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

   1 /*
   2  * Copyright © 2015-2021 Soren Stoutner <soren@stoutner.com>.
   3  *
   4  * Download cookie code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
   5  *
   6  * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
   7  *
   8  * Privacy Browser is free software: you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation, either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * Privacy Browser is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 package com.stoutner.privacybrowser.activities;
  23
  24 import android.annotation.SuppressLint;
  25 import android.app.Activity;
  26 import android.app.Dialog;
  27 import android.app.DownloadManager;
  28 import android.app.SearchManager;
  29 import android.content.ActivityNotFoundException;
  30 import android.content.BroadcastReceiver;
  31 import android.content.ClipData;
  32 import android.content.ClipboardManager;
  33 import android.content.Context;
  34 import android.content.Intent;
  35 import android.content.IntentFilter;
  36 import android.content.SharedPreferences;
  37 import android.content.pm.PackageManager;
  38 import android.content.res.Configuration;
  39 import android.database.Cursor;
  40 import android.graphics.Bitmap;
  41 import android.graphics.BitmapFactory;
  42 import android.graphics.Typeface;
  43 import android.graphics.drawable.BitmapDrawable;
  44 import android.graphics.drawable.Drawable;
  45 import android.net.Uri;
  46 import android.net.http.SslCertificate;
  47 import android.net.http.SslError;
  48 import android.os.AsyncTask;
  49 import android.os.Build;
  50 import android.os.Bundle;
  51 import android.os.Environment;
  52 import android.os.Handler;
  53 import android.os.Message;
  54 import android.preference.PreferenceManager;
  55 import android.print.PrintDocumentAdapter;
  56 import android.print.PrintManager;
  57 import android.provider.DocumentsContract;
  58 import android.text.Editable;
  59 import android.text.Spanned;
  60 import android.text.TextWatcher;
  61 import android.text.style.ForegroundColorSpan;
  62 import android.util.Patterns;
  63 import android.util.TypedValue;
  64 import android.view.ContextMenu;
  65 import android.view.GestureDetector;
  66 import android.view.KeyEvent;
  67 import android.view.Menu;
  68 import android.view.MenuItem;
  69 import android.view.MotionEvent;
  70 import android.view.View;
  71 import android.view.ViewGroup;
  72 import android.view.WindowManager;
  73 import android.view.inputmethod.InputMethodManager;
  74 import android.webkit.CookieManager;
  75 import android.webkit.HttpAuthHandler;
  76 import android.webkit.SslErrorHandler;
  77 import android.webkit.ValueCallback;
  78 import android.webkit.WebBackForwardList;
  79 import android.webkit.WebChromeClient;
  80 import android.webkit.WebResourceResponse;
  81 import android.webkit.WebSettings;
  82 import android.webkit.WebStorage;
  83 import android.webkit.WebView;
  84 import android.webkit.WebViewClient;
  85 import android.webkit.WebViewDatabase;
  86 import android.widget.ArrayAdapter;
  87 import android.widget.CheckBox;
  88 import android.widget.CursorAdapter;
  89 import android.widget.EditText;
  90 import android.widget.FrameLayout;
  91 import android.widget.ImageView;
  92 import android.widget.LinearLayout;
  93 import android.widget.ListView;
  94 import android.widget.ProgressBar;
  95 import android.widget.RadioButton;
  96 import android.widget.RelativeLayout;
  97 import android.widget.TextView;
  98
  99 import androidx.annotation.NonNull;
 100 import androidx.appcompat.app.ActionBar;
 101 import androidx.appcompat.app.ActionBarDrawerToggle;
 102 import androidx.appcompat.app.AppCompatActivity;
 103 import androidx.appcompat.app.AppCompatDelegate;
 104 import androidx.appcompat.widget.Toolbar;
 105 import androidx.coordinatorlayout.widget.CoordinatorLayout;
 106 import androidx.core.content.res.ResourcesCompat;
 107 import androidx.core.view.GravityCompat;
 108 import androidx.drawerlayout.widget.DrawerLayout;
 109 import androidx.fragment.app.DialogFragment;
 110 import androidx.fragment.app.Fragment;
 111 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
 112 import androidx.viewpager.widget.ViewPager;
 113 import androidx.webkit.WebSettingsCompat;
 114 import androidx.webkit.WebViewFeature;
 115
 116 import com.google.android.material.appbar.AppBarLayout;
 117 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 118 import com.google.android.material.navigation.NavigationView;
 119 import com.google.android.material.snackbar.Snackbar;
 120 import com.google.android.material.tabs.TabLayout;
 121
 122 import com.stoutner.privacybrowser.BuildConfig;
 123 import com.stoutner.privacybrowser.R;
 124 import com.stoutner.privacybrowser.adapters.WebViewPagerAdapter;
 125 import com.stoutner.privacybrowser.asynctasks.GetHostIpAddresses;
 126 import com.stoutner.privacybrowser.asynctasks.PopulateBlocklists;
 127 import com.stoutner.privacybrowser.asynctasks.PrepareSaveDialog;
 128 import com.stoutner.privacybrowser.asynctasks.SaveUrl;
 129 import com.stoutner.privacybrowser.asynctasks.SaveWebpageImage;
 130 import com.stoutner.privacybrowser.definitions.PendingDialog;
 131 import com.stoutner.privacybrowser.dialogs.AdConsentDialog;
 132 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
 133 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
 134 import com.stoutner.privacybrowser.dialogs.CreateHomeScreenShortcutDialog;
 135 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
 136 import com.stoutner.privacybrowser.dialogs.FontSizeDialog;
 137 import com.stoutner.privacybrowser.dialogs.HttpAuthenticationDialog;
 138 import com.stoutner.privacybrowser.dialogs.OpenDialog;
 139 import com.stoutner.privacybrowser.dialogs.ProxyNotInstalledDialog;
 140 import com.stoutner.privacybrowser.dialogs.PinnedMismatchDialog;
 141 import com.stoutner.privacybrowser.dialogs.SaveWebpageDialog;
 142 import com.stoutner.privacybrowser.dialogs.SslCertificateErrorDialog;
 143 import com.stoutner.privacybrowser.dialogs.UrlHistoryDialog;
 144 import com.stoutner.privacybrowser.dialogs.ViewSslCertificateDialog;
 145 import com.stoutner.privacybrowser.dialogs.WaitingForProxyDialog;
 146 import com.stoutner.privacybrowser.fragments.WebViewTabFragment;
 147 import com.stoutner.privacybrowser.helpers.AdHelper;
 148 import com.stoutner.privacybrowser.helpers.BlocklistHelper;
 149 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
 150 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
 151 import com.stoutner.privacybrowser.helpers.ProxyHelper;
 152 import com.stoutner.privacybrowser.views.NestedScrollWebView;
 153
 154 import java.io.ByteArrayInputStream;
 155 import java.io.ByteArrayOutputStream;
 156 import java.io.File;
 157 import java.io.FileInputStream;
 158 import java.io.FileOutputStream;
 159 import java.io.IOException;
 160 import java.io.InputStream;
 161 import java.io.OutputStream;
 162 import java.io.UnsupportedEncodingException;
 163
 164 import java.net.MalformedURLException;
 165 import java.net.URL;
 166 import java.net.URLDecoder;
 167 import java.net.URLEncoder;
 168
 169 import java.text.NumberFormat;
 170
 171 import java.util.ArrayList;
 172 import java.util.Calendar;
 173 import java.util.Date;
 174 import java.util.HashMap;
 175 import java.util.HashSet;
 176 import java.util.List;
 177 import java.util.Map;
 178 import java.util.Objects;
 179 import java.util.Set;
 180 import java.util.concurrent.ExecutorService;
 181 import java.util.concurrent.Executors;
 182
 183 public class MainWebViewActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener,
 184         EditBookmarkFolderDialog.EditBookmarkFolderListener, FontSizeDialog.UpdateFontSizeListener, NavigationView.OnNavigationItemSelectedListener, OpenDialog.OpenListener,
 185         PinnedMismatchDialog.PinnedMismatchListener, PopulateBlocklists.PopulateBlocklistsListener, SaveWebpageDialog.SaveWebpageListener, UrlHistoryDialog.NavigateHistoryListener,
 186         WebViewTabFragment.NewTabListener {
 187
 188     // The executor service handles background tasks.  It is accessed from `ViewSourceActivity`.
 189     public static ExecutorService executorService = Executors.newFixedThreadPool(4);
 190
 191     // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()`, `onResume()`, and `applyProxy()`.
 192     public static String orbotStatus = "unknown";
 193
 194     // The WebView pager adapter is accessed from `HttpAuthenticationDialog`, `PinnedMismatchDialog`, and `SslCertificateErrorDialog`.  It is also used in `onCreate()`, `onResume()`, and `addTab()`.
 195     public static WebViewPagerAdapter webViewPagerAdapter;
 196
 197     // `restartFromBookmarksActivity` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onRestart()`.
 198     public static boolean restartFromBookmarksActivity;
 199
 200     // Define the public static variables.
 201     public static ArrayList<PendingDialog> pendingDialogsArrayList =  new ArrayList<>();
 202
 203     // `currentBookmarksFolder` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onCreate()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`,
 204     // `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
 205     public static String currentBookmarksFolder;
 206
 207     // The user agent constants are public static so they can be accessed from `SettingsFragment`, `DomainsActivity`, and `DomainSettingsFragment`.
 208     public final static int UNRECOGNIZED_USER_AGENT = -1;
 209     public final static int SETTINGS_WEBVIEW_DEFAULT_USER_AGENT = 1;
 210     public final static int SETTINGS_CUSTOM_USER_AGENT = 12;
 211     public final static int DOMAINS_SYSTEM_DEFAULT_USER_AGENT = 0;
 212     public final static int DOMAINS_WEBVIEW_DEFAULT_USER_AGENT = 2;
 213     public final static int DOMAINS_CUSTOM_USER_AGENT = 13;
 214
 215     // Define the start activity for result request codes.  The public static entries are accessed from `OpenDialog()` and `SaveWebpageDialog()`.
 216     private final int BROWSE_FILE_UPLOAD_REQUEST_CODE = 0;
 217     public final static int BROWSE_OPEN_REQUEST_CODE = 1;
 218     public final static int BROWSE_SAVE_WEBPAGE_REQUEST_CODE = 2;
 219
 220     // The proxy mode is public static so it can be accessed from `ProxyHelper()`.
 221     // It is also used in `onRestart()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `applyAppSettings()`, and `applyProxy()`.
 222     // It will be updated in `applyAppSettings()`, but it needs to be initialized here or the first run of `onPrepareOptionsMenu()` crashes.
 223     public static String proxyMode = ProxyHelper.NONE;
 224
 225     // Define the saved instance state constants.
 226     private final String SAVED_STATE_ARRAY_LIST = "saved_state_array_list";
 227     private final String SAVED_NESTED_SCROLL_WEBVIEW_STATE_ARRAY_LIST = "saved_nested_scroll_webview_state_array_list";
 228     private final String SAVED_TAB_POSITION = "saved_tab_position";
 229     private final String PROXY_MODE = "proxy_mode";
 230
 231     // Define the saved instance state variables.
 232     private ArrayList<Bundle> savedStateArrayList;
 233     private ArrayList<Bundle> savedNestedScrollWebViewStateArrayList;
 234     private int savedTabPosition;
 235     private String savedProxyMode;
 236
 237     // Define the class variables.
 238     @SuppressWarnings("rawtypes")
 239     AsyncTask populateBlocklists;
 240
 241     // The current WebView is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`,
 242     // `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`, `onSslMismatchBack()`, `applyProxy()`, and `applyDomainSettings()`.
 243     private NestedScrollWebView currentWebView;
 244
 245     // `customHeader` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateContextMenu()`, and `loadUrl()`.
 246     private final Map<String, String> customHeaders = new HashMap<>();
 247
 248     // The search URL is set in `applyAppSettings()` and used in `onNewIntent()`, `loadUrlFromTextBox()`, `initializeApp()`, and `initializeWebView()`.
 249     private String searchURL;
 250
 251     // The blocklists are populated in `finishedPopulatingBlocklists()` and accessed from `initializeWebView()`.
 252     private ArrayList<List<String[]>> easyList;
 253     private ArrayList<List<String[]>> easyPrivacy;
 254     private ArrayList<List<String[]>> fanboysAnnoyanceList;
 255     private ArrayList<List<String[]>> fanboysSocialList;
 256     private ArrayList<List<String[]>> ultraList;
 257     private ArrayList<List<String[]>> ultraPrivacy;
 258
 259     // The action bar drawer toggle is initialized in `onCreate()` and used in `onResume()`.
 260     private ActionBarDrawerToggle actionBarDrawerToggle;
 261
 262     // The color spans are used in `onCreate()` and `highlightUrlText()`.
 263     private ForegroundColorSpan redColorSpan;
 264     private ForegroundColorSpan initialGrayColorSpan;
 265     private ForegroundColorSpan finalGrayColorSpan;
 266
 267     // `bookmarksDatabaseHelper` is used in `onCreate()`, `onDestroy`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`,
 268     // and `loadBookmarksFolder()`.
 269     private BookmarksDatabaseHelper bookmarksDatabaseHelper;
 270
 271     // `bookmarksCursor` is used in `onDestroy()`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
 272     private Cursor bookmarksCursor;
 273
 274     // `bookmarksCursorAdapter` is used in `onCreateBookmark()`, `onCreateBookmarkFolder()` `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
 275     private CursorAdapter bookmarksCursorAdapter;
 276
 277     // `oldFolderNameString` is used in `onCreate()` and `onSaveEditBookmarkFolder()`.
 278     private String oldFolderNameString;
 279
 280     // `fileChooserCallback` is used in `onCreate()` and `onActivityResult()`.
