_source/plugins/htmldataprocessor/plugin.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         // Regex to scan for &nbsp; at the end of blocks, which are actually placeholders.\r
   9         // Safari transforms the &nbsp; to \xa0. (#4172)\r
  10         var tailNbspRegex = /^[\t\r\n ]*(?:&nbsp;|\xa0)$/;\r
  11 \r
  12         var protectedSourceMarker = '{cke_protected}';\r
  13 \r
  14         // Return the last non-space child node of the block (#4344).\r
  15         function lastNoneSpaceChild( block )\r
  16         {\r
  17                 var lastIndex = block.children.length,\r
  18                         last = block.children[ lastIndex - 1 ];\r
  19                 while (  last && last.type == CKEDITOR.NODE_TEXT && !CKEDITOR.tools.trim( last.value ) )\r
  20                         last = block.children[ --lastIndex ];\r
  21                 return last;\r
  22         }\r
  23 \r
  24         function trimFillers( block, fromSource )\r
  25         {\r
  26                 // If the current node is a block, and if we're converting from source or\r
  27                 // we're not in IE then search for and remove any tailing BR node.\r
  28                 //\r
  29                 // Also, any &nbsp; at the end of blocks are fillers, remove them as well.\r
  30                 // (#2886)\r
  31                 var children = block.children, lastChild = lastNoneSpaceChild( block );\r
  32                 if ( lastChild )\r
  33                 {\r
  34                         if ( ( fromSource || !CKEDITOR.env.ie ) && lastChild.type == CKEDITOR.NODE_ELEMENT && lastChild.name == 'br' )\r
  35                                 children.pop();\r
  36                         if ( lastChild.type == CKEDITOR.NODE_TEXT && tailNbspRegex.test( lastChild.value ) )\r
  37                                 children.pop();\r
  38                 }\r
  39         }\r
  40 \r
  41         function blockNeedsExtension( block, fromSource, extendEmptyBlock )\r
  42         {\r
  43                 if( !fromSource && ( !extendEmptyBlock ||\r
  44                         typeof extendEmptyBlock == 'function' && ( extendEmptyBlock( block ) === false ) ) )\r
  45                         return false;\r
  46 \r
  47         // 1. For IE version >=8,  empty blocks are displayed correctly themself in wysiwiyg;\r
  48         // 2. For the rest, at least table cell and list item need no filler space.\r
  49         // (#6248)\r
  50         if ( fromSource && CKEDITOR.env.ie &&\r
  51                 ( document.documentMode > 7\r
  52                 || block.name in CKEDITOR.dtd.tr\r
  53                 || block.name in CKEDITOR.dtd.$listItem ) )\r
  54             return false;\r
  55 \r
  56                 var lastChild = lastNoneSpaceChild( block );\r
  57 \r
  58                 return !lastChild || lastChild &&\r
  59                                 ( lastChild.type == CKEDITOR.NODE_ELEMENT && lastChild.name == 'br'\r
  60                                 // Some of the controls in form needs extension too,\r
  61                                 // to move cursor at the end of the form. (#4791)\r
  62                                 || block.name == 'form' && lastChild.name == 'input' );\r
  63         }\r
  64 \r
  65         function getBlockExtension( isOutput, emptyBlockFiller )\r
  66         {\r
  67                 return function( node )\r
  68                 {\r
  69                         trimFillers( node, !isOutput );\r
  70 \r
  71                         if ( blockNeedsExtension( node, !isOutput, emptyBlockFiller ) )\r
  72                         {\r
  73                                 if ( isOutput || CKEDITOR.env.ie )\r
  74                                         node.add( new CKEDITOR.htmlParser.text( '\xa0' ) );\r
  75                                 else\r
  76                                         node.add( new CKEDITOR.htmlParser.element( 'br', {} ) );\r
  77                         }\r
  78                 };\r
  79         }\r
  80 \r
  81         var dtd = CKEDITOR.dtd;\r
  82 \r
  83         // Define orders of table elements.\r
  84         var tableOrder = [ 'caption', 'colgroup', 'col', 'thead', 'tfoot', 'tbody' ];\r
  85 \r
  86         // Find out the list of block-like tags that can contain <br>.\r
  87         var blockLikeTags = CKEDITOR.tools.extend( {}, dtd.$block, dtd.$listItem, dtd.$tableContent );\r
  88         for ( var i in blockLikeTags )\r
  89         {\r
  90                 if ( ! ( 'br' in dtd[i] ) )\r
