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public/vendor/pagedown/Markdown.Converter.js  view on Meta::CPAN

        function _RunSpanGamut(text) {
            //
            // These are all the transformations that occur *within* block-level
            // tags like paragraphs, headers, and list items.
            //

            text = pluginHooks.preSpanGamut(text);
            
            text = _DoCodeSpans(text);
            text = _EscapeSpecialCharsWithinTagAttributes(text);
            text = _EncodeBackslashEscapes(text);

            // Process anchor and image tags. Images must come first,
            // because ![foo][f] looks like an anchor.
            text = _DoImages(text);
            text = _DoAnchors(text);

            // Make links out of things like `<http://example.com/>`
            // Must come after _DoAnchors(), because you can use < and >
            // delimiters in inline links like [this](<url>).
            text = _DoAutoLinks(text);
            
            text = text.replace(/~P/g, "://"); // put in place to prevent autolinking; reset now
            
            text = _EncodeAmpsAndAngles(text);
            text = _DoItalicsAndBold(text);

            // Do hard breaks:
            text = text.replace(/  +\n/g, " <br>\n");
            
            text = pluginHooks.postSpanGamut(text);

            return text;
        }

        function _EscapeSpecialCharsWithinTagAttributes(text) {
            //
            // Within tags -- meaning between < and > -- encode [\ ` * _] so they
            // don't conflict with their use in Markdown for code, italics and strong.
            //

            // Build a regex to find HTML tags and comments.  See Friedl's 
            // "Mastering Regular Expressions", 2nd Ed., pp. 200-201.

            // SE: changed the comment part of the regex

            var regex = /(<[a-z\/!$]("[^"]*"|'[^']*'|[^'">])*>|<!(--(?:|(?:[^>-]|-[^>])(?:[^-]|-[^-])*)--)>)/gi;

            text = text.replace(regex, function (wholeMatch) {
                var tag = wholeMatch.replace(/(.)<\/?code>(?=.)/g, "$1`");
                tag = escapeCharacters(tag, wholeMatch.charAt(1) == "!" ? "\\`*_/" : "\\`*_"); // also escape slashes in comments to prevent autolinking there -- http://meta.stackoverflow.com/questions/95987
                return tag;
            });

            return text;
        }

        function _DoAnchors(text) {
            //
            // Turn Markdown link shortcuts into XHTML <a> tags.
            //
            //
            // First, handle reference-style links: [link text] [id]
            //

            /*
            text = text.replace(/
                (                           // wrap whole match in $1
                    \[
                    (
                        (?:
                            \[[^\]]*\]      // allow brackets nested one level
                            |
                            [^\[]           // or anything else
                        )*
                    )
                    \]

                    [ ]?                    // one optional space
                    (?:\n[ ]*)?             // one optional newline followed by spaces

                    \[
                    (.*?)                   // id = $3
                    \]
                )
                ()()()()                    // pad remaining backreferences
            /g, writeAnchorTag);
            */
            text = text.replace(/(\[((?:\[[^\]]*\]|[^\[\]])*)\][ ]?(?:\n[ ]*)?\[(.*?)\])()()()()/g, writeAnchorTag);

            //
            // Next, inline-style links: [link text](url "optional title")
            //

            /*
            text = text.replace(/
                (                           // wrap whole match in $1
                    \[
                    (
                        (?:
                            \[[^\]]*\]      // allow brackets nested one level
                            |
                            [^\[\]]         // or anything else
                        )*
                    )
                    \]
                    \(                      // literal paren
                    [ \t]*
                    ()                      // no id, so leave $3 empty
                    <?(                     // href = $4
                        (?:
                            \([^)]*\)       // allow one level of (correctly nested) parens (think MSDN)
                            |
                            [^()\s]
                        )*?
                    )>?                
                    [ \t]*
                    (                       // $5
                        (['"])              // quote char = $6
                        (.*?)               // Title = $7