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.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.support.design.widget.FloatingActionButton;
  34 import android.support.design.widget.Snackbar;
  35 import android.support.v4.app.NavUtils;
  36 import android.support.v4.content.ContextCompat;
  37 import android.support.v7.app.ActionBar;
  38 import android.support.v7.app.AppCompatActivity;
  39 import android.support.v7.widget.Toolbar;
  40 import android.util.SparseBooleanArray;
  41 import android.view.ActionMode;
  42 import android.view.Menu;
  43 import android.view.MenuItem;
  44 import android.view.View;
  45 import android.view.ViewGroup;
  46 import android.widget.AbsListView;
  47 import android.widget.AdapterView;
  48 import android.widget.CursorAdapter;
  49 import android.widget.EditText;
  50 import android.widget.ImageView;
  51 import android.widget.ListView;
  52 import android.widget.RadioButton;
  53 import android.widget.TextView;
  54
  55 import java.io.ByteArrayOutputStream;
  56
  57 public class BookmarksActivity extends AppCompatActivity implements CreateBookmark.CreateBookmarkListener,
  58         CreateBookmarkFolder.CreateBookmarkFolderListener, EditBookmark.EditBookmarkListener,
  59         EditBookmarkFolder.EditBookmarkFolderListener, MoveToFolder.MoveToFolderListener {
  60     // `bookmarksDatabaseHandler` is public static so it can be accessed from `EditBookmark` and `MoveToFolder`.  It is also used in `onCreate()`,
  61     // `onCreateBookmarkCreate()`, `updateBookmarksListView()`, and `updateBookmarksListViewExcept()`.
  62     public static BookmarksDatabaseHandler bookmarksDatabaseHandler;
  63
  64     // `bookmarksListView` is public static so it can be accessed from `EditBookmark`.
  65     // It is also used in `onCreate()`, `updateBookmarksListView()`, and `updateBookmarksListViewExcept()`.
  66     public static ListView bookmarksListView;
  67
  68     // `currentFolder` is public static so it can be accessed from `MoveToFolder`.
  69     // It is used in `onCreate`, `onOptionsItemSelected()`, `onCreateBookmarkCreate`, `onCreateBookmarkFolderCreate`, and `onEditBookmarkSave`.
  70     public static String currentFolder;
  71
  72     // `contextualActionMode` is used in `onCreate()` and `onEditBookmarkSave()`.
  73     private ActionMode contextualActionMode;
  74
  75     // `selectedBookmarkPosition` is used in `onCreate()` and `onEditBookarkSave()`.
  76     private int selectedBookmarkPosition;
  77
  78     // `appBar` is used in `onCreate()` and `updateBookmarksListView()`.
  79     private ActionBar appBar;
  80
  81     // `bookmarksCursor` is used in `onCreate()`, `updateBookmarksListView()`, and `updateBookmarksListViewExcept()`.
  82     private Cursor bookmarksCursor;
  83
  84     // `oldFolderName` is used in `onCreate()` and `onEditBookmarkFolderSave()`.
  85     private String oldFolderNameString;
  86
  87     @Override
  88     protected void onCreate(Bundle savedInstanceState) {
  89         super.onCreate(savedInstanceState);
  90         setContentView(R.layout.bookmarks_coordinatorlayout);
  91
  92         // We need to use the `SupportActionBar` from `android.support.v7.app.ActionBar` until the minimum API is >= 21.
  93         final Toolbar bookmarksAppBar = (Toolbar) findViewById(R.id.bookmarks_toolbar);
  94         setSupportActionBar(bookmarksAppBar);
  95
  96         // Display the home arrow on `SupportActionBar`.
  97         appBar = getSupportActionBar();
  98         assert appBar != null;// This assert removes the incorrect warning in Android Studio on the following line that appBar might be null.
  99         appBar.setDisplayHomeAsUpEnabled(true);
 100
 101
 102         // Initialize the database handler and the ListView.
 103         // `this` specifies the context.  The two `null`s do not specify the database name or a `CursorFactory`.
 104         // The `0` is to specify a database version, but that is set instead using a constant in `BookmarksDatabaseHandler`.
 105         bookmarksDatabaseHandler = new BookmarksDatabaseHandler(this, null, null, 0);
 106         bookmarksListView = (ListView) findViewById(R.id.bookmarks_listview);
 107
 108         // Set currentFolder to the home folder, which is null in the database.
 109         currentFolder = "";
 110
 111         // Display the bookmarks in the ListView.
 112         updateBookmarksListView(currentFolder);
 113
 114         // Set a listener so that tapping a list item loads the URL.  We need to store the activity
 115         // in a variable so that we can return to the parent activity after loading the URL.
 116         final Activity bookmarksActivity = this;
 117         bookmarksListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
 118             @Override
 119             public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
 120                 // Convert the id from long to int to match the format of the bookmarks database.
 121                 int databaseID = (int) id;
 122
 123                 // Get the bookmark `Cursor` and move it to the first row.
 124                 Cursor bookmarkCursor = bookmarksDatabaseHandler.getBookmarkCursor(databaseID);
 125                 bookmarkCursor.moveToFirst();
 126
 127                 // If the bookmark is a folder load its contents into the ListView.
