Handle `file://` and `content://` URLs. https://redmine.stoutner.com/issues/360...
[PrivacyBrowser.git] / app / src / main / java / com / stoutner / privacybrowser / activities / MainWebViewActivity.java
1 /*
2  * Copyright © 2015-2018 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.Manifest;
25 import android.annotation.SuppressLint;
26 import android.app.Activity;
27 import android.app.DialogFragment;
28 import android.app.DownloadManager;
29 import android.app.SearchManager;
30 import android.content.ActivityNotFoundException;
31 import android.content.BroadcastReceiver;
32 import android.content.ClipData;
33 import android.content.ClipboardManager;
34 import android.content.Context;
35 import android.content.Intent;
36 import android.content.IntentFilter;
37 import android.content.SharedPreferences;
38 import android.content.pm.PackageManager;
39 import android.content.res.Configuration;
40 import android.content.res.Resources;
41 import android.database.Cursor;
42 import android.graphics.Bitmap;
43 import android.graphics.BitmapFactory;
44 import android.graphics.Typeface;
45 import android.graphics.drawable.BitmapDrawable;
46 import android.graphics.drawable.Drawable;
47 import android.net.Uri;
48 import android.net.http.SslCertificate;
49 import android.net.http.SslError;
50 import android.os.Build;
51 import android.os.Bundle;
52 import android.os.Environment;
53 import android.os.Handler;
54 import android.preference.PreferenceManager;
55 import android.print.PrintDocumentAdapter;
56 import android.print.PrintManager;
57 import android.support.annotation.NonNull;
58 import android.support.design.widget.CoordinatorLayout;
59 import android.support.design.widget.FloatingActionButton;
60 import android.support.design.widget.NavigationView;
61 import android.support.design.widget.Snackbar;
62 import android.support.v4.app.ActivityCompat;
63 import android.support.v4.content.ContextCompat;
64 // `ShortcutInfoCompat`, `ShortcutManagerCompat`, and `IconCompat` can be switched to the non-compat version once API >= 26.
65 import android.support.v4.content.pm.ShortcutInfoCompat;
66 import android.support.v4.content.pm.ShortcutManagerCompat;
67 import android.support.v4.graphics.drawable.IconCompat;
68 import android.support.v4.view.GravityCompat;
69 import android.support.v4.widget.DrawerLayout;
70 import android.support.v4.widget.SwipeRefreshLayout;
71 import android.support.v7.app.ActionBar;
72 import android.support.v7.app.ActionBarDrawerToggle;
73 import android.support.v7.app.AppCompatActivity;
74 import android.support.v7.app.AppCompatDialogFragment;
75 import android.support.v7.widget.Toolbar;
76 import android.text.Editable;
77 import android.text.Spanned;
78 import android.text.TextWatcher;
79 import android.text.style.ForegroundColorSpan;
80 import android.util.Patterns;
81 import android.view.ContextMenu;
82 import android.view.GestureDetector;
83 import android.view.KeyEvent;
84 import android.view.Menu;
85 import android.view.MenuItem;
86 import android.view.MotionEvent;
87 import android.view.View;
88 import android.view.ViewGroup;
89 import android.view.WindowManager;
90 import android.view.inputmethod.InputMethodManager;
91 import android.webkit.CookieManager;
92 import android.webkit.HttpAuthHandler;
93 import android.webkit.SslErrorHandler;
94 import android.webkit.ValueCallback;
95 import android.webkit.WebBackForwardList;
96 import android.webkit.WebChromeClient;
97 import android.webkit.WebResourceResponse;
98 import android.webkit.WebStorage;
99 import android.webkit.WebView;
100 import android.webkit.WebViewClient;
101 import android.webkit.WebViewDatabase;
102 import android.widget.ArrayAdapter;
103 import android.widget.CursorAdapter;
104 import android.widget.EditText;
105 import android.widget.FrameLayout;
106 import android.widget.ImageView;
107 import android.widget.LinearLayout;
108 import android.widget.ListView;
109 import android.widget.ProgressBar;
110 import android.widget.RadioButton;
111 import android.widget.RelativeLayout;
112 import android.widget.TextView;
113
114 import com.stoutner.privacybrowser.BuildConfig;
115 import com.stoutner.privacybrowser.R;
116 import com.stoutner.privacybrowser.dialogs.AdConsentDialog;
117 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
118 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
119 import com.stoutner.privacybrowser.dialogs.CreateHomeScreenShortcutDialog;
120 import com.stoutner.privacybrowser.dialogs.DownloadImageDialog;
121 import com.stoutner.privacybrowser.dialogs.DownloadLocationPermissionDialog;
122 import com.stoutner.privacybrowser.dialogs.EditBookmarkDialog;
123 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
124 import com.stoutner.privacybrowser.dialogs.HttpAuthenticationDialog;
125 import com.stoutner.privacybrowser.dialogs.PinnedSslCertificateMismatchDialog;
126 import com.stoutner.privacybrowser.dialogs.UrlHistoryDialog;
127 import com.stoutner.privacybrowser.dialogs.ViewSslCertificateDialog;
128 import com.stoutner.privacybrowser.helpers.AdHelper;
129 import com.stoutner.privacybrowser.helpers.BlockListHelper;
130 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
131 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
132 import com.stoutner.privacybrowser.helpers.OrbotProxyHelper;
133 import com.stoutner.privacybrowser.dialogs.DownloadFileDialog;
134 import com.stoutner.privacybrowser.dialogs.SslCertificateErrorDialog;
135
136 import java.io.ByteArrayInputStream;
137 import java.io.ByteArrayOutputStream;
138 import java.io.File;
139 import java.io.IOException;
140 import java.io.UnsupportedEncodingException;
141 import java.net.MalformedURLException;
142 import java.net.URL;
143 import java.net.URLDecoder;
144 import java.net.URLEncoder;
145 import java.util.ArrayList;
146 import java.util.Date;
147 import java.util.HashMap;
148 import java.util.HashSet;
149 import java.util.List;
150 import java.util.Map;
151 import java.util.Set;
152
153 // AppCompatActivity from android.support.v7.app.AppCompatActivity must be used to have access to the SupportActionBar until the minimum API is >= 21.
154 public class MainWebViewActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener,
155         CreateHomeScreenShortcutDialog.CreateHomeScreenShortcutListener, DownloadFileDialog.DownloadFileListener, DownloadImageDialog.DownloadImageListener,
156         DownloadLocationPermissionDialog.DownloadLocationPermissionDialogListener, EditBookmarkDialog.EditBookmarkListener, EditBookmarkFolderDialog.EditBookmarkFolderListener,
157         HttpAuthenticationDialog.HttpAuthenticationListener, NavigationView.OnNavigationItemSelectedListener, PinnedSslCertificateMismatchDialog.PinnedSslCertificateMismatchListener,
158         SslCertificateErrorDialog.SslCertificateErrorListener, UrlHistoryDialog.UrlHistoryListener {
159
160     // `darkTheme` is public static so it can be accessed from everywhere.
161     public static boolean darkTheme;
162
163     // `allowScreenshots` is public static so it can be accessed from everywhere.  It is also used in `onCreate()`.
164     public static boolean allowScreenshots;
165
166     // `favoriteIconBitmap` is public static so it can be accessed from `CreateHomeScreenShortcutDialog`, `BookmarksActivity`, `BookmarksDatabaseViewActivity`, `CreateBookmarkDialog`,
167     // `CreateBookmarkFolderDialog`, `EditBookmarkDialog`, `EditBookmarkFolderDialog`, `EditBookmarkDatabaseViewDialog`, and `ViewSslCertificateDialog`.  It is also used in `onCreate()`,
168     // `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onCreateHomeScreenShortcutCreate()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `applyDomainSettings()`.
169     public static Bitmap favoriteIconBitmap;
170
171     // `formattedUrlString` is public static so it can be accessed from `BookmarksActivity`, `CreateBookmarkDialog`, and `AddDomainDialog`.
172     // It is also used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onCreateHomeScreenShortcutCreate()`, `loadUrlFromTextBox()`, and `applyProxyThroughOrbot()`.
173     public static String formattedUrlString;
174
175     // `sslCertificate` is public static so it can be accessed from `DomainsActivity`, `DomainsListFragment`, `DomainSettingsFragment`, `PinnedSslCertificateMismatchDialog`,
176     // and `ViewSslCertificateDialog`.  It is also used in `onCreate()`.
177     public static SslCertificate sslCertificate;
178
179     // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()`, `onResume()`, and `applyProxyThroughOrbot()`.
180     public static String orbotStatus;
181
182     // `webViewTitle` is public static so it can be accessed from `CreateBookmarkDialog` and `CreateHomeScreenShortcutDialog`.  It is also used in `onCreate()`.
183     public static String webViewTitle;
184
185     // `appliedUserAgentString` is public static so it can be accessed from `ViewSourceActivity`.  It is also used in `applyDomainSettings()`.
186     public static String appliedUserAgentString;
187
188     // `reloadOnRestart` is public static so it can be accessed from `SettingsFragment`.  It is also used in `onRestart()`
189     public static boolean reloadOnRestart;
190
191     // `reloadUrlOnRestart` is public static so it can be accessed from `SettingsFragment` and `BookmarksActivity`.  It is also used in `onRestart()`.
192     public static boolean loadUrlOnRestart;
193
194     // `restartFromBookmarksActivity` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onRestart()`.
195     public static boolean restartFromBookmarksActivity;
196
197     // The block list versions are public static so they can be accessed from `AboutTabFragment`.  They are also used in `onCreate()`.
198     public static String easyListVersion;
199     public static String easyPrivacyVersion;
200     public static String fanboysAnnoyanceVersion;
201     public static String fanboysSocialVersion;
202     public static String ultraPrivacyVersion;
203
204     // The request items are public static so they can be accessed by `BlockListHelper`, `RequestsArrayAdapter`, and `ViewRequestsDialog`.  They are also used in `onCreate()` and `onPrepareOptionsMenu()`.
205     public static List<String[]> resourceRequests;
206     public static String[] whiteListResultStringArray;
207     private int blockedRequests;
208     private int easyListBlockedRequests;
209     private int easyPrivacyBlockedRequests;
210     private int fanboysAnnoyanceListBlockedRequests;
211     private int fanboysSocialBlockingListBlockedRequests;
212     private int ultraPrivacyBlockedRequests;
213     private int thirdPartyBlockedRequests;
214
215     public final static int REQUEST_DISPOSITION = 0;
216     public final static int REQUEST_URL = 1;
217     public final static int REQUEST_BLOCKLIST = 2;
218     public final static int REQUEST_SUBLIST = 3;
219     public final static int REQUEST_BLOCKLIST_ENTRIES = 4;
220     public final static int REQUEST_BLOCKLIST_ORIGINAL_ENTRY = 5;
221
222     public final static int REQUEST_DEFAULT = 0;
223     public final static int REQUEST_ALLOWED = 1;
224     public final static int REQUEST_THIRD_PARTY = 2;
225     public final static int REQUEST_BLOCKED = 3;
226
227     public final static int MAIN_WHITELIST = 1;
228     public final static int FINAL_WHITELIST = 2;
229     public final static int DOMAIN_WHITELIST = 3;
230     public final static int DOMAIN_INITIAL_WHITELIST = 4;
231     public final static int DOMAIN_FINAL_WHITELIST = 5;
232     public final static int THIRD_PARTY_WHITELIST = 6;
233     public final static int THIRD_PARTY_DOMAIN_WHITELIST = 7;
234     public final static int THIRD_PARTY_DOMAIN_INITIAL_WHITELIST = 8;
235
236     public final static int MAIN_BLACKLIST = 9;
237     public final static int INITIAL_BLACKLIST = 10;
238     public final static int FINAL_BLACKLIST = 11;
239     public final static int DOMAIN_BLACKLIST = 12;
240     public final static int DOMAIN_INITIAL_BLACKLIST = 13;
241     public final static int DOMAIN_FINAL_BLACKLIST = 14;
242     public final static int DOMAIN_REGULAR_EXPRESSION_BLACKLIST = 15;
243     public final static int THIRD_PARTY_BLACKLIST = 16;
244     public final static int THIRD_PARTY_INITIAL_BLACKLIST = 17;
245     public final static int THIRD_PARTY_DOMAIN_BLACKLIST = 18;
246     public final static int THIRD_PARTY_DOMAIN_INITIAL_BLACKLIST = 19;
247     public final static int THIRD_PARTY_REGULAR_EXPRESSION_BLACKLIST = 20;
248     public final static int THIRD_PARTY_DOMAIN_REGULAR_EXPRESSION_BLACKLIST = 21;
249     public final static int REGULAR_EXPRESSION_BLACKLIST = 22;
250
251     // `blockAllThirdPartyRequests` is public static so it can be accessed from `RequestsActivity`.
252     // It is also used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`
253     public static boolean blockAllThirdPartyRequests;
254
255     // `currentBookmarksFolder` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onCreate()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`,
256     // `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
257     public static String currentBookmarksFolder;
258
259     // `domainSettingsDatabaseId` is public static so it can be accessed from `PinnedSslCertificateMismatchDialog`.  It is also used in `onCreate()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
260     public static int domainSettingsDatabaseId;
261
262     // The pinned domain SSL Certificate variables are public static so they can be accessed from `PinnedSslCertificateMismatchDialog`.  They are also used in `onCreate()` and `applyDomainSettings()`.
263     public static String pinnedDomainSslIssuedToCNameString;
264     public static String pinnedDomainSslIssuedToONameString;
265     public static String pinnedDomainSslIssuedToUNameString;
266     public static String pinnedDomainSslIssuedByCNameString;
267     public static String pinnedDomainSslIssuedByONameString;
268     public static String pinnedDomainSslIssuedByUNameString;
269     public static Date pinnedDomainSslStartDate;
270     public static Date pinnedDomainSslEndDate;
271
272     // The user agent constants are public static so they can be accessed from `SettingsFragment`, `DomainsActivity`, and `DomainSettingsFragment`.
273     public final static int UNRECOGNIZED_USER_AGENT = -1;
274     public final static int SETTINGS_WEBVIEW_DEFAULT_USER_AGENT = 1;
275     public final static int SETTINGS_CUSTOM_USER_AGENT = 12;
276     public final static int DOMAINS_SYSTEM_DEFAULT_USER_AGENT = 0;
277     public final static int DOMAINS_WEBVIEW_DEFAULT_USER_AGENT = 2;
278     public final static int DOMAINS_CUSTOM_USER_AGENT = 13;
279
280
281     // `appBar` is used in `onCreate()`, `onOptionsItemSelected()`, `closeFindOnPage()`, `applyAppSettings()`, and `applyProxyThroughOrbot()`.
282     private ActionBar appBar;
283
284     // `navigatingHistory` is used in `onCreate()`, `onNavigationItemSelected()`, `onSslMismatchBack()`, and `applyDomainSettings()`.
285     private boolean navigatingHistory;
286
287     // `favoriteIconDefaultBitmap` is used in `onCreate()` and `applyDomainSettings`.
288     private Bitmap favoriteIconDefaultBitmap;
289
290     // `drawerLayout` is used in `onCreate()`, `onNewIntent()`, `onBackPressed()`, and `onRestart()`.
291     private DrawerLayout drawerLayout;
292
293     // `rootCoordinatorLayout` is used in `onCreate()` and `applyAppSettings()`.
294     private CoordinatorLayout rootCoordinatorLayout;
295
296     // `mainWebView` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`,
297     // `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`, `onSslMismatchBack()`, and `applyProxyThroughOrbot()`.
298     private WebView mainWebView;
299
300     // `fullScreenVideoFrameLayout` is used in `onCreate()` and `onConfigurationChanged()`.
