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.MediaController;
  51 import android.widget.Toast;
  52 import android.widget.VideoView;
  53
  54 import com.actionbarsherlock.app.SherlockFragment;
  55 import com.actionbarsherlock.view.Menu;
  56 import com.actionbarsherlock.view.MenuInflater;
  57 import com.actionbarsherlock.view.MenuItem;
  58 import com.owncloud.android.datamodel.FileDataStorageManager;
  59 import com.owncloud.android.datamodel.OCFile;
  60 import com.owncloud.android.media.MediaControlView;
  61 import com.owncloud.android.media.MediaService;
  62 import com.owncloud.android.media.MediaServiceBinder;
  63 import com.owncloud.android.network.OwnCloudClientUtils;
  64 import com.owncloud.android.operations.OnRemoteOperationListener;
  65 import com.owncloud.android.operations.RemoteOperation;
  66 import com.owncloud.android.operations.RemoteOperationResult;
  67 import com.owncloud.android.operations.RemoveFileOperation;
  68 import com.owncloud.android.ui.activity.FileDetailActivity;
  69 import com.owncloud.android.ui.activity.FileDisplayActivity;
  70 import com.owncloud.android.ui.activity.TransferServiceGetter;
  71 import com.owncloud.android.ui.fragment.ConfirmationDialogFragment;
  72 import com.owncloud.android.ui.fragment.FileDetailFragment;
  73 import com.owncloud.android.ui.fragment.FileFragment;
  74
  75 import com.owncloud.android.R;
  76 import eu.alefzero.webdav.WebdavClient;
  77 import eu.alefzero.webdav.WebdavUtils;
  78
  79 /**
  80  * This fragment shows a preview of a downloaded media file (audio or video).
  81  *
  82  * Trying to get an instance with NULL {@link OCFile} or ownCloud {@link Account} values will produce an {@link IllegalStateException}.
  83  *
  84  * By now, if the {@link OCFile} passed is not downloaded, an {@link IllegalStateException} is generated on instantiation too.
  85  *
  86  * @author David A. Velasco
  87  */
  88 public class PreviewMediaFragment extends SherlockFragment implements
  89         OnTouchListener , FileFragment,
  90         ConfirmationDialogFragment.ConfirmationDialogFragmentListener, OnRemoteOperationListener  {
  91
  92     public static final String EXTRA_FILE = "FILE";
  93     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  94     private static final String EXTRA_PLAY_POSITION = "PLAY_POSITION";
  95
  96     private View mView;
  97     private OCFile mFile;
  98     private Account mAccount;
  99     private FileDataStorageManager mStorageManager;
 100     private ImageView mImagePreview;
 101     private VideoView mVideoPreview;
 102     private int mSavedPlaybackPosition;
 103
 104     private Handler mHandler;
 105     private RemoteOperation mLastRemoteOperation;
 106
 107     private MediaServiceBinder mMediaServiceBinder = null;
 108     //private MediaController mMediaController = null;
 109     private MediaControlView mMediaController = null;
 110     private MediaServiceConnection mMediaServiceConnection = null;
 111     private VideoHelper mVideoHelper;
 112
 113     private static final String TAG = PreviewMediaFragment.class.getSimpleName();
 114
 115
 116     /**
 117      * Creates a fragment to preview a file.
