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         // Handle long presses on the list view.
 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.
 217                 getMenuInflater().inflate(R.menu.bookmarks_context_menu, menu);
 218
 219                 // Set the title.
 220                 if (currentFolder.isEmpty()) {  // Use `R.string.bookmarks` if in the home folder.
 221                     mode.setTitle(R.string.bookmarks);
 222                 } else {  // Use the current folder name as the title.
 223                     mode.setTitle(currentFolder);
 224                 }
 225
 226                 // Get handles for menu items that need to be selectively disabled.
 227                 moveBookmarkUpMenuItem = menu.findItem(R.id.move_bookmark_up);
 228                 moveBookmarkDownMenuItem = menu.findItem(R.id.move_bookmark_down);
 229                 editBookmarkMenuItem = menu.findItem(R.id.edit_bookmark);
 230                 deleteBookmarksMenuItem = menu.findItem(R.id.delete_bookmark);
 231                 selectAllBookmarksMenuItem = menu.findItem(R.id.context_menu_select_all_bookmarks);
 232
 233                 // Disable the delete bookmarks menu item if a delete is pending.
 234                 deleteBookmarksMenuItem.setEnabled(!deletingBookmarks);
 235
 236                 // Store a handle for the contextual action mode so it can be closed programatically.
 237                 contextualActionMode = mode;
 238
 239                 // Make it so.
 240                 return true;
 241             }
 242
 243             @Override
 244             public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
 245                 // Get a handle for the move to folder menu item.
 246                 MenuItem moveToFolderMenuItem = menu.findItem(R.id.move_to_folder);
 247
 248                 // Get a Cursor with all of the folders.
 249                 Cursor folderCursor = bookmarksDatabaseHelper.getAllFolders();
 250
 251                 // Enable the move to folder menu item if at least one folder exists.
 252                 moveToFolderMenuItem.setVisible(folderCursor.getCount() > 0);
 253
 254                 // Make it so.
 255                 return true;
 256             }
 257
 258             @Override
 259             public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
 260                 // Get the number of selected bookmarks.
 261                 int numberOfSelectedBookmarks = bookmarksListView.getCheckedItemCount();
 262
 263                 // Adjust the ActionMode and the menu according to the number of selected bookmarks.
 264                 if (numberOfSelectedBookmarks == 1) {  // One bookmark is selected.
 265                     // List the number of selected bookmarks in the subtitle.
 266                     mode.setSubtitle(getString(R.string.selected) + "  1");
 267
 268                     // Show the `Move Up`, `Move Down`, and  `Edit` options.
 269                     moveBookmarkUpMenuItem.setVisible(true);
 270                     moveBookmarkDownMenuItem.setVisible(true);
 271                     editBookmarkMenuItem.setVisible(true);
 272
 273                     // Update the enabled status of the move icons.
 274                     updateMoveIcons();
 275                 } else {  // More than one bookmark is selected.
 276                     // List the number of selected bookmarks in the subtitle.
 277                     mode.setSubtitle(getString(R.string.selected) + "  " + numberOfSelectedBookmarks);
 278
 279                     // Hide non-applicable `MenuItems`.
 280                     moveBookmarkUpMenuItem.setVisible(false);
 281                     moveBookmarkDownMenuItem.setVisible(false);
 282                     editBookmarkMenuItem.setVisible(false);
 283                 }
 284
 285                 // Do not show the select all menu item if all the bookmarks are already checked.
 286                 if (bookmarksListView.getCheckedItemCount() == bookmarksListView.getCount()) {
 287                     selectAllBookmarksMenuItem.setVisible(false);
 288                 } else {
 289                     selectAllBookmarksMenuItem.setVisible(true);
 290                 }
 291             }
 292
 293             @Override
 294             public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
 295                 // Instantiate the common variables.
 296                 int selectedBookmarkPosition;
 297                 int selectedBookmarkNewPosition;
 298                 final SparseBooleanArray selectedBookmarksPositionsSparseBooleanArray;
 299
 300                 switch (item.getItemId()) {
 301                     case R.id.move_bookmark_up:
 302                         // Get the array of checked bookmark positions.