 128                 if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHandler.IS_FOLDER)) == 1) {
 129                     // Update `currentFolder`.
 130                     currentFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHandler.BOOKMARK_NAME));
 131
 132                     // Reload the ListView with `currentFolder`.
 133                     updateBookmarksListView(currentFolder);
 134                 } else {  // Load the URL into `mainWebView`.
 135                     // Get the bookmark URL and assign it to formattedUrlString.
 136                     MainWebViewActivity.formattedUrlString = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHandler.BOOKMARK_URL));
 137
 138                     //  Load formattedUrlString and return to the main activity.
 139                     MainWebViewActivity.mainWebView.loadUrl(MainWebViewActivity.formattedUrlString);
 140                     NavUtils.navigateUpFromSameTask(bookmarksActivity);
 141                 }
 142
 143                 // Close the `Cursor`.
 144                 bookmarkCursor.close();
 145             }
 146         });
 147
 148         // `MultiChoiceModeListener` handles long clicks.
 149         bookmarksListView.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {
 150             // `moveBookmarkUpMenuItem` is used in `onCreateActionMode()` and `onItemCheckedStateChanged`.
 151             MenuItem moveBookmarkUpMenuItem;
 152
 153             // `moveBookmarkDownMenuItem` is used in `onCreateActionMode()` and `onItemCheckedStateChanged`.
 154             MenuItem moveBookmarkDownMenuItem;
 155
 156             // `editBookmarkMenuItem` is used in `onCreateActionMode()` and `onItemCheckedStateChanged`.
 157             MenuItem editBookmarkMenuItem;
 158
 159             // `selectAllBookmarks` is used in `onCreateActionMode()` and `onItemCheckedStateChanges`.
 160             MenuItem selectAllBookmarksMenuItem;
 161
 162             @Override
 163             public boolean onCreateActionMode(ActionMode mode, Menu menu) {
 164                 // Inflate the menu for the contextual app bar and set the title.
 165                 getMenuInflater().inflate(R.menu.bookmarks_context_menu, menu);
 166
 167                 // Set the title.
 168                 if (currentFolder.isEmpty()) {
 169                     // Use `R.string.bookmarks` if we are in the home folder.
 170                     mode.setTitle(R.string.bookmarks);
 171                 } else {  // Use the current folder name as the title.
 172                     mode.setTitle(currentFolder);
 173                 }
 174
 175                 // Get a handle for MenuItems we need to selectively disable.
 176                 moveBookmarkUpMenuItem = menu.findItem(R.id.move_bookmark_up);
 177                 moveBookmarkDownMenuItem = menu.findItem(R.id.move_bookmark_down);
 178                 editBookmarkMenuItem = menu.findItem(R.id.edit_bookmark);
 179                 selectAllBookmarksMenuItem = menu.findItem(R.id.context_menu_select_all_bookmarks);
 180
 181                 // Get a handle for `contextualActionMode` so we can close it programatically.
 182                 contextualActionMode = mode;
 183
 184                 return true;
 185             }
 186
 187             @Override
 188             public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
 189                 return false;
 190             }
 191
 192             @Override
 193             public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
 194                 // Get an array of the selected bookmarks.
 195                 long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 196
 197                 // Calculate the number of selected bookmarks.
 198                 int numberOfSelectedBookmarks = selectedBookmarksLongArray.length;
 199
 200                 // Sometimes Android forgets to close the contextual app bar when all the items are deselected.
 201                 if (numberOfSelectedBookmarks == 0) {
 202                     mode.finish();
 203                 }
 204
 205                 // List the number of selected bookmarks in the subtitle.
 206                 mode.setSubtitle(numberOfSelectedBookmarks + " " + getString(R.string.selected));
 207
 208                 if (numberOfSelectedBookmarks == 1) {
 209                     // Show the `Move Up`, `Move Down`, and  `Edit` option only if 1 bookmark is selected.
 210                     moveBookmarkUpMenuItem.setVisible(true);
 211                     moveBookmarkDownMenuItem.setVisible(true);
 212                     editBookmarkMenuItem.setVisible(true);
 213
 214                     // Get the database IDs for the bookmarks.
 215                     int selectedBookmarkDatabaseId = (int) selectedBookmarksLongArray[0];
 216                     int firstBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(0);
 217                     // bookmarksListView is 0 indexed.
 218                     int lastBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(bookmarksListView.getCount() - 1);
 219
 220                     // Disable `moveBookmarkUpMenuItem` if the selected bookmark is at the top of the ListView.
 221                     if (selectedBookmarkDatabaseId == firstBookmarkDatabaseId) {
 222                         moveBookmarkUpMenuItem.setEnabled(false);
 223                         moveBookmarkUpMenuItem.setIcon(R.drawable.move_bookmark_up_disabled);
 224                     } else {  // Otherwise enable `moveBookmarkUpMenuItem`.
 225                         moveBookmarkUpMenuItem.setEnabled(true);
 226                         moveBookmarkUpMenuItem.setIcon(R.drawable.move_bookmark_up_enabled);
 227                     }
 228
 229                     // Disable `moveBookmarkDownMenuItem` if the selected bookmark is at the bottom of the ListView.
