_source/plugins/domiterator/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 /**\r
   7  * @file DOM iterator, which iterates over list items, lines and paragraphs.\r
   8  */\r
   9 \r
  10 CKEDITOR.plugins.add( 'domiterator' );\r
  11 \r
  12 (function()\r
  13 {\r
  14         /**\r
  15          * @name CKEDITOR.dom.iterator\r
  16          */\r
  17         function iterator( range )\r
  18         {\r
  19                 if ( arguments.length < 1 )\r
  20                         return;\r
  21 \r
  22                 this.range = range;\r
  23                 this.forceBrBreak = false;\r
  24 \r
  25                 // Whether include <br>s into the enlarged range.(#3730).\r
  26                 this.enlargeBr = true;\r
  27                 this.enforceRealBlocks = false;\r
  28 \r
  29                 this._ || ( this._ = {} );\r
  30         }\r
  31 \r
  32         var beginWhitespaceRegex = /^[\r\n\t ]+$/,\r
  33                 isBookmark = CKEDITOR.dom.walker.bookmark();\r
  34 \r
  35         iterator.prototype = {\r
  36                 getNextParagraph : function( blockTag )\r
  37                 {\r
  38                         // The block element to be returned.\r
  39                         var block;\r
  40 \r
  41                         // The range object used to identify the paragraph contents.\r
  42                         var range;\r
  43 \r
  44                         // Indicats that the current element in the loop is the last one.\r
  45                         var isLast;\r
  46 \r
  47                         // Instructs to cleanup remaining BRs.\r
  48                         var removePreviousBr, removeLastBr;\r
  49 \r
  50                         // This is the first iteration. Let's initialize it.\r
  51                         if ( !this._.lastNode )\r
  52                         {\r
  53                                 range = this.range.clone();\r
  54                                 range.enlarge( this.forceBrBreak || !this.enlargeBr ?\r
  55                                                            CKEDITOR.ENLARGE_LIST_ITEM_CONTENTS : CKEDITOR.ENLARGE_BLOCK_CONTENTS );\r
  56 \r
  57                                 var walker = new CKEDITOR.dom.walker( range ),\r
  58                                         ignoreBookmarkTextEvaluator = CKEDITOR.dom.walker.bookmark( true, true );\r
  59                                 // Avoid anchor inside bookmark inner text.\r
  60                                 walker.evaluator = ignoreBookmarkTextEvaluator;\r
  61                                 this._.nextNode = walker.next();\r
  62                                 // TODO: It's better to have walker.reset() used here.\r
  63                                 walker = new CKEDITOR.dom.walker( range );\r
  64                                 walker.evaluator = ignoreBookmarkTextEvaluator;\r
  65                                 var lastNode = walker.previous();\r
  66                                 this._.lastNode = lastNode.getNextSourceNode( true );\r
  67 \r
  68                                 // We may have an empty text node at the end of block due to [3770].\r
  69                                 // If that node is the lastNode, it would cause our logic to leak to the\r
  70                                 // next block.(#3887)\r
  71                                 if ( this._.lastNode &&\r
  72                                                 this._.lastNode.type == CKEDITOR.NODE_TEXT &&\r
  73                                                 !CKEDITOR.tools.trim( this._.lastNode.getText( ) ) &&\r
  74                                                 this._.lastNode.getParent().isBlockBoundary() )\r
  75                                 {\r
  76                                         var testRange = new CKEDITOR.dom.range( range.document );\r
  77                                         testRange.moveToPosition( this._.lastNode, CKEDITOR.POSITION_AFTER_END );\r
  78                                         if ( testRange.checkEndOfBlock() )\r
  79                                         {\r
  80                                                 var path = new CKEDITOR.dom.elementPath( testRange.endContainer );\r
  81                                                 var lastBlock = path.block || path.blockLimit;\r
  82                                                 this._.lastNode = lastBlock.getNextSourceNode( true );\r
  83                                         }\r
  84                                 }\r
  85 \r
  86                                 // Probably the document end is reached, we need a marker node.\r
  87                                 if ( !this._.lastNode )\r
  88                                 {\r
  89                                         this._.lastNode = this._.docEndMarker = range.document.createText( '' );\r
  90                                         this._.lastNode.insertAfter( lastNode );\r
  91                                 }\r
  92 \r
  93                                 // Let's reuse this variable.\r
  94                                 range = null;\r
  95                         }\r
  96 \r
  97                         var currentNode = this._.nextNode;\r
  98                         lastNode = this._.lastNode;\r
  99 \r
 100                         this._.nextNode = null;\r
 101                         while ( currentNode )\r
 102                         {\r
 103                                 // closeRange indicates that a paragraph boundary has been found,\r
 104                                 // so the range can be closed.\r
 105                                 var closeRange = false;\r