 303                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 304
 305                         // Store the position of the selected bookmark.  Only one bookmark is selected when `move_bookmark_up` is enabled.
 306                         selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(0);
 307
 308                         // Calculate the new position of the selected bookmark.
 309                         selectedBookmarkNewPosition = selectedBookmarkPosition - 1;
 310
 311                         // Iterate through the bookmarks.
 312                         for (int i = 0; i < bookmarksListView.getCount(); i++) {
 313                             // Get the database ID for the current bookmark.
 314                             int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 315
 316                             // Update the display order for the current bookmark.
 317                             if (i == selectedBookmarkPosition) {  // The current bookmark is the selected bookmark.
 318                                 // Move the current bookmark up one.
 319                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i - 1);
 320                             } else if ((i + 1) == selectedBookmarkPosition){  // The current bookmark is immediately above the selected bookmark.
 321                                 // Move the current bookmark down one.
 322                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i + 1);
 323                             } else {  // The current bookmark is not changing positions.
 324                                 // Move `bookmarksCursor` to the current bookmark position.
 325                                 bookmarksCursor.moveToPosition(i);
 326
 327                                 // Update the display order only if it is not correct in the database.
 328                                 if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
 329                                     bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
 330                                 }
 331                             }
 332                         }
 333
 334                         // Update the bookmarks cursor with the current contents of the bookmarks database.
 335                         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 336
 337                         // Update the `ListView`.
 338                         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 339
 340                         // Scroll with the bookmark.
 341                         scrollBookmarks(selectedBookmarkNewPosition);
 342
 343                         // Update the enabled status of the move icons.
 344                         updateMoveIcons();
 345                         break;
 346
 347                     case R.id.move_bookmark_down:
 348                         // Get the array of checked bookmark positions.
 349                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 350
 351                         // Store the position of the selected bookmark.  Only one bookmark is selected when `move_bookmark_down` is enabled.
 352                         selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(0);
 353
 354                         // Calculate the new position of the selected bookmark.
 355                         selectedBookmarkNewPosition = selectedBookmarkPosition + 1;
 356
 357                         // Iterate through the bookmarks.
 358                         for (int i = 0; i <bookmarksListView.getCount(); i++) {
 359                             // Get the database ID for the current bookmark.
 360                             int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 361
 362                             // Update the display order for the current bookmark.
 363                             if (i == selectedBookmarkPosition) {  // The current bookmark is the selected bookmark.
 364                                 // Move the current bookmark down one.
 365                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i + 1);
 366                             } else if ((i - 1) == selectedBookmarkPosition) {  // The current bookmark is immediately below the selected bookmark.
 367                                 // Move the bookmark below the selected bookmark up one.
 368                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i - 1);
 369                             } else {  // The current bookmark is not changing positions.
 370                                 // Move `bookmarksCursor` to the current bookmark position.
 371                                 bookmarksCursor.moveToPosition(i);
 372
 373                                 // Update the display order only if it is not correct in the database.
 374                                 if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
 375                                     bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
 376                                 }
 377                             }
 378                         }
 379
 380                         // Update the bookmarks cursor with the current contents of the bookmarks database.
 381                         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 382
 383                         // Update the `ListView`.
 384                         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 385
 386                         // Scroll with the bookmark.
 387                         scrollBookmarks(selectedBookmarkNewPosition);
 388
 389                         // Update the enabled status of the move icons.
 390                         updateMoveIcons();
 391                         break;
 392
 393                     case R.id.move_to_folder:
 394                         // Store `checkedItemIds` for use by the `AlertDialog`.
 395                         checkedItemIds = bookmarksListView.getCheckedItemIds();
 396
 397                         // Show the `MoveToFolderDialog` `AlertDialog` and name the instance `@string/move_to_folder
 398                         AppCompatDialogFragment moveToFolderDialog = new MoveToFolderDialog();
 399                         moveToFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.move_to_folder));
 400                         break;
 401
 402                     case R.id.edit_bookmark:
 403                         // Get the array of checked bookmark positions.
