src/com/owncloud/android/ui/fragment/OCFileListFragment.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2011  Bartek Przybylski
   3  *   Copyright (C) 2012-2014 ownCloud Inc.
   4  *
   5  *   This program is free software: you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License version 2,
   7  *   as published by the Free Software Foundation.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18 package com.owncloud.android.ui.fragment;
  19
  20 import java.io.File;
  21 import java.util.ArrayList;
  22 import java.util.List;
  23
  24 import com.owncloud.android.R;
  25 import com.owncloud.android.authentication.AccountUtils;
  26 import com.owncloud.android.datamodel.FileDataStorageManager;
  27 import com.owncloud.android.datamodel.FileListCursorLoader;
  28 import com.owncloud.android.datamodel.OCFile;
  29 import com.owncloud.android.db.ProviderMeta.ProviderTableMeta;
  30 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  31 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  32 import com.owncloud.android.ui.ExtendedListView;
  33 import com.owncloud.android.ui.adapter.FileListListAdapter;
  34 import com.owncloud.android.ui.activity.FileDisplayActivity;
  35 import com.owncloud.android.ui.dialog.ConfirmationDialogFragment;
  36 import com.owncloud.android.ui.dialog.EditNameDialog;
  37 import com.owncloud.android.ui.dialog.ConfirmationDialogFragment.ConfirmationDialogFragmentListener;
  38 import com.owncloud.android.ui.dialog.EditNameDialog.EditNameDialogListener;
  39 import com.owncloud.android.ui.preview.PreviewImageFragment;
  40 import com.owncloud.android.ui.preview.PreviewMediaFragment;
  41 import com.owncloud.android.utils.Log_OC;
  42
  43 import android.accounts.Account;
  44 import android.app.Activity;
  45 import android.database.Cursor;
  46 import android.net.Uri;
  47 import android.os.Bundle;
  48 import android.support.v4.app.LoaderManager;
  49 import android.support.v4.app.LoaderManager.LoaderCallbacks;
  50 import android.support.v4.content.Loader;
  51 import android.view.ContextMenu;
  52 import android.view.MenuInflater;
  53 import android.view.MenuItem;
  54 import android.view.View;
  55 import android.widget.AdapterView;
  56 import android.widget.AdapterView.AdapterContextMenuInfo;
  57
  58 /**
  59  * A Fragment that lists all files and folders in a given path.
  60  *
  61  * TODO refactorize to get rid of direct dependency on FileDisplayActivity
  62  *
  63  * @author Bartek Przybylski
  64  * @author masensio
  65  * @author David A. Velasco
  66  */
  67 public class OCFileListFragment extends ExtendedListFragment
  68         implements EditNameDialogListener, ConfirmationDialogFragmentListener,
  69         LoaderCallbacks<Cursor>{
  70
  71     private static final String TAG = OCFileListFragment.class.getSimpleName();
  72
  73     private static final String MY_PACKAGE = OCFileListFragment.class.getPackage() != null ? OCFileListFragment.class.getPackage().getName() : "com.owncloud.android.ui.fragment";
  74     private static final String EXTRA_FILE = MY_PACKAGE + ".extra.FILE";
  75
  76     private static final String KEY_INDEXES = "INDEXES";
  77     private static final String KEY_FIRST_POSITIONS= "FIRST_POSITIONS";
  78     private static final String KEY_TOPS = "TOPS";
  79     private static final String KEY_HEIGHT_CELL = "HEIGHT_CELL";
  80
  81     private static final int LOADER_ID = 0;
  82
  83     private FileFragment.ContainerActivity mContainerActivity;
