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

   1 /**
   2  *   ownCloud Android client application
   3  *
   4  *   @author Bartek Przybylski
   5  *   @author masensio
   6  *   @author David A. Velasco
   7  *   Copyright (C) 2011  Bartek Przybylski
   8  *   Copyright (C) 2015 ownCloud Inc.
   9  *
  10  *   This program is free software: you can redistribute it and/or modify
  11  *   it under the terms of the GNU General Public License version 2,
  12  *   as published by the Free Software Foundation.
  13  *
  14  *   This program is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *   GNU General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU General Public License
  20  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21  *
  22  */
  23 package com.owncloud.android.ui.fragment;
  24
  25 import android.app.Activity;
  26 import android.content.Intent;
  27 import android.os.Bundle;
  28 import android.support.v4.widget.SwipeRefreshLayout;
  29 import android.view.ActionMode;
  30 import android.view.ContextMenu;
  31 import android.view.Menu;
  32 import android.view.MenuInflater;
  33 import android.view.MenuItem;
  34 import android.view.View;
  35 import android.widget.AbsListView;
  36 import android.widget.AdapterView;
  37 import android.widget.AdapterView.AdapterContextMenuInfo;
  38 import android.widget.PopupMenu;
  39
  40 import com.owncloud.android.R;
  41 import com.owncloud.android.authentication.AccountUtils;
  42 import com.owncloud.android.datamodel.FileDataStorageManager;
  43 import com.owncloud.android.datamodel.OCFile;
  44 import com.owncloud.android.files.FileMenuFilter;
  45 import com.owncloud.android.lib.common.utils.Log_OC;
  46 import com.owncloud.android.lib.resources.status.OwnCloudVersion;
  47 import com.owncloud.android.ui.activity.FileActivity;
  48 import com.owncloud.android.ui.activity.FileDisplayActivity;
  49 import com.owncloud.android.ui.activity.FolderPickerActivity;
  50 import com.owncloud.android.ui.activity.OnEnforceableRefreshListener;
  51 import com.owncloud.android.ui.adapter.FileListListAdapter;
  52 import com.owncloud.android.ui.dialog.ConfirmationDialogFragment;
  53 import com.owncloud.android.ui.dialog.FileActionsDialogFragment;
  54 import com.owncloud.android.ui.dialog.RemoveFileDialogFragment;
  55 import com.owncloud.android.ui.dialog.RenameFileDialogFragment;
  56 import com.owncloud.android.ui.preview.PreviewImageFragment;
  57 import com.owncloud.android.ui.preview.PreviewMediaFragment;
  58 import com.owncloud.android.utils.FileStorageUtils;
  59 import com.owncloud.android.ui.preview.PreviewTextFragment;
  60
  61 import java.io.File;
  62
  63 /**
  64  * A Fragment that lists all files and folders in a given path.
  65  *
  66  * TODO refactor to get rid of direct dependency on FileDisplayActivity
  67  */
  68 public class OCFileListFragment extends ExtendedListFragment implements FileActionsDialogFragment.FileActionsDialogFragmentListener {
  69
  70     private static final String TAG = OCFileListFragment.class.getSimpleName();
  71
  72     private static final String MY_PACKAGE = OCFileListFragment.class.getPackage() != null ?
