Update ckeditor to version 3.2.1

[gopost.git] / ckeditor / _source / plugins / styles / plugin.js

/*
Copyright (c) 2003-2010, CKSource - Frederico Knabben. All rights reserved.
For licensing, see LICENSE.html or http://ckeditor.com/license
*/

CKEDITOR.plugins.add( 'styles',
{
        requires : [ 'selection' ]
});

/**
 * Registers a function to be called whenever a style changes its state in the
 * editing area. The current state is passed to the function. The possible
 * states are {@link CKEDITOR.TRISTATE_ON} and {@link CKEDITOR.TRISTATE_OFF}.
 * @param {CKEDITOR.style} The style to be watched.
 * @param {Function} The function to be called when the style state changes.
 * @example
 * // Create a style object for the <b> element.
 * var style = new CKEDITOR.style( { element : 'b' } );
 * var editor = CKEDITOR.instances.editor1;
 * editor.attachStyleStateChange( style, function( state )
 *     {
 *         if ( state == CKEDITOR.TRISTATE_ON )
 *             alert( 'The current state for the B element is ON' );
 *         else
 *             alert( 'The current state for the B element is OFF' );
 *     });
 */
CKEDITOR.editor.prototype.attachStyleStateChange = function( style, callback )
{
        // Try to get the list of attached callbacks.
        var styleStateChangeCallbacks = this._.styleStateChangeCallbacks;

        // If it doesn't exist, it means this is the first call. So, let's create
        // all the structure to manage the style checks and the callback calls.
        if ( !styleStateChangeCallbacks )
        {
                // Create the callbacks array.
                styleStateChangeCallbacks = this._.styleStateChangeCallbacks = [];

                // Attach to the selectionChange event, so we can check the styles at
                // that point.
                this.on( 'selectionChange', function( ev )
                        {
                                // Loop throw all registered callbacks.
                                for ( var i = 0 ; i < styleStateChangeCallbacks.length ; i++ )
                                {
                                        var callback = styleStateChangeCallbacks[ i ];

                                        // Check the current state for the style defined for that
                                        // callback.
                                        var currentState = callback.style.checkActive( ev.data.path ) ? CKEDITOR.TRISTATE_ON : CKEDITOR.TRISTATE_OFF;

                                        // If the state changed since the last check.
                                        if ( callback.state !== currentState )
                                        {
                                                // Call the callback function, passing the current
                                                // state to it.
                                                callback.fn.call( this, currentState );

                                                // Save the current state, so it can be compared next
                                                // time.
                                                callback.state !== currentState;
                                        }
                                }
                        });
        }

        // Save the callback info, so it can be checked on the next occurence of
        // selectionChange.
        styleStateChangeCallbacks.push( { style : style, fn : callback } );
};

CKEDITOR.STYLE_BLOCK = 1;
CKEDITOR.STYLE_INLINE = 2;
CKEDITOR.STYLE_OBJECT = 3;

(function()
{
        var blockElements       = { address:1,div:1,h1:1,h2:1,h3:1,h4:1,h5:1,h6:1,p:1,pre:1 };
        var 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};

        var semicolonFixRegex = /\s*(?:;\s*|$)/;

        CKEDITOR.style = function( styleDefinition, variablesValues )
        {
                if ( variablesValues )
                {
                        styleDefinition = CKEDITOR.tools.clone( styleDefinition );

                        replaceVariables( styleDefinition.attributes, variablesValues );
                        replaceVariables( styleDefinition.styles, variablesValues );
                }

                var element = this.element = ( styleDefinition.element || '*' ).toLowerCase();

                this.type =
                        ( element == '#' || blockElements[ element ] ) ?
                                CKEDITOR.STYLE_BLOCK
                        : objectElements[ element ] ?
                                CKEDITOR.STYLE_OBJECT
                        :
                                CKEDITOR.STYLE_INLINE;

                this._ =
                {
                        definition : styleDefinition
                };
        };

        CKEDITOR.style.prototype =
        {
                apply : function( document )
                {
                        applyStyle.call( this, document, false );
                },

                remove : function( document )
                {
                        applyStyle.call( this, document, true );
                },

                applyToRange : function( range )
                {
                        return ( this.applyToRange =
                                                this.type == CKEDITOR.STYLE_INLINE ?
                                                        applyInlineStyle
                                                : this.type == CKEDITOR.STYLE_BLOCK ?
                                                        applyBlockStyle
                                                : this.type == CKEDITOR.STYLE_OBJECT ?
                                                        applyObjectStyle
                                                : null ).call( this, range );
                },

                removeFromRange : function( range )
                {
                        return ( this.removeFromRange =
                                                this.type == CKEDITOR.STYLE_INLINE ?
                                                        removeInlineStyle
                                                : null ).call( this, range );
                },

                applyToObject : function( element )
                {
                        setupElement( element, this );
                },

                /**
                 * Get the style state inside an element path. Returns "true" if the
                 * element is active in the path.
                 */
                checkActive : function( elementPath )
                {
                        switch ( this.type )
                        {
                                case CKEDITOR.STYLE_BLOCK :
                                        return this.checkElementRemovable( elementPath.block || elementPath.blockLimit, true );

                                case CKEDITOR.STYLE_OBJECT :
                                case CKEDITOR.STYLE_INLINE :

                                        var elements = elementPath.elements;

                                        for ( var i = 0, element ; i < elements.length ; i++ )
                                        {
                                                element = elements[ i ];

                                                if ( this.type == CKEDITOR.STYLE_INLINE
                                                          && ( element == elementPath.block || element == elementPath.blockLimit ) )
                                                        continue;

                                                if( this.type == CKEDITOR.STYLE_OBJECT
                                                         && !( element.getName() in objectElements ) )
                                                                continue;

                                                if ( this.checkElementRemovable( element, true ) )
                                                        return true;
                                        }
                        }
                        return false;
                },

                checkApplicable : function( elementPath )
                {
                        switch ( this.type )
                        {
                                case CKEDITOR.STYLE_INLINE :
                                case CKEDITOR.STYLE_BLOCK :
                                        break;

