app/src/main/java/com/stoutner/privacybrowser/activities/BookmarksActivity.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.CreateBookmarkDialog;
  55 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
  56 import com.stoutner.privacybrowser.dialogs.EditBookmarkDialog;
  57 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
  58 import com.stoutner.privacybrowser.dialogs.MoveToFolderDialog;
  59 import com.stoutner.privacybrowser.R;
  60 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
  61
  62 import java.io.ByteArrayOutputStream;
  63
  64 public class BookmarksActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener, EditBookmarkDialog.EditBookmarkListener, EditBookmarkFolderDialog.EditBookmarkFolderListener,
  65         MoveToFolderDialog.MoveToFolderListener {
  66
  67     // `bookmarksDatabaseHelper` is public static so it can be accessed from `EditBookmarkDialog` and `MoveToFolderDialog`.  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 `MoveToFolderDialog`.
  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 `EditBookmarkDialog`, `EditBookmarkFolderDialog`, and `MoveToFolderDialog`.
  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 `BookmarksActivity` closes.
 145                     MainWebViewActivity.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                         // Scroll `bookmarksListView` to five items above `selectedBookmarkNewPosition`.
 311                         bookmarksListView.setSelection(selectedBookmarkNewPosition - 5);
 312
 313                         break;
 314
 315                     case R.id.move_bookmark_down:
 316                         // Get the selected bookmark database ID.
 317                         selectedBookmarkLongArray = bookmarksListView.getCheckedItemIds();
 318                         selectedBookmarkDatabaseId = (int) selectedBookmarkLongArray[0];
 319
 320                         // Initialize `selectedBookmarkNewPosition`.
 321                         selectedBookmarkNewPosition = 0;
 322
 323                         for (int i = 0; i <bookmarksListView.getCount(); i++) {
 324                             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 325                             int previousBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i - 1);
 326
 327                             if (databaseId == selectedBookmarkDatabaseId || previousBookmarkDatabaseId == selectedBookmarkDatabaseId) {
 328                                 if (databaseId == selectedBookmarkDatabaseId) {
 329                                     // Move the selected bookmark down one and store the new bookmark position.
 330                                     bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i + 1);
 331                                     selectedBookmarkNewPosition = i + 1;
 332                                 } else {  // Move the bookmark below the selected bookmark up one.
 333                                     bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i - 1);
 334                                 }
 335                             } else {
 336                                 // Reset the rest of the bookmark' DISPLAY_ORDER to match the position in the ListView.
 337                                 // This isn't necessary, but it clears out any stray values that might have crept into the database.
 338                                 bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i);
 339                             }
 340                         }
 341
 342                         // Refresh the ListView.
 343                         updateBookmarksListView(currentFolder);
 344
 345                         // Select the previously selected bookmark in the new location.
 346                         bookmarksListView.setItemChecked(selectedBookmarkNewPosition, true);
 347
 348                         // Scroll `bookmarksListView` to five items above `selectedBookmarkNewPosition`.
 349                         bookmarksListView.setSelection(selectedBookmarkNewPosition - 5);
 350                         break;
 351
 352                     case R.id.move_to_folder:
 353                         // Store `checkedItemIds` for use by the `AlertDialog`.
 354                         checkedItemIds = bookmarksListView.getCheckedItemIds();
 355
 356                         // Show the `MoveToFolderDialog` `AlertDialog` and name the instance `@string/move_to_folder
 357                         AppCompatDialogFragment moveToFolderDialog = new MoveToFolderDialog();
 358                         moveToFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.move_to_folder));
 359                         break;
 360
 361                     case R.id.edit_bookmark:
 362                         // Get a handle for `selectedBookmarkPosition` so we can scroll to it after refreshing the ListView.
 363                         bookmarkPositionSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 364                         for (int i = 0; i < bookmarkPositionSparseBooleanArray.size(); i++) {
 365                             // Find the bookmark that is selected and save the position to `selectedBookmarkPosition`.
