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

   1 /*
   2  * Copyright © 2017-2018 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.content.Context;
  23 import android.content.Intent;
  24 import android.database.Cursor;
  25 import android.net.http.SslCertificate;
  26 import android.os.Bundle;
  27 import android.os.Handler;
  28 import android.support.design.widget.FloatingActionButton;
  29 import android.support.design.widget.Snackbar;
  30 import android.support.v4.app.FragmentManager;
  31 import android.support.v4.app.NavUtils;
  32 import android.support.v7.app.ActionBar;
  33 import android.support.v7.app.AppCompatActivity;
  34 // `AppCompatDialogFragment` is required instead of `DialogFragment` or an error is produced on API <=22.
  35 import android.support.v7.app.AppCompatDialogFragment;
  36 import android.support.v7.widget.Toolbar;
  37 import android.view.Menu;
  38 import android.view.MenuItem;
  39 import android.view.View;
  40 import android.view.ViewGroup;
  41 import android.widget.CursorAdapter;
  42 import android.widget.EditText;
  43 import android.widget.ListView;
  44 import android.widget.RadioButton;
  45 import android.widget.Spinner;
  46 import android.widget.Switch;
  47 import android.widget.TextView;
  48
  49 import com.stoutner.privacybrowser.R;
  50 import com.stoutner.privacybrowser.dialogs.AddDomainDialog;
  51 import com.stoutner.privacybrowser.fragments.DomainSettingsFragment;
  52 import com.stoutner.privacybrowser.fragments.DomainsListFragment;
  53 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
  54
  55 public class DomainsActivity extends AppCompatActivity implements AddDomainDialog.AddDomainListener {
  56     // `twoPanedMode` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onCreate()`, `onCreateOptionsMenu()`, and `populateDomainsListView()`.
  57     public static boolean twoPanedMode;
  58
  59     // `databaseId` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onCreateOptionsMenu()`, `saveDomainSettings()` and `populateDomainsListView()`.
  60     public static int currentDomainDatabaseId;
  61
  62     // `deleteMenuItem` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onCreateOptionsMenu()`, `onOptionsItemSelected()`, and `onBackPressed()`.
  63     public static MenuItem deleteMenuItem;
  64
  65     // `undoDeleteSnackbar` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onOptionsItemSelected()` and `onBackPressed()`.
  66     public static Snackbar undoDeleteSnackbar;
  67
  68     // `dismissingSnackbar` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onOptionsItemSelected()`.
  69     public static boolean dismissingSnackbar;
  70
  71     // `context` is used in `onCreate()`, `onOptionsItemSelected()`, and `onAddDomain()`.
  72     private Context context;
  73
  74     // `supportFragmentManager` is used in `onCreate()` and `onCreateOptionsMenu()`.
  75     private FragmentManager supportFragmentManager;
  76
  77     // `domainsDatabaseHelper` is used in `onCreate()` and `saveDomainSettings()`.
  78     private static DomainsDatabaseHelper domainsDatabaseHelper;
  79
  80     // `domainsListView` is used in `onCreate()` and `populateDomainsList()`.
  81     private ListView domainsListView;
  82
  83     // `addDomainFAB` is used in `onCreate()`, `onCreateOptionsMenu()`, `onOptionsItemSelected()`, and `onBackPressed()`.
  84     private FloatingActionButton addDomainFAB;
  85
  86     // `deletedDomainPosition` is used in an inner and outer class in `onOptionsItemSelected()`.
  87     private int deletedDomainPosition;
  88
  89     // `restartAfterRotate` is used in `onCreate()` and `onCreateOptionsMenu()`.
  90     private boolean restartAfterRotate;
  91
  92     // `domainSettingsDisplayedBeforeRotate` is used in `onCreate()` and `onCreateOptionsMenu()`.
  93     private boolean domainSettingsDisplayedBeforeRotate;
  94
  95     // `domainSettingsDatabaseIdBeforeRotate` is used in `onCreate()` and `onCreateOptionsMenu()`.
  96     private int domainSettingsDatabaseIdBeforeRotate;
  97
  98     // `goDirectlyToDatabaseId` is used in `onCreate()` and `onCreateOptionsMenu()`.
  99     int goDirectlyToDatabaseId;
 100
 101     @Override
 102     protected void onCreate(Bundle savedInstanceState) {
 103         // Set the activity theme.
 104         if (MainWebViewActivity.darkTheme) {
 105             setTheme(R.style.PrivacyBrowserDark_SecondaryActivity);
 106         } else {
 107             setTheme(R.style.PrivacyBrowserLight_SecondaryActivity);
 108         }
 109
 110         // Run the default commands.
 111         super.onCreate(savedInstanceState);
 112
 113         // Extract the values from `savedInstanceState` if it is not `null`.
