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

   1 /*
   2  * Copyright 2016-2017 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 import android.support.v7.app.AppCompatDialogFragment;
  38 import android.support.v7.widget.Toolbar;
  39 import android.util.SparseBooleanArray;
  40 import android.view.ActionMode;
  41 import android.view.Menu;
  42 import android.view.MenuItem;
  43 import android.view.View;
  44 import android.view.ViewGroup;
  45 import android.widget.AbsListView;
  46 import android.widget.AdapterView;
  47 import android.widget.CursorAdapter;
  48 import android.widget.EditText;
  49 import android.widget.ImageView;
  50 import android.widget.ListView;
  51 import android.widget.RadioButton;
  52 import android.widget.TextView;
  53
  54 import com.stoutner.privacybrowser.dialogs.EditBookmark;
  55 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolder;
  56 import com.stoutner.privacybrowser.dialogs.MoveToFolder;
  57 import com.stoutner.privacybrowser.R;
  58 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
  59 import com.stoutner.privacybrowser.dialogs.CreateBookmark;
  60 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolder;
  61
  62 import java.io.ByteArrayOutputStream;
  63
  64 public class Bookmarks extends AppCompatActivity implements CreateBookmark.CreateBookmarkListener, CreateBookmarkFolder.CreateBookmarkFolderListener, EditBookmark.EditBookmarkListener, EditBookmarkFolder.EditBookmarkFolderListener,
  65         MoveToFolder.MoveToFolderListener {
  66
  67     // `bookmarksDatabaseHelper` is public static so it can be accessed from `EditBookmark` and `MoveToFolder`.  It is also used in `onCreate()`,
  68     // `onCreateBookmarkCreate()`, `updateBookmarksListView()`, and `updateBookmarksListViewExcept()`.
  69     public static BookmarksDatabaseHelper bookmarksDatabaseHelper;
  70
  71     // `currentFolder` is public static so it can be accessed from `MoveToFolder`.
  72     // It is used in `onCreate`, `onOptionsItemSelected()`, `onCreateBookmarkCreate`, `onCreateBookmarkFolderCreate`, and `onEditBookmarkSave`.
  73     public static String currentFolder;
  74
  75     // `checkedItemIds` is public static so it can be accessed from `EditBookmark`, `EditBookmarkFolder`, and `MoveToFolder`.
  76     // It is also used in `onActionItemClicked`.
  77     public static long[] checkedItemIds;
  78
  79
  80     // `bookmarksListView` is used in `onCreate()`, `updateBookmarksListView()`, and `updateBookmarksListViewExcept()`.
  81     private ListView bookmarksListView;
  82
  83     // `contextualActionMode` is used in `onCreate()` and `onEditBookmarkSave()`.
  84     private ActionMode contextualActionMode;
  85
  86     // `selectedBookmarkPosition` is used in `onCreate()` and `onEditBookmarkSave()`.
  87     private int selectedBookmarkPosition;
  88
  89     // `appBar` is used in `onCreate()` and `updateBookmarksListView()`.
  90     private ActionBar appBar;
  91
  92     // `bookmarksCursor` is used in `onCreate()`, `updateBookmarksListView()`, and `updateBookmarksListViewExcept()`.
  93     private Cursor bookmarksCursor;
  94
  95     // `oldFolderName` is used in `onCreate()` and `onEditBookmarkFolderSave()`.
  96     private String oldFolderNameString;
  97
  98     @Override
  99     protected void onCreate(Bundle savedInstanceState) {
 100         super.onCreate(savedInstanceState);
 101         setContentView(R.layout.bookmarks_coordinatorlayout);
 102
 103         // We need to use the `SupportActionBar` from `android.support.v7.app.ActionBar` until the minimum API is >= 21.
 104         final Toolbar bookmarksAppBar = (Toolbar) findViewById(R.id.bookmarks_toolbar);
 105         setSupportActionBar(bookmarksAppBar);
 106
 107         // Display the home arrow on `SupportActionBar`.
 108         appBar = getSupportActionBar();
 109         assert appBar != null;// This assert removes the incorrect warning in Android Studio on the following line that `appBar` might be null.
 110         appBar.setDisplayHomeAsUpEnabled(true);
 111
 112
 113         // Initialize the database handler and the `ListView`.  `this` specifies the context.  The two `nulls` do not specify the database name or a `CursorFactory`.
 114         // The `0` specifies a database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
 115         bookmarksDatabaseHelper = new BookmarksDatabaseHelper(this, null, null, 0);
 116         bookmarksListView = (ListView) findViewById(R.id.bookmarks_listview);
 117
 118         // Set currentFolder to the home folder, which is `""` in the database.
 119         currentFolder = "";
 120
 121         // Display the bookmarks in the ListView.
 122         updateBookmarksListView(currentFolder);
 123
 124         // Set a listener so that tapping a list item loads the URL.  We need to store the activity in a variable so that we can return to the parent activity after loading the URL.
 125         final Activity bookmarksActivity = this;
 126         bookmarksListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
 127             @Override
 128             public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
 129                 // Convert the id from long to int to match the format of the bookmarks database.
