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

   1 /*
   2  * Copyright © 2016-2018 Soren Stoutner <soren@stoutner.com>.
   3  *
   4  * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
   5  *
   6  * Privacy Browser is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Privacy Browser is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 package com.stoutner.privacybrowser.activities;
  21
  22 import android.app.Activity;
  23 import android.content.Context;
  24 import android.content.Intent;
  25 import android.database.Cursor;
  26 import android.graphics.Bitmap;
  27 import android.graphics.BitmapFactory;
  28 import android.graphics.Typeface;
  29 import android.graphics.drawable.BitmapDrawable;
  30 import android.graphics.drawable.Drawable;
  31 import android.os.Bundle;
  32 import android.support.design.widget.FloatingActionButton;
  33 import android.support.design.widget.Snackbar;
  34 import android.support.v4.app.NavUtils;
  35 import android.support.v7.app.ActionBar;
  36 import android.support.v7.app.AppCompatActivity;
  37 // `AppCompatDialogFragment` is required instead of `DialogFragment` or an error is produced on API <=22.
  38 import android.support.v7.app.AppCompatDialogFragment;
  39 import android.support.v7.widget.Toolbar;
  40 import android.util.SparseBooleanArray;
  41 import android.view.ActionMode;
  42 import android.view.Menu;
  43 import android.view.MenuItem;
  44 import android.view.View;
  45 import android.view.ViewGroup;
  46 import android.view.WindowManager;
  47 import android.widget.AbsListView;
  48 import android.widget.CursorAdapter;
  49 import android.widget.EditText;
  50 import android.widget.ImageView;
  51 import android.widget.ListView;
  52 import android.widget.RadioButton;
  53 import android.widget.TextView;
  54
  55 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
  56 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
  57 import com.stoutner.privacybrowser.dialogs.EditBookmarkDialog;
  58 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
  59 import com.stoutner.privacybrowser.dialogs.MoveToFolderDialog;
  60 import com.stoutner.privacybrowser.R;
  61 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
  62
  63 import java.io.ByteArrayOutputStream;
  64
  65 public class BookmarksActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener, EditBookmarkDialog.EditBookmarkListener,
  66         EditBookmarkFolderDialog.EditBookmarkFolderListener, MoveToFolderDialog.MoveToFolderListener {
  67
  68     // `currentFolder` is public static so it can be accessed from `MoveToFolderDialog`.
  69     // It is used in `onCreate`, `onOptionsItemSelected()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`, and `loadFolder()`.
  70     public static String currentFolder;
  71
  72     // `checkedItemIds` is public static so it can be accessed from `MoveToFolderDialog`.  It is also used in `onCreate()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`, and `updateMoveIcons()`.
  73     public static long[] checkedItemIds;
  74
  75
  76     // `bookmarksDatabaseHelper` is used in `onCreate()`, `onOptionsItemSelected()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`, `deleteBookmarkFolderContents()`,
  77     // and `loadFolder().
  78     private BookmarksDatabaseHelper bookmarksDatabaseHelper;
  79
  80     // `bookmarksListView` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`, `updateMoveIcons()`, `scrollBookmarks()`,
  81     // and `loadFolder()`.
  82     private ListView bookmarksListView;
  83
  84     // `bookmarksCursor` is used in `onCreate()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`, `deleteBookmarkFolderContents()`, and `loadFolder()`.
  85     private Cursor bookmarksCursor;
  86
  87     // `bookmarksCursorAdapter` is used in `onCreate(), `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`, and `onLoadFolder()`.
  88     private CursorAdapter bookmarksCursorAdapter;
  89
  90     // `contextualActionMode` is used in `onCreate()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()` and `onMoveToFolder()`.
  91     private ActionMode contextualActionMode;
  92
  93     // `appBar` is used in `onCreate()` and `loadFolder()`.
  94     private ActionBar appBar;
  95
  96     // `oldFolderName` is used in `onCreate()` and `onSaveBookmarkFolder()`.
  97     private String oldFolderNameString;
  98
  99     // `moveBookmarkUpMenuItem` is used in `onCreate()` and `updateMoveIcons`.
 100     private MenuItem moveBookmarkUpMenuItem;
 101
 102     // `moveBookmarkDownMenuItem` is used in `onCreate()` and `updateMoveIcons`.
 103     private MenuItem moveBookmarkDownMenuItem;
 104
 105     @Override
 106     protected void onCreate(Bundle savedInstanceState) {
 107         // Disable screenshots if not allowed.
 108         if (!MainWebViewActivity.allowScreenshots) {
 109             getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
 110         }
 111
 112         // Set the activity theme.
 113         if (MainWebViewActivity.darkTheme) {
 114             setTheme(R.style.PrivacyBrowserDark_SecondaryActivity);
 115         } else {
 116             setTheme(R.style.PrivacyBrowserLight_SecondaryActivity);
 117         }
 118
 119         // Run the default commands.
 120         super.onCreate(savedInstanceState);
 121
 122         // Get the intent that launched the activity.
 123         Intent launchingIntent = getIntent();
 124
 125         // Set the current folder variable.
 126         if (launchingIntent.getStringExtra("Current Folder") != null) {  // Set the current folder from the intent.
 127             currentFolder = launchingIntent.getStringExtra("Current Folder");
 128         } else {  // Set the current folder to be `""`, which is the home folder.
 129             currentFolder = "";
 130         }
 131
 132         // Set the content view.
 133         setContentView(R.layout.bookmarks_coordinatorlayout);
 134
 135         // Use the `SupportActionBar` from `android.support.v7.app.ActionBar` until the minimum API is >= 21.
