Ticket #5567: 5567_3.patch

_source/plugins/styles/plugin.js

@@ -550 +550 @@
                                         styleRange.insertNode( styleNode );
 
                                         // Let's merge our new style with its neighbors, if possible.
-                                        mergeSiblings( styleNode );
+                                        styleNode.mergeSiblings();
 
                                         // As the style system breaks text nodes constantly, let's normalize
                                         // things for performance.
@@ -624 +624 @@
                                                  * no difference that they're separate entities in the DOM tree. So, merge
                                                  * them before removal.
                                                  */
-                                                mergeSiblings( element );
+                                                element.mergeSiblings();
                                                 removeFromElement( this, element );
 
                                         }
@@ -1057 +1057 @@
                         if ( firstChild )
                         {
                                 // Check the cached nodes for merging.
-                                mergeSiblings( firstChild );
+                                firstChild.type == CKEDITOR.NODE_ELEMENT && firstChild.mergeSiblings();
 
-                                if ( lastChild && !firstChild.equals( lastChild ) )
-                                        mergeSiblings( lastChild );
+                                if ( lastChild && !firstChild.equals( lastChild )
+                                        && lastChild.type == CKEDITOR.NODE_ELEMENT  )
+                                        lastChild.mergeSiblings();
                         }
                 }
         }
 
-        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;

_source/core/dom/element.js

@@ -777 +777 @@
                 },
 
                 /**
+                 * Whether it's an empty inline elements which has no visual impact when removed.
+                 */
+                isEmptyInlineRemoveable : function()
+                {
+                        if ( !CKEDITOR.dtd.$removeEmpty[ this.getName() ] )
+                                return false;
+
+                        var children = this.getChildren();
+                        for ( var i = 0, count = children.count(); i < count; i++ )
+                        {
+                                var child = children.getItem( i );
+
+                                if ( child.type == CKEDITOR.NODE_ELEMENT && child.getAttribute( '_fck_bookmark' ) )
+                                        continue;
+
+                                if ( child.type == CKEDITOR.NODE_ELEMENT && !child.isEmptyInlineRemoveable()
+                                        || child.type == CKEDITOR.NODE_TEXT && CKEDITOR.tools.trim( child.getText() ) )
+                                {
+                                        return false;
+                                }
+                        }
+                        return true;
+                },
+
+                /**
                  * Indicates that the element has defined attributes.
                  * @returns {Boolean} True if the element has attributes.
                  * @example
@@ -874 +899 @@
                         }
                 },
 
+                mergeSiblings : ( function()
+                {
+                        function mergeElements( element, sibling, isNext )
+                        {
+                                if ( sibling && sibling.type == CKEDITOR.NODE_ELEMENT )
+                                {
+                                        // Jumping over bookmark nodes and empty inline elements, e.g. <b><i></i></b>,
+                                        // queuing them to be moved later. (#5567)
+                                        var pendingNodes = [];
+
+                                        while ( sibling.getAttribute( '_fck_bookmark' )
+                                                || sibling.isEmptyInlineRemoveable() )
+                                        {
+                                                pendingNodes.push( sibling );
+                                                sibling = isNext ? sibling.getNext() : sibling.getPrevious();
+                                                if ( !sibling || sibling.type != CKEDITOR.NODE_ELEMENT )
+                                                        return;
+                                        }
+
+                                        if ( 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();
+
+                                                // Move pending nodes first into the target element.
+                                                while( pendingNodes.length )
+                                                        pendingNodes.shift().move( element, !isNext );
+
+                                                sibling.moveChildren( element, !isNext );
+                                                sibling.remove();
+
+                                                // Now check the last inner child (see two comments above).
+                                                if ( innerSibling && innerSibling.type == CKEDITOR.NODE_ELEMENT )
+                                                        innerSibling.mergeSiblings();
+                                        }
+                                }
+                        }
+
+                        return function()
+                        {
+                                // Merge empty links and anchors also. (#5567)
+                                if ( !( CKEDITOR.dtd.$removeEmpty[ this.getName() ] || this.is( 'a' ) ) )
+                                        return;
+
+                                mergeElements( this, this.getNext(), true );
+                                mergeElements( this, this.getPrevious() );
+                        }
+                } )(),
+
                 /**
                  * Shows this element (display it).
                  * @example