 130                 int databaseID = (int) id;
 131
 132                 // Get the bookmark `Cursor` for this ID and move it to the first row.
 133                 Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmarkCursor(databaseID);
 134                 bookmarkCursor.moveToFirst();
 135
 136                 // If the bookmark is a folder load its contents into the ListView.
 137                 if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
 138                     // Update `currentFolder`.
 139                     currentFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 140
 141                     // Reload the ListView with `currentFolder`.
 142                     updateBookmarksListView(currentFolder);
 143                 } else {  // Load the URL into `mainWebView`.
 144                     // Get the bookmark URL and assign it to formattedUrlString.  `mainWebView` will automatically reload when `Bookmarks` closes.
 145                     MainWebView.formattedUrlString = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL));
 146
 147                     NavUtils.navigateUpFromSameTask(bookmarksActivity);
 148                 }
 149
 150                 // Close the `Cursor`.
 151                 bookmarkCursor.close();
 152             }
 153         });
 154
 155         // `MultiChoiceModeListener` handles long clicks.
 156         bookmarksListView.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {
 157             // `moveBookmarkUpMenuItem` is used in `onCreateActionMode()` and `onItemCheckedStateChanged`.
 158             MenuItem moveBookmarkUpMenuItem;
 159
 160             // `moveBookmarkDownMenuItem` is used in `onCreateActionMode()` and `onItemCheckedStateChanged`.
 161             MenuItem moveBookmarkDownMenuItem;
 162
 163             // `editBookmarkMenuItem` is used in `onCreateActionMode()` and `onItemCheckedStateChanged`.
 164             MenuItem editBookmarkMenuItem;
 165
 166             // `selectAllBookmarks` is used in `onCreateActionMode()` and `onItemCheckedStateChanges`.
 167             MenuItem selectAllBookmarksMenuItem;
 168
 169             @Override
 170             public boolean onCreateActionMode(ActionMode mode, Menu menu) {
 171                 // Inflate the menu for the contextual app bar and set the title.
 172                 getMenuInflater().inflate(R.menu.bookmarks_context_menu, menu);
 173
 174                 // Set the title.
 175                 if (currentFolder.isEmpty()) {
 176                     // Use `R.string.bookmarks` if we are in the home folder.
 177                     mode.setTitle(R.string.bookmarks);
 178                 } else {  // Use the current folder name as the title.
 179                     mode.setTitle(currentFolder);
 180                 }
 181
 182                 // Get a handle for MenuItems we need to selectively disable.
 183                 moveBookmarkUpMenuItem = menu.findItem(R.id.move_bookmark_up);
 184                 moveBookmarkDownMenuItem = menu.findItem(R.id.move_bookmark_down);
 185                 editBookmarkMenuItem = menu.findItem(R.id.edit_bookmark);
 186                 selectAllBookmarksMenuItem = menu.findItem(R.id.context_menu_select_all_bookmarks);
 187
 188                 // Get a handle for `contextualActionMode` so we can close it programatically.
 189                 contextualActionMode = mode;
 190
 191                 return true;
 192             }
 193
 194             @Override
 195             public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
 196                 return false;
 197             }
 198
 199             @Override
 200             public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
 201                 // Get an array of the selected bookmarks.
 202                 long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 203
 204                 // Calculate the number of selected bookmarks.
 205                 int numberOfSelectedBookmarks = selectedBookmarksLongArray.length;
 206
 207                 // Adjust the `mode` and the menu for the number of selected bookmarks.
 208                 if (numberOfSelectedBookmarks == 0) {
 209                     mode.finish();
 210                 } else if (numberOfSelectedBookmarks == 1) {
 211                     // List the number of selected bookmarks in the subtitle.
 212                     mode.setSubtitle(getString(R.string.one_selected));
 213
 214                     // Show the `Move Up`, `Move Down`, and  `Edit` options.
 215                     moveBookmarkUpMenuItem.setVisible(true);
 216                     moveBookmarkDownMenuItem.setVisible(true);
 217                     editBookmarkMenuItem.setVisible(true);
 218
 219                     // Get the database IDs for the bookmarks.
 220                     int selectedBookmarkDatabaseId = (int) selectedBookmarksLongArray[0];
 221                     int firstBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(0);
 222                     // bookmarksListView is 0 indexed.
 223                     int lastBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(bookmarksListView.getCount() - 1);
 224
 225                     // Disable `moveBookmarkUpMenuItem` if the selected bookmark is at the top of the ListView.
 226                     if (selectedBookmarkDatabaseId == firstBookmarkDatabaseId) {
 227                         moveBookmarkUpMenuItem.setEnabled(false);
 228                         moveBookmarkUpMenuItem.setIcon(R.drawable.move_bookmark_up_disabled);
 229                     } else {  // Otherwise enable `moveBookmarkUpMenuItem`.
