/*******************************************************************************
* Copyright (c) 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.erlide.ui.editors.erl;
import org.eclipse.core.runtime.ListenerList;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
import org.erlide.ui.actions.SelectionDispatchAction;
/**
* A simple default implementation of a {@link ISelectionProvider}. It stores
* the selection and notifies all selection change listeners when the selection
* is set.
*
* Instances of this class can be used as special selection provider for
* {@link SelectionDispatchAction}s
*
*/
public class SimpleSelectionProvider implements ISelectionProvider {
private final ListenerList fSelectionChangedListeners;
private ISelection fSelection;
/**
* Create a new SimpleSelectionProvider
*/
public SimpleSelectionProvider() {
fSelectionChangedListeners = new ListenerList();
}
@Override
public ISelection getSelection() {
return fSelection;
}
@Override
public void setSelection(final ISelection selection) {
fSelection = selection;
final Object[] listeners = fSelectionChangedListeners.getListeners();
for (int i = 0; i < listeners.length; i++) {
((ISelectionChangedListener) listeners[i])
.selectionChanged(new SelectionChangedEvent(this, selection));
}
}
@Override
public void removeSelectionChangedListener(final ISelectionChangedListener listener) {
fSelectionChangedListeners.remove(listener);
}
@Override
public void addSelectionChangedListener(final ISelectionChangedListener listener) {
fSelectionChangedListeners.add(listener);
}
}