Lua.valueToCode(block, 'LIST',
Blockly.Lua.ORDER_NONE) || '{}';
var branch = Blockly.Lua.statementToCode(block, 'DO') || '\n';
branch = Blockly.Lua.addContinueLabel(branch);
var code = 'for _, ' + variable0 + ' in ipairs(' + argument0 + ') do \n' +
branch + 'end\n';
return code;
};
Blockly.Lua['controls_flow_statements'] = function(block) {
// Flow statements: continue, break.
switch (block.getFieldValue('FLOW')) {
case 'BREAK':
return 'break\n';
case 'CONTINUE':
return Blockly.Lua.CONTINUE_STATEMENT;
}
throw 'Unknown flow statement.';
};

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/**
* @license
* Visual Blocks Language
*
* Copyright 2016 Google Inc.
* https://developers.google.com/blockly/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Generating Lua for math blocks.
* @author rodrigoq@google.com (Rodrigo Queiro)
*/
'use strict';
goog.provide('Blockly.Lua.math');
goog.require('Blockly.Lua');
Blockly.Lua['math_number'] = function(block) {
// Numeric value.
var code = parseFloat(block.getFieldValue('NUM'));
var order = code < 0 ? Blockly.Lua.ORDER_UNARY :
Blockly.Lua.ORDER_ATOMIC;
return [code, order];
};
Blockly.Lua['math_arithmetic'] = function(block) {
// Basic arithmetic operators, and power.
var OPERATORS = {
ADD: [' + ', Blockly.Lua.ORDER_ADDITIVE],
MINUS: [' - ', Blockly.Lua.ORDER_ADDITIVE],
MULTIPLY: [' * ', Blockly.Lua.ORDER_MULTIPLICATIVE],
DIVIDE: [' / ', Blockly.Lua.ORDER_MULTIPLICATIVE],
POWER: [' ^ ', Blockly.Lua.ORDER_EXPONENTIATION]
};
var tuple = OPERATORS[block.getFieldValue('OP')];
var operator = tuple[0];
var order = tuple[1];
var argument0 = Blockly.Lua.valueToCode(block, 'A', order) || '0';
var argument1 = Blockly.Lua.valueToCode(block, 'B', order) || '0';
var code = argument0 + operator + argument1;
return [code, order];
};
Blockly.Lua['math_single'] = function(block) {
// Math operators with single operand.
var operator = block.getFieldValue('OP');
var code;
var arg;
if (operator == 'NEG') {
// Negation is a special case given its different operator precedence.
arg = Blockly.Lua.valueToCode(block, 'NUM',
Blockly.Lua.ORDER_UNARY) || '0';
return ['-' + arg, Blockly.Lua.ORDER_UNARY];
}
if (operator == 'SIN' || operator == 'COS' || operator == 'TAN') {
arg = Blockly.Lua.valueToCode(block, 'NUM',
Blockly.Lua.ORDER_MULTIPLICATIVE) || '0';
} else {
arg = Blockly.Lua.valueToCode(block, 'NUM',
Blockly.Lua.ORDER_NONE) || '0';
}
switch (operator) {
case 'ABS':
code = 'math.abs(' + arg + ')';
break;
case 'ROOT':
code = 'math.sqrt(' + arg + ')';
break;
case 'LN':
code = 'math.log(' + arg + ')';
break;
case 'LOG10':
code = 'math.log10(' + arg + ')';
break;
case 'EXP':
code = 'math.exp(' + arg + ')';
break;
case 'POW10':
code = 'math.pow(10,' + arg + ')';
break;
case 'ROUND':
// This rounds up. Blockly does not specify rounding direction.
code = 'math.floor(' + arg + ' + .5)';
break;
case 'ROUNDUP':
code = 'math.ceil(' + arg + ')';
break;
case 'ROUNDDOWN':
code = 'math.floor(' + arg + ')';
break;
case 'SIN':
code = 'math.sin(math.rad(' + arg + '))';
break;
case 'COS':
code = 'math.cos(math.rad(' + arg + '))';
break;
case 'TAN':
code = 'math.tan(math.rad(' + arg + '))';
break;
case 'ASIN':
code = 'math.deg(math.asin(' + arg + '))';
break;
case 'ACOS':
code = 'math.deg(math.acos(' + arg + '))';
break;
case 'ATAN':
code = 'math.deg(math.atan(' + arg + '))';
break;
default:
throw 'Unknown math operator: ' + operator;
}
return [code, Blockly.Lua.ORDER_HIGH];
};
Blockly.Lua['math_constant'] = function(block) {
// Constants: PI, E, the Golden Ratio, sqrt(2), 1/sqrt(2), INFINITY.
