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try/catch guard for QEMU keyboard test 

Safari on older iOS doesn't support creating KeyboardEvent objects,
so put a guard in to avoid crashes.
This commit is contained in:
Pierre Ossman 2017-07-06 12:55:26 +02:00
parent 7cac5c8e9f
commit 2bf4cf5a20
1 changed files with 7 additions and 3 deletions
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4
core/rfb.js
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@ -2410,10 +2410,14 @@ RFB.encodingHandlers = {
QEMUExtendedKeyEvent: function () { QEMUExtendedKeyEvent: function () {
this._FBU.rects--; this._FBU.rects--;
// Old Safari doesn't support creating keyboard events
try {
var keyboardEvent = document.createEvent("keyboardEvent"); var keyboardEvent = document.createEvent("keyboardEvent");
if (keyboardEvent.code !== undefined) { if (keyboardEvent.code !== undefined) {
this._qemuExtKeyEventSupported = true; this._qemuExtKeyEventSupported = true;
} }
} catch (err) {
}
}, },
JPEG_quality_lo: function () { JPEG_quality_lo: function () {