6777156: GTK L&F: JFileChooser can jump beyond root directory in combobox and selection textarea.

src/java.desktop/share/classes/com/sun/java/swing/plaf/gtk/GTKFileChooserUI.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2002, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2002, 2022, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -980,6 +980,26 @@ protected void sort(Vector<? extends File> v) {
                 v.sort(Comparator.comparing(fsv::getSystemDisplayName));
             }
         }
+
+        @Override
+        public Vector<File> getDirectories() {
+            Vector<File> files = super.getDirectories();
+
+            /*
+             * Delete the "/.." file entry from file chooser directory list in
+             * GTK LAF if current directory is root and files vector contains
+             * "/.." entry.
+             *
+             * It is not possible to go beyond root directory.
+             */
+            File crntDir = getFileChooser().getCurrentDirectory();
+            FileSystemView fsv = getFileChooser().getFileSystemView();
+            if (crntDir != null && fsv.isFileSystemRoot(crntDir) &&
+                files.contains(new File("/.."))) {
+                    files.removeElementAt(0);
+            }
+            return files;
+        }
     }
 
     @SuppressWarnings("serial") // Superclass is not serializable across versions

test/jdk/com/sun/java/swing/plaf/gtk/TestFileChooserDirectorySelection.java

@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 6777156
+ * @library /java/awt/regtesthelpers
+ * @build PassFailJFrame
+ * @requires (os.family == "linux")
+ * @summary Verifies if user is not able to select "../" beyond
+ * root file system.
+ * @run main/manual TestFileChooserDirectorySelection
+ */
+
+import javax.swing.JFileChooser;
+import javax.swing.JFrame;
+import javax.swing.SwingUtilities;
+import javax.swing.UIManager;
+
+public class TestFileChooserDirectorySelection {
+    private static JFrame frame;
+    private static final String INSTRUCTIONS =
+            "Double click on the \"../\" entry from directory list.\n\n" +
+            "Repeat the same process till the current directory is root " +
+            "i.e \" / \" .\n\n" +
+            "If \" ../ \" option is not available at root directory" +
+            ", press Pass else Fail.";
+
+    public static void main(String[] args) throws Exception {
+        UIManager.setLookAndFeel("com.sun.java.swing.plaf.gtk.GTKLookAndFeel");
+        PassFailJFrame passFailJFrame = new PassFailJFrame(
+                "JFileChooser Test Instructions", INSTRUCTIONS, 5, 8, 35);
+        try {
+            SwingUtilities.invokeAndWait(
+                    TestFileChooserDirectorySelection::createAndShowUI);
+            passFailJFrame.awaitAndCheck();
+        } finally {
+            SwingUtilities.invokeAndWait(() -> {
+                if (frame != null) {
+                    frame.dispose();
+                }
+            });
+        }
+    }
+    private static void createAndShowUI() {
+        frame = new JFrame("Test File Chooser Directory Selection");
+        JFileChooser fileChooser = new JFileChooser();
+        fileChooser.setControlButtonsAreShown(false);
+        PassFailJFrame.addTestWindow(frame);
+        PassFailJFrame.positionTestWindow(
+                frame, PassFailJFrame.Position.HORIZONTAL);
+        frame.add(fileChooser);
+        frame.setSize(500, 500);
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        frame.setVisible(true);
+    }
+}