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ellen.spertus
2013-10-30 14:46:03 -07:00
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119
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/**
* Visual Blocks Language
*
* Copyright 2012 Google Inc.
* http://blockly.googlecode.com/
*
* 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 JavaScript for colour blocks.
* @author fraser@google.com (Neil Fraser)
*/
'use strict';
goog.provide('Blockly.JavaScript.colour');
goog.require('Blockly.JavaScript');
Blockly.JavaScript['colour_picker'] = function(block) {
// Colour picker.
var code = '\'' + block.getTitleValue('COLOUR') + '\'';
return [code, Blockly.JavaScript.ORDER_ATOMIC];
};
Blockly.JavaScript['colour_random'] = function(block) {
// Generate a random colour.
if (!Blockly.JavaScript.definitions_['colour_random']) {
var functionName = Blockly.JavaScript.variableDB_.getDistinctName(
'colour_random', Blockly.Generator.NAME_TYPE);
Blockly.JavaScript.colour_random.functionName = functionName;
var func = [];
func.push('function ' + functionName + '() {');
func.push(' var num = Math.floor(Math.random() * Math.pow(2, 24));');
func.push(' return \'#\' + (\'00000\' + num.toString(16)).substr(-6);');
func.push('}');
Blockly.JavaScript.definitions_['colour_random'] = func.join('\n');
}
var code = Blockly.JavaScript.colour_random.functionName + '()';
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
};
Blockly.JavaScript['colour_rgb'] = function(block) {
// Compose a colour from RGB components expressed as percentages.
var red = Blockly.JavaScript.valueToCode(block, 'RED',
Blockly.JavaScript.ORDER_COMMA) || 0;
var green = Blockly.JavaScript.valueToCode(block, 'GREEN',
Blockly.JavaScript.ORDER_COMMA) || 0;
var blue = Blockly.JavaScript.valueToCode(block, 'BLUE',
Blockly.JavaScript.ORDER_COMMA) || 0;
if (!Blockly.JavaScript.definitions_['colour_rgb']) {
var functionName = Blockly.JavaScript.variableDB_.getDistinctName(
'colour_rgb', Blockly.Generator.NAME_TYPE);
Blockly.JavaScript.colour_rgb.functionName = functionName;
var func = [];
func.push('function ' + functionName + '(r, g, b) {');
func.push(' r = Math.max(Math.min(Number(r), 100), 0) * 2.55;');
func.push(' g = Math.max(Math.min(Number(g), 100), 0) * 2.55;');
func.push(' b = Math.max(Math.min(Number(b), 100), 0) * 2.55;');
func.push(' r = (\'0\' + (Math.round(r) || 0).toString(16)).slice(-2);');
func.push(' g = (\'0\' + (Math.round(g) || 0).toString(16)).slice(-2);');
func.push(' b = (\'0\' + (Math.round(b) || 0).toString(16)).slice(-2);');
func.push(' return \'#\' + r + g + b;');
func.push('}');
Blockly.JavaScript.definitions_['colour_rgb'] = func.join('\n');
}
var code = Blockly.JavaScript.colour_rgb.functionName +
'(' + red + ', ' + green + ', ' + blue + ')';
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
};
Blockly.JavaScript['colour_blend'] = function(block) {
// Blend two colours together.
var c1 = Blockly.JavaScript.valueToCode(block, 'COLOUR1',
Blockly.JavaScript.ORDER_COMMA) || '\'#000000\'';
var c2 = Blockly.JavaScript.valueToCode(block, 'COLOUR2',
Blockly.JavaScript.ORDER_COMMA) || '\'#000000\'';
var ratio = Blockly.JavaScript.valueToCode(block, 'RATIO',
Blockly.JavaScript.ORDER_COMMA) || 0.5;
if (!Blockly.JavaScript.definitions_['colour_blend']) {
var functionName = Blockly.JavaScript.variableDB_.getDistinctName(
'colour_blend', Blockly.Generator.NAME_TYPE);
Blockly.JavaScript.colour_blend.functionName = functionName;
var func = [];
func.push('function ' + functionName + '(c1, c2, ratio) {');
func.push(' ratio = Math.max(Math.min(Number(ratio), 1), 0);');
func.push(' var r1 = parseInt(c1.substring(1, 3), 16);');
func.push(' var g1 = parseInt(c1.substring(3, 5), 16);');
func.push(' var b1 = parseInt(c1.substring(5, 7), 16);');
func.push(' var r2 = parseInt(c2.substring(1, 3), 16);');
func.push(' var g2 = parseInt(c2.substring(3, 5), 16);');
func.push(' var b2 = parseInt(c2.substring(5, 7), 16);');
func.push(' var r = Math.round(r1 * (1 - ratio) + r2 * ratio);');
func.push(' var g = Math.round(g1 * (1 - ratio) + g2 * ratio);');
func.push(' var b = Math.round(b1 * (1 - ratio) + b2 * ratio);');
func.push(' r = (\'0\' + (r || 0).toString(16)).slice(-2);');
func.push(' g = (\'0\' + (g || 0).toString(16)).slice(-2);');
func.push(' b = (\'0\' + (b || 0).toString(16)).slice(-2);');
func.push(' return \'#\' + r + g + b;');
func.push('}');
Blockly.JavaScript.definitions_['colour_blend'] = func.join('\n');
}
var code = Blockly.JavaScript.colour_blend.functionName +
'(' + c1 + ', ' + c2 + ', ' + ratio + ')';
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
};

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/**
* Visual Blocks Language
*
* Copyright 2012 Google Inc.
* http://blockly.googlecode.com/
*
* 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 JavaScript for list blocks.
* @author fraser@google.com (Neil Fraser)
*/
'use strict';
goog.provide('Blockly.JavaScript.lists');
goog.require('Blockly.JavaScript');
Blockly.JavaScript['lists_create_empty'] = function(block) {
// Create an empty list.
return ['[]', Blockly.JavaScript.ORDER_ATOMIC];
};
Blockly.JavaScript['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.JavaScript.valueToCode(block, 'ADD' + n,
Blockly.JavaScript.ORDER_COMMA) || 'null';
}
code = '[' + code.join(', ') + ']';
return [code, Blockly.JavaScript.ORDER_ATOMIC];
};
Blockly.JavaScript['lists_repeat'] = function(block) {
// Create a list with one element repeated.
if (!Blockly.JavaScript.definitions_['lists_repeat']) {
// Function copied from Closure's goog.array.repeat.
var functionName = Blockly.JavaScript.variableDB_.getDistinctName(
'lists_repeat', Blockly.Generator.NAME_TYPE);
Blockly.JavaScript.lists_repeat.repeat = functionName;
var func = [];
func.push('function ' + functionName + '(value, n) {');
func.push(' var array = [];');
func.push(' for (var i = 0; i < n; i++) {');
func.push(' array[i] = value;');
func.push(' }');
func.push(' return array;');
func.push('}');
Blockly.JavaScript.definitions_['lists_repeat'] = func.join('\n');
}
var argument0 = Blockly.JavaScript.valueToCode(block, 'ITEM',
Blockly.JavaScript.ORDER_COMMA) || 'null';
var argument1 = Blockly.JavaScript.valueToCode(block, 'NUM',
Blockly.JavaScript.ORDER_COMMA) || '0';
var code = Blockly.JavaScript.lists_repeat.repeat +
'(' + argument0 + ', ' + argument1 + ')';
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
};
Blockly.JavaScript['lists_length'] = function(block) {
// List length.
var argument0 = Blockly.JavaScript.valueToCode(block, 'VALUE',
Blockly.JavaScript.ORDER_FUNCTION_CALL) || '\'\'';
return [argument0 + '.length', Blockly.JavaScript.ORDER_MEMBER];
};
Blockly.JavaScript['lists_isEmpty'] = function(block) {
// Is the list empty?
var argument0 = Blockly.JavaScript.valueToCode(block, 'VALUE',
Blockly.JavaScript.ORDER_MEMBER) || '[]';
return ['!' + argument0 + '.length', Blockly.JavaScript.ORDER_LOGICAL_NOT];
};
Blockly.JavaScript['lists_indexOf'] = function(block) {
// Find an item in the list.
var operator = block.getTitleValue('END') == 'FIRST' ?
