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/*<\/span><\/div>
 * BBCode.js - javascript BBCode module by Zhang Qingcheng <kinch.zhang@gmail.com><\/span><\/div>
 *<\/span><\/div>
 * usage:<\/span><\/div>
 *<\/span><\/div>
 *     1. load this module<\/span><\/div>
 *     <script type="text/javascript" src="<?php echo get_domain_name_by_app('js', true);?>/c/BBCode.js"></script><\/span><\/div>
 *<\/span><\/div>
 *     2. get an instance to use it<\/span><\/div>
 *     <script type="text/javascript"><\/span><\/div>
 *         var bbcode = new BBCode();<\/span><\/div>
 *<\/span><\/div>
 *         if (! bbcode.isValid(bbcode))<\/span><\/div>
 *         {<\/span><\/div>
 *             alert('bbcode is invalid!');<\/span><\/div>
 *<\/span><\/div>
 *             return false;<\/span><\/div>
 *         }<\/span><\/div>
 *     </script><\/span><\/div>
 *<\/span><\/div>
 */<\/span><\/div>
(<\/span>function<\/span>(){<\/span><\/div>
    var<\/span> BBCode<\/span> =<\/span> window<\/span>.<\/span>BBCode<\/span> =<\/span> function<\/span>()<\/span> {}<\/span><\/div>
 <\/div>
    BBCode<\/span>.<\/span>prototype<\/span> =<\/span> {<\/span><\/div>
        /**<\/span><\/div>
         * check if the given bbcode is valid<\/span><\/div>
         *<\/span><\/div>
         * @param String bbcode<\/span><\/div>
         * @returns Boolean true/false<\/span><\/div>
         * @description this function returns true if the given bbcode in well-formed<\/span><\/div>
         */<\/span><\/div>
        'isValid'<\/span> :<\/span> function<\/span>(<\/span>content<\/span>)<\/span> {<\/span><\/div>
            /*<\/span><\/div>
             * 检查一段内容中包含的UBB的格式是否正确<\/span><\/div>
             *<\/span><\/div>
             */<\/span><\/div>
 <\/div>
            if<\/span> (<\/span>content<\/span>.<\/span>length<\/span> ==<\/span> 0<\/span>)<\/span><\/div>
                return<\/span> false<\/span>;<\/span><\/div>
 <\/div>
            var<\/span> stack<\/span> =<\/span> [];<\/span><\/div>
            var<\/span> depth<\/span> =<\/span> 0<\/span>;<\/span><\/div>
            var<\/span> errors<\/span> =<\/span> 0<\/span>;<\/span><\/div>
            var<\/span> unmatched<\/span> =<\/span> 0<\/span>;<\/span><\/div>
            var<\/span> options<\/span> =<\/span> {<\/span><\/div>
                'b'<\/span> :<\/span> 'no_arg'<\/span>,<\/span><\/div>
                'i'<\/span> :<\/span> 'no_arg'<\/span>,<\/span><\/div>
                'u'<\/span> :<\/span> 'no_arg'<\/span>,<\/span><\/div>
                'url'<\/span> :<\/span> 'opt_arg'<\/span>,<\/span><\/div>
                'img'<\/span> :<\/span> 'no_arg'<\/span>,<\/span><\/div>
                'swf'<\/span> :<\/span> 'no_arg'<\/span>,<\/span><\/div>
                'wmv'<\/span> :<\/span> 'no_arg'<\/span>,<\/span><\/div>
                'rm'<\/span> :<\/span> 'no_arg'<\/span>,<\/span><\/div>
                'media'<\/span> :<\/span> 'arg'<\/span>,<\/span><\/div>
                'size'<\/span> :<\/span> 'arg'<\/span>,<\/span><\/div>
                'quote'<\/span> :<\/span> 'no_arg'<\/span>,<\/span><\/div>
                'list'<\/span> :<\/span> 'opt_arg'<\/span>,<\/span><\/div>
                'color'<\/span> :<\/span> 'arg'<\/span>,<\/span><\/div>
                'dstaic'<\/span> :<\/span> 'no_arg'<\/span>,<\/span><\/div>
                'attach'<\/span> :<\/span> 'no_arg'<\/span>,<\/span><\/div>
                'align'<\/span> :<\/span> 'arg'<\/span>,<\/span><\/div>
                'p'<\/span> :<\/span> 'no_arg'<\/span>,<\/span><\/div>
                'font'<\/span>:<\/span> 'arg'<\/span>,<\/span><\/div>
                'color'<\/span> :<\/span> 'arg'<\/span>,<\/span><\/div>
                'table'<\/span> :<\/span> 'opt_arg'<\/span>,<\/span><\/div>
