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 version 2,
   6  *   as published by the Free Software Foundation.
   7  *
   8  *   This program is distributed in the hope that it will be useful,
   9  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  *   GNU General Public License for more details.
  12  *
  13  *   You should have received a copy of the GNU General Public License
  14  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  *
  16  */
  17 package com.owncloud.android.ui.preview;
  18
  19 import java.util.ArrayList;
  20 import java.util.List;
  21
  22 import android.accounts.Account;
  23 import android.app.Activity;
  24 import android.app.AlertDialog;
  25 import android.content.ActivityNotFoundException;
  26 import android.content.ComponentName;
  27 import android.content.Context;
  28 import android.content.DialogInterface;
  29 import android.content.Intent;
  30 import android.content.ServiceConnection;
  31 import android.content.res.Configuration;
  32 import android.media.MediaPlayer;
  33 import android.media.MediaPlayer.OnCompletionListener;
  34 import android.media.MediaPlayer.OnErrorListener;
  35 import android.media.MediaPlayer.OnPreparedListener;
  36 import android.net.Uri;
  37 import android.os.Build;
  38 import android.os.Bundle;
  39 import android.os.Handler;
  40 import android.os.IBinder;
  41 import android.view.LayoutInflater;
  42 import android.view.MotionEvent;
  43 import android.view.View;
  44 import android.view.View.OnTouchListener;
  45 import android.view.ViewGroup;
  46 import android.webkit.MimeTypeMap;
  47 import android.widget.ImageView;
  48 import android.widget.Toast;
  49 import android.widget.VideoView;
  50
  51 import com.actionbarsherlock.view.Menu;
  52 import com.actionbarsherlock.view.MenuInflater;
  53 import com.actionbarsherlock.view.MenuItem;
  54 import com.owncloud.android.R;
  55 import com.owncloud.android.datamodel.FileDataStorageManager;
  56 import com.owncloud.android.datamodel.OCFile;
  57 import com.owncloud.android.media.MediaControlView;
  58 import com.owncloud.android.media.MediaService;
  59 import com.owncloud.android.media.MediaServiceBinder;
  60 import com.owncloud.android.oc_framework.network.webdav.WebdavUtils;
  61 import com.owncloud.android.oc_framework.operations.OnRemoteOperationListener;
  62 import com.owncloud.android.oc_framework.operations.RemoteOperation;
  63 import com.owncloud.android.oc_framework.operations.RemoteOperationResult;
  64 import com.owncloud.android.operations.RemoveFileOperation;
  65 import com.owncloud.android.ui.activity.FileActivity;
  66 import com.owncloud.android.ui.activity.FileDisplayActivity;
  67 import com.owncloud.android.ui.fragment.ConfirmationDialogFragment;
  68 import com.owncloud.android.ui.fragment.FileFragment;
  69 import com.owncloud.android.utils.Log_OC;
  70
  71
  72 /**
  73  * This fragment shows a preview of a downloaded media file (audio or video).
  74  *
  75  * Trying to get an instance with NULL {@link OCFile} or ownCloud {@link Account} values will produce an {@link IllegalStateException}.
  76  *
  77  * By now, if the {@link OCFile} passed is not downloaded, an {@link IllegalStateException} is generated on instantiation too.
  78  *
  79  * @author David A. Velasco
  80  */
  81 public class PreviewMediaFragment extends FileFragment implements
  82         OnTouchListener,
  83         ConfirmationDialogFragment.ConfirmationDialogFragmentListener, OnRemoteOperationListener  {
  84
  85     public static final String EXTRA_FILE = "FILE";
  86     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  87     private static final String EXTRA_PLAY_POSITION = "PLAY_POSITION";
  88     private static final String EXTRA_PLAYING = "PLAYING";
  89
  90     private View mView;
  91     private Account mAccount;
  92     private FileDataStorageManager mStorageManager;
  93     private ImageView mImagePreview;
  94     private VideoView mVideoPreview;
  95     private int mSavedPlaybackPosition;
  96
  97     private Handler mHandler;
  98     private RemoteOperation mLastRemoteOperation;
  99
 100     private MediaServiceBinder mMediaServiceBinder = null;
 101     private MediaControlView mMediaController = null;
 102     private MediaServiceConnection mMediaServiceConnection = null;
 103     private VideoHelper mVideoHelper;
 104     private boolean mAutoplay;
 105     public boolean mPrepared;
 106
 107     private static final String TAG = PreviewMediaFragment.class.getSimpleName();
 108
 109
 110     /**
 111      * Creates a fragment to preview a file.
