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