                                case CKEDITOR.STYLE_OBJECT :
                                        return elementPath.lastElement.getAscendant( this.element, true );
                        }

                        return true;
                },

                // Checks if an element, or any of its attributes, is removable by the
                // current style definition.
                checkElementRemovable : function( element, fullMatch )
                {
                        if ( !element )
                                return false;

                        var def = this._.definition,
                                attribs;

                        // If the element name is the same as the style name.
                        if ( element.getName() == this.element )
                        {
                                // If no attributes are defined in the element.
                                if ( !fullMatch && !element.hasAttributes() )
                                        return true;

                                attribs = getAttributesForComparison( def );

                                if ( attribs._length )
                                {
                                        for ( var attName in attribs )
                                        {
                                                if ( attName == '_length' )
                                                        continue;

                                                var elementAttr = element.getAttribute( attName ) || '';
                                                if ( attName == 'style' ?
                                                        compareCssText( attribs[ attName ], normalizeCssText( elementAttr, false ) )
                                                        : attribs[ attName ] == elementAttr  )
                                                {
                                                        if ( !fullMatch )
                                                                return true;
                                                }
                                                else if ( fullMatch )
                                                                return false;
                                        }
                                        if ( fullMatch )
                                                return true;
                                }
                                else
                                        return true;
                        }

                        // Check if the element can be somehow overriden.
                        var override = getOverrides( this )[ element.getName() ] ;
                        if ( override )
                        {
                                // If no attributes have been defined, remove the element.
                                if ( !( attribs = override.attributes ) )
                                        return true;

                                for ( var i = 0 ; i < attribs.length ; i++ )
                                {
                                        attName = attribs[i][0];
                                        var actualAttrValue = element.getAttribute( attName );
                                        if ( actualAttrValue )
                                        {
                                                var attValue = attribs[i][1];

                                                // Remove the attribute if:
                                                //    - The override definition value is null;
                                                //    - The override definition value is a string that
                                                //      matches the attribute value exactly.
                                                //    - The override definition value is a regex that
                                                //      has matches in the attribute value.
                                                if ( attValue === null ||
                                                                ( typeof attValue == 'string' && actualAttrValue == attValue ) ||
                                                                attValue.test( actualAttrValue ) )
                                                        return true;
                                        }
                                }
                        }
                        return false;
                },

                // Builds the preview HTML based on the styles definition.
                buildPreview : function()
                {
                        var styleDefinition = this._.definition,
                                html = [],
                                elementName = styleDefinition.element;

                        // Avoid <bdo> in the preview.
                        if ( elementName == 'bdo' )
                                elementName = 'span';

                        html = [ '<', elementName ];

                        // Assign all defined attributes.
                        var attribs     = styleDefinition.attributes;
                        if ( attribs )
                        {
                                for ( var att in attribs )
                                {
                                        html.push( ' ', att, '="', attribs[ att ], '"' );
                                }
                        }

                        // Assign the style attribute.
                        var cssStyle = CKEDITOR.style.getStyleText( styleDefinition );
                        if ( cssStyle )
                                html.push( ' style="', cssStyle, '"' );

                        html.push( '>', styleDefinition.name, '</', elementName, '>' );

                        return html.join( '' );
                }
        };

        // Build the cssText based on the styles definition.
        CKEDITOR.style.getStyleText = function( styleDefinition )
        {
                // If we have already computed it, just return it.
                var stylesDef = styleDefinition._ST;
                if ( stylesDef )
                        return stylesDef;

                stylesDef = styleDefinition.styles;

                // Builds the StyleText.
                var stylesText = ( styleDefinition.attributes && styleDefinition.attributes[ 'style' ] ) || '',
                                specialStylesText = '';

                if ( stylesText.length )
                        stylesText = stylesText.replace( semicolonFixRegex, ';' );

                for ( var style in stylesDef )
                {
                        var styleVal = stylesDef[ style ],
                                        text = ( style + ':' + styleVal ).replace( semicolonFixRegex, ';' );

                        // Some browsers don't support 'inherit' property value, leave them intact. (#5242)
                        if ( styleVal == 'inherit' )
                                specialStylesText += text;
                        else
                                stylesText += text;
                }

                // Browsers make some changes to the style when applying them. So, here
                // we normalize it to the browser format.
                if ( stylesText.length )
                        stylesText = normalizeCssText( stylesText );

                stylesText += specialStylesText;

                // Return it, saving it to the next request.
                return ( styleDefinition._ST = stylesText );
        };

        function applyInlineStyle( range )
        {
                var document = range.document;

                if ( range.collapsed )
                {
                        // Create the element to be inserted in the DOM.
                        var collapsedElement = getElement( this, document );

                        // Insert the empty element into the DOM at the range position.
                        range.insertNode( collapsedElement );

                        // Place the selection right inside the empty element.
                        range.moveToPosition( collapsedElement, CKEDITOR.POSITION_BEFORE_END );

                        return;
                }

                var elementName = this.element;
                var def = this._.definition;
                var isUnknownElement;

                // Get the DTD definition for the element. Defaults to "span".
                var dtd = CKEDITOR.dtd[ elementName ] || ( isUnknownElement = true, CKEDITOR.dtd.span );

                // Bookmark the range so we can re-select it after processing.
                var bookmark = range.createBookmark();

                // Expand the range.
                range.enlarge( CKEDITOR.ENLARGE_ELEMENT );
                range.trim();

                // Get the first node to be processed and the last, which concludes the
                // processing.
                var boundaryNodes = range.getBoundaryNodes();
                var firstNode = boundaryNodes.startNode;
                var lastNode = boundaryNodes.endNode.getNextSourceNode( true );