 404                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 405
 406                         // Get the position of the selected bookmark.  Only one bookmark is selected when `edit_bookmark_down` is enabled.
 407                         selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(0);
 408
 409                         // Move the `Cursor` to the selected position and find out if it is a folder.
 410                         bookmarksCursor.moveToPosition(selectedBookmarkPosition);
 411                         boolean isFolder = (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1);
 412
 413                         // Get the selected bookmark database ID.
 414                         int databaseId = bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper._ID));
 415
 416                         // Show the edit bookmark or edit bookmark folder dialog.
 417                         if (isFolder) {
 418                             // Save the current folder name, which is used in `onSaveBookmarkFolder()`.
 419                             oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 420
 421                             // Show the edit bookmark folder dialog.
 422                             AppCompatDialogFragment editFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId);
 423                             editFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_folder));
 424                         } else {
 425                             // Show the edit bookmark dialog.
 426                             AppCompatDialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId);
 427                             editBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_bookmark));
 428                         }
 429                         break;
 430
 431                     case R.id.delete_bookmark:
 432                         // Set the deleting bookmarks flag, which prevents the delete menu item from being enabled until the current process finishes.
 433                         deletingBookmarks = true;
 434
 435                         // Get an array of the selected row IDs.
 436                         final long[] selectedBookmarksIdsLongArray = bookmarksListView.getCheckedItemIds();
 437
 438                         // 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.
 439                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions().clone();
 440
 441                         // Update the bookmarks cursor with the current contents of the bookmarks database except for the specified database IDs.
 442                         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrderExcept(selectedBookmarksIdsLongArray, currentFolder);
 443
 444                         // Update the list view.
 445                         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 446
 447                         // Show a Snackbar with the number of deleted bookmarks.
 448                         bookmarksDeletedSnackbar = Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), getString(R.string.bookmarks_deleted) + "  " + selectedBookmarksIdsLongArray.length,
 449                                 Snackbar.LENGTH_LONG)
 450                                 .setAction(R.string.undo, view -> {
 451                                     // Do nothing because everything will be handled by `onDismissed()` below.
 452                                 })
 453                                 .addCallback(new Snackbar.Callback() {
 454                                     @Override
 455                                     public void onDismissed(Snackbar snackbar, int event) {
 456                                         switch (event) {
 457                                             // The user pushed the `Undo` button.
 458                                             case Snackbar.Callback.DISMISS_EVENT_ACTION:
 459                                                 // Update the bookmarks cursor with the current contents of the bookmarks database, including the "deleted" bookmarks.
 460                                                 bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 461
 462                                                 // Update the list view.
 463                                                 bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 464
 465                                                 // Re-select the previously selected bookmarks.
 466                                                 for (int i = 0; i < selectedBookmarksPositionsSparseBooleanArray.size(); i++) {
 467                                                     bookmarksListView.setItemChecked(selectedBookmarksPositionsSparseBooleanArray.keyAt(i), true);
 468                                                 }
 469                                                 break;
 470
 471                                             // The Snackbar was dismissed without the `Undo` button being pushed.
 472                                             default:
 473                                                 // Delete each selected bookmark.
 474                                                 for (long databaseIdLong : selectedBookmarksIdsLongArray) {
 475                                                     // Convert `databaseIdLong` to an int.
 476                                                     int databaseIdInt = (int) databaseIdLong;
 477
 478                                                     // Delete the contents of the folder if the selected bookmark is a folder.
 479                                                     if (bookmarksDatabaseHelper.isFolder(databaseIdInt)) {
 480                                                         deleteBookmarkFolderContents(databaseIdInt);
 481                                                     }
 482
 483                                                     // Delete the selected bookmark.
 484                                                     bookmarksDatabaseHelper.deleteBookmark(databaseIdInt);
 485                                                 }
 486
 487                                                 // Update the display order.
 488                                                 for (int i = 0; i < bookmarksListView.getCount(); i++) {
 489                                                     // Get the database ID for the current bookmark.
