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

   1 /*
   2  * Copyright © 2017-2021 Soren Stoutner <soren@stoutner.com>.
   3  *
   4  * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
   5  *
   6  * Privacy Browser is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * Privacy Browser is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 package com.stoutner.privacybrowser.activities;
  21
  22 import android.app.Activity;
  23 import android.content.Context;
  24 import android.content.Intent;
  25 import android.content.SharedPreferences;
  26 import android.content.res.Configuration;
  27 import android.content.res.Resources;
  28 import android.database.Cursor;
  29 import android.os.Bundle;
  30 import android.os.Handler;
  31 import android.preference.PreferenceManager;
  32 import android.view.Menu;
  33 import android.view.MenuItem;
  34 import android.view.View;
  35 import android.view.ViewGroup;
  36 import android.view.WindowManager;
  37 import android.widget.CursorAdapter;
  38 import android.widget.EditText;
  39 import android.widget.ListView;
  40 import android.widget.RadioButton;
  41 import android.widget.ScrollView;
  42 import android.widget.Spinner;
  43 import android.widget.TextView;
  44
  45 import androidx.annotation.NonNull;
  46 import androidx.appcompat.app.ActionBar;
  47 import androidx.appcompat.app.AppCompatActivity;
  48 import androidx.appcompat.widget.SwitchCompat;
  49 import androidx.appcompat.widget.Toolbar;
  50 import androidx.core.app.NavUtils;
  51 import androidx.fragment.app.DialogFragment;
  52 import androidx.fragment.app.FragmentManager;
  53
  54 import com.google.android.material.floatingactionbutton.FloatingActionButton;
  55 import com.google.android.material.snackbar.Snackbar;
  56
  57 import com.stoutner.privacybrowser.R;
  58 import com.stoutner.privacybrowser.dialogs.AddDomainDialog;
  59 import com.stoutner.privacybrowser.fragments.DomainSettingsFragment;
  60 import com.stoutner.privacybrowser.fragments.DomainsListFragment;
  61 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
  62
  63 import java.util.Objects;
  64
  65 public class DomainsActivity extends AppCompatActivity implements AddDomainDialog.AddDomainListener, DomainsListFragment.DismissSnackbarInterface {
  66     // Define the public static variables.
  67     public static int domainsListViewPosition;
  68     public static boolean twoPanedMode;
  69     public static int currentDomainDatabaseId;
  70     public static MenuItem deleteMenuItem;
  71     public static boolean dismissingSnackbar;
  72
  73     // The SSL certificate and IP address information are accessed from `DomainSettingsFragment` and `saveDomainSettings()`.
  74     public static String sslIssuedToCName;
  75     public static String sslIssuedToOName;
  76     public static String sslIssuedToUName;
  77     public static String sslIssuedByCName;
  78     public static String sslIssuedByOName;
  79     public static String sslIssuedByUName;
  80     public static long sslStartDateLong;
  81     public static long sslEndDateLong;
  82     public static String currentIpAddresses;
  83
  84
  85     // Initialize the class constants.
  86     private final String LISTVIEW_POSITION = "listview_position";
  87     private final String DOMAIN_SETTINGS_DISPLAYED = "domain_settings_displayed";
  88     private final String DOMAIN_SETTINGS_DATABASE_ID = "domain_settings_database_is";
  89     private final String DOMAIN_SETTINGS_SCROLL_Y = "domain_settings_scroll_y";
  90
  91     // Initialize the class variables.
  92     private boolean restartAfterRotate;
  93     private boolean domainSettingsDisplayedBeforeRotate;
  94     private int domainSettingsDatabaseIdBeforeRotate;
  95     private int domainSettingsScrollY = 0;
  96
  97     // Defile the class views.
  98     private ListView domainsListView;
  99
 100     // `closeActivityAfterDismissingSnackbar` is used in `onOptionsItemSelected()`, and `onBackPressed()`.
 101     private boolean closeActivityAfterDismissingSnackbar;
 102
 103     // The undelete snackbar is used in `onOptionsItemSelected()` and `onBackPressed()`.
 104     private Snackbar undoDeleteSnackbar;
 105
 106     // `domainsDatabaseHelper` is used in `onCreate()`, `saveDomainSettings()`, and `onDestroy()`.
 107     private static DomainsDatabaseHelper domainsDatabaseHelper;
 108
 109     // `addDomainFAB` is used in `onCreate()`, `onCreateOptionsMenu()`, `onOptionsItemSelected()`, and `onBackPressed()`.
 110     private FloatingActionButton addDomainFAB;
 111
 112     // `deletedDomainPosition` is used in an inner and outer class in `onOptionsItemSelected()`.
 113     private int deletedDomainPosition;
 114
 115     // `goDirectlyToDatabaseId` is used in `onCreate()` and `onCreateOptionsMenu()`.
 116     private int goDirectlyToDatabaseId;
 117
 118     // `closeOnBack` is used in `onCreate()`, `onOptionsItemSelected()` and `onBackPressed()`.
 119     private boolean closeOnBack;
 120
 121     // `coordinatorLayout` is use in `onCreate()`, `onOptionsItemSelected()`, and `onSaveInstanceState()`.
 122     private View coordinatorLayout;
 123
 124     // `resources` is used in `onCreate()`, `onOptionsItemSelected()`, and `onSaveInstanceState()`.
 125     private Resources resources;
 126
 127     @Override
 128     protected void onCreate(Bundle savedInstanceState) {
 129         // Get a handle for the shared preferences.
 130         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 131
 132         // Get the preferences.
 133         boolean allowScreenshots = sharedPreferences.getBoolean(getString(R.string.allow_screenshots_key), false);
 134         boolean bottomAppBar = sharedPreferences.getBoolean(getString(R.string.bottom_app_bar_key), false);
 135
 136         // Disable screenshots if not allowed.