  84
  85     private OCFile mFile = null;
  86     private FileListListAdapter mAdapter;
  87     private LoaderManager mLoaderManager;
  88     private FileListCursorLoader  mCursorLoader;
  89
  90     private OCFile mTargetFile;
  91
  92     // Save the state of the scroll in browsing
  93     private ArrayList<Integer> mIndexes;
  94     private ArrayList<Integer> mFirstPositions;
  95     private ArrayList<Integer> mTops;
  96
  97     private int mHeightCell = 0;
  98
  99     /**
 100      * {@inheritDoc}
 101      */
 102     @Override
 103     public void onAttach(Activity activity) {
 104         super.onAttach(activity);
 105         Log_OC.e(TAG, "onAttach");
 106         try {
 107             mContainerActivity = (FileFragment.ContainerActivity) activity;
 108         } catch (ClassCastException e) {
 109             throw new ClassCastException(activity.toString() + " must implement " +
 110                     FileFragment.ContainerActivity.class.getSimpleName());
 111         }
 112     }
 113
 114
 115     @Override
 116     public void onDetach() {
 117         mContainerActivity = null;
 118         super.onDetach();
 119     }
 120
 121     /**
 122      * {@inheritDoc}
 123      */
 124     @Override
 125     public void onActivityCreated(Bundle savedInstanceState) {
 126         super.onActivityCreated(savedInstanceState);
 127         Log_OC.e(TAG, "onActivityCreated() start");
 128
 129         mAdapter = new FileListListAdapter(getSherlockActivity(), mContainerActivity);
 130         mLoaderManager = getLoaderManager();
 131
 132         if (savedInstanceState != null) {
 133             mFile = savedInstanceState.getParcelable(EXTRA_FILE);
 134             mIndexes = savedInstanceState.getIntegerArrayList(KEY_INDEXES);
 135             mFirstPositions = savedInstanceState.getIntegerArrayList(KEY_FIRST_POSITIONS);
 136             mTops = savedInstanceState.getIntegerArrayList(KEY_TOPS);
 137             mHeightCell = savedInstanceState.getInt(KEY_HEIGHT_CELL);
 138
 139         } else {
 140             mIndexes = new ArrayList<Integer>();
 141             mFirstPositions = new ArrayList<Integer>();
 142             mTops = new ArrayList<Integer>();
 143             mHeightCell = 0;
 144
 145         }
 146
 147         // Initialize loaderManager and makes it active
 148         mLoaderManager.initLoader(LOADER_ID, null, this);
 149
 150         setListAdapter(mAdapter);
 151
 152         registerForContextMenu(getListView());
 153         getListView().setOnCreateContextMenuListener(this);
 154
 155     }
 156
 157     /**
 158      * Saves the current listed folder.
 159      */
 160     @Override
 161     public void onSaveInstanceState (Bundle outState) {
 162         super.onSaveInstanceState(outState);
 163         outState.putParcelable(EXTRA_FILE, mFile);
 164         outState.putIntegerArrayList(KEY_INDEXES, mIndexes);
 165         outState.putIntegerArrayList(KEY_FIRST_POSITIONS, mFirstPositions);
 166         outState.putIntegerArrayList(KEY_TOPS, mTops);
 167         outState.putInt(KEY_HEIGHT_CELL, mHeightCell);
 168     }
 169
 170     /**
 171      * Call this, when the user presses the up button.
 172      *
 173      * Tries to move up the current folder one level. If the parent folder was removed from the database,
 174      * it continues browsing up until finding an existing folders.
 175      *
 176      * return       Count of folder levels browsed up.
