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package org.eclipse.ui;
/*
* (c) Copyright IBM Corp. 2000, 2001.
* All Rights Reserved.
*/
/**
* A view is a visual component within a workbench page. It is typically used to
* navigate a hierarchy of information (like the workspace), open an editor,
* or display properties for the active editor. Modifications made in a view are
* saved immediately (in contrast to an editor part, which conforms to a more
* elaborate open-save-close lifecycle).
* <p>
* Only one instance of a particular view type may exist within a workbench page.
* This policy is designed to simplify part management for a user.
* </p><p>
* This interface may be implemented directly. For convenience, a base
* implementation is defined in <code>ViewPart</code>.
* </p>
* <p>
* A view is added to the workbench in two steps:
* <ol>
* <li>A view extension is contributed to the workbench registry. This
* extension defines the extension id and extension class.</li>
* <li>The view is included in the default layout for a perspective.
* Alternatively, the user may open the view from the Perspective menu.</li>
* </ol>
* </p>
* <p>
* Views implement the <code>IAdaptable</code> interface; extensions
* are managed by the platform's adapter manager.
* </p>
*
* @see IWorkbenchPage#showView
* @see org.eclipse.ui.part.ViewPart
*/
public interface IViewPart extends IWorkbenchPart {
/**
* Returns the site for this view.
*
* @return the view site
*/
public IViewSite getViewSite();
/**
* Initializes this view with the given view site.
* <p>
* This method is automatically called by the workbench shortly after part
* construction. It marks the start of the views's lifecycle. Clients must
* not call this method.
* </p>
*
* @param site the view site
* @exception PartInitException if this view was not initialized successfully
*/
public void init(IViewSite site) throws PartInitException;
/**
* Initializes this view with the given view site. A memento is passed to
* the view which contains a snapshot of the views state from a previous
* session. Where possible, the view should try to recreate that state
* within the part controls.
* <p>
* This method is automatically called by the workbench shortly after part
* construction. It marks the start of the views's lifecycle. Clients must
* not call this method.
* </p>
*
* @param site the view site
* @param memento the IViewPart state or null if there is no previous saved state
* @exception PartInitException if this view was not initialized successfully
*/
public void init(IViewSite site,IMemento memento) throws PartInitException;
/**
* Saves the object state within a memento.
*
* @param memento a memento to receive the object state
*/
public void saveState(IMemento memento);
}