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                 try {
 108                     mThumbnailCache = new DiskLruImageCache(mContext, "thumbnailCache",
 109                                         DISK_CACHE_SIZE, mCompressFormat, mCompressQuality);
 110                 } catch (Exception e) {
 111                     Log_OC.d(TAG, "Thumbnail cache could not be opened ", e);
 112                     mThumbnailCache = null;
 113                 }
 114                 mThumbnailCacheStarting = false; // Finished initialization
 115                 thumbnailDiskCacheLock.notifyAll(); // Wake any waiting threads
 116             }
 117             return null;
 118         }
 119     }
 120
 121     static class AsyncDrawable extends BitmapDrawable {
 122         private final WeakReference<ThumbnailGenerationTask> bitmapWorkerTaskReference;
 123
 124         public AsyncDrawable(Resources res, Bitmap bitmap,
 125                 ThumbnailGenerationTask bitmapWorkerTask) {
 126             super(res, bitmap);
 127             bitmapWorkerTaskReference =
 128                 new WeakReference<ThumbnailGenerationTask>(bitmapWorkerTask);
 129         }
 130
 131         public ThumbnailGenerationTask getBitmapWorkerTask() {
 132             return bitmapWorkerTaskReference.get();
 133         }
 134     }
 135
 136     class ThumbnailGenerationTask extends AsyncTask<OCFile, Void, Bitmap> {
 137         private final WeakReference<ImageView> imageViewReference;
 138         private OCFile file;
 139
 140
 141         public ThumbnailGenerationTask(ImageView imageView) {
 142          // Use a WeakReference to ensure the ImageView can be garbage collected
 143             imageViewReference = new WeakReference<ImageView>(imageView);
 144         }
 145
 146         // Decode image in background.
 147         @Override
 148         protected Bitmap doInBackground(OCFile... params) {
 149             Bitmap thumbnail = null;
 150
 151             try {
 152                 file = params[0];
 153                 final String imageKey = String.valueOf(file.getRemoteId());
 154
 155                 // Check disk cache in background thread
 156                 thumbnail = getBitmapFromDiskCache(imageKey);
 157
 158                 // Not found in disk cache
 159                 if (thumbnail == null) {
 160                     // Converts dp to pixel
 161                     Resources r = mContext.getResources();
 162                     int px = (int) Math.round(TypedValue.applyDimension(
 163                             TypedValue.COMPLEX_UNIT_DIP, 150, r.getDisplayMetrics()
 164                     ));
 165
 166                     if (file.isDown()){
 167                         Bitmap bitmap = BitmapUtils.decodeSampledBitmapFromFile(
 168                                 file.getStoragePath(), px, px);
 169
 170                         if (bitmap != null) {
 171                             thumbnail = ThumbnailUtils.extractThumbnail(bitmap, px, px);
 172
 173                             // Add thumbnail to cache
 174                             addBitmapToCache(imageKey, thumbnail);
 175                         }
 176
 177                     } else {
 178                         // Download thumbnail from server
 179                         // Commented out as maybe changes to client library are needed
 180     //                    DefaultHttpClient httpclient = new DefaultHttpClient();
 181     //                    try {
 182     //                        httpclient.getCredentialsProvider().setCredentials(
 183     //                                new AuthScope(mClient.getBaseUri().toString().replace("https://", ""), 443),
 184     //                                new UsernamePasswordCredentials(mClient.getCredentials().getUsername(), mClient.getCredentials().getAuthToken()));
 185     //
 186     //
 187     //                        HttpGet httpget = new HttpGet(mClient.getBaseUri() + "/ocs/v1.php/thumbnail?x=50&y=50&path=" + URLEncoder.encode(file.getRemotePath(), "UTF-8"));
 188     //                        HttpResponse response = httpclient.execute(httpget);
 189     //                        HttpEntity entity = response.getEntity();
 190     //
 191     //                        if (entity != null) {
 192     //                            byte[] bytes = EntityUtils.toByteArray(entity);
 193     //                            Bitmap bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);
 194     //                            thumbnail = ThumbnailUtils.extractThumbnail(bitmap, px, px);
 195     //
 196     //                            // Add thumbnail to cache
 197     //                            if (thumbnail != null){
