Create a Renderer base class and extend it for each type of renderer

core/renderers/zelos/renderer.js

@@ -0,0 +1,48 @@
+/**
+ * @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 Zelos renderer.
+ * @author fenichel@google.com (Rachel Fenichel)
+ */
+'use strict';
+
+goog.provide('Blockly.zelos.Renderer');
+
+goog.require('Blockly.blockRendering.Renderer');
+goog.require('Blockly.zelos.ConstantProvider');
+goog.require('Blockly.blockRendering.Debug');
+goog.require('Blockly.zelos.Drawer');
+goog.require('Blockly.zelos.RenderInfo');
+
+/**
+ * The zelos renderer.
+ * @package
+ * @constructor
+ * @extends {Blockly.blockRendering.Renderer}
+ */
+Blockly.zelos.Renderer = function() {
+  this.constantProvider = Blockly.zelos.ConstantProvider;
+  this.renderInfo = Blockly.zelos.RenderInfo;
+  this.drawer = Blockly.zelos.Drawer;
+  this.debugger = Blockly.blockRendering.Debug;
+};
+goog.inherits(Blockly.zelos.Renderer, Blockly.blockRendering.Renderer);
+