var CONSTANTS = {
PI: ['math.pi', Blockly.Lua.ORDER_HIGH],
E: ['math.exp(1)', Blockly.Lua.ORDER_HIGH],
GOLDEN_RATIO: ['(1 + math.sqrt(5)) / 2', Blockly.Lua.ORDER_MULTIPLICATIVE],
SQRT2: ['math.sqrt(2)', Blockly.Lua.ORDER_HIGH],
SQRT1_2: ['math.sqrt(1 / 2)', Blockly.Lua.ORDER_HIGH],
INFINITY: ['math.huge', Blockly.Lua.ORDER_HIGH]
};
return CONSTANTS[block.getFieldValue('CONSTANT')];
};
Blockly.Lua['math_number_property'] = function(block) {
// Check if a number is even, odd, prime, whole, positive, or negative
// or if it is divisible by certain number. Returns true or false.
var number_to_check = Blockly.Lua.valueToCode(block, 'NUMBER_TO_CHECK',
Blockly.Lua.ORDER_MULTIPLICATIVE) || '0';
var dropdown_property = block.getFieldValue('PROPERTY');
var code;
if (dropdown_property == 'PRIME') {
// Prime is a special case as it is not a one-liner test.
var functionName = Blockly.Lua.provideFunction_(
'math_isPrime',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(n)',
' -- https://en.wikipedia.org/wiki/Primality_test#Naive_methods',
' if n == 2 or n == 3 then',
' return true',
' end',
' -- False if n is NaN, negative, is 1, or not whole.',
' -- And false if n is divisible by 2 or 3.',
' if not(n > 1) or n % 1 ~= 0 or n % 2 == 0 or n % 3 == 0 then',
' return false',
' end',
' -- Check all the numbers of form 6k +/- 1, up to sqrt(n).',
' for x = 6, math.sqrt(n) + 1.5, 6 do',
' if n % (x - 1) == 0 or n % (x + 1) == 0 then',
' return false',
' end',
' end',
' return true',
'end']);
code = functionName + '(' + number_to_check + ')';
return [code, Blockly.Lua.ORDER_HIGH];
}
switch (dropdown_property) {
case 'EVEN':
code = number_to_check + ' % 2 == 0';
break;
case 'ODD':
code = number_to_check + ' % 2 == 1';
break;
case 'WHOLE':
code = number_to_check + ' % 1 == 0';
break;
case 'POSITIVE':
code = number_to_check + ' > 0';
break;
case 'NEGATIVE':
code = number_to_check + ' < 0';
break;
case 'DIVISIBLE_BY':
var divisor = Blockly.Lua.valueToCode(block, 'DIVISOR',
Blockly.Lua.ORDER_MULTIPLICATIVE);
// If 'divisor' is some code that evals to 0, Lua will produce a nan.
// Let's produce nil if we can determine this at compile-time.
if (!divisor || divisor == '0') {
return ['nil', Blockly.Lua.ORDER_ATOMIC];
}
// The normal trick to implement ?: with and/or doesn't work here:
// divisor == 0 and nil or number_to_check % divisor == 0
// because nil is false, so allow a runtime failure. :-(
code = number_to_check + ' % ' + divisor + ' == 0';
break;
}
return [code, Blockly.Lua.ORDER_RELATIONAL];
};
Blockly.Lua['math_change'] = function(block) {
// Add to a variable in place.
var argument0 = Blockly.Lua.valueToCode(block, 'DELTA',
Blockly.Lua.ORDER_ADDITIVE) || '0';
var varName = Blockly.Lua.variableDB_.getName(
block.getFieldValue('VAR'), Blockly.Variables.NAME_TYPE);
return varName + ' = ' + varName + ' + ' + argument0 + '\n';
};
// Rounding functions have a single operand.
Blockly.Lua['math_round'] = Blockly.Lua['math_single'];
// Trigonometry functions have a single operand.
Blockly.Lua['math_trig'] = Blockly.Lua['math_single'];
Blockly.Lua['math_on_list'] = function(block) {
// Math functions for lists.
var func = block.getFieldValue('OP');
var list = Blockly.Lua.valueToCode(block, 'LIST',
Blockly.Lua.ORDER_NONE) || '{}';
var functionName;
// Functions needed in more than one case.
function provideSum() {
return Blockly.Lua.provideFunction_(
'math_sum',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(t)',
' local result = 0',
' for _, v in ipairs(t) do',
' result = result + v',
' end',
' return result',
'end']);
}
switch (func) {
case 'SUM':
functionName = provideSum();
break;
case 'MIN':
// Returns 0 for the empty list.
functionName = Blockly.Lua.provideFunction_(
'math_min',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(t)',
' if #t == 0 then',
' return 0',
' end',
' local result = math.huge',
' for _, v in ipairs(t) do',
' if v < result then',
' result = v',
' end',
' end',
' return result',
'end']);
break;
case 'AVERAGE':
// Returns 0 for the empty list.
functionName = Blockly.Lua.provideFunction_(
'math_average',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(t)',
' if #t == 0 then',
' return 0',
' end',
' return ' + provideSum() + '(t) / #t',
'end']);
break;
case 'MAX':
// Returns 0 for the empty list.
functionName = Blockly.Lua.provideFunction_(
'math_max',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(t)',
' if #t == 0 then',
' return 0',
' end',
' local result = -math.huge',
' for _, v in ipairs(t) do',
' if v > result then',
' result = v',
' end',
' end',
' return result',
'end']);
break;
case 'MEDIAN':
functionName = Blockly.Lua.provideFunction_(
'math_median',
// This operation excludes non-numbers.
