src/com/owncloud/android/ui/preview/PreviewMediaFragment.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012-2013 ownCloud Inc.
   3  *
   4  *   This program is free software: you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License as published by
   6  *   the Free Software Foundation, either version 2 of the License, or
   7  *   (at your option) any later version.
   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.preview;
  19
  20 import java.io.File;
  21 import java.util.ArrayList;
  22 import java.util.List;
  23
  24 import android.accounts.Account;
  25 import android.app.Activity;
  26 import android.app.AlertDialog;
  27 import android.content.ActivityNotFoundException;
  28 import android.content.ComponentName;
  29 import android.content.Context;
  30 import android.content.DialogInterface;
  31 import android.content.Intent;
  32 import android.content.ServiceConnection;
  33 import android.media.MediaPlayer;
  34 import android.media.MediaPlayer.OnCompletionListener;
  35 import android.media.MediaPlayer.OnErrorListener;
  36 import android.media.MediaPlayer.OnPreparedListener;
  37 import android.net.Uri;
  38 import android.os.Bundle;
  39 import android.os.Handler;
  40 import android.os.IBinder;
  41 import android.support.v4.app.FragmentTransaction;
  42 import android.util.Log;
  43 import android.view.LayoutInflater;
  44 import android.view.MotionEvent;
  45 import android.view.View;
  46 import android.view.View.OnTouchListener;
  47 import android.view.ViewGroup;
  48 import android.webkit.MimeTypeMap;
  49 import android.widget.ImageView;
  50 import android.widget.Toast;
  51 import android.widget.VideoView;
  52
  53 import com.actionbarsherlock.app.SherlockFragment;
  54 import com.actionbarsherlock.view.Menu;
  55 import com.actionbarsherlock.view.MenuInflater;
  56 import com.actionbarsherlock.view.MenuItem;
  57 import com.owncloud.android.datamodel.FileDataStorageManager;
  58 import com.owncloud.android.datamodel.OCFile;
  59 import com.owncloud.android.media.MediaControlView;
  60 import com.owncloud.android.media.MediaService;
  61 import com.owncloud.android.media.MediaServiceBinder;
  62 import com.owncloud.android.network.OwnCloudClientUtils;
  63 import com.owncloud.android.operations.OnRemoteOperationListener;
  64 import com.owncloud.android.operations.RemoteOperation;
  65 import com.owncloud.android.operations.RemoteOperationResult;
  66 import com.owncloud.android.operations.RemoveFileOperation;
  67 import com.owncloud.android.ui.activity.FileDetailActivity;
  68 import com.owncloud.android.ui.activity.FileDisplayActivity;
  69 import com.owncloud.android.ui.fragment.ConfirmationDialogFragment;
  70 import com.owncloud.android.ui.fragment.FileDetailFragment;
  71 import com.owncloud.android.ui.fragment.FileFragment;
  72
  73 import com.owncloud.android.R;
  74 import eu.alefzero.webdav.WebdavClient;
  75 import eu.alefzero.webdav.WebdavUtils;
  76
  77 /**
  78  * This fragment shows a preview of a downloaded media file (audio or video).
  79  *
  80  * Trying to get an instance with NULL {@link OCFile} or ownCloud {@link Account} values will produce an {@link IllegalStateException}.
  81  *
  82  * By now, if the {@link OCFile} passed is not downloaded, an {@link IllegalStateException} is generated on instantiation too.
