_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                         // Indicate at least one of the range boundaries is inside a preformat block.\r
  48                         var touchPre;\r
  49 \r
  50                         // Instructs to cleanup remaining BRs.\r
  51                         var removePreviousBr, removeLastBr;\r
  52 \r
  53                         // This is the first iteration. Let's initialize it.\r
  54                         if ( !this._.lastNode )\r
  55                         {\r
  56                                 range = this.range.clone();\r
  57 \r
  58                                 // Shrink the range to exclude harmful "noises" (#4087, #4450, #5435).\r
  59                                 range.shrink( CKEDITOR.NODE_ELEMENT, true );\r
  60 \r
  61                                 touchPre = range.endContainer.hasAscendant( 'pre', true )\r
  62                                         || range.startContainer.hasAscendant( 'pre', true );\r
  63 \r
  64                                 range.enlarge( this.forceBrBreak && !touchPre || !this.enlargeBr ?\r
  65                                                            CKEDITOR.ENLARGE_LIST_ITEM_CONTENTS : CKEDITOR.ENLARGE_BLOCK_CONTENTS );\r
  66 \r
  67                                 var walker = new CKEDITOR.dom.walker( range ),\r
  68                                         ignoreBookmarkTextEvaluator = CKEDITOR.dom.walker.bookmark( true, true );\r
  69                                 // Avoid anchor inside bookmark inner text.\r
  70                                 walker.evaluator = ignoreBookmarkTextEvaluator;\r
  71                                 this._.nextNode = walker.next();\r
  72                                 // TODO: It's better to have walker.reset() used here.\r
  73                                 walker = new CKEDITOR.dom.walker( range );\r
  74                                 walker.evaluator = ignoreBookmarkTextEvaluator;\r
  75                                 var lastNode = walker.previous();\r
  76                                 this._.lastNode = lastNode.getNextSourceNode( true );\r
  77 \r
  78                                 // We may have an empty text node at the end of block due to [3770].\r
  79                                 // If that node is the lastNode, it would cause our logic to leak to the\r
  80                                 // next block.(#3887)\r
  81                                 if ( this._.lastNode &&\r
  82                                                 this._.lastNode.type == CKEDITOR.NODE_TEXT &&\r
  83                                                 !CKEDITOR.tools.trim( this._.lastNode.getText( ) ) &&\r
  84                                                 this._.lastNode.getParent().isBlockBoundary() )\r
  85                                 {\r
  86                                         var testRange = new CKEDITOR.dom.range( range.document );\r
  87                                         testRange.moveToPosition( this._.lastNode, CKEDITOR.POSITION_AFTER_END );\r
  88                                         if ( testRange.checkEndOfBlock() )\r
  89                                         {\r
  90                                                 var path = new CKEDITOR.dom.elementPath( testRange.endContainer );\r
  91                                                 var lastBlock = path.block || path.blockLimit;\r
  92                                                 this._.lastNode = lastBlock.getNextSourceNode( true );\r
  93                                         }\r
  94                                 }\r
  95 \r
  96                                 // Probably the document end is reached, we need a marker node.\r
  97                                 if ( !this._.lastNode )\r
  98                                 {\r
  99                                         this._.lastNode = this._.docEndMarker = range.document.createText( '' );\r
 100                                         this._.lastNode.insertAfter( lastNode );\r
 101                                 }\r
 102 \r
 103                                 // Let's reuse this variable.\r
 104                                 range = null;\r
 105                         }\r
 106 \r
 107                         var currentNode = this._.nextNode;\r
 108                         lastNode = this._.lastNode;\r
 109 \r
 110                         this._.nextNode = null;\r
 111                         while ( currentNode )\r
 112                         {\r
 113                                 // closeRange indicates that a paragraph boundary has been found,\r
 114                                 // so the range can be closed.\r
 115                                 var closeRange = false,\r
 116                                                 parentPre = currentNode.hasAscendant( 'pre' );\r
 117 \r
 118                                 // includeNode indicates that the current node is good to be part\r
 119                                 // of the range. By default, any non-element node is ok for it.\r
 120                                 var includeNode = ( currentNode.type != CKEDITOR.NODE_ELEMENT ),\r
 121                                         continueFromSibling = false;\r
 122 \r
 123                                 // If it is an element node, let's check if it can be part of the\r
 124                                 // range.\r
 125                                 if ( !includeNode )\r
 126                                 {\r
 127                                         var nodeName = currentNode.getName();\r
 128 \r
 129                                         if ( currentNode.isBlockBoundary( this.forceBrBreak &&\r
 130                                                         !parentPre && { br : 1 } ) )\r
 131                                         {\r
 132                                                 // <br> boundaries must be part of the range. It will\r
 133                                                 // happen only if ForceBrBreak.\r
 134                                                 if ( nodeName == 'br' )\r
 135                                                         includeNode = true;\r
 136                                                 else if ( !range && !currentNode.getChildCount() && nodeName != 'hr' )\r
 137                                                 {\r
 138                                                         // If we have found an empty block, and haven't started\r
 139                                                         // the range yet, it means we must return this block.\r
 140                                                         block = currentNode;\r
 141                                                         isLast = currentNode.equals( lastNode );\r
 142                                                         break;\r
 143                                                 }\r