  91                         delete blockLikeTags[i];\r
  92         }\r
  93         // We just avoid filler in <pre> right now.\r
  94         // TODO: Support filler for <pre>, line break is also occupy line height.\r
  95         delete blockLikeTags.pre;\r
  96         var defaultDataFilterRules =\r
  97         {\r
  98                 elements : {},\r
  99                 attributeNames :\r
 100                 [\r
 101                         // Event attributes (onXYZ) must not be directly set. They can become\r
 102                         // active in the editing area (IE|WebKit).\r
 103                         [ ( /^on/ ), 'data-cke-pa-on' ]\r
 104                 ]\r
 105         };\r
 106 \r
 107         var defaultDataBlockFilterRules = { elements : {} };\r
 108 \r
 109         for ( i in blockLikeTags )\r
 110                 defaultDataBlockFilterRules.elements[ i ] = getBlockExtension();\r
 111 \r
 112         var defaultHtmlFilterRules =\r
 113                 {\r
 114                         elementNames :\r
 115                         [\r
 116                                 // Remove the "cke:" namespace prefix.\r
 117                                 [ ( /^cke:/ ), '' ],\r
 118 \r
 119                                 // Ignore <?xml:namespace> tags.\r
 120                                 [ ( /^\?xml:namespace$/ ), '' ]\r
 121                         ],\r
 122 \r
 123                         attributeNames :\r
 124                         [\r
 125                                 // Attributes saved for changes and protected attributes.\r
 126                                 [ ( /^data-cke-(saved|pa)-/ ), '' ],\r
 127 \r
 128                                 // All "data-cke-" attributes are to be ignored.\r
 129                                 [ ( /^data-cke-.*/ ), '' ],\r
 130 \r
 131                                 [ 'hidefocus', '' ]\r
 132                         ],\r
 133 \r
 134                         elements :\r
 135                         {\r
 136                                 $ : function( element )\r
 137                                 {\r
 138                                         var attribs = element.attributes;\r
 139 \r
 140                                         if ( attribs )\r
 141                                         {\r
 142                                                 // Elements marked as temporary are to be ignored.\r
 143                                                 if ( attribs[ 'data-cke-temp' ] )\r
 144                                                         return false;\r
 145 \r
 146                                                 // Remove duplicated attributes - #3789.\r
 147                                                 var attributeNames = [ 'name', 'href', 'src' ],\r
 148                                                         savedAttributeName;\r
 149                                                 for ( var i = 0 ; i < attributeNames.length ; i++ )\r
 150                                                 {\r
 151                                                         savedAttributeName = 'data-cke-saved-' + attributeNames[ i ];\r
 152                                                         savedAttributeName in attribs && ( delete attribs[ attributeNames[ i ] ] );\r
 153                                                 }\r
 154                                         }\r
 155 \r
 156                                         return element;\r
 157                                 },\r
 158 \r
 159                                 // The contents of table should be in correct order (#4809).\r
 160                                 table : function( element )\r
 161                                 {\r
 162                                         var children = element.children;\r
 163                                         children.sort( function ( node1, node2 )\r
 164                                                                    {\r
 165                                                                            return node1.type == CKEDITOR.NODE_ELEMENT && node2.type == node1.type ?\r
 166                                                                                         CKEDITOR.tools.indexOf( tableOrder, node1.name )  > CKEDITOR.tools.indexOf( tableOrder, node2.name ) ? 1 : -1 : 0;\r
 167                                                                    } );\r
 168                                 },\r
 169 \r
 170                                 embed : function( element )\r
