Fix the drawer layouts on devices with notches. https://redmine.stoutner.com/issues/250
[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                     mainWebView.getSettings().setUseWideViewPort(true);
1653                 }
1654
1655                 // Flush any cookies to persistent storage.  `CookieManager` has become very lazy about flushing cookies in recent versions.
1656                 if (firstPartyCookiesEnabled && Build.VERSION.SDK_INT >= 21) {
1657                     cookieManager.flush();
1658                 }
1659
1660                 // Update the Refresh menu item if it has been created.
1661                 if (refreshMenuItem != null) {
1662                     // Reset the Refresh title.
1663                     refreshMenuItem.setTitle(R.string.refresh);
1664
1665                     // If the icon is displayed in the AppBar, reset it according to the theme.
1666                     if (displayAdditionalAppBarIcons) {
1667                         if (darkTheme) {
1668                             refreshMenuItem.setIcon(R.drawable.refresh_enabled_dark);
1669                         } else {
1670                             refreshMenuItem.setIcon(R.drawable.refresh_enabled_light);
1671                         }
1672                     }
1673                 }
1674
1675                 // Reset `urlIsLoading`, which is used to prevent reloads on redirect if the user agent changes.
1676                 urlIsLoading = false;
1677
1678                 // Clear the cache and history if Incognito Mode is enabled.
1679                 if (incognitoModeEnabled) {
1680                     // Clear the cache.  `true` includes disk files.
1681                     mainWebView.clearCache(true);
1682
1683                     // Clear the back/forward history.
1684                     mainWebView.clearHistory();
1685
1686                     // Manually delete cache folders.
1687                     try {
1688                         // Delete the main cache directory.
1689                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
1690
1691                         // Delete the secondary `Service Worker` cache directory.
1692                         // A `String[]` must be used because the directory contains a space and `Runtime.exec` will not escape the string correctly otherwise.
1693                         privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
1694                     } catch (IOException e) {
1695                         // Do nothing if an error is thrown.
1696                     }
1697                 }
1698
1699                 // Update `urlTextBox` and apply domain settings if not waiting on Orbot.
1700                 if (!waitingForOrbot) {
1701                     // Check to see if `WebView` has set `url` to be `about:blank`.
1702                     if (url.equals("about:blank")) {  // `WebView` is blank, so `formattedUrlString` should be `""` and `urlTextBox` should display a hint.
1703                         // Set `formattedUrlString` to `""`.
1704                         formattedUrlString = "";
1705
1706                         urlTextBox.setText(formattedUrlString);
1707
1708                         // Request focus for `urlTextBox`.
1709                         urlTextBox.requestFocus();
1710
1711                         // Display the keyboard.
1712                         inputMethodManager.showSoftInput(urlTextBox, 0);
1713
1714                         // Apply the domain settings.  This clears any settings from the previous domain.
1715                         applyDomainSettings(formattedUrlString, true, false);
1716                     } else {  // `WebView` has loaded a webpage.
1717                         // Set `formattedUrlString`.
1718                         formattedUrlString = url;
1719
1720                         // Only update `urlTextBox` if the user is not typing in it.
1721                         if (!urlTextBox.hasFocus()) {
1722                             // Display the formatted URL text.
1723                             urlTextBox.setText(formattedUrlString);
1724
1725                             // Apply text highlighting to `urlTextBox`.
1726                             highlightUrlText();
1727                         }
1728                     }
1729
1730                     // Store the SSL certificate so it can be accessed from `ViewSslCertificateDialog` and `PinnedSslCertificateMismatchDialog`.
1731                     sslCertificate = mainWebView.getCertificate();
1732
1733                     // 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.
1734                     // Also ignore if changes in the user agent causes an error while navigating history.
1735                     if (pinnedDomainSslCertificate && !ignorePinnedSslCertificate && navigatingHistory) {
1736                         // Initialize the current SSL certificate variables.
1737                         String currentWebsiteIssuedToCName = "";
1738                         String currentWebsiteIssuedToOName = "";
1739                         String currentWebsiteIssuedToUName = "";
1740                         String currentWebsiteIssuedByCName = "";
1741                         String currentWebsiteIssuedByOName = "";
1742                         String currentWebsiteIssuedByUName = "";
1743                         Date currentWebsiteSslStartDate = null;
1744                         Date currentWebsiteSslEndDate = null;
1745
1746
1747                         // Extract the individual pieces of information from the current website SSL certificate if it is not null.
