--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/org.eclipse.equinox.common/src/org/eclipse/core/runtime/SubProgressMonitor.d	Sat Mar 14 18:23:29 2009 +0100
@@ -0,0 +1,190 @@
+/*******************************************************************************
+ * Copyright (c) 2000, 2007 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
+ * Port to the D programming language:
+ *     Frank Benoit <benoit@tionex.de>
+ *******************************************************************************/
+module org.eclipse.core.runtime.SubProgressMonitor;
+
+import org.eclipse.core.runtime.ProgressMonitorWrapper;
+import org.eclipse.core.runtime.IProgressMonitor;
+
+import java.lang.all;
+
+/**
+ * For new implementations consider using {@link SubMonitor}.
+ *
+ * A progress monitor that uses a given amount of work ticks
+ * from a parent monitor. It can be used as follows:
+ * <pre>
+ *     try {
+ *         pm.beginTask("Main Task", 100);
+ *         doSomeWork(pm, 30);
+ *         SubProgressMonitor subMonitor= new SubProgressMonitor(pm, 40);
+ *         try {
+ *             subMonitor.beginTask("", 300);
+ *             doSomeWork(subMonitor, 300);
+ *         } finally {
+ *             subMonitor.done();
+ *         }
+ *         doSomeWork(pm, 30);
+ *     } finally {
+ *         pm.done();
+ *     }
+ * </pre>
+ * <p>
+ * This class can be used without OSGi running.
+ * </p><p>
+ * This class may be instantiated or subclassed by clients.
+ * </p>
+ *
+ * @see SubMonitor
+ */
+public class SubProgressMonitor : ProgressMonitorWrapper {
+
+    /**
+     * Style constant indicating that calls to <code>subTask</code>
+     * should not have any effect.
+     *
+     * @see #SubProgressMonitor(IProgressMonitor,int,int)
+     */
+    public static const int SUPPRESS_SUBTASK_LABEL = 1 << 1;
+    /**
+     * Style constant indicating that the main task label
+     * should be prepended to the subtask label.
+     *
+     * @see #SubProgressMonitor(IProgressMonitor,int,int)
+     */
+    public static const int PREPEND_MAIN_LABEL_TO_SUBTASK = 1 << 2;
+
+    private int parentTicks = 0;
+    private double sentToParent = 0.0;
+    private double scale = 0.0;
+    private int nestedBeginTasks = 0;
+    private bool usedUp = false;
+    private bool hasSubTask = false;
+    private int style;
+    private String mainTaskLabel;
+
+    /**
+     * Creates a new sub-progress monitor for the given monitor. The sub
+     * progress monitor uses the given number of work ticks from its
+     * parent monitor.
+     *
+     * @param monitor the parent progress monitor
+     * @param ticks the number of work ticks allocated from the
+     *    parent monitor
+     */
+    public this(IProgressMonitor monitor, int ticks) {
+        this(monitor, ticks, 0);
+    }
+
+    /**
+     * Creates a new sub-progress monitor for the given monitor. The sub
+     * progress monitor uses the given number of work ticks from its
+     * parent monitor.
+     *
+     * @param monitor the parent progress monitor
+     * @param ticks the number of work ticks allocated from the
+     *    parent monitor
+     * @param style one of
+     *    <ul>
+     *    <li> <code>SUPPRESS_SUBTASK_LABEL</code> </li>
+     *    <li> <code>PREPEND_MAIN_LABEL_TO_SUBTASK</code> </li>
+     *    </ul>
+     * @see #SUPPRESS_SUBTASK_LABEL
+     * @see #PREPEND_MAIN_LABEL_TO_SUBTASK
+     */
+    public this(IProgressMonitor monitor, int ticks, int style) {
+        super(monitor);
+        this.parentTicks = (ticks > 0) ? ticks : 0;
+        this.style = style;
+    }
+
+    /* (Intentionally not javadoc'd)
+     * Implements the method <code>IProgressMonitor.beginTask</code>.
+     *
+     * Starts a new main task. Since this progress monitor is a sub
+     * progress monitor, the given name will NOT be used to update
+     * the progress bar's main task label. That means the given
+     * string will be ignored. If style <code>PREPEND_MAIN_LABEL_TO_SUBTASK
+     * <code> is specified, then the given string will be prepended to
+     * every string passed to <code>subTask(String)</code>.
+     */
+    public override void beginTask(String name, int totalWork) {
+        nestedBeginTasks++;
+        // Ignore nested begin task calls.
+        if (nestedBeginTasks > 1) {
+            return;
+        }
+        // be safe:  if the argument would cause math errors (zero or
+        // negative), just use 0 as the scale.  This disables progress for
+        // this submonitor.
+        scale = totalWork <= 0 ? 0 : cast(double) parentTicks / cast(double) totalWork;
+        if ((style & PREPEND_MAIN_LABEL_TO_SUBTASK) !is 0) {
+            mainTaskLabel = name;
+        }
+    }
+
+    /* (Intentionally not javadoc'd)
+     * Implements the method <code>IProgressMonitor.done</code>.
+     */
+    public override void done() {
+        // Ignore if more done calls than beginTask calls or if we are still
+        // in some nested beginTasks
+        if (nestedBeginTasks is 0 || --nestedBeginTasks > 0)
+            return;
+        // Send any remaining ticks and clear out the subtask text
+        double remaining = parentTicks - sentToParent;
+        if (remaining > 0)
+            super.internalWorked(remaining);
+        //clear the sub task if there was one
+        if (hasSubTask)
+            subTask(""); //$NON-NLS-1$
+        sentToParent = 0;
+    }
+
+    /* (Intentionally not javadoc'd)
+     * Implements the internal method <code>IProgressMonitor.internalWorked</code>.
+     */
+    public override void internalWorked(double work) {
+        if (usedUp || nestedBeginTasks !is 1) {
+            return;
+        }
+
+        double realWork = (work > 0.0) ? scale * work : 0.0;
+        super.internalWorked(realWork);
+        sentToParent += realWork;
+        if (sentToParent >= parentTicks) {
+            usedUp = true;
+        }
+    }
+
+    /* (Intentionally not javadoc'd)
+     * Implements the method <code>IProgressMonitor.subTask</code>.
+     */
+    public override void subTask(String name) {
+        if ((style & SUPPRESS_SUBTASK_LABEL) !is 0) {
+            return;
+        }
+        hasSubTask = true;
+        String label = name;
+        if ((style & PREPEND_MAIN_LABEL_TO_SUBTASK) !is 0 && mainTaskLabel !is null && mainTaskLabel.length > 0) {
+            label = mainTaskLabel ~ ' ' ~ label;
+        }
+        super.subTask(label);
+    }
+
+    /* (Intentionally not javadoc'd)
+     * Implements the method <code>IProgressMonitor.worked</code>.
+     */
+    public override void worked(int work) {
+        internalWorked(work);
+    }
+}