 114         if (savedInstanceState != null) {
 115             restartAfterRotate = true;
 116             domainSettingsDisplayedBeforeRotate = savedInstanceState.getBoolean("domainSettingsDisplayed");
 117             domainSettingsDatabaseIdBeforeRotate = savedInstanceState.getInt("domainSettingsDatabaseId");
 118         }
 119
 120         // Get the launching intent
 121         Intent intent = getIntent();
 122
 123         // Extract the domain to load if there is one.  `-1` is the default value.
 124         goDirectlyToDatabaseId = intent.getIntExtra("LoadDomain", -1);
 125
 126         // Set the content view.
 127         setContentView(R.layout.domains_coordinatorlayout);
 128
 129         // Get a handle for the context.
 130         context = this;
 131
 132         // Get a handle for the fragment manager.
 133         supportFragmentManager = getSupportFragmentManager();
 134
 135         // `SupportActionBar` from `android.support.v7.app.ActionBar` must be used until the minimum API is >= 21.
 136         final Toolbar domainsAppBar = findViewById(R.id.domains_toolbar);
 137         setSupportActionBar(domainsAppBar);
 138
 139         // Display the home arrow on `SupportActionBar`.
 140         ActionBar appBar = getSupportActionBar();
 141         assert appBar != null;// This assert removes the incorrect warning in Android Studio on the following line that `appBar` might be null.
 142         appBar.setDisplayHomeAsUpEnabled(true);
 143
 144         // Initialize the database handler.  The two `nulls` do not specify the database name or a `CursorFactory`.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
 145         domainsDatabaseHelper = new DomainsDatabaseHelper(context, null, null, 0);
 146
 147         // Determine if we are in two pane mode.  `domain_settings_fragment_container` does not exist on devices with a width less than 900dp.
 148         twoPanedMode = (findViewById(R.id.domain_settings_fragment_container) != null);
 149
 150         // Configure `addDomainFAB`.
 151         addDomainFAB = findViewById(R.id.add_domain_fab);
 152         addDomainFAB.setOnClickListener((View view) -> {
 153             // Show the add domain `AlertDialog`.
 154             AppCompatDialogFragment addDomainDialog = new AddDomainDialog();
 155             addDomainDialog.show(supportFragmentManager, getResources().getString(R.string.add_domain));
 156         });
 157     }
 158
 159     @Override
 160     public boolean onCreateOptionsMenu(Menu menu) {
 161         // Inflate the menu.
 162         getMenuInflater().inflate(R.menu.domains_options_menu, menu);
 163
 164         // Store `deleteMenuItem` for future use.
 165         deleteMenuItem = menu.findItem(R.id.delete_domain);
 166
 167         // Only display `deleteMenuItem` (initially) in two-paned mode.
 168         deleteMenuItem.setVisible(twoPanedMode);
 169
 170         // Display the fragments.  This must be done from `onCreateOptionsMenu()` instead of `onCreate()` because `populateDomainsListView()` needs `deleteMenuItem` to be inflated.
 171         if (restartAfterRotate && domainSettingsDisplayedBeforeRotate) {  // The device was rotated and domain settings were displayed previously.
 172             if (twoPanedMode) {  // The device is in two-paned mode.
 173                 // Reset `restartAfterRotate`.
 174                 restartAfterRotate = false;
 175
 176                 // Display `DomainsListFragment`.
 177                 DomainsListFragment domainsListFragment = new DomainsListFragment();
 178                 supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 179                 supportFragmentManager.executePendingTransactions();
 180
 181                 // Populate the list of domains.  `domainSettingsDatabaseId` highlights the domain that was highlighted before the rotation.
 182                 populateDomainsListView(domainSettingsDatabaseIdBeforeRotate);
 183             } else {  // The device is in single-paned mode.
 184                 // Reset `restartAfterRotate`.
 185                 restartAfterRotate = false;
 186
 187                 // Store the current domain database ID.
 188                 currentDomainDatabaseId = domainSettingsDatabaseIdBeforeRotate;
 189
 190                 // Add `currentDomainDatabaseId` to `argumentsBundle`.
 191                 Bundle argumentsBundle = new Bundle();
 192                 argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, currentDomainDatabaseId);
 193
 194                 // Add `argumentsBundle` to `domainSettingsFragment`.
 195                 DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 196                 domainSettingsFragment.setArguments(argumentsBundle);
 197
 198                 // Show `deleteMenuItem`.
 199                 deleteMenuItem.setVisible(true);
 200
 201                 // Hide `add_domain_fab`.
 202                 addDomainFAB.setVisibility(View.GONE);
 203
 204                 // Display `domainSettingsFragment`.
 205                 supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 206             }
 207         } else {  // The device was not rotated or, if it was, domain settings were not displayed previously.
 208             if (goDirectlyToDatabaseId >=0) {  // Load the indicated domain settings.
 209                 // Store the current domain database ID.
