app/src/main/java/com/stoutner/privacybrowser/activities/BookmarksActivity.java

   1 /*
   2  * Copyright © 2016-2019 Soren Stoutner <soren@stoutner.com>.
   3  *
   4  * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
   5  *
   6  * Privacy Browser is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Privacy Browser is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 package com.stoutner.privacybrowser.activities;
  21
  22 import android.app.Activity;
  23 import android.content.Context;
  24 import android.content.Intent;
  25 import android.database.Cursor;
  26 import android.graphics.Bitmap;
  27 import android.graphics.BitmapFactory;
  28 import android.graphics.Typeface;
  29 import android.graphics.drawable.BitmapDrawable;
  30 import android.graphics.drawable.Drawable;
  31 import android.os.Bundle;
  32 import android.support.design.widget.FloatingActionButton;
  33 import android.support.design.widget.Snackbar;
  34 import android.support.v4.app.NavUtils;
  35 import android.support.v7.app.ActionBar;
  36 import android.support.v7.app.AppCompatActivity;
  37 // `AppCompatDialogFragment` is required instead of `DialogFragment` or an error is produced on API <=22.
  38 import android.support.v7.app.AppCompatDialogFragment;
  39 import android.support.v7.widget.Toolbar;
  40 import android.util.SparseBooleanArray;
  41 import android.view.ActionMode;
  42 import android.view.Menu;
  43 import android.view.MenuItem;
  44 import android.view.View;
  45 import android.view.ViewGroup;
  46 import android.view.WindowManager;
  47 import android.widget.AbsListView;
  48 import android.widget.CursorAdapter;
  49 import android.widget.EditText;
  50 import android.widget.ImageView;
  51 import android.widget.ListView;
  52 import android.widget.RadioButton;
  53 import android.widget.TextView;
  54
  55 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
  56 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
  57 import com.stoutner.privacybrowser.dialogs.EditBookmarkDialog;
  58 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
  59 import com.stoutner.privacybrowser.dialogs.MoveToFolderDialog;
  60 import com.stoutner.privacybrowser.R;
  61 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
  62
  63 import java.io.ByteArrayOutputStream;
  64
  65 public class BookmarksActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener, EditBookmarkDialog.EditBookmarkListener,
  66         EditBookmarkFolderDialog.EditBookmarkFolderListener, MoveToFolderDialog.MoveToFolderListener {
  67
  68     // `currentFolder` is public static so it can be accessed from `MoveToFolderDialog`.
  69     // It is used in `onCreate`, `onOptionsItemSelected()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`,
  70     // and `loadFolder()`.
  71     public static String currentFolder;
  72
  73     // `checkedItemIds` is public static so it can be accessed from `MoveToFolderDialog`.  It is also used in `onCreate()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`,
  74     // and `updateMoveIcons()`.
  75     public static long[] checkedItemIds;
  76
  77
  78     // `bookmarksDatabaseHelper` is used in `onCreate()`, `onOptionsItemSelected()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`,
  79     // `onMoveToFolder()`, `deleteBookmarkFolderContents()`, `loadFolder()`, and `onDestroy()`.
  80     private BookmarksDatabaseHelper bookmarksDatabaseHelper;
  81
  82     // `bookmarksListView` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`,
  83     // `updateMoveIcons()`, `scrollBookmarks()`, and `loadFolder()`.
  84     private ListView bookmarksListView;
  85
  86     // `bookmarksCursor` is used in `onCreate()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`, `deleteBookmarkFolderContents()`,
  87     // `loadFolder()`, and `onDestroy()`.
  88     private Cursor bookmarksCursor;
  89
  90     // `bookmarksCursorAdapter` is used in `onCreate(), `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`, and `onLoadFolder()`.
  91     private CursorAdapter bookmarksCursorAdapter;
  92
  93     // `contextualActionMode` is used in `onCreate()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()` and `onMoveToFolder()`.
  94     private ActionMode contextualActionMode;
  95
  96     // `appBar` is used in `onCreate()` and `loadFolder()`.
  97     private ActionBar appBar;
  98
  99     // `oldFolderName` is used in `onCreate()` and `onSaveBookmarkFolder()`.
 100     private String oldFolderNameString;
 101
 102     // `moveBookmarkUpMenuItem` is used in `onCreate()` and `updateMoveIcons()`.
 103     private MenuItem moveBookmarkUpMenuItem;
 104
 105     // `moveBookmarkDownMenuItem` is used in `onCreate()` and `updateMoveIcons()`.
 106     private MenuItem moveBookmarkDownMenuItem;
 107
 108     // `bookmarksDeletedSnackbar` is used in `onCreate()`, `onOptionsItemSelected()`, and `onBackPressed()`.
 109     private Snackbar bookmarksDeletedSnackbar;
 110
 111     // `closeActivityAfterDismissingSnackbar` is used in `onCreate()`, `onOptionsItemSelected()`, and `onBackPressed()`.
 112     private boolean closeActivityAfterDismissingSnackbar;
 113
 114     @Override
 115     protected void onCreate(Bundle savedInstanceState) {
 116         // Disable screenshots if not allowed.
 117         if (!MainWebViewActivity.allowScreenshots) {
 118             getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
 119         }
 120
 121         // Set the activity theme.
 122         if (MainWebViewActivity.darkTheme) {
 123             setTheme(R.style.PrivacyBrowserDark_SecondaryActivity);
 124         } else {
 125             setTheme(R.style.PrivacyBrowserLight_SecondaryActivity);
 126         }
 127
 128         // Run the default commands.
 129         super.onCreate(savedInstanceState);
 130
 131         // Get the intent that launched the activity.
 132         Intent launchingIntent = getIntent();
 133
 134         // Set the current folder variable.
 135         if (launchingIntent.getStringExtra("Current Folder") != null) {  // Set the current folder from the intent.