 136         final Toolbar bookmarksAppBar = findViewById(R.id.bookmarks_toolbar);
 137         setSupportActionBar(bookmarksAppBar);
 138
 139         // Get a handle for the activity, the app bar, and the ListView.
 140         final Activity bookmarksActivity = this;
 141         appBar = getSupportActionBar();
 142         bookmarksListView = findViewById(R.id.bookmarks_listview);
 143
 144         // Remove the incorrect lint warning that `appBar` might be null.
 145         assert appBar != null;
 146
 147         // Display the home arrow on the app bar.
 148         appBar.setDisplayHomeAsUpEnabled(true);
 149
 150         // Initialize the database helper.  `this` specifies the context.  The two `nulls` do not specify the database name or a `CursorFactory`.
 151         // The `0` specifies a database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
 152         bookmarksDatabaseHelper = new BookmarksDatabaseHelper(this, null, null, 0);
 153
 154         // Load the home folder.
 155         loadFolder();
 156
 157         // Set a listener so that tapping a list item loads the URL or folder.
 158         bookmarksListView.setOnItemClickListener((parent, view, position, id) -> {
 159             // Convert the id from long to int to match the format of the bookmarks database.
 160             int databaseID = (int) id;
 161
 162             // Get the bookmark cursor for this ID and move it to the first row.
 163             Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmarkCursor(databaseID);
 164             bookmarkCursor.moveToFirst();
 165
 166             // Act upon the bookmark according to the type.
 167             if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {  // The selected bookmark is a folder.
 168                 // Update the current folder.
 169                 currentFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 170
 171                 // Load the new folder.
 172                 loadFolder();
 173             } else {  // The selected bookmark is not a folder.
 174                 // Get the bookmark URL and assign it to `formattedUrlString`.
 175                 MainWebViewActivity.formattedUrlString = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL));
 176
 177                 // Set `MainWebViewActivity` to load the new URL on restart.
 178                 MainWebViewActivity.loadUrlOnRestart = true;
 179
 180                 // Update the bookmarks folder for the bookmarks drawer in `MainWebViewActivity`.
 181                 MainWebViewActivity.currentBookmarksFolder = currentFolder;
 182
 183                 // Close the bookmarks drawer and reload the bookmarks `ListView` when returning to `MainWebViewActivity`.
 184                 MainWebViewActivity.restartFromBookmarksActivity = true;
 185
 186                 // Return to `MainWebViewActivity`.
 187                 NavUtils.navigateUpFromSameTask(bookmarksActivity);
 188             }
 189
 190             // Close the `Cursor`.
 191             bookmarkCursor.close();
 192         });
 193
 194         // `MultiChoiceModeListener` handles long clicks.
 195         bookmarksListView.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {
 196             // Instantiate the common variables.
 197             MenuItem editBookmarkMenuItem;
 198             MenuItem deleteBookmarksMenuItem;
 199             MenuItem selectAllBookmarksMenuItem;
 200             boolean deletingBookmarks;
 201
 202             @Override
 203             public boolean onCreateActionMode(ActionMode mode, Menu menu) {
 204                 // Inflate the menu for the contextual app bar and set the title.
 205                 getMenuInflater().inflate(R.menu.bookmarks_context_menu, menu);
 206
 207                 // Set the title.
 208                 if (currentFolder.isEmpty()) {
 209                     // Use `R.string.bookmarks` if we are in the home folder.
 210                     mode.setTitle(R.string.bookmarks);
 211                 } else {  // Use the current folder name as the title.
 212                     mode.setTitle(currentFolder);
 213                 }
 214
 215                 // Get a handle for `MenuItems` that need to be selectively disabled.
 216                 moveBookmarkUpMenuItem = menu.findItem(R.id.move_bookmark_up);
 217                 moveBookmarkDownMenuItem = menu.findItem(R.id.move_bookmark_down);
 218                 editBookmarkMenuItem = menu.findItem(R.id.edit_bookmark);
 219                 deleteBookmarksMenuItem = menu.findItem(R.id.delete_bookmark);
 220                 selectAllBookmarksMenuItem = menu.findItem(R.id.context_menu_select_all_bookmarks);
 221
 222                 // Disable the delete bookmarks menu item if a delete is pending.
 223                 if (deletingBookmarks) {
 224                     deleteBookmarksMenuItem.setEnabled(false);
 225                 }
 226
 227                 // Store `contextualActionMode` so it can be closed programatically.
 228                 contextualActionMode = mode;
 229
 230                 // Make it so.
 231                 return true;
 232             }
 233
 234             @Override
 235             public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
 236                 // Get a handle for the move to folder menu item.
 237                 MenuItem moveToFolderMenuItem = menu.findItem(R.id.move_to_folder);
 238
 239                 // Get a `Cursor` with all of the folders.
 240                 Cursor folderCursor = bookmarksDatabaseHelper.getAllFoldersCursor();
 241
 242                 // Enable the move to folder menu item if at least one folder exists.
 243                 moveToFolderMenuItem.setVisible(folderCursor.getCount() > 0);
 244
 245                 // Make it so.
 246                 return true;
 247             }
 248
 249             @Override
 250             public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
 251                 // Get a long array of the selected bookmarks.
 252                 long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 253
 254                 // Calculate the number of selected bookmarks.
 255                 int numberOfSelectedBookmarks = selectedBookmarksLongArray.length;
 256
 257                 // Adjust the `ActionMode` and the `Menu` according to the number of selected bookmarks.
 258                 if (numberOfSelectedBookmarks == 0) {  // No bookmarks are selected.