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(t)',
' -- Source: http://lua-users.org/wiki/SimpleStats',
' if #t == 0 then',
' return 0',
' end',
' local temp={}',
' for _, v in ipairs(t) do',
' if type(v) == "number" then',
' table.insert(temp, v)',
' end',
' end',
' table.sort(temp)',
' if #temp % 2 == 0 then',
' return (temp[#temp/2] + temp[(#temp/2)+1]) / 2',
' else',
' return temp[math.ceil(#temp/2)]',
' end',
'end']);
break;
case 'MODE':
functionName = Blockly.Lua.provideFunction_(
'math_modes',
// As a list of numbers can contain more than one mode,
// the returned result is provided as an array.
// The Lua version includes non-numbers.
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(t)',
' -- Source: http://lua-users.org/wiki/SimpleStats',
' local counts={}',
' for _, v in ipairs(t) do',
' if counts[v] == nil then',
' counts[v] = 1',
' else',
' counts[v] = counts[v] + 1',
' end',
' end',
' local biggestCount = 0',
' for _, v in pairs(counts) do',
' if v > biggestCount then',
' biggestCount = v',
' end',
' end',
' local temp={}',
' for k, v in pairs(counts) do',
' if v == biggestCount then',
' table.insert(temp, k)',
' end',
' end',
' return temp',
'end']);
break;
case 'STD_DEV':
functionName = Blockly.Lua.provideFunction_(
'math_standard_deviation',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(t)',
' local m',
' local vm',
' local total = 0',
' local count = 0',
' local result',
' m = #t == 0 and 0 or ' + provideSum() + '(t) / #t',
' for _, v in ipairs(t) do',
" if type(v) == 'number' then",
' vm = v - m',
' total = total + (vm * vm)',
' count = count + 1',
' end',
' end',
' result = math.sqrt(total / (count-1))',
' return result',
'end']);
break;
case 'RANDOM':
functionName = Blockly.Lua.provideFunction_(
'math_random_list',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(t)',
' if #t == 0 then',
' return nil',
' end',
' return t[math.random(#t)]',
'end']);
break;
default:
throw 'Unknown operator: ' + func;
}
return [functionName + '(' + list + ')', Blockly.Lua.ORDER_HIGH];
};
Blockly.Lua['math_modulo'] = function(block) {
// Remainder computation.
var argument0 = Blockly.Lua.valueToCode(block, 'DIVIDEND',
Blockly.Lua.ORDER_MULTIPLICATIVE) || '0';
var argument1 = Blockly.Lua.valueToCode(block, 'DIVISOR',
Blockly.Lua.ORDER_MULTIPLICATIVE) || '0';
var code = argument0 + ' % ' + argument1;
return [code, Blockly.Lua.ORDER_MULTIPLICATIVE];
};
Blockly.Lua['math_constrain'] = function(block) {
// Constrain a number between two limits.
var argument0 = Blockly.Lua.valueToCode(block, 'VALUE',
Blockly.Lua.ORDER_NONE) || '0';
var argument1 = Blockly.Lua.valueToCode(block, 'LOW',
Blockly.Lua.ORDER_NONE) || '-math.huge';
var argument2 = Blockly.Lua.valueToCode(block, 'HIGH',
Blockly.Lua.ORDER_NONE) || 'math.huge';
var code = 'math.min(math.max(' + argument0 + ', ' + argument1 + '), ' +
argument2 + ')';
return [code, Blockly.Lua.ORDER_HIGH];
};
Blockly.Lua['math_random_int'] = function(block) {
// Random integer between [X] and [Y].
var argument0 = Blockly.Lua.valueToCode(block, 'FROM',
Blockly.Lua.ORDER_NONE) || '0';
var argument1 = Blockly.Lua.valueToCode(block, 'TO',
Blockly.Lua.ORDER_NONE) || '0';
var code = 'math.random(' + argument0 + ', ' + argument1 + ')';
return [code, Blockly.Lua.ORDER_HIGH];
};
Blockly.Lua['math_random_float'] = function(block) {
// Random fraction between 0 and 1.
return ['math.random()', Blockly.Lua.ORDER_HIGH];
};

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/**
* @license
* Visual Blocks Language
*
* Copyright 2016 Google Inc.