 171                                 {\r
 172                                         var parent = element.parent;\r
 173 \r
 174                                         // If the <embed> is child of a <object>, copy the width\r
 175                                         // and height attributes from it.\r
 176                                         if ( parent && parent.name == 'object' )\r
 177                                         {\r
 178                                                 var parentWidth = parent.attributes.width,\r
 179                                                         parentHeight = parent.attributes.height;\r
 180                                                 parentWidth && ( element.attributes.width = parentWidth );\r
 181                                                 parentHeight && ( element.attributes.height = parentHeight );\r
 182                                         }\r
 183                                 },\r
 184                                 // Restore param elements into self-closing.\r
 185                                 param : function( param )\r
 186                                 {\r
 187                                         param.children = [];\r
 188                                         param.isEmpty = true;\r
 189                                         return param;\r
 190                                 },\r
 191 \r
 192                                 // Remove empty link but not empty anchor.(#3829)\r
 193                                 a : function( element )\r
 194                                 {\r
 195                                         if ( !( element.children.length ||\r
 196                                                         element.attributes.name ||\r
 197                                                         element.attributes[ 'data-cke-saved-name' ] ) )\r
 198                                         {\r
 199                                                 return false;\r
 200                                         }\r
 201                                 },\r
 202 \r
 203                                 // Remove dummy span in webkit.\r
 204                                 span: function( element )\r
 205                                 {\r
 206                                         if ( element.attributes[ 'class' ] == 'Apple-style-span' )\r
 207                                                 delete element.name;\r
 208                                 },\r
 209 \r
 210                                 // Empty <pre> in IE is reported with filler node (&nbsp;).\r
 211                                 pre : function( element ) { CKEDITOR.env.ie && trimFillers( element ); },\r
 212 \r
 213                                 html : function( element )\r
 214                                 {\r
 215                                         delete element.attributes.contenteditable;\r
 216                                         delete element.attributes[ 'class' ];\r
 217                                 },\r
 218 \r
 219                                 body : function( element )\r
 220                                 {\r
 221                                         delete element.attributes.spellcheck;\r
 222                                         delete element.attributes.contenteditable;\r
 223                                 },\r
 224 \r
 225                                 style : function( element )\r
 226                                 {\r
 227                                         var child = element.children[ 0 ];\r
 228                                         child && child.value && ( child.value = CKEDITOR.tools.trim( child.value ));\r
 229 \r
 230                                         if ( !element.attributes.type )\r
 231                                                 element.attributes.type = 'text/css';\r
 232                                 },\r
 233 \r
 234                                 title : function( element )\r
 235                                 {\r
 236                                         var titleText = element.children[ 0 ];\r
 237                                         titleText && ( titleText.value = element.attributes[ 'data-cke-title' ] || '' );\r
 238                                 }\r
 239                         },\r
 240 \r
 241                         attributes :\r
 242                         {\r
 243                                 'class' : function( value, element )\r