 112      *
 113      * When 'fileToDetail' or 'ocAccount' are null
 114      *
 115      * @param fileToDetail      An {@link OCFile} to preview in the fragment
 116      * @param ocAccount         An ownCloud account; needed to start downloads
 117      */
 118     public PreviewMediaFragment(OCFile fileToDetail, Account ocAccount, int startPlaybackPosition, boolean autoplay) {
 119         super(fileToDetail);
 120         mAccount = ocAccount;
 121         mSavedPlaybackPosition = startPlaybackPosition;
 122         mStorageManager = null; // we need a context to init this; the container activity is not available yet at this moment
 123         mAutoplay = autoplay;
 124     }
 125
 126
 127     /**
 128      *  Creates an empty fragment for previews.
 129      *
 130      *  MUST BE KEPT: the system uses it when tries to reinstantiate a fragment automatically (for instance, when the device is turned a aside).
 131      *
 132      *  DO NOT CALL IT: an {@link OCFile} and {@link Account} must be provided for a successful construction
 133      */
 134     public PreviewMediaFragment() {
 135         super();
 136         mAccount = null;
 137         mSavedPlaybackPosition = 0;
 138         mStorageManager = null;
 139         mAutoplay = true;
 140     }
 141
 142
 143     /**
 144      * {@inheritDoc}
 145      */
 146     @Override
 147     public void onCreate(Bundle savedInstanceState) {
 148         super.onCreate(savedInstanceState);
 149         mHandler = new Handler();
 150         setHasOptionsMenu(true);
 151     }
 152
 153
 154     /**
 155      * {@inheritDoc}
 156      */
 157     @Override
 158     public View onCreateView(LayoutInflater inflater, ViewGroup container,
 159             Bundle savedInstanceState) {
 160         super.onCreateView(inflater, container, savedInstanceState);
 161         Log_OC.e(TAG, "onCreateView");
 162
 163
 164         mView = inflater.inflate(R.layout.file_preview, container, false);
 165
 166         mImagePreview = (ImageView)mView.findViewById(R.id.image_preview);
 167         mVideoPreview = (VideoView)mView.findViewById(R.id.video_preview);
 168         mVideoPreview.setOnTouchListener(this);
 169
 170         mMediaController = (MediaControlView)mView.findViewById(R.id.media_controller);
 171
 172         return mView;
 173     }
 174
 175
 176     /**
 177      * {@inheritDoc}
 178      */
 179     @Override
 180     public void onAttach(Activity activity) {
 181         super.onAttach(activity);
 182         Log_OC.e(TAG, "onAttach");
 183
 184         if (!(activity instanceof FileFragment.ContainerActivity))
 185             throw new ClassCastException(activity.toString() + " must implement " + FileFragment.ContainerActivity.class.getSimpleName());
 186     }
 187
 188
 189     /**
 190      * {@inheritDoc}
 191      */
 192     @Override
 193     public void onActivityCreated(Bundle savedInstanceState) {
 194         super.onActivityCreated(savedInstanceState);
 195         Log_OC.e(TAG, "onActivityCreated");
 196
 197         mStorageManager = new FileDataStorageManager(mAccount, getActivity().getApplicationContext().getContentResolver());
 198         if (savedInstanceState != null) {
 199             setFile((OCFile)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         OCFile file = getFile();
 206         if (file == null) {
 207             throw new IllegalStateException("Instanced with a NULL OCFile");
 208         }
 209         if (mAccount == null) {
 210             throw new IllegalStateException("Instanced with a NULL ownCloud Account");
 211         }
 212         if (!file.isDown()) {
 213             throw new IllegalStateException("There is no local file to preview");
 214         }
 215         if (file.isVideo()) {
 216             mVideoPreview.setVisibility(View.VISIBLE);
 217             mImagePreview.setVisibility(View.GONE);
 218             prepareVideo();
 219
 220         } else {
 221             mVideoPreview.setVisibility(View.GONE);
 222             mImagePreview.setVisibility(View.VISIBLE);
 223         }
 224
 225     }
 226
 227
 228     /**
 229      * {@inheritDoc}
 230      */
 231     @Override
 232     public void onSaveInstanceState(Bundle outState) {
