1 /*
  2 Copyright (c) 2003-2012, CKSource - Frederico Knabben. All rights reserved.
  3 For licensing, see LICENSE.html or http://ckeditor.com/license
  4 */
  5 
  6 CKEDITOR.plugins.add( 'styles',
  7 {
  8 	requires : [ 'selection' ],
  9 	init : function( editor )
 10 	{
 11 		// This doesn't look like correct, but it's the safest way to proper
 12 		// pass the disableReadonlyStyling configuration to the style system
 13 		// without having to change any method signature in the API. (#6103)
 14 		editor.on( 'contentDom', function()
 15 			{
 16 				editor.document.setCustomData( 'cke_includeReadonly', !editor.config.disableReadonlyStyling );
 17 			});
 18 	}
 19 });
 20 
 21 /**
 22  * Registers a function to be called whenever the selection position changes in the
 23  * editing area. The current state is passed to the function. The possible
 24  * states are {@link CKEDITOR.TRISTATE_ON} and {@link CKEDITOR.TRISTATE_OFF}.
 25  * @param {CKEDITOR.style} style The style to be watched.
 26  * @param {Function} callback The function to be called.
 27  * @example
 28  * // Create a style object for the <b> element.
 29  * var style = new CKEDITOR.style( { element : 'b' } );
 30  * var editor = CKEDITOR.instances.editor1;
 31  * editor.attachStyleStateChange( style, function( state )
 32  *     {
 33  *         if ( state == CKEDITOR.TRISTATE_ON )
 34  *             alert( 'The current state for the B element is ON' );
 35  *         else
 36  *             alert( 'The current state for the B element is OFF' );
 37  *     });
 38  */
 39 CKEDITOR.editor.prototype.attachStyleStateChange = function( style, callback )
 40 {
 41 	// Try to get the list of attached callbacks.
 42 	var styleStateChangeCallbacks = this._.styleStateChangeCallbacks;
 43 
 44 	// If it doesn't exist, it means this is the first call. So, let's create
 45 	// all the structure to manage the style checks and the callback calls.
 46 	if ( !styleStateChangeCallbacks )
 47 	{
 48 		// Create the callbacks array.
 49 		styleStateChangeCallbacks = this._.styleStateChangeCallbacks = [];
 50 
 51 		// Attach to the selectionChange event, so we can check the styles at
 52 		// that point.
 53 		this.on( 'selectionChange', function( ev )
 54 			{
 55 				// Loop throw all registered callbacks.
 56 				for ( var i = 0 ; i < styleStateChangeCallbacks.length ; i++ )
 57 				{
 58 					var callback = styleStateChangeCallbacks[ i ];
 59 
 60 					// Check the current state for the style defined for that
 61 					// callback.
 62 					var currentState = callback.style.checkActive( ev.data.path ) ? CKEDITOR.TRISTATE_ON : CKEDITOR.TRISTATE_OFF;
 63 
 64 					// Call the callback function, passing the current
 65 					// state to it.
 66 					callback.fn.call( this, currentState );
 67 				}
 68 			});
 69 	}
 70 
 71 	// Save the callback info, so it can be checked on the next occurrence of
 72 	// selectionChange.
 73 	styleStateChangeCallbacks.push( { style : style, fn : callback } );
 74 };
 75 
 76 CKEDITOR.STYLE_BLOCK = 1;
 77 CKEDITOR.STYLE_INLINE = 2;
 78 CKEDITOR.STYLE_OBJECT = 3;
 79 
 80 (function()
 81 {
 82 	var blockElements	= { address:1,div:1,h1:1,h2:1,h3:1,h4:1,h5:1,h6:1,p:1,pre:1,section:1,header:1,footer:1,nav:1,article:1,aside:1,figure:1,dialog:1,hgroup:1,time:1,meter:1,menu:1,command:1,keygen:1,output:1,progress:1,details:1,datagrid:1,datalist:1 },
 83 		objectElements	= { a:1,embed:1,hr:1,img:1,li:1,object:1,ol:1,table:1,td:1,tr:1,th:1,ul:1,dl:1,dt:1,dd:1,form:1,audio:1,video:1 };
 84 
 85 	var semicolonFixRegex = /\s*(?:;\s*|$)/,
 86 		varRegex = /#\((.+?)\)/g;
 87 
 88 	var notBookmark = CKEDITOR.dom.walker.bookmark( 0, 1 ),
 89 		nonWhitespaces = CKEDITOR.dom.walker.whitespaces( 1 );
 90 
 91 	CKEDITOR.style = function( styleDefinition, variablesValues )
 92 	{
 93 		if ( variablesValues )
 94 		{
 95 			styleDefinition = CKEDITOR.tools.clone( styleDefinition );
 96 
 97 			replaceVariables( styleDefinition.attributes, variablesValues );
 98 			replaceVariables( styleDefinition.styles, variablesValues );
 99 		}
100 
101 		var element = this.element = styleDefinition.element ?
102 				( typeof styleDefinition.element == 'string' ? styleDefinition.element.toLowerCase() : styleDefinition.element )
103 				: '*';
104 
105 		this.type =
106 			blockElements[ element ] ?
107 				CKEDITOR.STYLE_BLOCK
108 			: objectElements[ element ] ?
109 				CKEDITOR.STYLE_OBJECT
110 			:
111 				CKEDITOR.STYLE_INLINE;
112 
113 		// If the 'element' property is an object with a set of possible element, it will be applied like an object style: only to existing elements
114 		if ( typeof this.element == 'object' )
115 			this.type = CKEDITOR.STYLE_OBJECT;
116 
117 		this._ =
118 		{
119 			definition : styleDefinition
120 		};
121 	};
122 
123 	CKEDITOR.style.prototype =
124 	{
125 		apply : function( document )
126 		{
127 			applyStyle.call( this, document, false );
128 		},
129 
130 		remove : function( document )
131 		{
132 			applyStyle.call( this, document, true );
133 		},
134 
135 		applyToRange : function( range )
136 		{
137 			return ( this.applyToRange =
138 						this.type == CKEDITOR.STYLE_INLINE ?
139 							applyInlineStyle
140 						: this.type == CKEDITOR.STYLE_BLOCK ?
141 							applyBlockStyle
142 						: this.type == CKEDITOR.STYLE_OBJECT ?
143 							applyObjectStyle
144 						: null ).call( this, range );
145 		},
146 
147 		removeFromRange : function( range )
148 		{
149 			return ( this.removeFromRange =
150 						this.type == CKEDITOR.STYLE_INLINE ?
151 							removeInlineStyle
152 						: this.type == CKEDITOR.STYLE_BLOCK ?
153 							removeBlockStyle
154 						: this.type == CKEDITOR.STYLE_OBJECT ?
155 							removeObjectStyle
156 						: null ).call( this, range );
157 		},
158 
159 		applyToObject : function( element )
160 		{
161 			setupElement( element, this );
162 		},
163 
164 		/**
165 		 * Get the style state inside an element path. Returns "true" if the
166 		 * element is active in the path.
167 		 */
168 		checkActive : function( elementPath )
169 		{
170 			switch ( this.type )
171 			{
172 				case CKEDITOR.STYLE_BLOCK :
173 					return this.checkElementRemovable( elementPath.block || elementPath.blockLimit, true );
174 
175 				case CKEDITOR.STYLE_OBJECT :
176 				case CKEDITOR.STYLE_INLINE :
177 
178 					var elements = elementPath.elements;
179 
180 					for ( var i = 0, element ; i < elements.length ; i++ )
181 					{
182 						element = elements[ i ];
183 
184 						if ( this.type == CKEDITOR.STYLE_INLINE
185 							  && ( element == elementPath.block || element == elementPath.blockLimit ) )
186 							continue;
187 
188 						if( this.type == CKEDITOR.STYLE_OBJECT )
189 						{
190 							var name = element.getName();
191 							if ( !( typeof this.element == 'string' ? name == this.element : name in this.element ) )
192 								continue;
193 						}
194 
195 						if ( this.checkElementRemovable( element, true ) )
196 							return true;
197 					}
198 			}
199 			return false;
200 		},
201 
202 		/**
203 		 * Whether this style can be applied at the element path.