 244                                 {\r
 245                                         // Remove all class names starting with "cke_".\r
 246                                         return CKEDITOR.tools.ltrim( value.replace( /(?:^|\s+)cke_[^\s]*/g, '' ) ) || false;\r
 247                                 }\r
 248                         }\r
 249                 };\r
 250 \r
 251         if ( CKEDITOR.env.ie )\r
 252         {\r
 253                 // IE outputs style attribute in capital letters. We should convert\r
 254                 // them back to lower case, while not hurting the values (#5930)\r
 255                 defaultHtmlFilterRules.attributes.style = function( value, element )\r
 256                 {\r
 257                         return value.replace( /(^|;)([^\:]+)/g, function( match )\r
 258                                 {\r
 259                                         return match.toLowerCase();\r
 260                                 });\r
 261                 };\r
 262         }\r
 263 \r
 264         function protectReadOnly( element )\r
 265         {\r
 266                 var attrs = element.attributes;\r
 267 \r
 268                 // We should flag that the element was locked by our code so\r
 269                 // it'll be editable by the editor functions (#6046).\r
 270                 if ( attrs.contenteditable != "false" )\r
 271                         attrs[ 'data-cke-editable' ] = attrs.contenteditable ? 'true' : 1;\r
 272 \r
 273                 attrs.contenteditable = "false";\r
 274         }\r
 275         function unprotectReadyOnly( element )\r
 276         {\r
 277                 var attrs = element.attributes;\r
 278                 switch( attrs[ 'data-cke-editable' ] )\r
 279                 {\r
 280                         case 'true':    attrs.contenteditable = 'true'; break;\r
 281                         case '1':               delete attrs.contenteditable;   break;\r
 282                 }\r
 283         }\r
 284         // Disable form elements editing mode provided by some browers. (#5746)\r
 285         for ( i in { input : 1, textarea : 1 } )\r
 286         {\r
 287                 defaultDataFilterRules.elements[ i ] = protectReadOnly;\r
 288                 defaultHtmlFilterRules.elements[ i ] = unprotectReadyOnly;\r
 289         }\r
 290 \r
 291         var protectElementRegex = /<(a|area|img|input)\b([^>]*)>/gi,\r
 292                 protectAttributeRegex = /\b(href|src|name)\s*=\s*(?:(?:"[^"]*")|(?:'[^']*')|(?:[^ "'>]+))/gi;\r
 293 \r
 294         var protectElementsRegex = /(?:<style(?=[ >])[^>]*>[\s\S]*<\/style>)|(?:<(:?link|meta|base)[^>]*>)/gi,\r
 295                 encodedElementsRegex = /<cke:encoded>([^<]*)<\/cke:encoded>/gi;\r
 296 \r
 297         var protectElementNamesRegex = /(<\/?)((?:object|embed|param|html|body|head|title)[^>]*>)/gi,\r
 298                 unprotectElementNamesRegex = /(<\/?)cke:((?:html|body|head|title)[^>]*>)/gi;\r
 299 \r
 300         var protectSelfClosingRegex = /<cke:(param|embed)([^>]*?)\/?>(?!\s*<\/cke:\1)/gi;\r
 301 \r
 302         function protectAttributes( html )\r
 303         {\r
 304                 return html.replace( protectElementRegex, function( element, tag, attributes )\r
 305                 {\r
 306                         return '<' +  tag + attributes.replace( protectAttributeRegex, function( fullAttr, attrName )\r
 307                         {\r
 308                                 // We should not rewrite the existed protected attributes, e.g. clipboard content from editor. (#5218)\r
 309                                 if ( attributes.indexOf( 'data-cke-saved-' + attrName ) == -1 )\r
 310                                         return ' data-cke-saved-' + fullAttr + ' ' + fullAttr;\r
 311 \r
 312                                 return fullAttr;\r
 313                         }) + '>';\r
 314                 });\r
 315         }\r
 316 \r
 317         function protectElements( html )\r
 318         {\r
 319                 return html.replace( protectElementsRegex, function( match )\r
 320                         {\r
 321                                 return '<cke:encoded>' + encodeURIComponent( match ) + '</cke:encoded>';\r
 322                         });\r
 323         }\r
 324 \r
 325         function unprotectElements( html )\r
 326         {\r
 327                 return html.replace( encodedElementsRegex, function( match, encoded )\r
 328                         {\r
 329                                 return decodeURIComponent( encoded );\r