  73             OCFileListFragment.class.getPackage().getName() : "com.owncloud.android.ui.fragment";
  74
  75     public final static String ARG_JUST_FOLDERS = MY_PACKAGE + ".JUST_FOLDERS";
  76     public final static String ARG_ALLOW_CONTEXTUAL_ACTIONS = MY_PACKAGE + ".ALLOW_CONTEXTUAL";
  77
  78     private static final String KEY_FILE = MY_PACKAGE + ".extra.FILE";
  79
  80     private FileFragment.ContainerActivity mContainerActivity;
  81
  82     private OCFile mFile = null;
  83     private FileListListAdapter mAdapter;
  84     private boolean mJustFolders;
  85
  86     private OCFile mTargetFile;
  87
  88
  89
  90     /**
  91      * {@inheritDoc}
  92      */
  93     @Override
  94     public void onAttach(Activity activity) {
  95         super.onAttach(activity);
  96         Log_OC.e(TAG, "onAttach");
  97         try {
  98             mContainerActivity = (FileFragment.ContainerActivity) activity;
  99
 100         } catch (ClassCastException e) {
 101             throw new ClassCastException(activity.toString() + " must implement " +
 102                     FileFragment.ContainerActivity.class.getSimpleName());
 103         }
 104         try {
 105             setOnRefreshListener((OnEnforceableRefreshListener) activity);
 106
 107         } catch (ClassCastException e) {
 108             throw new ClassCastException(activity.toString() + " must implement " +
 109                     SwipeRefreshLayout.OnRefreshListener.class.getSimpleName());
 110         }
 111     }
 112
 113
 114     @Override
 115     public void onDetach() {
 116         setOnRefreshListener(null);
 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         if (savedInstanceState != null) {
 130             mFile = savedInstanceState.getParcelable(KEY_FILE);
 131         }
 132
 133         if (mJustFolders) {
 134             setFooterEnabled(false);
 135         } else {
 136             setFooterEnabled(true);
 137         }
 138
 139         Bundle args = getArguments();
 140         mJustFolders = (args == null) ? false : args.getBoolean(ARG_JUST_FOLDERS, false);
 141         mAdapter = new FileListListAdapter(
 142                 mJustFolders,
 143                 getActivity(),
 144                 mContainerActivity
 145         );
 146         setListAdapter(mAdapter);
 147
 148         registerLongClickListener();
 149   }
 150
 151     private void registerLongClickListener() {
 152         getListView().setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {
 153             @Override
 154             public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
 155                 // Capture total checked items
 156                 final int checkedCount = getListView().getCheckedItemCount();
 157                 // Set the CAB title according to total checked items
 158                 mode.setTitle(checkedCount + " Selected");
 159
 160                 if (checked){
 161                     mAdapter.setNewSelection(position,checked);
 162                 } else {
 163                     mAdapter.removeSelection(position);
 164                 }
 165             }
 166
 167             @Override
 168             public boolean onCreateActionMode(ActionMode mode, Menu menu) {
 169
 170 //                Bundle args = getArguments();
 171 //                boolean allowContextualActions =
 172 //                        (args == null) ? true : args.getBoolean(ARG_ALLOW_CONTEXTUAL_ACTIONS, true);
 173 //                if (allowContextualActions) {
 174 //                    MenuInflater inflater = getActivity().getMenuInflater();
 175 //                    inflater.inflate(R.menu.file_actions_menu, menu);
 176 //                    AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
 177 //                    OCFile targetFile = (OCFile) mAdapter.getItem(info.position);
 178 //
 179 //                    if (mContainerActivity.getStorageManager() != null) {
 180 //                        FileMenuFilter mf = new FileMenuFilter(
 181 //                                targetFile,
 182 //                                mContainerActivity.getStorageManager().getAccount(),
 183 //                                mContainerActivity,
 184 //                                getActivity()
 185 //                        );
 186 //                        mf.filter(menu);
 187 //                    }
 188 //
 189 //                    /// TODO break this direct dependency on FileDisplayActivity... if possible
 190 //                    MenuItem item = menu.findItem(R.id.action_open_file_with);
 191 //                    FileFragment frag = ((FileDisplayActivity)getActivity()).getSecondFragment();
 192 //                    if (frag != null && frag instanceof FileDetailFragment &&
 193 //                            frag.getFile().getFileId() == targetFile.getFileId()) {
 194 //                        item = menu.findItem(R.id.action_see_details);
 195 //                        if (item != null) {
 196 //                            item.setVisible(false);
 197 //                            item.setEnabled(false);
 198 //                        }
 199 //                    }
 200 //                }
 201
 202                 mode.getMenuInflater().inflate(R.menu.file_actions_menu, menu);
 203                 return true;
 204             }
 205
 206             @Override
 207             public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
 208                 return false;
 209             }
 210
 211             @Override
 212             public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
 213                 if (mAdapter.getCheckedItemPositions().size() == 1) {
 214                     return onFileActionChosen(item.getItemId(), mAdapter.getCheckedItemPositions().get(0));
 215                 } else if (mAdapter.getCheckedItemPositions().size() > 1){
 216                     return false;
 217                 }
 218                 return false;
 219             }
 220
 221             @Override
 222             public void onDestroyActionMode(ActionMode mode) {
 223                 mAdapter.removeSelection();
 224             }
 225         });
 226     }
 227
 228     // TODO Tobi needed?
