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

   1 /*
   2  * Copyright © 2017-2019 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.appcompat.app.ActionBar;
  45 import androidx.appcompat.app.AppCompatActivity;
  46 import androidx.appcompat.widget.Toolbar;  // The AndroidX toolbar must be used until the minimum API is >= 21.
  47 import androidx.core.app.NavUtils;
  48 import androidx.fragment.app.DialogFragment;
  49 import androidx.fragment.app.FragmentManager;  // The AndroidX dialog fragment must be used or an error is produced on API <=22.
  50
  51 import com.google.android.material.floatingactionbutton.FloatingActionButton;
  52 import com.google.android.material.snackbar.Snackbar;
  53
  54 import com.stoutner.privacybrowser.R;
  55 import com.stoutner.privacybrowser.dialogs.AddDomainDialog;
  56 import com.stoutner.privacybrowser.fragments.DomainSettingsFragment;
  57 import com.stoutner.privacybrowser.fragments.DomainsListFragment;
  58 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
  59
  60 import java.util.Objects;
  61
  62 public class DomainsActivity extends AppCompatActivity implements AddDomainDialog.AddDomainListener, DomainsListFragment.DismissSnackbarInterface {
  63     // `twoPanedMode` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onCreate()`, `onCreateOptionsMenu()`, and `populateDomainsListView()`.
  64     public static boolean twoPanedMode;
  65
  66     // `databaseId` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onCreateOptionsMenu()`, `saveDomainSettings()` and `populateDomainsListView()`.
  67     public static int currentDomainDatabaseId;
  68
  69     // `deleteMenuItem` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onCreateOptionsMenu()`, `onOptionsItemSelected()`, and `onBackPressed()`.
  70     public static MenuItem deleteMenuItem;
  71
  72     // `dismissingSnackbar` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onOptionsItemSelected()`.
  73     public static boolean dismissingSnackbar;
  74
  75     // The SSL certificate and IP address information are accessed from `DomainSettingsFragment` and `saveDomainSettings()`.
  76     public static String sslIssuedToCName;
  77     public static String sslIssuedToOName;
  78     public static String sslIssuedToUName;
  79     public static String sslIssuedByCName;
  80     public static String sslIssuedByOName;
  81     public static String sslIssuedByUName;
  82     public static long sslStartDateLong;
  83     public static long sslEndDateLong;
  84     public static String currentIpAddresses;
  85
  86
  87     // `closeActivityAfterDismissingSnackbar` is used in `onOptionsItemSelected()`, and `onBackPressed()`.
  88     private boolean closeActivityAfterDismissingSnackbar;
  89
  90     // The undelete snackbar is used in `onOptionsItemSelected()` and `onBackPressed()`.
  91     private Snackbar undoDeleteSnackbar;
  92
  93     // `domainsDatabaseHelper` is used in `onCreate()`, `saveDomainSettings()`, and `onDestroy()`.
  94     private static DomainsDatabaseHelper domainsDatabaseHelper;
  95
  96     // `domainsListView` is used in `onCreate()` and `populateDomainsList()`.
  97     private ListView domainsListView;
  98
  99     // `addDomainFAB` is used in `onCreate()`, `onCreateOptionsMenu()`, `onOptionsItemSelected()`, and `onBackPressed()`.
 100     private FloatingActionButton addDomainFAB;
 101
 102     // `deletedDomainPosition` is used in an inner and outer class in `onOptionsItemSelected()`.
 103     private int deletedDomainPosition;
 104
 105     // `restartAfterRotate` is used in `onCreate()` and `onCreateOptionsMenu()`.
 106     private boolean restartAfterRotate;
 107
 108     // `domainSettingsDisplayedBeforeRotate` is used in `onCreate()` and `onCreateOptionsMenu()`.
 109     private boolean domainSettingsDisplayedBeforeRotate;
 110
 111     // `domainSettingsDatabaseIdBeforeRotate` is used in `onCreate()` and `onCreateOptionsMenu()`.
 112     private int domainSettingsDatabaseIdBeforeRotate;
 113
 114     // `goDirectlyToDatabaseId` is used in `onCreate()` and `onCreateOptionsMenu()`.
 115     private int goDirectlyToDatabaseId;
 116
 117     // `closeOnBack` is used in `onCreate()`, `onOptionsItemSelected()` and `onBackPressed()`.
 118     private boolean closeOnBack;
 119
 120     // `coordinatorLayout` is use in `onCreate()`, `onOptionsItemSelected()`, and `onSaveInstanceState()`.
 121     private View coordinatorLayout;
 122
 123     // `resources` is used in `onCreate()`, `onOptionsItemSelected()`, and `onSaveInstanceState()`.
 124     private Resources resources;
 125
 126     @Override
 127     protected void onCreate(Bundle savedInstanceState) {
 128         // Get a handle for the shared preferences.
 129         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 130
 131         // Get the theme and screenshot preferences.
 132         boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 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 activity theme.
 141         if (darkTheme) {
 142             setTheme(R.style.PrivacyBrowserDark_SecondaryActivity);
 143         } else {
 144             setTheme(R.style.PrivacyBrowserLight_SecondaryActivity);
 145         }
 146
 147         // Run the default commands.
