Feature: Added proper support for RTL languages

src/Files.App.CsWin32/NativeMethods.txt

@@ -160,3 +160,5 @@ IApplicationDocumentLists
 ApplicationDocumentLists
 IApplicationActivationManager
 MENU_ITEM_TYPE
+SetWindowLongPtr
+GetWindowLongPtr

src/Files.App/App.xaml.cs

@@ -3,6 +3,9 @@
 
 using CommunityToolkit.WinUI.Helpers;
 using Files.App.Helpers.Application;
+using Files.App.Services.Content;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
 using Microsoft.UI.Xaml;
 using Microsoft.UI.Xaml.Controls;
@@ -97,6 +100,11 @@ async Task ActivateAsync()
 				var userSettingsService = Ioc.Default.GetRequiredService<IUserSettingsService>();
 				var isLeaveAppRunning = userSettingsService.GeneralSettingsService.LeaveAppRunning;
 
+				var realTimeLayoutService = Ioc.Default.GetRequiredService<IRealTimeLayoutService>();
+				realTimeLayoutService.UpdateCulture(new(AppLanguageHelper.PreferredLanguage.Code));
+
+				MainWindow.Instance.InitializeContentLayout();
+
 				if (isStartupTask && !isLeaveAppRunning)
 				{
 					// Initialize and activate MainWindow

src/Files.App/Data/Contracts/IRealTimeControl.cs

@@ -0,0 +1,26 @@
+// Copyright (c) 2024 Files Community
+// Licensed under the MIT License. See the LICENSE.
+
+namespace Files.App.Data.Contracts
+{
+	/// <summary>
+	/// Defines an interface for real-time control components that manage content layout updates.
+	/// </summary>
+	internal interface IRealTimeControl
+	{
+		/// <summary>
+		/// Gets the service for managing real-time layout updates.
+		/// </summary>
+		IRealTimeLayoutService RealTimeLayoutService { get; }
+
+		/// <summary>
+		/// Initializes the content layout for the control.
+		/// </summary>
+		void InitializeContentLayout();
+
+		/// <summary>
+		/// Updates the content layout of the control.
+		/// </summary>
+		void UpdateContentLayout();
+	}
+}

src/Files.App/Data/Contracts/IRealTimeLayoutService.cs

@@ -0,0 +1,65 @@
+// Copyright (c) 2024 Files Community
+// Licensed under the MIT License. See the LICENSE.
+
+using Microsoft.UI.Xaml;
+using System.Globalization;
+
+namespace Files.App.Data.Contracts
+{
+	/// <summary>
+	/// Provides an interface for managing real-time layout updates and related operations.
+	/// </summary>
+	public interface IRealTimeLayoutService
+	{
+		/// <summary>
+		/// Occurs when the flow direction of the layout changes.
+		/// </summary>
+		public event EventHandler<FlowDirection>? FlowDirectionChanged;
+
+		/// <summary>
+		/// Gets the current flow direction for layout (e.g., LeftToRight or RightToLeft).
+		/// </summary>
+		FlowDirection FlowDirection { get; }
+
+		/// <summary>
+		/// Updates the culture settings for the layout.
+		/// </summary>
+		/// <param name="culture">The culture information to apply.</param>
+		void UpdateCulture(CultureInfo culture);
+
+		/// <summary>
+		/// Adds a callback for a <see cref="Window"/> implementing <see cref="IRealTimeWindow"/>.
+		/// The callback is automatically removed when the window is closed.
+		/// </summary>
+		/// <param name="target">The <see cref="Window"/> instance that implements <see cref="IRealTimeWindow"/>.</param>
+		/// <param name="callback">The action to be executed when the callback is triggered.</param>
+		void AddCallback(Window target, Action callback);
+
+		/// <summary>
+		/// Adds a callback for a <see cref="FrameworkElement"/> implementing <see cref="IRealTimeControl"/>.
+		/// The callback is automatically removed when the element is unloaded.
+		/// </summary>
+		/// <param name="target">The <see cref="FrameworkElement"/> instance that implements <see cref="IRealTimeControl"/>.</param>
+		/// <param name="callback">The action to be executed when the callback is triggered.</param>
+		void AddCallback(FrameworkElement target, Action callback);
+
+		/// <summary>
+		/// Updates the title bar layout of the specified window based on the current flow direction.
+		/// </summary>
+		/// <param name="window">The window whose title bar layout needs updating.</param>
+		/// <returns>True if the title bar layout was successfully updated; otherwise, false.</returns>
+		bool UpdateTitleBar(Window window);
+
+		/// <summary>
+		/// Updates the content layout of the specified window to match the current flow direction.
+		/// </summary>
+		/// <param name="window">The window whose content layout needs updating.</param>
+		void UpdateContent(Window window);
+
+		/// <summary>
+		/// Updates the content layout of the specified framework element to match the current flow direction.
+		/// </summary>
+		/// <param name="frameworkElement">The framework element whose content layout needs updating.</param>
+		void UpdateContent(FrameworkElement frameworkElement);
+	}
+}

