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

   1 /*
   2  * Copyright © 2017-2020 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.Resources;
  27 import android.database.Cursor;
  28 import android.os.Bundle;
  29 import android.os.Handler;
  30 import android.preference.PreferenceManager;
  31 import android.view.Menu;
  32 import android.view.MenuItem;
  33 import android.view.View;
  34 import android.view.ViewGroup;
  35 import android.view.WindowManager;
  36 import android.widget.CursorAdapter;
  37 import android.widget.EditText;
  38 import android.widget.ListView;
  39 import android.widget.RadioButton;
  40 import android.widget.Spinner;
  41 import android.widget.Switch;
  42 import android.widget.TextView;
  43
  44 import androidx.annotation.NonNull;
  45 import androidx.appcompat.app.ActionBar;
  46 import androidx.appcompat.app.AppCompatActivity;
  47 import androidx.appcompat.widget.Toolbar;  // The AndroidX toolbar must be used until the minimum API is >= 21.
  48 import androidx.core.app.NavUtils;
  49 import androidx.fragment.app.DialogFragment;
  50 import androidx.fragment.app.FragmentManager;  // The AndroidX dialog fragment must be used or an error is produced on API <=22.
  51
  52 import com.google.android.material.floatingactionbutton.FloatingActionButton;
  53 import com.google.android.material.snackbar.Snackbar;
  54
  55 import com.stoutner.privacybrowser.R;
  56 import com.stoutner.privacybrowser.dialogs.AddDomainDialog;
  57 import com.stoutner.privacybrowser.fragments.DomainSettingsFragment;
  58 import com.stoutner.privacybrowser.fragments.DomainsListFragment;
  59 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
  60
  61 import java.util.Objects;
  62
  63 public class DomainsActivity extends AppCompatActivity implements AddDomainDialog.AddDomainListener, DomainsListFragment.DismissSnackbarInterface {
  64     // `twoPanedMode` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onCreate()`, `onCreateOptionsMenu()`, and `populateDomainsListView()`.
  65     public static boolean twoPanedMode;
  66
  67     // `databaseId` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onCreateOptionsMenu()`, `saveDomainSettings()` and `populateDomainsListView()`.
  68     public static int currentDomainDatabaseId;
  69
  70     // `deleteMenuItem` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onCreateOptionsMenu()`, `onOptionsItemSelected()`, and `onBackPressed()`.
  71     public static MenuItem deleteMenuItem;
  72
  73     // `dismissingSnackbar` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onOptionsItemSelected()`.
  74     public static boolean dismissingSnackbar;
  75
  76     // The SSL certificate and IP address information are accessed from `DomainSettingsFragment` and `saveDomainSettings()`.
  77     public static String sslIssuedToCName;
  78     public static String sslIssuedToOName;
  79     public static String sslIssuedToUName;
  80     public static String sslIssuedByCName;
  81     public static String sslIssuedByOName;
  82     public static String sslIssuedByUName;
  83     public static long sslStartDateLong;
  84     public static long sslEndDateLong;
  85     public static String currentIpAddresses;
  86
  87
  88     // `closeActivityAfterDismissingSnackbar` is used in `onOptionsItemSelected()`, and `onBackPressed()`.
  89     private boolean closeActivityAfterDismissingSnackbar;
  90
  91     // The undelete snackbar is used in `onOptionsItemSelected()` and `onBackPressed()`.
  92     private Snackbar undoDeleteSnackbar;
  93
  94     // `domainsDatabaseHelper` is used in `onCreate()`, `saveDomainSettings()`, and `onDestroy()`.
  95     private static DomainsDatabaseHelper domainsDatabaseHelper;
  96
  97     // `domainsListView` is used in `onCreate()` and `populateDomainsList()`.
  98     private ListView domainsListView;
  99
 100     // `addDomainFAB` is used in `onCreate()`, `onCreateOptionsMenu()`, `onOptionsItemSelected()`, and `onBackPressed()`.
 101     private FloatingActionButton addDomainFAB;
 102
 103     // `deletedDomainPosition` is used in an inner and outer class in `onOptionsItemSelected()`.
 104     private int deletedDomainPosition;
 105
 106     // `restartAfterRotate` is used in `onCreate()` and `onCreateOptionsMenu()`.
 107     private boolean restartAfterRotate;
 108
 109     // `domainSettingsDisplayedBeforeRotate` is used in `onCreate()` and `onCreateOptionsMenu()`.
 110     private boolean domainSettingsDisplayedBeforeRotate;
 111
 112     // `domainSettingsDatabaseIdBeforeRotate` is used in `onCreate()` and `onCreateOptionsMenu()`.