 148         super.onCreate(savedInstanceState);
 149
 150         // Extract the values from `savedInstanceState` if it is not `null`.
 151         if (savedInstanceState != null) {
 152             restartAfterRotate = true;
 153             domainSettingsDisplayedBeforeRotate = savedInstanceState.getBoolean("domain_settings_displayed");
 154             domainSettingsDatabaseIdBeforeRotate = savedInstanceState.getInt("domain_settings_database_id");
 155         }
 156
 157         // Get the launching intent
 158         Intent intent = getIntent();
 159
 160         // Extract the domain to load if there is one.  `-1` is the default value.
 161         goDirectlyToDatabaseId = intent.getIntExtra("load_domain", -1);
 162
 163         // Get the status of close-on-back, which is true when the domains activity is called from the options menu.
 164         closeOnBack = intent.getBooleanExtra("close_on_back", false);
 165
 166         // Get the current URL.
 167         String currentUrl = intent.getStringExtra("current_url");
 168
 169         // Store the current SSL certificate information in class variables.
 170         sslIssuedToCName = intent.getStringExtra("ssl_issued_to_cname");
 171         sslIssuedToOName = intent.getStringExtra("ssl_issued_to_oname");
 172         sslIssuedToUName = intent.getStringExtra("ssl_issued_to_uname");
 173         sslIssuedByCName = intent.getStringExtra("ssl_issued_by_cname");
 174         sslIssuedByOName = intent.getStringExtra("ssl_issued_by_oname");
 175         sslIssuedByUName = intent.getStringExtra("ssl_issued_by_uname");
 176         sslStartDateLong = intent.getLongExtra("ssl_start_date", 0);
 177         sslEndDateLong = intent.getLongExtra("ssl_end_date", 0);
 178         currentIpAddresses = intent.getStringExtra("current_ip_addresses");
 179
 180         // Set the content view.
 181         setContentView(R.layout.domains_coordinatorlayout);
 182
 183         // Populate the class variables.
 184         coordinatorLayout = findViewById(R.id.domains_coordinatorlayout);
 185         resources = getResources();
 186
 187         // `SupportActionBar` from `android.support.v7.app.ActionBar` must be used until the minimum API is >= 21.
 188         final Toolbar toolbar = findViewById(R.id.domains_toolbar);
 189         setSupportActionBar(toolbar);
 190
 191         // Get a handle for the action bar.
 192         ActionBar actionBar = getSupportActionBar();
 193
 194         // Remove the incorrect lint warning that the action bar might be null.
 195         assert actionBar != null;
 196
 197         // Set the back arrow on the action bar.
 198         actionBar.setDisplayHomeAsUpEnabled(true);
 199
 200         // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
 201         domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
 202
 203         // Determine if we are in two pane mode.  `domain_settings_fragment_container` does not exist on devices with a width less than 900dp.
 204         twoPanedMode = (findViewById(R.id.domain_settings_fragment_container) != null);
 205
 206         // Get a handle for the add domain floating action button.
 207         addDomainFAB = findViewById(R.id.add_domain_fab);
 208
 209         // Configure the add domain floating action button.
 210         addDomainFAB.setOnClickListener((View view) -> {
 211             // Create an add domain dialog.
 212             DialogFragment addDomainDialog = AddDomainDialog.addDomain(currentUrl);
 213
 214             // Show the add domain dialog.
 215             addDomainDialog.show(getSupportFragmentManager(), resources.getString(R.string.add_domain));
 216         });
 217     }
 218
 219     @Override
 220     public boolean onCreateOptionsMenu(Menu menu) {
 221         // Inflate the menu.
 222         getMenuInflater().inflate(R.menu.domains_options_menu, menu);
 223
 224         // Store `deleteMenuItem` for future use.
 225         deleteMenuItem = menu.findItem(R.id.delete_domain);
 226
 227         // Only display `deleteMenuItem` (initially) in two-paned mode.
 228         deleteMenuItem.setVisible(twoPanedMode);
 229
 230         // Get a handle for the fragment manager.
 231         FragmentManager fragmentManager = getSupportFragmentManager();
 232
 233         // Display the fragments.  This must be done from `onCreateOptionsMenu()` instead of `onCreate()` because `populateDomainsListView()` needs `deleteMenuItem` to be inflated.
 234         if (restartAfterRotate && domainSettingsDisplayedBeforeRotate) {  // The device was rotated and domain settings were displayed previously.
 235             if (twoPanedMode) {  // The device is in two-paned mode.
 236                 // Reset `restartAfterRotate`.
 237                 restartAfterRotate = false;
 238
 239                 // Display `DomainsListFragment`.
 240                 DomainsListFragment domainsListFragment = new DomainsListFragment();
 241                 fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 242                 fragmentManager.executePendingTransactions();
 243
 244                 // Populate the list of domains.  `domainSettingsDatabaseId` highlights the domain that was highlighted before the rotation.
 245                 populateDomainsListView(domainSettingsDatabaseIdBeforeRotate);
 246             } else {  // The device is in single-paned mode.
