| /******************************************************************************* |
| * Copyright (c) 2007, 2011 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.compare.internal; |
| |
| import org.eclipse.jface.action.Action; |
| import org.eclipse.jface.action.IAction; |
| import org.eclipse.jface.preference.IPreferenceStore; |
| import org.eclipse.jface.util.IPropertyChangeListener; |
| import org.eclipse.jface.util.PropertyChangeEvent; |
| import org.eclipse.ui.editors.text.EditorsUI; |
| |
| public class TextEditorPropertyAction extends Action implements IPropertyChangeListener { |
| |
| private final MergeSourceViewer[] viewers; |
| private final String preferenceKey; |
| private IPreferenceStore store; |
| |
| public TextEditorPropertyAction(String label, MergeSourceViewer[] viewers, String preferenceKey) { |
| super(label, IAction.AS_CHECK_BOX); |
| this.viewers = viewers; |
| this.preferenceKey = preferenceKey; |
| this.store = EditorsUI.getPreferenceStore(); |
| if (store != null) |
| store.addPropertyChangeListener(this); |
| synchronizeWithPreference(); |
| addActionToViewers(); |
| } |
| |
| private void addActionToViewers() { |
| for (int i = 0; i < viewers.length; i++) { |
| MergeSourceViewer viewer = viewers[i]; |
| viewer.addTextAction(this); |
| } |
| } |
| |
| public MergeSourceViewer[] getViewers() { |
| return viewers; |
| } |
| |
| public void propertyChange(PropertyChangeEvent event) { |
| if (event.getProperty().equals(getPreferenceKey())) { |
| synchronizeWithPreference(); |
| } |
| } |
| |
| protected void synchronizeWithPreference() { |
| boolean checked = false; |
| if (store != null) { |
| checked = store.getBoolean(getPreferenceKey()); |
| } |
| if (checked != isChecked()) { |
| if (toggleState(checked)) |
| setChecked(checked); |
| } |
| } |
| |
| public String getPreferenceKey() { |
| return preferenceKey; |
| } |
| |
| public void run() { |
| toggleState(isChecked()); |
| if (store != null) |
| store.setValue(getPreferenceKey(), isChecked()); |
| } |
| |
| public void dispose() { |
| if (store != null) |
| store.removePropertyChangeListener(this); |
| } |
| |
| /** |
| * @param checked |
| * new state |
| * @return <code>true</code> if state has been changed, toggle has been |
| * successful |
| */ |
| protected boolean toggleState(boolean checked) { |
| // No-op by default |
| return false; |
| } |
| |
| } |