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.content.res.Resources;
  25 import android.database.Cursor;
  26 import android.net.http.SslCertificate;
  27 import android.os.Bundle;
  28 import android.os.Handler;
  29 import android.support.design.widget.FloatingActionButton;
  30 import android.support.design.widget.Snackbar;
  31 import android.support.v4.app.FragmentManager;
  32 import android.support.v4.app.NavUtils;
  33 import android.support.v7.app.ActionBar;
  34 import android.support.v7.app.AppCompatActivity;
  35 // `AppCompatDialogFragment` is required instead of `DialogFragment` or an error is produced on API <=22.
  36 import android.support.v7.app.AppCompatDialogFragment;
  37 import android.support.v7.widget.Toolbar;
  38 import android.view.Menu;
  39 import android.view.MenuItem;
  40 import android.view.View;
  41 import android.view.ViewGroup;
  42 import android.view.WindowManager;
  43 import android.widget.CursorAdapter;
  44 import android.widget.EditText;
  45 import android.widget.ListView;
  46 import android.widget.RadioButton;
  47 import android.widget.Spinner;
  48 import android.widget.Switch;
  49 import android.widget.TextView;
  50
  51 import com.stoutner.privacybrowser.R;
  52 import com.stoutner.privacybrowser.dialogs.AddDomainDialog;
  53 import com.stoutner.privacybrowser.fragments.DomainSettingsFragment;
  54 import com.stoutner.privacybrowser.fragments.DomainsListFragment;
  55 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
  56
  57 public class DomainsActivity extends AppCompatActivity implements AddDomainDialog.AddDomainListener {
  58     // `twoPanedMode` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onCreate()`, `onCreateOptionsMenu()`, and `populateDomainsListView()`.
  59     public static boolean twoPanedMode;
  60
  61     // `databaseId` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onCreateOptionsMenu()`, `saveDomainSettings()` and `populateDomainsListView()`.
  62     public static int currentDomainDatabaseId;
  63
  64     // `deleteMenuItem` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onCreateOptionsMenu()`, `onOptionsItemSelected()`, and `onBackPressed()`.
  65     public static MenuItem deleteMenuItem;
  66
  67     // `undoDeleteSnackbar` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onOptionsItemSelected()` and `onBackPressed()`.
  68     public static Snackbar undoDeleteSnackbar;
  69
  70     // `dismissingSnackbar` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onOptionsItemSelected()`.
  71     public static boolean dismissingSnackbar;
  72
  73     // `context` is used in `onCreate()`, `onOptionsItemSelected()`, and `onAddDomain()`.
  74     private Context context;
  75
  76     // `supportFragmentManager` is used in `onCreate()` and `onCreateOptionsMenu()`.
  77     private FragmentManager supportFragmentManager;
  78
  79     // `domainsDatabaseHelper` is used in `onCreate()` and `saveDomainSettings()`.
  80     private static DomainsDatabaseHelper domainsDatabaseHelper;
  81
  82     // `domainsListView` is used in `onCreate()` and `populateDomainsList()`.
  83     private ListView domainsListView;
  84
  85     // `addDomainFAB` is used in `onCreate()`, `onCreateOptionsMenu()`, `onOptionsItemSelected()`, and `onBackPressed()`.
  86     private FloatingActionButton addDomainFAB;
  87
  88     // `deletedDomainPosition` is used in an inner and outer class in `onOptionsItemSelected()`.
  89     private int deletedDomainPosition;
  90
  91     // `restartAfterRotate` is used in `onCreate()` and `onCreateOptionsMenu()`.
  92     private boolean restartAfterRotate;
  93
  94     // `domainSettingsDisplayedBeforeRotate` is used in `onCreate()` and `onCreateOptionsMenu()`.
  95     private boolean domainSettingsDisplayedBeforeRotate;
  96
  97     // `domainSettingsDatabaseIdBeforeRotate` is used in `onCreate()` and `onCreateOptionsMenu()`.
  98     private int domainSettingsDatabaseIdBeforeRotate;
  99
 100     // `goDirectlyToDatabaseId` is used in `onCreate()` and `onCreateOptionsMenu()`.
 101     private int goDirectlyToDatabaseId;
 102
 103     // `closeOnBack` is used in `onCreate()`, `onOptionsItemSelected()` and `onBackPressed()`.
 104     private boolean closeOnBack;
 105
 106     // `coordinatorLayout` is use in `onCreate()`, `onOptionsItemSelected()`, and `onSaveInstanceState()`.
 107     private View coordinatorLayout;
 108
 109     // `resources` is used in `onCreate()`, `onOptionsItemSelected()`, and `onSaveInstanceState()`.
 110     private Resources resources;
 111
 112     @Override
 113     protected void onCreate(Bundle savedInstanceState) {
 114         // Disable screenshots if not allowed.
 115         if (!MainWebViewActivity.allowScreenshots) {
 116             getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
 117         }
 118
 119         // Set the activity theme.
 120         if (MainWebViewActivity.darkTheme) {
 121             setTheme(R.style.PrivacyBrowserDark_SecondaryActivity);
 122         } else {
 123             setTheme(R.style.PrivacyBrowserLight_SecondaryActivity);
 124         }
 125
 126         // Run the default commands.