 490                                                     int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 491
 492                                                     // Move `bookmarksCursor` to the current bookmark position.
 493                                                     bookmarksCursor.moveToPosition(i);
 494
 495                                                     // Update the display order only if it is not correct in the database.
 496                                                     if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
 497                                                         bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
 498                                                     }
 499                                                 }
 500                                         }
 501
 502                                         // Reset the deleting bookmarks flag.
 503                                         deletingBookmarks = false;
 504
 505                                         // Enable the delete bookmarks menu item.
 506                                         deleteBookmarksMenuItem.setEnabled(true);
 507
 508                                         // Close the activity if back has been pressed.
 509                                         if (closeActivityAfterDismissingSnackbar) {
 510                                             onBackPressed();
 511                                         }
 512                                     }
 513                                 });
 514
 515                         //Show the Snackbar.
 516                         bookmarksDeletedSnackbar.show();
 517                         break;
 518
 519                     case R.id.context_menu_select_all_bookmarks:
 520                         // Get the total number of bookmarks.
 521                         int numberOfBookmarks = bookmarksListView.getCount();
 522
 523                         // Select them all.
 524                         for (int i = 0; i < numberOfBookmarks; i++) {
 525                             bookmarksListView.setItemChecked(i, true);
 526                         }
 527                         break;
 528                 }
 529
 530                 // Consume the click.
 531                 return true;
 532             }
 533
 534             @Override
 535             public void onDestroyActionMode(ActionMode mode) {
 536                 // Do nothing.
 537             }
 538         });
 539
 540         // Get handles for the `FloatingActionButtons`.
 541         FloatingActionButton createBookmarkFolderFab = findViewById(R.id.create_bookmark_folder_fab);
 542         FloatingActionButton createBookmarkFab = findViewById(R.id.create_bookmark_fab);
 543
 544         // Set the create new bookmark folder FAB to display the `AlertDialog`.
 545         createBookmarkFolderFab.setOnClickListener(v -> {
 546             // Show the `CreateBookmarkFolderDialog` `AlertDialog` and name the instance `@string/create_folder`.
 547             AppCompatDialogFragment createBookmarkFolderDialog = new CreateBookmarkFolderDialog();
 548             createBookmarkFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_folder));
 549         });
 550
 551         // Set the create new bookmark FAB to display the `AlertDialog`.
 552         createBookmarkFab.setOnClickListener(view -> {
 553             // Show the `CreateBookmarkDialog` `AlertDialog` and name the instance `@string/create_bookmark`.
 554             AppCompatDialogFragment createBookmarkDialog = new CreateBookmarkDialog();
 555             createBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_bookmark));
 556         });
 557     }
 558
 559     @Override
 560     public void onRestart() {
 561         // Run the default commands.
 562         super.onRestart();
 563
 564         // Update the list view if returning from the bookmarks database view activity.
 565         if (restartFromBookmarksDatabaseViewActivity) {
 566             // Load the current folder in the list view.
 567             loadFolder();
 568
 569             // Reset `restartFromBookmarksDatabaseViewActivity`.
 570             restartFromBookmarksDatabaseViewActivity = false;
 571         }
 572     }
 573
 574     @Override
 575     public boolean onCreateOptionsMenu(Menu menu) {
 576         // Inflate the menu.
 577         getMenuInflater().inflate(R.menu.bookmarks_options_menu, menu);
 578
 579         // Success.
 580         return true;
 581     }
 582
 583     @Override
 584     public boolean onOptionsItemSelected(MenuItem menuItem) {
 585         switch (menuItem.getItemId()) {
 586             case android.R.id.home:  // The home arrow is identified as `android.R.id.home`, not just `R.id.home`.
 587                 if (currentFolder.isEmpty()) {  // Currently in the home folder.
 588                     // Run the back commands.
 589                     onBackPressed();
 590                 } else {  // Currently in a subfolder.
 591                     // Place the former parent folder in `currentFolder`.
 592                     currentFolder = bookmarksDatabaseHelper.getParentFolderName(currentFolder);
 593
 594                     // Load the new folder.
