perf(wasm): Split methods containing try/catch/finally blocks

Related to dotnet/runtime#111281

(cherry picked from commit f6108bb)

src/Uno.UI.Dispatching/Native/NativeDispatcher.cs

@@ -120,32 +120,42 @@ private static void DispatchItems()
 				}
 			}
 
+			RunAction(@this, action);
+
+			// Restore the priority to the default for native events
+			// (i.e. not dispatched by this running loop)
+			@this._currentPriority = NativeDispatcherPriority.Normal;
+
+			if (!didEnqueue && @this.Rendering != null)
+			{
+				@this.DispatchWakeUp();
+			}
+		}
+
+		/// <remarks>
+		/// This method runs in a separate method in order to workaround for the following issue:
+		/// https://github.com/dotnet/runtime/issues/111281
+		/// which prevents AOT on WebAssembly when try/catch/finally are found in the same method.
+		/// </remarks>
+		private static void RunAction(NativeDispatcher dispatcher, Action? action)
+		{
 			if (action != null)
 			{
 				try
 				{
-					using (@this._synchronizationContexts[(int)@this._currentPriority].Apply())
+					using (dispatcher._synchronizationContexts[(int)dispatcher._currentPriority].Apply())
 					{
 						action();
 					}
 				}
 				catch (Exception exception)
 				{
-					@this.Log().Error("NativeDispatcher unhandled exception", exception);
+					dispatcher.Log().Error("NativeDispatcher unhandled exception", exception);
 				}
 			}
-			else if (@this.Rendering == null && @this.Log().IsEnabled(LogLevel.Debug))
-			{
-				@this.Log().Error("Dispatch queue is empty.");
-			}
-
-			// Restore the priority to the default for native events
-			// (i.e. not dispatched by this running loop)
-			@this._currentPriority = NativeDispatcherPriority.Normal;
-
-			if (!didEnqueue && @this.Rendering != null)
+			else if (dispatcher.Rendering == null && dispatcher.Log().IsEnabled(LogLevel.Debug))
 			{
-				@this.DispatchWakeUp();
+				dispatcher.Log().Error("Dispatch queue is empty.");
 			}
 		}
 

src/Uno.UI/UI/Xaml/Controls/Frame/Frame.legacy.cs

@@ -140,20 +140,28 @@ private bool InnerNavigate(PageStackEntry entry, NavigationMode mode)
 
 		try
 		{
-			_isNavigating = true;
+			bool InternalNavigate(PageStackEntry entry, NavigationMode mode)
+			{
+				try
+				{
+					_isNavigating = true;
 
-			return InnerNavigateUnsafe(entry, mode);
-		}
-		catch (Exception exception)
-		{
-			NavigationFailed?.Invoke(this, new NavigationFailedEventArgs(entry.SourcePageType, exception));
+					return InnerNavigateUnsafe(entry, mode);
+				}
+				catch (Exception exception)
+				{
+					NavigationFailed?.Invoke(this, new NavigationFailedEventArgs(entry.SourcePageType, exception));
 
-			if (NavigationFailed == null)
-			{
-				Application.Current.RaiseRecoverableUnhandledException(new InvalidOperationException("Navigation failed", exception));
+					if (NavigationFailed == null)
+					{
+						Application.Current.RaiseRecoverableUnhandledException(new InvalidOperationException("Navigation failed", exception));
+					}
+
+					throw;
+				}
 			}
 
-			throw;
+			return InternalNavigate(entry, mode);
 		}
 		finally
 		{

src/Uno.UI/UI/Xaml/Internal/EventManager.uno.cs

@@ -129,15 +129,26 @@ public void RaiseSizeChangedEvents()
 				//if (auto layoutStorage = item.m_pElement->GetLayoutStorage())
 				{
 					var args = new SizeChangedEventArgs(item.Element, item.OldSize, item.Element.RenderSize);
-					// AddRef for args is done on the managed side
-					try
-					{
-						item.Element.RaiseSizeChanged(args);
-					}
-					catch
+
+					/// <remarks>
+					/// This method runs in a separate method in order to workaround for the following issue:
+					/// https://github.com/dotnet/runtime/issues/111281
+					/// which prevents AOT on WebAssembly when try/catch/finally are found in the same method.
+					/// </remarks>
+					static void RaiseItemSizeChanged(SizeChangedQueueItem item, SizeChangedEventArgs args)
 					{
-						// Empty catch to have the same behavior as "IGNOREHR" in WinUI.
+						// AddRef for args is done on the managed side
+						try
+						{
+							item.Element.RaiseSizeChanged(args);
+						}
+						catch
+						{
+							// Empty catch to have the same behavior as "IGNOREHR" in WinUI.
+						}
 					}
+
+					RaiseItemSizeChanged(item, args);
 				}
 
