source: node_modules/prismjs/plugins/treeview/prism-treeview.js

(function () {

        if (typeof Prism === 'undefined') {
                return;
        }

        Prism.languages.treeview = {
                'treeview-part': {
                        pattern: /^.+/m,
                        inside: {
                                'entry-line': [
                                        {
                                                pattern: /\|-- |├── /,
                                                alias: 'line-h'
                                        },
                                        {
                                                pattern: /\| {3}|│ {3}/,
                                                alias: 'line-v'
                                        },
                                        {
                                                pattern: /`-- |└── /,
                                                alias: 'line-v-last'
                                        },
                                        {
                                                pattern: / {4}/,
                                                alias: 'line-v-gap'
                                        }
                                ],
                                'entry-name': {
                                        pattern: /.*\S.*/,
                                        inside: {
                                                // symlink
                                                'operator': / -> /,
                                        }
                                }
                        }
                }
        };

        Prism.hooks.add('wrap', function (env) {
                if (env.language === 'treeview' && env.type === 'entry-name') {
                        var classes = env.classes;

                        var folderPattern = /(^|[^\\])\/\s*$/;
                        if (folderPattern.test(env.content)) {
                                // folder

                                // remove trailing /
                                env.content = env.content.replace(folderPattern, '$1');
                                classes.push('dir');
                        } else {
                                // file

                                // remove trailing file marker
                                env.content = env.content.replace(/(^|[^\\])[=*|]\s*$/, '$1');

                                var parts = env.content.toLowerCase().replace(/\s+/g, '').split('.');
                                while (parts.length > 1) {
                                        parts.shift();
                                        // Ex. 'foo.min.js' would become '<span class="token keyword ext-min-js ext-js">foo.min.js</span>'
                                        classes.push('ext-' + parts.join('-'));
                                }
                        }

                        if (env.content[0] === '.') {
                                classes.push('dotfile');
                        }
                }
        });
}());