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.Build;
  28 import android.os.Bundle;
  29 import android.support.v4.widget.SwipeRefreshLayout;
  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.AdapterView;
  36 import android.widget.AdapterView.AdapterContextMenuInfo;
  37 import android.widget.PopupMenu;
  38 import android.widget.Toast;
  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.activity.UploadFilesActivity;
  52 import com.owncloud.android.ui.adapter.FileListListAdapter;
  53 import com.owncloud.android.ui.dialog.ConfirmationDialogFragment;
  54 import com.owncloud.android.ui.dialog.CreateFolderDialogFragment;
  55 import com.owncloud.android.ui.dialog.FileActionsDialogFragment;
  56 import com.owncloud.android.ui.dialog.RemoveFileDialogFragment;
  57 import com.owncloud.android.ui.dialog.RenameFileDialogFragment;
  58 import com.owncloud.android.ui.dialog.UploadSourceDialogFragment;
  59 import com.owncloud.android.ui.preview.PreviewImageFragment;
  60 import com.owncloud.android.ui.preview.PreviewMediaFragment;
  61 import com.owncloud.android.utils.FileStorageUtils;
  62 import com.owncloud.android.ui.preview.PreviewTextFragment;
  63
  64 import java.io.File;
  65
  66 /**
  67  * A Fragment that lists all files and folders in a given path.
  68  *
  69  * TODO refactor to get rid of direct dependency on FileDisplayActivity
  70  */
  71 public class OCFileListFragment extends ExtendedListFragment implements FileActionsDialogFragment.FileActionsDialogFragmentListener {
  72
  73     private static final String TAG = OCFileListFragment.class.getSimpleName();
  74
  75     private static final String MY_PACKAGE = OCFileListFragment.class.getPackage() != null ?
  76             OCFileListFragment.class.getPackage().getName() : "com.owncloud.android.ui.fragment";
  77
  78     public final static String ARG_JUST_FOLDERS = MY_PACKAGE + ".JUST_FOLDERS";
  79     public final static String ARG_ALLOW_CONTEXTUAL_ACTIONS = MY_PACKAGE + ".ALLOW_CONTEXTUAL";
  80
  81     private static final String KEY_FILE = MY_PACKAGE + ".extra.FILE";
  82
  83     private static String DIALOG_CREATE_FOLDER = "DIALOG_CREATE_FOLDER";
  84
  85     private FileFragment.ContainerActivity mContainerActivity;
  86
  87     private OCFile mFile = null;
  88     private FileListListAdapter mAdapter;
  89     private boolean mJustFolders;
  90
  91     private OCFile mTargetFile;
  92
  93
  94
  95     /**
  96      * {@inheritDoc}
  97      */
  98     @Override
  99     public void onAttach(Activity activity) {
 100         super.onAttach(activity);
 101         Log_OC.e(TAG, "onAttach");
 102         try {
 103             mContainerActivity = (FileFragment.ContainerActivity) activity;
 104
 105         } catch (ClassCastException e) {
 106             throw new ClassCastException(activity.toString() + " must implement " +
 107                     FileFragment.ContainerActivity.class.getSimpleName());
 108         }
 109         try {
 110             setOnRefreshListener((OnEnforceableRefreshListener) activity);
 111
 112         } catch (ClassCastException e) {
 113             throw new ClassCastException(activity.toString() + " must implement " +
 114                     SwipeRefreshLayout.OnRefreshListener.class.getSimpleName());
 115         }
 116     }
 117
 118
 119     @Override
 120     public void onDetach() {
 121         setOnRefreshListener(null);
 122         mContainerActivity = null;
 123         super.onDetach();
 124     }
 125
 126     /**
 127      * {@inheritDoc}
 128      */
 129     @Override
 130     public void onActivityCreated(Bundle savedInstanceState) {
 131         super.onActivityCreated(savedInstanceState);
 132         Log_OC.e(TAG, "onActivityCreated() start");
 133
 134         if (savedInstanceState != null) {
 135             mFile = savedInstanceState.getParcelable(KEY_FILE);
 136         }
 137
 138         if (mJustFolders) {
 139             setFooterEnabled(false);
 140         } else {
 141             setFooterEnabled(true);
 142         }
 143
 144         Bundle args = getArguments();
 145         mJustFolders = (args == null) ? false : args.getBoolean(ARG_JUST_FOLDERS, false);
 146         mAdapter = new FileListListAdapter(
 147                 mJustFolders,
 148                 getActivity(),
 149                 mContainerActivity
 150         );
 151         setListAdapter(mAdapter);
 152
 153         registerLongClickListener();