 136             currentFolder = launchingIntent.getStringExtra("Current Folder");
 137         } else {  // Set the current folder to be `""`, which is the home folder.
 138             currentFolder = "";
 139         }
 140
 141         // Set the content view.
 142         setContentView(R.layout.bookmarks_coordinatorlayout);
 143
 144         // Use the `SupportActionBar` from `android.support.v7.app.ActionBar` until the minimum API is >= 21.
 145         final Toolbar bookmarksAppBar = findViewById(R.id.bookmarks_toolbar);
 146         setSupportActionBar(bookmarksAppBar);
 147
 148         // Get a handle for the activity, the app bar, and the ListView.
 149         final Activity bookmarksActivity = this;
 150         appBar = getSupportActionBar();
 151         bookmarksListView = findViewById(R.id.bookmarks_listview);
 152
 153         // Remove the incorrect lint warning that `appBar` might be null.
 154         assert appBar != null;
 155
 156         // Display the home arrow on the app bar.
 157         appBar.setDisplayHomeAsUpEnabled(true);
 158
 159         // Initialize the database helper.  `this` specifies the context.  The two `nulls` do not specify the database name or a `CursorFactory`.
 160         // The `0` specifies a database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
 161         bookmarksDatabaseHelper = new BookmarksDatabaseHelper(this, null, null, 0);
 162
 163         // Load the home folder.
 164         loadFolder();
 165
 166         // Set a listener so that tapping a list item loads the URL or folder.
 167         bookmarksListView.setOnItemClickListener((parent, view, position, id) -> {
 168             // Convert the id from long to int to match the format of the bookmarks database.
 169             int databaseID = (int) id;
 170
 171             // Get the bookmark cursor for this ID and move it to the first row.
 172             Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmarkCursor(databaseID);
 173             bookmarkCursor.moveToFirst();
 174
 175             // Act upon the bookmark according to the type.
 176             if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {  // The selected bookmark is a folder.
 177                 // Update the current folder.
 178                 currentFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 179
 180                 // Load the new folder.
 181                 loadFolder();
 182             } else {  // The selected bookmark is not a folder.
 183                 // Get the bookmark URL and assign it to `formattedUrlString`.
 184                 MainWebViewActivity.formattedUrlString = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL));
 185
 186                 // Set `MainWebViewActivity` to load the new URL on restart.
 187                 MainWebViewActivity.loadUrlOnRestart = true;
 188
 189                 // Update the bookmarks folder for the bookmarks drawer in `MainWebViewActivity`.
 190                 MainWebViewActivity.currentBookmarksFolder = currentFolder;
 191
 192                 // Close the bookmarks drawer and reload the bookmarks `ListView` when returning to `MainWebViewActivity`.
 193                 MainWebViewActivity.restartFromBookmarksActivity = true;
 194
 195                 // Return to `MainWebViewActivity`.
 196                 NavUtils.navigateUpFromSameTask(bookmarksActivity);
 197             }
 198
 199             // Close the `Cursor`.
 200             bookmarkCursor.close();
 201         });
 202
 203         // Get a handle for the activity.
 204         Activity activity = this;
 205
 206         // `MultiChoiceModeListener` handles long clicks.
 207         bookmarksListView.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {
 208             // Instantiate the common variables.
 209             MenuItem editBookmarkMenuItem;
 210             MenuItem deleteBookmarksMenuItem;
 211             MenuItem selectAllBookmarksMenuItem;
 212             boolean deletingBookmarks;
 213
 214             @Override
 215             public boolean onCreateActionMode(ActionMode mode, Menu menu) {
 216                 // Inflate the menu for the contextual app bar and set the title.
 217                 getMenuInflater().inflate(R.menu.bookmarks_context_menu, menu);
 218
 219                 // Set the title.
 220                 if (currentFolder.isEmpty()) {
 221                     // Use `R.string.bookmarks` if we are in the home folder.
 222                     mode.setTitle(R.string.bookmarks);
 223                 } else {  // Use the current folder name as the title.
 224                     mode.setTitle(currentFolder);
 225                 }
 226
 227                 // Get a handle for `MenuItems` that need to be selectively disabled.
 228                 moveBookmarkUpMenuItem = menu.findItem(R.id.move_bookmark_up);
 229                 moveBookmarkDownMenuItem = menu.findItem(R.id.move_bookmark_down);
 230                 editBookmarkMenuItem = menu.findItem(R.id.edit_bookmark);
 231                 deleteBookmarksMenuItem = menu.findItem(R.id.delete_bookmark);
 232                 selectAllBookmarksMenuItem = menu.findItem(R.id.context_menu_select_all_bookmarks);
 233
 234                 // Disable the delete bookmarks menu item if a delete is pending.
 235                 if (deletingBookmarks) {
 236                     deleteBookmarksMenuItem.setEnabled(false);
 237                 }
 238
 239                 // Store `contextualActionMode` so it can be closed programatically.
 240                 contextualActionMode = mode;
 241
 242                 // Make it so.
 243                 return true;
 244             }
 245
 246             @Override
 247             public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
 248                 // Get a handle for the move to folder menu item.
 249                 MenuItem moveToFolderMenuItem = menu.findItem(R.id.move_to_folder);
 250
 251                 // Get a `Cursor` with all of the folders.
 252                 Cursor folderCursor = bookmarksDatabaseHelper.getAllFoldersCursor();
 253
 254                 // Enable the move to folder menu item if at least one folder exists.
 255                 moveToFolderMenuItem.setVisible(folderCursor.getCount() > 0);
 256
 257                 // Make it so.
 258                 return true;
 259             }
 260
 261             @Override
 262             public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
 263                 // Get a long array of the selected bookmarks.
 264                 long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 265
 266                 // Calculate the number of selected bookmarks.
 267                 int numberOfSelectedBookmarks = selectedBookmarksLongArray.length;
 268
 269                 // Adjust the `ActionMode` and the `Menu` according to the number of selected bookmarks.
