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.io.File;
  20 import java.util.ArrayList;
  21 import java.util.List;
  22
  23 import android.accounts.Account;
  24 import android.app.Activity;
  25 import android.app.AlertDialog;
  26 import android.content.ActivityNotFoundException;
  27 import android.content.ComponentName;
  28 import android.content.Context;
  29 import android.content.DialogInterface;
  30 import android.content.Intent;
  31 import android.content.ServiceConnection;
  32 import android.content.res.Configuration;
  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.Build;
  39 import android.os.Bundle;
  40 import android.os.Handler;
  41 import android.os.IBinder;
  42 import android.view.LayoutInflater;
  43 import android.view.MotionEvent;
  44 import android.view.View;
  45 import android.view.View.OnTouchListener;
  46 import android.view.ViewGroup;
  47 import android.webkit.MimeTypeMap;
  48 import android.widget.ImageView;
  49 import android.widget.Toast;
  50 import android.widget.VideoView;
  51
  52 import com.actionbarsherlock.view.Menu;
  53 import com.actionbarsherlock.view.MenuInflater;
  54 import com.actionbarsherlock.view.MenuItem;
  55 import com.owncloud.android.Log_OC;
  56 import com.owncloud.android.R;
  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.operations.OnRemoteOperationListener;
  63 import com.owncloud.android.operations.RemoteOperation;
  64 import com.owncloud.android.operations.RemoteOperationResult;
  65 import com.owncloud.android.operations.RemoveFileOperation;
  66 import com.owncloud.android.ui.activity.FileActivity;
  67 import com.owncloud.android.ui.activity.FileDisplayActivity;
  68 import com.owncloud.android.ui.fragment.ConfirmationDialogFragment;
  69 import com.owncloud.android.ui.fragment.FileFragment;
  70
  71 import eu.alefzero.webdav.WebdavUtils;
  72
  73 /**
  74  * This fragment shows a preview of a downloaded media file (audio or video).
  75  *
  76  * Trying to get an instance with NULL {@link OCFile} or ownCloud {@link Account} values will produce an {@link IllegalStateException}.
  77  *
  78  * By now, if the {@link OCFile} passed is not downloaded, an {@link IllegalStateException} is generated on instantiation too.
  79  *
  80  * @author David A. Velasco
  81  */
  82 public class PreviewMediaFragment extends FileFragment implements
  83         OnTouchListener,
  84         ConfirmationDialogFragment.ConfirmationDialogFragmentListener, OnRemoteOperationListener  {
  85
  86     public static final String EXTRA_FILE = "FILE";
  87     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  88     private static final String EXTRA_PLAY_POSITION = "PLAY_POSITION";
  89     private static final String EXTRA_PLAYING = "PLAYING";
  90
  91     private View mView;
  92     private Account mAccount;
  93     private FileDataStorageManager mStorageManager;
  94     private ImageView mImagePreview;
  95     private VideoView mVideoPreview;
  96     private int mSavedPlaybackPosition;
  97
  98     private Handler mHandler;
  99     private RemoteOperation mLastRemoteOperation;
 100
 101     private MediaServiceBinder mMediaServiceBinder = null;
 102     private MediaControlView mMediaController = null;
 103     private MediaServiceConnection mMediaServiceConnection = null;
 104     private VideoHelper mVideoHelper;
 105     private boolean mAutoplay;
 106     public boolean mPrepared;
 107
 108     private static final String TAG = PreviewMediaFragment.class.getSimpleName();
 109
 110
 111     /**
 112      * Creates a fragment to preview a file.
 113      *
 114      * When 'fileToDetail' or 'ocAccount' are null
 115      *
 116      * @param fileToDetail      An {@link OCFile} to preview in the fragment
 117      * @param ocAccount         An ownCloud account; needed to start downloads
 118      */
 119     public PreviewMediaFragment(OCFile fileToDetail, Account ocAccount, int startPlaybackPosition, boolean autoplay) {
 120         super(fileToDetail);
 121         mAccount = ocAccount;
 122         mSavedPlaybackPosition = startPlaybackPosition;
 123         mStorageManager = null; // we need a context to init this; the container activity is not available yet at this moment
 124         mAutoplay = autoplay;
 125     }
 126
 127
 128     /**
 129      *  Creates an empty fragment for previews.
