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[ckeditor.git] / skins / ckeditor / _source / plugins / htmldataprocessor / plugin.js
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+/*\r
+Copyright (c) 2003-2011, CKSource - Frederico Knabben. All rights reserved.\r
+For licensing, see LICENSE.html or http://ckeditor.com/license\r
+*/\r
+\r
+(function()\r
+{\r
+       // Regex to scan for   at the end of blocks, which are actually placeholders.\r
+       // Safari transforms the   to \xa0. (#4172)\r
+       var tailNbspRegex = /^[\t\r\n ]*(?: |\xa0)$/;\r
+\r
+       var protectedSourceMarker = '{cke_protected}';\r
+\r
+       // Return the last non-space child node of the block (#4344).\r
+       function lastNoneSpaceChild( block )\r
+       {\r
+               var lastIndex = block.children.length,\r
+                       last = block.children[ lastIndex - 1 ];\r
+               while (  last && last.type == CKEDITOR.NODE_TEXT && !CKEDITOR.tools.trim( last.value ) )\r
+                       last = block.children[ --lastIndex ];\r
+               return last;\r
+       }\r
+\r
+       function trimFillers( block, fromSource )\r
+       {\r
+               // If the current node is a block, and if we're converting from source or\r
+               // we're not in IE then search for and remove any tailing BR node.\r
+               //\r
+               // Also, any   at the end of blocks are fillers, remove them as well.\r
+               // (#2886)\r
+               var children = block.children, lastChild = lastNoneSpaceChild( block );\r
+               if ( lastChild )\r
+               {\r
+                       if ( ( fromSource || !CKEDITOR.env.ie ) && lastChild.type == CKEDITOR.NODE_ELEMENT && lastChild.name == 'br' )\r
+                               children.pop();\r
+                       if ( lastChild.type == CKEDITOR.NODE_TEXT && tailNbspRegex.test( lastChild.value ) )\r
+                               children.pop();\r
+               }\r
+       }\r
+\r
+       function blockNeedsExtension( block, fromSource, extendEmptyBlock )\r
+       {\r
+               if( !fromSource && ( !extendEmptyBlock ||\r
+                       typeof extendEmptyBlock == 'function' && ( extendEmptyBlock( block ) === false ) ) )\r
+                       return false;\r
+\r
+        // 1. For IE version >=8,  empty blocks are displayed correctly themself in wysiwiyg;\r
+        // 2. For the rest, at least table cell and list item need no filler space.\r
+        // (#6248)\r
+        if ( fromSource && CKEDITOR.env.ie &&\r
+                ( document.documentMode > 7\r
+                || block.name in CKEDITOR.dtd.tr\r
+                || block.name in CKEDITOR.dtd.$listItem ) )\r
+            return false;\r
+\r
+               var lastChild = lastNoneSpaceChild( block );\r
+\r
+               return !lastChild || lastChild &&\r
+                               ( lastChild.type == CKEDITOR.NODE_ELEMENT && lastChild.name == 'br'\r
+                               // Some of the controls in form needs extension too,\r
+                               // to move cursor at the end of the form. (#4791)\r
+                               || block.name == 'form' && lastChild.name == 'input' );\r
+       }\r
+\r
+       function getBlockExtension( isOutput, emptyBlockFiller )\r
+       {\r
+               return function( node )\r
+               {\r
+                       trimFillers( node, !isOutput );\r
+\r
+                       if ( blockNeedsExtension( node, !isOutput, emptyBlockFiller ) )\r
+                       {\r
+                               if ( isOutput || CKEDITOR.env.ie )\r
+                                       node.add( new CKEDITOR.htmlParser.text( '\xa0' ) );\r
+                               else\r
+                                       node.add( new CKEDITOR.htmlParser.element( 'br', {} ) );\r
+                       }\r
+               };\r
+       }\r
+\r
+       var dtd = CKEDITOR.dtd;\r
+\r
+       // Define orders of table elements.\r
+       var tableOrder = [ 'caption', 'colgroup', 'col', 'thead', 'tfoot', 'tbody' ];\r
+\r
+       // Find out the list of block-like tags that can contain <br>.\r
+       var blockLikeTags = CKEDITOR.tools.extend( {}, dtd.$block, dtd.$listItem, dtd.$tableContent );\r
+       for ( var i in blockLikeTags )\r
+       {\r
+               if ( ! ( 'br' in dtd[i] ) )\r
+                       delete blockLikeTags[i];\r
+       }\r
+       // We just avoid filler in <pre> right now.\r
+       // TODO: Support filler for <pre>, line break is also occupy line height.\r
+       delete blockLikeTags.pre;\r
+       var defaultDataFilterRules =\r
+       {\r
+               elements : {},\r
+               attributeNames :\r
+               [\r
+                       // Event attributes (onXYZ) must not be directly set. They can become\r