 210                 currentDomainDatabaseId = goDirectlyToDatabaseId;
 211
 212                 if (twoPanedMode) {  // The device is in two-paned mode.
 213                     // Display `DomainsListFragment`.
 214                     DomainsListFragment domainsListFragment = new DomainsListFragment();
 215                     supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 216                     supportFragmentManager.executePendingTransactions();
 217
 218                     // Populate the list of domains.  `domainSettingsDatabaseId` highlights the domain that was highlighted before the rotation.
 219                     populateDomainsListView(goDirectlyToDatabaseId);
 220                 } else {  // The device is in single-paned mode.
 221                     // Add the domain ID to be loaded to `argumentsBundle`.
 222                     Bundle argumentsBundle = new Bundle();
 223                     argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, goDirectlyToDatabaseId);
 224
 225                     // Add `argumentsBundle` to `domainSettingsFragment`.
 226                     DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 227                     domainSettingsFragment.setArguments(argumentsBundle);
 228
 229                     // Show `deleteMenuItem`.
 230                     deleteMenuItem.setVisible(true);
 231
 232                     // Hide `add_domain_fab`.
 233                     addDomainFAB.setVisibility(View.GONE);
 234
 235                     // Display `domainSettingsFragment`.
 236                     supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 237                 }
 238             } else {  // Highlight the first domain.
 239                 // Display `DomainsListFragment`.
 240                 DomainsListFragment domainsListFragment = new DomainsListFragment();
 241                 supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 242                 supportFragmentManager.executePendingTransactions();
 243
 244                 // Populate the list of domains.  `-1` highlights the first domain.
 245                 populateDomainsListView(-1);
 246             }
 247         }
 248
 249         // Success!
 250         return true;
 251     }
 252
 253     @Override
 254     public boolean onOptionsItemSelected(MenuItem menuItem) {
 255         // Get the ID of the `MenuItem` that was selected.
 256         int menuItemID = menuItem.getItemId();
 257
 258         switch (menuItemID) {
 259             case android.R.id.home:  // The home arrow is identified as `android.R.id.home`, not just `R.id.home`.
 260                 if (twoPanedMode) {  // The device is in two-paned mode.
 261                     // Save the current domain settings if the domain settings fragment is displayed.
 262                     if (findViewById(R.id.domain_settings_scrollview) != null) {
 263                         saveDomainSettings();
 264                     }
 265
 266                     // Dismiss the undo delete `SnackBar` if it is shown.
 267                     if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
 268                         undoDeleteSnackbar.dismiss();
 269
 270                         // Create a `Runnable` to return to the main activity.
 271                         Runnable navigateHomeRunnable = () -> {
 272                             // Go home.
 273                             NavUtils.navigateUpFromSameTask(this);
 274                         };
 275
 276                         // Navigate home after 300 milliseconds to make sure that the previous domain has been deleted from the database.
 277                         Handler handler = new Handler();
 278                         handler.postDelayed(navigateHomeRunnable, 300);
 279                     } else {
 280                         // Go home.
 281                         NavUtils.navigateUpFromSameTask(this);
 282                     }
 283                 } else if (findViewById(R.id.domain_settings_scrollview) != null) {  // The device is in single-paned mode and `DomainSettingsFragment` is displayed.
 284                     // Save the current domain settings.
 285                     saveDomainSettings();
 286
 287                     // Display `DomainsListFragment`.
 288                     DomainsListFragment domainsListFragment = new DomainsListFragment();
 289                     supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 290                     supportFragmentManager.executePendingTransactions();
 291
 292                     // Populate the list of domains.  `-1` highlights the first domain if in two-paned mode.  It has no effect in single-paned mode.
 293                     populateDomainsListView(-1);
 294
 295                     // Display `addDomainFAB`.
 296                     addDomainFAB.setVisibility(View.VISIBLE);
 297
 298                     // Hide `deleteMenuItem`.
 299                     deleteMenuItem.setVisible(false);
 300                 } else {  // The device is in single-paned mode and `DomainsListFragment` is displayed.
 301                     // Dismiss the undo delete `SnackBar` if it is shown.
 302                     if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
 303                         undoDeleteSnackbar.dismiss();
 304
 305                         // Create a `Runnable` to return to the main activity.
 306                         Runnable navigateHomeRunnable = () -> {
 307                             // Go home.
 308                             NavUtils.navigateUpFromSameTask(this);
 309                         };
 310
 311                         // Navigate home after 300 milliseconds to make sure that the previous domain has been deleted from the database.
 312                         Handler handler = new Handler();
 313                         handler.postDelayed(navigateHomeRunnable, 300);
 314                     } else {
 315                         // Go home.
 316                         NavUtils.navigateUpFromSameTask(this);
 317                     }
 318                 }
 319                 break;
 320
 321             case R.id.delete_domain:
 322                 // Store a copy of `currentDomainDatabaseId` because it could change while the `Snackbar` is displayed.