* https://developers.google.com/blockly/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Generating Lua for procedure blocks.
* @author rodrigoq@google.com (Rodrigo Queiro)
*/
'use strict';
goog.provide('Blockly.Lua.procedures');
goog.require('Blockly.Lua');
Blockly.Lua['procedures_defreturn'] = function(block) {
// Define a procedure with a return value.
var funcName = Blockly.Lua.variableDB_.getName(
block.getFieldValue('NAME'), Blockly.Procedures.NAME_TYPE);
var branch = Blockly.Lua.statementToCode(block, 'STACK');
if (Blockly.Lua.STATEMENT_PREFIX) {
branch = Blockly.Lua.prefixLines(
Blockly.Lua.STATEMENT_PREFIX.replace(/%1/g,
'\'' + block.id + '\''), Blockly.Lua.INDENT) + branch;
}
if (Blockly.Lua.INFINITE_LOOP_TRAP) {
branch = Blockly.Lua.INFINITE_LOOP_TRAP.replace(/%1/g,
'\'' + block.id + '\'') + branch;
}
var returnValue = Blockly.Lua.valueToCode(block, 'RETURN',
Blockly.Lua.ORDER_NONE) || '';
if (returnValue) {
returnValue = ' return ' + returnValue + '\n';
} else if (!branch) {
branch = '';
}
var args = [];
for (var x = 0; x < block.arguments_.length; x++) {
args[x] = Blockly.Lua.variableDB_.getName(block.arguments_[x],
Blockly.Variables.NAME_TYPE);
}
var code = 'function ' + funcName + '(' + args.join(', ') + ')\n' +
branch + returnValue + 'end\n';
code = Blockly.Lua.scrub_(block, code);
Blockly.Lua.definitions_[funcName] = code;
return null;
};
// Defining a procedure without a return value uses the same generator as
// a procedure with a return value.
Blockly.Lua['procedures_defnoreturn'] =
Blockly.Lua['procedures_defreturn'];
Blockly.Lua['procedures_callreturn'] = function(block) {
// Call a procedure with a return value.
var funcName = Blockly.Lua.variableDB_.getName(
block.getFieldValue('NAME'), Blockly.Procedures.NAME_TYPE);
var args = [];
for (var x = 0; x < block.arguments_.length; x++) {
args[x] = Blockly.Lua.valueToCode(block, 'ARG' + x,
Blockly.Lua.ORDER_NONE) || 'nil';
}
var code = funcName + '(' + args.join(', ') + ')';
return [code, Blockly.Lua.ORDER_HIGH];
};
Blockly.Lua['procedures_callnoreturn'] = function(block) {
// Call a procedure with no return value.
var funcName = Blockly.Lua.variableDB_.getName(
block.getFieldValue('NAME'), Blockly.Procedures.NAME_TYPE);
var args = [];
for (var x = 0; x < block.arguments_.length; x++) {
args[x] = Blockly.Lua.valueToCode(block, 'ARG' + x,
Blockly.Lua.ORDER_NONE) || 'nil';
}
var code = funcName + '(' + args.join(', ') + ')\n';
return code;
};
Blockly.Lua['procedures_ifreturn'] = function(block) {
// Conditionally return value from a procedure.
var condition = Blockly.Lua.valueToCode(block, 'CONDITION',
Blockly.Lua.ORDER_NONE) || 'false';
var code = 'if ' + condition + ' then\n';
if (block.hasReturnValue_) {
var value = Blockly.Lua.valueToCode(block, 'VALUE',
Blockly.Lua.ORDER_NONE) || 'nil';
code += ' return ' + value + '\n';
} else {
code += ' return\n';
}
code += 'end\n';
return code;
};

293
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@@ -0,0 +1,293 @@
/**
* @license
* Visual Blocks Language
*
* Copyright 2016 Google Inc.
* https://developers.google.com/blockly/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Generating Lua for text blocks.
* @author rodrigoq@google.com (Rodrigo Queiro)
*/
'use strict';
goog.provide('Blockly.Lua.texts');
goog.require('Blockly.Lua');
Blockly.Lua['text'] = function(block) {
// Text value.
var code = Blockly.Lua.quote_(block.getFieldValue('TEXT'));
return [code, Blockly.Lua.ORDER_ATOMIC];
};
Blockly.Lua['text_join'] = function(block) {
// Create a string made up of any number of elements of any type.
