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             onCreateLoader(LOADER_ID, null);
 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     /**
 172      * Call this, when the user presses the up button.
 173      *
 174      * Tries to move up the current folder one level. If the parent folder was removed from the database,
 175      * it continues browsing up until finding an existing folders.
 176      *
 177      * return       Count of folder levels browsed up.
 178      */
 179     public int onBrowseUp() {
 180         OCFile parentDir = null;
 181         int moveCount = 0;
 182
 183         if(mFile != null){
 184             FileDataStorageManager storageManager = mContainerActivity.getStorageManager();
 185
 186             String parentPath = null;
 187             if (mFile.getParentId() != FileDataStorageManager.ROOT_PARENT_ID) {
 188                 parentPath = new File(mFile.getRemotePath()).getParent();
 189                 parentPath = parentPath.endsWith(OCFile.PATH_SEPARATOR) ? parentPath : parentPath + OCFile.PATH_SEPARATOR;
 190                 parentDir = storageManager.getFileByPath(parentPath);
 191                 moveCount++;
 192             } else {
 193                 parentDir = storageManager.getFileByPath(OCFile.ROOT_PATH);    // never returns null; keep the path in root folder
 194             }
 195             while (parentDir == null) {
 196                 parentPath = new File(parentPath).getParent();
 197                 parentPath = parentPath.endsWith(OCFile.PATH_SEPARATOR) ? parentPath : parentPath + OCFile.PATH_SEPARATOR;
 198                 parentDir = storageManager.getFileByPath(parentPath);
 199                 moveCount++;
 200             }   // exit is granted because storageManager.getFileByPath("/") never returns null
 201             mFile = parentDir;
 202         }
 203
 204         if (mFile != null) {
 205             listDirectory(mFile);
 206
 207             ((FileDisplayActivity)mContainerActivity).startSyncFolderOperation(mFile);
 208
 209             // restore index and top position
 210             restoreIndexAndTopPosition();
 211
 212         }   // else - should never happen now
 213
 214         return moveCount;
 215     }
 216
 217     /*
 218      * Restore index and position
 219      */
 220     private void restoreIndexAndTopPosition() {
 221         if (mIndexes.size() > 0) {
 222             // needs to be checked; not every browse-up had a browse-down before
 223
 224             int index = mIndexes.remove(mIndexes.size() - 1);
 225
 226             int firstPosition = mFirstPositions.remove(mFirstPositions.size() -1);
 227
 228             int top = mTops.remove(mTops.size() - 1);
 229
 230             ExtendedListView list = (ExtendedListView) getListView();
 231             list.setSelectionFromTop(firstPosition, top);
 232
 233             // Move the scroll if the selection is not visible
 234             int indexPosition = mHeightCell*index;
 235             int height = list.getHeight();
 236
 237             if (indexPosition > height) {
 238                 if (android.os.Build.VERSION.SDK_INT >= 11)
 239                 {
 240                     list.smoothScrollToPosition(index);
 241                 }
 242                 else if (android.os.Build.VERSION.SDK_INT >= 8)
 243                 {
 244                     list.setSelectionFromTop(index, 0);
 245                 }
 246
 247             }
 248         }
 249     }
 250
 251     /*
 252      * Save index and top position
 253      */
 254     private void saveIndexAndTopPosition(int index) {
 255
 256         mIndexes.add(index);
 257
 258         ExtendedListView list = (ExtendedListView) getListView();
 259
 260         int firstPosition = list.getFirstVisiblePosition();
 261         mFirstPositions.add(firstPosition);
 262
 263         View view = list.getChildAt(0);
 264         int top = (view == null) ? 0 : view.getTop() ;
 265
 266         mTops.add(top);
 267
 268         // Save the height of a cell
 269         mHeightCell = (view == null || mHeightCell != 0) ? mHeightCell : view.getHeight();
 270     }
 271
 272     @Override
 273     public void onItemClick(AdapterView<?> l, View v, int position, long id) {
 274         OCFile file = mContainerActivity.getStorageManager().createFileInstance(
