bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/PartPluginAction.java

/************************************************************************
Copyright (c) 2000, 2002 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 - Initial implementation
************************************************************************/

package org.eclipse.ui.internal;

import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.ui.*;
import org.eclipse.jface.viewers.*;

/**
 * This class adds to the PluginAction support by
 * setting itself up for work within a WorkbenchPart.
 * The main difference is that it is capable of
 * processing local selection changes within a part.
 */
public class PartPluginAction extends PluginAction {
	/**
	 * PartPluginAction constructor.
	 *
	 */
	public PartPluginAction(IConfigurationElement actionElement, String runAttribute, String definitionId, int style) {
		super(actionElement, runAttribute, definitionId, style);
	}
	/**
	 * Registers this action as a listener of the workbench part.
	 */
	protected void registerSelectionListener(IWorkbenchPart aPart) {
		ISelectionProvider selectionProvider = aPart.getSite().getSelectionProvider();
		if (selectionProvider != null) {
			selectionProvider.addSelectionChangedListener(this);
			selectionChanged(selectionProvider.getSelection());
		}
	}
	/**
	 * Unregisters this action as a listener of the workbench part.
	 */
	protected void unregisterSelectionListener(IWorkbenchPart aPart) {
		ISelectionProvider selectionProvider = aPart.getSite().getSelectionProvider();
		if (selectionProvider != null) {
			selectionProvider.removeSelectionChangedListener(this);
		}
	}
	/**
	 * Refresh the selection.
	 */
	protected void refreshSelection(IWorkbenchPart aPart) {
		ISelectionProvider selectionProvider = aPart.getSite().getSelectionProvider();
		if (selectionProvider != null)
			selectionChanged(selectionProvider.getSelection());
	}

}