 137         if (!allowScreenshots) {
 138             getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
 139         }
 140
 141         // Set the theme.
 142         setTheme(R.style.PrivacyBrowser);
 143
 144         // Run the default commands.
 145         super.onCreate(savedInstanceState);
 146
 147         // Initialize the domains listview position.
 148         domainsListViewPosition = 0;
 149
 150         // Extract the values from the saved instance state if it is not null.
 151         if (savedInstanceState != null) {
 152             domainsListViewPosition = savedInstanceState.getInt(LISTVIEW_POSITION);
 153             restartAfterRotate = true;
 154             domainSettingsDisplayedBeforeRotate = savedInstanceState.getBoolean(DOMAIN_SETTINGS_DISPLAYED);
 155             domainSettingsDatabaseIdBeforeRotate = savedInstanceState.getInt(DOMAIN_SETTINGS_DATABASE_ID);
 156             domainSettingsScrollY = savedInstanceState.getInt(DOMAIN_SETTINGS_SCROLL_Y);
 157         }
 158
 159         // Get the launching intent
 160         Intent intent = getIntent();
 161
 162         // Extract the domain to load if there is one.  `-1` is the default value.
 163         goDirectlyToDatabaseId = intent.getIntExtra("load_domain", -1);
 164
 165         // Get the status of close-on-back, which is true when the domains activity is called from the options menu.
 166         closeOnBack = intent.getBooleanExtra("close_on_back", false);
 167
 168         // Get the current URL.
 169         String currentUrl = intent.getStringExtra("current_url");
 170
 171         // Store the current SSL certificate information in class variables.
 172         sslIssuedToCName = intent.getStringExtra("ssl_issued_to_cname");
 173         sslIssuedToOName = intent.getStringExtra("ssl_issued_to_oname");
 174         sslIssuedToUName = intent.getStringExtra("ssl_issued_to_uname");
 175         sslIssuedByCName = intent.getStringExtra("ssl_issued_by_cname");
 176         sslIssuedByOName = intent.getStringExtra("ssl_issued_by_oname");
 177         sslIssuedByUName = intent.getStringExtra("ssl_issued_by_uname");
 178         sslStartDateLong = intent.getLongExtra("ssl_start_date", 0);
 179         sslEndDateLong = intent.getLongExtra("ssl_end_date", 0);
 180         currentIpAddresses = intent.getStringExtra("current_ip_addresses");
 181
 182         // Set the view.
 183         if (bottomAppBar) {
 184             setContentView(R.layout.domains_coordinatorlayout_bottom_appbar);
 185         } else {
 186             setContentView(R.layout.domains_coordinatorlayout_top_appbar);
 187         }
 188
 189         // Populate the class variables.
 190         coordinatorLayout = findViewById(R.id.domains_coordinatorlayout);
 191         resources = getResources();
 192
 193         // `SupportActionBar` from `android.support.v7.app.ActionBar` must be used until the minimum API is >= 21.
 194         final Toolbar toolbar = findViewById(R.id.domains_toolbar);
 195         setSupportActionBar(toolbar);
 196
 197         // Get a handle for the action bar.
 198         ActionBar actionBar = getSupportActionBar();
 199
 200         // Remove the incorrect lint warning that the action bar might be null.
 201         assert actionBar != null;
 202
 203         // Set the back arrow on the action bar.
 204         actionBar.setDisplayHomeAsUpEnabled(true);
 205
 206         // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
 207         domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
 208
 209         // Determine if we are in two pane mode.  `domain_settings_fragment_container` does not exist on devices with a width less than 900dp.
 210         twoPanedMode = (findViewById(R.id.domain_settings_fragment_container) != null);
 211
 212         // Get a handle for the add domain floating action button.
 213         addDomainFAB = findViewById(R.id.add_domain_fab);
 214
 215         // Configure the add domain floating action button.
 216         addDomainFAB.setOnClickListener((View view) -> {
 217             // Remove the incorrect warning below that the current URL might be null.
 218             assert currentUrl != null;
 219
 220             // Create an add domain dialog.
 221             DialogFragment addDomainDialog = AddDomainDialog.addDomain(currentUrl);
 222
 223             // Show the add domain dialog.
 224             addDomainDialog.show(getSupportFragmentManager(), resources.getString(R.string.add_domain));
 225         });
 226     }
 227
 228     @Override
 229     public boolean onCreateOptionsMenu(Menu menu) {
 230         // Inflate the menu.
 231         getMenuInflater().inflate(R.menu.domains_options_menu, menu);
 232
 233         // Store `deleteMenuItem` for future use.
 234         deleteMenuItem = menu.findItem(R.id.delete_domain);
 235
 236         // Only display `deleteMenuItem` (initially) in two-paned mode.
 237         deleteMenuItem.setVisible(twoPanedMode);
 238
 239         // Get a handle for the fragment manager.
 240         FragmentManager fragmentManager = getSupportFragmentManager();
 241
 242         // Display the fragments.  This must be done from `onCreateOptionsMenu()` instead of `onCreate()` because `populateDomainsListView()` needs `deleteMenuItem` to be inflated.
 243         if (restartAfterRotate && domainSettingsDisplayedBeforeRotate) {  // The device was rotated and domain settings were displayed previously.
 244             if (twoPanedMode) {  // The device is in two-paned mode.
 245                 // Reset `restartAfterRotate`.
 246                 restartAfterRotate = false;
 247
 248                 // Display `DomainsListFragment`.
 249                 DomainsListFragment domainsListFragment = new DomainsListFragment();
 250                 fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 251                 fragmentManager.executePendingTransactions();
 252
 253                 // Populate the list of domains.  `domainSettingsDatabaseId` highlights the domain that was highlighted before the rotation.