 275                 (Cursor) mAdapter.getItem(position));
 276         if (file != null) {
 277             if (file.isFolder()) {
 278                 // update state and view of this fragment
 279                 listDirectory(file);
 280                 // then, notify parent activity to let it update its state and view, and other fragments
 281                 mContainerActivity.onBrowsedDownTo(file);
 282                 // save index and top position
 283                 saveIndexAndTopPosition(position);
 284
 285             } else { /// Click on a file
 286                 if (PreviewImageFragment.canBePreviewed(file)) {
 287                     // preview image - it handles the download, if needed
 288                     ((FileDisplayActivity)mContainerActivity).startImagePreview(file);
 289
 290                 } else if (file.isDown()) {
 291                     if (PreviewMediaFragment.canBePreviewed(file)) {
 292                         // media preview
 293                         ((FileDisplayActivity)mContainerActivity).startMediaPreview(file, 0, true);
 294                     } else {
 295                         ((FileDisplayActivity)mContainerActivity).getFileOperationsHelper().openFile(file);
 296                     }
 297
 298                 } else {
 299                     // automatic download, preview on finish
 300                     ((FileDisplayActivity)mContainerActivity).startDownloadForPreview(file);
 301                 }
 302
 303             }
 304
 305         } else {
 306             Log_OC.d(TAG, "Null object in ListAdapter!!");
 307         }
 308
 309     }
 310
 311     /**
 312      * {@inheritDoc}
 313      */
 314     @Override
 315     public void onCreateContextMenu (ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
 316         super.onCreateContextMenu(menu, v, menuInfo);
 317         MenuInflater inflater = getSherlockActivity().getMenuInflater();
 318         inflater.inflate(R.menu.file_actions_menu, menu);
 319         AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
 320         OCFile targetFile = mContainerActivity.getStorageManager().createFileInstance(
 321                 (Cursor) mAdapter.getItem(info.position));
 322         List<Integer> toHide = new ArrayList<Integer>();
 323         List<Integer> toDisable = new ArrayList<Integer>();
 324
 325         MenuItem item = null;
 326         if (targetFile.isFolder()) {
 327             // contextual menu for folders
 328             toHide.add(R.id.action_open_file_with);
 329             toHide.add(R.id.action_download_file);
 330             toHide.add(R.id.action_cancel_download);
 331             toHide.add(R.id.action_cancel_upload);
 332             toHide.add(R.id.action_sync_file);
 333             toHide.add(R.id.action_see_details);
 334             toHide.add(R.id.action_send_file);
 335             if (    mContainerActivity.getFileDownloaderBinder().isDownloading(AccountUtils.getCurrentOwnCloudAccount(getSherlockActivity()), targetFile) ||
 336                     mContainerActivity.getFileUploaderBinder().isUploading(AccountUtils.getCurrentOwnCloudAccount(getSherlockActivity()), targetFile)           ) {
 337                 toDisable.add(R.id.action_rename_file);
 338                 toDisable.add(R.id.action_remove_file);
 339
 340             }
 341
 342         } else {
 343             // contextual menu for regular files
 344
 345             // new design: 'download' and 'open with' won't be available anymore in context menu
 346             toHide.add(R.id.action_download_file);
 347             toHide.add(R.id.action_open_file_with);
 348
 349             if (targetFile.isDown()) {
 350                 toHide.add(R.id.action_cancel_download);
 351                 toHide.add(R.id.action_cancel_upload);
 352
 353             } else {
 354                 toHide.add(R.id.action_sync_file);
 355             }
 356             if ( mContainerActivity.getFileDownloaderBinder().isDownloading(AccountUtils.getCurrentOwnCloudAccount(getSherlockActivity()), targetFile)) {
 357                 toHide.add(R.id.action_cancel_upload);
 358                 toDisable.add(R.id.action_rename_file);
 359                 toDisable.add(R.id.action_remove_file);
 360
