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 */
16package com.android.dreams.phototable;
17
18import android.content.Context;
19import android.content.SharedPreferences;
20
21import java.io.InputStream;
22import java.util.ArrayList;
23import java.util.Collection;
24
25/**
26 * Picks a random image from the local store.
27 */
28public class StockSource extends PhotoSource {
29    public static final String ALBUM_ID = "com.android.dreams.phototable.StockSource";
30    private static final String TAG = "PhotoTable.StockSource";
31    private static final int[] PHOTOS = { R.drawable.blank_photo };
32
33    private final ArrayList<ImageData> mImageCache;
34    private final ArrayList<AlbumData> mAlbumCache;
35
36    private final ArrayList<ImageData> mImageList;
37    private final ArrayList<AlbumData> mAlbumList;
38
39    private final String mStockPhotoName;
40
41    public StockSource(Context context, SharedPreferences settings) {
42        super(context, settings, null);
43        mSourceName = TAG;
44        mStockPhotoName = mResources.getString(R.string.stock_photo_album_name, "Default Photos");
45        mImageCache = new ArrayList<ImageData>(PHOTOS.length);
46        mAlbumCache = new ArrayList<AlbumData>(1);
47        mImageList = new ArrayList<ImageData>(PHOTOS.length);
48        mAlbumList = new ArrayList<AlbumData>(1);
49
50        AlbumData albumData = new AlbumData();
51        albumData.id = ALBUM_ID;
52        albumData.account = mStockPhotoName;
53        albumData.title = mStockPhotoName;
54        mAlbumCache.add(albumData);
55
56        for (int i = 0; i < PHOTOS.length; i++) {
57            ImageData imageData = new ImageData();
58            imageData.id = Integer.toString(i);
59            mImageCache.add(imageData);
60        }
61
62        fillQueue();
63    }
64
65    @Override
66    public Collection<AlbumData> findAlbums() {
67        if (mAlbumList.isEmpty()) {
68            mAlbumList.addAll(mAlbumCache);
69        }
70        log(TAG, "returning a list of albums: " + mAlbumList.size());
71        return mAlbumList;
72    }
73
74    @Override
75    protected Collection<ImageData> findImages(int howMany) {
76        if (mImageList.isEmpty()) {
77            mImageList.addAll(mImageCache);
78        }
79        return mImageList;
80    }
81
82    @Override
83    protected InputStream getStream(ImageData data, int longSide) {
84        InputStream is = null;
85        try {
86            log(TAG, "opening:" + data.id);
87            int idx = Integer.valueOf(data.id);
88            is = mResources.openRawResource(PHOTOS[idx]);
89        } catch (Exception ex) {
90            log(TAG, ex.toString());
91            is = null;
92        }
93
94        return is;
95    }
96
97    @Override
98    public ImageData naturalNext(ImageData current) {
99        int idx = Integer.valueOf(current.id);
100        idx = (idx + 1) % PHOTOS.length;
101        return mImageCache.get(idx);
102    }
103
104    @Override
105    public ImageData naturalPrevious(ImageData current) {
106        int idx = Integer.valueOf(current.id);
107        idx = (PHOTOS.length + idx - 1) % PHOTOS.length;
108        return mImageCache.get(idx);
109    }
110
111    @Override
112    protected void donePaging(ImageData current) {
113    }
114}
115
116