                // Probably the document end is reached, we need a marker node.
                if ( !lastNode )
                {
                                var marker;
                                lastNode = marker = document.createText( '' );
                                lastNode.insertAfter( range.endContainer );
                }
                // The detection algorithm below skips the contents inside bookmark nodes, so
                // we'll need to make sure lastNode isn't the &nbsp; inside a bookmark node.
                var lastParent = lastNode.getParent();
                if ( lastParent && lastParent.getAttribute( '_fck_bookmark' ) )
                        lastNode = lastParent;

                if ( lastNode.equals( firstNode ) )
                {
                        // If the last node is the same as the the first one, we must move
                        // it to the next one, otherwise the first one will not be
                        // processed.
                        lastNode = lastNode.getNextSourceNode( true );

                        // It may happen that there are no more nodes after it (the end of
                        // the document), so we must add something there to make our code
                        // simpler.
                        if ( !lastNode )
                        {
                                lastNode = marker = document.createText( '' );
                                lastNode.insertAfter( firstNode );
                        }
                }

                var currentNode = firstNode;

                var styleRange;

                while ( currentNode )
                {
                        var applyStyle = false;

                        if ( currentNode.equals( lastNode ) )
                        {
                                currentNode = null;
                                applyStyle = true;
                        }
                        else
                        {
                                var nodeType = currentNode.type;
                                var nodeName = nodeType == CKEDITOR.NODE_ELEMENT ? currentNode.getName() : null;

                                if ( nodeName && currentNode.getAttribute( '_fck_bookmark' ) )
                                {
                                        currentNode = currentNode.getNextSourceNode( true );
                                        continue;
                                }

                                // Check if the current node can be a child of the style element.
                                if ( !nodeName || ( dtd[ nodeName ]
                                        && ( currentNode.getPosition( lastNode ) | CKEDITOR.POSITION_PRECEDING | CKEDITOR.POSITION_IDENTICAL | CKEDITOR.POSITION_IS_CONTAINED ) == ( CKEDITOR.POSITION_PRECEDING + CKEDITOR.POSITION_IDENTICAL + CKEDITOR.POSITION_IS_CONTAINED )
                                        && ( !def.childRule || def.childRule( currentNode ) ) ) )
                                {
                                        var currentParent = currentNode.getParent();

                                        // Check if the style element can be a child of the current
                                        // node parent or if the element is not defined in the DTD.
                                        if ( currentParent
                                                && ( ( currentParent.getDtd() || CKEDITOR.dtd.span )[ elementName ] || isUnknownElement )
                                                && ( !def.parentRule || def.parentRule( currentParent ) ) )
                                        {
                                                // This node will be part of our range, so if it has not
                                                // been started, place its start right before the node.
                                                // In the case of an element node, it will be included
                                                // only if it is entirely inside the range.
                                                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 ) ) )
                                                {
                                                        styleRange = new CKEDITOR.dom.range( document );
                                                        styleRange.setStartBefore( currentNode );
                                                }

                                                // Non element nodes, or empty elements can be added
                                                // completely to the range.
                                                if ( nodeType == CKEDITOR.NODE_TEXT || ( nodeType == CKEDITOR.NODE_ELEMENT && !currentNode.getChildCount() ) )
                                                {
                                                        var includedNode = currentNode;
                                                        var parentNode;

                                                        // This node is about to be included completelly, but,
                                                        // if this is the last node in its parent, we must also
                                                        // check if the parent itself can be added completelly
                                                        // to the range.
                                                        while ( !includedNode.$.nextSibling
                                                                && ( parentNode = includedNode.getParent(), dtd[ parentNode.getName() ] )
                                                                && ( parentNode.getPosition( firstNode ) | CKEDITOR.POSITION_FOLLOWING | CKEDITOR.POSITION_IDENTICAL | CKEDITOR.POSITION_IS_CONTAINED ) == ( CKEDITOR.POSITION_FOLLOWING + CKEDITOR.POSITION_IDENTICAL + CKEDITOR.POSITION_IS_CONTAINED )
                                                                && ( !def.childRule || def.childRule( parentNode ) ) )
                                                        {
                                                                includedNode = parentNode;
                                                        }

                                                        styleRange.setEndAfter( includedNode );

                                                        // If the included node still is the last node in its
                                                        // parent, it means that the parent can't be included
                                                        // in this style DTD, so apply the style immediately.
                                                        if ( !includedNode.$.nextSibling )
                                                                applyStyle = true;

                                                }
                                        }
                                        else
                                                applyStyle = true;
                                }
                                else
                                        applyStyle = true;

                                // Get the next node to be processed.
                                currentNode = currentNode.getNextSourceNode();
                        }

                        // Apply the style if we have something to which apply it.
                        if ( applyStyle && styleRange && !styleRange.collapsed )
                        {
                                // Build the style element, based on the style object definition.
                                var styleNode = getElement( this, document );

                                // Get the element that holds the entire range.
                                var parent = styleRange.getCommonAncestor();

                                // Loop through the parents, removing the redundant attributes
                                // from the element to be applied.
                                while ( styleNode && parent )
                                {
                                        if ( parent.getName() == elementName )
                                        {
                                                for ( var attName in def.attributes )
                                                {
                                                        if ( styleNode.getAttribute( attName ) == parent.getAttribute( attName ) )
                                                                styleNode.removeAttribute( attName );
                                                }

                                                for ( var styleName in def.styles )
                                                {
                                                        if ( styleNode.getStyle( styleName ) == parent.getStyle( styleName ) )
                                                                styleNode.removeStyle( styleName );
                                                }

                                                if ( !styleNode.hasAttributes() )
                                                {
                                                        styleNode = null;
                                                        break;
                                                }
                                        }

                                        parent = parent.getParent();
                                }

                                if ( styleNode )
                                {
                                        // Move the contents of the range to the style element.
                                        styleRange.extractContents().appendTo( styleNode );

                                        // Here we do some cleanup, removing all duplicated
                                        // elements from the style element.
                                        removeFromInsideElement( this, styleNode );

