org.eclipse.egit.ui.internal.actions.RebaseActionHandler.java Source code

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Here is the source code for org.eclipse.egit.ui.internal.actions.RebaseActionHandler.java

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/*******************************************************************************
 * Copyright (C) 2011, 2013 Dariusz Luksza <dariusz@luksza.org> 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
 *******************************************************************************/
package org.eclipse.egit.ui.internal.actions;

import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.egit.ui.internal.commands.shared.RebaseCurrentRefCommand;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.lib.RepositoryState;

/**
 * An action to rebase the current branch on top of given branch. This is the
 * "main" action of the rebase pulldown, see {@link RebaseAction} for the menu
 * items.
 *
 * @see RebaseAction
 */
public class RebaseActionHandler extends RepositoryActionHandler {

    public Object execute(ExecutionEvent event) throws ExecutionException {
        RebaseCurrentRefCommand rebaseCurrent = new RebaseCurrentRefCommand();
        rebaseCurrent.setEnabled(event.getApplicationContext());
        // Because the enabled state is for both starting a new rebase as well
        // as working with an existing rebase, it can be that this is executed
        // even though starting a new rebase is not possible. So check enabled
        // state again here. See also isEnabled.
        if (rebaseCurrent.isEnabled())
            return rebaseCurrent.execute(event);
        else
            return null;
    }

    @Override
    public boolean isEnabled() {
        Repository repo = getRepository();
        if (repo == null)
            return false;

        // Either we want this to be enabled because a new rebase can be started
        // (main action) or an active rebase can be continued, skipped or
        // aborted (menu items). Even when the main action is not enabled we
        // must enable this because otherwise the menu items can not be opened.
        RepositoryState state = repo.getRepositoryState();
        return state.isRebasing() || RebaseCurrentRefCommand.isEnabledForState(repo, state);
    }
}