 113     private int domainSettingsDatabaseIdBeforeRotate;
 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 theme and screenshot preferences.
 133         boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 134         boolean allowScreenshots = sharedPreferences.getBoolean("allow_screenshots", false);
 135
 136         // Disable screenshots if not allowed.
 137         if (!allowScreenshots) {
 138             getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
 139         }
 140
 141         // Set the activity theme.
 142         if (darkTheme) {
 143             setTheme(R.style.PrivacyBrowserDark_SecondaryActivity);
 144         } else {
 145             setTheme(R.style.PrivacyBrowserLight_SecondaryActivity);
 146         }
 147
 148         // Run the default commands.
 149         super.onCreate(savedInstanceState);
 150
 151         // Extract the values from `savedInstanceState` if it is not `null`.
 152         if (savedInstanceState != null) {
 153             restartAfterRotate = true;
 154             domainSettingsDisplayedBeforeRotate = savedInstanceState.getBoolean("domain_settings_displayed");
 155             domainSettingsDatabaseIdBeforeRotate = savedInstanceState.getInt("domain_settings_database_id");
 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);
 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                 // Add `currentDomainDatabaseId` to `argumentsBundle`.
 258                 Bundle argumentsBundle = new Bundle();
 259                 argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, currentDomainDatabaseId);
 260
 261                 // Add `argumentsBundle` to `domainSettingsFragment`.
 262                 DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 263                 domainSettingsFragment.setArguments(argumentsBundle);
 264
 265                 // Show `deleteMenuItem`.
 266                 deleteMenuItem.setVisible(true);
 267
 268                 // Hide the add domain floating action button.
 269                 addDomainFAB.hide();
 270
 271                 // Display `domainSettingsFragment`.
 272                 fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 273             }
 274         } else {  // The device was not rotated or, if it was, domain settings were not displayed previously.
 275             if (goDirectlyToDatabaseId >=0) {  // Load the indicated domain settings.
 276                 // Store the current domain database ID.
 277                 currentDomainDatabaseId = goDirectlyToDatabaseId;
 278
 279                 if (twoPanedMode) {  // The device is in two-paned mode.
 280                     // Display `DomainsListFragment`.
 281                     DomainsListFragment domainsListFragment = new DomainsListFragment();
 282                     fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 283                     fragmentManager.executePendingTransactions();
 284
 285                     // Populate the list of domains.  `domainSettingsDatabaseId` highlights the domain that was highlighted before the rotation.
 286                     populateDomainsListView(goDirectlyToDatabaseId);
 287                 } else {  // The device is in single-paned mode.
 288                     // Add the domain ID to be loaded to `argumentsBundle`.
 289                     Bundle argumentsBundle = new Bundle();
 290                     argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, goDirectlyToDatabaseId);
 291
 292                     // Add `argumentsBundle` to `domainSettingsFragment`.
 293                     DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 294                     domainSettingsFragment.setArguments(argumentsBundle);
 295
 296                     // Show `deleteMenuItem`.
 297                     deleteMenuItem.setVisible(true);
 298
 299                     // Hide the add domain floating action button.
 300                     addDomainFAB.hide();
 301
 302                     // Display `domainSettingsFragment`.
 303                     fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 304                 }
 305             } else {  // Highlight the first domain.
 306                 // Display `DomainsListFragment`.
 307                 DomainsListFragment domainsListFragment = new DomainsListFragment();
 308                 fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 309                 fragmentManager.executePendingTransactions();
 310
 311                 // Populate the list of domains.  `-1` highlights the first domain.
 312                 populateDomainsListView(-1);
 313             }
 314         }
 315
 316         // Success!
 317         return true;
 318     }
 319
 320     @Override
 321     public boolean onOptionsItemSelected(MenuItem menuItem) {
 322         // Get the ID of the menu item that was selected.
 323         int menuItemID = menuItem.getItemId();
 324
 325         // Get a handle for the fragment manager.
 326         FragmentManager fragmentManager = getSupportFragmentManager();
 327
 328         switch (menuItemID) {
 329             case android.R.id.home:  // The home arrow is identified as `android.R.id.home`, not just `R.id.home`.
 330                 if (twoPanedMode) {  // The device is in two-paned mode.
 331                     // Save the current domain settings if the domain settings fragment is displayed.
 332                     if (findViewById(R.id.domain_settings_scrollview) != null) {
 333                         saveDomainSettings(coordinatorLayout, resources);
 334                     }
 335
 336                     // Dismiss the undo delete `SnackBar` if it is shown.
