977accd39c1b8dbbfc5d3138546020e90be77622
[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.content.ActivityNotFoundException;
30 import android.content.BroadcastReceiver;
31 import android.content.ClipData;
32 import android.content.ClipboardManager;
33 import android.content.Context;
34 import android.content.Intent;
35 import android.content.IntentFilter;
36 import android.content.SharedPreferences;
37 import android.content.pm.PackageManager;
38 import android.content.res.Configuration;
39 import android.database.Cursor;
40 import android.graphics.Bitmap;
41 import android.graphics.BitmapFactory;
42 import android.graphics.Typeface;
43 import android.graphics.drawable.BitmapDrawable;
44 import android.graphics.drawable.Drawable;
45 import android.net.Uri;
46 import android.net.http.SslCertificate;
47 import android.net.http.SslError;
48 import android.os.Build;
49 import android.os.Bundle;
50 import android.os.Environment;
51 import android.os.Handler;
52 import android.preference.PreferenceManager;
53 import android.print.PrintDocumentAdapter;
54 import android.print.PrintManager;
55 import android.support.annotation.NonNull;
56 import android.support.design.widget.CoordinatorLayout;
57 import android.support.design.widget.FloatingActionButton;
58 import android.support.design.widget.NavigationView;
59 import android.support.design.widget.Snackbar;
60 import android.support.v4.app.ActivityCompat;
61 import android.support.v4.content.ContextCompat;
62 // `ShortcutInfoCompat`, `ShortcutManagerCompat`, and `IconCompat` can be switched to the non-compat version once API >= 26.
63 import android.support.v4.content.pm.ShortcutInfoCompat;
64 import android.support.v4.content.pm.ShortcutManagerCompat;
65 import android.support.v4.graphics.drawable.IconCompat;
66 import android.support.v4.view.GravityCompat;
67 import android.support.v4.widget.DrawerLayout;
68 import android.support.v4.widget.SwipeRefreshLayout;
69 import android.support.v7.app.ActionBar;
70 import android.support.v7.app.ActionBarDrawerToggle;
71 import android.support.v7.app.AppCompatActivity;
72 import android.support.v7.app.AppCompatDialogFragment;
73 import android.support.v7.widget.Toolbar;
74 import android.text.Editable;
75 import android.text.Spanned;
76 import android.text.TextWatcher;
77 import android.text.style.ForegroundColorSpan;
78 import android.util.Patterns;
79 import android.view.ContextMenu;
80 import android.view.GestureDetector;
81 import android.view.KeyEvent;
82 import android.view.Menu;
83 import android.view.MenuItem;
84 import android.view.MotionEvent;
85 import android.view.View;
86 import android.view.ViewGroup;
87 import android.view.WindowManager;
88 import android.view.inputmethod.InputMethodManager;
89 import android.webkit.CookieManager;
90 import android.webkit.HttpAuthHandler;
91 import android.webkit.SslErrorHandler;
92 import android.webkit.ValueCallback;
93 import android.webkit.WebBackForwardList;
94 import android.webkit.WebChromeClient;
95 import android.webkit.WebResourceResponse;
96 import android.webkit.WebStorage;
97 import android.webkit.WebView;
98 import android.webkit.WebViewClient;
99 import android.webkit.WebViewDatabase;
100 import android.widget.ArrayAdapter;
101 import android.widget.CursorAdapter;
102 import android.widget.EditText;
103 import android.widget.FrameLayout;
104 import android.widget.ImageView;
105 import android.widget.LinearLayout;
106 import android.widget.ListView;
107 import android.widget.ProgressBar;
108 import android.widget.RadioButton;
109 import android.widget.RelativeLayout;
110 import android.widget.TextView;
111
112 import com.stoutner.privacybrowser.BuildConfig;
113 import com.stoutner.privacybrowser.R;
114 import com.stoutner.privacybrowser.dialogs.AdConsentDialog;
115 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
116 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
117 import com.stoutner.privacybrowser.dialogs.CreateHomeScreenShortcutDialog;
118 import com.stoutner.privacybrowser.dialogs.DownloadImageDialog;
119 import com.stoutner.privacybrowser.dialogs.DownloadLocationPermissionDialog;
120 import com.stoutner.privacybrowser.dialogs.EditBookmarkDialog;
121 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
122 import com.stoutner.privacybrowser.dialogs.HttpAuthenticationDialog;
123 import com.stoutner.privacybrowser.dialogs.PinnedSslCertificateMismatchDialog;
124 import com.stoutner.privacybrowser.dialogs.UrlHistoryDialog;
125 import com.stoutner.privacybrowser.dialogs.ViewSslCertificateDialog;
126 import com.stoutner.privacybrowser.helpers.AdHelper;
127 import com.stoutner.privacybrowser.helpers.BlockListHelper;
128 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
129 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
130 import com.stoutner.privacybrowser.helpers.OrbotProxyHelper;
131 import com.stoutner.privacybrowser.dialogs.DownloadFileDialog;
132 import com.stoutner.privacybrowser.dialogs.SslCertificateErrorDialog;
133
134 import java.io.ByteArrayInputStream;
135 import java.io.ByteArrayOutputStream;
136 import java.io.File;
137 import java.io.IOException;
138 import java.io.UnsupportedEncodingException;
139 import java.net.MalformedURLException;
140 import java.net.URL;
141 import java.net.URLDecoder;
142 import java.net.URLEncoder;
143 import java.util.ArrayList;
144 import java.util.Date;
145 import java.util.HashMap;
146 import java.util.HashSet;
147 import java.util.List;
148 import java.util.Map;
149 import java.util.Set;
150
151 // AppCompatActivity from android.support.v7.app.AppCompatActivity must be used to have access to the SupportActionBar until the minimum API is >= 21.
152 public class MainWebViewActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener,
153         CreateHomeScreenShortcutDialog.CreateHomeScreenShortcutListener, DownloadFileDialog.DownloadFileListener, DownloadImageDialog.DownloadImageListener,
154         DownloadLocationPermissionDialog.DownloadLocationPermissionDialogListener, EditBookmarkDialog.EditBookmarkListener, EditBookmarkFolderDialog.EditBookmarkFolderListener,
155         HttpAuthenticationDialog.HttpAuthenticationListener, NavigationView.OnNavigationItemSelectedListener, PinnedSslCertificateMismatchDialog.PinnedSslCertificateMismatchListener,
156         SslCertificateErrorDialog.SslCertificateErrorListener, UrlHistoryDialog.UrlHistoryListener {
157
158     // `darkTheme` is public static so it can be accessed from everywhere.
159     public static boolean darkTheme;
160
161     // `allowScreenshots` is public static so it can be accessed from everywhere.  It is also used in `onCreate()`.
162     public static boolean allowScreenshots;
163
164     // `favoriteIconBitmap` is public static so it can be accessed from `CreateHomeScreenShortcutDialog`, `BookmarksActivity`, `BookmarksDatabaseViewActivity`, `CreateBookmarkDialog`,
165     // `CreateBookmarkFolderDialog`, `EditBookmarkDialog`, `EditBookmarkFolderDialog`, `EditBookmarkDatabaseViewDialog`, and `ViewSslCertificateDialog`.  It is also used in `onCreate()`,
166     // `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onCreateHomeScreenShortcutCreate()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `applyDomainSettings()`.