 230                     if (selectedBookmarkDatabaseId == lastBookmarkDatabaseId) {
 231                         moveBookmarkDownMenuItem.setEnabled(false);
 232                         moveBookmarkDownMenuItem.setIcon(R.drawable.move_bookmark_down_disabled);
 233                     } else {  // Otherwise enable `moveBookmarkDownMenuItem`.
 234                         moveBookmarkDownMenuItem.setEnabled(true);
 235                         moveBookmarkDownMenuItem.setIcon(R.drawable.move_bookmark_down_enabled);
 236                     }
 237                 } else {  // Hide the MenuItems because more than one bookmark is selected.
 238                     moveBookmarkUpMenuItem.setVisible(false);
 239                     moveBookmarkDownMenuItem.setVisible(false);
 240                     editBookmarkMenuItem.setVisible(false);
 241                 }
 242
 243                 // Do not show `Select All` if all the bookmarks are already checked.
 244                 if (bookmarksListView.getCheckedItemIds().length == bookmarksListView.getCount()) {
 245                     selectAllBookmarksMenuItem.setVisible(false);
 246                 } else {
 247                     selectAllBookmarksMenuItem.setVisible(true);
 248                 }
 249             }
 250
 251             @Override
 252             public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
 253                 int menuItemId = item.getItemId();
 254
 255                 // `numberOfBookmarks` is used in `R.id.move_bookmark_up_enabled`, `R.id.move_bookmark_down_enabled`, and `R.id.context_menu_select_all_bookmarks`.
 256                 int numberOfBookmarks;
 257
 258                 // `selectedBookmarkLongArray` is used in `R.id.move_bookmark_up`, `R.id.move_bookmark_down`, and `R.id.edit_bookmark`.
 259                 long[]selectedBookmarkLongArray;
 260                 // `selectedBookmarkDatabaseId` is used in `R.id.move_bookmark_up`, `R.id.move_bookmark_down`, and `R.id.edit_bookmark`.
 261                 int selectedBookmarkDatabaseId;
 262                 // `selectedBookmarkNewPosition` is used in `R.id.move_bookmark_up` and `R.id.move_bookmark_down`.
 263                 int selectedBookmarkNewPosition;
 264                 // `bookmarkPositionSparseBooleanArray` is used in `R.id.edit_bookmark` and `R.id.delete_bookmark`.
 265                 SparseBooleanArray bookmarkPositionSparseBooleanArray;
 266
 267                 switch (menuItemId) {
 268                     case R.id.move_bookmark_up:
 269                         // Get the selected bookmark database ID.
 270                         selectedBookmarkLongArray = bookmarksListView.getCheckedItemIds();
 271                         selectedBookmarkDatabaseId = (int) selectedBookmarkLongArray[0];
 272
 273                         // Initialize `selectedBookmarkNewPosition`.
 274                         selectedBookmarkNewPosition = 0;
 275
 276                         for (int i = 0; i < bookmarksListView.getCount(); i++) {
 277                             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 278                             int nextBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i + 1);
 279
 280                             if (databaseId == selectedBookmarkDatabaseId || nextBookmarkDatabaseId == selectedBookmarkDatabaseId) {
 281                                 if (databaseId == selectedBookmarkDatabaseId) {
 282                                     // Move the selected bookmark up one and store the new bookmark position.
 283                                     bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i - 1);
 284                                     selectedBookmarkNewPosition = i - 1;
 285                                 } else {  // Move the bookmark above the selected bookmark down one.
 286                                     bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i + 1);
 287                                 }
 288                             } else {
 289                                 // Reset the rest of the bookmarks' DISPLAY_ORDER to match the position in the ListView.
 290                                 // This isn't necessary, but it clears out any stray values that might have crept into the database.
 291                                 bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i);
 292                             }
 293                         }
 294
 295                         // Refresh the ListView.
 296                         updateBookmarksListView(currentFolder);
 297
 298                         // Select the previously selected bookmark in the new location.
 299                         bookmarksListView.setItemChecked(selectedBookmarkNewPosition, true);
 300
 301                         bookmarksListView.setSelection(selectedBookmarkNewPosition - 5);
 302
 303                         break;
 304
 305                     case R.id.move_bookmark_down:
 306                         // Get the selected bookmark database ID.
 307                         selectedBookmarkLongArray = bookmarksListView.getCheckedItemIds();
 308                         selectedBookmarkDatabaseId = (int) selectedBookmarkLongArray[0];
 309
 310                         // Initialize `selectedBookmarkNewPosition`.
 311                         selectedBookmarkNewPosition = 0;
 312
 313                         for (int i = 0; i <bookmarksListView.getCount(); i++) {
 314                             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 315                             int previousBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i - 1);
 316
 317                             if (databaseId == selectedBookmarkDatabaseId || previousBookmarkDatabaseId == selectedBookmarkDatabaseId) {
 318                                 if (databaseId == selectedBookmarkDatabaseId) {
 319                                     // Move the selected bookmark down one and store the new bookmark position.
