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1f6a1bd8d9
* Unindent CSS, save 3 kb of code. * Convert generator functions to template strings. This resolves #5761.
106 lines
3.5 KiB
JavaScript
106 lines
3.5 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.module('Blockly.Dart.colour');
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const Dart = goog.require('Blockly.Dart');
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Dart.addReservedWords('Math');
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Dart['colour_picker'] = function(block) {
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// Colour picker.
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const code = Dart.quote_(block.getFieldValue('COLOUR'));
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return [code, Dart.ORDER_ATOMIC];
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};
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Dart['colour_random'] = function(block) {
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// Generate a random colour.
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Dart.definitions_['import_dart_math'] = "import 'dart:math' as Math;";
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const functionName = Dart.provideFunction_('colour_random', `
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String ${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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`);
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const code = functionName + '()';
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return [code, Dart.ORDER_UNARY_POSTFIX];
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};
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Dart['colour_rgb'] = function(block) {
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// Compose a colour from RGB components expressed as percentages.
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const red = Dart.valueToCode(block, 'RED',
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Dart.ORDER_NONE) || 0;
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const green = Dart.valueToCode(block, 'GREEN',
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Dart.ORDER_NONE) || 0;
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const blue = Dart.valueToCode(block, 'BLUE',
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Dart.ORDER_NONE) || 0;
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Dart.definitions_['import_dart_math'] = "import 'dart:math' as Math;";
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const functionName = Dart.provideFunction_('colour_rgb', `
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String ${Dart.FUNCTION_NAME_PLACEHOLDER_}(num r, num g, num b) {
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num rn = (Math.max(Math.min(r, 100), 0) * 2.55).round();
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String rs = rn.toInt().toRadixString(16);
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rs = '0$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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`);
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const code = functionName + '(' + red + ', ' + green + ', ' + blue + ')';
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return [code, Dart.ORDER_UNARY_POSTFIX];
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};
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Dart['colour_blend'] = function(block) {
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// Blend two colours together.
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const c1 = Dart.valueToCode(block, 'COLOUR1', Dart.ORDER_NONE) || "'#000000'";
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const c2 = Dart.valueToCode(block, 'COLOUR2', Dart.ORDER_NONE) || "'#000000'";
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const ratio = Dart.valueToCode(block, 'RATIO', Dart.ORDER_NONE) || 0.5;
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Dart.definitions_['import_dart_math'] = "import 'dart:math' as Math;";
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const functionName = Dart.provideFunction_('colour_blend', `
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String ${Dart.FUNCTION_NAME_PLACEHOLDER_}(String c1, String c2, num ratio) {
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ratio = Math.max(Math.min(ratio, 1), 0);
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int r1 = int.parse('0x\${c1.substring(1, 3)}');
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int g1 = int.parse('0x\${c1.substring(3, 5)}');
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int b1 = int.parse('0x\${c1.substring(5, 7)}');
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int r2 = int.parse('0x\${c2.substring(1, 3)}');
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int g2 = int.parse('0x\${c2.substring(3, 5)}');
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int b2 = int.parse('0x\${c2.substring(5, 7)}');
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num rn = (r1 * (1 - ratio) + r2 * ratio).round();
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String rs = rn.toInt().toRadixString(16);
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num gn = (g1 * (1 - ratio) + g2 * ratio).round();
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String gs = gn.toInt().toRadixString(16);
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num bn = (b1 * (1 - ratio) + b2 * ratio).round();
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String bs = bn.toInt().toRadixString(16);
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rs = '0$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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`);
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const code = functionName + '(' + c1 + ', ' + c2 + ', ' + ratio + ')';
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return [code, Dart.ORDER_UNARY_POSTFIX];
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};
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