 230                         moveBookmarkUpMenuItem.setEnabled(true);
 231                         moveBookmarkUpMenuItem.setIcon(R.drawable.move_bookmark_up_enabled);
 232                     }
 233
 234                     // Disable `moveBookmarkDownMenuItem` if the selected bookmark is at the bottom of the ListView.
 235                     if (selectedBookmarkDatabaseId == lastBookmarkDatabaseId) {
 236                         moveBookmarkDownMenuItem.setEnabled(false);
 237                         moveBookmarkDownMenuItem.setIcon(R.drawable.move_bookmark_down_disabled);
 238                     } else {  // Otherwise enable `moveBookmarkDownMenuItem`.
 239                         moveBookmarkDownMenuItem.setEnabled(true);
 240                         moveBookmarkDownMenuItem.setIcon(R.drawable.move_bookmark_down_enabled);
 241                     }
 242                 } else {  // More than one bookmark is selected.
 243                     // List the number of selected bookmarks in the subtitle.
 244                     mode.setSubtitle(numberOfSelectedBookmarks + " " + getString(R.string.selected));
 245
 246                     // Hide non-applicable `MenuItems`.
 247                     moveBookmarkUpMenuItem.setVisible(false);
 248                     moveBookmarkDownMenuItem.setVisible(false);
 249                     editBookmarkMenuItem.setVisible(false);
 250                 }
 251
 252                 // Do not show `Select All` if all the bookmarks are already checked.
 253                 if (bookmarksListView.getCheckedItemIds().length == bookmarksListView.getCount()) {
 254                     selectAllBookmarksMenuItem.setVisible(false);
 255                 } else {
 256                     selectAllBookmarksMenuItem.setVisible(true);
 257                 }
 258             }
 259
 260             @Override
 261             public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
 262                 int menuItemId = item.getItemId();
 263
 264                 // `numberOfBookmarks` is used in `R.id.move_bookmark_up_enabled`, `R.id.move_bookmark_down_enabled`, and `R.id.context_menu_select_all_bookmarks`.
 265                 int numberOfBookmarks;
 266
 267                 // `selectedBookmarkLongArray` is used in `R.id.move_bookmark_up`, `R.id.move_bookmark_down`, and `R.id.edit_bookmark`.
 268                 long[]selectedBookmarkLongArray;
 269                 // `selectedBookmarkDatabaseId` is used in `R.id.move_bookmark_up`, `R.id.move_bookmark_down`, and `R.id.edit_bookmark`.
 270                 int selectedBookmarkDatabaseId;
 271                 // `selectedBookmarkNewPosition` is used in `R.id.move_bookmark_up` and `R.id.move_bookmark_down`.
 272                 int selectedBookmarkNewPosition;
 273                 // `bookmarkPositionSparseBooleanArray` is used in `R.id.edit_bookmark` and `R.id.delete_bookmark`.
 274                 SparseBooleanArray bookmarkPositionSparseBooleanArray;
 275
 276                 switch (menuItemId) {
 277                     case R.id.move_bookmark_up:
 278                         // Get the selected bookmark database ID.
 279                         selectedBookmarkLongArray = bookmarksListView.getCheckedItemIds();
 280                         selectedBookmarkDatabaseId = (int) selectedBookmarkLongArray[0];
 281
 282                         // Initialize `selectedBookmarkNewPosition`.
 283                         selectedBookmarkNewPosition = 0;
 284
 285                         for (int i = 0; i < bookmarksListView.getCount(); i++) {
 286                             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 287                             int nextBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i + 1);
 288
 289                             if (databaseId == selectedBookmarkDatabaseId || nextBookmarkDatabaseId == selectedBookmarkDatabaseId) {
 290                                 if (databaseId == selectedBookmarkDatabaseId) {
 291                                     // Move the selected bookmark up one and store the new bookmark position.
 292                                     bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i - 1);
 293                                     selectedBookmarkNewPosition = i - 1;
 294                                 } else {  // Move the bookmark above the selected bookmark down one.
 295                                     bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i + 1);
 296                                 }
 297                             } else {
 298                                 // Reset the rest of the bookmarks' DISPLAY_ORDER to match the position in the ListView.
 299                                 // This isn't necessary, but it clears out any stray values that might have crept into the database.
 300                                 bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i);
 301                             }
 302                         }
 303
 304                         // Refresh the ListView.
 305                         updateBookmarksListView(currentFolder);
 306
 307                         // Select the previously selected bookmark in the new location.
 308                         bookmarksListView.setItemChecked(selectedBookmarkNewPosition, true);
 309
 310                         bookmarksListView.setSelection(selectedBookmarkNewPosition - 5);
 311
 312                         break;
 313
 314                     case R.id.move_bookmark_down:
 315                         // Get the selected bookmark database ID.
 316                         selectedBookmarkLongArray = bookmarksListView.getCheckedItemIds();
 317                         selectedBookmarkDatabaseId = (int) selectedBookmarkLongArray[0];
 318
 319                         // Initialize `selectedBookmarkNewPosition`.