 130      *
 131      *  MUST BE KEPT: the system uses it when tries to reinstantiate a fragment automatically (for instance, when the device is turned a aside).
 132      *
 133      *  DO NOT CALL IT: an {@link OCFile} and {@link Account} must be provided for a successful construction
 134      */
 135     public PreviewMediaFragment() {
 136         super();
 137         mAccount = null;
 138         mSavedPlaybackPosition = 0;
 139         mStorageManager = null;
 140         mAutoplay = true;
 141     }
 142
 143
 144     /**
 145      * {@inheritDoc}
 146      */
 147     @Override
 148     public void onCreate(Bundle savedInstanceState) {
 149         super.onCreate(savedInstanceState);
 150         mHandler = new Handler();
 151         setHasOptionsMenu(true);
 152     }
 153
 154
 155     /**
 156      * {@inheritDoc}
 157      */
 158     @Override
 159     public View onCreateView(LayoutInflater inflater, ViewGroup container,
 160             Bundle savedInstanceState) {
 161         super.onCreateView(inflater, container, savedInstanceState);
 162         Log_OC.e(TAG, "onCreateView");
 163
 164
 165         mView = inflater.inflate(R.layout.file_preview, container, false);
 166
 167         mImagePreview = (ImageView)mView.findViewById(R.id.image_preview);
 168         mVideoPreview = (VideoView)mView.findViewById(R.id.video_preview);
 169         mVideoPreview.setOnTouchListener(this);
 170
 171         mMediaController = (MediaControlView)mView.findViewById(R.id.media_controller);
 172
 173         return mView;
 174     }
 175
 176
 177     /**
 178      * {@inheritDoc}
 179      */
 180     @Override
 181     public void onAttach(Activity activity) {
 182         super.onAttach(activity);
 183         Log_OC.e(TAG, "onAttach");
 184
 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         Log_OC.e(TAG, "onActivityCreated");
 197
 198         mStorageManager = new FileDataStorageManager(mAccount, getActivity().getApplicationContext().getContentResolver());
 199         if (savedInstanceState != null) {
 200             setFile((OCFile)savedInstanceState.getParcelable(PreviewMediaFragment.EXTRA_FILE));
 201             mAccount = savedInstanceState.getParcelable(PreviewMediaFragment.EXTRA_ACCOUNT);
 202             mSavedPlaybackPosition = savedInstanceState.getInt(PreviewMediaFragment.EXTRA_PLAY_POSITION);
 203             mAutoplay = savedInstanceState.getBoolean(PreviewMediaFragment.EXTRA_PLAYING);
 204
 205         }
 206         OCFile file = getFile();
 207         if (file == null) {
 208             throw new IllegalStateException("Instanced with a NULL OCFile");
 209         }
 210         if (mAccount == null) {
 211             throw new IllegalStateException("Instanced with a NULL ownCloud Account");
 212         }
 213         if (!file.isDown()) {
 214             throw new IllegalStateException("There is no local file to preview");
 215         }
 216         if (file.isVideo()) {
 217             mVideoPreview.setVisibility(View.VISIBLE);
 218             mImagePreview.setVisibility(View.GONE);
 219             prepareVideo();
 220
 221         } else {
 222             mVideoPreview.setVisibility(View.GONE);
 223             mImagePreview.setVisibility(View.VISIBLE);
 224         }
 225
 226     }
 227
 228
 229     /**
 230      * {@inheritDoc}
 231      */
 232     @Override
 233     public void onSaveInstanceState(Bundle outState) {
 234         super.onSaveInstanceState(outState);
 235         Log_OC.e(TAG, "onSaveInstanceState");
 236
 237         outState.putParcelable(PreviewMediaFragment.EXTRA_FILE, getFile());
 238         outState.putParcelable(PreviewMediaFragment.EXTRA_ACCOUNT, mAccount);
 239
 240         if (getFile().isVideo()) {
 241             mSavedPlaybackPosition = mVideoPreview.getCurrentPosition();
 242             mAutoplay = mVideoPreview.isPlaying();
