blob: 1669ddbeaea00a5ec848b1c2c214e9a1a352f33f (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
/*******************************************************************************
* 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;
}
}
|
