/*
* Copyright 2000-2007 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.intellij.ui;
import com.intellij.openapi.Disposable;
import com.intellij.openapi.actionSystem.KeyboardShortcut;
import com.intellij.openapi.actionSystem.Shortcut;
import com.intellij.openapi.keymap.KeymapManager;
import javax.swing.*;
import javax.swing.event.UndoableEditEvent;
import javax.swing.event.UndoableEditListener;
import javax.swing.text.JTextComponent;
import javax.swing.text.Keymap;
import javax.swing.undo.UndoManager;
import java.awt.event.ActionEvent;
/**
* @author yole
*/
public class TextComponentUndoProvider implements Disposable {
private JTextComponent myTextComponent;
private UndoManager myUndoManager = new UndoManager();
private UndoableEditListener myUndoableEditListener;
private Keymap myOldKeymap;
public TextComponentUndoProvider(final JTextComponent textComponent) {
myTextComponent = textComponent;
myUndoableEditListener = new UndoableEditListener() {
public void undoableEditHappened(UndoableEditEvent e) {
myUndoManager.addEdit(e.getEdit());
}
};
myTextComponent.getDocument().addUndoableEditListener(myUndoableEditListener);
myOldKeymap = myTextComponent.getKeymap();
Keymap keymap = JTextComponent.addKeymap(null, myOldKeymap);
com.intellij.openapi.keymap.Keymap activeKeymap = KeymapManager.getInstance().getActiveKeymap();
Shortcut[] undoShortcuts = activeKeymap.getShortcuts("$Undo");
Shortcut[] redoShortcuts = activeKeymap.getShortcuts("$Redo");
Action undoAction = new AbstractAction ("Undo") {
public void actionPerformed(ActionEvent e) {
if (myUndoManager.canUndo())
myUndoManager.undo();
}
};
Action redoAction = new AbstractAction ("Redo") {
public void actionPerformed(ActionEvent e) {
if (myUndoManager.canRedo())
myUndoManager.redo();
}
};
for (Shortcut undoShortcut : undoShortcuts) {
if (undoShortcut instanceof KeyboardShortcut) {
keymap.addActionForKeyStroke(((KeyboardShortcut)undoShortcut).getFirstKeyStroke(), undoAction);
}
}
for (Shortcut redoShortcut : redoShortcuts) {
if (redoShortcut instanceof KeyboardShortcut) {
keymap.addActionForKeyStroke(((KeyboardShortcut)redoShortcut).getFirstKeyStroke(), redoAction);
}
}
myTextComponent.setKeymap(keymap);
}
public void dispose() {
if (myUndoableEditListener != null) {
myTextComponent.getDocument().removeUndoableEditListener(myUndoableEditListener);
myUndoableEditListener = null;
}
if (myOldKeymap != null) {
myTextComponent.setKeymap(myOldKeymap);
myOldKeymap = null;
}
}
}