 366                             if (bookmarkPositionSparseBooleanArray.valueAt(i))
 367                                 selectedBookmarkPosition = bookmarkPositionSparseBooleanArray.keyAt(i);
 368                         }
 369
 370                         // Move to the selected database ID and find out if it is a folder.
 371                         bookmarksCursor.moveToPosition(selectedBookmarkPosition);
 372                         boolean isFolder = (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1);
 373
 374                         // Store `checkedItemIds` for use by the `AlertDialog`.
 375                         checkedItemIds = bookmarksListView.getCheckedItemIds();
 376
 377                         if (isFolder) {
 378                             // Save the current folder name.
 379                             oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 380
 381                             // Show the `EditBookmarkFolderDialog` `AlertDialog` and name the instance `@string/edit_folder`.
 382                             AppCompatDialogFragment editFolderDialog = new EditBookmarkFolderDialog();
 383                             editFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_folder));
 384                         } else {
 385                             // Show the `EditBookmarkDialog` `AlertDialog` and name the instance `@string/edit_bookmark`.
 386                             AppCompatDialogFragment editBookmarkDialog = new EditBookmarkDialog();
 387                             editBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_bookmark));
 388                         }
 389                         break;
 390
 391                     case R.id.delete_bookmark:
 392                         // Get an array of the selected rows.
 393                         final long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 394
 395                         // Get a handle for `selectedBookmarkPosition` so we can scroll to it after refreshing the ListView.
 396                         bookmarkPositionSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 397                         for (int i = 0; i < bookmarkPositionSparseBooleanArray.size(); i++) {
 398                             // Find the bookmark that is selected and save the position to `selectedBookmarkPosition`.
 399                             if (bookmarkPositionSparseBooleanArray.valueAt(i))
 400                                 selectedBookmarkPosition = bookmarkPositionSparseBooleanArray.keyAt(i);
 401                         }
 402
 403                         updateBookmarksListViewExcept(selectedBookmarksLongArray, currentFolder);
 404
 405                         // Scroll to where the deleted bookmark was located.
 406                         bookmarksListView.setSelection(selectedBookmarkPosition - 5);
 407
 408                         String snackbarMessage;
 409
 410                         // Determine how many items are in the array and prepare an appropriate Snackbar message.
 411                         if (selectedBookmarksLongArray.length == 1) {
 412                             snackbarMessage = getString(R.string.one_bookmark_deleted);
 413                         } else {
 414                             snackbarMessage = selectedBookmarksLongArray.length + " " + getString(R.string.bookmarks_deleted);
 415                         }
 416
 417                         // Show a SnackBar.
 418                         Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), snackbarMessage, Snackbar.LENGTH_LONG)
 419                                 .setAction(R.string.undo, new View.OnClickListener() {
 420                                     @Override
 421                                     public void onClick(View view) {
 422                                         // Do nothing because everything will be handled by `onDismissed()` below.
 423                                     }
 424                                 })
 425                                 .addCallback(new Snackbar.Callback() {
 426                                     @Override
 427                                     public void onDismissed(Snackbar snackbar, int event) {
 428                                         // Android Studio wants to see entries for every possible `Snackbar.Callback` even if they aren't used.
 429                                         switch (event) {
 430                                             // The user pushed the "Undo" button.
 431                                             case Snackbar.Callback.DISMISS_EVENT_ACTION:
 432                                                 // Refresh the ListView to show the rows again.
 433                                                 updateBookmarksListView(currentFolder);
 434
 435                                                 // Scroll to where the deleted bookmark was located.
 436                                                 bookmarksListView.setSelection(selectedBookmarkPosition - 5);
 437
 438                                                 break;
 439
 440                                             case Snackbar.Callback.DISMISS_EVENT_CONSECUTIVE:
 441                                                 // Do nothing and let the default behavior run.