 233         super.onSaveInstanceState(outState);
 234         Log_OC.e(TAG, "onSaveInstanceState");
 235
 236         outState.putParcelable(PreviewMediaFragment.EXTRA_FILE, getFile());
 237         outState.putParcelable(PreviewMediaFragment.EXTRA_ACCOUNT, mAccount);
 238
 239         if (getFile().isVideo()) {
 240             mSavedPlaybackPosition = mVideoPreview.getCurrentPosition();
 241             mAutoplay = mVideoPreview.isPlaying();
 242             outState.putInt(PreviewMediaFragment.EXTRA_PLAY_POSITION , mSavedPlaybackPosition);
 243             outState.putBoolean(PreviewMediaFragment.EXTRA_PLAYING , mAutoplay);
 244         } else {
 245             outState.putInt(PreviewMediaFragment.EXTRA_PLAY_POSITION , mMediaServiceBinder.getCurrentPosition());
 246             outState.putBoolean(PreviewMediaFragment.EXTRA_PLAYING , mMediaServiceBinder.isPlaying());
 247         }
 248     }
 249
 250
 251     @Override
 252     public void onStart() {
 253         super.onStart();
 254         Log_OC.e(TAG, "onStart");
 255
 256         OCFile file = getFile();
 257         if (file != null) {
 258            if (file.isAudio()) {
 259                bindMediaService();
 260
 261            } else if (file.isVideo()) {
 262                stopAudio();
 263                playVideo();
 264            }
 265         }
 266     }
 267
 268
 269     private void stopAudio() {
 270         Intent i = new Intent(getSherlockActivity(), MediaService.class);
 271         i.setAction(MediaService.ACTION_STOP_ALL);
 272         getSherlockActivity().startService(i);
 273     }
 274
 275
 276     /**
 277      * {@inheritDoc}
 278      */
 279     @Override
 280     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
 281         super.onCreateOptionsMenu(menu, inflater);
 282
 283         inflater.inflate(R.menu.file_actions_menu, menu);
 284         List<Integer> toHide = new ArrayList<Integer>();
 285
 286         MenuItem item = null;
 287         toHide.add(R.id.action_cancel_download);
 288         toHide.add(R.id.action_cancel_upload);
 289         toHide.add(R.id.action_download_file);
 290         toHide.add(R.id.action_sync_file);
 291         toHide.add(R.id.action_rename_file);    // by now
 292
 293         for (int i : toHide) {
 294             item = menu.findItem(i);
 295             if (item != null) {
 296                 item.setVisible(false);
 297                 item.setEnabled(false);
 298             }
 299         }
 300
 301     }
 302
 303
 304     /**
 305      * {@inheritDoc}
 306      */
 307     @Override
 308     public boolean onOptionsItemSelected(MenuItem item) {
 309         switch (item.getItemId()) {
 310             case R.id.action_open_file_with: {
 311                 openFile();
 312                 return true;
 313             }
 314             case R.id.action_remove_file: {
 315                 removeFile();
 316                 return true;
 317             }
 318             case R.id.action_see_details: {
 319                 seeDetails();
 320                 return true;
 321             }
 322
 323             default:
 324                 return false;
 325         }
 326     }
 327
 328
 329     private void seeDetails() {
 330         stopPreview(false);
 331         ((FileFragment.ContainerActivity)getActivity()).showDetails(getFile());
 332     }
 333
 334
 335     private void prepareVideo() {
 336         // create helper to get more control on the playback
 337         mVideoHelper = new VideoHelper();
 338         mVideoPreview.setOnPreparedListener(mVideoHelper);
 339         mVideoPreview.setOnCompletionListener(mVideoHelper);
 340         mVideoPreview.setOnErrorListener(mVideoHelper);
 341     }
 342
 343     private void playVideo() {
 344         // create and prepare control panel for the user
 345         mMediaController.setMediaPlayer(mVideoPreview);
 346
 347         // load the video file in the video player ; when done, VideoHelper#onPrepared() will be called
 348         mVideoPreview.setVideoPath(getFile().getStoragePath());
 349     }
 350
 351
 352     private class VideoHelper implements OnCompletionListener, OnPreparedListener, OnErrorListener {
 353
 354         /**
 355          * Called when the file is ready to be played.
