/*******************************************************************************
 * Copyright (c) 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.internal;

import java.util.HashMap;
import java.util.Map;

import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.window.WindowManager;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.application.IWorkbenchConfigurer;
import org.eclipse.ui.application.IWorkbenchWindowConfigurer;

/**
 * Internal class providing special access for configuring the workbench.
 * <p>
 * Note that these objects are only available to the main application
 * (the plug-in that creates and owns the workbench).
 * </p>
 * <p>
 * This class is not intended to be instantiated or subclassed by clients.
 * </p>
 * 
 * @since 3.0
 */
public final class WorkbenchConfigurer implements IWorkbenchConfigurer {

    /**
	 * Table to hold arbitrary key-data settings (key type: <code>String</code>,
	 * value type: <code>Object</code>).
	 * @see #setData
	 */
	private Map extraData = new HashMap();
	
	/**
	 * Indicates whether workbench state should be saved on close and 
	 * restored on subsequent open.
	 */
	private boolean saveAndRestore = false;
	
	/**
	 * Indicates whether the workbench is being force to close. During
	 * an emergency close, no interaction with the user should be done.
	 */
	private boolean isEmergencyClosing = false;
	
	/**
	 * Creates a new workbench configurer.
	 * <p>
	 * This method is declared package-private. Clients are passed an instance
	 * only via {@link WorkbenchAdvisor#initialize WorkbenchAdvisor.initialize}
	 * </p>
	 */
	/* package */ WorkbenchConfigurer() {
		super();
	}

	/* (non-javadoc)
	 * @see org.eclipse.ui.application.IWorkbenchConfigurer#getWorkbench
	 */
	public IWorkbench getWorkbench() {
		return PlatformUI.getWorkbench();
	}

	/* (non-javadoc)
	 * @see org.eclipse.ui.application.IWorkbenchConfigurer#getWorkbenchWindowManager
	 */
	public WindowManager getWorkbenchWindowManager() {
		// return the global workbench window manager
		return ((Workbench)getWorkbench()).getWindowManager();
	}	
	
	/* (non-javadoc)
	 * @see org.eclipse.ui.application.IWorkbenchConfigurer#declareImage
	 */
	public void declareImage(String symbolicName, ImageDescriptor descriptor, boolean shared) {
		if (symbolicName == null || descriptor == null) {
			throw new IllegalArgumentException();
		}
		WorkbenchImages.declareImage(symbolicName, descriptor, shared);
	}	

	/* (non-javadoc)
	 * @see org.eclipse.ui.application.IWorkbenchConfigurer#getWindowConfigurer
	 */
	public IWorkbenchWindowConfigurer getWindowConfigurer(IWorkbenchWindow window) {
		if (window == null) {
			throw new IllegalArgumentException();
		}
		return ((WorkbenchWindow) window).getWindowConfigurer();
	}


	/* (non-Javadoc)
	 * @see org.eclipse.ui.application.IWorkbenchConfigurer#getSaveAndRestore()
	 */
	public boolean getSaveAndRestore() {
		return saveAndRestore;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.ui.application.IWorkbenchConfigurer#setSaveAndRestore(boolean)
	 */
	public void setSaveAndRestore(boolean enabled) {
		saveAndRestore = enabled;
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.ui.application.IWorkbenchConfigurer#getData
	 */
	public Object getData(String key) {
		if (key == null) {
			throw new IllegalArgumentException();
		}
		return extraData.get(key);
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.ui.application.IWorkbenchConfigurer#setData(String, Object)
	 */
	public void setData(String key, Object data) {
		if (key == null) {
			throw new IllegalArgumentException();
		}
		if (data != null) {
			extraData.put(key, data);
		} else {
			extraData.remove(key);
		}
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.ui.application.IWorkbenchConfigurer#emergencyClose()
	 */
	public void emergencyClose() {
		if (!isEmergencyClosing) {
			isEmergencyClosing = true;
			if (Workbench.getInstance() != null && !Workbench.getInstance().isClosing()) {
				Workbench.getInstance().close(PlatformUI.RETURN_EMERGENCY_CLOSE, true);
			}
		}
		
	}

	/* (non-Javadoc)
	 * @see org.eclipse.ui.application.IWorkbenchConfigurer#emergencyClosing()
	 */
	public boolean emergencyClosing() {
		return isEmergencyClosing;
	}

    /* (non-Javadoc)
     * @see org.eclipse.ui.application.IWorkbenchConfigurer#restoreState()
     */
    public IStatus restoreState() {
        return ((Workbench) getWorkbench()).restoreState();
    }

    /* (non-Javadoc)
     * @see org.eclipse.ui.application.IWorkbenchConfigurer#openFirstTimeWindow()
     */
    public void openFirstTimeWindow() {
        ((Workbench) getWorkbench()).openFirstTimeWindow();
    }
}