 281     private ValueCallback<Uri[]> fileChooserCallback;
 282
 283     // The default progress view offsets are set in `onCreate()` and used in `initializeWebView()`.
 284     private int appBarHeight;
 285     private int defaultProgressViewStartOffset;
 286     private int defaultProgressViewEndOffset;
 287
 288     // The URL sanitizers are set in `applyAppSettings()` and used in `sanitizeUrl()`.
 289     private boolean sanitizeGoogleAnalytics;
 290     private boolean sanitizeFacebookClickIds;
 291     private boolean sanitizeTwitterAmpRedirects;
 292
 293     // Declare the class variables
 294     private BroadcastReceiver orbotStatusBroadcastReceiver;
 295     private String webViewDefaultUserAgent;
 296     private boolean incognitoModeEnabled;
 297     private boolean fullScreenBrowsingModeEnabled;
 298     private boolean inFullScreenBrowsingMode;
 299     private boolean downloadWithExternalApp;
 300     private boolean hideAppBar;
 301     private boolean scrollAppBar;
 302     private boolean bottomAppBar;
 303     private boolean loadingNewIntent;
 304     private boolean reapplyDomainSettingsOnRestart;
 305     private boolean reapplyAppSettingsOnRestart;
 306     private boolean displayingFullScreenVideo;
 307     private boolean waitingForProxy;
 308
 309     // Define the class variables.
 310     private long lastScrollUpdate = 0;
 311
 312     // Declare the class views.
 313     private FrameLayout rootFrameLayout;
 314     private DrawerLayout drawerLayout;
 315     private RelativeLayout mainContentRelativeLayout;
 316     private AppBarLayout appBarLayout;
 317     private Toolbar toolbar;
 318     private RelativeLayout urlRelativeLayout;
 319     private EditText urlEditText;
 320     private ActionBar actionBar;
 321     private LinearLayout findOnPageLinearLayout;
 322     private LinearLayout tabsLinearLayout;
 323     private TabLayout tabLayout;
 324     private SwipeRefreshLayout swipeRefreshLayout;
 325     private ViewPager webViewPager;
 326     private FrameLayout fullScreenVideoFrameLayout;
 327
 328     // Declare the class menus.
 329     private Menu optionsMenu;
 330
 331     // Declare the class menu items.
 332     private MenuItem navigationBackMenuItem;
 333     private MenuItem navigationForwardMenuItem;
 334     private MenuItem navigationHistoryMenuItem;
 335     private MenuItem navigationRequestsMenuItem;
 336     private MenuItem optionsPrivacyMenuItem;
 337     private MenuItem optionsRefreshMenuItem;
 338     private MenuItem optionsCookiesMenuItem;
 339     private MenuItem optionsDomStorageMenuItem;
 340     private MenuItem optionsSaveFormDataMenuItem;
 341     private MenuItem optionsClearDataMenuItem;
 342     private MenuItem optionsClearCookiesMenuItem;
 343     private MenuItem optionsClearDomStorageMenuItem;
 344     private MenuItem optionsClearFormDataMenuItem;
 345     private MenuItem optionsBlocklistsMenuItem;
 346     private MenuItem optionsEasyListMenuItem;
 347     private MenuItem optionsEasyPrivacyMenuItem;
 348     private MenuItem optionsFanboysAnnoyanceListMenuItem;
 349     private MenuItem optionsFanboysSocialBlockingListMenuItem;
 350     private MenuItem optionsUltraListMenuItem;
 351     private MenuItem optionsUltraPrivacyMenuItem;
 352     private MenuItem optionsBlockAllThirdPartyRequestsMenuItem;
 353     private MenuItem optionsProxyMenuItem;
 354     private MenuItem optionsProxyNoneMenuItem;
 355     private MenuItem optionsProxyTorMenuItem;
 356     private MenuItem optionsProxyI2pMenuItem;
 357     private MenuItem optionsProxyCustomMenuItem;
 358     private MenuItem optionsUserAgentMenuItem;
 359     private MenuItem optionsUserAgentPrivacyBrowserMenuItem;
 360     private MenuItem optionsUserAgentWebViewDefaultMenuItem;
 361     private MenuItem optionsUserAgentFirefoxOnAndroidMenuItem;
 362     private MenuItem optionsUserAgentChromeOnAndroidMenuItem;
 363     private MenuItem optionsUserAgentSafariOnIosMenuItem;
 364     private MenuItem optionsUserAgentFirefoxOnLinuxMenuItem;
 365     private MenuItem optionsUserAgentChromiumOnLinuxMenuItem;
 366     private MenuItem optionsUserAgentFirefoxOnWindowsMenuItem;
 367     private MenuItem optionsUserAgentChromeOnWindowsMenuItem;
 368     private MenuItem optionsUserAgentEdgeOnWindowsMenuItem;
 369     private MenuItem optionsUserAgentInternetExplorerOnWindowsMenuItem;
 370     private MenuItem optionsUserAgentSafariOnMacosMenuItem;
 371     private MenuItem optionsUserAgentCustomMenuItem;
 372     private MenuItem optionsSwipeToRefreshMenuItem;
 373     private MenuItem optionsWideViewportMenuItem;
 374     private MenuItem optionsDisplayImagesMenuItem;
 375     private MenuItem optionsDarkWebViewMenuItem;
 376     private MenuItem optionsFontSizeMenuItem;
 377     private MenuItem optionsAddOrEditDomainMenuItem;
 378
 379     @Override
 380     // Remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
 381     @SuppressLint("ClickableViewAccessibility")
 382     protected void onCreate(Bundle savedInstanceState) {
 383         // Run the default commands.
 384         super.onCreate(savedInstanceState);
 385
 386         // Check to see if the activity has been restarted.
 387         if (savedInstanceState != null) {
 388             // Store the saved instance state variables.
 389             savedStateArrayList = savedInstanceState.getParcelableArrayList(SAVED_STATE_ARRAY_LIST);
 390             savedNestedScrollWebViewStateArrayList = savedInstanceState.getParcelableArrayList(SAVED_NESTED_SCROLL_WEBVIEW_STATE_ARRAY_LIST);
 391             savedTabPosition = savedInstanceState.getInt(SAVED_TAB_POSITION);
 392             savedProxyMode = savedInstanceState.getString(PROXY_MODE);
 393         }
 394
 395         // Initialize the default preference values the first time the program is run.  `false` keeps this command from resetting any current preferences back to default.
 396         PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
 397
 398         // Get a handle for the shared preferences.
 399         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 400
 401         // Get the preferences.
 402         String appTheme = sharedPreferences.getString("app_theme", getString(R.string.app_theme_default_value));
 403         boolean allowScreenshots = sharedPreferences.getBoolean(getString(R.string.allow_screenshots_key), false);
 404         bottomAppBar = sharedPreferences.getBoolean(getString(R.string.bottom_app_bar_key), false);
 405
 406         // Get the theme entry values string array.
 407         String[] appThemeEntryValuesStringArray = getResources().getStringArray(R.array.app_theme_entry_values);
 408
 409         // Set the app theme according to the preference.  A switch statement cannot be used because the theme entry values string array is not a compile time constant.
 410         if (appTheme.equals(appThemeEntryValuesStringArray[1])) {  // The light theme is selected.
 411             // Apply the light theme.
 412             AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
 413         } else if (appTheme.equals(appThemeEntryValuesStringArray[2])) {  // The dark theme is selected.
 414             // Apply the dark theme.
 415             AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
 416         } else {  // The system default theme is selected.
 417             if (Build.VERSION.SDK_INT >= 28) {  // The system default theme is supported.
 418                 // Follow the system default theme.
 419                 AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM);
 420             } else {  // The system default theme is not supported.
 421                 // Follow the battery saver mode.
 422                 AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY);
 423             }
 424         }
 425
 426         // Disable screenshots if not allowed.
 427         if (!allowScreenshots) {
 428             getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
 429         }
 430
 431         // Enable the drawing of the entire webpage.  This makes it possible to save a website image.  This must be done before anything else happens with the WebView.
 432         if (Build.VERSION.SDK_INT >= 21) {
 433             WebView.enableSlowWholeDocumentDraw();
 434         }
 435
 436         // Set the theme.
 437         setTheme(R.style.PrivacyBrowser);
 438
 439         // Set the content view.
 440         if (bottomAppBar) {
 441             setContentView(R.layout.main_framelayout_bottom_appbar);
 442         } else {
 443             setContentView(R.layout.main_framelayout_top_appbar);
 444         }
 445
 446         // Get handles for the views.
 447         rootFrameLayout = findViewById(R.id.root_framelayout);
 448         drawerLayout = findViewById(R.id.drawerlayout);
 449         mainContentRelativeLayout = findViewById(R.id.main_content_relativelayout);
 450         appBarLayout = findViewById(R.id.appbar_layout);
 451         toolbar = findViewById(R.id.toolbar);
 452         findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
 453         tabsLinearLayout = findViewById(R.id.tabs_linearlayout);
 454         tabLayout = findViewById(R.id.tablayout);
 455         swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
 456         webViewPager = findViewById(R.id.webviewpager);
 457         fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
 458
 459         // Get a handle for the navigation view.
 460         NavigationView navigationView = findViewById(R.id.navigationview);
 461
 462         // Get a handle for the navigation menu.
 463         Menu navigationMenu = navigationView.getMenu();
 464
 465         // Get handles for the navigation menu items.
 466         navigationBackMenuItem = navigationMenu.findItem(R.id.back);
 467         navigationForwardMenuItem = navigationMenu.findItem(R.id.forward);
 468         navigationHistoryMenuItem = navigationMenu.findItem(R.id.history);
 469         navigationRequestsMenuItem = navigationMenu.findItem(R.id.requests);
 470
 471         // Listen for touches on the navigation menu.
 472         navigationView.setNavigationItemSelectedListener(this);
 473
 474         // Get a handle for the app compat delegate.
 475         AppCompatDelegate appCompatDelegate = getDelegate();
 476
 477         // Set the support action bar.
 478         appCompatDelegate.setSupportActionBar(toolbar);
 479
 480         // Get a handle for the action bar.
 481         actionBar = appCompatDelegate.getSupportActionBar();
 482
 483         // Remove the incorrect lint warning below that the action bar might be null.
 484         assert actionBar != null;
 485
 486         // Add the custom layout, which shows the URL text bar.
 487         actionBar.setCustomView(R.layout.url_app_bar);
 488         actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
 489
 490         // Get handles for the views in the URL app bar.
 491         urlRelativeLayout = findViewById(R.id.url_relativelayout);
 492         urlEditText = findViewById(R.id.url_edittext);
 493
 494         // Create the hamburger icon at the start of the AppBar.
 495         actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.open_navigation_drawer, R.string.close_navigation_drawer);
 496
 497         // Initially disable the sliding drawers.  They will be enabled once the blocklists are loaded.
 498         drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 499
 500         // Initialize the web view pager adapter.
 501         webViewPagerAdapter = new WebViewPagerAdapter(getSupportFragmentManager());
 502
 503         // Set the pager adapter on the web view pager.
 504         webViewPager.setAdapter(webViewPagerAdapter);
 505
 506         // Store up to 100 tabs in memory.
 507         webViewPager.setOffscreenPageLimit(100);
 508
 509         // Initialize the app.
 510         initializeApp();
 511
 512         // Apply the app settings from the shared preferences.
 513         applyAppSettings();
 514
 515         // Populate the blocklists.
 516         populateBlocklists = new PopulateBlocklists(this, this).execute();
 517     }
 518
 519     @Override
 520     protected void onNewIntent(Intent intent) {
 521         // Run the default commands.
 522         super.onNewIntent(intent);
 523
 524         // Replace the intent that started the app with this one.
 525         setIntent(intent);
 526
 527         // Check to see if the app is being restarted from a saved state.
 528         if (savedStateArrayList == null || savedStateArrayList.size() == 0) {  // The activity is not being restarted from a saved state.
 529             // Get the information from the intent.
 530             String intentAction = intent.getAction();
 531             Uri intentUriData = intent.getData();
 532             String intentStringExtra = intent.getStringExtra(Intent.EXTRA_TEXT);
 533
 534             // Determine if this is a web search.
 535             boolean isWebSearch = ((intentAction != null) && intentAction.equals(Intent.ACTION_WEB_SEARCH));
 536
 537             // Only process the URI if it contains data or it is a web search.  If the user pressed the desktop icon after the app was already running the URI will be null.
 538             if (intentUriData != null || intentStringExtra != null || isWebSearch) {
 539                 // Exit the full screen video if it is displayed.
 540                 if (displayingFullScreenVideo) {
 541                     // Exit full screen video mode.
 542                     exitFullScreenVideo();
 543
 544                     // Reload the current WebView.  Otherwise, it can display entirely black.
 545                     currentWebView.reload();
 546                 }
 547
 548                 // Get the shared preferences.
 549                 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 550
 551                 // Create a URL string.
 552                 String url;
 553
 554                 // If the intent action is a web search, perform the search.
 555                 if (isWebSearch) {  // The intent is a web search.
 556                     // Create an encoded URL string.
 557                     String encodedUrlString;
 558
 559                     // Sanitize the search input and convert it to a search.
 560                     try {
 561                         encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
 562                     } catch (UnsupportedEncodingException exception) {
 563                         encodedUrlString = "";
 564                     }
 565
 566                     // Add the base search URL.
 567                     url = searchURL + encodedUrlString;
 568                 } else if (intentUriData != null) {  // The intent contains a URL formatted as a URI.
 569                     // Set the intent data as the URL.
 570                     url = intentUriData.toString();
 571                 } else {  // The intent contains a string, which might be a URL.
 572                     // Set the intent string as the URL.
 573                     url = intentStringExtra;
 574                 }
 575
 576                 // Add a new tab if specified in the preferences.