167     public static Bitmap favoriteIconBitmap;
168
169     // `formattedUrlString` is public static so it can be accessed from `BookmarksActivity`, `CreateBookmarkDialog`, and `AddDomainDialog`.
170     // It is also used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onCreateHomeScreenShortcutCreate()`, and `loadUrlFromTextBox()`.
171     public static String formattedUrlString;
172
173     // `sslCertificate` is public static so it can be accessed from `DomainsActivity`, `DomainsListFragment`, `DomainSettingsFragment`, `PinnedSslCertificateMismatchDialog`,
174     // and `ViewSslCertificateDialog`.  It is also used in `onCreate()`.
175     public static SslCertificate sslCertificate;
176
177     // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()` and `onResume()`.
178     public static String orbotStatus;
179
180     // `webViewTitle` is public static so it can be accessed from `CreateBookmarkDialog` and `CreateHomeScreenShortcutDialog`.  It is also used in `onCreate()`.
181     public static String webViewTitle;
182
183     // `appliedUserAgentString` is public static so it can be accessed from `ViewSourceActivity`.  It is also used in `applyDomainSettings()`.
184     public static String appliedUserAgentString;
185
186     // `reloadOnRestart` is public static so it can be accessed from `SettingsFragment`.  It is also used in `onRestart()`
187     public static boolean reloadOnRestart;
188
189     // `reloadUrlOnRestart` is public static so it can be accessed from `SettingsFragment` and `BookmarksActivity`.  It is also used in `onRestart()`.
190     public static boolean loadUrlOnRestart;
191
192     // `restartFromBookmarksActivity` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onRestart()`.
193     public static boolean restartFromBookmarksActivity;
194
195     // The block list versions are public static so they can be accessed from `AboutTabFragment`.  They are also used in `onCreate()`.
196     public static String easyListVersion;
197     public static String easyPrivacyVersion;
198     public static String fanboysAnnoyanceVersion;
199     public static String fanboysSocialVersion;
200     public static String ultraPrivacyVersion;
201
202     // The request items are public static so they can be accessed by `BlockListHelper`, `RequestsArrayAdapter`, and `ViewRequestsDialog`.  They are also used in `onCreate()` and `onPrepareOptionsMenu()`.
203     public static List<String[]> resourceRequests;
204     public static String[] whiteListResultStringArray;
205     private int blockedRequests;
206     private int easyListBlockedRequests;
207     private int easyPrivacyBlockedRequests;
208     private int fanboysAnnoyanceListBlockedRequests;
209     private int fanboysSocialBlockingListBlockedRequests;
210     private int ultraPrivacyBlockedRequests;
211     private int thirdPartyBlockedRequests;
212
213     public final static int REQUEST_DISPOSITION = 0;
214     public final static int REQUEST_URL = 1;
215     public final static int REQUEST_BLOCKLIST = 2;
216     public final static int REQUEST_SUBLIST = 3;
217     public final static int REQUEST_BLOCKLIST_ENTRIES = 4;
218     public final static int REQUEST_BLOCKLIST_ORIGINAL_ENTRY = 5;
219
220     public final static int REQUEST_DEFAULT = 0;
221     public final static int REQUEST_ALLOWED = 1;
222     public final static int REQUEST_THIRD_PARTY = 2;
223     public final static int REQUEST_BLOCKED = 3;
224
225     public final static int MAIN_WHITELIST = 1;
226     public final static int FINAL_WHITELIST = 2;
227     public final static int DOMAIN_WHITELIST = 3;
228     public final static int DOMAIN_INITIAL_WHITELIST = 4;
229     public final static int DOMAIN_FINAL_WHITELIST = 5;
230     public final static int THIRD_PARTY_WHITELIST = 6;
231     public final static int THIRD_PARTY_DOMAIN_WHITELIST = 7;
232     public final static int THIRD_PARTY_DOMAIN_INITIAL_WHITELIST = 8;
233
234     public final static int MAIN_BLACKLIST = 9;
235     public final static int INITIAL_BLACKLIST = 10;
236     public final static int FINAL_BLACKLIST = 11;
237     public final static int DOMAIN_BLACKLIST = 12;
238     public final static int DOMAIN_INITIAL_BLACKLIST = 13;
239     public final static int DOMAIN_FINAL_BLACKLIST = 14;
240     public final static int DOMAIN_REGULAR_EXPRESSION_BLACKLIST = 15;
241     public final static int THIRD_PARTY_BLACKLIST = 16;
242     public final static int THIRD_PARTY_INITIAL_BLACKLIST = 17;
243     public final static int THIRD_PARTY_DOMAIN_BLACKLIST = 18;
244     public final static int THIRD_PARTY_DOMAIN_INITIAL_BLACKLIST = 19;
245     public final static int THIRD_PARTY_REGULAR_EXPRESSION_BLACKLIST = 20;
246     public final static int THIRD_PARTY_DOMAIN_REGULAR_EXPRESSION_BLACKLIST = 21;
247     public final static int REGULAR_EXPRESSION_BLACKLIST = 22;
248
249     // `blockAllThirdPartyRequests` is public static so it can be accessed from `RequestsActivity`.
250     // It is also used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`
251     public static boolean blockAllThirdPartyRequests;
252
253     // `currentBookmarksFolder` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onCreate()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`,
254     // `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
255     public static String currentBookmarksFolder;
256
257     // `domainSettingsDatabaseId` is public static so it can be accessed from `PinnedSslCertificateMismatchDialog`.  It is also used in `onCreate()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
258     public static int domainSettingsDatabaseId;
259
260     // The pinned domain SSL Certificate variables are public static so they can be accessed from `PinnedSslCertificateMismatchDialog`.  They are also used in `onCreate()` and `applyDomainSettings()`.
261     public static String pinnedDomainSslIssuedToCNameString;
262     public static String pinnedDomainSslIssuedToONameString;
263     public static String pinnedDomainSslIssuedToUNameString;
264     public static String pinnedDomainSslIssuedByCNameString;
265     public static String pinnedDomainSslIssuedByONameString;
266     public static String pinnedDomainSslIssuedByUNameString;
267     public static Date pinnedDomainSslStartDate;
268     public static Date pinnedDomainSslEndDate;
269
270     // The user agent constants are public static so they can be accessed from `SettingsFragment`, `DomainsActivity`, and `DomainSettingsFragment`.
271     public final static int UNRECOGNIZED_USER_AGENT = -1;
272     public final static int SETTINGS_WEBVIEW_DEFAULT_USER_AGENT = 1;
273     public final static int SETTINGS_CUSTOM_USER_AGENT = 12;
274     public final static int DOMAINS_SYSTEM_DEFAULT_USER_AGENT = 0;
275     public final static int DOMAINS_WEBVIEW_DEFAULT_USER_AGENT = 2;
276     public final static int DOMAINS_CUSTOM_USER_AGENT = 13;
277
278
279     // `appBar` is used in `onCreate()`, `onOptionsItemSelected()`, `closeFindOnPage()`, and `applyAppSettings()`.