 247                 // Reset `restartAfterRotate`.
 248                 restartAfterRotate = false;
 249
 250                 // Store the current domain database ID.
 251                 currentDomainDatabaseId = domainSettingsDatabaseIdBeforeRotate;
 252
 253                 // Add `currentDomainDatabaseId` to `argumentsBundle`.
 254                 Bundle argumentsBundle = new Bundle();
 255                 argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, currentDomainDatabaseId);
 256
 257                 // Add `argumentsBundle` to `domainSettingsFragment`.
 258                 DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 259                 domainSettingsFragment.setArguments(argumentsBundle);
 260
 261                 // Show `deleteMenuItem`.
 262                 deleteMenuItem.setVisible(true);
 263
 264                 // Hide the add domain floating action button.
 265                 addDomainFAB.hide();
 266
 267                 // Display `domainSettingsFragment`.
 268                 fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 269             }
 270         } else {  // The device was not rotated or, if it was, domain settings were not displayed previously.
 271             if (goDirectlyToDatabaseId >=0) {  // Load the indicated domain settings.
 272                 // Store the current domain database ID.
 273                 currentDomainDatabaseId = goDirectlyToDatabaseId;
 274
 275                 if (twoPanedMode) {  // The device is in two-paned mode.
 276                     // Display `DomainsListFragment`.
 277                     DomainsListFragment domainsListFragment = new DomainsListFragment();
 278                     fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 279                     fragmentManager.executePendingTransactions();
 280
 281                     // Populate the list of domains.  `domainSettingsDatabaseId` highlights the domain that was highlighted before the rotation.
 282                     populateDomainsListView(goDirectlyToDatabaseId);
 283                 } else {  // The device is in single-paned mode.
 284                     // Add the domain ID to be loaded to `argumentsBundle`.
 285                     Bundle argumentsBundle = new Bundle();
 286                     argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, goDirectlyToDatabaseId);
 287
 288                     // Add `argumentsBundle` to `domainSettingsFragment`.
 289                     DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 290                     domainSettingsFragment.setArguments(argumentsBundle);
 291
 292                     // Show `deleteMenuItem`.
 293                     deleteMenuItem.setVisible(true);
 294
 295                     // Hide the add domain floating action button.
 296                     addDomainFAB.hide();
 297
 298                     // Display `domainSettingsFragment`.
 299                     fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 300                 }
 301             } else {  // Highlight the first domain.
 302                 // Display `DomainsListFragment`.
 303                 DomainsListFragment domainsListFragment = new DomainsListFragment();
 304                 fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 305                 fragmentManager.executePendingTransactions();
 306
 307                 // Populate the list of domains.  `-1` highlights the first domain.
 308                 populateDomainsListView(-1);
 309             }
 310         }
 311
 312         // Success!
 313         return true;
 314     }
 315
 316     @Override
 317     public boolean onOptionsItemSelected(MenuItem menuItem) {
 318         // Get the ID of the menu item that was selected.
 319         int menuItemID = menuItem.getItemId();
 320
 321         // Get a handle for the fragment manager.
 322         FragmentManager fragmentManager = getSupportFragmentManager();
 323
 324         switch (menuItemID) {
 325             case android.R.id.home:  // The home arrow is identified as `android.R.id.home`, not just `R.id.home`.
 326                 if (twoPanedMode) {  // The device is in two-paned mode.
 327                     // Save the current domain settings if the domain settings fragment is displayed.
 328                     if (findViewById(R.id.domain_settings_scrollview) != null) {
 329                         saveDomainSettings(coordinatorLayout, resources);
 330                     }
 331
 332                     // Dismiss the undo delete `SnackBar` if it is shown.
 333                     if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
 334                         // Set the close flag.
 335                         closeActivityAfterDismissingSnackbar = true;
 336
 337                         // Dismiss the snackbar.
 338                         undoDeleteSnackbar.dismiss();
 339                     } else {
 340                         // Go home.
 341                         NavUtils.navigateUpFromSameTask(this);
 342                     }
 343                 } else if (closeOnBack) {  // Go directly back to the main WebView activity because the domains activity was launched from the options menu.
 344                     // Save the current domain settings.
 345                     saveDomainSettings(coordinatorLayout, resources);
 346
 347                     // Go home.
 348                     NavUtils.navigateUpFromSameTask(this);
 349                 } else if (findViewById(R.id.domain_settings_scrollview) != null) {  // The device is in single-paned mode and the domain settings fragment is displayed.
 350                     // Save the current domain settings.
 351                     saveDomainSettings(coordinatorLayout, resources);
 352
 353                     // Display the domains list fragment.
 354                     DomainsListFragment domainsListFragment = new DomainsListFragment();
 355                     fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 356                     fragmentManager.executePendingTransactions();
 357
 358                     // Populate the list of domains.  `-1` highlights the first domain if in two-paned mode.  It has no effect in single-paned mode.
 359                     populateDomainsListView(-1);
 360
 361                     // Show the add domain floating action button.