 270                 if (numberOfSelectedBookmarks == 0) {  // No bookmarks are selected.
 271                     // Close the `ActionMode`.
 272                     mode.finish();
 273                 } else if (numberOfSelectedBookmarks == 1) {  // One bookmark is selected.
 274                     // List the number of selected bookmarks in the subtitle.
 275                     mode.setSubtitle(getString(R.string.one_selected));
 276
 277                     // Show the `Move Up`, `Move Down`, and  `Edit` options.
 278                     moveBookmarkUpMenuItem.setVisible(true);
 279                     moveBookmarkDownMenuItem.setVisible(true);
 280                     editBookmarkMenuItem.setVisible(true);
 281
 282                     // Update the enabled status of the move icons.
 283                     updateMoveIcons();
 284                 } else {  // More than one bookmark is selected.
 285                     // List the number of selected bookmarks according to the language.
 286                     if (getString(R.string.android_asset_path).equals("ru")) {  // The Russian translation is used.
 287                         // Convert the number of selected bookmarks to a string.
 288                         String numberOfSelectedBookmarksString = String.valueOf(numberOfSelectedBookmarks);
 289
 290                         // Russian follows rule #7 at <https://developer.mozilla.org/en-US/docs/Mozilla/Localization/Localization_and_Plurals>.
 291                         if (numberOfSelectedBookmarksString.endsWith("1") && !numberOfSelectedBookmarksString.equals("11")) {  //  Ends in 1.
 292                             mode.setSubtitle(numberOfSelectedBookmarks + " " + getString(R.string.selected_russian_ends_in_1));
 293                         } else if ((numberOfSelectedBookmarksString.endsWith("2") || numberOfSelectedBookmarksString.endsWith("3") || numberOfSelectedBookmarksString.endsWith("4")) &&
 294                                 !numberOfSelectedBookmarksString.equals("12") && !numberOfSelectedBookmarksString.equals("13") && !numberOfSelectedBookmarksString.equals("14")) {  // Ends in 2-4.
 295                             mode.setSubtitle(numberOfSelectedBookmarks + " " + getString(R.string.selected_russian_ends_in_2));
 296                         } else {  // Everything else.
 297                             mode.setSubtitle(numberOfSelectedBookmarks + " " + getString(R.string.selected_russian_everything_else));
 298                         }
 299                     } else {  // Another language is used.
 300                         // List the number of selected bookmarks in the subtitle.
 301                         mode.setSubtitle(numberOfSelectedBookmarks + " " + getString(R.string.selected));
 302                     }
 303
 304                     // Hide non-applicable `MenuItems`.
 305                     moveBookmarkUpMenuItem.setVisible(false);
 306                     moveBookmarkDownMenuItem.setVisible(false);
 307                     editBookmarkMenuItem.setVisible(false);
 308                 }
 309
 310                 // Do not show `Select All` if all the bookmarks are already checked.
 311                 if (bookmarksListView.getCheckedItemIds().length == bookmarksListView.getCount()) {
 312                     selectAllBookmarksMenuItem.setVisible(false);
 313                 } else {
 314                     selectAllBookmarksMenuItem.setVisible(true);
 315                 }
 316             }
 317
 318             @Override
 319             public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
 320                 // Get the menu item ID.
 321                 int menuItemId = item.getItemId();
 322
 323                 // Instantiate the common variables.
 324                 int selectedBookmarkPosition;
 325                 int selectedBookmarkNewPosition;
 326                 final SparseBooleanArray selectedBookmarksPositionsSparseBooleanArray;
 327
 328                 switch (menuItemId) {
 329                     case R.id.move_bookmark_up:
 330                         // Get the array of checked bookmark positions.
 331                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 332
 333                         // Store the position of the selected bookmark.  Only one bookmark is selected when `move_bookmark_up` is enabled.
 334                         selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(0);
 335
 336                         // Calculate the new position of the selected bookmark.
 337                         selectedBookmarkNewPosition = selectedBookmarkPosition - 1;
 338
 339                         // Iterate through the bookmarks.
 340                         for (int i = 0; i < bookmarksListView.getCount(); i++) {
 341                             // Get the database ID for the current bookmark.
 342                             int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 343
 344                             // Update the display order for the current bookmark.
 345                             if (i == selectedBookmarkPosition) {  // The current bookmark is the selected bookmark.
 346                                 // Move the current bookmark up one.
 347                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i - 1);
 348                             } else if ((i + 1) == selectedBookmarkPosition){  // The current bookmark is immediately above the selected bookmark.
 349                                 // Move the current bookmark down one.
 350                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i + 1);
 351                             } else {  // The current bookmark is not changing positions.
 352                                 // Move `bookmarksCursor` to the current bookmark position.
 353                                 bookmarksCursor.moveToPosition(i);
 354
 355                                 // Update the display order only if it is not correct in the database.
 356                                 if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
 357                                     bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
 358                                 }
 359                             }
 360                         }
 361
 362                         // Update `bookmarksCursor` with the current contents of the bookmarks database.
 363                         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
 364
 365                         // Update the `ListView`.
 366                         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 367
 368                         // Scroll with the bookmark.
 369                         scrollBookmarks(selectedBookmarkNewPosition);
 370
 371                         // Update the enabled status of the move icons.
 372                         updateMoveIcons();
 373                         break;
 374
 375                     case R.id.move_bookmark_down:
 376                         // Get the array of checked bookmark positions.
 377                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 378
 379                         // Store the position of the selected bookmark.  Only one bookmark is selected when `move_bookmark_down` is enabled.
 380                         selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(0);
 381
 382                         // Calculate the new position of the selected bookmark.
 383                         selectedBookmarkNewPosition = selectedBookmarkPosition + 1;
 384
 385                         // Iterate through the bookmarks.