                                        // Insert it into the range position (it is collapsed after
                                        // extractContents.
                                        styleRange.insertNode( styleNode );

                                        // Let's merge our new style with its neighbors, if possible.
                                        mergeSiblings( styleNode );

                                        // As the style system breaks text nodes constantly, let's normalize
                                        // things for performance.
                                        // With IE, some paragraphs get broken when calling normalize()
                                        // repeatedly. Also, for IE, we must normalize body, not documentElement.
                                        // IE is also known for having a "crash effect" with normalize().
                                        // We should try to normalize with IE too in some way, somewhere.
                                        if ( !CKEDITOR.env.ie )
                                                styleNode.$.normalize();
                                }

                                // Style applied, let's release the range, so it gets
                                // re-initialization in the next loop.
                                styleRange = null;
                        }
                }

                // Remove the temporary marking node.(#4111)
                marker && marker.remove();
                range.moveToBookmark( bookmark );
                // Minimize the result range to exclude empty text nodes. (#5374)
                range.shrink( CKEDITOR.SHRINK_TEXT );
        }

        function removeInlineStyle( range )
        {
                /*
                 * Make sure our range has included all "collpased" parent inline nodes so
                 * that our operation logic can be simpler.
                 */
                range.enlarge( CKEDITOR.ENLARGE_ELEMENT );

                var bookmark = range.createBookmark(),
                        startNode = bookmark.startNode;

                if ( range.collapsed )
                {

                        var startPath = new CKEDITOR.dom.elementPath( startNode.getParent() ),
                                // The topmost element in elementspatch which we should jump out of.
                                boundaryElement;


                        for ( var i = 0, element ; i < startPath.elements.length
                                        && ( element = startPath.elements[i] ) ; i++ )
                        {
                                /*
                                 * 1. If it's collaped inside text nodes, try to remove the style from the whole element.
                                 *
                                 * 2. Otherwise if it's collapsed on element boundaries, moving the selection
                                 *  outside the styles instead of removing the whole tag,
                                 *  also make sure other inner styles were well preserverd.(#3309)
                                 */
                                if ( element == startPath.block || element == startPath.blockLimit )
                                        break;

                                if ( this.checkElementRemovable( element ) )
                                {
                                        var endOfElement = range.checkBoundaryOfElement( element, CKEDITOR.END ),
                                                        startOfElement = !endOfElement && range.checkBoundaryOfElement( element, CKEDITOR.START );
                                        if ( startOfElement || endOfElement )
                                        {
                                                boundaryElement = element;
                                                boundaryElement.match = startOfElement ? 'start' : 'end';
                                        }
                                        else
                                        {
                                                /*
                                                 * Before removing the style node, there may be a sibling to the style node
                                                 * that's exactly the same to the one to be removed. To the user, it makes
                                                 * no difference that they're separate entities in the DOM tree. So, merge
                                                 * them before removal.
                                                 */
                                                mergeSiblings( element );
                                                removeFromElement( this, element );

                                        }
                                }
                        }

                        // Re-create the style tree after/before the boundary element,
                        // the replication start from bookmark start node to define the
                        // new range.
                        if ( boundaryElement )
                        {
                                var clonedElement = startNode;
                                for ( i = 0 ;; i++ )
                                {
                                        var newElement = startPath.elements[ i ];
                                        if ( newElement.equals( boundaryElement ) )
                                                break;
                                        // Avoid copying any matched element.
                                        else if ( newElement.match )
                                                continue;
                                        else
                                                newElement = newElement.clone();
                                        newElement.append( clonedElement );
                                        clonedElement = newElement;
                                }
                                clonedElement[ boundaryElement.match == 'start' ?
                                                        'insertBefore' : 'insertAfter' ]( boundaryElement );
                        }
                }
                else
                {
                        /*
                         * Now our range isn't collapsed. Lets walk from the start node to the end
                         * node via DFS and remove the styles one-by-one.
                         */
                        var endNode = bookmark.endNode,
                                me = this;

                        /*
                         * Find out the style ancestor that needs to be broken down at startNode
                         * and endNode.
                         */
                        function breakNodes()
                        {
                                var startPath = new CKEDITOR.dom.elementPath( startNode.getParent() ),
                                        endPath = new CKEDITOR.dom.elementPath( endNode.getParent() ),
                                        breakStart = null,
                                        breakEnd = null;
                                for ( var i = 0 ; i < startPath.elements.length ; i++ )
                                {
                                        var element = startPath.elements[ i ];

                                        if ( element == startPath.block || element == startPath.blockLimit )
                                                break;

                                        if ( me.checkElementRemovable( element ) )
                                                breakStart = element;
                                }
                                for ( i = 0 ; i < endPath.elements.length ; i++ )
                                {
                                        element = endPath.elements[ i ];

                                        if ( element == endPath.block || element == endPath.blockLimit )
                                                break;

                                        if ( me.checkElementRemovable( element ) )
                                                breakEnd = element;
                                }

                                if ( breakEnd )
                                        endNode.breakParent( breakEnd );
                                if ( breakStart )
                                        startNode.breakParent( breakStart );
                        }
                        breakNodes();

                        // Now, do the DFS walk.
                        var currentNode = startNode.getNext();
                        while ( !currentNode.equals( endNode ) )
                        {
                                /*
                                 * Need to get the next node first because removeFromElement() can remove
                                 * the current node from DOM tree.
                                 */
                                var nextNode = currentNode.getNextSourceNode();
                                if ( currentNode.type == CKEDITOR.NODE_ELEMENT && this.checkElementRemovable( currentNode ) )
                                {
                                        // Remove style from element or overriding element.
                                        if ( currentNode.getName() == this.element )
                                                removeFromElement( this, currentNode );
                                        else
                                                removeOverrides( currentNode, getOverrides( this )[ currentNode.getName() ] );