301     private FrameLayout fullScreenVideoFrameLayout;
302
303     // `swipeRefreshLayout` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `onRestart()`.
304     private SwipeRefreshLayout swipeRefreshLayout;
305
306     // `urlAppBarRelativeLayout` is used in `onCreate()` and `applyDomainSettings()`.
307     private RelativeLayout urlAppBarRelativeLayout;
308
309     // `favoriteIconImageView` is used in `onCreate()` and `applyDomainSettings()`
310     private ImageView favoriteIconImageView;
311
312     // `cookieManager` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`, `loadUrlFromTextBox()`, `onDownloadImage()`, `onDownloadFile()`, and `onRestart()`.
313     private CookieManager cookieManager;
314
315     // `customHeader` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateContextMenu()`, and `loadUrl()`.
316     private final Map<String, String> customHeaders = new HashMap<>();
317
318     // `javaScriptEnabled` is also used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `applyDomainSettings()`, and `updatePrivacyIcons()`.
319     private boolean javaScriptEnabled;
320
321     // `firstPartyCookiesEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onDownloadImage()`, `onDownloadFile()`, and `applyDomainSettings()`.
322     private boolean firstPartyCookiesEnabled;
323
324     // `thirdPartyCookiesEnabled` used in `onCreate()`, `onPrepareOptionsMenu()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
325     private boolean thirdPartyCookiesEnabled;
326
327     // `domStorageEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
328     private boolean domStorageEnabled;
329
330     // `saveFormDataEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.  It can be removed once the minimum API >= 26.
331     private boolean saveFormDataEnabled;
332
333     // `nightMode` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and  `applyDomainSettings()`.
334     private boolean nightMode;
335
336     // 'homepage' is used in `onCreate()`, `onNavigationItemSelected()`, and `applyProxyThroughOrbot()`.
337     private String homepage;
338
339     // `searchURL` is used in `loadURLFromTextBox()` and `applyProxyThroughOrbot()`.
340     private String searchURL;
341
342     // `mainMenu` is used in `onCreateOptionsMenu()` and `updatePrivacyIcons()`.
343     private Menu mainMenu;
344
345     // `refreshMenuItem` is used in `onCreate()` and `onCreateOptionsMenu()`.
346     private MenuItem refreshMenuItem;
347
348     // The blocklist menu items are used in `onCreate()`, `onCreateOptionsMenu()`, and `onPrepareOptionsMenu()`.
349     private MenuItem blocklistsMenuItem;
350     private MenuItem easyListMenuItem;
351     private MenuItem easyPrivacyMenuItem;
352     private MenuItem fanboysAnnoyanceListMenuItem;
353     private MenuItem fanboysSocialBlockingListMenuItem;
354     private MenuItem ultraPrivacyMenuItem;
355     private MenuItem blockAllThirdPartyRequestsMenuItem;
356
357     // The blocklist variables are used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
358     private boolean easyListEnabled;
359     private boolean easyPrivacyEnabled;
360     private boolean fanboysAnnoyanceListEnabled;
361     private boolean fanboysSocialBlockingListEnabled;
362     private boolean ultraPrivacyEnabled;
363
364     // `webViewDefaultUserAgent` is used in `onCreate()` and `onPrepareOptionsMenu()`.
365     private String webViewDefaultUserAgent;
366
367     // `defaultCustomUserAgentString` is used in `onPrepareOptionsMenu()` and `applyDomainSettings()`.
368     private String defaultCustomUserAgentString;
369
370     // `privacyBrowserRuntime` is used in `onCreate()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
371     private Runtime privacyBrowserRuntime;
372
373     // `proxyThroughOrbot` is used in `onRestart()`, `onOptionsItemSelected()`, `applyAppSettings()`, and `applyProxyThroughOrbot()`.
374     private boolean proxyThroughOrbot;
375
376     // `incognitoModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
377     private boolean incognitoModeEnabled;
378
379     // `fullScreenBrowsingModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
380     private boolean fullScreenBrowsingModeEnabled;
381
382     // `inFullScreenBrowsingMode` is used in `onCreate()`, `onConfigurationChanged()`, and `applyAppSettings()`.
383     private boolean inFullScreenBrowsingMode;
384
385     // `hideSystemBarsOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
386     private boolean hideSystemBarsOnFullscreen;
387
388     // `translucentNavigationBarOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
389     private boolean translucentNavigationBarOnFullscreen;
390
391     // `reapplyDomainSettingsOnRestart` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, and `onAddDomain()`, .
392     private boolean reapplyDomainSettingsOnRestart;
393
394     // `reapplyAppSettingsOnRestart` is used in `onNavigationItemSelected()` and `onRestart()`.
395     private boolean reapplyAppSettingsOnRestart;
396
397     // `displayingFullScreenVideo` is used in `onCreate()` and `onResume()`.
398     private boolean displayingFullScreenVideo;
399
400     // `downloadWithExternalApp` is used in `onCreate()`, `onCreateContextMenu()`, and `applyDomainSettings()`.
401     private boolean downloadWithExternalApp;
402
403     // `currentDomainName` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onAddDomain()`, and `applyDomainSettings()`.
404     private String currentDomainName;
405
406     // `ignorePinnedSslCertificateForDomain` is used in `onCreate()`, `onSslMismatchProceed()`, and `applyDomainSettings()`.
407     private boolean ignorePinnedSslCertificate;
408
409     // `orbotStatusBroadcastReceiver` is used in `onCreate()` and `onDestroy()`.
410     private BroadcastReceiver orbotStatusBroadcastReceiver;
411
412     // `waitingForOrbot` is used in `onCreate()`, `onResume()`, and `applyProxyThroughOrbot()`.
413     private boolean waitingForOrbot;
414
415     // `domainSettingsApplied` is used in `prepareOptionsMenu()` and `applyDomainSettings()`.
416     private boolean domainSettingsApplied;
417
418     // `domainSettingsJavaScriptEnabled` is used in `onOptionsItemSelected()` and `applyDomainSettings()`.
419     private Boolean domainSettingsJavaScriptEnabled;
420
421     // `waitingForOrbotHtmlString` is used in `onCreate()` and `applyProxyThroughOrbot()`.
422     private String waitingForOrbotHtmlString;
423
424     // `privateDataDirectoryString` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`.
425     private String privateDataDirectoryString;
426
427     // `findOnPageLinearLayout` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
428     private LinearLayout findOnPageLinearLayout;
429
430     // `findOnPageEditText` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
431     private EditText findOnPageEditText;
432
433     // `displayAdditionalAppBarIcons` is used in `onCreate()` and `onCreateOptionsMenu()`.
434     private boolean displayAdditionalAppBarIcons;
435
436     // `drawerToggle` is used in `onCreate()`, `onPostCreate()`, `onConfigurationChanged()`, `onNewIntent()`, and `onNavigationItemSelected()`.
437     private ActionBarDrawerToggle drawerToggle;
438
439     // `supportAppBar` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
440     private Toolbar supportAppBar;
441
442     // `urlTextBox` is used in `onCreate()`, `onOptionsItemSelected()`, `loadUrlFromTextBox()`, `loadUrl()`, and `highlightUrlText()`.
443     private EditText urlTextBox;
444
445     // The color spans are used in `onCreate()` and `highlightUrlText()`.
446     private ForegroundColorSpan redColorSpan;
447     private ForegroundColorSpan initialGrayColorSpan;
448     private ForegroundColorSpan finalGrayColorSpan;
449
450     // `sslErrorHandler` is used in `onCreate()`, `onSslErrorCancel()`, and `onSslErrorProceed`.
451     private SslErrorHandler sslErrorHandler;
452
453     // `httpAuthHandler` is used in `onCreate()`, `onHttpAuthenticationCancel()`, and `onHttpAuthenticationProceed()`.
454     private static HttpAuthHandler httpAuthHandler;
455
456     // `inputMethodManager` is used in `onOptionsItemSelected()`, `loadUrlFromTextBox()`, and `closeFindOnPage()`.
457     private InputMethodManager inputMethodManager;
458
459     // `mainWebViewRelativeLayout` is used in `onCreate()` and `onNavigationItemSelected()`.
460     private RelativeLayout mainWebViewRelativeLayout;
461
462     // `urlIsLoading` is used in `onCreate()`, `onCreateOptionsMenu()`, `loadUrl()`, and `applyDomainSettings()`.
463     private boolean urlIsLoading;
464
465     // `pinnedDomainSslCertificate` is used in `onCreate()` and `applyDomainSettings()`.
466     private boolean pinnedDomainSslCertificate;
467
468     // `bookmarksDatabaseHelper` is used in `onCreate()`, `onDestroy`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`,
469     // and `loadBookmarksFolder()`.
470     private BookmarksDatabaseHelper bookmarksDatabaseHelper;
471
472     // `bookmarksListView` is used in `onCreate()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, and `loadBookmarksFolder()`.
473     private ListView bookmarksListView;
474
475     // `bookmarksTitleTextView` is used in `onCreate()` and `loadBookmarksFolder()`.
476     private TextView bookmarksTitleTextView;
477
478     // `bookmarksCursor` is used in `onDestroy()`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
479     private Cursor bookmarksCursor;
480
481     // `bookmarksCursorAdapter` is used in `onCreateBookmark()`, `onCreateBookmarkFolder()` `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
482     private CursorAdapter bookmarksCursorAdapter;
483
484     // `oldFolderNameString` is used in `onCreate()` and `onSaveEditBookmarkFolder()`.
485     private String oldFolderNameString;
486
487     // `fileChooserCallback` is used in `onCreate()` and `onActivityResult()`.
488     private ValueCallback<Uri[]> fileChooserCallback;
489
490     // The download strings are used in `onCreate()` and `onRequestPermissionResult()`.
491     private String downloadUrl;
492     private String downloadContentDisposition;
493     private long downloadContentLength;
494
495     // `downloadImageUrl` is used in `onCreateContextMenu()` and `onRequestPermissionResult()`.
496     private String downloadImageUrl;
497
498     // The user agent variables are used in `onCreate()` and `applyDomainSettings()`.
499     private ArrayAdapter<CharSequence> userAgentNamesArray;
500     private String[] userAgentDataArray;
501
502     // The request codes are used in `onCreate()`, `onCreateContextMenu()`, `onCloseDownloadLocationPermissionDialog()`, and `onRequestPermissionResult()`.
503     private final int DOWNLOAD_FILE_REQUEST_CODE = 1;
504     private final int DOWNLOAD_IMAGE_REQUEST_CODE = 2;
505
506     @Override
507     // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.  The whole premise of Privacy Browser is built around an understanding of these dangers.
508     // Also, remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
509     @SuppressLint({"SetJavaScriptEnabled", "ClickableViewAccessibility"})
510     // Remove Android Studio's warning about deprecations.  The deprecated `getColor()` must be used until API >= 23.
511     @SuppressWarnings("deprecation")
512     protected void onCreate(Bundle savedInstanceState) {
513         // Get a handle for the shared preferences.
514         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
515
516         // Get the theme and screenshot preferences.
517         darkTheme = sharedPreferences.getBoolean("dark_theme", false);
518         allowScreenshots = sharedPreferences.getBoolean("allow_screenshots", false);
519
520         // Disable screenshots if not allowed.
521         if (!allowScreenshots) {
522             getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
523         }
524
525         // Set the activity theme.
526         if (darkTheme) {
527             setTheme(R.style.PrivacyBrowserDark);
528         } else {
529             setTheme(R.style.PrivacyBrowserLight);
530         }
531
532         // Run the default commands.
533         super.onCreate(savedInstanceState);
534
535         // Set the content view.
536         setContentView(R.layout.main_drawerlayout);
537
538         // Get a handle for the resources.
539         Resources resources = getResources();
540
541         // Get a handle for `inputMethodManager`.
542         inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
543
544         // `SupportActionBar` from `android.support.v7.app.ActionBar` must be used until the minimum API is >= 21.
545         supportAppBar = findViewById(R.id.app_bar);
546         setSupportActionBar(supportAppBar);
547         appBar = getSupportActionBar();
548
549         // This is needed to get rid of the Android Studio warning that `appBar` might be null.
550         assert appBar != null;
551
552         // Add the custom `url_app_bar` layout, which shows the favorite icon and the URL text bar.
553         appBar.setCustomView(R.layout.url_app_bar);
554         appBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
555
556         // Initialize the foreground color spans for highlighting the URLs.  We have to use the deprecated `getColor()` until API >= 23.
557         redColorSpan = new ForegroundColorSpan(resources.getColor(R.color.red_a700));
558         initialGrayColorSpan = new ForegroundColorSpan(resources.getColor(R.color.gray_500));
559         finalGrayColorSpan = new ForegroundColorSpan(resources.getColor(R.color.gray_500));
560
561         // Get a handle for `urlTextBox`.
562         urlTextBox = findViewById(R.id.url_edittext);
563
564         // Remove the formatting from `urlTextBar` when the user is editing the text.
565         urlTextBox.setOnFocusChangeListener((View v, boolean hasFocus) -> {
566             if (hasFocus) {  // The user is editing the URL text box.
567                 // Remove the highlighting.
568                 urlTextBox.getText().removeSpan(redColorSpan);
569                 urlTextBox.getText().removeSpan(initialGrayColorSpan);
570                 urlTextBox.getText().removeSpan(finalGrayColorSpan);
571             } else {  // The user has stopped editing the URL text box.
572                 // Move to the beginning of the string.
573                 urlTextBox.setSelection(0);
574
575                 // Reapply the highlighting.
576                 highlightUrlText();
577             }
578         });
579
580         // Set the go button on the keyboard to load the URL in `urlTextBox`.
581         urlTextBox.setOnKeyListener((View v, int keyCode, KeyEvent event) -> {
582             // If the event is a key-down event on the `enter` button, load the URL.
583             if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {
584                 // Load the URL into the mainWebView and consume the event.
585                 loadUrlFromTextBox();
586
587                 // If the enter key was pressed, consume the event.
588                 return true;
589             } else {
590                 // If any other key was pressed, do not consume the event.
591                 return false;
592             }
593         });
594
595         // Set `waitingForOrbotHTMLString`.
596         waitingForOrbotHtmlString = "<html><body><br/><center><h1>" + getString(R.string.waiting_for_orbot) + "</h1></center></body></html>";
597
598         // Initialize `currentDomainName`, `orbotStatus`, and `waitingForOrbot`.
599         currentDomainName = "";
600         orbotStatus = "unknown";
601         waitingForOrbot = false;
602
603         // Create an Orbot status `BroadcastReceiver`.
604         orbotStatusBroadcastReceiver = new BroadcastReceiver() {
605             @Override
606             public void onReceive(Context context, Intent intent) {
607                 // Store the content of the status message in `orbotStatus`.
608                 orbotStatus = intent.getStringExtra("org.torproject.android.intent.extra.STATUS");
609
610                 // If Privacy Browser is waiting on Orbot, load the website now that Orbot is connected.
611                 if (orbotStatus.equals("ON") && waitingForOrbot) {
612                     // Reset `waitingForOrbot`.
613                     waitingForOrbot = false;
614
615                     // Load `formattedUrlString
616                     loadUrl(formattedUrlString);
617                 }
618             }
619         };
620
621         // Register `orbotStatusBroadcastReceiver` on `this` context.
622         this.registerReceiver(orbotStatusBroadcastReceiver, new IntentFilter("org.torproject.android.intent.action.STATUS"));
623
624         // Get handles for views that need to be accessed.