 254                 populateDomainsListView(domainSettingsDatabaseIdBeforeRotate, domainsListViewPosition);
 255             } else {  // The device is in single-paned mode.
 256                 // Reset `restartAfterRotate`.
 257                 restartAfterRotate = false;
 258
 259                 // Store the current domain database ID.
 260                 currentDomainDatabaseId = domainSettingsDatabaseIdBeforeRotate;
 261
 262                 // Create an arguments bundle.
 263                 Bundle argumentsBundle = new Bundle();
 264
 265                 // Add the domain settings arguments.
 266                 argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, currentDomainDatabaseId);
 267                 argumentsBundle.putInt(DomainSettingsFragment.SCROLL_Y, domainSettingsScrollY);
 268
 269                 // Instantiate a new domain settings fragment.
 270                 DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 271
 272                 // Add the arguments bundle to the domain settings fragment.
 273                 domainSettingsFragment.setArguments(argumentsBundle);
 274
 275                 // Show the delete menu item.
 276                 deleteMenuItem.setVisible(true);
 277
 278                 // Hide the add domain floating action button.
 279                 addDomainFAB.hide();
 280
 281                 // Display the domain settings fragment.
 282                 fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 283             }
 284         } else {  // The device was not rotated or, if it was, domain settings were not displayed previously.
 285             if (goDirectlyToDatabaseId >=0) {  // Load the indicated domain settings.
 286                 // Store the current domain database ID.
 287                 currentDomainDatabaseId = goDirectlyToDatabaseId;
 288
 289                 if (twoPanedMode) {  // The device is in two-paned mode.
 290                     // Display `DomainsListFragment`.
 291                     DomainsListFragment domainsListFragment = new DomainsListFragment();
 292                     fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 293                     fragmentManager.executePendingTransactions();
 294
 295                     // Populate the list of domains.  `domainSettingsDatabaseId` highlights the domain that was highlighted before the rotation.
 296                     populateDomainsListView(goDirectlyToDatabaseId, domainsListViewPosition);
 297                 } else {  // The device is in single-paned mode.
 298                     // Create an arguments bundle.
 299                     Bundle argumentsBundle = new Bundle();
 300
 301                     // Add the domain settings to arguments bundle.
 302                     argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, goDirectlyToDatabaseId);
 303                     argumentsBundle.putInt(DomainSettingsFragment.SCROLL_Y, domainSettingsScrollY);
 304
 305                     // Instantiate a new domain settings fragment.
 306                     DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 307
 308                     // Add the arguments bundle to the domain settings fragment`.
 309                     domainSettingsFragment.setArguments(argumentsBundle);
 310
 311                     // Show the delete menu item.
 312                     deleteMenuItem.setVisible(true);
 313
 314                     // Hide the add domain floating action button.
 315                     addDomainFAB.hide();
 316
 317                     // Display the domain settings fragment.
 318                     fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 319                 }
 320             } else {  // Highlight the first domain.
 321                 // Display `DomainsListFragment`.
 322                 DomainsListFragment domainsListFragment = new DomainsListFragment();
 323                 fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 324                 fragmentManager.executePendingTransactions();
 325
 326                 // Populate the list of domains.  `-1` highlights the first domain.
 327                 populateDomainsListView(-1, domainsListViewPosition);
 328             }
 329         }
 330
 331         // Success!
 332         return true;
 333     }
 334
 335     @Override
 336     public boolean onOptionsItemSelected(MenuItem menuItem) {
 337         // Get the ID of the menu item that was selected.
 338         int menuItemId = menuItem.getItemId();
 339
 340         // Get a handle for the fragment manager.
 341         FragmentManager fragmentManager = getSupportFragmentManager();
 342
 343         // Run the command according to the selected menu item.
 344         if (menuItemId == android.R.id.home) {  // The home arrow is identified as `android.R.id.home`, not just `R.id.home`.
 345             // Check if the device is in two-paned mode.
 346             if (twoPanedMode) {  // The device is in two-paned mode.
 347                 // Save the current domain settings if the domain settings fragment is displayed.
 348                 if (findViewById(R.id.domain_settings_scrollview) != null) {
 349                     saveDomainSettings(coordinatorLayout, resources);
 350                 }
 351
 352                 // Dismiss the undo delete snackbar if it is shown.
 353                 if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
 354                     // Set the close flag.
 355                     closeActivityAfterDismissingSnackbar = true;
 356
 357                     // Dismiss the snackbar.
 358                     undoDeleteSnackbar.dismiss();
 359                 } else {
 360                     // Go home.
 361                     NavUtils.navigateUpFromSameTask(this);
 362                 }
 363             } else if (closeOnBack) {  // Go directly back to the main WebView activity because the domains activity was launched from the options menu.
 364                 // Save the current domain settings.
 365                 saveDomainSettings(coordinatorLayout, resources);
 366
 367                 // Go home.
 368                 NavUtils.navigateUpFromSameTask(this);
 369             } else if (findViewById(R.id.domain_settings_scrollview) != null) {  // The device is in single-paned mode and the domain settings fragment is displayed.
 370                 // Save the current domain settings.
 371                 saveDomainSettings(coordinatorLayout, resources);
 372
 373                 // Display the domains list fragment.
 374                 DomainsListFragment domainsListFragment = new DomainsListFragment();
 375                 fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 376                 fragmentManager.executePendingTransactions();
 377
 378                 // Populate the list of domains.  `-1` highlights the first domain if in two-paned mode.  It has no effect in single-paned mode.
 379                 populateDomainsListView(-1, domainsListViewPosition);
 380
 381                 // Show the add domain floating action button.
