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      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 
     17 package com.android.camera.data;
     18 
     19 import android.content.Context;
     20 import android.net.Uri;
     21 import android.os.AsyncTask;
     22 import android.view.View;
     23 
     24 import com.android.camera.data.FilmstripItem.VideoClickedCallback;
     25 import 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  */
     32 public 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