 442
 443                                             case Snackbar.Callback.DISMISS_EVENT_MANUAL:
 444                                                 // Do nothing and let the default behavior run.
 445
 446                                             case Snackbar.Callback.DISMISS_EVENT_SWIPE:
 447                                                 // Do nothing and let the default behavior run.
 448
 449                                             case Snackbar.Callback.DISMISS_EVENT_TIMEOUT:
 450                                                 // Do nothing and let the default behavior run.
 451
 452                                             // The Snackbar was dismissed without the "Undo" button being pushed.
 453                                             default:
 454                                                 // Delete each selected row.
 455                                                 for (long databaseIdLong : selectedBookmarksLongArray) {
 456                                                     // Convert `databaseIdLong` to an int.
 457                                                     int databaseIdInt = (int) databaseIdLong;
 458
 459                                                     if (bookmarksDatabaseHelper.isFolder(databaseIdInt)) {
 460                                                         deleteBookmarkFolderContents(databaseIdInt);
 461                                                     }
 462
 463                                                     // Delete `databaseIdInt`.
 464                                                     bookmarksDatabaseHelper.deleteBookmark(databaseIdInt);
 465                                                 }
 466                                                 break;
 467                                         }
 468                                     }
 469                                 })
 470                                 .show();
 471
 472                         // Close the contextual app bar.
 473                         mode.finish();
 474                         break;
 475
 476                     case R.id.context_menu_select_all_bookmarks:
 477                         numberOfBookmarks = bookmarksListView.getCount();
 478
 479                         for (int i = 0; i < numberOfBookmarks; i++) {
 480                             bookmarksListView.setItemChecked(i, true);
 481                         }
 482                         break;
 483                 }
 484                 // Consume the click.
 485                 return true;
 486             }
 487
 488             @Override
 489             public void onDestroyActionMode(ActionMode mode) {
 490
 491             }
 492         });
 493
 494         // Set a FloatingActionButton for creating new bookmarks.
 495         FloatingActionButton createBookmarkFAB = (FloatingActionButton) findViewById(R.id.create_bookmark_fab);
 496         createBookmarkFAB.setOnClickListener(new View.OnClickListener() {
 497             @Override
 498             public void onClick(View view) {
 499                 // Show the `CreateBookmarkDialog` `AlertDialog` and name the instance `@string/create_bookmark`.
 500                 AppCompatDialogFragment createBookmarkDialog = new CreateBookmarkDialog();
 501                 createBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_bookmark));
 502             }
 503         });
 504     }
 505
 506     @Override
 507     public boolean onCreateOptionsMenu(Menu menu) {
 508         //Inflate the menu.
 509         getMenuInflater().inflate(R.menu.bookmarks_options_menu, menu);
 510
 511         return true;
 512     }
 513
 514     @Override
 515     public boolean onPrepareOptionsMenu(Menu menu) {
 516         super.onPrepareOptionsMenu(menu);
 517
 518         return true;
 519     }
 520
 521     @Override
 522     public boolean onOptionsItemSelected(MenuItem menuItem) {
 523         int menuItemId = menuItem.getItemId();
 524
 525         switch (menuItemId) {
 526             case android.R.id.home:
 527                 if (currentFolder.isEmpty()) {  // Exit BookmarksActivity if currently in the home folder.
 528                     NavUtils.navigateUpFromSameTask(this);
 529                 } else {  // Navigate up one folder.
 530                     // Place the former parent folder in `currentFolder`.
 531                     currentFolder = bookmarksDatabaseHelper.getParentFolder(currentFolder);
 532
 533                     // Exit BookmarksActivity if currently in the home folder.
 534                     updateBookmarksListView(currentFolder);
 535                 }
 536                 break;
 537
 538             case R.id.create_folder:
 539                 // Show the `CreateBookmarkFolderDialog` `AlertDialog` and name the instance `@string/create_folder`.
