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https://github.com/kasmtech/KasmVNC.git
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Remove Firefox Alt workaround
The bug got fixed way back in Firefox 63, and it is also misbehaving with modern Firefox as they no longer consider AltGr an Alt-key.
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parent
33a113a475
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@ -29,7 +29,6 @@ export default class Keyboard {
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'keydown': this._handleKeyDown.bind(this),
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'keypress': this._handleKeyPress.bind(this),
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'blur': this._allKeysUp.bind(this),
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'checkalt': this._checkAlt.bind(this),
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};
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// ===== EVENT HANDLERS =====
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@ -312,30 +311,6 @@ export default class Keyboard {
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Log.Debug("<< Keyboard.allKeysUp");
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}
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// Alt workaround for Firefox on Windows, see below
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_checkAlt(e) {
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if (e.skipCheckAlt) {
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return;
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}
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if (e.altKey) {
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return;
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}
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const target = this._target;
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const downList = this._keyDownList;
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['AltLeft', 'AltRight'].forEach((code) => {
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if (!(code in downList)) {
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return;
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}
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const event = new KeyboardEvent('keyup',
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{ key: downList[code],
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code: code });
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event.skipCheckAlt = true;
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target.dispatchEvent(event);
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});
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}
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// ===== PUBLIC METHODS =====
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grab() {
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@ -348,33 +323,12 @@ export default class Keyboard {
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// Release (key up) if window loses focus
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window.addEventListener('blur', this._eventHandlers.blur);
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// Firefox on Windows has broken handling of Alt, so we need to
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// poll as best we can for releases (still doesn't prevent the
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// menu from popping up though as we can't call
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// preventDefault())
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if (browser.isWindows() && browser.isFirefox()) {
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const handler = this._eventHandlers.checkalt;
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['mousedown', 'mouseup', 'mousemove', 'wheel',
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'touchstart', 'touchend', 'touchmove',
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'keydown', 'keyup'].forEach(type =>
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document.addEventListener(type, handler,
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{ capture: true,
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passive: true }));
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}
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//Log.Debug("<< Keyboard.grab");
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}
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ungrab() {
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//Log.Debug(">> Keyboard.ungrab");
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if (browser.isWindows() && browser.isFirefox()) {
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const handler = this._eventHandlers.checkalt;
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['mousedown', 'mouseup', 'mousemove', 'wheel',
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'touchstart', 'touchend', 'touchmove',
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'keydown', 'keyup'].forEach(type => document.removeEventListener(type, handler));
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}
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this._target.removeEventListener('keydown', this._eventHandlers.keydown);
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this._target.removeEventListener('keyup', this._eventHandlers.keyup);
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this._target.removeEventListener('keypress', this._eventHandlers.keypress);
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