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306eb80216
* refactor(generators): Introduce class JavascriptGenerator Also fix an import ordering error. * refactor(generators): Use Order.* instead of .ORDER_* * refactor(generators): Don't rename javascriptGenerator
86 lines
3.2 KiB
JavaScript
86 lines
3.2 KiB
JavaScript
/**
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* @license
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* Copyright 2012 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 JavaScript for colour blocks.
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*/
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import * as goog from '../../closure/goog/goog.js';
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goog.declareModuleId('Blockly.JavaScript.colour');
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import {Order, javascriptGenerator} from '../javascript.js';
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javascriptGenerator.forBlock['colour_picker'] = function(block) {
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// Colour picker.
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const code = javascriptGenerator.quote_(block.getFieldValue('COLOUR'));
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return [code, Order.ATOMIC];
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};
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javascriptGenerator.forBlock['colour_random'] = function(block) {
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// Generate a random colour.
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const functionName = javascriptGenerator.provideFunction_('colourRandom', `
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function ${javascriptGenerator.FUNCTION_NAME_PLACEHOLDER_}() {
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var num = Math.floor(Math.random() * Math.pow(2, 24));
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return '#' + ('00000' + num.toString(16)).substr(-6);
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}
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`);
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const code = functionName + '()';
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return [code, Order.FUNCTION_CALL];
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};
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javascriptGenerator.forBlock['colour_rgb'] = function(block) {
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// Compose a colour from RGB components expressed as percentages.
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const red = javascriptGenerator.valueToCode(block, 'RED', Order.NONE) || 0;
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const green =
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javascriptGenerator.valueToCode(block, 'GREEN', Order.NONE) || 0;
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const blue =
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javascriptGenerator.valueToCode(block, 'BLUE', Order.NONE) || 0;
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const functionName = javascriptGenerator.provideFunction_('colourRgb', `
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function ${javascriptGenerator.FUNCTION_NAME_PLACEHOLDER_}(r, g, b) {
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r = Math.max(Math.min(Number(r), 100), 0) * 2.55;
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g = Math.max(Math.min(Number(g), 100), 0) * 2.55;
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b = Math.max(Math.min(Number(b), 100), 0) * 2.55;
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r = ('0' + (Math.round(r) || 0).toString(16)).slice(-2);
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g = ('0' + (Math.round(g) || 0).toString(16)).slice(-2);
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b = ('0' + (Math.round(b) || 0).toString(16)).slice(-2);
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return '#' + r + g + b;
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}
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`);
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const code = functionName + '(' + red + ', ' + green + ', ' + blue + ')';
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return [code, Order.FUNCTION_CALL];
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};
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javascriptGenerator.forBlock['colour_blend'] = function(block) {
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// Blend two colours together.
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const c1 = javascriptGenerator.valueToCode(block, 'COLOUR1', Order.NONE) ||
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"'#000000'";
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const c2 = javascriptGenerator.valueToCode(block, 'COLOUR2', Order.NONE) ||
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"'#000000'";
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const ratio =
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javascriptGenerator.valueToCode(block, 'RATIO', Order.NONE) || 0.5;
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const functionName = javascriptGenerator.provideFunction_('colourBlend', `
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function ${javascriptGenerator.FUNCTION_NAME_PLACEHOLDER_}(c1, c2, ratio) {
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ratio = Math.max(Math.min(Number(ratio), 1), 0);
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var r1 = parseInt(c1.substring(1, 3), 16);
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var g1 = parseInt(c1.substring(3, 5), 16);
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var b1 = parseInt(c1.substring(5, 7), 16);
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var r2 = parseInt(c2.substring(1, 3), 16);
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var g2 = parseInt(c2.substring(3, 5), 16);
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var b2 = parseInt(c2.substring(5, 7), 16);
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var r = Math.round(r1 * (1 - ratio) + r2 * ratio);
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var g = Math.round(g1 * (1 - ratio) + g2 * ratio);
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var b = Math.round(b1 * (1 - ratio) + b2 * ratio);
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r = ('0' + (r || 0).toString(16)).slice(-2);
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g = ('0' + (g || 0).toString(16)).slice(-2);
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b = ('0' + (b || 0).toString(16)).slice(-2);
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return '#' + r + g + b;
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}
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`);
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const code = functionName + '(' + c1 + ', ' + c2 + ', ' + ratio + ')';
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return [code, Order.FUNCTION_CALL];
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};
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