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attempt to clear stuck keys (#75) 

Fixes MacOS Stuck keys
Co-authored-by: matt <matt@kasmweb.com>
This commit is contained in:
Matt McClaskey 2023-08-16 11:03:18 -04:00 committed by GitHub
parent d135f05932
commit 2b7e3321ae
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 44 additions and 12 deletions
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54
core/input/keyboard.js
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@ -58,21 +58,52 @@ export default class Keyboard {
// ===== PRIVATE METHODS ===== // ===== PRIVATE METHODS =====
_clearKeysDown(event) {
// On some Operating systems, the browser will lose key up events when a shortcut key combination triggers something
// on the OS that is outside the scope of the browser. For example, MacOS Cmd+Shift+Ctrl+4 brings up a screen capture
// tool and the browser only recieves some of the key down events, but not the key up events. This leaves the server
// out of sync, with cetain keys stuck down. This attempts to discover and fix these occurances in a OS nuetral way
if (event) {
for (const [key, value] of Object.entries(this._keyDownList)) {
switch(key) {
case "ControlLeft":
case "ControlRight":
if (!event.ctrlKey) {
Log.Error("A control key is stuck down, sending up.");
this._sendKeyEvent(value, key, false);
}
break;
case "MetaLeft":
case "MetaRight":
if (!event.metaKey) {
Log.Error("A meta key is stuck down, sending up.");
this._sendKeyEvent(value, key, false);
}
break;
case "AltLeft":
case "AltRight":
if (!event.altKey) {
Log.Error("A alt key is stuck down, sending up. ");
this._sendKeyEvent(value, key, false);
}
break;
case "ShiftRight":
case "ShiftLeft":
if (!event.shiftKey) {
Log.Error("A shift key is stuck down, sending up.");
this._sendKeyEvent(value, key, false);
}
break;
}
}
}
}
_sendKeyEvent(keysym, code, down) { _sendKeyEvent(keysym, code, down) {
if (down) { if (down) {
this._keyDownList[code] = keysym; this._keyDownList[code] = keysym;
} else { } else {
// On MacOs zoom and shortcut actions are CMD based so we need to
// let the remote know that it should unselect the CTRL key instead
if (
browser.isMac() &&
this._keyDownList["ControlLeft"] &&
(code === "MetaLeft" || code === "MetaRight")
) {
keysym = KeyTable.XK_Control_L;
code = "ControlLeft";
}
// Do we really think this key is down? // Do we really think this key is down?
if (!(code in this._keyDownList)) { if (!(code in this._keyDownList)) {
return; return;
@ -238,6 +269,7 @@ export default class Keyboard {
_handleKeyDown(e) { _handleKeyDown(e) {
const code = this._getKeyCode(e); const code = this._getKeyCode(e);
let keysym = KeyboardUtil.getKeysym(e); let keysym = KeyboardUtil.getKeysym(e);
this._clearKeysDown(e);
if (this._isIMEInteraction(e)) { if (this._isIMEInteraction(e)) {
//skip event if IME related //skip event if IME related