1748                         if (sslCertificate != null) {
1749                             currentWebsiteIssuedToCName = sslCertificate.getIssuedTo().getCName();
1750                             currentWebsiteIssuedToOName = sslCertificate.getIssuedTo().getOName();
1751                             currentWebsiteIssuedToUName = sslCertificate.getIssuedTo().getUName();
1752                             currentWebsiteIssuedByCName = sslCertificate.getIssuedBy().getCName();
1753                             currentWebsiteIssuedByOName = sslCertificate.getIssuedBy().getOName();
1754                             currentWebsiteIssuedByUName = sslCertificate.getIssuedBy().getUName();
1755                             currentWebsiteSslStartDate = sslCertificate.getValidNotBeforeDate();
1756                             currentWebsiteSslEndDate = sslCertificate.getValidNotAfterDate();
1757                         }
1758
1759                         // 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`.
1760                         String currentWebsiteSslStartDateString = "";
1761                         String currentWebsiteSslEndDateString = "";
1762                         String pinnedDomainSslStartDateString = "";
1763                         String pinnedDomainSslEndDateString = "";
1764
1765                         // Convert the `Dates` to `Strings` if they are not `null`.
1766                         if (currentWebsiteSslStartDate != null) {
1767                             currentWebsiteSslStartDateString = currentWebsiteSslStartDate.toString();
1768                         }
1769
1770                         if (currentWebsiteSslEndDate != null) {
1771                             currentWebsiteSslEndDateString = currentWebsiteSslEndDate.toString();
1772                         }
1773
1774                         if (pinnedDomainSslStartDate != null) {
1775                             pinnedDomainSslStartDateString = pinnedDomainSslStartDate.toString();
1776                         }
1777
1778                         if (pinnedDomainSslEndDate != null) {
1779                             pinnedDomainSslEndDateString = pinnedDomainSslEndDate.toString();
1780                         }
1781
1782                         // Check to see if the pinned SSL certificate matches the current website certificate.
1783                         if (!currentWebsiteIssuedToCName.equals(pinnedDomainSslIssuedToCNameString) || !currentWebsiteIssuedToOName.equals(pinnedDomainSslIssuedToONameString) ||
1784                                 !currentWebsiteIssuedToUName.equals(pinnedDomainSslIssuedToUNameString) || !currentWebsiteIssuedByCName.equals(pinnedDomainSslIssuedByCNameString) ||
1785                                 !currentWebsiteIssuedByOName.equals(pinnedDomainSslIssuedByONameString) || !currentWebsiteIssuedByUName.equals(pinnedDomainSslIssuedByUNameString) ||
1786                                 !currentWebsiteSslStartDateString.equals(pinnedDomainSslStartDateString) || !currentWebsiteSslEndDateString.equals(pinnedDomainSslEndDateString)) {
1787                             // The pinned SSL certificate doesn't match the current domain certificate.
1788                             //Display the pinned SSL certificate mismatch `AlertDialog`.
1789                             AppCompatDialogFragment pinnedSslCertificateMismatchDialogFragment = new PinnedSslCertificateMismatchDialog();
1790                             pinnedSslCertificateMismatchDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_mismatch));
1791                         }
1792                     }
1793                 }
1794             }
1795
1796             // Handle SSL Certificate errors.
1797             @Override
1798             public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
1799                 // Get the current website SSL certificate.
1800                 SslCertificate currentWebsiteSslCertificate = error.getCertificate();
1801
1802                 // Extract the individual pieces of information from the current website SSL certificate.
1803                 String currentWebsiteIssuedToCName = currentWebsiteSslCertificate.getIssuedTo().getCName();
1804                 String currentWebsiteIssuedToOName = currentWebsiteSslCertificate.getIssuedTo().getOName();
1805                 String currentWebsiteIssuedToUName = currentWebsiteSslCertificate.getIssuedTo().getUName();
1806                 String currentWebsiteIssuedByCName = currentWebsiteSslCertificate.getIssuedBy().getCName();
1807                 String currentWebsiteIssuedByOName = currentWebsiteSslCertificate.getIssuedBy().getOName();
1808                 String currentWebsiteIssuedByUName = currentWebsiteSslCertificate.getIssuedBy().getUName();
1809                 Date currentWebsiteSslStartDate = currentWebsiteSslCertificate.getValidNotBeforeDate();
1810                 Date currentWebsiteSslEndDate = currentWebsiteSslCertificate.getValidNotAfterDate();
1811
1812                 // Proceed to the website if the current SSL website certificate matches the pinned domain certificate.
1813                 if (pinnedDomainSslCertificate &&
1814                         currentWebsiteIssuedToCName.equals(pinnedDomainSslIssuedToCNameString) && currentWebsiteIssuedToOName.equals(pinnedDomainSslIssuedToONameString) &&
1815                         currentWebsiteIssuedToUName.equals(pinnedDomainSslIssuedToUNameString) && currentWebsiteIssuedByCName.equals(pinnedDomainSslIssuedByCNameString) &&
1816                         currentWebsiteIssuedByOName.equals(pinnedDomainSslIssuedByONameString) && currentWebsiteIssuedByUName.equals(pinnedDomainSslIssuedByUNameString) &&
1817                         currentWebsiteSslStartDate.equals(pinnedDomainSslStartDate) && currentWebsiteSslEndDate.equals(pinnedDomainSslEndDate)) {
1818                     // An SSL certificate is pinned and matches the current domain certificate.