  83  *
  84  * @author David A. Velasco
  85  */
  86 public class PreviewMediaFragment extends SherlockFragment implements
  87         OnTouchListener , FileFragment,
  88         ConfirmationDialogFragment.ConfirmationDialogFragmentListener, OnRemoteOperationListener  {
  89
  90     public static final String EXTRA_FILE = "FILE";
  91     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  92     private static final String EXTRA_PLAY_POSITION = "PLAY_POSITION";
  93     private static final String EXTRA_PLAYING = "PLAYING";
  94
  95     private View mView;
  96     private OCFile mFile;
  97     private Account mAccount;
  98     private FileDataStorageManager mStorageManager;
  99     private ImageView mImagePreview;
 100     private VideoView mVideoPreview;
 101     private int mSavedPlaybackPosition;
 102
 103     private Handler mHandler;
 104     private RemoteOperation mLastRemoteOperation;
 105
 106     private MediaServiceBinder mMediaServiceBinder = null;
 107     private MediaControlView mMediaController = null;
 108     private MediaServiceConnection mMediaServiceConnection = null;
 109     private VideoHelper mVideoHelper;
 110     private boolean mAutoplay;
 111
 112     private static final String TAG = PreviewMediaFragment.class.getSimpleName();
 113
 114
 115     /**
 116      * Creates a fragment to preview a file.
 117      *
 118      * When 'fileToDetail' or 'ocAccount' are null
 119      *
 120      * @param fileToDetail      An {@link OCFile} to preview in the fragment
 121      * @param ocAccount         An ownCloud account; needed to start downloads
 122      */
 123     public PreviewMediaFragment(OCFile fileToDetail, Account ocAccount) {
 124         mFile = fileToDetail;
 125         mAccount = ocAccount;
 126         mSavedPlaybackPosition = 0;
 127         mStorageManager = null; // we need a context to init this; the container activity is not available yet at this moment
 128         mAutoplay = true;
 129     }
 130
 131
 132     /**
 133      *  Creates an empty fragment for previews.
 134      *
 135      *  MUST BE KEPT: the system uses it when tries to reinstantiate a fragment automatically (for instance, when the device is turned a aside).
 136      *
 137      *  DO NOT CALL IT: an {@link OCFile} and {@link Account} must be provided for a successful construction
 138      */
 139     public PreviewMediaFragment() {
 140         mFile = null;
 141         mAccount = null;
 142         mSavedPlaybackPosition = 0;
 143         mStorageManager = null;
 144         mAutoplay = true;
 145     }
 146
 147
 148     /**
 149      * {@inheritDoc}
 150      */
 151     @Override
 152     public void onCreate(Bundle savedInstanceState) {
 153         super.onCreate(savedInstanceState);
 154         mHandler = new Handler();
 155         setHasOptionsMenu(true);
 156     }
 157
 158
 159     /**
 160      * {@inheritDoc}
 161      */
 162     @Override
 163     public View onCreateView(LayoutInflater inflater, ViewGroup container,
 164             Bundle savedInstanceState) {
 165         super.onCreateView(inflater, container, savedInstanceState);
 166
 167         mView = inflater.inflate(R.layout.file_preview, container, false);
 168
 169         mImagePreview = (ImageView)mView.findViewById(R.id.image_preview);
 170         mVideoPreview = (VideoView)mView.findViewById(R.id.video_preview);
 171         mVideoPreview.setOnTouchListener(this);
 172
 173         mMediaController = (MediaControlView)mView.findViewById(R.id.media_controller);
 174
 175         return mView;
 176     }
 177
 178
 179     /**
 180      * {@inheritDoc}
 181      */
 182     @Override
 183     public void onAttach(Activity activity) {
 184         super.onAttach(activity);
 185         if (!(activity instanceof FileFragment.ContainerActivity))
 186             throw new ClassCastException(activity.toString() + " must implement " + FileFragment.ContainerActivity.class.getSimpleName());
 187     }
 188
 189
 190     /**
 191      * {@inheritDoc}
 192      */
 193     @Override
 194     public void onActivityCreated(Bundle savedInstanceState) {
 195         super.onActivityCreated(savedInstanceState);
 196
 197         mStorageManager = new FileDataStorageManager(mAccount, getActivity().getApplicationContext().getContentResolver());
 198         if (savedInstanceState != null) {
 199             mFile = savedInstanceState.getParcelable(PreviewMediaFragment.EXTRA_FILE);
 200             mAccount = savedInstanceState.getParcelable(PreviewMediaFragment.EXTRA_ACCOUNT);
 201             mSavedPlaybackPosition = savedInstanceState.getInt(PreviewMediaFragment.EXTRA_PLAY_POSITION);
 202             mAutoplay = savedInstanceState.getBoolean(PreviewMediaFragment.EXTRA_PLAYING);
