ActionWithFallback.java

/**
 * Copyright 2004-2016 Riccardo Solmi. All rights reserved.
 * This file is part of the Whole Platform.
 *
 * The Whole Platform is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * The Whole Platform 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the Whole Platform. If not, see <http://www.gnu.org/licenses/>.
 */
package org.whole.lang.e4.ui.actions;

import org.eclipse.e4.core.contexts.IEclipseContext;
import org.whole.lang.ui.actions.IUpdatableAction;

/**
 * @author Enrico Persiani
 */
public class ActionWithFallback extends AbstractE4Action {
	private final IUpdatableAction baseAction;
	private final IUpdatableAction fallbackAction;

	public ActionWithFallback(IEclipseContext context, IUpdatableAction baseAction, IUpdatableAction fallbackAction) {
		super(context);
		this.baseAction = baseAction;
		this.fallbackAction = fallbackAction;
	}

	@Override
	public void update() {
		baseAction.update();
		if (!baseAction.isEnabled())
			fallbackAction.update();
	}

	@Override
	public boolean isEnabled() {
		return baseAction.isEnabled() || fallbackAction.isEnabled();
	}

	@Override
	public void run() {
		if (baseAction.isEnabled())
			baseAction.run();
		else
			fallbackAction.run();
	}
}