'indexOf' : 'lastIndexOf';
var argument0 = Blockly.JavaScript.valueToCode(block, 'FIND',
Blockly.JavaScript.ORDER_NONE) || '\'\'';
var argument1 = Blockly.JavaScript.valueToCode(block, 'VALUE',
Blockly.JavaScript.ORDER_MEMBER) || '[]';
var code = argument1 + '.' + operator + '(' + argument0 + ') + 1';
return [code, Blockly.JavaScript.ORDER_MEMBER];
};
Blockly.JavaScript['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.JavaScript.valueToCode(block, 'AT',
Blockly.JavaScript.ORDER_UNARY_NEGATION) || '1';
var list = Blockly.JavaScript.valueToCode(block, 'VALUE',
Blockly.JavaScript.ORDER_MEMBER) || '[]';
if (where == 'FIRST') {
if (mode == 'GET') {
var code = list + '[0]';
return [code, Blockly.JavaScript.ORDER_MEMBER];
} else if (mode == 'GET_REMOVE') {
var code = list + '.shift()';
return [code, Blockly.JavaScript.ORDER_MEMBER];
} else if (mode == 'REMOVE') {
return list + '.shift();\n';
}
} else if (where == 'LAST') {
if (mode == 'GET') {
var code = list + '.slice(-1)[0]';
return [code, Blockly.JavaScript.ORDER_MEMBER];
} else if (mode == 'GET_REMOVE') {
var code = list + '.pop()';
return [code, Blockly.JavaScript.ORDER_MEMBER];
} else if (mode == 'REMOVE') {
return list + '.pop();\n';
}
} else if (where == 'FROM_START') {
// Blockly uses one-based indicies.
if (Blockly.isNumber(at)) {
// If the index is a naked number, decrement it right now.
at = parseFloat(at) - 1;
} else {
// If the index is dynamic, decrement it in code.
at += ' - 1';
}
if (mode == 'GET') {
var code = list + '[' + at + ']';
return [code, Blockly.JavaScript.ORDER_MEMBER];
} else if (mode == 'GET_REMOVE') {
var code = list + '.splice(' + at + ', 1)[0]';
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
} else if (mode == 'REMOVE') {
return list + '.splice(' + at + ', 1);\n';
}
} else if (where == 'FROM_END') {
if (mode == 'GET') {
var code = list + '.slice(-' + at + ')[0]';
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
} else if (mode == 'GET_REMOVE' || mode == 'REMOVE') {
if (!Blockly.JavaScript.definitions_['lists_remove_from_end']) {
var functionName = Blockly.JavaScript.variableDB_.getDistinctName(
'lists_remove_from_end', Blockly.Generator.NAME_TYPE);
Blockly.JavaScript.lists_getIndex.lists_remove_from_end = functionName;
var func = [];
func.push('function ' + functionName + '(list, x) {');
func.push(' x = list.length - x;');
func.push(' return list.splice(x, 1)[0];');
func.push('}');
Blockly.JavaScript.definitions_['lists_remove_from_end'] =
func.join('\n');
}
code = Blockly.JavaScript.lists_getIndex.lists_remove_from_end +
'(' + list + ', ' + at + ')';
if (mode == 'GET_REMOVE') {
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
} else if (mode == 'REMOVE') {
return code + ';\n';
}
}
} else if (where == 'RANDOM') {
if (!Blockly.JavaScript.definitions_['lists_get_random_item']) {
var functionName = Blockly.JavaScript.variableDB_.getDistinctName(
'lists_get_random_item', Blockly.Generator.NAME_TYPE);
Blockly.JavaScript.lists_getIndex.random = functionName;
var func = [];
func.push('function ' + functionName + '(list, remove) {');
func.push(' var x = Math.floor(Math.random() * list.length);');
func.push(' if (remove) {');
func.push(' return list.splice(x, 1)[0];');
func.push(' } else {');
func.push(' return list[x];');
func.push(' }');
func.push('}');
Blockly.JavaScript.definitions_['lists_get_random_item'] =
func.join('\n');
}
code = Blockly.JavaScript.lists_getIndex.random +
'(' + list + ', ' + (mode != 'GET') + ')';
if (mode == 'GET' || mode == 'GET_REMOVE') {
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
} else if (mode == 'REMOVE') {
return code + ';\n';
}
}
throw 'Unhandled combination (lists_getIndex).';
};
Blockly.JavaScript['lists_setIndex'] = function(block) {
// Set element at index.
// Note: Until February 2013 this block did not have MODE or WHERE inputs.
var list = Blockly.JavaScript.valueToCode(block, 'LIST',
Blockly.JavaScript.ORDER_MEMBER) || '[]';
var mode = block.getTitleValue('MODE') || 'GET';
var where = block.getTitleValue('WHERE') || 'FROM_START';
var at = Blockly.JavaScript.valueToCode(block, 'AT',
Blockly.JavaScript.ORDER_NONE) || '1';
var value = Blockly.JavaScript.valueToCode(block, 'TO',
Blockly.JavaScript.ORDER_ASSIGNMENT) || 'null';
// Cache non-trivial values to variables to prevent repeated look-ups.
// Closure, which accesses and modifies 'list'.
function cacheList() {
if (list.match(/^\w+$/)) {
return '';
}
var listVar = Blockly.JavaScript.variableDB_.getDistinctName(
'tmp_list', Blockly.Variables.NAME_TYPE);
var code = 'var ' + listVar + ' = ' + list + ';\n';
list = listVar;
return code;
}
if (where == 'FIRST') {
if (mode == 'SET') {
return list + '[0] = ' + value + ';\n';
} else if (mode == 'INSERT') {
return list + '.unshift(' + value + ');\n';
}
} else if (where == 'LAST') {
if (mode == 'SET') {
var code = cacheList();
code += list + '[' + list + '.length - 1] = ' + value + ';\n';
return code;
} else if (mode == 'INSERT') {
return list + '.push(' + value + ');\n';
}
} else if (where == 'FROM_START') {
// Blockly uses one-based indicies.
if (Blockly.isNumber(at)) {
// If the index is a naked number, decrement it right now.
at = parseFloat(at) - 1;
} else {
// If the index is dynamic, decrement it in code.
at += ' - 1';
}
if (mode == 'SET') {
return list + '[' + at + '] = ' + value + ';\n';
} else if (mode == 'INSERT') {
return list + '.splice(' + at + ', 0, ' + value + ');\n';
}
} else if (where == 'FROM_END') {
var code = cacheList();
if (mode == 'SET') {
code += list + '[' + list + '.length - ' + at + '] = ' + value + ';\n';
return code;
} else if (mode == 'INSERT') {
code += list + '.splice(' + list + '.length - ' + at + ', 0, ' + value +
');\n';
return code;
}
} else if (where == 'RANDOM') {
var code = cacheList();
var xVar = Blockly.JavaScript.variableDB_.getDistinctName(
'tmp_x', Blockly.Variables.NAME_TYPE);
code += 'var ' + xVar + ' = Math.floor(Math.random() * ' + list +
'.length);\n';
if (mode == 'SET') {
code += list + '[' + xVar + '] = ' + value + ';\n';
return code;
} else if (mode == 'INSERT') {
code += list + '.splice(' + xVar + ', 0, ' + value + ');\n';
return code;
}
}
throw 'Unhandled combination (lists_setIndex).';
};
Blockly.JavaScript['lists_getSublist'] = function(block) {
// Get sublist.