 323                 final int databaseIdToDelete = currentDomainDatabaseId;
 324
 325                 // Update the fragments and menu items.
 326                 if (twoPanedMode) {  // Two-paned mode.
 327                     // Store the deleted domain position, which is needed if `Undo` is selected in the `Snackbar`.
 328                     deletedDomainPosition = domainsListView.getCheckedItemPosition();
 329
 330                     // Disable the options `MenuItems`.
 331                     deleteMenuItem.setEnabled(false);
 332                     deleteMenuItem.setIcon(R.drawable.delete_blue);
 333
 334                     // Remove the domain settings fragment.
 335                     supportFragmentManager.beginTransaction().remove(supportFragmentManager.findFragmentById(R.id.domain_settings_fragment_container)).commit();
 336                 } else {  // Single-paned mode.
 337                     // Display `DomainsListFragment`.
 338                     DomainsListFragment domainsListFragment = new DomainsListFragment();
 339                     supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 340                     supportFragmentManager.executePendingTransactions();
 341
 342                     // Display `addDomainFAB`.
 343                     addDomainFAB.setVisibility(View.VISIBLE);
 344
 345                     // Hide `deleteMenuItem`.
 346                     deleteMenuItem.setVisible(false);
 347                 }
 348
 349                 // Get a `Cursor` that does not show the domain to be deleted.
 350                 Cursor domainsPendingDeleteCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomainExcept(databaseIdToDelete);
 351
 352                 // Setup `domainsPendingDeleteCursorAdapter` with `this` context.  `false` disables `autoRequery`.
 353                 CursorAdapter domainsPendingDeleteCursorAdapter = new CursorAdapter(this, domainsPendingDeleteCursor, false) {
 354                     @Override
 355                     public View newView(Context context, Cursor cursor, ViewGroup parent) {
 356                         // Inflate the individual item layout.  `false` does not attach it to the root.
 357                         return getLayoutInflater().inflate(R.layout.domain_name_linearlayout, parent, false);
 358                     }
 359
 360                     @Override
 361                     public void bindView(View view, Context context, Cursor cursor) {
 362                         // Set the domain name.
 363                         String domainNameString = cursor.getString(cursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME));
 364                         TextView domainNameTextView = view.findViewById(R.id.domain_name_textview);
 365                         domainNameTextView.setText(domainNameString);
 366                     }
 367                 };
 368
 369                 // Update the handle for the current `domains_listview`.
 370                 domainsListView = findViewById(R.id.domains_listview);
 371
 372                 // Update the `ListView`.
 373                 domainsListView.setAdapter(domainsPendingDeleteCursorAdapter);
 374
 375                 // Display a `Snackbar`.
 376                 undoDeleteSnackbar = Snackbar.make(domainsListView, R.string.domain_deleted, Snackbar.LENGTH_LONG)
 377                         .setAction(R.string.undo, (View v) -> {
 378                             // Do nothing because everything will be handled by `onDismissed()` below.
 379                         })
 380                         .addCallback(new Snackbar.Callback() {
 381                             @Override
 382                             public void onDismissed(Snackbar snackbar, int event) {
 383                                 switch (event) {
 384                                     // The user pushed the `Undo` button.
 385                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
 386                                         // Store `databaseId` in `argumentsBundle`.
 387                                         Bundle argumentsBundle = new Bundle();
 388                                         argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, databaseIdToDelete);
 389
 390                                         // Add `argumentsBundle` to `domainSettingsFragment`.
 391                                         DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 392                                         domainSettingsFragment.setArguments(argumentsBundle);
 393
 394                                         // Display the correct fragments.
 395                                         if (twoPanedMode) {  // The device in in two-paned mode.
 396                                             // Get a `Cursor` with the current contents of the domains database.
 397                                             Cursor undoDeleteDomainsCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
 398
 399                                             // Setup `domainsCursorAdapter` with `this` context.  `false` disables `autoRequery`.
 400                                             CursorAdapter undoDeleteDomainsCursorAdapter = new CursorAdapter(context, undoDeleteDomainsCursor, false) {
 401                                                 @Override
 402                                                 public View newView(Context context, Cursor cursor, ViewGroup parent) {
 403                                                     // Inflate the individual item layout.  `false` does not attach it to the root.
 404                                                     return getLayoutInflater().inflate(R.layout.domain_name_linearlayout, parent, false);
 405                                                 }
 406
 407                                                 @Override
 408                                                 public void bindView(View view, Context context, Cursor cursor) {
 409                                                     // Set the domain name.
 410                                                     String domainNameString = cursor.getString(cursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME));
 411                                                     TextView domainNameTextView = view.findViewById(R.id.domain_name_textview);
 412                                                     domainNameTextView.setText(domainNameString);
 413                                                 }
 414                                             };
 415
 416                                             // Update the `ListView`.