204  		 * @param elementPath
205 		 */
206 		checkApplicable : function( elementPath )
207 		{
208 			switch ( this.type )
209 			{
210 				case CKEDITOR.STYLE_INLINE :
211 				case CKEDITOR.STYLE_BLOCK :
212 					break;
213 
214 				case CKEDITOR.STYLE_OBJECT :
215 					return elementPath.lastElement.getAscendant( this.element, true );
216 			}
217 
218 			return true;
219 		},
220 
221 		// Checks if an element, or any of its attributes, is removable by the
222 		// current style definition.
223 		checkElementRemovable : function( element, fullMatch )
224 		{
225 			var def = this._.definition;
226 
227 			if ( !element || !def.ignoreReadonly && element.isReadOnly() )
228 				return false;
229 
230 			var attribs,
231 				name = element.getName();
232 
233 			// If the element name is the same as the style name.
234 			if ( typeof this.element == 'string' ? name == this.element : name in this.element )
235 			{
236 				// If no attributes are defined in the element.
237 				if ( !fullMatch && !element.hasAttributes() )
238 					return true;
239 
240 				attribs = getAttributesForComparison( def );
241 
242 				if ( attribs._length )
243 				{
244 					for ( var attName in attribs )
245 					{
246 						if ( attName == '_length' )
247 							continue;
248 
249 						var elementAttr = element.getAttribute( attName ) || '';
250 
251 						// Special treatment for 'style' attribute is required.
252 						if ( attName == 'style' ?
253 							compareCssText( attribs[ attName ], normalizeCssText( elementAttr, false ) )
254 							: attribs[ attName ] == elementAttr  )
255 						{
256 							if ( !fullMatch )
257 								return true;
258 						}
259 						else if ( fullMatch )
260 								return false;
261 					}
262 					if ( fullMatch )
263 						return true;
264 				}
265 				else
266 					return true;
267 			}
268 
269 			// Check if the element can be somehow overriden.
270 			var override = getOverrides( this )[ element.getName() ] ;
271 			if ( override )
272 			{
273 				// If no attributes have been defined, remove the element.
274 				if ( !( attribs = override.attributes ) )
275 					return true;
276 
277 				for ( var i = 0 ; i < attribs.length ; i++ )
278 				{
279 					attName = attribs[i][0];
280 					var actualAttrValue = element.getAttribute( attName );
281 					if ( actualAttrValue )
282 					{
283 						var attValue = attribs[i][1];
284 
285 						// Remove the attribute if:
286 						//    - The override definition value is null;
287 						//    - The override definition value is a string that
288 						//      matches the attribute value exactly.
289 						//    - The override definition value is a regex that
290 						//      has matches in the attribute value.
291 						if ( attValue === null ||
292 								( typeof attValue == 'string' && actualAttrValue == attValue ) ||
293 								attValue.test( actualAttrValue ) )
294 							return true;
295 					}
296 				}
297 			}
298 			return false;
299 		},
300 
301 		// Builds the preview HTML based on the styles definition.
302 		buildPreview : function( label )
303 		{
304 			var styleDefinition = this._.definition,
305 				html = [],
306 				elementName = styleDefinition.element;
307 
308 			// Avoid <bdo> in the preview.
309 			if ( elementName == 'bdo' )
310 				elementName = 'span';
311 
312 			html = [ '<', elementName ];
313 
314 			// Assign all defined attributes.
315 			var attribs	= styleDefinition.attributes;
316 			if ( attribs )
317 			{
318 				for ( var att in attribs )
319 				{
320 					html.push( ' ', att, '="', attribs[ att ], '"' );
321 				}
322 			}
323 
324 			// Assign the style attribute.
325 			var cssStyle = CKEDITOR.style.getStyleText( styleDefinition );
326 			if ( cssStyle )
327 				html.push( ' style="', cssStyle, '"' );
328 
329 			html.push( '>', ( label || styleDefinition.name ), '</', elementName, '>' );
330 
331 			return html.join( '' );
332 		}
333 	};
334 
335 	// Build the cssText based on the styles definition.
336 	CKEDITOR.style.getStyleText = function( styleDefinition )
337 	{
338 		// If we have already computed it, just return it.
339 		var stylesDef = styleDefinition._ST;
340 		if ( stylesDef )
341 			return stylesDef;
342 
343 		stylesDef = styleDefinition.styles;
344 
345 		// Builds the StyleText.
346 		var stylesText = ( styleDefinition.attributes && styleDefinition.attributes[ 'style' ] ) || '',
347 				specialStylesText = '';
348 
349 		if ( stylesText.length )
350 			stylesText = stylesText.replace( semicolonFixRegex, ';' );
351 
352 		for ( var style in stylesDef )
353 		{
354 			var styleVal = stylesDef[ style ],
355 					text = ( style + ':' + styleVal ).replace( semicolonFixRegex, ';' );
356 
357 			// Some browsers don't support 'inherit' property value, leave them intact. (#5242)
358 			if ( styleVal == 'inherit' )
359 				specialStylesText += text;
360 			else
361 				stylesText += text;
362 		}
363 
364 		// Browsers make some changes to the style when applying them. So, here
365 		// we normalize it to the browser format.
366 		if ( stylesText.length )
367 			stylesText = normalizeCssText( stylesText );
368 
369 		stylesText += specialStylesText;
370 
371 		// Return it, saving it to the next request.
372 		return ( styleDefinition._ST = stylesText );
373 	};
374 
375 	// Gets the parent element which blocks the styling for an element. This
376 	// can be done through read-only elements (contenteditable=false) or
377 	// elements with the "data-nostyle" attribute.
378 	function getUnstylableParent( element )
379 	{
380 		var unstylable,
381 			editable;
382 
383 		while ( ( element = element.getParent() ) )
384 		{
385 			if ( element.getName() == 'body' )
386 				break;
387 
388 			if ( element.getAttribute( 'data-nostyle' ) )
389 				unstylable = element;
390 			else if ( !editable )
391 			{
392 				var contentEditable = element.getAttribute( 'contentEditable' );
393 
394 				if ( contentEditable == 'false' )
395 					unstylable = element;
396 				else if ( contentEditable == 'true' )
397 					editable = 1;
398 			}
399 		}
400 
401 		return unstylable;
402 	}
403 
404 	function applyInlineStyle( range )
405 	{
406 		var document = range.document;
407 
408 		if ( range.collapsed )
409 		{
410 			// Create the element to be inserted in the DOM.
411 			var collapsedElement = getElement( this, document );
412 
413 			// Insert the empty element into the DOM at the range position.
414 			range.insertNode( collapsedElement );
415 
416 			// Place the selection right inside the empty element.
417 			range.moveToPosition( collapsedElement, CKEDITOR.POSITION_BEFORE_END );
418 
419 			return;
420 		}
421 
422 		var elementName = this.element;
423 		var def = this._.definition;
424 		var isUnknownElement;
425 
426 		// Indicates that fully selected read-only elements are to be included in the styling range.
427 		var ignoreReadonly = def.ignoreReadonly,
428 			includeReadonly = ignoreReadonly || def.includeReadonly;
429 
430 		// If the read-only inclusion is not available in the definition, try
431 		// to get it from the document data.
432 		if ( includeReadonly == undefined )
433 			includeReadonly = document.getCustomData( 'cke_includeReadonly' );
434 
435 		// Get the DTD definition for the element. Defaults to "span".
436 		var dtd = CKEDITOR.dtd[ elementName ] || ( isUnknownElement = true, CKEDITOR.dtd.span );
437 
438 		// Expand the range.
439 		range.enlarge( CKEDITOR.ENLARGE_ELEMENT, 1 );
440 		range.trim();
441 
442 		// Get the first node to be processed and the last, which concludes the
443 		// processing.
444 		var boundaryNodes = range.createBookmark(),
445 			firstNode = boundaryNodes.startNode,
446 			lastNode = boundaryNodes.endNode;
447 
448 		var currentNode = firstNode;
449 
450 		var styleRange;
451 
452 		if ( !ignoreReadonly )
453 		{
454 			// Check if the boundaries are inside non stylable elements.