 540                 AppCompatDialogFragment createBookmarkFolderDialog = new CreateBookmarkFolderDialog();
 541                 createBookmarkFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_folder));
 542                 break;
 543
 544             case R.id.options_menu_select_all_bookmarks:
 545                 int numberOfBookmarks = bookmarksListView.getCount();
 546
 547                 for (int i = 0; i < numberOfBookmarks; i++) {
 548                     bookmarksListView.setItemChecked(i, true);
 549                 }
 550                 break;
 551
 552             case R.id.bookmarks_database_view:
 553                 // Launch `BookmarksDatabaseViewActivity`.
 554                 Intent bookmarksDatabaseViewIntent = new Intent(this, BookmarksDatabaseViewActivity.class);
 555                 startActivity(bookmarksDatabaseViewIntent);
 556                 break;
 557         }
 558         return true;
 559     }
 560
 561     @Override
 562     public void onBackPressed() {
 563         if (currentFolder.isEmpty()) {  // Exit BookmarksActivity if currently in the home folder.
 564             super.onBackPressed();
 565         } else {  // Navigate up one folder.
 566             // Place the former parent folder in `currentFolder`.
 567             currentFolder = bookmarksDatabaseHelper.getParentFolder(currentFolder);
 568
 569             // Reload the `ListView`.
 570             updateBookmarksListView(currentFolder);
 571         }
 572     }
 573
 574     @Override
 575     public void onCreateBookmark(AppCompatDialogFragment dialogFragment) {
 576         // Get the `EditTexts` from the `dialogFragment`.
 577         EditText createBookmarkNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
 578         EditText createBookmarkUrlEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
 579
 580         // Extract the strings from the `EditTexts`.
 581         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
 582         String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
 583
 584         // Convert the favoriteIcon Bitmap to a byte array.
 585         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 586         // `0` is for lossless compression (the only option for a PNG).
 587         MainWebViewActivity.favoriteIcon.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
 588         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 589
 590         // Display the new bookmark below the current items in the (0 indexed) list.
 591         int newBookmarkDisplayOrder = bookmarksListView.getCount();
 592
 593         // Create the bookmark.
 594         bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, newBookmarkDisplayOrder, currentFolder, favoriteIconByteArray);
 595
 596         // Refresh the `ListView`.  `setSelection` scrolls to the bottom of the list.
 597         updateBookmarksListView(currentFolder);
 598         bookmarksListView.setSelection(newBookmarkDisplayOrder);
 599     }
 600
 601     @Override
 602     public void onCreateBookmarkFolder(AppCompatDialogFragment dialogFragment) {
 603         // Get `create_folder_name_edit_text` and extract the string.
 604         EditText createFolderNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_folder_name_edittext);
 605         String folderNameString = createFolderNameEditText.getText().toString();
 606
 607         // Check to see if the folder already exists.
 608         Cursor bookmarkFolderCursor = bookmarksDatabaseHelper.getFolderCursor(folderNameString);
 609         int existingFoldersWithNewName = bookmarkFolderCursor.getCount();
 610         bookmarkFolderCursor.close();
 611         if (folderNameString.isEmpty() || (existingFoldersWithNewName > 0)) {
 612             String cannotCreateFolder = getResources().getString(R.string.cannot_create_folder) + " \"" + folderNameString + "\"";
 613             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), cannotCreateFolder, Snackbar.LENGTH_INDEFINITE).show();
 614         } else {  // Create the folder.
 615             // Get the new folder icon `Bitmap`.
 616             RadioButton defaultFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon_radiobutton);
 617             Bitmap folderIconBitmap;
 618             if (defaultFolderIconRadioButton.isChecked()) {
 619                 // Get the default folder icon `ImageView` from the `Dialog` and convert it to a `Bitmap`.
 620                 ImageView folderIconImageView = (ImageView) dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon);
 621                 Drawable folderIconDrawable = folderIconImageView.getDrawable();
 622                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 623                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 624             } else {  // Assign `favoriteIcon` from the `WebView`.