 417                                             domainsListView.setAdapter(undoDeleteDomainsCursorAdapter);
 418                                             // Select the previously deleted domain in `domainsListView`.
 419                                             domainsListView.setItemChecked(deletedDomainPosition, true);
 420
 421                                             // Display `domainSettingsFragment`.
 422                                             supportFragmentManager.beginTransaction().replace(R.id.domain_settings_fragment_container, domainSettingsFragment).commit();
 423
 424                                             // Enable the options `MenuItems`.
 425                                             deleteMenuItem.setEnabled(true);
 426                                             deleteMenuItem.setIcon(R.drawable.delete_light);
 427                                         } else {  // The device in in one-paned mode.
 428                                             // Display `domainSettingsFragment`.
 429                                             supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 430
 431                                             // Hide `add_domain_fab`.
 432                                             FloatingActionButton addDomainFAB = findViewById(R.id.add_domain_fab);
 433                                             addDomainFAB.setVisibility(View.GONE);
 434
 435                                             // Show and enable `deleteMenuItem`.
 436                                             deleteMenuItem.setVisible(true);
 437
 438                                             // Display `domainSettingsFragment`.
 439                                             supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 440                                         }
 441                                         break;
 442
 443                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
 444                                     default:
 445                                         // Delete the selected domain.
 446                                         domainsDatabaseHelper.deleteDomain(databaseIdToDelete);
 447
 448                                         // enable `deleteMenuItem` if the system was waiting for a `Snackbar` to be dismissed.
 449                                         if (dismissingSnackbar) {
 450                                             // Create a `Runnable` to enable the delete menu item.
 451                                             Runnable enableDeleteMenuItemRunnable = () -> {
 452                                                 // Enable `deleteMenuItem` according to the display mode.
 453                                                 if (twoPanedMode) {  // Two-paned mode.
 454                                                     // Enable `deleteMenuItem`.
 455                                                     deleteMenuItem.setEnabled(true);
 456
 457                                                     // Set the delete icon according to the theme.
 458                                                     if (MainWebViewActivity.darkTheme) {
 459                                                         deleteMenuItem.setIcon(R.drawable.delete_dark);
 460                                                     } else {
 461                                                         deleteMenuItem.setIcon(R.drawable.delete_light);
 462                                                     }
 463                                                 } else {  // Single-paned mode.
 464                                                     // Show `deleteMenuItem`.
 465                                                     deleteMenuItem.setVisible(true);
 466                                                 }
 467
 468                                                 // Reset `dismissingSnackbar`.
 469                                                 dismissingSnackbar = false;
 470                                             };
 471
 472                                             // Run `enableDeleteMenuItemRunnable` after 100 milliseconds to make sure that the previous domain has been deleted from the database.
 473                                             Handler handler = new Handler();
 474                                             handler.postDelayed(enableDeleteMenuItemRunnable, 100);
 475                                         }
 476                                         break;
 477                                 }
 478                             }
 479                         });
 480                 undoDeleteSnackbar.show();
 481                 break;
 482         }
 483
 484         // Consume the event.
 485         return true;
 486     }
 487
 488     @Override
 489     protected void onSaveInstanceState(Bundle outState) {
 490         // Store the current `DomainSettingsFragment` state in `outState`.
 491         if (findViewById(R.id.domain_settings_scrollview) != null) {  // `DomainSettingsFragment` is displayed.
 492             // Save any changes that have been made to the domain settings.
 493             saveDomainSettings();
 494
 495             // Store `DomainSettingsDisplayed`.
 496             outState.putBoolean("domainSettingsDisplayed", true);
 497             outState.putInt("domainSettingsDatabaseId", DomainSettingsFragment.databaseId);
 498         } else {  // `DomainSettingsFragment` is not displayed.
 499             outState.putBoolean("domainSettingsDisplayed", false);
 500             outState.putInt("domainSettingsDatabaseId", -1);
 501         }
 502
 503         super.onSaveInstanceState(outState);
 504     }
 505
 506     // Control what the navigation bar back button does.
 507     @Override
 508     public void onBackPressed() {
 509         if (twoPanedMode) {  // The device is in two-paned mode.
 510             // Save the current domain settings if the domain settings fragment is displayed.
 511             if (findViewById(R.id.domain_settings_scrollview) != null) {
 512                 saveDomainSettings();
 513             }
 514
 515             // Dismiss the undo delete SnackBar if it is shown.
 516             if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
 517                 undoDeleteSnackbar.dismiss();
 518
 519                 // Create a runnable to return to the main activity.
 520                 Runnable navigateHomeRunnable = super::onBackPressed;
 521
 522                 // Navigate home after 300 milliseconds to make sure that the previous domain has been deleted from the database.