                                        /*
                                         * removeFromElement() may have merged the next node with something before
                                         * the startNode via mergeSiblings(). In that case, the nextNode would
                                         * contain startNode and we'll have to call breakNodes() again and also
                                         * reassign the nextNode to something after startNode.
                                         */
                                        if ( nextNode.type == CKEDITOR.NODE_ELEMENT && nextNode.contains( startNode ) )
                                        {
                                                breakNodes();
                                                nextNode = startNode.getNext();
                                        }
                                }
                                currentNode = nextNode;
                        }
                }

                range.moveToBookmark( bookmark );
}

        function applyObjectStyle( range )
        {
                var root = range.getCommonAncestor( true, true ),
                                element = root.getAscendant( this.element, true );
                element && setupElement( element, this );
        }

        function applyBlockStyle( range )
        {
                // Serializible bookmarks is needed here since
                // elements may be merged.
                var bookmark = range.createBookmark( true );

                var iterator = range.createIterator();
                iterator.enforceRealBlocks = true;

                var block;
                var doc = range.document;
                var previousPreBlock;

                while ( ( block = iterator.getNextParagraph() ) )               // Only one =
                {
                        var newBlock = getElement( this, doc );
                        replaceBlock( block, newBlock );
                }

                range.moveToBookmark( bookmark );
        }

        // Replace the original block with new one, with special treatment
        // for <pre> blocks to make sure content format is well preserved, and merging/splitting adjacent
        // when necessary.(#3188)
        function replaceBlock( block, newBlock )
        {
                var newBlockIsPre       = newBlock.is( 'pre' );
                var blockIsPre          = block.is( 'pre' );

                var isToPre     = newBlockIsPre && !blockIsPre;
                var isFromPre   = !newBlockIsPre && blockIsPre;

                if ( isToPre )
                        newBlock = toPre( block, newBlock );
                else if ( isFromPre )
                        // Split big <pre> into pieces before start to convert.
                        newBlock = fromPres( splitIntoPres( block ), newBlock );
                else
                        block.moveChildren( newBlock );

                newBlock.replace( block );

                if ( newBlockIsPre )
                {
                        // Merge previous <pre> blocks.
                        mergePre( newBlock );
                }
        }

        /**
         * Merge a <pre> block with a previous sibling if available.
         */
        function mergePre( preBlock )
        {
                var previousBlock;
                if ( !( ( previousBlock = preBlock.getPreviousSourceNode( true, CKEDITOR.NODE_ELEMENT ) )
                                 && previousBlock.is
                                 && previousBlock.is( 'pre') ) )
                        return;

                // Merge the previous <pre> block contents into the current <pre>
                // block.
                //
                // Another thing to be careful here is that currentBlock might contain
                // a '\n' at the beginning, and previousBlock might contain a '\n'
                // towards the end. These new lines are not normally displayed but they
                // become visible after merging.
                var mergedHtml = replace( previousBlock.getHtml(), /\n$/, '' ) + '\n\n' +
                                replace( preBlock.getHtml(), /^\n/, '' ) ;

                // Krugle: IE normalizes innerHTML from <pre>, breaking whitespaces.
                if ( CKEDITOR.env.ie )
                        preBlock.$.outerHTML = '<pre>' + mergedHtml + '</pre>';
                else
                        preBlock.setHtml( mergedHtml );

                previousBlock.remove();
        }

        /**
         * Split into multiple <pre> blocks separated by double line-break.
         * @param preBlock
         */
        function splitIntoPres( preBlock )
        {
                // Exclude the ones at header OR at tail,
                // and ignore bookmark content between them.
                var duoBrRegex = /(\S\s*)\n(?:\s|(<span[^>]+_fck_bookmark.*?\/span>))*\n(?!$)/gi,
                        blockName = preBlock.getName(),
                        splitedHtml = replace( preBlock.getOuterHtml(),
                                duoBrRegex,
                                function( match, charBefore, bookmark )
                                {
                                  return charBefore + '</pre>' + bookmark + '<pre>';
                                } );

                var pres = [];
                splitedHtml.replace( /<pre\b.*?>([\s\S]*?)<\/pre>/gi, function( match, preContent ){
                        pres.push( preContent );
                } );
                return pres;
        }

        // Wrapper function of String::replace without considering of head/tail bookmarks nodes.
        function replace( str, regexp, replacement )
        {
                var headBookmark = '',
                        tailBookmark = '';

                str = str.replace( /(^<span[^>]+_fck_bookmark.*?\/span>)|(<span[^>]+_fck_bookmark.*?\/span>$)/gi,
                        function( str, m1, m2 ){
                                        m1 && ( headBookmark = m1 );
                                        m2 && ( tailBookmark = m2 );
                                return '';
                        } );
                return headBookmark + str.replace( regexp, replacement ) + tailBookmark;
        }
        /**
         * Converting a list of <pre> into blocks with format well preserved.
         */
        function fromPres( preHtmls, newBlock )
        {
                var docFrag = new CKEDITOR.dom.documentFragment( newBlock.getDocument() );
                for ( var i = 0 ; i < preHtmls.length ; i++ )
                {
                        var blockHtml = preHtmls[ i ];

                        // 1. Trim the first and last line-breaks immediately after and before <pre>,
                        // they're not visible.
                         blockHtml =  blockHtml.replace( /(\r\n|\r)/g, '\n' ) ;
                         blockHtml = replace(  blockHtml, /^[ \t]*\n/, '' ) ;
                         blockHtml = replace(  blockHtml, /\n$/, '' ) ;
                        // 2. Convert spaces or tabs at the beginning or at the end to &nbsp;
                         blockHtml = replace(  blockHtml, /^[ \t]+|[ \t]+$/g, function( match, offset, s )
                                        {
                                                if ( match.length == 1 )        // one space, preserve it
                                                        return '&nbsp;' ;
                                                else if ( !offset )             // beginning of block
                                                        return CKEDITOR.tools.repeat( '&nbsp;', match.length - 1 ) + ' ';
                                                else                            // end of block
                                                        return ' ' + CKEDITOR.tools.repeat( '&nbsp;', match.length - 1 );
                                        } ) ;