 259                     // Close the `ActionMode`.
 260                     mode.finish();
 261                 } else if (numberOfSelectedBookmarks == 1) {  // One bookmark is selected.
 262                     // List the number of selected bookmarks in the subtitle.
 263                     mode.setSubtitle(getString(R.string.one_selected));
 264
 265                     // Show the `Move Up`, `Move Down`, and  `Edit` options.
 266                     moveBookmarkUpMenuItem.setVisible(true);
 267                     moveBookmarkDownMenuItem.setVisible(true);
 268                     editBookmarkMenuItem.setVisible(true);
 269
 270                     // Update the enabled status of the move icons.
 271                     updateMoveIcons();
 272                 } else {  // More than one bookmark is selected.
 273                     // List the number of selected bookmarks according to the language.
 274                     if (getString(R.string.android_asset_path).equals("ru")) {  // The Russian translation is used.
 275                         // Convert the number of selected bookmarks to a string.
 276                         String numberOfSelectedBookmarksString = String.valueOf(numberOfSelectedBookmarks);
 277
 278                         // Russian follows rule #7 at <https://developer.mozilla.org/en-US/docs/Mozilla/Localization/Localization_and_Plurals>.
 279                         if (numberOfSelectedBookmarksString.endsWith("1") && !numberOfSelectedBookmarksString.equals("11")) {  //  Ends in 1.
 280                             mode.setSubtitle(numberOfSelectedBookmarks + " " + getString(R.string.selected_russian_ends_in_1));
 281                         } else if ((numberOfSelectedBookmarksString.endsWith("2") || numberOfSelectedBookmarksString.endsWith("3") || numberOfSelectedBookmarksString.endsWith("4")) &&
 282                                 !numberOfSelectedBookmarksString.equals("12") && !numberOfSelectedBookmarksString.equals("13") && !numberOfSelectedBookmarksString.equals("14")) {  // Ends in 2-4.
 283                             mode.setSubtitle(numberOfSelectedBookmarks + " " + getString(R.string.selected_russian_ends_in_2));
 284                         } else {  // Everything else.
 285                             mode.setSubtitle(numberOfSelectedBookmarks + " " + getString(R.string.selected_russian_everything_else));
 286                         }
 287                     } else {  // Another language is used.
 288                         // List the number of selected bookmarks in the subtitle.
 289                         mode.setSubtitle(numberOfSelectedBookmarks + " " + getString(R.string.selected));
 290                     }
 291
 292                     // Hide non-applicable `MenuItems`.
 293                     moveBookmarkUpMenuItem.setVisible(false);
 294                     moveBookmarkDownMenuItem.setVisible(false);
 295                     editBookmarkMenuItem.setVisible(false);
 296                 }
 297
 298                 // Do not show `Select All` if all the bookmarks are already checked.
 299                 if (bookmarksListView.getCheckedItemIds().length == bookmarksListView.getCount()) {
 300                     selectAllBookmarksMenuItem.setVisible(false);
 301                 } else {
 302                     selectAllBookmarksMenuItem.setVisible(true);
 303                 }
 304             }
 305
 306             @Override
 307             public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
 308                 // Get the menu item ID.
 309                 int menuItemId = item.getItemId();
 310
 311                 // Instantiate the common variables.
 312                 int selectedBookmarkPosition;
 313                 int selectedBookmarkNewPosition;
 314                 final SparseBooleanArray selectedBookmarksPositionsSparseBooleanArray;
 315
 316                 switch (menuItemId) {
 317                     case R.id.move_bookmark_up:
 318                         // Get the array of checked bookmark positions.
 319                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 320
 321                         // Store the position of the selected bookmark.  Only one bookmark is selected when `move_bookmark_up` is enabled.
 322                         selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(0);
 323
 324                         // Calculate the new position of the selected bookmark.
 325                         selectedBookmarkNewPosition = selectedBookmarkPosition - 1;
 326
 327                         // Iterate through the bookmarks.
 328                         for (int i = 0; i < bookmarksListView.getCount(); i++) {
 329                             // Get the database ID for the current bookmark.
 330                             int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 331
 332                             // Update the display order for the current bookmark.
 333                             if (i == selectedBookmarkPosition) {  // The current bookmark is the selected bookmark.
 334                                 // Move the current bookmark up one.
 335                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i - 1);
 336                             } else if ((i + 1) == selectedBookmarkPosition){  // The current bookmark is immediately above the selected bookmark.
 337                                 // Move the current bookmark down one.
 338                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i + 1);
 339                             } else {  // The current bookmark is not changing positions.
 340                                 // Move `bookmarksCursor` to the current bookmark position.
 341                                 bookmarksCursor.moveToPosition(i);
 342
 343                                 // Update the display order only if it is not correct in the database.
 344                                 if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
 345                                     bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
 346                                 }
 347                             }
 348                         }
 349
 350                         // Update `bookmarksCursor` with the current contents of the bookmarks database.
 351                         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
 352
 353                         // Update the `ListView`.
 354                         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 355
 356                         // Scroll with the bookmark.
 357                         scrollBookmarks(selectedBookmarkNewPosition);
 358
 359                         // Update the enabled status of the move icons.
 360                         updateMoveIcons();
 361                         break;
 362
 363                     case R.id.move_bookmark_down:
 364                         // Get the array of checked bookmark positions.
 365                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 366
 367                         // Store the position of the selected bookmark.  Only one bookmark is selected when `move_bookmark_down` is enabled.
 368                         selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(0);
 369
 370                         // Calculate the new position of the selected bookmark.