 362                     addDomainFAB.show();
 363
 364                     // Hide the delete menu item.
 365                     deleteMenuItem.setVisible(false);
 366                 } else {  // The device is in single-paned mode and `DomainsListFragment` is displayed.
 367                     // Dismiss the undo delete `SnackBar` if it is shown.
 368                     if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
 369                         // Set the close flag.
 370                         closeActivityAfterDismissingSnackbar = true;
 371
 372                         // Dismiss the snackbar.
 373                         undoDeleteSnackbar.dismiss();
 374                     } else {
 375                         // Go home.
 376                         NavUtils.navigateUpFromSameTask(this);
 377                     }
 378                 }
 379                 break;
 380
 381             case R.id.delete_domain:
 382                 // Reset close-on-back, which otherwise can cause errors if the system attempts to save settings for a domain that no longer exists.
 383                 closeOnBack = false;
 384
 385                 // Store a copy of `currentDomainDatabaseId` because it could change while the `Snackbar` is displayed.
 386                 final int databaseIdToDelete = currentDomainDatabaseId;
 387
 388                 // Update the fragments and menu items.
 389                 if (twoPanedMode) {  // Two-paned mode.
 390                     // Store the deleted domain position, which is needed if `Undo` is selected in the `Snackbar`.
 391                     deletedDomainPosition = domainsListView.getCheckedItemPosition();
 392
 393                     // Disable the options `MenuItems`.
 394                     deleteMenuItem.setEnabled(false);
 395                     deleteMenuItem.setIcon(R.drawable.delete_blue);
 396
 397                     // Remove the domain settings fragment.
 398                     fragmentManager.beginTransaction().remove(Objects.requireNonNull(fragmentManager.findFragmentById(R.id.domain_settings_fragment_container))).commit();
 399                 } else {  // Single-paned mode.
 400                     // Display `DomainsListFragment`.
 401                     DomainsListFragment domainsListFragment = new DomainsListFragment();
 402                     fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 403                     fragmentManager.executePendingTransactions();
 404
 405                     // Show the add domain floating action button.
 406                     addDomainFAB.show();
 407
 408                     // Hide `deleteMenuItem`.
 409                     deleteMenuItem.setVisible(false);
 410                 }
 411
 412                 // Get a `Cursor` that does not show the domain to be deleted.
 413                 Cursor domainsPendingDeleteCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomainExcept(databaseIdToDelete);
 414
 415                 // Setup `domainsPendingDeleteCursorAdapter` with `this` context.  `false` disables `autoRequery`.
 416                 CursorAdapter domainsPendingDeleteCursorAdapter = new CursorAdapter(this, domainsPendingDeleteCursor, false) {
 417                     @Override
 418                     public View newView(Context context, Cursor cursor, ViewGroup parent) {
 419                         // Inflate the individual item layout.  `false` does not attach it to the root.
 420                         return getLayoutInflater().inflate(R.layout.domain_name_linearlayout, parent, false);
 421                     }
 422
 423                     @Override
 424                     public void bindView(View view, Context context, Cursor cursor) {
 425                         // Set the domain name.
 426                         String domainNameString = cursor.getString(cursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME));
 427                         TextView domainNameTextView = view.findViewById(R.id.domain_name_textview);
 428                         domainNameTextView.setText(domainNameString);
 429                     }
 430                 };
 431
 432                 // Update the handle for the current `domains_listview`.
 433                 domainsListView = findViewById(R.id.domains_listview);
 434
 435                 // Update the `ListView`.
 436                 domainsListView.setAdapter(domainsPendingDeleteCursorAdapter);
 437
 438                 // Get a handle for the activity.
 439                 Activity activity = this;
 440
 441                 // Display a `Snackbar`.
 442                 undoDeleteSnackbar = Snackbar.make(domainsListView, R.string.domain_deleted, Snackbar.LENGTH_LONG)
 443                         .setAction(R.string.undo, (View v) -> {
 444                             // Do nothing because everything will be handled by `onDismissed()` below.
 445                         })
 446                         .addCallback(new Snackbar.Callback() {
 447                             @Override
 448                             public void onDismissed(Snackbar snackbar, int event) {
 449                                 // Run commands based on the event.
 450                                 if (event == Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The user pushed the `Undo` button.
 451                                     // Store the database ID in arguments bundle.
 452                                     Bundle argumentsBundle = new Bundle();
 453                                     argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, databaseIdToDelete);
 454
 455                                     // Add the arguments bundle to the domain settings fragment.
 456                                     DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 457                                     domainSettingsFragment.setArguments(argumentsBundle);
 458
 459                                     // Display the correct fragments.
 460                                     if (twoPanedMode) {  // The device in in two-paned mode.
 461                                         // Get a `Cursor` with the current contents of the domains database.
 462                                         Cursor undoDeleteDomainsCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
 463
 464                                         // Setup `domainsCursorAdapter` with `this` context.  `false` disables `autoRequery`.
 465                                         CursorAdapter undoDeleteDomainsCursorAdapter = new CursorAdapter(getApplicationContext(), undoDeleteDomainsCursor, false) {
 466                                             @Override
 467                                             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 468                                                 // Inflate the individual item layout.  `false` does not attach it to the root.