 386                         for (int i = 0; i <bookmarksListView.getCount(); i++) {
 387                             // Get the database ID for the current bookmark.
 388                             int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 389
 390                             // Update the display order for the current bookmark.
 391                             if (i == selectedBookmarkPosition) {  // The current bookmark is the selected bookmark.
 392                                 // Move the current bookmark down one.
 393                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i + 1);
 394                             } else if ((i - 1) == selectedBookmarkPosition) {  // The current bookmark is immediately below the selected bookmark.
 395                                 // Move the bookmark below the selected bookmark up one.
 396                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i - 1);
 397                             } else {  // The current bookmark is not changing positions.
 398                                 // Move `bookmarksCursor` to the current bookmark position.
 399                                 bookmarksCursor.moveToPosition(i);
 400
 401                                 // Update the display order only if it is not correct in the database.
 402                                 if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
 403                                     bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
 404                                 }
 405                             }
 406                         }
 407
 408                         // Update `bookmarksCursor` with the current contents of the bookmarks database.
 409                         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
 410
 411                         // Update the `ListView`.
 412                         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 413
 414                         // Scroll with the bookmark.
 415                         scrollBookmarks(selectedBookmarkNewPosition);
 416
 417                         // Update the enabled status of the move icons.
 418                         updateMoveIcons();
 419                         break;
 420
 421                     case R.id.move_to_folder:
 422                         // Store `checkedItemIds` for use by the `AlertDialog`.
 423                         checkedItemIds = bookmarksListView.getCheckedItemIds();
 424
 425                         // Show the `MoveToFolderDialog` `AlertDialog` and name the instance `@string/move_to_folder
 426                         AppCompatDialogFragment moveToFolderDialog = new MoveToFolderDialog();
 427                         moveToFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.move_to_folder));
 428                         break;
 429
 430                     case R.id.edit_bookmark:
 431                         // Get the array of checked bookmark positions.
 432                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 433
 434                         // Get the position of the selected bookmark.  Only one bookmark is selected when `edit_bookmark_down` is enabled.
 435                         selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(0);
 436
 437                         // Move the `Cursor` to the selected position and find out if it is a folder.
 438                         bookmarksCursor.moveToPosition(selectedBookmarkPosition);
 439                         boolean isFolder = (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1);
 440
 441                         // Get the selected bookmark database ID.
 442                         int databaseId = bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper._ID));
 443
 444                         // Show the edit bookmark or edit bookmark folder dialog.
 445                         if (isFolder) {
 446                             // Save the current folder name, which is used in `onSaveBookmarkFolder()`.
 447                             oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 448
 449                             // Show the edit bookmark folder dialog.
 450                             AppCompatDialogFragment editFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId);
 451                             editFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_folder));
 452                         } else {
 453                             // Show the edit bookmark dialog.
 454                             AppCompatDialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId);
 455                             editBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_bookmark));
 456                         }
 457                         break;
 458
 459                     case R.id.delete_bookmark:
 460                         // Set the deleting bookmarks flag, which prevents the delete menu item from being enabled until the current process finishes.
 461                         deletingBookmarks = true;
 462
 463                         // Get an array of the selected row IDs.
 464                         final long[] selectedBookmarksIdsLongArray = bookmarksListView.getCheckedItemIds();
 465
 466                         // Get the array of checked bookmarks.  `.clone()` makes a copy that won't change if `bookmarksListView` is reloaded, which is needed for re-selecting the bookmarks on undelete.
 467                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions().clone();
 468
 469                         // Update `bookmarksCursor` with the current contents of the bookmarks database except for the specified database IDs.
 470                         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksCursorExcept(selectedBookmarksIdsLongArray, currentFolder);
 471
 472                         // Update the `ListView`.
 473                         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 474
 475                         // Instantiate `snackbarMessage`.
 476                         String snackbarMessage;
 477
 478                         // Determine how many items are in the array and prepare an appropriate snackbar message.
 479                         if (selectedBookmarksIdsLongArray.length == 1) {
 480                             snackbarMessage = getString(R.string.one_bookmark_deleted);
 481                         } else {
 482                             // Prepare a snackbar according to the language.
 483                             if (getString(R.string.android_asset_path).equals("ru")) {  // The Russian translation is used.
 484                                 // Convert the number of selected bookmarks to a string.
 485                                 String numberOfBookmarksString = String.valueOf(selectedBookmarksIdsLongArray.length);
 486
 487                                 // Russian follows rule #7 at <https://developer.mozilla.org/en-US/docs/Mozilla/Localization/Localization_and_Plurals>.
 488                                 if (numberOfBookmarksString.endsWith("1") && !numberOfBookmarksString.equals("11")) {  //  Ends in 1.
 489                                     snackbarMessage = numberOfBookmarksString + " " + getString(R.string.bookmarks_deleted_russian_ends_in_1);
 490                                 } else if ((numberOfBookmarksString.endsWith("2") || numberOfBookmarksString.endsWith("3") || numberOfBookmarksString.endsWith("4")) &&
 491                                         !numberOfBookmarksString.equals("12") && !numberOfBookmarksString.equals("13") && !numberOfBookmarksString.equals("14")) {  // Ends in 2-4.
 492                                     snackbarMessage = numberOfBookmarksString + " " + getString(R.string.bookmarks_deleted_russian_ends_in_2);
 493                                 } else {  // Everything else.
 494                                     snackbarMessage = numberOfBookmarksString + " " + getString(R.string.bookmarks_deleted_russian_everything_else);
 495                                 }
 496                             } else {  // Another language is used.
 497                                 snackbarMessage = selectedBookmarksIdsLongArray.length + " " + getString(R.string.bookmarks_deleted);
 498                             }
 499                         }
 500
 501                         // Show a SnackBar.
 502                         bookmarksDeletedSnackbar = Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), snackbarMessage, Snackbar.LENGTH_LONG)
 503                                 .setAction(R.string.undo, view -> {
 504                                     // Do nothing because everything will be handled by `onDismissed()` below.
