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

   1 /**
   2  * Copyright 2016 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;
  21
  22 import android.app.Activity;
  23 import android.app.DialogFragment;
  24 import android.content.Context;
  25 import android.content.Intent;
  26 import android.database.Cursor;
  27 import android.database.DatabaseUtils;
  28 import android.graphics.Bitmap;
  29 import android.graphics.BitmapFactory;
  30 import android.graphics.Typeface;
  31 import android.graphics.drawable.BitmapDrawable;
  32 import android.graphics.drawable.Drawable;
  33 import android.os.Bundle;
  34 import android.support.design.widget.FloatingActionButton;
  35 import android.support.design.widget.Snackbar;
  36 import android.support.v4.app.NavUtils;
  37 import android.support.v4.content.ContextCompat;
  38 import android.support.v4.widget.CursorAdapter;
  39 import android.support.v7.app.ActionBar;
  40 import android.support.v7.app.AppCompatActivity;
  41 import android.support.v7.widget.Toolbar;
  42 import android.util.SparseBooleanArray;
  43 import android.view.ActionMode;
  44 import android.view.Menu;
  45 import android.view.MenuItem;
  46 import android.view.View;
  47 import android.view.ViewGroup;
  48 import android.widget.AbsListView;
  49 import android.widget.AdapterView;
  50 import android.widget.CheckBox;
  51 import android.widget.EditText;
  52 import android.widget.ImageView;
  53 import android.widget.ListView;
  54 import android.widget.RadioButton;
  55 import android.widget.TextView;
  56
  57 import java.io.ByteArrayOutputStream;
  58
  59 public class BookmarksActivity extends AppCompatActivity implements CreateBookmark.CreateBookmarkListener,
  60         CreateBookmarkFolder.CreateBookmarkFolderListener, EditBookmark.EditBookmarkListener,
  61         EditBookmarkFolder.EditBookmarkFolderListener {
  62     // `bookmarksDatabaseHandler` is public static so it can be accessed from EditBookmark.  It is also used in `onCreate()`,
  63     // `onCreateBookmarkCreate()`, `updateBookmarksListView()`, and `updateBookmarksListViewExcept()`.
  64     public static BookmarksDatabaseHandler bookmarksDatabaseHandler;
  65
  66     // `bookmarksListView` is public static so it can be accessed from EditBookmark.
  67     // It is also used in `onCreate()`, `updateBookmarksListView()`, and `updateBookmarksListViewExcept()`.
  68     public static ListView bookmarksListView;
  69
  70     // `currentFolder` is used in `onCreate`, `onOptionsItemSelected()`, `onCreateBookmarkCreate`, `onCreateBookmarkFolderCreate`, and `onEditBookmarkSave`.
  71     private String currentFolder;
  72
  73     // `contextualActionMode` is used in `onCreate()` and `onEditBookmarkSave()`.
  74     private ActionMode contextualActionMode;
  75
  76     // `selectedBookmarkPosition` is used in `onCreate()` and `onEditBookarkSave()`.
  77     private int selectedBookmarkPosition;
  78
  79     // `appBar` is used in `onCreate()` and `updateBookmarksListView()`.
  80     private ActionBar appBar;
  81
  82     // `bookmarksCursor` is used in `onCreate()`, `updateBookmarksListView()`, and `updateBookmarksListViewExcept()`.
  83     private Cursor bookmarksCursor;
  84
  85     // `oldFolderName` is used in `onCreate()` and `onEditBookmarkFolderSave()`.
  86     private String oldFolderNameString;
  87
  88     @Override
  89     protected void onCreate(Bundle savedInstanceState) {
  90         super.onCreate(savedInstanceState);
  91         setContentView(R.layout.bookmarks_coordinatorlayout);
  92
  93         // We need to use the `SupportActionBar` from `android.support.v7.app.ActionBar` until the minimum API is >= 21.
  94         final Toolbar bookmarksAppBar = (Toolbar) findViewById(R.id.bookmarks_toolbar);
  95         setSupportActionBar(bookmarksAppBar);
  96
  97         // Display the home arrow on `SupportActionBar`.
  98         appBar = getSupportActionBar();
  99         assert appBar != null;// This assert removes the incorrect warning in Android Studio on the following line that appBar might be null.
 100         appBar.setDisplayHomeAsUpEnabled(true);
 101
 102
 103         // Initialize the database handler and the ListView.
 104         // `this` specifies the context.  The two `null`s do not specify the database name or a `CursorFactory`.
 105         // The `0` is to specify a database version, but that is set instead using a constant in `BookmarksDatabaseHandler`.