 356          *
 357          * Just starts the playback.
 358          *
 359          * @param   mp    {@link MediaPlayer} instance performing the playback.
 360          */
 361         @Override
 362         public void onPrepared(MediaPlayer vp) {
 363             Log_OC.e(TAG, "onPrepared");
 364             mVideoPreview.seekTo(mSavedPlaybackPosition);
 365             if (mAutoplay) {
 366                 mVideoPreview.start();
 367             }
 368             mMediaController.setEnabled(true);
 369             mMediaController.updatePausePlay();
 370             mPrepared = true;
 371         }
 372
 373
 374         /**
 375          * Called when the file is finished playing.
 376          *
 377          * Finishes the activity.
 378          *
 379          * @param   mp    {@link MediaPlayer} instance performing the playback.
 380          */
 381         @Override
 382         public void onCompletion(MediaPlayer  mp) {
 383             Log_OC.e(TAG, "completed");
 384             if (mp != null) {
 385                 mVideoPreview.seekTo(0);
 386                 // next lines are necessary to work around undesired video loops
 387                 if (Build.VERSION.SDK_INT == Build.VERSION_CODES.GINGERBREAD) {
 388                     mVideoPreview.pause();
 389
 390                 } else if (Build.VERSION.SDK_INT == Build.VERSION_CODES.GINGERBREAD_MR1) {
 391                     // mVideePreview.pause() is not enough
 392
 393                     mMediaController.setEnabled(false);
 394                     mVideoPreview.stopPlayback();
 395                     mAutoplay = false;
 396                     mSavedPlaybackPosition = 0;
 397                     mVideoPreview.setVideoPath(getFile().getStoragePath());
 398                 }
 399             } // else : called from onError()
 400             mMediaController.updatePausePlay();
 401         }
 402
 403
 404         /**
 405          * Called when an error in playback occurs.
 406          *
 407          * @param   mp      {@link MediaPlayer} instance performing the playback.
 408          * @param   what    Type of error
 409          * @param   extra   Extra code specific to the error
 410          */
 411         @Override
 412         public boolean onError(MediaPlayer mp, int what, int extra) {
 413             if (mVideoPreview.getWindowToken() != null) {
 414                 String message = MediaService.getMessageForMediaError(getActivity(), what, extra);
 415                 new AlertDialog.Builder(getActivity())
 416                         .setMessage(message)
 417                         .setPositiveButton(android.R.string.VideoView_error_button,
 418                                 new DialogInterface.OnClickListener() {
 419                                     public void onClick(DialogInterface dialog, int whichButton) {
 420                                         dialog.dismiss();
 421                                         VideoHelper.this.onCompletion(null);
 422                                     }
 423                                 })
 424                         .setCancelable(false)
 425                         .show();
 426             }
 427             return true;
 428         }
 429
 430     }
 431
 432
 433     @Override
 434     public void onPause() {
 435         super.onPause();
 436         Log_OC.e(TAG, "onPause");
 437     }
 438
 439     @Override
 440     public void onResume() {
 441         super.onResume();
 442         Log_OC.e(TAG, "onResume");
