Add markdown format support (#25)

Co-authored-by: Dawid Dziurla <dawidd0811@gmail.com>
2026-08-31 20:02:08 -04:00 · 2020-11-30 12:51:34 -05:00
parent d1b07d9ed7
commit 2095e6ffe3
941 changed files with 37481 additions and 15 deletions
@@ -0,0 +1,98 @@
+/**
+ * Turn Markdown link shortcuts into XHTML <a> tags.
+ */
+showdown.subParser('anchors', function (text, options, globals) {
+  'use strict';
+
+  text = globals.converter._dispatch('anchors.before', text, options, globals);
+
+  var writeAnchorTag = function (wholeMatch, linkText, linkId, url, m5, m6, title) {
+    if (showdown.helper.isUndefined(title)) {
+      title = '';
+    }
+    linkId = linkId.toLowerCase();
+
+    // Special case for explicit empty url
+    if (wholeMatch.search(/\(<?\s*>? ?(['"].*['"])?\)$/m) > -1) {
+      url = '';
+    } else if (!url) {
+      if (!linkId) {
+        // lower-case and turn embedded newlines into spaces
+        linkId = linkText.toLowerCase().replace(/ ?\n/g, ' ');
+      }
+      url = '#' + linkId;
+
+      if (!showdown.helper.isUndefined(globals.gUrls[linkId])) {
+        url = globals.gUrls[linkId];
+        if (!showdown.helper.isUndefined(globals.gTitles[linkId])) {
+          title = globals.gTitles[linkId];
+        }
+      } else {
+        return wholeMatch;
+      }
+    }
+
+    //url = showdown.helper.escapeCharacters(url, '*_', false); // replaced line to improve performance
+    url = url.replace(showdown.helper.regexes.asteriskDashAndColon, showdown.helper.escapeCharactersCallback);
+
+    var result = '<a href="' + url + '"';
+
+    if (title !== '' && title !== null) {
+      title = title.replace(/"/g, '&quot;');
+      //title = showdown.helper.escapeCharacters(title, '*_', false); // replaced line to improve performance
+      title = title.replace(showdown.helper.regexes.asteriskDashAndColon, showdown.helper.escapeCharactersCallback);
+      result += ' title="' + title + '"';
+    }
+
+    // optionLinksInNewWindow only applies
+    // to external links. Hash links (#) open in same page
+    if (options.openLinksInNewWindow && !/^#/.test(url)) {
+      // escaped _
+      result += ' rel="noopener noreferrer" target="¨E95Eblank"';
+    }
+
+    result += '>' + linkText + '</a>';
+
+    return result;
+  };
+
+  // First, handle reference-style links: [link text] [id]
+  text = text.replace(/\[((?:\[[^\]]*]|[^\[\]])*)] ?(?:\n *)?\[(.*?)]()()()()/g, writeAnchorTag);
+
+  // Next, inline-style links: [link text](url "optional title")
+  // cases with crazy urls like ./image/cat1).png
+  text = text.replace(/\[((?:\[[^\]]*]|[^\[\]])*)]()[ \t]*\([ \t]?<([^>]*)>(?:[ \t]*((["'])([^"]*?)\5))?[ \t]?\)/g,
+    writeAnchorTag);
+
+  // normal cases
+  text = text.replace(/\[((?:\[[^\]]*]|[^\[\]])*)]()[ \t]*\([ \t]?<?([\S]+?(?:\([\S]*?\)[\S]*?)?)>?(?:[ \t]*((["'])([^"]*?)\5))?[ \t]?\)/g,
+    writeAnchorTag);
+
+  // handle reference-style shortcuts: [link text]
+  // These must come last in case you've also got [link test][1]
+  // or [link test](/foo)
+  text = text.replace(/\[([^\[\]]+)]()()()()()/g, writeAnchorTag);
+
+  // Lastly handle GithubMentions if option is enabled
+  if (options.ghMentions) {
+    text = text.replace(/(^|\s)(\\)?(@([a-z\d]+(?:[a-z\d.-]+?[a-z\d]+)*))/gmi, function (wm, st, escape, mentions, username) {
+      if (escape === '\\') {
+        return st + mentions;
+      }
+
+      //check if options.ghMentionsLink is a string
+      if (!showdown.helper.isString(options.ghMentionsLink)) {
+        throw new Error('ghMentionsLink option must be a string');
+      }
+      var lnk = options.ghMentionsLink.replace(/\{u}/g, username),
+          target = '';
+      if (options.openLinksInNewWindow) {
+        target = ' rel="noopener noreferrer" target="¨E95Eblank"';
+      }
+      return st + '<a href="' + lnk + '"' + target + '>' + mentions + '</a>';
+    });
+  }
+
+  text = globals.converter._dispatch('anchors.after', text, options, globals);
+  return text;
+});