if (block.itemCount_ == 0) {
return ['\'\'', Blockly.Lua.ORDER_ATOMIC];
} else if (block.itemCount_ == 1) {
var argument0 = Blockly.Lua.valueToCode(block, 'ADD0',
Blockly.Lua.ORDER_NONE) || '\'\'';
var code = argument0;
return [code, Blockly.Lua.ORDER_HIGH];
} else if (block.itemCount_ == 2) {
var argument0 = Blockly.Lua.valueToCode(block, 'ADD0',
Blockly.Lua.ORDER_NONE) || '\'\'';
var argument1 = Blockly.Lua.valueToCode(block, 'ADD1',
Blockly.Lua.ORDER_NONE) || '\'\'';
var code = argument0 + ' .. ' + argument1;
return [code, Blockly.Lua.ORDER_UNARY];
} else {
var code = [];
for (var n = 0; n < block.itemCount_; n++) {
code[n] = Blockly.Lua.valueToCode(block, 'ADD' + n,
Blockly.Lua.ORDER_NONE) || '\'\'';
}
code = 'table.concat({' + code.join(', ') + '})';
return [code, Blockly.Lua.ORDER_HIGH];
}
};
Blockly.Lua['text_append'] = function(block) {
// Append to a variable in place.
var varName = Blockly.Lua.variableDB_.getName(
block.getFieldValue('VAR'), Blockly.Variables.NAME_TYPE);
var argument0 = Blockly.Lua.valueToCode(block, 'TEXT',
Blockly.Lua.ORDER_NONE) || '\'\'';
return varName + ' = ' + varName + ' .. ' + argument0 + '\n';
};
Blockly.Lua['text_length'] = function(block) {
// String or array length.
var argument0 = Blockly.Lua.valueToCode(block, 'VALUE',
Blockly.Lua.ORDER_HIGH) || '\'\'';
return ['#' + argument0, Blockly.Lua.ORDER_HIGH];
};
Blockly.Lua['text_isEmpty'] = function(block) {
// Is the string null or array empty?
var argument0 = Blockly.Lua.valueToCode(block, 'VALUE',
Blockly.Lua.ORDER_HIGH) || '\'\'';
return ['#' + argument0 + ' == 0', Blockly.Lua.ORDER_RELATIONAL];
};
Blockly.Lua['text_indexOf'] = function(block) {
// Search the text for a substring.
var operator = block.getFieldValue('END') == 'FIRST' ?
'indexOf' : 'lastIndexOf';
var substr = Blockly.Lua.valueToCode(block, 'FIND',
Blockly.Lua.ORDER_NONE) || '\'\'';
var str = Blockly.Lua.valueToCode(block, 'VALUE',
Blockly.Lua.ORDER_NONE) || '\'\'';
if (block.getTitleValue('END') == 'FIRST') {
var functionName = Blockly.Lua.provideFunction_(
'firstIndexOf',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ +
'(str, substr) ',
' local i = string.find(str, substr, 1, true)',
' if i == nil then',
' return 0',
' else',
' return i',
' end',
'end']);
} else {
var functionName = Blockly.Lua.provideFunction_(
'lastIndexOf',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ +
'(str, substr)',
' local i = string.find(string.reverse(str), ' +
'string.reverse(substr), 1, true)',
' if i then',
' return #str + 2 - i - #substr',
' end',
' return 0',
'end']);
}
var code = functionName + '(' + str + ', ' + substr + ')';
return [code, Blockly.Lua.ORDER_HIGH];
};
Blockly.Lua['text_charAt'] = function(block) {
// Get letter at index.
// Note: Until January 2013 this block did not have the WHERE input.
var where = block.getFieldValue('WHERE') || 'FROM_START';
var at = Blockly.Lua.valueToCode(block, 'AT',
Blockly.Lua.ORDER_UNARY) || '1';
var text = Blockly.Lua.valueToCode(block, 'VALUE',
Blockly.Lua.ORDER_NONE) || '\'\'';
var code;
if (where == 'RANDOM') {
var functionName = Blockly.Lua.provideFunction_(
'text_random_letter',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(str)',
' local index = math.random(string.len(str))',
' return string.sub(str, index, index)',
'end']);
code = functionName + '(' + text + ')';
} else {
if (where == 'FIRST') {
var start = '1';
} else if (where == 'LAST') {
var start = '-1';
} else {
if (where == 'FROM_START') {
var start = at;
} else if (where == 'FROM_END') {
var start = '-' + at;
} else {
throw 'Unhandled option (text_charAt).';
}
}
if (start.match(/^-?\w*$/)) {
code = 'string.sub(' + text + ', ' + start + ', ' + start + ')';
} else {
// use function to avoid reevaluation
var functionName = Blockly.Lua.provideFunction_(
'text_char_at',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ +
'(str, index)',
' return string.sub(str, index, index)',
'end']);
code = functionName + '(' + text + ', ' + start + ')';
}
}
return [code, Blockly.Lua.ORDER_HIGH];
};
Blockly.Lua['text_getSubstring'] = function(block) {
// Get substring.
var text = Blockly.Lua.valueToCode(block, 'STRING',
Blockly.Lua.ORDER_NONE) || '\'\'';
// Get start index.