 337                     if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
 338                         // Set the close flag.
 339                         closeActivityAfterDismissingSnackbar = true;
 340
 341                         // Dismiss the snackbar.
 342                         undoDeleteSnackbar.dismiss();
 343                     } else {
 344                         // Go home.
 345                         NavUtils.navigateUpFromSameTask(this);
 346                     }
 347                 } else if (closeOnBack) {  // Go directly back to the main WebView activity because the domains activity was launched from the options menu.
 348                     // Save the current domain settings.
 349                     saveDomainSettings(coordinatorLayout, resources);
 350
 351                     // Go home.
 352                     NavUtils.navigateUpFromSameTask(this);
 353                 } else if (findViewById(R.id.domain_settings_scrollview) != null) {  // The device is in single-paned mode and the domain settings fragment is displayed.
 354                     // Save the current domain settings.
 355                     saveDomainSettings(coordinatorLayout, resources);
 356
 357                     // Display the domains list fragment.
 358                     DomainsListFragment domainsListFragment = new DomainsListFragment();
 359                     fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 360                     fragmentManager.executePendingTransactions();
 361
 362                     // Populate the list of domains.  `-1` highlights the first domain if in two-paned mode.  It has no effect in single-paned mode.
 363                     populateDomainsListView(-1);
 364
 365                     // Show the add domain floating action button.
 366                     addDomainFAB.show();
 367
 368                     // Hide the delete menu item.
 369                     deleteMenuItem.setVisible(false);
 370                 } else {  // The device is in single-paned mode and `DomainsListFragment` is displayed.
 371                     // Dismiss the undo delete `SnackBar` if it is shown.
 372                     if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
 373                         // Set the close flag.
 374                         closeActivityAfterDismissingSnackbar = true;
 375
 376                         // Dismiss the snackbar.
 377                         undoDeleteSnackbar.dismiss();
 378                     } else {
 379                         // Go home.
 380                         NavUtils.navigateUpFromSameTask(this);
 381                     }
 382                 }
 383                 break;
 384
 385             case R.id.delete_domain:
 386                 // Reset close-on-back, which otherwise can cause errors if the system attempts to save settings for a domain that no longer exists.
 387                 closeOnBack = false;
 388
 389                 // Store a copy of `currentDomainDatabaseId` because it could change while the `Snackbar` is displayed.
 390                 final int databaseIdToDelete = currentDomainDatabaseId;
 391
 392                 // Update the fragments and menu items.
 393                 if (twoPanedMode) {  // Two-paned mode.
 394                     // Store the deleted domain position, which is needed if `Undo` is selected in the `Snackbar`.
 395                     deletedDomainPosition = domainsListView.getCheckedItemPosition();
 396
 397                     // Disable the options `MenuItems`.
 398                     deleteMenuItem.setEnabled(false);
 399                     deleteMenuItem.setIcon(R.drawable.delete_blue);
 400
 401                     // Remove the domain settings fragment.
 402                     fragmentManager.beginTransaction().remove(Objects.requireNonNull(fragmentManager.findFragmentById(R.id.domain_settings_fragment_container))).commit();
 403                 } else {  // Single-paned mode.
 404                     // Display `DomainsListFragment`.
 405                     DomainsListFragment domainsListFragment = new DomainsListFragment();
 406                     fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 407                     fragmentManager.executePendingTransactions();
 408
 409                     // Show the add domain floating action button.
 410                     addDomainFAB.show();
 411
 412                     // Hide `deleteMenuItem`.
 413                     deleteMenuItem.setVisible(false);
 414                 }
 415
 416                 // Get a `Cursor` that does not show the domain to be deleted.
 417                 Cursor domainsPendingDeleteCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomainExcept(databaseIdToDelete);
 418
 419                 // Setup `domainsPendingDeleteCursorAdapter` with `this` context.  `false` disables `autoRequery`.
 420                 CursorAdapter domainsPendingDeleteCursorAdapter = new CursorAdapter(this, domainsPendingDeleteCursor, false) {
 421                     @Override
 422                     public View newView(Context context, Cursor cursor, ViewGroup parent) {
 423                         // Inflate the individual item layout.  `false` does not attach it to the root.
 424                         return getLayoutInflater().inflate(R.layout.domain_name_linearlayout, parent, false);
 425                     }
 426
 427                     @Override
 428                     public void bindView(View view, Context context, Cursor cursor) {
 429                         // Set the domain name.
 430                         String domainNameString = cursor.getString(cursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME));
 431                         TextView domainNameTextView = view.findViewById(R.id.domain_name_textview);
 432                         domainNameTextView.setText(domainNameString);
 433                     }
 434                 };
 435
 436                 // Update the handle for the current `domains_listview`.
