Swing/CellEditorPopupMenu のバックアップの現在との差分(No.19)

#spandel
public static JPopupMenu installTextComponentPopupMenu(final JTextComponent tc) {
#spanend
  final UndoManager manager = new UndoManager();
  final Action undoAction   = new UndoAction(manager);
  final Action redoAction   = new RedoAction(manager);
  final Action cutAction    = new DefaultEditorKit.CutAction();
  final Action copyAction   = new DefaultEditorKit.CopyAction();
  final Action pasteAction  = new DefaultEditorKit.PasteAction();
  final Action deleteAction = new AbstractAction("delete") {
    @Override public void actionPerformed(ActionEvent e) {
      ((JTextComponent) getInvoker()).replaceSelection(null);
    }
  };
  tc.addAncestorListener(new AncestorListener() {
    @Override public void ancestorAdded(AncestorEvent e) {
      manager.discardAllEdits();
      tc.requestFocusInWindow();
    }
    @Override public void ancestorMoved(AncestorEvent e) {}
    @Override public void ancestorRemoved(AncestorEvent e) {}
  });
  tc.getDocument().addUndoableEditListener(manager);
  tc.getActionMap().put("undo", undoAction);
  tc.getActionMap().put("redo", redoAction);
  InputMap imap = tc.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
  imap.put(KeyStroke.getKeyStroke(
    KeyEvent.VK_Z, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()), "undo");
  imap.put(KeyStroke.getKeyStroke(
    KeyEvent.VK_Y, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()), "redo");
#spanadd
class TextComponentPopupMenu extends JPopupMenu {
#spanend
  protected TextComponentPopupMenu(JTextComponent tc) {
    super();
    Action cutAction = new DefaultEditorKit.CutAction();
    add(cutAction);
    Action copyAction = new DefaultEditorKit.CopyAction();
    add(copyAction);
    Action pasteAction = new DefaultEditorKit.PasteAction();
    add(pasteAction);
    Action deleteAction = new DeleteAction();
    add(deleteAction);
    addSeparator();

  JPopupMenu popup = new JPopupMenu();
  popup.add(cutAction);
  popup.add(copyAction);
  popup.add(pasteAction);
  popup.add(deleteAction);
  popup.addSeparator();
  popup.add(undoAction);
  popup.add(redoAction);
    UndoManager manager = new UndoManager();
    Action undoAction = new UndoAction(manager);
    add(undoAction);

  popup.addPopupMenuListener(new PopupMenuListener() {
    @Override public void popupMenuCanceled(PopupMenuEvent e) {}
    @Override public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
      undoAction.setEnabled(true);
      redoAction.setEnabled(true);
    }
    @Override public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
      JPopupMenu pop = (JPopupMenu) e.getSource();
      JTextField field = (JTextField) pop.getInvoker();
      boolean flg = field.getSelectedText() != null;
      cutAction.setEnabled(flg);
      copyAction.setEnabled(flg);
      deleteAction.setEnabled(flg);
      undoAction.setEnabled(manager.canUndo());
      redoAction.setEnabled(manager.canRedo());
    }
  });
  tc.setComponentPopupMenu(popup);
  return popup;
    Action redoAction = new RedoAction(manager);
    add(redoAction);
#spanadd

#spanend
    tc.addAncestorListener(new AncestorListener() {
      @Override public void ancestorAdded(AncestorEvent e) {
        manager.discardAllEdits();
        e.getComponent().requestFocusInWindow();
      }
#spanadd

#spanend
      @Override public void ancestorMoved(AncestorEvent e) {
        /* not needed */
      }
#spanadd

#spanend
      @Override public void ancestorRemoved(AncestorEvent e) {
        /* not needed */
      }
    });
    tc.getDocument().addUndoableEditListener(manager);
    tc.getActionMap().put("undo", undoAction);
    tc.getActionMap().put("redo", redoAction);
    InputMap im = tc.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
    int mask = Toolkit.getDefaultToolkit().getMenuShortcutKeyMask();
    // Java 10: int mask = Toolkit.getDefaultToolkit().getMenuShortcutKeyMaskEx();
    im.put(KeyStroke.getKeyStroke(KeyEvent.VK_Z, mask), "undo");
    im.put(KeyStroke.getKeyStroke(KeyEvent.VK_Y, mask), "redo");
#spanadd

#spanend
    addPopupMenuListener(new PopupMenuListener() {
      @Override public void popupMenuCanceled(PopupMenuEvent e) {
        /* not needed */
      }
#spanadd

#spanend
      @Override public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
        undoAction.setEnabled(true);
        redoAction.setEnabled(true);
      }
#spanadd

#spanend
      @Override public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
        JTextComponent tc = (JTextComponent) getInvoker();
        boolean hasSelectedText = Objects.nonNull(tc.getSelectedText());
        cutAction.setEnabled(hasSelectedText);
        copyAction.setEnabled(hasSelectedText);
        deleteAction.setEnabled(hasSelectedText);
        undoAction.setEnabled(manager.canUndo());
        redoAction.setEnabled(manager.canRedo());
      }
    });
  }
}