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/*******************************************************************************
* Copyright (c) 2001, 2007 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.wst.xsd.ui.internal.adt.outline;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.wst.xsd.ui.internal.adt.facade.IADTObject;
import org.eclipse.wst.xsd.ui.internal.adt.facade.IADTObjectListener;
public class ADTContentOutlineProvider implements ITreeContentProvider, IADTObjectListener
{
protected Viewer viewer = null;
protected Object oldInput, newInput;
public ADTContentOutlineProvider()
{
super();
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)
*/
public Object[] getChildren(Object parentElement)
{
if (parentElement instanceof ITreeElement)
{
Object[] children = ((ITreeElement) parentElement).getChildren();
if (children != null)
{
int length = children.length;
for (int i = 0; i < length; i++)
{
Object child = children[i];
if (child instanceof IADTObject)
{
((IADTObject) child).registerListener(this);
}
}
}
return children;
}
return null;
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
*/
public Object getParent(Object element)
{
return null;
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
*/
public boolean hasChildren(Object element)
{
if (element instanceof ITreeElement)
{
return ((ITreeElement) element).hasChildren();
}
return false;
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
*/
public Object[] getElements(Object inputElement)
{
return getChildren(inputElement);
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.IContentProvider#dispose()
*/
public void dispose()
{
Object input = viewer.getInput();
if (input instanceof IADTObject)
{
removeListener((IADTObject) input);
}
}
/* (non-Javadoc)
* @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
*/
public void inputChanged(Viewer viewer, Object oldInput, Object newInput)
{
this.viewer = viewer;
this.oldInput = oldInput;
this.newInput = newInput;
}
/* (non-Javadoc)
* @see org.eclipse.wst.xsd.ui.internal.adt.facade.IADTObjectListener#propertyChanged(java.lang.Object, java.lang.String)
*/
public void propertyChanged(Object object, String property)
{
if (viewer instanceof TreeViewer)
{
TreeViewer treeViewer = (TreeViewer) viewer;
if (treeViewer.getTree() != null && !treeViewer.getTree().isDisposed())
{
treeViewer.refresh(object);
treeViewer.reveal(object);
}
}
}
/**
* @param model
*/
private void removeListener(IADTObject model)
{
model.unregisterListener(this);
Object[] children = getChildren(model);
if (children != null)
{
int length = children.length;
for (int i = 0; i < length; i++)
{
Object child = children[i];
if (child instanceof IADTObject)
{
removeListener((IADTObject) child);
}
}
}
}
}
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