var where1 = block.getFieldValue('WHERE1');
var at1 = Blockly.Lua.valueToCode(block, 'AT1',
Blockly.Lua.ORDER_UNARY) || '1';
if (where1 == 'FIRST') {
var start = 1;
} else if (where1 == 'FROM_START') {
var start = at1;
} else if (where1 == 'FROM_END') {
var start = '-' + at1;
} else {
throw 'Unhandled option (text_getSubstring)';
}
// Get end index.
var where2 = block.getFieldValue('WHERE2');
var at2 = Blockly.Lua.valueToCode(block, 'AT2',
Blockly.Lua.ORDER_UNARY) || '1';
if (where2 == 'LAST') {
var end = -1;
} else if (where2 == 'FROM_START') {
var end = at2;
} else if (where2 == 'FROM_END') {
var end = '-' + at2;
} else {
throw 'Unhandled option (text_getSubstring)';
}
var code = 'string.sub(' + text + ', ' + start + ', ' + end + ')';
return [code, Blockly.Lua.ORDER_HIGH];
};
Blockly.Lua['text_changeCase'] = function(block) {
// Change capitalization.
var operator = block.getFieldValue('CASE');
var argument0 = Blockly.Lua.valueToCode(block, 'TEXT',
Blockly.Lua.ORDER_NONE) || '\'\'';
if (operator == 'UPPERCASE') {
var functionName = 'string.upper';
} else if (operator == 'LOWERCASE') {
var functionName = 'string.lower';
} else if (operator == 'TITLECASE') {
var functionName = Blockly.Lua.provideFunction_(
'text_titlecase',
// There are shorter versions at
// http://lua-users.org/wiki/SciteTitleCase
// that do not preserve whitespace.
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(str)',
' local buf = {}',
' local inWord = false',
' for i = 1, #str do',
' local c = string.sub(str, i, i)',
' if inWord then',
' table.insert(buf, string.lower(c))',
' if string.find(c, "%s") then',
' inWord = false',
' end',
' else',
' table.insert(buf, string.upper(c))',
' inWord = true',
' end',
' end',
' return table.concat(buf)',
'end']);
}
var code = functionName + '(' + argument0 + ')';
return [code, Blockly.Lua.ORDER_HIGH];
};
Blockly.Lua['text_trim'] = function(block) {
// Trim spaces.
var OPERATORS = {
LEFT: '^%s*(,-)',
RIGHT: '(.-)%s*$',
BOTH: '^%s*(.-)%s*$'
};
var operator = OPERATORS[block.getFieldValue('MODE')];
var text = Blockly.Lua.valueToCode(block, 'TEXT',
Blockly.Lua.ORDER_NONE) || '\'\'';
var code = 'string.gsub(' + text + ', "' + operator + '", "%1")';
return [code, Blockly.Lua.ORDER_HIGH];
};
Blockly.Lua['text_print'] = function(block) {
// Print statement.
var argument0 = Blockly.Lua.valueToCode(block, 'TEXT',
Blockly.Lua.ORDER_NONE) || '\'\'';
return 'print(' + argument0 + ')\n';
};
Blockly.Lua['text_prompt_ext'] = function(block) {
// Prompt function.
if (block.getField('TEXT')) {
// Internal message.
var msg = Blockly.Lua.quote_(block.getFieldValue('TEXT'));
} else {
// External message.
var msg = Blockly.Lua.valueToCode(block, 'TEXT',
Blockly.Lua.ORDER_NONE) || '\'\'';
}
var functionName = Blockly.Lua.provideFunction_(
'text_prompt',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(msg)',
' io.write(msg)',
' io.flush()',
' return io.read()',
'end']);
var code = functionName + '(' + msg + ')';
var toNumber = block.getFieldValue('TYPE') == 'NUMBER';
if (toNumber) {
code = 'tonumber(' + code + ', 10)';
}
return [code, Blockly.Lua.ORDER_HIGH];
};
Blockly.Lua['text_prompt'] = Blockly.Lua['text_prompt_ext'];

46
generators/lua/variables.js Normal file
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@@ -0,0 +1,46 @@
/**
* @license
* Visual Blocks Language
*
* Copyright 2016 Google Inc.
* https://developers.google.com/blockly/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Generating Lua for variable blocks.