 118      *
 119      * When 'fileToDetail' or 'ocAccount' are null
 120      *
 121      * @param fileToDetail      An {@link OCFile} to preview in the fragment
 122      * @param ocAccount         An ownCloud account; needed to start downloads
 123      */
 124     public PreviewMediaFragment(OCFile fileToDetail, Account ocAccount) {
 125         mFile = fileToDetail;
 126         mAccount = ocAccount;
 127         mSavedPlaybackPosition = 0;
 128         mStorageManager = null; // we need a context to init this; the container activity is not available yet at this moment
 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     }
 145
 146
 147     /**
 148      * {@inheritDoc}
 149      */
 150     @Override
 151     public void onCreate(Bundle savedInstanceState) {
 152         super.onCreate(savedInstanceState);
 153         mHandler = new Handler();
 154         setHasOptionsMenu(true);
 155     }
 156
 157
 158     /**
 159      * {@inheritDoc}
 160      */
 161     @Override
 162     public View onCreateView(LayoutInflater inflater, ViewGroup container,
 163             Bundle savedInstanceState) {
 164         super.onCreateView(inflater, container, savedInstanceState);
 165
 166         mView = inflater.inflate(R.layout.file_preview, container, false);
 167
 168         mImagePreview = (ImageView)mView.findViewById(R.id.image_preview);
 169         mImagePreview.setOnTouchListener(this);
 170         mVideoPreview = (VideoView)mView.findViewById(R.id.video_preview);
 171
 172         mMediaController = (MediaControlView)mView.findViewById(R.id.media_controller);
 173
 174         //updateFileDetails(false);
 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
 203         }
 204         if (mFile == null) {
 205             throw new IllegalStateException("Instanced with a NULL OCFile");
 206         }
 207         if (mAccount == null) {
 208             throw new IllegalStateException("Instanced with a NULL ownCloud Account");
 209         }
 210         if (!mFile.isDown()) {
 211             throw new IllegalStateException("There is no local file to preview");
 212         }
 213         if (mFile.isVideo()) {
 214             mVideoPreview.setVisibility(View.VISIBLE);
 215             mImagePreview.setVisibility(View.GONE);
 216             prepareVideo();
 217
 218         } else {
 219             mVideoPreview.setVisibility(View.GONE);
 220             mImagePreview.setVisibility(View.VISIBLE);
 221         }
 222
 223     }
 224
 225
 226     /**
 227      * {@inheritDoc}
 228      */
 229     @Override
 230     public void onSaveInstanceState(Bundle outState) {
 231         super.onSaveInstanceState(outState);
 232
 233         outState.putParcelable(PreviewMediaFragment.EXTRA_FILE, mFile);
 234         outState.putParcelable(PreviewMediaFragment.EXTRA_ACCOUNT, mAccount);
 235
 236         if (mVideoPreview.isPlaying()) {
 237             outState.putInt(PreviewMediaFragment.EXTRA_PLAY_POSITION , mVideoPreview.getCurrentPosition());
 238         }
 239     }
 240
 241
 242     @Override
 243     public void onStart() {
 244         super.onStart();
 245
 246         if (mFile != null) {
 247            if (mFile.isAudio()) {
 248                bindMediaService();
 249
 250            } else if (mFile.isVideo()) {
 251                stopAudio();
 252                playVideo();
 253            }
 254         }
 255     }
 256
 257
 258     private void stopAudio() {
 259         Intent i = new Intent(getSherlockActivity(), MediaService.class);
 260         i.setAction(MediaService.ACTION_STOP_ALL);
 261         getSherlockActivity().startService(i);
 262     }
 263
 264
 265     /**
 266      * {@inheritDoc}
 267      */
 268     @Override
 269     public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
 270         super.onCreateOptionsMenu(menu, inflater);
 271
 272         inflater.inflate(R.menu.file_actions_menu, menu);
 273         List<Integer> toHide = new ArrayList<Integer>();
 274
 275         MenuItem item = null;
 276         toHide.add(R.id.action_cancel_download);
 277         toHide.add(R.id.action_cancel_upload);
 278         toHide.add(R.id.action_download_file);
 279         toHide.add(R.id.action_rename_file);    // by now
 280
 281         for (int i : toHide) {
 282             item = menu.findItem(i);
 283             if (item != null) {
 284                 item.setVisible(false);
 285                 item.setEnabled(false);
 286             }
 287         }
 288
 289     }
 290
 291
 292     /**
 293      * {@inheritDoc}
 294      */
 295     @Override
 296     public boolean onOptionsItemSelected(MenuItem item) {
 297         switch (item.getItemId()) {
 298             case R.id.action_open_file_with: {
 299                 openFile();
 300                 return true;
 301             }
 302             case R.id.action_remove_file: {
 303                 removeFile();
 304                 return true;
 305             }
 306             case R.id.action_see_details: {
 307                 seeDetails();
 308                 return true;
 309             }
 310
 311             default:
 312                 return false;
 313         }
 314     }
 315
 316
 317     private void seeDetails() {
 318         stopPreview(false);
 319         ((FileFragment.ContainerActivity)getActivity()).showFragmentWithDetails(mFile);
 320     }
 321
 322
 323     private void prepareVideo() {
 324         // create helper to get more control on the playback
 325         mVideoHelper = new VideoHelper();
 326         mVideoPreview.setOnPreparedListener(mVideoHelper);
 327         mVideoPreview.setOnCompletionListener(mVideoHelper);
 328         mVideoPreview.setOnErrorListener(mVideoHelper);
 329     }
 330
 331     private void playVideo() {
 332         // load the video file in the video player ; when done, VideoHelper#onPrepared() will be called
 333         mVideoPreview.setVideoPath(mFile.getStoragePath());
 334
 335         // create and prepare control panel for the user
 336         //mMediaController = new MediaController(getActivity());
 337         if (mMediaController != null) {
 338             mMediaController.setMediaPlayer(mVideoPreview);
 339             //mMediaController.setAnchorView(mVideoPreview);
 340             //mVideoPreview.setMediaController(mMediaController);
 341         } else {
 342             Toast.makeText(getActivity(), "No media controller to play video", Toast.LENGTH_SHORT).show();
 343         }
 344     }
 345
 346
 347     private class VideoHelper implements OnCompletionListener, OnPreparedListener, OnErrorListener {
 348
 349         /**
 350          * Called when the file is ready to be played.