 371                         selectedBookmarkNewPosition = selectedBookmarkPosition + 1;
 372
 373                         // Iterate through the bookmarks.
 374                         for (int i = 0; i <bookmarksListView.getCount(); i++) {
 375                             // Get the database ID for the current bookmark.
 376                             int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 377
 378                             // Update the display order for the current bookmark.
 379                             if (i == selectedBookmarkPosition) {  // The current bookmark is the selected bookmark.
 380                                 // Move the current bookmark down one.
 381                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i + 1);
 382                             } else if ((i - 1) == selectedBookmarkPosition) {  // The current bookmark is immediately below the selected bookmark.
 383                                 // Move the bookmark below the selected bookmark up one.
 384                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i - 1);
 385                             } else {  // The current bookmark is not changing positions.
 386                                 // Move `bookmarksCursor` to the current bookmark position.
 387                                 bookmarksCursor.moveToPosition(i);
 388
 389                                 // Update the display order only if it is not correct in the database.
 390                                 if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
 391                                     bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
 392                                 }
 393                             }
 394                         }
 395
 396                         // Update `bookmarksCursor` with the current contents of the bookmarks database.
 397                         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
 398
 399                         // Update the `ListView`.
 400                         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 401
 402                         // Scroll with the bookmark.
 403                         scrollBookmarks(selectedBookmarkNewPosition);
 404
 405                         // Update the enabled status of the move icons.
 406                         updateMoveIcons();
 407                         break;
 408
 409                     case R.id.move_to_folder:
 410                         // Store `checkedItemIds` for use by the `AlertDialog`.
 411                         checkedItemIds = bookmarksListView.getCheckedItemIds();
 412
 413                         // Show the `MoveToFolderDialog` `AlertDialog` and name the instance `@string/move_to_folder
 414                         AppCompatDialogFragment moveToFolderDialog = new MoveToFolderDialog();
 415                         moveToFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.move_to_folder));
 416                         break;
 417
 418                     case R.id.edit_bookmark:
 419                         // Get the array of checked bookmark positions.
 420                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 421
 422                         // Get the position of the selected bookmark.  Only one bookmark is selected when `edit_bookmark_down` is enabled.
 423                         selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(0);
 424
 425                         // Move the `Cursor` to the selected position and find out if it is a folder.
 426                         bookmarksCursor.moveToPosition(selectedBookmarkPosition);
 427                         boolean isFolder = (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1);
 428
 429                         // Get the selected bookmark database ID.
 430                         int databaseId = bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper._ID));
 431
 432                         // Show the edit bookmark or edit bookmark folder dialog.
 433                         if (isFolder) {
 434                             // Save the current folder name, which is used in `onSaveBookmarkFolder()`.
 435                             oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 436
 437                             // Show the edit bookmark folder dialog.
 438                             AppCompatDialogFragment editFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId);
 439                             editFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_folder));
 440                         } else {
 441                             // Show the edit bookmark dialog.
 442                             AppCompatDialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId);
 443                             editBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_bookmark));
 444                         }
 445                         break;
 446
 447                     case R.id.delete_bookmark:
 448                         // Set the deleting bookmarks flag, which prevents the delete menu item from being enabled until the current process finishes.
 449                         deletingBookmarks = true;
 450
 451                         // Get an array of the selected row IDs.
 452                         final long[] selectedBookmarksIdsLongArray = bookmarksListView.getCheckedItemIds();
 453
 454                         // Get the array of checked bookmarks.  `.clone()` makes a copy that won't change if `bookmarksListView` is reloaded, which is needed for re-selecting the bookmarks on undelete.
 455                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions().clone();
 456
 457                         // Update `bookmarksCursor` with the current contents of the bookmarks database except for the specified database IDs.
 458                         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksCursorExcept(selectedBookmarksIdsLongArray, currentFolder);
 459
 460                         // Update the `ListView`.
 461                         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 462
 463                         // Instantiate `snackbarMessage`.
 464                         String snackbarMessage;
 465
 466                         // Determine how many items are in the array and prepare an appropriate snackbar message.
 467                         if (selectedBookmarksIdsLongArray.length == 1) {
 468                             snackbarMessage = getString(R.string.one_bookmark_deleted);
 469                         } else {
 470                             // Prepare a snackbar according to the language.
 471                             if (getString(R.string.android_asset_path).equals("ru")) {  // The Russian translation is used.
 472                                 // Convert the number of selected bookmarks to a string.
 473                                 String numberOfBookmarksString = String.valueOf(selectedBookmarksIdsLongArray.length);
 474
 475                                 // Russian follows rule #7 at <https://developer.mozilla.org/en-US/docs/Mozilla/Localization/Localization_and_Plurals>.
 476                                 if (numberOfBookmarksString.endsWith("1") && !numberOfBookmarksString.equals("11")) {  //  Ends in 1.
 477                                     snackbarMessage = numberOfBookmarksString + " " + getString(R.string.bookmarks_deleted_russian_ends_in_1);
 478                                 } else if ((numberOfBookmarksString.endsWith("2") || numberOfBookmarksString.endsWith("3") || numberOfBookmarksString.endsWith("4")) &&
 479                                         !numberOfBookmarksString.equals("12") && !numberOfBookmarksString.equals("13") && !numberOfBookmarksString.equals("14")) {  // Ends in 2-4.
 480                                     snackbarMessage = numberOfBookmarksString + " " + getString(R.string.bookmarks_deleted_russian_ends_in_2);
 481                                 } else {  // Everything else.
