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package org.eclipse.team.internal.ccvs.core.util;
/*
* (c) Copyright IBM Corp. 2000, 2002.
* All Rights Reserved.
*/
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.SubProgressMonitor;
/**
* Provides an infinite progress monitor by subdividing by half repeatedly.
*
* The ticks parameter represents the number of ticks shown in the progress dialog.
* However, the number of ticks that can actually be worked is n*ticks/2 where
* 2^n = ticks. What this means is that if you provide a ticks of 32 (2^5) than
* the maximum number of ticks is 5*32/2 = 80.
*
*/
public class InfiniteSubProgressMonitor extends SubProgressMonitor {
int totalWork;
int halfWay;
int currentIncrement;
int nextProgress;
int worked;
/**
* Constructor for InfiniteSubProgressMonitor.
* @param monitor
* @param ticks
*/
public InfiniteSubProgressMonitor(IProgressMonitor monitor, int ticks) {
this(monitor, ticks, 0);
}
/**
* Constructor for InfiniteSubProgressMonitor.
* @param monitor
* @param ticks
* @param style
*/
public InfiniteSubProgressMonitor(IProgressMonitor monitor, int ticks, int style) {
super(monitor, ticks, style);
}
public void beginTask(String name, int totalWork) {
super.beginTask(name, totalWork);
this.totalWork = totalWork;
this.halfWay = totalWork / 2;
this.currentIncrement = 1;
this.nextProgress = currentIncrement;
this.worked = 0;
}
public void worked(int work) {
if (worked >= totalWork) return;
if (--nextProgress <= 0) {
super.worked(1);
worked++;
if (worked >= halfWay) {
// we have passed the current halfway point, so double the
// increment and reset the halfway point.
currentIncrement *= 2;
halfWay += (totalWork - halfWay) / 2;
}
// reset the progress counter to another full increment
nextProgress = currentIncrement;
}
}
}
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