 320                         selectedBookmarkNewPosition = 0;
 321
 322                         for (int i = 0; i <bookmarksListView.getCount(); i++) {
 323                             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 324                             int previousBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i - 1);
 325
 326                             if (databaseId == selectedBookmarkDatabaseId || previousBookmarkDatabaseId == selectedBookmarkDatabaseId) {
 327                                 if (databaseId == selectedBookmarkDatabaseId) {
 328                                     // Move the selected bookmark down one and store the new bookmark position.
 329                                     bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i + 1);
 330                                     selectedBookmarkNewPosition = i + 1;
 331                                 } else {  // Move the bookmark below the selected bookmark up one.
 332                                     bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i - 1);
 333                                 }
 334                             } else {
 335                                 // Reset the rest of the bookmark' DISPLAY_ORDER to match the position in the ListView.
 336                                 // This isn't necessary, but it clears out any stray values that might have crept into the database.
 337                                 bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i);
 338                             }
 339                         }
 340
 341                         // Refresh the ListView.
 342                         updateBookmarksListView(currentFolder);
 343
 344                         // Select the previously selected bookmark in the new location.
 345                         bookmarksListView.setItemChecked(selectedBookmarkNewPosition, true);
 346
 347                         bookmarksListView.setSelection(selectedBookmarkNewPosition - 5);
 348                         break;
 349
 350                     case R.id.move_to_folder:
 351                         // Store `checkedItemIds` for use by the `AlertDialog`.
 352                         checkedItemIds = bookmarksListView.getCheckedItemIds();
 353
 354                         // Show the `MoveToFolder` `AlertDialog` and name the instance `@string/move_to_folder
 355                         AppCompatDialogFragment moveToFolderDialog = new MoveToFolder();
 356                         moveToFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.move_to_folder));
 357                         break;
 358
 359                     case R.id.edit_bookmark:
 360                         // Get a handle for `selectedBookmarkPosition` so we can scroll to it after refreshing the ListView.
 361                         bookmarkPositionSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 362                         for (int i = 0; i < bookmarkPositionSparseBooleanArray.size(); i++) {
 363                             // Find the bookmark that is selected and save the position to `selectedBookmarkPosition`.
 364                             if (bookmarkPositionSparseBooleanArray.valueAt(i))
 365                                 selectedBookmarkPosition = bookmarkPositionSparseBooleanArray.keyAt(i);
 366                         }
 367
 368                         // Move to the selected database ID and find out if it is a folder.
 369                         bookmarksCursor.moveToPosition(selectedBookmarkPosition);
 370                         boolean isFolder = (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1);
 371
 372                         // Store `checkedItemIds` for use by the `AlertDialog`.
 373                         checkedItemIds = bookmarksListView.getCheckedItemIds();
 374
 375                         if (isFolder) {
 376                             // Save the current folder name.
 377                             oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 378
 379                             // Show the `EditBookmarkFolder` `AlertDialog` and name the instance `@string/edit_folder`.
 380                             AppCompatDialogFragment editFolderDialog = new EditBookmarkFolder();
 381                             editFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_folder));
 382                         } else {
 383                             // Show the `EditBookmark` `AlertDialog` and name the instance `@string/edit_bookmark`.
 384                             AppCompatDialogFragment editBookmarkDialog = new EditBookmark();
 385                             editBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_bookmark));
 386                         }
 387                         break;
 388
 389                     case R.id.delete_bookmark:
 390                         // Get an array of the selected rows.
 391                         final long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 392
 393                         // Get a handle for `selectedBookmarkPosition` so we can scroll to it after refreshing the ListView.
 394                         bookmarkPositionSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 395                         for (int i = 0; i < bookmarkPositionSparseBooleanArray.size(); i++) {
 396                             // Find the bookmark that is selected and save the position to `selectedBookmarkPosition`.
 397                             if (bookmarkPositionSparseBooleanArray.valueAt(i))
 398                                 selectedBookmarkPosition = bookmarkPositionSparseBooleanArray.keyAt(i);
 399                         }
 400
 401                         updateBookmarksListViewExcept(selectedBookmarksLongArray, currentFolder);
 402
 403                         // Scroll to where the deleted bookmark was located.
 404                         bookmarksListView.setSelection(selectedBookmarkPosition - 5);
 405
 406                         String snackbarMessage;
 407
 408                         // Determine how many items are in the array and prepare an appropriate Snackbar message.
 409                         if (selectedBookmarksLongArray.length == 1) {
 410                             snackbarMessage = getString(R.string.one_bookmark_deleted);
 411                         } else {
 412                             snackbarMessage = selectedBookmarksLongArray.length + " " + getString(R.string.bookmarks_deleted);
 413                         }
 414
 415                         // Show a SnackBar.
 416                         Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), snackbarMessage, Snackbar.LENGTH_LONG)
 417                                 .setAction(R.string.undo, new View.OnClickListener() {
 418                                     @Override
 419                                     public void onClick(View view) {
 420                                         // Do nothing because everything will be handled by `onDismissed()` below.
