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