Feature: Add option to display file extensions only when renaming files

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

@@ -111,5 +111,10 @@ public interface IAppearanceSettingsService : IBaseSettingsService, INotifyPrope
 		/// Gets or sets a value whether the home button should be displayed.
 		/// </summary>
 		bool ShowHomeButton { get; set; }
+
+		/// <summary>
+		/// Gets or sets a value whether the file extension should be displayed always or only during the editing.
+		/// </summary>
+		bool ShowFileExtensionsOnlyWhileEditing { get; set; }
 	}
 }

src/Files.App/Services/Settings/AppearanceSettingsService.cs

@@ -148,7 +148,14 @@ public bool ShowTabActions
 		/// <inheritdoc/>
 		public bool ShowHomeButton
 		{
-			get => Get(false);
+			get => Get(true);
+			set => Set(value);
+		}
+
+		/// <inheritdoc/>
+		public bool ShowFileExtensionsOnlyWhileEditing
+		{
+			get => Get<bool>(true);
 			set => Set(value);
 		}
 

src/Files.App/Services/Storage/StorageCacheService.cs

@@ -10,13 +10,28 @@ internal sealed class StorageCacheService : IStorageCacheService
 	{
 		private readonly ConcurrentDictionary<string, string> cachedDictionary = new();
 
+		private readonly IUserSettingsService _userSettingsService;
+
+		public StorageCacheService(IUserSettingsService userSettingsService)
+		{
+			_userSettingsService = userSettingsService;
+		}
+
 		/// <inheritdoc/>
 		public ValueTask<string> GetDisplayName(string path, CancellationToken cancellationToken)
 		{
-			return
-				cachedDictionary.TryGetValue(path, out var displayName)
+			if (_userSettingsService.AppearanceSettingsService.ShowFileExtensionsOnlyWhileEditing)
+			{
+				return cachedDictionary.TryGetValue(path, out var displayName)
 					? ValueTask.FromResult(displayName)
-					: ValueTask.FromResult(string.Empty);
+					: ValueTask.FromResult(SystemIO.Path.GetFileName(path));
+			}
+			else
+			{
+				return cachedDictionary.TryGetValue(path, out var displayName)
+					? ValueTask.FromResult(SystemIO.Path.GetFileNameWithoutExtension(displayName))
+					: ValueTask.FromResult(SystemIO.Path.GetFileNameWithoutExtension(path));
+			}
 		}
 
 		/// <inheritdoc/>

src/Files.App/Utils/Storage/Enumerators/Win32StorageEnumerator.cs

@@ -227,7 +227,10 @@ CancellationToken cancellationToken
 		)
 		{
 			var itemPath = Path.Combine(pathRoot, findData.cFileName);
-			var itemName = findData.cFileName;
+
+			var itemName = await fileListCache.GetDisplayName(itemPath, cancellationToken);
+			if (string.IsNullOrEmpty(itemName))
+				itemName = findData.cFileName;
 
 			DateTime itemModifiedDate, itemCreatedDate, itemLastAccessDate;
 

src/Files.App/ViewModels/Settings/AppearanceViewModel.cs

@@ -315,5 +315,19 @@ public bool ShowHomeButton
 				}
 			}
 		}
+
+		public bool ShowFileExtensions
+		{
+			get => UserSettingsService.AppearanceSettingsService.ShowFileExtensionsOnlyWhileEditing;
+			set
+			{
+				if (value != UserSettingsService.AppearanceSettingsService.ShowFileExtensionsOnlyWhileEditing)
+				{
+					UserSettingsService.AppearanceSettingsService.ShowFileExtensionsOnlyWhileEditing = value;
+
+					OnPropertyChanged();
+				}
+			}
+		}
 	}
 }

src/Files.App/Views/Layouts/DetailsLayoutPage.xaml.cs

@@ -362,6 +362,11 @@ override public void StartRenameItem()
 				return;
 
 			Grid.SetColumnSpan(textBox.FindParent<Grid>(), 8);
+
+			if (RenamingItem is ListedItem item)
+			{
+				textBox.Text = SystemIO.Path.GetFileName(item.ItemPath);
+			}
 		}
 
 		private void ItemNameTextBox_BeforeTextChanging(TextBox textBox, TextBoxBeforeTextChangingEventArgs args)

src/Files.App/Views/Settings/AppearancePage.xaml

@@ -277,6 +277,15 @@
 								IsOn="{x:Bind ViewModel.ShowToolbar, Mode=TwoWay}"
 								Style="{StaticResource RightAlignedToggleSwitchStyle}" />
 						</local:SettingsBlockControl>
+
+						<!--  Show file extensions  -->
+						<local:SettingsBlockControl Title="{helpers:ResourceString Name=ShowFileExtensions}" HorizontalAlignment="Stretch">
+							<ToggleSwitch
+								AutomationProperties.AutomationControlType="Custom"
+								AutomationProperties.Name="{helpers:ResourceString Name=ShowFileExtensions}"
+								IsOn="{x:Bind ViewModel.ShowFileExtensions, Mode=TwoWay}"
+								Style="{StaticResource RightAlignedToggleSwitchStyle}" />
+						</local:SettingsBlockControl>
 					</StackPanel>
 				</local:SettingsBlockControl.ExpandableContent>
 			</local:SettingsBlockControl>