 106         bookmarksDatabaseHandler = new BookmarksDatabaseHandler(this, null, null, 0);
 107         bookmarksListView = (ListView) findViewById(R.id.bookmarks_listview);
 108
 109         // Set currentFolder to the home folder, which is null in the database.
 110         currentFolder = "";
 111
 112         // Display the bookmarks in the ListView.
 113         updateBookmarksListView(currentFolder);
 114
 115         // Set a listener so that tapping a list item loads the URL.  We need to store the activity
 116         // in a variable so that we can return to the parent activity after loading the URL.
 117         final Activity bookmarksActivity = this;
 118         bookmarksListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
 119             @Override
 120             public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
 121                 // Convert the id from long to int to match the format of the bookmarks database.
 122                 int databaseID = (int) id;
 123
 124                 // Get the bookmark `Cursor` and move it to the first row.
 125                 Cursor bookmarkCursor = bookmarksDatabaseHandler.getBookmarkCursor(databaseID);
 126                 bookmarkCursor.moveToFirst();
 127
 128                 // If the bookmark is a folder load its contents into the ListView.
 129                 if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHandler.IS_FOLDER)) == 1) {
 130                     // Update `currentFolder`.
 131                     currentFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHandler.BOOKMARK_NAME));
 132
 133                     // Reload the ListView with `currentFolder`.
 134                     updateBookmarksListView(currentFolder);
 135                 } else {  // Load the URL into `mainWebView`.
 136                     // Get the bookmark URL and assign it to formattedUrlString.
 137                     MainWebViewActivity.formattedUrlString = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHandler.BOOKMARK_URL));
 138
 139                     //  Load formattedUrlString and return to the main activity.
 140                     MainWebViewActivity.mainWebView.loadUrl(MainWebViewActivity.formattedUrlString);
 141                     NavUtils.navigateUpFromSameTask(bookmarksActivity);
 142                 }
 143
 144                 // Close the `Cursor`.
 145                 bookmarkCursor.close();
 146             }
 147         });
 148
 149         // `MultiChoiceModeListener` handles long clicks.
 150         bookmarksListView.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {
 151             // `moveBookmarkUpMenuItem` is used in `onCreateActionMode()` and `onItemCheckedStateChanged`.
 152             MenuItem moveBookmarkUpMenuItem;
 153
 154             // `moveBookmarkDownMenuItem` is used in `onCreateActionMode()` and `onItemCheckedStateChanged`.
 155             MenuItem moveBookmarkDownMenuItem;
 156
 157             // `editBookmarkMenuItem` is used in `onCreateActionMode()` and `onItemCheckedStateChanged`.
 158             MenuItem editBookmarkMenuItem;
 159
 160             // `selectAllBookmarks` is used in `onCreateActionMode()` and `onItemCheckedStateChanges`.
 161             MenuItem selectAllBookmarksMenuItem;
 162
 163             @Override
 164             public boolean onCreateActionMode(ActionMode mode, Menu menu) {
 165                 // Inflate the menu for the contextual app bar and set the title.
 166                 getMenuInflater().inflate(R.menu.bookmarks_context_menu, menu);
 167
 168                 // Set the title.
 169                 if (currentFolder.isEmpty()) {
 170                     // Use `R.string.bookmarks` if we are in the home folder.
 171                     mode.setTitle(R.string.bookmarks);
 172                 } else {  // Use the current folder name as the title.
 173                     mode.setTitle(currentFolder);
 174                 }
 175
 176                 // Get a handle for MenuItems we need to selectively disable.
 177                 moveBookmarkUpMenuItem = menu.findItem(R.id.move_bookmark_up);
 178                 moveBookmarkDownMenuItem = menu.findItem(R.id.move_bookmark_down);
 179                 editBookmarkMenuItem = menu.findItem(R.id.edit_bookmark);
 180                 selectAllBookmarksMenuItem = menu.findItem(R.id.context_menu_select_all_bookmarks);
 181
 182                 return true;
 183             }
 184
 185             @Override
 186             public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
 187                 return false;
 188             }
 189
 190             @Override
 191             public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
 192                 // Get an array of the selected bookmarks.
 193                 long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 194
 195                 // Calculate the number of selected bookmarks.
 196                 int numberOfSelectedBookmarks = selectedBookmarksLongArray.length;
 197
 198                 // List the number of selected bookmarks in the subtitle.
 199                 mode.setSubtitle(numberOfSelectedBookmarks + " " + getString(R.string.selected));
 200
 201                 if (numberOfSelectedBookmarks == 1) {
 202                     // Show the `Move Up`, `Move Down`, and  `Edit` option only if 1 bookmark is selected.