1819                     // Proceed to the website without displaying an error.
1820                     handler.proceed();
1821                 } else {  // Either there isn't a pinned SSL certificate or it doesn't match the current website certificate.
1822                     // Store `handler` so it can be accesses from `onSslErrorCancel()` and `onSslErrorProceed()`.
1823                     sslErrorHandler = handler;
1824
1825                     // Display the SSL error `AlertDialog`.
1826                     AppCompatDialogFragment sslCertificateErrorDialogFragment = SslCertificateErrorDialog.displayDialog(error);
1827                     sslCertificateErrorDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_error));
1828                 }
1829             }
1830         });
1831
1832         // Get the intent that started the app.
1833         Intent launchingIntent = getIntent();
1834
1835         // Get the information from the intent.
1836         String launchingIntentAction = launchingIntent.getAction();
1837         Uri launchingIntentUriData = launchingIntent.getData();
1838
1839         // If the intent action is a web search, perform the search.
1840         if ((launchingIntentAction != null) && launchingIntentAction.equals(Intent.ACTION_WEB_SEARCH)) {
1841             // Create an encoded URL string.
1842             String encodedUrlString;
1843
1844             // Sanitize the search input and convert it to a search.
1845             try {
1846                 encodedUrlString = URLEncoder.encode(launchingIntent.getStringExtra(SearchManager.QUERY), "UTF-8");
1847             } catch (UnsupportedEncodingException exception) {
1848                 encodedUrlString = "";
1849             }
1850
1851             // Add the base search URL.
1852             formattedUrlString = searchURL + encodedUrlString;
1853         } else if (launchingIntentUriData != null){  // Check to see if the intent contains a new URL.
1854             // Set the formatted URL string.
1855             formattedUrlString = launchingIntentUriData.toString();
1856         }
1857
1858         // Load the website if not waiting for Orbot to connect.
1859         if (!waitingForOrbot) {
1860             loadUrl(formattedUrlString);
1861         }
1862     }
1863
1864     @Override
1865     protected void onNewIntent(Intent intent) {
1866         // Sets the new intent as the activity intent, so that any future `getIntent()`s pick up this one instead of creating a new activity.
1867         setIntent(intent);
1868
1869         // Get the information from the intent.
1870         String intentAction = intent.getAction();
1871         Uri intentUriData = intent.getData();
1872
1873         // If the intent action is a web search, perform the search.
1874         if ((intentAction != null) && intentAction.equals(Intent.ACTION_WEB_SEARCH)) {
1875             // Create an encoded URL string.
1876             String encodedUrlString;
1877
1878             // Sanitize the search input and convert it to a search.
1879             try {
1880                 encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
1881             } catch (UnsupportedEncodingException exception) {
1882                 encodedUrlString = "";
1883             }
1884
1885             // Add the base search URL.
1886             formattedUrlString = searchURL + encodedUrlString;
1887         } else if (intentUriData != null){  // Check to see if the intent contains a new URL.
1888             // Set the formatted URL string.
1889             formattedUrlString = intentUriData.toString();
1890         }
1891
1892         // Load the URL.
1893         loadUrl(formattedUrlString);
1894
1895         // Close the navigation drawer if it is open.
1896         if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
1897             drawerLayout.closeDrawer(GravityCompat.START);
1898         }
1899
1900         // Close the bookmarks drawer if it is open.
1901         if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
1902             drawerLayout.closeDrawer(GravityCompat.END);
1903         }
1904
1905         // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
1906         mainWebView.requestFocus();
1907     }
1908
1909     @Override
1910     public void onRestart() {
1911         // Run the default commands.
1912         super.onRestart();
1913
1914         // Make sure Orbot is running if Privacy Browser is proxying through Orbot.
1915         if (proxyThroughOrbot) {
1916             // Request Orbot to start.  If Orbot is already running no hard will be caused by this request.
1917             Intent orbotIntent = new Intent("org.torproject.android.intent.action.START");
1918
1919             // Send the intent to the Orbot package.
1920             orbotIntent.setPackage("org.torproject.android");
1921
1922             // Make it so.
1923             sendBroadcast(orbotIntent);
1924         }
1925
1926         // Apply the app settings if returning from the Settings activity..
1927         if (reapplyAppSettingsOnRestart) {
1928             // Apply the app settings.
1929             applyAppSettings();
1930
1931             // Reload the webpage if displaying of images has been disabled in the Settings activity.
1932             if (reloadOnRestart) {
1933                 // Reload `mainWebView`.
1934                 mainWebView.reload();
1935
1936                 // Reset `reloadOnRestartBoolean`.
1937                 reloadOnRestart = false;
1938             }
1939
1940             // Reset the return from settings flag.