 320                                     bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i + 1);
 321                                     selectedBookmarkNewPosition = i + 1;
 322                                 } else {  // Move the bookmark below the selected bookmark up one.
 323                                     bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i - 1);
 324                                 }
 325                             } else {
 326                                 // Reset the rest of the bookmark' DISPLAY_ORDER to match the position in the ListView.
 327                                 // This isn't necessary, but it clears out any stray values that might have crept into the database.
 328                                 bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i);
 329                             }
 330                         }
 331
 332                         // Refresh the ListView.
 333                         updateBookmarksListView(currentFolder);
 334
 335                         // Select the previously selected bookmark in the new location.
 336                         bookmarksListView.setItemChecked(selectedBookmarkNewPosition, true);
 337
 338                         bookmarksListView.setSelection(selectedBookmarkNewPosition - 5);
 339                         break;
 340
 341                     case R.id.move_to_folder:
 342                         // Show the `MoveToFolder` `AlertDialog` and name the instance `@string/move_to_folder
 343                         DialogFragment moveToFolderDialog = new MoveToFolder();
 344                         moveToFolderDialog.show(getFragmentManager(), getResources().getString(R.string.move_to_folder));
 345                         break;
 346
 347                     case R.id.edit_bookmark:
 348                         // Get a handle for `selectedBookmarkPosition` so we can scroll to it after refreshing the ListView.
 349                         bookmarkPositionSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 350                         for (int i = 0; i < bookmarkPositionSparseBooleanArray.size(); i++) {
 351                             // Find the bookmark that is selected and save the position to `selectedBookmarkPosition`.
 352                             if (bookmarkPositionSparseBooleanArray.valueAt(i))
 353                                 selectedBookmarkPosition = bookmarkPositionSparseBooleanArray.keyAt(i);
 354                         }
 355
 356                         // Move to the selected database ID and find out if it is a folder.
 357                         bookmarksCursor.moveToPosition(selectedBookmarkPosition);
 358                         boolean isFolder = (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHandler.IS_FOLDER)) == 1);
 359
 360                         if (isFolder) {
 361                             // Save the current folder name.
 362                             oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHandler.BOOKMARK_NAME));
 363
 364                             // Show the `EditBookmarkFolder` `AlertDialog` and name the instance `@string/edit_folder`.
 365                             DialogFragment editFolderDialog = new EditBookmarkFolder();
 366                             editFolderDialog.show(getFragmentManager(), getResources().getString(R.string.edit_folder));
 367                         } else {
 368                             // Show the `EditBookmark` `AlertDialog` and name the instance `@string/edit_bookmark`.
 369                             DialogFragment editBookmarkDialog = new EditBookmark();
 370                             editBookmarkDialog.show(getFragmentManager(), getResources().getString(R.string.edit_bookmark));
 371                         }
 372                         break;
 373
 374                     case R.id.delete_bookmark:
 375                         // Get an array of the selected rows.
 376                         final long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 377
 378                         // Get a handle for `selectedBookmarkPosition` so we can scroll to it after refreshing the ListView.
 379                         bookmarkPositionSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
 380                         for (int i = 0; i < bookmarkPositionSparseBooleanArray.size(); i++) {
 381                             // Find the bookmark that is selected and save the position to `selectedBookmarkPosition`.
 382                             if (bookmarkPositionSparseBooleanArray.valueAt(i))
 383                                 selectedBookmarkPosition = bookmarkPositionSparseBooleanArray.keyAt(i);
 384                         }
 385
 386                         updateBookmarksListViewExcept(selectedBookmarksLongArray, currentFolder);
 387
 388                         // Scroll to where the deleted bookmark was located.
 389                         bookmarksListView.setSelection(selectedBookmarkPosition - 5);
 390
 391                         String snackbarMessage;
 392
 393                         // Determine how many items are in the array and prepare an appropriate Snackbar message.
 394                         if (selectedBookmarksLongArray.length == 1) {
 395                             snackbarMessage = getString(R.string.one_bookmark_deleted);
 396                         } else {
 397                             snackbarMessage = selectedBookmarksLongArray.length + " " + getString(R.string.bookmarks_deleted);
 398                         }
 399
 400                         // Show a SnackBar.
 401                         Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), snackbarMessage, Snackbar.LENGTH_LONG)
 402                                 .setAction(R.string.undo, new View.OnClickListener() {
 403                                     @Override
 404                                     public void onClick(View view) {
 405                                         // Do nothing because everything will be handled by `onDismissed()` below.
 406                                     }
 407                                 })
 408                                 .setCallback(new Snackbar.Callback() {
 409                                     @Override
 410                                     public void onDismissed(Snackbar snackbar, int event) {
 411                                         switch (event) {
 412                                             // The user pushed the "Undo" button.
 413                                             case Snackbar.Callback.DISMISS_EVENT_ACTION:
 414                                                 // Refresh the ListView to show the rows again.
 415                                                 updateBookmarksListView(currentFolder);
 416
 417                                                 // Scroll to where the deleted bookmark was located.