 106 \r
 107                                 // includeNode indicates that the current node is good to be part\r
 108                                 // of the range. By default, any non-element node is ok for it.\r
 109                                 var includeNode = ( currentNode.type != CKEDITOR.NODE_ELEMENT ),\r
 110                                         continueFromSibling = false;\r
 111 \r
 112                                 // If it is an element node, let's check if it can be part of the\r
 113                                 // range.\r
 114                                 if ( !includeNode )\r
 115                                 {\r
 116                                         var nodeName = currentNode.getName();\r
 117 \r
 118                                         if ( currentNode.isBlockBoundary( this.forceBrBreak && { br : 1 } ) )\r
 119                                         {\r
 120                                                 // <br> boundaries must be part of the range. It will\r
 121                                                 // happen only if ForceBrBreak.\r
 122                                                 if ( nodeName == 'br' )\r
 123                                                         includeNode = true;\r
 124                                                 else if ( !range && !currentNode.getChildCount() && nodeName != 'hr' )\r
 125                                                 {\r
 126                                                         // If we have found an empty block, and haven't started\r
 127                                                         // the range yet, it means we must return this block.\r
 128                                                         block = currentNode;\r
 129                                                         isLast = currentNode.equals( lastNode );\r
 130                                                         break;\r
 131                                                 }\r
 132 \r
 133                                                 // The range must finish right before the boundary,\r
 134                                                 // including possibly skipped empty spaces. (#1603)\r
 135                                                 if ( range )\r
 136                                                 {\r
 137                                                         range.setEndAt( currentNode, CKEDITOR.POSITION_BEFORE_START );\r
 138 \r
 139                                                         // The found boundary must be set as the next one at this\r
 140                                                         // point. (#1717)\r
 141                                                         if ( nodeName != 'br' )\r
 142                                                                 this._.nextNode = currentNode;\r
 143                                                 }\r
 144 \r
 145                                                 closeRange = true;\r
 146                                         }\r
 147                                         else\r
 148                                         {\r
 149                                                 // If we have child nodes, let's check them.\r
 150                                                 if ( currentNode.getFirst() )\r
 151                                                 {\r
 152                                                         // If we don't have a range yet, let's start it.\r
 153                                                         if ( !range )\r
 154                                                         {\r
 155                                                                 range = new CKEDITOR.dom.range( this.range.document );\r
 156                                                                 range.setStartAt( currentNode, CKEDITOR.POSITION_BEFORE_START );\r
 157                                                         }\r
 158 \r
 159                                                         currentNode = currentNode.getFirst();\r
 160                                                         continue;\r
 161                                                 }\r
 162                                                 includeNode = true;\r
 163                                         }\r
 164                                 }\r
 165                                 else if ( currentNode.type == CKEDITOR.NODE_TEXT )\r
 166                                 {\r
 167                                         // Ignore normal whitespaces (i.e. not including &nbsp; or\r
 168                                         // other unicode whitespaces) before/after a block node.\r
 169                                         if ( beginWhitespaceRegex.test( currentNode.getText() ) )\r
 170                                                 includeNode = false;\r
 171                                 }\r
 172 \r
 173                                 // The current node is good to be part of the range and we are\r
 174                                 // starting a new range, initialize it first.\r
 175                                 if ( includeNode && !range )\r
 176                                 {\r
 177                                         range = new CKEDITOR.dom.range( this.range.document );\r
 178                                         range.setStartAt( currentNode, CKEDITOR.POSITION_BEFORE_START );\r
 179                                 }\r
 180 \r
 181                                 // The last node has been found.\r