 443     }
 444
 445     @Override
 446     public void onDestroy() {
 447         super.onDestroy();
 448         Log_OC.e(TAG, "onDestroy");
 449     }
 450
 451     @Override
 452     public void onStop() {
 453         Log_OC.e(TAG, "onStop");
 454         super.onStop();
 455
 456         mPrepared = false;
 457         if (mMediaServiceConnection != null) {
 458             Log_OC.d(TAG, "Unbinding from MediaService ...");
 459             if (mMediaServiceBinder != null && mMediaController != null) {
 460                 mMediaServiceBinder.unregisterMediaController(mMediaController);
 461             }
 462             getActivity().unbindService(mMediaServiceConnection);
 463             mMediaServiceConnection = null;
 464             mMediaServiceBinder = null;
 465         }
 466     }
 467
 468     @Override
 469     public boolean onTouch(View v, MotionEvent event) {
 470         if (event.getAction() == MotionEvent.ACTION_DOWN && v == mVideoPreview) {
 471             startFullScreenVideo();
 472             return true;
 473         }
 474         return false;
 475     }
 476
 477
 478     private void startFullScreenVideo() {
 479         Intent i = new Intent(getActivity(), PreviewVideoActivity.class);
 480         i.putExtra(FileActivity.EXTRA_ACCOUNT, mAccount);
 481         i.putExtra(FileActivity.EXTRA_FILE, getFile());
 482         i.putExtra(PreviewVideoActivity.EXTRA_AUTOPLAY, mVideoPreview.isPlaying());
 483         mVideoPreview.pause();
 484         i.putExtra(PreviewVideoActivity.EXTRA_START_POSITION, mVideoPreview.getCurrentPosition());
 485         startActivityForResult(i, 0);
 486     }
 487
 488     @Override
 489     public void onConfigurationChanged (Configuration newConfig) {
 490         Log_OC.e(TAG, "onConfigurationChanged " + this);
 491     }
 492
 493     @Override
 494     public void onActivityResult (int requestCode, int resultCode, Intent data) {
 495         Log_OC.e(TAG, "onActivityResult " + this);
 496         super.onActivityResult(requestCode, resultCode, data);
 497         if (resultCode == Activity.RESULT_OK) {
 498             mSavedPlaybackPosition = data.getExtras().getInt(PreviewVideoActivity.EXTRA_START_POSITION);
 499             mAutoplay = data.getExtras().getBoolean(PreviewVideoActivity.EXTRA_AUTOPLAY);
 500         }
 501     }
 502
 503
 504     private void playAudio() {
 505         OCFile file = getFile();
 506         if (!mMediaServiceBinder.isPlaying(file)) {
 507             Log_OC.d(TAG, "starting playback of " + file.getStoragePath());
 508             mMediaServiceBinder.start(mAccount, file, mAutoplay, mSavedPlaybackPosition);
 509
 510         } else {
 511             if (!mMediaServiceBinder.isPlaying() && mAutoplay) {
 512                 mMediaServiceBinder.start();
 513                 mMediaController.updatePausePlay();
 514             }
 515         }
 516     }
 517
 518
 519     private void bindMediaService() {
 520         Log_OC.d(TAG, "Binding to MediaService...");
 521         if (mMediaServiceConnection == null) {
 522             mMediaServiceConnection = new MediaServiceConnection();
 523         }
 524         getActivity().bindService(  new Intent(getActivity(),
 525                                     MediaService.class),
 526                                     mMediaServiceConnection,
 527                                     Context.BIND_AUTO_CREATE);
 528             // follow the flow in MediaServiceConnection#onServiceConnected(...)