 505                                 })
 506                                 .addCallback(new Snackbar.Callback() {
 507                                     @Override
 508                                     public void onDismissed(Snackbar snackbar, int event) {
 509                                         switch (event) {
 510                                             // The user pushed the `Undo` button.
 511                                             case Snackbar.Callback.DISMISS_EVENT_ACTION:
 512                                                 // Update `bookmarksCursor` with the current contents of the bookmarks database, including the "deleted" bookmarks.
 513                                                 bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
 514
 515                                                 // Update the `ListView`.
 516                                                 bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 517
 518                                                 // Re-select the previously selected bookmarks.
 519                                                 for (int i = 0; i < selectedBookmarksPositionsSparseBooleanArray.size(); i++) {
 520                                                     bookmarksListView.setItemChecked(selectedBookmarksPositionsSparseBooleanArray.keyAt(i), true);
 521                                                 }
 522
 523                                                 break;
 524
 525                                             // The `Snackbar` was dismissed without the `Undo` button being pushed.
 526                                             default:
 527                                                 // Delete each selected bookmark.
 528                                                 for (long databaseIdLong : selectedBookmarksIdsLongArray) {
 529                                                     // Convert `databaseIdLong` to an int.
 530                                                     int databaseIdInt = (int) databaseIdLong;
 531
 532                                                     // Delete the contents of the folder if the selected bookmark is a folder.
 533                                                     if (bookmarksDatabaseHelper.isFolder(databaseIdInt)) {
 534                                                         deleteBookmarkFolderContents(databaseIdInt);
 535                                                     }
 536
 537                                                     // Delete the selected bookmark.
 538                                                     bookmarksDatabaseHelper.deleteBookmark(databaseIdInt);
 539                                                 }
 540
 541                                                 // Update the display order.
 542                                                 for (int i = 0; i < bookmarksListView.getCount(); i++) {
 543                                                     // Get the database ID for the current bookmark.
 544                                                     int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 545
 546                                                     // Move `bookmarksCursor` to the current bookmark position.
 547                                                     bookmarksCursor.moveToPosition(i);
 548
 549                                                     // Update the display order only if it is not correct in the database.
 550                                                     if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
 551                                                         bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
 552                                                     }
 553                                                 }
 554                                         }
 555
 556                                         // Enable the delete bookmarks menu item.
 557                                         deleteBookmarksMenuItem.setEnabled(true);
 558
 559                                         // Reset the deleting bookmarks flag.
 560                                         deletingBookmarks = false;
 561
 562                                         // Close the activity if back has been pressed.
 563                                         if (closeActivityAfterDismissingSnackbar) {
 564                                             // Update the bookmarks folder for the bookmarks drawer in the main WebView activity.
 565                                             MainWebViewActivity.currentBookmarksFolder = currentFolder;
 566
 567                                             // Close the bookmarks drawer and reload the bookmarks ListView when returning to the main WebView activity.
 568                                             MainWebViewActivity.restartFromBookmarksActivity = true;
 569
 570                                             // Return to `MainWebViewActivity`.
 571                                             NavUtils.navigateUpFromSameTask(activity);
 572                                         }
 573                                     }
 574                                 });
 575
 576                         //Show the `SnackBar`.
 577                         bookmarksDeletedSnackbar.show();
 578
 579                         // Close the `ActionBar`.
 580                         mode.finish();
 581                         break;
 582
 583                     case R.id.context_menu_select_all_bookmarks:
 584                         // Get the total number of bookmarks.
 585                         int numberOfBookmarks = bookmarksListView.getCount();
 586
 587                         // Select them all.
 588                         for (int i = 0; i < numberOfBookmarks; i++) {
 589                             bookmarksListView.setItemChecked(i, true);
 590                         }
 591                         break;
 592                 }
 593
 594                 // Consume the click.
 595                 return true;
 596             }
 597
 598             @Override
 599             public void onDestroyActionMode(ActionMode mode) {
 600                 // Do nothing.
 601             }
 602         });
 603
 604         // Get handles for the `FloatingActionButtons`.
 605         FloatingActionButton createBookmarkFolderFab = findViewById(R.id.create_bookmark_folder_fab);
 606         FloatingActionButton createBookmarkFab = findViewById(R.id.create_bookmark_fab);
 607
 608         // Set the create new bookmark folder FAB to display the `AlertDialog`.
 609         createBookmarkFolderFab.setOnClickListener(v -> {
 610             // Show the `CreateBookmarkFolderDialog` `AlertDialog` and name the instance `@string/create_folder`.
 611             AppCompatDialogFragment createBookmarkFolderDialog = new CreateBookmarkFolderDialog();
 612             createBookmarkFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_folder));
 613         });
 614
 615         // Set the create new bookmark FAB to display the `AlertDialog`.
 616         createBookmarkFab.setOnClickListener(view -> {
 617             // Show the `CreateBookmarkDialog` `AlertDialog` and name the instance `@string/create_bookmark`.
 618             AppCompatDialogFragment createBookmarkDialog = new CreateBookmarkDialog();
 619             createBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_bookmark));
 620         });
 621     }
 622
 623     @Override
 624     public boolean onCreateOptionsMenu(Menu menu) {
 625         // Inflate the menu.
 626         getMenuInflater().inflate(R.menu.bookmarks_options_menu, menu);
 627
 628         // Success.
 629         return true;
 630     }
 631
 632     @Override
 633     public boolean onOptionsItemSelected(MenuItem menuItem) {
 634         // Get the ID of the menu item that was selected.
 635         int menuItemId = menuItem.getItemId();
 636
 637         switch (menuItemId) {
 638             case android.R.id.home:  // The home arrow is identified as `android.R.id.home`, not just `R.id.home`.
 639                 if (currentFolder.isEmpty()) {  // Currently in the home folder.
