text: /**
   * 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 logic generator blocks for EasyLab4Kids.
   * @author thebapodcast@gmail.com  (Michiel Erasmus)  https://www.facebook.com/EasyBlocks4Kids/
   */
  'use strict';
  
  goog.provide('Blockly.Arduino.logic');
  
  goog.require('Blockly.Arduino');
  
  Blockly.Arduino.controls_if = function() {
      // If/elseif/else condition.
      var n = 0;
      var argument = Blockly.Arduino.valueToCode(this, 'IF' + n,
          Blockly.Arduino.ORDER_NONE) || 'false';
      var branch = Blockly.Arduino.statementToCode(this, 'DO' + n);
      var code = 'if (' + argument + ') {\n' + branch + '\n}';
      for (n = 1; n <= this.elseifCount_; n++) {
          argument = Blockly.Arduino.valueToCode(this, 'IF' + n,
              Blockly.Arduino.ORDER_NONE) || 'false';
          branch = Blockly.Arduino.statementToCode(this, 'DO' + n);
          code += ' else if (' + argument + ') {\n' + branch + '}';
      }
      if (this.elseCount_) {
          branch = Blockly.Arduino.statementToCode(this, 'ELSE');
          code += ' else {\n' + branch + '\n}';
      }
      return code + '\n';
  };
  
  Blockly.Arduino.logic_compare = function() {
      // Comparison operator.
      var mode = this.getFieldValue('OP');
      var operator = Blockly.Arduino.logic_compare.OPERATORS[mode];
      var order = (operator == '==' || operator == '!=') ?
          Blockly.Arduino.ORDER_EQUALITY : Blockly.Arduino.ORDER_RELATIONAL;
      var argument0 = Blockly.Arduino.valueToCode(this, 'A', order) || '0';
      var argument1 = Blockly.Arduino.valueToCode(this, 'B', order) || '0';
      var code = argument0 + ' ' + operator + ' ' + argument1;
      return [code, order];
  };
  
  Blockly.Arduino.logic_compare.OPERATORS = {
      EQ: '==',
      NEQ: '!=',
      LT: '<',
      LTE: '<=',
      GT: '>',
      GTE: '>='
  };
  
  Blockly.Arduino.logic_operation = function() {
      // Operations 'and', 'or'.
      var operator = (this.getFieldValue('OP') == 'AND') ? '&&' : '||';
      var order = (operator == '&&') ? Blockly.Arduino.ORDER_LOGICAL_AND :
          Blockly.Arduino.ORDER_LOGICAL_OR;
      var argument0 = Blockly.Arduino.valueToCode(this, 'A', order) || 'false';
      var argument1 = Blockly.Arduino.valueToCode(this, 'B', order) || 'false';
      var code = argument0 + ' ' + operator + ' ' + argument1;
      return [code, order];
  };
  
  Blockly.Arduino.logic_negate = function() {
      // Negation.
      var order = Blockly.Arduino.ORDER_UNARY_PREFIX;
      var argument0 = Blockly.Arduino.valueToCode(this, 'BOOL', order) || 'false';
      var code = '!' + argument0;
      return [code, order];
  };
  
  Blockly.Arduino.logic_boolean = function() {
      // Boolean values true and false.
      var code = (this.getFieldValue('BOOL') == 'TRUE') ? 'true' : 'false';
      return [code, Blockly.Arduino.ORDER_ATOMIC];
  };
  
  Blockly.Arduino.logic_null = function() {
      var code = 'NULL';
      return [code, Blockly.Arduino.ORDER_ATOMIC];
  };