var list = Blockly.JavaScript.valueToCode(block, 'LIST',
Blockly.JavaScript.ORDER_MEMBER) || '[]';
var where1 = block.getTitleValue('WHERE1');
var where2 = block.getTitleValue('WHERE2');
var at1 = Blockly.JavaScript.valueToCode(block, 'AT1',
Blockly.JavaScript.ORDER_NONE) || '1';
var at2 = Blockly.JavaScript.valueToCode(block, 'AT2',
Blockly.JavaScript.ORDER_NONE) || '1';
if (where1 == 'FIRST' && where2 == 'LAST') {
var code = list + '.concat()';
} else {
if (!Blockly.JavaScript.definitions_['lists_get_sublist']) {
var functionName = Blockly.JavaScript.variableDB_.getDistinctName(
'lists_get_sublist', Blockly.Generator.NAME_TYPE);
Blockly.JavaScript.lists_getSublist.func = functionName;
var func = [];
func.push('function ' + functionName +
'(list, where1, at1, where2, at2) {');
func.push(' function getAt(where, at) {');
func.push(' if (where == \'FROM_START\') {');
func.push(' at--;');
func.push(' } else if (where == \'FROM_END\') {');
func.push(' at = list.length - at;');
func.push(' } else if (where == \'FIRST\') {');
func.push(' at = 0;');
func.push(' } else if (where == \'LAST\') {');
func.push(' at = list.length - 1;');
func.push(' } else {');
func.push(' throw \'Unhandled option (lists_getSublist).\';');
func.push(' }');
func.push(' return at;');
func.push(' }');
func.push(' at1 = getAt(where1, at1);');
func.push(' at2 = getAt(where2, at2) + 1;');
func.push(' return list.slice(at1, at2);');
func.push('}');
Blockly.JavaScript.definitions_['lists_get_sublist'] =
func.join('\n');
}
var code = Blockly.JavaScript.lists_getSublist.func + '(' + list + ', \'' +
where1 + '\', ' + at1 + ', \'' + where2 + '\', ' + at2 + ')';
}
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
};

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/**
* Visual Blocks Language
*
* Copyright 2012 Google Inc.
* http://blockly.googlecode.com/
*
* 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 JavaScript for logic blocks.
* @author q.neutron@gmail.com (Quynh Neutron)
*/
'use strict';
goog.provide('Blockly.JavaScript.logic');
goog.require('Blockly.JavaScript');
Blockly.JavaScript['controls_if'] = function(block) {
// If/elseif/else condition.
var n = 0;
var argument = Blockly.JavaScript.valueToCode(block, 'IF' + n,
Blockly.JavaScript.ORDER_NONE) || 'false';
var branch = Blockly.JavaScript.statementToCode(block, 'DO' + n);
var code = 'if (' + argument + ') {\n' + branch + '}';
for (n = 1; n <= block.elseifCount_; n++) {
argument = Blockly.JavaScript.valueToCode(block, 'IF' + n,
Blockly.JavaScript.ORDER_NONE) || 'false';
branch = Blockly.JavaScript.statementToCode(block, 'DO' + n);
code += ' else if (' + argument + ') {\n' + branch + '}';
}
if (block.elseCount_) {
branch = Blockly.JavaScript.statementToCode(block, 'ELSE');
code += ' else {\n' + branch + '}\n';
}
return code + '\n';
};
Blockly.JavaScript['logic_compare'] = function(block) {
// Comparison operator.
var OPERATORS = {
EQ: '==',
NEQ: '!=',
LT: '<',
LTE: '<=',
GT: '>',
GTE: '>='
};
var operator = OPERATORS[block.getTitleValue('OP')];
var order = (operator == '==' || operator == '!=') ?
Blockly.JavaScript.ORDER_EQUALITY : Blockly.JavaScript.ORDER_RELATIONAL;
var argument0 = Blockly.JavaScript.valueToCode(block, 'A', order) || '0';
var argument1 = Blockly.JavaScript.valueToCode(block, 'B', order) || '0';
var code = argument0 + ' ' + operator + ' ' + argument1;
return [code, order];
};
Blockly.JavaScript['logic_operation'] = function(block) {
// Operations 'and', 'or'.
var operator = (block.getTitleValue('OP') == 'AND') ? '&&' : '||';
var order = (operator == '&&') ? Blockly.JavaScript.ORDER_LOGICAL_AND :
Blockly.JavaScript.ORDER_LOGICAL_OR;
var argument0 = Blockly.JavaScript.valueToCode(block, 'A', order);
var argument1 = Blockly.JavaScript.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 == '&&') ? 'true' : 'false';
if (!argument0) {
argument0 = defaultArgument;
}
if (!argument1) {
argument1 = defaultArgument;
}
}
var code = argument0 + ' ' + operator + ' ' + argument1;
return [code, order];
};
Blockly.JavaScript['logic_negate'] = function(block) {
// Negation.
var order = Blockly.JavaScript.ORDER_LOGICAL_NOT;
var argument0 = Blockly.JavaScript.valueToCode(block, 'BOOL', order) ||
'true';
var code = '!' + argument0;
return [code, order];
};
Blockly.JavaScript['logic_boolean'] = function(block) {
// Boolean values true and false.
var code = (block.getTitleValue('BOOL') == 'TRUE') ? 'true' : 'false';
return [code, Blockly.JavaScript.ORDER_ATOMIC];
};
Blockly.JavaScript['logic_null'] = function(block) {
// Null data type.
return ['null', Blockly.JavaScript.ORDER_ATOMIC];
};
Blockly.JavaScript['logic_ternary'] = function(block) {
// Ternary operator.
var value_if = Blockly.JavaScript.valueToCode(block, 'IF',
Blockly.JavaScript.ORDER_CONDITIONAL) || 'false';
var value_then = Blockly.JavaScript.valueToCode(block, 'THEN',
Blockly.JavaScript.ORDER_CONDITIONAL) || 'null';
var value_else = Blockly.JavaScript.valueToCode(block, 'ELSE',
Blockly.JavaScript.ORDER_CONDITIONAL) || 'null';
var code = value_if + ' ? ' + value_then + ' : ' + value_else
return [code, Blockly.JavaScript.ORDER_CONDITIONAL];
};

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/**
* Visual Blocks Language
*
* Copyright 2012 Google Inc.
* http://blockly.googlecode.com/
*
* 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 JavaScript for loop blocks.
* @author fraser@google.com (Neil Fraser)
*/
'use strict';
goog.provide('Blockly.JavaScript.loops');
goog.require('Blockly.JavaScript');
Blockly.JavaScript['controls_repeat'] = function(block) {
// Repeat n times (internal number).
var repeats = Number(block.getTitleValue('TIMES'));
var branch = Blockly.JavaScript.statementToCode(block, 'DO');
if (Blockly.JavaScript.INFINITE_LOOP_TRAP) {
branch = Blockly.JavaScript.INFINITE_LOOP_TRAP.replace(/%1/g,
'\'' + block.id + '\'') + branch;
}
var loopVar = Blockly.JavaScript.variableDB_.getDistinctName(
'count', Blockly.Variables.NAME_TYPE);
var code = 'for (var ' + loopVar + ' = 0; ' +
loopVar + ' < ' + repeats + '; ' +
loopVar + '++) {\n' +
branch + '}\n';
return code;
};
Blockly.JavaScript['controls_repeat_ext'] = function(block) {
// Repeat n times (external number).