 640                     // Go home.
 641                     if ((bookmarksDeletedSnackbar != null) && bookmarksDeletedSnackbar.isShown()) {  // Close the bookmarks delete snackbar before going home.
 642                         // Set the close flag.
 643                         closeActivityAfterDismissingSnackbar = true;
 644
 645                         // Dismiss the snackbar.
 646                         bookmarksDeletedSnackbar.dismiss();
 647                     } else {  // Go home immediately.
 648                         // Update the bookmarks folder for the bookmarks drawer in `MainWebViewActivity`.
 649                         MainWebViewActivity.currentBookmarksFolder = "";
 650
 651                         // Close the bookmarks drawer and reload the bookmarks `ListView` when returning to `MainWebViewActivity`.
 652                         MainWebViewActivity.restartFromBookmarksActivity = true;
 653
 654                         // Return to `MainWebViewActivity`.
 655                         NavUtils.navigateUpFromSameTask(this);
 656                     }
 657                 } else {  // Currently in a subfolder.
 658                     // Place the former parent folder in `currentFolder`.
 659                     currentFolder = bookmarksDatabaseHelper.getParentFolder(currentFolder);
 660
 661                     // Load the new folder.
 662                     loadFolder();
 663                 }
 664                 break;
 665
 666             case R.id.options_menu_select_all_bookmarks:
 667                 // Get the total number of bookmarks.
 668                 int numberOfBookmarks = bookmarksListView.getCount();
 669
 670                 // Select them all.
 671                 for (int i = 0; i < numberOfBookmarks; i++) {
 672                     bookmarksListView.setItemChecked(i, true);
 673                 }
 674                 break;
 675
 676             case R.id.bookmarks_database_view:
 677                 // Launch `BookmarksDatabaseViewActivity`.
 678                 Intent bookmarksDatabaseViewIntent = new Intent(this, BookmarksDatabaseViewActivity.class);
 679                 startActivity(bookmarksDatabaseViewIntent);
 680                 break;
 681         }
 682         return true;
 683     }
 684
 685     @Override
 686     public void onBackPressed() {
 687         // Check to see if a snackbar is currently displayed.  If so, it must be closed before exiting so that a pending delete is completed before reloading the ListView in the bookmarks drawer.
 688         if ((bookmarksDeletedSnackbar != null) && bookmarksDeletedSnackbar.isShown()) {  // Close the bookmarks delete snackbar before going home.
 689             // Set the close flag.
 690             closeActivityAfterDismissingSnackbar = true;
 691
 692             // Dismiss the snackbar.
 693             bookmarksDeletedSnackbar.dismiss();
 694         } else {  // Go home immediately.
 695             // Update the bookmarks folder for the bookmarks drawer in the main WebView activity.
 696             MainWebViewActivity.currentBookmarksFolder = currentFolder;
 697
 698             // Close the bookmarks drawer and reload the bookmarks ListView when returning to the main WebView activity.
 699             MainWebViewActivity.restartFromBookmarksActivity = true;
 700
 701             // Exit `BookmarksActivity`.
 702             super.onBackPressed();
 703         }
 704     }
 705
 706     @Override
 707     public void onCreateBookmark(AppCompatDialogFragment dialogFragment) {
 708         // Get the `EditTexts` from the `dialogFragment`.
 709         EditText createBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
 710         EditText createBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
 711
 712         // Extract the strings from the `EditTexts`.
 713         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
 714         String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
 715
 716         // Convert the favoriteIcon Bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
 717         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 718         MainWebViewActivity.favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
 719         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 720
 721         // Display the new bookmark below the current items in the (0 indexed) list.
 722         int newBookmarkDisplayOrder = bookmarksListView.getCount();
 723
 724         // Create the bookmark.
 725         bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
 726
 727         // Update `bookmarksCursor` with the current contents of this folder.
 728         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
 729
 730         // Update the `ListView`.
 731         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 732
 733         // Scroll to the new bookmark.
 734         bookmarksListView.setSelection(newBookmarkDisplayOrder);
 735     }
 736
 737     @Override
 738     public void onCreateBookmarkFolder(AppCompatDialogFragment dialogFragment) {
 739         // Get handles for the views in `dialogFragment`.
 740         EditText createFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.create_folder_name_edittext);
 741         RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon_radiobutton);
 742         ImageView folderIconImageView = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon);
 743
 744         // Get new folder name string.
 745         String folderNameString = createFolderNameEditText.getText().toString();
 746
 747         // Get the new folder icon `Bitmap`.
 748         Bitmap folderIconBitmap;
 749         if (defaultFolderIconRadioButton.isChecked()) {  // Use the default folder icon.
 750             // Get the default folder icon and convert it to a `Bitmap`.
 751             Drawable folderIconDrawable = folderIconImageView.getDrawable();
 752             BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 753             folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 754         } else {  // Use the `WebView` favorite icon.
 755             folderIconBitmap = MainWebViewActivity.favoriteIconBitmap;
 756         }
 757
 758         // Convert `folderIconBitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
 759         ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 760         folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 761         byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 762
 763         // Move all the bookmarks down one in the display order.
 764         for (int i = 0; i < bookmarksListView.getCount(); i++) {
 765             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 766             bookmarksDatabaseHelper.updateDisplayOrder(databaseId, i + 1);
 767         }
 768
 769         // Create the folder, which will be placed at the top of the `ListView`.
 770         bookmarksDatabaseHelper.createFolder(folderNameString, currentFolder, folderIconByteArray);
 771
 772         // Update `bookmarksCursor` with the current contents of this folder.
 773         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
 774
 775         // Update the `ListView`.
 776         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 777
 778         // Scroll to the new folder.
 779         bookmarksListView.setSelection(0);
 780     }
 781
 782     @Override
 783     public void onSaveBookmark(AppCompatDialogFragment dialogFragment, int selectedBookmarkDatabaseId) {
 784         // Get handles for the views from `dialogFragment`.
