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

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2011  Bartek Przybylski
   3  *   Copyright (C) 2012-2014 ownCloud Inc.
   4  *
   5  *   This program is free software: you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License version 2,
   7  *   as published by the Free Software Foundation.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18 package com.owncloud.android.ui.adapter;
  19
  20 import java.io.File;
  21 import java.lang.ref.WeakReference;
  22 import java.util.Vector;
  23
  24 import android.accounts.Account;
  25 import android.content.Context;
  26 import android.content.res.Resources;
  27 import android.graphics.Bitmap;
  28 import android.graphics.Bitmap.CompressFormat;
  29 import android.graphics.BitmapFactory;
  30 import android.graphics.drawable.BitmapDrawable;
  31 import android.graphics.drawable.Drawable;
  32 import android.media.ThumbnailUtils;
  33 import android.os.AsyncTask;
  34 import android.util.TypedValue;
  35 import android.view.LayoutInflater;
  36 import android.view.View;
  37 import android.view.ViewGroup;
  38 import android.widget.BaseAdapter;
  39 import android.widget.ImageView;
  40 import android.widget.ListAdapter;
  41 import android.widget.ListView;
  42 import android.widget.TextView;
  43
  44 import com.owncloud.android.R;
  45 import com.owncloud.android.authentication.AccountUtils;
  46 import com.owncloud.android.datamodel.FileDataStorageManager;
  47 import com.owncloud.android.datamodel.OCFile;
  48 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  49 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  50 import com.owncloud.android.ui.activity.ComponentsGetter;
  51 import com.owncloud.android.utils.BitmapUtils;
  52 import com.owncloud.android.utils.DisplayUtils;
  53 import com.owncloud.android.utils.Log_OC;
  54
  55
  56 /**
  57  * This Adapter populates a ListView with all files and folders in an ownCloud
  58  * instance.
  59  *
  60  * @author Bartek Przybylski
  61  * @author Tobias Kaminsky
  62  * @author David A. Velasco
  63  */
  64 public class FileListListAdapter extends BaseAdapter implements ListAdapter {
  65     private final static String PERMISSION_SHARED_WITH_ME = "S";
  66
  67     private static final String TAG = FileListListAdapter.class.getSimpleName();
  68
  69     private Context mContext;
  70     private OCFile mFile = null;
  71     private Vector<OCFile> mFiles = null;
  72     private boolean mJustFolders;
  73
  74     private FileDataStorageManager mStorageManager;
  75     private Account mAccount;
  76     private ComponentsGetter mTransferServiceGetter;
  77
  78     private final Object thumbnailDiskCacheLock = new Object();
  79     private DiskLruImageCache mThumbnailCache;
  80     private boolean mThumbnailCacheStarting = true;
  81     private static final int DISK_CACHE_SIZE = 1024 * 1024 * 10; // 10MB
  82     private static final CompressFormat mCompressFormat = CompressFormat.JPEG;
  83     private static final int mCompressQuality = 70;
  84     private Bitmap defaultImg;
  85
  86     public FileListListAdapter(
  87             boolean justFolders,
  88             Context context,
  89             ComponentsGetter transferServiceGetter
  90             ) {
  91
  92         mJustFolders = justFolders;
  93         mContext = context;
  94         mAccount = AccountUtils.getCurrentOwnCloudAccount(mContext);
  95         mTransferServiceGetter = transferServiceGetter;
  96         defaultImg = BitmapFactory.decodeResource(mContext.getResources(),
  97                     DisplayUtils.getResourceId("image/png", "default.png"));
  98
  99         // Initialise disk cache on background thread
 100         new InitDiskCacheTask().execute();
 101     }
 102
 103     class InitDiskCacheTask extends AsyncTask<File, Void, Void> {
 104         @Override
 105         protected Void doInBackground(File... params) {
 106             synchronized (thumbnailDiskCacheLock) {
 107                 mThumbnailCache = new DiskLruImageCache(mContext, "thumbnailCache",
 108                                     DISK_CACHE_SIZE, mCompressFormat, mCompressQuality);
 109
 110                 mThumbnailCacheStarting = false; // Finished initialization
 111                 thumbnailDiskCacheLock.notifyAll(); // Wake any waiting threads
 112             }
 113             return null;
 114         }
 115     }
 116
 117     static class AsyncDrawable extends BitmapDrawable {