 203
 204         }
 205         if (mFile == null) {
 206             throw new IllegalStateException("Instanced with a NULL OCFile");
 207         }
 208         if (mAccount == null) {
 209             throw new IllegalStateException("Instanced with a NULL ownCloud Account");
 210         }
 211         if (!mFile.isDown()) {
 212             throw new IllegalStateException("There is no local file to preview");
 213         }
 214         if (mFile.isVideo()) {
 215             mVideoPreview.setVisibility(View.VISIBLE);
 216             mImagePreview.setVisibility(View.GONE);
 217             prepareVideo();
 218
 219         } else {
 220             mVideoPreview.setVisibility(View.GONE);
 221             mImagePreview.setVisibility(View.VISIBLE);
 222         }
 223
 224     }
 225
 226
 227     /**
 228      * {@inheritDoc}
 229      */
 230     @Override
 231     public void onSaveInstanceState(Bundle outState) {
 232         super.onSaveInstanceState(outState);
 233
 234         outState.putParcelable(PreviewMediaFragment.EXTRA_FILE, mFile);
 235         outState.putParcelable(PreviewMediaFragment.EXTRA_ACCOUNT, mAccount);
 236
 237         if (mFile.isVideo()) {
 238             outState.putInt(PreviewMediaFragment.EXTRA_PLAY_POSITION , mVideoPreview.getCurrentPosition());
 239             outState.putBoolean(PreviewMediaFragment.EXTRA_PLAYING , mVideoPreview.isPlaying());
 240         }
 241     }
 242
 243
 244     @Override
 245     public void onStart() {
 246         super.onStart();
 247
 248         if (mFile != null) {
 249            if (mFile.isAudio()) {
 250                bindMediaService();
 251
 252            } else if (mFile.isVideo()) {
 253                stopAudio();
 254                playVideo();
 255            }
 256         }
 257     }
 258
 259
 260     private void stopAudio() {
 261         Intent i = new Intent(getSherlockActivity(), MediaService.class);
 262         i.setAction(MediaService.ACTION_STOP_ALL);
 263         getSherlockActivity().startService(i);
 264     }
 265
 266
 267     /**
 268      * {@inheritDoc}
 269      */
 270     @Override
 271     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
 272         super.onCreateOptionsMenu(menu, inflater);
 273
 274         inflater.inflate(R.menu.file_actions_menu, menu);
 275         List<Integer> toHide = new ArrayList<Integer>();
 276
 277         MenuItem item = null;
 278         toHide.add(R.id.action_cancel_download);
 279         toHide.add(R.id.action_cancel_upload);
 280         toHide.add(R.id.action_download_file);
 281         toHide.add(R.id.action_rename_file);    // by now
 282
 283         for (int i : toHide) {
 284             item = menu.findItem(i);
 285             if (item != null) {
 286                 item.setVisible(false);
 287                 item.setEnabled(false);
 288             }
 289         }
 290
 291     }
 292
 293
 294     /**
 295      * {@inheritDoc}
 296      */
 297     @Override
 298     public boolean onOptionsItemSelected(MenuItem item) {
 299         switch (item.getItemId()) {
 300             case R.id.action_open_file_with: {
 301                 openFile();
 302                 return true;
 303             }
 304             case R.id.action_remove_file: {
 305                 removeFile();
 306                 return true;
 307             }
 308             case R.id.action_see_details: {
 309                 seeDetails();
 310                 return true;
 311             }
 312
 313             default:
 314                 return false;
 315         }
 316     }
 317
 318
 319     private void seeDetails() {
 320         stopPreview(false);
 321         ((FileFragment.ContainerActivity)getActivity()).showFragmentWithDetails(mFile);
 322     }
 323
 324
 325     private void prepareVideo() {
 326         // create helper to get more control on the playback
 327         mVideoHelper = new VideoHelper();
 328         mVideoPreview.setOnPreparedListener(mVideoHelper);
 329         mVideoPreview.setOnCompletionListener(mVideoHelper);
 330         mVideoPreview.setOnErrorListener(mVideoHelper);
 331     }
 332
 333     private void playVideo() {
 334         // create and prepare control panel for the user
 335         mMediaController.setMediaPlayer(mVideoPreview);
 336
 337         // load the video file in the video player ; when done, VideoHelper#onPrepared() will be called
 338         mVideoPreview.setVideoPath(mFile.getStoragePath());
 339     }
 340
 341
 342     private class VideoHelper implements OnCompletionListener, OnPreparedListener, OnErrorListener {
 343
 344         /**
 345          * Called when the file is ready to be played.
