WIP
This commit is contained in:
Dan Clark
+161
-156
@@ -13,190 +13,195 @@ public class FrameHandler(ITransientNavigationStore<Frame> navigationStore) :
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{
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public void Handle(NavigateTemplateEventArgs args)
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{
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if (args.Region is Frame frame)
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if (args.Region is not Frame frame)
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{
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frame.NavigationPageFactory ??= new NavigationPageFactory();
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if (args.Template is Control control)
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return;
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}
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if (args.Template is not Control control)
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{
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return;
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}
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frame.NavigationPageFactory ??= new NavigationPageFactory();
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void Navigated(Control sender)
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{
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void HandleNavigatedTo(object? _, NavigationEventArgs __)
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{
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void Navigated(Control sender)
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async void HandleNavigatingFrom(object? _, NavigatingCancelEventArgs args)
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{
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void HandleNavigatedTo(object? _, NavigationEventArgs __)
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sender.RemoveHandler(Frame.NavigatingFromEvent, HandleNavigatingFrom);
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control.Unloaded -= HandleUnloaded;
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void HandleNavigatedFrom(object? _, NavigationEventArgs args)
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{
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async void HandleNavigatingFrom(object? _, NavigatingCancelEventArgs args)
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{
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sender.RemoveHandler(Frame.NavigatingFromEvent, HandleNavigatingFrom);
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control.Unloaded -= HandleUnloaded;
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void HandleNavigatedFrom(object? _, NavigationEventArgs args)
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{
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sender.RemoveHandler(Frame.NavigatedFromEvent, HandleNavigatedFrom);
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if (sender.DataContext is object content)
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{
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if (content is IActivation activation)
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{
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activation.IsActive = false;
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}
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if (content is IDisposable disposable)
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{
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FrameNavigationOptions? options = navigationStore.Get<FrameNavigationOptions>(frame);
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if (options is not FrameNavigationOptions frameOptions ||
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!frameOptions.IsNavigationStackEnabled)
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{
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disposable.Dispose();
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}
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}
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}
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}
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sender.AddHandler(Frame.NavigatedFromEvent, HandleNavigatedFrom);
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if (sender.DataContext is object content)
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{
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if (content is IConfirmation confirmation &&
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!await confirmation.Confirm())
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{
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args.Cancel = true;
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}
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}
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}
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sender.AddHandler(Frame.NavigatingFromEvent, HandleNavigatingFrom);
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sender.RemoveHandler(Frame.NavigatedFromEvent, HandleNavigatedFrom);
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if (sender.DataContext is object content)
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{
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if (content is IActivation activation)
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{
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activation.IsActive = true;
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activation.IsActive = false;
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}
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}
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void HandleUnloaded(object? _, RoutedEventArgs __)
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{
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sender.RemoveHandler(Frame.NavigatedToEvent, HandleNavigatedTo);
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sender.RemoveHandler(Frame.NavigatingFromEvent, HandleNavigatingFrom);
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control.Unloaded -= HandleUnloaded;
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if (control.DataContext is object content)
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if (content is IDisposable disposable)
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{
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if (content is IActivation activation)
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{
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activation.IsActive = true;
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}
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if (content is IDisposable disposable)
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FrameNavigationOptions? options = navigationStore.Get<FrameNavigationOptions>(frame);
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if (options is not FrameNavigationOptions frameOptions ||
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!frameOptions.IsNavigationStackEnabled)
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{
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disposable.Dispose();
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}
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}
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}
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sender.Unloaded += HandleUnloaded;
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}
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sender.AddHandler(Frame.NavigatedToEvent, HandleNavigatedTo);
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}
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sender.AddHandler(Frame.NavigatedFromEvent, HandleNavigatedFrom);
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control.DataContext = args.Content;
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FrameNavigationOptions navigationOptions = new();
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List<Action> postNavigateActions = [];
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void CleanUp(int start, int end)
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{
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int startIndex = Math.Max(0, start - 1);
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int endIndex = Math.Min(frame.BackStack.Count - 1, end - 1);
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for (int i = endIndex; i >= startIndex; i--)
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if (sender.DataContext is object content)
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{
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PageStackEntry? entry = frame.BackStack[i];
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if (entry.Context is Control control)
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if (content is IConfirmation confirmation &&
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!await confirmation.Confirm())
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{
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if (control.DataContext is IDisposable disposable)
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{
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disposable.Dispose();
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}
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}
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frame.BackStack.RemoveAt(i);
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}
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}
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if (args.Parameters is not null)
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{
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if (args.Parameters.TryGetValue("Transition", out object? transition))
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{
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switch ($"{transition}")
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{
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case "Suppress":
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navigationOptions.TransitionInfoOverride = new SuppressNavigationTransitionInfo();
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break;
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case "FromLeft":
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case "FromRight":
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case "FromTop":
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case "FromBottom":
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navigationOptions.TransitionInfoOverride = new SlideNavigationTransitionInfo
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{
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Effect = Enum.Parse<SlideNavigationTransitionEffect>($"{transition}")
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};
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break;
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}
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}
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if (args.Parameters.TryGetValue("IsBackStackEnabled", out object? isBackStackEnabled))
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{
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if (isBackStackEnabled is bool value)
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{
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navigationOptions.IsNavigationStackEnabled = value;
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}
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}
