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/*******************************************************************************
* Copyright (c) 2005 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.debug.internal.ui.viewers.update;
import java.util.ArrayList;
import org.eclipse.debug.internal.ui.viewers.AsynchronousTreeViewer;
import org.eclipse.debug.internal.ui.viewers.AsynchronousViewer;
import org.eclipse.debug.internal.ui.viewers.IModelChangedListener;
import org.eclipse.debug.internal.ui.viewers.IModelDelta;
import org.eclipse.debug.internal.ui.viewers.IModelDeltaNode;
import org.eclipse.debug.internal.ui.viewers.TreePath;
import org.eclipse.debug.internal.ui.viewers.TreeSelection;
/**
* Update policy for the launch manager.
*
* @since 3.2
*/
public class DefaultUpdatePolicy extends AbstractUpdatePolicy implements IModelChangedListener {
public DefaultUpdatePolicy() {
super();
}
public void init(AsynchronousViewer viewer) {
super.init(viewer);
}
public synchronized void dispose() {
super.dispose();
}
public void modelChanged(IModelDelta delta) {
IModelDeltaNode[] nodes = delta.getNodes();
updateNodes(nodes);
}
private void updateNodes(IModelDeltaNode[] nodes) {
for (int i = 0; i < nodes.length; i++) {
IModelDeltaNode node = nodes[i];
int flags = node.getFlags();
if ((flags & IModelDelta.CHANGED) != 0) {
handleChange(node);
} else if ((flags & IModelDelta.ADDED) != 0) {
handleAdd(node);
} else if ((flags & IModelDelta.REMOVED) != 0) {
handleRemove(node);
}
IModelDeltaNode[] childNodes = node.getNodes();
for (int j = 0; j < childNodes.length; j++) {
updateNodes(childNodes);
}
}
}
private void handleChange(IModelDeltaNode node) {
int flags = node.getFlags();
if ((flags & IModelDelta.STATE) != 0) {
getViewer().update(node.getElement());
}
if ((flags & IModelDelta.CONTENT) != 0) {
getViewer().refresh(node.getElement());
}
if ((flags & IModelDelta.SELECT) != 0) {
getViewer().update(node.getElement());
TreePath treePath = getTreePath(node);
((AsynchronousTreeViewer) getViewer()).setSelection(new TreeSelection(treePath));
}
if ((flags & IModelDelta.EXPAND) != 0) {
getViewer().update(node.getElement());
TreePath treePath = getTreePath(node);
((AsynchronousTreeViewer) getViewer()).expand(new TreeSelection(treePath));
}
}
private void handleAdd(IModelDeltaNode node) {
int flags = node.getFlags();
final TreePath treePath = getTreePath(node);
((AsynchronousTreeViewer) getViewer()).add(treePath);
if ((flags & IModelDelta.STATE) != 0) {
// do nothing??
}
if ((flags & IModelDelta.CONTENT) != 0) {
// do nothing??
}
if ((flags & IModelDelta.SELECT) != 0) {
((AsynchronousTreeViewer) getViewer()).setSelection(new TreeSelection(treePath));
}
if ((flags & IModelDelta.EXPAND) != 0) {
((AsynchronousTreeViewer) getViewer()).expand(new TreeSelection(treePath));
}
}
private void handleRemove(IModelDeltaNode node) {
TreePath treePath = getTreePath(node);
((AsynchronousTreeViewer) getViewer()).remove(treePath);
}
private TreePath getTreePath(IModelDeltaNode node) {
ArrayList list = new ArrayList();
list.add(0, node.getElement());
while (node.getParent() != null) {
node = node.getParent();
list.add(0, node.getElement());
}
return new TreePath(list.toArray());
}
}
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