280     private ActionBar appBar;
281
282     // `navigatingHistory` is used in `onCreate()`, `onNavigationItemSelected()`, `onSslMismatchBack()`, and `applyDomainSettings()`.
283     private boolean navigatingHistory;
284
285     // `favoriteIconDefaultBitmap` is used in `onCreate()` and `applyDomainSettings`.
286     private Bitmap favoriteIconDefaultBitmap;
287
288     // `drawerLayout` is used in `onCreate()`, `onNewIntent()`, `onBackPressed()`, and `onRestart()`.
289     private DrawerLayout drawerLayout;
290
291     // `rootCoordinatorLayout` is used in `onCreate()` and `applyAppSettings()`.
292     private CoordinatorLayout rootCoordinatorLayout;
293
294     // `mainWebView` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`,
295     // `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`, `onSslMismatchBack()`, and `setDisplayWebpageImages()`.
296     private WebView mainWebView;
297
298     // `fullScreenVideoFrameLayout` is used in `onCreate()` and `onConfigurationChanged()`.
299     private FrameLayout fullScreenVideoFrameLayout;
300
301     // `swipeRefreshLayout` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `onRestart()`.
302     private SwipeRefreshLayout swipeRefreshLayout;
303
304     // `urlAppBarRelativeLayout` is used in `onCreate()` and `applyDomainSettings()`.
305     private RelativeLayout urlAppBarRelativeLayout;
306
307     // `favoriteIconImageView` is used in `onCreate()` and `applyDomainSettings()`
308     private ImageView favoriteIconImageView;
309
310     // `cookieManager` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`, `loadUrlFromTextBox()`, `onDownloadImage()`, `onDownloadFile()`, and `onRestart()`.
311     private CookieManager cookieManager;
312
313     // `customHeader` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateContextMenu()`, and `loadUrl()`.
314     private final Map<String, String> customHeaders = new HashMap<>();
315
316     // `javaScriptEnabled` is also used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `applyDomainSettings()`, and `updatePrivacyIcons()`.
317     private boolean javaScriptEnabled;
318
319     // `firstPartyCookiesEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onDownloadImage()`, `onDownloadFile()`, and `applyDomainSettings()`.
320     private boolean firstPartyCookiesEnabled;
321
322     // `thirdPartyCookiesEnabled` used in `onCreate()`, `onPrepareOptionsMenu()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
323     private boolean thirdPartyCookiesEnabled;
324
325     // `domStorageEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
326     private boolean domStorageEnabled;
327
328     // `saveFormDataEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.  It can be removed once the minimum API >= 26.
329     private boolean saveFormDataEnabled;
330
331     // `nightMode` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and  `applyDomainSettings()`.
332     private boolean nightMode;
333
334     // `displayWebpageImagesBoolean` is used in `applyAppSettings()` and `applyDomainSettings()`.
335     private boolean displayWebpageImagesBoolean;
336
337     // 'homepage' is used in `onCreate()`, `onNavigationItemSelected()`, and `applyAppSettings()`.
338     private String homepage;
339
340     // `searchURL` is used in `loadURLFromTextBox()` and `applyAppSettings()`.
341     private String searchURL;
342
343     // `mainMenu` is used in `onCreateOptionsMenu()` and `updatePrivacyIcons()`.
344     private Menu mainMenu;
345
346     // `refreshMenuItem` is used in `onCreate()` and `onCreateOptionsMenu()`.
347     private MenuItem refreshMenuItem;
348
349     // The blocklist menu items are used in `onCreate()`, `onCreateOptionsMenu()`, and `onPrepareOptionsMenu()`.
350     private MenuItem blocklistsMenuItem;
351     private MenuItem easyListMenuItem;
352     private MenuItem easyPrivacyMenuItem;
353     private MenuItem fanboysAnnoyanceListMenuItem;
354     private MenuItem fanboysSocialBlockingListMenuItem;
355     private MenuItem ultraPrivacyMenuItem;
356     private MenuItem blockAllThirdPartyRequestsMenuItem;
357
358     // The blocklist variables are used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
359     private boolean easyListEnabled;
360     private boolean easyPrivacyEnabled;
361     private boolean fanboysAnnoyanceListEnabled;
362     private boolean fanboysSocialBlockingListEnabled;
363     private boolean ultraPrivacyEnabled;
364
365     // `webViewDefaultUserAgent` is used in `onCreate()` and `onPrepareOptionsMenu()`.
366     private String webViewDefaultUserAgent;
367
368     // `defaultCustomUserAgentString` is used in `onPrepareOptionsMenu()` and `applyDomainSettings()`.
369     private String defaultCustomUserAgentString;
370
371     // `privacyBrowserRuntime` is used in `onCreate()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
372     private Runtime privacyBrowserRuntime;
373
374     // `proxyThroughOrbot` is used in `onRestart()` and `applyAppSettings()`.
375     private boolean proxyThroughOrbot;
376
377     // `incognitoModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
378     private boolean incognitoModeEnabled;
379
380     // `fullScreenBrowsingModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
381     private boolean fullScreenBrowsingModeEnabled;
382
383     // `inFullScreenBrowsingMode` is used in `onCreate()`, `onConfigurationChanged()`, and `applyAppSettings()`.
384     private boolean inFullScreenBrowsingMode;
385
386     // `hideSystemBarsOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
387     private boolean hideSystemBarsOnFullscreen;
388
389     // `translucentNavigationBarOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
390     private boolean translucentNavigationBarOnFullscreen;
391
392     // `reapplyDomainSettingsOnRestart` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, and `onAddDomain()`, .
393     private boolean reapplyDomainSettingsOnRestart;
394
395     // `reapplyAppSettingsOnRestart` is used in `onNavigationItemSelected()` and `onRestart()`.
396     private boolean reapplyAppSettingsOnRestart;
397
398     // `displayingFullScreenVideo` is used in `onCreate()` and `onResume()`.
399     private boolean displayingFullScreenVideo;
400
401     // `currentDomainName` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onAddDomain()`, and `applyDomainSettings()`.
402     private String currentDomainName;
403
404     // `ignorePinnedSslCertificateForDomain` is used in `onCreate()`, `onSslMismatchProceed()`, and `applyDomainSettings()`.
405     private boolean ignorePinnedSslCertificate;
406
407     // `orbotStatusBroadcastReceiver` is used in `onCreate()` and `onDestroy()`.
408     private BroadcastReceiver orbotStatusBroadcastReceiver;
409
410     // `waitingForOrbot` is used in `onCreate()`, `onResume()`, and `applyAppSettings()`.
411     private boolean waitingForOrbot;
412
413     // `domainSettingsApplied` is used in `prepareOptionsMenu()`, `applyDomainSettings()`, and `setDisplayWebpageImages()`.
