Add support of populating chevron drop down

Author: 0x5bfa

Diff for: src/Files.App/UserControls/NavigationToolbar.xaml

@@ -352,9 +352,9 @@
 				Text="{x:Bind ViewModel.OmnibarPathModeText, Mode=OneWay}">
 				<controls:OmnibarMode.ContentOnInactive>
 					<controls:BreadcrumbBar
-						x:Name="NewBreadcrumbBar"
-						ItemDropDownFlyoutClosed="NewBreadcrumbBar_ItemDropDownFlyoutClosed"
-						ItemDropDownFlyoutOpening="NewBreadcrumbBar_ItemDropDownFlyoutOpening"
+						x:Name="BreadcrumbBar"
+						ItemDropDownFlyoutClosed="BreadcrumbBar_ItemDropDownFlyoutClosed"
+						ItemDropDownFlyoutOpening="BreadcrumbBar_ItemDropDownFlyoutOpening"
 						ItemsSource="{x:Bind ViewModel.PathComponents, Mode=OneWay}">
 						<controls:BreadcrumbBar.RootItem>
 							<Image

Diff for: src/Files.App/UserControls/NavigationToolbar.xaml.cs

@@ -134,14 +134,15 @@ private void ClickablePath_GettingFocus(UIElement sender, GettingFocusEventArgs
 		}
 		#endregion
 
-		private void NewBreadcrumbBar_ItemDropDownFlyoutOpening(object sender, Controls.BreadcrumbBarItemDropDownFlyoutEventArgs e)
+		private async void BreadcrumbBar_ItemDropDownFlyoutOpening(object sender, Controls.BreadcrumbBarItemDropDownFlyoutEventArgs e)
 		{
-
+			await ViewModel.SetPathBoxDropDownFlyoutAsync(e.Flyout, ViewModel.PathComponents[e.Index]);
 		}
 
-		private void NewBreadcrumbBar_ItemDropDownFlyoutClosed(object sender, Controls.BreadcrumbBarItemDropDownFlyoutEventArgs e)
+		private void BreadcrumbBar_ItemDropDownFlyoutClosed(object sender, Controls.BreadcrumbBarItemDropDownFlyoutEventArgs e)
 		{
-
+			// Clear the flyout items to save memory
+			e.Flyout.Items.Clear();
 		}
 
 		private void Button_AccessKeyInvoked(UIElement sender, AccessKeyInvokedEventArgs args)

Diff for: src/Files.App/ViewModels/UserControls/NavigationToolbarViewModel.cs

@@ -709,12 +709,12 @@ public void SearchRegion_LostFocus(object sender, RoutedEventArgs e)
 		private void SearchRegion_Escaped(object? sender, ISearchBoxViewModel _SearchBox)
 			=> CloseSearchBox(true);
 
-		public async Task SetPathBoxDropDownFlyoutAsync(MenuFlyout flyout, PathBoxItem pathItem, IShellPage shellPage)
+		public async Task SetPathBoxDropDownFlyoutAsync(MenuFlyout flyout, PathBoxItem pathItem)
 		{
 			var nextPathItemTitle = PathComponents[PathComponents.IndexOf(pathItem) + 1].Title;
 			IList<StorageFolderWithPath>? childFolders = null;
 
-			StorageFolderWithPath folder = await shellPage.ShellViewModel.GetFolderWithPathFromPathAsync(pathItem.Path);
+			StorageFolderWithPath folder = await ContentPageContext.ShellPage.ShellViewModel.GetFolderWithPathFromPathAsync(pathItem.Path);
 			if (folder is not null)
 				childFolders = (await FilesystemTasks.Wrap(() => folder.GetFoldersWithPathAsync(string.Empty))).Result;
 
@@ -755,7 +755,7 @@ public async Task SetPathBoxDropDownFlyoutAsync(MenuFlyout flyout, PathBoxItem p
 					flyoutItem.Click += (sender, args) =>
 					{
 						// Navigate to the directory
-						shellPage.NavigateToPath(childFolder.Path);
+						ContentPageContext.ShellPage.NavigateToPath(childFolder.Path);
 					};
 				}
 

Diff for: src/Files.App/Views/Shells/BaseShellPage.cs

@@ -422,15 +422,15 @@ protected async void ShellPage_AddressBarTextEntered(object sender, AddressBarTe
 
 		protected async void ShellPage_ToolbarPathItemLoaded(object sender, ToolbarPathItemLoadedEventArgs e)
 		{
-			await ToolbarViewModel.SetPathBoxDropDownFlyoutAsync(e.OpenedFlyout, e.Item, this);
+			await ToolbarViewModel.SetPathBoxDropDownFlyoutAsync(e.OpenedFlyout, e.Item);
 		}
 
 		protected async void ShellPage_ToolbarFlyoutOpening(object sender, ToolbarFlyoutOpeningEventArgs e)
 		{
 			var pathBoxItem = ((Button)e.OpeningFlyout.Target).DataContext as PathBoxItem;
 
 			if (pathBoxItem is not null)
-				await ToolbarViewModel.SetPathBoxDropDownFlyoutAsync(e.OpeningFlyout, pathBoxItem, this);
+				await ToolbarViewModel.SetPathBoxDropDownFlyoutAsync(e.OpeningFlyout, pathBoxItem);
 		}
 
 		protected async void NavigationToolbar_QuerySubmitted(object sender, ToolbarQuerySubmittedEventArgs e)