 529     }
 530
 531     /** Defines callbacks for service binding, passed to bindService() */
 532     private class MediaServiceConnection implements ServiceConnection {
 533
 534         @Override
 535         public void onServiceConnected(ComponentName component, IBinder service) {
 536             if (component.equals(new ComponentName(getActivity(), MediaService.class))) {
 537                 Log_OC.d(TAG, "Media service connected");
 538                 mMediaServiceBinder = (MediaServiceBinder) service;
 539                 if (mMediaServiceBinder != null) {
 540                     prepareMediaController();
 541                     playAudio();    // do not wait for the touch of nobody to play audio
 542
 543                     Log_OC.d(TAG, "Successfully bound to MediaService, MediaController ready");
 544
 545                 } else {
 546                     Log_OC.e(TAG, "Unexpected response from MediaService while binding");
 547                 }
 548             }
 549         }
 550
 551         private void prepareMediaController() {
 552             mMediaServiceBinder.registerMediaController(mMediaController);
 553             if (mMediaController != null) {
 554                 mMediaController.setMediaPlayer(mMediaServiceBinder);
 555                 mMediaController.setEnabled(true);
 556                 mMediaController.updatePausePlay();
 557             }
 558         }
 559
 560         @Override
 561         public void onServiceDisconnected(ComponentName component) {
 562             if (component.equals(new ComponentName(getActivity(), MediaService.class))) {
 563                 Log_OC.e(TAG, "Media service suddenly disconnected");
 564                 if (mMediaController != null) {
 565                     mMediaController.setMediaPlayer(null);
 566                 } else {
 567                     Toast.makeText(getActivity(), "No media controller to release when disconnected from media service", Toast.LENGTH_SHORT).show();
 568                 }
 569                 mMediaServiceBinder = null;
 570                 mMediaServiceConnection = null;
 571             }
 572         }
 573     }
 574
 575
 576
 577     /**
 578      * Opens the previewed file with an external application.
 579      *
 580      * TODO - improve this; instead of prioritize the actions available for the MIME type in the server,
 581      * we should get a list of available apps for MIME tpye in the server and join it with the list of
 582      * available apps for the MIME type known from the file extension, to let the user choose
 583      */
 584     private void openFile() {
 585         OCFile file = getFile();
 586         stopPreview(true);
 587         String storagePath = file.getStoragePath();
 588         String encodedStoragePath = WebdavUtils.encodePath(storagePath);
 589         try {
 590             Intent i = new Intent(Intent.ACTION_VIEW);
 591             i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), file.getMimetype());
 592             i.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 593             startActivity(i);
 594
 595         } catch (Throwable t) {
 596             Log_OC.e(TAG, "Fail when trying to open with the mimeType provided from the ownCloud server: " + file.getMimetype());
 597             boolean toastIt = true;
 598             String mimeType = "";
 599             try {
 600                 Intent i = new Intent(Intent.ACTION_VIEW);
 601                 mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(storagePath.substring(storagePath.lastIndexOf('.') + 1));
 602                 if (mimeType == null || !mimeType.equals(file.getMimetype())) {
 603                     if (mimeType != null) {
 604                         i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), mimeType);
 605                     } else {
 606                         // desperate try
 607                         i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), "*-/*");
 608                     }
 609                     i.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 610                     startActivity(i);
 611                     toastIt = false;
 612                 }
 613
 614             } catch (IndexOutOfBoundsException e) {
 615                 Log_OC.e(TAG, "Trying to find out MIME type of a file without extension: " + storagePath);
 616
 617             } catch (ActivityNotFoundException e) {
 618                 Log_OC.e(TAG, "No activity found to handle: " + storagePath + " with MIME type " + mimeType + " obtained from extension");
 619
 620             } catch (Throwable th) {
 621                 Log_OC.e(TAG, "Unexpected problem when opening: " + storagePath, th);
 622
 623             } finally {
 624                 if (toastIt) {
 625                     Toast.makeText(getActivity(), "There is no application to handle file " + file.getFileName(), Toast.LENGTH_SHORT).show();
 626                 }
 627             }
 628
 629         }
 630         finish();
 631     }
 632
 633     /**
 634      * Starts a the removal of the previewed file.
 635      *
 636      * Shows a confirmation dialog. The action continues in {@link #onConfirmation(String)} , {@link #onNeutral(String)} or {@link #onCancel(String)},
 637      * depending upon the user selection in the dialog.
 638      */
 639     private void removeFile() {
 640         ConfirmationDialogFragment confDialog = ConfirmationDialogFragment.newInstance(
 641                 R.string.confirmation_remove_alert,
 642                 new String[]{getFile().getFileName()},
 643                 R.string.confirmation_remove_remote_and_local,
 644                 R.string.confirmation_remove_local,
 645                 R.string.common_cancel);
 646         confDialog.setOnConfirmationListener(this);
 647         confDialog.show(getFragmentManager(), ConfirmationDialogFragment.FTAG_CONFIRMATION);
 648     }
 649
 650
 651     /**
 652      * Performs the removal of the previewed file, both locally and in the server.