414     private boolean domainSettingsApplied;
415
416     // `domainSettingsJavaScriptEnabled` is used in `onOptionsItemSelected()` and `applyDomainSettings()`.
417     private Boolean domainSettingsJavaScriptEnabled;
418
419     // `displayWebpageImagesInt` is used in `applyDomainSettings()` and `setDisplayWebpageImages()`.
420     private int displayWebpageImagesInt;
421
422     // `onTheFlyDisplayImagesSet` is used in `applyDomainSettings()` and `setDisplayWebpageImages()`.
423     private boolean onTheFlyDisplayImagesSet;
424
425     // `waitingForOrbotData` is used in `onCreate()` and `applyAppSettings()`.
426     private String waitingForOrbotHTMLString;
427
428     // `privateDataDirectoryString` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`.
429     private String privateDataDirectoryString;
430
431     // `findOnPageLinearLayout` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
432     private LinearLayout findOnPageLinearLayout;
433
434     // `findOnPageEditText` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
435     private EditText findOnPageEditText;
436
437     // `displayAdditionalAppBarIcons` is used in `onCreate()` and `onCreateOptionsMenu()`.
438     private boolean displayAdditionalAppBarIcons;
439
440     // `drawerToggle` is used in `onCreate()`, `onPostCreate()`, `onConfigurationChanged()`, `onNewIntent()`, and `onNavigationItemSelected()`.
441     private ActionBarDrawerToggle drawerToggle;
442
443     // `supportAppBar` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
444     private Toolbar supportAppBar;
445
446     // `urlTextBox` is used in `onCreate()`, `onOptionsItemSelected()`, `loadUrlFromTextBox()`, `loadUrl()`, and `highlightUrlText()`.
447     private EditText urlTextBox;
448
449     // The color spans are used in `onCreate()` and `highlightUrlText()`.
450     private ForegroundColorSpan redColorSpan;
451     private ForegroundColorSpan initialGrayColorSpan;
452     private ForegroundColorSpan finalGrayColorSpan;
453
454     // `sslErrorHandler` is used in `onCreate()`, `onSslErrorCancel()`, and `onSslErrorProceed`.
455     private SslErrorHandler sslErrorHandler;
456
457     // `httpAuthHandler` is used in `onCreate()`, `onHttpAuthenticationCancel()`, and `onHttpAuthenticationProceed()`.
458     private static HttpAuthHandler httpAuthHandler;
459
460     // `inputMethodManager` is used in `onOptionsItemSelected()`, `loadUrlFromTextBox()`, and `closeFindOnPage()`.
461     private InputMethodManager inputMethodManager;
462
463     // `mainWebViewRelativeLayout` is used in `onCreate()` and `onNavigationItemSelected()`.
464     private RelativeLayout mainWebViewRelativeLayout;
465
466     // `urlIsLoading` is used in `onCreate()`, `onCreateOptionsMenu()`, `loadUrl()`, and `applyDomainSettings()`.
467     private boolean urlIsLoading;
468
469     // `pinnedDomainSslCertificate` is used in `onCreate()` and `applyDomainSettings()`.
470     private boolean pinnedDomainSslCertificate;
471
472     // `bookmarksDatabaseHelper` is used in `onCreate()`, `onDestroy`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`,
473     // and `loadBookmarksFolder()`.
474     private BookmarksDatabaseHelper bookmarksDatabaseHelper;
475
476     // `bookmarksListView` is used in `onCreate()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, and `loadBookmarksFolder()`.
477     private ListView bookmarksListView;
478
479     // `bookmarksTitleTextView` is used in `onCreate()` and `loadBookmarksFolder()`.
480     private TextView bookmarksTitleTextView;
481
482     // `bookmarksCursor` is used in `onDestroy()`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
483     private Cursor bookmarksCursor;
484
485     // `bookmarksCursorAdapter` is used in `onCreateBookmark()`, `onCreateBookmarkFolder()` `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
486     private CursorAdapter bookmarksCursorAdapter;
487
488     // `oldFolderNameString` is used in `onCreate()` and `onSaveEditBookmarkFolder()`.
489     private String oldFolderNameString;
490
491     // `fileChooserCallback` is used in `onCreate()` and `onActivityResult()`.
492     private ValueCallback<Uri[]> fileChooserCallback;
493
494     // The download strings are used in `onCreate()` and `onRequestPermissionResult()`.
495     private String downloadUrl;
496     private String downloadContentDisposition;
497     private long downloadContentLength;
498
499     // `downloadImageUrl` is used in `onCreateContextMenu()` and `onRequestPermissionResult()`.
500     private String downloadImageUrl;
501
502     // The user agent variables are used in `onCreate()` and `applyDomainSettings()`.
503     private ArrayAdapter<CharSequence> userAgentNamesArray;
504     private String[] userAgentDataArray;
505
506     // The request codes are used in `onCreate()`, `onCreateContextMenu()`, `onCloseDownloadLocationPermissionDialog()`, and `onRequestPermissionResult()`.
507     private final int DOWNLOAD_FILE_REQUEST_CODE = 1;
508     private final int DOWNLOAD_IMAGE_REQUEST_CODE = 2;
509
510     @Override
511     // 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.
512     // Also, remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
513     @SuppressLint({"SetJavaScriptEnabled", "ClickableViewAccessibility"})
514     // Remove Android Studio's warning about deprecations.  We have to use the deprecated `getColor()` until API >= 23.
515     @SuppressWarnings("deprecation")
516     protected void onCreate(Bundle savedInstanceState) {
517         // Get a handle for the shared preferences.
518         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
519
520         // Get the theme and screenshot preferences.
521         darkTheme = sharedPreferences.getBoolean("dark_theme", false);
522         allowScreenshots = sharedPreferences.getBoolean("allow_screenshots", false);
523
524         // Disable screenshots if not allowed.
525         if (!allowScreenshots) {
526             getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
527         }
528
529         // Set the activity theme.
530         if (darkTheme) {
531             setTheme(R.style.PrivacyBrowserDark);
532         } else {
533             setTheme(R.style.PrivacyBrowserLight);
534         }
535
536         // Run the default commands.
537         super.onCreate(savedInstanceState);
538
539         // Set the content view.
540         setContentView(R.layout.main_drawerlayout);
541
542         // Get a handle for `inputMethodManager`.
543         inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
544
545         // `SupportActionBar` from `android.support.v7.app.ActionBar` must be used until the minimum API is >= 21.
546         supportAppBar = findViewById(R.id.app_bar);
547         setSupportActionBar(supportAppBar);
548         appBar = getSupportActionBar();
549
550         // This is needed to get rid of the Android Studio warning that `appBar` might be null.
551         assert appBar != null;
552
553         // Add the custom `url_app_bar` layout, which shows the favorite icon and the URL text bar.
554         appBar.setCustomView(R.layout.url_app_bar);
555         appBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
556
557         // Initialize the foreground color spans for highlighting the URLs.  We have to use the deprecated `getColor()` until API >= 23.
558         redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_a700));
559         initialGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
560         finalGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
561
562         // Get a handle for `urlTextBox`.
