Feature: Added support for previewing AVI files in the Preview Pane (#18419)

Signed-off-by: Josh65-2201 <26977075+Josh65-2201@users.noreply.github.com>

Author: Josh65-2201

src/Files.App/ViewModels/Properties/BasePropertiesPage.cs

@@ -62,8 +62,9 @@ protected override void OnNavigatedTo(NavigationEventArgs e)
 					BaseProperties = new CombinedFileProperties(ViewModel, np.CancellationTokenSource, DispatcherQueue, items, AppInstance);
 
 					ViewModel.IsEditAlbumCoverVisible =
+						items.All(item => item.FileExtension is not ".avi") && (
 						items.All(item => FileExtensionHelpers.IsVideoFile(item.FileExtension)) ||
-						items.All(item => FileExtensionHelpers.IsAudioFile(item.FileExtension));
+						items.All(item => FileExtensionHelpers.IsAudioFile(item.FileExtension)));
 				}
 				// Selection includes folders
 				else

src/Files.App/ViewModels/Properties/Items/FileProperties.cs

@@ -46,8 +46,9 @@ public override void GetBaseProperties()
 			ViewModel.LoadFileIcon = Item.LoadFileIcon;
 			ViewModel.IsDownloadedFile = Win32Helper.ReadStringFromFile($"{Item.ItemPath}:Zone.Identifier") is not null;
 			ViewModel.IsEditAlbumCoverVisible =
+				Item.FileExtension is not ".avi" && (
 				FileExtensionHelpers.IsVideoFile(Item.FileExtension) ||
-				FileExtensionHelpers.IsAudioFile(Item.FileExtension);
+				FileExtensionHelpers.IsAudioFile(Item.FileExtension));
 
 			if (!Item.IsShortcut)
 				return;

src/Files.Shared/Helpers/FileExtensionHelpers.cs

@@ -87,7 +87,7 @@ public static bool IsAudioFile(string? fileExtensionToCheck)
 		/// <returns><c>true</c> if the fileExtensionToCheck is a video file; otherwise, <c>false</c>.</returns>
 		public static bool IsVideoFile(string? fileExtensionToCheck)
 		{
-			return HasExtension(fileExtensionToCheck, ".mp4", ".webm", ".ogg", ".mov", ".qt", ".m4v", ".mp4v", ".3g2", ".3gp2", ".3gp", ".3gpp", ".mkv");
+			return HasExtension(fileExtensionToCheck, ".avi", ".mp4", ".webm", ".ogg", ".mov", ".qt", ".m4v", ".mp4v", ".3g2", ".3gp2", ".3gp", ".3gpp", ".mkv");
 		}
 
 		/// <summary>