                        // 3. Convert \n to <BR>.
                        // 4. Convert contiguous (i.e. non-singular) spaces or tabs to &nbsp;
                         blockHtml =  blockHtml.replace( /\n/g, '<br>' ) ;
                         blockHtml =  blockHtml.replace( /[ \t]{2,}/g,
                                        function ( match )
                                        {
                                                return CKEDITOR.tools.repeat( '&nbsp;', match.length - 1 ) + ' ' ;
                                        } ) ;

                        var newBlockClone = newBlock.clone();
                        newBlockClone.setHtml(  blockHtml );
                        docFrag.append( newBlockClone );
                }
                return docFrag;
        }

        /**
         * Converting from a non-PRE block to a PRE block in formatting operations.
         */
        function toPre( block, newBlock )
        {
                // First trim the block content.
                var preHtml = block.getHtml();

                // 1. Trim head/tail spaces, they're not visible.
                preHtml = replace( preHtml, /(?:^[ \t\n\r]+)|(?:[ \t\n\r]+$)/g, '' );
                // 2. Delete ANSI whitespaces immediately before and after <BR> because
                //    they are not visible.
                preHtml = preHtml.replace( /[ \t\r\n]*(<br[^>]*>)[ \t\r\n]*/gi, '$1' );
                // 3. Compress other ANSI whitespaces since they're only visible as one
                //    single space previously.
                // 4. Convert &nbsp; to spaces since &nbsp; is no longer needed in <PRE>.
                preHtml = preHtml.replace( /([ \t\n\r]+|&nbsp;)/g, ' ' );
                // 5. Convert any <BR /> to \n. This must not be done earlier because
                //    the \n would then get compressed.
                preHtml = preHtml.replace( /<br\b[^>]*>/gi, '\n' );

                // Krugle: IE normalizes innerHTML to <pre>, breaking whitespaces.
                if ( CKEDITOR.env.ie )
                {
                        var temp = block.getDocument().createElement( 'div' );
                        temp.append( newBlock );
                        newBlock.$.outerHTML =  '<pre>' + preHtml + '</pre>';
                        newBlock = temp.getFirst().remove();
                }
                else
                        newBlock.setHtml( preHtml );

                return newBlock;
        }

        // Removes a style from an element itself, don't care about its subtree.
        function removeFromElement( style, element )
        {
                var def = style._.definition,
                        attributes = CKEDITOR.tools.extend( {}, def.attributes, getOverrides( style )[ element.getName() ] ),
                        styles = def.styles,
                        // If the style is only about the element itself, we have to remove the element.
                        removeEmpty = CKEDITOR.tools.isEmpty( attributes ) && CKEDITOR.tools.isEmpty( styles );

                // Remove definition attributes/style from the elemnt.
                for ( var attName in attributes )
                {
                        // The 'class' element value must match (#1318).
                        if ( ( attName == 'class' || style._.definition.fullMatch )
                                && element.getAttribute( attName ) != normalizeProperty( attName, attributes[ attName ] ) )
                                continue;
                        removeEmpty = element.hasAttribute( attName );
                        element.removeAttribute( attName );
                }

                for ( var styleName in styles )
                {
                        // Full match style insist on having fully equivalence. (#5018)
                        if ( style._.definition.fullMatch
                                && element.getStyle( styleName ) != normalizeProperty( styleName, styles[ styleName ], true ) )
                                continue;

                        removeEmpty = removeEmpty || !!element.getStyle( styleName );
                        element.removeStyle( styleName );
                }

                removeEmpty && removeNoAttribsElement( element );
        }

        // Removes a style from inside an element.
        function removeFromInsideElement( style, element )
        {
                var def = style._.definition,
                        attribs = def.attributes,
                        styles = def.styles,
                        overrides = getOverrides( style );

                var innerElements = element.getElementsByTag( style.element );

                for ( var i = innerElements.count(); --i >= 0 ; )
                        removeFromElement( style,  innerElements.getItem( i ) );

                // Now remove any other element with different name that is
                // defined to be overriden.
                for ( var overrideElement in overrides )
                {
                        if ( overrideElement != style.element )
                        {
                                innerElements = element.getElementsByTag( overrideElement ) ;
                                for ( i = innerElements.count() - 1 ; i >= 0 ; i-- )
                                {
                                        var innerElement = innerElements.getItem( i );
                                        removeOverrides( innerElement, overrides[ overrideElement ] ) ;
                                }
                        }
                }

        }

        /**
         *  Remove overriding styles/attributes from the specific element.
         *  Note: Remove the element if no attributes remain.
         * @param {Object} element
         * @param {Object} overrides
         */
        function removeOverrides( element, overrides )
        {
                var attributes = overrides && overrides.attributes ;

                if ( attributes )
                {
                        for ( var i = 0 ; i < attributes.length ; i++ )
                        {
                                var attName = attributes[i][0], actualAttrValue ;

                                if ( ( actualAttrValue = element.getAttribute( attName ) ) )
                                {
                                        var attValue = attributes[i][1] ;

                                        // Remove the attribute if:
                                        //    - The override definition value is null ;
                                        //    - The override definition valie is a string that
                                        //      matches the attribute value exactly.
                                        //    - The override definition value is a regex that
                                        //      has matches in the attribute value.
                                        if ( attValue === null ||
                                                        ( attValue.test && attValue.test( actualAttrValue ) ) ||
                                                        ( typeof attValue == 'string' && actualAttrValue == attValue ) )
                                                element.removeAttribute( attName ) ;
                                }
                        }
                }

                removeNoAttribsElement( element );
        }

        // If the element has no more attributes, remove it.
        function removeNoAttribsElement( element )
        {
                // If no more attributes remained in the element, remove it,
                // leaving its children.
                if ( !element.hasAttributes() )
                {
                        // Removing elements may open points where merging is possible,
                        // so let's cache the first and last nodes for later checking.
                        var firstChild  = element.getFirst();
                        var lastChild   = element.getLast();