 382                 addDomainFAB.show();
 383
 384                 // Hide the delete menu item.
 385                 deleteMenuItem.setVisible(false);
 386             } else {  // The device is in single-paned mode and domains list fragment is displayed.
 387                 // Dismiss the undo delete `SnackBar` if it is shown.
 388                 if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
 389                     // Set the close flag.
 390                     closeActivityAfterDismissingSnackbar = true;
 391
 392                     // Dismiss the snackbar.
 393                     undoDeleteSnackbar.dismiss();
 394                 } else {
 395                     // Go home.
 396                     NavUtils.navigateUpFromSameTask(this);
 397                 }
 398             }
 399         } else if (menuItemId == R.id.delete_domain) {  // Delete.
 400             // Get a handle for the activity.
 401             Activity activity = this;
 402
 403             // Check to see if the domain settings were loaded directly for editing of this app in single-paned mode.
 404             if (closeOnBack && !twoPanedMode) {  // The activity should delete the domain settings and exit straight to the the main WebView activity.
 405                 // Delete the selected domain.
 406                 domainsDatabaseHelper.deleteDomain(currentDomainDatabaseId);
 407
 408                 // Go home.
 409                 NavUtils.navigateUpFromSameTask(activity);
 410             } else {  // A snackbar should be shown before deleting the domain settings.
 411                 // Reset close-on-back, which otherwise can cause errors if the system attempts to save settings for a domain that no longer exists.
 412                 closeOnBack = false;
 413
 414                 // Store a copy of the current domain database ID because it could change while the snackbar is displayed.
 415                 final int databaseIdToDelete = currentDomainDatabaseId;
 416
 417                 // Update the fragments and menu items.
 418                 if (twoPanedMode) {  // Two-paned mode.
 419                     // Store the deleted domain position, which is needed if undo is selected in the snackbar.
 420                     deletedDomainPosition = domainsListView.getCheckedItemPosition();
 421
 422                     // Disable the options menu items.
 423                     deleteMenuItem.setEnabled(false);
 424                     deleteMenuItem.setIcon(R.drawable.delete_disabled);
 425
 426                     // Remove the domain settings fragment.
 427                     fragmentManager.beginTransaction().remove(Objects.requireNonNull(fragmentManager.findFragmentById(R.id.domain_settings_fragment_container))).commit();
 428                 } else {  // Single-paned mode.
 429                     // Display the domains list fragment.
 430                     DomainsListFragment domainsListFragment = new DomainsListFragment();
 431                     fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 432                     fragmentManager.executePendingTransactions();
 433
 434                     // Show the add domain floating action button.
 435                     addDomainFAB.show();
 436
 437                     // Hide `deleteMenuItem`.
 438                     deleteMenuItem.setVisible(false);
 439                 }
 440
 441                 // Get a cursor that does not show the domain to be deleted.
 442                 Cursor domainsPendingDeleteCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomainExcept(databaseIdToDelete);
 443
 444                 // Setup the domains pending delete cursor adapter.
 445                 CursorAdapter domainsPendingDeleteCursorAdapter = new CursorAdapter(this, domainsPendingDeleteCursor, false) {
 446                     @Override
 447                     public View newView(Context context, Cursor cursor, ViewGroup parent) {
 448                         // Inflate the individual item layout.
 449                         return getLayoutInflater().inflate(R.layout.domain_name_linearlayout, parent, false);
 450                     }
 451
 452                     @Override
 453                     public void bindView(View view, Context context, Cursor cursor) {
 454                         // Get the domain name string.
 455                         String domainNameString = cursor.getString(cursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME));
 456
 457                         // Get a handle for the domain name text view.
 458                         TextView domainNameTextView = view.findViewById(R.id.domain_name_textview);
 459
 460                         // Display the domain name.
 461                         domainNameTextView.setText(domainNameString);
 462                     }
 463                 };
 464
 465                 // Update the handle for the current domains list view.
 466                 domainsListView = findViewById(R.id.domains_listview);
 467
 468                 // Update the list view.
 469                 domainsListView.setAdapter(domainsPendingDeleteCursorAdapter);
 470
 471                 // Display a snackbar.
 472                 undoDeleteSnackbar = Snackbar.make(domainsListView, R.string.domain_deleted, Snackbar.LENGTH_LONG)
 473                         .setAction(R.string.undo, (View v) -> {
 474                             // Do nothing because everything will be handled by `onDismissed()` below.
 475                         })
 476                         .addCallback(new Snackbar.Callback() {
 477                             @Override
 478                             public void onDismissed(Snackbar snackbar, int event) {
 479                                 // Run commands based on the event.
 480                                 if (event == Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The user pushed the `Undo` button.
 481                                     // Create an arguments bundle.
 482                                     Bundle argumentsBundle = new Bundle();
 483
 484                                     // Store the domains settings in the arguments bundle.
 485                                     argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, databaseIdToDelete);
 486                                     argumentsBundle.putInt(DomainSettingsFragment.SCROLL_Y, domainSettingsScrollY);
 487
 488                                     // Instantiate a new domain settings fragment.
 489                                     DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 490
 491                                     // Add the arguments bundle to the domain settings fragment.
 492                                     domainSettingsFragment.setArguments(argumentsBundle);
 493
 494                                     // Display the correct fragments.
 495                                     if (twoPanedMode) {  // The device in in two-paned mode.
 496                                         // Get a cursor with the current contents of the domains database.
 497                                         Cursor undoDeleteDomainsCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
 498
 499                                         // Setup the domains cursor adapter.
 500                                         CursorAdapter undoDeleteDomainsCursorAdapter = new CursorAdapter(getApplicationContext(), undoDeleteDomainsCursor, false) {
 501                                             @Override
 502                                             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 503                                                 // Inflate the individual item layout.
