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

   1 /*
   2  * Copyright © 2016-2019 Soren Stoutner <soren@stoutner.com>.
   3  *
   4  * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
   5  *
   6  * Privacy Browser is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Privacy Browser is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 package com.stoutner.privacybrowser.activities;
  21
  22 import android.annotation.SuppressLint;
  23 import android.app.Activity;
  24 import android.content.Context;
  25 import android.content.Intent;
  26 import android.database.Cursor;
  27 import android.graphics.Bitmap;
  28 import android.graphics.BitmapFactory;
  29 import android.graphics.Typeface;
  30 import android.graphics.drawable.BitmapDrawable;
  31 import android.graphics.drawable.Drawable;
  32 import android.os.Bundle;
  33 import android.util.SparseBooleanArray;
  34 import android.view.ActionMode;
  35 import android.view.Menu;
  36 import android.view.MenuItem;
  37 import android.view.View;
  38 import android.view.ViewGroup;
  39 import android.view.WindowManager;
  40 import android.widget.AbsListView;
  41 import android.widget.CursorAdapter;
  42 import android.widget.EditText;
  43 import android.widget.ImageView;
  44 import android.widget.ListView;
  45 import android.widget.RadioButton;
  46 import android.widget.TextView;
  47
  48 import androidx.appcompat.app.ActionBar;
  49 import androidx.appcompat.app.AppCompatActivity;
  50 import androidx.appcompat.widget.Toolbar;  // The AndroidX toolbar must be used until the minimum API is >= 21.
  51 import androidx.core.app.NavUtils;
  52 import androidx.fragment.app.DialogFragment;
  53
  54 import com.google.android.material.floatingactionbutton.FloatingActionButton;
  55 import com.google.android.material.snackbar.Snackbar;
  56
  57 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
  58 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
  59 import com.stoutner.privacybrowser.dialogs.EditBookmarkDialog;
  60 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
  61 import com.stoutner.privacybrowser.dialogs.MoveToFolderDialog;
  62 import com.stoutner.privacybrowser.R;
  63 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
  64
  65 import java.io.ByteArrayOutputStream;
  66
  67 public class BookmarksActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener, EditBookmarkDialog.EditBookmarkListener,
  68         EditBookmarkFolderDialog.EditBookmarkFolderListener, MoveToFolderDialog.MoveToFolderListener {
  69
  70     // `currentFolder` is public static so it can be accessed from `MoveToFolderDialog` and `BookmarksDatabaseViewActivity`.
  71     // It is used in `onCreate`, `onOptionsItemSelected()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`,
  72     // and `loadFolder()`.
  73     public static String currentFolder;
  74
  75     // `checkedItemIds` is public static so it can be accessed from `MoveToFolderDialog`.  It is also used in `onCreate()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`,
  76     // and `updateMoveIcons()`.
  77     public static long[] checkedItemIds;
  78
  79     // `restartFromBookmarksDatabaseViewActivity` is public static so it can be accessed from `BookmarksDatabaseViewActivity`.  It is also used in `onRestart()`.
  80     public static boolean restartFromBookmarksDatabaseViewActivity;
  81
  82     //  The current WebView strings are public static so they can be updated from `MainWebViewActivity`.  They are use in `onCreate()`.
  83     public static String currentWebViewUrl;
  84     public static String currentWebViewTitle;
  85
  86
  87     // `bookmarksDatabaseHelper` is used in `onCreate()`, `onOptionsItemSelected()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`,
  88     // `onMoveToFolder()`, `deleteBookmarkFolderContents()`, `loadFolder()`, and `onDestroy()`.
  89     private BookmarksDatabaseHelper bookmarksDatabaseHelper;
  90
  91     // `bookmarksListView` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`,
  92     // `updateMoveIcons()`, `scrollBookmarks()`, and `loadFolder()`.
  93     private ListView bookmarksListView;
  94
  95     // `bookmarksCursor` is used in `onCreate()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`, `deleteBookmarkFolderContents()`,
  96     // `loadFolder()`, and `onDestroy()`.
  97     private Cursor bookmarksCursor;
  98
  99     // `bookmarksCursorAdapter` is used in `onCreate(), `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveBookmark()`, `onSaveBookmarkFolder()`, `onMoveToFolder()`, and `onLoadFolder()`.
 100     private CursorAdapter bookmarksCursorAdapter;
 101
 102     // `contextualActionMode` is used in `onCreate()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()` and `onMoveToFolder()`.
 103     private ActionMode contextualActionMode;
 104
 105     // `appBar` is used in `onCreate()` and `loadFolder()`.
 106     private ActionBar appBar;
 107
 108     // `oldFolderName` is used in `onCreate()` and `onSaveBookmarkFolder()`.
 109     private String oldFolderNameString;
 110
 111     // `moveBookmarkUpMenuItem` is used in `onCreate()` and `updateMoveIcons()`.
 112     private MenuItem moveBookmarkUpMenuItem;
 113
 114     // `moveBookmarkDownMenuItem` is used in `onCreate()` and `updateMoveIcons()`.
 115     private MenuItem moveBookmarkDownMenuItem;
 116
 117     // `bookmarksDeletedSnackbar` is used in `onCreate()`, `onOptionsItemSelected()`, and `onBackPressed()`.
 118     private Snackbar bookmarksDeletedSnackbar;
 119
 120     // `closeActivityAfterDismissingSnackbar` is used in `onCreate()`, `onOptionsItemSelected()`, and `onBackPressed()`.
 121     private boolean closeActivityAfterDismissingSnackbar;
 122
 123     // The favorite icon byte array is populated in `onCreate()` and used in `onOptionsItemSelected()`.
