Fix .targetFolderNodes(for:) in file browser

CHANGELOG.md

@@ -17,9 +17,10 @@
 
 ### Fixes
 
+- Fix an issue in the file browser that some actions for the root folder were incorrectly disabled.
 - Fix an issue that changes of insertion formats in the Snippets settings pane were not saved.
 - Fix an issue that the initial visibility state of the navigation bar was reversed.
-- [trivial] Fix an issue that the action name of the “Shift Left” action is not noted to the undo history.
+- [trivial] Fix an issue that the action name of the “Shift Left” action is not noted in the undo history.
 
 
 

CotEditor/Sources/Document Window/File Browser/FileBrowserViewController.swift

@@ -539,14 +539,14 @@ final class FileBrowserViewController: NSViewController, NSMenuItemValidation {
     }
 
 
-    /// Returns the target file node for the menu action.
+    /// Returns the target file nodes to perform the for the menu action.
     ///
     /// - Parameter menuItem: The sender of the action.
-    /// - Returns: A file node.
+    /// - Returns: File nodes.
     private func targetNodes(for sender: Any?) -> [FileNode] {
 
         self.targetRows(for: sender)
-            .compactMap { self.outlineView.item(atRow: $0) as? FileNode ?? self.document.fileNode }
+            .compactMap { self.outlineView.item(atRow: $0) as? FileNode }
     }
 
 
@@ -558,6 +558,10 @@ final class FileBrowserViewController: NSViewController, NSMenuItemValidation {
 
         let targetNodes = self.targetNodes(for: sender)
 
+        if targetNodes.isEmpty {
+            return self.document.fileNode
+        }
+
         guard
             targetNodes.count == 1,
             let targetNode = targetNodes.first