 418                                                 bookmarksListView.setSelection(selectedBookmarkPosition - 5);
 419
 420                                                 break;
 421
 422                                             // The Snackbar was dismissed without the "Undo" button being pushed.
 423                                             default:
 424                                                 // Delete each selected row.
 425                                                 for (long databaseIdLong : selectedBookmarksLongArray) {
 426                                                     // Convert `databaseIdLong` to an int.
 427                                                     int databaseIdInt = (int) databaseIdLong;
 428
 429                                                     if (bookmarksDatabaseHandler.isFolder(databaseIdInt)) {
 430                                                         deleteBookmarkFolderContents(databaseIdInt);
 431                                                     }
 432
 433                                                     // Delete `databaseIdInt`.
 434                                                     bookmarksDatabaseHandler.deleteBookmark(databaseIdInt);
 435                                                 }
 436                                                 break;
 437                                         }
 438                                     }
 439                                 })
 440                                 .show();
 441
 442                         // Close the contextual app bar.
 443                         mode.finish();
 444                         break;
 445
 446                     case R.id.context_menu_select_all_bookmarks:
 447                         numberOfBookmarks = bookmarksListView.getCount();
 448
 449                         for (int i = 0; i < numberOfBookmarks; i++) {
 450                             bookmarksListView.setItemChecked(i, true);
 451                         }
 452                         break;
 453                 }
 454                 // Consume the click.
 455                 return true;
 456             }
 457
 458             @Override
 459             public void onDestroyActionMode(ActionMode mode) {
 460
 461             }
 462         });
 463
 464         // Set a FloatingActionButton for creating new bookmarks.
 465         FloatingActionButton createBookmarkFAB = (FloatingActionButton) findViewById(R.id.create_bookmark_fab);
 466         assert createBookmarkFAB != null;
 467         createBookmarkFAB.setOnClickListener(new View.OnClickListener() {
 468             @Override
 469             public void onClick(View view) {
 470                 // Show the `CreateBookmark` `AlertDialog` and name the instance `@string/create_bookmark`.
 471                 DialogFragment createBookmarkDialog = new CreateBookmark();
 472                 createBookmarkDialog.show(getFragmentManager(), getResources().getString(R.string.create_bookmark));
 473             }
 474         });
 475     }
 476
 477     @Override
 478     public boolean onCreateOptionsMenu(Menu menu) {
 479         //Inflate the menu.
 480         getMenuInflater().inflate(R.menu.bookmarks_options_menu, menu);
 481
 482         return true;
 483     }
 484
 485     @Override
 486     public boolean onPrepareOptionsMenu(Menu menu) {
 487         super.onPrepareOptionsMenu(menu);
 488
 489         return true;
 490     }
 491
 492     @Override
 493     public boolean onOptionsItemSelected(MenuItem menuItem) {
 494         int menuItemId = menuItem.getItemId();
 495
 496         switch (menuItemId) {
 497             case android.R.id.home:
 498                 // Exit BookmarksActivity if currently at the home folder.
 499                 if (currentFolder.isEmpty()) {
 500                     NavUtils.navigateUpFromSameTask(this);
 501                 } else {  // Navigate up one folder.
 502                     // Place the former parent folder in `currentFolder`.
 503                     currentFolder = bookmarksDatabaseHandler.getParentFolder(currentFolder);
 504
 505                     updateBookmarksListView(currentFolder);
 506                 }
 507                 break;
 508
 509             case R.id.create_folder:
 510                 // Show the `CreateBookmarkFolder` `AlertDialog` and name the instance `@string/create_folder`.
 511                 DialogFragment createBookmarkFolderDialog = new CreateBookmarkFolder();
 512                 createBookmarkFolderDialog.show(getFragmentManager(), getResources().getString(R.string.create_folder));
 513                 break;
 514
 515             case R.id.options_menu_select_all_bookmarks:
 516                 int numberOfBookmarks = bookmarksListView.getCount();
 517
 518                 for (int i = 0; i < numberOfBookmarks; i++) {
 519                     bookmarksListView.setItemChecked(i, true);
 520                 }
 521                 break;
 522
 523             case R.id.bookmarks_database_view:
 524                 // Launch `BookmarksDatabaseViewActivity`.
 525                 Intent bookmarksDatabaseViewIntent = new Intent(this, BookmarksDatabaseViewActivity.class);
 526                 startActivity(bookmarksDatabaseViewIntent);
 527                 break;
 528         }
 529         return true;
 530     }
 531
 532     @Override
 533     public void onCancelCreateBookmark(DialogFragment dialogFragment) {
 534         // Do nothing because the user selected `Cancel`.
 535     }
 536
 537     @Override
 538     public void onCreateBookmark(DialogFragment dialogFragment) {
 539         // Get the `EditText`s from the `createBookmarkDialogFragment` and extract the strings.
 540         EditText createBookmarkNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
 541         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
 542         EditText createBookmarkUrlEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
 543         String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
 544
 545         // Convert the favoriteIcon Bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
 546         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 547         MainWebViewActivity.favoriteIcon.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
 548         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
 549
 550         // Display the new bookmark below the current items in the (0 indexed) list.