 124     private byte[] favoriteIconByteArray;
 125
 126     @Override
 127     protected void onCreate(Bundle savedInstanceState) {
 128         // Disable screenshots if not allowed.
 129         if (!MainWebViewActivity.allowScreenshots) {
 130             getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
 131         }
 132
 133         // Set the activity theme.
 134         if (MainWebViewActivity.darkTheme) {
 135             setTheme(R.style.PrivacyBrowserDark_SecondaryActivity);
 136         } else {
 137             setTheme(R.style.PrivacyBrowserLight_SecondaryActivity);
 138         }
 139
 140         // Run the default commands.
 141         super.onCreate(savedInstanceState);
 142
 143         // Get the intent that launched the activity.
 144         Intent launchingIntent = getIntent();
 145
 146         // Set the current folder variable.
 147         if (launchingIntent.getStringExtra("current_folder") != null) {  // Set the current folder from the intent.
 148             currentFolder = launchingIntent.getStringExtra("current_folder");
 149         } else {  // Set the current folder to be `""`, which is the home folder.
 150             currentFolder = "";
 151         }
 152
 153         // Get the favorite icon byte array.
 154         favoriteIconByteArray = launchingIntent.getByteArrayExtra("favorite_icon_byte_array");
 155
 156         // Convert the favorite icon byte array to a bitmap.
 157         Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
 158
 159         // Set the content view.
 160         setContentView(R.layout.bookmarks_coordinatorlayout);
 161
 162         // The AndroidX toolbar must be used until the minimum API is >= 21.
 163         final Toolbar toolbar = findViewById(R.id.bookmarks_toolbar);
 164         setSupportActionBar(toolbar);
 165
 166         // Get a handle for the activity, the app bar, and the ListView.
 167         final Activity bookmarksActivity = this;
 168         appBar = getSupportActionBar();
 169         bookmarksListView = findViewById(R.id.bookmarks_listview);
 170
 171         // Remove the incorrect lint warning that `appBar` might be null.
 172         assert appBar != null;
 173
 174         // Display the home arrow on the app bar.
 175         appBar.setDisplayHomeAsUpEnabled(true);
 176
 177         // Initialize the database helper.  `this` specifies the context.  The two `nulls` do not specify the database name or a `CursorFactory`.
 178         // The `0` specifies a database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
 179         bookmarksDatabaseHelper = new BookmarksDatabaseHelper(this, null, null, 0);
 180
 181         // Load the home folder.
 182         loadFolder();
 183
 184         // Set a listener so that tapping a list item loads the URL or folder.
 185         bookmarksListView.setOnItemClickListener((parent, view, position, id) -> {
 186             // Convert the id from long to int to match the format of the bookmarks database.
 187             int databaseID = (int) id;
 188
 189             // Get the bookmark cursor for this ID and move it to the first row.
 190             Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmark(databaseID);
 191             bookmarkCursor.moveToFirst();
 192
 193             // Act upon the bookmark according to the type.
 194             if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {  // The selected bookmark is a folder.
 195                 // Update the current folder.
 196                 currentFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 197
 198                 // Load the new folder.
 199                 loadFolder();
 200             } else {  // The selected bookmark is not a folder.
 201                 // Get the bookmark URL and assign it to `formattedUrlString`.
 202                 MainWebViewActivity.formattedUrlString = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL));
 203
 204                 // Set `MainWebViewActivity` to load the new URL on restart.
 205                 MainWebViewActivity.loadUrlOnRestart = true;
 206
 207                 // Update the bookmarks folder for the bookmarks drawer in `MainWebViewActivity`.
 208                 MainWebViewActivity.currentBookmarksFolder = currentFolder;
 209
 210                 // Close the bookmarks drawer and reload the bookmarks `ListView` when returning to `MainWebViewActivity`.
 211                 MainWebViewActivity.restartFromBookmarksActivity = true;
 212
 213                 // Return to `MainWebViewActivity`.
 214                 NavUtils.navigateUpFromSameTask(bookmarksActivity);
 215             }
 216
 217             // Close the `Cursor`.
 218             bookmarkCursor.close();
 219         });
 220
 221         // Handle long presses on the list view.
 222         bookmarksListView.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {
 223             // Instantiate the common variables.
 224             MenuItem editBookmarkMenuItem;
 225             MenuItem deleteBookmarksMenuItem;
 226             MenuItem selectAllBookmarksMenuItem;
 227             boolean deletingBookmarks;
 228
 229             @Override
 230             public boolean onCreateActionMode(ActionMode mode, Menu menu) {
 231                 // Inflate the menu for the contextual app bar.
 232                 getMenuInflater().inflate(R.menu.bookmarks_context_menu, menu);
 233
 234                 // Set the title.
 235                 if (currentFolder.isEmpty()) {  // Use `R.string.bookmarks` if in the home folder.
 236                     mode.setTitle(R.string.bookmarks);
 237                 } else {  // Use the current folder name as the title.
 238                     mode.setTitle(currentFolder);
 239                 }
 240
 241                 // Get handles for menu items that need to be selectively disabled.
 242                 moveBookmarkUpMenuItem = menu.findItem(R.id.move_bookmark_up);
 243                 moveBookmarkDownMenuItem = menu.findItem(R.id.move_bookmark_down);
 244                 editBookmarkMenuItem = menu.findItem(R.id.edit_bookmark);
 245                 deleteBookmarksMenuItem = menu.findItem(R.id.delete_bookmark);
 246                 selectAllBookmarksMenuItem = menu.findItem(R.id.context_menu_select_all_bookmarks);
 247
 248                 // Disable the delete bookmarks menu item if a delete is pending.