 154         registerFabListeners();
 155   }
 156
 157     private void registerFabListeners() {
 158         registerFabUploadListeners();
 159         registerFabMkDirListeners();
 160         registerFabUploadFromAppListeners();
 161     }
 162
 163     private void registerFabUploadListeners() {
 164         getFabUpload().setOnClickListener(new View.OnClickListener() {
 165             @Override
 166             public void onClick(View v) {
 167                 Intent action = new Intent(getActivity(), UploadFilesActivity.class);
 168                 action.putExtra(
 169                         UploadFilesActivity.EXTRA_ACCOUNT,
 170                         ((FileActivity) getActivity()).getAccount()
 171                 );
 172                 getActivity().startActivityForResult(action, UploadSourceDialogFragment.ACTION_SELECT_MULTIPLE_FILES);
 173                 getFabMain().collapse();
 174             }
 175         });
 176
 177         getFabUpload().setOnLongClickListener(new View.OnLongClickListener() {
 178             @Override
 179             public boolean onLongClick(View v) {
 180                 Toast.makeText(getActivity(), R.string.actionbar_upload, Toast.LENGTH_SHORT).show();
 181                 return true;
 182             }
 183         });
 184     }
 185
 186     private void registerFabMkDirListeners() {
 187         getFabMkdir().setOnClickListener(new View.OnClickListener() {
 188             @Override
 189             public void onClick(View v) {
 190                 CreateFolderDialogFragment dialog =
 191                         CreateFolderDialogFragment.newInstance(mFile);
 192                 dialog.show(getActivity().getSupportFragmentManager(), FileDisplayActivity.DIALOG_CREATE_FOLDER);
 193                 getFabMain().collapse();
 194             }
 195         });
 196
 197         getFabMkdir().setOnLongClickListener(new View.OnLongClickListener() {
 198             @Override
 199             public boolean onLongClick(View v) {
 200                 Toast.makeText(getActivity(), R.string.actionbar_mkdir, Toast.LENGTH_SHORT).show();
 201                 return true;
 202             }
 203         });
 204     }
 205
 206     private void registerFabUploadFromAppListeners() {
 207         getFabUploadFromApp().setOnClickListener(new View.OnClickListener() {
 208             @Override
 209             public void onClick(View v) {
 210                 Intent action = new Intent(Intent.ACTION_GET_CONTENT);
 211                 action = action.setType("*/*").addCategory(Intent.CATEGORY_OPENABLE);
 212
 213                 //Intent.EXTRA_ALLOW_MULTIPLE is only supported on api level 18+, Jelly Bean
 214                 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
 215                     action.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
 216                 }
 217
 218                 getActivity().startActivityForResult(
 219                     Intent.createChooser(action, getString(R.string.upload_chooser_title)),
 220                     UploadSourceDialogFragment.ACTION_SELECT_CONTENT_FROM_APPS
 221                 );
 222                 getFabMain().collapse();
 223             }
 224         });
 225
 226         getFabUploadFromApp().setOnLongClickListener(new View.OnLongClickListener() {
 227             @Override
 228             public boolean onLongClick(View v) {
 229                 Toast.makeText(getActivity(),
 230                         R.string.actionbar_upload_from_apps,
 231                         Toast.LENGTH_SHORT).show();
 232                 return true;
 233             }
 234         });
 235     }
 236
 237     private void registerLongClickListener() {
 238         getListView().setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
 239             public boolean onItemLongClick(AdapterView<?> arg0, View v,
 240                                            int index, long arg3) {
 241                 showFileAction(index);
 242                 return true;
 243             }
 244         });
 245     }
 246
 247
 248     private void showFileAction(int fileIndex) {
 249         Bundle args = getArguments();
 250         PopupMenu pm = new PopupMenu(getActivity(),null);
 251         Menu menu = pm.getMenu();
 252
 253         boolean allowContextualActions =
 254                 (args == null) ? true : args.getBoolean(ARG_ALLOW_CONTEXTUAL_ACTIONS, true);
