yomichan/ext/sb/js/sandbox.js

/*
 * Copyright (c) 2017 Alex Yatskov <alex@foosoft.net>
 * Author: Alex Yatskov <alex@foosoft.net>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */


window.addEventListener('message', event => {
    if (event.data.command === 'render') {
        window.yomichan_cache = window.yomichan_cache || {};

        let template = window.yomichan_cache[event.data.template];
        if (!template) {
            template = Handlebars.compile(event.data.template || '');
            window.yomichan_cache[event.data.template] = template;
        }

        let result = null;
        let command = null;
        try {
            command = 'render';
            result = template(event.data.data || {});
        } catch (e) {
            command = 'error';
            result = e;
        }

        event.source.postMessage({result, command, sequence: event.data.sequence}, '*');
    }
});