* @author rodrigoq@google.com (Rodrigo Queiro)
*/
'use strict';
goog.provide('Blockly.Lua.variables');
goog.require('Blockly.Lua');
Blockly.Lua['variables_get'] = function(block) {
// Variable getter.
var code = Blockly.Lua.variableDB_.getName(block.getFieldValue('VAR'),
Blockly.Variables.NAME_TYPE);
return [code, Blockly.Lua.ORDER_ATOMIC];
};
Blockly.Lua['variables_set'] = function(block) {
// Variable setter.
var argument0 = Blockly.Lua.valueToCode(block, 'VALUE',
Blockly.Lua.ORDER_NONE) || '0';
var varName = Blockly.Lua.variableDB_.getName(
block.getFieldValue('VAR'), Blockly.Variables.NAME_TYPE);
return varName + ' = ' + argument0 + '\n';
};

74
lua_compressed.js Normal file
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File diff suppressed because one or more lines are too long

18
tests/generators/index.html
View File

@@ -49,6 +49,18 @@
<script src="../../generators/dart/variables.js"></script> <script src="../../generators/dart/variables.js"></script>
<script src="../../generators/dart/procedures.js"></script> <script src="../../generators/dart/procedures.js"></script>
<script src="../../generators/lua.js"></script>
<script src="unittest_lua.js"></script>
<script src="../../generators/lua/logic.js"></script>
<script src="../../generators/lua/loops.js"></script>
<script src="../../generators/lua/math.js"></script>
<script src="../../generators/lua/text.js"></script>
<script src="../../generators/lua/lists.js"></script>
<script src="../../generators/lua/colour.js"></script>
<script src="../../generators/lua/variables.js"></script>
<script src="../../generators/lua/procedures.js"></script>
<script src="unittest.js"></script> <script src="unittest.js"></script>
<script src="../../msg/messages.js"></script> <script src="../../msg/messages.js"></script>
<script src="../../blocks/logic.js"></script> <script src="../../blocks/logic.js"></script>
@@ -153,6 +165,11 @@ function toDart() {
var code = Blockly.Dart.workspaceToCode(workspace); var code = Blockly.Dart.workspaceToCode(workspace);
setOutput(code); setOutput(code);
} }
function toLua() {
var code = Blockly.Lua.workspaceToCode(workspace);
setOutput(code);
}
</script> </script>
<style> <style>
@@ -287,6 +304,7 @@ h1 {
<input type="button" value="Python" onclick="toPython()"> <input type="button" value="Python" onclick="toPython()">
<input type="button" value="PHP" onclick="toPhp()"> <input type="button" value="PHP" onclick="toPhp()">
<input type="button" value="Dart" onclick="toDart()"> <input type="button" value="Dart" onclick="toDart()">
<input type="button" value="Lua" onclick="toLua()">
</p> </p>
</td></tr><tr><td height="99%"> </td></tr><tr><td height="99%">
<textarea id="importExport" readonly="readonly" wrap="off"></textarea> <textarea id="importExport" readonly="readonly" wrap="off"></textarea>

163
tests/generators/unittest_lua.js Normal file
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@@ -0,0 +1,163 @@
/**
* @license
* Visual Blocks Language
*
* Copyright 2016 Google Inc.
* https://developers.google.com/blockly/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Generating Lua for unit test blocks.
* @author rodrigoq@google.com (Rodrigo Queiro)
*/
'use strict';
Blockly.Lua['unittest_main'] = function(block) {
// Container for unit tests.
var resultsVar = Blockly.Lua.variableDB_.getName('unittestResults',
Blockly.Variables.NAME_TYPE);
var functionName = Blockly.Lua.provideFunction_(
'unittest_report',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '()',
' -- Create test report.',
' local report = {}',
' local summary = {}',
' local fails = 0',
' for _, v in pairs(' + resultsVar + ') do',
' if v["success"] then',
' table.insert(summary, ".")',
' else',
' table.insert(summary, "F")',
' fails = fails + 1',
' table.insert(report, "FAIL: " .. v["title"])',
' table.insert(report, v["log"])',
' end',
' end',
' table.insert(report, 1, table.concat(summary))',
' table.insert(report, "")',
' table.insert(report, "Number of tests run: " .. #' + resultsVar + ')',
' table.insert(report, "")',
' if fails > 0 then',
' table.insert(report, "FAILED (failures=" .. fails .. ")")',
' else',
' table.insert(report, "OK")',
' end',
' return table.concat(report, "\\n")',
'end']);
// Setup global to hold test results.
var code = resultsVar + ' = {}\n';
// Run tests (unindented).
code += Blockly.Lua.statementToCode(block, 'DO')
.replace(/^ /, '').replace(/\n /g, '\n');
var reportVar = Blockly.Lua.variableDB_.getDistinctName(
'report', Blockly.Variables.NAME_TYPE);
code += reportVar + ' = ' + functionName + '()\n';
// Destroy results.
code += resultsVar + ' = nil\n';
// Print the report.