 243             outState.putInt(PreviewMediaFragment.EXTRA_PLAY_POSITION , mSavedPlaybackPosition);
 244             outState.putBoolean(PreviewMediaFragment.EXTRA_PLAYING , mAutoplay);
 245         } else {
 246             outState.putInt(PreviewMediaFragment.EXTRA_PLAY_POSITION , mMediaServiceBinder.getCurrentPosition());
 247             outState.putBoolean(PreviewMediaFragment.EXTRA_PLAYING , mMediaServiceBinder.isPlaying());
 248         }
 249     }
 250
 251
 252     @Override
 253     public void onStart() {
 254         super.onStart();
 255         Log_OC.e(TAG, "onStart");
 256
 257         OCFile file = getFile();
 258         if (file != null) {
 259            if (file.isAudio()) {
 260                bindMediaService();
 261
 262            } else if (file.isVideo()) {
 263                stopAudio();
 264                playVideo();
 265            }
 266         }
 267     }
 268
 269
 270     private void stopAudio() {
 271         Intent i = new Intent(getSherlockActivity(), MediaService.class);
 272         i.setAction(MediaService.ACTION_STOP_ALL);
 273         getSherlockActivity().startService(i);
 274     }
 275
 276
 277     /**
 278      * {@inheritDoc}
 279      */
 280     @Override
 281     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
 282         super.onCreateOptionsMenu(menu, inflater);
 283
 284         inflater.inflate(R.menu.file_actions_menu, menu);
 285         List<Integer> toHide = new ArrayList<Integer>();
 286
 287         MenuItem item = null;
 288         toHide.add(R.id.action_cancel_download);
 289         toHide.add(R.id.action_cancel_upload);
 290         toHide.add(R.id.action_download_file);
 291         toHide.add(R.id.action_sync_file);
 292         toHide.add(R.id.action_rename_file);    // by now
 293
 294         for (int i : toHide) {
 295             item = menu.findItem(i);
 296             if (item != null) {
 297                 item.setVisible(false);
 298                 item.setEnabled(false);
 299             }
 300         }
 301
 302     }
 303
 304
 305     /**
 306      * {@inheritDoc}
 307      */
 308     @Override
 309     public boolean onOptionsItemSelected(MenuItem item) {
 310         switch (item.getItemId()) {
 311             case R.id.action_open_file_with: {
 312                 openFile();
 313                 return true;
 314             }
 315             case R.id.action_remove_file: {
 316                 removeFile();
 317                 return true;
 318             }
 319             case R.id.action_see_details: {
 320                 seeDetails();
 321                 return true;
 322             }
 323
 324             default:
 325                 return false;
 326         }
 327     }
 328
 329
 330     private void seeDetails() {
 331         stopPreview(false);
 332         ((FileFragment.ContainerActivity)getActivity()).showDetails(getFile());
 333     }
 334
 335
 336     private void prepareVideo() {
 337         // create helper to get more control on the playback
 338         mVideoHelper = new VideoHelper();
 339         mVideoPreview.setOnPreparedListener(mVideoHelper);
 340         mVideoPreview.setOnCompletionListener(mVideoHelper);
 341         mVideoPreview.setOnErrorListener(mVideoHelper);
 342     }
 343
 344     private void playVideo() {
 345         // create and prepare control panel for the user
 346         mMediaController.setMediaPlayer(mVideoPreview);
 347
 348         // load the video file in the video player ; when done, VideoHelper#onPrepared() will be called
 349         mVideoPreview.setVideoPath(getFile().getStoragePath());
 350     }
 351
 352
 353     private class VideoHelper implements OnCompletionListener, OnPreparedListener, OnErrorListener {
 354
 355         /**
 356          * Called when the file is ready to be played.