 785         EditText editBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
 786         EditText editBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
 787         RadioButton currentBookmarkIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
 788
 789         // Store the bookmark strings.
 790         String bookmarkNameString = editBookmarkNameEditText.getText().toString();
 791         String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
 792
 793         // Update the bookmark.
 794         if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
 795             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
 796         } else {  // Update the bookmark using the `WebView` favorite icon.
 797             // Convert the favorite icon to a byte array.  `0` is for lossless compression (the only option for a PNG).
 798             ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 799             MainWebViewActivity.favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
 800             byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
 801
 802             //  Update the bookmark and the favorite icon.
 803             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
 804         }
 805
 806         // Close the contextual action mode.
 807         contextualActionMode.finish();
 808
 809         // Update `bookmarksCursor` with the contents of the current folder.
 810         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
 811
 812         // Update the `ListView`.
 813         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 814     }
 815
 816     @Override
 817     public void onSaveBookmarkFolder(AppCompatDialogFragment dialogFragment, int selectedFolderDatabaseId) {
 818         // Get handles for the views from `dialogFragment`.
 819         RadioButton currentFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
 820         RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
 821         ImageView defaultFolderIconImageView = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_imageview);
 822         EditText editFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
 823
 824         // Get the new folder name.
 825         String newFolderNameString = editFolderNameEditText.getText().toString();
 826
 827         // Check if the favorite icon has changed.
 828         if (currentFolderIconRadioButton.isChecked()) {  // Only the name has changed.
 829             // Update the name in the database.
 830             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
 831         } else if (!currentFolderIconRadioButton.isChecked() && newFolderNameString.equals(oldFolderNameString)) {  // Only the icon has changed.
 832             // Get the new folder icon `Bitmap`.
 833             Bitmap folderIconBitmap;
 834             if (defaultFolderIconRadioButton.isChecked()) {
 835                 // Get the default folder icon and convert it to a `Bitmap`.
 836                 Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
 837                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 838                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 839             } else {  // Use the `WebView` favorite icon.
 840                 folderIconBitmap = MainWebViewActivity.favoriteIconBitmap;
 841             }
 842
 843             // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
 844             ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 845             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 846             byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 847
 848             // Update the folder icon in the database.
 849             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, folderIconByteArray);
 850         } else {  // The folder icon and the name have changed.
 851             // Instantiate the new folder icon `Bitmap`.
 852             Bitmap folderIconBitmap;
 853
 854             // Populate the new folder icon bitmap.
 855             if (defaultFolderIconRadioButton.isChecked()) {
 856                 // Get the default folder icon and convert it to a `Bitmap`.
 857                 Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
 858                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 859                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 860             } else {  // Use the `WebView` favorite icon.
 861                 folderIconBitmap = MainWebViewActivity.favoriteIconBitmap;
 862             }
 863
 864             // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
 865             ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 866             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 867             byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 868
 869             // Update the folder name and icon in the database.
 870             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, folderIconByteArray);
 871         }
 872
 873         // Update `bookmarksCursor` with the current contents of this folder.
 874         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
 875
 876         // Update the `ListView`.
 877         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 878
 879         // Close the contextual action mode.
 880         contextualActionMode.finish();
 881     }
 882
 883     @Override
 884     public void onMoveToFolder(AppCompatDialogFragment dialogFragment) {
 885         // Get a handle for the `ListView` from `dialogFragment`.
 886         ListView folderListView = dialogFragment.getDialog().findViewById(R.id.move_to_folder_listview);
 887
 888         // Store a long array of the selected folders.
 889         long[] newFolderLongArray = folderListView.getCheckedItemIds();
 890
 891         // Get the new folder database ID.  Only one folder will be selected.
 892         int newFolderDatabaseId = (int) newFolderLongArray[0];
 893
 894         // Instantiate `newFolderName`.
 895         String newFolderName;
 896
 897         // Set the new folder name.
 898         if (newFolderDatabaseId == 0) {
 899             // The new folder is the home folder, represented as `""` in the database.
 900             newFolderName = "";
 901         } else {
 902             // Get the new folder name from the database.
 903             newFolderName = bookmarksDatabaseHelper.getFolderName(newFolderDatabaseId);
 904         }
 905
 906         // Get a long array with the the database ID of the selected bookmarks.
 907         long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 908
 909         // Move each of the selected bookmarks to the new folder.
 910         for (long databaseIdLong : selectedBookmarksLongArray) {
 911             // Get `databaseIdInt` for each selected bookmark.
 912             int databaseIdInt = (int) databaseIdLong;
 913
 914             // Move the selected bookmark to the new folder.
 915             bookmarksDatabaseHelper.moveToFolder(databaseIdInt, newFolderName);
 916         }
 917
 918         // Update `bookmarksCursor` with the current contents of this folder.
 919         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
 920
 921         // Update the `ListView`.
 922         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 923
 924         // Close the contextual app bar.
 925         contextualActionMode.finish();
 926     }
 927
 928     private void deleteBookmarkFolderContents(int databaseId) {
 929         // Get the name of the folder.
 930         String folderName = bookmarksDatabaseHelper.getFolderName(databaseId);
 931
 932         // Get the contents of the folder.
 933         Cursor folderCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(folderName);
 934
 935         // Delete each of the bookmarks in the folder.
 936         for (int i = 0; i < folderCursor.getCount(); i++) {
 937             // Move `folderCursor` to the current row.
 938             folderCursor.moveToPosition(i);
 939
 940             // Get the database ID of the item.
 941             int itemDatabaseId = folderCursor.getInt(folderCursor.getColumnIndex(BookmarksDatabaseHelper._ID));
 942
 943             // If this is a folder, recursively delete the contents first.
 944             if (bookmarksDatabaseHelper.isFolder(itemDatabaseId)) {
 945                 deleteBookmarkFolderContents(itemDatabaseId);
 946             }
 947
 948             // Delete the bookmark.