 182                                 isLast = ( ( !closeRange || includeNode ) && currentNode.equals( lastNode ) );\r
 183 \r
 184                                 // If we are in an element boundary, let's check if it is time\r
 185                                 // to close the range, otherwise we include the parent within it.\r
 186                                 if ( range && !closeRange )\r
 187                                 {\r
 188                                         while ( !currentNode.getNext() && !isLast )\r
 189                                         {\r
 190                                                 var parentNode = currentNode.getParent();\r
 191 \r
 192                                                 if ( parentNode.isBlockBoundary( this.forceBrBreak && { br : 1 } ) )\r
 193                                                 {\r
 194                                                         closeRange = true;\r
 195                                                         isLast = isLast || ( parentNode.equals( lastNode) );\r
 196                                                         break;\r
 197                                                 }\r
 198 \r
 199                                                 currentNode = parentNode;\r
 200                                                 includeNode = true;\r
 201                                                 isLast = ( currentNode.equals( lastNode ) );\r
 202                                                 continueFromSibling = true;\r
 203                                         }\r
 204                                 }\r
 205 \r
 206                                 // Now finally include the node.\r
 207                                 if ( includeNode )\r
 208                                         range.setEndAt( currentNode, CKEDITOR.POSITION_AFTER_END );\r
 209 \r
 210                                 currentNode = currentNode.getNextSourceNode( continueFromSibling, null, lastNode );\r
 211                                 isLast = !currentNode;\r
 212 \r
 213                                 // We have found a block boundary. Let's close the range and move out of the\r
 214                                 // loop.\r
 215                                 if ( ( closeRange || isLast ) && range )\r
 216                                 {\r
 217                                         var boundaryNodes = range.getBoundaryNodes(),\r
 218                                                 startPath = new CKEDITOR.dom.elementPath( range.startContainer );\r
 219 \r
 220                                         // Drop the range if it only contains bookmark nodes, and is\r
 221                                         // not because of the original collapsed range. (#4087,#4450)\r
 222                                         if ( boundaryNodes.startNode.getParent().equals( startPath.blockLimit )\r
 223                                                  && isBookmark( boundaryNodes.startNode ) && isBookmark( boundaryNodes.endNode ) )\r
 224                                         {\r
 225                                                 range = null;\r
 226                                                 this._.nextNode = null;\r
 227                                         }\r
 228                                         else\r
 229                                                 break;\r
 230                                 }\r
 231 \r
 232                                 if ( isLast )\r
 233                                         break;\r
 234 \r
 235                         }\r
 236 \r
 237                         // Now, based on the processed range, look for (or create) the block to be returned.\r
 238                         if ( !block )\r
 239                         {\r
 240                                 // If no range has been found, this is the end.\r
 241                                 if ( !range )\r
 242                                 {\r
 243                                         this._.docEndMarker && this._.docEndMarker.remove();\r
 244                                         this._.nextNode = null;\r
 245                                         return null;\r
 246                                 }\r
 247 \r
 248                                 startPath = new CKEDITOR.dom.elementPath( range.startContainer );\r
 249                                 var startBlockLimit = startPath.blockLimit,\r
 250                                         checkLimits = { div : 1, th : 1, td : 1 };\r
 251                                 block = startPath.block;\r
 252 \r
 253                                 if ( !block\r
 254                                                 && !this.enforceRealBlocks\r
 255                                                 && checkLimits[ startBlockLimit.getName() ]\r
 256                                                 && range.checkStartOfBlock()\r
 257                                                 && range.checkEndOfBlock() )\r
 258                                         block = startBlockLimit;\r
 259                                 else if ( !block || ( this.enforceRealBlocks && block.getName() == 'li' ) )\r
 260                                 {\r
 261                                         // Create the fixed block.\r
 262                                         block = this.range.document.createElement( blockTag || 'p' );\r
 263 \r
 264                                         // Move the contents of the temporary range to the fixed block.\r
 265                                         range.extractContents().appendTo( block );\r
 266                                         block.trim();\r
