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/*******************************************************************************
* Copyright (c) 2007, 2017 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.compare.internal;
import org.eclipse.compare.CompareConfiguration;
import org.eclipse.compare.structuremergeviewer.ICompareInput;
import org.eclipse.core.runtime.*;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.widgets.Composite;
/**
* Class which allows content merge viewer to provide a structure viewer that can be used in the outline
* view.
*/
public abstract class OutlineViewerCreator {
/**
* Property constant that identifies the input of the outline view.
*/
public static final String PROP_INPUT = "org.eclipse.compare.OutlineInput"; //$NON-NLS-1$
private ListenerList<IPropertyChangeListener> listeners = new ListenerList<>(ListenerList.IDENTITY);
/**
* Method called by the editor to create a structure viewer for the current content merge viewer.
* @param oldViewer the current viewer that is being used to show the structure
* @param input the input
* @param parent the parent composite
* @param configuration the compare configuration
* @return a viewer to be placed in the outline viewer or <code>null</code>
*/
public abstract Viewer findStructureViewer(Viewer oldViewer, ICompareInput input,
Composite parent, CompareConfiguration configuration);
public abstract boolean hasViewerFor(Object input);
public void addPropertyChangeListener(IPropertyChangeListener listener) {
listeners.add(listener);
}
public void removePropertyChangeListener(IPropertyChangeListener listener) {
listeners.remove(listener);
}
public void fireInputChange(Object oldInput, Object newInput) {
final PropertyChangeEvent event = new PropertyChangeEvent(this, PROP_INPUT, oldInput, newInput);
for (final IPropertyChangeListener listener : listeners) {
SafeRunner.run(new ISafeRunnable() {
@Override
public void run() throws Exception {
listener.propertyChange(event);
}
@Override
public void handleException(Throwable exception) {
// Logged by SafeRunner
}
});
}
}
public abstract Object getInput();
}
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