455 			var firstUnstylable = getUnstylableParent( firstNode ),
456 					lastUnstylable = getUnstylableParent( lastNode );
457 
458 			// If the first element can't be styled, we'll start processing right
459 			// after its unstylable root.
460 			if ( firstUnstylable )
461 				currentNode = firstUnstylable.getNextSourceNode( true );
462 
463 			// If the last element can't be styled, we'll stop processing on its
464 			// unstylable root.
465 			if ( lastUnstylable )
466 				lastNode = lastUnstylable;
467 		}
468 
469 		// Do nothing if the current node now follows the last node to be processed.
470 		if ( currentNode.getPosition( lastNode ) == CKEDITOR.POSITION_FOLLOWING )
471 			currentNode = 0;
472 
473 		while ( currentNode )
474 		{
475 			var applyStyle = false;
476 
477 			if ( currentNode.equals( lastNode ) )
478 			{
479 				currentNode = null;
480 				applyStyle = true;
481 			}
482 			else
483 			{
484 				var nodeType = currentNode.type;
485 				var nodeName = nodeType == CKEDITOR.NODE_ELEMENT ? currentNode.getName() : null;
486 				var nodeIsReadonly = nodeName && ( currentNode.getAttribute( 'contentEditable' ) == 'false' );
487 				var nodeIsNoStyle = nodeName && currentNode.getAttribute( 'data-nostyle' );
488 
489 				if ( nodeName && currentNode.data( 'cke-bookmark' ) )
490 				{
491 					currentNode = currentNode.getNextSourceNode( true );
492 					continue;
493 				}
494 
495 				// Check if the current node can be a child of the style element.
496 				if ( !nodeName || ( dtd[ nodeName ]
497 					&& !nodeIsNoStyle
498 					&& ( !nodeIsReadonly || includeReadonly )
499 					&& ( currentNode.getPosition( lastNode ) | CKEDITOR.POSITION_PRECEDING | CKEDITOR.POSITION_IDENTICAL | CKEDITOR.POSITION_IS_CONTAINED ) == ( CKEDITOR.POSITION_PRECEDING + CKEDITOR.POSITION_IDENTICAL + CKEDITOR.POSITION_IS_CONTAINED )
500 					&& ( !def.childRule || def.childRule( currentNode ) ) ) )
501 				{
502 					var currentParent = currentNode.getParent();
503 
504 					// Check if the style element can be a child of the current
505 					// node parent or if the element is not defined in the DTD.
506 					if ( currentParent
507 						&& ( ( currentParent.getDtd() || CKEDITOR.dtd.span )[ elementName ] || isUnknownElement )
508 						&& ( !def.parentRule || def.parentRule( currentParent ) ) )
509 					{
510 						// This node will be part of our range, so if it has not
511 						// been started, place its start right before the node.
512 						// In the case of an element node, it will be included
513 						// only if it is entirely inside the range.
514 						if ( !styleRange && ( !nodeName || !CKEDITOR.dtd.$removeEmpty[ nodeName ] || ( currentNode.getPosition( lastNode ) | CKEDITOR.POSITION_PRECEDING | CKEDITOR.POSITION_IDENTICAL | CKEDITOR.POSITION_IS_CONTAINED ) == ( CKEDITOR.POSITION_PRECEDING + CKEDITOR.POSITION_IDENTICAL + CKEDITOR.POSITION_IS_CONTAINED ) ) )
515 						{
516 							styleRange = new CKEDITOR.dom.range( document );
517 							styleRange.setStartBefore( currentNode );
518 						}
519 
520 						// Non element nodes, readonly elements, or empty
521 						// elements can be added completely to the range.
522 						if ( nodeType == CKEDITOR.NODE_TEXT || nodeIsReadonly || ( nodeType == CKEDITOR.NODE_ELEMENT && !currentNode.getChildCount() ) )
523 						{
524 							var includedNode = currentNode;
525 							var parentNode;
526 
527 							// This node is about to be included completelly, but,
528 							// if this is the last node in its parent, we must also
529 							// check if the parent itself can be added completelly
530 							// to the range, otherwise apply the style immediately.
531 							while ( ( applyStyle = !includedNode.getNext( notBookmark ) )
532 								&& ( parentNode = includedNode.getParent(), dtd[ parentNode.getName() ] )
533 								&& ( parentNode.getPosition( firstNode ) | CKEDITOR.POSITION_FOLLOWING | CKEDITOR.POSITION_IDENTICAL | CKEDITOR.POSITION_IS_CONTAINED ) == ( CKEDITOR.POSITION_FOLLOWING + CKEDITOR.POSITION_IDENTICAL + CKEDITOR.POSITION_IS_CONTAINED )
534 								&& ( !def.childRule || def.childRule( parentNode ) ) )
535 							{
536 								includedNode = parentNode;
537 							}
538 
539 							styleRange.setEndAfter( includedNode );
540 
541 						}
542 					}
543 					else
544 						applyStyle = true;
545 				}
546 				else
547 					applyStyle = true;
548 
549 				// Get the next node to be processed.
550 				currentNode = currentNode.getNextSourceNode( nodeIsNoStyle || nodeIsReadonly );
551 			}
552 
553 			// Apply the style if we have something to which apply it.
554 			if ( applyStyle && styleRange && !styleRange.collapsed )
555 			{
556 				// Build the style element, based on the style object definition.
557 				var styleNode = getElement( this, document ),
558 					styleHasAttrs = styleNode.hasAttributes();
559 
560 				// Get the element that holds the entire range.
561 				var parent = styleRange.getCommonAncestor();
562 
563 				var removeList = {
564 					styles : {},
565 					attrs : {},
566 					// Styles cannot be removed.
567 					blockedStyles : {},
568 					// Attrs cannot be removed.
569 					blockedAttrs : {}
570 				};
571 
572 				var attName, styleName, value;
573 
574 				// Loop through the parents, removing the redundant attributes
575 				// from the element to be applied.
576 				while ( styleNode && parent )
577 				{
578 					if ( parent.getName() == elementName )
579 					{
580 						for ( attName in def.attributes )
581 						{
582 							if ( removeList.blockedAttrs[ attName ] || !( value = parent.getAttribute( styleName ) ) )
583 								continue;
584 
585 							if ( styleNode.getAttribute( attName ) == value )
586 								removeList.attrs[ attName ] = 1;
587 							else
588 								removeList.blockedAttrs[ attName ] = 1;
589 						}
590 
591 						for ( styleName in def.styles )
592 						{
593 							if ( removeList.blockedStyles[ styleName ] || !( value = parent.getStyle( styleName ) ) )
594 								continue;
595 
596 							if ( styleNode.getStyle( styleName ) == value )
597 								removeList.styles[ styleName ] = 1;
598 							else
599 								removeList.blockedStyles[ styleName ] = 1;
600 						}
601 					}
602 
603 					parent = parent.getParent();
604 				}
605 
606 				for ( attName in removeList.attrs )
607 					styleNode.removeAttribute( attName );
608 
609 				for ( styleName in removeList.styles )
610 					styleNode.removeStyle( styleName );
611 
612 				if ( styleHasAttrs && !styleNode.hasAttributes() )
613 					styleNode = null;
614 
615 				if ( styleNode )
616 				{
617 					// Move the contents of the range to the style element.
618 					styleRange.extractContents().appendTo( styleNode );
619 
620 					// Here we do some cleanup, removing all duplicated
621 					// elements from the style element.
622 					removeFromInsideElement( this, styleNode );
623 
624 					// Insert it into the range position (it is collapsed after
625 					// extractContents.
626 					styleRange.insertNode( styleNode );
627 
628 					// Let's merge our new style with its neighbors, if possible.
629 					styleNode.mergeSiblings();
630 
631 					// As the style system breaks text nodes constantly, let's normalize
632 					// things for performance.
633 					// With IE, some paragraphs get broken when calling normalize()
634 					// repeatedly. Also, for IE, we must normalize body, not documentElement.
635 					// IE is also known for having a "crash effect" with normalize().
636 					// We should try to normalize with IE too in some way, somewhere.