 229     private void showFileAction(int fileIndex) {
 230         Bundle args = getArguments();
 231         PopupMenu pm = new PopupMenu(getActivity(),null);
 232         Menu menu = pm.getMenu();
 233
 234         boolean allowContextualActions =
 235                 (args == null) ? true : args.getBoolean(ARG_ALLOW_CONTEXTUAL_ACTIONS, true);
 236
 237         if (allowContextualActions) {
 238             MenuInflater inflater = getActivity().getMenuInflater();
 239
 240             inflater.inflate(R.menu.file_actions_menu, menu);
 241             OCFile targetFile = (OCFile) mAdapter.getItem(fileIndex);
 242
 243             if (mContainerActivity.getStorageManager() != null) {
 244                 FileMenuFilter mf = new FileMenuFilter(
 245                         targetFile,
 246                         mContainerActivity.getStorageManager().getAccount(),
 247                         mContainerActivity,
 248                         getActivity()
 249                 );
 250                 mf.filter(menu);
 251             }
 252
 253             /// TODO break this direct dependency on FileDisplayActivity... if possible
 254             MenuItem item = menu.findItem(R.id.action_open_file_with);
 255             FileFragment frag = ((FileDisplayActivity)getActivity()).getSecondFragment();
 256             if (frag != null && frag instanceof FileDetailFragment &&
 257                     frag.getFile().getFileId() == targetFile.getFileId()) {
 258                 item = menu.findItem(R.id.action_see_details);
 259                 if (item != null) {
 260                     item.setVisible(false);
 261                     item.setEnabled(false);
 262                 }
 263             }
 264
 265             FileActionsDialogFragment dialog = FileActionsDialogFragment.newInstance(menu, fileIndex, targetFile.getFileName());
 266             dialog.setTargetFragment(this, 0);
 267             dialog.show(getFragmentManager(), FileActionsDialogFragment.FTAG_FILE_ACTIONS);
 268         }
 269     }
 270
 271     /**
 272      * Saves the current listed folder.
 273      */
 274     @Override
 275     public void onSaveInstanceState(Bundle outState) {
 276         super.onSaveInstanceState(outState);
 277         outState.putParcelable(KEY_FILE, mFile);
 278     }
 279
 280     /**
 281      * Call this, when the user presses the up button.
 282      *
 283      * Tries to move up the current folder one level. If the parent folder was removed from the
 284      * database, it continues browsing up until finding an existing folders.
 285      * <p/>
 286      * return       Count of folder levels browsed up.
 287      */
 288     public int onBrowseUp() {
 289         OCFile parentDir = null;
 290         int moveCount = 0;
 291
 292         if (mFile != null) {
 293             FileDataStorageManager storageManager = mContainerActivity.getStorageManager();
 294
 295             String parentPath = null;
 296             if (mFile.getParentId() != FileDataStorageManager.ROOT_PARENT_ID) {
 297                 parentPath = new File(mFile.getRemotePath()).getParent();
 298                 parentPath = parentPath.endsWith(OCFile.PATH_SEPARATOR) ? parentPath :
 299                         parentPath + OCFile.PATH_SEPARATOR;
 300                 parentDir = storageManager.getFileByPath(parentPath);
 301                 moveCount++;
 302             } else {
 303                 parentDir = storageManager.getFileByPath(OCFile.ROOT_PATH);
 304             }
 305             while (parentDir == null) {
 306                 parentPath = new File(parentPath).getParent();
 307                 parentPath = parentPath.endsWith(OCFile.PATH_SEPARATOR) ? parentPath :
 308                         parentPath + OCFile.PATH_SEPARATOR;
 309                 parentDir = storageManager.getFileByPath(parentPath);
 310                 moveCount++;
 311             }   // exit is granted because storageManager.getFileByPath("/") never returns null
 312             mFile = parentDir;
 313
 314             // TODO Enable when "On Device" is recovered ?
 315             listDirectory(mFile /*, MainApp.getOnlyOnDevice()*/);
 316
 317             onRefresh(false);
 318
 319             // restore index and top position
 320             restoreIndexAndTopPosition();
 321
 322         }   // else - should never happen now
 323
 324         return moveCount;
 325     }
 326
 327     @Override
 328     public void onItemClick(AdapterView<?> l, View v, int position, long id) {
 329         OCFile file = (OCFile) mAdapter.getItem(position);
 330         if (file != null) {
 331             if (file.isFolder()) {
 332                 // update state and view of this fragment
 333                 // TODO Enable when "On Device" is recovered ?