var repeats = Blockly.JavaScript.valueToCode(block, 'TIMES',
Blockly.JavaScript.ORDER_ASSIGNMENT) || '0';
var branch = Blockly.JavaScript.statementToCode(block, 'DO');
if (Blockly.JavaScript.INFINITE_LOOP_TRAP) {
branch = Blockly.JavaScript.INFINITE_LOOP_TRAP.replace(/%1/g,
'\'' + block.id + '\'') + branch;
}
var code = '';
var loopVar = Blockly.JavaScript.variableDB_.getDistinctName(
'count', Blockly.Variables.NAME_TYPE);
var endVar = repeats;
if (!repeats.match(/^\w+$/) && !Blockly.isNumber(repeats)) {
var endVar = Blockly.JavaScript.variableDB_.getDistinctName(
'repeat_end', Blockly.Variables.NAME_TYPE);
code += 'var ' + endVar + ' = ' + repeats + ';\n';
}
code += 'for (var ' + loopVar + ' = 0; ' +
loopVar + ' < ' + endVar + '; ' +
loopVar + '++) {\n' +
branch + '}\n';
return code;
};
Blockly.JavaScript['controls_whileUntil'] = function(block) {
// Do while/until loop.
var until = block.getTitleValue('MODE') == 'UNTIL';
var argument0 = Blockly.JavaScript.valueToCode(block, 'BOOL',
until ? Blockly.JavaScript.ORDER_LOGICAL_NOT :
Blockly.JavaScript.ORDER_NONE) || 'false';
var branch = Blockly.JavaScript.statementToCode(block, 'DO');
if (Blockly.JavaScript.INFINITE_LOOP_TRAP) {
branch = Blockly.JavaScript.INFINITE_LOOP_TRAP.replace(/%1/g,
'\'' + block.id + '\'') + branch;
}
if (until) {
argument0 = '!' + argument0;
}
return 'while (' + argument0 + ') {\n' + branch + '}\n';
};
Blockly.JavaScript['controls_for'] = function(block) {
// For loop.
var variable0 = Blockly.JavaScript.variableDB_.getName(
block.getTitleValue('VAR'), Blockly.Variables.NAME_TYPE);
var argument0 = Blockly.JavaScript.valueToCode(block, 'FROM',
Blockly.JavaScript.ORDER_ASSIGNMENT) || '0';
var argument1 = Blockly.JavaScript.valueToCode(block, 'TO',
Blockly.JavaScript.ORDER_ASSIGNMENT) || '0';
var increment = Blockly.JavaScript.valueToCode(block, 'BY',
Blockly.JavaScript.ORDER_ASSIGNMENT) || '1';
var branch = Blockly.JavaScript.statementToCode(block, 'DO');
if (Blockly.JavaScript.INFINITE_LOOP_TRAP) {
branch = Blockly.JavaScript.INFINITE_LOOP_TRAP.replace(/%1/g,
'\'' + block.id + '\'') + branch;
}
var code;
if (Blockly.isNumber(argument0) && Blockly.isNumber(argument1) &&
Blockly.isNumber(increment)) {
// All arguments are simple numbers.
var up = parseFloat(argument0) <= parseFloat(argument1);
code = 'for (' + variable0 + ' = ' + argument0 + '; ' +
variable0 + (up ? ' <= ' : ' >= ') + argument1 + '; ' +
variable0;
var step = Math.abs(parseFloat(increment));
if (step == 1) {
code += up ? '++' : '--';
} else {
code += (up ? ' += ' : ' -= ') + step;
}
code += ') {\n' + branch + '}\n';
} else {
code = '';
// Cache non-trivial values to variables to prevent repeated look-ups.
var startVar = argument0;
if (!argument0.match(/^\w+$/) && !Blockly.isNumber(argument0)) {
var startVar = Blockly.JavaScript.variableDB_.getDistinctName(
variable0 + '_start', Blockly.Variables.NAME_TYPE);
code += 'var ' + startVar + ' = ' + argument0 + ';\n';
}
var endVar = argument1;
if (!argument1.match(/^\w+$/) && !Blockly.isNumber(argument1)) {
var endVar = Blockly.JavaScript.variableDB_.getDistinctName(
variable0 + '_end', Blockly.Variables.NAME_TYPE);
code += 'var ' + endVar + ' = ' + argument1 + ';\n';
}
// Determine loop direction at start, in case one of the bounds
// changes during loop execution.
var incVar = Blockly.JavaScript.variableDB_.getDistinctName(
variable0 + '_inc', Blockly.Variables.NAME_TYPE);
code += 'var ' + incVar + ' = ';
if (Blockly.isNumber(increment)) {
code += Math.abs(increment) + ';\n';
} else {
code += 'Math.abs(' + increment + ');\n';
}
code += 'if (' + startVar + ' > ' + endVar + ') {\n';
code += ' ' + incVar + ' = -' + incVar +';\n';
code += '}\n';
code += 'for (' + variable0 + ' = ' + startVar + ';\n' +
' ' + incVar + ' >= 0 ? ' +
variable0 + ' <= ' + endVar + ' : ' +
variable0 + ' >= ' + endVar + ';\n' +
' ' + variable0 + ' += ' + incVar + ') {\n' +
branch + '}\n';
}
return code;
};
Blockly.JavaScript['controls_forEach'] = function(block) {
// For each loop.
var variable0 = Blockly.JavaScript.variableDB_.getName(
block.getTitleValue('VAR'), Blockly.Variables.NAME_TYPE);
var argument0 = Blockly.JavaScript.valueToCode(block, 'LIST',
Blockly.JavaScript.ORDER_ASSIGNMENT) || '[]';
var branch = Blockly.JavaScript.statementToCode(block, 'DO');
if (Blockly.JavaScript.INFINITE_LOOP_TRAP) {
branch = Blockly.JavaScript.INFINITE_LOOP_TRAP.replace(/%1/g,
'\'' + block.id + '\'') + branch;
}
var code;
var indexVar = Blockly.JavaScript.variableDB_.getDistinctName(
variable0 + '_index', Blockly.Variables.NAME_TYPE);
if (argument0.match(/^\w+$/)) {
branch = ' ' + variable0 + ' = ' + argument0 + '[' + indexVar + '];\n' +
branch;
code = 'for (var ' + indexVar + ' in ' + argument0 + ') {\n' +
branch + '}\n';
} else {
// The list appears to be more complicated than a simple variable.
// Cache it to a variable to prevent repeated look-ups.
var listVar = Blockly.JavaScript.variableDB_.getDistinctName(
variable0 + '_list', Blockly.Variables.NAME_TYPE);
branch = ' ' + variable0 + ' = ' + listVar + '[' + indexVar + '];\n' +
branch;
code = 'var ' + listVar + ' = ' + argument0 + ';\n' +
'for (var ' + indexVar + ' in ' + listVar + ') {\n' +
branch + '}\n';
}
return code;
};
Blockly.JavaScript['controls_flow_statements'] = function(block) {
// Flow statements: continue, break.
switch (block.getTitleValue('FLOW')) {
case 'BREAK':
return 'break;\n';
case 'CONTINUE':
return 'continue;\n';
}
throw 'Unknown flow statement.';
};

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/**
* Visual Blocks Language
*
* Copyright 2012 Google Inc.
* http://blockly.googlecode.com/
*
* 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 JavaScript for math blocks.
* @author q.neutron@gmail.com (Quynh Neutron)
*/
'use strict';
goog.provide('Blockly.JavaScript.math');
goog.require('Blockly.JavaScript');
Blockly.JavaScript['math_number'] = function(block) {
// Numeric value.
var code = parseFloat(block.getTitleValue('NUM'));
return [code, Blockly.JavaScript.ORDER_ATOMIC];
};
Blockly.JavaScript['math_arithmetic'] = function(block) {
// Basic arithmetic operators, and power.
var OPERATORS = {
ADD: [' + ', Blockly.JavaScript.ORDER_ADDITION],
MINUS: [' - ', Blockly.JavaScript.ORDER_SUBTRACTION],
MULTIPLY: [' * ', Blockly.JavaScript.ORDER_MULTIPLICATION],
DIVIDE: [' / ', Blockly.JavaScript.ORDER_DIVISION],
POWER: [null, Blockly.JavaScript.ORDER_COMMA] // Handle power separately.