637 					if ( !CKEDITOR.env.ie )
638 						styleNode.$.normalize();
639 				}
640 				// Style already inherit from parents, left just to clear up any internal overrides. (#5931)
641 				else
642 				{
643 					styleNode = new CKEDITOR.dom.element( 'span' );
644 					styleRange.extractContents().appendTo( styleNode );
645 					styleRange.insertNode( styleNode );
646 					removeFromInsideElement( this, styleNode );
647 					styleNode.remove( true );
648 				}
649 
650 				// Style applied, let's release the range, so it gets
651 				// re-initialization in the next loop.
652 				styleRange = null;
653 			}
654 		}
655 
656 		// Remove the bookmark nodes.
657 		range.moveToBookmark( boundaryNodes );
658 
659 		// Minimize the result range to exclude empty text nodes. (#5374)
660 		range.shrink( CKEDITOR.SHRINK_TEXT );
661 	}
662 
663 	function removeInlineStyle( range )
664 	{
665 		/*
666 		 * Make sure our range has included all "collpased" parent inline nodes so
667 		 * that our operation logic can be simpler.
668 		 */
669 		range.enlarge( CKEDITOR.ENLARGE_ELEMENT, 1 );
670 
671 		var bookmark = range.createBookmark(),
672 			startNode = bookmark.startNode;
673 
674 		if ( range.collapsed )
675 		{
676 
677 			var startPath = new CKEDITOR.dom.elementPath( startNode.getParent() ),
678 				// The topmost element in elementspatch which we should jump out of.
679 				boundaryElement;
680 
681 
682 			for ( var i = 0, element ; i < startPath.elements.length
683 					&& ( element = startPath.elements[i] ) ; i++ )
684 			{
685 				/*
686 				 * 1. If it's collaped inside text nodes, try to remove the style from the whole element.
687 				 *
688 				 * 2. Otherwise if it's collapsed on element boundaries, moving the selection
689 				 *  outside the styles instead of removing the whole tag,
690 				 *  also make sure other inner styles were well preserverd.(#3309)
691 				 */
692 				if ( element == startPath.block || element == startPath.blockLimit )
693 					break;
694 
695 				if ( this.checkElementRemovable( element ) )
696 				{
697 					var isStart;
698 
699 					if ( range.collapsed && (
700 						 range.checkBoundaryOfElement( element, CKEDITOR.END ) ||
701 						 ( isStart = range.checkBoundaryOfElement( element, CKEDITOR.START ) ) ) )
702 					{
703 						boundaryElement = element;
704 						boundaryElement.match = isStart ? 'start' : 'end';
705 					}
706 					else
707 					{
708 						/*
709 						 * Before removing the style node, there may be a sibling to the style node
710 						 * that's exactly the same to the one to be removed. To the user, it makes
711 						 * no difference that they're separate entities in the DOM tree. So, merge
712 						 * them before removal.
713 						 */
714 						element.mergeSiblings();
715 						if ( element.getName() == this.element )
716 							removeFromElement( this, element );
717 						else
718 							removeOverrides( element, getOverrides( this )[ element.getName() ] );
719 					}
720 				}
721 			}
722 
723 			// Re-create the style tree after/before the boundary element,
724 			// the replication start from bookmark start node to define the
725 			// new range.
726 			if ( boundaryElement )
727 			{
728 				var clonedElement = startNode;
729 				for ( i = 0 ;; i++ )
730 				{
731 					var newElement = startPath.elements[ i ];
732 					if ( newElement.equals( boundaryElement ) )
733 						break;
734 					// Avoid copying any matched element.
735 					else if ( newElement.match )
736 						continue;
737 					else
738 						newElement = newElement.clone();
739 					newElement.append( clonedElement );
740 					clonedElement = newElement;
741 				}
742 				clonedElement[ boundaryElement.match == 'start' ?
743 							'insertBefore' : 'insertAfter' ]( boundaryElement );
744 			}
745 		}
746 		else
747 		{
748 			/*
749 			 * Now our range isn't collapsed. Lets walk from the start node to the end
750 			 * node via DFS and remove the styles one-by-one.
751 			 */
752 			var endNode = bookmark.endNode,
753 				me = this;
754 
755 			/*
756 			 * Find out the style ancestor that needs to be broken down at startNode
757 			 * and endNode.
758 			 */
759 			function breakNodes()
760 			{
761 				var startPath = new CKEDITOR.dom.elementPath( startNode.getParent() ),
762 					endPath = new CKEDITOR.dom.elementPath( endNode.getParent() ),
763 					breakStart = null,
764 					breakEnd = null;
765 				for ( var i = 0 ; i < startPath.elements.length ; i++ )
766 				{
767 					var element = startPath.elements[ i ];
768 
769 					if ( element == startPath.block || element == startPath.blockLimit )
770 						break;
771 
772 					if ( me.checkElementRemovable( element ) )
773 						breakStart = element;
774 				}
775 				for ( i = 0 ; i < endPath.elements.length ; i++ )
776 				{
777 					element = endPath.elements[ i ];
778 
779 					if ( element == endPath.block || element == endPath.blockLimit )
780 						break;
781 
782 					if ( me.checkElementRemovable( element ) )
783 						breakEnd = element;
784 				}
785 
786 				if ( breakEnd )
787 					endNode.breakParent( breakEnd );
788 				if ( breakStart )
789 					startNode.breakParent( breakStart );
790 			}
791 			breakNodes();
792 
793 			// Now, do the DFS walk.
794 			var currentNode = startNode;
795 			while ( !currentNode.equals( endNode ) )
796 			{
797 				/*
798 				 * Need to get the next node first because removeFromElement() can remove
799 				 * the current node from DOM tree.
800 				 */
801 				var nextNode = currentNode.getNextSourceNode();
802 				if ( currentNode.type == CKEDITOR.NODE_ELEMENT && this.checkElementRemovable( currentNode ) )
803 				{
804 					// Remove style from element or overriding element.
805 					if ( currentNode.getName() == this.element )
806 						removeFromElement( this, currentNode );
807 					else
808 						removeOverrides( currentNode, getOverrides( this )[ currentNode.getName() ] );
809 
810 					/*
811 					 * removeFromElement() may have merged the next node with something before
812 					 * the startNode via mergeSiblings(). In that case, the nextNode would
813 					 * contain startNode and we'll have to call breakNodes() again and also
814 					 * reassign the nextNode to something after startNode.
815 					 */
816 					if ( nextNode.type == CKEDITOR.NODE_ELEMENT && nextNode.contains( startNode ) )
817 					{
818 						breakNodes();
819 						nextNode = startNode.getNext();
820 					}
821 				}
822 				currentNode = nextNode;
823 			}
824 		}
825 
826 		range.moveToBookmark( bookmark );
827 	}
828 
829 	function applyObjectStyle( range )
830 	{
831 		var root = range.getCommonAncestor( true, true ),
832 			element = root.getAscendant( this.element, true );
833 		element && !element.isReadOnly() && setupElement( element, this );
834 	}
835 
836 	function removeObjectStyle( range )
837 	{
838 		var root = range.getCommonAncestor( true, true ),
839 			element = root.getAscendant( this.element, true );
840 
841 		if ( !element )
842 			return;
843 
844 		var style = this,
845 			def = style._.definition,
846 			attributes = def.attributes;
847 
848 		// Remove all defined attributes.
849 		if ( attributes )
850 		{
851 			for ( var att in attributes )
852 			{
853 				element.removeAttribute( att, attributes[ att ] );
854 			}
855 		}
856 
857 		// Assign all defined styles.
858 		if ( def.styles )
859 		{
860 			for ( var i in def.styles )
861 			{
862 				if ( !def.styles.hasOwnProperty( i ) )
863 					continue;
864 
865 				element.removeStyle( i );
866 			}
867 		}
868 	}
869 
870 	function applyBlockStyle( range )
871 	{
872 		// Serializible bookmarks is needed here since
873 		// elements may be merged.