 255
 256         if (allowContextualActions) {
 257             MenuInflater inflater = getActivity().getMenuInflater();
 258
 259             inflater.inflate(R.menu.file_actions_menu, menu);
 260             OCFile targetFile = (OCFile) mAdapter.getItem(fileIndex);
 261
 262             if (mContainerActivity.getStorageManager() != null) {
 263                 FileMenuFilter mf = new FileMenuFilter(
 264                         targetFile,
 265                         mContainerActivity.getStorageManager().getAccount(),
 266                         mContainerActivity,
 267                         getActivity()
 268                 );
 269                 mf.filter(menu);
 270             }
 271
 272             /// TODO break this direct dependency on FileDisplayActivity... if possible
 273             MenuItem item = menu.findItem(R.id.action_open_file_with);
 274             FileFragment frag = ((FileDisplayActivity)getActivity()).getSecondFragment();
 275             if (frag != null && frag instanceof FileDetailFragment &&
 276                     frag.getFile().getFileId() == targetFile.getFileId()) {
 277                 item = menu.findItem(R.id.action_see_details);
 278                 if (item != null) {
 279                     item.setVisible(false);
 280                     item.setEnabled(false);
 281                 }
 282             }
 283
 284             FileActionsDialogFragment dialog = FileActionsDialogFragment.newInstance(menu, fileIndex, targetFile.getFileName());
 285             dialog.setTargetFragment(this, 0);
 286             dialog.show(getFragmentManager(), FileActionsDialogFragment.FTAG_FILE_ACTIONS);
 287         }
 288     }
 289
 290     /**
 291      * Saves the current listed folder.
 292      */
 293     @Override
 294     public void onSaveInstanceState(Bundle outState) {
 295         super.onSaveInstanceState(outState);
 296         outState.putParcelable(KEY_FILE, mFile);
 297     }
 298
 299     /**
 300      * Call this, when the user presses the up button.
 301      *
 302      * Tries to move up the current folder one level. If the parent folder was removed from the
 303      * database, it continues browsing up until finding an existing folders.
 304      * <p/>
 305      * return       Count of folder levels browsed up.
 306      */
 307     public int onBrowseUp() {
 308         OCFile parentDir = null;
 309         int moveCount = 0;
 310
 311         if (mFile != null) {
 312             FileDataStorageManager storageManager = mContainerActivity.getStorageManager();
 313
 314             String parentPath = null;
 315             if (mFile.getParentId() != FileDataStorageManager.ROOT_PARENT_ID) {
 316                 parentPath = new File(mFile.getRemotePath()).getParent();
 317                 parentPath = parentPath.endsWith(OCFile.PATH_SEPARATOR) ? parentPath :
 318                         parentPath + OCFile.PATH_SEPARATOR;
 319                 parentDir = storageManager.getFileByPath(parentPath);
 320                 moveCount++;
 321             } else {
 322                 parentDir = storageManager.getFileByPath(OCFile.ROOT_PATH);
 323             }
 324             while (parentDir == null) {
 325                 parentPath = new File(parentPath).getParent();
 326                 parentPath = parentPath.endsWith(OCFile.PATH_SEPARATOR) ? parentPath :
 327                         parentPath + OCFile.PATH_SEPARATOR;
 328                 parentDir = storageManager.getFileByPath(parentPath);
 329                 moveCount++;
 330             }   // exit is granted because storageManager.getFileByPath("/") never returns null
 331             mFile = parentDir;
 332
 333             // TODO Enable when "On Device" is recovered ?
 334             listDirectory(mFile /*, MainApp.getOnlyOnDevice()*/);
 335
 336             onRefresh(false);
 337
 338             // restore index and top position
 339             restoreIndexAndTopPosition();
 340
 341         }   // else - should never happen now
 342
 343         return moveCount;
 344     }
 345
 346     @Override
 347     public void onItemClick(AdapterView<?> l, View v, int position, long id) {
 348         OCFile file = (OCFile) mAdapter.getItem(position);
 349         if (file != null) {
 350             if (file.isFolder()) {
 351                 // update state and view of this fragment
 352                 // TODO Enable when "On Device" is recovered ?