                'tr'<\/span> :<\/span> 'opt_arg'<\/span>,<\/span><\/div>
                'td'<\/span> :<\/span> 'opt_arg'<\/span>,<\/span><\/div>
                'desc'<\/span> :<\/span> 'no_arg'<\/span>,<\/span><\/div>
                'hide'<\/span> :<\/span> 'no_arg'<\/span>,<\/span><\/div>
                'fly'<\/span> :<\/span> 'no_arg'<\/span>,<\/span><\/div>
                'code'<\/span> :<\/span> 'no_arg'<\/span>,<\/span><\/div>
                'email'<\/span> :<\/span> 'no_arg'<\/span>,<\/span><\/div>
                '*'<\/span>:<\/span> 'opt_arg'<\/span>,<\/span><\/div>
                'tempfile'<\/span>:<\/span> 'no_arg'<\/span><\/div>
            };<\/span><\/div>
 <\/div>
            var<\/span> strictRule<\/span> =<\/span> [<\/span>'img'<\/span>,<\/span> 'swf'<\/span>,<\/span> 'wmv'<\/span>,<\/span> 'media'<\/span>,<\/span> 'rm'<\/span>,<\/span> 'dstatic'<\/span>,<\/span> 'email'<\/span>];<\/span><\/div>
 <\/div>
            // strip faces and br if any<\/span><\/div>
            if<\/span> (<\/span>content<\/span>.<\/span>indexOf<\/span>(<\/span>'[face_'<\/span>)<\/span> !=<\/span> -<\/span>1<\/span>)<\/span><\/div>
                content<\/span> =<\/span> content<\/span>.<\/span>replace<\/span>(<\/span>/\\[face_[0-9]+\\]/g<\/span>,<\/span> ''<\/span>);<\/span><\/div>
 <\/div>
            if<\/span> (<\/span>content<\/span>.<\/span>indexOf<\/span>(<\/span>'[br]'<\/span>)<\/span> !=<\/span> -<\/span>1<\/span>)<\/span><\/div>
                content<\/span> =<\/span> content<\/span>.<\/span>replace<\/span>(<\/span>/\\[br\\]/g<\/span>,<\/span> ''<\/span>);<\/span><\/div>
 <\/div>
            parseBBCode<\/span>(<\/span>content<\/span>);<\/span><\/div>
 <\/div>
            console<\/span>.<\/span>info<\/span>(<\/span>'all errer count: '<\/span> +<\/span> errors<\/span>);<\/span><\/div>
 <\/div>
            return<\/span> (<\/span>errors<\/span> ==<\/span> 0<\/span>)<\/span> &&<\/span> (<\/span>unmatched<\/span> ==<\/span> 0<\/span>);<\/span><\/div>
 <\/div>
            function<\/span> in_array<\/span>(<\/span>needle<\/span>,<\/span> haystack<\/span>,<\/span> isStrict<\/span>)<\/span><\/div>
            {<\/span><\/div>
                var<\/span> found<\/span> =<\/span> false<\/span>,<\/span> key<\/span>;<\/span><\/div>
 <\/div>
                for<\/span> (<\/span>key<\/span> in<\/span> haystack<\/span>)<\/span> {<\/span><\/div>
                    if<\/span> ((<\/span>isStrict<\/span> &&<\/span> haystack<\/span>[<\/span>key<\/span>]<\/span> ===<\/span> needle<\/span>)<\/span><\/div>
                        ||<\/span><\/div>
                        (<\/span>!<\/span>isStrict<\/span> &&<\/span> haystack<\/span>[<\/span>key<\/span>]<\/span> ==<\/span> needle<\/span>)<\/span><\/div>
                       )<\/span><\/div>
                    {<\/span><\/div>
                        found<\/span> =<\/span> true<\/span>;<\/span><\/div>
                        break<\/span>;<\/span><\/div>
                    }<\/span><\/div>
                }<\/span><\/div>
 <\/div>
                return<\/span> found<\/span>;<\/span><\/div>
            }<\/span><\/div>
 <\/div>
            function<\/span> hasQuotes<\/span>(<\/span>str<\/span>)<\/span><\/div>
            {<\/span><\/div>
                return<\/span> (<\/span>str<\/span>.<\/span>indexOf<\/span>(<\/span>'"'<\/span>)<\/span> !=<\/span> -<\/span>1<\/span>)<\/span> ||<\/span><\/div>
                        (<\/span>str<\/span>.<\/span>indexOf<\/span>(<\/span>"'"<\/span>)<\/span> !=<\/span> -<\/span>1<\/span>);<\/span><\/div>
            }<\/span><\/div>
 <\/div>
            function<\/span> checkParam<\/span>(<\/span>param<\/span>)<\/span><\/div>
            {<\/span><\/div>