 357          *
 358          * Just starts the playback.
 359          *
 360          * @param   mp    {@link MediaPlayer} instance performing the playback.
 361          */
 362         @Override
 363         public void onPrepared(MediaPlayer vp) {
 364             Log_OC.e(TAG, "onPrepared");
 365             mVideoPreview.seekTo(mSavedPlaybackPosition);
 366             if (mAutoplay) {
 367                 mVideoPreview.start();
 368             }
 369             mMediaController.setEnabled(true);
 370             mMediaController.updatePausePlay();
 371             mPrepared = true;
 372         }
 373
 374
 375         /**
 376          * Called when the file is finished playing.
 377          *
 378          * Finishes the activity.
 379          *
 380          * @param   mp    {@link MediaPlayer} instance performing the playback.
 381          */
 382         @Override
 383         public void onCompletion(MediaPlayer  mp) {
 384             Log_OC.e(TAG, "completed");
 385             if (mp != null) {
 386                 mVideoPreview.seekTo(0);
 387                 // next lines are necessary to work around undesired video loops
 388                 if (Build.VERSION.SDK_INT == Build.VERSION_CODES.GINGERBREAD) {
 389                     mVideoPreview.pause();
 390
 391                 } else if (Build.VERSION.SDK_INT == Build.VERSION_CODES.GINGERBREAD_MR1) {
 392                     // mVideePreview.pause() is not enough
 393
 394                     mMediaController.setEnabled(false);
 395                     mVideoPreview.stopPlayback();
 396                     mAutoplay = false;
 397                     mSavedPlaybackPosition = 0;
 398                     mVideoPreview.setVideoPath(getFile().getStoragePath());
 399                 }
 400             } // else : called from onError()
 401             mMediaController.updatePausePlay();
 402         }
 403
 404
 405         /**
 406          * Called when an error in playback occurs.
 407          *
 408          * @param   mp      {@link MediaPlayer} instance performing the playback.
 409          * @param   what    Type of error
 410          * @param   extra   Extra code specific to the error
 411          */
 412         @Override
 413         public boolean onError(MediaPlayer mp, int what, int extra) {
 414             if (mVideoPreview.getWindowToken() != null) {
 415                 String message = MediaService.getMessageForMediaError(getActivity(), what, extra);
 416                 new AlertDialog.Builder(getActivity())
 417                         .setMessage(message)
 418                         .setPositiveButton(android.R.string.VideoView_error_button,
 419                                 new DialogInterface.OnClickListener() {
 420                                     public void onClick(DialogInterface dialog, int whichButton) {
 421                                         dialog.dismiss();
 422                                         VideoHelper.this.onCompletion(null);
 423                                     }
 424                                 })
 425                         .setCancelable(false)
 426                         .show();
 427             }
 428             return true;
 429         }
 430
 431     }
 432
 433
 434     @Override
 435     public void onPause() {
 436         super.onPause();
 437         Log_OC.e(TAG, "onPause");
 438     }
 439
 440     @Override
 441     public void onResume() {
 442         super.onResume();
 443         Log_OC.e(TAG, "onResume");
 444     }
 445
 446     @Override
 447     public void onDestroy() {
 448         super.onDestroy();
 449         Log_OC.e(TAG, "onDestroy");
 450     }
 451
 452     @Override
 453     public void onStop() {
 454         Log_OC.e(TAG, "onStop");
 455         super.onStop();
 456
 457         mPrepared = false;
 458         if (mMediaServiceConnection != null) {
 459             Log_OC.d(TAG, "Unbinding from MediaService ...");
 460             if (mMediaServiceBinder != null && mMediaController != null) {
 461                 mMediaServiceBinder.unregisterMediaController(mMediaController);
 462             }
 463             getActivity().unbindService(mMediaServiceConnection);
 464             mMediaServiceConnection = null;
 465             mMediaServiceBinder = null;
 466         }
 467     }
 468
 469     @Override
 470     public boolean onTouch(View v, MotionEvent event) {
 471         if (event.getAction() == MotionEvent.ACTION_DOWN && v == mVideoPreview) {
 472             startFullScreenVideo();
 473             return true;
 474         }
 475         return false;
 476     }
 477
 478