 198     //                                addBitmapToCache(imageKey, thumbnail);
 199     //                            }
 200     //                        }
 201     //                    } catch(Exception e){
 202     //                        e.printStackTrace();
 203     //                    }finally {
 204     //                        httpclient.getConnectionManager().shutdown();
 205     //                    }
 206                     }
 207                 }
 208
 209             } catch (Throwable t) {
 210                 // the app should never break due to a problem with thumbnails
 211                 Log_OC.e(TAG, "Generation of thumbnail for " + file + " failed", t);
 212                 if (t instanceof OutOfMemoryError) {
 213                     System.gc();
 214                 }
 215             }
 216
 217             return thumbnail;
 218         }
 219
 220         protected void onPostExecute(Bitmap bitmap){
 221             if (isCancelled()) {
 222                 bitmap = null;
 223             }
 224
 225             if (imageViewReference != null && bitmap != null) {
 226                 final ImageView imageView = imageViewReference.get();
 227                 final ThumbnailGenerationTask bitmapWorkerTask =
 228                         getBitmapWorkerTask(imageView);
 229                 if (this == bitmapWorkerTask && imageView != null) {
 230                     imageView.setImageBitmap(bitmap);
 231                 }
 232             }
 233         }
 234     }
 235
 236     public void addBitmapToCache(String key, Bitmap bitmap) {
 237         synchronized (thumbnailDiskCacheLock) {
 238             if (mThumbnailCache != null && mThumbnailCache.getBitmap(key) == null) {
 239                 mThumbnailCache.put(key, bitmap);
 240             }
 241         }
 242     }
 243
 244     public Bitmap getBitmapFromDiskCache(String key) {
 245         synchronized (thumbnailDiskCacheLock) {
 246             // Wait while disk cache is started from background thread
 247             while (mThumbnailCacheStarting) {
 248                 try {
 249                     thumbnailDiskCacheLock.wait();
 250                 } catch (InterruptedException e) {}
 251             }
 252             if (mThumbnailCache != null) {
 253                 return (Bitmap) mThumbnailCache.getBitmap(key);
 254             }
 255         }
 256         return null;
 257     }
 258
 259     @Override
 260     public boolean areAllItemsEnabled() {
 261         return true;
 262     }
 263
 264     @Override
 265     public boolean isEnabled(int position) {
 266         return true;
 267     }
 268
 269     @Override
 270     public int getCount() {
 271         return mFiles != null ? mFiles.size() : 0;
 272     }
 273
 274     @Override
 275     public Object getItem(int position) {
 276         if (mFiles == null || mFiles.size() <= position)
 277             return null;
 278         return mFiles.get(position);
 279     }
 280
 281     @Override
 282     public long getItemId(int position) {
 283         if (mFiles == null || mFiles.size() <= position)
 284             return 0;
 285         return mFiles.get(position).getFileId();
 286     }
 287
 288     @Override
 289     public int getItemViewType(int position) {
 290         return 0;
 291     }
 292
 293     @Override
 294     public View getView(int position, View convertView, ViewGroup parent) {
 295         View view = convertView;
 296         if (view == null) {
 297             LayoutInflater inflator = (LayoutInflater) mContext
 298                     .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
 299             view = inflator.inflate(R.layout.list_item, null);
 300         }
 301
 302         if (mFiles != null && mFiles.size() > position) {
 303             OCFile file = mFiles.get(position);
 304             TextView fileName = (TextView) view.findViewById(R.id.Filename);
 305             String name = file.getFileName();
 306
 307             fileName.setText(name);
 308             ImageView fileIcon = (ImageView) view.findViewById(R.id.imageView1);
 309             ImageView sharedIconV = (ImageView) view.findViewById(R.id.sharedIcon);
 310             ImageView sharedWithMeIconV = (ImageView) view.findViewById(R.id.sharedWithMeIcon);
 311             sharedWithMeIconV.setVisibility(View.GONE);
 312
 313             ImageView localStateView = (ImageView) view.findViewById(R.id.imageView2);
 314             localStateView.bringToFront();
 315             FileDownloaderBinder downloaderBinder =
 316                     mTransferServiceGetter.getFileDownloaderBinder();
 317             FileUploaderBinder uploaderBinder = mTransferServiceGetter.getFileUploaderBinder();