 127         super.onCreate(savedInstanceState);
 128
 129         // Extract the values from `savedInstanceState` if it is not `null`.
 130         if (savedInstanceState != null) {
 131             restartAfterRotate = true;
 132             domainSettingsDisplayedBeforeRotate = savedInstanceState.getBoolean("domainSettingsDisplayed");
 133             domainSettingsDatabaseIdBeforeRotate = savedInstanceState.getInt("domainSettingsDatabaseId");
 134         }
 135
 136         // Get the launching intent
 137         Intent intent = getIntent();
 138
 139         // Extract the domain to load if there is one.  `-1` is the default value.
 140         goDirectlyToDatabaseId = intent.getIntExtra("loadDomain", -1);
 141
 142         // Get the status of close-on-back, which is true when the domains activity is called from the options menu.
 143         closeOnBack = intent.getBooleanExtra("closeOnBack", false);
 144
 145         // Set the content view.
 146         setContentView(R.layout.domains_coordinatorlayout);
 147
 148         // Populate the class variables.
 149         coordinatorLayout = findViewById(R.id.domains_coordinatorlayout);
 150         resources = getResources();
 151         context = this;
 152         supportFragmentManager = getSupportFragmentManager();
 153
 154         // `SupportActionBar` from `android.support.v7.app.ActionBar` must be used until the minimum API is >= 21.
 155         final Toolbar domainsAppBar = findViewById(R.id.domains_toolbar);
 156         setSupportActionBar(domainsAppBar);
 157
 158         // Display the home arrow on `SupportActionBar`.
 159         ActionBar appBar = getSupportActionBar();
 160         assert appBar != null;// This assert removes the incorrect warning in Android Studio on the following line that `appBar` might be null.
 161         appBar.setDisplayHomeAsUpEnabled(true);
 162
 163         // 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`.
 164         domainsDatabaseHelper = new DomainsDatabaseHelper(context, null, null, 0);
 165
 166         // Determine if we are in two pane mode.  `domain_settings_fragment_container` does not exist on devices with a width less than 900dp.
 167         twoPanedMode = (findViewById(R.id.domain_settings_fragment_container) != null);
 168
 169         // Configure `addDomainFAB`.
 170         addDomainFAB = findViewById(R.id.add_domain_fab);
 171         addDomainFAB.setOnClickListener((View view) -> {
 172             // Show the add domain `AlertDialog`.
 173             AppCompatDialogFragment addDomainDialog = new AddDomainDialog();
 174             addDomainDialog.show(supportFragmentManager, resources.getString(R.string.add_domain));
 175         });
 176     }
 177
 178     @Override
 179     public boolean onCreateOptionsMenu(Menu menu) {
 180         // Inflate the menu.
 181         getMenuInflater().inflate(R.menu.domains_options_menu, menu);
 182
 183         // Store `deleteMenuItem` for future use.
 184         deleteMenuItem = menu.findItem(R.id.delete_domain);
 185
 186         // Only display `deleteMenuItem` (initially) in two-paned mode.
 187         deleteMenuItem.setVisible(twoPanedMode);
 188
 189         // Display the fragments.  This must be done from `onCreateOptionsMenu()` instead of `onCreate()` because `populateDomainsListView()` needs `deleteMenuItem` to be inflated.
 190         if (restartAfterRotate && domainSettingsDisplayedBeforeRotate) {  // The device was rotated and domain settings were displayed previously.
 191             if (twoPanedMode) {  // The device is in two-paned mode.
 192                 // Reset `restartAfterRotate`.
 193                 restartAfterRotate = false;
 194
 195                 // Display `DomainsListFragment`.
 196                 DomainsListFragment domainsListFragment = new DomainsListFragment();
 197                 supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 198                 supportFragmentManager.executePendingTransactions();
 199
 200                 // Populate the list of domains.  `domainSettingsDatabaseId` highlights the domain that was highlighted before the rotation.
 201                 populateDomainsListView(domainSettingsDatabaseIdBeforeRotate);
 202             } else {  // The device is in single-paned mode.
 203                 // Reset `restartAfterRotate`.
 204                 restartAfterRotate = false;
 205
 206                 // Store the current domain database ID.
 207                 currentDomainDatabaseId = domainSettingsDatabaseIdBeforeRotate;
 208
 209                 // Add `currentDomainDatabaseId` to `argumentsBundle`.
 210                 Bundle argumentsBundle = new Bundle();
 211                 argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, currentDomainDatabaseId);
 212
 213                 // Add `argumentsBundle` to `domainSettingsFragment`.
 214                 DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 215                 domainSettingsFragment.setArguments(argumentsBundle);
 216
 217                 // Show `deleteMenuItem`.
 218                 deleteMenuItem.setVisible(true);
 219
 220                 // Hide `add_domain_fab`.
 221                 addDomainFAB.setVisibility(View.GONE);
 222
 223                 // Display `domainSettingsFragment`.
 224                 supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 225             }
 226         } else {  // The device was not rotated or, if it was, domain settings were not displayed previously.
 227             if (goDirectlyToDatabaseId >=0) {  // Load the indicated domain settings.
