_source/plugins/removeformat/plugin.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 CKEDITOR.plugins.add( 'removeformat',\r
   7 {\r
   8         requires : [ 'selection' ],\r
   9 \r
  10         init : function( editor )\r
  11         {\r
  12                 editor.addCommand( 'removeFormat', CKEDITOR.plugins.removeformat.commands.removeformat );\r
  13                 editor.ui.addButton( 'RemoveFormat',\r
  14                         {\r
  15                                 label : editor.lang.removeFormat,\r
  16                                 command : 'removeFormat'\r
  17                         });\r
  18 \r
  19                 editor._.removeFormat = { filters: [] };\r
  20         }\r
  21 });\r
  22 \r
  23 CKEDITOR.plugins.removeformat =\r
  24 {\r
  25         commands :\r
  26         {\r
  27                 removeformat :\r
  28                 {\r
  29                         exec : function( editor )\r
  30                         {\r
  31                                 var tagsRegex = editor._.removeFormatRegex ||\r
  32                                         ( editor._.removeFormatRegex = new RegExp( '^(?:' + editor.config.removeFormatTags.replace( /,/g,'|' ) + ')$', 'i' ) );\r
  33 \r
  34                                 var removeAttributes = editor._.removeAttributes ||\r
  35                                         ( editor._.removeAttributes = editor.config.removeFormatAttributes.split( ',' ) );\r
  36 \r
  37                                 var filter = CKEDITOR.plugins.removeformat.filter;\r
  38                                 var ranges = editor.getSelection().getRanges();\r
  39 \r
  40                                 for ( var i = 0, range ; range = ranges[ i ] ; i++ )\r
  41                                 {\r
  42                                         if ( range.collapsed )\r
  43                                                 continue;\r
  44 \r
  45                                         range.enlarge( CKEDITOR.ENLARGE_ELEMENT );\r
  46 \r
  47                                         // Bookmark the range so we can re-select it after processing.\r
  48                                         var bookmark = range.createBookmark();\r
  49 \r
  50                                         // The style will be applied within the bookmark boundaries.\r
  51                                         var startNode   = bookmark.startNode;\r
  52                                         var endNode             = bookmark.endNode;\r
  53 \r
  54                                         // We need to check the selection boundaries (bookmark spans) to break\r
  55                                         // the code in a way that we can properly remove partially selected nodes.\r
  56                                         // For example, removing a <b> style from\r
  57                                         //              <b>This is [some text</b> to show <b>the] problem</b>\r
  58                                         // ... where [ and ] represent the selection, must result:\r
  59                                         //              <b>This is </b>[some text to show the]<b> problem</b>\r
  60                                         // The strategy is simple, we just break the partial nodes before the\r
  61                                         // removal logic, having something that could be represented this way:\r
  62                                         //              <b>This is </b>[<b>some text</b> to show <b>the</b>]<b> problem</b>\r
  63 \r
  64                                         var breakParent = function( node )\r
  65                                         {\r
  66                                                 // Let's start checking the start boundary.\r
  67                                                 var path = new CKEDITOR.dom.elementPath( node );\r
  68                                                 var pathElements = path.elements;\r
  69 \r
  70                                                 for ( var i = 1, pathElement ; pathElement = pathElements[ i ] ; i++ )\r
  71                                                 {\r
  72                                                         if ( pathElement.equals( path.block ) || pathElement.equals( path.blockLimit ) )\r
  73                                                                 break;\r
  74 \r
  75                                                         // If this element can be removed (even partially).\r
  76                                                         if ( tagsRegex.test( pathElement.getName() ) && filter( editor, pathElement ) )\r
  77                                                                 node.breakParent( pathElement );\r
  78                                                 }\r
  79                                         };\r
  80 \r
  81                                         breakParent( startNode );\r
