src/editor/modules/documentCanvas/canvas/elementsRegister.js

   1 define(function(require) {
   2
   3 'use strict';
   4 var _ = require('libs/underscore'),
   5     wlxml = require('wlxml/wlxml');
   6
   7
   8 var ElementsRegister = function(basePrototype, defaultPrototype) {
   9     this._register = {};
  10     this.basePrototype = basePrototype;
  11     this.DefaultType = this.createCanvasElementType(defaultPrototype);
  12 };
  13
  14 _.extend(ElementsRegister.prototype, {
  15     createCanvasElementType: function(elementPrototype, extending) {
  16         var inheritFrom = this.basePrototype;
  17         if(extending && extending.tag) {
  18             inheritFrom = this.getElement(extending);
  19         }
  20         var Constructor = function() {
  21             if(!this.super) {
  22                 this.super = inheritFrom.prototype;
  23             }
  24             inheritFrom.apply(this, Array.prototype.slice.call(arguments, 0));
  25
  26         };
  27         Constructor.prototype = Object.create(inheritFrom.prototype);
  28         _.extend(Constructor.prototype, elementPrototype);
  29         return Constructor;
  30     },
  31     register: function(params) {
  32         params.klass = params.klass || '';
  33         params.prototype = params.prototype || Object.create({});
  34
  35         this._register[params.tag] = this._register[params.tag] || {};
  36         this._register[params.tag][params.klass] = this.createCanvasElementType(params.prototype, params.extending);
  37     },
  38     getElement: function(params) {
  39         params.klass = params.klass || '';
  40         var Factory;
  41         if(this._register[params.tag]) {
  42             wlxml.getClassHierarchy(params.klass).reverse().some(function(klass) {
  43                 Factory = this._register[params.tag][klass];
  44                 if(Factory) {
  45                     return true;
  46                 }
  47             }.bind(this));
  48         }
  49         if(!Factory) {
  50             Factory = this.DefaultType;
  51         }
  52         return Factory;
  53     }
  54 });
  55
  56
  57 return ElementsRegister;
  58
  59 });