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.LocalData.ActionCallback;
25import com.android.camera.filmstrip.ImageData;
26
27/**
28 * A {@link LocalDataAdapter} which puts a {@link LocalData} fixed at the last
29 * position. It's done by combining a {@link LocalData} and another
30 * {@link LocalDataAdapter}.
31 */
32public class FixedLastDataAdapter extends AbstractLocalDataAdapterWrapper {
33
34    private LocalData mLastData;
35    private Listener mListener;
36
37    /**
38     * Constructor.
39     *
40     * @param context A valid Android context.
41     * @param wrappedAdapter The {@link LocalDataAdapter} to be wrapped.
42     * @param lastData The {@link LocalData} to be placed at the last position.
43     */
44    public FixedLastDataAdapter(
45            Context context,
46            LocalDataAdapter wrappedAdapter,
47            LocalData lastData) {
48        super(context, wrappedAdapter);
49        if (lastData == null) {
50            throw new AssertionError("data is null");
51        }
52        mLastData = lastData;
53    }
54
55    @Override
56    public void setListener(Listener listener) {
57        super.setListener(listener);
58        mListener = listener;
59    }
60
61    @Override
62    public LocalData getLocalData(int dataID) {
63        int totalNumber = mAdapter.getTotalNumber();
64
65        if (dataID < totalNumber) {
66            return mAdapter.getLocalData(dataID);
67        } else if (dataID == totalNumber) {
68            return mLastData;
69        }
70        return null;
71    }
72
73    @Override
74    public void removeData(int dataID) {
75        if (dataID < mAdapter.getTotalNumber()) {
76            mAdapter.removeData(dataID);
77        }
78    }
79
80    @Override
81    public int findDataByContentUri(Uri uri) {
82        return mAdapter.findDataByContentUri(uri);
83    }
84
85    @Override
86    public void updateData(final int pos, LocalData data) {
87        int totalNumber = mAdapter.getTotalNumber();
88
89        if (pos < totalNumber) {
90            mAdapter.updateData(pos, data);
91        } else if (pos == totalNumber) {
92            mLastData = data;
93            if (mListener != null) {
94                mListener.onDataUpdated(new UpdateReporter() {
95                    @Override
96                    public boolean isDataRemoved(int dataID) {
97                        return false;
98                    }
99
100                    @Override
101                    public boolean isDataUpdated(int dataID) {
102                        return (dataID == pos);
103                    }
104                });
105            }
106        }
107    }
108
109    @Override
110    public int getTotalNumber() {
111        return mAdapter.getTotalNumber() + 1;
112    }
113
114    @Override
115    public View getView(Context context, View recycled, int dataID, ActionCallback actionCallback) {
116        int totalNumber = mAdapter.getTotalNumber();
117
118        if (dataID < totalNumber) {
119            return mAdapter.getView(context, recycled, dataID, actionCallback);
120        } else if (dataID == totalNumber) {
121            return mLastData.getView(context, recycled, mSuggestedWidth, mSuggestedHeight, 0, null,
122                    false, actionCallback);
123        }
124        return null;
125    }
126
127    @Override
128    public int getItemViewType(int dataId) {
129        int totalNumber = mAdapter.getTotalNumber();
130
131        if (dataId < totalNumber) {
132            return mAdapter.getItemViewType(dataId);
133        } else if (dataId == totalNumber) {
134            return mLastData.getItemViewType().ordinal();
135        }
136        return -1;
137   }
138
139    @Override
140    public void resizeView(Context context, int dataID, View view, int w, int h) {
141        // Do nothing.
142    }
143
144    @Override
145    public ImageData getImageData(int dataID) {
146        int totalNumber = mAdapter.getTotalNumber();
147
148        if (dataID < totalNumber) {
149            return mAdapter.getImageData(dataID);
150        } else if (dataID == totalNumber) {
151            return mLastData;
152        }
153        return null;
154    }
155
156    @Override
157    public boolean canSwipeInFullScreen(int dataID) {
158        int totalNumber = mAdapter.getTotalNumber();
159
160        if (dataID < totalNumber) {
161            return mAdapter.canSwipeInFullScreen(dataID);
162        } else if (dataID == totalNumber) {
163            return mLastData.canSwipeInFullScreen();
164        }
165        return false;
166    }
167
168    @Override
169    public AsyncTask updateMetadata(int dataId) {
170        if (dataId < mAdapter.getTotalNumber()) {
171            return mAdapter.updateMetadata(dataId);
172        } else {
173            MetadataLoader.loadMetadata(mContext, mLastData);
174        }
175        return null;
176    }
177
178    @Override
179    public boolean isMetadataUpdated(int dataId) {
180        if (dataId < mAdapter.getTotalNumber()) {
181            return mAdapter.isMetadataUpdated(dataId);
182        } else {
183            return MetadataLoader.isMetadataCached(mLastData);
184        }
185    }
186}
187