563         urlTextBox = findViewById(R.id.url_edittext);
564
565         // Remove the formatting from `urlTextBar` when the user is editing the text.
566         urlTextBox.setOnFocusChangeListener((View v, boolean hasFocus) -> {
567             if (hasFocus) {  // The user is editing the URL text box.
568                 // Remove the highlighting.
569                 urlTextBox.getText().removeSpan(redColorSpan);
570                 urlTextBox.getText().removeSpan(initialGrayColorSpan);
571                 urlTextBox.getText().removeSpan(finalGrayColorSpan);
572             } else {  // The user has stopped editing the URL text box.
573                 // Move to the beginning of the string.
574                 urlTextBox.setSelection(0);
575
576                 // Reapply the highlighting.
577                 highlightUrlText();
578             }
579         });
580
581         // Set the go button on the keyboard to load the URL in `urlTextBox`.
582         urlTextBox.setOnKeyListener((View v, int keyCode, KeyEvent event) -> {
583             // If the event is a key-down event on the `enter` button, load the URL.
584             if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {
585                 // Load the URL into the mainWebView and consume the event.
586                 try {
587                     loadUrlFromTextBox();
588                 } catch (UnsupportedEncodingException e) {
589                     e.printStackTrace();
590                 }
591                 // If the enter key was pressed, consume the event.
592                 return true;
593             } else {
594                 // If any other key was pressed, do not consume the event.
595                 return false;
596             }
597         });
598
599         // Set `waitingForOrbotHTMLString`.
600         waitingForOrbotHTMLString = "<html><body><br/><center><h1>" + getString(R.string.waiting_for_orbot) + "</h1></center></body></html>";
601
602         // Initialize `currentDomainName`, `orbotStatus`, and `waitingForOrbot`.
603         currentDomainName = "";
604         orbotStatus = "unknown";
605         waitingForOrbot = false;
606
607         // Create an Orbot status `BroadcastReceiver`.
608         orbotStatusBroadcastReceiver = new BroadcastReceiver() {
609             @Override
610             public void onReceive(Context context, Intent intent) {
611                 // Store the content of the status message in `orbotStatus`.
612                 orbotStatus = intent.getStringExtra("org.torproject.android.intent.extra.STATUS");
613
614                 // If Privacy Browser is waiting on Orbot, load the website now that Orbot is connected.
615                 if (orbotStatus.equals("ON") && waitingForOrbot) {
616                     // Reset `waitingForOrbot`.
617                     waitingForOrbot = false;
618
619                     // Load `formattedUrlString
620                     loadUrl(formattedUrlString);
621                 }
622             }
623         };
624
625         // Register `orbotStatusBroadcastReceiver` on `this` context.
626         this.registerReceiver(orbotStatusBroadcastReceiver, new IntentFilter("org.torproject.android.intent.action.STATUS"));
627
628         // Get handles for views that need to be accessed.
629         drawerLayout = findViewById(R.id.drawerlayout);
630         rootCoordinatorLayout = findViewById(R.id.root_coordinatorlayout);
631         bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
632         bookmarksTitleTextView = findViewById(R.id.bookmarks_title_textview);
633         FloatingActionButton launchBookmarksActivityFab = findViewById(R.id.launch_bookmarks_activity_fab);
634         FloatingActionButton createBookmarkFolderFab = findViewById(R.id.create_bookmark_folder_fab);
635         FloatingActionButton createBookmarkFab = findViewById(R.id.create_bookmark_fab);
636         mainWebViewRelativeLayout = findViewById(R.id.main_webview_relativelayout);
637         mainWebView = findViewById(R.id.main_webview);
638         findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
639         findOnPageEditText = findViewById(R.id.find_on_page_edittext);
640         fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
641         urlAppBarRelativeLayout = findViewById(R.id.url_app_bar_relativelayout);
642         favoriteIconImageView = findViewById(R.id.favorite_icon);
643
644         // 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.
645         if (darkTheme) {
646             launchBookmarksActivityFab.setImageDrawable(getResources().getDrawable(R.drawable.bookmarks_dark));
647             createBookmarkFolderFab.setImageDrawable(getResources().getDrawable(R.drawable.create_folder_dark));
648             createBookmarkFab.setImageDrawable(getResources().getDrawable(R.drawable.create_bookmark_dark));
649             bookmarksListView.setBackgroundColor(getResources().getColor(R.color.gray_850));
650         } else {
651             launchBookmarksActivityFab.setImageDrawable(getResources().getDrawable(R.drawable.bookmarks_light));
652             createBookmarkFolderFab.setImageDrawable(getResources().getDrawable(R.drawable.create_folder_light));
653             createBookmarkFab.setImageDrawable(getResources().getDrawable(R.drawable.create_bookmark_light));
654             bookmarksListView.setBackgroundColor(getResources().getColor(R.color.white));
655         }
656
657         // Set the launch bookmarks activity FAB to launch the bookmarks activity.
658         launchBookmarksActivityFab.setOnClickListener(v -> {
659             // Create an intent to launch the bookmarks activity.
660             Intent bookmarksIntent = new Intent(getApplicationContext(), BookmarksActivity.class);
661
662             // Include the current folder with the `Intent`.
663             bookmarksIntent.putExtra("Current Folder", currentBookmarksFolder);
664
665             // Make it so.
666             startActivity(bookmarksIntent);
667         });
668
669         // Set the create new bookmark folder FAB to display an alert dialog.
670         createBookmarkFolderFab.setOnClickListener(v -> {
671             // Show the `CreateBookmarkFolderDialog` `AlertDialog` and name the instance `@string/create_folder`.
672             AppCompatDialogFragment createBookmarkFolderDialog = new CreateBookmarkFolderDialog();
673             createBookmarkFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_folder));
674         });
675
676         // Set the create new bookmark FAB to display an alert dialog.
677         createBookmarkFab.setOnClickListener(view -> {
678             // Show the `CreateBookmarkDialog` `AlertDialog` and name the instance `@string/create_bookmark`.
679             AppCompatDialogFragment createBookmarkDialog = new CreateBookmarkDialog();
680             createBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_bookmark));
681         });
682
683         // Create a double-tap listener to toggle full-screen mode.
684         final GestureDetector gestureDetector = new GestureDetector(this, new GestureDetector.SimpleOnGestureListener() {
685             // Override `onDoubleTap()`.  All other events are handled using the default settings.
686             @Override
687             public boolean onDoubleTap(MotionEvent event) {
688                 if (fullScreenBrowsingModeEnabled) {  // Only process the double-tap if full screen browsing mode is enabled.
689                     // Toggle `inFullScreenBrowsingMode`.
690                     inFullScreenBrowsingMode = !inFullScreenBrowsingMode;
691
692                     if (inFullScreenBrowsingMode) {  // Switch to full screen mode.
693                         // Hide the `appBar`.
694                         appBar.hide();
695
696                         // Hide the banner ad in the free flavor.