 482                                     snackbarMessage = numberOfBookmarksString + " " + getString(R.string.bookmarks_deleted_russian_everything_else);
 483                                 }
 484                             } else {  // Another language is used.
 485                                 snackbarMessage = selectedBookmarksIdsLongArray.length + " " + getString(R.string.bookmarks_deleted);
 486                             }
 487                         }
 488
 489                         // Show a SnackBar.
 490                         Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), snackbarMessage, Snackbar.LENGTH_LONG)
 491                                 .setAction(R.string.undo, view -> {
 492                                     // Do nothing because everything will be handled by `onDismissed()` below.
 493                                 })
 494                                 .addCallback(new Snackbar.Callback() {
 495                                     @Override
 496                                     public void onDismissed(Snackbar snackbar, int event) {
 497                                         switch (event) {
 498                                             // The user pushed the `Undo` button.
 499                                             case Snackbar.Callback.DISMISS_EVENT_ACTION:
 500                                                 // Update `bookmarksCursor` with the current contents of the bookmarks database, including the "deleted" bookmarks.
 501                                                 bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
 502
 503                                                 // Update the `ListView`.
 504                                                 bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 505
 506                                                 // Re-select the previously selected bookmarks.
 507                                                 for (int i = 0; i < selectedBookmarksPositionsSparseBooleanArray.size(); i++) {
 508                                                     bookmarksListView.setItemChecked(selectedBookmarksPositionsSparseBooleanArray.keyAt(i), true);
 509                                                 }
 510
 511                                                 break;
 512
 513                                             // The `Snackbar` was dismissed without the `Undo` button being pushed.
 514                                             default:
 515                                                 // Delete each selected bookmark.
 516                                                 for (long databaseIdLong : selectedBookmarksIdsLongArray) {
 517                                                     // Convert `databaseIdLong` to an int.
 518                                                     int databaseIdInt = (int) databaseIdLong;
 519
 520                                                     // Delete the contents of the folder if the selected bookmark is a folder.
 521                                                     if (bookmarksDatabaseHelper.isFolder(databaseIdInt)) {
 522                                                         deleteBookmarkFolderContents(databaseIdInt);
 523                                                     }
 524
 525                                                     // Delete the selected bookmark.
 526                                                     bookmarksDatabaseHelper.deleteBookmark(databaseIdInt);
 527                                                 }
 528
 529                                                 // Update the display order.
 530                                                 for (int i = 0; i < bookmarksListView.getCount(); i++) {
 531                                                     // Get the database ID for the current bookmark.
 532                                                     int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 533
 534                                                     // Move `bookmarksCursor` to the current bookmark position.
 535                                                     bookmarksCursor.moveToPosition(i);
 536
 537                                                     // Update the display order only if it is not correct in the database.
 538                                                     if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
 539                                                         bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
 540                                                     }
 541                                                 }
 542                                         }
 543
 544                                         // Enable the delete bookmarks menu item.
 545                                         deleteBookmarksMenuItem.setEnabled(true);
 546
 547                                         // Reset the deleting bookmarks flag.
 548                                         deletingBookmarks = false;
 549                                     }
 550                                 })
 551                                 //Show the `SnackBar`.
 552                                 .show();
 553
 554                         // Close the `ActionBar`.
 555                         mode.finish();
 556                         break;
 557
 558                     case R.id.context_menu_select_all_bookmarks:
 559                         // Get the total number of bookmarks.
 560                         int numberOfBookmarks = bookmarksListView.getCount();
 561
 562                         // Select them all.
 563                         for (int i = 0; i < numberOfBookmarks; i++) {
 564                             bookmarksListView.setItemChecked(i, true);
 565                         }
 566                         break;
 567                 }
 568
 569                 // Consume the click.
 570                 return true;
 571             }
 572
 573             @Override
 574             public void onDestroyActionMode(ActionMode mode) {
 575                 // Do nothing.
 576             }
 577         });
 578
 579         // Get handles for the `FloatingActionButtons`.
 580         FloatingActionButton createBookmarkFolderFab = findViewById(R.id.create_bookmark_folder_fab);
 581         FloatingActionButton createBookmarkFab = findViewById(R.id.create_bookmark_fab);
 582
 583         // Set the create new bookmark folder FAB to display the `AlertDialog`.
 584         createBookmarkFolderFab.setOnClickListener(v -> {
 585             // Show the `CreateBookmarkFolderDialog` `AlertDialog` and name the instance `@string/create_folder`.
 586             AppCompatDialogFragment createBookmarkFolderDialog = new CreateBookmarkFolderDialog();
 587             createBookmarkFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_folder));
 588         });
 589
 590         // Set the create new bookmark FAB to display the `AlertDialog`.
 591         createBookmarkFab.setOnClickListener(view -> {
 592             // Show the `CreateBookmarkDialog` `AlertDialog` and name the instance `@string/create_bookmark`.
 593             AppCompatDialogFragment createBookmarkDialog = new CreateBookmarkDialog();
 594             createBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_bookmark));
 595         });
 596     }
 597
 598     @Override
 599     public boolean onCreateOptionsMenu(Menu menu) {
 600         // Inflate the menu.
 601         getMenuInflater().inflate(R.menu.bookmarks_options_menu, menu);
 602
 603         // Success.
 604         return true;
 605     }
 606
 607     @Override
 608     public boolean onOptionsItemSelected(MenuItem menuItem) {
 609         // Get the ID of the `MenuItem` that was selected.
 610         int menuItemId = menuItem.getItemId();
 611
 612         switch (menuItemId) {
 613             case android.R.id.home:  // The home arrow is identified as `android.R.id.home`, not just `R.id.home`.