1941             reapplyAppSettingsOnRestart = false;
1942         }
1943
1944         // Apply the domain settings if returning from the Domains activity.
1945         if (reapplyDomainSettingsOnRestart) {
1946             // Reapply the domain settings.
1947             applyDomainSettings(formattedUrlString, false, true);
1948
1949             // Reset `reapplyDomainSettingsOnRestart`.
1950             reapplyDomainSettingsOnRestart = false;
1951         }
1952
1953         // Load the URL on restart to apply changes to night mode.
1954         if (loadUrlOnRestart) {
1955             // Load the current `formattedUrlString`.
1956             loadUrl(formattedUrlString);
1957
1958             // Reset `loadUrlOnRestart.
1959             loadUrlOnRestart = false;
1960         }
1961
1962         // Update the bookmarks drawer if returning from the Bookmarks activity.
1963         if (restartFromBookmarksActivity) {
1964             // Close the bookmarks drawer.
1965             drawerLayout.closeDrawer(GravityCompat.END);
1966
1967             // Reload the bookmarks drawer.
1968             loadBookmarksFolder();
1969
1970             // Reset `restartFromBookmarksActivity`.
1971             restartFromBookmarksActivity = false;
1972         }
1973
1974         // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
1975         updatePrivacyIcons(true);
1976     }
1977
1978     // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
1979     @Override
1980     public void onResume() {
1981         // Run the default commands.
1982         super.onResume();
1983
1984         // Resume JavaScript (if enabled).
1985         mainWebView.resumeTimers();
1986
1987         // Resume `mainWebView`.
1988         mainWebView.onResume();
1989
1990         // Resume the adView for the free flavor.
1991         if (BuildConfig.FLAVOR.contentEquals("free")) {
1992             // Resume the ad.
1993             AdHelper.resumeAd(findViewById(R.id.adview));
1994         }
1995
1996         // Display a message to the user if waiting for Orbot.
1997         if (waitingForOrbot && !orbotStatus.equals("ON")) {
1998             // Disable the wide view port so that the waiting for Orbot text is displayed correctly.
1999             mainWebView.getSettings().setUseWideViewPort(false);
2000
2001             // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
2002             mainWebView.loadData(waitingForOrbotHtmlString, "text/html", null);
2003         }
2004
2005         if (displayingFullScreenVideo) {
2006             // Remove the translucent overlays.
2007             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
2008
2009             // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
2010             drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
2011
2012             /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
2013              * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
2014              * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
2015              */
2016             rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
2017         }
2018     }
2019
2020     @Override
2021     public void onPause() {
2022         // Run the default commands.
2023         super.onPause();
2024
2025         // Pause `mainWebView`.
2026         mainWebView.onPause();
2027
2028         // Stop all JavaScript.
2029         mainWebView.pauseTimers();
2030
2031         // Pause the ad or it will continue to consume resources in the background on the free flavor.
2032         if (BuildConfig.FLAVOR.contentEquals("free")) {
2033             // Pause the ad.
2034             AdHelper.pauseAd(findViewById(R.id.adview));
2035         }
2036     }
2037
2038     @Override
2039     public void onDestroy() {
2040         // Unregister the Orbot status broadcast receiver.
2041         this.unregisterReceiver(orbotStatusBroadcastReceiver);
2042
2043         // Close the bookmarks cursor and database.
2044         bookmarksCursor.close();
2045         bookmarksDatabaseHelper.close();
2046
2047         // Run the default commands.
2048         super.onDestroy();
2049     }
2050
2051     @Override
2052     public boolean onCreateOptionsMenu(Menu menu) {
2053         // Inflate the menu; this adds items to the action bar if it is present.
2054         getMenuInflater().inflate(R.menu.webview_options_menu, menu);
2055
2056         // Set mainMenu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons`.
2057         mainMenu = menu;
2058
2059         // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
2060         updatePrivacyIcons(false);
2061
2062         // Get handles for the menu items.
2063         MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
2064         MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
2065         MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
2066         MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
2067         MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
2068         refreshMenuItem = menu.findItem(R.id.refresh);
2069         blocklistsMenuItem = menu.findItem(R.id.blocklists);
2070         easyListMenuItem = menu.findItem(R.id.easylist);
2071         easyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
2072         fanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
2073         fanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
2074         ultraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
2075         blockAllThirdPartyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
2076         MenuItem adConsentMenuItem = menu.findItem(R.id.ad_consent);
2077
2078         // Only display third-party cookies if API >= 21
2079         toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
2080
2081         // Only display the form data menu items if the API < 26.
2082         toggleSaveFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
2083         clearFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
2084
2085         // Only show Ad Consent if this is the free flavor.
2086         adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
2087
2088         // Get the shared preference values.
2089         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
2090
2091         // Get the status of the additional AppBar icons.
2092         displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
2093
2094         // 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.