 625                 folderIconBitmap = MainWebViewActivity.favoriteIcon;
 626             }
 627
 628             // Convert `folderIconBitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
 629             ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 630             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 631             byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 632
 633             // Move all the bookmarks down one in the display order.
 634             for (int i = 0; i < bookmarksListView.getCount(); i++) {
 635                 int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 636                 bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i + 1);
 637             }
 638
 639             // Create the folder, placing it at the top of the ListView
 640             bookmarksDatabaseHelper.createFolder(folderNameString, 0, currentFolder, folderIconByteArray);
 641
 642             // Refresh the ListView.
 643             updateBookmarksListView(currentFolder);
 644         }
 645     }
 646
 647     @Override
 648     public void onSaveEditBookmark(AppCompatDialogFragment dialogFragment) {
 649         // Get a long array with the the databaseId of the selected bookmark and convert it to an `int`.
 650         long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 651         int selectedBookmarkDatabaseId = (int) selectedBookmarksLongArray[0];
 652
 653         // Get the `EditText`s from the `editBookmarkDialogFragment` and extract the strings.
 654         EditText editBookmarkNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
 655         String bookmarkNameString = editBookmarkNameEditText.getText().toString();
 656         EditText editBookmarkUrlEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
 657         String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
 658
 659         // Get `edit_bookmark_current_icon_radiobutton`.
 660         RadioButton currentBookmarkIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
 661
 662         if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
 663             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
 664         } else {  // Update the bookmark using the `WebView` favorite icon.
 665             ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 666             MainWebViewActivity.favoriteIcon.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
 667             byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
 668
 669             //  Update the bookmark and the favorite icon.
 670             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
 671         }
 672
 673         // Close the contextual action mode.
 674         contextualActionMode.finish();
 675
 676         // Refresh the `ListView`.  `setSelection` scrolls to the position of the bookmark that was edited.
 677         updateBookmarksListView(currentFolder);
 678         bookmarksListView.setSelection(selectedBookmarkPosition);
 679     }
 680
 681     @Override
 682     public void onSaveEditBookmarkFolder(AppCompatDialogFragment dialogFragment) {
 683         // Get the new folder name.
 684         EditText editFolderNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
 685         String newFolderNameString = editFolderNameEditText.getText().toString();
 686
 687         // Check to see if the new folder name is unique.
 688         Cursor bookmarkFolderCursor = bookmarksDatabaseHelper.getFolderCursor(newFolderNameString);
 689         int existingFoldersWithNewName = bookmarkFolderCursor.getCount();
 690         bookmarkFolderCursor.close();
 691         if ( ((existingFoldersWithNewName == 0) || newFolderNameString.equals(oldFolderNameString)) && !newFolderNameString.isEmpty()) {
 692             // Get a long array with the the database ID of the selected folder and convert it to an `int`.
 693             long[] selectedFolderLongArray = bookmarksListView.getCheckedItemIds();
 694             int selectedFolderDatabaseId = (int) selectedFolderLongArray[0];
 695
 696             // Get the `RadioButtons` from the `Dialog`.
 697             RadioButton currentFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
 698             RadioButton defaultFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
 699
 700             // Check if the favorite icon has changed.
 701             if (currentFolderIconRadioButton.isChecked()) {
 702                 // Update the folder name if it has changed without modifying the favorite icon.
 703                 if (!newFolderNameString.equals(oldFolderNameString)) {
 704                     bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
 705
 706                     // Refresh the `ListView`.  `setSelection` scrolls to the position of the folder that was edited.
 707                     updateBookmarksListView(currentFolder);
 708                     bookmarksListView.setSelection(selectedBookmarkPosition);
 709                 }
 710             } else {  // Update the folder icon.
 711                 // Get the new folder icon `Bitmap`.