 318             if (downloaderBinder != null && downloaderBinder.isDownloading(mAccount, file)) {
 319                 localStateView.setImageResource(R.drawable.downloading_file_indicator);
 320                 localStateView.setVisibility(View.VISIBLE);
 321             } else if (uploaderBinder != null && uploaderBinder.isUploading(mAccount, file)) {
 322                 localStateView.setImageResource(R.drawable.uploading_file_indicator);
 323                 localStateView.setVisibility(View.VISIBLE);
 324             } else if (file.isDown()) {
 325                 localStateView.setImageResource(R.drawable.local_file_indicator);
 326                 localStateView.setVisibility(View.VISIBLE);
 327             } else {
 328                 localStateView.setVisibility(View.INVISIBLE);
 329             }
 330
 331             TextView fileSizeV = (TextView) view.findViewById(R.id.file_size);
 332             TextView lastModV = (TextView) view.findViewById(R.id.last_mod);
 333             ImageView checkBoxV = (ImageView) view.findViewById(R.id.custom_checkbox);
 334
 335             if (!file.isFolder()) {
 336                 fileSizeV.setVisibility(View.VISIBLE);
 337                 fileSizeV.setText(DisplayUtils.bytesToHumanReadable(file.getFileLength()));
 338                 lastModV.setVisibility(View.VISIBLE);
 339                 lastModV.setText(
 340                         DisplayUtils.unixTimeToHumanReadable(file.getModificationTimestamp())
 341                 );
 342                 // this if-else is needed even thoe fav icon is visible by default
 343                 // because android reuses views in listview
 344                 if (!file.keepInSync()) {
 345                     view.findViewById(R.id.imageView3).setVisibility(View.GONE);
 346                 } else {
 347                     view.findViewById(R.id.imageView3).setVisibility(View.VISIBLE);
 348                 }
 349
 350                 ListView parentList = (ListView)parent;
 351                 if (parentList.getChoiceMode() == ListView.CHOICE_MODE_NONE) {
 352                     checkBoxV.setVisibility(View.GONE);
 353                 } else {
 354                     if (parentList.isItemChecked(position)) {
 355                         checkBoxV.setImageResource(android.R.drawable.checkbox_on_background);
 356                     } else {
 357                         checkBoxV.setImageResource(android.R.drawable.checkbox_off_background);
 358                     }
 359                     checkBoxV.setVisibility(View.VISIBLE);
 360                 }
 361
 362                 // get Thumbnail if file is image
 363                 if (file.isImage()){
 364                      // Thumbnail in Cache?
 365                     Bitmap thumbnail = getBitmapFromDiskCache(String.valueOf(file.getRemoteId()));
 366                     if (thumbnail != null){
 367                         fileIcon.setImageBitmap(thumbnail);
 368                     } else {
 369                         // generate new Thumbnail
 370                         if (cancelPotentialWork(file, fileIcon)) {
 371                             final ThumbnailGenerationTask task =
 372                                     new ThumbnailGenerationTask(fileIcon);
 373                             final AsyncDrawable asyncDrawable =
 374                                     new AsyncDrawable(mContext.getResources(), defaultImg, task);
 375                             fileIcon.setImageDrawable(asyncDrawable);
 376                             task.execute(file);
 377                         }
 378                     }
 379                 } else {
 380                     fileIcon.setImageResource(
 381                             DisplayUtils.getResourceId(file.getMimetype(), file.getFileName())
 382                     );
 383                 }
 384
 385                 if (checkIfFileIsSharedWithMe(file)) {
 386                     sharedWithMeIconV.setVisibility(View.VISIBLE);
 387                 }
 388             }
 389             else {
 390                 fileSizeV.setVisibility(View.INVISIBLE);
 391                 //fileSizeV.setText(DisplayUtils.bytesToHumanReadable(file.getFileLength()));
 392                 lastModV.setVisibility(View.VISIBLE);
 393                 lastModV.setText(
 394                         DisplayUtils.unixTimeToHumanReadable(file.getModificationTimestamp())
 395                 );
 396                 checkBoxV.setVisibility(View.GONE);
 397                 view.findViewById(R.id.imageView3).setVisibility(View.GONE);
 398
 399                 if (checkIfFileIsSharedWithMe(file)) {
 400                     fileIcon.setImageResource(R.drawable.shared_with_me_folder);
 401                     sharedWithMeIconV.setVisibility(View.VISIBLE);
