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

   1 define([
   2 'libs/jquery',
   3 'modules/documentCanvas/canvas/utils',
   4 ], function($, utils) {
   5
   6 'use strict';
   7
   8 var Listener = function(canvas) {
   9     this.canvas = canvas;
  10 };
  11
  12 $.extend(Listener.prototype, {
  13     listenTo: function(wlxmlDocument) {
  14         if(wlxmlDocument === this.wlxmlDocument) {
  15             return;
  16         }
  17         this.wlxmlDocument = wlxmlDocument;
  18
  19         wlxmlDocument.on('change', function(event) {
  20             var handler = handlers[event.type];
  21             if(handler) {
  22                 handler.bind(this)(event);
  23             }
  24         }, this);
  25
  26         wlxmlDocument.on('contentSet', function() {
  27             this.canvas.loadWlxmlDocument(wlxmlDocument);
  28         }, this);
  29     }
  30 });
  31
  32 var handlers = {
  33     nodeAttrChange: function(event) {
  34         if(event.meta.attr === 'class') {
  35             var canvasNode = utils.findCanvasElement(event.meta.node);
  36             canvasNode.setWlxmlClass(event.meta.newVal);
  37         }
  38     },
  39     nodeTagChange: function(event) {
  40         var canvasNode = utils.findCanvasElement(event.meta.node);
  41         canvasNode.setWlxmlTag(event.meta.newTagName);
  42     }
  43 };
  44
  45 return {
  46     create: function(canvas) {
  47         return new Listener(canvas);
  48     }
  49 };
  50
  51 });