 249                 deleteBookmarksMenuItem.setEnabled(!deletingBookmarks);
 250
 251                 // Store a handle for the contextual action mode so it can be closed programatically.
 252                 contextualActionMode = mode;
 253
 254                 // Make it so.
 255                 return true;
 256             }
 257
 258             @Override
 259             public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
 260                 // Get a handle for the move to folder menu item.
 261                 MenuItem moveToFolderMenuItem = menu.findItem(R.id.move_to_folder);
 262
 263                 // Get a Cursor with all of the folders.
 264                 Cursor folderCursor = bookmarksDatabaseHelper.getAllFolders();
 265
 266                 // Enable the move to folder menu item if at least one folder exists.
 267                 moveToFolderMenuItem.setVisible(folderCursor.getCount() > 0);
 268
 269                 // Make it so.
 270                 return true;
 271             }
 272
 273             @Override
 274             public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
 275                 // Get the number of selected bookmarks.
 276                 int numberOfSelectedBookmarks = bookmarksListView.getCheckedItemCount();
 277
 278                 // Adjust the ActionMode and the menu according to the number of selected bookmarks.
 279                 if (numberOfSelectedBookmarks == 1) {  // One bookmark is selected.
 280                     // List the number of selected bookmarks in the subtitle.
 281                     mode.setSubtitle(getString(R.string.selected) + "  1");
 282
 283                     // Show the `Move Up`, `Move Down`, and  `Edit` options.
 284                     moveBookmarkUpMenuItem.setVisible(true);
 285                     moveBookmarkDownMenuItem.setVisible(true);
 286                     editBookmarkMenuItem.setVisible(true);
 287
 288                     // Update the enabled status of the move icons.
 289                     updateMoveIcons();
 290                 } else {  // More than one bookmark is selected.
 291                     // List the number of selected bookmarks in the subtitle.
 292                     mode.setSubtitle(getString(R.string.selected) + "  " + numberOfSelectedBookmarks);
 293
 294                     // Hide non-applicable `MenuItems`.
 295                     moveBookmarkUpMenuItem.setVisible(false);
 296                     moveBookmarkDownMenuItem.setVisible(false);
 297                     editBookmarkMenuItem.setVisible(false);
 298                 }
 299
 300                 // Do not show the select all menu item if all the bookmarks are already checked.
 301                 if (bookmarksListView.getCheckedItemCount() == bookmarksListView.getCount()) {
 302                     selectAllBookmarksMenuItem.setVisible(false);
 303                 } else {
 304                     selectAllBookmarksMenuItem.setVisible(true);
 305                 }
 306             }
 307
 308             @Override
 309             public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
 310                 // Instantiate the common variables.
 311                 int selectedBookmarkPosition;
 312                 int selectedBookmarkNewPosition;
 313                 final SparseBooleanArray selectedBookmarksPositionsSparseBooleanArray;
 314
 315                 switch (item.getItemId()) {
 316                     case R.id.move_bookmark_up:
 317                         // Get the array of checked bookmark positions.
 318                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 319
 320                         // Store the position of the selected bookmark.  Only one bookmark is selected when `move_bookmark_up` is enabled.
 321                         selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(0);
 322
 323                         // Calculate the new position of the selected bookmark.
 324                         selectedBookmarkNewPosition = selectedBookmarkPosition - 1;
 325
 326                         // Iterate through the bookmarks.
 327                         for (int i = 0; i < bookmarksListView.getCount(); i++) {
 328                             // Get the database ID for the current bookmark.
 329                             int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 330
 331                             // Update the display order for the current bookmark.
 332                             if (i == selectedBookmarkPosition) {  // The current bookmark is the selected bookmark.
 333                                 // Move the current bookmark up one.
 334                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i - 1);
 335                             } else if ((i + 1) == selectedBookmarkPosition){  // The current bookmark is immediately above the selected bookmark.
 336                                 // Move the current bookmark down one.
 337                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i + 1);
 338                             } else {  // The current bookmark is not changing positions.
 339                                 // Move `bookmarksCursor` to the current bookmark position.
 340                                 bookmarksCursor.moveToPosition(i);
 341
 342                                 // Update the display order only if it is not correct in the database.
 343                                 if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
 344                                     bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
 345                                 }
 346                             }
 347                         }
 348
 349                         // Update the bookmarks cursor with the current contents of the bookmarks database.
 350                         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 351
 352                         // Update the `ListView`.
 353                         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 354
 355                         // Scroll with the bookmark.
 356                         scrollBookmarks(selectedBookmarkNewPosition);
 357
 358                         // Update the enabled status of the move icons.
 359                         updateMoveIcons();
 360                         break;
 361
 362                     case R.id.move_bookmark_down:
 363                         // Get the array of checked bookmark positions.
 364                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 365
 366                         // Store the position of the selected bookmark.  Only one bookmark is selected when `move_bookmark_down` is enabled.
 367                         selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(0);
 368
 369                         // Calculate the new position of the selected bookmark.
 370                         selectedBookmarkNewPosition = selectedBookmarkPosition + 1;
 371
 372                         // Iterate through the bookmarks.
 373                         for (int i = 0; i <bookmarksListView.getCount(); i++) {
 374                             // Get the database ID for the current bookmark.
 375                             int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 376
 377                             // Update the display order for the current bookmark.
 378                             if (i == selectedBookmarkPosition) {  // The current bookmark is the selected bookmark.
 379                                 // Move the current bookmark down one.