                        element.remove( true );

                        if ( firstChild )
                        {
                                // Check the cached nodes for merging.
                                mergeSiblings( firstChild );

                                if ( lastChild && !firstChild.equals( lastChild ) )
                                        mergeSiblings( lastChild );
                        }
                }
        }

        function mergeSiblings( element )
        {
                if ( !element || element.type != CKEDITOR.NODE_ELEMENT || !CKEDITOR.dtd.$removeEmpty[ element.getName() ] )
                        return;

                mergeElements( element, element.getNext(), true );
                mergeElements( element, element.getPrevious() );
        }

        function mergeElements( element, sibling, isNext )
        {
                if ( sibling && sibling.type == CKEDITOR.NODE_ELEMENT )
                {
                        var hasBookmark = sibling.getAttribute( '_fck_bookmark' );

                        if ( hasBookmark )
                                sibling = isNext ? sibling.getNext() : sibling.getPrevious();

                        if ( sibling && sibling.type == CKEDITOR.NODE_ELEMENT && element.isIdentical( sibling ) )
                        {
                                // Save the last child to be checked too, to merge things like
                                // <b><i></i></b><b><i></i></b> => <b><i></i></b>
                                var innerSibling = isNext ? element.getLast() : element.getFirst();

                                if ( hasBookmark )
                                        ( isNext ? sibling.getPrevious() : sibling.getNext() ).move( element, !isNext );

                                sibling.moveChildren( element, !isNext );
                                sibling.remove();

                                // Now check the last inner child (see two comments above).
                                if ( innerSibling )
                                        mergeSiblings( innerSibling );
                        }
                }
        }

        function getElement( style, targetDocument )
        {
                var el;

                var def = style._.definition;

                var elementName = style.element;

                // The "*" element name will always be a span for this function.
                if ( elementName == '*' )
                        elementName = 'span';

                // Create the element.
                el = new CKEDITOR.dom.element( elementName, targetDocument );

                return setupElement( el, style );
        }

        function setupElement( el, style )
        {
                var def = style._.definition;
                var attributes = def.attributes;
                var styles = CKEDITOR.style.getStyleText( def );

                // Assign all defined attributes.
                if ( attributes )
                {
                        for ( var att in attributes )
                        {
                                el.setAttribute( att, attributes[ att ] );
                        }
                }

                // Assign all defined styles.
                if ( styles )
                        el.setAttribute( 'style', styles );

                return el;
        }

        var varRegex = /#\((.+?)\)/g;
        function replaceVariables( list, variablesValues )
        {
                for ( var item in list )
                {
                        list[ item ] = list[ item ].replace( varRegex, function( match, varName )
                                {
                                        return variablesValues[ varName ];
                                });
                }
        }


        // Returns an object that can be used for style matching comparison.
        // Attributes names and values are all lowercased, and the styles get
        // merged with the style attribute.
        function getAttributesForComparison( styleDefinition )
        {
                // If we have already computed it, just return it.
                var attribs = styleDefinition._AC;
                if ( attribs )
                        return attribs;

                attribs = {};

                var length = 0;

                // Loop through all defined attributes.
                var styleAttribs = styleDefinition.attributes;
                if ( styleAttribs )
                {
                        for ( var styleAtt in styleAttribs )
                        {
                                length++;
                                attribs[ styleAtt ] = styleAttribs[ styleAtt ];
                        }
                }

                // Includes the style definitions.
                var styleText = CKEDITOR.style.getStyleText( styleDefinition );
                if ( styleText )
                {
                        if ( !attribs[ 'style' ] )
                                length++;
                        attribs[ 'style' ] = styleText;
                }

                // Appends the "length" information to the object.
                attribs._length = length;

                // Return it, saving it to the next request.
                return ( styleDefinition._AC = attribs );
        }

        /**
         * Get the the collection used to compare the elements and attributes,
         * defined in this style overrides, with other element. All information in
         * it is lowercased.
         * @param {CKEDITOR.style} style
         */
        function getOverrides( style )
        {
                if ( style._.overrides )
                        return style._.overrides;

                var overrides = ( style._.overrides = {} ),
                        definition = style._.definition.overrides;

                if ( definition )
                {
                        // The override description can be a string, object or array.
                        // Internally, well handle arrays only, so transform it if needed.
                        if ( !CKEDITOR.tools.isArray( definition ) )
                                definition = [ definition ];

                        // Loop through all override definitions.
                        for ( var i = 0 ; i < definition.length ; i++ )
                        {
                                var override = definition[i];
                                var elementName;
                                var overrideEl;
                                var attrs;

                                // If can be a string with the element name.
                                if ( typeof override == 'string' )
                                        elementName = override.toLowerCase();
                                // Or an object.
                                else
                                {
                                        elementName = override.element ? override.element.toLowerCase() : style.element;
                                        attrs = override.attributes;
                                }

                                // We can have more than one override definition for the same
                                // element name, so we attempt to simply append information to
                                // it if it already exists.
                                overrideEl = overrides[ elementName ] || ( overrides[ elementName ] = {} );

                                if ( attrs )
                                {
                                        // The returning attributes list is an array, because we
                                        // could have different override definitions for the same
                                        // attribute name.
                                        var overrideAttrs = ( overrideEl.attributes = overrideEl.attributes || new Array() );
                                        for ( var attName in attrs )
                                        {
                                                // Each item in the attributes array is also an array,
                                                // where [0] is the attribute name and [1] is the
                                                // override value.
                                                overrideAttrs.push( [ attName.toLowerCase(), attrs[ attName ] ] );
                                        }
                                }
                        }
                }

                return overrides;
        }

        function normalizeProperty( name, value, isStyle )
        {
                var temp = new CKEDITOR.dom.element( 'span' );
                temp [ isStyle ? 'setStyle' : 'setAttribute' ]( name, value );
                return temp[ isStyle ? 'getStyle' : 'getAttribute' ]( name );
        }

        function normalizeCssText( unparsedCssText, nativeNormalize )
        {
                var styleText;
                if ( nativeNormalize !== false )
                {
                        // Injects the style in a temporary span object, so the browser parses it,
                        // retrieving its final format.
                        var temp = new CKEDITOR.dom.element( 'span' );
                        temp.setAttribute( 'style', unparsedCssText );
                        styleText = temp.getAttribute( 'style' ) || '';
                }
                else
                        styleText = unparsedCssText;

