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Post firstDrawCallback to avoid a deadlock if the widget is resized in that callback. #1486

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Aug 2, 2019
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Post firstDrawCallback to avoid a deadlock if the widget is resized in that callback. #1486

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5 changes: 4 additions & 1 deletion app/src/common/shared/org/mozilla/vrbrowser/ui/widgets/WindowWidget.java
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Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,7 @@
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputConnection;

import org.mozilla.gecko.util.ThreadUtils;
import org.mozilla.geckoview.AllowOrDeny;
import org.mozilla.geckoview.GeckoDisplay;
import org.mozilla.geckoview.GeckoResult;
Expand Down Expand Up @@ -782,7 +783,9 @@ public void onCrash(GeckoSession session) {
@Override
public void onFirstComposite(GeckoSession session) {
if (mFirstDrawCallback != null) {
mFirstDrawCallback.run();
// Post this call because running it synchronously can cause a deadlock if the runnable
// resizes the widget and calls surfaceChanged. See https://github.com/MozillaReality/FirefoxReality/issues/1459.
ThreadUtils.postToUiThread(mFirstDrawCallback);
mFirstDrawCallback = null;
}
}
Expand Down