 523                 Handler handler = new Handler();
 524                 handler.postDelayed(navigateHomeRunnable, 300);
 525             } else {
 526                 // Pass `onBackPressed()` to the system.
 527                 super.onBackPressed();
 528             }
 529         } else if (findViewById(R.id.domain_settings_scrollview) != null) {  // The device is in single-paned mode and `DomainSettingsFragment` is displayed.
 530             // Save the current domain settings.
 531             saveDomainSettings();
 532
 533             // Display the domains list fragment.
 534             DomainsListFragment domainsListFragment = new DomainsListFragment();
 535             supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 536             supportFragmentManager.executePendingTransactions();
 537
 538             // Populate the list of domains.  `-1` highlights the first domain if in two-paned mode.  It has no effect in single-paned mode.
 539             populateDomainsListView(-1);
 540
 541             // Display `addDomainFAB`.
 542             addDomainFAB.setVisibility(View.VISIBLE);
 543
 544             // Hide `deleteMenuItem`.
 545             deleteMenuItem.setVisible(false);
 546         } else {  // The device is in single-paned mode and `DomainsListFragment` is displayed.
 547             // Dismiss the undo delete `SnackBar` if it is shown.
 548             if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
 549                 undoDeleteSnackbar.dismiss();
 550
 551                 // Create a runnable to return to the main activity.
 552                 Runnable navigateHomeRunnable = super::onBackPressed;
 553
 554                 // Navigate home after 300 milliseconds to make sure that the previous domain has been deleted from the database.
 555                 Handler handler = new Handler();
 556                 handler.postDelayed(navigateHomeRunnable, 300);
 557             } else {
 558                 // Pass `onBackPressed()` to the system.
 559                 super.onBackPressed();
 560             }
 561         }
 562     }
 563
 564     @Override
 565     public void onAddDomain(AppCompatDialogFragment dialogFragment) {
 566         // Dismiss the undo delete snackbar if it is currently displayed.
 567         if ((undoDeleteSnackbar != null) && (undoDeleteSnackbar.isShown())) {
 568             undoDeleteSnackbar.dismiss();
 569         }
 570
 571         // Get the new domain name String from the dialog fragment.
 572         EditText domainNameEditText = dialogFragment.getDialog().findViewById(R.id.domain_name_edittext);
 573         String domainNameString = domainNameEditText.getText().toString();
 574
 575         // Create the domain and store the database ID in `currentDomainDatabaseId`.
 576         currentDomainDatabaseId = domainsDatabaseHelper.addDomain(domainNameString);
 577
 578         // Display the newly created domain.
 579         if (twoPanedMode) {  // The device in in two-paned mode.
 580             populateDomainsListView(currentDomainDatabaseId);
 581         } else {  // The device is in single-paned mode.
 582             // Hide `add_domain_fab`.
 583             addDomainFAB.setVisibility(View.GONE);
 584
 585             // Show and enable `deleteMenuItem`.
 586             DomainsActivity.deleteMenuItem.setVisible(true);
 587
 588             // Add `currentDomainDatabaseId` to `argumentsBundle`.
 589             Bundle argumentsBundle = new Bundle();
 590             argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, currentDomainDatabaseId);
 591
 592             // Add `argumentsBundle` to `domainSettingsFragment`.
 593             DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 594             domainSettingsFragment.setArguments(argumentsBundle);
 595
 596             // Display `domainSettingsFragment`.
 597             supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 598         }
 599     }
 600
 601     private void saveDomainSettings() {
 602         // Get handles for the domain settings.
 603         EditText domainNameEditText = findViewById(R.id.domain_settings_name_edittext);
 604         Switch javaScriptSwitch = findViewById(R.id.domain_settings_javascript_switch);
 605         Switch firstPartyCookiesSwitch = findViewById(R.id.domain_settings_first_party_cookies_switch);
 606         Switch thirdPartyCookiesSwitch = findViewById(R.id.domain_settings_third_party_cookies_switch);
 607         Switch domStorageSwitch = findViewById(R.id.domain_settings_dom_storage_switch);
 608         Switch formDataSwitch = findViewById(R.id.domain_settings_form_data_switch);
 609         Switch easyListSwitch = findViewById(R.id.domain_settings_easylist_switch);
 610         Switch easyPrivacySwitch = findViewById(R.id.domain_settings_easyprivacy_switch);
 611         Switch fanboysAnnoyanceSwitch = findViewById(R.id.domain_settings_fanboys_annoyance_list_switch);
 612         Switch fanboysSocialBlockingSwitch = findViewById(R.id.domain_settings_fanboys_social_blocking_list_switch);
 613         Spinner userAgentSpinner = findViewById(R.id.domain_settings_user_agent_spinner);
 614         EditText customUserAgentEditText = findViewById(R.id.domain_settings_custom_user_agent_edittext);
 615         Spinner fontSizeSpinner = findViewById(R.id.domain_settings_font_size_spinner);
 616         Spinner displayWebpageImagesSpinner = findViewById(R.id.domain_settings_display_webpage_images_spinner);
 617         Spinner nightModeSpinner = findViewById(R.id.domain_settings_night_mode_spinner);
 618         Switch pinnedSslCertificateSwitch = findViewById(R.id.domain_settings_pinned_ssl_certificate_switch);
 619         RadioButton savedSslCertificateRadioButton = findViewById(R.id.saved_ssl_certificate_radiobutton);
 620         RadioButton currentWebsiteCertificateRadioButton = findViewById(R.id.current_website_certificate_radiobutton);
 621
 622         // Extract the data for the domain settings.