 402                 } else {
 403                     fileIcon.setImageResource(
 404                             DisplayUtils.getResourceId(file.getMimetype(), file.getFileName())
 405                     );
 406                 }
 407
 408                 // If folder is sharedByLink, icon folder must be changed to
 409                 // folder-public one
 410                 if (file.isShareByLink()) {
 411                     fileIcon.setImageResource(R.drawable.folder_public);
 412                 }
 413             }
 414
 415             if (file.isShareByLink()) {
 416                 sharedIconV.setVisibility(View.VISIBLE);
 417             } else {
 418                 sharedIconV.setVisibility(View.GONE);
 419             }
 420         }
 421
 422         return view;
 423     }
 424
 425     public static boolean cancelPotentialWork(OCFile file, ImageView imageView) {
 426         final ThumbnailGenerationTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
 427
 428         if (bitmapWorkerTask != null) {
 429             final OCFile bitmapData = bitmapWorkerTask.file;
 430             // If bitmapData is not yet set or it differs from the new data
 431             if (bitmapData == null || bitmapData != file) {
 432                 // Cancel previous task
 433                 bitmapWorkerTask.cancel(true);
 434             } else {
 435                 // The same work is already in progress
 436                 return false;
 437             }
 438         }
 439         // No task associated with the ImageView, or an existing task was cancelled
 440         return true;
 441     }
 442
 443     private static ThumbnailGenerationTask getBitmapWorkerTask(ImageView imageView) {
 444         if (imageView != null) {
 445             final Drawable drawable = imageView.getDrawable();
 446             if (drawable instanceof AsyncDrawable) {
 447                 final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
 448                 return asyncDrawable.getBitmapWorkerTask();
 449             }
 450          }
 451          return null;
 452      }
 453
 454     @Override
 455     public int getViewTypeCount() {
 456         return 1;
 457     }
 458
 459     @Override
 460     public boolean hasStableIds() {
 461         return true;
 462     }
 463
 464     @Override
 465     public boolean isEmpty() {
 466         return (mFiles == null || mFiles.isEmpty());
 467     }
 468
 469     /**
 470      * Change the adapted directory for a new one
 471      * @param directory                 New file to adapt. Can be NULL, meaning
 472      *                                  "no content to adapt".
 473      * @param updatedStorageManager     Optional updated storage manager; used to replace
 474      *                                  mStorageManager if is different (and not NULL)
 475      */
 476     public void swapDirectory(OCFile directory, FileDataStorageManager updatedStorageManager) {
 477         mFile = directory;
 478         if (updatedStorageManager != null && updatedStorageManager != mStorageManager) {
 479             mStorageManager = updatedStorageManager;
 480             mAccount = AccountUtils.getCurrentOwnCloudAccount(mContext);
 481         }
 482         if (mStorageManager != null) {
 483             mFiles = mStorageManager.getFolderContent(mFile);
 484             if (mJustFolders) {
 485                 mFiles = getFolders(mFiles);
 486             }
 487         } else {
 488             mFiles = null;
 489         }
 490         notifyDataSetChanged();
 491     }
 492
 493
 494     /**
 495      * Filter for getting only the folders
 496      * @param files
 497      * @return Vector<OCFile>
 498      */
 499     public Vector<OCFile> getFolders(Vector<OCFile> files) {
 500         Vector<OCFile> ret = new Vector<OCFile>();
 501         OCFile current = null;
 502         for (int i=0; i<files.size(); i++) {
 503             current = files.get(i);
 504             if (current.isFolder()) {
 505                 ret.add(current);
 506             }
 507         }
 508         return ret;
 509     }
 510
 511
 512     /**
 513      * Check if parent folder does not include 'S' permission and if file/folder
 514      * is shared with me
 515      *
 516      * @param file: OCFile
 517      * @return boolean: True if it is shared with me and false if it is not
 518      */
 519     private boolean checkIfFileIsSharedWithMe(OCFile file) {
 520         return (mFile.getPermissions() != null
 521                 && !mFile.getPermissions().contains(PERMISSION_SHARED_WITH_ME)
 522                 && file.getPermissions() != null
 523                 && file.getPermissions().contains(PERMISSION_SHARED_WITH_ME));
 524     }
 525 }