 380                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i + 1);
 381                             } else if ((i - 1) == selectedBookmarkPosition) {  // The current bookmark is immediately below the selected bookmark.
 382                                 // Move the bookmark below the selected bookmark up one.
 383                                 bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i - 1);
 384                             } else {  // The current bookmark is not changing positions.
 385                                 // Move `bookmarksCursor` to the current bookmark position.
 386                                 bookmarksCursor.moveToPosition(i);
 387
 388                                 // Update the display order only if it is not correct in the database.
 389                                 if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
 390                                     bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
 391                                 }
 392                             }
 393                         }
 394
 395                         // Update the bookmarks cursor with the current contents of the bookmarks database.
 396                         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 397
 398                         // Update the `ListView`.
 399                         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 400
 401                         // Scroll with the bookmark.
 402                         scrollBookmarks(selectedBookmarkNewPosition);
 403
 404                         // Update the enabled status of the move icons.
 405                         updateMoveIcons();
 406                         break;
 407
 408                     case R.id.move_to_folder:
 409                         // Store `checkedItemIds` for use by the `AlertDialog`.
 410                         checkedItemIds = bookmarksListView.getCheckedItemIds();
 411
 412                         // Show the `MoveToFolderDialog` `AlertDialog` and name the instance `@string/move_to_folder
 413                         DialogFragment moveToFolderDialog = new MoveToFolderDialog();
 414                         moveToFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.move_to_folder));
 415                         break;
 416
 417                     case R.id.edit_bookmark:
 418                         // Get the array of checked bookmark positions.
 419                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 420
 421                         // Get the position of the selected bookmark.  Only one bookmark is selected when `edit_bookmark_down` is enabled.
 422                         selectedBookmarkPosition = selectedBookmarksPositionsSparseBooleanArray.keyAt(0);
 423
 424                         // Move the `Cursor` to the selected position and find out if it is a folder.
 425                         bookmarksCursor.moveToPosition(selectedBookmarkPosition);
 426                         boolean isFolder = (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1);
 427
 428                         // Get the selected bookmark database ID.
 429                         int databaseId = bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper._ID));
 430
 431                         // Show the edit bookmark or edit bookmark folder dialog.
 432                         if (isFolder) {
 433                             // Save the current folder name, which is used in `onSaveBookmarkFolder()`.
 434                             oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
 435
 436                             // Show the edit bookmark folder dialog.
 437                             DialogFragment editFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId, favoriteIconBitmap);
 438                             editFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_folder));
 439                         } else {
 440                             // Show the edit bookmark dialog.
 441                             DialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId, favoriteIconBitmap);
 442                             editBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_bookmark));
 443                         }
 444                         break;
 445
 446                     case R.id.delete_bookmark:
 447                         // Set the deleting bookmarks flag, which prevents the delete menu item from being enabled until the current process finishes.
 448                         deletingBookmarks = true;
 449
 450                         // Get an array of the selected row IDs.
 451                         final long[] selectedBookmarksIdsLongArray = bookmarksListView.getCheckedItemIds();
 452
 453                         // Get an array of checked bookmarks.  `.clone()` makes a copy that won't change if the list view is reloaded, which is needed for re-selecting the bookmarks on undelete.
 454                         selectedBookmarksPositionsSparseBooleanArray = bookmarksListView.getCheckedItemPositions().clone();
 455
 456                         // Update the bookmarks cursor with the current contents of the bookmarks database except for the specified database IDs.
 457                         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrderExcept(selectedBookmarksIdsLongArray, currentFolder);
 458
 459                         // Update the list view.
 460                         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 461
 462                         // Show a Snackbar with the number of deleted bookmarks.
 463                         bookmarksDeletedSnackbar = Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), getString(R.string.bookmarks_deleted) + "  " + selectedBookmarksIdsLongArray.length,
 464                                 Snackbar.LENGTH_LONG)
 465                                 .setAction(R.string.undo, view -> {
 466                                     // Do nothing because everything will be handled by `onDismissed()` below.
 467                                 })
 468                                 .addCallback(new Snackbar.Callback() {
 469                                     @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
 470                                     @Override
 471                                     public void onDismissed(Snackbar snackbar, int event) {
 472                                         switch (event) {
 473                                             // The user pushed the `Undo` button.
 474                                             case Snackbar.Callback.DISMISS_EVENT_ACTION:
 475                                                 // Update the bookmarks cursor with the current contents of the bookmarks database, including the "deleted" bookmarks.
 476                                                 bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 477
 478                                                 // Update the list view.
 479                                                 bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 480
 481                                                 // Re-select the previously selected bookmarks.
 482                                                 for (int i = 0; i < selectedBookmarksPositionsSparseBooleanArray.size(); i++) {
 483                                                     bookmarksListView.setItemChecked(selectedBookmarksPositionsSparseBooleanArray.keyAt(i), true);
 484                                                 }
 485                                                 break;
 486
 487                                             // The Snackbar was dismissed without the `Undo` button being pushed.
 488                                             default:
 489                                                 // Delete each selected bookmark.
 490                                                 for (long databaseIdLong : selectedBookmarksIdsLongArray) {
 491                                                     // Convert `databaseIdLong` to an int.
 492                                                     int databaseIdInt = (int) databaseIdLong;
 493
 494                                                     // Delete the contents of the folder if the selected bookmark is a folder.
 495                                                     if (bookmarksDatabaseHelper.isFolder(databaseIdInt)) {
 496                                                         deleteBookmarkFolderContents(databaseIdInt);
 497                                                     }
 498
 499                                                     // Delete the selected bookmark.