 653      */
 654     @Override
 655     public void onConfirmation(String callerTag) {
 656         OCFile file = getFile();
 657         if (mStorageManager.getFileById(file.getFileId()) != null) {   // check that the file is still there;
 658             stopPreview(true);
 659             mLastRemoteOperation = new RemoveFileOperation( file,      // TODO we need to review the interface with RemoteOperations, and use OCFile IDs instead of OCFile objects as parameters
 660                                                             true,
 661                                                             mStorageManager);
 662             mLastRemoteOperation.execute(mAccount, getSherlockActivity(), this, mHandler, getSherlockActivity());
 663
 664             ((FileDisplayActivity) getActivity()).showLoadingDialog();
 665         }
 666     }
 667
 668
 669     /**
 670      * Removes the file from local storage
 671      */
 672     @Override
 673     public void onNeutral(String callerTag) {
 674         OCFile file = getFile();
 675         stopPreview(true);
 676         mStorageManager.removeFile(file, false, true);    // TODO perform in background task / new thread
 677         finish();
 678     }
 679
 680     /**
 681      * User cancelled the removal action.
 682      */
 683     @Override
 684     public void onCancel(String callerTag) {
 685         // nothing to do here
 686     }
 687
 688
 689     /**
 690      * Helper method to test if an {@link OCFile} can be passed to a {@link PreviewMediaFragment} to be previewed.
 691      *
 692      * @param file      File to test if can be previewed.
 693      * @return          'True' if the file can be handled by the fragment.
 694      */
 695     public static boolean canBePreviewed(OCFile file) {
 696         return (file != null && (file.isAudio() || file.isVideo()));
 697     }
 698
 699     /**
 700      * {@inheritDoc}
 701      */
 702     @Override
 703     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 704         if (operation.equals(mLastRemoteOperation)) {
 705             if (operation instanceof RemoveFileOperation) {
 706                 onRemoveFileOperationFinish((RemoveFileOperation)operation, result);
 707             }
 708         }
 709     }
 710
 711     private void onRemoveFileOperationFinish(RemoveFileOperation operation, RemoteOperationResult result) {
 712         ((FileDisplayActivity) getActivity()).dismissLoadingDialog();
 713         if (result.isSuccess()) {
 714             Toast msg = Toast.makeText(getActivity().getApplicationContext(), R.string.remove_success_msg, Toast.LENGTH_LONG);
 715             msg.show();
 716             finish();
 717
 718         } else {
 719             Toast msg = Toast.makeText(getActivity(), R.string.remove_fail_msg, Toast.LENGTH_LONG);
 720             msg.show();
 721             if (result.isSslRecoverableException()) {
 722                 // TODO show the SSL warning dialog
 723             }
 724         }
 725     }
 726
 727     private void stopPreview(boolean stopAudio) {
 728         OCFile file = getFile();
 729         if (file.isAudio() && stopAudio) {
 730             mMediaServiceBinder.pause();
 731
 732         } else if (file.isVideo()) {
 733             mVideoPreview.stopPlayback();
 734         }
 735     }
 736
 737
 738
 739     /**
 740      * Finishes the preview
 741      */
 742     private void finish() {
 743         getActivity().onBackPressed();
 744     }
 745
 746
 747     public int getPosition() {
 748         if (mPrepared) {
 749             mSavedPlaybackPosition = mVideoPreview.getCurrentPosition();
 750         }
 751         Log_OC.e(TAG, "getting position: " + mSavedPlaybackPosition);
 752         return mSavedPlaybackPosition;
 753     }
 754
 755     public boolean isPlaying() {
 756         if (mPrepared) {
 757             mAutoplay = mVideoPreview.isPlaying();
 758         }
 759         return mAutoplay;
 760     }
 761
 762 }