697                         if (BuildConfig.FLAVOR.contentEquals("free")) {
698                             // The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
699                             AdHelper.hideAd(findViewById(R.id.adview));
700                         }
701
702                         // Modify the system bars.
703                         if (hideSystemBarsOnFullscreen) {  // Hide everything.
704                             // Remove the translucent overlays.
705                             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
706
707                             // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
708                             drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
709
710                             /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
711                              * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
712                              * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
713                              */
714                             rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
715
716                             // Set `rootCoordinatorLayout` to fill the whole screen.
717                             rootCoordinatorLayout.setFitsSystemWindows(false);
718                         } else {  // Hide everything except the status and navigation bars.
719                             // Set `rootCoordinatorLayout` to fit under the status and navigation bars.
720                             rootCoordinatorLayout.setFitsSystemWindows(false);
721
722                             // 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.
723                             if (translucentNavigationBarOnFullscreen) {
724                                 // Set the navigation bar to be translucent.
725                                 getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
726                             }
727                         }
728                     } else {  // Switch to normal viewing mode.
729                         // Show the `appBar`.
730                         appBar.show();
731
732                         // Show the `BannerAd` in the free flavor.
733                         if (BuildConfig.FLAVOR.contentEquals("free")) {
734                             // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
735                             AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
736                         }
737
738                         // Remove the translucent navigation bar flag if it is set.
739                         getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
740
741                         // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
742                         getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
743
744                         // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
745                         rootCoordinatorLayout.setSystemUiVisibility(0);
746
747                         // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
748                         rootCoordinatorLayout.setFitsSystemWindows(true);
749                     }
750
751                     // Consume the double-tap.
752                     return true;
753                 } else { // Do not consume the double-tap because full screen browsing mode is disabled.
754                     return false;
755                 }
756             }
757         });
758
759         // Pass all touch events on `mainWebView` through `gestureDetector` to check for double-taps.
760         mainWebView.setOnTouchListener((View v, MotionEvent event) -> {
761             // Call `performClick()` on the view, which is required for accessibility.
762             v.performClick();
763
764             // Send the `event` to `gestureDetector`.
765             return gestureDetector.onTouchEvent(event);
766         });
767
768         // Update `findOnPageCountTextView`.
769         mainWebView.setFindListener(new WebView.FindListener() {
770             // Get a handle for `findOnPageCountTextView`.
771             final TextView findOnPageCountTextView = (TextView) findViewById(R.id.find_on_page_count_textview);
772
773             @Override
774             public void onFindResultReceived(int activeMatchOrdinal, int numberOfMatches, boolean isDoneCounting) {
775                 if ((isDoneCounting) && (numberOfMatches == 0)) {  // There are no matches.
776                     // Set `findOnPageCountTextView` to `0/0`.
777                     findOnPageCountTextView.setText(R.string.zero_of_zero);
778                 } else if (isDoneCounting) {  // There are matches.
779                     // `activeMatchOrdinal` is zero-based.
780                     int activeMatch = activeMatchOrdinal + 1;
781
782                     // Build the match string.
783                     String matchString = activeMatch + "/" + numberOfMatches;
784
785                     // Set `findOnPageCountTextView`.
786                     findOnPageCountTextView.setText(matchString);
787                 }
788             }
789         });
790
791         // Search for the string on the page whenever a character changes in the `findOnPageEditText`.
792         findOnPageEditText.addTextChangedListener(new TextWatcher() {
793             @Override
794             public void beforeTextChanged(CharSequence s, int start, int count, int after) {
795                 // Do nothing.
796             }
797
798             @Override
799             public void onTextChanged(CharSequence s, int start, int before, int count) {
800                 // Do nothing.
801             }
802
803             @Override
804             public void afterTextChanged(Editable s) {
805                 // Search for the text in `mainWebView`.
806                 mainWebView.findAllAsync(findOnPageEditText.getText().toString());
807             }
808         });
809
810         // Set the `check mark` button for the `findOnPageEditText` keyboard to close the soft keyboard.
811         findOnPageEditText.setOnKeyListener((v, keyCode, event) -> {
812             if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {  // The `enter` key was pressed.
813                 // Hide the soft keyboard.  `0` indicates no additional flags.
814                 inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
815
816                 // Consume the event.
817                 return true;
818             } else {  // A different key was pressed.
819                 // Do not consume the event.
820                 return false;
821             }
822         });
823
824         // Implement swipe to refresh
825         swipeRefreshLayout = findViewById(R.id.swipe_refreshlayout);
826         swipeRefreshLayout.setColorSchemeResources(R.color.blue_700);
827         swipeRefreshLayout.setOnRefreshListener(() -> mainWebView.reload());
828
829         // `DrawerTitle` identifies the `DrawerLayouts` in accessibility mode.
830         drawerLayout.setDrawerTitle(GravityCompat.START, getString(R.string.navigation_drawer));
831         drawerLayout.setDrawerTitle(GravityCompat.END, getString(R.string.bookmarks));
832
833         // Listen for touches on the navigation menu.
834         final NavigationView navigationView = findViewById(R.id.navigationview);
835         navigationView.setNavigationItemSelectedListener(this);
836
837         // 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.
838         final Menu navigationMenu = navigationView.getMenu();
839         final MenuItem navigationBackMenuItem = navigationMenu.getItem(1);
840         final MenuItem navigationForwardMenuItem = navigationMenu.getItem(2);
841         final MenuItem navigationHistoryMenuItem = navigationMenu.getItem(3);
842         final MenuItem navigationRequestsMenuItem = navigationMenu.getItem(4);
843
844         // Initialize the bookmarks database helper.  `this` specifies the context.  The two `nulls` do not specify the database name or a `CursorFactory`.
845         // The `0` specifies a database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
846         bookmarksDatabaseHelper = new BookmarksDatabaseHelper(this, null, null, 0);
847
848         // Initialize `currentBookmarksFolder`.  `""` is the home folder in the database.
849         currentBookmarksFolder = "";
850
851         // Load the home folder, which is `""` in the database.
852         loadBookmarksFolder();
853
854         bookmarksListView.setOnItemClickListener((parent, view, position, id) -> {
855             // Convert the id from long to int to match the format of the bookmarks database.
856             int databaseID = (int) id;
857
858             // Get the bookmark cursor for this ID and move it to the first row.
859             Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmarkCursor(databaseID);
860             bookmarkCursor.moveToFirst();
861
862             // Act upon the bookmark according to the type.
863             if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {  // The selected bookmark is a folder.
864                 // Store the new folder name in `currentBookmarksFolder`.
865                 currentBookmarksFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
866
867                 // Load the new folder.
868                 loadBookmarksFolder();
869             } else {  // The selected bookmark is not a folder.
870                 // Load the bookmark URL.
871                 loadUrl(bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL)));
872
873                 // Close the bookmarks drawer.
874                 drawerLayout.closeDrawer(GravityCompat.END);
875             }
876
877             // Close the `Cursor`.
878             bookmarkCursor.close();
879         });
880
881         bookmarksListView.setOnItemLongClickListener((parent, view, position, id) -> {
882             // Convert the database ID from `long` to `int`.