+                       // active in the editing area (IE|WebKit).\r
+                       [ ( /^on/ ), 'data-cke-pa-on' ]\r
+               ]\r
+       };\r
+\r
+       var defaultDataBlockFilterRules = { elements : {} };\r
+\r
+       for ( i in blockLikeTags )\r
+               defaultDataBlockFilterRules.elements[ i ] = getBlockExtension();\r
+\r
+       var defaultHtmlFilterRules =\r
+               {\r
+                       elementNames :\r
+                       [\r
+                               // Remove the "cke:" namespace prefix.\r
+                               [ ( /^cke:/ ), '' ],\r
+\r
+                               // Ignore <?xml:namespace> tags.\r
+                               [ ( /^\?xml:namespace$/ ), '' ]\r
+                       ],\r
+\r
+                       attributeNames :\r
+                       [\r
+                               // Attributes saved for changes and protected attributes.\r
+                               [ ( /^data-cke-(saved|pa)-/ ), '' ],\r
+\r
+                               // All "data-cke-" attributes are to be ignored.\r
+                               [ ( /^data-cke-.*/ ), '' ],\r
+\r
+                               [ 'hidefocus', '' ]\r
+                       ],\r
+\r
+                       elements :\r
+                       {\r
+                               $ : function( element )\r
+                               {\r
+                                       var attribs = element.attributes;\r
+\r
+                                       if ( attribs )\r
+                                       {\r
+                                               // Elements marked as temporary are to be ignored.\r
+                                               if ( attribs[ 'data-cke-temp' ] )\r
+                                                       return false;\r
+\r
+                                               // Remove duplicated attributes - #3789.\r
+                                               var attributeNames = [ 'name', 'href', 'src' ],\r
+                                                       savedAttributeName;\r
+                                               for ( var i = 0 ; i < attributeNames.length ; i++ )\r
+                                               {\r
+                                                       savedAttributeName = 'data-cke-saved-' + attributeNames[ i ];\r
+                                                       savedAttributeName in attribs && ( delete attribs[ attributeNames[ i ] ] );\r
+                                               }\r
+                                       }\r
+\r
+                                       return element;\r
+                               },\r
+\r
+                               // The contents of table should be in correct order (#4809).\r
+                               table : function( element )\r
+                               {\r
+                                       var children = element.children;\r
+                                       children.sort( function ( node1, node2 )\r
+                                                                  {\r
+                                                                          return node1.type == CKEDITOR.NODE_ELEMENT && node2.type == node1.type ?\r
+                                                                                       CKEDITOR.tools.indexOf( tableOrder, node1.name )  > CKEDITOR.tools.indexOf( tableOrder, node2.name ) ? 1 : -1 : 0;\r
+                                                                  } );\r
+                               },\r
+\r
+                               embed : function( element )\r
+                               {\r
+                                       var parent = element.parent;\r
+\r
+                                       // If the <embed> is child of a <object>, copy the width\r
+                                       // and height attributes from it.\r
+                                       if ( parent && parent.name == 'object' )\r
+                                       {\r
+                                               var parentWidth = parent.attributes.width,\r
+                                                       parentHeight = parent.attributes.height;\r
+                                               parentWidth && ( element.attributes.width = parentWidth );\r
+                                               parentHeight && ( element.attributes.height = parentHeight );\r
+                                       }\r
+                               },\r
+                               // Restore param elements into self-closing.\r
+                               param : function( param )\r
+                               {\r
+                                       param.children = [];\r