 118         private final WeakReference<ThumbnailGenerationTask> bitmapWorkerTaskReference;
 119
 120         public AsyncDrawable(Resources res, Bitmap bitmap,
 121                 ThumbnailGenerationTask bitmapWorkerTask) {
 122             super(res, bitmap);
 123             bitmapWorkerTaskReference =
 124                 new WeakReference<ThumbnailGenerationTask>(bitmapWorkerTask);
 125         }
 126
 127         public ThumbnailGenerationTask getBitmapWorkerTask() {
 128             return bitmapWorkerTaskReference.get();
 129         }
 130     }
 131
 132     class ThumbnailGenerationTask extends AsyncTask<OCFile, Void, Bitmap> {
 133         private final WeakReference<ImageView> imageViewReference;
 134         private OCFile file;
 135
 136
 137         public ThumbnailGenerationTask(ImageView imageView) {
 138          // Use a WeakReference to ensure the ImageView can be garbage collected
 139             imageViewReference = new WeakReference<ImageView>(imageView);
 140         }
 141
 142         // Decode image in background.
 143         @Override
 144         protected Bitmap doInBackground(OCFile... params) {
 145             Bitmap thumbnail = null;
 146
 147             try {
 148                 file = params[0];
 149                 final String imageKey = String.valueOf(file.getRemoteId());
 150
 151                 // Check disk cache in background thread
 152                 thumbnail = getBitmapFromDiskCache(imageKey);
 153
 154                 // Not found in disk cache
 155                 if (thumbnail == null) {
 156                     // Converts dp to pixel
 157                     Resources r = mContext.getResources();
 158                     int px = (int) Math.round(TypedValue.applyDimension(
 159                             TypedValue.COMPLEX_UNIT_DIP, 150, r.getDisplayMetrics()
 160                     ));
 161
 162                     if (file.isDown()){
 163                         Bitmap bitmap = BitmapUtils.decodeSampledBitmapFromFile(
 164                                 file.getStoragePath(), px, px);
 165
 166                         if (bitmap != null) {
 167                             thumbnail = ThumbnailUtils.extractThumbnail(bitmap, px, px);
 168
 169                             // Add thumbnail to cache
 170                             addBitmapToCache(imageKey, thumbnail);
 171                         }
 172
 173                     } else {
 174                         // Download thumbnail from server
 175                         // Commented out as maybe changes to client library are needed
 176     //                    DefaultHttpClient httpclient = new DefaultHttpClient();
 177     //                    try {
 178     //                        httpclient.getCredentialsProvider().setCredentials(
 179     //                                new AuthScope(mClient.getBaseUri().toString().replace("https://", ""), 443),
 180     //                                new UsernamePasswordCredentials(mClient.getCredentials().getUsername(), mClient.getCredentials().getAuthToken()));
 181     //
 182     //
 183     //                        HttpGet httpget = new HttpGet(mClient.getBaseUri() + "/ocs/v1.php/thumbnail?x=50&y=50&path=" + URLEncoder.encode(file.getRemotePath(), "UTF-8"));
 184     //                        HttpResponse response = httpclient.execute(httpget);
 185     //                        HttpEntity entity = response.getEntity();
 186     //
 187     //                        if (entity != null) {
 188     //                            byte[] bytes = EntityUtils.toByteArray(entity);
 189     //                            Bitmap bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
 190     //                            thumbnail = ThumbnailUtils.extractThumbnail(bitmap, px, px);
 191     //
 192     //                            // Add thumbnail to cache
 193     //                            if (thumbnail != null){
 194     //                                addBitmapToCache(imageKey, thumbnail);
 195     //                            }
 196     //                        }
 197     //                    } catch(Exception e){
 198     //                        e.printStackTrace();
 199     //                    }finally {
 200     //                        httpclient.getConnectionManager().shutdown();
 201     //                    }
 202                     }
 203                 }
 204
 205             } catch (Throwable t) {
 206                 // the app should never break due to a problem with thumbnails