src/Files.App/Data/Contracts/IRealTimeWindow.cs

@@ -0,0 +1,26 @@
+// Copyright (c) 2024 Files Community
+// Licensed under the MIT License. See the LICENSE.
+
+namespace Files.App.Data.Contracts
+{
+	/// <summary>
+	/// Defines an interface for real-time window components that manage content layout updates.
+	/// </summary>
+	internal interface IRealTimeWindow
+	{
+		/// <summary>
+		/// Gets the service for managing real-time layout updates.
+		/// </summary>
+		IRealTimeLayoutService RealTimeLayoutService { get; }
+
+		/// <summary>
+		/// Initializes the content layout for the window.
+		/// </summary>
+		void InitializeContentLayout();
+
+		/// <summary>
+		/// Updates the content layout of the window.
+		/// </summary>
+		void UpdateContentLayout();
+	}
+}

src/Files.App/Data/Enums/ArrowSymbolType.cs

@@ -0,0 +1,13 @@
+// Copyright (c) 2024 Files Community
+// Licensed under the MIT License. See the LICENSE.
+
+namespace Files.App.Data.Enums
+{
+    public enum ArrowSymbolType
+    {
+        Forward,
+        Back,
+        ChevronLeft,
+        ChevronRight
+    }
+}

src/Files.App/Dialogs/AddBranchDialog.xaml.cs

@@ -7,7 +7,7 @@
 
 namespace Files.App.Dialogs
 {
-	public sealed partial class AddBranchDialog : ContentDialog, IDialog<AddBranchDialogViewModel>
+	public sealed partial class AddBranchDialog : ContentDialog, IDialog<AddBranchDialogViewModel>, IRealTimeControl
 	{
 		private FrameworkElement RootAppElement
 			=> (FrameworkElement)MainWindow.Instance.Content;
@@ -21,6 +21,7 @@ public AddBranchDialogViewModel ViewModel
 		public AddBranchDialog()
 		{
 			InitializeComponent();
+			InitializeContentLayout();
 		}
 
 		public new async Task<DialogResult> ShowAsync() => (DialogResult)await base.ShowAsync();

src/Files.App/Dialogs/AddItemDialog.xaml.cs

@@ -8,7 +8,7 @@
 
 namespace Files.App.Dialogs
 {
-	public sealed partial class AddItemDialog : ContentDialog, IDialog<AddItemDialogViewModel>
+	public sealed partial class AddItemDialog : ContentDialog, IDialog<AddItemDialogViewModel>, IRealTimeControl
 	{
 		private readonly IAddItemService addItemService = Ioc.Default.GetRequiredService<IAddItemService>();
 
@@ -24,6 +24,7 @@ public AddItemDialogViewModel ViewModel
 		public AddItemDialog()
 		{
 			InitializeComponent();
+			InitializeContentLayout();
 		}
 
 		public new async Task<DialogResult> ShowAsync()

src/Files.App/Dialogs/BulkRenameDialog.xaml.cs

@@ -5,7 +5,7 @@
 
 namespace Files.App.Dialogs
 {
-	public sealed partial class BulkRenameDialog : ContentDialog, IDialog<BulkRenameDialogViewModel>
+	public sealed partial class BulkRenameDialog : ContentDialog, IDialog<BulkRenameDialogViewModel>, IRealTimeControl
 	{
 		private FrameworkElement RootAppElement
 			=> (FrameworkElement)MainWindow.Instance.Content;
@@ -19,6 +19,7 @@ public BulkRenameDialogViewModel ViewModel
 		public BulkRenameDialog()
 		{
 			InitializeComponent();
+			InitializeContentLayout();
 		}
 