 203                     moveBookmarkUpMenuItem.setVisible(true);
 204                     moveBookmarkDownMenuItem.setVisible(true);
 205                     editBookmarkMenuItem.setVisible(true);
 206
 207                     // Get the database IDs for the bookmarks.
 208                     int selectedBookmarkDatabaseId = (int) selectedBookmarksLongArray[0];
 209                     int firstBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(0);
 210                     // bookmarksListView is 0 indexed.
 211                     int lastBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(bookmarksListView.getCount() - 1);
 212
 213                     // Disable `moveBookmarkUpMenuItem` if the selected bookmark is at the top of the ListView.
 214                     if (selectedBookmarkDatabaseId == firstBookmarkDatabaseId) {
 215                         moveBookmarkUpMenuItem.setEnabled(false);
 216                         moveBookmarkUpMenuItem.setIcon(R.drawable.move_bookmark_up_disabled);
 217                     } else {  // Otherwise enable `moveBookmarkUpMenuItem`.
 218                         moveBookmarkUpMenuItem.setEnabled(true);
 219                         moveBookmarkUpMenuItem.setIcon(R.drawable.move_bookmark_up_enabled);
 220                     }
 221
 222                     // Disable `moveBookmarkDownMenuItem` if the selected bookmark is at the bottom of the ListView.
 223                     if (selectedBookmarkDatabaseId == lastBookmarkDatabaseId) {
 224                         moveBookmarkDownMenuItem.setEnabled(false);
 225                         moveBookmarkDownMenuItem.setIcon(R.drawable.move_bookmark_down_disabled);
 226                     } else {  // Otherwise enable `moveBookmarkDownMenuItem`.
 227                         moveBookmarkDownMenuItem.setEnabled(true);
 228                         moveBookmarkDownMenuItem.setIcon(R.drawable.move_bookmark_down_enabled);
 229                     }
 230                 } else {  // Hide the MenuItems because more than one bookmark is selected.
 231                     moveBookmarkUpMenuItem.setVisible(false);
 232                     moveBookmarkDownMenuItem.setVisible(false);
 233                     editBookmarkMenuItem.setVisible(false);
 234                 }
 235
 236                 // Do not show `Select All` if all the bookmarks are already checked.
 237                 if (bookmarksListView.getCheckedItemIds().length == bookmarksListView.getCount()) {
 238                     selectAllBookmarksMenuItem.setVisible(false);
 239                 } else {
 240                     selectAllBookmarksMenuItem.setVisible(true);
 241                 }
 242             }
 243
 244             @Override
 245             public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
 246                 int menuItemId = item.getItemId();
 247
 248                 // `numberOfBookmarks` is used in `R.id.move_bookmark_up_enabled`, `R.id.move_bookmark_down_enabled`, and `R.id.context_menu_select_all_bookmarks`.
 249                 int numberOfBookmarks;
 250
 251                 // `selectedBookmarkLongArray` is used in `R.id.move_bookmark_up`, `R.id.move_bookmark_down`, and `R.id.edit_bookmark`.
 252                 long[]selectedBookmarkLongArray;
 253                 // `selectedBookmarkDatabaseId` is used in `R.id.move_bookmark_up`, `R.id.move_bookmark_down`, and `R.id.edit_bookmark`.
 254                 int selectedBookmarkDatabaseId;
 255                 // `selectedBookmarkNewPosition` is used in `R.id.move_bookmark_up` and `R.id.move_bookmark_down`.
 256                 int selectedBookmarkNewPosition;
 257                 // `bookmarkPositionSparseBooleanArray` is used in `R.id.edit_bookmark` and `R.id.delete_bookmark`.
 258                 SparseBooleanArray bookmarkPositionSparseBooleanArray;
 259
 260                 switch (menuItemId) {
 261                     case R.id.move_bookmark_up:
 262                         // Get the selected bookmark database ID.
 263                         selectedBookmarkLongArray = bookmarksListView.getCheckedItemIds();
 264                         selectedBookmarkDatabaseId = (int) selectedBookmarkLongArray[0];
 265
 266                         // Initialize `selectedBookmarkNewPosition`.
 267                         selectedBookmarkNewPosition = 0;
 268
 269                         for (int i = 0; i < bookmarksListView.getCount(); i++) {
 270                             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 271                             int nextBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i + 1);
 272
 273                             if (databaseId == selectedBookmarkDatabaseId || nextBookmarkDatabaseId == selectedBookmarkDatabaseId) {
 274                                 if (databaseId == selectedBookmarkDatabaseId) {
 275                                     // Move the selected bookmark up one and store the new bookmark position.