 353                 listDirectory(file/*, MainApp.getOnlyOnDevice()*/);
 354                 // then, notify parent activity to let it update its state and view
 355                 mContainerActivity.onBrowsedDownTo(file);
 356                 // save index and top position
 357                 saveIndexAndTopPosition(position);
 358
 359             } else { /// Click on a file
 360                 if (PreviewImageFragment.canBePreviewed(file)) {
 361                     // preview image - it handles the download, if needed
 362                     ((FileDisplayActivity)mContainerActivity).startImagePreview(file);
 363                 } else if (PreviewTextFragment.canBePreviewed(file)){
 364                     ((FileDisplayActivity)mContainerActivity).startTextPreview(file);
 365                 } else if (file.isDown()) {
 366                     if (PreviewMediaFragment.canBePreviewed(file)) {
 367                         // media preview
 368                         ((FileDisplayActivity) mContainerActivity).startMediaPreview(file, 0, true);
 369                     } else {
 370                         mContainerActivity.getFileOperationsHelper().openFile(file);
 371                     }
 372
 373                 } else {
 374                     // automatic download, preview on finish
 375                     ((FileDisplayActivity) mContainerActivity).startDownloadForPreview(file);
 376                 }
 377
 378             }
 379
 380         } else {
 381             Log_OC.d(TAG, "Null object in ListAdapter!!");
 382         }
 383
 384     }
 385
 386     /**
 387      * {@inheritDoc}
 388      */
 389     @Override
 390     public void onCreateContextMenu(
 391             ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
 392         Bundle args = getArguments();
 393         boolean allowContextualActions =
 394                 (args == null) ? true : args.getBoolean(ARG_ALLOW_CONTEXTUAL_ACTIONS, true);
 395         if (allowContextualActions) {
 396             MenuInflater inflater = getActivity().getMenuInflater();
 397             inflater.inflate(R.menu.file_actions_menu, menu);
 398             AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
 399             OCFile targetFile = (OCFile) mAdapter.getItem(info.position);
 400
 401             if (mContainerActivity.getStorageManager() != null) {
 402                 FileMenuFilter mf = new FileMenuFilter(
 403                     targetFile,
 404                     mContainerActivity.getStorageManager().getAccount(),
 405                     mContainerActivity,
 406                     getActivity()
 407                 );
 408                 mf.filter(menu);
 409             }
 410
 411             /// TODO break this direct dependency on FileDisplayActivity... if possible
 412             MenuItem item = menu.findItem(R.id.action_open_file_with);
 413             FileFragment frag = ((FileDisplayActivity)getActivity()).getSecondFragment();
 414             if (frag != null && frag instanceof FileDetailFragment &&
 415                     frag.getFile().getFileId() == targetFile.getFileId()) {
 416                 item = menu.findItem(R.id.action_see_details);
 417                 if (item != null) {
 418                     item.setVisible(false);
 419                     item.setEnabled(false);
 420                 }
 421             }
 422         }
 423     }
 424
 425     /**
 426      * {@inheritDoc}
 427      */
 428     @Override
 429     public boolean onFileActionChosen(int menuId, int filePosition) {
 430         mTargetFile = (OCFile) mAdapter.getItem(filePosition);
 431         switch (menuId) {
 432             case R.id.action_share_file: {
 433                 mContainerActivity.getFileOperationsHelper().shareFileWithLink(mTargetFile);
 434                 return true;
 435             }
 436             case R.id.action_open_file_with: {
 437                 mContainerActivity.getFileOperationsHelper().openFile(mTargetFile);
 438                 return true;
 439             }
 440             case R.id.action_unshare_file: {
 441                 mContainerActivity.getFileOperationsHelper().unshareFileWithLink(mTargetFile);
 442                 return true;
 443             }
 444             case R.id.action_rename_file: {
 445                 RenameFileDialogFragment dialog = RenameFileDialogFragment.newInstance(mTargetFile);
 446                 dialog.show(getFragmentManager(), FileDetailFragment.FTAG_RENAME_FILE);
 447                 return true;
