+ var dtd = CKEDITOR.dtd;\r
+ var tailNbspRegex = /[\t\r\n ]*(?: |\xa0)$/;\r
+\r
+ function indexOfFirstChildElement( element, tagNameList )\r
+ {\r
+ var child,\r
+ children = element.children,\r
+ length = children.length;\r
+\r
+ for ( var i = 0 ; i < length ; i++ )\r
+ {\r
+ child = children[ i ];\r
+ if ( child.name && ( child.name in tagNameList ) )\r
+ return i;\r
+ }\r
+\r
+ return length;\r
+ }\r
+\r
+ function getExtendNestedListFilter( isHtmlFilter )\r
+ {\r
+ // An element filter function that corrects nested list start in an empty\r
+ // list item for better displaying/outputting. (#3165)\r
+ return function( listItem )\r
+ {\r
+ var children = listItem.children,\r
+ firstNestedListIndex = indexOfFirstChildElement( listItem, dtd.$list ),\r
+ firstNestedList = children[ firstNestedListIndex ],\r
+ nodeBefore = firstNestedList && firstNestedList.previous,\r
+ tailNbspmatch;\r
+\r
+ if( nodeBefore\r
+ && ( nodeBefore.name && nodeBefore.name == 'br'\r
+ || nodeBefore.value && ( tailNbspmatch = nodeBefore.value.match( tailNbspRegex ) ) ) )\r
+ {\r
+ var fillerNode = nodeBefore;\r
+\r
+ // Always use 'nbsp' as filler node if we found a nested list appear\r
+ // in front of a list item.\r
+ if ( !( tailNbspmatch && tailNbspmatch.index ) && fillerNode == children[ 0 ] )\r
+ children[ 0 ] = ( isHtmlFilter || CKEDITOR.env.ie ) ?\r
+ new CKEDITOR.htmlParser.text( '\xa0' ) :\r
+ new CKEDITOR.htmlParser.element( 'br', {} );\r
+\r
+ // Otherwise the filler is not needed anymore.\r
+ else if ( fillerNode.name == 'br' )\r
+ children.splice( firstNestedListIndex - 1, 1 );\r
+ else\r
+ fillerNode.value = fillerNode.value.replace( tailNbspRegex, '' );\r
+ }\r
+\r
+ };\r
+ }\r
+\r
+ var defaultListDataFilterRules = { elements : {} };\r
+ for( var i in dtd.$listItem )\r
+ defaultListDataFilterRules.elements[ i ] = getExtendNestedListFilter();\r
+\r
+ var defaultListHtmlFilterRules = { elements : {} };\r
+ for( i in dtd.$listItem )\r
+ defaultListHtmlFilterRules.elements[ i ] = getExtendNestedListFilter( true );\r
+\r