 469                                                 return getLayoutInflater().inflate(R.layout.domain_name_linearlayout, parent, false);
 470                                             }
 471
 472                                             @Override
 473                                             public void bindView(View view, Context context, Cursor cursor) {
 474                                                 // Set the domain name.
 475                                                 String domainNameString = cursor.getString(cursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME));
 476                                                 TextView domainNameTextView = view.findViewById(R.id.domain_name_textview);
 477                                                 domainNameTextView.setText(domainNameString);
 478                                             }
 479                                         };
 480
 481                                         // Update the `ListView`.
 482                                         domainsListView.setAdapter(undoDeleteDomainsCursorAdapter);
 483                                         // Select the previously deleted domain in `domainsListView`.
 484                                         domainsListView.setItemChecked(deletedDomainPosition, true);
 485
 486                                         // Display `domainSettingsFragment`.
 487                                         fragmentManager.beginTransaction().replace(R.id.domain_settings_fragment_container, domainSettingsFragment).commit();
 488
 489                                         // Enable the options `MenuItems`.
 490                                         deleteMenuItem.setEnabled(true);
 491                                         deleteMenuItem.setIcon(R.drawable.delete_light);
 492                                     } else {  // The device in in one-paned mode.
 493                                         // Display `domainSettingsFragment`.
 494                                         fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 495
 496                                         // Hide the add domain floating action button.
 497                                         addDomainFAB.hide();
 498
 499                                         // Show and enable `deleteMenuItem`.
 500                                         deleteMenuItem.setVisible(true);
 501
 502                                         // Display `domainSettingsFragment`.
 503                                         fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 504                                     }
 505                                 } else {  // The snackbar was dismissed without the undo button being pushed.
 506                                     // Delete the selected domain.
 507                                     domainsDatabaseHelper.deleteDomain(databaseIdToDelete);
 508
 509                                     // Enable the delete menu item if the system was waiting for a snackbar to be dismissed.
 510                                     if (dismissingSnackbar) {
 511                                         // Create a `Runnable` to enable the delete menu item.
 512                                         Runnable enableDeleteMenuItemRunnable = () -> {
 513                                             // Enable `deleteMenuItem` according to the display mode.
 514                                             if (twoPanedMode) {  // Two-paned mode.
 515                                                 // Enable the delete menu item.
 516                                                 deleteMenuItem.setEnabled(true);
 517
 518                                                 // Get a handle for the shared preferences.
 519                                                 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
 520
 521                                                 // Get the theme preferences.
 522                                                 boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 523
 524                                                 // Set the delete icon according to the theme.
 525                                                 if (darkTheme) {
 526                                                     deleteMenuItem.setIcon(R.drawable.delete_dark);
 527                                                 } else {
 528                                                     deleteMenuItem.setIcon(R.drawable.delete_light);
 529                                                 }
 530                                             } else {  // Single-paned mode.
 531                                                 // Show `deleteMenuItem`.
 532                                                 deleteMenuItem.setVisible(true);
 533                                             }
 534
 535                                             // Reset `dismissingSnackbar`.
 536                                             dismissingSnackbar = false;
 537                                         };
 538
 539                                         // Enable the delete menu icon after 100 milliseconds to make sure that the previous domain has been deleted from the database.
 540                                         Handler handler = new Handler();
 541                                         handler.postDelayed(enableDeleteMenuItemRunnable, 100);
 542                                     }
 543
 544                                     // Close the activity if back was pressed.
 545                                     if (closeActivityAfterDismissingSnackbar) {
 546                                         // Go home.
 547                                         NavUtils.navigateUpFromSameTask(activity);
 548                                     }
 549                                 }
 550                             }
 551                         });
 552
 553                 // Show the Snackbar.
 554                 undoDeleteSnackbar.show();
 555                 break;
 556         }
 557
 558         // Consume the event.
 559         return true;
 560     }
 561
 562     @Override
 563     protected void onSaveInstanceState(Bundle outState) {
 564         // Store the current `DomainSettingsFragment` state in `outState`.
 565         if (findViewById(R.id.domain_settings_scrollview) != null) {  // `DomainSettingsFragment` is displayed.
 566             // Save any changes that have been made to the domain settings.
 567             saveDomainSettings(coordinatorLayout, resources);
 568
 569             // Store `DomainSettingsDisplayed`.
 570             outState.putBoolean("domain_settings_displayed", true);
 571             outState.putInt("domain_settings_database_id", DomainSettingsFragment.databaseId);
 572         } else {  // `DomainSettingsFragment` is not displayed.
 573             outState.putBoolean("domain_settings_displayed", false);
 574             outState.putInt("domain_settings_database_id", -1);
 575         }
 576
 577         super.onSaveInstanceState(outState);
 578     }
 579
 580     // Control what the navigation bar back button does.
 581     @Override
 582     public void onBackPressed() {
 583         // Get a handle for the fragment manager.
 584         FragmentManager fragmentManager = getSupportFragmentManager();
 585
 586         if (twoPanedMode) {  // The device is in two-paned mode.
