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https://github.com/google/blockly.git
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92 lines
2.9 KiB
JavaScript
92 lines
2.9 KiB
JavaScript
/**
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* Visual Blocks Language
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*
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* Copyright 2012 Google Inc.
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* http://blockly.googlecode.com/
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @fileoverview Generating Dart for logic blocks.
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* @author q.neutron@gmail.com (Quynh Neutron)
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*/
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'use strict';
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goog.provide('Blockly.Dart.logic');
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goog.require('Blockly.Dart');
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Blockly.Dart.logic_compare = function() {
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// Comparison operator.
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var mode = this.getTitleValue('OP');
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var operator = Blockly.Dart.logic_compare.OPERATORS[mode];
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var order = (operator == '==' || operator == '!=') ?
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Blockly.Dart.ORDER_EQUALITY : Blockly.Dart.ORDER_RELATIONAL;
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var argument0 = Blockly.Dart.valueToCode(this, 'A', order) || '0';
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var argument1 = Blockly.Dart.valueToCode(this, 'B', order) || '0';
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var code = argument0 + ' ' + operator + ' ' + argument1;
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return [code, order];
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};
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Blockly.Dart.logic_compare.OPERATORS = {
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EQ: '==',
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NEQ: '!=',
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LT: '<',
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LTE: '<=',
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GT: '>',
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GTE: '>='
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};
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Blockly.Dart.logic_operation = function() {
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// Operations 'and', 'or'.
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var operator = (this.getTitleValue('OP') == 'AND') ? '&&' : '||';
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var order = (operator == '&&') ? Blockly.Dart.ORDER_LOGICAL_AND :
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Blockly.Dart.ORDER_LOGICAL_OR;
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var argument0 = Blockly.Dart.valueToCode(this, 'A', order) || 'false';
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var argument1 = Blockly.Dart.valueToCode(this, 'B', order) || 'false';
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var code = argument0 + ' ' + operator + ' ' + argument1;
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return [code, order];
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};
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Blockly.Dart.logic_negate = function() {
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// Negation.
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var order = Blockly.Dart.ORDER_UNARY_PREFIX;
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var argument0 = Blockly.Dart.valueToCode(this, 'BOOL', order) || 'false';
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var code = '!' + argument0;
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return [code, order];
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};
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Blockly.Dart.logic_boolean = function() {
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// Boolean values true and false.
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var code = (this.getTitleValue('BOOL') == 'TRUE') ? 'true' : 'false';
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return [code, Blockly.Dart.ORDER_ATOMIC];
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};
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Blockly.Dart.logic_null = function() {
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// Null data type.
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return ['null', Blockly.Dart.ORDER_ATOMIC];
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};
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Blockly.Dart.logic_ternary = function() {
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// Ternary operator.
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var value_if = Blockly.Dart.valueToCode(this, 'IF',
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Blockly.Dart.ORDER_CONDITIONAL) || 'false';
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var value_then = Blockly.Dart.valueToCode(this, 'THEN',
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Blockly.Dart.ORDER_CONDITIONAL) || 'null';
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var value_else = Blockly.Dart.valueToCode(this, 'ELSE',
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Blockly.Dart.ORDER_CONDITIONAL) || 'null';
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var code = value_if + ' ? ' + value_then + ' : ' + value_else
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return [code, Blockly.Dart.ORDER_CONDITIONAL];
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};
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