 		public new async Task<DialogResult> ShowAsync()

src/Files.App/Dialogs/CreateArchiveDialog.xaml.cs

@@ -8,7 +8,7 @@
 
 namespace Files.App.Dialogs
 {
-	public sealed partial class CreateArchiveDialog : ContentDialog
+	public sealed partial class CreateArchiveDialog : ContentDialog, IRealTimeControl
 	{
 		private FrameworkElement RootAppElement
 			=> (FrameworkElement)MainWindow.Instance.Content;
@@ -63,6 +63,7 @@ public int CPUThreads
 		public CreateArchiveDialog()
 		{
 			InitializeComponent();
+			InitializeContentLayout();
 
 			ViewModel.PropertyChanged += ViewModel_PropertyChanged;
 		}

src/Files.App/Dialogs/CreateShortcutDialog.xaml.cs

@@ -9,7 +9,7 @@
 
 namespace Files.App.Dialogs
 {
-	public sealed partial class CreateShortcutDialog : ContentDialog, IDialog<CreateShortcutDialogViewModel>
+	public sealed partial class CreateShortcutDialog : ContentDialog, IDialog<CreateShortcutDialogViewModel>, IRealTimeControl
 	{
 		private FrameworkElement RootAppElement
 			=> (FrameworkElement)MainWindow.Instance.Content;
@@ -23,6 +23,7 @@ public CreateShortcutDialogViewModel ViewModel
 		public CreateShortcutDialog()
 		{
 			InitializeComponent();
+			InitializeContentLayout();
 			this.Closing += CreateShortcutDialog_Closing;
 
 			InvalidPathWarning.SetBinding(TeachingTip.TargetProperty, new Binding()

src/Files.App/Dialogs/CredentialDialog.xaml.cs

@@ -7,7 +7,7 @@
 
 namespace Files.App.Dialogs
 {
-	public sealed partial class CredentialDialog : ContentDialog, IDialog<CredentialDialogViewModel>
+	public sealed partial class CredentialDialog : ContentDialog, IDialog<CredentialDialogViewModel>, IRealTimeControl
 	{
 		private FrameworkElement RootAppElement
 			=> (FrameworkElement)MainWindow.Instance.Content;
@@ -21,6 +21,7 @@ public CredentialDialogViewModel ViewModel
 		public CredentialDialog()
 		{
 			InitializeComponent();
+			InitializeContentLayout();
 		}
 
 		public new async Task<DialogResult> ShowAsync()

src/Files.App/Dialogs/DecompressArchiveDialog.xaml.cs

@@ -8,7 +8,7 @@
 
 namespace Files.App.Dialogs
 {
-	public sealed partial class DecompressArchiveDialog : ContentDialog
+	public sealed partial class DecompressArchiveDialog : ContentDialog, IRealTimeControl
 	{
 		private FrameworkElement RootAppElement
 			=> (FrameworkElement)MainWindow.Instance.Content;
@@ -22,6 +22,7 @@ public DecompressArchiveDialogViewModel ViewModel
 		public DecompressArchiveDialog()
 		{
 			InitializeComponent();
+			InitializeContentLayout();
 		}
 
 		private void ContentDialog_PrimaryButtonClick(ContentDialog sender, ContentDialogButtonClickEventArgs args)

src/Files.App/Dialogs/DynamicDialog.xaml.cs

@@ -7,7 +7,7 @@
 
 namespace Files.App.Dialogs
 {
-	public sealed partial class DynamicDialog : ContentDialog, IDisposable
+	public sealed partial class DynamicDialog : ContentDialog, IDisposable, IRealTimeControl
 	{
 		private FrameworkElement RootAppElement
 			=> (FrameworkElement)MainWindow.Instance.Content;
@@ -31,6 +31,7 @@ public DynamicDialogResult DynamicResult
 		public DynamicDialog(DynamicDialogViewModel dynamicDialogViewModel)
 		{
 			InitializeComponent();
+			InitializeContentLayout();
 
 			dynamicDialogViewModel.HideDialog = Hide;
 			ViewModel = dynamicDialogViewModel;