 276                                     bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i - 1);
 277                                     selectedBookmarkNewPosition = i - 1;
 278                                 } else {  // Move the bookmark above the selected bookmark down one.
 279                                     bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i + 1);
 280                                 }
 281                             } else {
 282                                 // Reset the rest of the bookmarks' DISPLAY_ORDER to match the position in the ListView.
 283                                 // This isn't necessary, but it clears out any stray values that might have crept into the database.
 284                                 bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i);
 285                             }
 286                         }
 287
 288                         // Refresh the ListView.
 289                         updateBookmarksListView(currentFolder);
 290
 291                         // Select the previously selected bookmark in the new location.
 292                         bookmarksListView.setItemChecked(selectedBookmarkNewPosition, true);
 293
 294                         bookmarksListView.setSelection(selectedBookmarkNewPosition - 5);
 295
 296                         break;
 297
 298                     case R.id.move_bookmark_down:
 299                         // Get the selected bookmark database ID.
 300                         selectedBookmarkLongArray = bookmarksListView.getCheckedItemIds();
 301                         selectedBookmarkDatabaseId = (int) selectedBookmarkLongArray[0];
 302
 303                         // Initialize `selectedBookmarkNewPosition`.
 304                         selectedBookmarkNewPosition = 0;
 305
 306                         for (int i = 0; i <bookmarksListView.getCount(); i++) {
 307                             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 308                             int previousBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i - 1);
 309
 310                             if (databaseId == selectedBookmarkDatabaseId || previousBookmarkDatabaseId == selectedBookmarkDatabaseId) {
 311                                 if (databaseId == selectedBookmarkDatabaseId) {
 312                                     // Move the selected bookmark down one and store the new bookmark position.
 313                                     bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i + 1);
 314                                     selectedBookmarkNewPosition = i + 1;
 315                                 } else {  // Move the bookmark below the selected bookmark up one.
 316                                     bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i - 1);
 317                                 }
 318                             } else {
 319                                 // Reset the rest of the bookmark' DISPLAY_ORDER to match the position in the ListView.
 320                                 // This isn't necessary, but it clears out any stray values that might have crept into the database.
 321                                 bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i);
 322                             }
 323                         }
 324
 325                         // Refresh the ListView.
 326                         updateBookmarksListView(currentFolder);
 327
 328                         // Select the previously selected bookmark in the new location.
 329                         bookmarksListView.setItemChecked(selectedBookmarkNewPosition, true);
 330
 331                         bookmarksListView.setSelection(selectedBookmarkNewPosition - 5);
 332                         break;
 333
 334                     case R.id.edit_bookmark:
 335                         // Get a handle for `contextualActionMode` so we can close it when `editBookmarkDialog` is finished.
 336                         contextualActionMode = mode;
 337
 338                         // Get a handle for `selectedBookmarkPosition` so we can scroll to it after refreshing the ListView.
 339                         bookmarkPositionSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 340                         selectedBookmarkPosition = bookmarkPositionSparseBooleanArray.keyAt(0);
 341
 342                         // Move to the selected database ID and find out if it is a folder.
 343                         bookmarksCursor.moveToPosition(selectedBookmarkPosition);
 344                         boolean isFolder = (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHandler.IS_FOLDER)) == 1);
 345
 346                         if (isFolder) {
 347                             // Save the current folder name.
 348                             oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHandler.BOOKMARK_NAME));
 349
 350                             // Show the `EditBookmarkFolder` `AlertDialog` and name the instance `@string/edit_folder`.
 351                             DialogFragment editFolderDialog = new EditBookmarkFolder();
 352                             editFolderDialog.show(getFragmentManager(), getResources().getString(R.string.edit_folder));
 353                         } else {
 354                             // Show the `EditBookmark` `AlertDialog` and name the instance `@string/edit_bookmark`.
 355                             DialogFragment editBookmarkDialog = new EditBookmark();
 356                             editBookmarkDialog.show(getFragmentManager(), getResources().getString(R.string.edit_bookmark));
 357                         }
 358                         break;
 359
 360                     case R.id.delete_bookmark:
 361                         // Get an array of the selected rows.
 362                         final long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 363
 364                         // Get a handle for `selectedBookmarkPosition` so we can scroll to it after refreshing the ListView.
 365                         bookmarkPositionSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 366                         selectedBookmarkPosition = bookmarkPositionSparseBooleanArray.keyAt(0);
 367
 368                         updateBookmarksListViewExcept(selectedBookmarksLongArray, currentFolder);
 369
 370                         // Scroll to where the deleted bookmark was located.