                console<\/span>.<\/span>log<\/span>(<\/span>'checking param: -> '<\/span> +<\/span> param<\/span>);<\/span><\/div>
                if<\/span> ((<\/span>param<\/span>[<\/span>0<\/span>]<\/span> ==<\/span> '"'<\/span> ||<\/span> param<\/span>[<\/span>0<\/span>]<\/span> ==<\/span> "'"<\/span>))<\/span><\/div>
                {<\/span><\/div>
                    var<\/span> last<\/span> =<\/span> param<\/span>.<\/span>length<\/span> -<\/span> 1<\/span>;<\/span><\/div>
                    if<\/span> (<\/span>param<\/span>[<\/span>0<\/span>]<\/span> !=<\/span> param<\/span>[<\/span>last<\/span>])<\/span><\/div>
                    {<\/span><\/div>
                        console<\/span>.<\/span>log<\/span>(<\/span>'quote not match: ('<\/span> +<\/span> param<\/span>[<\/span>0<\/span>]);<\/span><\/div>
                        return<\/span> 1<\/span>;<\/span><\/div>
                    }<\/span><\/div>
                    else<\/span> if<\/span> (<\/span>hasQuotes<\/span>(<\/span>param<\/span>.<\/span>substring<\/span>(<\/span>1<\/span>,<\/span> last<\/span> -<\/span> 1<\/span>)))<\/span><\/div>
                    {<\/span><\/div>
                        console<\/span>.<\/span>log<\/span>(<\/span>'extra quotes found'<\/span>);<\/span><\/div>
                        return<\/span> 1<\/span>;<\/span><\/div>
                    }<\/span><\/div>
                }<\/span><\/div>
                else<\/span> if<\/span> (<\/span>hasQuotes<\/span>(<\/span>param<\/span>))<\/span><\/div>
                {<\/span><\/div>
                    return<\/span> 1<\/span>;<\/span><\/div>
                }<\/span><\/div>
 <\/div>
                return<\/span> 0<\/span>;<\/span><\/div>
            }<\/span><\/div>
 <\/div>
            function<\/span> parseBBCode<\/span>(<\/span>content<\/span>)<\/span><\/div>
            {<\/span><\/div>
                if<\/span> (<\/span>content<\/span>.<\/span>length<\/span> ==<\/span> 0<\/span>)<\/span><\/div>
                    return<\/span> true<\/span>;<\/span><\/div>
 <\/div>
                if<\/span> (<\/span>depth<\/span> <<\/span> 1000<\/span>)<\/span><\/div>
                    depth<\/span>++<\/span>;<\/span><\/div>
                else<\/span><\/div>
                    throw<\/span> "Max depth of 1000 recursion reached"<\/span>;<\/span><\/div>
 <\/div>
                var<\/span> head<\/span> =<\/span> content<\/span>.<\/span>indexOf<\/span>(<\/span>'['<\/span>);<\/span><\/div>
                var<\/span> tail<\/span> =<\/span> content<\/span>.<\/span>indexOf<\/span>(<\/span>']'<\/span>);<\/span><\/div>
 <\/div>
                if<\/span> (<\/span> head<\/span> ==<\/span> -<\/span>1<\/span> &&<\/span> tail<\/span> ==<\/span> -<\/span>1<\/span>)<\/span><\/div>
                    // no bbcode<\/span><\/div>
                    return<\/span> true<\/span>;<\/span><\/div>
 <\/div>
                if<\/span> ((<\/span>head<\/span> ==<\/span> -<\/span>1<\/span> &&<\/span> tail<\/span> ><\/span> -<\/span>1<\/span>)<\/span> ||<\/span><\/div>
                    (<\/span>head<\/span> ><\/span> -<\/span>1<\/span> &&<\/span> tail<\/span> ==<\/span> -<\/span>1<\/span>)<\/span> ||<\/span><\/div>
                    (<\/span>head<\/span> ><\/span> -<\/span>1<\/span> &&<\/span> tail<\/span> ><\/span> -<\/span>1<\/span> &&<\/span> head<\/span> ><\/span> tail<\/span>)<\/span><\/div>
                   )<\/span><\/div>
                {<\/span><\/div>
                    errors<\/span>++<\/span>;<\/span><\/div>
 <\/div>
                    console<\/span>.<\/span>info<\/span>(<\/span>'error count: '<\/span> +<\/span> errors<\/span> +<\/span> '::head and tail not match'<\/span>);<\/span><\/div>
 <\/div>
                    return<\/span>;<\/span><\/div>
                }<\/span><\/div>
 <\/div>