 551         int newBookmarkDisplayOrder = bookmarksListView.getCount();
 552
 553         // Create the bookmark.
 554         bookmarksDatabaseHandler.createBookmark(bookmarkNameString, bookmarkUrlString, newBookmarkDisplayOrder, currentFolder, favoriteIconByteArray);
 555
 556         // Refresh the ListView.  `setSelection` scrolls to the bottom of the list.
 557         updateBookmarksListView(currentFolder);
 558         bookmarksListView.setSelection(newBookmarkDisplayOrder);
 559     }
 560
 561     @Override
 562     public void onCancelCreateBookmarkFolder(DialogFragment dialogFragment) {
 563         // Do nothing because the user selected `Cancel`.
 564     }
 565
 566     @Override
 567     public void onCreateBookmarkFolder(DialogFragment dialogFragment) {
 568         // Get `create_folder_name_edit_text` and extract the string.
 569         EditText createFolderNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_folder_name_edittext);
 570         String folderNameString = createFolderNameEditText.getText().toString();
 571
 572         // Check to see if the folder already exists.
 573         Cursor bookmarkFolderCursor = bookmarksDatabaseHandler.getFolderCursor(folderNameString);
 574         int existingFoldersWithNewName = bookmarkFolderCursor.getCount();
 575         bookmarkFolderCursor.close();
 576         if (folderNameString.isEmpty() || (existingFoldersWithNewName > 0)) {
 577             String cannotCreateFolder = getResources().getString(R.string.cannot_create_folder) + " \"" + folderNameString + "\"";
 578             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), cannotCreateFolder, Snackbar.LENGTH_INDEFINITE).show();
 579         } else {  // Create the folder.
 580             // Get the new folder icon.
 581             RadioButton defaultFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon_radiobuttion);
 582             Bitmap folderIconBitmap;
 583             if (defaultFolderIconRadioButton.isChecked()) {
 584                 // Get the default folder icon drawable and convert it to a `Bitmap`.  `this` specifies the current context.
 585                 Drawable folderIconDrawable = ContextCompat.getDrawable(this, R.drawable.folder_blue_bitmap);
 586                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 587                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 588             } else {
 589                 folderIconBitmap = MainWebViewActivity.favoriteIcon;
 590             }
 591
 592             // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
 593             ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 594             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 595             byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 596
 597             // Move all the bookmarks down one in the display order.
 598             for (int i = 0; i < bookmarksListView.getCount(); i++) {
 599                 int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
 600                 bookmarksDatabaseHandler.updateBookmarkDisplayOrder(databaseId, i + 1);
 601             }
 602
 603             // Create the folder, placing it at the top of the ListView
 604             bookmarksDatabaseHandler.createFolder(folderNameString, 0, currentFolder, folderIconByteArray);
 605
 606             // Refresh the ListView.
 607             updateBookmarksListView(currentFolder);
 608         }
 609     }
 610
 611     @Override
 612     public void onCancelEditBookmark(DialogFragment dialogFragment) {
 613         // Do nothing because the user selected `Cancel`.
 614     }
 615
 616     @Override
 617     public void onSaveEditBookmark(DialogFragment dialogFragment) {
 618         // Get a long array with the the databaseId of the selected bookmark and convert it to an `int`.
 619         long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 620         int selectedBookmarkDatabaseId = (int) selectedBookmarksLongArray[0];
 621
 622         // Get the `EditText`s from the `editBookmarkDialogFragment` and extract the strings.
 623         EditText editBookmarkNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
 624         String bookmarkNameString = editBookmarkNameEditText.getText().toString();
 625         EditText editBookmarkUrlEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
 626         String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
 627
 628         // Get `edit_bookmark_current_icon_radiobutton`.
 629         RadioButton currentBookmarkIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
 630
 631         if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
 632             bookmarksDatabaseHandler.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
 633         } else {  // Update the bookmark and the favorite icon.
 634             // Get the new favorite icon from the `Dialog` and convert it into a `Bitmap`.
 635             ImageView newFavoriteIconImageView = (ImageView) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_web_page_favorite_icon);
 636             Drawable newFavoriteIconDrawable = newFavoriteIconImageView.getDrawable();
 637             Bitmap newFavoriteIconBitmap = ((BitmapDrawable) newFavoriteIconDrawable).getBitmap();
 638
 639             // Convert `newFavoriteIconBitmap` into a Byte Array.
 640             ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
 641             newFavoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
 642             byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
 643
 644             //  Update the bookmark and the favorite icon.
 645             bookmarksDatabaseHandler.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
 646         }
 647
 648         // Close the contextual action mode.
 649         contextualActionMode.finish();
 650
 651         // Refresh the `ListView`.  `setSelection` scrolls to the position of the bookmark that was edited.
 652         updateBookmarksListView(currentFolder);
 653         bookmarksListView.setSelection(selectedBookmarkPosition);
 654     }
 655
 656     @Override
 657     public void onCancelEditBookmarkFolder(DialogFragment dialogFragment) {
 658         // Do nothing because the user selected `Cancel`.