 504                                                 return getLayoutInflater().inflate(R.layout.domain_name_linearlayout, parent, false);
 505                                             }
 506
 507                                             @Override
 508                                             public void bindView(View view, Context context, Cursor cursor) {
 509                                                 /// Get the domain name string.
 510                                                 String domainNameString = cursor.getString(cursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME));
 511
 512                                                 // Get a handle for the domain name text view.
 513                                                 TextView domainNameTextView = view.findViewById(R.id.domain_name_textview);
 514
 515                                                 // Display the domain name.
 516                                                 domainNameTextView.setText(domainNameString);
 517                                             }
 518                                         };
 519
 520                                         // Update the domains list view.
 521                                         domainsListView.setAdapter(undoDeleteDomainsCursorAdapter);
 522
 523                                         // Select the previously deleted domain in the list view.
 524                                         domainsListView.setItemChecked(deletedDomainPosition, true);
 525
 526                                         // Display the domain settings fragment.
 527                                         fragmentManager.beginTransaction().replace(R.id.domain_settings_fragment_container, domainSettingsFragment).commit();
 528
 529                                         // Enable the options delete menu item.
 530                                         deleteMenuItem.setEnabled(true);
 531
 532                                         // Get the current theme status.
 533                                         int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
 534
 535                                         // Set the delete menu item icon according to the theme.
 536                                         if (currentThemeStatus == Configuration.UI_MODE_NIGHT_YES) {
 537                                             deleteMenuItem.setIcon(R.drawable.delete_night);
 538                                         } else {
 539                                             deleteMenuItem.setIcon(R.drawable.delete_day);
 540                                         }
 541                                     } else {  // The device in in one-paned mode.
 542                                         // Display the domain settings fragment.
 543                                         fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 544
 545                                         // Hide the add domain floating action button.
 546                                         addDomainFAB.hide();
 547
 548                                         // Show and enable the delete menu item.
 549                                         deleteMenuItem.setVisible(true);
 550
 551                                         // Display the domain settings fragment.
 552                                         fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 553                                     }
 554                                 } else {  // The snackbar was dismissed without the undo button being pushed.
 555                                     // Delete the selected domain.
 556                                     domainsDatabaseHelper.deleteDomain(databaseIdToDelete);
 557
 558                                     // Enable the delete menu item if the system was waiting for a snackbar to be dismissed.
 559                                     if (dismissingSnackbar) {
 560                                         // Create a `Runnable` to enable the delete menu item.
 561                                         Runnable enableDeleteMenuItemRunnable = () -> {
 562                                             // Enable the delete menu item according to the display mode.
 563                                             if (twoPanedMode) {  // Two-paned mode.
 564                                                 // Enable the delete menu item.
 565                                                 deleteMenuItem.setEnabled(true);
 566
 567                                                 // Get the current theme status.
 568                                                 int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
 569
 570                                                 // Set the delete menu item icon according to the theme.
 571                                                 if (currentThemeStatus == Configuration.UI_MODE_NIGHT_YES) {
 572                                                     deleteMenuItem.setIcon(R.drawable.delete_night);
 573                                                 } else {
 574                                                     deleteMenuItem.setIcon(R.drawable.delete_day);
 575                                                 }
 576                                             } else {  // Single-paned mode.
 577                                                 // Show the delete menu item.
 578                                                 deleteMenuItem.setVisible(true);
 579                                             }
 580
 581                                             // Reset the dismissing snackbar tracker.
 582                                             dismissingSnackbar = false;
 583                                         };
 584
 585                                         // Enable the delete menu icon after 100 milliseconds to make sure that the previous domain has been deleted from the database.
 586                                         Handler handler = new Handler();
 587                                         handler.postDelayed(enableDeleteMenuItemRunnable, 100);
 588                                     }
 589
 590                                     // Close the activity if back was pressed.
 591                                     if (closeActivityAfterDismissingSnackbar) {
 592                                         // Go home.
 593                                         NavUtils.navigateUpFromSameTask(activity);
 594                                     }
 595                                 }
 596                             }
 597                         });
 598
 599                 // Show the Snackbar.
 600                 undoDeleteSnackbar.show();
 601             }
 602         }
 603
 604         // Consume the event.
 605         return true;
 606     }
 607
 608     @Override
 609     protected void onSaveInstanceState(@NonNull Bundle savedInstanceState) {
 610         // Run the default commands.
 611         super.onSaveInstanceState(savedInstanceState);
 612
 613         // Get a handle for the domain settings scrollview.
 614         ScrollView domainSettingsScrollView = findViewById(R.id.domain_settings_scrollview);
 615
 616         // Check to see if the domain settings scrollview exists.
 617         if (domainSettingsScrollView == null) {  // The domain settings are not displayed.
 618             // Store the domain settings status in the bundle.
 619             savedInstanceState.putBoolean(DOMAIN_SETTINGS_DISPLAYED, false);
 620             savedInstanceState.putInt(DOMAIN_SETTINGS_DATABASE_ID, -1);
 621             savedInstanceState.putInt(DOMAIN_SETTINGS_SCROLL_Y, 0);
 622         } else {  // The domain settings are displayed.
 623             // Save any changes that have been made to the domain settings.
 624             saveDomainSettings(coordinatorLayout, resources);
 625
 626             // Get the domain settings scroll Y.
 627             int domainSettingsScrollY = domainSettingsScrollView.getScrollY();
 628
 629             // Store the domain settings status in the bundle.
 630             savedInstanceState.putBoolean(DOMAIN_SETTINGS_DISPLAYED, true);
 631             savedInstanceState.putInt(DOMAIN_SETTINGS_DATABASE_ID, DomainSettingsFragment.databaseId);
 632             savedInstanceState.putInt(DOMAIN_SETTINGS_SCROLL_Y, domainSettingsScrollY);
 633         }
 634
 635         // Check to see if the domains listview exists.
