114 lines
2.9 KiB
JavaScript
114 lines
2.9 KiB
JavaScript
/*
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***** BEGIN LICENSE BLOCK *****
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Copyright © 2009-2023 Center for History and New Media
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George Mason University, Fairfax, Virginia, USA
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http://zotero.org
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This file is part of Zotero.
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Zotero is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero 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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Zotero 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 Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with Zotero. If not, see <http://www.gnu.org/licenses/>.
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***** END LICENSE BLOCK *****
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*/
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(() => {
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if (Zotero.isMac) {
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return;
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}
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const WAIT_ALT_KEY = 100;
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let menuBar;
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let isMenuActive = false;
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let accessKeysHidden = false;
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let altPressTime = 0;
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if (document.readyState === "complete") {
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init();
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}
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else {
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document.addEventListener('DOMContentLoaded', init);
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}
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function init(event) {
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if (event.target !== document) return;
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setAccessKeysHidden(true);
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menuBar = document.querySelector("#main-menubar");
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// Submenu accessKey is not loaded until popupshowing event
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menuBar.addEventListener("popupshowing", () => {
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if (accessKeysHidden) {
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setAccessKeysHidden(true);
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}
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});
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window.addEventListener("keyup", (e) => {
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if (e.key === "Alt") {
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altPressTime = new Date().getTime();
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}
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});
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observeMenuActive(menuBar);
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}
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async function setAccessKeysHidden(hidden = false) {
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accessKeysHidden = hidden;
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if (!hidden) {
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document.querySelectorAll('label[cachedAccessKey]').forEach((label) => {
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label.accessKey = label.getAttribute("cachedAccessKey");
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});
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return;
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}
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document.querySelectorAll('*[accesskey]').forEach((e) => {
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const label = e.querySelector("label");
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if (!label?.accessKey) {
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return;
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}
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label.setAttribute('cachedAccessKey', label.accessKey);
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label.accessKey = "";
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});
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}
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function observeMenuActive() {
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let observer = new MutationObserver(async () => {
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if (menuBar.querySelector(":scope > menu[_moz-menuactive]")) {
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isMenuActive = true;
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// When alt key is pressed, show access key
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if (accessKeysHidden && (new Date().getTime() - altPressTime < WAIT_ALT_KEY)) {
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setAccessKeysHidden(false);
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}
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}
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else {
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isMenuActive = false;
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tryHideAccessKeys();
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}
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});
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menuBar.querySelectorAll(":scope > menu").forEach((menu) => {
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observer.observe(menu, { attributes: true, attributeFilter: ["_moz-menuactive"] });
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});
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window.addEventListener("unload", () => {
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observer.disconnect();
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});
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}
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async function tryHideAccessKeys() {
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await Zotero.Promise.delay(WAIT_ALT_KEY);
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if (isMenuActive || accessKeysHidden) {
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return;
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}
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setAccessKeysHidden(true);
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}
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})();
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