+                                       param.isEmpty = true;\r
+                                       return param;\r
+                               },\r
+\r
+                               // Remove empty link but not empty anchor.(#3829)\r
+                               a : function( element )\r
+                               {\r
+                                       if ( !( element.children.length ||\r
+                                                       element.attributes.name ||\r
+                                                       element.attributes[ 'data-cke-saved-name' ] ) )\r
+                                       {\r
+                                               return false;\r
+                                       }\r
+                               },\r
+\r
+                               // Remove dummy span in webkit.\r
+                               span: function( element )\r
+                               {\r
+                                       if ( element.attributes[ 'class' ] == 'Apple-style-span' )\r
+                                               delete element.name;\r
+                               },\r
+\r
+                               // Empty <pre> in IE is reported with filler node (&nbsp;).\r
+                               pre : function( element ) { CKEDITOR.env.ie && trimFillers( element ); },\r
+\r
+                               html : function( element )\r
+                               {\r
+                                       delete element.attributes.contenteditable;\r
+                                       delete element.attributes[ 'class' ];\r
+                               },\r
+\r
+                               body : function( element )\r
+                               {\r
+                                       delete element.attributes.spellcheck;\r
+                                       delete element.attributes.contenteditable;\r
+                               },\r
+\r
+                               style : function( element )\r
+                               {\r
+                                       var child = element.children[ 0 ];\r
+                                       child && child.value && ( child.value = CKEDITOR.tools.trim( child.value ));\r
+\r
+                                       if ( !element.attributes.type )\r
+                                               element.attributes.type = 'text/css';\r
+                               },\r
+\r
+                               title : function( element )\r
+                               {\r
+                                       var titleText = element.children[ 0 ];\r
+                                       titleText && ( titleText.value = element.attributes[ 'data-cke-title' ] || '' );\r
+                               }\r
+                       },\r
+\r
+                       attributes :\r
+                       {\r
+                               'class' : function( value, element )\r
+                               {\r
+                                       // Remove all class names starting with "cke_".\r
+                                       return CKEDITOR.tools.ltrim( value.replace( /(?:^|\s+)cke_[^\s]*/g, '' ) ) || false;\r
+                               }\r
+                       }\r
+               };\r
+\r
+       if ( CKEDITOR.env.ie )\r
+       {\r
+               // IE outputs style attribute in capital letters. We should convert\r
+               // them back to lower case, while not hurting the values (#5930)\r
+               defaultHtmlFilterRules.attributes.style = function( value, element )\r
+               {\r
+                       return value.replace( /(^|;)([^\:]+)/g, function( match )\r
+                               {\r
+                                       return match.toLowerCase();\r
+                               });\r
+               };\r
+       }\r
+\r
+       function protectReadOnly( element )\r
+       {\r
+               var attrs = element.attributes;\r
+\r
+               // We should flag that the element was locked by our code so\r
+               // it'll be editable by the editor functions (#6046).\r
+               if ( attrs.contenteditable != "false" )\r
+                       attrs[ 'data-cke-editable' ] = attrs.contenteditable ? 'true' : 1;\r
+\r
+               attrs.contenteditable = "false";\r
+       }\r
+       function unprotectReadyOnly( element )\r
+       {\r
+               var attrs = element.attributes;\r
+               switch( attrs[ 'data-cke-editable' ] )\r
+               {\r
+                       case 'true':    attrs.contenteditable = 'true'; break;\r
+                       case '1':               delete attrs.contenteditable;   break;\r
+               }\r
+       }\r
+       // Disable form elements editing mode provided by some browers. (#5746)\r