 623         String domainNameString = domainNameEditText.getText().toString();
 624         boolean javaScriptEnabled = javaScriptSwitch.isChecked();
 625         boolean firstPartyCookiesEnabled = firstPartyCookiesSwitch.isChecked();
 626         boolean thirdPartyCookiesEnabled = thirdPartyCookiesSwitch.isChecked();
 627         boolean domStorageEnabled  = domStorageSwitch.isChecked();
 628         boolean formDataEnabled = formDataSwitch.isChecked();
 629         boolean easyListEnabled = easyListSwitch.isChecked();
 630         boolean easyPrivacyEnabled = easyPrivacySwitch.isChecked();
 631         boolean fanboysAnnoyanceEnabled = fanboysAnnoyanceSwitch.isChecked();
 632         boolean fanboysSocialBlockingEnabled = fanboysSocialBlockingSwitch.isChecked();
 633         int userAgentPositionInt = userAgentSpinner.getSelectedItemPosition();
 634         int fontSizePositionInt = fontSizeSpinner.getSelectedItemPosition();
 635         int displayWebpageImagesInt = displayWebpageImagesSpinner.getSelectedItemPosition();
 636         int nightModeInt = nightModeSpinner.getSelectedItemPosition();
 637         boolean pinnedSslCertificate = pinnedSslCertificateSwitch.isChecked();
 638
 639         // Get the data for the `Spinners` from the entry values string arrays.
 640         String userAgentString = getResources().getStringArray(R.array.domain_settings_user_agent_entry_values)[userAgentPositionInt];
 641         int fontSizeInt = Integer.parseInt(getResources().getStringArray(R.array.domain_settings_font_size_entry_values)[fontSizePositionInt]);
 642
 643         // Check to see if we are using a custom user agent.
 644         if (userAgentString.equals("Custom user agent")) {
 645             // Set `userAgentString` to the custom user agent string.
 646             userAgentString = customUserAgentEditText.getText().toString();
 647         }
 648
 649         // Save the domain settings.
 650         if (savedSslCertificateRadioButton.isChecked()) {  // The current certificate is being used.
 651             // Update the database except for the certificate.
 652             domainsDatabaseHelper.updateDomainExceptCertificate(DomainsActivity.currentDomainDatabaseId, domainNameString, javaScriptEnabled, firstPartyCookiesEnabled, thirdPartyCookiesEnabled,
 653                     domStorageEnabled, formDataEnabled, easyListEnabled, easyPrivacyEnabled, fanboysAnnoyanceEnabled, fanboysSocialBlockingEnabled, userAgentString, fontSizeInt, displayWebpageImagesInt,
 654                     nightModeInt, pinnedSslCertificate);
 655         } else if (currentWebsiteCertificateRadioButton.isChecked()) {  // The certificate is being updated with the current website certificate.
 656             // Get the current website SSL certificate.
 657             SslCertificate currentWebsiteSslCertificate = MainWebViewActivity.sslCertificate;
 658
 659             // Store the values from the SSL certificate.
 660             String issuedToCommonName = currentWebsiteSslCertificate.getIssuedTo().getCName();
 661             String issuedToOrganization = currentWebsiteSslCertificate.getIssuedTo().getOName();
 662             String issuedToOrganizationalUnit = currentWebsiteSslCertificate.getIssuedTo().getUName();
 663             String issuedByCommonName = currentWebsiteSslCertificate.getIssuedBy().getCName();
 664             String issuedByOrganization = currentWebsiteSslCertificate.getIssuedBy().getOName();
 665             String issuedByOrganizationalUnit = currentWebsiteSslCertificate.getIssuedBy().getUName();
 666             long startDateLong = currentWebsiteSslCertificate.getValidNotBeforeDate().getTime();
 667             long endDateLong = currentWebsiteSslCertificate.getValidNotAfterDate().getTime();
 668
 669             // Update the database.
