taverna-file-impl/src/main/java/net/sf/taverna/t2/workbench/file/impl/actions/CloseWorkflowAction.java

/*******************************************************************************
 * Copyright (C) 2007 The University of Manchester
 *
 *  Modifications to the initial code base are copyright of their
 *  respective authors, or their employers as appropriate.
 *
 *  This program 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 2.1 of
 *  the License, or (at your option) any later version.
 *
 *  This program 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 this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 ******************************************************************************/
package net.sf.taverna.t2.workbench.file.impl.actions;

import static java.awt.Toolkit.getDefaultToolkit;
import static java.awt.event.KeyEvent.VK_C;
import static java.awt.event.KeyEvent.VK_W;
import static javax.swing.JOptionPane.CANCEL_OPTION;
import static javax.swing.JOptionPane.NO_OPTION;
import static javax.swing.JOptionPane.YES_NO_CANCEL_OPTION;
import static javax.swing.JOptionPane.YES_OPTION;
import static javax.swing.JOptionPane.showConfirmDialog;
import static javax.swing.KeyStroke.getKeyStroke;
import static net.sf.taverna.t2.workbench.icons.WorkbenchIcons.closeIcon;

import java.awt.Component;
import java.awt.event.ActionEvent;

import javax.swing.AbstractAction;

import net.sf.taverna.t2.workbench.edits.EditManager;
import net.sf.taverna.t2.workbench.file.FileManager;
import net.sf.taverna.t2.workbench.file.exceptions.UnsavedException;

import org.apache.log4j.Logger;

import org.apache.taverna.scufl2.api.container.WorkflowBundle;

@SuppressWarnings("serial")
public class CloseWorkflowAction extends AbstractAction {
	private static Logger logger = Logger.getLogger(CloseWorkflowAction.class);
	private static final String CLOSE_WORKFLOW = "Close workflow";
	private final SaveWorkflowAction saveWorkflowAction;
	private FileManager fileManager;

	public CloseWorkflowAction(EditManager editManager, FileManager fileManager) {
		super(CLOSE_WORKFLOW, closeIcon);
		this.fileManager = fileManager;
		saveWorkflowAction = new SaveWorkflowAction(editManager, fileManager);
		putValue(
				ACCELERATOR_KEY,
				getKeyStroke(VK_W, getDefaultToolkit().getMenuShortcutKeyMask()));
		putValue(MNEMONIC_KEY, VK_C);

	}
	@Override
	public void actionPerformed(ActionEvent e) {
		Component parentComponent = null;
		if (e.getSource() instanceof Component)
			parentComponent = (Component) e.getSource();
		closeWorkflow(parentComponent, fileManager.getCurrentDataflow());
	}

	public boolean closeWorkflow(Component parentComponent, WorkflowBundle workflowBundle) {
		if (workflowBundle == null) {
			logger.warn("Attempted to close a null workflow");
			return false;
		}

		try {
			return fileManager.closeDataflow(workflowBundle, true);
		} catch (UnsavedException e1) {
			fileManager.setCurrentDataflow(workflowBundle);
			String msg = "Do you want to save changes before closing the workflow "
					+ fileManager.getDataflowName(workflowBundle) + "?";
			switch (showConfirmDialog(parentComponent, msg, "Save workflow?",
					YES_NO_CANCEL_OPTION)) {
			case NO_OPTION:
				try {
					fileManager.closeDataflow(workflowBundle, false);
					return true;
				} catch (UnsavedException e2) {
					logger.error("Unexpected UnsavedException while "
							+ "closing workflow", e2);
					return false;
				}
			case YES_OPTION:
				boolean saved = saveWorkflowAction.saveDataflow(
						parentComponent, workflowBundle);
				if (!saved)
					return false;
				return closeWorkflow(parentComponent, workflowBundle);
			case CANCEL_OPTION:
			default:
				return false;
			}
		}
	}
}