 228                 // Store the current domain database ID.
 229                 currentDomainDatabaseId = goDirectlyToDatabaseId;
 230
 231                 if (twoPanedMode) {  // The device is in two-paned mode.
 232                     // Display `DomainsListFragment`.
 233                     DomainsListFragment domainsListFragment = new DomainsListFragment();
 234                     supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 235                     supportFragmentManager.executePendingTransactions();
 236
 237                     // Populate the list of domains.  `domainSettingsDatabaseId` highlights the domain that was highlighted before the rotation.
 238                     populateDomainsListView(goDirectlyToDatabaseId);
 239                 } else {  // The device is in single-paned mode.
 240                     // Add the domain ID to be loaded to `argumentsBundle`.
 241                     Bundle argumentsBundle = new Bundle();
 242                     argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, goDirectlyToDatabaseId);
 243
 244                     // Add `argumentsBundle` to `domainSettingsFragment`.
 245                     DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 246                     domainSettingsFragment.setArguments(argumentsBundle);
 247
 248                     // Show `deleteMenuItem`.
 249                     deleteMenuItem.setVisible(true);
 250
 251                     // Hide `add_domain_fab`.
 252                     addDomainFAB.setVisibility(View.GONE);
 253
 254                     // Display `domainSettingsFragment`.
 255                     supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 256                 }
 257             } else {  // Highlight the first domain.
 258                 // Display `DomainsListFragment`.
 259                 DomainsListFragment domainsListFragment = new DomainsListFragment();
 260                 supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 261                 supportFragmentManager.executePendingTransactions();
 262
 263                 // Populate the list of domains.  `-1` highlights the first domain.
 264                 populateDomainsListView(-1);
 265             }
 266         }
 267
 268         // Success!
 269         return true;
 270     }
 271
 272     @Override
 273     public boolean onOptionsItemSelected(MenuItem menuItem) {
 274         // Get the ID of the `MenuItem` that was selected.
 275         int menuItemID = menuItem.getItemId();
 276
 277         switch (menuItemID) {
 278             case android.R.id.home:  // The home arrow is identified as `android.R.id.home`, not just `R.id.home`.
 279                 if (twoPanedMode) {  // The device is in two-paned mode.
 280                     // Save the current domain settings if the domain settings fragment is displayed.
 281                     if (findViewById(R.id.domain_settings_scrollview) != null) {
 282                         saveDomainSettings(coordinatorLayout, resources);
 283                     }
 284
 285                     // Dismiss the undo delete `SnackBar` if it is shown.
 286                     if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
 287                         undoDeleteSnackbar.dismiss();
 288
 289                         // Create a `Runnable` to return to the main activity.
 290                         Runnable navigateHomeRunnable = () -> {
 291                             // Go home.
 292                             NavUtils.navigateUpFromSameTask(this);
 293                         };
 294
 295                         // Navigate home after 300 milliseconds to make sure that the previous domain has been deleted from the database.
 296                         Handler handler = new Handler();
 297                         handler.postDelayed(navigateHomeRunnable, 300);
 298                     } else {
 299                         // Go home.
 300                         NavUtils.navigateUpFromSameTask(this);
 301                     }
 302                 } else if (closeOnBack) {  // Go directly back to the main WebView activity because the domains activity was launched from the options menu.
 303                     // Save the current domain settings.
 304                     saveDomainSettings(coordinatorLayout, resources);
 305
 306                     // Go home.
 307                     NavUtils.navigateUpFromSameTask(this);
 308                 } else if (findViewById(R.id.domain_settings_scrollview) != null) {  // The device is in single-paned mode and the domain settings fragment is displayed.
 309                     // Save the current domain settings.
 310                     saveDomainSettings(coordinatorLayout, resources);
 311
 312                     // Display the domains list fragment.
 313                     DomainsListFragment domainsListFragment = new DomainsListFragment();
 314                     supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 315                     supportFragmentManager.executePendingTransactions();
 316
 317                     // Populate the list of domains.  `-1` highlights the first domain if in two-paned mode.  It has no effect in single-paned mode.
 318                     populateDomainsListView(-1);
 319
 320                     // Display the add domain FAB.
 321                     addDomainFAB.setVisibility(View.VISIBLE);
 322
 323                     // Hide the delete menu item.
 324                     deleteMenuItem.setVisible(false);
 325                 } else {  // The device is in single-paned mode and `DomainsListFragment` is displayed.
 326                     // Dismiss the undo delete `SnackBar` if it is shown.
 327                     if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
 328                         undoDeleteSnackbar.dismiss();
 329
 330                         // Create a `Runnable` to return to the main activity.
 331                         Runnable navigateHomeRunnable = () -> {
 332                             // Go home.
 333                             NavUtils.navigateUpFromSameTask(this);
 334                         };
 335
 336                         // Navigate home after 300 milliseconds to make sure that the previous domain has been deleted from the database.
 337                         Handler handler = new Handler();
 338                         handler.postDelayed(navigateHomeRunnable, 300);
 339                     } else {
 340                         // Go home.