 500                                                     bookmarksDatabaseHelper.deleteBookmark(databaseIdInt);
 501                                                 }
 502
 503                                                 // Update the display order.
 504                                                 for (int i = 0; i < bookmarksListView.getCount(); i++) {
 505                                                     // Get the database ID for the current bookmark.
 506                                                     int currentBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 507
 508                                                     // Move `bookmarksCursor` to the current bookmark position.
 509                                                     bookmarksCursor.moveToPosition(i);
 510
 511                                                     // Update the display order only if it is not correct in the database.
 512                                                     if (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.DISPLAY_ORDER)) != i) {
 513                                                         bookmarksDatabaseHelper.updateDisplayOrder(currentBookmarkDatabaseId, i);
 514                                                     }
 515                                                 }
 516                                         }
 517
 518                                         // Reset the deleting bookmarks flag.
 519                                         deletingBookmarks = false;
 520
 521                                         // Enable the delete bookmarks menu item.
 522                                         deleteBookmarksMenuItem.setEnabled(true);
 523
 524                                         // Close the activity if back has been pressed.
 525                                         if (closeActivityAfterDismissingSnackbar) {
 526                                             onBackPressed();
 527                                         }
 528                                     }
 529                                 });
 530
 531                         //Show the Snackbar.
 532                         bookmarksDeletedSnackbar.show();
 533                         break;
 534
 535                     case R.id.context_menu_select_all_bookmarks:
 536                         // Get the total number of bookmarks.
 537                         int numberOfBookmarks = bookmarksListView.getCount();
 538
 539                         // Select them all.
 540                         for (int i = 0; i < numberOfBookmarks; i++) {
 541                             bookmarksListView.setItemChecked(i, true);
 542                         }
 543                         break;
 544                 }
 545
 546                 // Consume the click.
 547                 return true;
 548             }
 549
 550             @Override
 551             public void onDestroyActionMode(ActionMode mode) {
 552                 // Do nothing.
 553             }
 554         });
 555
 556         // Get handles for the `FloatingActionButtons`.
 557         FloatingActionButton createBookmarkFolderFab = findViewById(R.id.create_bookmark_folder_fab);
 558         FloatingActionButton createBookmarkFab = findViewById(R.id.create_bookmark_fab);
 559
 560         // Set the create new bookmark folder FAB to display the `AlertDialog`.
 561         createBookmarkFolderFab.setOnClickListener(v -> {
 562             // Create a create bookmark folder dialog.
 563             DialogFragment createBookmarkFolderDialog = CreateBookmarkFolderDialog.createBookmarkFolder(favoriteIconBitmap);
 564
 565             // Show the create bookmark folder dialog.
 566             createBookmarkFolderDialog.show(getSupportFragmentManager(), getString(R.string.create_folder));
 567         });
 568
 569         // Set the create new bookmark FAB to display the `AlertDialog`.
 570         createBookmarkFab.setOnClickListener(view -> {
 571             // Instantiate the create bookmark dialog.
 572             DialogFragment createBookmarkDialog = CreateBookmarkDialog.createBookmark(currentWebViewUrl, currentWebViewTitle, favoriteIconBitmap);
 573
 574             // Display the create bookmark dialog.
 575             createBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_bookmark));
 576         });
 577     }
 578
 579     @Override
 580     public void onRestart() {
 581         // Run the default commands.
 582         super.onRestart();
 583
 584         // Update the list view if returning from the bookmarks database view activity.
 585         if (restartFromBookmarksDatabaseViewActivity) {
 586             // Load the current folder in the list view.
 587             loadFolder();
 588
 589             // Reset `restartFromBookmarksDatabaseViewActivity`.
 590             restartFromBookmarksDatabaseViewActivity = false;
 591         }
 592     }
 593
 594     @Override
 595     public boolean onCreateOptionsMenu(Menu menu) {
 596         // Inflate the menu.
 597         getMenuInflater().inflate(R.menu.bookmarks_options_menu, menu);
 598
 599         // Success.
 600         return true;
 601     }
 602
 603     @Override
 604     public boolean onOptionsItemSelected(MenuItem menuItem) {
 605         switch (menuItem.getItemId()) {
 606             case android.R.id.home:  // The home arrow is identified as `android.R.id.home`, not just `R.id.home`.
 607                 if (currentFolder.isEmpty()) {  // Currently in the home folder.
 608                     // Run the back commands.
 609                     onBackPressed();
 610                 } else {  // Currently in a subfolder.
 611                     // Place the former parent folder in `currentFolder`.
 612                     currentFolder = bookmarksDatabaseHelper.getParentFolderName(currentFolder);
 613
 614                     // Load the new folder.
 615                     loadFolder();
 616                 }
 617                 break;
 618
 619             case R.id.options_menu_select_all_bookmarks:
 620                 // Get the total number of bookmarks.
 621                 int numberOfBookmarks = bookmarksListView.getCount();
 622
 623                 // Select them all.
 624                 for (int i = 0; i < numberOfBookmarks; i++) {
 625                     bookmarksListView.setItemChecked(i, true);
 626                 }
 627                 break;
 628
 629             case R.id.bookmarks_database_view:
 630                 // Create an intent to launch the bookmarks database view activity.
 631                 Intent bookmarksDatabaseViewIntent = new Intent(this, BookmarksDatabaseViewActivity.class);
 632
 633                 // Include the favorite icon byte array to the intent.
 634                 bookmarksDatabaseViewIntent.putExtra("favorite_icon_byte_array", favoriteIconByteArray);
 635
 636                 // Make it so.