 421                                     }
 422                                 })
 423                                 .addCallback(new Snackbar.Callback() {
 424                                     @Override
 425                                     public void onDismissed(Snackbar snackbar, int event) {
 426                                         // Android Studio wants to see entries for every possible `Snackbar.Callback` even if they aren't used.
 427                                         switch (event) {
 428                                             // The user pushed the "Undo" button.
 429                                             case Snackbar.Callback.DISMISS_EVENT_ACTION:
 430                                                 // Refresh the ListView to show the rows again.
 431                                                 updateBookmarksListView(currentFolder);
 432
 433                                                 // Scroll to where the deleted bookmark was located.
 434                                                 bookmarksListView.setSelection(selectedBookmarkPosition - 5);
 435
 436                                                 break;
 437
 438                                             case Snackbar.Callback.DISMISS_EVENT_CONSECUTIVE:
 439                                                 // Do nothing and let the default behavior run.
 440
 441                                             case Snackbar.Callback.DISMISS_EVENT_MANUAL:
 442                                                 // Do nothing and let the default behavior run.
 443
 444                                             case Snackbar.Callback.DISMISS_EVENT_SWIPE:
 445                                                 // Do nothing and let the default behavior run.
 446
 447                                             case Snackbar.Callback.DISMISS_EVENT_TIMEOUT:
 448                                                 // Do nothing and let the default behavior run.
 449
 450                                             // The Snackbar was dismissed without the "Undo" button being pushed.
 451                                             default:
 452                                                 // Delete each selected row.
 453                                                 for (long databaseIdLong : selectedBookmarksLongArray) {
 454                                                     // Convert `databaseIdLong` to an int.
 455                                                     int databaseIdInt = (int) databaseIdLong;
 456
 457                                                     if (bookmarksDatabaseHelper.isFolder(databaseIdInt)) {
 458                                                         deleteBookmarkFolderContents(databaseIdInt);
 459                                                     }
 460
 461                                                     // Delete `databaseIdInt`.
 462                                                     bookmarksDatabaseHelper.deleteBookmark(databaseIdInt);
 463                                                 }
 464                                                 break;
 465                                         }
 466                                     }
 467                                 })
 468                                 .show();
 469
 470                         // Close the contextual app bar.
 471                         mode.finish();
 472                         break;
 473
 474                     case R.id.context_menu_select_all_bookmarks:
 475                         numberOfBookmarks = bookmarksListView.getCount();
 476
 477                         for (int i = 0; i < numberOfBookmarks; i++) {
 478                             bookmarksListView.setItemChecked(i, true);
 479                         }
 480                         break;
 481                 }
 482                 // Consume the click.
 483                 return true;
 484             }
 485
 486             @Override
 487             public void onDestroyActionMode(ActionMode mode) {
 488
 489             }
 490         });
 491
 492         // Set a FloatingActionButton for creating new bookmarks.
 493         FloatingActionButton createBookmarkFAB = (FloatingActionButton) findViewById(R.id.create_bookmark_fab);
 494         createBookmarkFAB.setOnClickListener(new View.OnClickListener() {
 495             @Override
 496             public void onClick(View view) {
 497                 // Show the `CreateBookmark` `AlertDialog` and name the instance `@string/create_bookmark`.
 498                 AppCompatDialogFragment createBookmarkDialog = new CreateBookmark();
 499                 createBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_bookmark));
 500             }
 501         });
 502     }
 503
 504     @Override
 505     public boolean onCreateOptionsMenu(Menu menu) {
 506         //Inflate the menu.
 507         getMenuInflater().inflate(R.menu.bookmarks_options_menu, menu);
 508
 509         return true;
 510     }
 511
 512     @Override
 513     public boolean onPrepareOptionsMenu(Menu menu) {
 514         super.onPrepareOptionsMenu(menu);
 515
 516         return true;
 517     }
 518
 519     @Override
 520     public boolean onOptionsItemSelected(MenuItem menuItem) {
 521         int menuItemId = menuItem.getItemId();
 522
 523         switch (menuItemId) {
 524             case android.R.id.home:
 525                 if (currentFolder.isEmpty()) {  // Exit Bookmarks if currently in the home folder.
 526                     NavUtils.navigateUpFromSameTask(this);
 527                 } else {  // Navigate up one folder.
 528                     // Place the former parent folder in `currentFolder`.
 529                     currentFolder = bookmarksDatabaseHelper.getParentFolder(currentFolder);
 530
 531                     // Exit Bookmarks if currently in the home folder.
 532                     updateBookmarksListView(currentFolder);
 533                 }
 534                 break;
 535
 536             case R.id.create_folder:
 537                 // Show the `CreateBookmarkFolder` `AlertDialog` and name the instance `@string/create_folder`.
 538                 AppCompatDialogFragment createBookmarkFolderDialog = new CreateBookmarkFolder();
 539                 createBookmarkFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_folder));
 540                 break;
 541
 542             case R.id.options_menu_select_all_bookmarks:
 543                 int numberOfBookmarks = bookmarksListView.getCount();
 544
 545                 for (int i = 0; i < numberOfBookmarks; i++) {
 546                     bookmarksListView.setItemChecked(i, true);
 547                 }
 548                 break;
 549
 550             case R.id.bookmarks_database_view:
 551                 // Launch `BookmarksDatabaseView`.