 577                 if (sharedPreferences.getBoolean("open_intents_in_new_tab", true)) {  // Load the URL in a new tab.
 578                     // Set the loading new intent flag.
 579                     loadingNewIntent = true;
 580
 581                     // Add a new tab.
 582                     addNewTab(url, true);
 583                 } else {  // Load the URL in the current tab.
 584                     // Make it so.
 585                     loadUrl(currentWebView, url);
 586                 }
 587
 588                 // Close the navigation drawer if it is open.
 589                 if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
 590                     drawerLayout.closeDrawer(GravityCompat.START);
 591                 }
 592
 593                 // Close the bookmarks drawer if it is open.
 594                 if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
 595                     drawerLayout.closeDrawer(GravityCompat.END);
 596                 }
 597             }
 598         }
 599     }
 600
 601     @Override
 602     public void onRestart() {
 603         // Run the default commands.
 604         super.onRestart();
 605
 606         // Apply the app settings if returning from the Settings activity.
 607         if (reapplyAppSettingsOnRestart) {
 608             // Reset the reapply app settings on restart tracker.
 609             reapplyAppSettingsOnRestart = false;
 610
 611             // Apply the app settings.
 612             applyAppSettings();
 613         }
 614
 615         // Apply the domain settings if returning from the settings or domains activity.
 616         if (reapplyDomainSettingsOnRestart) {
 617             // Reset the reapply domain settings on restart tracker.
 618             reapplyDomainSettingsOnRestart = false;
 619
 620             // Reapply the domain settings for each tab.
 621             for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
 622                 // Get the WebView tab fragment.
 623                 WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 624
 625                 // Get the fragment view.
 626                 View fragmentView = webViewTabFragment.getView();
 627
 628                 // Only reload the WebViews if they exist.
 629                 if (fragmentView != null) {
 630                     // Get the nested scroll WebView from the tab fragment.
 631                     NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 632
 633                     // Reset the current domain name so the domain settings will be reapplied.
 634                     nestedScrollWebView.resetCurrentDomainName();
 635
 636                     // Reapply the domain settings if the URL is not null, which can happen if an empty tab is active when returning from settings.
 637                     if (nestedScrollWebView.getUrl() != null) {
 638                         applyDomainSettings(nestedScrollWebView, nestedScrollWebView.getUrl(), false, true, false);
 639                     }
 640                 }
 641             }
 642         }
 643
 644         // Update the bookmarks drawer if returning from the Bookmarks activity.
 645         if (restartFromBookmarksActivity) {
 646             // Close the bookmarks drawer.
 647             drawerLayout.closeDrawer(GravityCompat.END);
 648
 649             // Reload the bookmarks drawer.
 650             loadBookmarksFolder();
 651
 652             // Reset `restartFromBookmarksActivity`.
 653             restartFromBookmarksActivity = false;
 654         }
 655
 656         // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
 657         updatePrivacyIcons(true);
 658     }
 659
 660     // `onStart()` runs after `onCreate()` or `onRestart()`.  This is used instead of `onResume()` so the commands aren't called every time the screen is partially hidden.
 661     @Override
 662     public void onStart() {
 663         // Run the default commands.
 664         super.onStart();
 665
 666         // Resume any WebViews.
 667         for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
 668             // Get the WebView tab fragment.
 669             WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 670
 671             // Get the fragment view.
 672             View fragmentView = webViewTabFragment.getView();
 673
 674             // Only resume the WebViews if they exist (they won't when the app is first created).
 675             if (fragmentView != null) {
 676                 // Get the nested scroll WebView from the tab fragment.
 677                 NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 678
 679                 // Resume the nested scroll WebView.
 680                 nestedScrollWebView.onResume();
 681             }
 682         }
 683
 684         // Resume the nested scroll WebView JavaScript timers.  This is a global command that resumes JavaScript timers on all WebViews.
 685         if (currentWebView != null) {
 686             currentWebView.resumeTimers();
 687         }
 688
 689         // Reapply the proxy settings if the system is using a proxy.  This redisplays the appropriate alert dialog.
 690         if (!proxyMode.equals(ProxyHelper.NONE)) {
 691             applyProxy(false);
 692         }
 693
 694         // Reapply any system UI flags and the ad in the free flavor.
 695         if (displayingFullScreenVideo || inFullScreenBrowsingMode) {  // The system is displaying a website or a video in full screen mode.
 696             /* Hide the system bars.
 697              * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
 698              * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
 699              * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
 700              * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
 701              */
 702             rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
 703                     View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
 704         } else if (BuildConfig.FLAVOR.contentEquals("free")) {  // The system in not in full screen mode.
 705             // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
 706             View adView = findViewById(R.id.adview);
 707
 708             // Resume the ad.
 709             AdHelper.resumeAd(adView);
 710         }
 711
 712         // Show any pending dialogs.
 713         for (int i = 0; i < pendingDialogsArrayList.size(); i++) {
 714             // Get the pending dialog from the array list.
 715             PendingDialog pendingDialog = pendingDialogsArrayList.get(i);
 716
 717             // Show the pending dialog.
 718             pendingDialog.dialogFragment.show(getSupportFragmentManager(), pendingDialog.tag);
 719         }
 720
 721         // Clear the pending dialogs array list.
 722         pendingDialogsArrayList.clear();
 723     }
 724
 725     // `onStop()` runs after `onPause()`.  It is used instead of `onPause()` so the commands are not called every time the screen is partially hidden.
 726     @Override
 727     public void onStop() {
 728         // Run the default commands.
 729         super.onStop();
 730
 731         for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
 732             // Get the WebView tab fragment.
 733             WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 734
 735             // Get the fragment view.
 736             View fragmentView = webViewTabFragment.getView();
 737
 738             // Only pause the WebViews if they exist (they won't when the app is first created).
 739             if (fragmentView != null) {
 740                 // Get the nested scroll WebView from the tab fragment.
 741                 NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 742
 743                 // Pause the nested scroll WebView.
 744                 nestedScrollWebView.onPause();
 745             }
 746         }
 747
 748         // Pause the WebView JavaScript timers.  This is a global command that pauses JavaScript on all WebViews.
 749         if (currentWebView != null) {
 750             currentWebView.pauseTimers();
 751         }
 752
 753         // Pause the ad or it will continue to consume resources in the background on the free flavor.
 754         if (BuildConfig.FLAVOR.contentEquals("free")) {
 755             // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
 756             View adView = findViewById(R.id.adview);
 757
 758             // Pause the ad.
 759             AdHelper.pauseAd(adView);
 760         }
 761     }
 762
 763     @Override
 764     public void onSaveInstanceState(@NonNull Bundle savedInstanceState) {
 765         // Run the default commands.
 766         super.onSaveInstanceState(savedInstanceState);
 767
 768         // Create the saved state array lists.
 769         ArrayList<Bundle> savedStateArrayList = new ArrayList<>();
 770         ArrayList<Bundle> savedNestedScrollWebViewStateArrayList = new ArrayList<>();
 771
 772         // Get the URLs from each tab.
 773         for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
 774             // Get the WebView tab fragment.
 775             WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 776
 777             // Get the fragment view.
 778             View fragmentView = webViewTabFragment.getView();
 779
 780             if (fragmentView != null) {
 781                 // Get the nested scroll WebView from the tab fragment.
 782                 NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 783
 784                 // Create saved state bundle.
 785                 Bundle savedStateBundle = new Bundle();
 786
 787                 // Get the current states.
 788                 nestedScrollWebView.saveState(savedStateBundle);
 789                 Bundle savedNestedScrollWebViewStateBundle = nestedScrollWebView.saveNestedScrollWebViewState();
 790
 791                 // Store the saved states in the array lists.
 792                 savedStateArrayList.add(savedStateBundle);
 793                 savedNestedScrollWebViewStateArrayList.add(savedNestedScrollWebViewStateBundle);
 794             }
 795         }
 796
 797         // Get the current tab position.
 798         int currentTabPosition = tabLayout.getSelectedTabPosition();
 799
 800         // Store the saved states in the bundle.
 801         savedInstanceState.putParcelableArrayList(SAVED_STATE_ARRAY_LIST, savedStateArrayList);
 802         savedInstanceState.putParcelableArrayList(SAVED_NESTED_SCROLL_WEBVIEW_STATE_ARRAY_LIST, savedNestedScrollWebViewStateArrayList);
 803         savedInstanceState.putInt(SAVED_TAB_POSITION, currentTabPosition);
 804         savedInstanceState.putString(PROXY_MODE, proxyMode);
 805     }
 806
 807     @Override
 808     public void onDestroy() {
 809         // Unregister the orbot status broadcast receiver if it exists.
 810         if (orbotStatusBroadcastReceiver != null) {
 811             this.unregisterReceiver(orbotStatusBroadcastReceiver);
 812         }
 813
 814         // Close the bookmarks cursor if it exists.
 815         if (bookmarksCursor != null) {
 816             bookmarksCursor.close();
 817         }
 818
 819         // Close the bookmarks database if it exists.
 820         if (bookmarksDatabaseHelper != null) {
 821             bookmarksDatabaseHelper.close();
 822         }
 823
 824         // Stop populating the blocklists if the AsyncTask is running in the background.
 825         if (populateBlocklists != null) {
 826             populateBlocklists.cancel(true);
 827         }
 828
 829         // Run the default commands.
 830         super.onDestroy();
 831     }
 832
 833     @Override
 834     public boolean onCreateOptionsMenu(Menu menu) {
 835         // Inflate the menu.  This adds items to the action bar if it is present.
 836         getMenuInflater().inflate(R.menu.webview_options_menu, menu);
 837
 838         // Store a handle for the options menu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons()`.
 839         optionsMenu = menu;
 840
 841         // Get handles for the class menu items.
 842         optionsPrivacyMenuItem = menu.findItem(R.id.javascript);
 843         optionsRefreshMenuItem = menu.findItem(R.id.refresh);
 844         optionsCookiesMenuItem = menu.findItem(R.id.cookies);
 845         optionsDomStorageMenuItem = menu.findItem(R.id.dom_storage);
 846         optionsSaveFormDataMenuItem = menu.findItem(R.id.save_form_data);  // Form data can be removed once the minimum API >= 26.
 847         optionsClearDataMenuItem = menu.findItem(R.id.clear_data);
 848         optionsClearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
 849         optionsClearDomStorageMenuItem = menu.findItem(R.id.clear_dom_storage);
 850         optionsClearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
 851         optionsBlocklistsMenuItem = menu.findItem(R.id.blocklists);
 852         optionsEasyListMenuItem = menu.findItem(R.id.easylist);
 853         optionsEasyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
 854         optionsFanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
 855         optionsFanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
 856         optionsUltraListMenuItem = menu.findItem(R.id.ultralist);
 857         optionsUltraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
 858         optionsBlockAllThirdPartyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
 859         optionsProxyMenuItem = menu.findItem(R.id.proxy);
 860         optionsProxyNoneMenuItem = menu.findItem(R.id.proxy_none);
 861         optionsProxyTorMenuItem = menu.findItem(R.id.proxy_tor);
 862         optionsProxyI2pMenuItem = menu.findItem(R.id.proxy_i2p);
 863         optionsProxyCustomMenuItem = menu.findItem(R.id.proxy_custom);
 864         optionsUserAgentMenuItem = menu.findItem(R.id.user_agent);
 865         optionsUserAgentPrivacyBrowserMenuItem = menu.findItem(R.id.user_agent_privacy_browser);
 866         optionsUserAgentWebViewDefaultMenuItem = menu.findItem(R.id.user_agent_webview_default);
 867         optionsUserAgentFirefoxOnAndroidMenuItem = menu.findItem(R.id.user_agent_firefox_on_android);
 868         optionsUserAgentChromeOnAndroidMenuItem = menu.findItem(R.id.user_agent_chrome_on_android);
 869         optionsUserAgentSafariOnIosMenuItem = menu.findItem(R.id.user_agent_safari_on_ios);
 870         optionsUserAgentFirefoxOnLinuxMenuItem = menu.findItem(R.id.user_agent_firefox_on_linux);
 871         optionsUserAgentChromiumOnLinuxMenuItem = menu.findItem(R.id.user_agent_chromium_on_linux);
 872         optionsUserAgentFirefoxOnWindowsMenuItem = menu.findItem(R.id.user_agent_firefox_on_windows);
 873         optionsUserAgentChromeOnWindowsMenuItem = menu.findItem(R.id.user_agent_chrome_on_windows);
 874         optionsUserAgentEdgeOnWindowsMenuItem = menu.findItem(R.id.user_agent_edge_on_windows);
 875         optionsUserAgentInternetExplorerOnWindowsMenuItem = menu.findItem(R.id.user_agent_internet_explorer_on_windows);
 876         optionsUserAgentSafariOnMacosMenuItem = menu.findItem(R.id.user_agent_safari_on_macos);
 877         optionsUserAgentCustomMenuItem = menu.findItem(R.id.user_agent_custom);
 878         optionsSwipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
 879         optionsWideViewportMenuItem = menu.findItem(R.id.wide_viewport);
 880         optionsDisplayImagesMenuItem = menu.findItem(R.id.display_images);
 881         optionsDarkWebViewMenuItem = menu.findItem(R.id.dark_webview);
 882         optionsFontSizeMenuItem = menu.findItem(R.id.font_size);
 883         optionsAddOrEditDomainMenuItem = menu.findItem(R.id.add_or_edit_domain);
 884
 885         // Get handles for the method menu items.
 886         MenuItem bookmarksMenuItem = menu.findItem(R.id.bookmarks);
 887         MenuItem adConsentMenuItem = menu.findItem(R.id.ad_consent);
 888
 889         // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
 890         updatePrivacyIcons(false);
 891
 892         // Only display the form data menu items if the API < 26.
