104 lines
2.7 KiB
JavaScript
104 lines
2.7 KiB
JavaScript
/*
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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'use strict';
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(function() {
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if (window.handleAccelKeyLoaded)
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return;
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function stringifySoloModifier(event) {
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switch (event.key) {
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case 'Alt':
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return (
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!event.ctrlKey &&
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!event.metaKey
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) ? 'alt' : null;
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case 'Control':
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return (
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!event.altKey &&
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!event.metaKey
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) ? 'control' : null;
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case 'Meta':
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return (
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!event.altKey &&
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!event.ctrlKey
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) ? 'meta' : null;
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default:
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return null;
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}
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}
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function stringifyModifier(event) {
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if (event.altKey &&
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!event.ctrlKey &&
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!event.metaKey)
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return 'alt';
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if (!event.altKey &&
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event.ctrlKey &&
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!event.metaKey)
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return 'control';
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if (!event.altKey &&
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!event.ctrlKey &&
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event.metaKey)
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return 'meta';
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return null;
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}
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function stringifyUnshiftedSoloModifier(event) {
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if (event.key != 'Shift')
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return null;
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return stringifyModifier(event);
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}
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function stringifyMayTabSwitchModifier(event) {
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if (!/^(Tab|Shift|PageUp|PageDown)$/.test(event.key))
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return null;
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return stringifyModifier(event);
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}
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function onKeyDown(event) {
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const modifier = stringifySoloModifier(event);
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const mayTabSwitchModifier = stringifyMayTabSwitchModifier(event);
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if (modifier ||
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mayTabSwitchModifier)
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browser.runtime.sendMessage({
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type: 'ws:notify-may-start-tab-switch',
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modifier: modifier || mayTabSwitchModifier
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});
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}
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function onKeyUp(event) {
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const modifier = stringifySoloModifier(event);
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const unshiftedModifier = stringifyUnshiftedSoloModifier(event);
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const mayTabSwitchModifier = stringifyMayTabSwitchModifier(event);
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if (modifier ||
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(!unshiftedModifier &&
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!mayTabSwitchModifier))
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browser.runtime.sendMessage({
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type: 'ws:notify-may-end-tab-switch',
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modifier: modifier || stringifyModifier(event)
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});
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}
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function init() {
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window.handleAccelKeyLoaded = true;
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window.addEventListener('keydown', onKeyDown, { capture: true });
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window.addEventListener('keyup', onKeyUp, { capture: true });
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window.addEventListener('pagehide', () => {
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window.addEventListener('keydown', onKeyDown, { capture: true });
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window.addEventListener('keyup', onKeyUp, { capture: true });
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window.addEventListener('pageshow', init, { once: true });
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}, { once: true });
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}
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init();
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})();
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