 351          *
 352          * Just starts the playback.
 353          *
 354          * @param   mp    {@link MediaPlayer} instance performing the playback.
 355          */
 356         @Override
 357         public void onPrepared(MediaPlayer vp) {
 358             mVideoPreview.seekTo(mSavedPlaybackPosition);
 359             mVideoPreview.start();
 360             //mMediaController.show(MediaService.MEDIA_CONTROL_SHORT_LIFE);
 361         }
 362
 363
 364         /**
 365          * Called when the file is finished playing.
 366          *
 367          * Finishes the activity.
 368          *
 369          * @param   mp    {@link MediaPlayer} instance performing the playback.
 370          */
 371         @Override
 372         public void onCompletion(MediaPlayer  mp) {
 373             // nothing, right now
 374         }
 375
 376
 377         /**
 378          * Called when an error in playback occurs.
 379          *
 380          * @param   mp      {@link MediaPlayer} instance performing the playback.
 381          * @param   what    Type of error
 382          * @param   extra   Extra code specific to the error
 383          */
 384         @Override
 385         public boolean onError(MediaPlayer mp, int what, int extra) {
 386             Log.e(TAG, "Error in video playback, what = " + what + ", extra = " + extra);
 387
 388             /*
 389             if (mMediaController != null) {
 390                 mMediaController.hide();
 391             }
 392             */
 393
 394             if (mVideoPreview.getWindowToken() != null) {
 395                 String message = MediaService.getMessageForMediaError(getActivity(), what, extra);
 396                 new AlertDialog.Builder(getActivity())
 397                         .setMessage(message)
 398                         .setPositiveButton(android.R.string.VideoView_error_button,
 399                                 new DialogInterface.OnClickListener() {
 400                                     public void onClick(DialogInterface dialog, int whichButton) {
 401                                         dialog.dismiss();
 402                                         VideoHelper.this.onCompletion(null);
 403                                     }
 404                                 })
 405                         .setCancelable(false)
 406                         .show();
 407             }
 408             return true;
 409         }
 410
 411     }
 412
 413
 414     @Override
 415     public void onResume() {
 416         super.onResume();
 417     }
 418
 419
 420     @Override
 421     public void onPause() {
 422         super.onPause();
 423     }
 424
 425
 426     @Override
 427     public void onStop() {
 428         super.onStop();
 429         if (mMediaServiceConnection != null) {
 430             Log.d(TAG, "Unbinding from MediaService ...");
 431             if (mMediaServiceBinder != null && mMediaController != null) {
 432                 //mMediaServiceBinder.unregisterMediaController(mMediaController);
 433             }
 434             getActivity().unbindService(mMediaServiceConnection);
 435             mMediaServiceConnection = null;
 436             mMediaServiceBinder = null;
 437             /*
 438             if (mMediaController != null) {
 439                 mMediaController.hide();
 440                 mMediaController = null;
 441             }
 442             */
 443         }
 444     }
 445
 446     @Override
 447     public void onDestroy() {
 448         super.onDestroy();
 449     }
 450
 451
 452     @Override
 453     public boolean onTouch(View v, MotionEvent event) {
 454         if (event.getAction() == MotionEvent.ACTION_DOWN) {
 455             if (v == mImagePreview &&
 456                     mMediaServiceBinder != null && mFile.isAudio() && mMediaServiceBinder.isPlaying(mFile)) {
 457                 toggleMediaController(MediaService.MEDIA_CONTROL_PERMANENT);
 458                 return true;
 459
 460             } else if (v == mVideoPreview) {
 461                 toggleMediaController(MediaService.MEDIA_CONTROL_SHORT_LIFE);
 462                 return true;
 463             }
 464         }
 465         return false;
 466     }
 467
 468
 469     private void toggleMediaController(int time) {
 470         /*
 471         if (mMediaController.isShowing()) {
 472             mMediaController.hide();
 473         } else {
 474             mMediaController.show(time);