 341                         NavUtils.navigateUpFromSameTask(this);
 342                     }
 343                 }
 344                 break;
 345
 346             case R.id.delete_domain:
 347                 // Reset close-on-back, which otherwise can cause errors if the system attempts to save settings for a domain that no longer exists.
 348                 closeOnBack = false;
 349
 350                 // Store a copy of `currentDomainDatabaseId` because it could change while the `Snackbar` is displayed.
 351                 final int databaseIdToDelete = currentDomainDatabaseId;
 352
 353                 // Update the fragments and menu items.
 354                 if (twoPanedMode) {  // Two-paned mode.
 355                     // Store the deleted domain position, which is needed if `Undo` is selected in the `Snackbar`.
 356                     deletedDomainPosition = domainsListView.getCheckedItemPosition();
 357
 358                     // Disable the options `MenuItems`.
 359                     deleteMenuItem.setEnabled(false);
 360                     deleteMenuItem.setIcon(R.drawable.delete_blue);
 361
 362                     // Remove the domain settings fragment.
 363                     supportFragmentManager.beginTransaction().remove(supportFragmentManager.findFragmentById(R.id.domain_settings_fragment_container)).commit();
 364                 } else {  // Single-paned mode.
 365                     // Display `DomainsListFragment`.
 366                     DomainsListFragment domainsListFragment = new DomainsListFragment();
 367                     supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 368                     supportFragmentManager.executePendingTransactions();
 369
 370                     // Display `addDomainFAB`.
 371                     addDomainFAB.setVisibility(View.VISIBLE);
 372
 373                     // Hide `deleteMenuItem`.
 374                     deleteMenuItem.setVisible(false);
 375                 }
 376
 377                 // Get a `Cursor` that does not show the domain to be deleted.
 378                 Cursor domainsPendingDeleteCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomainExcept(databaseIdToDelete);
 379
 380                 // Setup `domainsPendingDeleteCursorAdapter` with `this` context.  `false` disables `autoRequery`.
 381                 CursorAdapter domainsPendingDeleteCursorAdapter = new CursorAdapter(this, domainsPendingDeleteCursor, false) {
 382                     @Override
 383                     public View newView(Context context, Cursor cursor, ViewGroup parent) {
 384                         // Inflate the individual item layout.  `false` does not attach it to the root.
 385                         return getLayoutInflater().inflate(R.layout.domain_name_linearlayout, parent, false);
 386                     }
 387
 388                     @Override
 389                     public void bindView(View view, Context context, Cursor cursor) {
 390                         // Set the domain name.
 391                         String domainNameString = cursor.getString(cursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME));
 392                         TextView domainNameTextView = view.findViewById(R.id.domain_name_textview);
 393                         domainNameTextView.setText(domainNameString);
 394                     }
 395                 };
 396
 397                 // Update the handle for the current `domains_listview`.
 398                 domainsListView = findViewById(R.id.domains_listview);
 399
 400                 // Update the `ListView`.
 401                 domainsListView.setAdapter(domainsPendingDeleteCursorAdapter);
 402
 403                 // Display a `Snackbar`.
 404                 undoDeleteSnackbar = Snackbar.make(domainsListView, R.string.domain_deleted, Snackbar.LENGTH_LONG)
 405                         .setAction(R.string.undo, (View v) -> {
 406                             // Do nothing because everything will be handled by `onDismissed()` below.
 407                         })
 408                         .addCallback(new Snackbar.Callback() {
 409                             @Override
 410                             public void onDismissed(Snackbar snackbar, int event) {
 411                                 switch (event) {
 412                                     // The user pushed the `Undo` button.
 413                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
 414                                         // Store `databaseId` in `argumentsBundle`.
 415                                         Bundle argumentsBundle = new Bundle();
 416                                         argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, databaseIdToDelete);
 417
 418                                         // Add `argumentsBundle` to `domainSettingsFragment`.
 419                                         DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 420                                         domainSettingsFragment.setArguments(argumentsBundle);
 421
 422                                         // Display the correct fragments.
 423                                         if (twoPanedMode) {  // The device in in two-paned mode.
 424                                             // Get a `Cursor` with the current contents of the domains database.
 425                                             Cursor undoDeleteDomainsCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
 426
 427                                             // Setup `domainsCursorAdapter` with `this` context.  `false` disables `autoRequery`.
 428                                             CursorAdapter undoDeleteDomainsCursorAdapter = new CursorAdapter(context, undoDeleteDomainsCursor, false) {
 429                                                 @Override
 430                                                 public View newView(Context context, Cursor cursor, ViewGroup parent) {
 431                                                     // Inflate the individual item layout.  `false` does not attach it to the root.
 432                                                     return getLayoutInflater().inflate(R.layout.domain_name_linearlayout, parent, false);
 433                                                 }
 434
 435                                                 @Override
 436                                                 public void bindView(View view, Context context, Cursor cursor) {
 437                                                     // Set the domain name.
 438                                                     String domainNameString = cursor.getString(cursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME));
 439                                                     TextView domainNameTextView = view.findViewById(R.id.domain_name_textview);
 440                                                     domainNameTextView.setText(domainNameString);
 441                                                 }
 442                                             };
 443
 444                                             // Update the `ListView`.
