mirror of
https://github.com/google/blockly.git
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a5d3f340e5
This is based on the JS generator, with a lot of inspiration from Ellen Spertus's blockly-lua: https://github.com/espertus/blockly-lua All unit tests pass with Lua 5.3.2.
91 lines
3.5 KiB
JavaScript
91 lines
3.5 KiB
JavaScript
/**
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* @license
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* Visual Blocks Language
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*
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* Copyright 2016 Google Inc.
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* https://developers.google.com/blockly/
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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 Lua for colour blocks.
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* @author rodrigoq@google.com (Rodrigo Queiro)
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*/
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'use strict';
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goog.provide('Blockly.Lua.colour');
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goog.require('Blockly.Lua');
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Blockly.Lua['colour_picker'] = function(block) {
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// Colour picker.
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var code = '\'' + block.getFieldValue('COLOUR') + '\'';
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return [code, Blockly.Lua.ORDER_ATOMIC];
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};
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Blockly.Lua['colour_random'] = function(block) {
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// Generate a random colour.
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var code = 'string.format("#%06x", math.random(0, 2^24 - 1))';
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return [code, Blockly.Lua.ORDER_HIGH];
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};
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Blockly.Lua['colour_rgb'] = function(block) {
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// Compose a colour from RGB components expressed as percentages.
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var functionName = Blockly.Lua.provideFunction_(
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'colour_rgb',
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['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ + '(r, g, b)',
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' r = math.floor(math.min(100, math.max(0, r)) * 2.55 + .5)',
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' g = math.floor(math.min(100, math.max(0, g)) * 2.55 + .5)',
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' b = math.floor(math.min(100, math.max(0, b)) * 2.55 + .5)',
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' return string.format("#%02x%02x%02x", r, g, b)',
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'end']);
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var r = Blockly.Lua.valueToCode(block, 'RED',
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Blockly.Lua.ORDER_NONE) || 0;
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var g = Blockly.Lua.valueToCode(block, 'GREEN',
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Blockly.Lua.ORDER_NONE) || 0;
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var b = Blockly.Lua.valueToCode(block, 'BLUE',
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Blockly.Lua.ORDER_NONE) || 0;
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var code = functionName + '(' + r + ', ' + g + ', ' + b + ')';
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return [code, Blockly.Lua.ORDER_HIGH];
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};
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Blockly.Lua['colour_blend'] = function(block) {
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// Blend two colours together.
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var functionName = Blockly.Lua.provideFunction_(
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'colour_blend',
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['function ' + Blockly.Lua.FUNCTION_NAME_PLACEHOLDER_ +
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'(colour1, colour2, ratio)',
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' local r1 = tonumber(string.sub(colour1, 2, 3), 16)',
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' local r2 = tonumber(string.sub(colour2, 2, 3), 16)',
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' local g1 = tonumber(string.sub(colour1, 4, 5), 16)',
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' local g2 = tonumber(string.sub(colour2, 4, 5), 16)',
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' local b1 = tonumber(string.sub(colour1, 6, 7), 16)',
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' local b2 = tonumber(string.sub(colour2, 6, 7), 16)',
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' local ratio = math.min(1, math.max(0, ratio))',
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' local r = math.floor(r1 * (1 - ratio) + r2 * ratio + .5)',
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' local g = math.floor(g1 * (1 - ratio) + g2 * ratio + .5)',
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' local b = math.floor(b1 * (1 - ratio) + b2 * ratio + .5)',
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' return string.format("#%02x%02x%02x", r, g, b)',
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'end']);
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var colour1 = Blockly.Lua.valueToCode(block, 'COLOUR1',
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Blockly.Lua.ORDER_NONE) || '\'#000000\'';
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var colour2 = Blockly.Lua.valueToCode(block, 'COLOUR2',
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Blockly.Lua.ORDER_NONE) || '\'#000000\'';
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var ratio = Blockly.Lua.valueToCode(block, 'RATIO',
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Blockly.Lua.ORDER_NONE) || 0;
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var code = functionName + '(' + colour1 + ', ' + colour2 + ', ' + ratio + ')';
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return [code, Blockly.Lua.ORDER_HIGH];
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};
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