 361             } else if ( mContainerActivity.getFileUploaderBinder().isUploading(AccountUtils.getCurrentOwnCloudAccount(getSherlockActivity()), targetFile)) {
 362                 toHide.add(R.id.action_cancel_download);
 363                 toDisable.add(R.id.action_rename_file);
 364                 toDisable.add(R.id.action_remove_file);
 365
 366             } else {
 367                 toHide.add(R.id.action_cancel_download);
 368                 toHide.add(R.id.action_cancel_upload);
 369             }
 370         }
 371
 372         // Options shareLink
 373         if (!targetFile.isShareByLink()) {
 374             toHide.add(R.id.action_unshare_file);
 375         }
 376
 377         // Send file
 378         boolean sendEnabled = getString(R.string.send_files_to_other_apps).equalsIgnoreCase("on");
 379         if (!sendEnabled) {
 380             toHide.add(R.id.action_send_file);
 381         }
 382
 383         for (int i : toHide) {
 384             item = menu.findItem(i);
 385             if (item != null) {
 386                 item.setVisible(false);
 387                 item.setEnabled(false);
 388             }
 389         }
 390
 391         for (int i : toDisable) {
 392             item = menu.findItem(i);
 393             if (item != null) {
 394                 item.setEnabled(false);
 395             }
 396         }
 397     }
 398
 399
 400     /**
 401      * {@inhericDoc}
 402      */
 403     @Override
 404     public boolean onContextItemSelected (MenuItem item) {
 405         AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
 406         mTargetFile = mContainerActivity.getStorageManager().createFileInstance(
 407                 (Cursor) mAdapter.getItem(info.position));
 408         switch (item.getItemId()) {
 409             case R.id.action_share_file: {
 410                 mContainerActivity.getFileOperationsHelper().shareFileWithLink(mTargetFile);
 411                 return true;
 412             }
 413             case R.id.action_unshare_file: {
 414                 mContainerActivity.getFileOperationsHelper().unshareFileWithLink(mTargetFile);
 415                 return true;
 416             }
 417             case R.id.action_rename_file: {
 418                 String fileName = mTargetFile.getFileName();
 419                 int extensionStart = mTargetFile.isFolder() ? -1 : fileName.lastIndexOf(".");
 420                 int selectionEnd = (extensionStart >= 0) ? extensionStart : fileName.length();
 421                 EditNameDialog dialog = EditNameDialog.newInstance(getString(R.string.rename_dialog_title), fileName, 0, selectionEnd, this);
 422                 dialog.show(getFragmentManager(), EditNameDialog.TAG);
 423                 return true;
 424             }
 425             case R.id.action_remove_file: {
 426                 int messageStringId = R.string.confirmation_remove_alert;
 427                 int posBtnStringId = R.string.confirmation_remove_remote;
 428                 int neuBtnStringId = -1;
 429                 if (mTargetFile.isFolder()) {
 430                     messageStringId = R.string.confirmation_remove_folder_alert;
 431                     posBtnStringId = R.string.confirmation_remove_remote_and_local;
 432                     neuBtnStringId = R.string.confirmation_remove_folder_local;
 433                 } else if (mTargetFile.isDown()) {
 434                     posBtnStringId = R.string.confirmation_remove_remote_and_local;
 435                     neuBtnStringId = R.string.confirmation_remove_local;
 436                 }
 437                 ConfirmationDialogFragment confDialog = ConfirmationDialogFragment.newInstance(
 438                         messageStringId,
 439                         new String[]{mTargetFile.getFileName()},
 440                         posBtnStringId,
 441                         neuBtnStringId,
 442                         R.string.common_cancel);
 443                 confDialog.setOnConfirmationListener(this);
 444                 confDialog.show(getFragmentManager(), FileDetailFragment.FTAG_CONFIRMATION);
 445                 return true;
 446             }
 447             case R.id.action_sync_file: {
 448                 mContainerActivity.getFileOperationsHelper().syncFile(mTargetFile);
 449                 return true;
 450             }
 451             case R.id.action_cancel_download: {