 445                                             domainsListView.setAdapter(undoDeleteDomainsCursorAdapter);
 446                                             // Select the previously deleted domain in `domainsListView`.
 447                                             domainsListView.setItemChecked(deletedDomainPosition, true);
 448
 449                                             // Display `domainSettingsFragment`.
 450                                             supportFragmentManager.beginTransaction().replace(R.id.domain_settings_fragment_container, domainSettingsFragment).commit();
 451
 452                                             // Enable the options `MenuItems`.
 453                                             deleteMenuItem.setEnabled(true);
 454                                             deleteMenuItem.setIcon(R.drawable.delete_light);
 455                                         } else {  // The device in in one-paned mode.
 456                                             // Display `domainSettingsFragment`.
 457                                             supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 458
 459                                             // Hide `add_domain_fab`.
 460                                             FloatingActionButton addDomainFAB = findViewById(R.id.add_domain_fab);
 461                                             addDomainFAB.setVisibility(View.GONE);
 462
 463                                             // Show and enable `deleteMenuItem`.
 464                                             deleteMenuItem.setVisible(true);
 465
 466                                             // Display `domainSettingsFragment`.
 467                                             supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 468                                         }
 469                                         break;
 470
 471                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
 472                                     default:
 473                                         // Delete the selected domain.
 474                                         domainsDatabaseHelper.deleteDomain(databaseIdToDelete);
 475
 476                                         // enable `deleteMenuItem` if the system was waiting for a `Snackbar` to be dismissed.
 477                                         if (dismissingSnackbar) {
 478                                             // Create a `Runnable` to enable the delete menu item.
 479                                             Runnable enableDeleteMenuItemRunnable = () -> {
 480                                                 // Enable `deleteMenuItem` according to the display mode.
 481                                                 if (twoPanedMode) {  // Two-paned mode.
 482                                                     // Enable `deleteMenuItem`.
 483                                                     deleteMenuItem.setEnabled(true);
 484
 485                                                     // Set the delete icon according to the theme.
 486                                                     if (MainWebViewActivity.darkTheme) {
 487                                                         deleteMenuItem.setIcon(R.drawable.delete_dark);
 488                                                     } else {
 489                                                         deleteMenuItem.setIcon(R.drawable.delete_light);
 490                                                     }
 491                                                 } else {  // Single-paned mode.
 492                                                     // Show `deleteMenuItem`.
 493                                                     deleteMenuItem.setVisible(true);
 494                                                 }
 495
 496                                                 // Reset `dismissingSnackbar`.
 497                                                 dismissingSnackbar = false;
 498                                             };
 499
 500                                             // Run `enableDeleteMenuItemRunnable` after 100 milliseconds to make sure that the previous domain has been deleted from the database.
 501                                             Handler handler = new Handler();
 502                                             handler.postDelayed(enableDeleteMenuItemRunnable, 100);
 503                                         }
 504                                         break;
 505                                 }
 506                             }
 507                         });
 508                 undoDeleteSnackbar.show();
 509                 break;
 510         }
 511
 512         // Consume the event.
 513         return true;
 514     }
 515
 516     @Override
 517     protected void onSaveInstanceState(Bundle outState) {
 518         // Store the current `DomainSettingsFragment` state in `outState`.
 519         if (findViewById(R.id.domain_settings_scrollview) != null) {  // `DomainSettingsFragment` is displayed.
 520             // Save any changes that have been made to the domain settings.
 521             saveDomainSettings(coordinatorLayout, resources);
 522
 523             // Store `DomainSettingsDisplayed`.
 524             outState.putBoolean("domainSettingsDisplayed", true);
 525             outState.putInt("domainSettingsDatabaseId", DomainSettingsFragment.databaseId);
 526         } else {  // `DomainSettingsFragment` is not displayed.
 527             outState.putBoolean("domainSettingsDisplayed", false);
 528             outState.putInt("domainSettingsDatabaseId", -1);
 529         }
 530
 531         super.onSaveInstanceState(outState);
 532     }
 533
 534     // Control what the navigation bar back button does.
 535     @Override
 536     public void onBackPressed() {
 537         if (twoPanedMode) {  // The device is in two-paned mode.
 538             // Save the current domain settings if the domain settings fragment is displayed.
 539             if (findViewById(R.id.domain_settings_scrollview) != null) {
 540                 saveDomainSettings(coordinatorLayout, resources);
 541             }
 542
 543             // Dismiss the undo delete SnackBar if it is shown.
 544             if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
 545                 undoDeleteSnackbar.dismiss();
 546
 547                 // Create a runnable to return to the main activity.
 548                 Runnable navigateHomeRunnable = super::onBackPressed;
 549
 550                 // Navigate home after 300 milliseconds to make sure that the previous domain has been deleted from the database.
 551                 Handler handler = new Handler();
 552                 handler.postDelayed(navigateHomeRunnable, 300);
 553             } else {
 554                 // Pass `onBackPressed()` to the system.
 555                 super.onBackPressed();
 556             }
 557         } else if (closeOnBack) {  // Go directly back to the main WebView activity because the domains activity was launched from the options menu.
 558             // Save the current domain settings.