625         drawerLayout = findViewById(R.id.drawerlayout);
626         rootCoordinatorLayout = findViewById(R.id.root_coordinatorlayout);
627         bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
628         bookmarksTitleTextView = findViewById(R.id.bookmarks_title_textview);
629         FloatingActionButton launchBookmarksActivityFab = findViewById(R.id.launch_bookmarks_activity_fab);
630         FloatingActionButton createBookmarkFolderFab = findViewById(R.id.create_bookmark_folder_fab);
631         FloatingActionButton createBookmarkFab = findViewById(R.id.create_bookmark_fab);
632         mainWebViewRelativeLayout = findViewById(R.id.main_webview_relativelayout);
633         mainWebView = findViewById(R.id.main_webview);
634         findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
635         findOnPageEditText = findViewById(R.id.find_on_page_edittext);
636         fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
637         urlAppBarRelativeLayout = findViewById(R.id.url_app_bar_relativelayout);
638         favoriteIconImageView = findViewById(R.id.favorite_icon);
639
640         // Set the bookmarks drawer resources according to the theme.  This can't be done in the layout due to compatibility issues with the `DrawerLayout` support widget.
641         if (darkTheme) {
642             launchBookmarksActivityFab.setImageDrawable(resources.getDrawable(R.drawable.bookmarks_dark));
643             createBookmarkFolderFab.setImageDrawable(resources.getDrawable(R.drawable.create_folder_dark));
644             createBookmarkFab.setImageDrawable(resources.getDrawable(R.drawable.create_bookmark_dark));
645             bookmarksListView.setBackgroundColor(resources.getColor(R.color.gray_850));
646         } else {
647             launchBookmarksActivityFab.setImageDrawable(resources.getDrawable(R.drawable.bookmarks_light));
648             createBookmarkFolderFab.setImageDrawable(resources.getDrawable(R.drawable.create_folder_light));
649             createBookmarkFab.setImageDrawable(resources.getDrawable(R.drawable.create_bookmark_light));
650             bookmarksListView.setBackgroundColor(resources.getColor(R.color.white));
651         }
652
653         // Set the launch bookmarks activity FAB to launch the bookmarks activity.
654         launchBookmarksActivityFab.setOnClickListener(v -> {
655             // Create an intent to launch the bookmarks activity.
656             Intent bookmarksIntent = new Intent(getApplicationContext(), BookmarksActivity.class);
657
658             // Include the current folder with the `Intent`.
659             bookmarksIntent.putExtra("Current Folder", currentBookmarksFolder);
660
661             // Make it so.
662             startActivity(bookmarksIntent);
663         });
664
665         // Set the create new bookmark folder FAB to display an alert dialog.
666         createBookmarkFolderFab.setOnClickListener(v -> {
667             // Show the `CreateBookmarkFolderDialog` `AlertDialog` and name the instance `@string/create_folder`.
668             AppCompatDialogFragment createBookmarkFolderDialog = new CreateBookmarkFolderDialog();
669             createBookmarkFolderDialog.show(getSupportFragmentManager(), resources.getString(R.string.create_folder));
670         });
671
672         // Set the create new bookmark FAB to display an alert dialog.
673         createBookmarkFab.setOnClickListener(view -> {
674             // Show the `CreateBookmarkDialog` `AlertDialog` and name the instance `@string/create_bookmark`.
675             AppCompatDialogFragment createBookmarkDialog = new CreateBookmarkDialog();
676             createBookmarkDialog.show(getSupportFragmentManager(), resources.getString(R.string.create_bookmark));
677         });
678
679         // Create a double-tap listener to toggle full-screen mode.
680         final GestureDetector gestureDetector = new GestureDetector(this, new GestureDetector.SimpleOnGestureListener() {
681             // Override `onDoubleTap()`.  All other events are handled using the default settings.
682             @Override
683             public boolean onDoubleTap(MotionEvent event) {
684                 if (fullScreenBrowsingModeEnabled) {  // Only process the double-tap if full screen browsing mode is enabled.
685                     // Toggle `inFullScreenBrowsingMode`.
686                     inFullScreenBrowsingMode = !inFullScreenBrowsingMode;
687
688                     if (inFullScreenBrowsingMode) {  // Switch to full screen mode.
689                         // Hide the `appBar`.
690                         appBar.hide();
691
692                         // Hide the banner ad in the free flavor.
693                         if (BuildConfig.FLAVOR.contentEquals("free")) {
694                             // The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
695                             AdHelper.hideAd(findViewById(R.id.adview));
696                         }
697
698                         // Modify the system bars.
699                         if (hideSystemBarsOnFullscreen) {  // Hide everything.
700                             // Remove the translucent overlays.
701                             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
702
703                             // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
704                             drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
705
706                             /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
707                              * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
708                              * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
709                              */
710                             rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
711
712                             // Set `rootCoordinatorLayout` to fill the whole screen.
713                             rootCoordinatorLayout.setFitsSystemWindows(false);
714                         } else {  // Hide everything except the status and navigation bars.
715                             // Set `rootCoordinatorLayout` to fit under the status and navigation bars.
716                             rootCoordinatorLayout.setFitsSystemWindows(false);
717
718                             // There is an Android Support Library bug that causes a scrim to print on the right side of the `Drawer Layout` when the navigation bar is displayed on the right of the screen.
719                             if (translucentNavigationBarOnFullscreen) {
720                                 // Set the navigation bar to be translucent.
721                                 getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
722                             }
723                         }
724                     } else {  // Switch to normal viewing mode.
725                         // Show the `appBar`.
726                         appBar.show();
727
728                         // Show the `BannerAd` in the free flavor.
729                         if (BuildConfig.FLAVOR.contentEquals("free")) {
730                             // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
731                             AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
732                         }
733
734                         // Remove the translucent navigation bar flag if it is set.
735                         getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
736
737                         // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
738                         getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
739
740                         // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
741                         rootCoordinatorLayout.setSystemUiVisibility(0);
742
743                         // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
744                         rootCoordinatorLayout.setFitsSystemWindows(true);
745                     }
746
747                     // Consume the double-tap.
748                     return true;
749                 } else { // Do not consume the double-tap because full screen browsing mode is disabled.
750                     return false;
751                 }
752             }
753         });
754
755         // Pass all touch events on `mainWebView` through `gestureDetector` to check for double-taps.
756         mainWebView.setOnTouchListener((View v, MotionEvent event) -> {
757             // Call `performClick()` on the view, which is required for accessibility.
758             v.performClick();
759
760             // Send the `event` to `gestureDetector`.
761             return gestureDetector.onTouchEvent(event);
762         });
763
764         // Update `findOnPageCountTextView`.
765         mainWebView.setFindListener(new WebView.FindListener() {
766             // Get a handle for `findOnPageCountTextView`.
767             final TextView findOnPageCountTextView = (TextView) findViewById(R.id.find_on_page_count_textview);
768
769             @Override
770             public void onFindResultReceived(int activeMatchOrdinal, int numberOfMatches, boolean isDoneCounting) {
771                 if ((isDoneCounting) && (numberOfMatches == 0)) {  // There are no matches.
772                     // Set `findOnPageCountTextView` to `0/0`.
773                     findOnPageCountTextView.setText(R.string.zero_of_zero);
774                 } else if (isDoneCounting) {  // There are matches.
775                     // `activeMatchOrdinal` is zero-based.
776                     int activeMatch = activeMatchOrdinal + 1;
777
778                     // Build the match string.
779                     String matchString = activeMatch + "/" + numberOfMatches;
780
781                     // Set `findOnPageCountTextView`.
782                     findOnPageCountTextView.setText(matchString);
783                 }
784             }
785         });
786
787         // Search for the string on the page whenever a character changes in the `findOnPageEditText`.
788         findOnPageEditText.addTextChangedListener(new TextWatcher() {
789             @Override
790             public void beforeTextChanged(CharSequence s, int start, int count, int after) {
791                 // Do nothing.
792             }
793
794             @Override
795             public void onTextChanged(CharSequence s, int start, int before, int count) {
796                 // Do nothing.
797             }
798
799             @Override
800             public void afterTextChanged(Editable s) {
801                 // Search for the text in `mainWebView`.
802                 mainWebView.findAllAsync(findOnPageEditText.getText().toString());
803             }
804         });
805
806         // Set the `check mark` button for the `findOnPageEditText` keyboard to close the soft keyboard.
807         findOnPageEditText.setOnKeyListener((v, keyCode, event) -> {
808             if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {  // The `enter` key was pressed.
809                 // Hide the soft keyboard.  `0` indicates no additional flags.
810                 inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
811
812                 // Consume the event.
813                 return true;
814             } else {  // A different key was pressed.
815                 // Do not consume the event.
816                 return false;
817             }
818         });
819
820         // Implement swipe to refresh.
821         swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
822         swipeRefreshLayout.setOnRefreshListener(() -> mainWebView.reload());
823
824         // Set the swipe to refresh color according to the theme.
825         if (darkTheme) {
826             swipeRefreshLayout.setColorSchemeResources(R.color.blue_600);
827             swipeRefreshLayout.setProgressBackgroundColorSchemeResource(R.color.gray_850);
828         } else {
829             swipeRefreshLayout.setColorSchemeResources(R.color.blue_700);
830         }
831
832         // `DrawerTitle` identifies the `DrawerLayouts` in accessibility mode.
833         drawerLayout.setDrawerTitle(GravityCompat.START, getString(R.string.navigation_drawer));
834         drawerLayout.setDrawerTitle(GravityCompat.END, getString(R.string.bookmarks));
835
836         // Listen for touches on the navigation menu.
837         final NavigationView navigationView = findViewById(R.id.navigationview);
838         navigationView.setNavigationItemSelectedListener(this);
839
840         // Get handles for `navigationMenu` and the back and forward menu items.  The menu is zero-based, so items 1, 2, and 3 are the second, third, and fourth entries in the menu.
841         final Menu navigationMenu = navigationView.getMenu();
842         final MenuItem navigationBackMenuItem = navigationMenu.getItem(1);
843         final MenuItem navigationForwardMenuItem = navigationMenu.getItem(2);
844         final MenuItem navigationHistoryMenuItem = navigationMenu.getItem(3);
845         final MenuItem navigationRequestsMenuItem = navigationMenu.getItem(4);
846
847         // Initialize the bookmarks database helper.  `this` specifies the context.  The two `nulls` do not specify the database name or a `CursorFactory`.
848         // The `0` specifies a database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
849         bookmarksDatabaseHelper = new BookmarksDatabaseHelper(this, null, null, 0);
850
851         // Initialize `currentBookmarksFolder`.  `""` is the home folder in the database.
852         currentBookmarksFolder = "";
853
854         // Load the home folder, which is `""` in the database.
855         loadBookmarksFolder();
856
857         bookmarksListView.setOnItemClickListener((parent, view, position, id) -> {
858             // Convert the id from long to int to match the format of the bookmarks database.
859             int databaseID = (int) id;
860
861             // Get the bookmark cursor for this ID and move it to the first row.
862             Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmarkCursor(databaseID);
863             bookmarkCursor.moveToFirst();
864
865             // Act upon the bookmark according to the type.
866             if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {  // The selected bookmark is a folder.
867                 // Store the new folder name in `currentBookmarksFolder`.
868                 currentBookmarksFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
869
870                 // Load the new folder.
871                 loadBookmarksFolder();
872             } else {  // The selected bookmark is not a folder.
873                 // Load the bookmark URL.
874                 loadUrl(bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL)));
875
876                 // Close the bookmarks drawer.
877                 drawerLayout.closeDrawer(GravityCompat.END);
878             }
879
880             // Close the `Cursor`.
881             bookmarkCursor.close();
882         });
883
884         bookmarksListView.setOnItemLongClickListener((parent, view, position, id) -> {
885             // Convert the database ID from `long` to `int`.
886             int databaseId = (int) id;
887
888             // Find out if the selected bookmark is a folder.
889             boolean isFolder = bookmarksDatabaseHelper.isFolder(databaseId);
890
891             if (isFolder) {
892                 // Save the current folder name, which is used in `onSaveEditBookmarkFolder()`.
893                 oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
894
895                 // Show the edit bookmark folder `AlertDialog` and name the instance `@string/edit_folder`.
896                 AppCompatDialogFragment editFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId);
897                 editFolderDialog.show(getSupportFragmentManager(), resources.getString(R.string.edit_folder));
898             } else {
899                 // Show the edit bookmark `AlertDialog` and name the instance `@string/edit_bookmark`.
900                 AppCompatDialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId);
901                 editBookmarkDialog.show(getSupportFragmentManager(), resources.getString(R.string.edit_bookmark));
902             }
903
904             // Consume the event.
905             return true;
906         });
907
908         // Get the status bar pixel size.
909         int statusBarResourceId = resources.getIdentifier("status_bar_height", "dimen", "android");
910         int statusBarPixelSize = resources.getDimensionPixelSize(statusBarResourceId);
911
912         // Get the resource density.
913         float screenDensity = resources.getDisplayMetrics().density;
914
915         // Calculate the drawer header padding.  This is used to move the text in the drawer headers below any cutouts.
916         int drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
917         int drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
918         int drawerHeaderPaddingBottom = (int) (8 * screenDensity);
919
920         // The drawer listener is used to update the navigation menu.
921         drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
922             @Override
923             public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
924             }
925
926             @Override
927             public void onDrawerOpened(@NonNull View drawerView) {
928             }
929
930             @Override
931             public void onDrawerClosed(@NonNull View drawerView) {
932             }
933
934             @Override
935             public void onDrawerStateChanged(int newState) {
936                 if ((newState == DrawerLayout.STATE_SETTLING) || (newState == DrawerLayout.STATE_DRAGGING)) {  // A drawer is opening or closing.
937                     // Get handles for the drawer headers.
938                     TextView navigationHeaderTextView = findViewById(R.id.navigationText);
939                     TextView bookmarksHeaderTextView = findViewById(R.id.bookmarks_title_textview);
940
941                     // Apply the calculated drawer paddings.  This moves the text in the header below any cutouts.
942                     navigationHeaderTextView.setPadding(drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingTop, drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingBottom);
943                     bookmarksHeaderTextView.setPadding(drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingTop, drawerHeaderPaddingLeftAndRight, drawerHeaderPaddingBottom);
944
945                     // Update the back, forward, history, and requests menu items.
946                     navigationBackMenuItem.setEnabled(mainWebView.canGoBack());
947                     navigationForwardMenuItem.setEnabled(mainWebView.canGoForward());
948                     navigationHistoryMenuItem.setEnabled((mainWebView.canGoBack() || mainWebView.canGoForward()));
949                     navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
950
951                     // Hide the keyboard (if displayed).
952                     inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
953
954                     // Clear the focus from from the URL text box and the WebView.  This removes any text selection markers and context menus, which otherwise draw above the open drawers.
955                     urlTextBox.clearFocus();
956                     mainWebView.clearFocus();
957                 }
958             }
959         });
960
961         // drawerToggle creates the hamburger icon at the start of the AppBar.
962         drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, supportAppBar, R.string.open_navigation_drawer, R.string.close_navigation_drawer);
963
964         // Get a handle for the progress bar.
965         final ProgressBar progressBar = findViewById(R.id.progress_bar);
966
967         mainWebView.setWebChromeClient(new WebChromeClient() {
968             // Update the progress bar when a page is loading.
969             @Override
970             public void onProgressChanged(WebView view, int progress) {
971                 // Inject the night mode CSS if night mode is enabled.
972                 if (nightMode) {
973                     // `background-color: #212121` sets the background to be dark gray.  `color: #BDBDBD` sets the text color to be light gray.  `box-shadow: none` removes a lower underline on links
974                     // used by WordPress.  `text-decoration: none` removes all text underlines.  `text-shadow: none` removes text shadows, which usually have a hard coded color.
975                     // `border: none` removes all borders, which can also be used to underline text.