 177      */
 178     public int onBrowseUp() {
 179         OCFile parentDir = null;
 180         int moveCount = 0;
 181
 182         if(mFile != null){
 183             FileDataStorageManager storageManager = mContainerActivity.getStorageManager();
 184
 185             String parentPath = null;
 186             if (mFile.getParentId() != FileDataStorageManager.ROOT_PARENT_ID) {
 187                 parentPath = new File(mFile.getRemotePath()).getParent();
 188                 parentPath = parentPath.endsWith(OCFile.PATH_SEPARATOR) ? parentPath : parentPath + OCFile.PATH_SEPARATOR;
 189                 parentDir = storageManager.getFileByPath(parentPath);
 190                 moveCount++;
 191             } else {
 192                 parentDir = storageManager.getFileByPath(OCFile.ROOT_PATH);    // never returns null; keep the path in root folder
 193             }
 194             while (parentDir == null) {
 195                 parentPath = new File(parentPath).getParent();
 196                 parentPath = parentPath.endsWith(OCFile.PATH_SEPARATOR) ? parentPath : parentPath + OCFile.PATH_SEPARATOR;
 197                 parentDir = storageManager.getFileByPath(parentPath);
 198                 moveCount++;
 199             }   // exit is granted because storageManager.getFileByPath("/") never returns null
 200             mFile = parentDir;
 201         }
 202
 203         if (mFile != null) {
 204             listDirectory(mFile);
 205
 206             ((FileDisplayActivity)mContainerActivity).startSyncFolderOperation(mFile);
 207
 208             // restore index and top position
 209             restoreIndexAndTopPosition();
 210
 211         }   // else - should never happen now
 212
 213         return moveCount;
 214     }
 215
 216     /*
 217      * Restore index and position
 218      */
 219     private void restoreIndexAndTopPosition() {
 220         if (mIndexes.size() > 0) {
 221             // needs to be checked; not every browse-up had a browse-down before
 222
 223             int index = mIndexes.remove(mIndexes.size() - 1);
 224
 225             int firstPosition = mFirstPositions.remove(mFirstPositions.size() -1);
 226
 227             int top = mTops.remove(mTops.size() - 1);
 228
 229             ExtendedListView list = (ExtendedListView) getListView();
 230             list.setSelectionFromTop(firstPosition, top);
 231
 232             // Move the scroll if the selection is not visible
 233             int indexPosition = mHeightCell*index;
 234             int height = list.getHeight();
 235
 236             if (indexPosition > height) {
 237                 if (android.os.Build.VERSION.SDK_INT >= 11)
 238                 {
 239                     list.smoothScrollToPosition(index);
 240                 }
 241                 else if (android.os.Build.VERSION.SDK_INT >= 8)
 242                 {
 243                     list.setSelectionFromTop(index, 0);
 244                 }
 245
 246             }
 247         }
 248     }
 249
 250     /*
 251      * Save index and top position
 252      */
 253     private void saveIndexAndTopPosition(int index) {
 254
 255         mIndexes.add(index);
 256
 257         ExtendedListView list = (ExtendedListView) getListView();
 258
 259         int firstPosition = list.getFirstVisiblePosition();
 260         mFirstPositions.add(firstPosition);
 261
 262         View view = list.getChildAt(0);
 263         int top = (view == null) ? 0 : view.getTop() ;
 264
 265         mTops.add(top);
 266
 267         // Save the height of a cell
 268         mHeightCell = (view == null || mHeightCell != 0) ? mHeightCell : view.getHeight();
 269     }
 270
 271     @Override
 272     public void onItemClick(AdapterView<?> l, View v, int position, long id) {
 273         OCFile file = mContainerActivity.getStorageManager().createFileInstance(
 274                 (Cursor) mAdapter.getItem(position));
 275         if (file != null) {
 276             if (file.isFolder()) {
 277                 // update state and view of this fragment
 278                 listDirectory(file);
 279                 // then, notify parent activity to let it update its state and view, and other fragments
 280                 mContainerActivity.onBrowsedDownTo(file);
 281                 // save index and top position
 282                 saveIndexAndTopPosition(position);
 283
 284             } else { /// Click on a file