 437                 domainsListView = findViewById(R.id.domains_listview);
 438
 439                 // Update the `ListView`.
 440                 domainsListView.setAdapter(domainsPendingDeleteCursorAdapter);
 441
 442                 // Get a handle for the activity.
 443                 Activity activity = this;
 444
 445                 // Display a `Snackbar`.
 446                 undoDeleteSnackbar = Snackbar.make(domainsListView, R.string.domain_deleted, Snackbar.LENGTH_LONG)
 447                         .setAction(R.string.undo, (View v) -> {
 448                             // Do nothing because everything will be handled by `onDismissed()` below.
 449                         })
 450                         .addCallback(new Snackbar.Callback() {
 451                             @Override
 452                             public void onDismissed(Snackbar snackbar, int event) {
 453                                 // Run commands based on the event.
 454                                 if (event == Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The user pushed the `Undo` button.
 455                                     // Store the database ID in arguments bundle.
 456                                     Bundle argumentsBundle = new Bundle();
 457                                     argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, databaseIdToDelete);
 458
 459                                     // Add the arguments bundle to the domain settings fragment.
 460                                     DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 461                                     domainSettingsFragment.setArguments(argumentsBundle);
 462
 463                                     // Display the correct fragments.
 464                                     if (twoPanedMode) {  // The device in in two-paned mode.
 465                                         // Get a `Cursor` with the current contents of the domains database.
 466                                         Cursor undoDeleteDomainsCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
 467
 468                                         // Setup `domainsCursorAdapter` with `this` context.  `false` disables `autoRequery`.
 469                                         CursorAdapter undoDeleteDomainsCursorAdapter = new CursorAdapter(getApplicationContext(), undoDeleteDomainsCursor, false) {
 470                                             @Override
 471                                             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 472                                                 // Inflate the individual item layout.  `false` does not attach it to the root.
 473                                                 return getLayoutInflater().inflate(R.layout.domain_name_linearlayout, parent, false);
 474                                             }
 475
 476                                             @Override
 477                                             public void bindView(View view, Context context, Cursor cursor) {
 478                                                 // Set the domain name.
 479                                                 String domainNameString = cursor.getString(cursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME));
 480                                                 TextView domainNameTextView = view.findViewById(R.id.domain_name_textview);
 481                                                 domainNameTextView.setText(domainNameString);
 482                                             }
 483                                         };
 484
 485                                         // Update the `ListView`.
 486                                         domainsListView.setAdapter(undoDeleteDomainsCursorAdapter);
 487                                         // Select the previously deleted domain in `domainsListView`.
 488                                         domainsListView.setItemChecked(deletedDomainPosition, true);
 489
 490                                         // Display `domainSettingsFragment`.
 491                                         fragmentManager.beginTransaction().replace(R.id.domain_settings_fragment_container, domainSettingsFragment).commit();
 492
 493                                         // Enable the options `MenuItems`.
 494                                         deleteMenuItem.setEnabled(true);
 495                                         deleteMenuItem.setIcon(R.drawable.delete_light);
 496                                     } else {  // The device in in one-paned mode.
 497                                         // Display `domainSettingsFragment`.
 498                                         fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 499
 500                                         // Hide the add domain floating action button.
 501                                         addDomainFAB.hide();
 502
 503                                         // Show and enable `deleteMenuItem`.
 504                                         deleteMenuItem.setVisible(true);
 505
 506                                         // Display `domainSettingsFragment`.
 507                                         fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 508                                     }
 509                                 } else {  // The snackbar was dismissed without the undo button being pushed.
 510                                     // Delete the selected domain.
 511                                     domainsDatabaseHelper.deleteDomain(databaseIdToDelete);
 512
 513                                     // Enable the delete menu item if the system was waiting for a snackbar to be dismissed.
 514                                     if (dismissingSnackbar) {
 515                                         // Create a `Runnable` to enable the delete menu item.
 516                                         Runnable enableDeleteMenuItemRunnable = () -> {
 517                                             // Enable `deleteMenuItem` according to the display mode.
 518                                             if (twoPanedMode) {  // Two-paned mode.
 519                                                 // Enable the delete menu item.
 520                                                 deleteMenuItem.setEnabled(true);
 521
 522                                                 // Get a handle for the shared preferences.
 523                                                 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
 524
 525                                                 // Get the theme preferences.
 526                                                 boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 527
 528                                                 // Set the delete icon according to the theme.
