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- (function () {
- if (typeof Prism === 'undefined') {
- return;
- }
- var url = /\b([a-z]{3,7}:\/\/|tel:)[\w\-+%~/.:=&!$'()*,;@]+(?:\?[\w\-+%~/.:=?&!$'()*,;@]*)?(?:#[\w\-+%~/.:#=?&!$'()*,;@]*)?/;
- var email = /\b\S+@[\w.]+[a-z]{2}/;
- var linkMd = /\[([^\]]+)\]\(([^)]+)\)/;
- // Tokens that may contain URLs and emails
- var candidates = ['comment', 'url', 'attr-value', 'string'];
- Prism.plugins.autolinker = {
- processGrammar: function (grammar) {
- // Abort if grammar has already been processed
- if (!grammar || grammar['url-link']) {
- return;
- }
- Prism.languages.DFS(grammar, function (key, def, type) {
- if (candidates.indexOf(type) > -1 && !Array.isArray(def)) {
- if (!def.pattern) {
- def = this[key] = {
- pattern: def
- };
- }
- def.inside = def.inside || {};
- if (type == 'comment') {
- def.inside['md-link'] = linkMd;
- }
- if (type == 'attr-value') {
- Prism.languages.insertBefore('inside', 'punctuation', { 'url-link': url }, def);
- } else {
- def.inside['url-link'] = url;
- }
- def.inside['email-link'] = email;
- }
- });
- grammar['url-link'] = url;
- grammar['email-link'] = email;
- }
- };
- Prism.hooks.add('before-highlight', function (env) {
- Prism.plugins.autolinker.processGrammar(env.grammar);
- });
- Prism.hooks.add('wrap', function (env) {
- if (/-link$/.test(env.type)) {
- env.tag = 'a';
- var href = env.content;
- if (env.type == 'email-link' && href.indexOf('mailto:') != 0) {
- href = 'mailto:' + href;
- } else if (env.type == 'md-link') {
- // Markdown
- var match = env.content.match(linkMd);
- href = match[2];
- env.content = match[1];
- }
- env.attributes.href = href;
- // Silently catch any error thrown by decodeURIComponent (#1186)
- try {
- env.content = decodeURIComponent(env.content);
- } catch (e) { /* noop */ }
- }
- });
- }());
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