/*******************************************************************************
 * Copyright (c) 2000, 2008 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *     Anton Leherbauer (Wind River Systems)
 *******************************************************************************/
package org.eclipse.cdt.internal.ui.wizards.filewizard;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.dialogs.ErrorDialog;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.dialogs.WizardNewFileCreationPage;
import org.eclipse.ui.ide.IDE;
import org.eclipse.ui.wizards.newresource.BasicNewResourceWizard;

import org.eclipse.cdt.internal.ui.CPluginImages;

/**
 * A generic new file wizard with support for file templates.
 * Based on {@link org.eclipse.ui.wizards.newresource.BasicNewFileResourceWizard BasicNewFileResourceWizard}.
 *
 * @since 5.0
 */
public class NewFileFromTemplateWizard extends BasicNewResourceWizard {
    private WizardNewFileCreationPage mainPage;

    /**
     * Creates a wizard for creating a new file resource in the workspace.
     */
    public NewFileFromTemplateWizard() {
        super();
    }

    /*
     * Method declared on IWizard.
     */
    @Override
	public void addPages() {
        super.addPages();
        mainPage = new WizardNewFileFromTemplateCreationPage("newFilePage1", getSelection());//$NON-NLS-1$
        mainPage.setTitle(NewFileWizardMessages.NewFileFromTemplateWizard_pageTitle);
        mainPage.setDescription(NewFileWizardMessages.NewFileFromTemplateWizard_description); 
        addPage(mainPage);
    }

    /*
     * Method declared on IWorkbenchWizard.
     */
    @Override
	public void init(IWorkbench workbench, IStructuredSelection currentSelection) {
        super.init(workbench, currentSelection);
        setWindowTitle(NewFileWizardMessages.NewFileFromTemplateWizard_shellTitle);
        setNeedsProgressMonitor(true);
    }

    /*
     * Method declared on BasicNewResourceWizard.
     */
    @Override
	protected void initializeDefaultPageImageDescriptor() {
       ImageDescriptor desc = CPluginImages.DESC_WIZBAN_NEW_FILE;
	   setDefaultPageImageDescriptor(desc);
    }

    /*
     * Method declared on IWizard.
     */
    @Override
	public boolean performFinish() {
        IFile file = mainPage.createNewFile();
        if (file == null) {
			return false;
		}

        selectAndReveal(file);

        // Open editor on new file.
        IWorkbenchWindow dw = getWorkbench().getActiveWorkbenchWindow();
        try {
            if (dw != null) {
                IWorkbenchPage page = dw.getActivePage();
                if (page != null) {
                    IDE.openEditor(page, file, true);
                }
            }
        } catch (PartInitException e) {
            openError(getShell(), NewFileWizardMessages.NewFileFromTemplateWizard_errorMessage, e.getMessage(), e);
        }

        return true;
    }

    /**
     * Open an error style dialog for PartInitException by
     * including any extra information from the nested
     * CoreException if present.
     */
    public static void openError(Shell parent, String title, String message,
            PartInitException exception) {
        // Check for a nested CoreException
        CoreException nestedException = null;
        IStatus status = exception.getStatus();
        if (status != null && status.getException() instanceof CoreException) {
			nestedException = (CoreException) status.getException();
		}

        if (nestedException != null) {
            // Open an error dialog and include the extra
            // status information from the nested CoreException
            ErrorDialog.openError(parent, title, message, nestedException
                    .getStatus());
        } else {
            // Open a regular error dialog since there is no
            // extra information to display
            MessageDialog.openError(parent, title, message);
        }
    }
}