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/**
* @license
* Visual Blocks Language
*
* Copyright 2014 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 Dart for colour blocks.
* @author fraser@google.com (Neil Fraser)
*/
'use strict';
goog.provide('Blockly.Dart.colour');
goog.require('Blockly.Dart');
Blockly.Dart.addReservedWords('Math');
Blockly.Dart['colour_picker'] = function(block) {
// Colour picker.
var code = '\'' + block.getFieldValue('COLOUR') + '\'';
return [code, Blockly.Dart.ORDER_ATOMIC];
};
Blockly.Dart['colour_random'] = function(block) {
// Generate a random colour.
Blockly.Dart.definitions_['import_dart_math'] =
'import \'dart:math\' as Math;';
var functionName = Blockly.Dart.provideFunction_(
'colour_random',
['String ' + Blockly.Dart.FUNCTION_NAME_PLACEHOLDER_ + '() {',
' String hex = \'0123456789abcdef\';',
' var rnd = new Math.Random();',
' return \'#${hex[rnd.nextInt(16)]}${hex[rnd.nextInt(16)]}\'',
' \'${hex[rnd.nextInt(16)]}${hex[rnd.nextInt(16)]}\'',
' \'${hex[rnd.nextInt(16)]}${hex[rnd.nextInt(16)]}\';',
'}']);
var code = functionName + '()';
return [code, Blockly.Dart.ORDER_UNARY_POSTFIX];
};
Blockly.Dart['colour_rgb'] = function(block) {
// Compose a colour from RGB components expressed as percentages.
var red = Blockly.Dart.valueToCode(block, 'RED',
Blockly.Dart.ORDER_NONE) || 0;
var green = Blockly.Dart.valueToCode(block, 'GREEN',
Blockly.Dart.ORDER_NONE) || 0;
var blue = Blockly.Dart.valueToCode(block, 'BLUE',
Blockly.Dart.ORDER_NONE) || 0;
Blockly.Dart.definitions_['import_dart_math'] =
'import \'dart:math\' as Math;';
var functionName = Blockly.Dart.provideFunction_(
'colour_rgb',
['String ' + Blockly.Dart.FUNCTION_NAME_PLACEHOLDER_ +
'(num r, num g, num b) {',
' num rn = (Math.max(Math.min(r, 1), 0) * 255).round();',
' String rs = rn.toInt().toRadixString(16);',
' rs = \'0$rs\';',
' rs = rs.substring(rs.length - 2);',
' num gn = (Math.max(Math.min(g, 1), 0) * 255).round();',
' String gs = gn.toInt().toRadixString(16);',
' gs = \'0$gs\';',
' gs = gs.substring(gs.length - 2);',
' num bn = (Math.max(Math.min(b, 1), 0) * 255).round();',
' String bs = bn.toInt().toRadixString(16);',
' bs = \'0$bs\';',
' bs = bs.substring(bs.length - 2);',
' return \'#$rs$gs$bs\';',
'}']);
var code = functionName + '(' + red + ', ' + green + ', ' + blue + ')';
return [code, Blockly.Dart.ORDER_UNARY_POSTFIX];
};
Blockly.Dart['colour_blend'] = function(block) {
// Blend two colours together.
var c1 = Blockly.Dart.valueToCode(block, 'COLOUR1',
Blockly.Dart.ORDER_NONE) || '\'#000000\'';
var c2 = Blockly.Dart.valueToCode(block, 'COLOUR2',
Blockly.Dart.ORDER_NONE) || '\'#000000\'';
var ratio = Blockly.Dart.valueToCode(block, 'RATIO',
Blockly.Dart.ORDER_NONE) || 0.5;
Blockly.Dart.definitions_['import_dart_math'] =
'import \'dart:math\' as Math;';
var functionName = Blockly.Dart.provideFunction_(
'colour_blend',
['String ' + Blockly.Dart.FUNCTION_NAME_PLACEHOLDER_ +
'(String c1, String c2, num ratio) {',
' ratio = Math.max(Math.min(ratio, 1), 0);',
' int r1 = int.parse(\'0x${c1.substring(1, 3)}\');',
' int g1 = int.parse(\'0x${c1.substring(3, 5)}\');',
' int b1 = int.parse(\'0x${c1.substring(5, 7)}\');',
' int r2 = int.parse(\'0x${c2.substring(1, 3)}\');',
' int g2 = int.parse(\'0x${c2.substring(3, 5)}\');',
' int b2 = int.parse(\'0x${c2.substring(5, 7)}\');',
' num rn = (r1 * (1 - ratio) + r2 * ratio).round();',
' String rs = rn.toInt().toRadixString(16);',
' num gn = (g1 * (1 - ratio) + g2 * ratio).round();',
' String gs = gn.toInt().toRadixString(16);',
' num bn = (b1 * (1 - ratio) + b2 * ratio).round();',
' String bs = bn.toInt().toRadixString(16);',
' rs = \'0$rs\';',
' rs = rs.substring(rs.length - 2);',
' gs = \'0$gs\';',
' gs = gs.substring(gs.length - 2);',
' bs = \'0$bs\';',
' bs = bs.substring(bs.length - 2);',
' return \'#$rs$gs$bs\';',
'}']);
var code = functionName + '(' + c1 + ', ' + c2 + ', ' + ratio + ')';
return [code, Blockly.Dart.ORDER_UNARY_POSTFIX];
};
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