2095         if (displayAdditionalAppBarIcons) {
2096             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
2097             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
2098             refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
2099         } else { //Do not display the additional icons.
2100             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
2101             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
2102             refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
2103         }
2104
2105         // Replace Refresh with Stop if a URL is already loading.
2106         if (urlIsLoading) {
2107             // Set the title.
2108             refreshMenuItem.setTitle(R.string.stop);
2109
2110             // If the icon is displayed in the AppBar, set it according to the theme.
2111             if (displayAdditionalAppBarIcons) {
2112                 if (darkTheme) {
2113                     refreshMenuItem.setIcon(R.drawable.close_dark);
2114                 } else {
2115                     refreshMenuItem.setIcon(R.drawable.close_light);
2116                 }
2117             }
2118         }
2119
2120         return true;
2121     }
2122
2123     @Override
2124     public boolean onPrepareOptionsMenu(Menu menu) {
2125         // Get handles for the menu items.
2126         MenuItem addOrEditDomain = menu.findItem(R.id.add_or_edit_domain);
2127         MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
2128         MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
2129         MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
2130         MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
2131         MenuItem clearDataMenuItem = menu.findItem(R.id.clear_data);
2132         MenuItem clearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
2133         MenuItem clearDOMStorageMenuItem = menu.findItem(R.id.clear_dom_storage);
2134         MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
2135         MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
2136         MenuItem swipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
2137         MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
2138         MenuItem nightModeMenuItem = menu.findItem(R.id.night_mode);
2139         MenuItem proxyThroughOrbotMenuItem = menu.findItem(R.id.proxy_through_orbot);
2140
2141         // Set the text for the domain menu item.
2142         if (domainSettingsApplied) {
2143             addOrEditDomain.setTitle(R.string.edit_domain_settings);
2144         } else {
2145             addOrEditDomain.setTitle(R.string.add_domain_settings);
2146         }
2147
2148         // Set the status of the menu item checkboxes.
2149         toggleFirstPartyCookiesMenuItem.setChecked(firstPartyCookiesEnabled);
2150         toggleThirdPartyCookiesMenuItem.setChecked(thirdPartyCookiesEnabled);
2151         toggleDomStorageMenuItem.setChecked(domStorageEnabled);
2152         toggleSaveFormDataMenuItem.setChecked(saveFormDataEnabled);  // Form data can be removed once the minimum API >= 26.
2153         easyListMenuItem.setChecked(easyListEnabled);
2154         easyPrivacyMenuItem.setChecked(easyPrivacyEnabled);
2155         fanboysAnnoyanceListMenuItem.setChecked(fanboysAnnoyanceListEnabled);
2156         fanboysSocialBlockingListMenuItem.setChecked(fanboysSocialBlockingListEnabled);
2157         ultraPrivacyMenuItem.setChecked(ultraPrivacyEnabled);
2158         blockAllThirdPartyRequestsMenuItem.setChecked(blockAllThirdPartyRequests);
2159         swipeToRefreshMenuItem.setChecked(swipeRefreshLayout.isEnabled());
2160         displayImagesMenuItem.setChecked(mainWebView.getSettings().getLoadsImagesAutomatically());
2161         nightModeMenuItem.setChecked(nightMode);
2162         proxyThroughOrbotMenuItem.setChecked(proxyThroughOrbot);
2163
2164         // Enable third-party cookies if first-party cookies are enabled.
2165         toggleThirdPartyCookiesMenuItem.setEnabled(firstPartyCookiesEnabled);
2166
2167         // Enable DOM Storage if JavaScript is enabled.
2168         toggleDomStorageMenuItem.setEnabled(javaScriptEnabled);
2169
2170         // Enable Clear Cookies if there are any.
2171         clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
2172
2173         // Get a count of the number of files in the Local Storage directory.
2174         File localStorageDirectory = new File (privateDataDirectoryString + "/app_webview/Local Storage/");
2175         int localStorageDirectoryNumberOfFiles = 0;
2176         if (localStorageDirectory.exists()) {
2177             localStorageDirectoryNumberOfFiles = localStorageDirectory.list().length;
2178         }
2179
2180         // Get a count of the number of files in the IndexedDB directory.
2181         File indexedDBDirectory = new File (privateDataDirectoryString + "/app_webview/IndexedDB");
2182         int indexedDBDirectoryNumberOfFiles = 0;
2183         if (indexedDBDirectory.exists()) {
2184             indexedDBDirectoryNumberOfFiles = indexedDBDirectory.list().length;
2185         }
2186
2187         // Enable Clear DOM Storage if there is any.
2188         clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
2189
2190         // Enable Clear Form Data is there is any.  This can be removed once the minimum API >= 26.
2191         if (Build.VERSION.SDK_INT < 26) {
2192             WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(this);
2193             clearFormDataMenuItem.setEnabled(mainWebViewDatabase.hasFormData());
2194         } else {
2195             // Disable clear form data because it is not supported on current version of Android.
