mirror of
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90b3f75d82
Our files are up to a decade old, and have churned so much, that the initial author of the file no longer has much meaning. Furthermore, this will encourage developers to post to the developer group, rather than emailing Googlers (usually me) directly.
114 lines
4.3 KiB
JavaScript
114 lines
4.3 KiB
JavaScript
/**
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* @license
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* Copyright 2014 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @fileoverview Generating Dart for colour blocks.
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*/
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'use strict';
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goog.provide('Blockly.Dart.colour');
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goog.require('Blockly.Dart');
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Blockly.Dart.addReservedWords('Math');
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Blockly.Dart['colour_picker'] = function(block) {
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// Colour picker.
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var code = Blockly.Dart.quote_(block.getFieldValue('COLOUR'));
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return [code, Blockly.Dart.ORDER_ATOMIC];
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};
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Blockly.Dart['colour_random'] = function(block) {
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// Generate a random colour.
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Blockly.Dart.definitions_['import_dart_math'] =
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'import \'dart:math\' as Math;';
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var functionName = Blockly.Dart.provideFunction_(
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'colour_random',
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['String ' + Blockly.Dart.FUNCTION_NAME_PLACEHOLDER_ + '() {',
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' String hex = \'0123456789abcdef\';',
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' var rnd = new Math.Random();',
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' return \'#${hex[rnd.nextInt(16)]}${hex[rnd.nextInt(16)]}\'',
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' \'${hex[rnd.nextInt(16)]}${hex[rnd.nextInt(16)]}\'',
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' \'${hex[rnd.nextInt(16)]}${hex[rnd.nextInt(16)]}\';',
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'}']);
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var code = functionName + '()';
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return [code, Blockly.Dart.ORDER_UNARY_POSTFIX];
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};
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Blockly.Dart['colour_rgb'] = function(block) {
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// Compose a colour from RGB components expressed as percentages.
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var red = Blockly.Dart.valueToCode(block, 'RED',
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Blockly.Dart.ORDER_NONE) || 0;
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var green = Blockly.Dart.valueToCode(block, 'GREEN',
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Blockly.Dart.ORDER_NONE) || 0;
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var blue = Blockly.Dart.valueToCode(block, 'BLUE',
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Blockly.Dart.ORDER_NONE) || 0;
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Blockly.Dart.definitions_['import_dart_math'] =
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'import \'dart:math\' as Math;';
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var functionName = Blockly.Dart.provideFunction_(
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'colour_rgb',
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['String ' + Blockly.Dart.FUNCTION_NAME_PLACEHOLDER_ +
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'(num r, num g, num b) {',
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' num rn = (Math.max(Math.min(r, 100), 0) * 2.55).round();',
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' String rs = rn.toInt().toRadixString(16);',
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' rs = \'0$rs\';',
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' rs = rs.substring(rs.length - 2);',
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' num gn = (Math.max(Math.min(g, 100), 0) * 2.55).round();',
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' String gs = gn.toInt().toRadixString(16);',
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' gs = \'0$gs\';',
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' gs = gs.substring(gs.length - 2);',
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' num bn = (Math.max(Math.min(b, 100), 0) * 2.55).round();',
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' String bs = bn.toInt().toRadixString(16);',
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' bs = \'0$bs\';',
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' bs = bs.substring(bs.length - 2);',
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' return \'#$rs$gs$bs\';',
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'}']);
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var code = functionName + '(' + red + ', ' + green + ', ' + blue + ')';
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return [code, Blockly.Dart.ORDER_UNARY_POSTFIX];
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};
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Blockly.Dart['colour_blend'] = function(block) {
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// Blend two colours together.
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var c1 = Blockly.Dart.valueToCode(block, 'COLOUR1',
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Blockly.Dart.ORDER_NONE) || '\'#000000\'';
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var c2 = Blockly.Dart.valueToCode(block, 'COLOUR2',
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Blockly.Dart.ORDER_NONE) || '\'#000000\'';
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var ratio = Blockly.Dart.valueToCode(block, 'RATIO',
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Blockly.Dart.ORDER_NONE) || 0.5;
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Blockly.Dart.definitions_['import_dart_math'] =
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'import \'dart:math\' as Math;';
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var functionName = Blockly.Dart.provideFunction_(
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'colour_blend',
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['String ' + Blockly.Dart.FUNCTION_NAME_PLACEHOLDER_ +
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'(String c1, String c2, num ratio) {',
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' ratio = Math.max(Math.min(ratio, 1), 0);',
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' int r1 = int.parse(\'0x${c1.substring(1, 3)}\');',
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' int g1 = int.parse(\'0x${c1.substring(3, 5)}\');',
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' int b1 = int.parse(\'0x${c1.substring(5, 7)}\');',
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' int r2 = int.parse(\'0x${c2.substring(1, 3)}\');',
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' int g2 = int.parse(\'0x${c2.substring(3, 5)}\');',
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' int b2 = int.parse(\'0x${c2.substring(5, 7)}\');',
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' num rn = (r1 * (1 - ratio) + r2 * ratio).round();',
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' String rs = rn.toInt().toRadixString(16);',
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' num gn = (g1 * (1 - ratio) + g2 * ratio).round();',
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' String gs = gn.toInt().toRadixString(16);',
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' num bn = (b1 * (1 - ratio) + b2 * ratio).round();',
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' String bs = bn.toInt().toRadixString(16);',
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' rs = \'0$rs\';',
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' rs = rs.substring(rs.length - 2);',
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' gs = \'0$gs\';',
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' gs = gs.substring(gs.length - 2);',
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' bs = \'0$bs\';',
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' bs = bs.substring(bs.length - 2);',
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' return \'#$rs$gs$bs\';',
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'}']);
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var code = functionName + '(' + c1 + ', ' + c2 + ', ' + ratio + ')';
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return [code, Blockly.Dart.ORDER_UNARY_POSTFIX];
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};
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