 893         optionsSaveFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
 894         optionsClearFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
 895
 896         // Disable the clear form data menu item if the API >= 26 so that the status of the main Clear Data is calculated correctly.
 897         optionsClearFormDataMenuItem.setEnabled(Build.VERSION.SDK_INT < 26);
 898
 899         // Only display the dark WebView menu item if API >= 21.
 900         optionsDarkWebViewMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
 901
 902         // Only show Ad Consent if this is the free flavor.
 903         adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
 904
 905         // Get the shared preferences.
 906         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 907
 908         // Get the dark theme and app bar preferences.
 909         boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean(getString(R.string.display_additional_app_bar_icons_key), false);
 910
 911         // Set the status of the additional app bar icons.  Setting the refresh menu item to `SHOW_AS_ACTION_ALWAYS` makes it appear even on small devices like phones.
 912         if (displayAdditionalAppBarIcons) {
 913             optionsRefreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
 914             bookmarksMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
 915             optionsCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
 916         } else { //Do not display the additional icons.
 917             optionsRefreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
 918             bookmarksMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
 919             optionsCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
 920         }
 921
 922         // Replace Refresh with Stop if a URL is already loading.
 923         if (currentWebView != null && currentWebView.getProgress() != 100) {
 924             // Set the title.
 925             optionsRefreshMenuItem.setTitle(R.string.stop);
 926
 927             // Set the icon if it is displayed in the app bar.
 928             if (displayAdditionalAppBarIcons) {
 929                 // Get the current theme status.
 930                 int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
 931
 932                 // Set the icon according to the current theme status.
 933                 if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
 934                     optionsRefreshMenuItem.setIcon(R.drawable.close_blue_day);
 935                 } else {
 936                     optionsRefreshMenuItem.setIcon(R.drawable.close_blue_night);
 937                 }
 938             }
 939         }
 940
 941         // Done.
 942         return true;
 943     }
 944
 945     @Override
 946     public boolean onPrepareOptionsMenu(Menu menu) {
 947         // Get a handle for the cookie manager.
 948         CookieManager cookieManager = CookieManager.getInstance();
 949
 950         // Initialize the current user agent string and the font size.
 951         String currentUserAgent = getString(R.string.user_agent_privacy_browser);
 952         int fontSize = 100;
 953
 954         // Set items that require the current web view to be populated.  It will be null when the program is first opened, as `onPrepareOptionsMenu()` is called before the first WebView is initialized.
 955         if (currentWebView != null) {
 956             // Set the add or edit domain text.
 957             if (currentWebView.getDomainSettingsApplied()) {
 958                 optionsAddOrEditDomainMenuItem.setTitle(R.string.edit_domain_settings);
 959             } else {
 960                 optionsAddOrEditDomainMenuItem.setTitle(R.string.add_domain_settings);
 961             }
 962
 963             // Get the current user agent from the WebView.
 964             currentUserAgent = currentWebView.getSettings().getUserAgentString();
 965
 966             // Get the current font size from the
 967             fontSize = currentWebView.getSettings().getTextZoom();
 968
 969             // Set the status of the menu item checkboxes.
 970             optionsDomStorageMenuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
 971             optionsSaveFormDataMenuItem.setChecked(currentWebView.getSettings().getSaveFormData());  // Form data can be removed once the minimum API >= 26.
 972             optionsEasyListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
 973             optionsEasyPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
 974             optionsFanboysAnnoyanceListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
 975             optionsFanboysSocialBlockingListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
 976             optionsUltraListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
 977             optionsUltraPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
 978             optionsBlockAllThirdPartyRequestsMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
 979             optionsSwipeToRefreshMenuItem.setChecked(currentWebView.getSwipeToRefresh());
 980             optionsWideViewportMenuItem.setChecked(currentWebView.getSettings().getUseWideViewPort());
 981             optionsDisplayImagesMenuItem.setChecked(currentWebView.getSettings().getLoadsImagesAutomatically());
 982
 983             // Initialize the display names for the blocklists with the number of blocked requests.
 984             optionsBlocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + currentWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
 985             optionsEasyListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASYLIST) + " - " + getString(R.string.easylist));
 986             optionsEasyPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASYPRIVACY) + " - " + getString(R.string.easyprivacy));
 987             optionsFanboysAnnoyanceListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST) + " - " + getString(R.string.fanboys_annoyance_list));
 988             optionsFanboysSocialBlockingListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST) + " - " + getString(R.string.fanboys_social_blocking_list));
 989             optionsUltraListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.ULTRALIST) + " - " + getString(R.string.ultralist));
 990             optionsUltraPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.ULTRAPRIVACY) + " - " + getString(R.string.ultraprivacy));
 991             optionsBlockAllThirdPartyRequestsMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS) + " - " + getString(R.string.block_all_third_party_requests));
 992
 993             // Enable DOM Storage if JavaScript is enabled.
 994             optionsDomStorageMenuItem.setEnabled(currentWebView.getSettings().getJavaScriptEnabled());
 995
 996             // Set the checkbox status for dark WebView if the WebView supports it.
 997             if (WebViewFeature.isFeatureSupported(WebViewFeature.FORCE_DARK)) {
 998                 optionsDarkWebViewMenuItem.setChecked(WebSettingsCompat.getForceDark(currentWebView.getSettings()) == WebSettingsCompat.FORCE_DARK_ON);
 999             }
1000         }
1001
1002         // Set the cookies menu item checked status.
1003         optionsCookiesMenuItem.setChecked(cookieManager.acceptCookie());
1004
1005         // Enable Clear Cookies if there are any.
1006         optionsClearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
1007
1008         // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`, which links to `/data/data/com.stoutner.privacybrowser.standard`.
1009         String privateDataDirectoryString = getApplicationInfo().dataDir;
1010
1011         // Get a count of the number of files in the Local Storage directory.
1012         File localStorageDirectory = new File (privateDataDirectoryString + "/app_webview/Local Storage/");
1013         int localStorageDirectoryNumberOfFiles = 0;
1014         if (localStorageDirectory.exists()) {
1015             // `Objects.requireNonNull` removes a lint warning that `localStorageDirectory.list` might produce a null pointed exception if it is dereferenced.
1016             localStorageDirectoryNumberOfFiles = Objects.requireNonNull(localStorageDirectory.list()).length;
1017         }
1018
1019         // Get a count of the number of files in the IndexedDB directory.
1020         File indexedDBDirectory = new File (privateDataDirectoryString + "/app_webview/IndexedDB");
1021         int indexedDBDirectoryNumberOfFiles = 0;
1022         if (indexedDBDirectory.exists()) {
1023             // `Objects.requireNonNull` removes a lint warning that `indexedDBDirectory.list` might produce a null pointed exception if it is dereferenced.
1024             indexedDBDirectoryNumberOfFiles = Objects.requireNonNull(indexedDBDirectory.list()).length;
1025         }
1026
1027         // Enable Clear DOM Storage if there is any.
1028         optionsClearDomStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
1029
1030         // Enable Clear Form Data is there is any.  This can be removed once the minimum API >= 26.
1031         if (Build.VERSION.SDK_INT < 26) {
1032             // Get the WebView database.
1033             WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
1034
1035             // Enable the clear form data menu item if there is anything to clear.
1036             optionsClearFormDataMenuItem.setEnabled(webViewDatabase.hasFormData());
1037         }
1038
1039         // Enable Clear Data if any of the submenu items are enabled.
1040         optionsClearDataMenuItem.setEnabled(optionsClearCookiesMenuItem.isEnabled() || optionsClearDomStorageMenuItem.isEnabled() || optionsClearFormDataMenuItem.isEnabled());
1041
1042         // Disable Fanboy's Social Blocking List menu item if Fanboy's Annoyance List is checked.
1043         optionsFanboysSocialBlockingListMenuItem.setEnabled(!optionsFanboysAnnoyanceListMenuItem.isChecked());
1044
1045         // Set the proxy title and check the applied proxy.
1046         switch (proxyMode) {
1047             case ProxyHelper.NONE:
1048                 // Set the proxy title.
1049                 optionsProxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_none));
1050
1051                 // Check the proxy None radio button.
1052                 optionsProxyNoneMenuItem.setChecked(true);
1053                 break;
1054
1055             case ProxyHelper.TOR:
1056                 // Set the proxy title.
1057                 optionsProxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_tor));
1058
1059                 // Check the proxy Tor radio button.
1060                 optionsProxyTorMenuItem.setChecked(true);
1061                 break;
1062
1063             case ProxyHelper.I2P:
1064                 // Set the proxy title.
1065                 optionsProxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_i2p));
1066
1067                 // Check the proxy I2P radio button.
1068                 optionsProxyI2pMenuItem.setChecked(true);
1069                 break;
1070
1071             case ProxyHelper.CUSTOM:
1072                 // Set the proxy title.
1073                 optionsProxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_custom));
1074
1075                 // Check the proxy Custom radio button.
1076                 optionsProxyCustomMenuItem.setChecked(true);
1077                 break;
1078         }
1079
1080         // Select the current user agent menu item.  A switch statement cannot be used because the user agents are not compile time constants.
1081         if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[0])) {  // Privacy Browser.
1082             // Update the user agent menu item title.
1083             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_privacy_browser));
1084
1085             // Select the Privacy Browser radio box.
1086             optionsUserAgentPrivacyBrowserMenuItem.setChecked(true);
1087         } else if (currentUserAgent.equals(webViewDefaultUserAgent)) {  // WebView Default.
1088             // Update the user agent menu item title.
1089             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_webview_default));
1090
1091             // Select the WebView Default radio box.
1092             optionsUserAgentWebViewDefaultMenuItem.setChecked(true);
1093         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[2])) {  // Firefox on Android.
1094             // Update the user agent menu item title.
1095             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_firefox_on_android));
1096
1097             // Select the Firefox on Android radio box.
1098             optionsUserAgentFirefoxOnAndroidMenuItem.setChecked(true);
1099         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[3])) {  // Chrome on Android.
1100             // Update the user agent menu item title.
1101             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_chrome_on_android));
1102
1103             // Select the Chrome on Android radio box.
1104             optionsUserAgentChromeOnAndroidMenuItem.setChecked(true);
1105         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[4])) {  // Safari on iOS.
1106             // Update the user agent menu item title.
1107             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_safari_on_ios));
1108
1109             // Select the Safari on iOS radio box.
1110             optionsUserAgentSafariOnIosMenuItem.setChecked(true);
1111         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[5])) {  // Firefox on Linux.
1112             // Update the user agent menu item title.
1113             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_firefox_on_linux));
1114
1115             // Select the Firefox on Linux radio box.
1116             optionsUserAgentFirefoxOnLinuxMenuItem.setChecked(true);
1117         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[6])) {  // Chromium on Linux.
1118             // Update the user agent menu item title.
1119             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_chromium_on_linux));
1120
1121             // Select the Chromium on Linux radio box.
1122             optionsUserAgentChromiumOnLinuxMenuItem.setChecked(true);
1123         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[7])) {  // Firefox on Windows.
1124             // Update the user agent menu item title.
1125             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_firefox_on_windows));
1126
1127             // Select the Firefox on Windows radio box.
1128             optionsUserAgentFirefoxOnWindowsMenuItem.setChecked(true);
1129         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[8])) {  // Chrome on Windows.
1130             // Update the user agent menu item title.
1131             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_chrome_on_windows));
1132
1133             // Select the Chrome on Windows radio box.
1134             optionsUserAgentChromeOnWindowsMenuItem.setChecked(true);
1135         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[9])) {  // Edge on Windows.
1136             // Update the user agent menu item title.
1137             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_edge_on_windows));
1138
1139             // Select the Edge on Windows radio box.
1140             optionsUserAgentEdgeOnWindowsMenuItem.setChecked(true);
1141         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[10])) {  // Internet Explorer on Windows.
1142             // Update the user agent menu item title.
1143             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_internet_explorer_on_windows));
1144
1145             // Select the Internet on Windows radio box.
1146             optionsUserAgentInternetExplorerOnWindowsMenuItem.setChecked(true);
1147         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[11])) {  // Safari on macOS.
1148             // Update the user agent menu item title.
1149             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_safari_on_macos));
1150
1151             // Select the Safari on macOS radio box.
1152             optionsUserAgentSafariOnMacosMenuItem.setChecked(true);
1153         } else {  // Custom user agent.
1154             // Update the user agent menu item title.
1155             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_custom));
1156
1157             // Select the Custom radio box.
1158             optionsUserAgentCustomMenuItem.setChecked(true);
1159         }
1160
1161         // Set the font size title.
1162         optionsFontSizeMenuItem.setTitle(getString(R.string.font_size) + " - " + fontSize + "%");
1163
1164         // Run all the other default commands.
1165         super.onPrepareOptionsMenu(menu);
1166
1167         // Display the menu.
1168         return true;
1169     }
1170
1171     @Override
1172     public boolean onOptionsItemSelected(MenuItem menuItem) {
1173         // Get a handle for the shared preferences.
1174         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
1175
1176         // Get a handle for the cookie manager.
1177         CookieManager cookieManager = CookieManager.getInstance();
1178
1179         // Get the selected menu item ID.
1180         int menuItemId = menuItem.getItemId();
1181
1182         // Run the commands that correlate to the selected menu item.
1183         if (menuItemId == R.id.javascript) {  // JavaScript.
1184             // Toggle the JavaScript status.
1185             currentWebView.getSettings().setJavaScriptEnabled(!currentWebView.getSettings().getJavaScriptEnabled());
1186
1187             // Update the privacy icon.
1188             updatePrivacyIcons(true);
1189
1190             // Display a `Snackbar`.
1191             if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScrip is enabled.
