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Avoid NullReferenceException in Gestures.PointerReleased #15117

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merged 5 commits into from
Apr 5, 2024
Merged

Avoid NullReferenceException in Gestures.PointerReleased #15117

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0c965be
refs #14249 Avoid NullReferenceException in Gestures.PointerReleased
zabolotnev Mar 25, 2024
adc04de
refs #14249 Track current gesture state with single readonly struct
zabolotnev Mar 26, 2024
399235e
Update from review
zabolotnev Mar 26, 2024
ebc9c23
Merge branch 'master' into fix/NRE_in_Gestures_PointerReleased
zabolotnev Mar 26, 2024
b44b66d
Moved the last click location from the GestureState record to a separ…
zabolotnev Mar 29, 2024
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10 changes: 6 additions & 4 deletions src/Avalonia.Base/Input/Gestures.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -67,6 +67,7 @@ public static class Gestures

private static readonly WeakReference<object?> s_lastPress = new WeakReference<object?>(null);
private static Point s_lastPressPoint;
private static PointerType s_lastHeldPointerType;
private static IPointer? s_lastHeldPointer;

public static readonly RoutedEvent<PinchEventArgs> PinchEvent =
Expand Down Expand Up @@ -229,7 +230,7 @@ private static void PointerPressed(RoutedEventArgs ev)
{
if(s_isHolding && ev.Source is Interactive i)
{
i.RaiseEvent(new HoldingRoutedEventArgs(HoldingState.Cancelled, s_lastPressPoint, s_lastHeldPointer.Type, e));
i.RaiseEvent(new HoldingRoutedEventArgs(HoldingState.Cancelled, s_lastPressPoint, s_lastHeldPointerType, e));
}
s_holdCancellationToken?.Cancel();
s_holdCancellationToken?.Dispose();
Expand All @@ -244,6 +245,7 @@ private static void PointerPressed(RoutedEventArgs ev)
{
s_isDoubleTapped = false;
s_lastPress.SetTarget(ev.Source);
s_lastHeldPointerType = e.Pointer.Type;
s_lastHeldPointer = e.Pointer;
s_lastPressPoint = e.GetPosition((Visual)ev.Source);
s_holdCancellationToken = new CancellationTokenSource();
Expand All @@ -257,7 +259,7 @@ private static void PointerPressed(RoutedEventArgs ev)
if (!token.IsCancellationRequested && e.Source is InputElement i && GetIsHoldingEnabled(i) && (e.Pointer.Type != PointerType.Mouse || GetIsHoldWithMouseEnabled(i)))
{
s_isHolding = true;
i.RaiseEvent(new HoldingRoutedEventArgs(HoldingState.Started, s_lastPressPoint, s_lastHeldPointer.Type, e));
i.RaiseEvent(new HoldingRoutedEventArgs(HoldingState.Started, s_lastPressPoint, s_lastHeldPointerType, e));
}
}, settings.HoldWaitDuration);
}
Expand Down Expand Up @@ -297,7 +299,7 @@ e.InitialPressMouseButton is MouseButton.Left or MouseButton.Right &&
if (s_isHolding)
{
s_isHolding = false;
i.RaiseEvent(new HoldingRoutedEventArgs(HoldingState.Completed, s_lastPressPoint, s_lastHeldPointer!.Type, e));
i.RaiseEvent(new HoldingRoutedEventArgs(HoldingState.Completed, s_lastPressPoint, s_lastHeldPointerType, e));
}
else if (e.InitialPressMouseButton == MouseButton.Right)
{
Expand Down Expand Up @@ -341,7 +343,7 @@ private static void PointerMoved(RoutedEventArgs ev)

if (s_isHolding)
{
i.RaiseEvent(new HoldingRoutedEventArgs(HoldingState.Cancelled, s_lastPressPoint, s_lastHeldPointer!.Type, e));
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i.RaiseEvent(new HoldingRoutedEventArgs(HoldingState.Cancelled, s_lastPressPoint, s_lastHeldPointerType, e));
s_lastHeldPointer = null;
}
}
Expand Down
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