src/Files.App/Dialogs/ElevateConfirmDialog.xaml.cs

@@ -9,7 +9,7 @@
 
 namespace Files.App.Dialogs
 {
-	public sealed partial class ElevateConfirmDialog : ContentDialog, IDialog<ElevateConfirmDialogViewModel>
+	public sealed partial class ElevateConfirmDialog : ContentDialog, IDialog<ElevateConfirmDialogViewModel>, IRealTimeControl
 	{
 		private FrameworkElement RootAppElement
 			=> (FrameworkElement)MainWindow.Instance.Content;
@@ -23,6 +23,7 @@ public ElevateConfirmDialogViewModel ViewModel
 		public ElevateConfirmDialog()
 		{
 			InitializeComponent();
+			InitializeContentLayout();
 		}
 
 		public new async Task<DialogResult> ShowAsync()

src/Files.App/Dialogs/FileTooLargeDialog.xaml.cs

@@ -6,7 +6,7 @@
 
 namespace Files.App.Dialogs
 {
-	public sealed partial class FileTooLargeDialog : ContentDialog, IDialog<FileTooLargeDialogViewModel>
+	public sealed partial class FileTooLargeDialog : ContentDialog, IDialog<FileTooLargeDialogViewModel>, IRealTimeControl
 	{
 		private FrameworkElement RootAppElement
 			=> (FrameworkElement)MainWindow.Instance.Content;
@@ -20,6 +20,7 @@ public FileTooLargeDialogViewModel ViewModel
 		public FileTooLargeDialog()
 		{
 			InitializeComponent();
+			InitializeContentLayout();
 		}
 
 		public new async Task<DialogResult> ShowAsync()

src/Files.App/Dialogs/FilesystemOperationDialog.xaml.cs

@@ -8,7 +8,7 @@
 
 namespace Files.App.Dialogs
 {
-	public sealed partial class FilesystemOperationDialog : ContentDialog, IDialog<FileSystemDialogViewModel>
+	public sealed partial class FilesystemOperationDialog : ContentDialog, IDialog<FileSystemDialogViewModel>, IRealTimeControl
 	{
 		private FrameworkElement RootAppElement
 			=> (FrameworkElement)MainWindow.Instance.Content;
@@ -30,6 +30,7 @@ public FileSystemDialogViewModel ViewModel
 		public FilesystemOperationDialog()
 		{
 			InitializeComponent();
+			InitializeContentLayout();
 
 			MainWindow.Instance.SizeChanged += Current_SizeChanged;
 		}

src/Files.App/Dialogs/GitHubLoginDialog.xaml.cs

@@ -7,7 +7,7 @@
 
 namespace Files.App.Dialogs
 {
-	public sealed partial class GitHubLoginDialog : ContentDialog, IDialog<GitHubLoginDialogViewModel>
+	public sealed partial class GitHubLoginDialog : ContentDialog, IDialog<GitHubLoginDialogViewModel>, IRealTimeControl
 	{
 		private FrameworkElement RootAppElement
 			=> (FrameworkElement)MainWindow.Instance.Content;
@@ -29,6 +29,7 @@ public GitHubLoginDialogViewModel ViewModel
 		public GitHubLoginDialog()
 		{
 			InitializeComponent();
+			InitializeContentLayout();
 		}
 
 		public new async Task<DialogResult> ShowAsync()

src/Files.App/Dialogs/ReleaseNotesDialog.xaml.cs

@@ -7,7 +7,7 @@
 
 namespace Files.App.Dialogs
 {
-	public sealed partial class ReleaseNotesDialog : ContentDialog, IDialog<ReleaseNotesDialogViewModel>
+	public sealed partial class ReleaseNotesDialog : ContentDialog, IDialog<ReleaseNotesDialogViewModel>, IRealTimeControl
 	{
 		private FrameworkElement RootAppElement
 			=> (FrameworkElement)MainWindow.Instance.Content;
@@ -21,6 +21,7 @@ public ReleaseNotesDialogViewModel ViewModel
 		public ReleaseNotesDialog()
 		{
 			InitializeComponent();
+			InitializeContentLayout();
 
 			MainWindow.Instance.SizeChanged += Current_SizeChanged;
 			UpdateDialogLayout();