 479     private void startFullScreenVideo() {
 480         Intent i = new Intent(getActivity(), PreviewVideoActivity.class);
 481         i.putExtra(FileActivity.EXTRA_ACCOUNT, mAccount);
 482         i.putExtra(FileActivity.EXTRA_FILE, getFile());
 483         i.putExtra(PreviewVideoActivity.EXTRA_AUTOPLAY, mVideoPreview.isPlaying());
 484         mVideoPreview.pause();
 485         i.putExtra(PreviewVideoActivity.EXTRA_START_POSITION, mVideoPreview.getCurrentPosition());
 486         startActivityForResult(i, 0);
 487     }
 488
 489     @Override
 490     public void onConfigurationChanged (Configuration newConfig) {
 491         Log_OC.e(TAG, "onConfigurationChanged " + this);
 492     }
 493
 494     @Override
 495     public void onActivityResult (int requestCode, int resultCode, Intent data) {
 496         Log_OC.e(TAG, "onActivityResult " + this);
 497         super.onActivityResult(requestCode, resultCode, data);
 498         if (resultCode == Activity.RESULT_OK) {
 499             mSavedPlaybackPosition = data.getExtras().getInt(PreviewVideoActivity.EXTRA_START_POSITION);
 500             mAutoplay = data.getExtras().getBoolean(PreviewVideoActivity.EXTRA_AUTOPLAY);
 501         }
 502     }
 503
 504
 505     private void playAudio() {
 506         OCFile file = getFile();
 507         if (!mMediaServiceBinder.isPlaying(file)) {
 508             Log_OC.d(TAG, "starting playback of " + file.getStoragePath());
 509             mMediaServiceBinder.start(mAccount, file, mAutoplay, mSavedPlaybackPosition);
 510
 511         } else {
 512             if (!mMediaServiceBinder.isPlaying() && mAutoplay) {
 513                 mMediaServiceBinder.start();
 514                 mMediaController.updatePausePlay();
 515             }
 516         }
 517     }
 518
 519
 520     private void bindMediaService() {
 521         Log_OC.d(TAG, "Binding to MediaService...");
 522         if (mMediaServiceConnection == null) {
 523             mMediaServiceConnection = new MediaServiceConnection();
 524         }
 525         getActivity().bindService(  new Intent(getActivity(),
 526                                     MediaService.class),
 527                                     mMediaServiceConnection,
 528                                     Context.BIND_AUTO_CREATE);
 529             // follow the flow in MediaServiceConnection#onServiceConnected(...)
 530     }
 531
 532     /** Defines callbacks for service binding, passed to bindService() */
 533     private class MediaServiceConnection implements ServiceConnection {
 534
 535         @Override
 536         public void onServiceConnected(ComponentName component, IBinder service) {
 537             if (component.equals(new ComponentName(getActivity(), MediaService.class))) {
 538                 Log_OC.d(TAG, "Media service connected");
 539                 mMediaServiceBinder = (MediaServiceBinder) service;
 540                 if (mMediaServiceBinder != null) {
 541                     prepareMediaController();
 542                     playAudio();    // do not wait for the touch of nobody to play audio
 543
 544                     Log_OC.d(TAG, "Successfully bound to MediaService, MediaController ready");
 545
 546                 } else {
 547                     Log_OC.e(TAG, "Unexpected response from MediaService while binding");
 548                 }
 549             }
 550         }
 551
 552         private void prepareMediaController() {
 553             mMediaServiceBinder.registerMediaController(mMediaController);
 554             if (mMediaController != null) {
 555                 mMediaController.setMediaPlayer(mMediaServiceBinder);
 556                 mMediaController.setEnabled(true);
 557                 mMediaController.updatePausePlay();
 558             }
 559         }
 560
 561         @Override
 562         public void onServiceDisconnected(ComponentName component) {
 563             if (component.equals(new ComponentName(getActivity(), MediaService.class))) {
 564                 Log_OC.e(TAG, "Media service suddenly disconnected");
 565                 if (mMediaController != null) {
 566                     mMediaController.setMediaPlayer(null);
 567                 } else {
 568                     Toast.makeText(getActivity(), "No media controller to release when disconnected from media service", Toast.LENGTH_SHORT).show();
 569                 }
 570                 mMediaServiceBinder = null;
 571                 mMediaServiceConnection = null;
 572             }
 573         }
 574     }
 575
 576
 577
 578     /**
 579      * Opens the previewed file with an external application.