 				//TraceIndividualSizeChangedEnd(UINT64(item.m_pElement));

src/Uno.UI/UI/Xaml/Style/Style.cs

@@ -129,44 +129,56 @@ internal void ApplyTo(DependencyObject o, DependencyPropertyValuePrecedences pre
 
 			try
 			{
-				ResourceResolver.PushNewScope(_xamlScope);
-				localPrecedenceDisposable = DependencyObjectExtensions.OverrideLocalPrecedence(o, precedence);
-
-				if (_flattenedSetters != null)
+				/// <remarks>
+				/// This method runs in a separate method in order to workaround for the following issue:
+				/// https://github.com/dotnet/runtime/issues/111281
+				/// which prevents AOT on WebAssembly when try/catch/finally are found in the same method.
+				/// </remarks>
+				IDisposable? InnerApplyTo(DependencyObject o, DependencyPropertyValuePrecedences precedence)
 				{
-					for (var i = 0; i < _flattenedSetters.Length; i++)
+					IDisposable? localPrecedenceDisposable;
+					ResourceResolver.PushNewScope(_xamlScope);
+					localPrecedenceDisposable = DependencyObjectExtensions.OverrideLocalPrecedence(o, precedence);
+
+					if (_flattenedSetters != null)
 					{
-						try
+						for (var i = 0; i < _flattenedSetters.Length; i++)
 						{
-							if (TryGetAdjustedSetter(precedence, o, _flattenedSetters[i], out var adjustedSetter))
+							try
 							{
-								using (o.OverrideLocalPrecedence(DependencyPropertyValuePrecedences.ExplicitStyle))
+								if (TryGetAdjustedSetter(precedence, o, _flattenedSetters[i], out var adjustedSetter))
 								{
-									adjustedSetter.ApplyTo(o);
+									using (o.OverrideLocalPrecedence(DependencyPropertyValuePrecedences.ExplicitStyle))
+									{
+										adjustedSetter.ApplyTo(o);
+									}
+								}
+								else
+								{
+									_flattenedSetters[i].ApplyTo(o);
 								}
 							}
-							else
-							{
-								_flattenedSetters[i].ApplyTo(o);
-							}
-						}
-						catch (Exception ex)
-						{
-							// This empty catch is to keep parity with WinUI's IGNOREHR in
-							// https://github.com/microsoft/microsoft-ui-xaml/blob/93742a178db8f625ba9299f62c21f656e0b195ad/dxaml/xcp/core/core/elements/framework.cpp#L790
-							if (this.Log().IsEnabled(LogLevel.Debug))
+							catch (Exception ex)
 							{
-								this.Log().LogDebug($"An exception occurred while applying style setter. {ex}");
+								// This empty catch is to keep parity with WinUI's IGNOREHR in
+								// https://github.com/microsoft/microsoft-ui-xaml/blob/93742a178db8f625ba9299f62c21f656e0b195ad/dxaml/xcp/core/core/elements/framework.cpp#L790
+								if (this.Log().IsEnabled(LogLevel.Debug))
+								{
+									this.Log().LogDebug($"An exception occurred while applying style setter. {ex}");
+								}
 							}
 						}
 					}
-				}
 
-				localPrecedenceDisposable?.Dispose();
-				localPrecedenceDisposable = null;
+					localPrecedenceDisposable?.Dispose();
+					localPrecedenceDisposable = null;
+
+					// Check tree for resource binding values, since some Setters may have set ThemeResource-backed values
+					(o as IDependencyObjectStoreProvider)!.Store.UpdateResourceBindings(ResourceUpdateReason.ResolvedOnLoading);
+					return localPrecedenceDisposable;
+				}
 
-				// Check tree for resource binding values, since some Setters may have set ThemeResource-backed values
-				(o as IDependencyObjectStoreProvider)!.Store.UpdateResourceBindings(ResourceUpdateReason.ResolvedOnLoading);
+				localPrecedenceDisposable = InnerApplyTo(o, precedence);
 			}
 			finally
 			{

src/Uno.UI/UI/Xaml/UIElement.Pointers.cs

@@ -1225,20 +1225,38 @@ private bool RaisePointerEvent(RoutedEvent evt, PointerRoutedEventArgs args, Bub
 			}
 
 			var originalPending = _pendingRaisedEvent;
-			try
-			{
-				_pendingRaisedEvent = (this, evt, args);
 
-				return RaiseEvent(evt, args, ctx);
-			}
-			catch (Exception e)
+			try
 			{
-				if (this.Log().IsEnabled(LogLevel.Error))
+				/// <remarks>
+				/// This method runs in a separate method in order to workaround for the following issue:
+				/// https://github.com/dotnet/runtime/issues/111281
+				/// which prevents AOT on WebAssembly when try/catch/finally are found in the same method.
+				/// </remarks>
+				bool InnerRaiseEvent(
+					RoutedEvent evt,
+					PointerRoutedEventArgs args,
+					BubblingContext ctx,
+					ref (UIElement sender, RoutedEvent @event, PointerRoutedEventArgs args) pendingRaisedEvent)
 				{
-					this.Log().Error($"Failed to raise '{evt.Name}': {e}");
+					try
+					{
+						_pendingRaisedEvent = (this, evt, args);
+
+						return RaiseEvent(evt, args, ctx);
+					}
+					catch (Exception e)
+					{
+						if (this.Log().IsEnabled(LogLevel.Error))
+						{
+							this.Log().Error($"Failed to raise '{evt.Name}': {e}");
+						}
+
+						return false;
+					}
 				}
 
-				return false;
+				return InnerRaiseEvent(evt, args, ctx, ref _pendingRaisedEvent);
 			}
 			finally
 			{