ecommons/org.eclipse.statet.ecommons.uimisc/src/org/eclipse/statet/ecommons/ui/util/AbstractPostSelectionProvider.java

/*=============================================================================#
 # Copyright (c) 2012, 2021 Stephan Wahlbrink and others.
 # 
 # This program and the accompanying materials are made available under the
 # terms of the Eclipse Public License 2.0 which is available at
 # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
 # which is available at https://www.apache.org/licenses/LICENSE-2.0.
 # 
 # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
 # 
 # Contributors:
 #     Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation
 #=============================================================================*/

package org.eclipse.statet.ecommons.ui.util;

import org.eclipse.jface.util.SafeRunnable;
import org.eclipse.jface.viewers.IPostSelectionProvider;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.SelectionChangedEvent;

import org.eclipse.statet.ecommons.collections.FastList;


public abstract class AbstractPostSelectionProvider implements IPostSelectionProvider {
	
	
	private final FastList<ISelectionChangedListener> fSelectionListeners= new FastList<>(ISelectionChangedListener.class);
	private final FastList<ISelectionChangedListener> fPostSelectionListeners= new FastList<>(ISelectionChangedListener.class);
	
	
	public AbstractPostSelectionProvider() {
	}
	
	
	@Override
	public void addSelectionChangedListener(final ISelectionChangedListener listener) {
		fSelectionListeners.add(listener);
	}
	
	@Override
	public void removeSelectionChangedListener(final ISelectionChangedListener listener) {
		fSelectionListeners.remove(listener);
	}
	
	
	@Override
	public void addPostSelectionChangedListener(final ISelectionChangedListener listener) {
		fPostSelectionListeners.add(listener);
	}
	
	@Override
	public void removePostSelectionChangedListener(final ISelectionChangedListener listener) {
		fPostSelectionListeners.remove(listener);
	}
	
	
	protected void fireSelectionChanged(final SelectionChangedEvent event) {
		final ISelectionChangedListener[] listeners = fSelectionListeners.toArray();
		for (int i = 0; i < listeners.length; i++) {
			final ISelectionChangedListener l = listeners[i];
			SafeRunnable.run(new SafeRunnable() {
				@Override
				public void run() {
					l.selectionChanged(event);
				}
			});
		}
	}
	
	protected void firePostSelectionChanged(final SelectionChangedEvent event) {
		final ISelectionChangedListener[] listeners = fPostSelectionListeners.toArray();
		for (int i = 0; i < listeners.length; i++) {
			final ISelectionChangedListener l = listeners[i];
			SafeRunnable.run(new SafeRunnable() {
				@Override
				public void run() {
					l.selectionChanged(event);
				}
			});
		}
	}
	
}