 529                                                 if (darkTheme) {
 530                                                     deleteMenuItem.setIcon(R.drawable.delete_dark);
 531                                                 } else {
 532                                                     deleteMenuItem.setIcon(R.drawable.delete_light);
 533                                                 }
 534                                             } else {  // Single-paned mode.
 535                                                 // Show `deleteMenuItem`.
 536                                                 deleteMenuItem.setVisible(true);
 537                                             }
 538
 539                                             // Reset `dismissingSnackbar`.
 540                                             dismissingSnackbar = false;
 541                                         };
 542
 543                                         // Enable the delete menu icon after 100 milliseconds to make sure that the previous domain has been deleted from the database.
 544                                         Handler handler = new Handler();
 545                                         handler.postDelayed(enableDeleteMenuItemRunnable, 100);
 546                                     }
 547
 548                                     // Close the activity if back was pressed.
 549                                     if (closeActivityAfterDismissingSnackbar) {
 550                                         // Go home.
 551                                         NavUtils.navigateUpFromSameTask(activity);
 552                                     }
 553                                 }
 554                             }
 555                         });
 556
 557                 // Show the Snackbar.
 558                 undoDeleteSnackbar.show();
 559                 break;
 560         }
 561
 562         // Consume the event.
 563         return true;
 564     }
 565
 566     @Override
 567     protected void onSaveInstanceState(@NonNull Bundle outState) {
 568         // Store the current `DomainSettingsFragment` state in `outState`.
 569         if (findViewById(R.id.domain_settings_scrollview) != null) {  // `DomainSettingsFragment` is displayed.
 570             // Save any changes that have been made to the domain settings.
 571             saveDomainSettings(coordinatorLayout, resources);
 572
 573             // Store `DomainSettingsDisplayed`.
 574             outState.putBoolean("domain_settings_displayed", true);
 575             outState.putInt("domain_settings_database_id", DomainSettingsFragment.databaseId);
 576         } else {  // `DomainSettingsFragment` is not displayed.
 577             outState.putBoolean("domain_settings_displayed", false);
 578             outState.putInt("domain_settings_database_id", -1);
 579         }
 580
 581         super.onSaveInstanceState(outState);
 582     }
 583
 584     // Control what the navigation bar back button does.
 585     @Override
 586     public void onBackPressed() {
 587         // Get a handle for the fragment manager.
 588         FragmentManager fragmentManager = getSupportFragmentManager();
 589
 590         if (twoPanedMode) {  // The device is in two-paned mode.
 591             // Save the current domain settings if the domain settings fragment is displayed.
 592             if (findViewById(R.id.domain_settings_scrollview) != null) {
 593                 saveDomainSettings(coordinatorLayout, resources);
 594             }
 595
 596             // Dismiss the undo delete SnackBar if it is shown.
 597             if ((undoDeleteSnackbar != null) && undoDeleteSnackbar.isShown()) {
 598                 // Set the close flag.
 599                 closeActivityAfterDismissingSnackbar = true;
 600
 601                 // Dismiss the snackbar.
 602                 undoDeleteSnackbar.dismiss();
 603             } else {
 604                 // Pass `onBackPressed()` to the system.
 605                 super.onBackPressed();
 606             }
 607         } else if (closeOnBack) {  // Go directly back to the main WebView activity because the domains activity was launched from the options menu.
 608             // Save the current domain settings.
 609             saveDomainSettings(coordinatorLayout, resources);
 610
 611             // Pass `onBackPressed()` to the system.
 612             super.onBackPressed();
 613         } else if (findViewById(R.id.domain_settings_scrollview) != null) {  // The device is in single-paned mode and domain settings fragment is displayed.
 614             // Save the current domain settings.
 615             saveDomainSettings(coordinatorLayout, resources);
 616
 617             // Display the domains list fragment.
 618             DomainsListFragment domainsListFragment = new DomainsListFragment();
 619             fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 620             fragmentManager.executePendingTransactions();
 621
 622             // Populate the list of domains.  `-1` highlights the first domain if in two-paned mode.  It has no effect in single-paned mode.
 623             populateDomainsListView(-1);
 624
 625             // Show the add domain floating action button.
 626             addDomainFAB.show();
 627
 628             // Hide the delete menu item.
 629             deleteMenuItem.setVisible(false);
 630         } else {  // The device is in single-paned mode and the domain list fragment is displayed.
 631             // Dismiss the undo delete SnackBar if it is shown.
 632             if ((undoDeleteSnackbar != null) && undoDeleteSnackbar.isShown()) {
 633                 // Set the close flag.
 634                 closeActivityAfterDismissingSnackbar = true;
 635
 636                 // Dismiss the snackbar.