 636         if (domainsListView != null) {
 637             // Get the domains listview position.
 638             int domainsListViewPosition = domainsListView.getFirstVisiblePosition();
 639
 640             // Store the listview position in the bundle.
 641             savedInstanceState.putInt(LISTVIEW_POSITION, domainsListViewPosition);
 642         }
 643     }
 644
 645     // Control what the navigation bar back button does.
 646     @Override
 647     public void onBackPressed() {
 648         // Get a handle for the fragment manager.
 649         FragmentManager fragmentManager = getSupportFragmentManager();
 650
 651         if (twoPanedMode) {  // The device is in two-paned mode.
 652             // Save the current domain settings if the domain settings fragment is displayed.
 653             if (findViewById(R.id.domain_settings_scrollview) != null) {
 654                 saveDomainSettings(coordinatorLayout, resources);
 655             }
 656
 657             // Dismiss the undo delete SnackBar if it is shown.
 658             if ((undoDeleteSnackbar != null) && undoDeleteSnackbar.isShown()) {
 659                 // Set the close flag.
 660                 closeActivityAfterDismissingSnackbar = true;
 661
 662                 // Dismiss the snackbar.
 663                 undoDeleteSnackbar.dismiss();
 664             } else {
 665                 // Pass `onBackPressed()` to the system.
 666                 super.onBackPressed();
 667             }
 668         } else if (closeOnBack) {  // Go directly back to the main WebView activity because the domains activity was launched from the options menu.
 669             // Save the current domain settings.
 670             saveDomainSettings(coordinatorLayout, resources);
 671
 672             // Pass `onBackPressed()` to the system.
 673             super.onBackPressed();
 674         } else if (findViewById(R.id.domain_settings_scrollview) != null) {  // The device is in single-paned mode and domain settings fragment is displayed.
 675             // Save the current domain settings.
 676             saveDomainSettings(coordinatorLayout, resources);
 677
 678             // Display the domains list fragment.
 679             DomainsListFragment domainsListFragment = new DomainsListFragment();
 680             fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 681             fragmentManager.executePendingTransactions();
 682
 683             // Populate the list of domains.  `-1` highlights the first domain if in two-paned mode.  It has no effect in single-paned mode.
 684             populateDomainsListView(-1, domainsListViewPosition);
 685
 686             // Show the add domain floating action button.
 687             addDomainFAB.show();
 688
 689             // Hide the delete menu item.
 690             deleteMenuItem.setVisible(false);
 691         } else {  // The device is in single-paned mode and the domain list fragment is displayed.
 692             // Dismiss the undo delete SnackBar if it is shown.
 693             if ((undoDeleteSnackbar != null) && undoDeleteSnackbar.isShown()) {
 694                 // Set the close flag.
 695                 closeActivityAfterDismissingSnackbar = true;
 696
 697                 // Dismiss the snackbar.
 698                 undoDeleteSnackbar.dismiss();
 699             } else {
 700                 // Pass `onBackPressed()` to the system.
 701                 super.onBackPressed();
 702             }
 703         }
 704     }
 705
 706     @Override
 707     public void onAddDomain(@NonNull DialogFragment dialogFragment) {
 708         // Dismiss the undo delete snackbar if it is currently displayed.
 709         if ((undoDeleteSnackbar != null) && undoDeleteSnackbar.isShown()) {
 710             undoDeleteSnackbar.dismiss();
 711         }
 712
 713         // Remove the incorrect lint warning below that the dialog might be null.
 714         assert dialogFragment.getDialog() != null;
 715
 716         // Get a handle for the domain name edit text.
 717         EditText domainNameEditText = dialogFragment.getDialog().findViewById(R.id.domain_name_edittext);
 718
 719         // Get the domain name string.
 720         String domainNameString = domainNameEditText.getText().toString();
 721
 722         // Create the domain and store the database ID in `currentDomainDatabaseId`.
 723         currentDomainDatabaseId = domainsDatabaseHelper.addDomain(domainNameString);
 724
 725         // Display the newly created domain.
 726         if (twoPanedMode) {  // The device in in two-paned mode.
 727             populateDomainsListView(currentDomainDatabaseId, 0);
 728         } else {  // The device is in single-paned mode.
 729             // Hide the add domain floating action button.
 730             addDomainFAB.hide();
 731
 732             // Show and enable the delete menu item.
 733             DomainsActivity.deleteMenuItem.setVisible(true);
 734
 735             // Create an arguments bundle.
 736             Bundle argumentsBundle = new Bundle();
 737
 738             // Add the domain settings to the arguments bundle.  The scroll Y should always be `0` on a new domain.
 739             argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, currentDomainDatabaseId);
 740             argumentsBundle.putInt(DomainSettingsFragment.SCROLL_Y, 0);
 741
 742             // Instantiate a new domain settings fragment.
 743             DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 744
 745             // Add the arguments bundle to the domain setting fragment.
 746             domainSettingsFragment.setArguments(argumentsBundle);
 747
 748             // Display the domain settings fragment.
 749             getSupportFragmentManager().beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 750         }
 751     }
 752
 753     public void saveDomainSettings(View view, Resources resources) {
 754         // Get handles for the domain settings.
 755         EditText domainNameEditText = view.findViewById(R.id.domain_settings_name_edittext);
 756         SwitchCompat javaScriptSwitch = view.findViewById(R.id.javascript_switch);
 757         SwitchCompat cookiesSwitch = view.findViewById(R.id.cookies_switch);
 758         SwitchCompat domStorageSwitch = view.findViewById(R.id.dom_storage_switch);
 759         SwitchCompat formDataSwitch = view.findViewById(R.id.form_data_switch);  // Form data can be removed once the minimum API >= 26.