 587             // Save the current domain settings if the domain settings fragment is displayed.
 588             if (findViewById(R.id.domain_settings_scrollview) != null) {
 589                 saveDomainSettings(coordinatorLayout, resources);
 590             }
 591
 592             // Dismiss the undo delete SnackBar if it is shown.
 593             if ((undoDeleteSnackbar != null) && undoDeleteSnackbar.isShown()) {
 594                 // Set the close flag.
 595                 closeActivityAfterDismissingSnackbar = true;
 596
 597                 // Dismiss the snackbar.
 598                 undoDeleteSnackbar.dismiss();
 599             } else {
 600                 // Pass `onBackPressed()` to the system.
 601                 super.onBackPressed();
 602             }
 603         } else if (closeOnBack) {  // Go directly back to the main WebView activity because the domains activity was launched from the options menu.
 604             // Save the current domain settings.
 605             saveDomainSettings(coordinatorLayout, resources);
 606
 607             // Pass `onBackPressed()` to the system.
 608             super.onBackPressed();
 609         } else if (findViewById(R.id.domain_settings_scrollview) != null) {  // The device is in single-paned mode and domain settings fragment is displayed.
 610             // Save the current domain settings.
 611             saveDomainSettings(coordinatorLayout, resources);
 612
 613             // Display the domains list fragment.
 614             DomainsListFragment domainsListFragment = new DomainsListFragment();
 615             fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 616             fragmentManager.executePendingTransactions();
 617
 618             // Populate the list of domains.  `-1` highlights the first domain if in two-paned mode.  It has no effect in single-paned mode.
 619             populateDomainsListView(-1);
 620
 621             // Show the add domain floating action button.
 622             addDomainFAB.show();
 623
 624             // Hide the delete menu item.
 625             deleteMenuItem.setVisible(false);
 626         } else {  // The device is in single-paned mode and the domain list fragment is displayed.
 627             // Dismiss the undo delete SnackBar if it is shown.
 628             if ((undoDeleteSnackbar != null) && undoDeleteSnackbar.isShown()) {
 629                 // Set the close flag.
 630                 closeActivityAfterDismissingSnackbar = true;
 631
 632                 // Dismiss the snackbar.
 633                 undoDeleteSnackbar.dismiss();
 634             } else {
 635                 // Pass `onBackPressed()` to the system.
 636                 super.onBackPressed();
 637             }
 638         }
 639     }
 640
 641     @Override
 642     public void onAddDomain(DialogFragment dialogFragment) {
 643         // Dismiss the undo delete snackbar if it is currently displayed.
 644         if ((undoDeleteSnackbar != null) && undoDeleteSnackbar.isShown()) {
 645             undoDeleteSnackbar.dismiss();
 646         }
 647
 648         // Get the new domain name String from the dialog fragment.
 649         EditText domainNameEditText = dialogFragment.getDialog().findViewById(R.id.domain_name_edittext);
 650         String domainNameString = domainNameEditText.getText().toString();
 651
 652         // Create the domain and store the database ID in `currentDomainDatabaseId`.
 653         currentDomainDatabaseId = domainsDatabaseHelper.addDomain(domainNameString);
 654
 655         // Display the newly created domain.
 656         if (twoPanedMode) {  // The device in in two-paned mode.
 657             populateDomainsListView(currentDomainDatabaseId);
 658         } else {  // The device is in single-paned mode.
 659             // Hide the add domain floating action button.
 660             addDomainFAB.hide();
 661
 662             // Show and enable `deleteMenuItem`.
 663             DomainsActivity.deleteMenuItem.setVisible(true);
 664
 665             // Add the current domain database ID to the arguments bundle.
 666             Bundle argumentsBundle = new Bundle();
 667             argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, currentDomainDatabaseId);
 668
 669             // Add and arguments bundle to the domain setting fragment.
 670             DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 671             domainSettingsFragment.setArguments(argumentsBundle);
 672
 673             // Display the domain settings fragment.
 674             getSupportFragmentManager().beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 675         }
 676     }
 677
 678     public void saveDomainSettings(View view, Resources resources) {
 679         // Get handles for the domain settings.
 680         EditText domainNameEditText = view.findViewById(R.id.domain_settings_name_edittext);
 681         Switch javaScriptSwitch = view.findViewById(R.id.javascript_switch);
 682         Switch firstPartyCookiesSwitch = view.findViewById(R.id.first_party_cookies_switch);
 683         Switch thirdPartyCookiesSwitch = view.findViewById(R.id.third_party_cookies_switch);
 684         Switch domStorageSwitch = view.findViewById(R.id.dom_storage_switch);
 685         Switch formDataSwitch = view.findViewById(R.id.form_data_switch);  // Form data can be removed once the minimum API >= 26.