976                     // `a {color: #1565C0}` sets links to be a dark blue.  `!important` takes precedent over any existing sub-settings.
977                     mainWebView.evaluateJavascript("(function() {var parent = document.getElementsByTagName('head').item(0); var style = document.createElement('style'); style.type = 'text/css'; " +
978                             "style.innerHTML = '* {background-color: #212121 !important; color: #BDBDBD !important; box-shadow: none !important; text-decoration: none !important;" +
979                             "text-shadow: none !important; border: none !important;} a {color: #1565C0 !important;}'; parent.appendChild(style)})()", value -> {
980                                 // Initialize a handler to display `mainWebView`.
981                                 Handler displayWebViewHandler = new Handler();
982
983                                 // Setup a runnable to display `mainWebView` after a delay to allow the CSS to be applied.
984                                 Runnable displayWebViewRunnable = () -> {
985                                     // Only display `mainWebView` if the progress bar is one.  This prevents the display of the `WebView` while it is still loading.
986                                     if (progressBar.getVisibility() == View.GONE) {
987                                         mainWebView.setVisibility(View.VISIBLE);
988                                     }
989                                 };
990
991                                 // Displaying of `mainWebView` after 500 milliseconds.
992                                 displayWebViewHandler.postDelayed(displayWebViewRunnable, 500);
993                             });
994                 }
995
996                 // Update the progress bar.
997                 progressBar.setProgress(progress);
998
999                 // Set the visibility of the progress bar.
1000                 if (progress < 100) {
1001                     // Show the progress bar.
1002                     progressBar.setVisibility(View.VISIBLE);
1003                 } else {
1004                     // Hide the progress bar.
1005                     progressBar.setVisibility(View.GONE);
1006
1007                     // Display `mainWebView` if night mode is disabled.
1008                     // Because of a race condition between `applyDomainSettings` and `onPageStarted`, when night mode is set by domain settings the `WebView` may be hidden even if night mode is not
1009                     // currently enabled.
1010                     if (!nightMode) {
1011                         mainWebView.setVisibility(View.VISIBLE);
1012                     }
1013
1014                     //Stop the swipe to refresh indicator if it is running
1015                     swipeRefreshLayout.setRefreshing(false);
1016                 }
1017             }
1018
1019             // Set the favorite icon when it changes.
1020             @Override
1021             public void onReceivedIcon(WebView view, Bitmap icon) {
1022                 // Only update the favorite icon if the website has finished loading.
1023                 if (progressBar.getVisibility() == View.GONE) {
1024                     // Save a copy of the favorite icon.
1025                     favoriteIconBitmap = icon;
1026
1027                     // Place the favorite icon in the appBar.
1028                     favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
1029                 }
1030             }
1031
1032             // Save a copy of the title when it changes.
1033             @Override
1034             public void onReceivedTitle(WebView view, String title) {
1035                 // Save a copy of the title.
1036                 webViewTitle = title;
1037             }
1038
1039             // Enter full screen video.
1040             @Override
1041             public void onShowCustomView(View view, CustomViewCallback callback) {
1042                 // Set the full screen video flag.
1043                 displayingFullScreenVideo = true;
1044
1045                 // Pause the ad if this is the free flavor.
1046                 if (BuildConfig.FLAVOR.contentEquals("free")) {
1047                     // The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
1048                     AdHelper.pauseAd(findViewById(R.id.adview));
1049                 }
1050
1051                 // Remove the translucent overlays.
1052                 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
1053
1054                 // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
1055                 drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
1056
1057                 /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
1058                  * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
1059                  * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
1060                  */
1061                 rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
1062
1063                 // Set `rootCoordinatorLayout` to fill the entire screen.
1064                 rootCoordinatorLayout.setFitsSystemWindows(false);
1065
1066                 // Disable the sliding drawers.
1067                 drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
1068
1069                 // Add `view` to `fullScreenVideoFrameLayout` and display it on the screen.
1070                 fullScreenVideoFrameLayout.addView(view);
1071                 fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
1072             }
1073
1074             // Exit full screen video.
1075             @Override
1076             public void onHideCustomView() {
1077                 // Unset the full screen video flag.
1078                 displayingFullScreenVideo = false;
1079
1080                 // Hide `fullScreenVideoFrameLayout`.
1081                 fullScreenVideoFrameLayout.removeAllViews();
1082                 fullScreenVideoFrameLayout.setVisibility(View.GONE);
1083
1084                 // Enable the sliding drawers.
1085                 drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
1086
1087                 // Apply the appropriate full screen mode the `SYSTEM_UI` flags.
1088                 if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
1089                     if (hideSystemBarsOnFullscreen) {  // Hide everything.
1090                         // Remove the translucent navigation setting if it is currently flagged.
1091                         getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
1092
1093                         // Remove the translucent status bar overlay.
1094                         getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
1095
1096                         // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
1097                         drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
1098
1099                         /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
1100                          * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
1101                          * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
1102                          */
1103                         rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
1104                     } else {  // Hide everything except the status and navigation bars.
1105                         // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
1106                         rootCoordinatorLayout.setSystemUiVisibility(0);
1107
1108                         // Add the translucent status flag if it is unset.
1109                         getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
1110
1111                         if (translucentNavigationBarOnFullscreen) {
1112                             // Set the navigation bar to be translucent.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
1113                             getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
1114                         } else {
1115                             // Set the navigation bar to be black.
1116                             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
1117                         }
1118                     }
1119                 } else {  // Switch to normal viewing mode.
1120                     // Show the `appBar` if `findOnPageLinearLayout` is not visible.
1121                     if (findOnPageLinearLayout.getVisibility() == View.GONE) {
1122                         appBar.show();
1123                     }
1124
1125                     // Show the `BannerAd` in the free flavor.
1126                     if (BuildConfig.FLAVOR.contentEquals("free")) {
1127                         // Initialize the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
1128                         AdHelper.initializeAds(findViewById(R.id.adview), getApplicationContext(), getFragmentManager(), getString(R.string.google_app_id), getString(R.string.ad_unit_id));
1129                     }
1130
1131                     // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
1132                     rootCoordinatorLayout.setSystemUiVisibility(0);
1133
1134                     // Remove the translucent navigation bar flag if it is set.
1135                     getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
1136
1137                     // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
1138                     getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
1139
1140                     // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
1141                     rootCoordinatorLayout.setFitsSystemWindows(true);
1142                 }
1143
1144                 // Show the ad if this is the free flavor.
1145                 if (BuildConfig.FLAVOR.contentEquals("free")) {
1146                     // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
1147                     AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
1148                 }
1149             }
1150
1151             // Upload files.
1152             @Override
1153             public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
1154                 // Show the file chooser if the device is running API >= 21.
1155                 if (Build.VERSION.SDK_INT >= 21) {
1156                     // Store the file path callback.
1157                     fileChooserCallback = filePathCallback;
1158
1159                     // Create an intent to open a chooser based ont the file chooser parameters.
1160                     Intent fileChooserIntent = fileChooserParams.createIntent();
1161
1162                     // Open the file chooser.  Currently only one `startActivityForResult` exists in this activity, so the request code, used to differentiate them, is simply `0`.
1163                     startActivityForResult(fileChooserIntent, 0);
1164                 }
1165                 return true;
1166             }
1167         });
1168
1169         // Register `mainWebView` for a context menu.  This is used to see link targets and download images.
1170         registerForContextMenu(mainWebView);
1171
1172         // Allow the downloading of files.
1173         mainWebView.setDownloadListener((String url, String userAgent, String contentDisposition, String mimetype, long contentLength) -> {
1174             // Check if the download should be processed by an external app.
1175             if (downloadWithExternalApp) {  // Download with an external app.
1176                 openUrlWithExternalApp(url);
1177             } else {  // Download with Android's download manager.
1178                 // Check to see if the WRITE_EXTERNAL_STORAGE permission has already been granted.
1179                 if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission has not been granted.
1180                     // The WRITE_EXTERNAL_STORAGE permission needs to be requested.
1181
1182                     // Store the variables for future use by `onRequestPermissionsResult()`.
1183                     downloadUrl = url;
1184                     downloadContentDisposition = contentDisposition;
1185                     downloadContentLength = contentLength;
1186
1187                     // Show a dialog if the user has previously denied the permission.
1188                     if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
1189                         // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_FILE.
1190                         DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_FILE);
1191
1192                         // Show the download location permission alert dialog.  The permission will be requested when the the dialog is closed.
1193                         downloadLocationPermissionDialogFragment.show(getFragmentManager(), getString(R.string.download_location));
1194                     } else {  // Show the permission request directly.
1195                         // Request the permission.  The download dialog will be launched by `onRequestPermissionResult()`.
1196                         ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
1197                     }
1198                 } else {  // The storage permission has already been granted.
1199                     // Get a handle for the download file alert dialog.
1200                     AppCompatDialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(url, contentDisposition, contentLength);
1201
1202                     // Show the download file alert dialog.
1203                     downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
1204                 }
1205             }
1206         });
1207
1208         // Allow pinch to zoom.
1209         mainWebView.getSettings().setBuiltInZoomControls(true);
1210
1211         // Hide zoom controls.
1212         mainWebView.getSettings().setDisplayZoomControls(false);
1213
1214         // Set `mainWebView` to use a wide viewport.  Otherwise, some web pages will be scrunched and some content will render outside the screen.
1215         mainWebView.getSettings().setUseWideViewPort(true);
1216
1217         // Set `mainWebView` to load in overview mode (zoomed out to the maximum width).
1218         mainWebView.getSettings().setLoadWithOverviewMode(true);
1219
1220         // Explicitly disable geolocation.
1221         mainWebView.getSettings().setGeolocationEnabled(false);
1222
1223         // Initialize cookieManager.
1224         cookieManager = CookieManager.getInstance();
1225
1226         // Replace the header that `WebView` creates for `X-Requested-With` with a null value.  The default value is the application ID (com.stoutner.privacybrowser.standard).
1227         customHeaders.put("X-Requested-With", "");
1228
1229         // Initialize the default preference values the first time the program is run.  `false` keeps this command from resetting any current preferences back to default.
1230         PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
1231
1232         // Get a handle for the `Runtime`.
1233         privacyBrowserRuntime = Runtime.getRuntime();
1234
1235         // Store the application's private data directory.
1236         privateDataDirectoryString = getApplicationInfo().dataDir;
1237         // `dataDir` will vary, but will be something like `/data/user/0/com.stoutner.privacybrowser.standard`, which links to `/data/data/com.stoutner.privacybrowser.standard`.
1238
1239         // Initialize `inFullScreenBrowsingMode`, which is always false at this point because Privacy Browser never starts in full screen browsing mode.
1240         inFullScreenBrowsingMode = false;
1241
1242         // Initialize the privacy settings variables.
1243         javaScriptEnabled = false;
1244         firstPartyCookiesEnabled = false;
1245         thirdPartyCookiesEnabled = false;
1246         domStorageEnabled = false;
1247         saveFormDataEnabled = false;  // Form data can be removed once the minimum API >= 26.
1248         nightMode = false;
1249
1250         // Store the default user agent.
1251         webViewDefaultUserAgent = mainWebView.getSettings().getUserAgentString();
1252
1253         // Initialize the WebView title.
1254         webViewTitle = getString(R.string.no_title);
1255
1256         // Initialize the favorite icon bitmap.  `ContextCompat` must be used until API >= 21.
1257         Drawable favoriteIconDrawable = ContextCompat.getDrawable(getApplicationContext(), R.drawable.world);
1258         BitmapDrawable favoriteIconBitmapDrawable = (BitmapDrawable) favoriteIconDrawable;
1259         assert favoriteIconBitmapDrawable != null;
1260         favoriteIconDefaultBitmap = favoriteIconBitmapDrawable.getBitmap();
1261
1262         // If the favorite icon is null, load the default.
1263         if (favoriteIconBitmap == null) {
1264             favoriteIconBitmap = favoriteIconDefaultBitmap;
1265         }
1266
1267         // Initialize the user agent array adapter and string array.
1268         userAgentNamesArray = ArrayAdapter.createFromResource(this, R.array.user_agent_names, R.layout.spinner_item);
1269         userAgentDataArray = resources.getStringArray(R.array.user_agent_data);
1270
1271         // Apply the app settings from the shared preferences.
1272         applyAppSettings();
1273
1274         // Instantiate the block list helper.
1275         BlockListHelper blockListHelper = new BlockListHelper();
1276
1277         // Initialize the list of resource requests.
1278         resourceRequests = new ArrayList<>();
1279
1280         // Parse the block lists.
1281         final ArrayList<List<String[]>> easyList = blockListHelper.parseBlockList(getAssets(), "blocklists/easylist.txt");
1282         final ArrayList<List<String[]>> easyPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/easyprivacy.txt");
1283         final ArrayList<List<String[]>> fanboysAnnoyanceList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-annoyance.txt");
1284         final ArrayList<List<String[]>> fanboysSocialList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-social.txt");
1285         final ArrayList<List<String[]>> ultraPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/ultraprivacy.txt");
1286
1287         // Store the list versions.
1288         easyListVersion = easyList.get(0).get(0)[0];
1289         easyPrivacyVersion = easyPrivacy.get(0).get(0)[0];
1290         fanboysAnnoyanceVersion = fanboysAnnoyanceList.get(0).get(0)[0];
1291         fanboysSocialVersion = fanboysSocialList.get(0).get(0)[0];
1292         ultraPrivacyVersion = ultraPrivacy.get(0).get(0)[0];
1293
1294         // Get a handle for the activity.  This is used to update the requests counter while the navigation menu is open.
1295         Activity activity = this;
1296
1297         mainWebView.setWebViewClient(new WebViewClient() {
1298             // `shouldOverrideUrlLoading` makes this `WebView` the default handler for URLs inside the app, so that links are not kicked out to other apps.
1299             // The deprecated `shouldOverrideUrlLoading` must be used until API >= 24.
1300             @SuppressWarnings("deprecation")
1301             @Override
1302             public boolean shouldOverrideUrlLoading(WebView view, String url) {
1303                 if (url.startsWith("http")) {  // Load the URL in Privacy Browser.
1304                     // Reset the formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
1305                     formattedUrlString = "";
1306
1307                     // Apply the domain settings for the new URL.  `applyDomainSettings` doesn't do anything if the domain has not changed.
1308                     boolean userAgentChanged = applyDomainSettings(url, true, false);
1309
1310                     // Check if the user agent has changed.
1311                     if (userAgentChanged) {
1312                         // Manually load the URL.  The changing of the user agent will cause WebView to reload the previous URL.
1313                         mainWebView.loadUrl(url, customHeaders);
1314
1315                         // Returning true indicates that Privacy Browser is manually handling the loading of the URL.
1316                         return true;
1317                     } else {
1318                         // Returning false causes the current WebView to handle the URL and prevents it from adding redirects to the history list.
1319                         return false;
1320                     }
1321                 } else if (url.startsWith("mailto:")) {  // Load the email address in an external email program.
1322                     // Use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
1323                     Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
1324
1325                     // Parse the url and set it as the data for the intent.
1326                     emailIntent.setData(Uri.parse(url));
1327
1328                     // Open the email program in a new task instead of as part of Privacy Browser.
1329                     emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1330
1331                     // Make it so.
1332                     startActivity(emailIntent);
1333
1334                     // Returning true indicates Privacy Browser is handling the URL by creating an intent.
1335                     return true;
1336                 } else if (url.startsWith("tel:")) {  // Load the phone number in the dialer.
1337                     // Open the dialer and load the phone number, but wait for the user to place the call.
1338                     Intent dialIntent = new Intent(Intent.ACTION_DIAL);
1339
1340                     // Add the phone number to the intent.