874 		var bookmark = range.createBookmark( true );
875 
876 		var iterator = range.createIterator();
877 		iterator.enforceRealBlocks = true;
878 
879 		// make recognize <br /> tag as a separator in ENTER_BR mode (#5121)
880 		if ( this._.enterMode )
881 			iterator.enlargeBr = ( this._.enterMode != CKEDITOR.ENTER_BR );
882 
883 		var block;
884 		var doc = range.document;
885 		var previousPreBlock;
886 
887 		while ( ( block = iterator.getNextParagraph() ) )		// Only one =
888 		{
889 			if ( !block.isReadOnly() )
890 			{
891 				var newBlock = getElement( this, doc, block );
892 				replaceBlock( block, newBlock );
893 			}
894 		}
895 
896 		range.moveToBookmark( bookmark );
897 	}
898 
899 	function removeBlockStyle( range )
900 	{
901 		// Serializible bookmarks is needed here since
902 		// elements may be merged.
903 		var bookmark = range.createBookmark( 1 );
904 
905 		var iterator = range.createIterator();
906 		iterator.enforceRealBlocks = true;
907 		iterator.enlargeBr = this._.enterMode != CKEDITOR.ENTER_BR;
908 
909 		var block;
910 		while ( ( block = iterator.getNextParagraph() ) )
911 		{
912 			if ( this.checkElementRemovable( block ) )
913 			{
914 				// <pre> get special treatment.
915 				if ( block.is( 'pre' ) )
916 				{
917 					var newBlock = this._.enterMode == CKEDITOR.ENTER_BR ?
918 								null : range.document.createElement(
919 									this._.enterMode == CKEDITOR.ENTER_P ? 'p' : 'div' );
920 
921 					newBlock && block.copyAttributes( newBlock );
922 					replaceBlock( block, newBlock );
923 				}
924 				else
925 					 removeFromElement( this, block, 1 );
926 			}
927 		}
928 
929 		range.moveToBookmark( bookmark );
930 	}
931 
932 	// Replace the original block with new one, with special treatment
933 	// for <pre> blocks to make sure content format is well preserved, and merging/splitting adjacent
934 	// when necessary.(#3188)
935 	function replaceBlock( block, newBlock )
936 	{
937 		// Block is to be removed, create a temp element to
938 		// save contents.
939 		var removeBlock = !newBlock;
940 		if ( removeBlock )
941 		{
942 			newBlock = block.getDocument().createElement( 'div' );
943 			block.copyAttributes( newBlock );
944 		}
945 
946 		var newBlockIsPre	= newBlock && newBlock.is( 'pre' );
947 		var blockIsPre	= block.is( 'pre' );
948 
949 		var isToPre	= newBlockIsPre && !blockIsPre;
950 		var isFromPre	= !newBlockIsPre && blockIsPre;
951 
952 		if ( isToPre )
953 			newBlock = toPre( block, newBlock );
954 		else if ( isFromPre )
955 			// Split big <pre> into pieces before start to convert.
956 			newBlock = fromPres( removeBlock ?
957 						[ block.getHtml() ] : splitIntoPres( block ), newBlock );
958 		else
959 			block.moveChildren( newBlock );
960 
961 		newBlock.replace( block );
962 
963 		if ( newBlockIsPre )
964 		{
965 			// Merge previous <pre> blocks.
966 			mergePre( newBlock );
967 		}
968 		else if ( removeBlock )
969 			removeNoAttribsElement( newBlock );
970 	}
971 
972 	/**
973 	 * Merge a <pre> block with a previous sibling if available.
974 	 */
975 	function mergePre( preBlock )
976 	{
977 		var previousBlock;
978 		if ( !( ( previousBlock = preBlock.getPrevious( nonWhitespaces ) )
979 				 && previousBlock.is
980 				 && previousBlock.is( 'pre') ) )
981 			return;
982 
983 		// Merge the previous <pre> block contents into the current <pre>
984 		// block.
985 		//
986 		// Another thing to be careful here is that currentBlock might contain
987 		// a '\n' at the beginning, and previousBlock might contain a '\n'
988 		// towards the end. These new lines are not normally displayed but they
989 		// become visible after merging.
990 		var mergedHtml = replace( previousBlock.getHtml(), /\n$/, '' ) + '\n\n' +
991 				replace( preBlock.getHtml(), /^\n/, '' ) ;
992 
993 		// Krugle: IE normalizes innerHTML from <pre>, breaking whitespaces.
994 		if ( CKEDITOR.env.ie )
995 			preBlock.$.outerHTML = '<pre>' + mergedHtml + '</pre>';
996 		else
997 			preBlock.setHtml( mergedHtml );
998 
999 		previousBlock.remove();
1000 	}
1001 
1002 	/**
1003 	 * Split into multiple <pre> blocks separated by double line-break.
1004 	 * @param preBlock
1005 	 */
1006 	function splitIntoPres( preBlock )
1007 	{
1008 		// Exclude the ones at header OR at tail,
1009 		// and ignore bookmark content between them.
1010 		var duoBrRegex = /(\S\s*)\n(?:\s|(<span[^>]+data-cke-bookmark.*?\/span>))*\n(?!$)/gi,
1011 			blockName = preBlock.getName(),
1012 			splitedHtml = replace( preBlock.getOuterHtml(),
1013 				duoBrRegex,
1014 				function( match, charBefore, bookmark )
1015 				{
1016 				  return charBefore + '</pre>' + bookmark + '<pre>';
1017 				} );
1018 
1019 		var pres = [];
1020 		splitedHtml.replace( /<pre\b.*?>([\s\S]*?)<\/pre>/gi, function( match, preContent ){
1021 			pres.push( preContent );
1022 		} );
1023 		return pres;
1024 	}
1025 
1026 	// Wrapper function of String::replace without considering of head/tail bookmarks nodes.
1027 	function replace( str, regexp, replacement )
1028 	{
1029 		var headBookmark = '',
1030 			tailBookmark = '';
1031 
1032 		str = str.replace( /(^<span[^>]+data-cke-bookmark.*?\/span>)|(<span[^>]+data-cke-bookmark.*?\/span>$)/gi,
1033 			function( str, m1, m2 ){
1034 					m1 && ( headBookmark = m1 );
1035 					m2 && ( tailBookmark = m2 );
1036 				return '';
1037 			} );
1038 		return headBookmark + str.replace( regexp, replacement ) + tailBookmark;
1039 	}
1040 
1041 	/**
1042 	 * Converting a list of <pre> into blocks with format well preserved.
1043 	 */
1044 	function fromPres( preHtmls, newBlock )
1045 	{
1046 		var docFrag;
1047 		if ( preHtmls.length > 1 )
1048 			docFrag = new CKEDITOR.dom.documentFragment( newBlock.getDocument() );
1049 
1050 		for ( var i = 0 ; i < preHtmls.length ; i++ )
1051 		{
1052 			var blockHtml = preHtmls[ i ];
1053 
1054 			// 1. Trim the first and last line-breaks immediately after and before <pre>,
1055 			// they're not visible.
1056 			 blockHtml =  blockHtml.replace( /(\r\n|\r)/g, '\n' ) ;
1057 			 blockHtml = replace(  blockHtml, /^[ \t]*\n/, '' ) ;
1058 			 blockHtml = replace(  blockHtml, /\n$/, '' ) ;
1059 			// 2. Convert spaces or tabs at the beginning or at the end to  
1060 			 blockHtml = replace(  blockHtml, /^[ \t]+|[ \t]+$/g, function( match, offset, s )
1061 					{
1062 						if ( match.length == 1 )	// one space, preserve it
1063 							return ' ' ;
1064 						else if ( !offset )		// beginning of block
1065 							return CKEDITOR.tools.repeat( ' ', match.length - 1 ) + ' ';
1066 						else				// end of block
1067 							return ' ' + CKEDITOR.tools.repeat( ' ', match.length - 1 );
1068 					} ) ;
1069 
1070 			// 3. Convert \n to <BR>.
1071 			// 4. Convert contiguous (i.e. non-singular) spaces or tabs to  
1072 			 blockHtml =  blockHtml.replace( /\n/g, '<br>' ) ;
1073 			 blockHtml =  blockHtml.replace( /[ \t]{2,}/g,
1074 					function ( match )
1075 					{
1076 						return CKEDITOR.tools.repeat( ' ', match.length - 1 ) + ' ' ;
1077 					} ) ;
1078 
1079 			if ( docFrag )
1080 			{
1081 				var newBlockClone = newBlock.clone();
1082 				newBlockClone.setHtml(  blockHtml );
1083 				docFrag.append( newBlockClone );
1084 			}
1085 			else
1086 				newBlock.setHtml( blockHtml );
1087 		}
1088 
1089 		return docFrag || newBlock;
1090 	}
1091 
1092 	/**
1093 	 * Converting from a non-PRE block to a PRE block in formatting operations.