 334                 listDirectory(file/*, MainApp.getOnlyOnDevice()*/);
 335                 // then, notify parent activity to let it update its state and view
 336                 mContainerActivity.onBrowsedDownTo(file);
 337                 // save index and top position
 338                 saveIndexAndTopPosition(position);
 339
 340             } else { /// Click on a file
 341                 if (PreviewImageFragment.canBePreviewed(file)) {
 342                     // preview image - it handles the download, if needed
 343                     ((FileDisplayActivity)mContainerActivity).startImagePreview(file);
 344                 } else if (PreviewTextFragment.canBePreviewed(file)){
 345                     ((FileDisplayActivity)mContainerActivity).startTextPreview(file);
 346                 } else if (file.isDown()) {
 347                     if (PreviewMediaFragment.canBePreviewed(file)) {
 348                         // media preview
 349                         ((FileDisplayActivity) mContainerActivity).startMediaPreview(file, 0, true);
 350                     } else {
 351                         mContainerActivity.getFileOperationsHelper().openFile(file);
 352                     }
 353
 354                 } else {
 355                     // automatic download, preview on finish
 356                     ((FileDisplayActivity) mContainerActivity).startDownloadForPreview(file);
 357                 }
 358
 359             }
 360
 361         } else {
 362             Log_OC.d(TAG, "Null object in ListAdapter!!");
 363         }
 364
 365     }
 366
 367     /**
 368      * {@inheritDoc}
 369      */
 370     // TODO Tobi needed?
 371     @Override
 372     public void onCreateContextMenu(
 373             ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
 374         Bundle args = getArguments();
 375         boolean allowContextualActions =
 376                 (args == null) ? true : args.getBoolean(ARG_ALLOW_CONTEXTUAL_ACTIONS, true);
 377         if (allowContextualActions) {
 378             MenuInflater inflater = getActivity().getMenuInflater();
 379             inflater.inflate(R.menu.file_actions_menu, menu);
 380             AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
 381             OCFile targetFile = (OCFile) mAdapter.getItem(info.position);
 382
 383             if (mContainerActivity.getStorageManager() != null) {
 384                 FileMenuFilter mf = new FileMenuFilter(
 385                     targetFile,
 386                     mContainerActivity.getStorageManager().getAccount(),
 387                     mContainerActivity,
 388                     getActivity()
 389                 );
 390                 mf.filter(menu);
 391             }
 392
 393             /// TODO break this direct dependency on FileDisplayActivity... if possible
 394             MenuItem item = menu.findItem(R.id.action_open_file_with);
 395             FileFragment frag = ((FileDisplayActivity)getActivity()).getSecondFragment();
 396             if (frag != null && frag instanceof FileDetailFragment &&
 397                     frag.getFile().getFileId() == targetFile.getFileId()) {
 398                 item = menu.findItem(R.id.action_see_details);
 399                 if (item != null) {
 400                     item.setVisible(false);
 401                     item.setEnabled(false);
 402                 }
 403             }
 404         }
 405     }
 406
 407     /**
 408      * {@inheritDoc}
 409      */
 410     @Override
 411     public boolean onFileActionChosen(int menuId, int filePosition) {
 412         mTargetFile = (OCFile) mAdapter.getItem(filePosition);
 413         switch (menuId) {
 414             case R.id.action_share_file: {
 415                 mContainerActivity.getFileOperationsHelper().shareFileWithLink(mTargetFile);
 416                 return true;
 417             }
 418             case R.id.action_open_file_with: {
 419                 mContainerActivity.getFileOperationsHelper().openFile(mTargetFile);
 420                 return true;
 421             }
 422             case R.id.action_unshare_file: {
 423                 mContainerActivity.getFileOperationsHelper().unshareFileWithLink(mTargetFile);
 424                 return true;
 425             }
 426             case R.id.action_rename_file: {
 427                 RenameFileDialogFragment dialog = RenameFileDialogFragment.newInstance(mTargetFile);
 428                 dialog.show(getFragmentManager(), FileDetailFragment.FTAG_RENAME_FILE);
