src/com/owncloud/android/ui/adapter/LocalFileListAdapter.java

   1 /**
   2  *   ownCloud Android client application
   3  *
   4  *   @author David A. Velasco
   5  *   Copyright (C) 2011  Bartek Przybylski
   6  *   Copyright (C) 2015 ownCloud Inc.
   7  *
   8  *   This program is free software: you can redistribute it and/or modify
   9  *   it under the terms of the GNU General Public License version 2,
  10  *   as published by the Free Software Foundation.
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  *
  20  */
  21 package com.owncloud.android.ui.adapter;
  22
  23 import java.io.File;
  24 import java.util.Arrays;
  25 import java.util.Comparator;
  26
  27 import android.content.Context;
  28 import android.graphics.Bitmap;
  29 import android.view.LayoutInflater;
  30 import android.view.View;
  31 import android.view.ViewGroup;
  32 import android.widget.BaseAdapter;
  33 import android.widget.ImageView;
  34 import android.widget.ListAdapter;
  35 import android.widget.ListView;
  36 import android.widget.TextView;
  37
  38 import com.owncloud.android.R;
  39 import com.owncloud.android.datamodel.ThumbnailsCacheManager;
  40 import com.owncloud.android.lib.common.utils.Log_OC;
  41 import com.owncloud.android.utils.BitmapUtils;
  42 import com.owncloud.android.utils.DisplayUtils;
  43 import com.owncloud.android.utils.MimetypeIconUtil;
  44
  45 /**
  46  * This Adapter populates a ListView with all files and directories contained
  47  * in a local directory
  48  */
  49 public class LocalFileListAdapter extends BaseAdapter implements ListAdapter {
  50
  51     private static final String TAG = LocalFileListAdapter.class.getSimpleName();
  52
  53     private Context mContext;
  54     private File mDirectory;
  55     private File[] mFiles = null;
  56
  57     public LocalFileListAdapter(File directory, Context context) {
  58         mContext = context;
  59         swapDirectory(directory);
  60     }
  61
  62     @Override
  63     public boolean areAllItemsEnabled() {
  64         return true;
  65     }
  66
  67     @Override
  68     public boolean isEnabled(int position) {
  69         return true;
  70     }
  71
  72     @Override
  73     public int getCount() {
  74         return mFiles != null ? mFiles.length : 0;
  75     }
  76
  77     @Override
  78     public Object getItem(int position) {
  79         if (mFiles == null || mFiles.length <= position)
  80             return null;
  81         return mFiles[position];
  82     }
  83
  84     @Override
  85     public long getItemId(int position) {
  86         return mFiles != null && mFiles.length <= position ? position : -1;
  87     }
  88
  89     @Override
  90     public int getItemViewType(int position) {
  91         return 0;
  92     }
  93
  94     @Override
  95     public View getView(int position, View convertView, ViewGroup parent) {
  96         View view = convertView;
  97         if (view == null) {
  98             LayoutInflater inflator = (LayoutInflater) mContext
  99                     .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
 100             view = inflator.inflate(R.layout.list_item, null);
 101         }
 102         if (mFiles != null && mFiles.length > position) {
 103             File file = mFiles[position];
 104
 105             TextView fileName = (TextView) view.findViewById(R.id.Filename);
 106             String name = file.getName();
 107             fileName.setText(name);
 108
 109             ImageView fileIcon = (ImageView) view.findViewById(R.id.thumbnail);
 110
 111             /** Cancellation needs do be checked and done before changing the drawable in fileIcon, or
 112              * {@link ThumbnailsCacheManager#cancelPotentialWork} will NEVER cancel any task.