 637                 startActivity(bookmarksDatabaseViewIntent);
 638                 break;
 639         }
 640         return true;
 641     }
 642
 643     @Override
 644     public void onBackPressed() {
 645         // Check to see if a snackbar is currently displayed.  If so, it must be closed before exiting so that a pending delete is completed before reloading the list view in the bookmarks drawer.
 646         if ((bookmarksDeletedSnackbar != null) && bookmarksDeletedSnackbar.isShown()) {  // Close the bookmarks deleted snackbar before going home.
 647             // Set the close flag.
 648             closeActivityAfterDismissingSnackbar = true;
 649
 650             // Dismiss the snackbar.
 651             bookmarksDeletedSnackbar.dismiss();
 652         } else {  // Go home immediately.
 653             // Update the bookmarks folder for the bookmarks drawer in the main WebView activity.
 654             MainWebViewActivity.currentBookmarksFolder = currentFolder;
 655
 656             // Close the bookmarks drawer and reload the bookmarks ListView when returning to the main WebView activity.
 657             MainWebViewActivity.restartFromBookmarksActivity = true;
 658
 659             // Exit the bookmarks activity.
 660             super.onBackPressed();
 661         }
 662     }
 663
 664     @Override
 665     public void onCreateBookmark(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
 666         // Get the views from the dialog fragment.
 667         EditText createBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
 668         EditText createBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
 669
 670         // Extract the strings from the edit texts.
 671         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
 672         String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
 673
 674         // Create a favorite icon byte array output stream.
 675         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 676
 677         // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
 678         favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
 679
 680         // Convert the favorite icon byte array stream to a byte array.
 681         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 682
 683         // Display the new bookmark below the current items in the (0 indexed) list.
 684         int newBookmarkDisplayOrder = bookmarksListView.getCount();
 685
 686         // Create the bookmark.
 687         bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
 688
 689         // Update the bookmarks cursor with the current contents of this folder.
 690         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 691
 692         // Update the `ListView`.
 693         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 694
 695         // Scroll to the new bookmark.
 696         bookmarksListView.setSelection(newBookmarkDisplayOrder);
 697     }
 698
 699     @Override
 700     public void onCreateBookmarkFolder(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
 701         // Get handles for the views in the dialog fragment.
 702         EditText createFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.create_folder_name_edittext);
 703         RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon_radiobutton);
 704         ImageView folderIconImageView = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon);
 705
 706         // Get new folder name string.
 707         String folderNameString = createFolderNameEditText.getText().toString();
 708
 709         // Create a folder icon bitmap.
 710         Bitmap folderIconBitmap;
 711
 712         // Set the folder icon bitmap according to the dialog.
 713         if (defaultFolderIconRadioButton.isChecked()) {  // Use the default folder icon.
 714             // Get the default folder icon drawable.
 715             Drawable folderIconDrawable = folderIconImageView.getDrawable();
 716
 717             // Convert the folder icon drawable to a bitmap drawable.
 718             BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 719
 720             // Convert the folder icon bitmap drawable to a bitmap.
 721             folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 722         } else {  // Use the WebView favorite icon.
 723             // Copy the favorite icon bitmap to the folder icon bitmap.
 724             folderIconBitmap = favoriteIconBitmap;
 725         }
 726
 727         // Create a folder icon byte array output stream.
 728         ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 729
 730         // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
 731         folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 732
 733         // Convert the folder icon byte array stream to a byte array.
 734         byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 735
 736         // Move all the bookmarks down one in the display order.
 737         for (int i = 0; i < bookmarksListView.getCount(); i++) {
 738             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 739             bookmarksDatabaseHelper.updateDisplayOrder(databaseId, i + 1);
 740         }
 741
 742         // Create the folder, which will be placed at the top of the `ListView`.
 743         bookmarksDatabaseHelper.createFolder(folderNameString, currentFolder, folderIconByteArray);
 744
 745         // Update the bookmarks cursor with the current contents of this folder.
 746         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 747
 748         // Update the `ListView`.
 749         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 750
 751         // Scroll to the new folder.
 752         bookmarksListView.setSelection(0);
 753     }
 754
 755     @Override
 756     public void onSaveBookmark(DialogFragment dialogFragment, int selectedBookmarkDatabaseId, Bitmap favoriteIconBitmap) {
 757         // Get handles for the views from `dialogFragment`.
 758         EditText editBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
 759         EditText editBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
 760         RadioButton currentBookmarkIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
 761
 762         // Store the bookmark strings.
 763         String bookmarkNameString = editBookmarkNameEditText.getText().toString();
 764         String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
 765
 766         // Update the bookmark.
 767         if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
 768             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
 769         } else {  // Update the bookmark using the WebView favorite icon.
 770             // Create a favorite icon byte array output stream.
 771             ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 772
 773             // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
 774             favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
 775
 776             // Convert the favorite icon byte array stream to a byte array.
 777             byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
 778
 779             //  Update the bookmark and the favorite icon.
 780             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
 781         }
 782
 783         // Close the contextual action mode.
 784         contextualActionMode.finish();
 785
 786         // Update the bookmarks cursor with the contents of the current folder.
 787         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 788
 789         // Update the `ListView`.
 790         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 791     }
 792
 793     @Override
 794     public void onSaveBookmarkFolder(DialogFragment dialogFragment, int selectedFolderDatabaseId, Bitmap favoriteIconBitmap) {
 795         // Get handles for the views from `dialogFragment`.
 796         RadioButton currentFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
 797         RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
 798         ImageView defaultFolderIconImageView = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_imageview);
 799         EditText editFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
 800
 801         // Get the new folder name.
 802         String newFolderNameString = editFolderNameEditText.getText().toString();
 803
 804         // Check if the favorite icon has changed.
