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/*******************************************************************************
* 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
*******************************************************************************/
package org.eclipse.ui;
/**
* A page service tracks the page and perspective lifecycle events
* within a workbench window.
* <p>
* This service can be acquired from your service locator:
* <pre>
* IPageService service = (IPageService) getSite().getService(IPageService.class);
* </pre>
* <ul>
* <li>This service is not available globally, only from the workbench window level down.</li>
* </ul>
* </p>
*
* @see IWorkbenchWindow
* @see IPageListener
* @see IPerspectiveListener
* @see org.eclipse.ui.services.IServiceLocator#getService(Class)
* @noimplement This interface is not intended to be implemented by clients.
*/
public interface IPageService {
/**
* Adds the given listener for page lifecycle events.
* Has no effect if an identical listener is already registered.
* <p>
* <b>Note:</b> listeners should be removed when no longer necessary. If
* not, they will be removed when the IServiceLocator used to acquire this
* service is disposed.
* </p>
*
* @param listener a page listener
* @see #removePageListener(IPageListener)
*/
public void addPageListener(IPageListener listener);
/**
* Adds the given listener for a page's perspective lifecycle events.
* Has no effect if an identical listener is already registered.
* <p>
* <b>Note:</b> listeners should be removed when no longer necessary. If
* not, they will be removed when the IServiceLocator used to acquire this
* service is disposed.
* </p>
*
* @param listener a perspective listener
* @see #removePerspectiveListener(IPerspectiveListener)
*/
public void addPerspectiveListener(IPerspectiveListener listener);
/**
* Returns the active page.
*
* @return the active page, or <code>null</code> if no page is currently active
*/
public IWorkbenchPage getActivePage();
/**
* Removes the given page listener. Has no effect if an identical listener
* is not registered.
*
* @param listener
* a page listener
*/
public void removePageListener(IPageListener listener);
/**
* Removes the given page's perspective listener. Has no effect if an
* identical listener is not registered.
*
* @param listener
* a perspective listener
*/
public void removePerspectiveListener(IPerspectiveListener listener);
}
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