2196             clearFormDataMenuItem.setEnabled(false);
2197         }
2198
2199         // Enable Clear Data if any of the submenu items are enabled.
2200         clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
2201
2202         // Disable Fanboy's Social Blocking List if Fanboy's Annoyance List is checked.
2203         fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListEnabled);
2204
2205         // Initialize the display names for the blocklists with the number of blocked requests.
2206         blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + blockedRequests);
2207         easyListMenuItem.setTitle(easyListBlockedRequests + " - " + getString(R.string.easylist));
2208         easyPrivacyMenuItem.setTitle(easyPrivacyBlockedRequests + " - " + getString(R.string.easyprivacy));
2209         fanboysAnnoyanceListMenuItem.setTitle(fanboysAnnoyanceListBlockedRequests + " - " + getString(R.string.fanboys_annoyance_list));
2210         fanboysSocialBlockingListMenuItem.setTitle(fanboysSocialBlockingListBlockedRequests + " - " + getString(R.string.fanboys_social_blocking_list));
2211         ultraPrivacyMenuItem.setTitle(ultraPrivacyBlockedRequests + " - " + getString(R.string.ultraprivacy));
2212         blockAllThirdPartyRequestsMenuItem.setTitle(thirdPartyBlockedRequests + " - " + getString(R.string.block_all_third_party_requests));
2213
2214         // Get the current user agent.
2215         String currentUserAgent = mainWebView.getSettings().getUserAgentString();
2216
2217         // Select the current user agent menu item.  A switch statement cannot be used because the user agents are not compile time constants.
2218         if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[0])) {  // Privacy Browser.
2219             menu.findItem(R.id.user_agent_privacy_browser).setChecked(true);
2220         } else if (currentUserAgent.equals(webViewDefaultUserAgent)) {  // WebView Default.
2221             menu.findItem(R.id.user_agent_webview_default).setChecked(true);
2222         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[2])) {  // Firefox on Android.
2223             menu.findItem(R.id.user_agent_firefox_on_android).setChecked(true);
2224         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[3])) {  // Chrome on Android.
2225             menu.findItem(R.id.user_agent_chrome_on_android).setChecked(true);
2226         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[4])) {  // Safari on iOS.
2227             menu.findItem(R.id.user_agent_safari_on_ios).setChecked(true);
2228         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[5])) {  // Firefox on Linux.
2229             menu.findItem(R.id.user_agent_firefox_on_linux).setChecked(true);
2230         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[6])) {  // Chromium on Linux.
2231             menu.findItem(R.id.user_agent_chromium_on_linux).setChecked(true);
2232         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[7])) {  // Firefox on Windows.
2233             menu.findItem(R.id.user_agent_firefox_on_windows).setChecked(true);
2234         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[8])) {  // Chrome on Windows.
2235             menu.findItem(R.id.user_agent_chrome_on_windows).setChecked(true);
2236         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[9])) {  // Edge on Windows.
2237             menu.findItem(R.id.user_agent_edge_on_windows).setChecked(true);
2238         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[10])) {  // Internet Explorer on Windows.
2239             menu.findItem(R.id.user_agent_internet_explorer_on_windows).setChecked(true);
2240         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[11])) {  // Safari on macOS.
2241             menu.findItem(R.id.user_agent_safari_on_macos).setChecked(true);
2242         } else {  // Custom user agent.
2243             menu.findItem(R.id.user_agent_custom).setChecked(true);
2244         }
2245
2246         // Initialize font size variables.
2247         int fontSize = mainWebView.getSettings().getTextZoom();
2248         String fontSizeTitle;
2249         MenuItem selectedFontSizeMenuItem;
2250
2251         // Prepare the font size title and current size menu item.
2252         switch (fontSize) {
2253             case 25:
2254                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.twenty_five_percent);
2255                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_twenty_five_percent);
2256                 break;
2257
2258             case 50:
2259                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
2260                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
2261                 break;
2262
2263             case 75:
2264                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.seventy_five_percent);
2265                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_seventy_five_percent);
2266                 break;
2267
2268             case 100:
2269                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
2270                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
2271                 break;
2272
2273             case 125:
2274                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_twenty_five_percent);
2275                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_twenty_five_percent);
2276                 break;
2277
2278             case 150:
2279                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_fifty_percent);
2280                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_fifty_percent);
2281                 break;
2282
2283             case 175:
2284                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_seventy_five_percent);
2285                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_seventy_five_percent);
2286                 break;
2287
2288             case 200:
2289                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.two_hundred_percent);
2290                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_two_hundred_percent);
2291                 break;
2292
2293             default:
2294                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
2295                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
2296                 break;
2297         }
2298
2299         // Set the font size title and select the current size menu item.
2300         fontSizeMenuItem.setTitle(fontSizeTitle);
2301         selectedFontSizeMenuItem.setChecked(true);
2302
2303         // Run all the other default commands.