 949             bookmarksDatabaseHelper.deleteBookmark(itemDatabaseId);
 950         }
 951     }
 952
 953     private void updateMoveIcons() {
 954         // Get a long array of the selected bookmarks.
 955         long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 956
 957         // Get the database IDs for the first, last, and selected bookmarks.
 958         int selectedBookmarkDatabaseId = (int) selectedBookmarksLongArray[0];
 959         int firstBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(0);
 960         // bookmarksListView is 0 indexed.
 961         int lastBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(bookmarksListView.getCount() - 1);
 962
 963         // Update the move bookmark up `MenuItem`.
 964         if (selectedBookmarkDatabaseId == firstBookmarkDatabaseId) {  // The selected bookmark is in the first position.
 965             // Disable the move bookmark up `MenuItem`.
 966             moveBookmarkUpMenuItem.setEnabled(false);
 967
 968             //  Set the move bookmark up icon to be ghosted.
 969             moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_disabled);
 970         } else {  // The selected bookmark is not in the first position.
 971             // Enable the move bookmark up `MenuItem`.
 972             moveBookmarkUpMenuItem.setEnabled(true);
 973
 974             // Set the icon according to the theme.
 975             if (MainWebViewActivity.darkTheme) {
 976                 moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_enabled_dark);
 977             } else {
 978                 moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_enabled_light);
 979             }
 980         }
 981
 982         // Update the move bookmark down `MenuItem`.
 983         if (selectedBookmarkDatabaseId == lastBookmarkDatabaseId) {  // The selected bookmark is in the last position.
 984             // Disable the move bookmark down `MenuItem`.
 985             moveBookmarkDownMenuItem.setEnabled(false);
 986
 987             // Set the move bookmark down icon to be ghosted.
 988             moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_disabled);
 989         } else {  // The selected bookmark is not in the last position.
 990             // Enable the move bookmark down `MenuItem`.
 991             moveBookmarkDownMenuItem.setEnabled(true);
 992
 993             // Set the icon according to the theme.
 994             if (MainWebViewActivity.darkTheme) {
 995                 moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_enabled_dark);
 996             } else {
 997                 moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_enabled_light);
 998             }
 999         }
1000     }
1001
1002     private void scrollBookmarks(int selectedBookmarkPosition) {
1003         // Get the first and last visible bookmark positions.
1004         int firstVisibleBookmarkPosition = bookmarksListView.getFirstVisiblePosition();
1005         int lastVisibleBookmarkPosition = bookmarksListView.getLastVisiblePosition();
1006
1007         // Calculate the number of bookmarks per screen.
1008         int numberOfBookmarksPerScreen = lastVisibleBookmarkPosition - firstVisibleBookmarkPosition;
1009
1010         // Scroll with the moved bookmark if necessary.
1011         if (selectedBookmarkPosition <= firstVisibleBookmarkPosition) {  // The selected bookmark position is at or above the top of the screen.
1012             // Scroll to the selected bookmark position.
1013             bookmarksListView.setSelection(selectedBookmarkPosition);
1014         } else if (selectedBookmarkPosition >= (lastVisibleBookmarkPosition - 1)) {  // The selected bookmark is at or below the bottom of the screen.  The `-1` handles partial bookmarks displayed at the bottom of the `ListView`.
1015             // Scroll to display the selected bookmark at the bottom of the screen.  `+1` assured that the entire bookmark will be displayed in situations where only a partial bookmark fits at the bottom of the `ListView`.
1016             bookmarksListView.setSelection(selectedBookmarkPosition - numberOfBookmarksPerScreen + 1);
1017         }
1018     }
1019
1020     private void loadFolder() {
1021         // Update `bookmarksCursor` with the contents of the bookmarks database for the current folder.
1022         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
1023
1024         // Setup a `CursorAdapter`.  `this` specifies the `Context`.  `false` disables `autoRequery`.
1025         bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
1026             @Override
1027             public View newView(Context context, Cursor cursor, ViewGroup parent) {
1028                 // Inflate the individual item layout.  `false` does not attach it to the root.
1029                 return getLayoutInflater().inflate(R.layout.bookmarks_activity_item_linearlayout, parent, false);
1030             }
1031
1032             @Override
1033             public void bindView(View view, Context context, Cursor cursor) {
1034                 // Get handles for the views.
1035                 ImageView bookmarkFavoriteIcon = view.findViewById(R.id.bookmark_favorite_icon);
1036                 TextView bookmarkNameTextView = view.findViewById(R.id.bookmark_name);
1037
1038                 // Get the favorite icon byte array from the `Cursor`.
1039                 byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
1040
1041                 // Convert the byte array to a `Bitmap` beginning at the first byte and ending at the last.
1042                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
1043
1044                 // Display the bitmap in `bookmarkFavoriteIcon`.
1045                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
1046
1047                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
1048                 String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
1049                 bookmarkNameTextView.setText(bookmarkNameString);
1050
1051                 // Make the font bold for folders.
1052                 if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
1053                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT_BOLD);
1054                 } else {  // Reset the font to default for normal bookmarks.
1055                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
1056                 }
1057             }
1058         };
1059
1060         // Populate the `ListView` with the adapter.
1061         bookmarksListView.setAdapter(bookmarksCursorAdapter);
1062
1063         // Set the `AppBar` title.
1064         if (currentFolder.isEmpty()) {
1065             appBar.setTitle(R.string.bookmarks);
1066         } else {
1067             appBar.setTitle(currentFolder);
1068         }
1069     }
1070
1071     @Override
1072     public void onDestroy() {
1073         // Close the bookmarks cursor and database.
1074         bookmarksCursor.close();
1075         bookmarksDatabaseHelper.close();
1076
1077         // Run the default commands.
1078         super.onDestroy();
1079     }
1080 }