1/*
2 * Copyright (C) 2013 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.photos.data;
18
19import android.content.Context;
20import android.content.CursorLoader;
21import android.database.ContentObserver;
22import android.database.Cursor;
23import android.graphics.drawable.Drawable;
24import android.net.Uri;
25import android.provider.MediaStore;
26import android.provider.MediaStore.Files;
27import android.provider.MediaStore.Files.FileColumns;
28
29import com.android.photos.drawables.DataUriThumbnailDrawable;
30import com.android.photos.shims.LoaderCompatShim;
31
32import java.util.ArrayList;
33
34public class PhotoSetLoader extends CursorLoader implements LoaderCompatShim<Cursor> {
35
36    public static final String SUPPORTED_OPERATIONS = "supported_operations";
37
38    private static final Uri CONTENT_URI = Files.getContentUri("external");
39    public static final String[] PROJECTION = new String[] {
40        FileColumns._ID,
41        FileColumns.DATA,
42        FileColumns.WIDTH,
43        FileColumns.HEIGHT,
44        FileColumns.DATE_ADDED,
45        FileColumns.MEDIA_TYPE,
46        SUPPORTED_OPERATIONS,
47    };
48
49    private static final String SORT_ORDER = FileColumns.DATE_ADDED + " DESC";
50    private static final String SELECTION =
51            FileColumns.MEDIA_TYPE + " == " + FileColumns.MEDIA_TYPE_IMAGE
52            + " OR "
53            + FileColumns.MEDIA_TYPE + " == " + FileColumns.MEDIA_TYPE_VIDEO;
54
55    public static final int INDEX_ID = 0;
56    public static final int INDEX_DATA = 1;
57    public static final int INDEX_WIDTH = 2;
58    public static final int INDEX_HEIGHT = 3;
59    public static final int INDEX_DATE_ADDED = 4;
60    public static final int INDEX_MEDIA_TYPE = 5;
61    public static final int INDEX_SUPPORTED_OPERATIONS = 6;
62
63    private static final Uri GLOBAL_CONTENT_URI = Uri.parse("content://" + MediaStore.AUTHORITY + "/external/");
64    private final ContentObserver mGlobalObserver = new ForceLoadContentObserver();
65
66    public PhotoSetLoader(Context context) {
67        super(context, CONTENT_URI, PROJECTION, SELECTION, null, SORT_ORDER);
68    }
69
70    @Override
71    protected void onStartLoading() {
72        super.onStartLoading();
73        getContext().getContentResolver().registerContentObserver(GLOBAL_CONTENT_URI,
74                true, mGlobalObserver);
75    }
76
77    @Override
78    protected void onReset() {
79        super.onReset();
80        getContext().getContentResolver().unregisterContentObserver(mGlobalObserver);
81    }
82
83    @Override
84    public Drawable drawableForItem(Cursor item, Drawable recycle) {
85        DataUriThumbnailDrawable drawable = null;
86        if (recycle == null || !(recycle instanceof DataUriThumbnailDrawable)) {
87            drawable = new DataUriThumbnailDrawable();
88        } else {
89            drawable = (DataUriThumbnailDrawable) recycle;
90        }
91        drawable.setImage(item.getString(INDEX_DATA),
92                item.getInt(INDEX_WIDTH), item.getInt(INDEX_HEIGHT));
93        return drawable;
94    }
95
96    @Override
97    public Uri uriForItem(Cursor item) {
98        return null;
99    }
100
101    @Override
102    public ArrayList<Uri> urisForSubItems(Cursor item) {
103        return null;
104    }
105
106    @Override
107    public void deleteItemWithPath(Object path) {
108
109    }
110
111    @Override
112    public Object getPathForItem(Cursor item) {
113        return null;
114    }
115}
116