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