 659     }
 660
 661     @Override
 662     public void onSaveEditBookmarkFolder(DialogFragment dialogFragment) {
 663         // Get the new folder name.
 664         EditText editFolderNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
 665         String newFolderNameString = editFolderNameEditText.getText().toString();
 666
 667         // Check to see if the new folder name is unique.
 668         Cursor bookmarkFolderCursor = bookmarksDatabaseHandler.getFolderCursor(newFolderNameString);
 669         int existingFoldersWithNewName = bookmarkFolderCursor.getCount();
 670         bookmarkFolderCursor.close();
 671         if ( ((existingFoldersWithNewName == 0) || newFolderNameString.equals(oldFolderNameString)) && !newFolderNameString.isEmpty()) {
 672             // Get a long array with the the database ID of the selected folder and convert it to an `int`.
 673             long[] selectedFolderLongArray = bookmarksListView.getCheckedItemIds();
 674             int selectedFolderDatabaseId = (int) selectedFolderLongArray[0];
 675
 676             // Get the `RadioButtons` from the `Dialog`.
 677             RadioButton currentFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
 678             RadioButton defaultFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
 679             Bitmap folderIconBitmap;
 680
 681             // Prepare the favorite icon.
 682             if (currentFolderIconRadioButton.isChecked()) {
 683                 // Update the folder name if it has changed.
 684                 if (!newFolderNameString.equals(oldFolderNameString)) {
 685                     bookmarksDatabaseHandler.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
 686
 687                     // Refresh the `ListView`.  `setSelection` scrolls to the position of the folder that was edited.
 688                     updateBookmarksListView(currentFolder);
 689                     bookmarksListView.setSelection(selectedBookmarkPosition);
 690                 }
 691             } else {  // Prepare the new favorite icon.
 692                 if (defaultFolderIconRadioButton.isChecked()) {
 693                     // Get the default folder icon drawable and convert it to a `Bitmap`.  `this` specifies the current context.
 694                     Drawable folderIconDrawable = ContextCompat.getDrawable(this, R.drawable.folder_blue_bitmap);
 695                     BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
 696                     folderIconBitmap = folderIconBitmapDrawable.getBitmap();
 697                 } else {  // Use the web page favorite icon.
 698                     folderIconBitmap = MainWebViewActivity.favoriteIcon;
 699                 }
 700
 701                 // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
 702                 ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
 703                 folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
 704                 byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
 705
 706                 bookmarksDatabaseHandler.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, folderIconByteArray);
 707
 708                 // Refresh the `ListView`.  `setSelection` scrolls to the position of the folder that was edited.
 709                 updateBookmarksListView(currentFolder);
 710                 bookmarksListView.setSelection(selectedBookmarkPosition);
 711             }
 712         } else {  // Don't edit the folder because the new name is not unique.
 713             String cannot_rename_folder = getResources().getString(R.string.cannot_rename_folder) + " \"" + newFolderNameString + "\"";
 714             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), cannot_rename_folder, Snackbar.LENGTH_INDEFINITE).show();
 715         }
 716
 717         // Close the contextual action mode.
 718         contextualActionMode.finish();
 719     }
 720
 721     @Override
 722     public void onCancelMoveToFolder(DialogFragment dialogFragment) {
 723         // Do nothing because the user selected `Cancel`.
 724     }
 725
 726     @Override
 727     public void onMoveToFolder(DialogFragment dialogFragment) {
 728         // Get the new folder database id.
 729         ListView folderListView = (ListView) dialogFragment.getDialog().findViewById(R.id.move_to_folder_listview);
 730         long[] newFolderLongArray = folderListView.getCheckedItemIds();
 731
 732         if (newFolderLongArray.length == 0) {  // No new folder was selected.
 733             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), getString(R.string.cannot_move_bookmarks), Snackbar.LENGTH_LONG).show();
 734         } else {  // Move the selected bookmarks.
 735             // Get the new folder database ID.
 736             int newFolderDatabaseId = (int) newFolderLongArray[0];
 737
 738             // Instantiate `newFolderName`.
 739             String newFolderName;
 740
 741             if (newFolderDatabaseId == 0) {
 742                 // The new folder is the home folder, represented as `""` in the database.
 743                 newFolderName = "";
 744             } else {
 745                 // Get the new folder name from the database.
 746                 newFolderName = bookmarksDatabaseHandler.getFolderName(newFolderDatabaseId);
 747             }
 748
 749             // Get a long array with the the database ID of the selected bookmarks.
 750             long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
 751             for (long databaseIdLong : selectedBookmarksLongArray) {
 752                 // Get `databaseIdInt` for each selected bookmark.
 753                 int databaseIdInt = (int) databaseIdLong;
 754
 755                 // Move the selected bookmark to the new folder.
 756                 bookmarksDatabaseHandler.moveToFolder(databaseIdInt, newFolderName);
 757             }
 758
 759             // Refresh the `ListView`.
 760             updateBookmarksListView(currentFolder);
 761
 762             // Close the contextual app bar.
 763             contextualActionMode.finish();
 764         }
 765     }
 766
 767     private void updateBookmarksListView(String folderName) {
 768         // Get a `Cursor` with the current contents of the bookmarks database.
