83 lines
2.7 KiB
JavaScript
83 lines
2.7 KiB
JavaScript
/*
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* Copyright (C) 2020 Yomichan Authors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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const dynamicLoader = (() => {
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function loadStyles(urls) {
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const parent = document.head;
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for (const url of urls) {
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const node = parent.querySelector(`link[href='${escapeCSSAttribute(url)}']`);
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if (node !== null) { continue; }
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const style = document.createElement('link');
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style.rel = 'stylesheet';
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style.type = 'text/css';
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style.href = url;
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parent.appendChild(style);
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}
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}
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function loadScripts(urls) {
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return new Promise((resolve) => {
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const parent = document.body;
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for (const url of urls) {
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const node = parent.querySelector(`script[src='${escapeCSSAttribute(url)}']`);
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if (node !== null) { continue; }
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const script = document.createElement('script');
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script.async = false;
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script.src = url;
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parent.appendChild(script);
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}
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loadScriptSentinel(resolve);
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});
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}
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function loadScriptSentinel(resolve, reject) {
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const parent = document.body;
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const script = document.createElement('script');
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const sentinelEventName = 'dynamicLoaderSentinel';
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const sentinelEventCallback = (e) => {
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if (e.script !== script) { return; }
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yomichan.off(sentinelEventName, sentinelEventCallback);
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parent.removeChild(script);
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resolve();
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};
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yomichan.on(sentinelEventName, sentinelEventCallback);
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try {
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script.async = false;
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script.src = '/mixed/js/dynamic-loader-sentinel.js';
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parent.appendChild(script);
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} catch (e) {
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yomichan.off(sentinelEventName, sentinelEventCallback);
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reject(e);
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}
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}
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function escapeCSSAttribute(value) {
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return value.replace(/['\\]/g, (character) => `\\${character}`);
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}
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return {
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loadStyles,
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loadScripts
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};
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})();
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