 371                         bookmarksListView.setSelection(selectedBookmarkPosition);
 372
 373                         String snackbarMessage;
 374
 375                         // Determine how many items are in the array and prepare an appropriate Snackbar message.
 376                         if (selectedBookmarksLongArray.length == 1) {
 377                             snackbarMessage = getString(R.string.one_bookmark_deleted);
 378                         } else {
 379                             snackbarMessage = selectedBookmarksLongArray.length + " " + getString(R.string.bookmarks_deleted);
 380                         }
 381
 382                         // Show a SnackBar.
 383                         Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), snackbarMessage, Snackbar.LENGTH_LONG)
 384                                 .setAction(R.string.undo, new View.OnClickListener() {
 385                                     @Override
 386                                     public void onClick(View view) {
 387                                         // Do nothing because everything will be handled by `onDismissed()` below.
 388                                     }
 389                                 })
 390                                 .setCallback(new Snackbar.Callback() {
 391                                     @Override
 392                                     public void onDismissed(Snackbar snackbar, int event) {
 393                                         switch (event) {
 394                                             // The user pushed the "Undo" button.
 395                                             case Snackbar.Callback.DISMISS_EVENT_ACTION:
 396                                                 // Refresh the ListView to show the rows again.
 397                                                 updateBookmarksListView(currentFolder);
 398
 399                                                 break;
 400
 401                                             // The Snackbar was dismissed without the "Undo" button being pushed.
 402                                             default:
 403                                                 // Delete each selected row.
 404                                                 for (long databaseIdLong : selectedBookmarksLongArray) {
 405                                                     // Convert `databaseIdLong` to an int.
 406                                                     int databaseIdInt = (int) databaseIdLong;
 407
 408                                                     // Delete the database row.
 409                                                     bookmarksDatabaseHandler.deleteBookmark(databaseIdInt);
 410                                                 }
 411                                                 break;
 412                                         }
 413                                     }
 414                                 })
 415                                 .show();
 416
 417                         // Close the contextual app bar.
 418                         mode.finish();
 419                         break;
 420
 421                     case R.id.context_menu_select_all_bookmarks:
 422                         numberOfBookmarks = bookmarksListView.getCount();
 423
 424                         for (int i = 0; i < numberOfBookmarks; i++) {
 425                             bookmarksListView.setItemChecked(i, true);
 426                         }
 427                         break;
 428                 }
 429                 // Consume the click.
 430                 return true;
 431             }
 432
 433             @Override
 434             public void onDestroyActionMode(ActionMode mode) {
 435
 436             }
 437         });
 438
 439         // Set a FloatingActionButton for creating new bookmarks.
 440         FloatingActionButton createBookmarkFAB = (FloatingActionButton) findViewById(R.id.create_bookmark_fab);
 441         assert createBookmarkFAB != null;
 442         createBookmarkFAB.setOnClickListener(new View.OnClickListener() {
 443             @Override
 444             public void onClick(View view) {
 445                 // Show the `CreateBookmark` `AlertDialog` and name the instance `@string/create_bookmark`.
 446                 DialogFragment createBookmarkDialog = new CreateBookmark();
 447                 createBookmarkDialog.show(getFragmentManager(), getResources().getString(R.string.create_bookmark));
 448             }
 449         });
 450     }
 451
 452     @Override
 453     public boolean onCreateOptionsMenu(Menu menu) {
 454         //Inflate the menu.
 455         getMenuInflater().inflate(R.menu.bookmarks_options_menu, menu);
 456
 457         return true;
 458     }
 459
 460     @Override
 461     public boolean onPrepareOptionsMenu(Menu menu) {
 462         super.onPrepareOptionsMenu(menu);
 463
 464         return true;
 465     }
 466
 467     @Override
 468     public boolean onOptionsItemSelected(MenuItem menuItem) {
 469         int menuItemId = menuItem.getItemId();
 470
 471         switch (menuItemId) {
 472             case android.R.id.home:
 473                 // Exit BookmarksActivity if currently at the home folder.
 474                 if (currentFolder.isEmpty()) {
 475                     NavUtils.navigateUpFromSameTask(this);
 476                 } else {  // Navigate up one folder.
 477                     // Place the former parent folder in `currentFolder`.
 478                     currentFolder = bookmarksDatabaseHandler.getParentFolder(currentFolder);
 479
 480                     updateBookmarksListView(currentFolder);
 481                 }
 482                 break;
 483
 484             case R.id.create_folder:
 485                 // Show the `CreateBookmarkFolder` `AlertDialog` and name the instance `@string/create_folder`.