2304         super.onPrepareOptionsMenu(menu);
2305
2306         // Display the menu.
2307         return true;
2308     }
2309
2310     @Override
2311     // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
2312     @SuppressLint("SetJavaScriptEnabled")
2313     // removeAllCookies is deprecated, but it is required for API < 21.
2314     @SuppressWarnings("deprecation")
2315     public boolean onOptionsItemSelected(MenuItem menuItem) {
2316         // Get the selected menu item ID.
2317         int menuItemId = menuItem.getItemId();
2318
2319         // Set the commands that relate to the menu entries.
2320         switch (menuItemId) {
2321             case R.id.toggle_javascript:
2322                 // Switch the status of javaScriptEnabled.
2323                 javaScriptEnabled = !javaScriptEnabled;
2324
2325                 // Apply the new JavaScript status.
2326                 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
2327
2328                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2329                 updatePrivacyIcons(true);
2330
2331                 // Display a `Snackbar`.
2332                 if (javaScriptEnabled) {  // JavaScrip is enabled.
2333                     Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
2334                 } else if (firstPartyCookiesEnabled) {  // JavaScript is disabled, but first-party cookies are enabled.
2335                     Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
2336                 } else {  // Privacy mode.
2337                     Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
2338                 }
2339
2340                 // Reload the WebView.
2341                 mainWebView.reload();
2342                 return true;
2343
2344             case R.id.add_or_edit_domain:
2345                 if (domainSettingsApplied) {  // Edit the current domain settings.
2346                     // Reapply the domain settings on returning to `MainWebViewActivity`.
2347                     reapplyDomainSettingsOnRestart = true;
2348                     currentDomainName = "";
2349
2350                     // Create an intent to launch the domains activity.
2351                     Intent domainsIntent = new Intent(this, DomainsActivity.class);
2352
2353                     // Put extra information instructing the domains activity to directly load the current domain and close on back instead of returning to the domains list.
2354                     domainsIntent.putExtra("loadDomain", domainSettingsDatabaseId);
2355                     domainsIntent.putExtra("closeOnBack", true);
2356
2357                     // Make it so.
2358                     startActivity(domainsIntent);
2359                 } else {  // Add a new domain.
2360                     // Apply the new domain settings on returning to `MainWebViewActivity`.
2361                     reapplyDomainSettingsOnRestart = true;
2362                     currentDomainName = "";
2363
2364                     // Get the current domain
2365                     Uri currentUri = Uri.parse(formattedUrlString);
2366                     String currentDomain = currentUri.getHost();
2367
2368                     // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
2369                     DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
2370
2371                     // Create the domain and store the database ID.
2372                     int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
2373
2374                     // Create an intent to launch the domains activity.
2375                     Intent domainsIntent = new Intent(this, DomainsActivity.class);
2376
2377                     // Put extra information instructing the domains activity to directly load the new domain and close on back instead of returning to the domains list.
2378                     domainsIntent.putExtra("loadDomain", newDomainDatabaseId);
2379                     domainsIntent.putExtra("closeOnBack", true);
2380
2381                     // Make it so.
2382                     startActivity(domainsIntent);
2383                 }
2384                 return true;
2385
2386             case R.id.toggle_first_party_cookies:
2387                 // Switch the status of firstPartyCookiesEnabled.
2388                 firstPartyCookiesEnabled = !firstPartyCookiesEnabled;
2389
2390                 // Update the menu checkbox.
2391                 menuItem.setChecked(firstPartyCookiesEnabled);
2392
2393                 // Apply the new cookie status.
2394                 cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
2395
2396                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2397                 updatePrivacyIcons(true);
2398
2399                 // Display a `Snackbar`.
2400                 if (firstPartyCookiesEnabled) {  // First-party cookies are enabled.
2401                     Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
2402                 } else if (javaScriptEnabled) {  // JavaScript is still enabled.
2403                     Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
2404                 } else {  // Privacy mode.
2405                     Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
2406                 }
2407
2408                 // Reload the WebView.
2409                 mainWebView.reload();
2410                 return true;
2411
2412             case R.id.toggle_third_party_cookies:
2413                 if (Build.VERSION.SDK_INT >= 21) {
2414                     // Switch the status of thirdPartyCookiesEnabled.
2415                     thirdPartyCookiesEnabled = !thirdPartyCookiesEnabled;
2416
2417                     // Update the menu checkbox.
2418                     menuItem.setChecked(thirdPartyCookiesEnabled);
2419
2420                     // Apply the new cookie status.
2421                     cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
2422
2423                     // Display a `Snackbar`.
2424                     if (thirdPartyCookiesEnabled) {
2425                         Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
2426                     } else {
2427                         Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
2428                     }
2429
2430                     // Reload the WebView.
2431                     mainWebView.reload();
2432                 } // Else do nothing because SDK < 21.