 637                 undoDeleteSnackbar.dismiss();
 638             } else {
 639                 // Pass `onBackPressed()` to the system.
 640                 super.onBackPressed();
 641             }
 642         }
 643     }
 644
 645     @Override
 646     public void onAddDomain(@NonNull DialogFragment dialogFragment) {
 647         // Dismiss the undo delete snackbar if it is currently displayed.
 648         if ((undoDeleteSnackbar != null) && undoDeleteSnackbar.isShown()) {
 649             undoDeleteSnackbar.dismiss();
 650         }
 651
 652         // Remove the incorrect lint warning below that the dialog might be null.
 653         assert dialogFragment.getDialog() != null;
 654
 655         // Get a handle for the domain name edit text.
 656         EditText domainNameEditText = dialogFragment.getDialog().findViewById(R.id.domain_name_edittext);
 657
 658         // Get the domain name string.
 659         String domainNameString = domainNameEditText.getText().toString();
 660
 661         // Create the domain and store the database ID in `currentDomainDatabaseId`.
 662         currentDomainDatabaseId = domainsDatabaseHelper.addDomain(domainNameString);
 663
 664         // Display the newly created domain.
 665         if (twoPanedMode) {  // The device in in two-paned mode.
 666             populateDomainsListView(currentDomainDatabaseId);
 667         } else {  // The device is in single-paned mode.
 668             // Hide the add domain floating action button.
 669             addDomainFAB.hide();
 670
 671             // Show and enable `deleteMenuItem`.
 672             DomainsActivity.deleteMenuItem.setVisible(true);
 673
 674             // Add the current domain database ID to the arguments bundle.
 675             Bundle argumentsBundle = new Bundle();
 676             argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, currentDomainDatabaseId);
 677
 678             // Add and arguments bundle to the domain setting fragment.
 679             DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 680             domainSettingsFragment.setArguments(argumentsBundle);
 681
 682             // Display the domain settings fragment.
 683             getSupportFragmentManager().beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 684         }
 685     }
 686
 687     public void saveDomainSettings(View view, Resources resources) {
 688         // Get handles for the domain settings.
 689         EditText domainNameEditText = view.findViewById(R.id.domain_settings_name_edittext);
 690         Switch javaScriptSwitch = view.findViewById(R.id.javascript_switch);
 691         Switch firstPartyCookiesSwitch = view.findViewById(R.id.first_party_cookies_switch);
 692         Switch thirdPartyCookiesSwitch = view.findViewById(R.id.third_party_cookies_switch);
 693         Switch domStorageSwitch = view.findViewById(R.id.dom_storage_switch);
 694         Switch formDataSwitch = view.findViewById(R.id.form_data_switch);  // Form data can be removed once the minimum API >= 26.
 695         Switch easyListSwitch = view.findViewById(R.id.easylist_switch);
 696         Switch easyPrivacySwitch = view.findViewById(R.id.easyprivacy_switch);
 697         Switch fanboysAnnoyanceSwitch = view.findViewById(R.id.fanboys_annoyance_list_switch);
 698         Switch fanboysSocialBlockingSwitch = view.findViewById(R.id.fanboys_social_blocking_list_switch);
 699         Switch ultraListSwitch = view.findViewById(R.id.ultralist_switch);
 700         Switch ultraPrivacySwitch = view.findViewById(R.id.ultraprivacy_switch);
 701         Switch blockAllThirdPartyRequestsSwitch = view.findViewById(R.id.block_all_third_party_requests_switch);
 702         Spinner userAgentSpinner = view.findViewById(R.id.user_agent_spinner);
 703         EditText customUserAgentEditText = view.findViewById(R.id.custom_user_agent_edittext);
 704         Spinner fontSizeSpinner = view.findViewById(R.id.font_size_spinner);
 705         EditText customFontSizeEditText = view.findViewById(R.id.custom_font_size_edittext);
 706         Spinner swipeToRefreshSpinner = view.findViewById(R.id.swipe_to_refresh_spinner);
 707         Spinner nightModeSpinner = view.findViewById(R.id.night_mode_spinner);
 708         Spinner wideViewportSpinner = view.findViewById(R.id.wide_viewport_spinner);
 709         Spinner displayWebpageImagesSpinner = view.findViewById(R.id.display_webpage_images_spinner);
 710         Switch pinnedSslCertificateSwitch = view.findViewById(R.id.pinned_ssl_certificate_switch);
 711         RadioButton currentWebsiteCertificateRadioButton = view.findViewById(R.id.current_website_certificate_radiobutton);
 712         Switch pinnedIpAddressesSwitch = view.findViewById(R.id.pinned_ip_addresses_switch);
 713         RadioButton currentIpAddressesRadioButton = view.findViewById(R.id.current_ip_addresses_radiobutton);
 714
 715         // Extract the data for the domain settings.