 452                 FileDownloaderBinder downloaderBinder = mContainerActivity.getFileDownloaderBinder();
 453                 Account account = AccountUtils.getCurrentOwnCloudAccount(getSherlockActivity());
 454                 if (downloaderBinder != null && downloaderBinder.isDownloading(account, mTargetFile)) {
 455                     downloaderBinder.cancel(account, mTargetFile);
 456                     listDirectory();
 457                     mContainerActivity.onTransferStateChanged(mTargetFile, false, false);
 458                 }
 459                 return true;
 460             }
 461             case R.id.action_cancel_upload: {
 462                 FileUploaderBinder uploaderBinder = mContainerActivity.getFileUploaderBinder();
 463                 Account account = AccountUtils.getCurrentOwnCloudAccount(getSherlockActivity());
 464                 if (uploaderBinder != null && uploaderBinder.isUploading(account, mTargetFile)) {
 465                     uploaderBinder.cancel(account, mTargetFile);
 466                     listDirectory();
 467                     mContainerActivity.onTransferStateChanged(mTargetFile, false, false);
 468                 }
 469                 return true;
 470             }
 471             case R.id.action_see_details: {
 472                 mContainerActivity.showDetails(mTargetFile);
 473                 return true;
 474             }
 475             case R.id.action_send_file: {
 476                 // Obtain the file
 477                 if (!mTargetFile.isDown()) {  // Download the file
 478                     Log_OC.d(TAG, mTargetFile.getRemotePath() + " : File must be downloaded");
 479                     ((FileDisplayActivity)mContainerActivity).startDownloadForSending(mTargetFile);
 480
 481                 } else {
 482                     ((FileDisplayActivity)mContainerActivity).getFileOperationsHelper().sendDownloadedFile(mTargetFile);
 483                 }
 484                 return true;
 485             }
 486             default:
 487                 return super.onContextItemSelected(item);
 488         }
 489     }
 490
 491
 492     /**
 493      * Use this to query the {@link OCFile} that is currently
 494      * being displayed by this fragment
 495      * @return The currently viewed OCFile
 496      */
 497     public OCFile getCurrentFile(){
 498         return mFile;
 499     }
 500
 501     /**
 502      * Calls {@link OCFileListFragment#listDirectory(OCFile)} with a null parameter
 503      */
 504     public void listDirectory(){
 505         listDirectory(null);
 506     }
 507
 508     /**
 509      * Lists the given directory on the view. When the input parameter is null,
 510      * it will either refresh the last known directory. list the root
 511      * if there never was a directory.
 512      *
 513      * @param directory File to be listed
 514      */
 515     public void listDirectory(OCFile directory) {
 516         FileDataStorageManager storageManager = mContainerActivity.getStorageManager();
 517         if (storageManager != null) {
 518
 519             // Check input parameters for null
 520             if(directory == null){
 521                 if(mFile != null){
 522                     directory = mFile;
 523                 } else {
 524                     directory = storageManager.getFileByPath("/");
 525                     if (directory == null) return; // no files, wait for sync
 526                 }
 527             }
 528
 529
 530             // If that's not a directory -> List its parent
 531             if(!directory.isFolder()){
 532                 Log_OC.w(TAG, "You see, that is not a directory -> " + directory.toString());
 533                 directory = storageManager.getFileById(directory.getParentId());
 534             }
 535
 536             swapDirectory(directory.getFileId(), storageManager);
 537
 538             if (mFile == null || !mFile.equals(directory)) {
 539                 ((ExtendedListView) getListView()).setSelectionFromTop(0, 0);
 540             }
 541             mFile = directory;
 542         }
 543     }
 544
 545
 546     /**
 547      * Change the adapted directory for a new one
 548      * @param folder                    New file to adapt. Can be NULL, meaning "no content to adapt".