 285                 if (PreviewImageFragment.canBePreviewed(file)) {
 286                     // preview image - it handles the download, if needed
 287                     ((FileDisplayActivity)mContainerActivity).startImagePreview(file);
 288
 289                 } else if (file.isDown()) {
 290                     if (PreviewMediaFragment.canBePreviewed(file)) {
 291                         // media preview
 292                         ((FileDisplayActivity)mContainerActivity).startMediaPreview(file, 0, true);
 293                     } else {
 294                         ((FileDisplayActivity)mContainerActivity).getFileOperationsHelper().openFile(file);
 295                     }
 296
 297                 } else {
 298                     // automatic download, preview on finish
 299                     ((FileDisplayActivity)mContainerActivity).startDownloadForPreview(file);
 300                 }
 301
 302             }
 303
 304         } else {
 305             Log_OC.d(TAG, "Null object in ListAdapter!!");
 306         }
 307
 308     }
 309
 310     /**
 311      * {@inheritDoc}
 312      */
 313     @Override
 314     public void onCreateContextMenu (ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
 315         super.onCreateContextMenu(menu, v, menuInfo);
 316         MenuInflater inflater = getSherlockActivity().getMenuInflater();
 317         inflater.inflate(R.menu.file_actions_menu, menu);
 318         AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
 319         OCFile targetFile = mContainerActivity.getStorageManager().createFileInstance(
 320                 (Cursor) mAdapter.getItem(info.position));
 321         List<Integer> toHide = new ArrayList<Integer>();
 322         List<Integer> toDisable = new ArrayList<Integer>();
 323
 324         MenuItem item = null;
 325         if (targetFile.isFolder()) {
 326             // contextual menu for folders
 327             toHide.add(R.id.action_open_file_with);
 328             toHide.add(R.id.action_download_file);
 329             toHide.add(R.id.action_cancel_download);
 330             toHide.add(R.id.action_cancel_upload);
 331             toHide.add(R.id.action_sync_file);
 332             toHide.add(R.id.action_see_details);
 333             toHide.add(R.id.action_send_file);
 334             if (    mContainerActivity.getFileDownloaderBinder().isDownloading(AccountUtils.getCurrentOwnCloudAccount(getSherlockActivity()), targetFile) ||
 335                     mContainerActivity.getFileUploaderBinder().isUploading(AccountUtils.getCurrentOwnCloudAccount(getSherlockActivity()), targetFile)           ) {
 336                 toDisable.add(R.id.action_rename_file);
 337                 toDisable.add(R.id.action_remove_file);
 338
 339             }
 340
 341         } else {
 342             // contextual menu for regular files
 343
 344             // new design: 'download' and 'open with' won't be available anymore in context menu
 345             toHide.add(R.id.action_download_file);
 346             toHide.add(R.id.action_open_file_with);
 347
 348             if (targetFile.isDown()) {
 349                 toHide.add(R.id.action_cancel_download);
 350                 toHide.add(R.id.action_cancel_upload);
 351
 352             } else {
 353                 toHide.add(R.id.action_sync_file);
 354             }
 355             if ( mContainerActivity.getFileDownloaderBinder().isDownloading(AccountUtils.getCurrentOwnCloudAccount(getSherlockActivity()), targetFile)) {
 356                 toHide.add(R.id.action_cancel_upload);
 357                 toDisable.add(R.id.action_rename_file);
 358                 toDisable.add(R.id.action_remove_file);
 359
 360             } else if ( mContainerActivity.getFileUploaderBinder().isUploading(AccountUtils.getCurrentOwnCloudAccount(getSherlockActivity()), targetFile)) {
 361                 toHide.add(R.id.action_cancel_download);
 362                 toDisable.add(R.id.action_rename_file);
 363                 toDisable.add(R.id.action_remove_file);
 364
 365             } else {
 366                 toHide.add(R.id.action_cancel_download);
 367                 toHide.add(R.id.action_cancel_upload);
 368             }
 369         }
 370
 371         // Options shareLink
 372         if (!targetFile.isShareByLink()) {
 373             toHide.add(R.id.action_unshare_file);
 374         }
 375
 376         // Send file