 686         Switch easyListSwitch = view.findViewById(R.id.easylist_switch);
 687         Switch easyPrivacySwitch = view.findViewById(R.id.easyprivacy_switch);
 688         Switch fanboysAnnoyanceSwitch = view.findViewById(R.id.fanboys_annoyance_list_switch);
 689         Switch fanboysSocialBlockingSwitch = view.findViewById(R.id.fanboys_social_blocking_list_switch);
 690         Switch ultraPrivacySwitch = view.findViewById(R.id.ultraprivacy_switch);
 691         Switch blockAllThirdPartyRequestsSwitch = view.findViewById(R.id.block_all_third_party_requests_switch);
 692         Spinner userAgentSpinner = view.findViewById(R.id.user_agent_spinner);
 693         EditText customUserAgentEditText = view.findViewById(R.id.custom_user_agent_edittext);
 694         Spinner fontSizeSpinner = view.findViewById(R.id.font_size_spinner);
 695         Spinner swipeToRefreshSpinner = view.findViewById(R.id.swipe_to_refresh_spinner);
 696         Spinner displayWebpageImagesSpinner = view.findViewById(R.id.display_webpage_images_spinner);
 697         Spinner nightModeSpinner = view.findViewById(R.id.night_mode_spinner);
 698         Switch pinnedSslCertificateSwitch = view.findViewById(R.id.pinned_ssl_certificate_switch);
 699         RadioButton currentWebsiteCertificateRadioButton = view.findViewById(R.id.current_website_certificate_radiobutton);
 700         Switch pinnedIpAddressesSwitch = view.findViewById(R.id.pinned_ip_addresses_switch);
 701         RadioButton currentIpAddressesRadioButton = view.findViewById(R.id.current_ip_addresses_radiobutton);
 702
 703         // Extract the data for the domain settings.
 704         String domainNameString = domainNameEditText.getText().toString();
 705         boolean javaScriptEnabled = javaScriptSwitch.isChecked();
 706         boolean firstPartyCookiesEnabled = firstPartyCookiesSwitch.isChecked();
 707         boolean thirdPartyCookiesEnabled = thirdPartyCookiesSwitch.isChecked();
 708         boolean domStorageEnabled  = domStorageSwitch.isChecked();
 709         boolean formDataEnabled = formDataSwitch.isChecked();  // Form data can be removed once the minimum API >= 26.
 710         boolean easyListEnabled = easyListSwitch.isChecked();
 711         boolean easyPrivacyEnabled = easyPrivacySwitch.isChecked();
 712         boolean fanboysAnnoyanceEnabled = fanboysAnnoyanceSwitch.isChecked();
 713         boolean fanboysSocialBlockingEnabled = fanboysSocialBlockingSwitch.isChecked();
 714         boolean ultraPrivacyEnabled = ultraPrivacySwitch.isChecked();
 715         boolean blockAllThirdPartyRequests = blockAllThirdPartyRequestsSwitch.isChecked();
 716         int userAgentPosition = userAgentSpinner.getSelectedItemPosition();
 717         int fontSizePosition = fontSizeSpinner.getSelectedItemPosition();
 718         int swipeToRefreshInt = swipeToRefreshSpinner.getSelectedItemPosition();
 719         int displayWebpageImagesInt = displayWebpageImagesSpinner.getSelectedItemPosition();
 720         int nightModeInt = nightModeSpinner.getSelectedItemPosition();
 721         boolean pinnedSslCertificate = pinnedSslCertificateSwitch.isChecked();
 722         boolean pinnedIpAddress = pinnedIpAddressesSwitch.isChecked();
 723
 724         // Initialize the user agent name string.
 725         String userAgentName;
 726
 727         // Set the user agent name.
 728         switch (userAgentPosition) {
 729             case MainWebViewActivity.DOMAINS_SYSTEM_DEFAULT_USER_AGENT:
 730                 // Set the user agent name to be `System default user agent`.
 731                 userAgentName = resources.getString(R.string.system_default_user_agent);
 732                 break;
 733
 734             case MainWebViewActivity.DOMAINS_CUSTOM_USER_AGENT:
 735                 // Set the user agent name to be the custom user agent.
 736                 userAgentName = customUserAgentEditText.getText().toString();
 737                 break;
 738
 739             default:
 740                 // Get the array of user agent names.
 741                 String[] userAgentNameArray = resources.getStringArray(R.array.user_agent_names);
 742
 743                 // 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.
 744                 userAgentName = userAgentNameArray[userAgentPosition - 1];
 745         }
 746
 747         // Get the font size integer.
 748         int fontSizeInt = Integer.parseInt(resources.getStringArray(R.array.domain_settings_font_size_entry_values)[fontSizePosition]);
 749
 750         // Save the domain settings.
 751         domainsDatabaseHelper.updateDomain(DomainsActivity.currentDomainDatabaseId, domainNameString, javaScriptEnabled, firstPartyCookiesEnabled, thirdPartyCookiesEnabled,
 752                     domStorageEnabled, formDataEnabled, easyListEnabled, easyPrivacyEnabled, fanboysAnnoyanceEnabled, fanboysSocialBlockingEnabled, ultraPrivacyEnabled, blockAllThirdPartyRequests,
 753                     userAgentName, fontSizeInt, swipeToRefreshInt, nightModeInt, displayWebpageImagesInt, pinnedSslCertificate, pinnedIpAddress);
 754
 755         // Update the pinned SSL certificate if a new one is checked.