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if (args.Parameters.TryGetValue("ClearBackStack", out object? clearBackStack))
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{
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if (clearBackStack is bool clearBool)
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{
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if (clearBool)
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{
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postNavigateActions.Add(() => CleanUp(1, frame.BackStack.Count));
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}
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}
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if (clearBackStack is string clearString)
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{
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if (clearString.StartsWith('[') && clearString.EndsWith(']') && clearString.Contains('-'))
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{
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string range = clearString.Trim('[', ']');
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string[] parts = range.Split('-');
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if (parts.Length == 2 && int.TryParse(parts[0], out int start) &&
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int.TryParse(parts[1], out int end))
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{
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postNavigateActions.Add(() => CleanUp(start, end));
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}
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else
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{
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postNavigateActions.Add(() => CleanUp(1, frame.BackStack.Count));
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}
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}
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else
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{
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postNavigateActions.Add(() => CleanUp(1, frame.BackStack.Count));
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}
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args.Cancel = true;
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}
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}
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}
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Navigated(control);
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navigationStore.Set(frame, navigationOptions);
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frame.NavigateFromObject(control, navigationOptions);
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foreach (Action postAction in postNavigateActions)
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sender.AddHandler(Frame.NavigatingFromEvent, HandleNavigatingFrom);
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if (sender.DataContext is object content)
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{
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postAction.Invoke();
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if (content is IActivation activation)
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{
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activation.IsActive = true;
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}
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}
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void HandleUnloaded(object? _, RoutedEventArgs __)
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{
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sender.RemoveHandler(Frame.NavigatedToEvent, HandleNavigatedTo);
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sender.RemoveHandler(Frame.NavigatingFromEvent, HandleNavigatingFrom);
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control.Unloaded -= HandleUnloaded;
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if (control.DataContext is object content)
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{
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if (content is IActivation activation)
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{
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activation.IsActive = true;
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}
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if (content is IDisposable disposable)
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{
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disposable.Dispose();
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}
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}
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}
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sender.Unloaded += HandleUnloaded;
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}
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sender.AddHandler(Frame.NavigatedToEvent, HandleNavigatedTo);
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}
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control.DataContext = args.Content;
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FrameNavigationOptions navigationOptions = new();
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List<Action> postNavigateActions = [];
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void CleanUp(int start, int end)
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{
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int startIndex = Math.Max(0, start - 1);
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int endIndex = Math.Min(frame.BackStack.Count - 1, end - 1);
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for (int i = endIndex; i >= startIndex; i--)
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{
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PageStackEntry? entry = frame.BackStack[i];
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if (entry.Context is Control control)
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{
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if (control.DataContext is IDisposable disposable)
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{
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disposable.Dispose();
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}
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}
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frame.BackStack.RemoveAt(i);
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}
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}
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if (args.Parameters is not null)
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{
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if (args.Parameters.TryGetValue("Transition", out object? transition))
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{
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switch ($"{transition}")
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{
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case "Suppress":
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navigationOptions.TransitionInfoOverride = new SuppressNavigationTransitionInfo();
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break;
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case "FromLeft":
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case "FromRight":
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case "FromTop":
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case "FromBottom":
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navigationOptions.TransitionInfoOverride = new SlideNavigationTransitionInfo
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{
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Effect = Enum.Parse<SlideNavigationTransitionEffect>($"{transition}")
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};
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break;
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}
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}
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if (args.Parameters.TryGetValue("IsBackStackEnabled", out object? isBackStackEnabled))
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{
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if (isBackStackEnabled is bool value)
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{
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navigationOptions.IsNavigationStackEnabled = value;
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}
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}
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if (args.Parameters.TryGetValue("ClearBackStack", out object? clearBackStack))
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{
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if (clearBackStack is bool clearBool)
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{
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if (clearBool)
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{
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postNavigateActions.Add(() => CleanUp(1, frame.BackStack.Count));
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}
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}
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if (clearBackStack is string clearString)
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{
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if (clearString.StartsWith('[') && clearString.EndsWith(']') && clearString.Contains('-'))
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{
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string range = clearString.Trim('[', ']');
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string[] parts = range.Split('-');
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if (parts.Length == 2 && int.TryParse(parts[0], out int start) &&
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int.TryParse(parts[1], out int end))
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{
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postNavigateActions.Add(() => CleanUp(start, end));
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}
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else
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{
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postNavigateActions.Add(() => CleanUp(1, frame.BackStack.Count));
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}
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}
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else
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{
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postNavigateActions.Add(() => CleanUp(1, frame.BackStack.Count));
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}
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}
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}
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}
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Navigated(control);
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navigationStore.Set(frame, navigationOptions);
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frame.NavigateFromObject(control, navigationOptions);
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foreach (Action postAction in postNavigateActions)
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{
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postAction.Invoke();
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}
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}
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