 475         }
 476         */
 477     }
 478
 479
 480     private void playAudio() {
 481         if (!mMediaServiceBinder.isPlaying(mFile)) {
 482             Log.d(TAG, "starting playback of " + mFile.getStoragePath());
 483             mMediaServiceBinder.start(mAccount, mFile);
 484
 485         } else {
 486             if (!mMediaServiceBinder.isPlaying()) {
 487                 mMediaServiceBinder.start();
 488             }
 489             if (!mMediaController.isShowing() && isVisible()) {
 490                 //mMediaController.show(MediaService.MEDIA_CONTROL_PERMANENT);
 491                 // TODO - fix strange bug; steps to trigger :
 492                 // 1. remove the "isVisible()" control
 493                 // 2. start the app and preview an audio file
 494                 // 3. exit from the app (home button, for instance) while the audio file is still being played
 495                 // 4. go to notification bar and click on the "ownCloud music app" notification
 496                 // PUM!
 497             }
 498         }
 499     }
 500
 501
 502     private void bindMediaService() {
 503         Log.d(TAG, "Binding to MediaService...");
 504         if (mMediaServiceConnection == null) {
 505             mMediaServiceConnection = new MediaServiceConnection();
 506         }
 507         getActivity().bindService(  new Intent(getActivity(),
 508                                     MediaService.class),
 509                                     mMediaServiceConnection,
 510                                     Context.BIND_AUTO_CREATE);
 511             // follow the flow in MediaServiceConnection#onServiceConnected(...)
 512     }
 513
 514     /** Defines callbacks for service binding, passed to bindService() */
 515     private class MediaServiceConnection implements ServiceConnection {
 516
 517         @Override
 518         public void onServiceConnected(ComponentName component, IBinder service) {
 519             if (component.equals(new ComponentName(getActivity(), MediaService.class))) {
 520                 Log.d(TAG, "Media service connected");
 521                 mMediaServiceBinder = (MediaServiceBinder) service;
 522                 if (mMediaServiceBinder != null) {
 523                     /*
 524                     if (mMediaController == null) {
 525                         mMediaController = new MediaController(getSherlockActivity());
 526                     }
 527                     */
 528                     prepareMediaController();
 529                     playAudio();    // do not wait for the touch of nobody to play audio
 530
 531                     Log.d(TAG, "Successfully bound to MediaService, MediaController ready");
 532
 533                 } else {
 534                     Log.e(TAG, "Unexpected response from MediaService while binding");
 535                 }
 536             }
 537         }
 538
 539         private void prepareMediaController() {
 540             //mMediaServiceBinder.registerMediaController(mMediaController);
 541             if (mMediaController != null) {
 542                 mMediaController.setMediaPlayer(mMediaServiceBinder);
 543                 //mMediaController.setAnchorView(getView());
 544                 mMediaController.setEnabled(mMediaServiceBinder.isInPlaybackState());
 545             } else {
 546                 Toast.makeText(getActivity(), "No media controller to prepare when connected to media service", Toast.LENGTH_SHORT).show();
 547             }
 548         }
 549
 550         @Override
 551         public void onServiceDisconnected(ComponentName component) {
 552             if (component.equals(new ComponentName(getActivity(), MediaService.class))) {
 553                 Log.e(TAG, "Media service suddenly disconnected");
 554                 if (mMediaController != null) {
 555                     //mMediaController.hide();
 556                     mMediaController.setMediaPlayer(null);
 557                     //mMediaController = null;
 558                 } else {
 559                     Toast.makeText(getActivity(), "No media controller to release when disconnected from media service", Toast.LENGTH_SHORT).show();
 560                 }
 561                 mMediaServiceBinder = null;
 562                 mMediaServiceConnection = null;
 563             }
 564         }
 565     }
 566
 567
 568
 569     /**
 570      * Opens the previewed file with an external application.