1341                     dialIntent.setData(Uri.parse(url));
1342
1343                     // Open the dialer in a new task instead of as part of Privacy Browser.
1344                     dialIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1345
1346                     // Make it so.
1347                     startActivity(dialIntent);
1348
1349                     // Returning true indicates Privacy Browser is handling the URL by creating an intent.
1350                     return true;
1351                 } else {  // Load a system chooser to select an app that can handle the URL.
1352                     // Open an app that can handle the URL.
1353                     Intent genericIntent = new Intent(Intent.ACTION_VIEW);
1354
1355                     // Add the URL to the intent.
1356                     genericIntent.setData(Uri.parse(url));
1357
1358                     // List all apps that can handle the URL instead of just opening the first one.
1359                     genericIntent.addCategory(Intent.CATEGORY_BROWSABLE);
1360
1361                     // Open the app in a new task instead of as part of Privacy Browser.
1362                     genericIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1363
1364                     // Start the app or display a snackbar if no app is available to handle the URL.
1365                     try {
1366                         startActivity(genericIntent);
1367                     } catch (ActivityNotFoundException exception) {
1368                         Snackbar.make(mainWebView, getString(R.string.unrecognized_url) + "  " + url, Snackbar.LENGTH_SHORT).show();
1369                     }
1370
1371                     // Returning true indicates Privacy Browser is handling the URL by creating an intent.
1372                     return true;
1373                 }
1374             }
1375
1376             // Check requests against the block lists.  The deprecated `shouldInterceptRequest()` must be used until minimum API >= 21.
1377             @SuppressWarnings("deprecation")
1378             @Override
1379             public WebResourceResponse shouldInterceptRequest(WebView view, String url){
1380                 // Create an empty web resource response to be used if the resource request is blocked.
1381                 WebResourceResponse emptyWebResourceResponse = new WebResourceResponse("text/plain", "utf8", new ByteArrayInputStream("".getBytes()));
1382
1383                 // Reset the whitelist results tracker.
1384                 whiteListResultStringArray = null;
1385
1386                 // Initialize the third party request tracker.
1387                 boolean isThirdPartyRequest = false;
1388
1389                 // Initialize the current domain string.
1390                 String currentDomain = "";
1391
1392                 // Nobody is happy when comparing null strings.
1393                 if (!(formattedUrlString == null) && !(url == null)) {
1394                     // Get the domain strings to URIs.
1395                     Uri currentDomainUri = Uri.parse(formattedUrlString);
1396                     Uri requestDomainUri = Uri.parse(url);
1397
1398                     // Get the domain host names.
1399                     String currentBaseDomain = currentDomainUri.getHost();
1400                     String requestBaseDomain = requestDomainUri.getHost();
1401
1402                     // Update the current domain variable.
1403                     currentDomain = currentBaseDomain;
1404
1405                     // Only compare the current base domain and the request base domain if neither is null.
1406                     if (!(currentBaseDomain == null) && !(requestBaseDomain == null)) {
1407                         // Determine the current base domain.
1408                         while (currentBaseDomain.indexOf(".", currentBaseDomain.indexOf(".") + 1) > 0) {  // There is at least one subdomain.
1409                             // Remove the first subdomain.
1410                             currentBaseDomain = currentBaseDomain.substring(currentBaseDomain.indexOf(".") + 1);
1411                         }
1412
1413                         // Determine the request base domain.
1414                         while (requestBaseDomain.indexOf(".", requestBaseDomain.indexOf(".") + 1) > 0) {  // There is at least one subdomain.
1415                             // Remove the first subdomain.
1416                             requestBaseDomain = requestBaseDomain.substring(requestBaseDomain.indexOf(".") + 1);
1417                         }
1418
1419                         // Update the third party request tracker.
1420                         isThirdPartyRequest = !currentBaseDomain.equals(requestBaseDomain);
1421                     }
1422                 }
1423
1424                 // Block third-party requests if enabled.
1425                 if (isThirdPartyRequest && blockAllThirdPartyRequests) {
1426                     // Increment the blocked requests counters.
1427                     blockedRequests++;
1428                     thirdPartyBlockedRequests++;
1429
1430                     // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1431                     activity.runOnUiThread(() -> {
1432                         navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1433                         blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1434                         blockAllThirdPartyRequestsMenuItem.setTitle(thirdPartyBlockedRequests + " - " + getString(R.string.block_all_third_party_requests));
1435                     });
1436
1437                     // Add the request to the log.
1438                     resourceRequests.add(new String[]{String.valueOf(REQUEST_THIRD_PARTY), url});
1439
1440                     // Return an empty web resource response.
1441                     return emptyWebResourceResponse;
1442                 }
1443
1444                 // Check UltraPrivacy if it is enabled.
1445                 if (ultraPrivacyEnabled) {
1446                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, ultraPrivacy)) {
1447                         // Increment the blocked requests counters.
1448                         blockedRequests++;
1449                         ultraPrivacyBlockedRequests++;
1450
1451                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1452                         activity.runOnUiThread(() -> {
1453                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1454                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1455                             ultraPrivacyMenuItem.setTitle(ultraPrivacyBlockedRequests + " - " + getString(R.string.ultraprivacy));
1456                         });
1457
1458                         // The resource request was blocked.  Return an empty web resource response.
1459                         return emptyWebResourceResponse;
1460                     }
1461
1462                     // If the whitelist result is not null, the request has been allowed by UltraPrivacy.
1463                     if (whiteListResultStringArray != null) {
1464                         // Add a whitelist entry to the resource requests array.
1465                         resourceRequests.add(whiteListResultStringArray);
1466
1467                         // The resource request has been allowed by UltraPrivacy.  `return null` loads the requested resource.
1468                         return null;
1469                     }
1470                 }
1471
1472                 // Check EasyList if it is enabled.
1473                 if (easyListEnabled) {
1474                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, easyList)) {
1475                         // Increment the blocked requests counters.
1476                         blockedRequests++;
1477                         easyListBlockedRequests++;
1478
1479                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1480                         activity.runOnUiThread(() -> {
1481                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1482                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1483                             easyListMenuItem.setTitle(easyListBlockedRequests + " - " + getString(R.string.easylist));
1484                         });
1485
1486                         // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
1487                         whiteListResultStringArray = null;
1488
1489                         // The resource request was blocked.  Return an empty web resource response.
1490                         return emptyWebResourceResponse;
1491                     }
1492                 }
1493
1494                 // Check EasyPrivacy if it is enabled.
1495                 if (easyPrivacyEnabled) {
1496                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, easyPrivacy)) {
1497                         // Increment the blocked requests counters.
1498                         blockedRequests++;
1499                         easyPrivacyBlockedRequests++;
1500
1501                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1502                         activity.runOnUiThread(() -> {
1503                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1504                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1505                             easyPrivacyMenuItem.setTitle(easyPrivacyBlockedRequests + " - " + getString(R.string.easyprivacy));
1506                         });
1507
1508                         // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
1509                         whiteListResultStringArray = null;
1510
1511                         // The resource request was blocked.  Return an empty web resource response.
1512                         return emptyWebResourceResponse;
1513                     }
1514                 }
1515
1516                 // Check Fanboy’s Annoyance List if it is enabled.
1517                 if (fanboysAnnoyanceListEnabled) {
1518                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, fanboysAnnoyanceList)) {
1519                         // Increment the blocked requests counters.
1520                         blockedRequests++;
1521                         fanboysAnnoyanceListBlockedRequests++;
1522
1523                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1524                         activity.runOnUiThread(() -> {
1525                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1526                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1527                             fanboysAnnoyanceListMenuItem.setTitle(fanboysAnnoyanceListBlockedRequests + " - " + getString(R.string.fanboys_annoyance_list));
1528                         });
1529
1530                         // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
1531                         whiteListResultStringArray = null;
1532
1533                         // The resource request was blocked.  Return an empty web resource response.
1534                         return emptyWebResourceResponse;
1535                     }
1536                 } else if (fanboysSocialBlockingListEnabled){  // Only check Fanboy’s Social Blocking List if Fanboy’s Annoyance List is disabled.
1537                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, fanboysSocialList)) {
1538                         // Increment the blocked requests counters.
1539                         blockedRequests++;
1540                         fanboysSocialBlockingListBlockedRequests++;
1541
1542                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1543                         activity.runOnUiThread(() -> {
1544                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1545                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1546                             fanboysSocialBlockingListMenuItem.setTitle(fanboysSocialBlockingListBlockedRequests + " - " + getString(R.string.fanboys_social_blocking_list));
1547                         });
1548
1549                         // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
1550                         whiteListResultStringArray = null;
1551
1552                         // The resource request was blocked.  Return an empty web resource response.
1553                         return emptyWebResourceResponse;
1554                     }
1555                 }
1556
1557                 // Add the request to the log because it hasn't been processed by any of the previous checks.
1558                 if (whiteListResultStringArray != null ) {  // The request was processed by a whitelist.
1559                     resourceRequests.add(whiteListResultStringArray);
1560                 } else {  // The request didn't match any blocklist entry.  Log it as a default request.
1561                     resourceRequests.add(new String[]{String.valueOf(REQUEST_DEFAULT), url});
1562                 }
1563
1564                 // The resource request has not been blocked.  `return null` loads the requested resource.
1565                 return null;
1566             }
1567
1568             // Handle HTTP authentication requests.
1569             @Override
1570             public void onReceivedHttpAuthRequest(WebView view, HttpAuthHandler handler, String host, String realm) {
1571                 // Store `handler` so it can be accessed from `onHttpAuthenticationCancel()` and `onHttpAuthenticationProceed()`.
1572                 httpAuthHandler = handler;
1573
1574                 // Display the HTTP authentication dialog.
1575                 AppCompatDialogFragment httpAuthenticationDialogFragment = HttpAuthenticationDialog.displayDialog(host, realm);
1576                 httpAuthenticationDialogFragment.show(getSupportFragmentManager(), getString(R.string.http_authentication));
1577             }
1578
1579             // Update the URL in urlTextBox when the page starts to load.
1580             @Override
1581             public void onPageStarted(WebView view, String url, Bitmap favicon) {
1582                 // Reset the list of resource requests.
1583                 resourceRequests.clear();
1584
1585                 // Initialize the counters for requests blocked by each blocklist.
1586                 blockedRequests = 0;
1587                 easyListBlockedRequests = 0;
1588                 easyPrivacyBlockedRequests = 0;
1589                 fanboysAnnoyanceListBlockedRequests = 0;
1590                 fanboysSocialBlockingListBlockedRequests = 0;
1591                 ultraPrivacyBlockedRequests = 0;
1592                 thirdPartyBlockedRequests = 0;
1593
1594                 // If night mode is enabled, hide `mainWebView` until after the night mode CSS is applied.
1595                 if (nightMode) {
1596                     mainWebView.setVisibility(View.INVISIBLE);
1597                 }
1598
1599                 // Hide the keyboard.  `0` indicates no additional flags.
1600                 inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
1601
1602                 // Check to see if Privacy Browser is waiting on Orbot.
1603                 if (!waitingForOrbot) {  // We are not waiting on Orbot, so we need to process the URL.
1604                     // We need to update `formattedUrlString` at the beginning of the load, so that if the user toggles JavaScript during the load the new website is reloaded.
1605                     formattedUrlString = url;
1606
1607                     // Display the formatted URL text.
1608                     urlTextBox.setText(formattedUrlString);
1609
1610                     // Apply text highlighting to `urlTextBox`.
1611                     highlightUrlText();
1612
1613                     // Apply any custom domain settings if the URL was loaded by navigating history.
1614                     if (navigatingHistory) {
1615                         // Apply the domain settings.
1616                         boolean userAgentChanged = applyDomainSettings(url, true, false);
1617
1618                         // Reset `navigatingHistory`.
1619                         navigatingHistory = false;
1620
1621                         // Manually load the URL if the user agent has changed, which will have caused the previous URL to be reloaded.
1622                         if (userAgentChanged) {
1623                             loadUrl(formattedUrlString);
1624                         }
1625                     }
1626
1627                     // Set `urlIsLoading` to `true`, so that redirects while loading do not trigger changes in the user agent, which forces another reload of the existing page.
1628                     urlIsLoading = true;
1629
1630                     // Replace Refresh with Stop if the menu item has been created.  (The WebView typically begins loading before the menu items are instantiated.)
1631                     if (refreshMenuItem != null) {
1632                         // Set the title.
1633                         refreshMenuItem.setTitle(R.string.stop);
1634
1635                         // If the icon is displayed in the AppBar, set it according to the theme.
1636                         if (displayAdditionalAppBarIcons) {
1637                             if (darkTheme) {
1638                                 refreshMenuItem.setIcon(R.drawable.close_dark);
1639                             } else {
1640                                 refreshMenuItem.setIcon(R.drawable.close_light);
1641                             }
1642                         }
1643                     }
1644                 }
1645             }
1646
1647             // It is necessary to update `formattedUrlString` and `urlTextBox` after the page finishes loading because the final URL can change during load.
1648             @Override
1649             public void onPageFinished(WebView view, String url) {
1650                 // Reset the wide view port if it has been turned off by the waiting for Orbot message.
1651                 if (!waitingForOrbot) {
1652                     // Only use a wide view port if the URL starts with `http`, not for `file://` and `content://`.
1653                     mainWebView.getSettings().setUseWideViewPort(url.startsWith("http"));
1654                 }
1655
1656                 // Flush any cookies to persistent storage.  `CookieManager` has become very lazy about flushing cookies in recent versions.
1657                 if (firstPartyCookiesEnabled && Build.VERSION.SDK_INT >= 21) {
1658                     cookieManager.flush();
1659                 }
1660
1661                 // Update the Refresh menu item if it has been created.
1662                 if (refreshMenuItem != null) {
1663                     // Reset the Refresh title.
1664                     refreshMenuItem.setTitle(R.string.refresh);
1665
1666                     // If the icon is displayed in the AppBar, reset it according to the theme.
1667                     if (displayAdditionalAppBarIcons) {
1668                         if (darkTheme) {
1669                             refreshMenuItem.setIcon(R.drawable.refresh_enabled_dark);
1670                         } else {
1671                             refreshMenuItem.setIcon(R.drawable.refresh_enabled_light);
1672                         }
1673                     }
1674                 }
1675
1676                 // Reset `urlIsLoading`, which is used to prevent reloads on redirect if the user agent changes.
1677                 urlIsLoading = false;
1678
1679                 // Clear the cache and history if Incognito Mode is enabled.
1680                 if (incognitoModeEnabled) {
1681                     // Clear the cache.  `true` includes disk files.
1682                     mainWebView.clearCache(true);
1683
1684                     // Clear the back/forward history.
1685                     mainWebView.clearHistory();
1686
1687                     // Manually delete cache folders.
1688                     try {
1689                         // Delete the main cache directory.
1690                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
1691
1692                         // Delete the secondary `Service Worker` cache directory.
1693                         // A `String[]` must be used because the directory contains a space and `Runtime.exec` will not escape the string correctly otherwise.
1694                         privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
1695                     } catch (IOException e) {
1696                         // Do nothing if an error is thrown.
1697                     }
1698                 }
1699
1700                 // Update `urlTextBox` and apply domain settings if not waiting on Orbot.
1701                 if (!waitingForOrbot) {
1702                     // Check to see if `WebView` has set `url` to be `about:blank`.
1703                     if (url.equals("about:blank")) {  // `WebView` is blank, so `formattedUrlString` should be `""` and `urlTextBox` should display a hint.
1704                         // Set `formattedUrlString` to `""`.
1705                         formattedUrlString = "";
1706
1707                         urlTextBox.setText(formattedUrlString);
1708
1709                         // Request focus for `urlTextBox`.