 559             saveDomainSettings(coordinatorLayout, resources);
 560
 561             // Pass `onBackPressed()` to the system.
 562             super.onBackPressed();
 563         } else if (findViewById(R.id.domain_settings_scrollview) != null) {  // The device is in single-paned mode and domain settings fragment is displayed.
 564             // Save the current domain settings.
 565             saveDomainSettings(coordinatorLayout, resources);
 566
 567             // Display the domains list fragment.
 568             DomainsListFragment domainsListFragment = new DomainsListFragment();
 569             supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
 570             supportFragmentManager.executePendingTransactions();
 571
 572             // Populate the list of domains.  `-1` highlights the first domain if in two-paned mode.  It has no effect in single-paned mode.
 573             populateDomainsListView(-1);
 574
 575             // Display the add domain FAB.
 576             addDomainFAB.setVisibility(View.VISIBLE);
 577
 578             // Hide the delete menu item.
 579             deleteMenuItem.setVisible(false);
 580         } else {  // The device is in single-paned mode and the domain list fragment is displayed.
 581             // Dismiss the undo delete SnackBar if it is shown.
 582             if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
 583                 undoDeleteSnackbar.dismiss();
 584
 585                 // Create a runnable to return to the main activity.
 586                 Runnable navigateHomeRunnable = super::onBackPressed;
 587
 588                 // Navigate home after 300 milliseconds to make sure that the previous domain has been deleted from the database.
 589                 Handler handler = new Handler();
 590                 handler.postDelayed(navigateHomeRunnable, 300);
 591             } else {
 592                 // Pass `onBackPressed()` to the system.
 593                 super.onBackPressed();
 594             }
 595         }
 596     }
 597
 598     @Override
 599     public void onAddDomain(AppCompatDialogFragment dialogFragment) {
 600         // Dismiss the undo delete snackbar if it is currently displayed.
 601         if ((undoDeleteSnackbar != null) && (undoDeleteSnackbar.isShown())) {
 602             undoDeleteSnackbar.dismiss();
 603         }
 604
 605         // Get the new domain name String from the dialog fragment.
 606         EditText domainNameEditText = dialogFragment.getDialog().findViewById(R.id.domain_name_edittext);
 607         String domainNameString = domainNameEditText.getText().toString();
 608
 609         // Create the domain and store the database ID in `currentDomainDatabaseId`.
 610         currentDomainDatabaseId = domainsDatabaseHelper.addDomain(domainNameString);
 611
 612         // Display the newly created domain.
 613         if (twoPanedMode) {  // The device in in two-paned mode.
 614             populateDomainsListView(currentDomainDatabaseId);
 615         } else {  // The device is in single-paned mode.
 616             // Hide `add_domain_fab`.
 617             addDomainFAB.setVisibility(View.GONE);
 618
 619             // Show and enable `deleteMenuItem`.
 620             DomainsActivity.deleteMenuItem.setVisible(true);
 621
 622             // Add `currentDomainDatabaseId` to `argumentsBundle`.
 623             Bundle argumentsBundle = new Bundle();
 624             argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, currentDomainDatabaseId);
 625
 626             // Add `argumentsBundle` to `domainSettingsFragment`.
 627             DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 628             domainSettingsFragment.setArguments(argumentsBundle);
 629
 630             // Display `domainSettingsFragment`.
 631             supportFragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
 632         }
 633     }
 634
 635     public void saveDomainSettings(View view, Resources resources) {
 636         // Get handles for the domain settings.
 637         EditText domainNameEditText = view.findViewById(R.id.domain_settings_name_edittext);
 638         Switch javaScriptSwitch = view.findViewById(R.id.domain_settings_javascript_switch);
 639         Switch firstPartyCookiesSwitch = view.findViewById(R.id.domain_settings_first_party_cookies_switch);
 640         Switch thirdPartyCookiesSwitch = view.findViewById(R.id.domain_settings_third_party_cookies_switch);
 641         Switch domStorageSwitch = view.findViewById(R.id.domain_settings_dom_storage_switch);
 642         Switch formDataSwitch = view.findViewById(R.id.domain_settings_form_data_switch);  // Form data can be removed once the minimum API >= 26.
 643         Switch easyListSwitch = view.findViewById(R.id.domain_settings_easylist_switch);
 644         Switch easyPrivacySwitch = view.findViewById(R.id.domain_settings_easyprivacy_switch);
 645         Switch fanboysAnnoyanceSwitch = view.findViewById(R.id.domain_settings_fanboys_annoyance_list_switch);
 646         Switch fanboysSocialBlockingSwitch = view.findViewById(R.id.domain_settings_fanboys_social_blocking_list_switch);
 647         Spinner userAgentSpinner = view.findViewById(R.id.domain_settings_user_agent_spinner);
 648         EditText customUserAgentEditText = view.findViewById(R.id.domain_settings_custom_user_agent_edittext);
 649         Spinner fontSizeSpinner = view.findViewById(R.id.domain_settings_font_size_spinner);
 650         Spinner swipeToRefreshSpinner = view.findViewById(R.id.domain_settings_swipe_to_refresh_spinner);
 651         Spinner displayWebpageImagesSpinner = view.findViewById(R.id.domain_settings_display_webpage_images_spinner);
 652         Spinner nightModeSpinner = view.findViewById(R.id.domain_settings_night_mode_spinner);
 653         Switch pinnedSslCertificateSwitch = view.findViewById(R.id.domain_settings_pinned_ssl_certificate_switch);
 654         RadioButton savedSslCertificateRadioButton = view.findViewById(R.id.saved_ssl_certificate_radiobutton);
 655         RadioButton currentWebsiteCertificateRadioButton = view.findViewById(R.id.current_website_certificate_radiobutton);
 656
 657         // Extract the data for the domain settings.
