/*******************************************************************************
* Copyright (c) 2010, 2011 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.sse.ui.internal.quickoutline;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.osgi.util.TextProcessor;
import org.eclipse.wst.sse.ui.internal.filter.StringMatcher;
/**
* Default Viewer Filter to be used by the {@link QuickOutlinePopupDialog}
* <p>
* Based on {@link org.eclipse.jdt.internal.ui.text.AbstractInformationControl.NamePatternFilter}
* </p>
*/
public class StringPatternFilter extends ViewerFilter {
private StringMatcher fStringMatcher;
/*
* @see org.eclipse.jface.viewers.ViewerFilter#select(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
*/
public boolean select(Viewer viewer, Object parentElement, Object element) {
StringMatcher matcher = fStringMatcher;
if (matcher == null || !(viewer instanceof TreeViewer))
return true;
TreeViewer treeViewer = (TreeViewer) viewer;
String matchName = ((ILabelProvider) treeViewer.getLabelProvider()).getText(element);
matchName = TextProcessor.deprocess(matchName);
if (matchName != null && matcher.match(matchName))
return true;
return hasUnfilteredChild(treeViewer, element);
}
private boolean hasUnfilteredChild(TreeViewer viewer, Object element) {
Object[] children= ((ITreeContentProvider) viewer.getContentProvider()).getChildren(element);
for (int i= 0; i < children.length; i++)
if (select(viewer, element, children[i]))
return true;
return false;
}
public void updatePattern(String pattern) {
if (pattern.length() == 0) {
fStringMatcher = null;
}
else {
fStringMatcher = new StringMatcher(pattern, pattern.toLowerCase().equals(pattern), false);
}
}
public StringMatcher getStringMatcher() {
return fStringMatcher;
}
}