 113              **/
 114             boolean allowedToCreateNewThumbnail = (ThumbnailsCacheManager.cancelPotentialWork(file, fileIcon));
 115
 116             if (!file.isDirectory()) {
 117                 fileIcon.setImageResource(R.drawable.file);
 118             } else {
 119                 fileIcon.setImageResource(R.drawable.ic_menu_archive);
 120             }
 121             fileIcon.setTag(file.hashCode());
 122
 123             TextView fileSizeV = (TextView) view.findViewById(R.id.file_size);
 124             TextView lastModV = (TextView) view.findViewById(R.id.last_mod);
 125             ImageView checkBoxV = (ImageView) view.findViewById(R.id.custom_checkbox);
 126             if (!file.isDirectory()) {
 127                 fileSizeV.setVisibility(View.VISIBLE);
 128                 fileSizeV.setText(DisplayUtils.bytesToHumanReadable(file.length()));
 129
 130                 lastModV.setVisibility(View.VISIBLE);
 131                 lastModV.setText(DisplayUtils.unixTimeToHumanReadable(file.lastModified()));
 132                 ListView parentList = (ListView) parent;
 133                 if (parentList.getChoiceMode() == ListView.CHOICE_MODE_NONE) {
 134                     checkBoxV.setVisibility(View.GONE);
 135                 } else {
 136                     if (parentList.isItemChecked(position)) {
 137                         checkBoxV.setImageResource(android.R.drawable.checkbox_on_background);
 138                     } else {
 139                         checkBoxV.setImageResource(android.R.drawable.checkbox_off_background);
 140                     }
 141                     checkBoxV.setVisibility(View.VISIBLE);
 142                 }
 143
 144              // get Thumbnail if file is image
 145                 if (BitmapUtils.isImage(file)){
 146                 // Thumbnail in Cache?
 147                     Bitmap thumbnail = ThumbnailsCacheManager.getBitmapFromDiskCache(
 148                             String.valueOf(file.hashCode())
 149                     );
 150                     if (thumbnail != null){
 151                         fileIcon.setImageBitmap(thumbnail);
 152                     } else {
 153
 154                         // generate new Thumbnail
 155                         if (allowedToCreateNewThumbnail) {
 156                             final ThumbnailsCacheManager.ThumbnailGenerationTask task =
 157                                     new ThumbnailsCacheManager.ThumbnailGenerationTask(fileIcon);
 158                             if (thumbnail == null) {
 159                                 thumbnail = ThumbnailsCacheManager.mDefaultImg;
 160                             }
 161                             final ThumbnailsCacheManager.AsyncDrawable asyncDrawable =
 162                                         new ThumbnailsCacheManager.AsyncDrawable(
 163                                     mContext.getResources(),
 164                                     thumbnail,
 165                                     task
 166                                         );
 167                             fileIcon.setImageDrawable(asyncDrawable);
 168                             task.execute(file);
 169                             Log_OC.v(TAG, "Executing task to generate a new thumbnail");
 170
 171                         } // else, already being generated, don't restart it
 172                     }
 173                 } else {
 174                     fileIcon.setImageResource(MimetypeIconUtil.getFileTypeIconId(null, file.getName()));
 175                 }
 176
 177             } else {
 178                 fileSizeV.setVisibility(View.GONE);
 179                 lastModV.setVisibility(View.GONE);
 180                 checkBoxV.setVisibility(View.GONE);
 181             }
 182
 183             // not GONE; the alignment changes; ugly way to keep it
 184             view.findViewById(R.id.localFileIndicator).setVisibility(View.INVISIBLE);
 185             view.findViewById(R.id.favoriteIcon).setVisibility(View.GONE);
 186
 187             view.findViewById(R.id.sharedIcon).setVisibility(View.GONE);
 188             view.findViewById(R.id.sharedWithMeIcon).setVisibility(View.GONE);
 189         }
 190
 191         return view;
 192     }
 193
 194     @Override
 195     public int getViewTypeCount() {
 196         return 1;
 197     }
 198
 199     @Override
 200     public boolean hasStableIds() {
 201         return false;
 202     }
 203
 204     @Override
 205     public boolean isEmpty() {
 206         return (mFiles == null || mFiles.length == 0);
 207     }
 208
 209     /**
 210      * Change the adapted directory for a new one
 211      * @param directory     New file to adapt. Can be NULL, meaning "no content to adapt".
 212      */
 213     public void swapDirectory(File directory) {
 214         mDirectory = directory;
 215         mFiles = (mDirectory != null ? mDirectory.listFiles() : null);
 216         if (mFiles != null) {
 217             Arrays.sort(mFiles, new Comparator<File>() {
 218                 @Override
 219                 public int compare(File lhs, File rhs) {
 220                     if (lhs.isDirectory() && !rhs.isDirectory()) {
 221                         return -1;
 222                     } else if (!lhs.isDirectory() && rhs.isDirectory()) {
 223                         return 1;
 224                     }
 225                     return compareNames(lhs, rhs);
 226                 }
 227
 228                 private int compareNames(File lhs, File rhs) {
 229                     return lhs.getName().toLowerCase().compareTo(rhs.getName().toLowerCase());
 230                 }
 231
 232             });
 233         }
 234         notifyDataSetChanged();
 235     }
 236 }