mirror of
https://github.com/google/blockly.git
synced 2026-01-10 02:17:09 +01:00
e339ae26bc
* Move the rendering object onto the workspace allowing the various workspaces to have different renderers.
124 lines
3.5 KiB
JavaScript
124 lines
3.5 KiB
JavaScript
/**
|
|
* @license
|
|
* Visual Blocks Editor
|
|
*
|
|
* Copyright 2019 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 Base renderer.
|
|
* @author fenichel@google.com (Rachel Fenichel)
|
|
*/
|
|
'use strict';
|
|
|
|
goog.provide('Blockly.blockRendering.Renderer');
|
|
|
|
goog.require('Blockly.blockRendering.ConstantProvider');
|
|
goog.require('Blockly.blockRendering.Debug');
|
|
goog.require('Blockly.blockRendering.Drawer');
|
|
goog.require('Blockly.blockRendering.RenderInfo');
|
|
|
|
|
|
/**
|
|
* The base class for a block renderer.
|
|
* @package
|
|
* @constructor
|
|
*/
|
|
Blockly.blockRendering.Renderer = function() {
|
|
|
|
/**
|
|
* The renderer's constant provider.
|
|
* @type {Blockly.blockRendering.ConstantProvider}
|
|
* @private
|
|
*/
|
|
this.constants_ = null;
|
|
};
|
|
|
|
/**
|
|
* Initialize the renderer
|
|
* @package
|
|
*/
|
|
Blockly.blockRendering.Renderer.prototype.init = function() {
|
|
this.constants_ = this.makeConstants_();
|
|
this.constants_.init();
|
|
};
|
|
|
|
/**
|
|
* Create a new instance of the renderer's constant provider.
|
|
* @return {!Blockly.blockRendering.ConstantProvider} The constant provider.
|
|
* @protected
|
|
*/
|
|
Blockly.blockRendering.Renderer.prototype.makeConstants_ = function() {
|
|
return new Blockly.blockRendering.ConstantProvider();
|
|
};
|
|
|
|
/**
|
|
* Create a new instance of the renderer's render info object.
|
|
* @param {!Blockly.BlockSvg} block The block to measure.
|
|
* @return {!Blockly.blockRendering.RenderInfo} The render info object.
|
|
* @protected
|
|
*/
|
|
Blockly.blockRendering.Renderer.prototype.makeRenderInfo_ = function(block) {
|
|
return new Blockly.blockRendering.RenderInfo(this, block);
|
|
};
|
|
|
|
/**
|
|
* Create a new instance of the renderer's drawer.
|
|
* @param {!Blockly.BlockSvg} block The block to render.
|
|
* @param {!Blockly.blockRendering.RenderInfo} info An object containing all
|
|
* information needed to render this block.
|
|
* @return {!Blockly.blockRendering.Drawer} The drawer.
|
|
* @protected
|
|
*/
|
|
Blockly.blockRendering.Renderer.prototype.makeDrawer_ = function(block, info) {
|
|
return new Blockly.blockRendering.Drawer(block, info);
|
|
};
|
|
|
|
/**
|
|
* Create a new instance of the renderer's debugger.
|
|
* @return {!Blockly.blockRendering.Debug} The renderer debugger.
|
|
* @protected
|
|
*/
|
|
Blockly.blockRendering.Renderer.prototype.makeDebugger_ = function() {
|
|
return new Blockly.blockRendering.Debug();
|
|
};
|
|
|
|
/**
|
|
* Get the current renderer's constant provider. We assume that when this is
|
|
* called, the renderer has already been initialized.
|
|
* @return {!Blockly.blockRendering.ConstantProvider} The constant provider.
|
|
* @package
|
|
*/
|
|
Blockly.blockRendering.Renderer.prototype.getConstants = function() {
|
|
return (
|
|
/** @type {!Blockly.blockRendering.ConstantProvider} */
|
|
(this.constants_));
|
|
};
|
|
|
|
/**
|
|
* Render the block.
|
|
* @param {!Blockly.BlockSvg} block The block to render.
|
|
* @package
|
|
*/
|
|
Blockly.blockRendering.Renderer.prototype.render = function(block) {
|
|
if (!block.renderingDebugger) {
|
|
block.renderingDebugger = this.makeDebugger_();
|
|
}
|
|
var info = this.makeRenderInfo_(block);
|
|
info.measure();
|
|
this.makeDrawer_(block, info).draw();
|
|
};
|