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(BaseType, NullType) {
   9     this._register = {};
  10     this.BaseType = BaseType;
  11     this.NullType = NullType;
  12 };
  13
  14 _.extend(ElementsRegister.prototype, {
  15     createCanvasElementType: function(elementPrototype) {
  16         var register = this;
  17         var Constructor = function() {
  18             register.BaseType.apply(this, Array.prototype.slice.call(arguments, 0));
  19         };
  20         Constructor.prototype = elementPrototype;
  21         return Constructor;
  22     },
  23     register: function(params) {
  24         params.klass = params.klass || '';
  25         params.prototype = params.prototype || this.NullType;
  26
  27         this._register[params.tag] = this._register[params.tag] || {};
  28         this._register[params.tag][params.klass] = this.createCanvasElementType(params.prototype);
  29     },
  30     getElement: function(params) {
  31         params.klass = params.klass || '';
  32         var Factory;
  33         if(this._register[params.tag]) {
  34             wlxml.getClassHierarchy(params.klass).reverse().some(function(klass) {
  35                 Factory = this._register[params.tag][klass];
  36                 if(Factory) {
  37                     return true;
  38                 }
  39             }.bind(this));
  40         }
  41         if(!Factory) {
  42             Factory = this.BaseType;
  43         }
  44         return Factory;
  45     }
  46 });
  47
  48
  49 return ElementsRegister;
  50
  51 });