 144 \r
 145                                                 // The range must finish right before the boundary,\r
 146                                                 // including possibly skipped empty spaces. (#1603)\r
 147                                                 if ( range )\r
 148                                                 {\r
 149                                                         range.setEndAt( currentNode, CKEDITOR.POSITION_BEFORE_START );\r
 150 \r
 151                                                         // The found boundary must be set as the next one at this\r
 152                                                         // point. (#1717)\r
 153                                                         if ( nodeName != 'br' )\r
 154                                                                 this._.nextNode = currentNode;\r
 155                                                 }\r
 156 \r
 157                                                 closeRange = true;\r
 158                                         }\r
 159                                         else\r
 160                                         {\r
 161                                                 // If we have child nodes, let's check them.\r
 162                                                 if ( currentNode.getFirst() )\r
 163                                                 {\r
 164                                                         // If we don't have a range yet, let's start it.\r
 165                                                         if ( !range )\r
 166                                                         {\r
 167                                                                 range = new CKEDITOR.dom.range( this.range.document );\r
 168                                                                 range.setStartAt( currentNode, CKEDITOR.POSITION_BEFORE_START );\r
 169                                                         }\r
 170 \r
 171                                                         currentNode = currentNode.getFirst();\r
 172                                                         continue;\r
 173                                                 }\r
 174                                                 includeNode = true;\r
 175                                         }\r
 176                                 }\r
 177                                 else if ( currentNode.type == CKEDITOR.NODE_TEXT )\r
 178                                 {\r
 179                                         // Ignore normal whitespaces (i.e. not including &nbsp; or\r
 180                                         // other unicode whitespaces) before/after a block node.\r
 181                                         if ( beginWhitespaceRegex.test( currentNode.getText() ) )\r
 182                                                 includeNode = false;\r
 183                                 }\r
 184 \r
 185                                 // The current node is good to be part of the range and we are\r
 186                                 // starting a new range, initialize it first.\r
 187                                 if ( includeNode && !range )\r
 188                                 {\r
 189                                         range = new CKEDITOR.dom.range( this.range.document );\r
 190                                         range.setStartAt( currentNode, CKEDITOR.POSITION_BEFORE_START );\r
 191                                 }\r
 192 \r
 193                                 // The last node has been found.\r
 194                                 isLast = ( ( !closeRange || includeNode ) && currentNode.equals( lastNode ) );\r
 195 \r
 196                                 // If we are in an element boundary, let's check if it is time\r
 197                                 // to close the range, otherwise we include the parent within it.\r
 198                                 if ( range && !closeRange )\r
 199                                 {\r
 200                                         while ( !currentNode.getNext() && !isLast )\r
 201                                         {\r
 202                                                 var parentNode = currentNode.getParent();\r
 203 \r
 204                                                 if ( parentNode.isBlockBoundary( this.forceBrBreak\r
 205                                                                 && !parentPre && { br : 1 } ) )\r
 206                                                 {\r
 207                                                         closeRange = true;\r
 208                                                         isLast = isLast || ( parentNode.equals( lastNode) );\r
 209                                                         break;\r
 210                                                 }\r
 211 \r
 212                                                 currentNode = parentNode;\r
 213                                                 includeNode = true;\r
 214                                                 isLast = ( currentNode.equals( lastNode ) );\r
 215                                                 continueFromSibling = true;\r
 216                                         }\r
 217                                 }\r
 218 \r
 219                                 // Now finally include the node.\r
 220                                 if ( includeNode )\r
 221                                         range.setEndAt( currentNode, CKEDITOR.POSITION_AFTER_END );\r
 222 \r
 223                                 currentNode = currentNode.getNextSourceNode( continueFromSibling, null, lastNode );\r
 224                                 isLast = !currentNode;\r
 225 \r
 226                                 // We have found a block boundary. Let's close the range and move out of the\r
 227                                 // loop.\r
 228                                 if ( isLast || ( closeRange && range ) )\r
 229                                                 break;\r
 230                         }\r
 231 \r
 232                         // Now, based on the processed range, look for (or create) the block to be returned.\r
 233                         if ( !block )\r
 234                         {\r
 235                                 // If no range has been found, this is the end.\r
 236                                 if ( !range )\r
 237                                 {\r
 238                                         this._.docEndMarker && this._.docEndMarker.remove();\r
 239                                         this._.nextNode = null;\r
 240                                         return null;\r
 241                                 }\r
 242 \r
 243                                 var startPath = new CKEDITOR.dom.elementPath( range.startContainer );\r
 244                                 var startBlockLimit = startPath.blockLimit,\r
