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/*******************************************************************************
* Copyright (c) 2000, 2006 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.cdt.internal.ui.editor;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.cdt.core.model.IWorkingCopy;
import org.eclipse.cdt.ui.IWorkingCopyManager;
import org.eclipse.cdt.ui.IWorkingCopyManagerExtension;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.Assert;
import org.eclipse.ui.IEditorInput;
/**
* This working copy manager works together with a given compilation unit document provider and
* additionally offers to "overwrite" the working copy provided by this document provider.
*/
public class WorkingCopyManager implements IWorkingCopyManager, IWorkingCopyManagerExtension {
private CDocumentProvider fDocumentProvider;
private Map<IEditorInput, IWorkingCopy> fMap;
private boolean fIsShuttingDown;
/**
* Creates a new working copy manager that co-operates with the given
* compilation unit document provider.
*
* @param provider the provider
*/
public WorkingCopyManager(CDocumentProvider provider) {
Assert.isNotNull(provider);
fDocumentProvider= provider;
}
/*
* @see org.eclipse.cdt.ui.IWorkingCopyManager#connect(org.eclipse.ui.IEditorInput)
*/
public void connect(IEditorInput input) throws CoreException {
fDocumentProvider.connect(input);
}
/*
* @see org.eclipse.cdt.ui.IWorkingCopyManager#disconnect(org.eclipse.ui.IEditorInput)
*/
public void disconnect(IEditorInput input) {
fDocumentProvider.disconnect(input);
}
/*
* @see org.eclipse.cdt.ui.IWorkingCopyManager#shutdown()
*/
public void shutdown() {
if (!fIsShuttingDown) {
fIsShuttingDown= true;
try {
if (fMap != null) {
fMap.clear();
fMap= null;
}
fDocumentProvider.shutdown();
} finally {
fIsShuttingDown= false;
}
}
}
/*
* @see org.eclipse.cdt.ui.IWorkingCopyManager#getWorkingCopy(org.eclipse.ui.IEditorInput)
*/
public IWorkingCopy getWorkingCopy(IEditorInput input) {
IWorkingCopy unit= fMap == null ? null : fMap.get(input);
return unit != null ? unit : fDocumentProvider.getWorkingCopy(input);
}
/*
* @see org.eclipse.cdt.internal.ui.editor.IWorkingCopyManagerExtension#setWorkingCopy(org.eclipse.ui.IEditorInput, org.eclipse.cdt.core.model.ITranslationUnit)
*/
public void setWorkingCopy(IEditorInput input, IWorkingCopy workingCopy) {
if (fDocumentProvider.getDocument(input) != null) {
if (fMap == null)
fMap= new HashMap<IEditorInput, IWorkingCopy>();
fMap.put(input, workingCopy);
}
}
/*
* @see org.eclipse.cdt.internal.ui.editor.IWorkingCopyManagerExtension#removeWorkingCopy(org.eclipse.ui.IEditorInput)
*/
public void removeWorkingCopy(IEditorInput input) {
fMap.remove(input);
if (fMap.isEmpty())
fMap= null;
}
}
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