};
var tuple = OPERATORS[block.getTitleValue('OP')];
var operator = tuple[0];
var order = tuple[1];
var argument0 = Blockly.JavaScript.valueToCode(block, 'A', order) || '0';
var argument1 = Blockly.JavaScript.valueToCode(block, 'B', order) || '0';
var code;
// Power in JavaScript requires a special case since it has no operator.
if (!operator) {
code = 'Math.pow(' + argument0 + ', ' + argument1 + ')';
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
}
code = argument0 + operator + argument1;
return [code, order];
};
Blockly.JavaScript['math_single'] = function(block) {
// Math operators with single operand.
var operator = block.getTitleValue('OP');
var code;
var arg;
if (operator == 'NEG') {
// Negation is a special case given its different operator precedence.
arg = Blockly.JavaScript.valueToCode(block, 'NUM',
Blockly.JavaScript.ORDER_UNARY_NEGATION) || '0';
if (arg[0] == '-') {
// --3 is not legal in JS.
arg = ' ' + arg;
}
code = '-' + arg;
return [code, Blockly.JavaScript.ORDER_UNARY_NEGATION];
}
if (operator == 'SIN' || operator == 'COS' || operator == 'TAN') {
arg = Blockly.JavaScript.valueToCode(block, 'NUM',
Blockly.JavaScript.ORDER_DIVISION) || '0';
} else {
arg = Blockly.JavaScript.valueToCode(block, 'NUM',
Blockly.JavaScript.ORDER_NONE) || '0';
}
// First, handle cases which generate values that don't need parentheses
// wrapping the code.
switch (operator) {
case 'ABS':
code = 'Math.abs(' + arg + ')';
break;
case 'ROOT':
code = 'Math.sqrt(' + arg + ')';
break;
case 'LN':
code = 'Math.log(' + arg + ')';
break;
case 'EXP':
code = 'Math.exp(' + arg + ')';
break;
case 'POW10':
code = 'Math.pow(10,' + arg + ')';
break;
case 'ROUND':
code = 'Math.round(' + arg + ')';
break;
case 'ROUNDUP':
code = 'Math.ceil(' + arg + ')';
break;
case 'ROUNDDOWN':
code = 'Math.floor(' + arg + ')';
break;
case 'SIN':
code = 'Math.sin(' + arg + ' / 180 * Math.PI)';
break;
case 'COS':
code = 'Math.cos(' + arg + ' / 180 * Math.PI)';
break;
case 'TAN':
code = 'Math.tan(' + arg + ' / 180 * Math.PI)';
break;
}
if (code) {
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
}
// Second, handle cases which generate values that may need parentheses
// wrapping the code.
switch (operator) {
case 'LOG10':
code = 'Math.log(' + arg + ') / Math.log(10)';
break;
case 'ASIN':
code = 'Math.asin(' + arg + ') / Math.PI * 180';
break;
case 'ACOS':
code = 'Math.acos(' + arg + ') / Math.PI * 180';
break;
case 'ATAN':
code = 'Math.atan(' + arg + ') / Math.PI * 180';
break;
default:
throw 'Unknown math operator: ' + operator;
}
return [code, Blockly.JavaScript.ORDER_DIVISION];
};
Blockly.JavaScript['math_constant'] = function(block) {
// Constants: PI, E, the Golden Ratio, sqrt(2), 1/sqrt(2), INFINITY.
var CONSTANTS = {
PI: ['Math.PI', Blockly.JavaScript.ORDER_MEMBER],
E: ['Math.E', Blockly.JavaScript.ORDER_MEMBER],
GOLDEN_RATIO: ['(1 + Math.sqrt(5)) / 2', Blockly.JavaScript.ORDER_DIVISION],
SQRT2: ['Math.SQRT2', Blockly.JavaScript.ORDER_MEMBER],
SQRT1_2: ['Math.SQRT1_2', Blockly.JavaScript.ORDER_MEMBER],
INFINITY: ['Infinity', Blockly.JavaScript.ORDER_ATOMIC]
};
return CONSTANTS[block.getTitleValue('CONSTANT')];
};
Blockly.JavaScript['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.JavaScript.valueToCode(block, 'NUMBER_TO_CHECK',
Blockly.JavaScript.ORDER_MODULUS) || '0';
var dropdown_property = block.getTitleValue('PROPERTY');
var code;
if (dropdown_property == 'PRIME') {
// Prime is a special case as it is not a one-liner test.
if (!Blockly.JavaScript.definitions_['isPrime']) {
var functionName = Blockly.JavaScript.variableDB_.getDistinctName(
'isPrime', Blockly.Generator.NAME_TYPE);
Blockly.JavaScript.logic_prime= functionName;
var func = [];
func.push('function ' + functionName + '(n) {');
func.push(' // http://en.wikipedia.org/wiki/Primality_test#Naive_methods');
func.push(' if (n == 2 || n == 3) {');
func.push(' return true;');
func.push(' }');
func.push(' // False if n is NaN, negative, is 1, or not whole.');
func.push(' // And false if n is divisible by 2 or 3.');
func.push(' if (isNaN(n) || n <= 1 || n % 1 != 0 || n % 2 == 0 ||' +
' n % 3 == 0) {');
func.push(' return false;');
func.push(' }');
func.push(' // Check all the numbers of form 6k +/- 1, up to sqrt(n).');
func.push(' for (var x = 6; x <= Math.sqrt(n) + 1; x += 6) {');
func.push(' if (n % (x - 1) == 0 || n % (x + 1) == 0) {');
func.push(' return false;');
func.push(' }');
func.push(' }');
func.push(' return true;');
func.push('}');
Blockly.JavaScript.definitions_['isPrime'] = func.join('\n');
}
code = Blockly.JavaScript.logic_prime + '(' + number_to_check + ')';
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
}
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.JavaScript.valueToCode(block, 'DIVISOR',
Blockly.JavaScript.ORDER_MODULUS) || '0';
code = number_to_check + ' % ' + divisor + ' == 0';
break;
}
return [code, Blockly.JavaScript.ORDER_EQUALITY];
};
Blockly.JavaScript['math_change'] = function(block) {
// Add to a variable in place.
var argument0 = Blockly.JavaScript.valueToCode(block, 'DELTA',
Blockly.JavaScript.ORDER_ADDITION) || '0';
var varName = Blockly.JavaScript.variableDB_.getName(
block.getTitleValue('VAR'), Blockly.Variables.NAME_TYPE);
return varName + ' = (typeof ' + varName + ' == \'number\' ? ' + varName +
' : 0) + ' + argument0 + ';\n';
};
// Rounding functions have a single operand.
Blockly.JavaScript['math_round'] = Blockly.JavaScript['math_single'];
// Trigonometry functions have a single operand.