 377         boolean sendEnabled = getString(R.string.send_files_to_other_apps).equalsIgnoreCase("on");
 378         if (!sendEnabled) {
 379             toHide.add(R.id.action_send_file);
 380         }
 381
 382         for (int i : toHide) {
 383             item = menu.findItem(i);
 384             if (item != null) {
 385                 item.setVisible(false);
 386                 item.setEnabled(false);
 387             }
 388         }
 389
 390         for (int i : toDisable) {
 391             item = menu.findItem(i);
 392             if (item != null) {
 393                 item.setEnabled(false);
 394             }
 395         }
 396     }
 397
 398
 399     /**
 400      * {@inhericDoc}
 401      */
 402     @Override
 403     public boolean onContextItemSelected (MenuItem item) {
 404         AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
 405         mTargetFile = mContainerActivity.getStorageManager().createFileInstance(
 406                 (Cursor) mAdapter.getItem(info.position));
 407         switch (item.getItemId()) {
 408             case R.id.action_share_file: {
 409                 mContainerActivity.getFileOperationsHelper().shareFileWithLink(mTargetFile);
 410                 return true;
 411             }
 412             case R.id.action_unshare_file: {
 413                 mContainerActivity.getFileOperationsHelper().unshareFileWithLink(mTargetFile);
 414                 return true;
 415             }
 416             case R.id.action_rename_file: {
 417                 String fileName = mTargetFile.getFileName();
 418                 int extensionStart = mTargetFile.isFolder() ? -1 : fileName.lastIndexOf(".");
 419                 int selectionEnd = (extensionStart >= 0) ? extensionStart : fileName.length();
 420                 EditNameDialog dialog = EditNameDialog.newInstance(getString(R.string.rename_dialog_title), fileName, 0, selectionEnd, this);
 421                 dialog.show(getFragmentManager(), EditNameDialog.TAG);
 422                 return true;
 423             }
 424             case R.id.action_remove_file: {
 425                 int messageStringId = R.string.confirmation_remove_alert;
 426                 int posBtnStringId = R.string.confirmation_remove_remote;
 427                 int neuBtnStringId = -1;
 428                 if (mTargetFile.isFolder()) {
 429                     messageStringId = R.string.confirmation_remove_folder_alert;
 430                     posBtnStringId = R.string.confirmation_remove_remote_and_local;
 431                     neuBtnStringId = R.string.confirmation_remove_folder_local;
 432                 } else if (mTargetFile.isDown()) {
 433                     posBtnStringId = R.string.confirmation_remove_remote_and_local;
 434                     neuBtnStringId = R.string.confirmation_remove_local;
 435                 }
 436                 ConfirmationDialogFragment confDialog = ConfirmationDialogFragment.newInstance(
 437                         messageStringId,
 438                         new String[]{mTargetFile.getFileName()},
 439                         posBtnStringId,
 440                         neuBtnStringId,
 441                         R.string.common_cancel);
 442                 confDialog.setOnConfirmationListener(this);
 443                 confDialog.show(getFragmentManager(), FileDetailFragment.FTAG_CONFIRMATION);
 444                 return true;
 445             }
 446             case R.id.action_sync_file: {
 447                 mContainerActivity.getFileOperationsHelper().syncFile(mTargetFile);
 448                 return true;
 449             }
 450             case R.id.action_cancel_download: {
 451                 FileDownloaderBinder downloaderBinder = mContainerActivity.getFileDownloaderBinder();
 452                 Account account = AccountUtils.getCurrentOwnCloudAccount(getSherlockActivity());
 453                 if (downloaderBinder != null && downloaderBinder.isDownloading(account, mTargetFile)) {
 454                     downloaderBinder.cancel(account, mTargetFile);
 455                     listDirectory();
 456                     mContainerActivity.onTransferStateChanged(mTargetFile, false, false);
 457                 }
 458                 return true;
 459             }
 460             case R.id.action_cancel_upload: {
 461                 FileUploaderBinder uploaderBinder = mContainerActivity.getFileUploaderBinder();