1094 	 */
1095 	function toPre( block, newBlock )
1096 	{
1097 		var bogus = block.getBogus();
1098 		bogus && bogus.remove();
1099 
1100 		// First trim the block content.
1101 		var preHtml = block.getHtml();
1102 
1103 		// 1. Trim head/tail spaces, they're not visible.
1104 		preHtml = replace( preHtml, /(?:^[ \t\n\r]+)|(?:[ \t\n\r]+$)/g, '' );
1105 		// 2. Delete ANSI whitespaces immediately before and after <BR> because
1106 		//    they are not visible.
1107 		preHtml = preHtml.replace( /[ \t\r\n]*(<br[^>]*>)[ \t\r\n]*/gi, '$1' );
1108 		// 3. Compress other ANSI whitespaces since they're only visible as one
1109 		//    single space previously.
1110 		// 4. Convert   to spaces since   is no longer needed in <PRE>.
1111 		preHtml = preHtml.replace( /([ \t\n\r]+| )/g, ' ' );
1112 		// 5. Convert any <BR /> to \n. This must not be done earlier because
1113 		//    the \n would then get compressed.
1114 		preHtml = preHtml.replace( /<br\b[^>]*>/gi, '\n' );
1115 
1116 		// Krugle: IE normalizes innerHTML to <pre>, breaking whitespaces.
1117 		if ( CKEDITOR.env.ie )
1118 		{
1119 			var temp = block.getDocument().createElement( 'div' );
1120 			temp.append( newBlock );
1121 			newBlock.$.outerHTML =  '<pre>' + preHtml + '</pre>';
1122 			newBlock.copyAttributes( temp.getFirst() );
1123 			newBlock = temp.getFirst().remove();
1124 		}
1125 		else
1126 			newBlock.setHtml( preHtml );
1127 
1128 		return newBlock;
1129 	}
1130 
1131 	// Removes a style from an element itself, don't care about its subtree.
1132 	function removeFromElement( style, element )
1133 	{
1134 		var def = style._.definition,
1135 			attributes = def.attributes,
1136 			styles = def.styles,
1137 			overrides = getOverrides( style )[ element.getName() ],
1138 			// If the style is only about the element itself, we have to remove the element.
1139 			removeEmpty = CKEDITOR.tools.isEmpty( attributes ) && CKEDITOR.tools.isEmpty( styles );
1140 
1141 		// Remove definition attributes/style from the elemnt.
1142 		for ( var attName in attributes )
1143 		{
1144 			// The 'class' element value must match (#1318).
1145 			if ( ( attName == 'class' || style._.definition.fullMatch )
1146 				&& element.getAttribute( attName ) != normalizeProperty( attName, attributes[ attName ] ) )
1147 				continue;
1148 			removeEmpty = element.hasAttribute( attName );
1149 			element.removeAttribute( attName );
1150 		}
1151 
1152 		for ( var styleName in styles )
1153 		{
1154 			// Full match style insist on having fully equivalence. (#5018)
1155 			if ( style._.definition.fullMatch
1156 				&& element.getStyle( styleName ) != normalizeProperty( styleName, styles[ styleName ], true ) )
1157 				continue;
1158 
1159 			removeEmpty = removeEmpty || !!element.getStyle( styleName );
1160 			element.removeStyle( styleName );
1161 		}
1162 
1163 		// Remove overrides, but don't remove the element if it's a block element
1164 		removeOverrides( element, overrides, blockElements[ element.getName() ] ) ;
1165 
1166 		if ( removeEmpty )
1167 		{
1168 			!CKEDITOR.dtd.$block[ element.getName() ] || style._.enterMode == CKEDITOR.ENTER_BR && !element.hasAttributes() ?
1169 				removeNoAttribsElement( element ) :
1170 				element.renameNode( style._.enterMode == CKEDITOR.ENTER_P ? 'p' : 'div' );
1171 		}
1172 	}
1173 
1174 	// Removes a style from inside an element.
1175 	function removeFromInsideElement( style, element )
1176 	{
1177 		var def = style._.definition,
1178 			attribs = def.attributes,
1179 			styles = def.styles,
1180 			overrides = getOverrides( style ),
1181 			innerElements = element.getElementsByTag( style.element );
1182 
1183 		for ( var i = innerElements.count(); --i >= 0 ; )
1184 			removeFromElement( style,  innerElements.getItem( i ) );
1185 
1186 		// Now remove any other element with different name that is
1187 		// defined to be overriden.
1188 		for ( var overrideElement in overrides )
1189 		{
1190 			if ( overrideElement != style.element )
1191 			{
1192 				innerElements = element.getElementsByTag( overrideElement ) ;
1193 				for ( i = innerElements.count() - 1 ; i >= 0 ; i-- )
1194 				{
1195 					var innerElement = innerElements.getItem( i );
1196 					removeOverrides( innerElement, overrides[ overrideElement ] ) ;
1197 				}
1198 			}
1199 		}
1200 	}
1201 
1202 	/**
1203 	 *  Remove overriding styles/attributes from the specific element.
1204 	 *  Note: Remove the element if no attributes remain.
1205 	 * @param {Object} element
1206 	 * @param {Object} overrides
1207 	 * @param {Boolean} Don't remove the element
1208 	 */
1209 	function removeOverrides( element, overrides, dontRemove )
1210 	{
1211 		var attributes = overrides && overrides.attributes ;
1212 
1213 		if ( attributes )
1214 		{
1215 			for ( var i = 0 ; i < attributes.length ; i++ )
1216 			{
1217 				var attName = attributes[i][0], actualAttrValue ;
1218 
1219 				if ( ( actualAttrValue = element.getAttribute( attName ) ) )
1220 				{
1221 					var attValue = attributes[i][1] ;
1222 
1223 					// Remove the attribute if:
1224 					//    - The override definition value is null ;
1225 					//    - The override definition valie is a string that
1226 					//      matches the attribute value exactly.
1227 					//    - The override definition value is a regex that
1228 					//      has matches in the attribute value.
1229 					if ( attValue === null ||
1230 							( attValue.test && attValue.test( actualAttrValue ) ) ||
1231 							( typeof attValue == 'string' && actualAttrValue == attValue ) )
1232 						element.removeAttribute( attName ) ;
1233 				}
1234 			}
1235 		}
1236 
1237 		if ( !dontRemove )
1238 			removeNoAttribsElement( element );
1239 	}
1240 
1241 	// If the element has no more attributes, remove it.
1242 	function removeNoAttribsElement( element )
1243 	{
1244 		// If no more attributes remained in the element, remove it,
1245 		// leaving its children.
1246 		if ( !element.hasAttributes() )
1247 		{
1248 			if ( CKEDITOR.dtd.$block[ element.getName() ] )
1249 			{
1250 				var previous = element.getPrevious( nonWhitespaces ),
1251 						next = element.getNext( nonWhitespaces );
1252 
1253 				if ( previous && ( previous.type == CKEDITOR.NODE_TEXT || !previous.isBlockBoundary( { br : 1 } ) ) )
1254 					element.append( 'br', 1 );
1255 				if ( next && ( next.type == CKEDITOR.NODE_TEXT || !next.isBlockBoundary( { br : 1 } ) ) )
1256 					element.append( 'br' );
1257 
1258 				element.remove( true );
1259 			}
1260 			else
1261 			{
1262 				// Removing elements may open points where merging is possible,
1263 				// so let's cache the first and last nodes for later checking.
1264 				var firstChild = element.getFirst();
1265 				var lastChild = element.getLast();
1266 
1267 				element.remove( true );
1268 
1269 				if ( firstChild )
1270 				{
1271 					// Check the cached nodes for merging.