 549      * @param updatedStorageManager     Optional updated storage manager; used to replace mStorageManager if is different (and not NULL)
 550      */
 551     public void swapDirectory(long parentId, FileDataStorageManager updatedStorageManager) {
 552         FileDataStorageManager storageManager = null;
 553         if (updatedStorageManager != null && updatedStorageManager != storageManager) {
 554             storageManager = updatedStorageManager;
 555         }
 556         Cursor newCursor = null;
 557         if (storageManager != null) {
 558             mAdapter.setStorageManager(storageManager);
 559             mCursorLoader.setParentId(parentId);
 560             mCursorLoader.setStorageManager(storageManager);
 561             newCursor = mCursorLoader.loadInBackground();//storageManager.getContent(folder.getFileId());
 562             Uri uri = Uri.withAppendedPath(
 563                     ProviderTableMeta.CONTENT_URI_DIR,
 564                     String.valueOf(parentId));
 565             Log_OC.d(TAG, "swapDirectory Uri " + uri);
 566             //newCursor.setNotificationUri(getSherlockActivity().getContentResolver(), uri);
 567
 568         }
 569         Cursor oldCursor = mAdapter.swapCursor(newCursor);
 570         if (oldCursor != null){
 571             oldCursor.close();
 572         }
 573         mAdapter.notifyDataSetChanged();
 574     }
 575
 576
 577     @Override
 578     public void onDismiss(EditNameDialog dialog) {
 579         if (dialog.getResult()) {
 580             String newFilename = dialog.getNewFilename();
 581             Log_OC.d(TAG, "name edit dialog dismissed with new name " + newFilename);
 582             mContainerActivity.getFileOperationsHelper().renameFile(mTargetFile, newFilename);
 583         }
 584     }
 585
 586
 587     @Override
 588     public void onConfirmation(String callerTag) {
 589         if (callerTag.equals(FileDetailFragment.FTAG_CONFIRMATION)) {
 590             FileDataStorageManager storageManager = mContainerActivity.getStorageManager();
 591             if (storageManager.getFileById(mTargetFile.getFileId()) != null) {
 592                 mContainerActivity.getFileOperationsHelper().removeFile(mTargetFile, true);
 593             }
 594         }
 595     }
 596
 597     @Override
 598     public void onNeutral(String callerTag) {
 599         mContainerActivity.getStorageManager().removeFile(mTargetFile, false, true);    // TODO perform in background task / new thread
 600         listDirectory();
 601         mContainerActivity.onTransferStateChanged(mTargetFile, false, false);
 602     }
 603
 604     @Override
 605     public void onCancel(String callerTag) {
 606         Log_OC.d(TAG, "REMOVAL CANCELED");
 607     }
 608
 609     /***
 610      *  LoaderManager.LoaderCallbacks<Cursor>
 611      */
 612
 613     /**
 614      * Instantiate and return a new Loader for the given ID. This is where the cursor is created.
 615      */
 616     @Override
 617     public Loader<Cursor> onCreateLoader(int id, Bundle bundle) {
 618         Log_OC.d(TAG, "onCreateLoader start");
 619         mCursorLoader = new FileListCursorLoader(
 620                 getSherlockActivity(),
 621                 mContainerActivity.getStorageManager());
 622         if (mFile != null) {
 623             mCursorLoader.setParentId(mFile.getFileId());
 624         } else {
 625             mCursorLoader.setParentId(1);
 626         }
 627         Log_OC.d(TAG, "onCreateLoader end");
 628         return mCursorLoader;
 629     }
 630
 631
 632     /**
 633      * Called when a previously created loader has finished its load. Here, you can start using the cursor.
 634      */
 635     @Override
 636     public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
 637         Log_OC.d(TAG, "onLoadFinished start");
 638
 639         FileDataStorageManager storageManager = mContainerActivity.getStorageManager();
 640         if (storageManager != null)  {
 641             mCursorLoader.setStorageManager(storageManager);
 642             if (mFile != null) {
 643                 mCursorLoader.setParentId(mFile.getFileId());
 644             } else {
 645                 mCursorLoader.setParentId(1);
 646             }
 647             mAdapter.swapCursor(mCursorLoader.loadInBackground());
 648         }
 649
 650 //        if(mAdapter != null && cursor != null)
 651 //            mAdapter.swapCursor(cursor); //swap the new cursor in.
 652 //        else
 653 //            Log_OC.d(TAG,"OnLoadFinished: mAdapter is null");
 654
 655         Log_OC.d(TAG, "onLoadFinished end");
 656     }
 657
 658
 659     /**
 660      *  Called when a previously created loader is being reset, thus making its data unavailable.
 661      *  It is being reset in order to create a new cursor to query different data.
 662      *  This is called when the last Cursor provided to onLoadFinished() above is about to be closed.
 663      *  We need to make sure we are no longer using it.
 664      */
 665     @Override
 666     public void onLoaderReset(Loader<Cursor> loader) {
 667         Log_OC.d(TAG, "onLoadReset start");
 668         if(mAdapter != null)
 669             mAdapter.swapCursor(null);
 670         else
 671             Log_OC.d(TAG,"OnLoadFinished: mAdapter is null");
 672         Log_OC.d(TAG, "onLoadReset end");
 673     }
 674
 675
 676 }