98 lines
3.5 KiB
JavaScript
98 lines
3.5 KiB
JavaScript
/*
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* Copyright (C) 2021 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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/**
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* This class controls the registration of accessibility handlers.
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*/
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class AccessibilityController {
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/**
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* Creates a new instance.
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* @param {ScriptManager} scriptManager An instance of the `ScriptManager` class.
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*/
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constructor(scriptManager) {
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this._scriptManager = scriptManager;
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this._updateGoogleDocsAccessibilityToken = null;
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this._updateGoogleDocsAccessibilityPromise = null;
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this._forceGoogleDocsHtmlRenderingAny = false;
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}
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/**
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* Updates the accessibility handlers.
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* @param {object} fullOptions The full options object from the `Backend` instance.
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* The value is treated as read-only and is not modified.
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*/
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async update(fullOptions) {
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let forceGoogleDocsHtmlRenderingAny = false;
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for (const {options} of fullOptions.profiles) {
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if (options.accessibility.forceGoogleDocsHtmlRendering) {
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forceGoogleDocsHtmlRenderingAny = true;
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break;
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}
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}
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await this._updateGoogleDocsAccessibility(forceGoogleDocsHtmlRenderingAny);
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}
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// Private
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async _updateGoogleDocsAccessibility(forceGoogleDocsHtmlRenderingAny) {
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// Reentrant token
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const token = {};
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this._updateGoogleDocsAccessibilityToken = token;
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// Wait for previous
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let promise = this._updateGoogleDocsAccessibilityPromise;
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if (promise !== null) { await promise; }
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// Reentrant check
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if (this._updateGoogleDocsAccessibilityToken !== token) { return; }
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// Update
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promise = this._updateGoogleDocsAccessibilityInner(forceGoogleDocsHtmlRenderingAny);
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this._updateGoogleDocsAccessibilityPromise = promise;
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await promise;
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this._updateGoogleDocsAccessibilityPromise = null;
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}
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async _updateGoogleDocsAccessibilityInner(forceGoogleDocsHtmlRenderingAny) {
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if (this._forceGoogleDocsHtmlRenderingAny === forceGoogleDocsHtmlRenderingAny) { return; }
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this._forceGoogleDocsHtmlRenderingAny = forceGoogleDocsHtmlRenderingAny;
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const id = 'googleDocsAccessibility';
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try {
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if (forceGoogleDocsHtmlRenderingAny) {
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if (await this._scriptManager.isContentScriptRegistered(id)) { return; }
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const details = {
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allFrames: true,
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matchAboutBlank: true,
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matches: ['*://docs.google.com/*'],
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urlMatches: '^[^:]*://docs.google.com/[\\w\\W]*$',
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runAt: 'document_start',
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js: ['js/accessibility/google-docs.js']
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};
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await this._scriptManager.registerContentScript(id, details);
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} else {
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await this._scriptManager.unregisterContentScript(id);
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}
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} catch (e) {
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log.error(e);
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}
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}
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}
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