code += 'print(' + reportVar + ')\n';
return code;
};
Blockly.Lua['unittest_main'].defineAssert_ = function(block) {
var resultsVar = Blockly.Lua.variableDB_.getName('unittestResults',
Blockly.Variables.NAME_TYPE);
var functionName = Blockly.Lua.provideFunction_(
'assertEquals',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ +
'(actual, expected, message)',
' -- Asserts that a value equals another value.',
' assert(' + resultsVar + ' ~= nil, ' +
'"Orphaned assert equals: " .. message)',
' if type(actual) == "table" and type(expected) == "table" then',
' local lists_match = #actual == #expected',
' if lists_match then',
' for i, v1 in ipairs(actual) do',
' local v2 = expected[i]',
' if type(v1) == "number" and type(v2) == "number" then',
' if math.abs(v1 - v2) > 1e-9 then',
' lists_match = false',
' end',
' elseif v1 ~= v2 then',
' lists_match = false',
' end',
' end',
' end',
' if lists_match then',
' table.insert(' + resultsVar +
', {success=true, log="OK", title=message})',
' return',
' else',
' -- produce the non-matching strings for a human-readable error',
' expected = "{" .. table.concat(expected, ", ") .. "}"',
' actual = "{" .. table.concat(actual, ", ") .. "}"',
' end',
' end',
' if actual == expected then',
' table.insert(' + resultsVar +
', {success=true, log="OK", title=message})',
' else',
' table.insert(' + resultsVar + ', {success=false, ' +
'log=string.format("Expected: %s\\nActual: %s"' +
', expected, actual), title=message})',
' end',
'end']);
return functionName;
};
Blockly.Lua['unittest_assertequals'] = function(block) {
// Asserts that a value equals another value.
var message = Blockly.Lua.quote_(block.getFieldValue('MESSAGE'));
var actual = Blockly.Lua.valueToCode(block, 'ACTUAL',
Blockly.Lua.ORDER_NONE) || 'nil';
var expected = Blockly.Lua.valueToCode(block, 'EXPECTED',
Blockly.Lua.ORDER_NONE) || 'nil';
return Blockly.Lua['unittest_main'].defineAssert_() +
'(' + actual + ', ' + expected + ', ' + message + ')\n';
};
Blockly.Lua['unittest_assertvalue'] = function(block) {
// Asserts that a value is true, false, or null.
var message = Blockly.Lua.quote_(block.getFieldValue('MESSAGE'));
var actual = Blockly.Lua.valueToCode(block, 'ACTUAL',
Blockly.Lua.ORDER_NONE) || 'nil';
var expected = block.getFieldValue('EXPECTED');
if (expected == 'TRUE') {
expected = 'true';
} else if (expected == 'FALSE') {
expected = 'false';
} else if (expected == 'NULL') {
expected = 'nil';
}
return Blockly.Lua.unittest_main.defineAssert_() +
'(' + actual + ', ' + expected + ', ' + message + ')\n';
};
Blockly.Lua['unittest_fail'] = function(block) {
// Always assert an error.
var resultsVar = Blockly.Lua.variableDB_.getName('unittestResults',
Blockly.Variables.NAME_TYPE);
var message = Blockly.Lua.quote_(block.getFieldValue('MESSAGE'));
var functionName = Blockly.Lua.provideFunction_(
'unittest_fail',
['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(message)',
' -- Always assert an error.',
' assert(' + resultsVar +
' ~= nil, "Orphaned assert fail: " .. message)',
' table.insert(' + resultsVar +
', {success=false, log="Fail.", title=message})',
'end']);
return functionName + '(' + message + ')\n';
};

11
tests/playground.html
View File

@@ -40,6 +40,15 @@
<script src="../generators/dart/colour.js"></script> <script src="../generators/dart/colour.js"></script>
<script src="../generators/dart/variables.js"></script> <script src="../generators/dart/variables.js"></script>
<script src="../generators/dart/procedures.js"></script> <script src="../generators/dart/procedures.js"></script>
<script src="../generators/lua.js"></script>
<script src="../generators/lua/logic.js"></script>
<script src="../generators/lua/loops.js"></script>
<script src="../generators/lua/math.js"></script>
<script src="../generators/lua/text.js"></script>
<script src="../generators/lua/lists.js"></script>
<script src="../generators/lua/colour.js"></script>
<script src="../generators/lua/variables.js"></script>
<script src="../generators/lua/procedures.js"></script>
<script src="../msg/messages.js"></script> <script src="../msg/messages.js"></script>
<script src="../blocks/logic.js"></script> <script src="../blocks/logic.js"></script>
<script src="../blocks/loops.js"></script> <script src="../blocks/loops.js"></script>
@@ -571,6 +580,8 @@ h1 {
<input type="button" value="To PHP" onclick="toCode('PHP')"> <input type="button" value="To PHP" onclick="toCode('PHP')">
&nbsp; &nbsp;
<input type="button" value="To Dart" onclick="toCode('Dart')"> <input type="button" value="To Dart" onclick="toCode('Dart')">
&nbsp;
<input type="button" value="To Lua" onclick="toCode('Lua')">
<br> <br>
<textarea id="importExport" style="width: 26%; height: 12em" <textarea id="importExport" style="width: 26%; height: 12em"
onchange="taChange();" onkeyup="taChange()"></textarea> onchange="taChange();" onkeyup="taChange()"></textarea>