 571      *
 572      * TODO - improve this; instead of prioritize the actions available for the MIME type in the server,
 573      * we should get a list of available apps for MIME tpye in the server and join it with the list of
 574      * available apps for the MIME type known from the file extension, to let the user choose
 575      */
 576     private void openFile() {
 577         stopPreview(true);
 578         String storagePath = mFile.getStoragePath();
 579         String encodedStoragePath = WebdavUtils.encodePath(storagePath);
 580         try {
 581             Intent i = new Intent(Intent.ACTION_VIEW);
 582             i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), mFile.getMimetype());
 583             i.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 584             startActivity(i);
 585
 586         } catch (Throwable t) {
 587             Log.e(TAG, "Fail when trying to open with the mimeType provided from the ownCloud server: " + mFile.getMimetype());
 588             boolean toastIt = true;
 589             String mimeType = "";
 590             try {
 591                 Intent i = new Intent(Intent.ACTION_VIEW);
 592                 mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(storagePath.substring(storagePath.lastIndexOf('.') + 1));
 593                 if (mimeType == null || !mimeType.equals(mFile.getMimetype())) {
 594                     if (mimeType != null) {
 595                         i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), mimeType);
 596                     } else {
 597                         // desperate try
 598                         i.setDataAndType(Uri.parse("file://"+ encodedStoragePath), "*-/*");
 599                     }
 600                     i.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
 601                     startActivity(i);
 602                     toastIt = false;
 603                 }
 604
 605             } catch (IndexOutOfBoundsException e) {
 606                 Log.e(TAG, "Trying to find out MIME type of a file without extension: " + storagePath);
 607
 608             } catch (ActivityNotFoundException e) {
 609                 Log.e(TAG, "No activity found to handle: " + storagePath + " with MIME type " + mimeType + " obtained from extension");
 610
 611             } catch (Throwable th) {
 612                 Log.e(TAG, "Unexpected problem when opening: " + storagePath, th);
 613
 614             } finally {
 615                 if (toastIt) {
 616                     Toast.makeText(getActivity(), "There is no application to handle file " + mFile.getFileName(), Toast.LENGTH_SHORT).show();
 617                 }
 618             }
 619
 620         }
 621         finish();
 622     }
 623
 624     /**
 625      * Starts a the removal of the previewed file.
 626      *
 627      * Shows a confirmation dialog. The action continues in {@link #onConfirmation(String)} , {@link #onNeutral(String)} or {@link #onCancel(String)},
 628      * depending upon the user selection in the dialog.
 629      */
 630     private void removeFile() {
 631         ConfirmationDialogFragment confDialog = ConfirmationDialogFragment.newInstance(
 632                 R.string.confirmation_remove_alert,
 633                 new String[]{mFile.getFileName()},
 634                 R.string.confirmation_remove_remote_and_local,
 635                 R.string.confirmation_remove_local,
 636                 R.string.common_cancel);
 637         confDialog.setOnConfirmationListener(this);
 638         confDialog.show(getFragmentManager(), ConfirmationDialogFragment.FTAG_CONFIRMATION);
 639     }
 640
 641
 642     /**
 643      * Performs the removal of the previewed file, both locally and in the server.
 644      */
 645     @Override
 646     public void onConfirmation(String callerTag) {
 647         if (mStorageManager.getFileById(mFile.getFileId()) != null) {   // check that the file is still there;
 648             stopPreview(true);
 649             mLastRemoteOperation = new RemoveFileOperation( mFile,      // TODO we need to review the interface with RemoteOperations, and use OCFile IDs instead of OCFile objects as parameters
 650                                                             true,
 651                                                             mStorageManager);
 652             WebdavClient wc = OwnCloudClientUtils.createOwnCloudClient(mAccount, getSherlockActivity().getApplicationContext());
 653             mLastRemoteOperation.execute(wc, this, mHandler);
 654
 655             boolean inDisplayActivity = getActivity() instanceof FileDisplayActivity;
 656             getActivity().showDialog((inDisplayActivity)? FileDisplayActivity.DIALOG_SHORT_WAIT : FileDetailActivity.DIALOG_SHORT_WAIT);
 657         }
 658     }
 659
 660
 661     /**
 662      * Removes the file from local storage
 663      */
 664     @Override
 665     public void onNeutral(String callerTag) {
 666         // TODO this code should be made in a secondary thread,
 667         if (mFile.isDown()) {   // checks it is still there
 668             stopPreview(true);
 669             File f = new File(mFile.getStoragePath());
 670             f.delete();
 671             mFile.setStoragePath(null);
 672             mStorageManager.saveFile(mFile);
 673             finish();
 674         }
 675     }
 676
 677     /**
 678      * User cancelled the removal action.