2433                 return true;
2434
2435             case R.id.toggle_dom_storage:
2436                 // Switch the status of domStorageEnabled.
2437                 domStorageEnabled = !domStorageEnabled;
2438
2439                 // Update the menu checkbox.
2440                 menuItem.setChecked(domStorageEnabled);
2441
2442                 // Apply the new DOM Storage status.
2443                 mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
2444
2445                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2446                 updatePrivacyIcons(true);
2447
2448                 // Display a `Snackbar`.
2449                 if (domStorageEnabled) {
2450                     Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
2451                 } else {
2452                     Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
2453                 }
2454
2455                 // Reload the WebView.
2456                 mainWebView.reload();
2457                 return true;
2458
2459             // Form data can be removed once the minimum API >= 26.
2460             case R.id.toggle_save_form_data:
2461                 // Switch the status of saveFormDataEnabled.
2462                 saveFormDataEnabled = !saveFormDataEnabled;
2463
2464                 // Update the menu checkbox.
2465                 menuItem.setChecked(saveFormDataEnabled);
2466
2467                 // Apply the new form data status.
2468                 mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
2469
2470                 // Display a `Snackbar`.
2471                 if (saveFormDataEnabled) {
2472                     Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
2473                 } else {
2474                     Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
2475                 }
2476
2477                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2478                 updatePrivacyIcons(true);
2479
2480                 // Reload the WebView.
2481                 mainWebView.reload();
2482                 return true;
2483
2484             case R.id.clear_cookies:
2485                 Snackbar.make(findViewById(R.id.main_webview), R.string.cookies_deleted, Snackbar.LENGTH_LONG)
2486                         .setAction(R.string.undo, v -> {
2487                             // Do nothing because everything will be handled by `onDismissed()` below.
2488                         })
2489                         .addCallback(new Snackbar.Callback() {
2490                             @Override
2491                             public void onDismissed(Snackbar snackbar, int event) {
2492                                 switch (event) {
2493                                     // The user pushed the `Undo` button.
2494                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
2495                                         // Do nothing.
2496                                         break;
2497
2498                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
2499                                     default:
2500                                         // `cookieManager.removeAllCookie()` varies by SDK.
2501                                         if (Build.VERSION.SDK_INT < 21) {
2502                                             cookieManager.removeAllCookie();
2503                                         } else {
2504                                             // `null` indicates no callback.
2505                                             cookieManager.removeAllCookies(null);
2506                                         }
2507                                 }
2508                             }
2509                         })
2510                         .show();
2511                 return true;
2512
2513             case R.id.clear_dom_storage:
2514                 Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
2515                         .setAction(R.string.undo, v -> {
2516                             // Do nothing because everything will be handled by `onDismissed()` below.
2517                         })
2518                         .addCallback(new Snackbar.Callback() {
2519                             @Override
2520                             public void onDismissed(Snackbar snackbar, int event) {
2521                                 switch (event) {
2522                                     // The user pushed the `Undo` button.
2523                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
2524                                         // Do nothing.
2525                                         break;
2526
2527                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
2528                                     default:
2529                                         // Delete the DOM Storage.
2530                                         WebStorage webStorage = WebStorage.getInstance();
2531                                         webStorage.deleteAllData();
2532
2533                                         // Initialize a handler to manually delete the DOM storage files and directories.
2534                                         Handler deleteDomStorageHandler = new Handler();
2535
2536                                         // Setup a runnable to manually delete the DOM storage files and directories.
2537                                         Runnable deleteDomStorageRunnable = () -> {
2538                                             try {
2539                                                 // A `String[]` must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
2540                                                 privacyBrowserRuntime.exec(new String[]{"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
2541
2542                                                 // Multiple commands must be used because `Runtime.exec()` does not like `*`.
2543                                                 privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
2544                                                 privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
2545                                                 privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
2546                                                 privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
2547                                             } catch (IOException e) {
2548                                                 // Do nothing if an error is thrown.
2549                                             }
2550                                         };
2551
2552                                         // Manually delete the DOM storage files after 200 milliseconds.
2553                                         deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
2554                                 }
2555                             }
2556                         })
2557                         .show();
2558                 return true;
2559
2560             // Form data can be remove once the minimum API >= 26.
2561             case R.id.clear_form_data:
2562                 Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_deleted, Snackbar.LENGTH_LONG)
2563                         .setAction(R.string.undo, v -> {
2564                             // Do nothing because everything will be handled by `onDismissed()` below.
2565                         })
2566                         .addCallback(new Snackbar.Callback() {
2567                             @Override
2568                             public void onDismissed(Snackbar snackbar, int event) {
2569                                 switch (event) {
2570                                     // The user pushed the `Undo` button.
2571                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
2572                                         // Do nothing.
2573                                         break;
2574
2575                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
2576                                     default:
2577                                         // Delete the form data.
2578                                         WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
2579