 712                 Bitmap folderIconBitmap;
 713                 if (defaultFolderIconRadioButton.isChecked()) {
 714                     // Get the default folder icon `ImageView` from the `Drawable` and convert it to a `Bitmap`.
 715                     ImageView folderIconImageView = (ImageView) dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon);
 716                     Drawable folderIconDrawable = folderIconImageView.getDrawable();
 717                     BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 718                     folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 719                 } else {  // Get the web page icon `ImageView` from the `Dialog`.
 720                     folderIconBitmap = MainWebViewActivity.favoriteIcon;
 721                 }
 722
 723                 // Convert the folder `Bitmap` 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                 bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, folderIconByteArray);
 729
 730                 // Refresh the `ListView`.  `setSelection` scrolls to the position of the folder that was edited.
 731                 updateBookmarksListView(currentFolder);
 732                 bookmarksListView.setSelection(selectedBookmarkPosition);
 733             }
 734         } else {  // Don't edit the folder because the new name is not unique.
 735             String cannot_rename_folder = getResources().getString(R.string.cannot_save_folder) + " \"" + newFolderNameString + "\"";
 736             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), cannot_rename_folder, Snackbar.LENGTH_INDEFINITE).show();
 737         }
 738
 739         // Close the contextual action mode.
 740         contextualActionMode.finish();
 741     }
 742
 743     @Override
 744     public void onMoveToFolder(AppCompatDialogFragment dialogFragment) {
 745         // Get the new folder database id.
 746         ListView folderListView = (ListView) dialogFragment.getDialog().findViewById(R.id.move_to_folder_listview);
 747         long[] newFolderLongArray = folderListView.getCheckedItemIds();
 748
 749         if (newFolderLongArray.length == 0) {  // No new folder was selected.
 750             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), getString(R.string.cannot_move_bookmarks), Snackbar.LENGTH_INDEFINITE).show();
 751         } else {  // Move the selected bookmarks.
 752             // Get the new folder database ID.
 753             int newFolderDatabaseId = (int) newFolderLongArray[0];
 754
 755             // Instantiate `newFolderName`.
 756             String newFolderName;
 757
 758             if (newFolderDatabaseId == 0) {
 759                 // The new folder is the home folder, represented as `""` in the database.
 760                 newFolderName = "";
 761             } else {
 762                 // Get the new folder name from the database.
 763                 newFolderName = bookmarksDatabaseHelper.getFolderName(newFolderDatabaseId);
 764             }
 765
 766             // Get a long array with the the database ID of the selected bookmarks.
 767             long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 768             for (long databaseIdLong : selectedBookmarksLongArray) {
 769                 // Get `databaseIdInt` for each selected bookmark.
 770                 int databaseIdInt = (int) databaseIdLong;
 771
 772                 // Move the selected bookmark to the new folder.
 773                 bookmarksDatabaseHelper.moveToFolder(databaseIdInt, newFolderName);
 774             }
 775
 776             // Refresh the `ListView`.
 777             updateBookmarksListView(currentFolder);
 778
 779             // Close the contextual app bar.
 780             contextualActionMode.finish();
 781         }
 782     }
 783
 784     private void updateBookmarksListView(String folderName) {
 785         // Get a `Cursor` with the current contents of the bookmarks database.
 786         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(folderName);
 787
 788         // Setup `bookmarksCursorAdapter` with `this` context.  `false` disables `autoRequery`.
 789         CursorAdapter bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
 790             @Override
 791             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 792                 // Inflate the individual item layout.  `false` does not attach it to the root.
 793                 return getLayoutInflater().inflate(R.layout.bookmarks_item_linearlayout, parent, false);
 794             }
 795
 796             @Override
 797             public void bindView(View view, Context context, Cursor cursor) {
 798                 // Get the favorite icon byte array from the `Cursor`.
 799                 byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
 800
 801                 // Convert the byte array to a `Bitmap` beginning at the first byte and ending at the last.