1192                 Snackbar.make(webViewPager, R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
1193             } else if (cookieManager.acceptCookie()) {  // JavaScript is disabled, but first-party cookies are enabled.
1194                 Snackbar.make(webViewPager, R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
1195             } else {  // Privacy mode.
1196                 Snackbar.make(webViewPager, R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
1197             }
1198
1199             // Reload the current WebView.
1200             currentWebView.reload();
1201
1202             // Consume the event.
1203             return true;
1204         } else if (menuItemId == R.id.refresh) {  // Refresh.
1205             // Run the command that correlates to the current status of the menu item.
1206             if (menuItem.getTitle().equals(getString(R.string.refresh))) {  // The refresh button was pushed.
1207                 // Reload the current WebView.
1208                 currentWebView.reload();
1209             } else {  // The stop button was pushed.
1210                 // Stop the loading of the WebView.
1211                 currentWebView.stopLoading();
1212             }
1213
1214             // Consume the event.
1215             return true;
1216         } else if (menuItemId == R.id.bookmarks) {  // Bookmarks.
1217             // Open the bookmarks drawer.
1218             drawerLayout.openDrawer(GravityCompat.END);
1219
1220             // Consume the event.
1221             return true;
1222         } else if (menuItemId == R.id.cookies) {  // Cookies.
1223             // Switch the first-party cookie status.
1224             cookieManager.setAcceptCookie(!cookieManager.acceptCookie());
1225
1226             // Store the cookie status.
1227             currentWebView.setAcceptCookies(cookieManager.acceptCookie());
1228
1229             // Update the menu checkbox.
1230             menuItem.setChecked(cookieManager.acceptCookie());
1231
1232             // Update the privacy icon.
1233             updatePrivacyIcons(true);
1234
1235             // Display a snackbar.
1236             if (cookieManager.acceptCookie()) {  // Cookies are enabled.
1237                 Snackbar.make(webViewPager, R.string.cookies_enabled, Snackbar.LENGTH_SHORT).show();
1238             } else if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScript is still enabled.
1239                 Snackbar.make(webViewPager, R.string.cookies_disabled, Snackbar.LENGTH_SHORT).show();
1240             } else {  // Privacy mode.
1241                 Snackbar.make(webViewPager, R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
1242             }
1243
1244             // Reload the current WebView.
1245             currentWebView.reload();
1246
1247             // Consume the event.
1248             return true;
1249         } else if (menuItemId == R.id.dom_storage) {  // DOM storage.
1250             // Toggle the status of domStorageEnabled.
1251             currentWebView.getSettings().setDomStorageEnabled(!currentWebView.getSettings().getDomStorageEnabled());
1252
1253             // Update the menu checkbox.
1254             menuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
1255
1256             // Update the privacy icon.
1257             updatePrivacyIcons(true);
1258
1259             // Display a snackbar.
1260             if (currentWebView.getSettings().getDomStorageEnabled()) {
1261                 Snackbar.make(webViewPager, R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
1262             } else {
1263                 Snackbar.make(webViewPager, R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
1264             }
1265
1266             // Reload the current WebView.
1267             currentWebView.reload();
1268
1269             // Consume the event.
1270             return true;
1271         } else if (menuItemId == R.id.save_form_data) {  // Form data.  This can be removed once the minimum API >= 26.
1272             // Switch the status of saveFormDataEnabled.
1273             currentWebView.getSettings().setSaveFormData(!currentWebView.getSettings().getSaveFormData());
1274
1275             // Update the menu checkbox.
1276             menuItem.setChecked(currentWebView.getSettings().getSaveFormData());
1277
1278             // Display a snackbar.
1279             if (currentWebView.getSettings().getSaveFormData()) {
1280                 Snackbar.make(webViewPager, R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
1281             } else {
1282                 Snackbar.make(webViewPager, R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
1283             }
1284
1285             // Update the privacy icon.
1286             updatePrivacyIcons(true);
1287
1288             // Reload the current WebView.
1289             currentWebView.reload();
1290
1291             // Consume the event.
1292             return true;
1293         } else if (menuItemId == R.id.clear_cookies) {  // Clear cookies.
1294             // Create a snackbar.
1295             Snackbar.make(webViewPager, R.string.cookies_deleted, Snackbar.LENGTH_LONG)
1296                     .setAction(R.string.undo, v -> {
1297                         // Do nothing because everything will be handled by `onDismissed()` below.
1298                     })
1299                     .addCallback(new Snackbar.Callback() {
1300                         @Override
1301                         public void onDismissed(Snackbar snackbar, int event) {
1302                             if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
1303                                 // Delete the cookies, which command varies by SDK.
1304                                 if (Build.VERSION.SDK_INT < 21) {
1305                                     cookieManager.removeAllCookie();
1306                                 } else {
1307                                     cookieManager.removeAllCookies(null);
1308                                 }
1309                             }
1310                         }
1311                     })
1312                     .show();
1313
1314             // Consume the event.
1315             return true;
1316         } else if (menuItemId == R.id.clear_dom_storage) {  // Clear DOM storage.
1317             // Create a snackbar.
1318             Snackbar.make(webViewPager, R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
1319                     .setAction(R.string.undo, v -> {
1320                         // Do nothing because everything will be handled by `onDismissed()` below.
1321                     })
1322                     .addCallback(new Snackbar.Callback() {
1323                         @Override
1324                         public void onDismissed(Snackbar snackbar, int event) {
1325                             if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
1326                                 // Delete the DOM Storage.
1327                                 WebStorage webStorage = WebStorage.getInstance();
1328                                 webStorage.deleteAllData();
1329
1330                                 // Initialize a handler to manually delete the DOM storage files and directories.
1331                                 Handler deleteDomStorageHandler = new Handler();
1332
1333                                 // Setup a runnable to manually delete the DOM storage files and directories.
1334                                 Runnable deleteDomStorageRunnable = () -> {
1335                                     try {
1336                                         // Get a handle for the runtime.
1337                                         Runtime runtime = Runtime.getRuntime();
1338
1339                                         // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`,
1340                                         // which links to `/data/data/com.stoutner.privacybrowser.standard`.
1341                                         String privateDataDirectoryString = getApplicationInfo().dataDir;
1342
1343                                         // A string array must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
1344                                         Process deleteLocalStorageProcess = runtime.exec(new String[]{"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
1345
1346                                         // Multiple commands must be used because `Runtime.exec()` does not like `*`.
1347                                         Process deleteIndexProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
1348                                         Process deleteQuotaManagerProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
1349                                         Process deleteQuotaManagerJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
1350                                         Process deleteDatabasesProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
1351
1352                                         // Wait for the processes to finish.
1353                                         deleteLocalStorageProcess.waitFor();
1354                                         deleteIndexProcess.waitFor();
1355                                         deleteQuotaManagerProcess.waitFor();
1356                                         deleteQuotaManagerJournalProcess.waitFor();
1357                                         deleteDatabasesProcess.waitFor();
1358                                     } catch (Exception exception) {
1359                                         // Do nothing if an error is thrown.
1360                                     }
1361                                 };
1362
1363                                 // Manually delete the DOM storage files after 200 milliseconds.
1364                                 deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
1365                             }
1366                         }
1367                     })
1368                     .show();
1369
1370             // Consume the event.
1371             return true;
1372         } else if (menuItemId == R.id.clear_form_data) {  // Clear form data.  This can be remove once the minimum API >= 26.
1373             // Create a snackbar.
1374             Snackbar.make(webViewPager, R.string.form_data_deleted, Snackbar.LENGTH_LONG)
1375                     .setAction(R.string.undo, v -> {
1376                         // Do nothing because everything will be handled by `onDismissed()` below.
1377                     })
1378                     .addCallback(new Snackbar.Callback() {
1379                         @Override
1380                         public void onDismissed(Snackbar snackbar, int event) {
1381                             if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
1382                                 // Get a handle for the webView database.
1383                                 WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
1384
1385                                 // Delete the form data.
1386                                 webViewDatabase.clearFormData();
1387                             }
1388                         }
1389                     })
1390                     .show();
1391
1392             // Consume the event.
1393             return true;
1394         } else if (menuItemId == R.id.easylist) {  // EasyList.
1395             // Toggle the EasyList status.
1396             currentWebView.enableBlocklist(NestedScrollWebView.EASYLIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
1397
1398             // Update the menu checkbox.
1399             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
1400
1401             // Reload the current WebView.
1402             currentWebView.reload();
1403
1404             // Consume the event.
1405             return true;
1406         } else if (menuItemId == R.id.easyprivacy) {  // EasyPrivacy.
1407             // Toggle the EasyPrivacy status.
1408             currentWebView.enableBlocklist(NestedScrollWebView.EASYPRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
1409
1410             // Update the menu checkbox.
1411             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
1412
1413             // Reload the current WebView.
1414             currentWebView.reload();
1415
1416             // Consume the event.
1417             return true;
1418         } else if (menuItemId == R.id.fanboys_annoyance_list) {  // Fanboy's Annoyance List.
1419             // Toggle Fanboy's Annoyance List status.
1420             currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
1421
1422             // Update the menu checkbox.
1423             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
1424
1425             // Update the status of Fanboy's Social Blocking List.
1426             optionsFanboysSocialBlockingListMenuItem.setEnabled(!currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
1427
1428             // Reload the current WebView.
1429             currentWebView.reload();
1430
1431             // Consume the event.
1432             return true;
1433         } else if (menuItemId == R.id.fanboys_social_blocking_list) {  // Fanboy's Social Blocking List.
1434             // Toggle Fanboy's Social Blocking List status.
1435             currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
1436
1437             // Update the menu checkbox.
1438             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
1439
1440             // Reload the current WebView.
1441             currentWebView.reload();
1442
1443             // Consume the event.
1444             return true;
1445         } else if (menuItemId == R.id.ultralist) {  // UltraList.
1446             // Toggle the UltraList status.
1447             currentWebView.enableBlocklist(NestedScrollWebView.ULTRALIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
1448
1449             // Update the menu checkbox.
1450             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
1451
1452             // Reload the current WebView.
1453             currentWebView.reload();
1454
1455             // Consume the event.
1456             return true;
1457         } else if (menuItemId == R.id.ultraprivacy) {  // UltraPrivacy.
1458             // Toggle the UltraPrivacy status.
1459             currentWebView.enableBlocklist(NestedScrollWebView.ULTRAPRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
1460
1461             // Update the menu checkbox.
1462             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
1463
1464             // Reload the current WebView.
1465             currentWebView.reload();
1466
1467             // Consume the event.
1468             return true;
1469         } else if (menuItemId == R.id.block_all_third_party_requests) {  // Block all third-party requests.
1470             //Toggle the third-party requests blocker status.
1471             currentWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS, !currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
1472
1473             // Update the menu checkbox.
1474             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
1475
1476             // Reload the current WebView.
1477             currentWebView.reload();
1478
1479             // Consume the event.
1480             return true;
1481         } else if (menuItemId == R.id.proxy_none) {  // Proxy - None.
1482             // Update the proxy mode.
1483             proxyMode = ProxyHelper.NONE;
1484
1485             // Apply the proxy mode.
1486             applyProxy(true);
1487
1488             // Consume the event.
1489             return true;
1490         } else if (menuItemId == R.id.proxy_tor) {  // Proxy - Tor.
1491             // Update the proxy mode.
1492             proxyMode = ProxyHelper.TOR;
1493
1494             // Apply the proxy mode.
1495             applyProxy(true);
1496
1497             // Consume the event.
1498             return true;
1499         } else if (menuItemId == R.id.proxy_i2p) {  // Proxy - I2P.
1500             // Update the proxy mode.
1501             proxyMode = ProxyHelper.I2P;
1502
1503             // Apply the proxy mode.
1504             applyProxy(true);
1505
1506             // Consume the event.
1507             return true;
1508         } else if (menuItemId == R.id.proxy_custom) {  // Proxy - Custom.
1509             // Update the proxy mode.
1510             proxyMode = ProxyHelper.CUSTOM;
1511
1512             // Apply the proxy mode.
1513             applyProxy(true);
1514
1515             // Consume the event.
1516             return true;
1517         } else if (menuItemId == R.id.user_agent_privacy_browser) {  // User Agent - Privacy Browser.
1518             // Update the user agent.
1519             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
1520
1521             // Reload the current WebView.
1522             currentWebView.reload();
1523
1524             // Consume the event.
1525             return true;
1526         } else if (menuItemId == R.id.user_agent_webview_default) {  // User Agent - WebView Default.
1527             // Update the user agent.
1528             currentWebView.getSettings().setUserAgentString("");
1529
1530             // Reload the current WebView.
1531             currentWebView.reload();
1532
1533             // Consume the event.
1534             return true;
1535         } else if (menuItemId == R.id.user_agent_firefox_on_android) {  // User Agent - Firefox on Android.
1536             // Update the user agent.
1537             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
1538
1539             // Reload the current WebView.
1540             currentWebView.reload();
1541
1542             // Consume the event.
1543             return true;
1544         } else if (menuItemId == R.id.user_agent_chrome_on_android) {  // User Agent - Chrome on Android.
1545             // Update the user agent.
1546             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);
1547
1548             // Reload the current WebView.
1549             currentWebView.reload();
1550
1551             // Consume the event.
1552             return true;
1553         } else if (menuItemId == R.id.user_agent_safari_on_ios) {  // User Agent - Safari on iOS.
1554             // Update the user agent.
1555             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
1556
1557             // Reload the current WebView.
1558             currentWebView.reload();
1559
1560             // Consume the event.
1561             return true;
1562         } else if (menuItemId == R.id.user_agent_firefox_on_linux) {  // User Agent - Firefox on Linux.
1563             // Update the user agent.
1564             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
1565
1566             // Reload the current WebView.