883             int databaseId = (int) id;
884
885             // Find out if the selected bookmark is a folder.
886             boolean isFolder = bookmarksDatabaseHelper.isFolder(databaseId);
887
888             if (isFolder) {
889                 // Save the current folder name, which is used in `onSaveEditBookmarkFolder()`.
890                 oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
891
892                 // Show the edit bookmark folder `AlertDialog` and name the instance `@string/edit_folder`.
893                 AppCompatDialogFragment editFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId);
894                 editFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_folder));
895             } else {
896                 // Show the edit bookmark `AlertDialog` and name the instance `@string/edit_bookmark`.
897                 AppCompatDialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId);
898                 editBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_bookmark));
899             }
900
901             // Consume the event.
902             return true;
903         });
904
905         // The drawer listener is used to update the navigation menu.
906         drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
907             @Override
908             public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
909             }
910
911             @Override
912             public void onDrawerOpened(@NonNull View drawerView) {
913             }
914
915             @Override
916             public void onDrawerClosed(@NonNull View drawerView) {
917             }
918
919             @Override
920             public void onDrawerStateChanged(int newState) {
921                 if ((newState == DrawerLayout.STATE_SETTLING) || (newState == DrawerLayout.STATE_DRAGGING)) {  // A drawer is opening or closing.
922                     // Update the back, forward, history, and requests menu items.
923                     navigationBackMenuItem.setEnabled(mainWebView.canGoBack());
924                     navigationForwardMenuItem.setEnabled(mainWebView.canGoForward());
925                     navigationHistoryMenuItem.setEnabled((mainWebView.canGoBack() || mainWebView.canGoForward()));
926                     navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
927
928                     // Hide the keyboard (if displayed).
929                     inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
930
931                     // Clear the focus from from the URL text box.
932                     urlTextBox.clearFocus();
933                 }
934             }
935         });
936
937         // drawerToggle creates the hamburger icon at the start of the AppBar.
938         drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, supportAppBar, R.string.open_navigation_drawer, R.string.close_navigation_drawer);
939
940         // Get a handle for the progress bar.
941         final ProgressBar progressBar = findViewById(R.id.progress_bar);
942
943         mainWebView.setWebChromeClient(new WebChromeClient() {
944             // Update the progress bar when a page is loading.
945             @Override
946             public void onProgressChanged(WebView view, int progress) {
947                 // Inject the night mode CSS if night mode is enabled.
948                 if (nightMode) {
949                     // `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
950                     // used by WordPress.  `text-decoration: none` removes all text underlines.  `text-shadow: none` removes text shadows, which usually have a hard coded color.
951                     // `border: none` removes all borders, which can also be used to underline text.
952                     // `a {color: #1565C0}` sets links to be a dark blue.  `!important` takes precedent over any existing sub-settings.
953                     mainWebView.evaluateJavascript("(function() {var parent = document.getElementsByTagName('head').item(0); var style = document.createElement('style'); style.type = 'text/css'; " +
954                             "style.innerHTML = '* {background-color: #212121 !important; color: #BDBDBD !important; box-shadow: none !important; text-decoration: none !important;" +
955                             "text-shadow: none !important; border: none !important;} a {color: #1565C0 !important;}'; parent.appendChild(style)})()", value -> {
956                                 // Initialize a handler to display `mainWebView`.
957                                 Handler displayWebViewHandler = new Handler();
958
959                                 // Setup a runnable to display `mainWebView` after a delay to allow the CSS to be applied.
960                                 Runnable displayWebViewRunnable = () -> {
961                                     // Only display `mainWebView` if the progress bar is one.  This prevents the display of the `WebView` while it is still loading.
962                                     if (progressBar.getVisibility() == View.GONE) {
963                                         mainWebView.setVisibility(View.VISIBLE);
964                                     }
965                                 };
966
967                                 // Displaying of `mainWebView` after 500 milliseconds.
968                                 displayWebViewHandler.postDelayed(displayWebViewRunnable, 500);
969                             });
970                 }
971
972                 // Update the progress bar.
973                 progressBar.setProgress(progress);
974
975                 // Set the visibility of the progress bar.
976                 if (progress < 100) {
977                     // Show the progress bar.
978                     progressBar.setVisibility(View.VISIBLE);
979                 } else {
980                     // Hide the progress bar.
981                     progressBar.setVisibility(View.GONE);
982
983                     // Display `mainWebView` if night mode is disabled.
984                     // 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
985                     // currently enabled.
986                     if (!nightMode) {
987                         mainWebView.setVisibility(View.VISIBLE);
988                     }
989
990                     //Stop the swipe to refresh indicator if it is running
991                     swipeRefreshLayout.setRefreshing(false);
992                 }
993             }
994
995             // Set the favorite icon when it changes.
996             @Override
997             public void onReceivedIcon(WebView view, Bitmap icon) {
998                 // Only update the favorite icon if the website has finished loading.
999                 if (progressBar.getVisibility() == View.GONE) {
1000                     // Save a copy of the favorite icon.
1001                     favoriteIconBitmap = icon;
1002
1003                     // Place the favorite icon in the appBar.
1004                     favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
1005                 }
1006             }
1007
1008             // Save a copy of the title when it changes.
1009             @Override
1010             public void onReceivedTitle(WebView view, String title) {
1011                 // Save a copy of the title.
1012                 webViewTitle = title;
1013             }
1014
1015             // Enter full screen video.
1016             @Override
1017             public void onShowCustomView(View view, CustomViewCallback callback) {
1018                 // Set the full screen video flag.
1019                 displayingFullScreenVideo = true;
1020
1021                 // Pause the ad if this is the free flavor.
1022                 if (BuildConfig.FLAVOR.contentEquals("free")) {
1023                     // The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
1024                     AdHelper.pauseAd(findViewById(R.id.adview));
1025                 }
1026
1027                 // Remove the translucent overlays.
1028                 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
1029
1030                 // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
1031                 drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
1032
1033                 /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
1034                  * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
1035                  * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
1036                  */
1037                 rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
1038
1039                 // Set `rootCoordinatorLayout` to fill the entire screen.
1040                 rootCoordinatorLayout.setFitsSystemWindows(false);
1041
1042                 // Disable the sliding drawers.
1043                 drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
1044
1045                 // Add `view` to `fullScreenVideoFrameLayout` and display it on the screen.
1046                 fullScreenVideoFrameLayout.addView(view);
1047                 fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
1048             }
1049
1050             // Exit full screen video.
1051             @Override
1052             public void onHideCustomView() {
1053                 // Unset the full screen video flag.
1054                 displayingFullScreenVideo = false;
1055
1056                 // Hide `fullScreenVideoFrameLayout`.
1057                 fullScreenVideoFrameLayout.removeAllViews();
1058                 fullScreenVideoFrameLayout.setVisibility(View.GONE);
1059
1060                 // Enable the sliding drawers.
1061                 drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
1062
1063                 // Apply the appropriate full screen mode the `SYSTEM_UI` flags.