+       for ( i in { input : 1, textarea : 1 } )\r
+       {\r
+               defaultDataFilterRules.elements[ i ] = protectReadOnly;\r
+               defaultHtmlFilterRules.elements[ i ] = unprotectReadyOnly;\r
+       }\r
+\r
+       var protectElementRegex = /<(a|area|img|input)\b([^>]*)>/gi,\r
+               protectAttributeRegex = /\b(href|src|name)\s*=\s*(?:(?:"[^"]*")|(?:'[^']*')|(?:[^ "'>]+))/gi;\r
+\r
+       var protectElementsRegex = /(?:<style(?=[ >])[^>]*>[\s\S]*<\/style>)|(?:<(:?link|meta|base)[^>]*>)/gi,\r
+               encodedElementsRegex = /<cke:encoded>([^<]*)<\/cke:encoded>/gi;\r
+\r
+       var protectElementNamesRegex = /(<\/?)((?:object|embed|param|html|body|head|title)[^>]*>)/gi,\r
+               unprotectElementNamesRegex = /(<\/?)cke:((?:html|body|head|title)[^>]*>)/gi;\r
+\r
+       var protectSelfClosingRegex = /<cke:(param|embed)([^>]*?)\/?>(?!\s*<\/cke:\1)/gi;\r
+\r
+       function protectAttributes( html )\r
+       {\r
+               return html.replace( protectElementRegex, function( element, tag, attributes )\r
+               {\r
+                       return '<' +  tag + attributes.replace( protectAttributeRegex, function( fullAttr, attrName )\r
+                       {\r
+                               // We should not rewrite the existed protected attributes, e.g. clipboard content from editor. (#5218)\r
+                               if ( attributes.indexOf( 'data-cke-saved-' + attrName ) == -1 )\r
+                                       return ' data-cke-saved-' + fullAttr + ' ' + fullAttr;\r
+\r
+                               return fullAttr;\r
+                       }) + '>';\r
+               });\r
+       }\r
+\r
+       function protectElements( html )\r
+       {\r
+               return html.replace( protectElementsRegex, function( match )\r
+                       {\r
+                               return '<cke:encoded>' + encodeURIComponent( match ) + '</cke:encoded>';\r
+                       });\r
+       }\r
+\r
+       function unprotectElements( html )\r
+       {\r
+               return html.replace( encodedElementsRegex, function( match, encoded )\r
+                       {\r
+                               return decodeURIComponent( encoded );\r
+                       });\r
+       }\r
+\r
+       function protectElementsNames( html )\r
+       {\r
+               return html.replace( protectElementNamesRegex, '$1cke:$2');\r
+       }\r
+\r
+       function unprotectElementNames( html )\r
+       {\r
+               return html.replace( unprotectElementNamesRegex, '$1$2' );\r
+       }\r
+\r
+       function protectSelfClosingElements( html )\r
+       {\r
+               return html.replace( protectSelfClosingRegex, '<cke:$1$2></cke:$1>' );\r
+       }\r
+\r
+       function protectPreFormatted( html )\r
+       {\r
+               return html.replace( /(<pre\b[^>]*>)(\r\n|\n)/g, '$1$2$2' );\r
+       }\r
+\r
+       function protectRealComments( html )\r
+       {\r
+               return html.replace( /<!--(?!{cke_protected})[\s\S]+?-->/g, function( match )\r
+                       {\r
+                               return '<!--' + protectedSourceMarker +\r
+                                               '{C}' +\r
+                                               encodeURIComponent( match ).replace( /--/g, '%2D%2D' ) +\r
+                                               '-->';\r
+                       });\r
+       }\r
+\r
+       function unprotectRealComments( html )\r
+       {\r
+               return html.replace( /<!--\{cke_protected\}\{C\}([\s\S]+?)-->/g, function( match, data )\r
+                       {\r
+                               return decodeURIComponent( data );\r
+                       });\r
+       }\r
+\r
+       function unprotectSource( html, editor )\r
+       {\r
+               var store = editor._.dataStore;\r
+\r
+               return html.replace( /<!--\{cke_protected\}([\s\S]+?)-->/g, function( match, data )\r
+                       {\r
+                               return decodeURIComponent( data );\r
+                       }).replace( /\{cke_protected_(\d+)\}/g, function( match, id )\r
+                       {\r
+                               return store && store[ id ] || '';\r
+                       });\r
+       }\r
+\r
+       function protectSource( data, editor )\r
+       {\r
+               var protectedHtml = [],\r
+                       protectRegexes = editor.config.protectedSource,\r
+                       store = editor._.dataStore || ( editor._.dataStore = { id : 1 } ),\r
+                       tempRegex = /<\!--\{cke_temp(comment)?\}(\d*?)-->/g;\r
+\r
+               var regexes =\r
+                       [\r
+                               // Script tags will also be forced to be protected, otherwise\r