1272 					firstChild.type == CKEDITOR.NODE_ELEMENT && firstChild.mergeSiblings();
1273 
1274 					if ( lastChild && !firstChild.equals( lastChild )
1275 							&& lastChild.type == CKEDITOR.NODE_ELEMENT )
1276 						lastChild.mergeSiblings();
1277 				}
1278 
1279 			}
1280 		}
1281 	}
1282 
1283 	function getElement( style, targetDocument, element )
1284 	{
1285 		var el,
1286 			def = style._.definition,
1287 			elementName = style.element;
1288 
1289 		// The "*" element name will always be a span for this function.
1290 		if ( elementName == '*' )
1291 			elementName = 'span';
1292 
1293 		// Create the element.
1294 		el = new CKEDITOR.dom.element( elementName, targetDocument );
1295 
1296 		// #6226: attributes should be copied before the new ones are applied
1297 		if ( element )
1298 			element.copyAttributes( el );
1299 
1300 		el = setupElement( el, style );
1301 
1302 		// Avoid ID duplication.
1303 		if ( targetDocument.getCustomData( 'doc_processing_style' ) && el.hasAttribute( 'id' ) )
1304 			el.removeAttribute( 'id' );
1305 		else
1306 			targetDocument.setCustomData( 'doc_processing_style', 1 );
1307 
1308 		return el;
1309 	}
1310 
1311 	function setupElement( el, style )
1312 	{
1313 		var def = style._.definition,
1314 			attributes = def.attributes,
1315 			styles = CKEDITOR.style.getStyleText( def );
1316 
1317 		// Assign all defined attributes.
1318 		if ( attributes )
1319 		{
1320 			for ( var att in attributes )
1321 			{
1322 				el.setAttribute( att, attributes[ att ] );
1323 			}
1324 		}
1325 
1326 		// Assign all defined styles.
1327 		if( styles )
1328 			el.setAttribute( 'style', styles );
1329 
1330 		return el;
1331 	}
1332 
1333 	function replaceVariables( list, variablesValues )
1334 	{
1335 		for ( var item in list )
1336 		{
1337 			list[ item ] = list[ item ].replace( varRegex, function( match, varName )
1338 				{
1339 					return variablesValues[ varName ];
1340 				});
1341 		}
1342 	}
1343 
1344 	// Returns an object that can be used for style matching comparison.
1345 	// Attributes names and values are all lowercased, and the styles get
1346 	// merged with the style attribute.
1347 	function getAttributesForComparison( styleDefinition )
1348 	{
1349 		// If we have already computed it, just return it.
1350 		var attribs = styleDefinition._AC;
1351 		if ( attribs )
1352 			return attribs;
1353 
1354 		attribs = {};
1355 
1356 		var length = 0;
1357 
1358 		// Loop through all defined attributes.
1359 		var styleAttribs = styleDefinition.attributes;
1360 		if ( styleAttribs )
1361 		{
1362 			for ( var styleAtt in styleAttribs )
1363 			{
1364 				length++;
1365 				attribs[ styleAtt ] = styleAttribs[ styleAtt ];
1366 			}
1367 		}
1368 
1369 		// Includes the style definitions.
1370 		var styleText = CKEDITOR.style.getStyleText( styleDefinition );
1371 		if ( styleText )
1372 		{
1373 			if ( !attribs[ 'style' ] )
1374 				length++;
1375 			attribs[ 'style' ] = styleText;
1376 		}
1377 
1378 		// Appends the "length" information to the object.
1379 		attribs._length = length;
1380 
1381 		// Return it, saving it to the next request.
1382 		return ( styleDefinition._AC = attribs );
1383 	}
1384 
1385 	/**
1386 	 * Get the the collection used to compare the elements and attributes,
1387 	 * defined in this style overrides, with other element. All information in
1388 	 * it is lowercased.
1389 	 * @param {CKEDITOR.style} style
1390 	 */
1391 	function getOverrides( style )
1392 	{
1393 		if ( style._.overrides )
1394 			return style._.overrides;
1395 
1396 		var overrides = ( style._.overrides = {} ),
1397 			definition = style._.definition.overrides;
1398 
1399 		if ( definition )
1400 		{
1401 			// The override description can be a string, object or array.
1402 			// Internally, well handle arrays only, so transform it if needed.
1403 			if ( !CKEDITOR.tools.isArray( definition ) )
1404 				definition = [ definition ];
1405 
1406 			// Loop through all override definitions.
1407 			for ( var i = 0 ; i < definition.length ; i++ )
1408 			{
1409 				var override = definition[i];
1410 				var elementName;
1411 				var overrideEl;
1412 				var attrs;
1413 
1414 				// If can be a string with the element name.
1415 				if ( typeof override == 'string' )
1416 					elementName = override.toLowerCase();
1417 				// Or an object.
1418 				else
1419 				{
1420 					elementName = override.element ? override.element.toLowerCase() : style.element;
1421 					attrs = override.attributes;
1422 				}
1423 
1424 				// We can have more than one override definition for the same
1425 				// element name, so we attempt to simply append information to
1426 				// it if it already exists.
1427 				overrideEl = overrides[ elementName ] || ( overrides[ elementName ] = {} );
1428 
1429 				if ( attrs )
1430 				{
1431 					// The returning attributes list is an array, because we
1432 					// could have different override definitions for the same
1433 					// attribute name.
1434 					var overrideAttrs = ( overrideEl.attributes = overrideEl.attributes || new Array() );
1435 					for ( var attName in attrs )
1436 					{
1437 						// Each item in the attributes array is also an array,
1438 						// where [0] is the attribute name and [1] is the
1439 						// override value.
1440 						overrideAttrs.push( [ attName.toLowerCase(), attrs[ attName ] ] );
1441 					}
1442 				}
1443 			}
1444 		}
1445 
1446 		return overrides;
1447 	}
1448 
1449 	// Make the comparison of attribute value easier by standardizing it.
1450 	function normalizeProperty( name, value, isStyle )
1451 	{
1452 		var temp = new CKEDITOR.dom.element( 'span' );
1453 		temp [ isStyle ? 'setStyle' : 'setAttribute' ]( name, value );
1454 		return temp[ isStyle ? 'getStyle' : 'getAttribute' ]( name );
1455 	}
1456 
1457 	// Make the comparison of style text easier by standardizing it.
1458 	function normalizeCssText( unparsedCssText, nativeNormalize )
1459 	{
1460 		var styleText;
1461 		if ( nativeNormalize !== false )
1462 		{
1463 			// Injects the style in a temporary span object, so the browser parses it,
1464 			// retrieving its final format.
1465 			var temp = new CKEDITOR.dom.element( 'span' );
1466 			temp.setAttribute( 'style', unparsedCssText );
1467 			styleText = temp.getAttribute( 'style' ) || '';
1468 		}
1469 		else
1470 			styleText = unparsedCssText;
1471 
1472 		// Normalize font-family property, ignore quotes and being case insensitive. (#7322)
1473 		// http://www.w3.org/TR/css3-fonts/#font-family-the-font-family-property
1474 		styleText = styleText.replace( /(font-family:)(.*?)(?=;|$)/, function ( match, prop, val )
1475 		{
1476 			var names = val.split( ',' );
1477 			for ( var i = 0; i < names.length; i++ )
1478 				names[ i ] = CKEDITOR.tools.trim( names[ i ].replace( /["']/g, '' ) );
1479 			return prop + names.join( ',' );
1480 		});
1481 
1482 		// Shrinking white-spaces around colon and semi-colon (#4147).
1483 		// Compensate tail semi-colon.
1484 		return styleText.replace( /\s*([;:])\s*/, '$1' )
1485 							 .replace( /([^\s;])$/, '$1;')
1486 				 			// Trimming spaces after comma(#4107),
1487 				 			// remove quotations(#6403),
1488 				 			// mostly for differences on "font-family".
1489 							 .replace( /,\s+/g, ',' )
1490 							 .replace( /\"/g,'' )
1491 							 .toLowerCase();
1492 	}
1493 
1494 	// Turn inline style text properties into one hash.