1710                         urlTextBox.requestFocus();
1711
1712                         // Display the keyboard.
1713                         inputMethodManager.showSoftInput(urlTextBox, 0);
1714
1715                         // Apply the domain settings.  This clears any settings from the previous domain.
1716                         applyDomainSettings(formattedUrlString, true, false);
1717                     } else {  // `WebView` has loaded a webpage.
1718                         // Set `formattedUrlString`.
1719                         formattedUrlString = url;
1720
1721                         // Only update `urlTextBox` if the user is not typing in it.
1722                         if (!urlTextBox.hasFocus()) {
1723                             // Display the formatted URL text.
1724                             urlTextBox.setText(formattedUrlString);
1725
1726                             // Apply text highlighting to `urlTextBox`.
1727                             highlightUrlText();
1728                         }
1729                     }
1730
1731                     // Store the SSL certificate so it can be accessed from `ViewSslCertificateDialog` and `PinnedSslCertificateMismatchDialog`.
1732                     sslCertificate = mainWebView.getCertificate();
1733
1734                     // Check the current website SSL certificate against the pinned SSL certificate if there is a pinned SSL certificate the user has not chosen to ignore it for this session.
1735                     // Also ignore if changes in the user agent causes an error while navigating history.
1736                     if (pinnedDomainSslCertificate && !ignorePinnedSslCertificate && navigatingHistory) {
1737                         // Initialize the current SSL certificate variables.
1738                         String currentWebsiteIssuedToCName = "";
1739                         String currentWebsiteIssuedToOName = "";
1740                         String currentWebsiteIssuedToUName = "";
1741                         String currentWebsiteIssuedByCName = "";
1742                         String currentWebsiteIssuedByOName = "";
1743                         String currentWebsiteIssuedByUName = "";
1744                         Date currentWebsiteSslStartDate = null;
1745                         Date currentWebsiteSslEndDate = null;
1746
1747
1748                         // Extract the individual pieces of information from the current website SSL certificate if it is not null.
1749                         if (sslCertificate != null) {
1750                             currentWebsiteIssuedToCName = sslCertificate.getIssuedTo().getCName();
1751                             currentWebsiteIssuedToOName = sslCertificate.getIssuedTo().getOName();
1752                             currentWebsiteIssuedToUName = sslCertificate.getIssuedTo().getUName();
1753                             currentWebsiteIssuedByCName = sslCertificate.getIssuedBy().getCName();
1754                             currentWebsiteIssuedByOName = sslCertificate.getIssuedBy().getOName();
1755                             currentWebsiteIssuedByUName = sslCertificate.getIssuedBy().getUName();
1756                             currentWebsiteSslStartDate = sslCertificate.getValidNotBeforeDate();
1757                             currentWebsiteSslEndDate = sslCertificate.getValidNotAfterDate();
1758                         }
1759
1760                         // Initialize `String` variables to store the SSL certificate dates.  `Strings` are needed to compare the values below, which doesn't work with `Dates` if they are `null`.
1761                         String currentWebsiteSslStartDateString = "";
1762                         String currentWebsiteSslEndDateString = "";
1763                         String pinnedDomainSslStartDateString = "";
1764                         String pinnedDomainSslEndDateString = "";
1765
1766                         // Convert the `Dates` to `Strings` if they are not `null`.
1767                         if (currentWebsiteSslStartDate != null) {
1768                             currentWebsiteSslStartDateString = currentWebsiteSslStartDate.toString();
1769                         }
1770
1771                         if (currentWebsiteSslEndDate != null) {
1772                             currentWebsiteSslEndDateString = currentWebsiteSslEndDate.toString();
1773                         }
1774
1775                         if (pinnedDomainSslStartDate != null) {
1776                             pinnedDomainSslStartDateString = pinnedDomainSslStartDate.toString();
1777                         }
1778
1779                         if (pinnedDomainSslEndDate != null) {
1780                             pinnedDomainSslEndDateString = pinnedDomainSslEndDate.toString();
1781                         }
1782
1783                         // Check to see if the pinned SSL certificate matches the current website certificate.
1784                         if (!currentWebsiteIssuedToCName.equals(pinnedDomainSslIssuedToCNameString) || !currentWebsiteIssuedToOName.equals(pinnedDomainSslIssuedToONameString) ||
1785                                 !currentWebsiteIssuedToUName.equals(pinnedDomainSslIssuedToUNameString) || !currentWebsiteIssuedByCName.equals(pinnedDomainSslIssuedByCNameString) ||
1786                                 !currentWebsiteIssuedByOName.equals(pinnedDomainSslIssuedByONameString) || !currentWebsiteIssuedByUName.equals(pinnedDomainSslIssuedByUNameString) ||
1787                                 !currentWebsiteSslStartDateString.equals(pinnedDomainSslStartDateString) || !currentWebsiteSslEndDateString.equals(pinnedDomainSslEndDateString)) {
1788                             // The pinned SSL certificate doesn't match the current domain certificate.
1789                             //Display the pinned SSL certificate mismatch `AlertDialog`.
1790                             AppCompatDialogFragment pinnedSslCertificateMismatchDialogFragment = new PinnedSslCertificateMismatchDialog();
1791                             pinnedSslCertificateMismatchDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_mismatch));
1792                         }
1793                     }
1794                 }
1795             }
1796
1797             // Handle SSL Certificate errors.
1798             @Override
1799             public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
1800                 // Get the current website SSL certificate.
1801                 SslCertificate currentWebsiteSslCertificate = error.getCertificate();
1802
1803                 // Extract the individual pieces of information from the current website SSL certificate.
1804                 String currentWebsiteIssuedToCName = currentWebsiteSslCertificate.getIssuedTo().getCName();
1805                 String currentWebsiteIssuedToOName = currentWebsiteSslCertificate.getIssuedTo().getOName();
1806                 String currentWebsiteIssuedToUName = currentWebsiteSslCertificate.getIssuedTo().getUName();
1807                 String currentWebsiteIssuedByCName = currentWebsiteSslCertificate.getIssuedBy().getCName();
1808                 String currentWebsiteIssuedByOName = currentWebsiteSslCertificate.getIssuedBy().getOName();
1809                 String currentWebsiteIssuedByUName = currentWebsiteSslCertificate.getIssuedBy().getUName();
1810                 Date currentWebsiteSslStartDate = currentWebsiteSslCertificate.getValidNotBeforeDate();
1811                 Date currentWebsiteSslEndDate = currentWebsiteSslCertificate.getValidNotAfterDate();
1812
1813                 // Proceed to the website if the current SSL website certificate matches the pinned domain certificate.
1814                 if (pinnedDomainSslCertificate &&
1815                         currentWebsiteIssuedToCName.equals(pinnedDomainSslIssuedToCNameString) && currentWebsiteIssuedToOName.equals(pinnedDomainSslIssuedToONameString) &&
1816                         currentWebsiteIssuedToUName.equals(pinnedDomainSslIssuedToUNameString) && currentWebsiteIssuedByCName.equals(pinnedDomainSslIssuedByCNameString) &&
1817                         currentWebsiteIssuedByOName.equals(pinnedDomainSslIssuedByONameString) && currentWebsiteIssuedByUName.equals(pinnedDomainSslIssuedByUNameString) &&
1818                         currentWebsiteSslStartDate.equals(pinnedDomainSslStartDate) && currentWebsiteSslEndDate.equals(pinnedDomainSslEndDate)) {
1819                     // An SSL certificate is pinned and matches the current domain certificate.
1820                     // Proceed to the website without displaying an error.
1821                     handler.proceed();
1822                 } else {  // Either there isn't a pinned SSL certificate or it doesn't match the current website certificate.
1823                     // Store `handler` so it can be accesses from `onSslErrorCancel()` and `onSslErrorProceed()`.
1824                     sslErrorHandler = handler;
1825
1826                     // Display the SSL error `AlertDialog`.
1827                     AppCompatDialogFragment sslCertificateErrorDialogFragment = SslCertificateErrorDialog.displayDialog(error);
1828                     sslCertificateErrorDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_error));
1829                 }
1830             }
1831         });
1832
1833         // Get the intent that started the app.
1834         Intent launchingIntent = getIntent();
1835
1836         // Get the information from the intent.
1837         String launchingIntentAction = launchingIntent.getAction();
1838         Uri launchingIntentUriData = launchingIntent.getData();
1839
1840         // If the intent action is a web search, perform the search.
1841         if ((launchingIntentAction != null) && launchingIntentAction.equals(Intent.ACTION_WEB_SEARCH)) {
1842             // Create an encoded URL string.
1843             String encodedUrlString;
1844
1845             // Sanitize the search input and convert it to a search.
1846             try {
1847                 encodedUrlString = URLEncoder.encode(launchingIntent.getStringExtra(SearchManager.QUERY), "UTF-8");
1848             } catch (UnsupportedEncodingException exception) {
1849                 encodedUrlString = "";
1850             }
1851
1852             // Add the base search URL.
1853             formattedUrlString = searchURL + encodedUrlString;
1854         } else if (launchingIntentUriData != null){  // Check to see if the intent contains a new URL.
1855             // Set the formatted URL string.
1856             formattedUrlString = launchingIntentUriData.toString();
1857         }
1858
1859         // Load the website if not waiting for Orbot to connect.
1860         if (!waitingForOrbot) {
1861             loadUrl(formattedUrlString);
1862         }
1863     }
1864
1865     @Override
1866     protected void onNewIntent(Intent intent) {
1867         // Sets the new intent as the activity intent, so that any future `getIntent()`s pick up this one instead of creating a new activity.
1868         setIntent(intent);
1869
1870         // Get the information from the intent.
1871         String intentAction = intent.getAction();
1872         Uri intentUriData = intent.getData();
1873
1874         // If the intent action is a web search, perform the search.
1875         if ((intentAction != null) && intentAction.equals(Intent.ACTION_WEB_SEARCH)) {
1876             // Create an encoded URL string.
1877             String encodedUrlString;
1878
1879             // Sanitize the search input and convert it to a search.
1880             try {
1881                 encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
1882             } catch (UnsupportedEncodingException exception) {
1883                 encodedUrlString = "";
1884             }
1885
1886             // Add the base search URL.
1887             formattedUrlString = searchURL + encodedUrlString;
1888         } else if (intentUriData != null){  // Check to see if the intent contains a new URL.
1889             // Set the formatted URL string.
1890             formattedUrlString = intentUriData.toString();
1891         }
1892
1893         // Load the URL.
1894         loadUrl(formattedUrlString);
1895
1896         // Close the navigation drawer if it is open.
1897         if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
1898             drawerLayout.closeDrawer(GravityCompat.START);
1899         }
1900
1901         // Close the bookmarks drawer if it is open.
1902         if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
1903             drawerLayout.closeDrawer(GravityCompat.END);
1904         }
1905
1906         // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
1907         mainWebView.requestFocus();
1908     }
1909
1910     @Override
1911     public void onRestart() {
1912         // Run the default commands.
1913         super.onRestart();
1914
1915         // Make sure Orbot is running if Privacy Browser is proxying through Orbot.
1916         if (proxyThroughOrbot) {
1917             // Request Orbot to start.  If Orbot is already running no hard will be caused by this request.
1918             Intent orbotIntent = new Intent("org.torproject.android.intent.action.START");
1919
1920             // Send the intent to the Orbot package.
1921             orbotIntent.setPackage("org.torproject.android");
1922
1923             // Make it so.
1924             sendBroadcast(orbotIntent);
1925         }
1926
1927         // Apply the app settings if returning from the Settings activity..
1928         if (reapplyAppSettingsOnRestart) {
1929             // Apply the app settings.
1930             applyAppSettings();
1931
1932             // Reload the webpage if displaying of images has been disabled in the Settings activity.
1933             if (reloadOnRestart) {
1934                 // Reload `mainWebView`.
1935                 mainWebView.reload();
1936
1937                 // Reset `reloadOnRestartBoolean`.
1938                 reloadOnRestart = false;
1939             }
1940
1941             // Reset the return from settings flag.
1942             reapplyAppSettingsOnRestart = false;
1943         }
1944
1945         // Apply the domain settings if returning from the Domains activity.
1946         if (reapplyDomainSettingsOnRestart) {
1947             // Reapply the domain settings.
1948             applyDomainSettings(formattedUrlString, false, true);
1949
1950             // Reset `reapplyDomainSettingsOnRestart`.
1951             reapplyDomainSettingsOnRestart = false;
1952         }
1953
1954         // Load the URL on restart to apply changes to night mode.
1955         if (loadUrlOnRestart) {
1956             // Load the current `formattedUrlString`.
1957             loadUrl(formattedUrlString);
1958
1959             // Reset `loadUrlOnRestart.
1960             loadUrlOnRestart = false;
1961         }
1962
1963         // Update the bookmarks drawer if returning from the Bookmarks activity.
1964         if (restartFromBookmarksActivity) {
1965             // Close the bookmarks drawer.
1966             drawerLayout.closeDrawer(GravityCompat.END);
1967
1968             // Reload the bookmarks drawer.
1969             loadBookmarksFolder();
1970
1971             // Reset `restartFromBookmarksActivity`.
1972             restartFromBookmarksActivity = false;
1973         }
1974
1975         // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
1976         updatePrivacyIcons(true);
1977     }
1978
1979     // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
1980     @Override
1981     public void onResume() {
1982         // Run the default commands.
1983         super.onResume();
1984
1985         // Resume JavaScript (if enabled).
1986         mainWebView.resumeTimers();
1987
1988         // Resume `mainWebView`.
1989         mainWebView.onResume();
1990
1991         // Resume the adView for the free flavor.
1992         if (BuildConfig.FLAVOR.contentEquals("free")) {
1993             // Resume the ad.
1994             AdHelper.resumeAd(findViewById(R.id.adview));
1995         }
1996
1997         // Display a message to the user if waiting for Orbot.
1998         if (waitingForOrbot && !orbotStatus.equals("ON")) {
1999             // Disable the wide view port so that the waiting for Orbot text is displayed correctly.
2000             mainWebView.getSettings().setUseWideViewPort(false);
2001
2002             // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
2003             mainWebView.loadData(waitingForOrbotHtmlString, "text/html", null);
2004         }
2005
2006         if (displayingFullScreenVideo) {
2007             // Remove the translucent overlays.
2008             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
2009
2010             // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
2011             drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
2012
2013             /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
2014              * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
2015              * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
2016              */
2017             rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
2018         }
2019     }
2020
2021     @Override
2022     public void onPause() {
2023         // Run the default commands.
2024         super.onPause();
2025
2026         // Pause `mainWebView`.
2027         mainWebView.onPause();
2028
2029         // Stop all JavaScript.
2030         mainWebView.pauseTimers();
2031
2032         // Pause the ad or it will continue to consume resources in the background on the free flavor.
2033         if (BuildConfig.FLAVOR.contentEquals("free")) {
2034             // Pause the ad.
2035             AdHelper.pauseAd(findViewById(R.id.adview));
2036         }
2037     }
2038
2039     @Override
2040     public void onDestroy() {
2041         // Unregister the Orbot status broadcast receiver.
2042         this.unregisterReceiver(orbotStatusBroadcastReceiver);
2043
2044         // Close the bookmarks cursor and database.
2045         bookmarksCursor.close();
2046         bookmarksDatabaseHelper.close();
2047
2048         // Run the default commands.
2049         super.onDestroy();
2050     }
2051
2052     @Override
2053     public boolean onCreateOptionsMenu(Menu menu) {
2054         // Inflate the menu; this adds items to the action bar if it is present.
2055         getMenuInflater().inflate(R.menu.webview_options_menu, menu);
2056
2057         // Set mainMenu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons`.
