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/*******************************************************************************
 *  Copyright (c) 2011, 2012 GitHub Inc. 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:
 *    Kevin Sawicki (GitHub Inc.) - initial API and implementation
 *    Benjamin Muskalla (Tasktop Technologies Inc.) - support for model scoping
 *******************************************************************************/
package org.eclipse.egit.ui.internal.actions;

import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.OperationCanceledException;
import org.eclipse.egit.ui.internal.dialogs.ReplaceTargetSelectionDialog;
import org.eclipse.jface.window.Window;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.swt.widgets.Shell;

/**
 * Replace with ref action handler
 */
public class ReplaceWithRefActionHandler extends DiscardChangesActionHandler {

	@Override
	protected String gatherRevision(ExecutionEvent event)
			throws ExecutionException {
		final IResource[] resources = getSelectedResources(event);
		Shell shell = getShell(event);
		Repository repository = getRepository(true, event);
		final String resourceName = resources.length == 1 ? resources[0].getFullPath()
				.lastSegment() : null;
		ReplaceTargetSelectionDialog dlg = new ReplaceTargetSelectionDialog(
				shell, repository, resourceName);
		if (dlg.open() == Window.OK)
			return dlg.getRefName();
		else
			throw new OperationCanceledException();
	}

}