/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ui.wizards.datatransfer;

import java.net.MalformedURLException;
import java.net.URL;
import java.util.List;

import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.dialogs.IDialogSettings;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.wizard.Wizard;
import org.eclipse.ui.IExportWizard;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.ide.IDE;
import org.eclipse.ui.plugin.AbstractUIPlugin;


/**
 * Standard workbench wizard for exporting resources from the workspace
 * to a zip file.
 * <p>
 * This class may be instantiated and used without further configuration;
 * this class is not intended to be subclassed.
 * </p>
 * <p>
 * Example:
 * <pre>
 * IWizard wizard = new ZipFileExportWizard();
 * wizard.init(workbench, selection);
 * WizardDialog dialog = new WizardDialog(shell, wizard);
 * dialog.open();
 * </pre>
 * During the call to <code>open</code>, the wizard dialog is presented to the
 * user. When the user hits Finish, the user-selected workspace resources 
 * are exported to the user-specified zip file, the dialog closes, and the call
 * to <code>open</code> returns.
 * </p>
  */
public class ZipFileExportWizard extends Wizard implements IExportWizard {
	private IStructuredSelection selection;
	private WizardZipFileResourceExportPage1 mainPage;
/**
 * Creates a wizard for exporting workspace resources to a zip file.
 */
public ZipFileExportWizard() {
	AbstractUIPlugin plugin = (AbstractUIPlugin) Platform.getPlugin(PlatformUI.PLUGIN_ID);
	IDialogSettings workbenchSettings = plugin.getDialogSettings();
	IDialogSettings section = workbenchSettings.getSection("ZipFileExportWizard");//$NON-NLS-1$
	if(section == null)
		section = workbenchSettings.addNewSection("ZipFileExportWizard");//$NON-NLS-1$
	setDialogSettings(section);
}
/* (non-Javadoc)
 * Method declared on IWizard.
 */
public void addPages() {
	super.addPages();
	mainPage = new WizardZipFileResourceExportPage1(selection);
	addPage(mainPage);
}
/**
 * Returns the image descriptor with the given relative path.
 */
private ImageDescriptor getImageDescriptor(String relativePath) {
	String iconPath = "icons/full/";//$NON-NLS-1$
	try {
		AbstractUIPlugin plugin = (AbstractUIPlugin) Platform.getPlugin(PlatformUI.PLUGIN_ID);
		URL installURL = plugin.getDescriptor().getInstallURL();
		URL url = new URL(installURL, iconPath + relativePath);
		return ImageDescriptor.createFromURL(url);
	}
	catch (MalformedURLException e) {
		// Should not happen
		return null;
	}
}

/* (non-Javadoc)
 * Method declared on IWorkbenchWizard.
 */
public void init(IWorkbench workbench, IStructuredSelection currentSelection) {
	this.selection = currentSelection;
	List selectedResources = IDE.computeSelectedResources(currentSelection);
	if (!selectedResources.isEmpty()) {
		this.selection = new StructuredSelection(selectedResources);
	}

	setWindowTitle(DataTransferMessages.getString("DataTransfer.export")); //$NON-NLS-1$
	setDefaultPageImageDescriptor(getImageDescriptor("wizban/exportzip_wiz.gif"));//$NON-NLS-1$
	setNeedsProgressMonitor(true);
}

/* (non-Javadoc)
 * Method declared on IWizard.
 */
public boolean performFinish() {
	return mainPage.finish();
}
}