 769         bookmarksCursor = bookmarksDatabaseHandler.getAllBookmarksCursorByDisplayOrder(folderName);
 770
 771         // Setup `bookmarksCursorAdapter` with `this` context.  `false` disables autoRequery.
 772         CursorAdapter bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
 773             @Override
 774             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 775                 // Inflate the individual item layout.  `false` does not attach it to the root.
 776                 return getLayoutInflater().inflate(R.layout.bookmarks_item_linearlayout, parent, false);
 777             }
 778
 779             @Override
 780             public void bindView(View view, Context context, Cursor cursor) {
 781                 // Get the favorite icon byte array from the `Cursor`.
 782                 byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHandler.FAVORITE_ICON));
 783
 784                 // Convert the byte array to a `Bitmap` beginning at the first byte and ending at the last.
 785                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
 786
 787                 // Display the bitmap in `bookmarkFavoriteIcon`.
 788                 ImageView bookmarkFavoriteIcon = (ImageView) view.findViewById(R.id.bookmark_favorite_icon);
 789                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
 790
 791
 792                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
 793                 String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHandler.BOOKMARK_NAME));
 794                 TextView bookmarkNameTextView = (TextView) view.findViewById(R.id.bookmark_name);
 795                 bookmarkNameTextView.setText(bookmarkNameString);
 796
 797                 // Make the font bold for folders.
 798                 if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHandler.IS_FOLDER)) == 1) {
 799                     // The first argument is `null` because we don't want to chage the font.
 800                     bookmarkNameTextView.setTypeface(null, Typeface.BOLD);
 801                 } else {  // Reset the font to default.
 802                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
 803                 }
 804             }
 805         };
 806
 807         // Update the ListView.
 808         bookmarksListView.setAdapter(bookmarksCursorAdapter);
 809
 810         // Set the AppBar title.
 811         if (currentFolder.isEmpty()) {
 812             appBar.setTitle(R.string.bookmarks);
 813         } else {
 814             appBar.setTitle(currentFolder);
 815         }
 816     }
 817
 818     private void updateBookmarksListViewExcept(long[] exceptIdLongArray, String folderName) {
 819         // Get a `Cursor` with the current contents of the bookmarks database except for the specified database IDs.
 820         bookmarksCursor = bookmarksDatabaseHandler.getBookmarksCursorExcept(exceptIdLongArray, folderName);
 821
 822         // Setup `bookmarksCursorAdapter` with `this` context.  `false` disables autoRequery.
 823         CursorAdapter bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
 824             @Override
 825             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 826                 // Inflate the individual item layout.  `false` does not attach it to the root.
 827                 return getLayoutInflater().inflate(R.layout.bookmarks_item_linearlayout, parent, false);
 828             }
 829
 830             @Override
 831             public void bindView(View view, Context context, Cursor cursor) {
 832                 // Get the favorite icon byte array from the cursor.
 833                 byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHandler.FAVORITE_ICON));
 834
 835                 // Convert the byte array to a Bitmap beginning at the first byte and ending at the last.
 836                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
 837
 838                 // Display the bitmap in `bookmarkFavoriteIcon`.
 839                 ImageView bookmarkFavoriteIcon = (ImageView) view.findViewById(R.id.bookmark_favorite_icon);
 840                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
 841
 842
 843                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
 844                 String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHandler.BOOKMARK_NAME));
 845                 TextView bookmarkNameTextView = (TextView) view.findViewById(R.id.bookmark_name);
 846                 bookmarkNameTextView.setText(bookmarkNameString);
 847
 848                 // Make the font bold for folders.
 849                 if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHandler.IS_FOLDER)) == 1) {
 850                     // The first argument is `null` because we don't want to chage the font.
 851                     bookmarkNameTextView.setTypeface(null, Typeface.BOLD);
 852                 } else {  // Reset the font to default.
 853                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
 854                 }
 855             }
 856         };
 857
 858         // Update the ListView.
 859         bookmarksListView.setAdapter(bookmarksCursorAdapter);
 860     }
 861
 862     private void deleteBookmarkFolderContents(int databaseId) {
 863         // Get the name of the folder.
 864         String folderName = bookmarksDatabaseHandler.getFolderName(databaseId);
 865
 866         // Get the contents of the folder.
 867         Cursor folderCursor = bookmarksDatabaseHandler.getAllBookmarksCursorByDisplayOrder(folderName);
 868
 869         for (int i = 0; i < folderCursor.getCount(); i++) {
 870             // Move `folderCursor` to the current row.
 871             folderCursor.moveToPosition(i);
 872
 873             // Get the database ID of the item.
 874             int itemDatabaseId = folderCursor.getInt(folderCursor.getColumnIndex(BookmarksDatabaseHandler._ID));
 875
 876             // If this is a folder, delete the contents first.
 877             if (bookmarksDatabaseHandler.isFolder(itemDatabaseId)) {
 878                 deleteBookmarkFolderContents(itemDatabaseId);
 879             }
 880
 881             bookmarksDatabaseHandler.deleteBookmark(itemDatabaseId);
 882         }
 883     }
 884 }