1495 	function parseStyleText( styleText )
1496 	{
1497 		var retval = {};
1498 		styleText
1499 		   .replace( /"/g, '"' )
1500 		   .replace( /\s*([^ :;]+)\s*:\s*([^;]+)\s*(?=;|$)/g, function( match, name, value )
1501 		{
1502 			retval[ name ] = value;
1503 		} );
1504 		return retval;
1505 	}
1506 
1507 	/**
1508 	 * Compare two bunch of styles, with the speciality that value 'inherit'
1509 	 * is treated as a wildcard which will match any value.
1510 	 * @param {Object|String} source
1511 	 * @param {Object|String} target
1512 	 */
1513 	function compareCssText( source, target )
1514 	{
1515 		typeof source == 'string' && ( source = parseStyleText( source ) );
1516 		typeof target == 'string' && ( target = parseStyleText( target ) );
1517 		for( var name in source )
1518 		{
1519 			if ( !( name in target &&
1520 					( target[ name ] == source[ name ]
1521 						|| source[ name ] == 'inherit'
1522 						|| target[ name ] == 'inherit' ) ) )
1523 			{
1524 				return false;
1525 			}
1526 		}
1527 		return true;
1528 	}
1529 
1530 	function applyStyle( document, remove )
1531 	{
1532 		var selection = document.getSelection(),
1533 			// Bookmark the range so we can re-select it after processing.
1534 			bookmarks = selection.createBookmarks( 1 ),
1535 			ranges = selection.getRanges(),
1536 			func = remove ? this.removeFromRange : this.applyToRange,
1537 			range;
1538 
1539 		var iterator = ranges.createIterator();
1540 		while ( ( range = iterator.getNextRange() ) )
1541 			func.call( this, range );
1542 
1543 		if ( bookmarks.length == 1 && bookmarks[ 0 ].collapsed )
1544 		{
1545 			selection.selectRanges( ranges );
1546 			document.getById( bookmarks[ 0 ].startNode ).remove();
1547 		}
1548 		else
1549 			selection.selectBookmarks( bookmarks );
1550 
1551 		document.removeCustomData( 'doc_processing_style' );
1552 	}
1553 })();
1554 
1555 CKEDITOR.styleCommand = function( style )
1556 {
1557 	this.style = style;
1558 };
1559 
1560 CKEDITOR.styleCommand.prototype.exec = function( editor )
1561 {
1562 	editor.focus();
1563 
1564 	var doc = editor.document;
1565 
1566 	if ( doc )
1567 	{
1568 		if ( this.state == CKEDITOR.TRISTATE_OFF )
1569 			this.style.apply( doc );
1570 		else if ( this.state == CKEDITOR.TRISTATE_ON )
1571 			this.style.remove( doc );
1572 	}
1573 
1574 	return !!doc;
1575 };
1576 
1577 /**
1578  * Manages styles registration and loading. See also {@link CKEDITOR.config.stylesSet}.
1579  * @namespace
1580  * @augments CKEDITOR.resourceManager
1581  * @constructor
1582  * @since 3.2
1583  * @example
1584  * // The set of styles for the <b>Styles</b> combo
1585  * CKEDITOR.stylesSet.add( 'default',
1586  * [
1587  * 	// Block Styles
1588  * 	{ name : 'Blue Title'		, element : 'h3', styles : { 'color' : 'Blue' } },
1589  * 	{ name : 'Red Title'		, element : 'h3', styles : { 'color' : 'Red' } },
1590  *
1591  * 	// Inline Styles
1592  * 	{ name : 'Marker: Yellow'	, element : 'span', styles : { 'background-color' : 'Yellow' } },
1593  * 	{ name : 'Marker: Green'	, element : 'span', styles : { 'background-color' : 'Lime' } },
1594  *
1595  * 	// Object Styles
1596  * 	{
1597  * 		name : 'Image on Left',
1598  * 		element : 'img',
1599  * 		attributes :
1600  * 		{
1601  * 			'style' : 'padding: 5px; margin-right: 5px',
1602  * 			'border' : '2',
1603  * 			'align' : 'left'
1604  * 		}
1605  * 	}
1606  * ]);
1607  */
1608 CKEDITOR.stylesSet = new CKEDITOR.resourceManager( '', 'stylesSet' );
1609 
1610 // Backward compatibility (#5025).
1611 CKEDITOR.addStylesSet = CKEDITOR.tools.bind( CKEDITOR.stylesSet.add, CKEDITOR.stylesSet );
1612 CKEDITOR.loadStylesSet = function( name, url, callback )
1613 	{
1614 		CKEDITOR.stylesSet.addExternal( name, url, '' );
1615 		CKEDITOR.stylesSet.load( name, callback );
1616 	};
1617 
1618 
1619 /**
1620  * Gets the current styleSet for this instance
1621  * @param {Function} callback The function to be called with the styles data.
1622  * @example
1623  * editor.getStylesSet( function( stylesDefinitions ) {} );
1624  */
1625 CKEDITOR.editor.prototype.getStylesSet = function( callback )
1626 {
1627 	if ( !this._.stylesDefinitions )
1628 	{
1629 		var editor = this,
1630 			// Respect the backwards compatible definition entry
1631 			configStyleSet = editor.config.stylesCombo_stylesSet || editor.config.stylesSet || 'default';
1632 
1633 		// #5352 Allow to define the styles directly in the config object
1634 		if ( configStyleSet instanceof Array )
1635 		{
1636 			editor._.stylesDefinitions = configStyleSet;
1637 			callback( configStyleSet );
1638 			return;
1639 		}
1640 
1641 		var	partsStylesSet = configStyleSet.split( ':' ),
1642 			styleSetName = partsStylesSet[ 0 ],
1643 			externalPath = partsStylesSet[ 1 ],
1644 			pluginPath = CKEDITOR.plugins.registered.styles.path;
1645 
1646 		CKEDITOR.stylesSet.addExternal( styleSetName,
1647 				externalPath ?
1648 					partsStylesSet.slice( 1 ).join( ':' ) :
1649 					pluginPath + 'styles/' + styleSetName + '.js', '' );
1650 
1651 		CKEDITOR.stylesSet.load( styleSetName, function( stylesSet )
1652 			{
1653 				editor._.stylesDefinitions = stylesSet[ styleSetName ];
1654 				callback( editor._.stylesDefinitions );
1655 			} ) ;
1656 	}
1657 	else
1658 		callback( this._.stylesDefinitions );
1659 };
1660 
1661 /**
1662  * Indicates that fully selected read-only elements will be included when
1663  * applying the style (for inline styles only).
1664  * @name CKEDITOR.style.includeReadonly
1665  * @type Boolean
1666  * @default false
1667  * @since 3.5
1668  */
1669 
1670  /**
1671   * Disables inline styling on read-only elements.
1672   * @name CKEDITOR.config.disableReadonlyStyling
1673   * @type Boolean
1674   * @default false
1675   * @since 3.5
1676   */
1677 
1678 /**
1679  * The "styles definition set" to use in the editor. They will be used in the
1680  * styles combo and the Style selector of the div container. <br>
1681  * The styles may be defined in the page containing the editor, or can be
1682  * loaded on demand from an external file. In the second case, if this setting
1683  * contains only a name, the styles definition file will be loaded from the
1684  * "styles" folder inside the styles plugin folder.
1685  * Otherwise, this setting has the "name:url" syntax, making it
1686  * possible to set the URL from which loading the styles file.<br>
1687  * Previously this setting was available as config.stylesCombo_stylesSet<br>
1688  * @name CKEDITOR.config.stylesSet
1689  * @type String|Array
1690  * @default 'default'
1691  * @since 3.3
1692  * @example
1693  * // Load from the styles' styles folder (mystyles.js file).
1694  * config.stylesSet = 'mystyles';
1695  * @example
1696  * // Load from a relative URL.
1697  * config.stylesSet = 'mystyles:/editorstyles/styles.js';
1698  * @example
1699  * // Load from a full URL.
1700  * config.stylesSet = 'mystyles:http://www.example.com/editorstyles/styles.js';
1701  * @example
1702  * // Load from a list of definitions.
1703  * config.stylesSet = [
1704  *  { name : 'Strong Emphasis', element : 'strong' },
1705  * { name : 'Emphasis', element : 'em' }, ... ];
1706  */
1707