 330                         });\r
 331         }\r
 332 \r
 333         function protectElementsNames( html )\r
 334         {\r
 335                 return html.replace( protectElementNamesRegex, '$1cke:$2');\r
 336         }\r
 337 \r
 338         function unprotectElementNames( html )\r
 339         {\r
 340                 return html.replace( unprotectElementNamesRegex, '$1$2' );\r
 341         }\r
 342 \r
 343         function protectSelfClosingElements( html )\r
 344         {\r
 345                 return html.replace( protectSelfClosingRegex, '<cke:$1$2></cke:$1>' );\r
 346         }\r
 347 \r
 348         function protectPreFormatted( html )\r
 349         {\r
 350                 return html.replace( /(<pre\b[^>]*>)(\r\n|\n)/g, '$1$2$2' );\r
 351         }\r
 352 \r
 353         function protectRealComments( html )\r
 354         {\r
 355                 return html.replace( /<!--(?!{cke_protected})[\s\S]+?-->/g, function( match )\r
 356                         {\r
 357                                 return '<!--' + protectedSourceMarker +\r
 358                                                 '{C}' +\r
 359                                                 encodeURIComponent( match ).replace( /--/g, '%2D%2D' ) +\r
 360                                                 '-->';\r
 361                         });\r
 362         }\r
 363 \r
 364         function unprotectRealComments( html )\r
 365         {\r
 366                 return html.replace( /<!--\{cke_protected\}\{C\}([\s\S]+?)-->/g, function( match, data )\r
 367                         {\r
 368                                 return decodeURIComponent( data );\r
 369                         });\r
 370         }\r
 371 \r
 372         function unprotectSource( html, editor )\r
 373         {\r
 374                 var store = editor._.dataStore;\r
 375 \r
 376                 return html.replace( /<!--\{cke_protected\}([\s\S]+?)-->/g, function( match, data )\r
 377                         {\r
 378                                 return decodeURIComponent( data );\r
 379                         }).replace( /\{cke_protected_(\d+)\}/g, function( match, id )\r
 380                         {\r
 381                                 return store && store[ id ] || '';\r
 382                         });\r
 383         }\r
 384 \r
 385         function protectSource( data, editor )\r
 386         {\r
 387                 var protectedHtml = [],\r
 388                         protectRegexes = editor.config.protectedSource,\r
 389                         store = editor._.dataStore || ( editor._.dataStore = { id : 1 } ),\r
 390                         tempRegex = /<\!--\{cke_temp(comment)?\}(\d*?)-->/g;\r
 391 \r
 392                 var regexes =\r
 393                         [\r
 394                                 // Script tags will also be forced to be protected, otherwise\r
 395                                 // IE will execute them.\r
 396                                 ( /<script[\s\S]*?<\/script>/gi ),\r
 397 \r
 398                                 // <noscript> tags (get lost in IE and messed up in FF).\r
 399                                 /<noscript[\s\S]*?<\/noscript>/gi\r
 400                         ]\r
 401                         .concat( protectRegexes );\r
 402 \r
 403                 // First of any other protection, we must protect all comments\r
 404                 // to avoid loosing them (of course, IE related).\r
 405                 // Note that we use a different tag for comments, as we need to\r
 406                 // transform them when applying filters.\r
 407                 data = data.replace( (/<!--[\s\S]*?-->/g), function( match )\r
 408                         {\r
 409                                 return  '<!--{cke_tempcomment}' + ( protectedHtml.push( match ) - 1 ) + '-->';\r
 410                         });\r
 411 \r
 412                 for ( var i = 0 ; i < regexes.length ; i++ )\r
 413                 {\r
 414                         data = data.replace( regexes[i], function( match )\r
 415                                 {\r
 416                                         match = match.replace( tempRegex,               // There could be protected source inside another one. (#3869).\r
 417                                                 function( $, isComment, id )\r
 418                                                 {\r
 419                                                         return protectedHtml[ id ];\r
