| /******************************************************************************* |
| * Copyright (c) 2001, 2004 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 |
| * Jens Lukowski/Innoopract - initial renaming/restructuring |
| * |
| *******************************************************************************/ |
| package org.eclipse.wst.xml.ui.internal.contentoutline; |
| |
| import org.eclipse.jface.viewers.StructuredViewer; |
| import org.w3c.dom.Node; |
| |
| |
| /** |
| * Can handle multiple subsequent calls to processNode(..) by buffering them |
| * w/ a RefreshStructureJob. Only one refresh is performed (on the UI Thread) |
| * on the minimal affected area of the tree at the end of the batch of updates |
| * (after the last update is processed). |
| * |
| * @author pavery |
| */ |
| class BufferedStructureUpdater { |
| |
| private RefreshStructureJob fRefreshJob = null; |
| |
| /** |
| * @param structuredViewer |
| * the viewer we are updating |
| * @param node |
| * the specific node that changed |
| */ |
| public synchronized void processNode(StructuredViewer structuredViewer, Node node) { |
| // refresh on structural and "unknown" changes |
| // it would be nice to not refresh the viewer if it's not visible |
| // but only refresh when it's brought back to the front |
| if (structuredViewer.getControl() != null) { |
| getRefreshJob().refresh(structuredViewer, node); |
| } |
| } |
| |
| private synchronized RefreshStructureJob getRefreshJob() { |
| if (fRefreshJob == null) |
| fRefreshJob = new RefreshStructureJob(); |
| return fRefreshJob; |
| } |
| } |