 207                 Log_OC.e(TAG, "Generation of thumbnail for " + file + " failed", t);
 208                 if (t instanceof OutOfMemoryError) {
 209                     System.gc();
 210                 }
 211             }
 212
 213             return thumbnail;
 214         }
 215
 216         protected void onPostExecute(Bitmap bitmap){
 217             if (isCancelled()) {
 218                 bitmap = null;
 219             }
 220
 221             if (imageViewReference != null && bitmap != null) {
 222                 final ImageView imageView = imageViewReference.get();
 223                 final ThumbnailGenerationTask bitmapWorkerTask =
 224                         getBitmapWorkerTask(imageView);
 225                 if (this == bitmapWorkerTask && imageView != null) {
 226                     imageView.setImageBitmap(bitmap);
 227                 }
 228             }
 229         }
 230     }
 231
 232     public void addBitmapToCache(String key, Bitmap bitmap) {
 233         synchronized (thumbnailDiskCacheLock) {
 234             if (mThumbnailCache != null && mThumbnailCache.getBitmap(key) == null) {
 235                 mThumbnailCache.put(key, bitmap);
 236             }
 237         }
 238     }
 239
 240     public Bitmap getBitmapFromDiskCache(String key) {
 241         synchronized (thumbnailDiskCacheLock) {
 242             // Wait while disk cache is started from background thread
 243             while (mThumbnailCacheStarting) {
 244                 try {
 245                     thumbnailDiskCacheLock.wait();
 246                 } catch (InterruptedException e) {}
 247             }
 248             if (mThumbnailCache != null) {
 249                 return (Bitmap) mThumbnailCache.getBitmap(key);
 250             }
 251         }
 252         return null;
 253     }
 254
 255     @Override
 256     public boolean areAllItemsEnabled() {
 257         return true;
 258     }
 259
 260     @Override
 261     public boolean isEnabled(int position) {
 262         return true;
 263     }
 264
 265     @Override
 266     public int getCount() {
 267         return mFiles != null ? mFiles.size() : 0;
 268     }
 269
 270     @Override
 271     public Object getItem(int position) {
 272         if (mFiles == null || mFiles.size() <= position)
 273             return null;
 274         return mFiles.get(position);
 275     }
 276
 277     @Override
 278     public long getItemId(int position) {
 279         if (mFiles == null || mFiles.size() <= position)
 280             return 0;
 281         return mFiles.get(position).getFileId();
 282     }
 283
 284     @Override
 285     public int getItemViewType(int position) {
 286         return 0;
 287     }
 288
 289     @Override
 290     public View getView(int position, View convertView, ViewGroup parent) {
 291         View view = convertView;
 292         if (view == null) {
 293             LayoutInflater inflator = (LayoutInflater) mContext
 294                     .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
 295             view = inflator.inflate(R.layout.list_item, null);
 296         }
 297
 298         if (mFiles != null && mFiles.size() > position) {
 299             OCFile file = mFiles.get(position);
 300             TextView fileName = (TextView) view.findViewById(R.id.Filename);
 301             String name = file.getFileName();
 302
 303             fileName.setText(name);
 304             ImageView fileIcon = (ImageView) view.findViewById(R.id.imageView1);
 305             ImageView sharedIconV = (ImageView) view.findViewById(R.id.sharedIcon);
 306             ImageView sharedWithMeIconV = (ImageView) view.findViewById(R.id.sharedWithMeIcon);
 307             sharedWithMeIconV.setVisibility(View.GONE);
 308
 309             ImageView localStateView = (ImageView) view.findViewById(R.id.imageView2);
 310             localStateView.bringToFront();
 311             FileDownloaderBinder downloaderBinder =
 312                     mTransferServiceGetter.getFileDownloaderBinder();
 313             FileUploaderBinder uploaderBinder = mTransferServiceGetter.getFileUploaderBinder();
 314             if (downloaderBinder != null && downloaderBinder.isDownloading(mAccount, file)) {
 315                 localStateView.setImageResource(R.drawable.downloading_file_indicator);
 316                 localStateView.setVisibility(View.VISIBLE);
 317             } else if (uploaderBinder != null && uploaderBinder.isUploading(mAccount, file)) {
 318                 localStateView.setImageResource(R.drawable.uploading_file_indicator);