 658         String domainNameString = domainNameEditText.getText().toString();
 659         boolean javaScriptEnabled = javaScriptSwitch.isChecked();
 660         boolean firstPartyCookiesEnabled = firstPartyCookiesSwitch.isChecked();
 661         boolean thirdPartyCookiesEnabled = thirdPartyCookiesSwitch.isChecked();
 662         boolean domStorageEnabled  = domStorageSwitch.isChecked();
 663         boolean formDataEnabled = formDataSwitch.isChecked();  // Form data can be removed once the minimum API >= 26.
 664         boolean easyListEnabled = easyListSwitch.isChecked();
 665         boolean easyPrivacyEnabled = easyPrivacySwitch.isChecked();
 666         boolean fanboysAnnoyanceEnabled = fanboysAnnoyanceSwitch.isChecked();
 667         boolean fanboysSocialBlockingEnabled = fanboysSocialBlockingSwitch.isChecked();
 668         int userAgentPosition = userAgentSpinner.getSelectedItemPosition();
 669         int fontSizePosition = fontSizeSpinner.getSelectedItemPosition();
 670         int swipeToRefreshInt = swipeToRefreshSpinner.getSelectedItemPosition();
 671         int displayWebpageImagesInt = displayWebpageImagesSpinner.getSelectedItemPosition();
 672         int nightModeInt = nightModeSpinner.getSelectedItemPosition();
 673         boolean pinnedSslCertificate = pinnedSslCertificateSwitch.isChecked();
 674
 675         // Initialize the user agent name string.
 676         String userAgentName;
 677
 678         // Set the user agent name.
 679         switch (userAgentPosition) {
 680             case MainWebViewActivity.DOMAINS_SYSTEM_DEFAULT_USER_AGENT:
 681                 // Set the user agent name to be `System default user agent`.
 682                 userAgentName = resources.getString(R.string.system_default_user_agent);
 683                 break;
 684
 685             case MainWebViewActivity.DOMAINS_CUSTOM_USER_AGENT:
 686                 // Set the user agent name to be the custom user agent.
 687                 userAgentName = customUserAgentEditText.getText().toString();
 688                 break;
 689
 690             default:
 691                 // Get the array of user agent names.
 692                 String[] userAgentNameArray = resources.getStringArray(R.array.user_agent_names);
 693
 694                 // 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.
 695                 userAgentName = userAgentNameArray[userAgentPosition - 1];
 696         }
 697
 698         // Get the font size integer.
 699         int fontSizeInt = Integer.parseInt(resources.getStringArray(R.array.domain_settings_font_size_entry_values)[fontSizePosition]);
 700
 701         // Save the domain settings.
 702         if (savedSslCertificateRadioButton.isChecked()) {  // The current certificate is being used.
 703             // Update the database except for the certificate.
 704             domainsDatabaseHelper.updateDomainExceptCertificate(DomainsActivity.currentDomainDatabaseId, domainNameString, javaScriptEnabled, firstPartyCookiesEnabled, thirdPartyCookiesEnabled,
 705                     domStorageEnabled, formDataEnabled, easyListEnabled, easyPrivacyEnabled, fanboysAnnoyanceEnabled, fanboysSocialBlockingEnabled, userAgentName, fontSizeInt, swipeToRefreshInt, nightModeInt,
 706                     displayWebpageImagesInt, pinnedSslCertificate);
 707         } else if (currentWebsiteCertificateRadioButton.isChecked()) {  // The certificate is being updated with the current website certificate.
 708             // Get the current website SSL certificate.
 709             SslCertificate currentWebsiteSslCertificate = MainWebViewActivity.sslCertificate;
 710
 711             // Store the values from the SSL certificate.
 712             String issuedToCommonName = currentWebsiteSslCertificate.getIssuedTo().getCName();
 713             String issuedToOrganization = currentWebsiteSslCertificate.getIssuedTo().getOName();
 714             String issuedToOrganizationalUnit = currentWebsiteSslCertificate.getIssuedTo().getUName();
 715             String issuedByCommonName = currentWebsiteSslCertificate.getIssuedBy().getCName();
 716             String issuedByOrganization = currentWebsiteSslCertificate.getIssuedBy().getOName();
 717             String issuedByOrganizationalUnit = currentWebsiteSslCertificate.getIssuedBy().getUName();
 718             long startDateLong = currentWebsiteSslCertificate.getValidNotBeforeDate().getTime();
 719             long endDateLong = currentWebsiteSslCertificate.getValidNotAfterDate().getTime();
 720
 721             // Update the database.