 346          *
 347          * Just starts the playback.
 348          *
 349          * @param   mp    {@link MediaPlayer} instance performing the playback.
 350          */
 351         @Override
 352         public void onPrepared(MediaPlayer vp) {
 353             mVideoPreview.seekTo(mSavedPlaybackPosition);
 354             if (mAutoplay) {
 355                 mVideoPreview.start();
 356             }
 357             mMediaController.setEnabled(true);
 358             mMediaController.updatePausePlay();
 359         }
 360
 361
 362         /**
 363          * Called when the file is finished playing.
 364          *
 365          * Finishes the activity.
 366          *
 367          * @param   mp    {@link MediaPlayer} instance performing the playback.
 368          */
 369         @Override
 370         public void onCompletion(MediaPlayer  mp) {
 371             mVideoPreview.seekTo(0);
 372             mMediaController.updatePausePlay();
 373         }
 374
 375
 376         /**
 377          * Called when an error in playback occurs.
 378          *
 379          * @param   mp      {@link MediaPlayer} instance performing the playback.
 380          * @param   what    Type of error
 381          * @param   extra   Extra code specific to the error
 382          */
 383         @Override
 384         public boolean onError(MediaPlayer mp, int what, int extra) {
 385             Log.e(TAG, "Error in video playback, what = " + what + ", extra = " + extra);
 386
 387             if (mVideoPreview.getWindowToken() != null) {
 388                 String message = MediaService.getMessageForMediaError(getActivity(), what, extra);
 389                 new AlertDialog.Builder(getActivity())
 390                         .setMessage(message)
 391                         .setPositiveButton(android.R.string.VideoView_error_button,
 392                                 new DialogInterface.OnClickListener() {
 393                                     public void onClick(DialogInterface dialog, int whichButton) {
 394                                         dialog.dismiss();
 395                                         VideoHelper.this.onCompletion(null);
 396                                     }
 397                                 })
 398                         .setCancelable(false)
 399                         .show();
 400             }
 401             return true;
 402         }
 403
 404     }
 405
 406
 407     @Override
 408     public void onStop() {
 409         super.onStop();
 410         if (mMediaServiceConnection != null) {
 411             Log.d(TAG, "Unbinding from MediaService ...");
 412             if (mMediaServiceBinder != null && mMediaController != null) {
 413                 mMediaServiceBinder.unregisterMediaController(mMediaController);
 414             }
 415             getActivity().unbindService(mMediaServiceConnection);
 416             mMediaServiceConnection = null;
 417             mMediaServiceBinder = null;
 418         }
 419     }
 420
 421     @Override
 422     public void onDestroy() {
 423         super.onDestroy();
 424     }
 425
 426
 427     @Override
 428     public boolean onTouch(View v, MotionEvent event) {
 429         if (event.getAction() == MotionEvent.ACTION_DOWN && v == mVideoPreview) {
 430             startFullScreenVideo();
 431             return true;
 432         }
 433         return false;
 434     }
 435
 436
 437     private void startFullScreenVideo() {
 438         Intent i = new Intent(getActivity(), PreviewVideoActivity.class);
 439         i.putExtra(PreviewVideoActivity.EXTRA_ACCOUNT, mAccount);
 440         i.putExtra(PreviewVideoActivity.EXTRA_FILE, mFile);
 441         i.putExtra(PreviewVideoActivity.EXTRA_AUTOPLAY, mVideoPreview.isPlaying());
 442         mVideoPreview.pause();
 443         i.putExtra(PreviewVideoActivity.EXTRA_START_POSITION, mVideoPreview.getCurrentPosition());