 614                 if (currentFolder.isEmpty()) {  // Currently in the home folder.
 615                     // Update the bookmarks folder for the bookmarks drawer in `MainWebViewActivity`.
 616                     MainWebViewActivity.currentBookmarksFolder = "";
 617
 618                     // Close the bookmarks drawer and reload the bookmarks `ListView` when returning to `MainWebViewActivity`.
 619                     MainWebViewActivity.restartFromBookmarksActivity = true;
 620
 621                     // Return to `MainWebViewActivity`.
 622                     NavUtils.navigateUpFromSameTask(this);
 623                 } else {  // Currently in a subfolder.
 624                     // Place the former parent folder in `currentFolder`.
 625                     currentFolder = bookmarksDatabaseHelper.getParentFolder(currentFolder);
 626
 627                     // Load the new folder.
 628                     loadFolder();
 629                 }
 630                 break;
 631
 632             case R.id.options_menu_select_all_bookmarks:
 633                 // Get the total number of bookmarks.
 634                 int numberOfBookmarks = bookmarksListView.getCount();
 635
 636                 // Select them all.
 637                 for (int i = 0; i < numberOfBookmarks; i++) {
 638                     bookmarksListView.setItemChecked(i, true);
 639                 }
 640                 break;
 641
 642             case R.id.bookmarks_database_view:
 643                 // Launch `BookmarksDatabaseViewActivity`.
 644                 Intent bookmarksDatabaseViewIntent = new Intent(this, BookmarksDatabaseViewActivity.class);
 645                 startActivity(bookmarksDatabaseViewIntent);
 646                 break;
 647         }
 648         return true;
 649     }
 650
 651     @Override
 652     public void onBackPressed() {
 653         if (currentFolder.isEmpty()) {  // Currently in the home folder.
 654             // Update the bookmarks folder for the bookmarks drawer in `MainWebViewActivity`.
 655             MainWebViewActivity.currentBookmarksFolder = "";
 656
 657             // Close the bookmarks drawer and reload the bookmarks `ListView` when returning to `MainWebViewActivity`.
 658             MainWebViewActivity.restartFromBookmarksActivity = true;
 659
 660             // Exit `BookmarksActivity`.
 661             super.onBackPressed();
 662         } else {  // Currently in a subfolder.
 663             // Place the former parent folder in `currentFolder`.
 664             currentFolder = bookmarksDatabaseHelper.getParentFolder(currentFolder);
 665
 666             // Load the new folder.
 667             loadFolder();
 668         }
 669     }
 670
 671     @Override
 672     public void onCreateBookmark(AppCompatDialogFragment dialogFragment) {
 673         // Get the `EditTexts` from the `dialogFragment`.
 674         EditText createBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
 675         EditText createBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
 676
 677         // Extract the strings from the `EditTexts`.
 678         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
 679         String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
 680
 681         // Convert the favoriteIcon Bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
 682         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 683         MainWebViewActivity.favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
 684         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 685
 686         // Display the new bookmark below the current items in the (0 indexed) list.
 687         int newBookmarkDisplayOrder = bookmarksListView.getCount();
 688
 689         // Create the bookmark.
 690         bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
 691
 692         // Update `bookmarksCursor` with the current contents of this folder.
 693         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
 694
 695         // Update the `ListView`.
 696         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 697
 698         // Scroll to the new bookmark.
 699         bookmarksListView.setSelection(newBookmarkDisplayOrder);
 700     }
 701
 702     @Override
 703     public void onCreateBookmarkFolder(AppCompatDialogFragment dialogFragment) {
 704         // Get handles for the views in `dialogFragment`.
 705         EditText createFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.create_folder_name_edittext);
 706         RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon_radiobutton);
 707         ImageView folderIconImageView = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon);
 708
 709         // Get new folder name string.
 710         String folderNameString = createFolderNameEditText.getText().toString();
 711
 712         // Get the new folder icon `Bitmap`.
 713         Bitmap folderIconBitmap;
 714         if (defaultFolderIconRadioButton.isChecked()) {  // Use the default folder icon.
 715             // Get the default folder icon and convert it to a `Bitmap`.
 716             Drawable folderIconDrawable = folderIconImageView.getDrawable();
 717             BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 718             folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 719         } else {  // Use the `WebView` favorite icon.
 720             folderIconBitmap = MainWebViewActivity.favoriteIconBitmap;
 721         }
 722
 723         // Convert `folderIconBitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
 724         ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 725         folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 726         byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 727
 728         // Move all the bookmarks down one in the display order.
 729         for (int i = 0; i < bookmarksListView.getCount(); i++) {
 730             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 731             bookmarksDatabaseHelper.updateDisplayOrder(databaseId, i + 1);
 732         }
 733
 734         // Create the folder, which will be placed at the top of the `ListView`.
 735         bookmarksDatabaseHelper.createFolder(folderNameString, currentFolder, folderIconByteArray);
 736
 737         // Update `bookmarksCursor` with the current contents of this folder.
 738         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
 739
 740         // Update the `ListView`.
 741         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 742
 743         // Scroll to the new folder.
 744         bookmarksListView.setSelection(0);
 745     }
 746
 747     @Override
 748     public void onSaveBookmark(AppCompatDialogFragment dialogFragment, int selectedBookmarkDatabaseId) {
 749         // Get handles for the views from `dialogFragment`.
 750         EditText editBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
 751         EditText editBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
 752         RadioButton currentBookmarkIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
 753
 754         // Store the bookmark strings.
 755         String bookmarkNameString = editBookmarkNameEditText.getText().toString();
 756         String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
 757
 758         // Update the bookmark.
