yomichan/ext/js/script/dynamic-loader.js

167 lines
5.5 KiB
JavaScript
Raw Normal View History

/*
* Copyright (C) 2020-2021 Yomichan Authors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
const dynamicLoader = (() => {
const injectedStylesheets = new Map();
const injectedStylesheetsWithParent = new WeakMap();
function getInjectedStylesheet(id, parentNode) {
if (parentNode === null) {
return injectedStylesheets.get(id);
}
const map = injectedStylesheetsWithParent.get(parentNode);
return typeof map !== 'undefined' ? map.get(id) : void 0;
}
function setInjectedStylesheet(id, parentNode, value) {
if (parentNode === null) {
injectedStylesheets.set(id, value);
return;
}
let map = injectedStylesheetsWithParent.get(parentNode);
if (typeof map === 'undefined') {
map = new Map();
injectedStylesheetsWithParent.set(parentNode, map);
}
map.set(id, value);
}
async function loadStyle(id, type, value, useWebExtensionApi=false, parentNode=null) {
if (useWebExtensionApi && yomichan.isExtensionUrl(window.location.href)) {
// Permissions error will occur if trying to use the WebExtension API to inject into an extension page
useWebExtensionApi = false;
}
let styleNode = getInjectedStylesheet(id, parentNode);
if (typeof styleNode !== 'undefined') {
if (styleNode === null) {
// Previously injected via WebExtension API
throw new Error(`Stylesheet with id ${id} has already been injected using the WebExtension API`);
}
} else {
styleNode = null;
}
if (type === 'file-content') {
value = await yomichan.api.getStylesheetContent(value);
type = 'code';
useWebExtensionApi = false;
}
if (useWebExtensionApi) {
// Inject via WebExtension API
if (styleNode !== null && styleNode.parentNode !== null) {
styleNode.parentNode.removeChild(styleNode);
}
setInjectedStylesheet(id, parentNode, null);
await yomichan.api.injectStylesheet(type, value);
return null;
}
// Create node in document
let parentNode2 = parentNode;
if (parentNode2 === null) {
parentNode2 = document.head;
if (parentNode2 === null) {
throw new Error('No parent node');
}
}
// Create or reuse node
const isFile = (type === 'file');
const tagName = isFile ? 'link' : 'style';
if (styleNode === null || styleNode.nodeName.toLowerCase() !== tagName) {
if (styleNode !== null && styleNode.parentNode !== null) {
styleNode.parentNode.removeChild(styleNode);
}
styleNode = document.createElement(tagName);
}
// Update node style
if (isFile) {
styleNode.rel = 'stylesheet';
styleNode.href = value;
} else {
styleNode.textContent = value;
}
// Update parent
if (styleNode.parentNode !== parentNode2) {
parentNode2.appendChild(styleNode);
}
// Add to map
setInjectedStylesheet(id, parentNode, styleNode);
return styleNode;
}
function loadScripts(urls) {
return new Promise((resolve, reject) => {
const parent = document.body;
if (parent === null) {
reject(new Error('Missing body'));
return;
}
for (const url of urls) {
const node = parent.querySelector(`script[src='${escapeCSSAttribute(url)}']`);
if (node !== null) { continue; }
const script = document.createElement('script');
script.async = false;
script.src = url;
parent.appendChild(script);
}
loadScriptSentinel(parent, resolve, reject);
});
}
function loadScriptSentinel(parent, resolve, reject) {
const script = document.createElement('script');
const sentinelEventName = 'dynamicLoaderSentinel';
const sentinelEventCallback = (e) => {
if (e.script !== script) { return; }
yomichan.off(sentinelEventName, sentinelEventCallback);
2020-04-22 21:48:42 +00:00
parent.removeChild(script);
resolve();
};
yomichan.on(sentinelEventName, sentinelEventCallback);
try {
script.async = false;
Move mixed/js (#1383) * Move mixed/js/core.js to js/core.js * Move mixed/js/yomichan.js to js/yomichan.js * Move mixed/js/timer.js to js/debug/timer.js * Move mixed/js/hotkey-handler.js to js/input/hotkey-handler.js * Move mixed/js/hotkey-help-controller.js to js/input/hotkey-help-controller.js * Move mixed/js/hotkey-util.js to js/input/hotkey-util.js * Move mixed/js/audio-system.js to js/input/audio-system.js * Move mixed/js/media-loader.js to js/input/media-loader.js * Move mixed/js/text-to-speech-audio.js to js/input/text-to-speech-audio.js * Move mixed/js/comm.js to js/comm/cross-frame-api.js * Move mixed/js/api.js to js/comm/api.js * Move mixed/js/frame-client.js to js/comm/frame-client.js * Move mixed/js/frame-endpoint.js to js/comm/frame-endpoint.js * Move mixed/js/display.js to js/display/display.js * Move mixed/js/display-audio.js to js/display/display-audio.js * Move mixed/js/display-generator.js to js/display/display-generator.js * Move mixed/js/display-history.js to js/display/display-history.js * Move mixed/js/display-notification.js to js/display/display-notification.js * Move mixed/js/display-profile-selection.js to js/display/display-profile-selection.js * Move mixed/js/japanese.js to js/language/japanese-util.js * Move mixed/js/dictionary-data-util.js to js/language/dictionary-data-util.js * Move mixed/js/document-focus-controller.js to js/dom/document-focus-controller.js * Move mixed/js/document-util.js to js/dom/document-util.js * Move mixed/js/dom-data-binder.js to js/dom/dom-data-binder.js * Move mixed/js/html-template-collection.js to js/dom/html-template-collection.js * Move mixed/js/panel-element.js to js/dom/panel-element.js * Move mixed/js/popup-menu.js to js/dom/popup-menu.js * Move mixed/js/selector-observer.js to js/dom/selector-observer.js * Move mixed/js/scroll.js to js/dom/window-scroll.js * Move mixed/js/text-scanner.js to js/language/text-scanner.js * Move mixed/js/cache-map.js to js/general/cache-map.js * Move mixed/js/object-property-accessor.js to js/general/object-property-accessor.js * Move mixed/js/task-accumulator.js to js/general/task-accumulator.js * Move mixed/js/environment.js to js/background/environment.js * Move mixed/js/dynamic-loader.js to js/scripting/dynamic-loader.js * Move mixed/js/dynamic-loader-sentinel.js to js/scripting/dynamic-loader-sentinel.js
2021-02-14 03:52:28 +00:00
script.src = '/js/script/dynamic-loader-sentinel.js';
2020-04-22 21:48:42 +00:00
parent.appendChild(script);
} catch (e) {
yomichan.off(sentinelEventName, sentinelEventCallback);
reject(e);
}
}
function escapeCSSAttribute(value) {
return value.replace(/['\\]/g, (character) => `\\${character}`);
}
return {
loadStyle,
loadScripts
};
})();