 679      */
 680     @Override
 681     public void onCancel(String callerTag) {
 682         // nothing to do here
 683     }
 684
 685
 686     /**
 687      * {@inheritDoc}
 688      */
 689     public OCFile getFile(){
 690         return mFile;
 691     }
 692
 693     /*
 694     /**
 695      * Use this method to signal this Activity that it shall update its view.
 696      *
 697      * @param file : An {@link OCFile}
 698      *-/
 699     public void updateFileDetails(OCFile file, Account ocAccount) {
 700         mFile = file;
 701         if (ocAccount != null && (
 702                 mStorageManager == null ||
 703                 (mAccount != null && !mAccount.equals(ocAccount))
 704            )) {
 705             mStorageManager = new FileDataStorageManager(ocAccount, getActivity().getApplicationContext().getContentResolver());
 706         }
 707         mAccount = ocAccount;
 708         updateFileDetails(false);
 709     }
 710     */
 711
 712
 713     /**
 714      * Helper method to test if an {@link OCFile} can be passed to a {@link PreviewMediaFragment} to be previewed.
 715      *
 716      * @param file      File to test if can be previewed.
 717      * @return          'True' if the file can be handled by the fragment.
 718      */
 719     public static boolean canBePreviewed(OCFile file) {
 720         return (file != null && (file.isAudio() || file.isVideo()));
 721     }
 722
 723     /**
 724      * {@inheritDoc}
 725      */
 726     @Override
 727     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 728         if (operation.equals(mLastRemoteOperation)) {
 729             if (operation instanceof RemoveFileOperation) {
 730                 onRemoveFileOperationFinish((RemoveFileOperation)operation, result);
 731             }
 732         }
 733     }
 734
 735     private void onRemoveFileOperationFinish(RemoveFileOperation operation, RemoteOperationResult result) {
 736         boolean inDisplayActivity = getActivity() instanceof FileDisplayActivity;
 737         getActivity().dismissDialog((inDisplayActivity)? FileDisplayActivity.DIALOG_SHORT_WAIT : FileDetailActivity.DIALOG_SHORT_WAIT);
 738
 739         if (result.isSuccess()) {
 740             Toast msg = Toast.makeText(getActivity().getApplicationContext(), R.string.remove_success_msg, Toast.LENGTH_LONG);
 741             msg.show();
 742             finish();
 743
 744         } else {
 745             Toast msg = Toast.makeText(getActivity(), R.string.remove_fail_msg, Toast.LENGTH_LONG);
 746             msg.show();
 747             if (result.isSslRecoverableException()) {
 748                 // TODO show the SSL warning dialog
 749             }
 750         }
 751     }
 752
 753     private void stopPreview(boolean stopAudio) {
 754         if (mMediaController != null) {
 755             //mMediaController.hide();
 756         }
 757         if (mFile.isAudio() && stopAudio) {
 758             mMediaServiceBinder.pause();
 759
 760         } else if (mFile.isVideo()) {
 761             mVideoPreview.stopPlayback();
 762         }
 763     }
 764
 765
 766
 767     /**
 768      * Finishes the preview
 769      */
 770     private void finish() {
 771         Activity container = getActivity();
 772         if (container instanceof FileDisplayActivity) {
 773             // double pane
 774             FragmentTransaction transaction = getActivity().getSupportFragmentManager().beginTransaction();
 775             transaction.replace(R.id.file_details_container, new FileDetailFragment(null, null), FileDetailFragment.FTAG); // empty FileDetailFragment
 776             transaction.commit();
 777             ((FileFragment.ContainerActivity)container).onFileStateChanged();
 778         } else {
 779             container.finish();
 780         }
 781     }
 782
 783 }