 760         SwitchCompat easyListSwitch = view.findViewById(R.id.easylist_switch);
 761         SwitchCompat easyPrivacySwitch = view.findViewById(R.id.easyprivacy_switch);
 762         SwitchCompat fanboysAnnoyanceSwitch = view.findViewById(R.id.fanboys_annoyance_list_switch);
 763         SwitchCompat fanboysSocialBlockingSwitch = view.findViewById(R.id.fanboys_social_blocking_list_switch);
 764         SwitchCompat ultraListSwitch = view.findViewById(R.id.ultralist_switch);
 765         SwitchCompat ultraPrivacySwitch = view.findViewById(R.id.ultraprivacy_switch);
 766         SwitchCompat blockAllThirdPartyRequestsSwitch = view.findViewById(R.id.block_all_third_party_requests_switch);
 767         Spinner userAgentSpinner = view.findViewById(R.id.user_agent_spinner);
 768         EditText customUserAgentEditText = view.findViewById(R.id.custom_user_agent_edittext);
 769         Spinner fontSizeSpinner = view.findViewById(R.id.font_size_spinner);
 770         EditText customFontSizeEditText = view.findViewById(R.id.custom_font_size_edittext);
 771         Spinner swipeToRefreshSpinner = view.findViewById(R.id.swipe_to_refresh_spinner);
 772         Spinner webViewThemeSpinner = view.findViewById(R.id.webview_theme_spinner);
 773         Spinner wideViewportSpinner = view.findViewById(R.id.wide_viewport_spinner);
 774         Spinner displayWebpageImagesSpinner = view.findViewById(R.id.display_webpage_images_spinner);
 775         SwitchCompat pinnedSslCertificateSwitch = view.findViewById(R.id.pinned_ssl_certificate_switch);
 776         RadioButton currentWebsiteCertificateRadioButton = view.findViewById(R.id.current_website_certificate_radiobutton);
 777         SwitchCompat pinnedIpAddressesSwitch = view.findViewById(R.id.pinned_ip_addresses_switch);
 778         RadioButton currentIpAddressesRadioButton = view.findViewById(R.id.current_ip_addresses_radiobutton);
 779
 780         // Extract the data for the domain settings.
 781         String domainNameString = domainNameEditText.getText().toString();
 782         boolean javaScript = javaScriptSwitch.isChecked();
 783         boolean cookies = cookiesSwitch.isChecked();
 784         boolean domStorage  = domStorageSwitch.isChecked();
 785         boolean formData = formDataSwitch.isChecked();  // Form data can be removed once the minimum API >= 26.
 786         boolean easyList = easyListSwitch.isChecked();
 787         boolean easyPrivacy = easyPrivacySwitch.isChecked();
 788         boolean fanboysAnnoyance = fanboysAnnoyanceSwitch.isChecked();
 789         boolean fanboysSocialBlocking = fanboysSocialBlockingSwitch.isChecked();
 790         boolean ultraList = ultraListSwitch.isChecked();
 791         boolean ultraPrivacy = ultraPrivacySwitch.isChecked();
 792         boolean blockAllThirdPartyRequests = blockAllThirdPartyRequestsSwitch.isChecked();
 793         int userAgentSwitchPosition = userAgentSpinner.getSelectedItemPosition();
 794         int fontSizeSwitchPosition = fontSizeSpinner.getSelectedItemPosition();
 795         int swipeToRefreshInt = swipeToRefreshSpinner.getSelectedItemPosition();
 796         int webViewThemeInt = webViewThemeSpinner.getSelectedItemPosition();
 797         int wideViewportInt = wideViewportSpinner.getSelectedItemPosition();
 798         int displayWebpageImagesInt = displayWebpageImagesSpinner.getSelectedItemPosition();
 799         boolean pinnedSslCertificate = pinnedSslCertificateSwitch.isChecked();
 800         boolean pinnedIpAddress = pinnedIpAddressesSwitch.isChecked();
 801
 802         // Initialize the user agent name string.
 803         String userAgentName;
 804
 805         // Set the user agent name.
 806         switch (userAgentSwitchPosition) {
 807             case MainWebViewActivity.DOMAINS_SYSTEM_DEFAULT_USER_AGENT:
 808                 // Set the user agent name to be `System default user agent`.
 809                 userAgentName = resources.getString(R.string.system_default_user_agent);
 810                 break;
 811
 812             case MainWebViewActivity.DOMAINS_CUSTOM_USER_AGENT:
 813                 // Set the user agent name to be the custom user agent.
 814                 userAgentName = customUserAgentEditText.getText().toString();
 815                 break;
 816
 817             default:
 818                 // Get the array of user agent names.
 819                 String[] userAgentNameArray = resources.getStringArray(R.array.user_agent_names);
 820
 821                 // Set the user agent name from the array.  The domain spinner has one more entry than the name array, so the position must be decremented.
 822                 userAgentName = userAgentNameArray[userAgentSwitchPosition - 1];
 823         }
 824
 825         // Initialize the font size integer.  `0` indicates the system default font size.
 826         int fontSizeInt = 0;
 827
 828         // Use a custom font size if it is selected.
 829         if (fontSizeSwitchPosition == 1) {  // A custom font size is specified.
 830             // Get the custom font size from the edit text.
 831             fontSizeInt = Integer.parseInt(customFontSizeEditText.getText().toString());
 832         }
 833
 834         // Save the domain settings.