 444         startActivityForResult(i, 0);
 445     }
 446
 447
 448     @Override
 449     public void onActivityResult (int requestCode, int resultCode, Intent data) {
 450         super.onActivityResult(requestCode, resultCode, data);
 451         if (resultCode == Activity.RESULT_OK) {
 452             mSavedPlaybackPosition = data.getExtras().getInt(PreviewVideoActivity.EXTRA_START_POSITION);
 453             mAutoplay = data.getExtras().getBoolean(PreviewVideoActivity.EXTRA_AUTOPLAY);
 454         }
 455     }
 456
 457
 458     private void playAudio() {
 459         if (!mMediaServiceBinder.isPlaying(mFile)) {
 460             Log.d(TAG, "starting playback of " + mFile.getStoragePath());
 461             mMediaServiceBinder.start(mAccount, mFile);
 462
 463         } else {
 464             if (!mMediaServiceBinder.isPlaying()) {
 465                 mMediaServiceBinder.start();
 466                 mMediaController.updatePausePlay();
 467             }
 468         }
 469     }
 470
 471
 472     private void bindMediaService() {
 473         Log.d(TAG, "Binding to MediaService...");
 474         if (mMediaServiceConnection == null) {
 475             mMediaServiceConnection = new MediaServiceConnection();
 476         }
 477         getActivity().bindService(  new Intent(getActivity(),
 478                                     MediaService.class),
 479                                     mMediaServiceConnection,
 480                                     Context.BIND_AUTO_CREATE);
 481             // follow the flow in MediaServiceConnection#onServiceConnected(...)
 482     }
 483
 484     /** Defines callbacks for service binding, passed to bindService() */
 485     private class MediaServiceConnection implements ServiceConnection {
 486
 487         @Override
 488         public void onServiceConnected(ComponentName component, IBinder service) {
 489             if (component.equals(new ComponentName(getActivity(), MediaService.class))) {
 490                 Log.d(TAG, "Media service connected");
 491                 mMediaServiceBinder = (MediaServiceBinder) service;
 492                 if (mMediaServiceBinder != null) {
 493                     prepareMediaController();
 494                     playAudio();    // do not wait for the touch of nobody to play audio
 495
 496                     Log.d(TAG, "Successfully bound to MediaService, MediaController ready");
 497
 498                 } else {
 499                     Log.e(TAG, "Unexpected response from MediaService while binding");
 500                 }
 501             }
 502         }
 503
 504         private void prepareMediaController() {
 505             mMediaServiceBinder.registerMediaController(mMediaController);
 506             if (mMediaController != null) {
 507                 mMediaController.setMediaPlayer(mMediaServiceBinder);
 508                 mMediaController.setEnabled(true);
 509                 mMediaController.updatePausePlay();
 510             }
 511         }
 512
 513         @Override
 514         public void onServiceDisconnected(ComponentName component) {
 515             if (component.equals(new ComponentName(getActivity(), MediaService.class))) {
 516                 Log.e(TAG, "Media service suddenly disconnected");
 517                 if (mMediaController != null) {
 518                     mMediaController.setMediaPlayer(null);
 519                 } else {
 520                     Toast.makeText(getActivity(), "No media controller to release when disconnected from media service", Toast.LENGTH_SHORT).show();
 521                 }
 522                 mMediaServiceBinder = null;
 523                 mMediaServiceConnection = null;
 524             }
 525         }
 526     }
 527
 528
 529
 530     /**
 531      * Opens the previewed file with an external application.
