_source/core/dom/elementpath.js

   1 /*\r
   2 Copyright (c) 2003-2011, CKSource - Frederico Knabben. All rights reserved.\r
   3 For licensing, see LICENSE.html or http://ckeditor.com/license\r
   4 */\r
   5 \r
   6 (function()\r
   7 {\r
   8         // Elements that may be considered the "Block boundary" in an element path.\r
   9         var pathBlockElements = { address:1,blockquote:1,dl:1,h1:1,h2:1,h3:1,h4:1,h5:1,h6:1,p:1,pre:1,li:1,dt:1,dd:1, legend:1,caption:1 };\r
  10 \r
  11         // Elements that may be considered the "Block limit" in an element path.\r
  12         var pathBlockLimitElements = { body:1,div:1,table:1,tbody:1,tr:1,td:1,th:1,form:1,fieldset:1 };\r
  13 \r
  14         // Check if an element contains any block element.\r
  15         var checkHasBlock = function( element )\r
  16         {\r
  17                 var childNodes = element.getChildren();\r
  18 \r
  19                 for ( var i = 0, count = childNodes.count() ; i < count ; i++ )\r
  20                 {\r
  21                         var child = childNodes.getItem( i );\r
  22 \r
  23                         if ( child.type == CKEDITOR.NODE_ELEMENT && CKEDITOR.dtd.$block[ child.getName() ] )\r
  24                                 return true;\r
  25                 }\r
  26 \r
  27                 return false;\r
  28         };\r
  29 \r
  30         /**\r
  31          * @class\r
  32          */\r
  33         CKEDITOR.dom.elementPath = function( lastNode )\r
  34         {\r
  35                 var block = null;\r
  36                 var blockLimit = null;\r
  37                 var elements = [];\r
  38 \r
  39                 var e = lastNode;\r
  40 \r
  41                 while ( e )\r
  42                 {\r
  43                         if ( e.type == CKEDITOR.NODE_ELEMENT )\r
  44                         {\r
  45                                 if ( !this.lastElement )\r
  46                                         this.lastElement = e;\r
  47 \r
  48                                 var elementName = e.getName();\r
  49                                 if ( CKEDITOR.env.ie && e.$.scopeName != 'HTML' )\r
  50                                         elementName = e.$.scopeName.toLowerCase() + ':' + elementName;\r
  51 \r
  52                                 if ( !blockLimit )\r
  53                                 {\r
  54                                         if ( !block && pathBlockElements[ elementName ] )\r
  55                                                 block = e;\r
  56 \r
  57                                         if ( pathBlockLimitElements[ elementName ] )\r
  58                                         {\r
  59                                                 // DIV is considered the Block, if no block is available (#525)\r
  60                                                 // and if it doesn't contain other blocks.\r
  61                                                 if ( !block && elementName == 'div' && !checkHasBlock( e ) )\r
  62                                                         block = e;\r
  63                                                 else\r
  64                                                         blockLimit = e;\r
  65                                         }\r
  66                                 }\r
  67 \r
  68                                 elements.push( e );\r
  69 \r
  70                                 if ( elementName == 'body' )\r
  71                                         break;\r
  72                         }\r
  73                         e = e.getParent();\r
  74                 }\r
  75 \r
  76                 this.block = block;\r
  77                 this.blockLimit = blockLimit;\r
  78                 this.elements = elements;\r
  79         };\r
  80 })();\r
  81 \r
  82 CKEDITOR.dom.elementPath.prototype =\r
  83 {\r
  84         /**\r
  85          * Compares this element path with another one.\r
  86          * @param {CKEDITOR.dom.elementPath} otherPath The elementPath object to be\r
  87          * compared with this one.\r
  88          * @returns {Boolean} "true" if the paths are equal, containing the same\r
  89          * number of elements and the same elements in the same order.\r
  90          */\r
  91         compare : function( otherPath )\r
  92         {\r
  93                 var thisElements = this.elements;\r
  94                 var otherElements = otherPath && otherPath.elements;\r
  95 \r
  96                 if ( !otherElements || thisElements.length != otherElements.length )\r
  97                         return false;\r
  98 \r
  99                 for ( var i = 0 ; i < thisElements.length ; i++ )\r
 100                 {\r
 101                         if ( !thisElements[ i ].equals( otherElements[ i ] ) )\r
 102                                 return false;\r
 103                 }\r
 104 \r
 105                 return true;\r
 106         },\r
 107 \r
 108         contains : function( tagNames )\r
 109         {\r
 110                 var elements = this.elements;\r
 111                 for ( var i = 0 ; i < elements.length ; i++ )\r
 112                 {\r
 113                         if ( elements[ i ].getName() in tagNames )\r
 114                                 return elements[ i ];\r
 115                 }\r
 116 \r
 117                 return null;\r
 118         }\r
 119 };\r