2058         mainMenu = menu;
2059
2060         // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
2061         updatePrivacyIcons(false);
2062
2063         // Get handles for the menu items.
2064         MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
2065         MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
2066         MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
2067         MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
2068         MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
2069         refreshMenuItem = menu.findItem(R.id.refresh);
2070         blocklistsMenuItem = menu.findItem(R.id.blocklists);
2071         easyListMenuItem = menu.findItem(R.id.easylist);
2072         easyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
2073         fanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
2074         fanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
2075         ultraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
2076         blockAllThirdPartyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
2077         MenuItem adConsentMenuItem = menu.findItem(R.id.ad_consent);
2078
2079         // Only display third-party cookies if API >= 21
2080         toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
2081
2082         // Only display the form data menu items if the API < 26.
2083         toggleSaveFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
2084         clearFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
2085
2086         // Only show Ad Consent if this is the free flavor.
2087         adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
2088
2089         // Get the shared preference values.
2090         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
2091
2092         // Get the status of the additional AppBar icons.
2093         displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
2094
2095         // 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.
2096         if (displayAdditionalAppBarIcons) {
2097             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
2098             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
2099             refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
2100         } else { //Do not display the additional icons.
2101             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
2102             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
2103             refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
2104         }
2105
2106         // Replace Refresh with Stop if a URL is already loading.
2107         if (urlIsLoading) {
2108             // Set the title.
2109             refreshMenuItem.setTitle(R.string.stop);
2110
2111             // If the icon is displayed in the AppBar, set it according to the theme.
2112             if (displayAdditionalAppBarIcons) {
2113                 if (darkTheme) {
2114                     refreshMenuItem.setIcon(R.drawable.close_dark);
2115                 } else {
2116                     refreshMenuItem.setIcon(R.drawable.close_light);
2117                 }
2118             }
2119         }
2120
2121         return true;
2122     }
2123
2124     @Override
2125     public boolean onPrepareOptionsMenu(Menu menu) {
2126         // Get handles for the menu items.
2127         MenuItem addOrEditDomain = menu.findItem(R.id.add_or_edit_domain);
2128         MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
2129         MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
2130         MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
2131         MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
2132         MenuItem clearDataMenuItem = menu.findItem(R.id.clear_data);
2133         MenuItem clearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
2134         MenuItem clearDOMStorageMenuItem = menu.findItem(R.id.clear_dom_storage);
2135         MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
2136         MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
2137         MenuItem swipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
2138         MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
2139         MenuItem nightModeMenuItem = menu.findItem(R.id.night_mode);
2140         MenuItem proxyThroughOrbotMenuItem = menu.findItem(R.id.proxy_through_orbot);
2141
2142         // Set the text for the domain menu item.
2143         if (domainSettingsApplied) {
2144             addOrEditDomain.setTitle(R.string.edit_domain_settings);
2145         } else {
2146             addOrEditDomain.setTitle(R.string.add_domain_settings);
2147         }
2148
2149         // Set the status of the menu item checkboxes.
2150         toggleFirstPartyCookiesMenuItem.setChecked(firstPartyCookiesEnabled);
2151         toggleThirdPartyCookiesMenuItem.setChecked(thirdPartyCookiesEnabled);
2152         toggleDomStorageMenuItem.setChecked(domStorageEnabled);
2153         toggleSaveFormDataMenuItem.setChecked(saveFormDataEnabled);  // Form data can be removed once the minimum API >= 26.
2154         easyListMenuItem.setChecked(easyListEnabled);
2155         easyPrivacyMenuItem.setChecked(easyPrivacyEnabled);
2156         fanboysAnnoyanceListMenuItem.setChecked(fanboysAnnoyanceListEnabled);
2157         fanboysSocialBlockingListMenuItem.setChecked(fanboysSocialBlockingListEnabled);
2158         ultraPrivacyMenuItem.setChecked(ultraPrivacyEnabled);
2159         blockAllThirdPartyRequestsMenuItem.setChecked(blockAllThirdPartyRequests);
2160         swipeToRefreshMenuItem.setChecked(swipeRefreshLayout.isEnabled());
2161         displayImagesMenuItem.setChecked(mainWebView.getSettings().getLoadsImagesAutomatically());
2162         nightModeMenuItem.setChecked(nightMode);
2163         proxyThroughOrbotMenuItem.setChecked(proxyThroughOrbot);
2164
2165         // Enable third-party cookies if first-party cookies are enabled.
2166         toggleThirdPartyCookiesMenuItem.setEnabled(firstPartyCookiesEnabled);
2167
2168         // Enable DOM Storage if JavaScript is enabled.
2169         toggleDomStorageMenuItem.setEnabled(javaScriptEnabled);
2170
2171         // Enable Clear Cookies if there are any.
2172         clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
2173
2174         // Get a count of the number of files in the Local Storage directory.
2175         File localStorageDirectory = new File (privateDataDirectoryString + "/app_webview/Local Storage/");
2176         int localStorageDirectoryNumberOfFiles = 0;
2177         if (localStorageDirectory.exists()) {
2178             localStorageDirectoryNumberOfFiles = localStorageDirectory.list().length;
2179         }
2180
2181         // Get a count of the number of files in the IndexedDB directory.
2182         File indexedDBDirectory = new File (privateDataDirectoryString + "/app_webview/IndexedDB");
2183         int indexedDBDirectoryNumberOfFiles = 0;
2184         if (indexedDBDirectory.exists()) {
2185             indexedDBDirectoryNumberOfFiles = indexedDBDirectory.list().length;
2186         }
2187
2188         // Enable Clear DOM Storage if there is any.
2189         clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
2190
2191         // Enable Clear Form Data is there is any.  This can be removed once the minimum API >= 26.
2192         if (Build.VERSION.SDK_INT < 26) {
2193             WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(this);
2194             clearFormDataMenuItem.setEnabled(mainWebViewDatabase.hasFormData());
2195         } else {
2196             // Disable clear form data because it is not supported on current version of Android.
2197             clearFormDataMenuItem.setEnabled(false);
2198         }
2199
2200         // Enable Clear Data if any of the submenu items are enabled.
2201         clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
2202
2203         // Disable Fanboy's Social Blocking List if Fanboy's Annoyance List is checked.
2204         fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListEnabled);
2205
2206         // Initialize the display names for the blocklists with the number of blocked requests.
2207         blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + blockedRequests);
2208         easyListMenuItem.setTitle(easyListBlockedRequests + " - " + getString(R.string.easylist));
2209         easyPrivacyMenuItem.setTitle(easyPrivacyBlockedRequests + " - " + getString(R.string.easyprivacy));
2210         fanboysAnnoyanceListMenuItem.setTitle(fanboysAnnoyanceListBlockedRequests + " - " + getString(R.string.fanboys_annoyance_list));
2211         fanboysSocialBlockingListMenuItem.setTitle(fanboysSocialBlockingListBlockedRequests + " - " + getString(R.string.fanboys_social_blocking_list));
2212         ultraPrivacyMenuItem.setTitle(ultraPrivacyBlockedRequests + " - " + getString(R.string.ultraprivacy));
2213         blockAllThirdPartyRequestsMenuItem.setTitle(thirdPartyBlockedRequests + " - " + getString(R.string.block_all_third_party_requests));
2214
2215         // Get the current user agent.
2216         String currentUserAgent = mainWebView.getSettings().getUserAgentString();
2217
2218         // Select the current user agent menu item.  A switch statement cannot be used because the user agents are not compile time constants.
2219         if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[0])) {  // Privacy Browser.
2220             menu.findItem(R.id.user_agent_privacy_browser).setChecked(true);
2221         } else if (currentUserAgent.equals(webViewDefaultUserAgent)) {  // WebView Default.
2222             menu.findItem(R.id.user_agent_webview_default).setChecked(true);
2223         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[2])) {  // Firefox on Android.
2224             menu.findItem(R.id.user_agent_firefox_on_android).setChecked(true);
2225         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[3])) {  // Chrome on Android.
2226             menu.findItem(R.id.user_agent_chrome_on_android).setChecked(true);
2227         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[4])) {  // Safari on iOS.
2228             menu.findItem(R.id.user_agent_safari_on_ios).setChecked(true);
2229         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[5])) {  // Firefox on Linux.
2230             menu.findItem(R.id.user_agent_firefox_on_linux).setChecked(true);
2231         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[6])) {  // Chromium on Linux.
2232             menu.findItem(R.id.user_agent_chromium_on_linux).setChecked(true);
2233         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[7])) {  // Firefox on Windows.
2234             menu.findItem(R.id.user_agent_firefox_on_windows).setChecked(true);
2235         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[8])) {  // Chrome on Windows.
2236             menu.findItem(R.id.user_agent_chrome_on_windows).setChecked(true);
2237         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[9])) {  // Edge on Windows.
2238             menu.findItem(R.id.user_agent_edge_on_windows).setChecked(true);
2239         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[10])) {  // Internet Explorer on Windows.
2240             menu.findItem(R.id.user_agent_internet_explorer_on_windows).setChecked(true);
2241         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[11])) {  // Safari on macOS.
2242             menu.findItem(R.id.user_agent_safari_on_macos).setChecked(true);
2243         } else {  // Custom user agent.
2244             menu.findItem(R.id.user_agent_custom).setChecked(true);
2245         }
2246
2247         // Initialize font size variables.
2248         int fontSize = mainWebView.getSettings().getTextZoom();
2249         String fontSizeTitle;
2250         MenuItem selectedFontSizeMenuItem;
2251
2252         // Prepare the font size title and current size menu item.
2253         switch (fontSize) {
2254             case 25:
2255                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.twenty_five_percent);
2256                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_twenty_five_percent);
2257                 break;
2258
2259             case 50:
2260                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
2261                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
2262                 break;
2263
2264             case 75:
2265                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.seventy_five_percent);
2266                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_seventy_five_percent);
2267                 break;
2268
2269             case 100:
2270                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
2271                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
2272                 break;
2273
2274             case 125:
2275                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_twenty_five_percent);
2276                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_twenty_five_percent);
2277                 break;
2278
2279             case 150:
2280                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_fifty_percent);
2281                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_fifty_percent);
2282                 break;
2283
2284             case 175:
2285                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_seventy_five_percent);
2286                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_seventy_five_percent);
2287                 break;
2288
2289             case 200:
2290                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.two_hundred_percent);
2291                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_two_hundred_percent);
2292                 break;
2293
2294             default:
2295                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
2296                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
2297                 break;
2298         }
2299
2300         // Set the font size title and select the current size menu item.
2301         fontSizeMenuItem.setTitle(fontSizeTitle);
2302         selectedFontSizeMenuItem.setChecked(true);
2303
2304         // Run all the other default commands.
2305         super.onPrepareOptionsMenu(menu);
2306
2307         // Display the menu.
2308         return true;
2309     }
2310
2311     @Override
2312     // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
2313     @SuppressLint("SetJavaScriptEnabled")
2314     // removeAllCookies is deprecated, but it is required for API < 21.
2315     @SuppressWarnings("deprecation")
2316     public boolean onOptionsItemSelected(MenuItem menuItem) {
2317         // Get the selected menu item ID.
2318         int menuItemId = menuItem.getItemId();
2319
2320         // Set the commands that relate to the menu entries.
2321         switch (menuItemId) {
2322             case R.id.toggle_javascript:
2323                 // Switch the status of javaScriptEnabled.
2324                 javaScriptEnabled = !javaScriptEnabled;
2325
2326                 // Apply the new JavaScript status.
2327                 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
2328
2329                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2330                 updatePrivacyIcons(true);
2331
2332                 // Display a `Snackbar`.
2333                 if (javaScriptEnabled) {  // JavaScrip is enabled.
2334                     Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
2335                 } else if (firstPartyCookiesEnabled) {  // JavaScript is disabled, but first-party cookies are enabled.
2336                     Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
2337                 } else {  // Privacy mode.
2338                     Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
2339                 }
2340
2341                 // Reload the WebView.
2342                 mainWebView.reload();
2343                 return true;
2344
2345             case R.id.add_or_edit_domain:
2346                 if (domainSettingsApplied) {  // Edit the current domain settings.
2347                     // Reapply the domain settings on returning to `MainWebViewActivity`.
2348                     reapplyDomainSettingsOnRestart = true;
2349                     currentDomainName = "";
2350
2351                     // Create an intent to launch the domains activity.
2352                     Intent domainsIntent = new Intent(this, DomainsActivity.class);
2353
2354                     // Put extra information instructing the domains activity to directly load the current domain and close on back instead of returning to the domains list.
2355                     domainsIntent.putExtra("loadDomain", domainSettingsDatabaseId);
2356                     domainsIntent.putExtra("closeOnBack", true);
2357
2358                     // Make it so.
2359                     startActivity(domainsIntent);
2360                 } else {  // Add a new domain.
2361                     // Apply the new domain settings on returning to `MainWebViewActivity`.
2362                     reapplyDomainSettingsOnRestart = true;
2363                     currentDomainName = "";
2364
2365                     // Get the current domain
2366                     Uri currentUri = Uri.parse(formattedUrlString);
2367                     String currentDomain = currentUri.getHost();
2368
2369                     // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
2370                     DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
2371
2372                     // Create the domain and store the database ID.
2373                     int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
2374
2375                     // Create an intent to launch the domains activity.
2376                     Intent domainsIntent = new Intent(this, DomainsActivity.class);
2377
2378                     // Put extra information instructing the domains activity to directly load the new domain and close on back instead of returning to the domains list.
2379                     domainsIntent.putExtra("loadDomain", newDomainDatabaseId);
2380                     domainsIntent.putExtra("closeOnBack", true);
2381
2382                     // Make it so.
2383                     startActivity(domainsIntent);
2384                 }
2385                 return true;
2386
2387             case R.id.toggle_first_party_cookies:
2388                 // Switch the status of firstPartyCookiesEnabled.
2389                 firstPartyCookiesEnabled = !firstPartyCookiesEnabled;
2390
2391                 // Update the menu checkbox.
2392                 menuItem.setChecked(firstPartyCookiesEnabled);
2393
2394                 // Apply the new cookie status.
2395                 cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
2396
2397                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2398                 updatePrivacyIcons(true);
2399
2400                 // Display a `Snackbar`.
2401                 if (firstPartyCookiesEnabled) {  // First-party cookies are enabled.
2402                     Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
2403                 } else if (javaScriptEnabled) {  // JavaScript is still enabled.
2404                     Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
2405                 } else {  // Privacy mode.
2406                     Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
2407                 }
2408
2409                 // Reload the WebView.
2410                 mainWebView.reload();
2411                 return true;
2412
2413             case R.id.toggle_third_party_cookies:
2414                 if (Build.VERSION.SDK_INT >= 21) {
2415                     // Switch the status of thirdPartyCookiesEnabled.
2416                     thirdPartyCookiesEnabled = !thirdPartyCookiesEnabled;
2417
2418                     // Update the menu checkbox.
2419                     menuItem.setChecked(thirdPartyCookiesEnabled);
2420
2421                     // Apply the new cookie status.
2422                     cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
2423
2424                     // Display a `Snackbar`.
2425                     if (thirdPartyCookiesEnabled) {
2426                         Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
2427                     } else {
2428                         Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
2429                     }
2430
2431                     // Reload the WebView.
2432                     mainWebView.reload();
2433                 } // Else do nothing because SDK < 21.
2434                 return true;
2435
2436             case R.id.toggle_dom_storage:
2437                 // Switch the status of domStorageEnabled.
2438                 domStorageEnabled = !domStorageEnabled;
2439
2440                 // Update the menu checkbox.
2441                 menuItem.setChecked(domStorageEnabled);
2442
2443                 // Apply the new DOM Storage status.