 552                 Intent bookmarksDatabaseViewIntent = new Intent(this, BookmarksDatabaseView.class);
 553                 startActivity(bookmarksDatabaseViewIntent);
 554                 break;
 555         }
 556         return true;
 557     }
 558
 559     @Override
 560     public void onBackPressed() {
 561         if (currentFolder.isEmpty()) {  // Exit Bookmarks if currently in the home folder.
 562             super.onBackPressed();
 563         } else {  // Navigate up one folder.
 564             // Place the former parent folder in `currentFolder`.
 565             currentFolder = bookmarksDatabaseHelper.getParentFolder(currentFolder);
 566
 567             // Reload the `ListView`.
 568             updateBookmarksListView(currentFolder);
 569         }
 570     }
 571
 572     @Override
 573     public void onCreateBookmark(AppCompatDialogFragment dialogFragment) {
 574         // Get the `EditTexts` from the `dialogFragment`.
 575         EditText createBookmarkNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
 576         EditText createBookmarkUrlEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
 577
 578         // Extract the strings from the `EditTexts`.
 579         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
 580         String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
 581
 582         // Convert the favoriteIcon Bitmap to a byte array.
 583         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 584         // `0` is for lossless compression (the only option for a PNG).
 585         MainWebView.favoriteIcon.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
 586         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 587
 588         // Display the new bookmark below the current items in the (0 indexed) list.
 589         int newBookmarkDisplayOrder = bookmarksListView.getCount();
 590
 591         // Create the bookmark.
 592         bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, newBookmarkDisplayOrder, currentFolder, favoriteIconByteArray);
 593
 594         // Refresh the `ListView`.  `setSelection` scrolls to the bottom of the list.
 595         updateBookmarksListView(currentFolder);
 596         bookmarksListView.setSelection(newBookmarkDisplayOrder);
 597     }
 598
 599     @Override
 600     public void onCreateBookmarkFolder(AppCompatDialogFragment dialogFragment) {
 601         // Get `create_folder_name_edit_text` and extract the string.
 602         EditText createFolderNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_folder_name_edittext);
 603         String folderNameString = createFolderNameEditText.getText().toString();
 604
 605         // Check to see if the folder already exists.
 606         Cursor bookmarkFolderCursor = bookmarksDatabaseHelper.getFolderCursor(folderNameString);
 607         int existingFoldersWithNewName = bookmarkFolderCursor.getCount();
 608         bookmarkFolderCursor.close();
 609         if (folderNameString.isEmpty() || (existingFoldersWithNewName > 0)) {
 610             String cannotCreateFolder = getResources().getString(R.string.cannot_create_folder) + " \"" + folderNameString + "\"";
 611             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), cannotCreateFolder, Snackbar.LENGTH_INDEFINITE).show();
 612         } else {  // Create the folder.
 613             // Get the new folder icon `Bitmap`.
 614             RadioButton defaultFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon_radiobutton);
 615             Bitmap folderIconBitmap;
 616             if (defaultFolderIconRadioButton.isChecked()) {
 617                 // Get the default folder icon `ImageView` from the `Dialog` and convert it to a `Bitmap`.
 618                 ImageView folderIconImageView = (ImageView) dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon);
 619                 Drawable folderIconDrawable = folderIconImageView.getDrawable();
 620                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 621                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 622             } else {  // Assign `favoriteIcon` from the `WebView`.
 623                 folderIconBitmap = MainWebView.favoriteIcon;
 624             }
 625
 626             // Convert `folderIconBitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
 627             ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 628             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 629             byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 630
 631             // Move all the bookmarks down one in the display order.
 632             for (int i = 0; i < bookmarksListView.getCount(); i++) {
 633                 int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 634                 bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i + 1);
 635             }
 636
 637             // Create the folder, placing it at the top of the ListView
 638             bookmarksDatabaseHelper.createFolder(folderNameString, 0, currentFolder, folderIconByteArray);
 639
 640             // Refresh the ListView.
 641             updateBookmarksListView(currentFolder);
 642         }
 643     }
 644
 645     @Override
 646     public void onSaveEditBookmark(AppCompatDialogFragment dialogFragment) {
 647         // Get a long array with the the databaseId of the selected bookmark and convert it to an `int`.
 648         long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 649         int selectedBookmarkDatabaseId = (int) selectedBookmarksLongArray[0];
 650
 651         // Get the `EditText`s from the `editBookmarkDialogFragment` and extract the strings.
 652         EditText editBookmarkNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
 653         String bookmarkNameString = editBookmarkNameEditText.getText().toString();
 654         EditText editBookmarkUrlEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
 655         String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
 656
 657         // Get `edit_bookmark_current_icon_radiobutton`.
 658         RadioButton currentBookmarkIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
 659
 660         if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
 661             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
 662         } else {  // Update the bookmark using the `WebView` favorite icon.