 245                                         checkLimits = { div : 1, th : 1, td : 1 };\r
 246                                 block = startPath.block;\r
 247 \r
 248                                 if ( !block\r
 249                                                 && !this.enforceRealBlocks\r
 250                                                 && checkLimits[ startBlockLimit.getName() ]\r
 251                                                 && range.checkStartOfBlock()\r
 252                                                 && range.checkEndOfBlock() )\r
 253                                         block = startBlockLimit;\r
 254                                 else if ( !block || ( this.enforceRealBlocks && block.getName() == 'li' ) )\r
 255                                 {\r
 256                                         // Create the fixed block.\r
 257                                         block = this.range.document.createElement( blockTag || 'p' );\r
 258 \r
 259                                         // Move the contents of the temporary range to the fixed block.\r
 260                                         range.extractContents().appendTo( block );\r
 261                                         block.trim();\r
 262 \r
 263                                         // Insert the fixed block into the DOM.\r
 264                                         range.insertNode( block );\r
 265 \r
 266                                         removePreviousBr = removeLastBr = true;\r
 267                                 }\r
 268                                 else if ( block.getName() != 'li' )\r
 269                                 {\r
 270                                         // If the range doesn't includes the entire contents of the\r
 271                                         // block, we must split it, isolating the range in a dedicated\r
 272                                         // block.\r
 273                                         if ( !range.checkStartOfBlock() || !range.checkEndOfBlock() )\r
 274                                         {\r
 275                                                 // The resulting block will be a clone of the current one.\r
 276                                                 block = block.clone( false );\r
 277 \r
 278                                                 // Extract the range contents, moving it to the new block.\r
 279                                                 range.extractContents().appendTo( block );\r
 280                                                 block.trim();\r
 281 \r
 282                                                 // Split the block. At this point, the range will be in the\r
 283                                                 // right position for our intents.\r
 284                                                 var splitInfo = range.splitBlock();\r
 285 \r
 286                                                 removePreviousBr = !splitInfo.wasStartOfBlock;\r
 287                                                 removeLastBr = !splitInfo.wasEndOfBlock;\r
 288 \r
 289                                                 // Insert the new block into the DOM.\r
 290                                                 range.insertNode( block );\r
 291                                         }\r
 292                                 }\r
 293                                 else if ( !isLast )\r
 294                                 {\r
 295                                         // LIs are returned as is, with all their children (due to the\r
 296                                         // nested lists). But, the next node is the node right after\r
 297                                         // the current range, which could be an <li> child (nested\r
 298                                         // lists) or the next sibling <li>.\r
 299 \r
 300                                         this._.nextNode = ( block.equals( lastNode ) ? null :\r
 301                                                 range.getBoundaryNodes().endNode.getNextSourceNode( true, null, lastNode ) );\r
 302                                 }\r
 303                         }\r
 304 \r
 305                         if ( removePreviousBr )\r
 306                         {\r
 307                                 var previousSibling = block.getPrevious();\r
 308                                 if ( previousSibling && previousSibling.type == CKEDITOR.NODE_ELEMENT )\r
 309                                 {\r
 310                                         if ( previousSibling.getName() == 'br' )\r
 311                                                 previousSibling.remove();\r
 312                                         else if ( previousSibling.getLast() && previousSibling.getLast().$.nodeName.toLowerCase() == 'br' )\r
 313                                                 previousSibling.getLast().remove();\r
 314                                 }\r
 315                         }\r
 316 \r
 317                         if ( removeLastBr )\r
 318                         {\r
 319                                 // Ignore bookmark nodes.(#3783)\r
 320                                 var bookmarkGuard = CKEDITOR.dom.walker.bookmark( false, true );\r
 321 \r
 322                                 var lastChild = block.getLast();\r
 323                                 if ( lastChild && lastChild.type == CKEDITOR.NODE_ELEMENT && lastChild.getName() == 'br' )\r
 324                                 {\r
 325                                         // Take care not to remove the block expanding <br> in non-IE browsers.\r
 326                                         if ( CKEDITOR.env.ie\r
 327                                                  || lastChild.getPrevious( bookmarkGuard )\r
 328                                                  || lastChild.getNext( bookmarkGuard ) )\r
 329                                                 lastChild.remove();\r
 330                                 }\r
 331                         }\r
 332 \r
 333                         // Get a reference for the next element. This is important because the\r
 334                         // above block can be removed or changed, so we can rely on it for the\r
 335                         // next interation.\r
 336                         if ( !this._.nextNode )\r
 337                         {\r
 338                                 this._.nextNode = ( isLast || block.equals( lastNode ) ) ? null :\r
 339                                         block.getNextSourceNode( true, null, lastNode );\r
 340                         }\r
 341 \r
 342                         return block;\r
 343                 }\r
 344         };\r
 345 \r
 346         CKEDITOR.dom.range.prototype.createIterator = function()\r
 347         {\r
 348                 return new iterator( this );\r
 349         };\r
 350 })();\r