 756         if (currentWebsiteCertificateRadioButton.isChecked()) {
 757             // Update the database.
 758             domainsDatabaseHelper.updatePinnedSslCertificate(currentDomainDatabaseId, sslIssuedToCName, sslIssuedToOName, sslIssuedToUName, sslIssuedToCName, sslIssuedToOName, sslIssuedToUName,
 759                     sslStartDateLong, sslEndDateLong);
 760         }
 761
 762         // Update the pinned IP addresses if new ones are checked.
 763         if (currentIpAddressesRadioButton.isChecked()) {
 764             // Update the database.
 765             domainsDatabaseHelper.updatePinnedIpAddresses(currentDomainDatabaseId, currentIpAddresses);
 766         }
 767     }
 768
 769     private void populateDomainsListView(final int highlightedDomainDatabaseId) {
 770         // get a handle for the current `domains_listview`.
 771         domainsListView = findViewById(R.id.domains_listview);
 772
 773         // Get a `Cursor` with the current contents of the domains database.
 774         Cursor domainsCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
 775
 776         // Setup `domainsCursorAdapter` with `this` context.  `false` disables `autoRequery`.
 777         CursorAdapter domainsCursorAdapter = new CursorAdapter(getApplicationContext(), domainsCursor, false) {
 778             @Override
 779             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 780                 // Inflate the individual item layout.  `false` does not attach it to the root.
 781                 return getLayoutInflater().inflate(R.layout.domain_name_linearlayout, parent, false);
 782             }
 783
 784             @Override
 785             public void bindView(View view, Context context, Cursor cursor) {
 786                 // Set the domain name.
 787                 String domainNameString = cursor.getString(cursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME));
 788                 TextView domainNameTextView = view.findViewById(R.id.domain_name_textview);
 789                 domainNameTextView.setText(domainNameString);
 790             }
 791         };
 792
 793         // Update the `ListView`.
 794         domainsListView.setAdapter(domainsCursorAdapter);
 795
 796         // Display the domain settings in the second pane if operating in two pane mode and the database contains at least one domain.
 797         if (DomainsActivity.twoPanedMode && (domainsCursor.getCount() > 0)) {  // Two-paned mode is enabled and there is at least one domain.
 798             // Initialize `highlightedDomainPosition`.
 799             int highlightedDomainPosition = 0;
 800
 801             // Get the cursor position for the highlighted domain.
 802             for (int i = 0; i < domainsCursor.getCount(); i++) {
 803                 // Move to position `i` in the cursor.
 804                 domainsCursor.moveToPosition(i);
 805
 806                 // Get the database ID for this position.
 807                 int currentDatabaseId = domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper._ID));
 808
 809                 // Set `highlightedDomainPosition` if the database ID for this matches `highlightedDomainDatabaseId`.
 810                 if (highlightedDomainDatabaseId == currentDatabaseId) {
 811                     highlightedDomainPosition = i;
 812                 }
 813             }
 814
 815             // Select the highlighted domain.
 816             domainsListView.setItemChecked(highlightedDomainPosition, true);
 817
 818             // Get the database ID for the highlighted domain.
 819             domainsCursor.moveToPosition(highlightedDomainPosition);
 820             currentDomainDatabaseId = domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper._ID));
 821
 822             // Store the database ID in the arguments bundle.
 823             Bundle argumentsBundle = new Bundle();
 824             argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, currentDomainDatabaseId);
 825
 826             // Add and arguments bundle to the domain settings fragment.
 827             DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 828             domainSettingsFragment.setArguments(argumentsBundle);
 829
 830             // Display the domain settings fragment.
 831             getSupportFragmentManager().beginTransaction().replace(R.id.domain_settings_fragment_container, domainSettingsFragment).commit();
 832
 833             // Enable the delete options menu items.
 834             deleteMenuItem.setEnabled(true);
 835
 836             // Get a handle for the shared preferences.
 837             SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 838
 839             // Get the theme and screenshot preferences.
 840             boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
 841
 842             // Set the delete icon according to the theme.
 843             if (darkTheme) {
 844                 deleteMenuItem.setIcon(R.drawable.delete_dark);
 845             } else {
 846                 deleteMenuItem.setIcon(R.drawable.delete_light);
 847             }
 848         } else if (twoPanedMode) {  // Two-paned mode is enabled but there are no domains.
 849             // Disable the options `MenuItems`.
 850             deleteMenuItem.setEnabled(false);
 851             deleteMenuItem.setIcon(R.drawable.delete_blue);
 852         }
 853     }
 854
 855     @Override
 856     public void dismissSnackbar() {
 857         // Dismiss the undo delete snackbar if it is shown.
 858         if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
 859             // Dismiss the snackbar.
 860             undoDeleteSnackbar.dismiss();
 861         }
 862     }
 863
 864     @Override
 865     public void onDestroy() {
 866         // Close the domains database helper.
 867         domainsDatabaseHelper.close();
 868
 869         // Run the default commands.
 870         super.onDestroy();
 871     }
 872 }