 429                 return true;
 430             }
 431             case R.id.action_remove_file: {
 432                 RemoveFileDialogFragment dialog = RemoveFileDialogFragment.newInstance(mTargetFile);
 433                 dialog.show(getFragmentManager(), ConfirmationDialogFragment.FTAG_CONFIRMATION);
 434                 return true;
 435             }
 436             case R.id.action_download_file:
 437             case R.id.action_sync_file: {
 438                 mContainerActivity.getFileOperationsHelper().syncFile(mTargetFile);
 439                 return true;
 440             }
 441             case R.id.action_cancel_download:
 442             case R.id.action_cancel_upload: {
 443                 ((FileDisplayActivity) mContainerActivity).cancelTransference(mTargetFile);
 444                 return true;
 445             }
 446             case R.id.action_see_details: {
 447                 mContainerActivity.showDetails(mTargetFile);
 448                 return true;
 449             }
 450             case R.id.action_send_file: {
 451                 // Obtain the file
 452                 if (!mTargetFile.isDown()) {  // Download the file
 453                     Log_OC.d(TAG, mTargetFile.getRemotePath() + " : File must be downloaded");
 454                     ((FileDisplayActivity) mContainerActivity).startDownloadForSending(mTargetFile);
 455
 456                 } else {
 457                     mContainerActivity.getFileOperationsHelper().sendDownloadedFile(mTargetFile);
 458                 }
 459                 return true;
 460             }
 461             case R.id.action_move: {
 462                 Intent action = new Intent(getActivity(), FolderPickerActivity.class);
 463
 464                 // Pass mTargetFile that contains info of selected file/folder
 465                 action.putExtra(FolderPickerActivity.EXTRA_FILE, mTargetFile);
 466                 getActivity().startActivityForResult(action, FileDisplayActivity.ACTION_MOVE_FILES);
 467                 return true;
 468             }
 469             case R.id.action_favorite_file: {
 470                 mContainerActivity.getFileOperationsHelper().toggleFavorite(mTargetFile, true);
 471                 return true;
 472             }
 473             case R.id.action_unfavorite_file: {
 474                 mContainerActivity.getFileOperationsHelper().toggleFavorite(mTargetFile, false);
 475                 return true;
 476             }
 477             case R.id.action_copy:
 478                 Intent action = new Intent(getActivity(), FolderPickerActivity.class);
 479
 480                 // Pass mTargetFile that contains info of selected file/folder
 481                 action.putExtra(FolderPickerActivity.EXTRA_FILE, mTargetFile);
 482                 getActivity().startActivityForResult(action, FileDisplayActivity.ACTION_COPY_FILES);
 483                 return true;
 484             default:
 485                 return false;
 486         }
 487     }
 488
 489     /**
 490      * {@inhericDoc}
 491      */
 492     @Override
 493     public boolean onContextItemSelected (MenuItem item) {
 494         AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
 495         boolean matched = onFileActionChosen(item.getItemId(), ((AdapterContextMenuInfo) item.getMenuInfo()).position);
 496         if(!matched) {
 497             return super.onContextItemSelected(item);
 498         } else {
 499             return matched;
 500         }
 501     }
 502
 503
 504     /**
 505      * Use this to query the {@link OCFile} that is currently
 506      * being displayed by this fragment
 507      *
 508      * @return The currently viewed OCFile
 509      */
 510     public OCFile getCurrentFile() {
 511         return mFile;
 512     }
 513
 514     /**
 515      * Calls {@link OCFileListFragment#listDirectory(OCFile)} with a null parameter
 516      */
 517     public void listDirectory(/*boolean onlyOnDevice*/){
 518         listDirectory(null);
 519         // TODO Enable when "On Device" is recovered ?
 520         // listDirectory(null, onlyOnDevice);
 521     }
 522
 523     public void refreshDirectory(){
 524         // TODO Enable when "On Device" is recovered ?
 525         listDirectory(getCurrentFile()/*, MainApp.getOnlyOnDevice()*/);
 526     }
 527
 528     /**
 529      * Lists the given directory on the view. When the input parameter is null,
 530      * it will either refresh the last known directory. list the root
 531      * if there never was a directory.