 759         if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
 760             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
 761         } else {  // Update the bookmark using the `WebView` favorite icon.
 762             // Convert the favorite icon to a byte array.  `0` is for lossless compression (the only option for a PNG).
 763             ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 764             MainWebViewActivity.favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
 765             byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
 766
 767             //  Update the bookmark and the favorite icon.
 768             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
 769         }
 770
 771         // Close the contextual action mode.
 772         contextualActionMode.finish();
 773
 774         // Update `bookmarksCursor` with the contents of the current folder.
 775         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
 776
 777         // Update the `ListView`.
 778         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 779     }
 780
 781     @Override
 782     public void onSaveBookmarkFolder(AppCompatDialogFragment dialogFragment, int selectedFolderDatabaseId) {
 783         // Get handles for the views from `dialogFragment`.
 784         RadioButton currentFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
 785         RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
 786         ImageView defaultFolderIconImageView = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_imageview);
 787         EditText editFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
 788
 789         // Get the new folder name.
 790         String newFolderNameString = editFolderNameEditText.getText().toString();
 791
 792         // Check if the favorite icon has changed.
 793         if (currentFolderIconRadioButton.isChecked()) {  // Only the name has changed.
 794             // Update the name in the database.
 795             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
 796         } else if (!currentFolderIconRadioButton.isChecked() && newFolderNameString.equals(oldFolderNameString)) {  // Only the icon has changed.
 797             // Get the new folder icon `Bitmap`.
 798             Bitmap folderIconBitmap;
 799             if (defaultFolderIconRadioButton.isChecked()) {
 800                 // Get the default folder icon and convert it to a `Bitmap`.
 801                 Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
 802                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 803                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 804             } else {  // Use the `WebView` favorite icon.
 805                 folderIconBitmap = MainWebViewActivity.favoriteIconBitmap;
 806             }
 807
 808             // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
 809             ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 810             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 811             byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 812
 813             // Update the folder icon in the database.
 814             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, folderIconByteArray);
 815         } else {  // The folder icon and the name have changed.
 816             // Instantiate the new folder icon `Bitmap`.
 817             Bitmap folderIconBitmap;
 818
 819             // Populate the new folder icon bitmap.
 820             if (defaultFolderIconRadioButton.isChecked()) {
 821                 // Get the default folder icon and convert it to a `Bitmap`.
 822                 Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
 823                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 824                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 825             } else {  // Use the `WebView` favorite icon.
 826                 folderIconBitmap = MainWebViewActivity.favoriteIconBitmap;
 827             }
 828
 829             // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
 830             ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 831             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 832             byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 833
 834             // Update the folder name and icon in the database.
 835             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, folderIconByteArray);
 836         }
 837
 838         // Update `bookmarksCursor` with the current contents of this folder.
 839         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
 840
 841         // Update the `ListView`.
 842         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 843
 844         // Close the contextual action mode.
 845         contextualActionMode.finish();
 846     }
 847
 848     @Override
 849     public void onMoveToFolder(AppCompatDialogFragment dialogFragment) {
 850         // Get a handle for the `ListView` from `dialogFragment`.
 851         ListView folderListView = dialogFragment.getDialog().findViewById(R.id.move_to_folder_listview);
 852
 853         // Store a long array of the selected folders.
 854         long[] newFolderLongArray = folderListView.getCheckedItemIds();
 855
 856         // Get the new folder database ID.  Only one folder will be selected.
 857         int newFolderDatabaseId = (int) newFolderLongArray[0];
 858
 859         // Instantiate `newFolderName`.
 860         String newFolderName;
 861
 862         // Set the new folder name.
 863         if (newFolderDatabaseId == 0) {
 864             // The new folder is the home folder, represented as `""` in the database.
 865             newFolderName = "";
 866         } else {
 867             // Get the new folder name from the database.
 868             newFolderName = bookmarksDatabaseHelper.getFolderName(newFolderDatabaseId);
 869         }
 870
 871         // Get a long array with the the database ID of the selected bookmarks.
 872         long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 873
 874         // Move each of the selected bookmarks to the new folder.
 875         for (long databaseIdLong : selectedBookmarksLongArray) {
 876             // Get `databaseIdInt` for each selected bookmark.
 877             int databaseIdInt = (int) databaseIdLong;
 878
 879             // Move the selected bookmark to the new folder.
 880             bookmarksDatabaseHelper.moveToFolder(databaseIdInt, newFolderName);
 881         }
 882
 883         // Update `bookmarksCursor` with the current contents of this folder.
 884         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
 885
 886         // Update the `ListView`.
 887         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 888
 889         // Close the contextual app bar.
 890         contextualActionMode.finish();
 891     }
 892
 893     private void deleteBookmarkFolderContents(int databaseId) {
 894         // Get the name of the folder.
 895         String folderName = bookmarksDatabaseHelper.getFolderName(databaseId);
 896
 897         // Get the contents of the folder.
 898         Cursor folderCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(folderName);
 899
 900         // Delete each of the bookmarks in the folder.
 901         for (int i = 0; i < folderCursor.getCount(); i++) {
 902             // Move `folderCursor` to the current row.
 903             folderCursor.moveToPosition(i);
 904
 905             // Get the database ID of the item.
 906             int itemDatabaseId = folderCursor.getInt(folderCursor.getColumnIndex(BookmarksDatabaseHelper._ID));
 907
 908             // If this is a folder, recursively delete the contents first.