 267 \r
 268                                         // Insert the fixed block into the DOM.\r
 269                                         range.insertNode( block );\r
 270 \r
 271                                         removePreviousBr = removeLastBr = true;\r
 272                                 }\r
 273                                 else if ( block.getName() != 'li' )\r
 274                                 {\r
 275                                         // If the range doesn't includes the entire contents of the\r
 276                                         // block, we must split it, isolating the range in a dedicated\r
 277                                         // block.\r
 278                                         if ( !range.checkStartOfBlock() || !range.checkEndOfBlock() )\r
 279                                         {\r
 280                                                 // The resulting block will be a clone of the current one.\r
 281                                                 block = block.clone( false );\r
 282 \r
 283                                                 // Extract the range contents, moving it to the new block.\r
 284                                                 range.extractContents().appendTo( block );\r
 285                                                 block.trim();\r
 286 \r
 287                                                 // Split the block. At this point, the range will be in the\r
 288                                                 // right position for our intents.\r
 289                                                 var splitInfo = range.splitBlock();\r
 290 \r
 291                                                 removePreviousBr = !splitInfo.wasStartOfBlock;\r
 292                                                 removeLastBr = !splitInfo.wasEndOfBlock;\r
 293 \r
 294                                                 // Insert the new block into the DOM.\r
 295                                                 range.insertNode( block );\r
 296                                         }\r
 297                                 }\r
 298                                 else if ( !isLast )\r
 299                                 {\r
 300                                         // LIs are returned as is, with all their children (due to the\r
 301                                         // nested lists). But, the next node is the node right after\r
 302                                         // the current range, which could be an <li> child (nested\r
 303                                         // lists) or the next sibling <li>.\r
 304 \r
 305                                         this._.nextNode = ( block.equals( lastNode ) ? null :\r
 306                                                 range.getBoundaryNodes().endNode.getNextSourceNode( true, null, lastNode ) );\r
 307                                 }\r
 308                         }\r
 309 \r
 310                         if ( removePreviousBr )\r
 311                         {\r
 312                                 var previousSibling = block.getPrevious();\r
 313                                 if ( previousSibling && previousSibling.type == CKEDITOR.NODE_ELEMENT )\r
 314                                 {\r
 315                                         if ( previousSibling.getName() == 'br' )\r
 316                                                 previousSibling.remove();\r
 317                                         else if ( previousSibling.getLast() && previousSibling.getLast().$.nodeName.toLowerCase() == 'br' )\r
 318                                                 previousSibling.getLast().remove();\r
 319                                 }\r
 320                         }\r
 321 \r
 322                         if ( removeLastBr )\r
 323                         {\r
 324                                 // Ignore bookmark nodes.(#3783)\r
 325                                 var bookmarkGuard = CKEDITOR.dom.walker.bookmark( false, true );\r
 326 \r
 327                                 var lastChild = block.getLast();\r
 328                                 if ( lastChild && lastChild.type == CKEDITOR.NODE_ELEMENT && lastChild.getName() == 'br' )\r
 329                                 {\r
 330                                         // Take care not to remove the block expanding <br> in non-IE browsers.\r
 331                                         if ( CKEDITOR.env.ie\r
 332                                                  || lastChild.getPrevious( bookmarkGuard )\r
 333                                                  || lastChild.getNext( bookmarkGuard ) )\r
 334                                                 lastChild.remove();\r
 335                                 }\r
 336                         }\r
 337 \r
 338                         // Get a reference for the next element. This is important because the\r
 339                         // above block can be removed or changed, so we can rely on it for the\r
 340                         // next interation.\r
 341                         if ( !this._.nextNode )\r
 342                         {\r
 343                                 this._.nextNode = ( isLast || block.equals( lastNode ) ) ? null :\r
 344                                         block.getNextSourceNode( true, null, lastNode );\r
 345                         }\r
 346 \r
 347                         return block;\r
 348                 }\r
 349         };\r
 350 \r
 351         CKEDITOR.dom.range.prototype.createIterator = function()\r
 352         {\r
 353                 return new iterator( this );\r
 354         };\r
 355 })();\r