 805         if (currentFolderIconRadioButton.isChecked()) {  // Only the name has changed.
 806             // Update the name in the database.
 807             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
 808         } else if (!currentFolderIconRadioButton.isChecked() && newFolderNameString.equals(oldFolderNameString)) {  // Only the icon has changed.
 809             // Create the new folder icon Bitmap.
 810             Bitmap folderIconBitmap;
 811
 812             // Populate the new folder icon bitmap.
 813             if (defaultFolderIconRadioButton.isChecked()) {
 814                 // Get the default folder icon drawable.
 815                 Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
 816
 817                 // Convert the folder icon drawable to a bitmap drawable.
 818                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 819
 820                 // Convert the folder icon bitmap drawable to a bitmap.
 821                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 822             } else {  // Use the WebView favorite icon.
 823                 // Copy the favorite icon bitmap to the folder icon bitmap.
 824                 folderIconBitmap = favoriteIconBitmap;
 825             }
 826
 827             // Create a folder icon byte array output stream.
 828             ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
 829
 830             // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
 831             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
 832
 833             // Convert the folder icon byte array stream to a byte array.
 834             byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
 835
 836             // Update the folder icon in the database.
 837             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, newFolderIconByteArray);
 838         } else {  // The folder icon and the name have changed.
 839             // Instantiate the new folder icon `Bitmap`.
 840             Bitmap folderIconBitmap;
 841
 842             // Populate the new folder icon bitmap.
 843             if (defaultFolderIconRadioButton.isChecked()) {
 844                 // Get the default folder icon drawable.
 845                 Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
 846
 847                 // Convert the folder icon drawable to a bitmap drawable.
 848                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 849
 850                 // Convert the folder icon bitmap drawable to a bitmap.
 851                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 852             } else {  // Use the WebView favorite icon.
 853                 // Copy the favorite icon bitmap to the folder icon bitmap.
 854                 folderIconBitmap = favoriteIconBitmap;
 855             }
 856
 857             // Create a folder icon byte array output stream.
 858             ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
 859
 860             // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
 861             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
 862
 863             // Convert the folder icon byte array stream to a byte array.
 864             byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
 865
 866             // Update the folder name and icon in the database.
 867             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, newFolderIconByteArray);
 868         }
 869
 870         // Update the bookmarks cursor with the current contents of this folder.
 871         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 872
 873         // Update the `ListView`.
 874         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 875
 876         // Close the contextual action mode.
 877         contextualActionMode.finish();
 878     }
 879
 880     @Override
 881     public void onMoveToFolder(DialogFragment dialogFragment) {
 882         // Get a handle for the `ListView` from `dialogFragment`.
 883         ListView folderListView = dialogFragment.getDialog().findViewById(R.id.move_to_folder_listview);
 884
 885         // Store a long array of the selected folders.
 886         long[] newFolderLongArray = folderListView.getCheckedItemIds();
 887
 888         // Get the new folder database ID.  Only one folder will be selected.
 889         int newFolderDatabaseId = (int) newFolderLongArray[0];
 890
 891         // Instantiate `newFolderName`.
 892         String newFolderName;
 893
 894         // Set the new folder name.
 895         if (newFolderDatabaseId == 0) {
 896             // The new folder is the home folder, represented as `""` in the database.
 897             newFolderName = "";
 898         } else {
 899             // Get the new folder name from the database.
 900             newFolderName = bookmarksDatabaseHelper.getFolderName(newFolderDatabaseId);
 901         }
 902
 903         // Get a long array with the the database ID of the selected bookmarks.
 904         long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 905
 906         // Move each of the selected bookmarks to the new folder.
 907         for (long databaseIdLong : selectedBookmarksLongArray) {
 908             // Get `databaseIdInt` for each selected bookmark.
 909             int databaseIdInt = (int) databaseIdLong;
 910
 911             // Move the selected bookmark to the new folder.
 912             bookmarksDatabaseHelper.moveToFolder(databaseIdInt, newFolderName);
 913         }
 914
 915         // Update the bookmarks cursor with the current contents of this folder.
 916         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
 917
 918         // Update the `ListView`.
 919         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
 920
 921         // Close the contextual app bar.
 922         contextualActionMode.finish();
 923     }
 924
 925     private void deleteBookmarkFolderContents(int databaseId) {
 926         // Get the name of the folder.
 927         String folderName = bookmarksDatabaseHelper.getFolderName(databaseId);
 928
 929         // Get the contents of the folder.
 930         Cursor folderCursor = bookmarksDatabaseHelper.getBookmarkIDs(folderName);
 931
 932         // Delete each of the bookmarks in the folder.
 933         for (int i = 0; i < folderCursor.getCount(); i++) {
 934             // Move `folderCursor` to the current row.
 935             folderCursor.moveToPosition(i);
 936
 937             // Get the database ID of the item.
 938             int itemDatabaseId = folderCursor.getInt(folderCursor.getColumnIndex(BookmarksDatabaseHelper._ID));
 939
 940             // If this is a folder, recursively delete the contents first.
 941             if (bookmarksDatabaseHelper.isFolder(itemDatabaseId)) {
 942                 deleteBookmarkFolderContents(itemDatabaseId);
 943             }
 944
 945             // Delete the bookmark.
 946             bookmarksDatabaseHelper.deleteBookmark(itemDatabaseId);
 947         }
 948     }
 949
 950     private void updateMoveIcons() {
 951         // Get a long array of the selected bookmarks.
 952         long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 953
 954         // Get the database IDs for the first, last, and selected bookmarks.
