/
anchors.js
98 lines (81 loc) · 3.51 KB
/
anchors.js
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/**
* 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, '"');
//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 += ' 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 = ' target="¨E95Eblank"';
}
return st + '<a href="' + lnk + '"' + target + '>' + mentions + '</a>';
});
}
text = globals.converter._dispatch('anchors.after', text, options, globals);
return text;
});