 595                     loadFolder();
 596                 }
 597                 break;
 598
 599             case R.id.options_menu_select_all_bookmarks:
 600                 // Get the total number of bookmarks.
 601                 int numberOfBookmarks = bookmarksListView.getCount();
 602
 603                 // Select them all.
 604                 for (int i = 0; i < numberOfBookmarks; i++) {
 605                     bookmarksListView.setItemChecked(i, true);
 606                 }
 607                 break;
 608
 609             case R.id.bookmarks_database_view:
 610                 // Launch `BookmarksDatabaseViewActivity`.
 611                 Intent bookmarksDatabaseViewIntent = new Intent(this, BookmarksDatabaseViewActivity.class);
 612                 startActivity(bookmarksDatabaseViewIntent);
 613                 break;
 614         }
 615         return true;
 616     }
 617
 618     @Override
 619     public void onBackPressed() {
 620         // 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.
 621         if ((bookmarksDeletedSnackbar != null) && bookmarksDeletedSnackbar.isShown()) {  // Close the bookmarks deleted snackbar before going home.
 622             // Set the close flag.
 623             closeActivityAfterDismissingSnackbar = true;
 624
 625             // Dismiss the snackbar.
 626             bookmarksDeletedSnackbar.dismiss();
 627         } else {  // Go home immediately.
 628             // Update the bookmarks folder for the bookmarks drawer in the main WebView activity.
 629             MainWebViewActivity.currentBookmarksFolder = currentFolder;
 630
 631             // Close the bookmarks drawer and reload the bookmarks ListView when returning to the main WebView activity.
 632             MainWebViewActivity.restartFromBookmarksActivity = true;
 633
 634             // Exit the bookmarks activity.
 635             super.onBackPressed();
 636         }
 637     }
 638
 639     @Override
 640     public void onCreateBookmark(AppCompatDialogFragment dialogFragment) {
 641         // Get the `EditTexts` from the `dialogFragment`.
 642         EditText createBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
 643         EditText createBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
 644
 645         // Extract the strings from the `EditTexts`.
 646         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
 647         String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
 648
 649         // Convert the favoriteIcon Bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
 650         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 651         MainWebViewActivity.favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
 652         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 653
 654         // Display the new bookmark below the current items in the (0 indexed) list.
 655         int newBookmarkDisplayOrder = bookmarksListView.getCount();
 656
 657         // Create the bookmark.
 658         bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
 659
 660         // Update the bookmarks cursor with the current contents of this folder.
 661         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 662
 663         // Update the `ListView`.
 664         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 665
 666         // Scroll to the new bookmark.
 667         bookmarksListView.setSelection(newBookmarkDisplayOrder);
 668     }
 669
 670     @Override
 671     public void onCreateBookmarkFolder(AppCompatDialogFragment dialogFragment) {
 672         // Get handles for the views in `dialogFragment`.
 673         EditText createFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.create_folder_name_edittext);
 674         RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon_radiobutton);
 675         ImageView folderIconImageView = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon);
 676
 677         // Get new folder name string.
 678         String folderNameString = createFolderNameEditText.getText().toString();
 679
 680         // Get the new folder icon bitmap.
 681         Bitmap folderIconBitmap;
 682         if (defaultFolderIconRadioButton.isChecked()) {  // Use the default folder icon.
 683             // Get the default folder icon and convert it to a bitmap.
 684             Drawable folderIconDrawable = folderIconImageView.getDrawable();
 685             BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 686             folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 687         } else {  // Use the `WebView` favorite icon.
 688             folderIconBitmap = MainWebViewActivity.favoriteIconBitmap;
 689         }
 690
 691         // Convert `folderIconBitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
 692         ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 693         folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 694         byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 695
 696         // Move all the bookmarks down one in the display order.
 697         for (int i = 0; i < bookmarksListView.getCount(); i++) {
 698             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 699             bookmarksDatabaseHelper.updateDisplayOrder(databaseId, i + 1);
 700         }
 701
 702         // Create the folder, which will be placed at the top of the `ListView`.
