Use IsValidForFilename method

Author: hecksmosis

src/Files.App/Filesystem/FilesystemOperations/Helpers/FilesystemHelpers.cs

@@ -648,7 +648,7 @@ public async Task<ReturnResult> RecycleItemsFromClipboard(DataPackageView packag
 
 		#endregion IFilesystemHelpers
 
-		private static bool IsValidForFilename(string name)
+		public static bool IsValidForFilename(string name)
 			=> !string.IsNullOrWhiteSpace(name) && !ContainsRestrictedCharacters(name) && !ContainsRestrictedFileName(name);
 
 		private static async Task<(List<FileNameConflictResolveOptionType> collisions, bool cancelOperation, IEnumerable<IFileSystemDialogConflictItemViewModel>)> GetCollision(FilesystemOperationType operationType, IEnumerable<IStorageItemWithPath> source, IEnumerable<string> destination, bool forceDialog)

src/Files.App/Helpers/DynamicDialogFactory.cs

@@ -66,18 +66,18 @@ public static DynamicDialog GetFor_RenameDialog()
 
 			TextBlock tipText = new()
 			{
-				Text = "RenameDialogSymbolsTip/Text".GetLocalizedResource(),
+				Text = "InvalidFilename/Text".GetLocalizedResource(),
 				Margin = new Microsoft.UI.Xaml.Thickness(0, 0, 4, 0),
 				TextWrapping = Microsoft.UI.Xaml.TextWrapping.Wrap,
 				Opacity = 0.0d
 			};
 
 			inputText.TextChanged += (textBox, args) =>
 			{
-				tipText.Opacity = FilesystemHelpers.ContainsRestrictedCharacters(inputText.Text) ? 1.0d : 0.0d;
-				dialog!.ViewModel.DynamicButtonsEnabled = string.IsNullOrWhiteSpace(inputText.Text) || FilesystemHelpers.ContainsRestrictedCharacters(inputText.Text) 
-														? DynamicDialogButtons.Cancel 
-														: DynamicDialogButtons.Primary | DynamicDialogButtons.Cancel;
+				tipText.Opacity = FilesystemHelpers.IsValidForFilename(inputText.Text) ? 0.0d : 1.0d;
+				dialog!.ViewModel.DynamicButtonsEnabled = FilesystemHelpers.IsValidForFilename(inputText.Text)
+														? DynamicDialogButtons.Primary | DynamicDialogButtons.Cancel
+														: DynamicDialogButtons.Cancel;
 			};
 
 			inputText.Loaded += (s, e) =>

src/Files.App/Strings/en-US/Resources.resw

@@ -513,8 +513,8 @@
   <data name="FileNameTeachingTip.CloseButtonContent" xml:space="preserve">
     <value>OK</value>
   </data>
-  <data name="RenameDialogSymbolsTip.Text" xml:space="preserve">
-    <value>The item name must not contain the following characters: \ / : * ? " &lt; &gt; |</value>
+  <data name="InvalidFilename.Text" xml:space="preserve">
+    <value>The item name specified is invalid</value>
   </data>
   <data name="ItemSelected.Text" xml:space="preserve">
     <value>item selected</value>