Blockly.JavaScript['math_trig'] = Blockly.JavaScript['math_single'];
Blockly.JavaScript['math_on_list'] = function(block) {
// Math functions for lists.
var func = block.getTitleValue('OP');
var list, code;
switch (func) {
case 'SUM':
list = Blockly.JavaScript.valueToCode(block, 'LIST',
Blockly.JavaScript.ORDER_MEMBER) || '[]';
code = list + '.reduce(function(x, y) {return x + y;})';
break;
case 'MIN':
list = Blockly.JavaScript.valueToCode(block, 'LIST',
Blockly.JavaScript.ORDER_COMMA) || '[]';
code = 'Math.min.apply(null, ' + list + ')';
break;
case 'MAX':
list = Blockly.JavaScript.valueToCode(block, 'LIST',
Blockly.JavaScript.ORDER_COMMA) || '[]';
code = 'Math.max.apply(null, ' + list + ')';
break;
case 'AVERAGE':
// math_median([null,null,1,3]) == 2.0.
if (!Blockly.JavaScript.definitions_['math_mean']) {
var functionName = Blockly.JavaScript.variableDB_.getDistinctName(
'math_mean', Blockly.Generator.NAME_TYPE);
Blockly.JavaScript.math_on_list.math_mean = functionName;
var func = [];
func.push('function ' + functionName + '(myList) {');
func.push(' return myList.reduce(function(x, y) {return x + y;}) / ' +
'myList.length;');
func.push('}');
Blockly.JavaScript.definitions_['math_mean'] = func.join('\n');
}
list = Blockly.JavaScript.valueToCode(block, 'LIST',
Blockly.JavaScript.ORDER_NONE) || '[]';
code = Blockly.JavaScript.math_on_list.math_mean + '(' + list + ')';
break;
case 'MEDIAN':
// math_median([null,null,1,3]) == 2.0.
if (!Blockly.JavaScript.definitions_['math_median']) {
var functionName = Blockly.JavaScript.variableDB_.getDistinctName(
'math_median', Blockly.Generator.NAME_TYPE);
Blockly.JavaScript.math_on_list.math_median = functionName;
var func = [];
func.push('function ' + functionName + '(myList) {');
func.push(' var localList = myList.filter(function (x) ' +
'{return typeof x == \'number\';});');
func.push(' if (!localList.length) return null;');
func.push(' localList.sort(function(a, b) {return b - a;});');
func.push(' if (localList.length % 2 == 0) {');
func.push(' return (localList[localList.length / 2 - 1] + ' +
'localList[localList.length / 2]) / 2;');
func.push(' } else {');
func.push(' return localList[(localList.length - 1) / 2];');
func.push(' }');
func.push('}');
Blockly.JavaScript.definitions_['math_median'] = func.join('\n');
}
list = Blockly.JavaScript.valueToCode(block, 'LIST',
Blockly.JavaScript.ORDER_NONE) || '[]';
code = Blockly.JavaScript.math_on_list.math_median + '(' + list + ')';
break;
case 'MODE':
if (!Blockly.JavaScript.definitions_['math_modes']) {
var functionName = Blockly.JavaScript.variableDB_.getDistinctName(
'math_modes', Blockly.Generator.NAME_TYPE);
Blockly.JavaScript.math_on_list.math_modes = functionName;
// As a list of numbers can contain more than one mode,
// the returned result is provided as an array.
// Mode of [3, 'x', 'x', 1, 1, 2, '3'] -> ['x', 1].
var func = [];
func.push('function ' + functionName + '(values) {');
func.push(' var modes = [];');
func.push(' var counts = [];');
func.push(' var maxCount = 0;');
func.push(' for (var i = 0; i < values.length; i++) {');
func.push(' var value = values[i];');
func.push(' var found = false;');
func.push(' var thisCount;');
func.push(' for (var j = 0; j < counts.length; j++) {');
func.push(' if (counts[j][0] === value) {');
func.push(' thisCount = ++counts[j][1];');
func.push(' found = true;');
func.push(' break;');
func.push(' }');
func.push(' }');
func.push(' if (!found) {');
func.push(' counts.push([value, 1]);');
func.push(' thisCount = 1;');
func.push(' }');
func.push(' maxCount = Math.max(thisCount, maxCount);');
func.push(' }');
func.push(' for (var j = 0; j < counts.length; j++) {');
func.push(' if (counts[j][1] == maxCount) {');
func.push(' modes.push(counts[j][0]);');
func.push(' }');
func.push(' }');
func.push(' return modes;');
func.push('}');
Blockly.JavaScript.definitions_['math_modes'] = func.join('\n');
}
list = Blockly.JavaScript.valueToCode(block, 'LIST',
Blockly.JavaScript.ORDER_NONE) || '[]';
code = Blockly.JavaScript.math_on_list.math_modes + '(' + list + ')';
break;
case 'STD_DEV':
if (!Blockly.JavaScript.definitions_['math_standard_deviation']) {
var functionName = Blockly.JavaScript.variableDB_.getDistinctName(
'math_standard_deviation', Blockly.Generator.NAME_TYPE);
Blockly.JavaScript.math_on_list.math_standard_deviation = functionName;
var func = [];
func.push('function ' + functionName + '(numbers) {');
func.push(' var n = numbers.length;');
func.push(' if (!n) return null;');
func.push(' var mean = numbers.reduce(function(x, y) ' +
'{return x + y;}) / n;');
func.push(' var variance = 0;');
func.push(' for (var j = 0; j < n; j++) {');
func.push(' variance += Math.pow(numbers[j] - mean, 2);');
func.push(' }');
func.push(' variance = variance / n;');
func.push(' return Math.sqrt(variance);');
func.push('}');
Blockly.JavaScript.definitions_['math_standard_deviation'] =
func.join('\n');
}
list = Blockly.JavaScript.valueToCode(block, 'LIST',
Blockly.JavaScript.ORDER_NONE) || '[]';
code = Blockly.JavaScript.math_on_list.math_standard_deviation +
'(' + list + ')';
break;
case 'RANDOM':
if (!Blockly.JavaScript.definitions_['math_random_item']) {
var functionName = Blockly.JavaScript.variableDB_.getDistinctName(
'math_random_item', Blockly.Generator.NAME_TYPE);
Blockly.JavaScript.math_on_list.math_random_item = functionName;
var func = [];
func.push('function ' + functionName + '(list) {');
func.push(' var x = Math.floor(Math.random() * list.length);');
func.push(' return list[x];');
func.push('}');
Blockly.JavaScript.definitions_['math_random_item'] = func.join('\n');
}
list = Blockly.JavaScript.valueToCode(block, 'LIST',
Blockly.JavaScript.ORDER_NONE) || '[]';
code = Blockly.JavaScript.math_on_list.math_random_item +
'(' + list + ')';
break;
default:
throw 'Unknown operator: ' + func;
}
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
};
Blockly.JavaScript['math_modulo'] = function(block) {
// Remainder computation.
var argument0 = Blockly.JavaScript.valueToCode(block, 'DIVIDEND',
Blockly.JavaScript.ORDER_MODULUS) || '0';
var argument1 = Blockly.JavaScript.valueToCode(block, 'DIVISOR',
Blockly.JavaScript.ORDER_MODULUS) || '0';
var code = argument0 + ' % ' + argument1;
return [code, Blockly.JavaScript.ORDER_MODULUS];
};
Blockly.JavaScript['math_constrain'] = function(block) {
// Constrain a number between two limits.
var argument0 = Blockly.JavaScript.valueToCode(block, 'VALUE',
Blockly.JavaScript.ORDER_COMMA) || '0';
var argument1 = Blockly.JavaScript.valueToCode(block, 'LOW',
Blockly.JavaScript.ORDER_COMMA) || '0';
var argument2 = Blockly.JavaScript.valueToCode(block, 'HIGH',
Blockly.JavaScript.ORDER_COMMA) || 'Infinity';
var code = 'Math.min(Math.max(' + argument0 + ', ' + argument1 + '), ' +
argument2 + ')';
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
};
Blockly.JavaScript['math_random_int'] = function(block) {
// Random integer between [X] and [Y].
var argument0 = Blockly.JavaScript.valueToCode(block, 'FROM',
Blockly.JavaScript.ORDER_COMMA) || '0';
var argument1 = Blockly.JavaScript.valueToCode(block, 'TO',
Blockly.JavaScript.ORDER_COMMA) || '0';
if (!Blockly.JavaScript.definitions_['math_random_int']) {
var functionName = Blockly.JavaScript.variableDB_.getDistinctName(
'math_random_int', Blockly.Generator.NAME_TYPE);
Blockly.JavaScript.math_random_int.random_function = functionName;
var func = [];
func.push('function ' + functionName + '(a, b) {');
func.push(' if (a > b) {');
func.push(' // Swap a and b to ensure a is smaller.');
func.push(' var c = a;');
func.push(' a = b;');
func.push(' b = c;');
func.push(' }');
func.push(' return Math.floor(Math.random() * (b - a + 1) + a);');
func.push('}');
Blockly.JavaScript.definitions_['math_random_int'] = func.join('\n');
}
var code = Blockly.JavaScript.math_random_int.random_function +
'(' + argument0 + ', ' + argument1 + ')';
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
};
Blockly.JavaScript['math_random_float'] = function(block) {
// Random fraction between 0 and 1.
return ['Math.random()', Blockly.JavaScript.ORDER_FUNCTION_CALL];
};

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/**
* Visual Blocks Language
*
* Copyright 2012 Google Inc.