                tag<\/span> =<\/span> content<\/span>.<\/span>substring<\/span>(<\/span>head<\/span> +<\/span> 1<\/span>,<\/span> tail<\/span>);<\/span><\/div>
 <\/div>
                if<\/span> (<\/span>tag<\/span>.<\/span>length<\/span> ==<\/span> 0<\/span>)<\/span> {<\/span><\/div>
                    errors<\/span>++<\/span>;<\/span><\/div>
                    console<\/span>.<\/span>info<\/span>(<\/span>'error count: '<\/span> +<\/span> errors<\/span> +<\/span> '::empty tag'<\/span>);<\/span><\/div>
 <\/div>
                    return<\/span>;<\/span><\/div>
                }<\/span><\/div>
 <\/div>
                if<\/span> (<\/span>tag<\/span>[<\/span>0<\/span>]<\/span> !=<\/span> '/'<\/span>)<\/span> {<\/span><\/div>
                    // open tag<\/span><\/div>
                    console<\/span>.<\/span>info<\/span>(<\/span>'enter opening tag: '<\/span> +<\/span> tag<\/span>);<\/span><\/div>
                    // check paramters<\/span><\/div>
                    var<\/span> pos<\/span> =<\/span> tag<\/span>.<\/span>indexOf<\/span>(<\/span>'='<\/span>);<\/span><\/div>
 <\/div>
                    if<\/span> (<\/span>pos<\/span> ==<\/span> -<\/span>1<\/span>)<\/span> {<\/span><\/div>
                        if<\/span> (<\/span>!<\/span>options<\/span>[<\/span>tag<\/span>])<\/span> {<\/span><\/div>
                            // invalid tag<\/span><\/div>
                            errors<\/span>++<\/span>;<\/span><\/div>
                            console<\/span>.<\/span>info<\/span>(<\/span>'error count: '<\/span> +<\/span> errors<\/span> +<\/span> '::invalid tag name -> '<\/span> +<\/span> tag<\/span>);<\/span><\/div>
 <\/div>
                            return<\/span>;<\/span><\/div>
                        }<\/span><\/div>
 <\/div>
                        if<\/span> (<\/span>options<\/span>[<\/span>tag<\/span>]<\/span> ==<\/span> 'arg'<\/span>)<\/span> {<\/span><\/div>
                            errors<\/span>++<\/span>;<\/span><\/div>
                            console<\/span>.<\/span>info<\/span>(<\/span>'error count: '<\/span> +<\/span> errors<\/span> +<\/span> '::tag -> '<\/span> +<\/span> tag_name<\/span> +<\/span> ' should have arg'<\/span>);<\/span><\/div>
 <\/div>
                            return<\/span>;<\/span><\/div>
                        }<\/span><\/div>
 <\/div>
                        stack<\/span>.<\/span>push<\/span>(<\/span>tag<\/span>);<\/span><\/div>
                    }<\/span> else<\/span> {<\/span><\/div>
                        var<\/span> tag_name<\/span> =<\/span> tag<\/span>.<\/span>substring<\/span>(<\/span>0<\/span>,<\/span> pos<\/span>);<\/span><\/div>
                        if<\/span> (<\/span>!<\/span>options<\/span>[<\/span>tag_name<\/span>])<\/span> {<\/span><\/div>
                            // invalid tag<\/span><\/div>
                            errors<\/span>++<\/span>;<\/span><\/div>
                            console<\/span>.<\/span>info<\/span>(<\/span>'error count: '<\/span> +<\/span> errors<\/span> +<\/span> '::invalid tag name -> '<\/span> +<\/span> tag_name<\/span>);<\/span><\/div>
 <\/div>
                            return<\/span>;<\/span><\/div>
                        }<\/span><\/div>
 <\/div>
                        if<\/span> (<\/span>options<\/span>[<\/span>tag_name<\/span>]<\/span> ==<\/span> 'no_arg'<\/span>)<\/span> {<\/span><\/div>
                            errors<\/span>++<\/span>;<\/span><\/div>
                            console<\/span>.<\/span>info<\/span>(<\/span>'error count: '<\/span> +<\/span> errors<\/span> +<\/span> '::tag -> '<\/span> +<\/span> tag_name<\/span> +<\/span> ' should have no arg'<\/span>);<\/span><\/div>
 <\/div>
                            return<\/span>;<\/span><\/div>