 319                 localStateView.setVisibility(View.VISIBLE);
 320             } else if (file.isDown()) {
 321                 localStateView.setImageResource(R.drawable.local_file_indicator);
 322                 localStateView.setVisibility(View.VISIBLE);
 323             } else {
 324                 localStateView.setVisibility(View.INVISIBLE);
 325             }
 326
 327             TextView fileSizeV = (TextView) view.findViewById(R.id.file_size);
 328             TextView lastModV = (TextView) view.findViewById(R.id.last_mod);
 329             ImageView checkBoxV = (ImageView) view.findViewById(R.id.custom_checkbox);
 330
 331             if (!file.isFolder()) {
 332                 fileSizeV.setVisibility(View.VISIBLE);
 333                 fileSizeV.setText(DisplayUtils.bytesToHumanReadable(file.getFileLength()));
 334                 lastModV.setVisibility(View.VISIBLE);
 335                 lastModV.setText(
 336                         DisplayUtils.unixTimeToHumanReadable(file.getModificationTimestamp())
 337                 );
 338                 // this if-else is needed even thoe fav icon is visible by default
 339                 // because android reuses views in listview
 340                 if (!file.keepInSync()) {
 341                     view.findViewById(R.id.imageView3).setVisibility(View.GONE);
 342                 } else {
 343                     view.findViewById(R.id.imageView3).setVisibility(View.VISIBLE);
 344                 }
 345
 346                 ListView parentList = (ListView)parent;
 347                 if (parentList.getChoiceMode() == ListView.CHOICE_MODE_NONE) {
 348                     checkBoxV.setVisibility(View.GONE);
 349                 } else {
 350                     if (parentList.isItemChecked(position)) {
 351                         checkBoxV.setImageResource(android.R.drawable.checkbox_on_background);
 352                     } else {
 353                         checkBoxV.setImageResource(android.R.drawable.checkbox_off_background);
 354                     }
 355                     checkBoxV.setVisibility(View.VISIBLE);
 356                 }
 357
 358                 // get Thumbnail if file is image
 359                 if (file.isImage()){
 360                      // Thumbnail in Cache?
 361                     Bitmap thumbnail = getBitmapFromDiskCache(String.valueOf(file.getRemoteId()));
 362                     if (thumbnail != null){
 363                         fileIcon.setImageBitmap(thumbnail);
 364                     } else {
 365                         // generate new Thumbnail
 366                         if (cancelPotentialWork(file, fileIcon)) {
 367                             final ThumbnailGenerationTask task =
 368                                     new ThumbnailGenerationTask(fileIcon);
 369                             final AsyncDrawable asyncDrawable =
 370                                     new AsyncDrawable(mContext.getResources(), defaultImg, task);
 371                             fileIcon.setImageDrawable(asyncDrawable);
 372                             task.execute(file);
 373                         }
 374                     }
 375                 } else {
 376                     fileIcon.setImageResource(
 377                             DisplayUtils.getResourceId(file.getMimetype(), file.getFileName())
 378                     );
 379                 }
 380
 381                 if (checkIfFileIsSharedWithMe(file)) {
 382                     sharedWithMeIconV.setVisibility(View.VISIBLE);
 383                 }
 384             }
 385             else {
 386                 fileSizeV.setVisibility(View.INVISIBLE);
 387                 //fileSizeV.setText(DisplayUtils.bytesToHumanReadable(file.getFileLength()));
 388                 lastModV.setVisibility(View.VISIBLE);
 389                 lastModV.setText(
 390                         DisplayUtils.unixTimeToHumanReadable(file.getModificationTimestamp())
 391                 );
 392                 checkBoxV.setVisibility(View.GONE);
 393                 view.findViewById(R.id.imageView3).setVisibility(View.GONE);
 394
 395                 if (checkIfFileIsSharedWithMe(file)) {
 396                     fileIcon.setImageResource(R.drawable.shared_with_me_folder);
 397                     sharedWithMeIconV.setVisibility(View.VISIBLE);
 398                 } else {
 399                     fileIcon.setImageResource(
 400                             DisplayUtils.getResourceId(file.getMimetype(), file.getFileName())
 401                     );