1567             currentWebView.reload();
1568
1569             // Consume the event.
1570             return true;
1571         } else if (menuItemId == R.id.user_agent_chromium_on_linux) {  // User Agent - Chromium on Linux.
1572             // Update the user agent.
1573             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
1574
1575             // Reload the current WebView.
1576             currentWebView.reload();
1577
1578             // Consume the event.
1579             return true;
1580         } else if (menuItemId == R.id.user_agent_firefox_on_windows) {  // User Agent - Firefox on Windows.
1581             // Update the user agent.
1582             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
1583
1584             // Reload the current WebView.
1585             currentWebView.reload();
1586
1587             // Consume the event.
1588             return true;
1589         } else if (menuItemId == R.id.user_agent_chrome_on_windows) {  // User Agent - Chrome on Windows.
1590             // Update the user agent.
1591             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
1592
1593             // Reload the current WebView.
1594             currentWebView.reload();
1595
1596             // Consume the event.
1597             return true;
1598         } else if (menuItemId == R.id.user_agent_edge_on_windows) {  // User Agent - Edge on Windows.
1599             // Update the user agent.
1600             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
1601
1602             // Reload the current WebView.
1603             currentWebView.reload();
1604
1605             // Consume the event.
1606             return true;
1607         } else if (menuItemId == R.id.user_agent_internet_explorer_on_windows) {  // User Agent - Internet Explorer on Windows.
1608             // Update the user agent.
1609             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
1610
1611             // Reload the current WebView.
1612             currentWebView.reload();
1613
1614             // Consume the event.
1615             return true;
1616         } else if (menuItemId == R.id.user_agent_safari_on_macos) {  // User Agent - Safari on macOS.
1617             // Update the user agent.
1618             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
1619
1620             // Reload the current WebView.
1621             currentWebView.reload();
1622
1623             // Consume the event.
1624             return true;
1625         } else if (menuItemId == R.id.user_agent_custom) {  // User Agent - Custom.
1626             // Update the user agent.
1627             currentWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
1628
1629             // Reload the current WebView.
1630             currentWebView.reload();
1631
1632             // Consume the event.
1633             return true;
1634         } else if (menuItemId == R.id.font_size) {  // Font size.
1635             // Instantiate the font size dialog.
1636             DialogFragment fontSizeDialogFragment = FontSizeDialog.displayDialog(currentWebView.getSettings().getTextZoom());
1637
1638             // Show the font size dialog.
1639             fontSizeDialogFragment.show(getSupportFragmentManager(), getString(R.string.font_size));
1640
1641             // Consume the event.
1642             return true;
1643         } else if (menuItemId == R.id.swipe_to_refresh) {  // Swipe to refresh.
1644             // Toggle the stored status of swipe to refresh.
1645             currentWebView.setSwipeToRefresh(!currentWebView.getSwipeToRefresh());
1646
1647             // Update the swipe refresh layout.
1648             if (currentWebView.getSwipeToRefresh()) {  // Swipe to refresh is enabled.
1649                 // Only enable the swipe refresh layout if the WebView is scrolled to the top.  It is updated every time the scroll changes.
1650                 swipeRefreshLayout.setEnabled(currentWebView.getScrollY() == 0);
1651             } else {  // Swipe to refresh is disabled.
1652                 // Disable the swipe refresh layout.
1653                 swipeRefreshLayout.setEnabled(false);
1654             }
1655
1656             // Consume the event.
1657             return true;
1658         } else if (menuItemId == R.id.wide_viewport) {  // Wide viewport.
1659             // Toggle the viewport.
1660             currentWebView.getSettings().setUseWideViewPort(!currentWebView.getSettings().getUseWideViewPort());
1661
1662             // Consume the event.
1663             return true;
1664         } else if (menuItemId == R.id.display_images) {  // Display images.
1665             // Toggle the displaying of images.
1666             if (currentWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
1667                 // Disable loading of images.
1668                 currentWebView.getSettings().setLoadsImagesAutomatically(false);
1669
1670                 // Reload the website to remove existing images.
1671                 currentWebView.reload();
1672             } else {  // Images are not currently loaded automatically.
1673                 // Enable loading of images.  Missing images will be loaded without the need for a reload.
1674                 currentWebView.getSettings().setLoadsImagesAutomatically(true);
1675             }
1676
1677             // Consume the event.
1678             return true;
1679         } else if (menuItemId == R.id.dark_webview) {  // Dark WebView.
1680             // Check to see if dark WebView is supported by this WebView.
1681             if (WebViewFeature.isFeatureSupported(WebViewFeature.FORCE_DARK)) {
1682                 // Toggle the dark WebView setting.
1683                 if (WebSettingsCompat.getForceDark(currentWebView.getSettings()) == WebSettingsCompat.FORCE_DARK_ON) {  // Dark WebView is currently enabled.
1684                     // Turn off dark WebView.
1685                     WebSettingsCompat.setForceDark(currentWebView.getSettings(), WebSettingsCompat.FORCE_DARK_OFF);
1686                 } else {  // Dark WebView is currently disabled.
1687                     // Turn on dark WebView.
1688                     WebSettingsCompat.setForceDark(currentWebView.getSettings(), WebSettingsCompat.FORCE_DARK_ON);
1689                 }
1690             }
1691
1692             // Consume the event.
1693             return true;
1694         } else if (menuItemId == R.id.find_on_page) {  // Find on page.
1695             // Get a handle for the views.
1696             Toolbar toolbar = findViewById(R.id.toolbar);
1697             LinearLayout findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
1698             EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
1699
1700             // Set the minimum height of the find on page linear layout to match the toolbar.
1701             findOnPageLinearLayout.setMinimumHeight(toolbar.getHeight());
1702
1703             // Hide the toolbar.
1704             toolbar.setVisibility(View.GONE);
1705
1706             // Show the find on page linear layout.
1707             findOnPageLinearLayout.setVisibility(View.VISIBLE);
1708
1709             // Display the keyboard.  The app must wait 200 ms before running the command to work around a bug in Android.
1710             // http://stackoverflow.com/questions/5520085/android-show-softkeyboard-with-showsoftinput-is-not-working
1711             findOnPageEditText.postDelayed(() -> {
1712                 // Set the focus on the find on page edit text.
1713                 findOnPageEditText.requestFocus();
1714
1715                 // Get a handle for the input method manager.
1716                 InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
1717
1718                 // Remove the lint warning below that the input method manager might be null.
1719                 assert inputMethodManager != null;
1720
1721                 // Display the keyboard.  `0` sets no input flags.
1722                 inputMethodManager.showSoftInput(findOnPageEditText, 0);
1723             }, 200);
1724
1725             // Consume the event.
1726             return true;
1727         } else if (menuItemId == R.id.print) {  // Print.
1728             // Get a print manager instance.
1729             PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
1730
1731             // Remove the lint error below that print manager might be null.
1732             assert printManager != null;
1733
1734             // Create a print document adapter from the current WebView.
1735             PrintDocumentAdapter printDocumentAdapter = currentWebView.createPrintDocumentAdapter();
1736
1737             // Print the document.
1738             printManager.print(getString(R.string.privacy_browser_webpage), printDocumentAdapter, null);
1739
1740             // Consume the event.
1741             return true;
1742         } else if (menuItemId == R.id.save_url) {  // Save URL.
1743             // Check the download preference.
1744             if (downloadWithExternalApp) {  // Download with an external app.
1745                 downloadUrlWithExternalApp(currentWebView.getCurrentUrl());
1746             } else {  // Handle the download inside of Privacy Browser.
1747                 // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
1748                 new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
1749                         currentWebView.getAcceptCookies()).execute(currentWebView.getCurrentUrl());
1750             }
1751
1752             // Consume the event.
1753             return true;
1754         } else if (menuItemId == R.id.save_archive) {
1755             // Instantiate the save dialog.
1756             DialogFragment saveArchiveFragment = SaveWebpageDialog.saveWebpage(SaveWebpageDialog.SAVE_ARCHIVE, currentWebView.getCurrentUrl(), null, null, null,
1757                     false);
1758
1759             // Show the save dialog.  It must be named `save_dialog` so that the file picker can update the file name.
1760             saveArchiveFragment.show(getSupportFragmentManager(), getString(R.string.save_dialog));
1761
1762             return true;
1763         } else if (menuItemId == R.id.save_image) {  // Save image.
1764             // Instantiate the save dialog.
1765             DialogFragment saveImageFragment = SaveWebpageDialog.saveWebpage(SaveWebpageDialog.SAVE_IMAGE, currentWebView.getCurrentUrl(), null, null, null,
1766                     false);
1767
1768             // Show the save dialog.  It must be named `save_dialog` so that the file picker can update the file name.
1769             saveImageFragment.show(getSupportFragmentManager(), getString(R.string.save_dialog));
1770
1771             // Consume the event.
1772             return true;
1773         } else if (menuItemId == R.id.add_to_homescreen) {  // Add to homescreen.
1774             // Instantiate the create home screen shortcut dialog.
1775             DialogFragment createHomeScreenShortcutDialogFragment = CreateHomeScreenShortcutDialog.createDialog(currentWebView.getTitle(), currentWebView.getUrl(),
1776                     currentWebView.getFavoriteOrDefaultIcon());
1777
1778             // Show the create home screen shortcut dialog.
1779             createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
1780
1781             // Consume the event.
1782             return true;
1783         } else if (menuItemId == R.id.view_source) {  // View source.
1784             // Create an intent to launch the view source activity.
1785             Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
1786
1787             // Add the variables to the intent.
1788             viewSourceIntent.putExtra(ViewSourceActivityKt.CURRENT_URL, currentWebView.getUrl());
1789             viewSourceIntent.putExtra(ViewSourceActivityKt.USER_AGENT, currentWebView.getSettings().getUserAgentString());
1790
1791             // Make it so.
1792             startActivity(viewSourceIntent);
1793
1794             // Consume the event.
1795             return true;
1796         } else if (menuItemId == R.id.share_url) {  // Share URL.
1797             // Setup the share string.
1798             String shareString = currentWebView.getTitle() + " – " + currentWebView.getUrl();
1799
1800             // Create the share intent.
1801             Intent shareIntent = new Intent(Intent.ACTION_SEND);
1802
1803             // Add the share string to the intent.
1804             shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
1805
1806             // Set the MIME type.
1807             shareIntent.setType("text/plain");
1808
1809             // Set the intent to open in a new task.
1810             shareIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1811
1812             // Make it so.
1813             startActivity(Intent.createChooser(shareIntent, getString(R.string.share_url)));
1814
1815             // Consume the event.
1816             return true;
1817         } else if (menuItemId == R.id.open_with_app) {  // Open with app.
1818             // Open the URL with an outside app.
1819             openWithApp(currentWebView.getUrl());
1820
1821             // Consume the event.
1822             return true;
1823         } else if (menuItemId == R.id.open_with_browser) {  // Open with browser.
1824             // Open the URL with an outside browser.
1825             openWithBrowser(currentWebView.getUrl());
1826
1827             // Consume the event.
1828             return true;
1829         } else if (menuItemId == R.id.add_or_edit_domain) {  // Add or edit domain.
1830             // Check if domain settings currently exist.
1831             if (currentWebView.getDomainSettingsApplied()) {  // Edit the current domain settings.
1832                 // Reapply the domain settings on returning to `MainWebViewActivity`.
1833                 reapplyDomainSettingsOnRestart = true;
1834
1835                 // Create an intent to launch the domains activity.
1836                 Intent domainsIntent = new Intent(this, DomainsActivity.class);
1837
1838                 // Add the extra information to the intent.
1839                 domainsIntent.putExtra("load_domain", currentWebView.getDomainSettingsDatabaseId());
1840                 domainsIntent.putExtra("close_on_back", true);
1841                 domainsIntent.putExtra("current_url", currentWebView.getUrl());
1842
1843                 // Get the current certificate.
1844                 SslCertificate sslCertificate = currentWebView.getCertificate();
1845
1846                 // Check to see if the SSL certificate is populated.
1847                 if (sslCertificate != null) {
1848                     // Extract the certificate to strings.
1849                     String issuedToCName = sslCertificate.getIssuedTo().getCName();
1850                     String issuedToOName = sslCertificate.getIssuedTo().getOName();
1851                     String issuedToUName = sslCertificate.getIssuedTo().getUName();
1852                     String issuedByCName = sslCertificate.getIssuedBy().getCName();
1853                     String issuedByOName = sslCertificate.getIssuedBy().getOName();
1854                     String issuedByUName = sslCertificate.getIssuedBy().getUName();
1855                     long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
1856                     long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
1857
1858                     // Add the certificate to the intent.
1859                     domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
1860                     domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
1861                     domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
1862                     domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
1863                     domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
1864                     domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
1865                     domainsIntent.putExtra("ssl_start_date", startDateLong);
1866                     domainsIntent.putExtra("ssl_end_date", endDateLong);
1867                 }
1868
1869                 // Check to see if the current IP addresses have been received.
1870                 if (currentWebView.hasCurrentIpAddresses()) {
1871                     // Add the current IP addresses to the intent.
1872                     domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
1873                 }
1874
1875                 // Make it so.
1876                 startActivity(domainsIntent);
1877             } else {  // Add a new domain.
1878                 // Apply the new domain settings on returning to `MainWebViewActivity`.
1879                 reapplyDomainSettingsOnRestart = true;
1880
1881                 // Get the current domain
1882                 Uri currentUri = Uri.parse(currentWebView.getUrl());
1883                 String currentDomain = currentUri.getHost();
1884
1885                 // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
1886                 DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
1887
1888                 // Create the domain and store the database ID.
1889                 int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
1890
1891                 // Create an intent to launch the domains activity.
