1/*
2 * Copyright (C) 2012 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.gallery3d.data;
18
19import android.graphics.Bitmap;
20import android.graphics.BitmapRegionDecoder;
21
22import com.android.gallery3d.ui.ScreenNail;
23import com.android.gallery3d.util.ThreadPool.Job;
24import com.android.gallery3d.util.ThreadPool.JobContext;
25
26// SnailItem is a MediaItem which can provide a ScreenNail. This is
27// used so we can show an foreign component (like an
28// android.view.View) instead of a Bitmap.
29public class SnailItem extends MediaItem {
30    @SuppressWarnings("unused")
31    private static final String TAG = "SnailItem";
32    private ScreenNail mScreenNail;
33
34    public SnailItem(Path path) {
35        super(path, nextVersionNumber());
36    }
37
38    @Override
39    public Job<Bitmap> requestImage(int type) {
40        // nothing to return
41        return new Job<Bitmap>() {
42            @Override
43            public Bitmap run(JobContext jc) {
44                return null;
45            }
46        };
47    }
48
49    @Override
50    public Job<BitmapRegionDecoder> requestLargeImage() {
51        // nothing to return
52        return new Job<BitmapRegionDecoder>() {
53            @Override
54            public BitmapRegionDecoder run(JobContext jc) {
55                return null;
56            }
57        };
58    }
59
60    // We do not provide requestImage or requestLargeImage, instead we
61    // provide a ScreenNail.
62    @Override
63    public ScreenNail getScreenNail() {
64        return mScreenNail;
65    }
66
67    @Override
68    public String getMimeType() {
69        return "";
70    }
71
72    // Returns width and height of the media item.
73    // Returns 0, 0 if the information is not available.
74    @Override
75    public int getWidth() {
76        return 0;
77    }
78
79    @Override
80    public int getHeight() {
81        return 0;
82    }
83
84    //////////////////////////////////////////////////////////////////////////
85    //  Extra methods for SnailItem
86    //////////////////////////////////////////////////////////////////////////
87
88    public void setScreenNail(ScreenNail screenNail) {
89        mScreenNail = screenNail;
90    }
91
92    public void updateVersion() {
93        mDataVersion = nextVersionNumber();
94    }
95}
96