                // Shrinking white-spaces around colon and semi-colon (#4147).
                // Compensate tail semi-colon.
                return styleText.replace( /\s*([;:])\s*/, '$1' )
                                                         .replace( /([^\s;])$/, '$1;')
                                                         .replace( /,\s+/g, ',' ) // Trimming spaces after comma (e.g. font-family name)(#4107).
                                                         .toLowerCase();
        }

        // Turn inline style text properties into one hash.
        function parseStyleText( styleText )
        {
                var retval = {};
                styleText
                   .replace( /&quot;/g, '"' )
                   .replace( /\s*([^ :;]+)\s*:\s*([^;]+)\s*(?=;|$)/g, function( match, name, value )
                {
                        retval[ name ] = value;
                } );
                return retval;
        }

        function compareCssText( source, target )
        {
                typeof source == 'string' && ( source = parseStyleText( source ) );
                typeof target == 'string' && ( target = parseStyleText( target ) );
                for( var name in source )
                {
                        // Value 'inherit'  is treated as a wildcard,
                        // which will match any value.
                        if ( !( name in target &&
                                        ( target[ name ] == source[ name ]
                                                || source[ name ] == 'inherit'
                                                || target[ name ] == 'inherit' ) ) )
                        {
                                return false;
                        }
                }
                return true;
        }

        function applyStyle( document, remove )
        {
                // Get all ranges from the selection.
                var selection = document.getSelection();
                var ranges = selection.getRanges();
                var func = remove ? this.removeFromRange : this.applyToRange;

                // Apply the style to the ranges.
                for ( var i = 0 ; i < ranges.length ; i++ )
                        func.call( this, ranges[ i ] );

                // Select the ranges again.
                selection.selectRanges( ranges );
        }
})();

CKEDITOR.styleCommand = function( style )
{
        this.style = style;
};

CKEDITOR.styleCommand.prototype.exec = function( editor )
{
        editor.focus();

        var doc = editor.document;

        if ( doc )
        {
                if ( this.state == CKEDITOR.TRISTATE_OFF )
                        this.style.apply( doc );
                else if ( this.state == CKEDITOR.TRISTATE_ON )
                        this.style.remove( doc );
        }

        return !!doc;
};

CKEDITOR.stylesSet = new CKEDITOR.resourceManager( '', 'stylesSet' );

// Backward compatibility (#5025).
CKEDITOR.addStylesSet = CKEDITOR.tools.bind( CKEDITOR.stylesSet.add, CKEDITOR.stylesSet );
CKEDITOR.loadStylesSet = function( name, url, callback )
        {
                CKEDITOR.stylesSet.addExternal( name, url, '' );
                CKEDITOR.stylesSet.load( name, callback );
        };


/**
 * Gets the current styleSet for this instance
 * @param {Function} The function to be called with the styles data.
 * @example
 * editor.getStylesSet( function( stylesDefinitions ) {} );
 */
CKEDITOR.editor.prototype.getStylesSet = function( callback )
{
        if ( !this._.stylesDefinitions )
        {
                var editor = this,
                        // Respect the backwards compatible definition entry
                        configStyleSet = editor.config.stylesCombo_stylesSet || editor.config.stylesSet || 'default';

                // #5352 Allow to define the styles directly in the config object
                if ( configStyleSet instanceof Array )
                {
                        editor._.stylesDefinitions = configStyleSet;
                        callback( configStyleSet );
                        return;
                }

                var     partsStylesSet = configStyleSet.split( ':' ),
                        styleSetName = partsStylesSet[ 0 ],
                        externalPath = partsStylesSet[ 1 ],
                        pluginPath = CKEDITOR.plugins.registered.styles.path;

                CKEDITOR.stylesSet.addExternal( styleSetName,
                                externalPath ?
                                        partsStylesSet.slice( 1 ).join( ':' ) :
                                        pluginPath + 'styles/' + styleSetName + '.js', '' );

                CKEDITOR.stylesSet.load( styleSetName, function( stylesSet )
                        {
                                editor._.stylesDefinitions = stylesSet[ styleSetName ];
                                callback( editor._.stylesDefinitions );
                        } ) ;
        }
        else
                callback( this._.stylesDefinitions );
};

/**
 * The "styles definition set" to use in the editor. They will be used in the
 * styles combo and the Style selector of the div container. <br>
 * The styles may be defined in the page containing the editor, or can be
 * loaded on demand from an external file. In the second case, if this setting
 * contains only a name, the styles definition file will be loaded from the
 * "styles" folder inside the styles plugin folder.
 * Otherwise, this setting has the "name:url" syntax, making it
 * possible to set the URL from which loading the styles file.<br>
 * Previously this setting was available as config.stylesCombo_stylesSet<br>
 * @type String|Array
 * @default 'default'
 * @since 3.3
 * @example
 * // Load from the styles' styles folder (mystyles.js file).
 * config.stylesSet = 'mystyles';
 * @example
 * // Load from a relative URL.
 * config.stylesSet = 'mystyles:/editorstyles/styles.js';
 * @example
 * // Load from a full URL.
 * config.stylesSet = 'mystyles:http://www.example.com/editorstyles/styles.js';
 * @example
 * // Load from a list of definitions.
 * config.stylesSet = [
 *  { name : 'Strong Emphasis', element : 'strong' },
 * { name : 'Emphasis', element : 'em' }, ... ];
 */