 802                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
 803
 804                 // Display the bitmap in `bookmarkFavoriteIcon`.
 805                 ImageView bookmarkFavoriteIcon = (ImageView) view.findViewById(R.id.bookmark_favorite_icon);
 806                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
 807
 808
 809                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
 810                 String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 811                 TextView bookmarkNameTextView = (TextView) view.findViewById(R.id.bookmark_name);
 812                 bookmarkNameTextView.setText(bookmarkNameString);
 813
 814                 // Make the font bold for folders.
 815                 if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
 816                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT_BOLD);
 817                 } else {  // Reset the font to default for normal bookmarks.
 818                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
 819                 }
 820             }
 821         };
 822
 823         // Update the ListView.
 824         bookmarksListView.setAdapter(bookmarksCursorAdapter);
 825
 826         // Set the AppBar title.
 827         if (currentFolder.isEmpty()) {
 828             appBar.setTitle(R.string.bookmarks);
 829         } else {
 830             appBar.setTitle(currentFolder);
 831         }
 832     }
 833
 834     private void updateBookmarksListViewExcept(long[] exceptIdLongArray, String folderName) {
 835         // Get a `Cursor` with the current contents of the bookmarks database except for the specified database IDs.
 836         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksCursorExcept(exceptIdLongArray, folderName);
 837
 838         // Setup `bookmarksCursorAdapter` with `this` context.  `false` disables autoRequery.
 839         CursorAdapter bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
 840             @Override
 841             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 842                 // Inflate the individual item layout.  `false` does not attach it to the root.
 843                 return getLayoutInflater().inflate(R.layout.bookmarks_item_linearlayout, parent, false);
 844             }
 845
 846             @Override
 847             public void bindView(View view, Context context, Cursor cursor) {
 848                 // Get the favorite icon byte array from the cursor.
 849                 byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
 850
 851                 // Convert the byte array to a Bitmap beginning at the first byte and ending at the last.
 852                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
 853
 854                 // Display the bitmap in `bookmarkFavoriteIcon`.
 855                 ImageView bookmarkFavoriteIcon = (ImageView) view.findViewById(R.id.bookmark_favorite_icon);
 856                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
 857
 858
 859                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
 860                 String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 861                 TextView bookmarkNameTextView = (TextView) view.findViewById(R.id.bookmark_name);
 862                 bookmarkNameTextView.setText(bookmarkNameString);
 863
 864                 // Make the font bold for folders.
 865                 if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
 866                     // The first argument is `null` because we don't want to change the font.
 867                     bookmarkNameTextView.setTypeface(null, Typeface.BOLD);
 868                 } else {  // Reset the font to default.
 869                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
 870                 }
 871             }
 872         };
 873
 874         // Update the `ListView`.
 875         bookmarksListView.setAdapter(bookmarksCursorAdapter);
 876     }
 877
 878     private void deleteBookmarkFolderContents(int databaseId) {
 879         // Get the name of the folder.
 880         String folderName = bookmarksDatabaseHelper.getFolderName(databaseId);
 881
 882         // Get the contents of the folder.
 883         Cursor folderCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(folderName);
 884
 885         for (int i = 0; i < folderCursor.getCount(); i++) {
 886             // Move `folderCursor` to the current row.
 887             folderCursor.moveToPosition(i);
 888
 889             // Get the database ID of the item.
 890             int itemDatabaseId = folderCursor.getInt(folderCursor.getColumnIndex(BookmarksDatabaseHelper._ID));
 891
 892             // If this is a folder, delete the contents first.
 893             if (bookmarksDatabaseHelper.isFolder(itemDatabaseId)) {
 894                 deleteBookmarkFolderContents(itemDatabaseId);
 895             }
 896
 897             bookmarksDatabaseHelper.deleteBookmark(itemDatabaseId);
 898         }
 899     }
 900 }