 532      *
 533      * @param directory File to be listed
 534      */
 535     public void listDirectory(OCFile directory/*, boolean onlyOnDevice*/) {
 536         FileDataStorageManager storageManager = mContainerActivity.getStorageManager();
 537         if (storageManager != null) {
 538
 539             // Check input parameters for null
 540             if (directory == null) {
 541                 if (mFile != null) {
 542                     directory = mFile;
 543                 } else {
 544                     directory = storageManager.getFileByPath("/");
 545                     if (directory == null) return; // no files, wait for sync
 546                 }
 547             }
 548
 549
 550             // If that's not a directory -> List its parent
 551             if (!directory.isFolder()) {
 552                 Log_OC.w(TAG, "You see, that is not a directory -> " + directory.toString());
 553                 directory = storageManager.getFileById(directory.getParentId());
 554             }
 555
 556             // TODO Enable when "On Device" is recovered ?
 557             mAdapter.swapDirectory(directory, storageManager/*, onlyOnDevice*/);
 558             if (mFile == null || !mFile.equals(directory)) {
 559                 mCurrentListView.setSelection(0);
 560             }
 561             mFile = directory;
 562
 563             updateLayout();
 564
 565         }
 566     }
 567
 568     private void updateLayout() {
 569         if (!mJustFolders) {
 570             int filesCount = 0, foldersCount = 0, imagesCount = 0;
 571             int count = mAdapter.getCount();
 572             OCFile file;
 573             for (int i=0; i < count ; i++) {
 574                 file = (OCFile) mAdapter.getItem(i);
 575                 if (file.isFolder()) {
 576                     foldersCount++;
 577                 } else {
 578                     if (!file.isHidden()) {
 579                         filesCount++;
 580
 581                         if (file.isImage()) {
 582                             imagesCount++;
 583                         }
 584                     }
 585                 }
 586             }
 587             // set footer text
 588             setFooterText(generateFooterText(filesCount, foldersCount));
 589
 590             // decide grid vs list view
 591             OwnCloudVersion version = AccountUtils.getServerVersion(
 592                     ((FileActivity)mContainerActivity).getAccount());
 593             if (version != null && version.supportsRemoteThumbnails() &&
 594                 imagesCount > 0 && imagesCount == filesCount) {
 595                 switchToGridView();
 596                 registerLongClickListener();
 597             } else {
 598                 switchToListView();
 599             }
 600         }
 601     }
 602
 603     private String generateFooterText(int filesCount, int foldersCount) {
 604         String output;
 605         if (filesCount <= 0) {
 606             if (foldersCount <= 0) {
 607                 output = "";
 608
 609             } else if (foldersCount == 1) {
 610                 output = getResources().getString(R.string.file_list__footer__folder);
 611
 612             } else { // foldersCount > 1
 613                 output = getResources().getString(R.string.file_list__footer__folders, foldersCount);
 614             }
 615
 616         } else if (filesCount == 1) {
 617             if (foldersCount <= 0) {
 618                 output = getResources().getString(R.string.file_list__footer__file);
 619
 620             } else if (foldersCount == 1) {
 621                 output = getResources().getString(R.string.file_list__footer__file_and_folder);
 622
 623             } else { // foldersCount > 1
 624                 output = getResources().getString(R.string.file_list__footer__file_and_folders, foldersCount);
 625             }
 626         } else {    // filesCount > 1
 627             if (foldersCount <= 0) {
 628                 output = getResources().getString(R.string.file_list__footer__files, filesCount);
 629
 630             } else if (foldersCount == 1) {
 631                 output = getResources().getString(R.string.file_list__footer__files_and_folder, filesCount);
 632
 633             } else { // foldersCount > 1
 634                 output = getResources().getString(
 635                         R.string.file_list__footer__files_and_folders, filesCount, foldersCount
 636                 );
 637
 638             }
 639         }
 640         return output;
 641     }
 642
 643     public void sortByName(boolean descending) {
 644         mAdapter.setSortOrder(FileStorageUtils.SORT_NAME, descending);
 645     }
 646
 647     public void sortByDate(boolean descending) {
 648         mAdapter.setSortOrder(FileStorageUtils.SORT_DATE, descending);
 649     }
 650
 651     public void sortBySize(boolean descending) {
 652         mAdapter.setSortOrder(FileStorageUtils.SORT_SIZE, descending);
 653     }
 654 }