1892                 Intent domainsIntent = new Intent(this, DomainsActivity.class);
1893
1894                 // Add the extra information to the intent.
1895                 domainsIntent.putExtra("load_domain", newDomainDatabaseId);
1896                 domainsIntent.putExtra("close_on_back", true);
1897                 domainsIntent.putExtra("current_url", currentWebView.getUrl());
1898
1899                 // Get the current certificate.
1900                 SslCertificate sslCertificate = currentWebView.getCertificate();
1901
1902                 // Check to see if the SSL certificate is populated.
1903                 if (sslCertificate != null) {
1904                     // Extract the certificate to strings.
1905                     String issuedToCName = sslCertificate.getIssuedTo().getCName();
1906                     String issuedToOName = sslCertificate.getIssuedTo().getOName();
1907                     String issuedToUName = sslCertificate.getIssuedTo().getUName();
1908                     String issuedByCName = sslCertificate.getIssuedBy().getCName();
1909                     String issuedByOName = sslCertificate.getIssuedBy().getOName();
1910                     String issuedByUName = sslCertificate.getIssuedBy().getUName();
1911                     long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
1912                     long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
1913
1914                     // Add the certificate to the intent.
1915                     domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
1916                     domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
1917                     domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
1918                     domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
1919                     domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
1920                     domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
1921                     domainsIntent.putExtra("ssl_start_date", startDateLong);
1922                     domainsIntent.putExtra("ssl_end_date", endDateLong);
1923                 }
1924
1925                 // Check to see if the current IP addresses have been received.
1926                 if (currentWebView.hasCurrentIpAddresses()) {
1927                     // Add the current IP addresses to the intent.
1928                     domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
1929                 }
1930
1931                 // Make it so.
1932                 startActivity(domainsIntent);
1933             }
1934
1935             // Consume the event.
1936             return true;
1937         } else if (menuItemId == R.id.ad_consent) {  // Ad consent.
1938             // Instantiate the ad consent dialog.
1939             DialogFragment adConsentDialogFragment = new AdConsentDialog();
1940
1941             // Display the ad consent dialog.
1942             adConsentDialogFragment.show(getSupportFragmentManager(), getString(R.string.ad_consent));
1943
1944             // Consume the event.
1945             return true;
1946         } else {  // There is no match with the options menu.  Pass the event up to the parent method.
1947             // Don't consume the event.
1948             return super.onOptionsItemSelected(menuItem);
1949         }
1950     }
1951
1952     // removeAllCookies is deprecated, but it is required for API < 21.
1953     @Override
1954     public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
1955         // Get a handle for the shared preferences.
1956         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
1957
1958         // Get the menu item ID.
1959         int menuItemId = menuItem.getItemId();
1960
1961         // Run the commands that correspond to the selected menu item.
1962         if (menuItemId == R.id.clear_and_exit) {  // Clear and exit.
1963             // Clear and exit Privacy Browser.
1964             clearAndExit();
1965         } else if (menuItemId == R.id.home) {  // Home.
1966             // Load the homepage.
1967             loadUrl(currentWebView, sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
1968         } else if (menuItemId == R.id.back) {  // Back.
1969             // Check if the WebView can go back.
1970             if (currentWebView.canGoBack()) {
1971                 // Get the current web back forward list.
1972                 WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
1973
1974                 // Get the previous entry URL.
1975                 String previousUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() - 1).getUrl();
1976
1977                 // Apply the domain settings.
1978                 applyDomainSettings(currentWebView, previousUrl, false, false, false);
1979
1980                 // Load the previous website in the history.
1981                 currentWebView.goBack();
1982             }
1983         } else if (menuItemId == R.id.forward) {  // Forward.
1984             // Check if the WebView can go forward.
1985             if (currentWebView.canGoForward()) {
1986                 // Get the current web back forward list.
1987                 WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
1988
1989                 // Get the next entry URL.
1990                 String nextUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() + 1).getUrl();
1991
1992                 // Apply the domain settings.
1993                 applyDomainSettings(currentWebView, nextUrl, false, false, false);
1994
1995                 // Load the next website in the history.
1996                 currentWebView.goForward();
1997             }
1998         } else if (menuItemId == R.id.history) {  // History.
1999             // Instantiate the URL history dialog.
2000             DialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(currentWebView.getWebViewFragmentId());
2001
2002             // Show the URL history dialog.
2003             urlHistoryDialogFragment.show(getSupportFragmentManager(), getString(R.string.history));
2004         } else if (menuItemId == R.id.open) {  // Open.
2005             // Instantiate the open file dialog.
2006             DialogFragment openDialogFragment = new OpenDialog();
2007
2008             // Show the open file dialog.
2009             openDialogFragment.show(getSupportFragmentManager(), getString(R.string.open));
2010         } else if (menuItemId == R.id.requests) {  // Requests.
2011             // Populate the resource requests.
2012             RequestsActivity.resourceRequests = currentWebView.getResourceRequests();
2013
2014             // Create an intent to launch the Requests activity.
2015             Intent requestsIntent = new Intent(this, RequestsActivity.class);
2016
2017             // Add the block third-party requests status to the intent.
2018             requestsIntent.putExtra("block_all_third_party_requests", currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
2019
2020             // Make it so.
2021             startActivity(requestsIntent);
2022         } else if (menuItemId == R.id.downloads) {  // Downloads.
2023             // Try the default system download manager.
2024             try {
2025                 // Launch the default system Download Manager.
2026                 Intent defaultDownloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
2027
2028                 // Launch as a new task so that the download manager and Privacy Browser show as separate windows in the recent tasks list.
2029                 defaultDownloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
2030
2031                 // Make it so.
2032                 startActivity(defaultDownloadManagerIntent);
2033             } catch (Exception defaultDownloadManagerException) {
2034                 // Try a generic file manager.
2035                 try {
2036                     // Create a generic file manager intent.
2037                     Intent genericFileManagerIntent = new Intent(Intent.ACTION_VIEW);
2038
2039                     // Open the download directory.
2040                     genericFileManagerIntent.setDataAndType(Uri.parse(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).toString()), DocumentsContract.Document.MIME_TYPE_DIR);
2041
2042                     // Launch as a new task so that the file manager and Privacy Browser show as separate windows in the recent tasks list.
2043                     genericFileManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
2044
2045                     // Make it so.
2046                     startActivity(genericFileManagerIntent);
2047                 } catch (Exception genericFileManagerException) {
2048                     // Try an alternate file manager.
2049                     try {
2050                         // Create an alternate file manager intent.
2051                         Intent alternateFileManagerIntent = new Intent(Intent.ACTION_VIEW);
2052
2053                         // Open the download directory.
2054                         alternateFileManagerIntent.setDataAndType(Uri.parse(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).toString()), "resource/folder");
2055
2056                         // Launch as a new task so that the file manager and Privacy Browser show as separate windows in the recent tasks list.
2057                         alternateFileManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
2058
2059                         // Open the alternate file manager.
2060                         startActivity(alternateFileManagerIntent);
2061                     } catch (Exception alternateFileManagerException) {
2062                         // Display a snackbar.
2063                         Snackbar.make(currentWebView, R.string.no_file_manager_detected, Snackbar.LENGTH_INDEFINITE).show();
2064                     }
2065                 }
2066             }
2067         } else if (menuItemId == R.id.domains) {  // Domains.
2068             // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
2069             reapplyDomainSettingsOnRestart = true;
2070
2071             // Launch the domains activity.
2072             Intent domainsIntent = new Intent(this, DomainsActivity.class);
2073
2074             // Add the extra information to the intent.
2075             domainsIntent.putExtra("current_url", currentWebView.getUrl());
2076
2077             // Get the current certificate.
2078             SslCertificate sslCertificate = currentWebView.getCertificate();
2079
2080             // Check to see if the SSL certificate is populated.
2081             if (sslCertificate != null) {
2082                 // Extract the certificate to strings.
2083                 String issuedToCName = sslCertificate.getIssuedTo().getCName();
2084                 String issuedToOName = sslCertificate.getIssuedTo().getOName();
2085                 String issuedToUName = sslCertificate.getIssuedTo().getUName();
2086                 String issuedByCName = sslCertificate.getIssuedBy().getCName();
2087                 String issuedByOName = sslCertificate.getIssuedBy().getOName();
2088                 String issuedByUName = sslCertificate.getIssuedBy().getUName();
2089                 long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
2090                 long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
2091
2092                 // Add the certificate to the intent.
2093                 domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
2094                 domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
2095                 domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
2096                 domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
2097                 domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
2098                 domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
2099                 domainsIntent.putExtra("ssl_start_date", startDateLong);
2100                 domainsIntent.putExtra("ssl_end_date", endDateLong);
2101             }
2102
2103             // Check to see if the current IP addresses have been received.
2104             if (currentWebView.hasCurrentIpAddresses()) {
2105                 // Add the current IP addresses to the intent.
2106                 domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
2107             }
2108
2109             // Make it so.
2110             startActivity(domainsIntent);
2111         } else if (menuItemId == R.id.settings) {  // Settings.
2112             // Set the flag to reapply app settings on restart when returning from Settings.
2113             reapplyAppSettingsOnRestart = true;
2114
2115             // Set the flag to reapply the domain settings on restart when returning from Settings.
2116             reapplyDomainSettingsOnRestart = true;
2117
2118             // Launch the settings activity.
2119             Intent settingsIntent = new Intent(this, SettingsActivity.class);
2120             startActivity(settingsIntent);
2121         } else if (menuItemId == R.id.import_export) { // Import/Export.
2122             // Create an intent to launch the import/export activity.
2123             Intent importExportIntent = new Intent(this, ImportExportActivity.class);
2124
2125             // Make it so.
2126             startActivity(importExportIntent);
2127         } else if (menuItemId == R.id.logcat) {  // Logcat.
2128             // Create an intent to launch the logcat activity.
2129             Intent logcatIntent = new Intent(this, LogcatActivity.class);
2130
2131             // Make it so.
2132             startActivity(logcatIntent);
2133         } else if (menuItemId == R.id.guide) {  // Guide.
2134             // Create an intent to launch the guide activity.
2135             Intent guideIntent = new Intent(this, GuideActivity.class);
2136
2137             // Make it so.
2138             startActivity(guideIntent);
2139         } else if (menuItemId == R.id.about) {  // About
2140             // Create an intent to launch the about activity.
2141             Intent aboutIntent = new Intent(this, AboutActivity.class);
2142
2143             // Create a string array for the blocklist versions.
2144             String[] blocklistVersions = new String[]{easyList.get(0).get(0)[0], easyPrivacy.get(0).get(0)[0], fanboysAnnoyanceList.get(0).get(0)[0], fanboysSocialList.get(0).get(0)[0],
2145                     ultraList.get(0).get(0)[0], ultraPrivacy.get(0).get(0)[0]};
2146
2147             // Add the blocklist versions to the intent.
2148             aboutIntent.putExtra(AboutActivity.BLOCKLIST_VERSIONS, blocklistVersions);
2149
2150             // Make it so.
2151             startActivity(aboutIntent);
2152         }
2153
2154         // Close the navigation drawer.
2155         drawerLayout.closeDrawer(GravityCompat.START);
2156         return true;
2157     }
2158
2159     @Override
2160     public void onPostCreate(Bundle savedInstanceState) {
2161         // Run the default commands.
2162         super.onPostCreate(savedInstanceState);
2163
2164         // Sync the state of the DrawerToggle after the default `onRestoreInstanceState()` has finished.  This creates the navigation drawer icon.
2165         actionBarDrawerToggle.syncState();
2166     }
2167
2168     @Override
2169     public void onConfigurationChanged(@NonNull Configuration newConfig) {
2170         // Run the default commands.
2171         super.onConfigurationChanged(newConfig);
2172
2173         // Reload the ad for the free flavor if not in full screen mode.
2174         if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
2175             // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
2176             View adView = findViewById(R.id.adview);
2177
2178             // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
2179             // `getContext()` can be used instead of `getActivity.getApplicationContext()` once the minimum API >= 23.
2180             AdHelper.loadAd(adView, getApplicationContext(), this, getString(R.string.ad_unit_id));
2181         }
2182
2183         // `invalidateOptionsMenu` should recalculate the number of action buttons from the menu to display on the app bar, but it doesn't because of the this bug:
2184         // https://code.google.com/p/android/issues/detail?id=20493#c8
2185         // ActivityCompat.invalidateOptionsMenu(this);
2186     }
2187
2188     @Override
2189     public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
2190         // Get the hit test result.
2191         final WebView.HitTestResult hitTestResult = currentWebView.getHitTestResult();
2192
2193         // Define the URL strings.
2194         final String imageUrl;
2195         final String linkUrl;
2196
2197         // Get handles for the system managers.
2198         final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
2199
2200         // Remove the lint errors below that the clipboard manager might be null.
2201         assert clipboardManager != null;
2202
2203         // Process the link according to the type.
2204         switch (hitTestResult.getType()) {
2205             // `SRC_ANCHOR_TYPE` is a link.
2206             case WebView.HitTestResult.SRC_ANCHOR_TYPE:
2207                 // Get the target URL.
2208                 linkUrl = hitTestResult.getExtra();
2209
2210                 // Set the target URL as the title of the `ContextMenu`.
2211                 menu.setHeaderTitle(linkUrl);
2212
2213                 // Add an Open in New Tab entry.
2214                 menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2215                     // Load the link URL in a new tab and move to it.
2216                     addNewTab(linkUrl, true);
2217
2218                     // Consume the event.
2219                     return true;
2220                 });
2221
2222                 // Add an Open in Background entry.
2223                 menu.add(R.string.open_in_background).setOnMenuItemClickListener((MenuItem item) -> {
2224                     // Load the link URL in a new tab but do not move to it.
