Add open containing folder action

Services/LauncherController.cs

@@ -72,7 +72,7 @@ public sealed class LauncherController : IDisposable
             return;
         }
 
-        popup = new LauncherPopup(Config, LaunchItem, OpenAllItems, ShowSettings, ShowSettings);
+        popup = new LauncherPopup(Config, LaunchItem, OpenAllItems, ShowSettings, ShowSettings, OpenContainingFolderFromPopup);
         popup.Closed += (_, _) => popup = null;
         popup.ShowNearTaskbar();
     }
@@ -221,6 +221,50 @@ public sealed class LauncherController : IDisposable
         }
     }
 
+    private void OpenContainingFolderFromPopup(LauncherItem item)
+    {
+        if (!OpenContainingFolder(item, out string? error) && !string.IsNullOrWhiteSpace(error))
+        {
+            System.Windows.MessageBox.Show(error, "Taskbar Launcher");
+        }
+    }
+
+    public static bool OpenContainingFolder(LauncherItem item, out string? error)
+    {
+        error = null;
+
+        if (item.Type == LauncherItemType.Menu || string.IsNullOrWhiteSpace(item.Target))
+        {
+            return false;
+        }
+
+        string target = Environment.ExpandEnvironmentVariables(item.Target);
+        string? folderPath = Directory.Exists(target)
+            ? target
+            : Path.GetDirectoryName(target);
+
+        if (string.IsNullOrWhiteSpace(folderPath) || !Directory.Exists(folderPath))
+        {
+            error = $"{item.Title}: Containing folder was not found.";
+            return false;
+        }
+
+        try
+        {
+            Process.Start(new ProcessStartInfo
+            {
+                FileName = folderPath,
+                UseShellExecute = true
+            });
+            return true;
+        }
+        catch (Exception ex)
+        {
+            error = $"{item.Title}: {ex.Message}";
+            return false;
+        }
+    }
+
     private static bool TryLaunchItem(LauncherItem item, out string? error)
     {
         error = null;