RCP work 1

1 files changed, 57 insertions, 0 deletions

diff --git a/org.eclipse.help.base/src/org/eclipse/help/internal/search/LazyProgressMonitor.java b/org.eclipse.help.base/src/org/eclipse/help/internal/search/LazyProgressMonitor.java
new file mode 100644
index 000000000..8e277db13
--- /dev/null
+++ b/org.eclipse.help.base/src/org/eclipse/help/internal/search/LazyProgressMonitor.java
@@ -0,0 +1,57 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2003 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials 
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ * 
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *******************************************************************************/
+package org.eclipse.help.internal.search;
+import org.eclipse.core.runtime.IProgressMonitor;
+import java.lang.String;
+import org.eclipse.core.runtime.ProgressMonitorWrapper;
+/**
+ * Progress Monitor, that accumulates work without
+ * communicating it immidiately to the underlying monitor.
+ * The work is sent in larger chunks for performance reasons.
+ */
+class LazyProgressMonitor extends ProgressMonitorWrapper {
+	// maximum number of times worked() should be called
+	// on underlying progress monitor
+	private static final int MAX_STEPS = 100;
+	private final IProgressMonitor monitor;
+	private int totalWork;
+	private int work;
+	private int lastWorked;
+	private int treshold;
+	protected LazyProgressMonitor(IProgressMonitor monitor) {
+		super(monitor);
+		this.monitor = monitor;
+	}
+	/** 
+	 * @see IProgressMonitor#beginTask
+	 */
+	public void beginTask(String name, int totalWork) {
+		if (totalWork > 0) {
+			this.totalWork = totalWork;
+		}
+		monitor.beginTask(name, totalWork);
+		work = 0;
+		lastWorked = 0;
+		treshold = 1 + totalWork / MAX_STEPS;
+	}
+	/**
+	 * @see IProgressMonitor#worked
+	 */
+	public void worked(int newWork) {
+		this.work += newWork;
+		if (work >= treshold) {
+			monitor.worked(work - lastWorked);
+			lastWorked = work;
+			treshold = work + 1 + totalWork / MAX_STEPS;
+		}
+
+	}
+}