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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.app.Activity;
     20 import android.content.Context;
     21 import android.net.Uri;
     22 import android.view.View;
     23 
     24 import com.android.camera.ui.FilmStripView;
     25 
     26 /**
     27  * A {@link LocalDataAdapter} which puts a {@link LocalData} fixed at the last
     28  * position. It's done by combining a {@link LocalData} and another
     29  * {@link LocalDataAdapter}.
     30  */
     31 public class FixedLastDataAdapter extends AbstractLocalDataAdapterWrapper {
     32 
     33     private LocalData mLastData;
     34     private Listener mListener;
     35 
     36     /**
     37      * Constructor.
     38      *
     39      * @param wrappedAdapter  The {@link LocalDataAdapter} to be wrapped.
     40      * @param lastData       The {@link LocalData} to be placed at the last position.
     41      */
     42     public FixedLastDataAdapter(
     43             LocalDataAdapter wrappedAdapter,
     44             LocalData lastData) {
     45         super(wrappedAdapter);
     46         if (lastData == null) {
     47             throw new AssertionError("data is null");
     48         }
     49         mLastData = lastData;
     50     }
     51 
     52     @Override
     53     public void setListener(Listener listener) {
     54         super.setListener(listener);
     55         mListener = listener;
     56     }
     57 
     58     @Override
     59     public LocalData getLocalData(int dataID) {
     60         int totalNumber = mAdapter.getTotalNumber();
     61 
     62         if (dataID < totalNumber) {
     63             return mAdapter.getLocalData(dataID);
     64         } else if (dataID == totalNumber) {
     65             return mLastData;
     66         }
     67 
     68         return null;
     69     }
     70 
     71     @Override
     72     public void removeData(Context context, int dataID) {
     73         if (dataID < mAdapter.getTotalNumber()) {
     74             mAdapter.removeData(context, dataID);
     75         }
     76     }
     77 
     78     @Override
     79     public int findDataByContentUri(Uri uri) {
     80         return mAdapter.findDataByContentUri(uri);
     81     }
     82 
     83     @Override
     84     public void updateData(final int pos, LocalData data) {
     85         int totalNumber = mAdapter.getTotalNumber();
     86 
     87         if (pos < totalNumber) {
     88             mAdapter.updateData(pos, data);
     89         } else if (pos == totalNumber) {
     90             mLastData = data;
     91             if (mListener != null) {
     92                 mListener.onDataUpdated(new UpdateReporter() {
     93                     @Override
     94                     public boolean isDataRemoved(int dataID) {
     95                         return false;
     96                     }
     97 
     98                     @Override
     99                     public boolean isDataUpdated(int dataID) {
    100                         return (dataID == pos);
    101                     }
    102                 });
    103             }
    104         }
    105     }
    106 
    107     @Override
    108     public int getTotalNumber() {
    109         return mAdapter.getTotalNumber() + 1;
    110     }
    111 
    112     @Override
    113     public View getView(Activity activity, int dataID) {
    114         int totalNumber = mAdapter.getTotalNumber();
    115 
    116         if (dataID < totalNumber) {
    117             return mAdapter.getView(activity, dataID);
    118         } else if (dataID == totalNumber) {
    119             return mLastData.getView(activity,
    120                     mSuggestedWidth, mSuggestedHeight, null, null);
    121         }
    122 
    123         return null;
    124     }
    125 
    126     @Override
    127     public FilmStripView.ImageData getImageData(int dataID) {
    128         int totalNumber = mAdapter.getTotalNumber();
    129 
    130         if (dataID < totalNumber) {
    131             return mAdapter.getImageData(dataID);
    132         } else if (dataID == totalNumber) {
    133             return mLastData;
    134         }
    135         return null;
    136     }
    137 
    138     @Override
    139     public boolean canSwipeInFullScreen(int dataID) {
    140         int totalNumber = mAdapter.getTotalNumber();
    141 
    142         if (dataID < totalNumber) {
    143             return mAdapter.canSwipeInFullScreen(dataID);
    144         } else if (dataID == totalNumber) {
    145             return mLastData.canSwipeInFullScreen();
    146         }
    147         return false;
    148     }
    149 }
    150 
    151