_source/core/dom/elementpath.js

   1 /*\r
   2 Copyright (c) 2003-2010, 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,de: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,caption:1,form: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.$block[ child.getName() ] )\r
  24                                 return true;\r
  25                 }\r
  26 \r
  27                 return false;\r
  28         };\r
  29 \r
  30         CKEDITOR.dom.elementPath = function( lastNode )\r
  31         {\r
  32                 var block = null;\r
  33                 var blockLimit = null;\r
  34                 var elements = [];\r
  35 \r
  36                 var e = lastNode;\r
  37 \r
  38                 while ( e )\r
  39                 {\r
  40                         if ( e.type == CKEDITOR.NODE_ELEMENT )\r
  41                         {\r
  42                                 if ( !this.lastElement )\r
  43                                         this.lastElement = e;\r
  44 \r
  45                                 var elementName = e.getName();\r
  46                                 if ( CKEDITOR.env.ie && e.$.scopeName != 'HTML' )\r
  47                                         elementName = e.$.scopeName.toLowerCase() + ':' + elementName;\r
  48 \r
  49                                 if ( !blockLimit )\r
  50                                 {\r
  51                                         if ( !block && pathBlockElements[ elementName ] )\r
  52                                                 block = e;\r
  53 \r
  54                                         if ( pathBlockLimitElements[ elementName ] )\r
  55                                         {\r
  56                                                 // DIV is considered the Block, if no block is available (#525)\r
  57                                                 // and if it doesn't contain other blocks.\r
  58                                                 if ( !block && elementName == 'div' && !checkHasBlock( e ) )\r
  59                                                         block = e;\r
  60                                                 else\r
  61                                                         blockLimit = e;\r
  62                                         }\r
  63                                 }\r
  64 \r
  65                                 elements.push( e );\r
  66 \r
  67                                 if ( elementName == 'body' )\r
  68                                         break;\r
  69                         }\r
  70                         e = e.getParent();\r
  71                 }\r
  72 \r
  73                 this.block = block;\r
  74                 this.blockLimit = blockLimit;\r
  75                 this.elements = elements;\r
  76         };\r
  77 })();\r
  78 \r
  79 CKEDITOR.dom.elementPath.prototype =\r
  80 {\r
  81         /**\r
  82          * Compares this element path with another one.\r
  83          * @param {CKEDITOR.dom.elementPath} otherPath The elementPath object to be\r
  84          * compared with this one.\r
  85          * @returns {Boolean} "true" if the paths are equal, containing the same\r
  86          * number of elements and the same elements in the same order.\r
  87          */\r
  88         compare : function( otherPath )\r
  89         {\r
  90                 var thisElements = this.elements;\r
  91                 var otherElements = otherPath && otherPath.elements;\r
  92 \r
  93                 if ( !otherElements || thisElements.length != otherElements.length )\r
  94                         return false;\r
  95 \r
  96                 for ( var i = 0 ; i < thisElements.length ; i++ )\r
  97                 {\r
  98                         if ( !thisElements[ i ].equals( otherElements[ i ] ) )\r
  99                                 return false;\r
 100                 }\r
 101 \r
 102                 return true;\r
 103         }\r
 104 };\r