+                               // IE will execute them.\r
+                               ( /<script[\s\S]*?<\/script>/gi ),\r
+\r
+                               // <noscript> tags (get lost in IE and messed up in FF).\r
+                               /<noscript[\s\S]*?<\/noscript>/gi\r
+                       ]\r
+                       .concat( protectRegexes );\r
+\r
+               // First of any other protection, we must protect all comments\r
+               // to avoid loosing them (of course, IE related).\r
+               // Note that we use a different tag for comments, as we need to\r
+               // transform them when applying filters.\r
+               data = data.replace( (/<!--[\s\S]*?-->/g), function( match )\r
+                       {\r
+                               return  '<!--{cke_tempcomment}' + ( protectedHtml.push( match ) - 1 ) + '-->';\r
+                       });\r
+\r
+               for ( var i = 0 ; i < regexes.length ; i++ )\r
+               {\r
+                       data = data.replace( regexes[i], function( match )\r
+                               {\r
+                                       match = match.replace( tempRegex,               // There could be protected source inside another one. (#3869).\r
+                                               function( $, isComment, id )\r
+                                               {\r
+                                                       return protectedHtml[ id ];\r
+                                               }\r
+                                       );\r
+\r
+                                       // Avoid protecting over protected, e.g. /\{.*?\}/\r
+                                       return ( /cke_temp(comment)?/ ).test( match ) ? match\r
+                                               : '<!--{cke_temp}' + ( protectedHtml.push( match ) - 1 ) + '-->';\r
+                               });\r
+               }\r
+               data = data.replace( tempRegex, function( $, isComment, id )\r
+                       {\r
+                               return '<!--' + protectedSourceMarker +\r
+                                               ( isComment ? '{C}' : '' ) +\r
+                                               encodeURIComponent( protectedHtml[ id ] ).replace( /--/g, '%2D%2D' ) +\r
+                                               '-->';\r
+                       }\r
+               );\r
+\r
+               // Different protection pattern is used for those that\r
+               // live in attributes to avoid from being HTML encoded.\r
+               return data.replace( /(['"]).*?\1/g, function ( match )\r
+               {\r
+                       return match.replace( /<!--\{cke_protected\}([\s\S]+?)-->/g, function( match, data )\r
+                       {\r
+                               store[ store.id ] = decodeURIComponent( data );\r
+                               return '{cke_protected_'+ ( store.id++ )  + '}';\r
+                       });\r
+               });\r
+       }\r
+\r
+       CKEDITOR.plugins.add( 'htmldataprocessor',\r
+       {\r
+               requires : [ 'htmlwriter' ],\r
+\r
+               init : function( editor )\r
+               {\r
+                       var dataProcessor = editor.dataProcessor = new CKEDITOR.htmlDataProcessor( editor );\r
+\r
+                       dataProcessor.writer.forceSimpleAmpersand = editor.config.forceSimpleAmpersand;\r
+\r
+                       dataProcessor.dataFilter.addRules( defaultDataFilterRules );\r
+                       dataProcessor.dataFilter.addRules( defaultDataBlockFilterRules );\r
+                       dataProcessor.htmlFilter.addRules( defaultHtmlFilterRules );\r
+\r
+                       var defaultHtmlBlockFilterRules = { elements : {} };\r
+                       for ( i in blockLikeTags )\r
+                               defaultHtmlBlockFilterRules.elements[ i ] = getBlockExtension( true, editor.config.fillEmptyBlocks );\r
+\r
+                       dataProcessor.htmlFilter.addRules( defaultHtmlBlockFilterRules );\r
+               },\r
+\r
+               onLoad : function()\r
+               {\r
+                       ! ( 'fillEmptyBlocks' in CKEDITOR.config ) && ( CKEDITOR.config.fillEmptyBlocks = 1 );\r
+               }\r
+       });\r
+\r
+       CKEDITOR.htmlDataProcessor = function( editor )\r
+       {\r
+               this.editor = editor;\r
+\r
+               this.writer = new CKEDITOR.htmlWriter();\r
+               this.dataFilter = new CKEDITOR.htmlParser.filter();\r
+               this.htmlFilter = new CKEDITOR.htmlParser.filter();\r
+       };\r
+\r
+       CKEDITOR.htmlDataProcessor.prototype =\r
+       {\r
+               toHtml : function( data, fixForBody )\r
+               {\r
+                       // The source data is already HTML, but we need to clean\r