* http://blockly.googlecode.com/
*
* 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 JavaScript for procedure blocks.
* @author fraser@google.com (Neil Fraser)
*/
'use strict';
goog.provide('Blockly.JavaScript.procedures');
goog.require('Blockly.JavaScript');
Blockly.JavaScript['procedures_defreturn'] = function(block) {
// Define a procedure with a return value.
var funcName = Blockly.JavaScript.variableDB_.getName(
block.getTitleValue('NAME'), Blockly.Procedures.NAME_TYPE);
var branch = Blockly.JavaScript.statementToCode(block, 'STACK');
if (Blockly.JavaScript.INFINITE_LOOP_TRAP) {
branch = Blockly.JavaScript.INFINITE_LOOP_TRAP.replace(/%1/g,
'\'' + block.id + '\'') + branch;
}
var returnValue = Blockly.JavaScript.valueToCode(block, 'RETURN',
Blockly.JavaScript.ORDER_NONE) || '';
if (returnValue) {
returnValue = ' return ' + returnValue + ';\n';
}
var args = [];
for (var x = 0; x < block.arguments_.length; x++) {
args[x] = Blockly.JavaScript.variableDB_.getName(block.arguments_[x],
Blockly.Variables.NAME_TYPE);
}
var code = 'function ' + funcName + '(' + args.join(', ') + ') {\n' +
branch + returnValue + '}';
code = Blockly.JavaScript.scrub_(block, code);
Blockly.JavaScript.definitions_[funcName] = code;
return null;
};
// Defining a procedure without a return value uses the same generator as
// a procedure with a return value.
Blockly.JavaScript['procedures_defnoreturn'] =
Blockly.JavaScript['procedures_defreturn'];
Blockly.JavaScript['procedures_callreturn'] = function(block) {
// Call a procedure with a return value.
var funcName = Blockly.JavaScript.variableDB_.getName(
block.getTitleValue('NAME'), Blockly.Procedures.NAME_TYPE);
var args = [];
for (var x = 0; x < block.arguments_.length; x++) {
args[x] = Blockly.JavaScript.valueToCode(block, 'ARG' + x,
Blockly.JavaScript.ORDER_COMMA) || 'null';
}
var code = funcName + '(' + args.join(', ') + ')';
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
};
Blockly.JavaScript['procedures_callnoreturn'] = function(block) {
// Call a procedure with no return value.
var funcName = Blockly.JavaScript.variableDB_.getName(
block.getTitleValue('NAME'), Blockly.Procedures.NAME_TYPE);
var args = [];
for (var x = 0; x < block.arguments_.length; x++) {
args[x] = Blockly.JavaScript.valueToCode(block, 'ARG' + x,
Blockly.JavaScript.ORDER_COMMA) || 'null';
}
var code = funcName + '(' + args.join(', ') + ');\n';
return code;
};
Blockly.JavaScript['procedures_ifreturn'] = function(block) {
// Conditionally return value from a procedure.
var condition = Blockly.JavaScript.valueToCode(block, 'CONDITION',
Blockly.JavaScript.ORDER_NONE) || 'false';
var code = 'if (' + condition + ') {\n';
if (block.hasReturnValue_) {
var value = Blockly.JavaScript.valueToCode(block, 'VALUE',
Blockly.JavaScript.ORDER_NONE) || 'null';
code += ' return ' + value + ';\n';
} else {
code += ' return;\n';
}
code += '}\n';
return code;
};

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/**
* Visual Blocks Language
*
* Copyright 2012 Google Inc.
* http://blockly.googlecode.com/
*
* 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 JavaScript for text blocks.
* @author fraser@google.com (Neil Fraser)
*/
'use strict';
goog.provide('Blockly.JavaScript.text');
goog.require('Blockly.JavaScript');
Blockly.JavaScript['text'] = function(block) {
// Text value.
var code = Blockly.JavaScript.quote_(block.getTitleValue('TEXT'));
return [code, Blockly.JavaScript.ORDER_ATOMIC];
};
Blockly.JavaScript['text_join'] = function(block) {
// Create a string made up of any number of elements of any type.
var code;
if (block.itemCount_ == 0) {
return ['\'\'', Blockly.JavaScript.ORDER_ATOMIC];
} else if (block.itemCount_ == 1) {
var argument0 = Blockly.JavaScript.valueToCode(block, 'ADD0',
Blockly.JavaScript.ORDER_NONE) || '\'\'';
code = 'String(' + argument0 + ')';
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
} else if (block.itemCount_ == 2) {
var argument0 = Blockly.JavaScript.valueToCode(block, 'ADD0',
Blockly.JavaScript.ORDER_NONE) || '\'\'';
var argument1 = Blockly.JavaScript.valueToCode(block, 'ADD1',
Blockly.JavaScript.ORDER_NONE) || '\'\'';
code = 'String(' + argument0 + ') + String(' + argument1 + ')';
return [code, Blockly.JavaScript.ORDER_ADDITION];
} else {
code = new Array(block.itemCount_);
for (var n = 0; n < block.itemCount_; n++) {
code[n] = Blockly.JavaScript.valueToCode(block, 'ADD' + n,
Blockly.JavaScript.ORDER_COMMA) || '\'\'';
}
code = '[' + code.join(',') + '].join(\'\')';
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
}
};
Blockly.JavaScript['text_append'] = function(block) {
// Append to a variable in place.
var varName = Blockly.JavaScript.variableDB_.getName(
block.getTitleValue('VAR'), Blockly.Variables.NAME_TYPE);
var argument0 = Blockly.JavaScript.valueToCode(block, 'TEXT',
Blockly.JavaScript.ORDER_NONE) || '\'\'';
return varName + ' = String(' + varName + ') + String(' + argument0 + ');\n';
};
Blockly.JavaScript['text_length'] = function(block) {
// String length.
var argument0 = Blockly.JavaScript.valueToCode(block, 'VALUE',
Blockly.JavaScript.ORDER_FUNCTION_CALL) || '\'\'';
return [argument0 + '.length', Blockly.JavaScript.ORDER_MEMBER];
};
Blockly.JavaScript['text_isEmpty'] = function(block) {
// Is the string null?
var argument0 = Blockly.JavaScript.valueToCode(block, 'VALUE',
Blockly.JavaScript.ORDER_MEMBER) || '\'\'';
return ['!' + argument0, Blockly.JavaScript.ORDER_LOGICAL_NOT];
};
Blockly.JavaScript['text_indexOf'] = function(block) {
// Search the text for a substring.
var operator = block.getTitleValue('END') == 'FIRST' ?
'indexOf' : 'lastIndexOf';
var argument0 = Blockly.JavaScript.valueToCode(block, 'FIND',
Blockly.JavaScript.ORDER_NONE) || '\'\'';
var argument1 = Blockly.JavaScript.valueToCode(block, 'VALUE',
Blockly.JavaScript.ORDER_MEMBER) || '\'\'';
var code = argument1 + '.' + operator + '(' + argument0 + ') + 1';
return [code, Blockly.JavaScript.ORDER_MEMBER];
};
Blockly.JavaScript['text_charAt'] = function(block) {
// Get letter at index.