 532      *
 533      * TODO - improve this; instead of prioritize the actions available for the MIME type in the server,
 534      * we should get a list of available apps for MIME tpye in the server and join it with the list of
 535      * available apps for the MIME type known from the file extension, to let the user choose
 536      */
 537     private void openFile() {
 538         stopPreview(true);
 539         String storagePath = mFile.getStoragePath();
 540         String encodedStoragePath = WebdavUtils.encodePath(storagePath);
 541         try {
 542             Intent i = new Intent(Intent.ACTION_VIEW);
 543             i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), mFile.getMimetype());
 544             i.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 545             startActivity(i);
 546
 547         } catch (Throwable t) {
 548             Log.e(TAG, "Fail when trying to open with the mimeType provided from the ownCloud server: " + mFile.getMimetype());
 549             boolean toastIt = true;
 550             String mimeType = "";
 551             try {
 552                 Intent i = new Intent(Intent.ACTION_VIEW);
 553                 mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(storagePath.substring(storagePath.lastIndexOf('.') + 1));
 554                 if (mimeType == null || !mimeType.equals(mFile.getMimetype())) {
 555                     if (mimeType != null) {
 556                         i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), mimeType);
 557                     } else {
 558                         // desperate try
 559                         i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), "*-/*");
 560                     }
 561                     i.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 562                     startActivity(i);
 563                     toastIt = false;
 564                 }
 565
 566             } catch (IndexOutOfBoundsException e) {
 567                 Log.e(TAG, "Trying to find out MIME type of a file without extension: " + storagePath);
 568
 569             } catch (ActivityNotFoundException e) {
 570                 Log.e(TAG, "No activity found to handle: " + storagePath + " with MIME type " + mimeType + " obtained from extension");
 571
 572             } catch (Throwable th) {
 573                 Log.e(TAG, "Unexpected problem when opening: " + storagePath, th);
 574
 575             } finally {
 576                 if (toastIt) {
 577                     Toast.makeText(getActivity(), "There is no application to handle file " + mFile.getFileName(), Toast.LENGTH_SHORT).show();
 578                 }
 579             }
 580
 581         }
 582         finish();
 583     }
 584
 585     /**
 586      * Starts a the removal of the previewed file.
 587      *
 588      * Shows a confirmation dialog. The action continues in {@link #onConfirmation(String)} , {@link #onNeutral(String)} or {@link #onCancel(String)},
 589      * depending upon the user selection in the dialog.
 590      */
 591     private void removeFile() {
 592         ConfirmationDialogFragment confDialog = ConfirmationDialogFragment.newInstance(
 593                 R.string.confirmation_remove_alert,
 594                 new String[]{mFile.getFileName()},
 595                 R.string.confirmation_remove_remote_and_local,
 596                 R.string.confirmation_remove_local,
 597                 R.string.common_cancel);
 598         confDialog.setOnConfirmationListener(this);
 599         confDialog.show(getFragmentManager(), ConfirmationDialogFragment.FTAG_CONFIRMATION);
 600     }
 601
 602
 603     /**
 604      * Performs the removal of the previewed file, both locally and in the server.
 605      */
 606     @Override
 607     public void onConfirmation(String callerTag) {
 608         if (mStorageManager.getFileById(mFile.getFileId()) != null) {   // check that the file is still there;
 609             stopPreview(true);
 610             mLastRemoteOperation = new RemoveFileOperation( mFile,      // TODO we need to review the interface with RemoteOperations, and use OCFile IDs instead of OCFile objects as parameters
 611                                                             true,
 612                                                             mStorageManager);
 613             WebdavClient wc = OwnCloudClientUtils.createOwnCloudClient(mAccount, getSherlockActivity().getApplicationContext());
 614             mLastRemoteOperation.execute(wc, this, mHandler);
 615
 616             boolean inDisplayActivity = getActivity() instanceof FileDisplayActivity;
 617             getActivity().showDialog((inDisplayActivity)? FileDisplayActivity.DIALOG_SHORT_WAIT : FileDetailActivity.DIALOG_SHORT_WAIT);
 618         }
 619     }
 620
 621
 622     /**
 623      * Removes the file from local storage
 624      */
 625     @Override
 626     public void onNeutral(String callerTag) {
 627         // TODO this code should be made in a secondary thread,
 628         if (mFile.isDown()) {   // checks it is still there
 629             stopPreview(true);
 630             File f = new File(mFile.getStoragePath());
 631             f.delete();
 632             mFile.setStoragePath(null);
 633             mStorageManager.saveFile(mFile);
 634             finish();
 635         }
 636     }
 637
 638     /**
 639      * User cancelled the removal action.
