| /******************************************************************************* |
| * Copyright (c) 2008, 2018 Alexander Kurtakov. |
| * |
| * This program and the accompanying materials are made |
| * available under the terms of the Eclipse Public License 2.0 |
| * which is available at https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Alexander Kurtakov - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.linuxtools.internal.rpm.ui.editor.outline; |
| |
| 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; |
| |
| /** |
| * Simple filter that only check whether the label contains the given string to |
| * look for. |
| */ |
| public class ContainsFilter extends ViewerFilter { |
| |
| private String lookFor; |
| |
| public void setLookFor(String lookFor) { |
| this.lookFor = lookFor; |
| } |
| |
| @Override |
| public boolean select(Viewer viewer, Object parentElement, Object element) { |
| if (!(viewer instanceof TreeViewer)) { |
| return true; |
| } |
| TreeViewer treeViewer = (TreeViewer) viewer; |
| String currentLabel = ((ILabelProvider) treeViewer.getLabelProvider()).getText(element); |
| if (lookFor == null) { |
| return true; |
| } |
| if (currentLabel != null && currentLabel.contains(lookFor)) { |
| return true; |
| } |
| return hasUnfilteredChild(treeViewer, element); |
| } |
| |
| private boolean hasUnfilteredChild(TreeViewer viewer, Object element) { |
| Object[] children = ((ITreeContentProvider) viewer.getContentProvider()).getChildren(element); |
| for (Object child : children) { |
| if (select(viewer, element, child)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| } |