 580      *
 581      * TODO - improve this; instead of prioritize the actions available for the MIME type in the server,
 582      * we should get a list of available apps for MIME tpye in the server and join it with the list of
 583      * available apps for the MIME type known from the file extension, to let the user choose
 584      */
 585     private void openFile() {
 586         OCFile file = getFile();
 587         stopPreview(true);
 588         String storagePath = file.getStoragePath();
 589         String encodedStoragePath = WebdavUtils.encodePath(storagePath);
 590         try {
 591             Intent i = new Intent(Intent.ACTION_VIEW);
 592             i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), file.getMimetype());
 593             i.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 594             startActivity(i);
 595
 596         } catch (Throwable t) {
 597             Log_OC.e(TAG, "Fail when trying to open with the mimeType provided from the ownCloud server: " + file.getMimetype());
 598             boolean toastIt = true;
 599             String mimeType = "";
 600             try {
 601                 Intent i = new Intent(Intent.ACTION_VIEW);
 602                 mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(storagePath.substring(storagePath.lastIndexOf('.') + 1));
 603                 if (mimeType == null || !mimeType.equals(file.getMimetype())) {
 604                     if (mimeType != null) {
 605                         i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), mimeType);
 606                     } else {
 607                         // desperate try
 608                         i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), "*-/*");
 609                     }
 610                     i.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 611                     startActivity(i);
 612                     toastIt = false;
 613                 }
 614
 615             } catch (IndexOutOfBoundsException e) {
 616                 Log_OC.e(TAG, "Trying to find out MIME type of a file without extension: " + storagePath);
 617
 618             } catch (ActivityNotFoundException e) {
 619                 Log_OC.e(TAG, "No activity found to handle: " + storagePath + " with MIME type " + mimeType + " obtained from extension");
 620
 621             } catch (Throwable th) {
 622                 Log_OC.e(TAG, "Unexpected problem when opening: " + storagePath, th);
 623
 624             } finally {
 625                 if (toastIt) {
 626                     Toast.makeText(getActivity(), "There is no application to handle file " + file.getFileName(), Toast.LENGTH_SHORT).show();
 627                 }
 628             }
 629
 630         }
 631         finish();
 632     }
 633
 634     /**
 635      * Starts a the removal of the previewed file.
 636      *
 637      * Shows a confirmation dialog. The action continues in {@link #onConfirmation(String)} , {@link #onNeutral(String)} or {@link #onCancel(String)},
 638      * depending upon the user selection in the dialog.
 639      */
 640     private void removeFile() {
 641         ConfirmationDialogFragment confDialog = ConfirmationDialogFragment.newInstance(
 642                 R.string.confirmation_remove_alert,
 643                 new String[]{getFile().getFileName()},
 644                 R.string.confirmation_remove_remote_and_local,
 645                 R.string.confirmation_remove_local,
 646                 R.string.common_cancel);
 647         confDialog.setOnConfirmationListener(this);
 648         confDialog.show(getFragmentManager(), ConfirmationDialogFragment.FTAG_CONFIRMATION);
 649     }
 650
 651
 652     /**
 653      * Performs the removal of the previewed file, both locally and in the server.