+                       // it up and apply the filter.\r
+\r
+                       data = protectSource( data, this.editor );\r
+\r
+                       // Before anything, we must protect the URL attributes as the\r
+                       // browser may changing them when setting the innerHTML later in\r
+                       // the code.\r
+                       data = protectAttributes( data );\r
+\r
+                       // Protect elements than can't be set inside a DIV. E.g. IE removes\r
+                       // style tags from innerHTML. (#3710)\r
+                       data = protectElements( data );\r
+\r
+                       // Certain elements has problem to go through DOM operation, protect\r
+                       // them by prefixing 'cke' namespace. (#3591)\r
+                       data = protectElementsNames( data );\r
+\r
+                       // All none-IE browsers ignore self-closed custom elements,\r
+                       // protecting them into open-close. (#3591)\r
+                       data = protectSelfClosingElements( data );\r
+\r
+                       // Compensate one leading line break after <pre> open as browsers\r
+                       // eat it up. (#5789)\r
+                       data = protectPreFormatted( data );\r
+\r
+                       // Call the browser to help us fixing a possibly invalid HTML\r
+                       // structure.\r
+                       var div = new CKEDITOR.dom.element( 'div' );\r
+                       // Add fake character to workaround IE comments bug. (#3801)\r
+                       div.setHtml( 'a' + data );\r
+                       data = div.getHtml().substr( 1 );\r
+\r
+                       // Unprotect "some" of the protected elements at this point.\r
+                       data = unprotectElementNames( data );\r
+\r
+                       data = unprotectElements( data );\r
+\r
+                       // Restore the comments that have been protected, in this way they\r
+                       // can be properly filtered.\r
+                       data = unprotectRealComments( data );\r
+\r
+                       // Now use our parser to make further fixes to the structure, as\r
+                       // well as apply the filter.\r
+                       var fragment = CKEDITOR.htmlParser.fragment.fromHtml( data, fixForBody ),\r
+                               writer = new CKEDITOR.htmlParser.basicWriter();\r
+\r
+                       fragment.writeHtml( writer, this.dataFilter );\r
+                       data = writer.getHtml( true );\r
+\r
+                       // Protect the real comments again.\r
+                       data = protectRealComments( data );\r
+\r
+                       return data;\r
+               },\r
+\r
+               toDataFormat : function( html, fixForBody )\r
+               {\r
+                       var writer = this.writer,\r
+                               fragment = CKEDITOR.htmlParser.fragment.fromHtml( html, fixForBody );\r
+\r
+                       writer.reset();\r
+\r
+                       fragment.writeHtml( writer, this.htmlFilter );\r
+\r
+                       var data = writer.getHtml( true );\r
+\r
+                       // Restore those non-HTML protected source. (#4475,#4880)\r
+                       data = unprotectRealComments( data );\r
+                       data = unprotectSource( data, this.editor );\r
+\r
+                       return data;\r
+               }\r
+       };\r
+})();\r
+\r
+/**\r
+ * Whether to force using "&" instead of "&amp;amp;" in elements attributes\r
+ * values, it's not recommended to change this setting for compliance with the\r
+ * W3C XHTML 1.0 standards (<a href="http://www.w3.org/TR/xhtml1/#C_12">C.12, XHTML 1.0</a>).\r
+ * @name CKEDITOR.config.forceSimpleAmpersand\r
+ * @name CKEDITOR.config.forceSimpleAmpersand\r
+ * @type Boolean\r
+ * @default false\r
+ * @example\r
+ * config.forceSimpleAmpersand = false;\r
+ */\r
+\r
+/**\r
+ * Whether a filler text (non-breaking space entity - &nbsp;) will be inserted into empty block elements in HTML output,\r
+ * this is used to render block elements properly with line-height; When a function is instead specified,\r
+ * it'll be passed a {@link CKEDITOR.htmlParser.element} to decide whether adding the filler text\r
+ * by expecting a boolean return value.\r
+ * @name CKEDITOR.config.fillEmptyBlocks\r
+ * @since 3.5\r
+ * @type Boolean\r
+ * @default true\r
+ * @example\r
+ * config.fillEmptyBlocks = false;     // Prevent filler nodes in all empty blocks.\r
+ *\r
+ * // Prevent filler node only in float cleaners.\r
+ * config.fillEmptyBlocks = function( element )\r
+ * {\r
+ *     if ( element.attributes[ 'class' ].indexOf ( 'clear-both' ) != -1 )\r
+ *             return false;\r
+ * }\r
+ */\r