 663             ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 664             MainWebView.favoriteIcon.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
 665             byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
 666
 667             //  Update the bookmark and the favorite icon.
 668             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
 669         }
 670
 671         // Close the contextual action mode.
 672         contextualActionMode.finish();
 673
 674         // Refresh the `ListView`.  `setSelection` scrolls to the position of the bookmark that was edited.
 675         updateBookmarksListView(currentFolder);
 676         bookmarksListView.setSelection(selectedBookmarkPosition);
 677     }
 678
 679     @Override
 680     public void onSaveEditBookmarkFolder(AppCompatDialogFragment dialogFragment) {
 681         // Get the new folder name.
 682         EditText editFolderNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
 683         String newFolderNameString = editFolderNameEditText.getText().toString();
 684
 685         // Check to see if the new folder name is unique.
 686         Cursor bookmarkFolderCursor = bookmarksDatabaseHelper.getFolderCursor(newFolderNameString);
 687         int existingFoldersWithNewName = bookmarkFolderCursor.getCount();
 688         bookmarkFolderCursor.close();
 689         if ( ((existingFoldersWithNewName == 0) || newFolderNameString.equals(oldFolderNameString)) && !newFolderNameString.isEmpty()) {
 690             // Get a long array with the the database ID of the selected folder and convert it to an `int`.
 691             long[] selectedFolderLongArray = bookmarksListView.getCheckedItemIds();
 692             int selectedFolderDatabaseId = (int) selectedFolderLongArray[0];
 693
 694             // Get the `RadioButtons` from the `Dialog`.
 695             RadioButton currentFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
 696             RadioButton defaultFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
 697
 698             // Check if the favorite icon has changed.
 699             if (currentFolderIconRadioButton.isChecked()) {
 700                 // Update the folder name if it has changed without modifying the favorite icon.
 701                 if (!newFolderNameString.equals(oldFolderNameString)) {
 702                     bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
 703
 704                     // Refresh the `ListView`.  `setSelection` scrolls to the position of the folder that was edited.
 705                     updateBookmarksListView(currentFolder);
 706                     bookmarksListView.setSelection(selectedBookmarkPosition);
 707                 }
 708             } else {  // Update the folder icon.
 709                 // Get the new folder icon `Bitmap`.
 710                 Bitmap folderIconBitmap;
 711                 if (defaultFolderIconRadioButton.isChecked()) {
 712                     // Get the default folder icon `ImageView` from the `Drawable` and convert it to a `Bitmap`.
 713                     ImageView folderIconImageView = (ImageView) dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon);
 714                     Drawable folderIconDrawable = folderIconImageView.getDrawable();
 715                     BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 716                     folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 717                 } else {  // Get the web page icon `ImageView` from the `Dialog`.
 718                     folderIconBitmap = MainWebView.favoriteIcon;
 719                 }
 720
 721                 // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
 722                 ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 723                 folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 724                 byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 725
 726                 bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, folderIconByteArray);
 727
 728                 // Refresh the `ListView`.  `setSelection` scrolls to the position of the folder that was edited.
 729                 updateBookmarksListView(currentFolder);
 730                 bookmarksListView.setSelection(selectedBookmarkPosition);
 731             }
 732         } else {  // Don't edit the folder because the new name is not unique.
 733             String cannot_rename_folder = getResources().getString(R.string.cannot_save_folder) + " \"" + newFolderNameString + "\"";
 734             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), cannot_rename_folder, Snackbar.LENGTH_INDEFINITE).show();
 735         }
 736
 737         // Close the contextual action mode.
 738         contextualActionMode.finish();
 739     }
 740
 741     @Override
 742     public void onMoveToFolder(AppCompatDialogFragment dialogFragment) {
 743         // Get the new folder database id.
 744         ListView folderListView = (ListView) dialogFragment.getDialog().findViewById(R.id.move_to_folder_listview);
 745         long[] newFolderLongArray = folderListView.getCheckedItemIds();
 746
 747         if (newFolderLongArray.length == 0) {  // No new folder was selected.
 748             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), getString(R.string.cannot_move_bookmarks), Snackbar.LENGTH_INDEFINITE).show();
 749         } else {  // Move the selected bookmarks.
 750             // Get the new folder database ID.
 751             int newFolderDatabaseId = (int) newFolderLongArray[0];
 752
 753             // Instantiate `newFolderName`.
 754             String newFolderName;
 755
 756             if (newFolderDatabaseId == 0) {
 757                 // The new folder is the home folder, represented as `""` in the database.
 758                 newFolderName = "";
 759             } else {
 760                 // Get the new folder name from the database.
 761                 newFolderName = bookmarksDatabaseHelper.getFolderName(newFolderDatabaseId);
 762             }
 763
 764             // Get a long array with the the database ID of the selected bookmarks.
 765             long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 766             for (long databaseIdLong : selectedBookmarksLongArray) {
 767                 // Get `databaseIdInt` for each selected bookmark.