 462                 Account account = AccountUtils.getCurrentOwnCloudAccount(getSherlockActivity());
 463                 if (uploaderBinder != null && uploaderBinder.isUploading(account, mTargetFile)) {
 464                     uploaderBinder.cancel(account, mTargetFile);
 465                     listDirectory();
 466                     mContainerActivity.onTransferStateChanged(mTargetFile, false, false);
 467                 }
 468                 return true;
 469             }
 470             case R.id.action_see_details: {
 471                 mContainerActivity.showDetails(mTargetFile);
 472                 return true;
 473             }
 474             case R.id.action_send_file: {
 475                 // Obtain the file
 476                 if (!mTargetFile.isDown()) {  // Download the file
 477                     Log_OC.d(TAG, mTargetFile.getRemotePath() + " : File must be downloaded");
 478                     ((FileDisplayActivity)mContainerActivity).startDownloadForSending(mTargetFile);
 479
 480                 } else {
 481                     ((FileDisplayActivity)mContainerActivity).getFileOperationsHelper().sendDownloadedFile(mTargetFile);
 482                 }
 483                 return true;
 484             }
 485             default:
 486                 return super.onContextItemSelected(item);
 487         }
 488     }
 489
 490
 491     /**
 492      * Use this to query the {@link OCFile} that is currently
 493      * being displayed by this fragment
 494      * @return The currently viewed OCFile
 495      */
 496     public OCFile getCurrentFile(){
 497         return mFile;
 498     }
 499
 500     /**
 501      * Calls {@link OCFileListFragment#listDirectory(OCFile)} with a null parameter
 502      */
 503     public void listDirectory(){
 504         listDirectory(null);
 505     }
 506
 507     /**
 508      * Lists the given directory on the view. When the input parameter is null,
 509      * it will either refresh the last known directory. list the root
 510      * if there never was a directory.
 511      *
 512      * @param directory File to be listed
 513      */
 514     public void listDirectory(OCFile directory) {
 515         FileDataStorageManager storageManager = mContainerActivity.getStorageManager();
 516         if (storageManager != null) {
 517
 518             // Check input parameters for null
 519             if(directory == null){
 520                 if(mFile != null){
 521                     directory = mFile;
 522                 } else {
 523                     directory = storageManager.getFileByPath("/");
 524                     if (directory == null) return; // no files, wait for sync
 525                 }
 526             }
 527
 528
 529             // If that's not a directory -> List its parent
 530             if(!directory.isFolder()){
 531                 Log_OC.w(TAG, "You see, that is not a directory -> " + directory.toString());
 532                 directory = storageManager.getFileById(directory.getParentId());
 533             }
 534
 535             swapDirectory(directory.getFileId(), storageManager);
 536
 537             if (mFile == null || !mFile.equals(directory)) {
 538                 ((ExtendedListView) getListView()).setSelectionFromTop(0, 0);
 539             }
 540             mFile = directory;
 541         }
 542     }
 543
 544
 545     /**
 546      * Change the adapted directory for a new one
 547      * @param folder                    New file to adapt. Can be NULL, meaning "no content to adapt".
 548      * @param updatedStorageManager     Optional updated storage manager; used to replace mStorageManager if is different (and not NULL)
 549      */
 550     public void swapDirectory(long parentId, FileDataStorageManager updatedStorageManager) {
 551         FileDataStorageManager storageManager = null;
 552         if (updatedStorageManager != null && updatedStorageManager != storageManager) {
 553             storageManager = updatedStorageManager;
 554         }
 555         Cursor newCursor = null;
 556         if (storageManager != null) {
 557             mAdapter.setStorageManager(storageManager);
 558             mCursorLoader.setParentId(parentId);
 559             newCursor = mCursorLoader.loadInBackground();//storageManager.getContent(folder.getFileId());
 560             Uri uri = Uri.withAppendedPath(
 561                     ProviderTableMeta.CONTENT_URI_DIR,
