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