 716         String domainNameString = domainNameEditText.getText().toString();
 717         boolean javaScript = javaScriptSwitch.isChecked();
 718         boolean firstPartyCookies = firstPartyCookiesSwitch.isChecked();
 719         boolean thirdPartyCookies = thirdPartyCookiesSwitch.isChecked();
 720         boolean domStorage  = domStorageSwitch.isChecked();
 721         boolean formData = formDataSwitch.isChecked();  // Form data can be removed once the minimum API >= 26.
 722         boolean easyList = easyListSwitch.isChecked();
 723         boolean easyPrivacy = easyPrivacySwitch.isChecked();
 724         boolean fanboysAnnoyance = fanboysAnnoyanceSwitch.isChecked();
 725         boolean fanboysSocialBlocking = fanboysSocialBlockingSwitch.isChecked();
 726         boolean ultraList = ultraListSwitch.isChecked();
 727         boolean ultraPrivacy = ultraPrivacySwitch.isChecked();
 728         boolean blockAllThirdPartyRequests = blockAllThirdPartyRequestsSwitch.isChecked();
 729         int userAgentSwitchPosition = userAgentSpinner.getSelectedItemPosition();
 730         int fontSizeSwitchPosition = fontSizeSpinner.getSelectedItemPosition();
 731         int swipeToRefreshInt = swipeToRefreshSpinner.getSelectedItemPosition();
 732         int nightModeInt = nightModeSpinner.getSelectedItemPosition();
 733         int wideViewportInt = wideViewportSpinner.getSelectedItemPosition();
 734         int displayWebpageImagesInt = displayWebpageImagesSpinner.getSelectedItemPosition();
 735         boolean pinnedSslCertificate = pinnedSslCertificateSwitch.isChecked();
 736         boolean pinnedIpAddress = pinnedIpAddressesSwitch.isChecked();
 737
 738         // Initialize the user agent name string.
 739         String userAgentName;
 740
 741         // Set the user agent name.
 742         switch (userAgentSwitchPosition) {
 743             case MainWebViewActivity.DOMAINS_SYSTEM_DEFAULT_USER_AGENT:
 744                 // Set the user agent name to be `System default user agent`.
 745                 userAgentName = resources.getString(R.string.system_default_user_agent);
 746                 break;
 747
 748             case MainWebViewActivity.DOMAINS_CUSTOM_USER_AGENT:
 749                 // Set the user agent name to be the custom user agent.
 750                 userAgentName = customUserAgentEditText.getText().toString();
 751                 break;
 752
 753             default:
 754                 // Get the array of user agent names.
 755                 String[] userAgentNameArray = resources.getStringArray(R.array.user_agent_names);
 756
 757                 // 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.
 758                 userAgentName = userAgentNameArray[userAgentSwitchPosition - 1];
 759         }
 760
 761         // Initialize the font size integer.  `0` indicates the system default font size.
 762         int fontSizeInt = 0;
 763
 764         // Use a custom font size if it is selected.
 765         if (fontSizeSwitchPosition == 1) {  // A custom font size is specified.
 766             // Get the custom font size from the edit text.
 767             fontSizeInt = Integer.parseInt(customFontSizeEditText.getText().toString());
 768         }
 769
 770         // Save the domain settings.
 771         domainsDatabaseHelper.updateDomain(DomainsActivity.currentDomainDatabaseId, domainNameString, javaScript, firstPartyCookies, thirdPartyCookies, domStorage, formData, easyList, easyPrivacy,
 772                 fanboysAnnoyance, fanboysSocialBlocking, ultraList, ultraPrivacy, blockAllThirdPartyRequests, userAgentName, fontSizeInt, swipeToRefreshInt, nightModeInt, wideViewportInt,
 773                 displayWebpageImagesInt, pinnedSslCertificate, pinnedIpAddress);
 774
 775         // Update the pinned SSL certificate if a new one is checked.
 776         if (currentWebsiteCertificateRadioButton.isChecked()) {
 777             // Update the database.
 778             domainsDatabaseHelper.updatePinnedSslCertificate(currentDomainDatabaseId, sslIssuedToCName, sslIssuedToOName, sslIssuedToUName, sslIssuedByCName, sslIssuedByOName, sslIssuedByUName,
 779                     sslStartDateLong, sslEndDateLong);
 780         }
 781
 782         // Update the pinned IP addresses if new ones are checked.