2225                     addNewTab(linkUrl, false);
2226
2227                     // Consume the event.
2228                     return true;
2229                 });
2230
2231                 // Add an Open with App entry.
2232                 menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
2233                     openWithApp(linkUrl);
2234
2235                     // Consume the event.
2236                     return true;
2237                 });
2238
2239                 // Add an Open with Browser entry.
2240                 menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
2241                     openWithBrowser(linkUrl);
2242
2243                     // Consume the event.
2244                     return true;
2245                 });
2246
2247                 // Add a Copy URL entry.
2248                 menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
2249                     // Save the link URL in a `ClipData`.
2250                     ClipData srcAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), linkUrl);
2251
2252                     // Set the `ClipData` as the clipboard's primary clip.
2253                     clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
2254
2255                     // Consume the event.
2256                     return true;
2257                 });
2258
2259                 // Add a Save URL entry.
2260                 menu.add(R.string.save_url).setOnMenuItemClickListener((MenuItem item) -> {
2261                     // Check the download preference.
2262                     if (downloadWithExternalApp) {  // Download with an external app.
2263                         downloadUrlWithExternalApp(linkUrl);
2264                     } else {  // Handle the download inside of Privacy Browser.
2265                         // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
2266                         new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
2267                                 currentWebView.getAcceptCookies()).execute(linkUrl);
2268                     }
2269
2270                     // Consume the event.
2271                     return true;
2272                 });
2273
2274                 // Add an empty Cancel entry, which by default closes the context menu.
2275                 menu.add(R.string.cancel);
2276                 break;
2277
2278             // `IMAGE_TYPE` is an image.
2279             case WebView.HitTestResult.IMAGE_TYPE:
2280                 // Get the image URL.
2281                 imageUrl = hitTestResult.getExtra();
2282
2283                 // Remove the incorrect lint warning below that the image URL might be null.
2284                 assert imageUrl != null;
2285
2286                 // Set the context menu title.
2287                 if (imageUrl.startsWith("data:")) {  // The image data is contained in within the URL, making it exceedingly long.
2288                     // Truncate the image URL before making it the title.
2289                     menu.setHeaderTitle(imageUrl.substring(0, 100));
2290                 } else {  // The image URL does not contain the full image data.
2291                     // Set the image URL as the title of the context menu.
2292                     menu.setHeaderTitle(imageUrl);
2293                 }
2294
2295                 // Add an Open in New Tab entry.
2296                 menu.add(R.string.open_image_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2297                     // Load the image in a new tab.
2298                     addNewTab(imageUrl, true);
2299
2300                     // Consume the event.
2301                     return true;
2302                 });
2303
2304                 // Add an Open with App entry.
2305                 menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
2306                     // Open the image URL with an external app.
2307                     openWithApp(imageUrl);
2308
2309                     // Consume the event.
2310                     return true;
2311                 });
2312
2313                 // Add an Open with Browser entry.
2314                 menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
2315                     // Open the image URL with an external browser.
2316                     openWithBrowser(imageUrl);
2317
2318                     // Consume the event.
2319                     return true;
2320                 });
2321
2322                 // Add a View Image entry.
2323                 menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
2324                     // Load the image in the current tab.
2325                     loadUrl(currentWebView, imageUrl);
2326
2327                     // Consume the event.
2328                     return true;
2329                 });
2330
2331                 // Add a Save Image entry.
2332                 menu.add(R.string.save_image).setOnMenuItemClickListener((MenuItem item) -> {
2333                     // Check the download preference.
2334                     if (downloadWithExternalApp) {  // Download with an external app.
2335                         downloadUrlWithExternalApp(imageUrl);
2336                     } else {  // Handle the download inside of Privacy Browser.
2337                         // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
2338                         new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
2339                                 currentWebView.getAcceptCookies()).execute(imageUrl);
2340                     }
2341
2342                     // Consume the event.
2343                     return true;
2344                 });
2345
2346                 // Add a Copy URL entry.
2347                 menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
2348                     // Save the image URL in a clip data.
2349                     ClipData imageTypeClipData = ClipData.newPlainText(getString(R.string.url), imageUrl);
2350
2351                     // Set the clip data as the clipboard's primary clip.
2352                     clipboardManager.setPrimaryClip(imageTypeClipData);
2353
2354                     // Consume the event.
2355                     return true;
2356                 });
2357
2358                 // Add an empty Cancel entry, which by default closes the context menu.
2359                 menu.add(R.string.cancel);
2360                 break;
2361
2362             // `SRC_IMAGE_ANCHOR_TYPE` is an image that is also a link.
2363             case WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE:
2364                 // Get the image URL.
2365                 imageUrl = hitTestResult.getExtra();
2366
2367                 // Instantiate a handler.
2368                 Handler handler = new Handler();
2369
2370                 // Get a message from the handler.
2371                 Message message = handler.obtainMessage();
2372
2373                 // Request the image details from the last touched node be returned in the message.
2374                 currentWebView.requestFocusNodeHref(message);
2375
2376                 // Get the link URL from the message data.
2377                 linkUrl = message.getData().getString("url");
2378
2379                 // Set the link URL as the title of the context menu.
2380                 menu.setHeaderTitle(linkUrl);
2381
2382                 // Add an Open in New Tab entry.
2383                 menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2384                     // Load the link URL in a new tab and move to it.
2385                     addNewTab(linkUrl, true);
2386
2387                     // Consume the event.
2388                     return true;
2389                 });
2390
2391                 // Add an Open in Background entry.
2392                 menu.add(R.string.open_in_background).setOnMenuItemClickListener((MenuItem item) -> {
2393                     // Lod the link URL in a new tab but do not move to it.
2394                     addNewTab(linkUrl, false);
2395
2396                     // Consume the event.
2397                     return true;
2398                 });
2399
2400                 // Add an Open Image in New Tab entry.
2401                 menu.add(R.string.open_image_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2402                     // Load the image in a new tab and move to it.
2403                     addNewTab(imageUrl, true);
2404
2405                     // Consume the event.
2406                     return true;
2407                 });
2408
2409                 // Add an Open with App entry.
2410                 menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
2411                     // Open the link URL with an external app.
2412                     openWithApp(linkUrl);
2413
2414                     // Consume the event.
2415                     return true;
2416                 });
2417
2418                 // Add an Open with Browser entry.
2419                 menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
2420                     // Open the link URL with an external browser.
2421                     openWithBrowser(linkUrl);
2422
2423                     // Consume the event.
2424                     return true;
2425                 });
2426
2427                 // Add a View Image entry.
2428                 menu.add(R.string.view_image).setOnMenuItemClickListener((MenuItem item) -> {
2429                    // View the image in the current tab.
2430                    loadUrl(currentWebView, imageUrl);
2431
2432                    // Consume the event.
2433                    return true;
2434                 });
2435
2436                 // Add a Save Image entry.
2437                 menu.add(R.string.save_image).setOnMenuItemClickListener((MenuItem item) -> {
2438                     // Check the download preference.
2439                     if (downloadWithExternalApp) {  // Download with an external app.
2440                         downloadUrlWithExternalApp(imageUrl);
2441                     } else {  // Handle the download inside of Privacy Browser.
2442                         // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
2443                         new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
2444                                 currentWebView.getAcceptCookies()).execute(imageUrl);
2445                     }
2446
2447                     // Consume the event.
2448                     return true;
2449                 });
2450
2451                 // Add a Copy URL entry.
2452                 menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
2453                     // Save the link URL in a clip data.
2454                     ClipData srcImageAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), linkUrl);
2455
2456                     // Set the clip data as the clipboard's primary clip.
2457                     clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
2458
2459                     // Consume the event.
2460                     return true;
2461                 });
2462
2463                 // Add a Save URL entry.
2464                 menu.add(R.string.save_url).setOnMenuItemClickListener((MenuItem item) -> {
2465                     // Check the download preference.
2466                     if (downloadWithExternalApp) {  // Download with an external app.
2467                         downloadUrlWithExternalApp(linkUrl);
2468                     } else {  // Handle the download inside of Privacy Browser.
2469                         // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
2470                         new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
2471                                 currentWebView.getAcceptCookies()).execute(linkUrl);
2472                     }
2473
2474                     // Consume the event.
2475                     return true;
2476                 });
2477
2478                 // Add an empty Cancel entry, which by default closes the context menu.
2479                 menu.add(R.string.cancel);
2480                 break;
2481
2482             case WebView.HitTestResult.EMAIL_TYPE:
2483                 // Get the target URL.
2484                 linkUrl = hitTestResult.getExtra();
2485
2486                 // Set the target URL as the title of the `ContextMenu`.
2487                 menu.setHeaderTitle(linkUrl);
2488
2489                 // Add a Write Email entry.
2490                 menu.add(R.string.write_email).setOnMenuItemClickListener(item -> {
2491                     // Use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
2492                     Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
2493
2494                     // Parse the url and set it as the data for the `Intent`.
2495                     emailIntent.setData(Uri.parse("mailto:" + linkUrl));
2496
2497                     // `FLAG_ACTIVITY_NEW_TASK` opens the email program in a new task instead as part of Privacy Browser.
2498                     emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
2499
2500                     try {
2501                         // Make it so.
2502                         startActivity(emailIntent);
2503                     } catch (ActivityNotFoundException exception) {
2504                         // Display a snackbar.
2505                         Snackbar.make(currentWebView, getString(R.string.error) + "  " + exception, Snackbar.LENGTH_INDEFINITE).show();
2506                     }
2507
2508                     // Consume the event.
2509                     return true;
2510                 });
2511
2512                 // Add a Copy Email Address entry.
2513                 menu.add(R.string.copy_email_address).setOnMenuItemClickListener(item -> {
2514                     // Save the email address in a `ClipData`.
2515                     ClipData srcEmailTypeClipData = ClipData.newPlainText(getString(R.string.email_address), linkUrl);
2516
2517                     // Set the `ClipData` as the clipboard's primary clip.
2518                     clipboardManager.setPrimaryClip(srcEmailTypeClipData);
2519
2520                     // Consume the event.
2521                     return true;
2522                 });
2523
2524                 // Add an empty Cancel entry, which by default closes the context menu.
2525                 menu.add(R.string.cancel);
2526                 break;
2527         }
2528     }
2529
2530     @Override
2531     public void onCreateBookmark(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
2532         // Get a handle for the bookmarks list view.
2533         ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
2534
2535         // Get the dialog.
2536         Dialog dialog = dialogFragment.getDialog();
2537
2538         // Remove the incorrect lint warning below that the dialog might be null.
2539         assert dialog != null;
2540
2541         // Get the views from the dialog fragment.
2542         EditText createBookmarkNameEditText = dialog.findViewById(R.id.create_bookmark_name_edittext);
2543         EditText createBookmarkUrlEditText = dialog.findViewById(R.id.create_bookmark_url_edittext);
2544
2545         // Extract the strings from the edit texts.
2546         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
2547         String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
2548
2549         // Create a favorite icon byte array output stream.
2550         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
2551
2552         // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2553         favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
2554
2555         // Convert the favorite icon byte array stream to a byte array.
2556         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
2557
2558         // Display the new bookmark below the current items in the (0 indexed) list.
2559         int newBookmarkDisplayOrder = bookmarksListView.getCount();
2560
2561         // Create the bookmark.
2562         bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
2563
2564         // Update the bookmarks cursor with the current contents of this folder.
2565         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
2566
2567         // Update the list view.
2568         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
2569
2570         // Scroll to the new bookmark.
2571         bookmarksListView.setSelection(newBookmarkDisplayOrder);
2572     }
2573
2574     @Override
2575     public void onCreateBookmarkFolder(DialogFragment dialogFragment, @NonNull Bitmap favoriteIconBitmap) {
2576         // Get a handle for the bookmarks list view.
2577         ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
2578
2579         // Get the dialog.
2580         Dialog dialog = dialogFragment.getDialog();
2581
2582         // Remove the incorrect lint warning below that the dialog might be null.
2583         assert dialog != null;
2584
2585         // Get handles for the views in the dialog fragment.
2586         EditText folderNameEditText = dialog.findViewById(R.id.folder_name_edittext);
2587         RadioButton defaultIconRadioButton = dialog.findViewById(R.id.default_icon_radiobutton);
2588         ImageView defaultIconImageView = dialog.findViewById(R.id.default_icon_imageview);
2589
2590         // Get new folder name string.
2591         String folderNameString = folderNameEditText.getText().toString();
2592
2593         // Create a folder icon bitmap.
2594         Bitmap folderIconBitmap;
2595
2596         // Set the folder icon bitmap according to the dialog.
2597         if (defaultIconRadioButton.isChecked()) {  // Use the default folder icon.
2598             // Get the default folder icon drawable.
2599             Drawable folderIconDrawable = defaultIconImageView.getDrawable();
2600
2601             // Convert the folder icon drawable to a bitmap drawable.
2602             BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
2603
2604             // Convert the folder icon bitmap drawable to a bitmap.
2605             folderIconBitmap = folderIconBitmapDrawable.getBitmap();
2606         } else {  // Use the WebView favorite icon.
2607             // Copy the favorite icon bitmap to the folder icon bitmap.
2608             folderIconBitmap = favoriteIconBitmap;
2609         }
2610
2611         // Create a folder icon byte array output stream.
2612         ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
2613
2614         // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2615         folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
2616
2617         // Convert the folder icon byte array stream to a byte array.
2618         byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
2619
2620         // Move all the bookmarks down one in the display order.
2621         for (int i = 0; i < bookmarksListView.getCount(); i++) {
2622             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
2623             bookmarksDatabaseHelper.updateDisplayOrder(databaseId, i + 1);
2624         }
2625
2626         // Create the folder, which will be placed at the top of the `ListView`.
2627         bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
2628