 955         int selectedBookmarkDatabaseId = (int) selectedBookmarksLongArray[0];
 956         int firstBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(0);
 957         // bookmarksListView is 0 indexed.
 958         int lastBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(bookmarksListView.getCount() - 1);
 959
 960         // Update the move bookmark up `MenuItem`.
 961         if (selectedBookmarkDatabaseId == firstBookmarkDatabaseId) {  // The selected bookmark is in the first position.
 962             // Disable the move bookmark up `MenuItem`.
 963             moveBookmarkUpMenuItem.setEnabled(false);
 964
 965             //  Set the move bookmark up icon to be ghosted.
 966             moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_disabled);
 967         } else {  // The selected bookmark is not in the first position.
 968             // Enable the move bookmark up `MenuItem`.
 969             moveBookmarkUpMenuItem.setEnabled(true);
 970
 971             // Set the icon according to the theme.
 972             if (MainWebViewActivity.darkTheme) {
 973                 moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_enabled_dark);
 974             } else {
 975                 moveBookmarkUpMenuItem.setIcon(R.drawable.move_up_enabled_light);
 976             }
 977         }
 978
 979         // Update the move bookmark down `MenuItem`.
 980         if (selectedBookmarkDatabaseId == lastBookmarkDatabaseId) {  // The selected bookmark is in the last position.
 981             // Disable the move bookmark down `MenuItem`.
 982             moveBookmarkDownMenuItem.setEnabled(false);
 983
 984             // Set the move bookmark down icon to be ghosted.
 985             moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_disabled);
 986         } else {  // The selected bookmark is not in the last position.
 987             // Enable the move bookmark down `MenuItem`.
 988             moveBookmarkDownMenuItem.setEnabled(true);
 989
 990             // Set the icon according to the theme.
 991             if (MainWebViewActivity.darkTheme) {
 992                 moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_enabled_dark);
 993             } else {
 994                 moveBookmarkDownMenuItem.setIcon(R.drawable.move_down_enabled_light);
 995             }
 996         }
 997     }
 998
 999     private void scrollBookmarks(int selectedBookmarkPosition) {
1000         // Get the first and last visible bookmark positions.
1001         int firstVisibleBookmarkPosition = bookmarksListView.getFirstVisiblePosition();
1002         int lastVisibleBookmarkPosition = bookmarksListView.getLastVisiblePosition();
1003
1004         // Calculate the number of bookmarks per screen.
1005         int numberOfBookmarksPerScreen = lastVisibleBookmarkPosition - firstVisibleBookmarkPosition;
1006
1007         // Scroll with the moved bookmark if necessary.
1008         if (selectedBookmarkPosition <= firstVisibleBookmarkPosition) {  // The selected bookmark position is at or above the top of the screen.
1009             // Scroll to the selected bookmark position.
1010             bookmarksListView.setSelection(selectedBookmarkPosition);
1011         } else if (selectedBookmarkPosition >= (lastVisibleBookmarkPosition - 1)) {  // The selected bookmark is at or below the bottom of the screen.
1012             // The `-1` handles partial bookmarks displayed at the bottom of the list view.  This command scrolls to display the selected bookmark at the bottom of the screen.
1013             // `+1` assures that the entire bookmark will be displayed in situations where only a partial bookmark fits at the bottom of the list view.
1014             bookmarksListView.setSelection(selectedBookmarkPosition - numberOfBookmarksPerScreen + 1);
1015         }
1016     }
1017
1018     private void loadFolder() {
1019         // Update bookmarks cursor with the contents of the bookmarks database for the current folder.
1020         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentFolder);
1021
1022         // Setup a `CursorAdapter`.  `this` specifies the `Context`.  `false` disables `autoRequery`.
1023         bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
1024             @Override
1025             public View newView(Context context, Cursor cursor, ViewGroup parent) {
1026                 // Inflate the individual item layout.  `false` does not attach it to the root.
1027                 return getLayoutInflater().inflate(R.layout.bookmarks_activity_item_linearlayout, parent, false);
1028             }
1029
1030             @Override
1031             public void bindView(View view, Context context, Cursor cursor) {
1032                 // Get handles for the views.
1033                 ImageView bookmarkFavoriteIcon = view.findViewById(R.id.bookmark_favorite_icon);
1034                 TextView bookmarkNameTextView = view.findViewById(R.id.bookmark_name);
1035
1036                 // Get the favorite icon byte array from the `Cursor`.
1037                 byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
1038
1039                 // Convert the byte array to a `Bitmap` beginning at the first byte and ending at the last.
1040                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
1041
1042                 // Display the bitmap in `bookmarkFavoriteIcon`.
1043                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
1044
1045                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
1046                 String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
1047                 bookmarkNameTextView.setText(bookmarkNameString);
1048
1049                 // Make the font bold for folders.
1050                 if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
1051                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT_BOLD);
1052                 } else {  // Reset the font to default for normal bookmarks.
1053                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
1054                 }
1055             }
1056         };
1057
1058         // Populate the list view with the adapter.
1059         bookmarksListView.setAdapter(bookmarksCursorAdapter);
1060
1061         // Set the `AppBar` title.
1062         if (currentFolder.isEmpty()) {
1063             appBar.setTitle(R.string.bookmarks);
1064         } else {
1065             appBar.setTitle(currentFolder);
1066         }
1067     }
1068
1069     @Override
1070     public void onDestroy() {
1071         // Close the bookmarks cursor and database.
1072         bookmarksCursor.close();
1073         bookmarksDatabaseHelper.close();
1074
1075         // Run the default commands.
1076         super.onDestroy();
1077     }
1078 }