 486                 DialogFragment createBookmarkFolderDialog = new CreateBookmarkFolder();
 487                 createBookmarkFolderDialog.show(getFragmentManager(), getResources().getString(R.string.create_folder));
 488                 break;
 489
 490             case R.id.options_menu_select_all_bookmarks:
 491                 int numberOfBookmarks = bookmarksListView.getCount();
 492
 493                 for (int i = 0; i < numberOfBookmarks; i++) {
 494                     bookmarksListView.setItemChecked(i, true);
 495                 }
 496                 break;
 497
 498             case R.id.bookmarks_database_view:
 499                 // Launch `BookmarksDatabaseViewActivity`.
 500                 Intent bookmarksDatabaseViewIntent = new Intent(this, BookmarksDatabaseViewActivity.class);
 501                 startActivity(bookmarksDatabaseViewIntent);
 502                 break;
 503         }
 504         return true;
 505     }
 506
 507     @Override
 508     public void onCancelCreateBookmark(DialogFragment dialogFragment) {
 509         // Do nothing because the user selected `Cancel`.
 510     }
 511
 512     @Override
 513     public void onCreateBookmark(DialogFragment dialogFragment) {
 514         // Get the `EditText`s from the `createBookmarkDialogFragment` and extract the strings.
 515         EditText createBookmarkNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
 516         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
 517         EditText createBookmarkUrlEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
 518         String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
 519
 520         // Convert the favoriteIcon Bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
 521         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 522         MainWebViewActivity.favoriteIcon.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
 523         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 524
 525         // Display the new bookmark below the current items in the (0 indexed) list.
 526         int newBookmarkDisplayOrder = bookmarksListView.getCount();
 527
 528         // Create the bookmark.
 529         bookmarksDatabaseHandler.createBookmark(bookmarkNameString, bookmarkUrlString, newBookmarkDisplayOrder, currentFolder, favoriteIconByteArray);
 530
 531         // Refresh the ListView.  `setSelection` scrolls to the bottom of the list.
 532         updateBookmarksListView(currentFolder);
 533         bookmarksListView.setSelection(newBookmarkDisplayOrder);
 534     }
 535
 536     @Override
 537     public void onCancelCreateBookmarkFolder(DialogFragment dialogFragment) {
 538         // Do nothing because the user selected `Cancel`.
 539     }
 540
 541     @Override
 542     public void onCreateBookmarkFolder(DialogFragment dialogFragment) {
 543         // Get `create_folder_name_edit_text` and extract the string.
 544         EditText createFolderNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_folder_name_edittext);
 545         String folderNameString = createFolderNameEditText.getText().toString();
 546
 547         // Check to see if the folder already exists.
 548         Cursor bookmarkFolderCursor = bookmarksDatabaseHandler.getFolderCursor(folderNameString);
 549         int existingFoldersWithNewName = bookmarkFolderCursor.getCount();
 550         bookmarkFolderCursor.close();
 551         if (folderNameString.isEmpty() || (existingFoldersWithNewName > 0)) {
 552             String cannotCreateFolder = getResources().getString(R.string.cannot_create_folder) + " \"" + folderNameString + "\"";
 553             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), cannotCreateFolder, Snackbar.LENGTH_INDEFINITE).show();
 554         } else {  // Create the folder.
 555             // Get the new folder icon.
 556             RadioButton defaultFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon_radiobuttion);
 557             Bitmap folderIconBitmap;
 558             if (defaultFolderIconRadioButton.isChecked()) {
 559                 // Get the default folder icon drawable and convert it to a `Bitmap`.  `this` specifies the current context.
 560                 Drawable folderIconDrawable = ContextCompat.getDrawable(this, R.drawable.folder_blue_bitmap);
 561                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 562                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 563             } else {
 564                 folderIconBitmap = MainWebViewActivity.favoriteIcon;
 565             }
 566
 567             // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
 568             ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 569             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 570             byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 571
 572             // Move all the bookmarks down one in the display order.
 573             for (int i = 0; i < bookmarksListView.getCount(); i++) {
 574                 int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 575                 bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i + 1);
 576             }
 577
 578             // Create the folder, placing it at the top of the ListView
 579             bookmarksDatabaseHandler.createFolder(folderNameString, 0, currentFolder, folderIconByteArray);
 580
 581             // Refresh the ListView.
 582             updateBookmarksListView(currentFolder);
 583         }
 584     }
 585
 586     @Override
 587     public void onCancelEditBookmark(DialogFragment dialogFragment) {
 588         // Do nothing because the user selected `Cancel`.
