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Avoid recursion in Alt check on Firefox

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The Firefox workaround which checks for missing Alt key events may
synthesise new KeyboardEvents. On these events, checkAlt should not be
recursively triggered. Otherwise, we get "too much recursion" errors
whenever the Alt key is pressed.
This commit is contained in:
Jesper Alf Dam 2019-08-16 14:27:12 +02:00 committed by Lauri Kasanen
parent 5b73c1ca23
commit d4747a8c80
1 changed files with 4 additions and 0 deletions
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4
kasmweb/core/input/keyboard.js
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@ -301,6 +301,9 @@ export default class Keyboard {
// Firefox Alt workaround, see below
_checkAlt(e) {
if (e.skipCheckAlt) {
return;
}
if (e.altKey) {
return;
}
@ -315,6 +318,7 @@ export default class Keyboard {
const event = new KeyboardEvent('keyup',
{ key: downList[code],
code: code });
event.skipCheckAlt = true;
target.dispatchEvent(event);
});
}