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/*******************************************************************************
* Copyright (c) 2007, 2008 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jface.text;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Shell;
/**
* Abstract class for a reusable information control creators.
*
* @since 3.3
*/
public abstract class AbstractReusableInformationControlCreator implements IInformationControlCreator, IInformationControlCreatorExtension, DisposeListener {
private Map<Shell, IInformationControl> fInformationControls= new HashMap<>();
/**
* Creates the control.
*
* @param parent the parent shell
* @return the created information control
*/
protected abstract IInformationControl doCreateInformationControl(Shell parent);
@Override
public IInformationControl createInformationControl(Shell parent) {
IInformationControl control= fInformationControls.get(parent);
if (control == null) {
control= doCreateInformationControl(parent);
control.addDisposeListener(this);
fInformationControls.put(parent, control);
}
return control;
}
@Override
public void widgetDisposed(DisposeEvent e) {
Composite parent= null;
if (e.widget instanceof Shell)
parent= ((Shell)e.widget).getParent();
if (parent instanceof Shell)
fInformationControls.remove(parent);
}
@Override
public boolean canReuse(IInformationControl control) {
return fInformationControls.containsValue(control);
}
@Override
public boolean canReplace(IInformationControlCreator creator) {
return creator.getClass() == getClass();
}
}
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