 448             }
 449             case R.id.action_remove_file: {
 450                 RemoveFileDialogFragment dialog = RemoveFileDialogFragment.newInstance(mTargetFile);
 451                 dialog.show(getFragmentManager(), ConfirmationDialogFragment.FTAG_CONFIRMATION);
 452                 return true;
 453             }
 454             case R.id.action_download_file:
 455             case R.id.action_sync_file: {
 456                 mContainerActivity.getFileOperationsHelper().syncFile(mTargetFile);
 457                 return true;
 458             }
 459             case R.id.action_cancel_download:
 460             case R.id.action_cancel_upload: {
 461                 ((FileDisplayActivity) mContainerActivity).cancelTransference(mTargetFile);
 462                 return true;
 463             }
 464             case R.id.action_see_details: {
 465                 mContainerActivity.showDetails(mTargetFile);
 466                 return true;
 467             }
 468             case R.id.action_send_file: {
 469                 // Obtain the file
 470                 if (!mTargetFile.isDown()) {  // Download the file
 471                     Log_OC.d(TAG, mTargetFile.getRemotePath() + " : File must be downloaded");
 472                     ((FileDisplayActivity) mContainerActivity).startDownloadForSending(mTargetFile);
 473
 474                 } else {
 475                     mContainerActivity.getFileOperationsHelper().sendDownloadedFile(mTargetFile);
 476                 }
 477                 return true;
 478             }
 479             case R.id.action_move: {
 480                 Intent action = new Intent(getActivity(), FolderPickerActivity.class);
 481
 482                 // Pass mTargetFile that contains info of selected file/folder
 483                 action.putExtra(FolderPickerActivity.EXTRA_FILE, mTargetFile);
 484                 getActivity().startActivityForResult(action, FileDisplayActivity.ACTION_MOVE_FILES);
 485                 return true;
 486             }
 487             case R.id.action_favorite_file: {
 488                 mContainerActivity.getFileOperationsHelper().toggleFavorite(mTargetFile, true);
 489                 return true;
 490             }
 491             case R.id.action_unfavorite_file: {
 492                 mContainerActivity.getFileOperationsHelper().toggleFavorite(mTargetFile, false);
 493                 return true;
 494             }
 495             case R.id.action_copy:
 496                 Intent action = new Intent(getActivity(), FolderPickerActivity.class);
 497
 498                 // Pass mTargetFile that contains info of selected file/folder
 499                 action.putExtra(FolderPickerActivity.EXTRA_FILE, mTargetFile);
 500                 getActivity().startActivityForResult(action, FileDisplayActivity.ACTION_COPY_FILES);
 501                 return true;
 502             default:
 503                 return false;
 504         }
 505     }
 506
 507     /**
 508      * {@inhericDoc}
 509      */
 510     @Override
 511     public boolean onContextItemSelected (MenuItem item) {
 512         AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
 513         boolean matched = onFileActionChosen(item.getItemId(), ((AdapterContextMenuInfo) item.getMenuInfo()).position);
 514         if(!matched) {
 515             return super.onContextItemSelected(item);
 516         } else {
 517             return matched;
 518         }
 519     }
 520
 521
 522     /**
 523      * Use this to query the {@link OCFile} that is currently
 524      * being displayed by this fragment
 525      *
 526      * @return The currently viewed OCFile
 527      */
 528     public OCFile getCurrentFile() {
 529         return mFile;
 530     }
 531
 532     /**
 533      * Calls {@link OCFileListFragment#listDirectory(OCFile)} with a null parameter
 534      */
 535     public void listDirectory(/*boolean onlyOnDevice*/){
 536         listDirectory(null);
 537         // TODO Enable when "On Device" is recovered ?
 538         // listDirectory(null, onlyOnDevice);
 539     }
 540
 541     public void refreshDirectory(){
 542         // TODO Enable when "On Device" is recovered ?
 543         listDirectory(getCurrentFile()/*, MainApp.getOnlyOnDevice()*/);
 544     }
 545
 546     /**
 547      * Lists the given directory on the view. When the input parameter is null,
 548      * it will either refresh the last known directory. list the root
 549      * if there never was a directory.