 722             domainsDatabaseHelper.updateDomainWithCertificate(currentDomainDatabaseId, domainNameString, javaScriptEnabled, firstPartyCookiesEnabled, thirdPartyCookiesEnabled, domStorageEnabled,
 723                     formDataEnabled, easyListEnabled, easyPrivacyEnabled, fanboysAnnoyanceEnabled, fanboysSocialBlockingEnabled, userAgentName, fontSizeInt, swipeToRefreshInt,  nightModeInt,
 724                     displayWebpageImagesInt, pinnedSslCertificate, issuedToCommonName, issuedToOrganization, issuedToOrganizationalUnit, issuedByCommonName, issuedByOrganization, issuedByOrganizationalUnit,
 725                     startDateLong, endDateLong);
 726
 727         } else {  // No certificate is selected.
 728             // Update the database, with PINNED_SSL_CERTIFICATE set to false.
 729             domainsDatabaseHelper.updateDomainExceptCertificate(currentDomainDatabaseId, domainNameString, javaScriptEnabled, firstPartyCookiesEnabled, thirdPartyCookiesEnabled, domStorageEnabled,
 730                     formDataEnabled, easyListEnabled, easyPrivacyEnabled, fanboysAnnoyanceEnabled, fanboysSocialBlockingEnabled, userAgentName, fontSizeInt,  swipeToRefreshInt, nightModeInt,
 731                     displayWebpageImagesInt,false);
 732         }
 733     }
 734
 735     private void populateDomainsListView(final int highlightedDomainDatabaseId) {
 736         // get a handle for the current `domains_listview`.
 737         domainsListView = findViewById(R.id.domains_listview);
 738
 739         // Get a `Cursor` with the current contents of the domains database.
 740         Cursor domainsCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
 741
 742         // Setup `domainsCursorAdapter` with `this` context.  `false` disables `autoRequery`.
 743         CursorAdapter domainsCursorAdapter = new CursorAdapter(context, domainsCursor, false) {
 744             @Override
 745             public View newView(Context context, Cursor cursor, ViewGroup parent) {
 746                 // Inflate the individual item layout.  `false` does not attach it to the root.
 747                 return getLayoutInflater().inflate(R.layout.domain_name_linearlayout, parent, false);
 748             }
 749
 750             @Override
 751             public void bindView(View view, Context context, Cursor cursor) {
 752                 // Set the domain name.
 753                 String domainNameString = cursor.getString(cursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME));
 754                 TextView domainNameTextView = view.findViewById(R.id.domain_name_textview);
 755                 domainNameTextView.setText(domainNameString);
 756             }
 757         };
 758
 759         // Update the `ListView`.
 760         domainsListView.setAdapter(domainsCursorAdapter);
 761
 762         // Display the domain settings in the second pane if operating in two pane mode and the database contains at least one domain.
 763         if (DomainsActivity.twoPanedMode && (domainsCursor.getCount() > 0)) {  // Two-paned mode is enabled and there is at least one domain.
 764             // Initialize `highlightedDomainPosition`.
 765             int highlightedDomainPosition = 0;
 766
 767             // Get the cursor position for the highlighted domain.
 768             for (int i = 0; i < domainsCursor.getCount(); i++) {
 769                 // Move to position `i` in the cursor.
 770                 domainsCursor.moveToPosition(i);
 771
 772                 // Get the database ID for this position.
 773                 int currentDatabaseId = domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper._ID));
 774
 775                 // Set `highlightedDomainPosition` if the database ID for this matches `highlightedDomainDatabaseId`.
 776                 if (highlightedDomainDatabaseId == currentDatabaseId) {
 777                     highlightedDomainPosition = i;
 778                 }
 779             }
 780
 781             // Select the highlighted domain.
 782             domainsListView.setItemChecked(highlightedDomainPosition, true);
 783
 784             // Get the `databaseId` for the highlighted domain.
 785             domainsCursor.moveToPosition(highlightedDomainPosition);
 786             currentDomainDatabaseId = domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper._ID));
 787
 788             // Store `databaseId` in `argumentsBundle`.
 789             Bundle argumentsBundle = new Bundle();
 790             argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, currentDomainDatabaseId);
 791
 792             // Add `argumentsBundle` to `domainSettingsFragment`.
 793             DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
 794             domainSettingsFragment.setArguments(argumentsBundle);
 795
 796             // Display `domainSettingsFragment`.
 797             supportFragmentManager.beginTransaction().replace(R.id.domain_settings_fragment_container, domainSettingsFragment).commit();
 798
 799             // Enable the options `MenuItems`.
 800             deleteMenuItem.setEnabled(true);
 801
 802             // Set the delete icon according to the theme.
 803             if (MainWebViewActivity.darkTheme) {
 804                 deleteMenuItem.setIcon(R.drawable.delete_dark);
 805             } else {
 806                 deleteMenuItem.setIcon(R.drawable.delete_light);
 807             }
 808         } else if (twoPanedMode) {  // Two-paned mode is enabled but there are no domains.
 809             // Disable the options `MenuItems`.
 810             deleteMenuItem.setEnabled(false);
 811             deleteMenuItem.setIcon(R.drawable.delete_blue);
 812         }
 813     }
 814 }