 835         domainsDatabaseHelper.updateDomain(DomainsActivity.currentDomainDatabaseId, domainNameString, javaScript, cookies, domStorage, formData, easyList, easyPrivacy,
 836                 fanboysAnnoyance, fanboysSocialBlocking, ultraList, ultraPrivacy, blockAllThirdPartyRequests, userAgentName, fontSizeInt, swipeToRefreshInt, webViewThemeInt, wideViewportInt,
 837                 displayWebpageImagesInt, pinnedSslCertificate, pinnedIpAddress);
 838
 839         // Update the pinned SSL certificate if a new one is checked.
 840         if (currentWebsiteCertificateRadioButton.isChecked()) {
 841             // Update the database.
 842             domainsDatabaseHelper.updatePinnedSslCertificate(currentDomainDatabaseId, sslIssuedToCName, sslIssuedToOName, sslIssuedToUName, sslIssuedByCName, sslIssuedByOName, sslIssuedByUName,
 843                     sslStartDateLong, sslEndDateLong);
 844         }
 845
 846         // Update the pinned IP addresses if new ones are checked.
 847         if (currentIpAddressesRadioButton.isChecked()) {
 848             // Update the database.
 849             domainsDatabaseHelper.updatePinnedIpAddresses(currentDomainDatabaseId, currentIpAddresses);
 850         }
 851     }
 852
 853     private void populateDomainsListView(final int highlightedDomainDatabaseId, int domainsListViewPosition) {
 854         // get a handle for the current `domains_listview`.
 855         domainsListView = findViewById(R.id.domains_listview);
 856
 857         // Get a `Cursor` with the current contents of the domains database.
 858         Cursor domainsCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
 859
 860         // Setup `domainsCursorAdapter` with `this` context.  `false` disables `autoRequery`.
 861         CursorAdapter domainsCursorAdapter = new CursorAdapter(getApplicationContext(), domainsCursor, false) {
 862             @Override
 863             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 864                 // Inflate the individual item layout.  `false` does not attach it to the root.
 865                 return getLayoutInflater().inflate(R.layout.domain_name_linearlayout, parent, false);
 866             }
 867
 868             @Override
 869             public void bindView(View view, Context context, Cursor cursor) {
 870                 // Set the domain name.
 871                 String domainNameString = cursor.getString(cursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME));
 872                 TextView domainNameTextView = view.findViewById(R.id.domain_name_textview);
 873                 domainNameTextView.setText(domainNameString);
 874             }
 875         };
 876
 877         // Update the list view.
 878         domainsListView.setAdapter(domainsCursorAdapter);
 879
 880         // Restore the scroll position.
 881         domainsListView.setSelection(domainsListViewPosition);
 882
 883         // Display the domain settings in the second pane if operating in two pane mode and the database contains at least one domain.
 884         if (DomainsActivity.twoPanedMode && (domainsCursor.getCount() > 0)) {  // Two-paned mode is enabled and there is at least one domain.
 885             // Initialize `highlightedDomainPosition`.
 886             int highlightedDomainPosition = 0;
 887
 888             // Get the cursor position for the highlighted domain.
 889             for (int i = 0; i < domainsCursor.getCount(); i++) {
 890                 // Move to position `i` in the cursor.
 891                 domainsCursor.moveToPosition(i);
 892
 893                 // Get the database ID for this position.
 894                 int currentDatabaseId = domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper._ID));
 895
 896                 // Set `highlightedDomainPosition` if the database ID for this matches `highlightedDomainDatabaseId`.
 897                 if (highlightedDomainDatabaseId == currentDatabaseId) {
 898                     highlightedDomainPosition = i;
 899                 }
 900             }
 901
 902             // Select the highlighted domain.
 903             domainsListView.setItemChecked(highlightedDomainPosition, true);
 904
 905             // Get the database ID for the highlighted domain.
 906             domainsCursor.moveToPosition(highlightedDomainPosition);
 907             currentDomainDatabaseId = domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper._ID));
 908
 909             // Create an arguments bundle.
 910             Bundle argumentsBundle = new Bundle();
 911
 912             // Store the domain settings in the arguments bundle.
 913             argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, currentDomainDatabaseId);
 914             argumentsBundle.putInt(DomainSettingsFragment.SCROLL_Y, domainSettingsScrollY);
 915
 916             // Instantiate a new domain settings fragment.
 917             DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 918
 919             // Add the arguments bundle to the domain settings fragment.
 920             domainSettingsFragment.setArguments(argumentsBundle);
 921
 922             // Display the domain settings fragment.
 923             getSupportFragmentManager().beginTransaction().replace(R.id.domain_settings_fragment_container, domainSettingsFragment).commit();
 924
 925             // Enable the delete options menu items.
 926             deleteMenuItem.setEnabled(true);
 927
 928             // Get the current theme status.
 929             int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
 930
 931             // Set the delete icon according to the theme.
 932             if (currentThemeStatus == Configuration.UI_MODE_NIGHT_YES) {
 933                 deleteMenuItem.setIcon(R.drawable.delete_night);
 934             } else {
 935                 deleteMenuItem.setIcon(R.drawable.delete_day);
 936             }
 937         } else if (twoPanedMode) {  // Two-paned mode is enabled but there are no domains.
 938             // Disable the options `MenuItems`.
 939             deleteMenuItem.setEnabled(false);
 940             deleteMenuItem.setIcon(R.drawable.delete_disabled);
 941         }
 942     }
 943
 944     @Override
 945     public void dismissSnackbar() {
 946         // Dismiss the undo delete snackbar if it is shown.
 947         if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
 948             // Dismiss the snackbar.
 949             undoDeleteSnackbar.dismiss();
 950         }
 951     }
 952
 953     @Override
 954     public void onDestroy() {
 955         // Close the domains database helper.
 956         domainsDatabaseHelper.close();
 957
 958         // Run the default commands.
 959         super.onDestroy();
 960     }
 961 }