 589     }
 590
 591     @Override
 592     public void onSaveEditBookmark(DialogFragment dialogFragment) {
 593         // Get a long array with the the databaseId of the selected bookmark and convert it to an `int`.
 594         long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 595         int selectedBookmarkDatabaseId = (int) selectedBookmarksLongArray[0];
 596
 597         // Get the `EditText`s from the `editBookmarkDialogFragment` and extract the strings.
 598         EditText editBookmarkNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
 599         String bookmarkNameString = editBookmarkNameEditText.getText().toString();
 600         EditText editBookmarkUrlEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
 601         String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
 602
 603         // Get `edit_bookmark_current_icon_radiobutton`.
 604         RadioButton currentBookmarkIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
 605
 606         if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
 607             bookmarksDatabaseHandler.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
 608         } else {  // Update the bookmark and the favorite icon.
 609             // Get the new favorite icon from the `Dialog` and convert it into a `Bitmap`.
 610             ImageView newFavoriteIconImageView = (ImageView) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_web_page_favorite_icon);
 611             Drawable newFavoriteIconDrawable = newFavoriteIconImageView.getDrawable();
 612             Bitmap newFavoriteIconBitmap = ((BitmapDrawable) newFavoriteIconDrawable).getBitmap();
 613
 614             // Convert `newFavoriteIconBitmap` into a Byte Array.
 615             ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 616             newFavoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
 617             byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
 618
 619             //  Update the bookmark and the favorite icon.
 620             bookmarksDatabaseHandler.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
 621         }
 622
 623         // Close the contextual action mode.
 624         contextualActionMode.finish();
 625
 626         // Refresh the `ListView`.  `setSelection` scrolls to the position of the bookmark that was edited.
 627         updateBookmarksListView(currentFolder);
 628         bookmarksListView.setSelection(selectedBookmarkPosition);
 629     }
 630
 631     @Override
 632     public void onCancelEditBookmarkFolder(DialogFragment dialogFragment) {
 633         // Do nothing because the user selected `Cancel`.
 634     }
 635
 636     @Override
 637     public void onSaveEditBookmarkFolder(DialogFragment dialogFragment) {
 638         // Get the new folder name.
 639         EditText editFolderNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
 640         String newFolderNameString = editFolderNameEditText.getText().toString();
 641
 642         // Check to see if the new folder name is unique.
 643         Cursor bookmarkFolderCursor = bookmarksDatabaseHandler.getFolderCursor(newFolderNameString);
 644         int existingFoldersWithNewName = bookmarkFolderCursor.getCount();
 645         bookmarkFolderCursor.close();
 646         if ( ((existingFoldersWithNewName == 0) || newFolderNameString.equals(oldFolderNameString)) && !newFolderNameString.isEmpty()) {
 647             // Get a long array with the the databaseId of the selected folder and convert it to an `int`.
 648             long[] selectedFolderLongArray = bookmarksListView.getCheckedItemIds();
 649             int selectedFolderDatabaseId = (int) selectedFolderLongArray[0];
 650
 651             // Get the `RadioButtons` from the `Dialog`.
 652             RadioButton currentFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
 653             RadioButton defaultFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
 654             Bitmap folderIconBitmap;
 655
 656             // Prepare the favorite icon.
 657             if (currentFolderIconRadioButton.isChecked()) {
 658                 // Update the folder name if it has changed.
 659                 if (!newFolderNameString.equals(oldFolderNameString)) {
 660                     bookmarksDatabaseHandler.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
 661
 662                     // Refresh the `ListView`.  `setSelection` scrolls to the position of the folder that was edited.
 663                     updateBookmarksListView(currentFolder);
 664                     bookmarksListView.setSelection(selectedBookmarkPosition);
 665                 }
 666             } else {  // Prepare the new favorite icon.
 667                 if (defaultFolderIconRadioButton.isChecked()) {
 668                     // Get the default folder icon drawable and convert it to a `Bitmap`.  `this` specifies the current context.
 669                     Drawable folderIconDrawable = ContextCompat.getDrawable(this, R.drawable.folder_blue_bitmap);
 670                     BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 671                     folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 672                 } else {  // Use the web page favorite icon.
 673                     folderIconBitmap = MainWebViewActivity.favoriteIcon;
 674                 }
 675
 676                 // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
 677                 ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 678                 folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 679                 byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 680
 681                 bookmarksDatabaseHandler.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, folderIconByteArray);
 682
 683                 // Refresh the `ListView`.  `setSelection` scrolls to the position of the folder that was edited.