 402                 }
 403
 404                 // If folder is sharedByLink, icon folder must be changed to
 405                 // folder-public one
 406                 if (file.isShareByLink()) {
 407                     fileIcon.setImageResource(R.drawable.folder_public);
 408                 }
 409             }
 410
 411             if (file.isShareByLink()) {
 412                 sharedIconV.setVisibility(View.VISIBLE);
 413             } else {
 414                 sharedIconV.setVisibility(View.GONE);
 415             }
 416         }
 417
 418         return view;
 419     }
 420
 421     public static boolean cancelPotentialWork(OCFile file, ImageView imageView) {
 422         final ThumbnailGenerationTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
 423
 424         if (bitmapWorkerTask != null) {
 425             final OCFile bitmapData = bitmapWorkerTask.file;
 426             // If bitmapData is not yet set or it differs from the new data
 427             if (bitmapData == null || bitmapData != file) {
 428                 // Cancel previous task
 429                 bitmapWorkerTask.cancel(true);
 430             } else {
 431                 // The same work is already in progress
 432                 return false;
 433             }
 434         }
 435         // No task associated with the ImageView, or an existing task was cancelled
 436         return true;
 437     }
 438
 439     private static ThumbnailGenerationTask getBitmapWorkerTask(ImageView imageView) {
 440         if (imageView != null) {
 441             final Drawable drawable = imageView.getDrawable();
 442             if (drawable instanceof AsyncDrawable) {
 443                 final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
 444                 return asyncDrawable.getBitmapWorkerTask();
 445             }
 446          }
 447          return null;
 448      }
 449
 450     @Override
 451     public int getViewTypeCount() {
 452         return 1;
 453     }
 454
 455     @Override
 456     public boolean hasStableIds() {
 457         return true;
 458     }
 459
 460     @Override
 461     public boolean isEmpty() {
 462         return (mFiles == null || mFiles.isEmpty());
 463     }
 464
 465     /**
 466      * Change the adapted directory for a new one
 467      * @param directory                 New file to adapt. Can be NULL, meaning
 468      *                                  "no content to adapt".
 469      * @param updatedStorageManager     Optional updated storage manager; used to replace
 470      *                                  mStorageManager if is different (and not NULL)
 471      */
 472     public void swapDirectory(OCFile directory, FileDataStorageManager updatedStorageManager) {
 473         mFile = directory;
 474         if (updatedStorageManager != null && updatedStorageManager != mStorageManager) {
 475             mStorageManager = updatedStorageManager;
 476             mAccount = AccountUtils.getCurrentOwnCloudAccount(mContext);
 477         }
 478         if (mStorageManager != null) {
 479             mFiles = mStorageManager.getFolderContent(mFile);
 480             if (mJustFolders) {
 481                 mFiles = getFolders(mFiles);
 482             }
 483         } else {
 484             mFiles = null;
 485         }
 486         notifyDataSetChanged();
 487     }
 488
 489
 490     /**
 491      * Filter for getting only the folders
 492      * @param files
 493      * @return Vector<OCFile>
 494      */
 495     public Vector<OCFile> getFolders(Vector<OCFile> files) {
 496         Vector<OCFile> ret = new Vector<OCFile>();
 497         OCFile current = null;
 498         for (int i=0; i<files.size(); i++) {
 499             current = files.get(i);
 500             if (current.isFolder()) {
 501                 ret.add(current);
 502             }
 503         }
 504         return ret;
 505     }
 506
 507
 508     /**
 509      * Check if parent folder does not include 'S' permission and if file/folder
 510      * is shared with me
 511      *
 512      * @param file: OCFile
 513      * @return boolean: True if it is shared with me and false if it is not
 514      */
 515     private boolean checkIfFileIsSharedWithMe(OCFile file) {
 516         return (mFile.getPermissions() != null
 517                 && !mFile.getPermissions().contains(PERMISSION_SHARED_WITH_ME)
 518                 && file.getPermissions() != null
 519                 && file.getPermissions().contains(PERMISSION_SHARED_WITH_ME));
 520     }
 521 }