 550      *
 551      * @param directory File to be listed
 552      */
 553     public void listDirectory(OCFile directory/*, boolean onlyOnDevice*/) {
 554         FileDataStorageManager storageManager = mContainerActivity.getStorageManager();
 555         if (storageManager != null) {
 556
 557             // Check input parameters for null
 558             if (directory == null) {
 559                 if (mFile != null) {
 560                     directory = mFile;
 561                 } else {
 562                     directory = storageManager.getFileByPath("/");
 563                     if (directory == null) return; // no files, wait for sync
 564                 }
 565             }
 566
 567
 568             // If that's not a directory -> List its parent
 569             if (!directory.isFolder()) {
 570                 Log_OC.w(TAG, "You see, that is not a directory -> " + directory.toString());
 571                 directory = storageManager.getFileById(directory.getParentId());
 572             }
 573
 574             // TODO Enable when "On Device" is recovered ?
 575             mAdapter.swapDirectory(directory, storageManager/*, onlyOnDevice*/);
 576             if (mFile == null || !mFile.equals(directory)) {
 577                 mCurrentListView.setSelection(0);
 578             }
 579             mFile = directory;
 580
 581             updateLayout();
 582
 583         }
 584     }
 585
 586     private void updateLayout() {
 587         if (!mJustFolders) {
 588             int filesCount = 0, foldersCount = 0, imagesCount = 0;
 589             int count = mAdapter.getCount();
 590             OCFile file;
 591             for (int i=0; i < count ; i++) {
 592                 file = (OCFile) mAdapter.getItem(i);
 593                 if (file.isFolder()) {
 594                     foldersCount++;
 595                 } else {
 596                     if (!file.isHidden()) {
 597                         filesCount++;
 598
 599                         if (file.isImage()) {
 600                             imagesCount++;
 601                         }
 602                     }
 603                 }
 604             }
 605             // set footer text
 606             setFooterText(generateFooterText(filesCount, foldersCount));
 607
 608             // decide grid vs list view
 609             OwnCloudVersion version = AccountUtils.getServerVersion(
 610                     ((FileActivity)mContainerActivity).getAccount());
 611             if (version != null && version.supportsRemoteThumbnails() &&
 612                 imagesCount > 0 && imagesCount == filesCount) {
 613                 switchToGridView();
 614                 registerLongClickListener();
 615             } else {
 616                 switchToListView();
 617             }
 618         }
 619     }
 620
 621     private String generateFooterText(int filesCount, int foldersCount) {
 622         String output;
 623         if (filesCount <= 0) {
 624             if (foldersCount <= 0) {
 625                 output = "";
 626
 627             } else if (foldersCount == 1) {
 628                 output = getResources().getString(R.string.file_list__footer__folder);
 629
 630             } else { // foldersCount > 1
 631                 output = getResources().getString(R.string.file_list__footer__folders, foldersCount);
 632             }
 633
 634         } else if (filesCount == 1) {
 635             if (foldersCount <= 0) {
 636                 output = getResources().getString(R.string.file_list__footer__file);
 637
 638             } else if (foldersCount == 1) {
 639                 output = getResources().getString(R.string.file_list__footer__file_and_folder);
 640
 641             } else { // foldersCount > 1
 642                 output = getResources().getString(R.string.file_list__footer__file_and_folders, foldersCount);
 643             }
 644         } else {    // filesCount > 1
 645             if (foldersCount <= 0) {
 646                 output = getResources().getString(R.string.file_list__footer__files, filesCount);
 647
 648             } else if (foldersCount == 1) {
 649                 output = getResources().getString(R.string.file_list__footer__files_and_folder, filesCount);
 650
 651             } else { // foldersCount > 1
 652                 output = getResources().getString(
 653                         R.string.file_list__footer__files_and_folders, filesCount, foldersCount
 654                 );
 655
 656             }
 657         }
 658         return output;
 659     }
 660
 661     public void sortByName(boolean descending) {
 662         mAdapter.setSortOrder(FileStorageUtils.SORT_NAME, descending);
 663     }
 664
 665     public void sortByDate(boolean descending) {
 666         mAdapter.setSortOrder(FileStorageUtils.SORT_DATE, descending);
 667     }
 668
 669     public void sortBySize(boolean descending) {
 670         mAdapter.setSortOrder(FileStorageUtils.SORT_SIZE, descending);
 671     }
 672 }