/*
* Created on Feb 27, 2004
*
* The MIT License
* Copyright (c) 2004 Rob Rohan
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the Software
* is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package org.cfeclipse.cfml.views.contentoutline;
/**
* @author Rob
*
* To change the template for this generated type comment go to
* Window - Preferences - Java - Code Generation - Code and Comments
*
* This class was influenced by the aricle:
* How to use the JFace Tree Viewer
* By Chris Grindstaff, Applied Reasoning (chrisg at appliedReasoning.com)
* May 5, 2002
*/
//import org.eclipse.core.internal.runtime.Assert;
import org.cfeclipse.cfml.parser.docitems.DocItem;
import org.eclipse.jface.viewers.IContentProvider;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
public class OutlineContentProvider implements ITreeContentProvider { //, IDeltaListener {
/** scratch pad */
private static Object[] EMPTY_ARRAY = new Object[0];
protected TreeViewer viewer;
protected DocItem rootdir;
public OutlineContentProvider(DocItem root)
{
rootdir = root;
}
/**
* Notifies this content provider that the given viewer's input
* has been switched to a different element.
* <p>
* A typical use for this method is registering the content provider as a listener
* to changes on the new input (using model-specific means), and deregistering the viewer
* from the old input. In response to these change notifications, the content provider
* propagates the changes to the viewer.
* </p>
*
* @see IContentProvider#inputChanged(Viewer, Object, Object)
*
* @param viewer the viewer
* @param oldInput the old input element, or <code>null</code> if the viewer
* did not previously have an input
* @param newInput the new input element, or <code>null</code> if the viewer
* does not have an input
*/
public void inputChanged(Viewer viewer2, Object oldInput, Object newInput)
{
if(newInput instanceof DocItem)
{
if(viewer != null)
{
((TreeViewer)viewer2).setExpandedElements(
((TreeViewer)viewer).getExpandedElements()
);
}
viewer = (TreeViewer)viewer2;
rootdir = (DocItem)newInput;
//viewer.expandAll();
}
}
/**
* Gets all the children from a parent
* @see ITreeContentProvider#getChildren(Object)
*/
public Object[] getChildren(Object parentElement)
{
if(parentElement instanceof DocItem)
{
return ((DocItem)parentElement).getChildNodes().toArray();
}
System.err.println("not a doc item");
return EMPTY_ARRAY;
}
/**
* Get the parent of element
* @see ITreeContentProvider#getParent(Object)
*/
public Object getParent(Object element)
{
if(element instanceof DocItem && ((DocItem)element).getParent() != rootdir)
{
DocItem item = (DocItem)element;
if(element == null)
{
return null;
}
else if(item.getParent() == null)
{
return null;
}
//Assert.isNotNull(item.getParent().getName());
if(item.getParent().getName() == null)
throw new IllegalArgumentException("item parent getname is null");
return item.getParent();
}
return null;
}
/**
* does element have any children?
* @see ITreeContentProvider#hasChildren(Object)
*/
public boolean hasChildren(Object element)
{
return ((DocItem)element).hasChildren();
}
/**
* get inputelements children
* @see IStructuredContentProvider#getElements(Object)
*/
public Object[] getElements(Object inputElement)
{
return getChildren(inputElement);
}
/**
* @see IContentProvider#dispose()
*/
public void dispose(){;}
}