 768                 int databaseIdInt = (int) databaseIdLong;
 769
 770                 // Move the selected bookmark to the new folder.
 771                 bookmarksDatabaseHelper.moveToFolder(databaseIdInt, newFolderName);
 772             }
 773
 774             // Refresh the `ListView`.
 775             updateBookmarksListView(currentFolder);
 776
 777             // Close the contextual app bar.
 778             contextualActionMode.finish();
 779         }
 780     }
 781
 782     private void updateBookmarksListView(String folderName) {
 783         // Get a `Cursor` with the current contents of the bookmarks database.
 784         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(folderName);
 785
 786         // Setup `bookmarksCursorAdapter` with `this` context.  `false` disables `autoRequery`.
 787         CursorAdapter bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
 788             @Override
 789             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 790                 // Inflate the individual item layout.  `false` does not attach it to the root.
 791                 return getLayoutInflater().inflate(R.layout.bookmarks_item_linearlayout, parent, false);
 792             }
 793
 794             @Override
 795             public void bindView(View view, Context context, Cursor cursor) {
 796                 // Get the favorite icon byte array from the `Cursor`.
 797                 byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
 798
 799                 // Convert the byte array to a `Bitmap` beginning at the first byte and ending at the last.
 800                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
 801
 802                 // Display the bitmap in `bookmarkFavoriteIcon`.
 803                 ImageView bookmarkFavoriteIcon = (ImageView) view.findViewById(R.id.bookmark_favorite_icon);
 804                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
 805
 806
 807                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
 808                 String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 809                 TextView bookmarkNameTextView = (TextView) view.findViewById(R.id.bookmark_name);
 810                 bookmarkNameTextView.setText(bookmarkNameString);
 811
 812                 // Make the font bold for folders.
 813                 if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
 814                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT_BOLD);
 815                 } else {  // Reset the font to default for normal bookmarks.
 816                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
 817                 }
 818             }
 819         };
 820
 821         // Update the ListView.
 822         bookmarksListView.setAdapter(bookmarksCursorAdapter);
 823
 824         // Set the AppBar title.
 825         if (currentFolder.isEmpty()) {
 826             appBar.setTitle(R.string.bookmarks);
 827         } else {
 828             appBar.setTitle(currentFolder);
 829         }
 830     }
 831
 832     private void updateBookmarksListViewExcept(long[] exceptIdLongArray, String folderName) {
 833         // Get a `Cursor` with the current contents of the bookmarks database except for the specified database IDs.
 834         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksCursorExcept(exceptIdLongArray, folderName);
 835
 836         // Setup `bookmarksCursorAdapter` with `this` context.  `false` disables autoRequery.
 837         CursorAdapter bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
 838             @Override
 839             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 840                 // Inflate the individual item layout.  `false` does not attach it to the root.
 841                 return getLayoutInflater().inflate(R.layout.bookmarks_item_linearlayout, parent, false);
 842             }
 843
 844             @Override
 845             public void bindView(View view, Context context, Cursor cursor) {
 846                 // Get the favorite icon byte array from the cursor.
 847                 byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
 848
 849                 // Convert the byte array to a Bitmap beginning at the first byte and ending at the last.
 850                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
 851
 852                 // Display the bitmap in `bookmarkFavoriteIcon`.
 853                 ImageView bookmarkFavoriteIcon = (ImageView) view.findViewById(R.id.bookmark_favorite_icon);
 854                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
 855
 856
 857                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
 858                 String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 859                 TextView bookmarkNameTextView = (TextView) view.findViewById(R.id.bookmark_name);
 860                 bookmarkNameTextView.setText(bookmarkNameString);
 861
 862                 // Make the font bold for folders.
 863                 if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
 864                     // The first argument is `null` because we don't want to change the font.
 865                     bookmarkNameTextView.setTypeface(null, Typeface.BOLD);
 866                 } else {  // Reset the font to default.
 867                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
 868                 }
 869             }
 870         };
 871
 872         // Update the `ListView`.
 873         bookmarksListView.setAdapter(bookmarksCursorAdapter);
 874     }
 875
 876     private void deleteBookmarkFolderContents(int databaseId) {
 877         // Get the name of the folder.
 878         String folderName = bookmarksDatabaseHelper.getFolderName(databaseId);
 879
 880         // Get the contents of the folder.
 881         Cursor folderCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(folderName);
 882
 883         for (int i = 0; i < folderCursor.getCount(); i++) {
 884             // Move `folderCursor` to the current row.
 885             folderCursor.moveToPosition(i);
 886
 887             // Get the database ID of the item.
 888             int itemDatabaseId = folderCursor.getInt(folderCursor.getColumnIndex(BookmarksDatabaseHelper._ID));
 889
 890             // If this is a folder, delete the contents first.
 891             if (bookmarksDatabaseHelper.isFolder(itemDatabaseId)) {
 892                 deleteBookmarkFolderContents(itemDatabaseId);
 893             }
 894
 895             bookmarksDatabaseHelper.deleteBookmark(itemDatabaseId);
 896         }
 897     }
 898 }