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('operationEnd', function() {
  27             this.canvas.triggerSelectionChanged();
  28         }, this);
  29
  30         wlxmlDocument.on('contentSet', function() {
  31             this.canvas.loadWlxmlDocument(wlxmlDocument);
  32         }, this);
  33     }
  34 });
  35
  36
  37 var _metadataEventHandler = function(event) {
  38     var element = utils.getElementForNode(event.meta.node);
  39     element.handle(event);
  40 };
  41
  42
  43 var handlers = {
  44     nodeAttrChange: function(event) {
  45         var element = utils.getElementForNode(event.meta.node),
  46             newElement;
  47         if(event.meta.attr === 'class') {
  48             if(element.wlxmlNode.getClass() !== event.meta.attr) {
  49                 if(event.meta.node.isRoot()) {
  50                     this.canvas.reloadRoot();
  51                 } else {
  52                     newElement = this.canvas.createElement(event.meta.node);
  53                     element.dom.replaceWith(newElement.dom);
  54                 }
  55             }
  56
  57         } else {
  58             element.handle(event);
  59         }
  60     },
  61     nodeAdded: function(event) {
  62         if(event.meta.node.isRoot()) {
  63             this.canvas.reloadRoot();
  64             return;
  65         }
  66
  67         var containingNode = event.meta.node.parent(),
  68             containingElement = utils.getElementForNode(containingNode);
  69
  70         containingElement.handle(event);
  71     },
  72     nodeDetached: function(event) {
  73         var element = utils.getElementForDetachedNode(event.meta.node, event.meta.parent);
  74         element.handle(event);
  75     },
  76     nodeTextChange: function(event) {
  77         var element = utils.getElementForNode(event.meta.node);
  78         element.setText(event.meta.node.getText());
  79     },
  80
  81     metadataChanged: _metadataEventHandler,
  82     metadataAdded: _metadataEventHandler,
  83     metadataRemoved: _metadataEventHandler
  84 };
  85
  86 return {
  87     create: function(canvas) {
  88         return new Listener(canvas);
  89     }
  90 };
  91
  92 });