 670             domainsDatabaseHelper.updateDomainWithCertificate(currentDomainDatabaseId, domainNameString, javaScriptEnabled, firstPartyCookiesEnabled, thirdPartyCookiesEnabled, domStorageEnabled,
 671                     formDataEnabled, easyListEnabled, easyPrivacyEnabled, fanboysAnnoyanceEnabled, fanboysSocialBlockingEnabled, userAgentString, fontSizeInt, displayWebpageImagesInt, nightModeInt,
 672                     pinnedSslCertificate, issuedToCommonName, issuedToOrganization, issuedToOrganizationalUnit, issuedByCommonName, issuedByOrganization, issuedByOrganizationalUnit, startDateLong, endDateLong);
 673
 674         } else {  // No certificate is selected.
 675             // Update the database, with PINNED_SSL_CERTIFICATE set to false.
 676             domainsDatabaseHelper.updateDomainExceptCertificate(currentDomainDatabaseId, domainNameString, javaScriptEnabled, firstPartyCookiesEnabled, thirdPartyCookiesEnabled, domStorageEnabled,
 677                     formDataEnabled, easyListEnabled, easyPrivacyEnabled, fanboysAnnoyanceEnabled, fanboysSocialBlockingEnabled, userAgentString, fontSizeInt, displayWebpageImagesInt, nightModeInt,
 678                     false);
 679         }
 680     }
 681
 682     private void populateDomainsListView(final int highlightedDomainDatabaseId) {
 683         // get a handle for the current `domains_listview`.
 684         domainsListView = findViewById(R.id.domains_listview);
 685
 686         // Get a `Cursor` with the current contents of the domains database.
 687         Cursor domainsCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
 688
 689         // Setup `domainsCursorAdapter` with `this` context.  `false` disables `autoRequery`.
 690         CursorAdapter domainsCursorAdapter = new CursorAdapter(context, domainsCursor, false) {
 691             @Override
 692             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 693                 // Inflate the individual item layout.  `false` does not attach it to the root.
 694                 return getLayoutInflater().inflate(R.layout.domain_name_linearlayout, parent, false);
 695             }
 696
 697             @Override
 698             public void bindView(View view, Context context, Cursor cursor) {
 699                 // Set the domain name.
 700                 String domainNameString = cursor.getString(cursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME));
 701                 TextView domainNameTextView = view.findViewById(R.id.domain_name_textview);
 702                 domainNameTextView.setText(domainNameString);
 703             }
 704         };
 705
 706         // Update the `ListView`.
 707         domainsListView.setAdapter(domainsCursorAdapter);
 708
 709         // Display the domain settings in the second pane if operating in two pane mode and the database contains at least one domain.
 710         if (DomainsActivity.twoPanedMode && (domainsCursor.getCount() > 0)) {  // Two-paned mode is enabled and there is at least one domain.
 711             // Initialize `highlightedDomainPosition`.
 712             int highlightedDomainPosition = 0;
 713
 714             // Get the cursor position for the highlighted domain.
 715             for (int i = 0; i < domainsCursor.getCount(); i++) {
 716                 // Move to position `i` in the cursor.
 717                 domainsCursor.moveToPosition(i);
 718
 719                 // Get the database ID for this position.
 720                 int currentDatabaseId = domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper._ID));
 721
 722                 // Set `highlightedDomainPosition` if the database ID for this matches `highlightedDomainDatabaseId`.
 723                 if (highlightedDomainDatabaseId == currentDatabaseId) {
 724                     highlightedDomainPosition = i;
 725                 }
 726             }
 727
 728             // Select the highlighted domain.
 729             domainsListView.setItemChecked(highlightedDomainPosition, true);
 730
 731             // Get the `databaseId` for the highlighted domain.
 732             domainsCursor.moveToPosition(highlightedDomainPosition);
 733             currentDomainDatabaseId = domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper._ID));
 734
 735             // Store `databaseId` in `argumentsBundle`.
 736             Bundle argumentsBundle = new Bundle();
 737             argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, currentDomainDatabaseId);
 738
 739             // Add `argumentsBundle` to `domainSettingsFragment`.
 740             DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 741             domainSettingsFragment.setArguments(argumentsBundle);
 742
 743             // Display `domainSettingsFragment`.
 744             supportFragmentManager.beginTransaction().replace(R.id.domain_settings_fragment_container, domainSettingsFragment).commit();
 745
 746             // Enable the options `MenuItems`.
 747             deleteMenuItem.setEnabled(true);
 748
 749             // Set the delete icon according to the theme.
 750             if (MainWebViewActivity.darkTheme) {
 751                 deleteMenuItem.setIcon(R.drawable.delete_dark);
 752             } else {
 753                 deleteMenuItem.setIcon(R.drawable.delete_light);
 754             }
 755         } else if (twoPanedMode) {  // Two-paned mode is enabled but there are no domains.
 756             // Disable the options `MenuItems`.
 757             deleteMenuItem.setEnabled(false);
 758             deleteMenuItem.setIcon(R.drawable.delete_blue);
 759         }
 760     }
 761 }