 420                                                 }\r
 421                                         );\r
 422 \r
 423                                         // Avoid protecting over protected, e.g. /\{.*?\}/\r
 424                                         return ( /cke_temp(comment)?/ ).test( match ) ? match\r
 425                                                 : '<!--{cke_temp}' + ( protectedHtml.push( match ) - 1 ) + '-->';\r
 426                                 });\r
 427                 }\r
 428                 data = data.replace( tempRegex, function( $, isComment, id )\r
 429                         {\r
 430                                 return '<!--' + protectedSourceMarker +\r
 431                                                 ( isComment ? '{C}' : '' ) +\r
 432                                                 encodeURIComponent( protectedHtml[ id ] ).replace( /--/g, '%2D%2D' ) +\r
 433                                                 '-->';\r
 434                         }\r
 435                 );\r
 436 \r
 437                 // Different protection pattern is used for those that\r
 438                 // live in attributes to avoid from being HTML encoded.\r
 439                 return data.replace( /(['"]).*?\1/g, function ( match )\r
 440                 {\r
 441                         return match.replace( /<!--\{cke_protected\}([\s\S]+?)-->/g, function( match, data )\r
 442                         {\r
 443                                 store[ store.id ] = decodeURIComponent( data );\r
 444                                 return '{cke_protected_'+ ( store.id++ )  + '}';\r
 445                         });\r
 446                 });\r
 447         }\r
 448 \r
 449         CKEDITOR.plugins.add( 'htmldataprocessor',\r
 450         {\r
 451                 requires : [ 'htmlwriter' ],\r
 452 \r
 453                 init : function( editor )\r
 454                 {\r
 455                         var dataProcessor = editor.dataProcessor = new CKEDITOR.htmlDataProcessor( editor );\r
 456 \r
 457                         dataProcessor.writer.forceSimpleAmpersand = editor.config.forceSimpleAmpersand;\r
 458 \r
 459                         dataProcessor.dataFilter.addRules( defaultDataFilterRules );\r
 460                         dataProcessor.dataFilter.addRules( defaultDataBlockFilterRules );\r
 461                         dataProcessor.htmlFilter.addRules( defaultHtmlFilterRules );\r
 462 \r
 463                         var defaultHtmlBlockFilterRules = { elements : {} };\r
 464                         for ( i in blockLikeTags )\r
 465                                 defaultHtmlBlockFilterRules.elements[ i ] = getBlockExtension( true, editor.config.fillEmptyBlocks );\r
 466 \r
 467                         dataProcessor.htmlFilter.addRules( defaultHtmlBlockFilterRules );\r
 468                 },\r
 469 \r
 470                 onLoad : function()\r
 471                 {\r
 472                         ! ( 'fillEmptyBlocks' in CKEDITOR.config ) && ( CKEDITOR.config.fillEmptyBlocks = 1 );\r
 473                 }\r
 474         });\r
 475 \r
 476         CKEDITOR.htmlDataProcessor = function( editor )\r
 477         {\r
 478                 this.editor = editor;\r
 479 \r
 480                 this.writer = new CKEDITOR.htmlWriter();\r
 481                 this.dataFilter = new CKEDITOR.htmlParser.filter();\r
 482                 this.htmlFilter = new CKEDITOR.htmlParser.filter();\r
 483         };\r
 484 \r
 485         CKEDITOR.htmlDataProcessor.prototype =\r
 486         {\r
 487                 toHtml : function( data, fixForBody )\r
 488                 {\r
 489                         // The source data is already HTML, but we need to clean\r
 490                         // it up and apply the filter.\r
 491 \r
 492                         data = protectSource( data, this.editor );\r
 493 \r
 494                         // Before anything, we must protect the URL attributes as the\r
 495                         // browser may changing them when setting the innerHTML later in\r
 496                         // the code.\r
 497                         data = protectAttributes( data );\r
 498 \r
 499                         // Protect elements than can't be set inside a DIV. E.g. IE removes\r
 500                         // style tags from innerHTML. (#3710)\r
 501                         data = protectElements( data );\r
 502 \r
 503                         // Certain elements has problem to go through DOM operation, protect\r