 684                 updateBookmarksListView(currentFolder);
 685                 bookmarksListView.setSelection(selectedBookmarkPosition);
 686             }
 687         } else {  // Don't edit the folder because the new name is not unique.
 688             String cannot_rename_folder = getResources().getString(R.string.cannot_rename_folder) + " \"" + newFolderNameString + "\"";
 689             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), cannot_rename_folder, Snackbar.LENGTH_INDEFINITE).show();
 690         }
 691     }
 692
 693     private void updateBookmarksListView(String folderName) {
 694         // Get a `Cursor` with the current contents of the bookmarks database.
 695         bookmarksCursor = bookmarksDatabaseHandler.getAllBookmarksCursorByDisplayOrder(folderName);
 696
 697         // Setup `bookmarksCursorAdapter` with `this` context.  The `false` disables autoRequery.
 698         CursorAdapter bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
 699             @Override
 700             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 701                 // Inflate the individual item layout.  `false` does not attach it to the root.
 702                 return getLayoutInflater().inflate(R.layout.bookmarks_item_linearlayout, parent, false);
 703             }
 704
 705             @Override
 706             public void bindView(View view, Context context, Cursor cursor) {
 707                 // Get the favorite icon byte array from the `Cursor`.
 708                 byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHandler.FAVORITE_ICON));
 709
 710                 // Convert the byte array to a `Bitmap` beginning at the first byte and ending at the last.
 711                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
 712
 713                 // Display the bitmap in `bookmarkFavoriteIcon`.
 714                 ImageView bookmarkFavoriteIcon = (ImageView) view.findViewById(R.id.bookmark_favorite_icon);
 715                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
 716
 717
 718                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
 719                 String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHandler.BOOKMARK_NAME));
 720                 TextView bookmarkNameTextView = (TextView) view.findViewById(R.id.bookmark_name);
 721                 bookmarkNameTextView.setText(bookmarkNameString);
 722
 723                 // Make the font bold for folders.
 724                 if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHandler.IS_FOLDER)) == 1) {
 725                     // The first argument is `null` because we don't want to chage the font.
 726                     bookmarkNameTextView.setTypeface(null, Typeface.BOLD);
 727                 } else {  // Reset the font to default.
 728                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
 729                 }
 730             }
 731         };
 732
 733         // Update the ListView.
 734         bookmarksListView.setAdapter(bookmarksCursorAdapter);
 735
 736         // Set the AppBar title.
 737         if (currentFolder.isEmpty()) {
 738             appBar.setTitle(R.string.bookmarks);
 739         } else {
 740             appBar.setTitle(currentFolder);
 741         }
 742     }
 743
 744     private void updateBookmarksListViewExcept(long[] exceptIdLongArray, String folderName) {
 745         // Get a `Cursor` with the current contents of the bookmarks database except for the specified database IDs.
 746         bookmarksCursor = bookmarksDatabaseHandler.getBookmarksCursorExcept(exceptIdLongArray, folderName);
 747
 748         // Setup `bookmarksCursorAdapter` with `this` context.  The `false` disables autoRequery.
 749         CursorAdapter bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
 750             @Override
 751             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 752                 // Inflate the individual item layout.  `false` does not attach it to the root.
 753                 return getLayoutInflater().inflate(R.layout.bookmarks_item_linearlayout, parent, false);
 754             }
 755
 756             @Override
 757             public void bindView(View view, Context context, Cursor cursor) {
 758                 // Get the favorite icon byte array from the cursor.
 759                 byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHandler.FAVORITE_ICON));
 760
 761                 // Convert the byte array to a Bitmap beginning at the first byte and ending at the last.
 762                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
 763
 764                 // Display the bitmap in `bookmarkFavoriteIcon`.
 765                 ImageView bookmarkFavoriteIcon = (ImageView) view.findViewById(R.id.bookmark_favorite_icon);
 766                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
 767
 768
 769                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
 770                 String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHandler.BOOKMARK_NAME));
 771                 TextView bookmarkNameTextView = (TextView) view.findViewById(R.id.bookmark_name);
 772                 bookmarkNameTextView.setText(bookmarkNameString);
 773
 774                 // Make the font bold for folders.
 775                 if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHandler.IS_FOLDER)) == 1) {
 776                     // The first argument is `null` because we don't want to chage the font.
 777                     bookmarkNameTextView.setTypeface(null, Typeface.BOLD);
 778                 } else {  // Reset the font to default.
 779                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
 780                 }
 781             }
 782         };
 783
 784         // Update the ListView.
 785         bookmarksListView.setAdapter(bookmarksCursorAdapter);
 786     }
 787 }