/*******************************************************************************
 * 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.actions;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.dialogs.IDialogSettings;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.wizard.WizardDialog;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IFileEditorInput;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.help.WorkbenchHelp;
import org.eclipse.ui.internal.IHelpContextIds;
import org.eclipse.ui.internal.WorkbenchMessages;
import org.eclipse.ui.internal.WorkbenchPlugin;
import org.eclipse.ui.internal.dialogs.NewWizard;

/**
 * Invoke the resource creation wizard selection Wizard.
 * <p>
 * This class may be instantiated; it is not intended to be subclassed.
 * </p>
 */
public class NewWizardAction extends Action {

	/**
	 * The wizard dialog width
	 */
	private static final int SIZING_WIZARD_WIDTH = 500;

	/**
	 * The wizard dialog height
	 */
	private static final int SIZING_WIZARD_HEIGHT = 500;

	/**
	 * The id of the category to show or <code>null</code> to
	 * show all the categories.
	 */
	private String categoryId = null;
	
	/**
	 * The workbench window this action will work within.
	 */
	private IWorkbenchWindow window;
	
	/**
	 *	Create a new instance of this class
	 */
	public NewWizardAction(IWorkbenchWindow window) {
		super(WorkbenchMessages.getString("NewWizardAction.text")); //$NON-NLS-1$
		this.window = window;
		ISharedImages images = PlatformUI.getWorkbench().getSharedImages();
		setImageDescriptor(images.getImageDescriptor(ISharedImages.IMG_TOOL_NEW_WIZARD));
		setHoverImageDescriptor(images.getImageDescriptor(ISharedImages.IMG_TOOL_NEW_WIZARD_HOVER));
		setDisabledImageDescriptor(images.getImageDescriptor(ISharedImages.IMG_TOOL_NEW_WIZARD_DISABLED));
		setToolTipText(WorkbenchMessages.getString("NewWizardAction.toolTip")); //$NON-NLS-1$
		WorkbenchHelp.setHelp(this, IHelpContextIds.NEW_ACTION);
		setActionDefinitionId("org.eclipse.ui.newWizard"); //$NON-NLS-1$
	}
	
	/**
	 * Create a new instance of this class
	 * 
	 * @deprecated use the constructor <code>NewWizardAction(IWorkbenchWindow)</code>
	 */
	public NewWizardAction() {
		this(PlatformUI.getWorkbench().getActiveWorkbenchWindow());
	}
	
	/**
	 * Returns the id of the category of wizards to show
	 * or <code>null</code> to show all categories.
	 */
	public String getCategoryId() {
		return categoryId;
	}
	/**
	 * Sets the id of the category of wizards to show
	 * or <code>null</code> to show all categories.
	 */
	public void setCategoryId(String id) {
		categoryId = id;
	}
	/* (non-Javadoc)
	 * Method declared on IAction.
	 */
	public void run() {
		NewWizard wizard = new NewWizard();
		wizard.setCategoryId(categoryId);

		ISelection selection = window.getSelectionService().getSelection();
		IStructuredSelection selectionToPass = StructuredSelection.EMPTY;
		if (selection instanceof IStructuredSelection) {
			selectionToPass = (IStructuredSelection) selection;
		} else {
			// Build the selection from the IFile of the editor
			IWorkbenchPart part = window.getPartService().getActivePart();
			if (part instanceof IEditorPart) {
				IEditorInput input = ((IEditorPart) part).getEditorInput();
				if (input instanceof IFileEditorInput) {
					selectionToPass = new StructuredSelection(((IFileEditorInput) input).getFile());
				}
			}
		}

		wizard.init(window.getWorkbench(), selectionToPass);
		IDialogSettings workbenchSettings = WorkbenchPlugin.getDefault().getDialogSettings();
		IDialogSettings wizardSettings = workbenchSettings.getSection("NewWizardAction"); //$NON-NLS-1$
		if (wizardSettings == null)
			wizardSettings = workbenchSettings.addNewSection("NewWizardAction"); //$NON-NLS-1$
		wizard.setDialogSettings(wizardSettings);
		wizard.setForcePreviousAndNextButtons(true);

		Shell parent = window.getShell();
		WizardDialog dialog = new WizardDialog(parent, wizard);
		dialog.create();
		dialog.getShell().setSize(Math.max(SIZING_WIZARD_WIDTH, dialog.getShell().getSize().x), SIZING_WIZARD_HEIGHT);
		WorkbenchHelp.setHelp(dialog.getShell(), IHelpContextIds.NEW_WIZARD);
		dialog.open();
	}
}