 909             if (bookmarksDatabaseHelper.isFolder(itemDatabaseId)) {
 910                 deleteBookmarkFolderContents(itemDatabaseId);
 911             }
 912
 913             // Delete the bookmark.
 914             bookmarksDatabaseHelper.deleteBookmark(itemDatabaseId);
 915         }
 916     }
 917
 918     private void updateMoveIcons() {
 919         // Get a long array of the selected bookmarks.
 920         long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 921
 922         // Get the database IDs for the first, last, and selected bookmarks.
 923         int selectedBookmarkDatabaseId = (int) selectedBookmarksLongArray[0];
 924         int firstBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(0);
 925         // bookmarksListView is 0 indexed.
 926         int lastBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(bookmarksListView.getCount() - 1);
 927
 928         // Update the move bookmark up `MenuItem`.
 929         if (selectedBookmarkDatabaseId == firstBookmarkDatabaseId) {  // The selected bookmark is in the first position.
 930             // Disable the move bookmark up `MenuItem`.
 931             moveBookmarkUpMenuItem.setEnabled(false);
 932
 933             //  Set the move bookmark up icon to be ghosted.
 934             moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_disabled);
 935         } else {  // The selected bookmark is not in the first position.
 936             // Enable the move bookmark up `MenuItem`.
 937             moveBookmarkUpMenuItem.setEnabled(true);
 938
 939             // Set the icon according to the theme.
 940             if (MainWebViewActivity.darkTheme) {
 941                 moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_enabled_dark);
 942             } else {
 943                 moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_enabled_light);
 944             }
 945         }
 946
 947         // Update the move bookmark down `MenuItem`.
 948         if (selectedBookmarkDatabaseId == lastBookmarkDatabaseId) {  // The selected bookmark is in the last position.
 949             // Disable the move bookmark down `MenuItem`.
 950             moveBookmarkDownMenuItem.setEnabled(false);
 951
 952             // Set the move bookmark down icon to be ghosted.
 953             moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_disabled);
 954         } else {  // The selected bookmark is not in the last position.
 955             // Enable the move bookmark down `MenuItem`.
 956             moveBookmarkDownMenuItem.setEnabled(true);
 957
 958             // Set the icon according to the theme.
 959             if (MainWebViewActivity.darkTheme) {
 960                 moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_enabled_dark);
 961             } else {
 962                 moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_enabled_light);
 963             }
 964         }
 965     }
 966
 967     private void scrollBookmarks(int selectedBookmarkPosition) {
 968         // Get the first and last visible bookmark positions.
 969         int firstVisibleBookmarkPosition = bookmarksListView.getFirstVisiblePosition();
 970         int lastVisibleBookmarkPosition = bookmarksListView.getLastVisiblePosition();
 971
 972         // Calculate the number of bookmarks per screen.
 973         int numberOfBookmarksPerScreen = lastVisibleBookmarkPosition - firstVisibleBookmarkPosition;
 974
 975         // Scroll with the moved bookmark if necessary.
 976         if (selectedBookmarkPosition <= firstVisibleBookmarkPosition) {  // The selected bookmark position is at or above the top of the screen.
 977             // Scroll to the selected bookmark position.
 978             bookmarksListView.setSelection(selectedBookmarkPosition);
 979         } else if (selectedBookmarkPosition >= (lastVisibleBookmarkPosition - 1)) {  // The selected bookmark is at or below the bottom of the screen.  The `-1` handles partial bookmarks displayed at the bottom of the `ListView`.
 980             // Scroll to display the selected bookmark at the bottom of the screen.  `+1` assured that the entire bookmark will be displayed in situations where only a partial bookmark fits at the bottom of the `ListView`.
 981             bookmarksListView.setSelection(selectedBookmarkPosition - numberOfBookmarksPerScreen + 1);
 982         }
 983     }
 984
 985     private void loadFolder() {
 986         // Update `bookmarksCursor` with the contents of the bookmarks database for the current folder.
 987         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentFolder);
 988
 989         // Setup a `CursorAdapter`.  `this` specifies the `Context`.  `false` disables `autoRequery`.
 990         bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
 991             @Override
 992             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 993                 // Inflate the individual item layout.  `false` does not attach it to the root.
 994                 return getLayoutInflater().inflate(R.layout.bookmarks_activity_item_linearlayout, parent, false);
 995             }
 996
 997             @Override
 998             public void bindView(View view, Context context, Cursor cursor) {
 999                 // Get handles for the views.
1000                 ImageView bookmarkFavoriteIcon = view.findViewById(R.id.bookmark_favorite_icon);
1001                 TextView bookmarkNameTextView = view.findViewById(R.id.bookmark_name);
1002
1003                 // Get the favorite icon byte array from the `Cursor`.
1004                 byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
1005
1006                 // Convert the byte array to a `Bitmap` beginning at the first byte and ending at the last.
1007                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
1008
1009                 // Display the bitmap in `bookmarkFavoriteIcon`.
1010                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
1011
1012                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
1013                 String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
1014                 bookmarkNameTextView.setText(bookmarkNameString);
1015
1016                 // Make the font bold for folders.
1017                 if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
1018                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT_BOLD);
1019                 } else {  // Reset the font to default for normal bookmarks.
1020                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
1021                 }
1022             }
1023         };
1024
1025         // Populate the `ListView` with the adapter.
1026         bookmarksListView.setAdapter(bookmarksCursorAdapter);
1027
1028         // Set the `AppBar` title.
1029         if (currentFolder.isEmpty()) {
1030             appBar.setTitle(R.string.bookmarks);
1031         } else {
1032             appBar.setTitle(currentFolder);
1033         }
1034     }
1035 }