/*******************************************************************************
 * Copyright (c) 2000, 2005 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
 *******************************************************************************/
package org.eclipse.ui.wizards.newresource;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.eclipse.core.resources.IResource;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.wizard.Wizard;
import org.eclipse.ui.INewWizard;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchPartReference;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin;
import org.eclipse.ui.part.ISetSelectionTarget;

/**
 * Abstract base implementation of the standard workbench wizards
 * that create new resources in the workspace.
 * <p>
 * This class is not intended to be subclassed outside this package.
 * </p>
 */
public abstract class BasicNewResourceWizard extends Wizard implements
        INewWizard {

    /**
     * The workbench.
     */
    private IWorkbench workbench;

    /**
     * The current selection.
     */
    protected IStructuredSelection selection;

    /**
     * Creates an empty wizard for creating a new resource in the workspace.
     */
    protected BasicNewResourceWizard() {
        super();
    }

    /**
     * Returns the selection which was passed to <code>init</code>.
     *
     * @return the selection
     */
    public IStructuredSelection getSelection() {
        return selection;
    }

    /**
     * Returns the workbench which was passed to <code>init</code>.
     *
     * @return the workbench
     */
    public IWorkbench getWorkbench() {
        return workbench;
    }

    /**
     * The <code>BasicNewResourceWizard</code> implementation of this 
     * <code>IWorkbenchWizard</code> method records the given workbench and
     * selection, and initializes the default banner image for the pages
     * by calling <code>initializeDefaultPageImageDescriptor</code>.
     * Subclasses may extend.
     */
    public void init(IWorkbench workbench, IStructuredSelection currentSelection) {
        this.workbench = workbench;
        this.selection = currentSelection;

        initializeDefaultPageImageDescriptor();
    }

    /**
     * Initializes the default page image descriptor to an appropriate banner.
     * By calling <code>setDefaultPageImageDescriptor</code>.
     * The default implementation of this method uses a generic new wizard image.
     * <p>
     * Subclasses may reimplement.
     * </p>
     */
    protected void initializeDefaultPageImageDescriptor() {
		ImageDescriptor desc = IDEWorkbenchPlugin.getIDEImageDescriptor("wizban/new_wiz.gif");//$NON-NLS-1$
        setDefaultPageImageDescriptor(desc);
    }

    /**
     * Selects and reveals the newly added resource in all parts
     * of the active workbench window's active page.
     *
     * @see ISetSelectionTarget
     */
    protected void selectAndReveal(IResource newResource) {
        selectAndReveal(newResource, getWorkbench().getActiveWorkbenchWindow());
    }

    /**
     * Attempts to select and reveal the specified resource in all
     * parts within the supplied workbench window's active page.
     * <p>
     * Checks all parts in the active page to see if they implement <code>ISetSelectionTarget</code>,
     * either directly or as an adapter. If so, tells the part to select and reveal the
     * specified resource.
     * </p>
     *
     * @param resource the resource to be selected and revealed
     * @param window the workbench window to select and reveal the resource
     * 
     * @see ISetSelectionTarget
     */
    public static void selectAndReveal(IResource resource,
            IWorkbenchWindow window) {
        // validate the input
        if (window == null || resource == null)
            return;
        IWorkbenchPage page = window.getActivePage();
        if (page == null)
            return;

        // get all the view and editor parts
        List parts = new ArrayList();
        IWorkbenchPartReference refs[] = page.getViewReferences();
        for (int i = 0; i < refs.length; i++) {
            IWorkbenchPart part = refs[i].getPart(false);
            if (part != null)
                parts.add(part);
        }
        refs = page.getEditorReferences();
        for (int i = 0; i < refs.length; i++) {
            if (refs[i].getPart(false) != null)
                parts.add(refs[i].getPart(false));
        }

        final ISelection selection = new StructuredSelection(resource);
        Iterator itr = parts.iterator();
        while (itr.hasNext()) {
            IWorkbenchPart part = (IWorkbenchPart) itr.next();

            // get the part's ISetSelectionTarget implementation
            ISetSelectionTarget target = null;
            if (part instanceof ISetSelectionTarget)
                target = (ISetSelectionTarget) part;
            else
                target = (ISetSelectionTarget) part
                        .getAdapter(ISetSelectionTarget.class);

            if (target != null) {
                // select and reveal resource
                final ISetSelectionTarget finalTarget = target;
                window.getShell().getDisplay().asyncExec(new Runnable() {
                    public void run() {
                        finalTarget.selectReveal(selection);
                    }
                });
            }
        }
    }
}