 504                         // them by prefixing 'cke' namespace. (#3591)\r
 505                         data = protectElementsNames( data );\r
 506 \r
 507                         // All none-IE browsers ignore self-closed custom elements,\r
 508                         // protecting them into open-close. (#3591)\r
 509                         data = protectSelfClosingElements( data );\r
 510 \r
 511                         // Compensate one leading line break after <pre> open as browsers\r
 512                         // eat it up. (#5789)\r
 513                         data = protectPreFormatted( data );\r
 514 \r
 515                         // Call the browser to help us fixing a possibly invalid HTML\r
 516                         // structure.\r
 517                         var div = new CKEDITOR.dom.element( 'div' );\r
 518                         // Add fake character to workaround IE comments bug. (#3801)\r
 519                         div.setHtml( 'a' + data );\r
 520                         data = div.getHtml().substr( 1 );\r
 521 \r
 522                         // Unprotect "some" of the protected elements at this point.\r
 523                         data = unprotectElementNames( data );\r
 524 \r
 525                         data = unprotectElements( data );\r
 526 \r
 527                         // Restore the comments that have been protected, in this way they\r
 528                         // can be properly filtered.\r
 529                         data = unprotectRealComments( data );\r
 530 \r
 531                         // Now use our parser to make further fixes to the structure, as\r
 532                         // well as apply the filter.\r
 533                         var fragment = CKEDITOR.htmlParser.fragment.fromHtml( data, fixForBody ),\r
 534                                 writer = new CKEDITOR.htmlParser.basicWriter();\r
 535 \r
 536                         fragment.writeHtml( writer, this.dataFilter );\r
 537                         data = writer.getHtml( true );\r
 538 \r
 539                         // Protect the real comments again.\r
 540                         data = protectRealComments( data );\r
 541 \r
 542                         return data;\r
 543                 },\r
 544 \r
 545                 toDataFormat : function( html, fixForBody )\r
 546                 {\r
 547                         var writer = this.writer,\r
 548                                 fragment = CKEDITOR.htmlParser.fragment.fromHtml( html, fixForBody );\r
 549 \r
 550                         writer.reset();\r
 551 \r
 552                         fragment.writeHtml( writer, this.htmlFilter );\r
 553 \r
 554                         var data = writer.getHtml( true );\r
 555 \r
 556                         // Restore those non-HTML protected source. (#4475,#4880)\r
 557                         data = unprotectRealComments( data );\r
 558                         data = unprotectSource( data, this.editor );\r
 559 \r
 560                         return data;\r
 561                 }\r
 562         };\r
 563 })();\r
 564 \r
 565 /**\r
 566  * Whether to force using "&" instead of "&amp;amp;" in elements attributes\r
 567  * values, it's not recommended to change this setting for compliance with the\r
 568  * W3C XHTML 1.0 standards (<a href="http://www.w3.org/TR/xhtml1/#C_12">C.12, XHTML 1.0</a>).\r
 569  * @name CKEDITOR.config.forceSimpleAmpersand\r
 570  * @name CKEDITOR.config.forceSimpleAmpersand\r
 571  * @type Boolean\r
 572  * @default false\r
 573  * @example\r
 574  * config.forceSimpleAmpersand = false;\r
 575  */\r
 576 \r
 577 /**\r
 578  * Whether a filler text (non-breaking space entity - &nbsp;) will be inserted into empty block elements in HTML output,\r
 579  * this is used to render block elements properly with line-height; When a function is instead specified,\r
 580  * it'll be passed a {@link CKEDITOR.htmlParser.element} to decide whether adding the filler text\r
 581  * by expecting a boolean return value.\r
 582  * @name CKEDITOR.config.fillEmptyBlocks\r
 583  * @since 3.5\r
 584  * @type Boolean\r
 585  * @default true\r
 586  * @example\r
 587  * config.fillEmptyBlocks = false;      // Prevent filler nodes in all empty blocks.\r
 588  *\r
 589  * // Prevent filler node only in float cleaners.\r
 590  * config.fillEmptyBlocks = function( element )\r
 591  * {\r
 592  *      if ( element.attributes[ 'class' ].indexOf ( 'clear-both' ) != -1 )\r
 593  *              return false;\r
 594  * }\r
 595  */\r