2444                 mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
2445
2446                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2447                 updatePrivacyIcons(true);
2448
2449                 // Display a `Snackbar`.
2450                 if (domStorageEnabled) {
2451                     Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
2452                 } else {
2453                     Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
2454                 }
2455
2456                 // Reload the WebView.
2457                 mainWebView.reload();
2458                 return true;
2459
2460             // Form data can be removed once the minimum API >= 26.
2461             case R.id.toggle_save_form_data:
2462                 // Switch the status of saveFormDataEnabled.
2463                 saveFormDataEnabled = !saveFormDataEnabled;
2464
2465                 // Update the menu checkbox.
2466                 menuItem.setChecked(saveFormDataEnabled);
2467
2468                 // Apply the new form data status.
2469                 mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
2470
2471                 // Display a `Snackbar`.
2472                 if (saveFormDataEnabled) {
2473                     Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
2474                 } else {
2475                     Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
2476                 }
2477
2478                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2479                 updatePrivacyIcons(true);
2480
2481                 // Reload the WebView.
2482                 mainWebView.reload();
2483                 return true;
2484
2485             case R.id.clear_cookies:
2486                 Snackbar.make(findViewById(R.id.main_webview), R.string.cookies_deleted, Snackbar.LENGTH_LONG)
2487                         .setAction(R.string.undo, v -> {
2488                             // Do nothing because everything will be handled by `onDismissed()` below.
2489                         })
2490                         .addCallback(new Snackbar.Callback() {
2491                             @Override
2492                             public void onDismissed(Snackbar snackbar, int event) {
2493                                 switch (event) {
2494                                     // The user pushed the `Undo` button.
2495                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
2496                                         // Do nothing.
2497                                         break;
2498
2499                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
2500                                     default:
2501                                         // `cookieManager.removeAllCookie()` varies by SDK.
2502                                         if (Build.VERSION.SDK_INT < 21) {
2503                                             cookieManager.removeAllCookie();
2504                                         } else {
2505                                             // `null` indicates no callback.
2506                                             cookieManager.removeAllCookies(null);
2507                                         }
2508                                 }
2509                             }
2510                         })
2511                         .show();
2512                 return true;
2513
2514             case R.id.clear_dom_storage:
2515                 Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
2516                         .setAction(R.string.undo, v -> {
2517                             // Do nothing because everything will be handled by `onDismissed()` below.
2518                         })
2519                         .addCallback(new Snackbar.Callback() {
2520                             @Override
2521                             public void onDismissed(Snackbar snackbar, int event) {
2522                                 switch (event) {
2523                                     // The user pushed the `Undo` button.
2524                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
2525                                         // Do nothing.
2526                                         break;
2527
2528                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
2529                                     default:
2530                                         // Delete the DOM Storage.
2531                                         WebStorage webStorage = WebStorage.getInstance();
2532                                         webStorage.deleteAllData();
2533
2534                                         // Initialize a handler to manually delete the DOM storage files and directories.
2535                                         Handler deleteDomStorageHandler = new Handler();
2536
2537                                         // Setup a runnable to manually delete the DOM storage files and directories.
2538                                         Runnable deleteDomStorageRunnable = () -> {
2539                                             try {
2540                                                 // A `String[]` must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
2541                                                 privacyBrowserRuntime.exec(new String[]{"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
2542
2543                                                 // Multiple commands must be used because `Runtime.exec()` does not like `*`.
2544                                                 privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
2545                                                 privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
2546                                                 privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
2547                                                 privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
2548                                             } catch (IOException e) {
2549                                                 // Do nothing if an error is thrown.
2550                                             }
2551                                         };
2552
2553                                         // Manually delete the DOM storage files after 200 milliseconds.
2554                                         deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
2555                                 }
2556                             }
2557                         })
2558                         .show();
2559                 return true;
2560
2561             // Form data can be remove once the minimum API >= 26.
2562             case R.id.clear_form_data:
2563                 Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_deleted, Snackbar.LENGTH_LONG)
2564                         .setAction(R.string.undo, v -> {
2565                             // Do nothing because everything will be handled by `onDismissed()` below.
2566                         })
2567                         .addCallback(new Snackbar.Callback() {
2568                             @Override
2569                             public void onDismissed(Snackbar snackbar, int event) {
2570                                 switch (event) {
2571                                     // The user pushed the `Undo` button.
2572                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
2573                                         // Do nothing.
2574                                         break;
2575
2576                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
2577                                     default:
2578                                         // Delete the form data.
2579                                         WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
2580                                         mainWebViewDatabase.clearFormData();
2581                                 }
2582                             }
2583                         })
2584                         .show();
2585                 return true;
2586
2587             case R.id.easylist:
2588                 // Toggle the EasyList status.
2589                 easyListEnabled = !easyListEnabled;
2590
2591                 // Update the menu checkbox.
2592                 menuItem.setChecked(easyListEnabled);
2593
2594                 // Reload the main WebView.
2595                 mainWebView.reload();
2596                 return true;
2597
2598             case R.id.easyprivacy:
2599                 // Toggle the EasyPrivacy status.
2600                 easyPrivacyEnabled = !easyPrivacyEnabled;
2601
2602                 // Update the menu checkbox.
2603                 menuItem.setChecked(easyPrivacyEnabled);
2604
2605                 // Reload the main WebView.
2606                 mainWebView.reload();
2607                 return true;
2608
2609             case R.id.fanboys_annoyance_list:
2610                 // Toggle Fanboy's Annoyance List status.
2611                 fanboysAnnoyanceListEnabled = !fanboysAnnoyanceListEnabled;
2612
2613                 // Update the menu checkbox.
2614                 menuItem.setChecked(fanboysAnnoyanceListEnabled);
2615
2616                 // Update the staus of Fanboy's Social Blocking List.
2617                 MenuItem fanboysSocialBlockingListMenuItem = mainMenu.findItem(R.id.fanboys_social_blocking_list);
2618                 fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListEnabled);
2619
2620                 // Reload the main WebView.
2621                 mainWebView.reload();
2622                 return true;
2623
2624             case R.id.fanboys_social_blocking_list:
2625                 // Toggle Fanboy's Social Blocking List status.
2626                 fanboysSocialBlockingListEnabled = !fanboysSocialBlockingListEnabled;
2627
2628                 // Update the menu checkbox.
2629                 menuItem.setChecked(fanboysSocialBlockingListEnabled);
2630
2631                 // Reload the main WebView.
2632                 mainWebView.reload();
2633                 return true;
2634
2635             case R.id.ultraprivacy:
2636                 // Toggle the UltraPrivacy status.
2637                 ultraPrivacyEnabled = !ultraPrivacyEnabled;
2638
2639                 // Update the menu checkbox.
2640                 menuItem.setChecked(ultraPrivacyEnabled);
2641
2642                 // Reload the main WebView.
2643                 mainWebView.reload();
2644                 return true;
2645
2646             case R.id.block_all_third_party_requests:
2647                 //Toggle the third-party requests blocker status.
2648                 blockAllThirdPartyRequests = !blockAllThirdPartyRequests;
2649
2650                 // Update the menu checkbox.
2651                 menuItem.setChecked(blockAllThirdPartyRequests);
2652
2653                 // Reload the main WebView.
2654                 mainWebView.reload();
2655                 return true;
2656
2657             case R.id.user_agent_privacy_browser:
2658                 // Update the user agent.
2659                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
2660
2661                 // Reload the WebView.
2662                 mainWebView.reload();
2663                 return true;
2664
2665             case R.id.user_agent_webview_default:
2666                 // Update the user agent.
2667                 mainWebView.getSettings().setUserAgentString("");
2668
2669                 // Reload the WebView.
2670                 mainWebView.reload();
2671                 return true;
2672
2673             case R.id.user_agent_firefox_on_android:
2674                 // Update the user agent.
2675                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
2676
2677                 // Reload the WebView.
2678                 mainWebView.reload();
2679                 return true;
2680
2681             case R.id.user_agent_chrome_on_android:
2682                 // Update the user agent.
2683                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);
2684
2685                 // Reload the WebView.
2686                 mainWebView.reload();
2687                 return true;
2688
2689             case R.id.user_agent_safari_on_ios:
2690                 // Update the user agent.
2691                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
2692
2693                 // Reload the WebView.
2694                 mainWebView.reload();
2695                 return true;
2696
2697             case R.id.user_agent_firefox_on_linux:
2698                 // Update the user agent.
2699                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
2700
2701                 // Reload the WebView.
2702                 mainWebView.reload();
2703                 return true;
2704
2705             case R.id.user_agent_chromium_on_linux:
2706                 // Update the user agent.
2707                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
2708
2709                 // Reload the WebView.
2710                 mainWebView.reload();
2711                 return true;
2712
2713             case R.id.user_agent_firefox_on_windows:
2714                 // Update the user agent.
2715                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
2716
2717                 // Reload the WebView.
2718                 mainWebView.reload();
2719                 return true;
2720
2721             case R.id.user_agent_chrome_on_windows:
2722                 // Update the user agent.
2723                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
2724
2725                 // Reload the WebView.
2726                 mainWebView.reload();
2727                 return true;
2728
2729             case R.id.user_agent_edge_on_windows:
2730                 // Update the user agent.
2731                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
2732
2733                 // Reload the WebView.
2734                 mainWebView.reload();
2735                 return true;
2736
2737             case R.id.user_agent_internet_explorer_on_windows:
2738                 // Update the user agent.
2739                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
2740
2741                 // Reload the WebView.
2742                 mainWebView.reload();
2743                 return true;
2744
2745             case R.id.user_agent_safari_on_macos:
2746                 // Update the user agent.
2747                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
2748
2749                 // Reload the WebView.
2750                 mainWebView.reload();
2751                 return true;
2752
2753             case R.id.user_agent_custom:
2754                 // Update the user agent.
2755                 mainWebView.getSettings().setUserAgentString(defaultCustomUserAgentString);
2756
2757                 // Reload the WebView.
2758                 mainWebView.reload();
2759                 return true;
2760
2761             case R.id.font_size_twenty_five_percent:
2762                 mainWebView.getSettings().setTextZoom(25);
2763                 return true;
2764
2765             case R.id.font_size_fifty_percent:
2766                 mainWebView.getSettings().setTextZoom(50);
2767                 return true;
2768
2769             case R.id.font_size_seventy_five_percent:
2770                 mainWebView.getSettings().setTextZoom(75);
2771                 return true;
2772
2773             case R.id.font_size_one_hundred_percent:
2774                 mainWebView.getSettings().setTextZoom(100);
2775                 return true;
2776
2777             case R.id.font_size_one_hundred_twenty_five_percent:
2778                 mainWebView.getSettings().setTextZoom(125);
2779                 return true;
2780
2781             case R.id.font_size_one_hundred_fifty_percent:
2782                 mainWebView.getSettings().setTextZoom(150);
2783                 return true;
2784
2785             case R.id.font_size_one_hundred_seventy_five_percent:
2786                 mainWebView.getSettings().setTextZoom(175);
2787                 return true;
2788
2789             case R.id.font_size_two_hundred_percent:
2790                 mainWebView.getSettings().setTextZoom(200);
2791                 return true;
2792
2793             case R.id.swipe_to_refresh:
2794                 // Toggle swipe to refresh.
2795                 swipeRefreshLayout.setEnabled(!swipeRefreshLayout.isEnabled());
2796                 return true;
2797
2798             case R.id.display_images:
2799                 if (mainWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
2800                     mainWebView.getSettings().setLoadsImagesAutomatically(false);
2801                     mainWebView.reload();
2802                 } else {  // Images are not currently loaded automatically.
2803                     mainWebView.getSettings().setLoadsImagesAutomatically(true);
2804                 }
2805                 return true;
2806
2807             case R.id.night_mode:
2808                 // Toggle night mode.
2809                 nightMode = !nightMode;
2810
2811                 // Enable or disable JavaScript according to night mode, the global preference, and any domain settings.
2812                 if (nightMode) {  // Night mode is enabled.  Enable JavaScript.
2813                     // Update the global variable.
2814                     javaScriptEnabled = true;
2815                 } else if (domainSettingsApplied) {  // Night mode is disabled and domain settings are applied.  Set JavaScript according to the domain settings.
2816                     // Get the JavaScript preference that was stored the last time domain settings were loaded.
2817                     javaScriptEnabled = domainSettingsJavaScriptEnabled;
2818                 } else {  // Night mode is disabled and domain settings are not applied.  Set JavaScript according to the global preference.
2819                     // Get a handle for the shared preference.
2820                     SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
2821
2822                     // Get the JavaScript preference.
2823                     javaScriptEnabled = sharedPreferences.getBoolean("javascript", false);
2824                 }
2825
2826                 // Apply the JavaScript setting to the WebView.
2827                 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
2828
2829                 // Update the privacy icons.
2830                 updatePrivacyIcons(false);
2831
2832                 // Reload the website.
2833                 mainWebView.reload();
2834                 return true;
2835
2836             case R.id.print:
2837                 // Get a `PrintManager` instance.
2838                 PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
2839
2840                 // Convert `mainWebView` to `printDocumentAdapter`.
2841                 PrintDocumentAdapter printDocumentAdapter = mainWebView.createPrintDocumentAdapter();
2842
2843                 // Remove the lint error below that `printManager` might be `null`.
2844                 assert printManager != null;
2845
2846                 // Print the document.  The print attributes are `null`.
2847                 printManager.print(getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
2848                 return true;
2849
2850             case R.id.view_source:
2851                 // Launch the View Source activity.
2852                 Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
2853                 startActivity(viewSourceIntent);
2854                 return true;
2855
2856             case R.id.proxy_through_orbot:
2857                 // Toggle the proxy through Orbot variable.
2858                 proxyThroughOrbot = !proxyThroughOrbot;
2859
2860                 // Apply the proxy through Orbot settings.
2861                 applyProxyThroughOrbot(true);
2862                 return true;
2863
2864             case R.id.share:
2865                 // Setup the share string.
2866                 String shareString = webViewTitle + " – " + urlTextBox.getText().toString();
2867
2868                 // Create the share intent.
2869                 Intent shareIntent = new Intent(Intent.ACTION_SEND);
2870                 shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
2871                 shareIntent.setType("text/plain");
2872
2873                 // Make it so.
2874                 startActivity(Intent.createChooser(shareIntent, "Share URL"));
2875                 return true;
2876
2877             case R.id.find_on_page:
2878                 // Hide the URL app bar.
2879                 supportAppBar.setVisibility(View.GONE);
2880
2881                 // Show the Find on Page `RelativeLayout`.
2882                 findOnPageLinearLayout.setVisibility(View.VISIBLE);
2883
2884                 // Display the keyboard.  We have to wait 200 ms before running the command to work around a bug in Android.
2885                 // http://stackoverflow.com/questions/5520085/android-show-softkeyboard-with-showsoftinput-is-not-working
2886                 findOnPageEditText.postDelayed(() -> {
2887                     // Set the focus on `findOnPageEditText`.
2888                     findOnPageEditText.requestFocus();
2889
2890                     // Display the keyboard.  `0` sets no input flags.
2891                     inputMethodManager.showSoftInput(findOnPageEditText, 0);
2892                 }, 200);
2893                 return true;
2894
2895             case R.id.add_to_homescreen:
2896                 // Show the `CreateHomeScreenShortcutDialog` `AlertDialog` and name this instance `R.string.create_shortcut`.
2897                 AppCompatDialogFragment createHomeScreenShortcutDialogFragment = new CreateHomeScreenShortcutDialog();
2898                 createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
2899
2900                 //Everything else will be handled by `CreateHomeScreenShortcutDialog` and the associated listener below.
2901         &