  82                                         breakParent( endNode );\r
  83 \r
  84                                         // Navigate through all nodes between the bookmarks.\r
  85                                         var currentNode = startNode.getNextSourceNode( true, CKEDITOR.NODE_ELEMENT );\r
  86 \r
  87                                         while ( currentNode )\r
  88                                         {\r
  89                                                 // If we have reached the end of the selection, stop looping.\r
  90                                                 if ( currentNode.equals( endNode ) )\r
  91                                                         break;\r
  92 \r
  93                                                 // Cache the next node to be processed. Do it now, because\r
  94                                                 // currentNode may be removed.\r
  95                                                 var nextNode = currentNode.getNextSourceNode( false, CKEDITOR.NODE_ELEMENT );\r
  96 \r
  97                                                 // This node must not be a fake element.\r
  98                                                 if ( !( currentNode.getName() == 'img'\r
  99                                                         && currentNode.getAttribute( '_cke_realelement' ) )\r
 100                                                         && filter( editor, currentNode ) )\r
 101                                                 {\r
 102                                                         // Remove elements nodes that match with this style rules.\r
 103                                                         if ( tagsRegex.test( currentNode.getName() ) )\r
 104                                                                 currentNode.remove( true );\r
 105                                                         else\r
 106                                                                 currentNode.removeAttributes( removeAttributes );\r
 107                                                 }\r
 108 \r
 109                                                 currentNode = nextNode;\r
 110                                         }\r
 111 \r
 112                                         range.moveToBookmark( bookmark );\r
 113                                 }\r
 114 \r
 115                                 editor.getSelection().selectRanges( ranges );\r
 116                         }\r
 117                 }\r
 118         },\r
 119 \r
 120         /**\r
 121          * Perform the remove format filters on the passed element.\r
 122          * @param {CKEDITOR.editor} editor\r
 123          * @param {CKEDITOR.dom.element} element\r
 124          */\r
 125         filter : function ( editor, element )\r
 126         {\r
 127                 var filters = editor._.removeFormat.filters;\r
 128                 for ( var i = 0; i < filters.length; i++ )\r
 129                 {\r
 130                         if ( filters[ i ]( element ) === false )\r
 131                                 return false;\r
 132                 }\r
 133                 return true;\r
 134         }\r
 135 };\r
 136 \r
 137 /**\r
 138  * Add to a collection of functions to decide whether a specific\r
 139  * element should be considered as formatting element and thus\r
 140  * could be removed during <b>removeFormat</b> command,\r
 141  * Note: Only available with the existence of 'removeformat' plugin.\r
 142  * @since 3.3\r
 143  * @param {Function} func The function to be called, which will be passed a {CKEDITOR.dom.element} element to test.\r
 144  * @example\r
 145  *  // Don't remove empty span\r
 146  *  editor.addRemoveFormatFilter.push( function( element )\r
 147  *              {\r
 148  *                      return !( element.is( 'span' ) && CKEDITOR.tools.isEmpty( element.getAttributes() ) );\r
 149  *              });\r
 150  */\r
 151 CKEDITOR.editor.prototype.addRemoveFormatFilter = function( func )\r
 152 {\r
 153         this._.removeFormat.filters.push( func );\r
 154 };\r
 155 \r
 156 /**\r
 157  * A comma separated list of elements to be removed when executing the "remove\r
 158  " format" command. Note that only inline elements are allowed.\r
 159  * @type String\r
 160  * @default 'b,big,code,del,dfn,em,font,i,ins,kbd,q,samp,small,span,strike,strong,sub,sup,tt,u,var'\r
 161  * @example\r
 162  */\r
 163 CKEDITOR.config.removeFormatTags = 'b,big,code,del,dfn,em,font,i,ins,kbd,q,samp,small,span,strike,strong,sub,sup,tt,u,var';\r
 164 \r
 165 /**\r
 166  * A comma separated list of elements attributes to be removed when executing\r
 167  * the "remove format" command.\r
 168  * @type String\r
 169  * @default 'class,style,lang,width,height,align,hspace,valign'\r
 170  * @example\r
 171  */\r
 172 CKEDITOR.config.removeFormatAttributes = 'class,style,lang,width,height,align,hspace,valign';\r