source: node_modules/prismjs/plugins/autolinker/prism-autolinker.js@ 65b6638

(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 */ }
                }
        });

}());