 703         bookmarksDatabaseHelper.createFolder(folderNameString, currentFolder, folderIconByteArray);
 704
 705         // Update the bookmarks cursor with the current contents of this folder.
 706         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 707
 708         // Update the `ListView`.
 709         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 710
 711         // Scroll to the new folder.
 712         bookmarksListView.setSelection(0);
 713     }
 714
 715     @Override
 716     public void onSaveBookmark(AppCompatDialogFragment dialogFragment, int selectedBookmarkDatabaseId) {
 717         // Get handles for the views from `dialogFragment`.
 718         EditText editBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
 719         EditText editBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
 720         RadioButton currentBookmarkIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
 721
 722         // Store the bookmark strings.
 723         String bookmarkNameString = editBookmarkNameEditText.getText().toString();
 724         String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
 725
 726         // Update the bookmark.
 727         if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
 728             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
 729         } else {  // Update the bookmark using the `WebView` favorite icon.
 730             // Convert the favorite icon to a byte array.  `0` is for lossless compression (the only option for a PNG).
 731             ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 732             MainWebViewActivity.favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
 733             byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
 734
 735             //  Update the bookmark and the favorite icon.
 736             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
 737         }
 738
 739         // Close the contextual action mode.
 740         contextualActionMode.finish();
 741
 742         // Update the bookmarks cursor with the contents of the current folder.
 743         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 744
 745         // Update the `ListView`.
 746         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 747     }
 748
 749     @Override
 750     public void onSaveBookmarkFolder(AppCompatDialogFragment dialogFragment, int selectedFolderDatabaseId) {
 751         // Get handles for the views from `dialogFragment`.
 752         RadioButton currentFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
 753         RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
 754         ImageView defaultFolderIconImageView = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_imageview);
 755         EditText editFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
 756
 757         // Get the new folder name.
 758         String newFolderNameString = editFolderNameEditText.getText().toString();
 759
 760         // Check if the favorite icon has changed.
 761         if (currentFolderIconRadioButton.isChecked()) {  // Only the name has changed.
 762             // Update the name in the database.
 763             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
 764         } else if (!currentFolderIconRadioButton.isChecked() && newFolderNameString.equals(oldFolderNameString)) {  // Only the icon has changed.
 765             // Get the new folder icon `Bitmap`.
 766             Bitmap folderIconBitmap;
 767             if (defaultFolderIconRadioButton.isChecked()) {
 768                 // Get the default folder icon and convert it to a `Bitmap`.
 769                 Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
 770                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 771                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 772             } else {  // Use the `WebView` favorite icon.
 773                 folderIconBitmap = MainWebViewActivity.favoriteIconBitmap;
 774             }
 775
 776             // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
 777             ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 778             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 779             byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 780
 781             // Update the folder icon in the database.
 782             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, folderIconByteArray);
 783         } else {  // The folder icon and the name have changed.
 784             // Instantiate the new folder icon `Bitmap`.
 785             Bitmap folderIconBitmap;
 786
 787             // Populate the new folder icon bitmap.
 788             if (defaultFolderIconRadioButton.isChecked()) {
 789                 // Get the default folder icon and convert it to a `Bitmap`.
 790                 Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
 791                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 792                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 793             } else {  // Use the `WebView` favorite icon.
 794                 folderIconBitmap = MainWebViewActivity.favoriteIconBitmap;
 795             }
 796
 797             // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
 798             ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 799             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 800             byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 801
 802             // Update the folder name and icon in the database.
 803             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, folderIconByteArray);
 804         }
 805
 806         // Update the bookmarks cursor with the current contents of this folder.
 807         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 808
 809         // Update the `ListView`.
 810         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 811
 812         // Close the contextual action mode.
 813         contextualActionMode.finish();
 814     }
 815
 816     @Override
 817     public void onMoveToFolder(AppCompatDialogFragment dialogFragment) {
 818         // Get a handle for the `ListView` from `dialogFragment`.
 819         ListView folderListView = dialogFragment.getDialog().findViewById(R.id.move_to_folder_listview);
 820
 821         // Store a long array of the selected folders.
