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.camera.data;
18
19import android.content.Context;
20import android.net.Uri;
21import android.os.AsyncTask;
22import android.view.View;
23
24import com.android.camera.data.FilmstripItem.VideoClickedCallback;
25import com.google.common.base.Optional;
26
27/**
28 * A {@link LocalFilmstripDataAdapter} which puts a {@link FilmstripItem} fixed at the last
29 * position. It's done by combining a {@link FilmstripItem} and another
30 * {@link LocalFilmstripDataAdapter}.
31 */
32public class FixedLastProxyAdapter extends FilmstripDataAdapterProxy {
33    private FilmstripItem mLastData;
34    private Listener mListener;
35
36    /**
37     * Constructor.
38     *
39     * @param context A valid Android context.
40     * @param wrappedAdapter The {@link LocalFilmstripDataAdapter} to be wrapped.
41     * @param lastData The {@link FilmstripItem} to be placed at the last position.
42     */
43    public FixedLastProxyAdapter(
44          Context context,
45          LocalFilmstripDataAdapter wrappedAdapter,
46          FilmstripItem lastData) {
47        super(context, wrappedAdapter);
48        if (lastData == null) {
49            throw new AssertionError("data is null");
50        }
51        mLastData = lastData;
52    }
53
54    @Override
55    public void setListener(Listener listener) {
56        super.setListener(listener);
57        mListener = listener;
58    }
59
60    @Override
61    public FilmstripItem getItemAt(int index) {
62        int totalNumber = mAdapter.getTotalNumber();
63
64        if (index < totalNumber) {
65            return mAdapter.getItemAt(index);
66        } else if (index == totalNumber) {
67            return mLastData;
68        }
69        return null;
70    }
71
72    @Override
73    public void removeAt(int index) {
74        if (index < mAdapter.getTotalNumber()) {
75            mAdapter.removeAt(index);
76        }
77    }
78
79    @Override
80    public int findByContentUri(Uri uri) {
81        return mAdapter.findByContentUri(uri);
82    }
83
84    @Override
85    public void updateItemAt(final int pos, FilmstripItem item) {
86        int totalNumber = mAdapter.getTotalNumber();
87
88        if (pos < totalNumber) {
89            mAdapter.updateItemAt(pos, item);
90        } else if (pos == totalNumber) {
91            mLastData = item;
92            if (mListener != null) {
93                mListener.onFilmstripItemUpdated(new UpdateReporter() {
94                    @Override
95                    public boolean isDataRemoved(int index) {
96                        return false;
97                    }
98
99                    @Override
100                    public boolean isDataUpdated(int index) {
101                        return (index == pos);
102                    }
103                });
104            }
105        }
106    }
107
108    @Override
109    public int getTotalNumber() {
110        return mAdapter.getTotalNumber() + 1;
111    }
112
113    @Override
114    public View getView(View recycled, int index, VideoClickedCallback videoClickedCallback) {
115        int totalNumber = mAdapter.getTotalNumber();
116
117        if (index < totalNumber) {
118            return mAdapter.getView(recycled, index, videoClickedCallback);
119        } else if (index == totalNumber) {
120            mLastData.setSuggestedSize(mSuggestedWidth, mSuggestedHeight);
121            return mLastData.getView(Optional.fromNullable(recycled), null, false,
122                  videoClickedCallback);
123        }
124        return null;
125    }
126
127    @Override
128    public int getItemViewType(int index) {
129        int totalNumber = mAdapter.getTotalNumber();
130
131        if (index < totalNumber) {
132            return mAdapter.getItemViewType(index);
133        } else if (index == totalNumber) {
134            return mLastData.getItemViewType().ordinal();
135        }
136        return -1;
137   }
138
139    @Override
140    public FilmstripItem getFilmstripItemAt(int index) {
141        int totalNumber = mAdapter.getTotalNumber();
142
143        if (index < totalNumber) {
144            return mAdapter.getFilmstripItemAt(index);
145        } else if (index == totalNumber) {
146            return mLastData;
147        }
148        return null;
149    }
150
151    @Override
152    public AsyncTask updateMetadataAt(int index) {
153        if (index < mAdapter.getTotalNumber()) {
154            return mAdapter.updateMetadataAt(index);
155        } else {
156            MetadataLoader.loadMetadata(mContext, mLastData);
157        }
158        return null;
159    }
160
161    @Override
162    public boolean isMetadataUpdatedAt(int index) {
163        if (index < mAdapter.getTotalNumber()) {
164            return mAdapter.isMetadataUpdatedAt(index);
165        } else {
166            return mLastData.getMetadata().isLoaded();
167        }
168    }
169}
170