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/*******************************************************************************
* Copyright (c) 2014 Wind River Systems, Inc. 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:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.debug.test;
import java.util.AbstractSet;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.regex.Pattern;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.internal.ui.viewers.model.provisional.VirtualItem;
import org.eclipse.debug.internal.ui.viewers.model.provisional.VirtualTreeModelViewer;
import org.eclipse.jface.viewers.IElementComparer;
import org.eclipse.jface.viewers.TreePath;
import org.eclipse.tcf.debug.ui.ITCFObject;
/**
* Extends base listener to use virtual viewer capabilities.
*/
@SuppressWarnings("restriction")
public class VirtualViewerUpdatesListener extends ViewerUpdatesListener {
private final VirtualTreeModelViewer fVirtualViewer;
public VirtualViewerUpdatesListener(VirtualTreeModelViewer viewer) {
super(viewer, false, false);
fVirtualViewer = viewer;
}
public VirtualItem findElement(Pattern[] patterns) {
return findElement(fVirtualViewer.getTree(), patterns);
}
public VirtualItem findElement(VirtualItem parent, Pattern[] patterns) {
return findElement(parent, patterns, 0);
}
private VirtualItem findElement(VirtualItem parent, Pattern[] patterns, int patternIdx) {
if (patternIdx >= patterns.length) return parent;
for (VirtualItem child : parent.getItems()) {
String[] label = (String[])child.getData(VirtualItem.LABEL_KEY);
if (label != null && label.length >= 1 && label[0] != null &&
patterns[patternIdx].matcher(label[0]).matches())
{
VirtualItem item = findElement(child, patterns, patternIdx+1);
if (item != null) {
return item;
}
}
}
return null;
}
@Override
protected Set<TreePath> makeTreePathSet() {
return new MatchingSet();
}
protected boolean matchPath(TreePath patternPath, TreePath elementPath) {
if (patternPath.getSegmentCount() != elementPath.getSegmentCount()) {
return false;
}
for (int i = 0; i < patternPath.getSegmentCount(); i++) {
Object patternSegment = patternPath.getSegment(i);
Object elementSegment = elementPath.getSegment(i);
if ( fPatternComparer.equals(elementSegment, patternSegment) ) {
continue;
} else if (fTCFContextComparer.equals(elementSegment, patternSegment) ) {
continue;
} else if (patternSegment.equals(elementSegment)) {
continue;
}
return false;
}
return true;
}
private final IElementComparer fPatternComparer = new IElementComparer() {
public boolean equals(Object a, Object b) {
Pattern pattern = null;
Object element = null;
if (a instanceof Pattern) {
pattern = (Pattern) a;
element = b;
} else if (b instanceof Pattern) {
pattern = (Pattern) b;
element = a;
}
if (pattern != null) {
return elementMatches(element, pattern);
}
return false;
}
private boolean elementMatches(Object element, Pattern pattern) {
VirtualItem[] items = fVirtualViewer.findItems(element);
if (items.length >= 0) {
String[] label = (String[])items[0].getData(VirtualItem.LABEL_KEY);
if (label != null && label.length >= 1 && label[0] != null && pattern.matcher(label[0]).matches()) {
return true;
}
}
return false;
}
public int hashCode(Object element) {
throw new UnsupportedOperationException();
}
};
private final IElementComparer fTCFContextComparer = new IElementComparer() {
public boolean equals(Object a, Object b) {
ITCFObject context = null;
Object element = null;
if (a instanceof ITCFObject) {
context = (ITCFObject) a;
element = b;
} else if (b instanceof ITCFObject) {
context = (ITCFObject) b;
element = a;
}
if (context != null) {
return elementMatches((ITCFObject)DebugPlugin.getAdapter(element, ITCFObject.class), context);
}
return false;
}
private boolean elementMatches(ITCFObject element, ITCFObject pattern) {
return element != null && element.getID().equals(pattern.getID());
}
public int hashCode(Object element) {
throw new UnsupportedOperationException();
}
};
class MatchingSet extends AbstractSet<TreePath> {
List<TreePath> fList = new ArrayList<TreePath>(4);
@Override
public Iterator<TreePath> iterator() {
return fList.iterator();
}
@Override
public int size() {
return fList.size();
}
@Override
public boolean add(TreePath o) {
return fList.add(o);
}
@Override
public void clear() {
fList.clear();
}
@Override
public boolean contains(Object o) {
if (o instanceof TreePath) {
return find((TreePath)o) >= 0;
}
return false;
}
@Override
public boolean remove(Object o) {
if (o instanceof TreePath) {
int index = find((TreePath)o);
if (index >= 0) {
fList.remove(index);
return true;
}
}
return false;
}
private int find(TreePath path) {
for (int i = 0; i < fList.size(); i++) {
if (matchPath(fList.get(i), path)) {
return i;
}
}
return -1;
}
}
}
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