 640      */
 641     @Override
 642     public void onCancel(String callerTag) {
 643         // nothing to do here
 644     }
 645
 646
 647     /**
 648      * {@inheritDoc}
 649      */
 650     public OCFile getFile(){
 651         return mFile;
 652     }
 653
 654     /*
 655     /**
 656      * Use this method to signal this Activity that it shall update its view.
 657      *
 658      * @param file : An {@link OCFile}
 659      *-/
 660     public void updateFileDetails(OCFile file, Account ocAccount) {
 661         mFile = file;
 662         if (ocAccount != null && (
 663                 mStorageManager == null ||
 664                 (mAccount != null && !mAccount.equals(ocAccount))
 665            )) {
 666             mStorageManager = new FileDataStorageManager(ocAccount, getActivity().getApplicationContext().getContentResolver());
 667         }
 668         mAccount = ocAccount;
 669         updateFileDetails(false);
 670     }
 671     */
 672
 673
 674     /**
 675      * Helper method to test if an {@link OCFile} can be passed to a {@link PreviewMediaFragment} to be previewed.
 676      *
 677      * @param file      File to test if can be previewed.
 678      * @return          'True' if the file can be handled by the fragment.
 679      */
 680     public static boolean canBePreviewed(OCFile file) {
 681         return (file != null && (file.isAudio() || file.isVideo()));
 682     }
 683
 684     /**
 685      * {@inheritDoc}
 686      */
 687     @Override
 688     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 689         if (operation.equals(mLastRemoteOperation)) {
 690             if (operation instanceof RemoveFileOperation) {
 691                 onRemoveFileOperationFinish((RemoveFileOperation)operation, result);
 692             }
 693         }
 694     }
 695
 696     private void onRemoveFileOperationFinish(RemoveFileOperation operation, RemoteOperationResult result) {
 697         boolean inDisplayActivity = getActivity() instanceof FileDisplayActivity;
 698         getActivity().dismissDialog((inDisplayActivity)? FileDisplayActivity.DIALOG_SHORT_WAIT : FileDetailActivity.DIALOG_SHORT_WAIT);
 699
 700         if (result.isSuccess()) {
 701             Toast msg = Toast.makeText(getActivity().getApplicationContext(), R.string.remove_success_msg, Toast.LENGTH_LONG);
 702             msg.show();
 703             finish();
 704
 705         } else {
 706             Toast msg = Toast.makeText(getActivity(), R.string.remove_fail_msg, Toast.LENGTH_LONG);
 707             msg.show();
 708             if (result.isSslRecoverableException()) {
 709                 // TODO show the SSL warning dialog
 710             }
 711         }
 712     }
 713
 714     private void stopPreview(boolean stopAudio) {
 715         if (mFile.isAudio() && stopAudio) {
 716             mMediaServiceBinder.pause();
 717
 718         } else if (mFile.isVideo()) {
 719             mVideoPreview.stopPlayback();
 720         }
 721     }
 722
 723
 724
 725     /**
 726      * Finishes the preview
 727      */
 728     private void finish() {
 729         Activity container = getActivity();
 730         if (container instanceof FileDisplayActivity) {
 731             // double pane
 732             FragmentTransaction transaction = getActivity().getSupportFragmentManager().beginTransaction();
 733             transaction.replace(R.id.file_details_container, new FileDetailFragment(null, null), FileDetailFragment.FTAG); // empty FileDetailFragment
 734             transaction.commit();
 735             ((FileFragment.ContainerActivity)container).onFileStateChanged();
 736         } else {
 737             container.finish();
 738         }
 739     }
 740
 741 }