 654      */
 655     @Override
 656     public void onConfirmation(String callerTag) {
 657         OCFile file = getFile();
 658         if (mStorageManager.getFileById(file.getFileId()) != null) {   // check that the file is still there;
 659             stopPreview(true);
 660             mLastRemoteOperation = new RemoveFileOperation( file,      // TODO we need to review the interface with RemoteOperations, and use OCFile IDs instead of OCFile objects as parameters
 661                                                             true,
 662                                                             mStorageManager);
 663             mLastRemoteOperation.execute(mAccount, getSherlockActivity(), this, mHandler, getSherlockActivity());
 664
 665             ((FileDisplayActivity) getActivity()).showLoadingDialog();
 666         }
 667     }
 668
 669
 670     /**
 671      * Removes the file from local storage
 672      */
 673     @Override
 674     public void onNeutral(String callerTag) {
 675         // TODO this code should be made in a secondary thread,
 676         OCFile file = getFile();
 677         if (file.isDown()) {   // checks it is still there
 678             stopPreview(true);
 679             File f = new File(file.getStoragePath());
 680             f.delete();
 681             file.setStoragePath(null);
 682             mStorageManager.saveFile(file);
 683             finish();
 684         }
 685     }
 686
 687     /**
 688      * User cancelled the removal action.
 689      */
 690     @Override
 691     public void onCancel(String callerTag) {
 692         // nothing to do here
 693     }
 694
 695
 696     /**
 697      * Helper method to test if an {@link OCFile} can be passed to a {@link PreviewMediaFragment} to be previewed.
 698      *
 699      * @param file      File to test if can be previewed.
 700      * @return          'True' if the file can be handled by the fragment.
 701      */
 702     public static boolean canBePreviewed(OCFile file) {
 703         return (file != null && (file.isAudio() || file.isVideo()));
 704     }
 705
 706     /**
 707      * {@inheritDoc}
 708      */
 709     @Override
 710     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 711         if (operation.equals(mLastRemoteOperation)) {
 712             if (operation instanceof RemoveFileOperation) {
 713                 onRemoveFileOperationFinish((RemoveFileOperation)operation, result);
 714             }
 715         }
 716     }
 717
 718     private void onRemoveFileOperationFinish(RemoveFileOperation operation, RemoteOperationResult result) {
 719         ((FileDisplayActivity) getActivity()).dismissLoadingDialog();
 720         if (result.isSuccess()) {
 721             Toast msg = Toast.makeText(getActivity().getApplicationContext(), R.string.remove_success_msg, Toast.LENGTH_LONG);
 722             msg.show();
 723             finish();
 724
 725         } else {
 726             Toast msg = Toast.makeText(getActivity(), R.string.remove_fail_msg, Toast.LENGTH_LONG);
 727             msg.show();
 728             if (result.isSslRecoverableException()) {
 729                 // TODO show the SSL warning dialog
 730             }
 731         }
 732     }
 733
 734     private void stopPreview(boolean stopAudio) {
 735         OCFile file = getFile();
 736         if (file.isAudio() && stopAudio) {
 737             mMediaServiceBinder.pause();
 738
 739         } else if (file.isVideo()) {
 740             mVideoPreview.stopPlayback();
 741         }
 742     }
 743
 744
 745
 746     /**
 747      * Finishes the preview
 748      */
 749     private void finish() {
 750         getActivity().onBackPressed();
 751     }
 752
 753
 754     public int getPosition() {
 755         if (mPrepared) {
 756             mSavedPlaybackPosition = mVideoPreview.getCurrentPosition();
 757         }
 758         Log_OC.e(TAG, "getting position: " + mSavedPlaybackPosition);
 759         return mSavedPlaybackPosition;
 760     }
 761
 762     public boolean isPlaying() {
 763         if (mPrepared) {
 764             mAutoplay = mVideoPreview.isPlaying();
 765         }
 766         return mAutoplay;
 767     }
 768
 769 }