                        }<\/span><\/div>
 <\/div>
                        errors<\/span> +=<\/span> checkParam<\/span>(<\/span>tag<\/span>.<\/span>substring<\/span>(<\/span>pos<\/span> +<\/span> 1<\/span>));<\/span><\/div>
 <\/div>
                        if<\/span> (<\/span>errors<\/span> ><\/span> 0<\/span>)<\/span><\/div>
                            return<\/span>;<\/span><\/div>
 <\/div>
                        stack<\/span>.<\/span>push<\/span>(<\/span>tag_name<\/span>);<\/span><\/div>
                    }<\/span><\/div>
 <\/div>
                    unmatched<\/span> ++<\/span>;<\/span><\/div>
                    console<\/span>.<\/span>info<\/span>(<\/span>'unmatch count: '<\/span> +<\/span> unmatched<\/span>);<\/span><\/div>
                }<\/span> else<\/span> {<\/span><\/div>
                    // close tag<\/span><\/div>
                    tag_name<\/span> =<\/span> tag<\/span>.<\/span>substring<\/span>(<\/span>1<\/span>);<\/span><\/div>
 <\/div>
                    if<\/span> (<\/span>!<\/span>options<\/span>[<\/span>tag_name<\/span>])<\/span> {<\/span><\/div>
                        // invalid tag<\/span><\/div>
                        errors<\/span>++<\/span>;<\/span><\/div>
                        console<\/span>.<\/span>info<\/span>(<\/span>'error count: '<\/span> +<\/span> errors<\/span> +<\/span> '::invalid tag name or empty tag -> '<\/span> +<\/span> tag_name<\/span>);<\/span><\/div>
 <\/div>
                        return<\/span>;<\/span><\/div>
                    }<\/span><\/div>
 <\/div>
                    console<\/span>.<\/span>info<\/span>(<\/span>'enter close tag: '<\/span> +<\/span> tag<\/span>);<\/span><\/div>
 <\/div>
                    unmatched<\/span> --<\/span>;<\/span><\/div>
                    console<\/span>.<\/span>info<\/span>(<\/span>'unmatch count: '<\/span> +<\/span> unmatched<\/span>);<\/span><\/div>
 <\/div>
                    if<\/span> (<\/span>stack<\/span>.<\/span>length<\/span> ==<\/span> 0<\/span>)<\/span> {<\/span><\/div>
                        errors<\/span>++<\/span>;<\/span><\/div>
                        console<\/span>.<\/span>info<\/span>(<\/span>'error count: '<\/span> +<\/span> errors<\/span> +<\/span> '::stack is empty, too many close tag'<\/span>);<\/span><\/div>
 <\/div>
                        return<\/span>;<\/span><\/div>
                    }<\/span><\/div>
 <\/div>
                    // check if the open tag and closing tag is match <\/span><\/div>
                    open<\/span> =<\/span> stack<\/span>.<\/span>pop<\/span>();<\/span><\/div>
 <\/div>
                    if<\/span> (<\/span>open<\/span> !=<\/span> tag_name<\/span>)<\/span><\/div>
                    {<\/span><\/div>
                        if<\/span> (<\/span>in_array<\/span>(<\/span>open<\/span>,<\/span> strictRule<\/span>,<\/span> true<\/span>)<\/span> ||<\/span> in_array<\/span>(<\/span>tag_name<\/span>,<\/span> strictRule<\/span>,<\/span> true<\/span>))<\/span><\/div>
                        {<\/span><\/div>
                            errors<\/span>++<\/span>;<\/span><\/div>
                            console<\/span>.<\/span>info<\/span>(<\/span>'error count: '<\/span> +<\/span> errors<\/span> +<\/span> '::have strict tag but not match -> open='<\/span> +<\/span> open<\/span> +<\/span> ' and close='<\/span> +<\/span> tag_name<\/span>);<\/span><\/div>
 <\/div>
                            return<\/span>;<\/span><\/div>
                        }<\/span><\/div>
                    }<\/span><\/div>
                }<\/span><\/div>
 <\/div>
                parseBBCode<\/span>(<\/span>content<\/span>.<\/span>substring<\/span>(<\/span>tail<\/span> +<\/span> 1<\/span>));<\/span><\/div>
            }<\/span><\/div>
        }<\/span><\/div>
    }<\/span><\/div>