// Note: Until January 2013 this block did not have the WHERE input.
var where = block.getTitleValue('WHERE') || 'FROM_START';
var at = Blockly.JavaScript.valueToCode(block, 'AT',
Blockly.JavaScript.ORDER_UNARY_NEGATION) || '1';
var text = Blockly.JavaScript.valueToCode(block, 'VALUE',
Blockly.JavaScript.ORDER_MEMBER) || '\'\'';
switch (where) {
case 'FIRST':
var code = text + '.charAt(0)';
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
case 'LAST':
var code = text + '.slice(-1)';
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
case 'FROM_START':
// Blockly uses one-based indicies.
if (Blockly.isNumber(at)) {
// If the index is a naked number, decrement it right now.
at = parseFloat(at) - 1;
} else {
// If the index is dynamic, decrement it in code.
at += ' - 1';
}
var code = text + '.charAt(' + at + ')';
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
case 'FROM_END':
var code = text + '.slice(-' + at + ').charAt(0)';
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
case 'RANDOM':
if (!Blockly.JavaScript.definitions_['text_random_letter']) {
var functionName = Blockly.JavaScript.variableDB_.getDistinctName(
'text_random_letter', Blockly.Generator.NAME_TYPE);
Blockly.JavaScript.text_charAt.text_random_letter = functionName;
var func = [];
func.push('function ' + functionName + '(text) {');
func.push(' var x = Math.floor(Math.random() * text.length);');
func.push(' return text[x];');
func.push('}');
Blockly.JavaScript.definitions_['text_random_letter'] = func.join('\n');
}
code = Blockly.JavaScript.text_charAt.text_random_letter +
'(' + text + ')';
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
}
throw 'Unhandled option (text_charAt).';
};
Blockly.JavaScript['text_getSubstring'] = function(block) {
// Get substring.
var text = Blockly.JavaScript.valueToCode(block, 'STRING',
Blockly.JavaScript.ORDER_MEMBER) || '[]';
var where1 = block.getTitleValue('WHERE1');
var where2 = block.getTitleValue('WHERE2');
var at1 = Blockly.JavaScript.valueToCode(block, 'AT1',
Blockly.JavaScript.ORDER_NONE) || '1';
var at2 = Blockly.JavaScript.valueToCode(block, 'AT2',
Blockly.JavaScript.ORDER_NONE) || '1';
if (where1 == 'FIRST' && where2 == 'LAST') {
var code = text;
} else {
if (!Blockly.JavaScript.definitions_['text_get_substring']) {
var functionName = Blockly.JavaScript.variableDB_.getDistinctName(
'text_get_substring', Blockly.Generator.NAME_TYPE);
Blockly.JavaScript.text_getSubstring.func = functionName;
var func = [];
func.push('function ' + functionName +
'(text, where1, at1, where2, at2) {');
func.push(' function getAt(where, at) {');
func.push(' if (where == \'FROM_START\') {');
func.push(' at--;');
func.push(' } else if (where == \'FROM_END\') {');
func.push(' at = text.length - at;');
func.push(' } else if (where == \'FIRST\') {');
func.push(' at = 0;');
func.push(' } else if (where == \'LAST\') {');
func.push(' at = text.length - 1;');
func.push(' } else {');
func.push(' throw \'Unhandled option (text_getSubstring).\';');
func.push(' }');
func.push(' return at;');
func.push(' }');
func.push(' at1 = getAt(where1, at1);');
func.push(' at2 = getAt(where2, at2) + 1;');
func.push(' return text.slice(at1, at2);');
func.push('}');
Blockly.JavaScript.definitions_['text_get_substring'] =
func.join('\n');
}
var code = Blockly.JavaScript.text_getSubstring.func + '(' + text + ', \'' +
where1 + '\', ' + at1 + ', \'' + where2 + '\', ' + at2 + ')';
}
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
};
Blockly.JavaScript['text_changeCase'] = function(block) {
// Change capitalization.
var OPERATORS = {
UPPERCASE: '.toUpperCase()',
LOWERCASE: '.toLowerCase()',
TITLECASE: null
};
var operator = OPERATORS[block.getTitleValue('CASE')];
var code;
if (operator) {
// Upper and lower case are functions built into JavaScript.
var argument0 = Blockly.JavaScript.valueToCode(block, 'TEXT',
Blockly.JavaScript.ORDER_MEMBER) || '\'\'';
code = argument0 + operator;
} else {
if (!Blockly.JavaScript.definitions_['text_toTitleCase']) {
// Title case is not a native JavaScript function. Define one.
var functionName = Blockly.JavaScript.variableDB_.getDistinctName(
'text_toTitleCase', Blockly.Generator.NAME_TYPE);
Blockly.JavaScript.text_changeCase.toTitleCase = functionName;
var func = [];
func.push('function ' + functionName + '(str) {');
func.push(' return str.replace(/\\S+/g,');
func.push(' function(txt) {return txt[0].toUpperCase() + ' +
'txt.substring(1).toLowerCase();});');
func.push('}');
Blockly.JavaScript.definitions_['text_toTitleCase'] = func.join('\n');
}
var argument0 = Blockly.JavaScript.valueToCode(block, 'TEXT',
Blockly.JavaScript.ORDER_NONE) || '\'\'';
code = Blockly.JavaScript.text_changeCase.toTitleCase +
'(' + argument0 + ')';
}
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
};
Blockly.JavaScript['text_trim'] = function(block) {
// Trim spaces.
var OPERATORS = {
LEFT: '.trimLeft()',
RIGHT: '.trimRight()',
BOTH: '.trim()'
};
var operator = OPERATORS[block.getTitleValue('MODE')];
var argument0 = Blockly.JavaScript.valueToCode(block, 'TEXT',
Blockly.JavaScript.ORDER_MEMBER) || '\'\'';
return [argument0 + operator, Blockly.JavaScript.ORDER_FUNCTION_CALL];
};
Blockly.JavaScript['text_print'] = function(block) {
// Print statement.
var argument0 = Blockly.JavaScript.valueToCode(block, 'TEXT',
Blockly.JavaScript.ORDER_NONE) || '\'\'';
return 'window.alert(' + argument0 + ');\n';
};
Blockly.JavaScript['text_prompt'] = function(block) {
// Prompt function.
var msg = Blockly.JavaScript.quote_(block.getTitleValue('TEXT'));
var code = 'window.prompt(' + msg + ')';
var toNumber = block.getTitleValue('TYPE') == 'NUMBER';
if (toNumber) {
code = 'parseFloat(' + code + ')';
}
return [code, Blockly.JavaScript.ORDER_FUNCTION_CALL];
};

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/**
* Visual Blocks Language
*
* Copyright 2012 Google Inc.
* http://blockly.googlecode.com/
*
* 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 JavaScript for variable blocks.
* @author fraser@google.com (Neil Fraser)
*/
'use strict';
goog.provide('Blockly.JavaScript.variables');
goog.require('Blockly.JavaScript');
Blockly.JavaScript['variables_get'] = function(block) {
// Variable getter.
var code = Blockly.JavaScript.variableDB_.getName(block.getTitleValue('VAR'),
Blockly.Variables.NAME_TYPE);
return [code, Blockly.JavaScript.ORDER_ATOMIC];
};
Blockly.JavaScript['variables_set'] = function(block) {
// Variable setter.
var argument0 = Blockly.JavaScript.valueToCode(block, 'VALUE',
Blockly.JavaScript.ORDER_ASSIGNMENT) || '0';
var varName = Blockly.JavaScript.variableDB_.getName(
block.getTitleValue('VAR'), Blockly.Variables.NAME_TYPE);
return varName + ' = ' + argument0 + ';\n';
};