Feature: Update columns in existing tabs after changing the defaults in settings (#16512)

Author: ferrariofilippo

src/Files.App/Helpers/Layout/LayoutPreferencesManager.cs

@@ -236,7 +236,7 @@ public uint GetRoundedIconSize()
 				_ when LayoutMode == FolderLayoutModes.GridView && UserSettingsService.LayoutSettingsService.GridViewSize <= GridViewSizeKind.Small ||
 					   LayoutMode == FolderLayoutModes.TilesView
 					=> 96,
-				_ when  LayoutMode == FolderLayoutModes.GridView && UserSettingsService.LayoutSettingsService.GridViewSize <= GridViewSizeKind.Large
+				_ when LayoutMode == FolderLayoutModes.GridView && UserSettingsService.LayoutSettingsService.GridViewSize <= GridViewSizeKind.Large
 					=> 128,
 				_ => 256,
 			};
@@ -265,6 +265,13 @@ public Type GetLayoutType(string path, bool changeLayoutMode = true)
 			};
 		}
 
+		public bool IsPathUsingDefaultLayout(string? path)
+		{
+			return UserSettingsService.LayoutSettingsService.SyncFolderPreferencesAcrossDirectories ||
+				string.IsNullOrEmpty(path) ||
+				GetLayoutPreferencesFromDatabase(path, Win32Helper.GetFolderFRN(path)) is null;
+		}
+
 		public void ToggleLayoutModeColumnView(bool manuallySet)
 		{
 			IsAdaptiveLayoutEnabled &= !manuallySet;
@@ -594,7 +601,7 @@ private static bool SetLayoutPreferencesToDatabase(string path, ulong? frn, Layo
 				}
 
 				dbInstance.SetPreferences(path, frn, preferencesItem);
-			});	
+			});
 		}
 
 		private bool SetProperty<TValue>(Func<LayoutPreferencesItem, TValue> prop, Action<LayoutPreferencesItem> update, string propertyName)

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

@@ -206,6 +206,32 @@ private void LayoutSettingsService_PropertyChanged(object? sender, PropertyChang
 				// Restore correct scroll position
 				ContentScroller?.ChangeView(null, previousOffset, null);
 			}
+			else
+			{
+				var settings = sender as ILayoutSettingsService;
+				var isDefaultPath = FolderSettings?.IsPathUsingDefaultLayout(ParentShellPageInstance?.ShellViewModel.CurrentFolder?.ItemPath);
+				if (settings is not null && (isDefaultPath ?? true))
+				{
+					switch (e.PropertyName)
+					{
+						case nameof(ILayoutSettingsService.ShowFileTagColumn):
+							ColumnsViewModel.TagColumn.UserCollapsed = !settings.ShowFileTagColumn;
+							break;
+						case nameof(ILayoutSettingsService.ShowSizeColumn):
+							ColumnsViewModel.SizeColumn.UserCollapsed = !settings.ShowSizeColumn;
+							break;
+						case nameof(ILayoutSettingsService.ShowTypeColumn):
+							ColumnsViewModel.ItemTypeColumn.UserCollapsed = !settings.ShowTypeColumn;
+							break;
+						case nameof(ILayoutSettingsService.ShowDateCreatedColumn):
+							ColumnsViewModel.DateCreatedColumn.UserCollapsed = !settings.ShowDateCreatedColumn;
+							break;
+						case nameof(ILayoutSettingsService.ShowDateColumn):
+							ColumnsViewModel.DateModifiedColumn.UserCollapsed = !settings.ShowDateColumn;
+							break;
+					}
+				}
+			}
 		}
 
 		/// <summary>