| /******************************************************************************* |
| * 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.sse.ui.views.contentoutline; |
| |
| import org.eclipse.core.runtime.jobs.IJobChangeEvent; |
| import org.eclipse.core.runtime.jobs.JobChangeAdapter; |
| import org.eclipse.jface.viewers.StructuredViewer; |
| import org.eclipse.wst.sse.ui.nls.ResourceHandler; |
| import org.w3c.dom.Node; |
| |
| |
| /** |
| * Can handle multiple subsequent calls to processNode(..) by buffering them |
| * w/ the JobManager. 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 |
| */ |
| public class BufferedOutlineUpdater { |
| |
| private Node fSmallestParent = null; |
| |
| private Node getSmallestParent() { |
| return fSmallestParent; |
| } |
| |
| /** |
| * @param structuredViewer |
| * the viewer we are updating |
| * @param the |
| * specific node that changed |
| */ |
| public void processNode(final 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 /* |
| * && |
| * !structuredViewer.getControl().isDisposed() && |
| * structuredViewer.getControl().isVisible() |
| */) { |
| final RefreshOutlineJob refreshJob = new RefreshOutlineJob(ResourceHandler.getString("JFaceNodeAdapter.0"), structuredViewer, getSmallestParent(), node); //$NON-NLS-1$ |
| refreshJob.addJobChangeListener(new JobChangeAdapter() { |
| public void done(IJobChangeEvent event) { |
| super.done(event); |
| // each job reports the newly calculated minimal affected |
| // node |
| setSmallestParent(refreshJob.getSmallestParent()); |
| refreshJob.removeJobChangeListener(this); |
| } |
| }); |
| refreshJob.schedule(); |
| } |
| } |
| |
| /** |
| * @param node |
| */ |
| private void setSmallestParent(Node node) { |
| fSmallestParent = node; |
| } |
| |
| } |