 783         if (currentIpAddressesRadioButton.isChecked()) {
 784             // Update the database.
 785             domainsDatabaseHelper.updatePinnedIpAddresses(currentDomainDatabaseId, currentIpAddresses);
 786         }
 787     }
 788
 789     private void populateDomainsListView(final int highlightedDomainDatabaseId) {
 790         // get a handle for the current `domains_listview`.
 791         domainsListView = findViewById(R.id.domains_listview);
 792
 793         // Get a `Cursor` with the current contents of the domains database.
 794         Cursor domainsCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
 795
 796         // Setup `domainsCursorAdapter` with `this` context.  `false` disables `autoRequery`.
 797         CursorAdapter domainsCursorAdapter = new CursorAdapter(getApplicationContext(), domainsCursor, false) {
 798             @Override
 799             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 800                 // Inflate the individual item layout.  `false` does not attach it to the root.
 801                 return getLayoutInflater().inflate(R.layout.domain_name_linearlayout, parent, false);
 802             }
 803
 804             @Override
 805             public void bindView(View view, Context context, Cursor cursor) {
 806                 // Set the domain name.
 807                 String domainNameString = cursor.getString(cursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME));
 808                 TextView domainNameTextView = view.findViewById(R.id.domain_name_textview);
 809                 domainNameTextView.setText(domainNameString);
 810             }
 811         };
 812
 813         // Update the list view.
 814         domainsListView.setAdapter(domainsCursorAdapter);
 815
 816         // Display the domain settings in the second pane if operating in two pane mode and the database contains at least one domain.
 817         if (DomainsActivity.twoPanedMode && (domainsCursor.getCount() > 0)) {  // Two-paned mode is enabled and there is at least one domain.
 818             // Initialize `highlightedDomainPosition`.
 819             int highlightedDomainPosition = 0;
 820
 821             // Get the cursor position for the highlighted domain.
 822             for (int i = 0; i < domainsCursor.getCount(); i++) {
 823                 // Move to position `i` in the cursor.
 824                 domainsCursor.moveToPosition(i);
 825
 826                 // Get the database ID for this position.
 827                 int currentDatabaseId = domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper._ID));
 828
 829                 // Set `highlightedDomainPosition` if the database ID for this matches `highlightedDomainDatabaseId`.
 830                 if (highlightedDomainDatabaseId == currentDatabaseId) {
 831                     highlightedDomainPosition = i;
 832                 }
 833             }
 834
 835             // Select the highlighted domain.
 836             domainsListView.setItemChecked(highlightedDomainPosition, true);
 837
 838             // Get the database ID for the highlighted domain.
 839             domainsCursor.moveToPosition(highlightedDomainPosition);
 840             currentDomainDatabaseId = domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper._ID));
 841
 842             // Store the database ID in the arguments bundle.
 843             Bundle argumentsBundle = new Bundle();
 844             argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, currentDomainDatabaseId);
 845
 846             // Add and arguments bundle to the domain settings fragment.
 847             DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 848             domainSettingsFragment.setArguments(argumentsBundle);
 849
 850             // Display the domain settings fragment.
 851             getSupportFragmentManager().beginTransaction().replace(R.id.domain_settings_fragment_container, domainSettingsFragment).commit();
 852
 853             // Enable the delete options menu items.
 854             deleteMenuItem.setEnabled(true);
 855
 856             // Get a handle for the shared preferences.
 857             SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 858
 859             // Get the theme and screenshot preferences.
 860             boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 861
 862             // Set the delete icon according to the theme.
 863             if (darkTheme) {
 864                 deleteMenuItem.setIcon(R.drawable.delete_dark);
 865             } else {
 866                 deleteMenuItem.setIcon(R.drawable.delete_light);
 867             }
 868         } else if (twoPanedMode) {  // Two-paned mode is enabled but there are no domains.
 869             // Disable the options `MenuItems`.
 870             deleteMenuItem.setEnabled(false);
 871             deleteMenuItem.setIcon(R.drawable.delete_blue);
 872         }
 873     }
 874
 875     @Override
 876     public void dismissSnackbar() {
 877         // Dismiss the undo delete snackbar if it is shown.
 878         if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
 879             // Dismiss the snackbar.
 880             undoDeleteSnackbar.dismiss();
 881         }
 882     }
 883
 884     @Override
 885     public void onDestroy() {
 886         // Close the domains database helper.
 887         domainsDatabaseHelper.close();
 888
 889         // Run the default commands.
 890         super.onDestroy();
 891     }
 892 }