 562                     String.valueOf(parentId));
 563             Log_OC.d(TAG, "swapDirectory Uri " + uri);
 564             //newCursor.setNotificationUri(getSherlockActivity().getContentResolver(), uri);
 565
 566         }
 567         Cursor oldCursor = mAdapter.swapCursor(newCursor);
 568         if (oldCursor != null){
 569             oldCursor.close();
 570         }
 571         mAdapter.notifyDataSetChanged();
 572     }
 573
 574
 575     @Override
 576     public void onDismiss(EditNameDialog dialog) {
 577         if (dialog.getResult()) {
 578             String newFilename = dialog.getNewFilename();
 579             Log_OC.d(TAG, "name edit dialog dismissed with new name " + newFilename);
 580             mContainerActivity.getFileOperationsHelper().renameFile(mTargetFile, newFilename);
 581         }
 582     }
 583
 584
 585     @Override
 586     public void onConfirmation(String callerTag) {
 587         if (callerTag.equals(FileDetailFragment.FTAG_CONFIRMATION)) {
 588             FileDataStorageManager storageManager = mContainerActivity.getStorageManager();
 589             if (storageManager.getFileById(mTargetFile.getFileId()) != null) {
 590                 mContainerActivity.getFileOperationsHelper().removeFile(mTargetFile, true);
 591             }
 592         }
 593     }
 594
 595     @Override
 596     public void onNeutral(String callerTag) {
 597         mContainerActivity.getStorageManager().removeFile(mTargetFile, false, true);    // TODO perform in background task / new thread
 598         listDirectory();
 599         mContainerActivity.onTransferStateChanged(mTargetFile, false, false);
 600     }
 601
 602     @Override
 603     public void onCancel(String callerTag) {
 604         Log_OC.d(TAG, "REMOVAL CANCELED");
 605     }
 606
 607     /***
 608      *  LoaderManager.LoaderCallbacks<Cursor>
 609      */
 610
 611     /**
 612      * Instantiate and return a new Loader for the given ID. This is where the cursor is created.
 613      */
 614     @Override
 615     public Loader<Cursor> onCreateLoader(int id, Bundle bundle) {
 616         Log_OC.d(TAG, "onCreateLoader start");
 617         mCursorLoader = new FileListCursorLoader(
 618                 getSherlockActivity(),
 619                 mContainerActivity.getStorageManager());
 620         if (mFile != null) {
 621             mCursorLoader.setParentId(mFile.getFileId());
 622         } else {
 623             mCursorLoader.setParentId(1);
 624         }
 625         Log_OC.d(TAG, "onCreateLoader end");
 626         return mCursorLoader;
 627     }
 628
 629
 630     /**
 631      * Called when a previously created loader has finished its load. Here, you can start using the cursor.
 632      */
 633     @Override
 634     public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
 635         Log_OC.d(TAG, "onLoadFinished start");
 636
 637         FileDataStorageManager storageManager = mContainerActivity.getStorageManager();
 638         if (storageManager != null)  {
 639             mCursorLoader.setStorageManager(storageManager);
 640             if (mFile != null) {
 641                 mCursorLoader.setParentId(mFile.getFileId());
 642             } else {
 643                 mCursorLoader.setParentId(1);
 644             }
 645             mAdapter.swapCursor(mCursorLoader.loadInBackground());
 646         }
 647
 648 //        if(mAdapter != null && cursor != null)
 649 //            mAdapter.swapCursor(cursor); //swap the new cursor in.
 650 //        else
 651 //            Log_OC.d(TAG,"OnLoadFinished: mAdapter is null");
 652
 653         Log_OC.d(TAG, "onLoadFinished end");
 654     }
 655
 656
 657     /**
 658      *  Called when a previously created loader is being reset, thus making its data unavailable.
 659      *  It is being reset in order to create a new cursor to query different data.
 660      *  This is called when the last Cursor provided to onLoadFinished() above is about to be closed.
 661      *  We need to make sure we are no longer using it.
 662      */
 663     @Override
 664     public void onLoaderReset(Loader<Cursor> loader) {
 665         Log_OC.d(TAG, "onLoadReset start");
 666         if(mAdapter != null)
 667             mAdapter.swapCursor(null);
 668         else
 669             Log_OC.d(TAG,"OnLoadFinished: mAdapter is null");
 670         Log_OC.d(TAG, "onLoadReset end");
 671     }
 672
 673
 674 }