 822         long[] newFolderLongArray = folderListView.getCheckedItemIds();
 823
 824         // Get the new folder database ID.  Only one folder will be selected.
 825         int newFolderDatabaseId = (int) newFolderLongArray[0];
 826
 827         // Instantiate `newFolderName`.
 828         String newFolderName;
 829
 830         // Set the new folder name.
 831         if (newFolderDatabaseId == 0) {
 832             // The new folder is the home folder, represented as `""` in the database.
 833             newFolderName = "";
 834         } else {
 835             // Get the new folder name from the database.
 836             newFolderName = bookmarksDatabaseHelper.getFolderName(newFolderDatabaseId);
 837         }
 838
 839         // Get a long array with the the database ID of the selected bookmarks.
 840         long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 841
 842         // Move each of the selected bookmarks to the new folder.
 843         for (long databaseIdLong : selectedBookmarksLongArray) {
 844             // Get `databaseIdInt` for each selected bookmark.
 845             int databaseIdInt = (int) databaseIdLong;
 846
 847             // Move the selected bookmark to the new folder.
 848             bookmarksDatabaseHelper.moveToFolder(databaseIdInt, newFolderName);
 849         }
 850
 851         // Update the bookmarks cursor with the current contents of this folder.
 852         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 853
 854         // Update the `ListView`.
 855         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 856
 857         // Close the contextual app bar.
 858         contextualActionMode.finish();
 859     }
 860
 861     private void deleteBookmarkFolderContents(int databaseId) {
 862         // Get the name of the folder.
 863         String folderName = bookmarksDatabaseHelper.getFolderName(databaseId);
 864
 865         // Get the contents of the folder.
 866         Cursor folderCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(folderName);
 867
 868         // Delete each of the bookmarks in the folder.
 869         for (int i = 0; i < folderCursor.getCount(); i++) {
 870             // Move `folderCursor` to the current row.
 871             folderCursor.moveToPosition(i);
 872
 873             // Get the database ID of the item.
 874             int itemDatabaseId = folderCursor.getInt(folderCursor.getColumnIndex(BookmarksDatabaseHelper._ID));
 875
 876             // If this is a folder, recursively delete the contents first.
 877             if (bookmarksDatabaseHelper.isFolder(itemDatabaseId)) {
 878                 deleteBookmarkFolderContents(itemDatabaseId);
 879             }
 880
 881             // Delete the bookmark.
 882             bookmarksDatabaseHelper.deleteBookmark(itemDatabaseId);
 883         }
 884     }
 885
 886     private void updateMoveIcons() {
 887         // Get a long array of the selected bookmarks.
 888         long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 889
 890         // Get the database IDs for the first, last, and selected bookmarks.
 891         int selectedBookmarkDatabaseId = (int) selectedBookmarksLongArray[0];
 892         int firstBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(0);
 893         // bookmarksListView is 0 indexed.
 894         int lastBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(bookmarksListView.getCount() - 1);
 895
 896         // Update the move bookmark up `MenuItem`.
 897         if (selectedBookmarkDatabaseId == firstBookmarkDatabaseId) {  // The selected bookmark is in the first position.
 898             // Disable the move bookmark up `MenuItem`.
 899             moveBookmarkUpMenuItem.setEnabled(false);
 900
 901             //  Set the move bookmark up icon to be ghosted.
 902             moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_disabled);
 903         } else {  // The selected bookmark is not in the first position.
 904             // Enable the move bookmark up `MenuItem`.
 905             moveBookmarkUpMenuItem.setEnabled(true);
 906
 907             // Set the icon according to the theme.
 908             if (MainWebViewActivity.darkTheme) {
 909                 moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_enabled_dark);
 910             } else {
 911                 moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_enabled_light);
 912             }
 913         }
 914
 915         // Update the move bookmark down `MenuItem`.
 916         if (selectedBookmarkDatabaseId == lastBookmarkDatabaseId) {  // The selected bookmark is in the last position.
