1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.sdkuilib.internal.tasks;
18
19import com.android.sdklib.internal.repository.ITask;
20import com.android.sdklib.internal.repository.ITaskFactory;
21import com.android.sdklib.internal.repository.ITaskMonitor;
22
23import org.eclipse.swt.widgets.Shell;
24
25/**
26 * An {@link ITaskFactory} that creates a new {@link ProgressTask} dialog
27 * for each new task.
28 */
29public final class ProgressTaskFactory implements ITaskFactory {
30
31    private final Shell mShell;
32
33    public ProgressTaskFactory(Shell shell) {
34        mShell = shell;
35    }
36
37    @Override
38    public void start(String title, ITask task) {
39        start(title, null /*parentMonitor*/, task);
40    }
41
42    @Override
43    public void start(String title, ITaskMonitor parentMonitor, ITask task) {
44
45        if (parentMonitor == null) {
46            ProgressTask p = new ProgressTask(mShell, title);
47            p.start(task);
48        } else {
49            // Use all the reminder of the parent monitor.
50            if (parentMonitor.getProgressMax() == 0) {
51                parentMonitor.setProgressMax(1);
52            }
53
54            ITaskMonitor sub = parentMonitor.createSubMonitor(
55                    parentMonitor.getProgressMax() - parentMonitor.getProgress());
56            try {
57                task.run(sub);
58            } finally {
59                int delta =
60                    sub.getProgressMax() - sub.getProgress();
61                if (delta > 0) {
62                    sub.incProgress(delta);
63                }
64            }
65        }
66    }
67}
68