 917             // Disable the move bookmark down `MenuItem`.
 918             moveBookmarkDownMenuItem.setEnabled(false);
 919
 920             // Set the move bookmark down icon to be ghosted.
 921             moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_disabled);
 922         } else {  // The selected bookmark is not in the last position.
 923             // Enable the move bookmark down `MenuItem`.
 924             moveBookmarkDownMenuItem.setEnabled(true);
 925
 926             // Set the icon according to the theme.
 927             if (MainWebViewActivity.darkTheme) {
 928                 moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_enabled_dark);
 929             } else {
 930                 moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_enabled_light);
 931             }
 932         }
 933     }
 934
 935     private void scrollBookmarks(int selectedBookmarkPosition) {
 936         // Get the first and last visible bookmark positions.
 937         int firstVisibleBookmarkPosition = bookmarksListView.getFirstVisiblePosition();
 938         int lastVisibleBookmarkPosition = bookmarksListView.getLastVisiblePosition();
 939
 940         // Calculate the number of bookmarks per screen.
 941         int numberOfBookmarksPerScreen = lastVisibleBookmarkPosition - firstVisibleBookmarkPosition;
 942
 943         // Scroll with the moved bookmark if necessary.
 944         if (selectedBookmarkPosition <= firstVisibleBookmarkPosition) {  // The selected bookmark position is at or above the top of the screen.
 945             // Scroll to the selected bookmark position.
 946             bookmarksListView.setSelection(selectedBookmarkPosition);
 947         } else if (selectedBookmarkPosition >= (lastVisibleBookmarkPosition - 1)) {  // The selected bookmark is at or below the bottom of the screen.
 948             // 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.
 949             // `+1` assures that the entire bookmark will be displayed in situations where only a partial bookmark fits at the bottom of the list view.
 950             bookmarksListView.setSelection(selectedBookmarkPosition - numberOfBookmarksPerScreen + 1);
 951         }
 952     }
 953
 954     private void loadFolder() {
 955         // Update bookmarks cursor with the contents of the bookmarks database for the current folder.
 956         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 957
 958         // Setup a `CursorAdapter`.  `this` specifies the `Context`.  `false` disables `autoRequery`.
 959         bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
 960             @Override
 961             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 962                 // Inflate the individual item layout.  `false` does not attach it to the root.
 963                 return getLayoutInflater().inflate(R.layout.bookmarks_activity_item_linearlayout, parent, false);
 964             }
 965
 966             @Override
 967             public void bindView(View view, Context context, Cursor cursor) {
 968                 // Get handles for the views.
 969                 ImageView bookmarkFavoriteIcon = view.findViewById(R.id.bookmark_favorite_icon);
 970                 TextView bookmarkNameTextView = view.findViewById(R.id.bookmark_name);
 971
 972                 // Get the favorite icon byte array from the `Cursor`.
 973                 byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
 974
 975                 // Convert the byte array to a `Bitmap` beginning at the first byte and ending at the last.
 976                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
 977
 978                 // Display the bitmap in `bookmarkFavoriteIcon`.
 979                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
 980
 981                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
 982                 String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 983                 bookmarkNameTextView.setText(bookmarkNameString);
 984
 985                 // Make the font bold for folders.
 986                 if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
 987                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT_BOLD);
 988                 } else {  // Reset the font to default for normal bookmarks.
 989                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
 990                 }
 991             }
 992         };
 993
 994         // Populate the list view with the adapter.
 995         bookmarksListView.setAdapter(bookmarksCursorAdapter);
 996
 997         // Set the `AppBar` title.
 998         if (currentFolder.isEmpty()) {
 999             appBar.setTitle(R.string.bookmarks);
1000         } else {
1001             appBar.setTitle(currentFolder);
1002         }
1003     }
1004
1005     @Override
1006     public void onDestroy() {
1007         // Close the bookmarks cursor and database.
1008         bookmarksCursor.close();
1009         bookmarksDatabaseHelper.close();
1010
1011         // Run the default commands.
1012         super.onDestroy();
1013     }
1014 }