1064                 if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
1065                     if (hideSystemBarsOnFullscreen) {  // Hide everything.
1066                         // Remove the translucent navigation setting if it is currently flagged.
1067                         getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
1068
1069                         // Remove the translucent status bar overlay.
1070                         getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
1071
1072                         // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
1073                         drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
1074
1075                         /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
1076                          * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
1077                          * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
1078                          */
1079                         rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
1080                     } else {  // Hide everything except the status and navigation bars.
1081                         // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
1082                         rootCoordinatorLayout.setSystemUiVisibility(0);
1083
1084                         // Add the translucent status flag if it is unset.
1085                         getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
1086
1087                         if (translucentNavigationBarOnFullscreen) {
1088                             // Set the navigation bar to be translucent.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
1089                             getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
1090                         } else {
1091                             // Set the navigation bar to be black.
1092                             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
1093                         }
1094                     }
1095                 } else {  // Switch to normal viewing mode.
1096                     // Show the `appBar` if `findOnPageLinearLayout` is not visible.
1097                     if (findOnPageLinearLayout.getVisibility() == View.GONE) {
1098                         appBar.show();
1099                     }
1100
1101                     // Show the `BannerAd` in the free flavor.
1102                     if (BuildConfig.FLAVOR.contentEquals("free")) {
1103                         // Initialize the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
1104                         AdHelper.initializeAds(findViewById(R.id.adview), getApplicationContext(), getFragmentManager(), getString(R.string.google_app_id), getString(R.string.ad_unit_id));
1105                     }
1106
1107                     // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
1108                     rootCoordinatorLayout.setSystemUiVisibility(0);
1109
1110                     // Remove the translucent navigation bar flag if it is set.
1111                     getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
1112
1113                     // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
1114                     getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
1115
1116                     // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
1117                     rootCoordinatorLayout.setFitsSystemWindows(true);
1118                 }
1119
1120                 // Show the ad if this is the free flavor.
1121                 if (BuildConfig.FLAVOR.contentEquals("free")) {
1122                     // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
1123                     AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
1124                 }
1125             }
1126
1127             // Upload files.
1128             @Override
1129             public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
1130                 // Show the file chooser if the device is running API >= 21.
1131                 if (Build.VERSION.SDK_INT >= 21) {
1132                     // Store the file path callback.
1133                     fileChooserCallback = filePathCallback;
1134
1135                     // Create an intent to open a chooser based ont the file chooser parameters.
1136                     Intent fileChooserIntent = fileChooserParams.createIntent();
1137
1138                     // Open the file chooser.  Currently only one `startActivityForResult` exists in this activity, so the request code, used to differentiate them, is simply `0`.
1139                     startActivityForResult(fileChooserIntent, 0);
1140                 }
1141                 return true;
1142             }
1143         });
1144
1145         // Register `mainWebView` for a context menu.  This is used to see link targets and download images.
1146         registerForContextMenu(mainWebView);
1147
1148         // Allow the downloading of files.
1149         mainWebView.setDownloadListener((String url, String userAgent, String contentDisposition, String mimetype, long contentLength) -> {
1150             // Check to see if the WRITE_EXTERNAL_STORAGE permission has already been granted.
1151             if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {
1152                 // The WRITE_EXTERNAL_STORAGE permission needs to be requested.
1153
1154                 // Store the variables for future use by `onRequestPermissionsResult()`.
1155                 downloadUrl = url;
1156                 downloadContentDisposition = contentDisposition;
1157                 downloadContentLength = contentLength;
1158
1159                 // Show a dialog if the user has previously denied the permission.
1160                 if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
1161                     // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_FILE.
1162                     DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_FILE);
1163
1164                     // Show the download location permission alert dialog.  The permission will be requested when the the dialog is closed.
1165                     downloadLocationPermissionDialogFragment.show(getFragmentManager(), getString(R.string.download_location));
1166                 } else {  // Show the permission request directly.
1167                     // Request the permission.  The download dialog will be launched by `onRequestPermissionResult()`.
1168                     ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
1169                 }
1170             } else {  // The storage permission has already been granted.
1171                 // Get a handle for the download file alert dialog.
1172                 AppCompatDialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(url, contentDisposition, contentLength);
1173
1174                 // Show the download file alert dialog.
1175                 downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
1176             }
1177         });
1178
1179         // Allow pinch to zoom.
1180         mainWebView.getSettings().setBuiltInZoomControls(true);
1181
1182         // Hide zoom controls.
1183         mainWebView.getSettings().setDisplayZoomControls(false);
1184
1185         // Set `mainWebView` to use a wide viewport.  Otherwise, some web pages will be scrunched and some content will render outside the screen.
1186         mainWebView.getSettings().setUseWideViewPort(true);
1187
1188         // Set `mainWebView` to load in overview mode (zoomed out to the maximum width).
1189         mainWebView.getSettings().setLoadWithOverviewMode(true);
1190
1191         // Explicitly disable geolocation.
1192         mainWebView.getSettings().setGeolocationEnabled(false);
1193
1194         // Initialize cookieManager.
1195         cookieManager = CookieManager.getInstance();
1196
1197         // 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).
1198         customHeaders.put("X-Requested-With", "");
1199
1200         // Initialize the default preference values the first time the program is run.  `false` keeps this command from resetting any current preferences back to default.
1201         PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
1202
1203         // Get the intent that started the app.
1204         final Intent launchingIntent = getIntent();
1205
1206         // Extract the launching intent data as `launchingIntentUriData`.
1207         final Uri launchingIntentUriData = launchingIntent.getData();
1208
1209         // Convert the launching intent URI data (if it exists) to a string and store it in `formattedUrlString`.
1210         if (launchingIntentUriData != null) {
1211             formattedUrlString = launchingIntentUriData.toString();
1212         }
1213
1214         // Get a handle for the `Runtime`.
1215         privacyBrowserRuntime = Runtime.getRuntime();
1216
1217         // Store the application's private data directory.
1218         privateDataDirectoryString = getApplicationInfo().dataDir;
1219         // `dataDir` will vary, but will be something like `/data/user/0/com.stoutner.privacybrowser.standard`, which links to `/data/data/com.stoutner.privacybrowser.standard`.
1220
1221         // Initialize `inFullScreenBrowsingMode`, which is always false at this point because Privacy Browser never starts in full screen browsing mode.
1222         inFullScreenBrowsingMode = false;
1223
1224         // Initialize the privacy settings variables.
1225         javaScriptEnabled = false;
1226         firstPartyCookiesEnabled = false;
1227         thirdPartyCookiesEnabled = false;
1228         domStorageEnabled = false;
1229         saveFormDataEnabled = false;  // Form data can be removed once the minimum API >= 26.
1230         nightMode = false;
1231
1232         // Store the default user agent.
1233         webViewDefaultUserAgent = mainWebView.getSettings().getUserAgentString();
1234
1235         // Initialize the WebView title.
1236         webViewTitle = getString(R.string.no_title);
1237
1238         // Initialize the favorite icon bitmap.  `ContextCompat` must be used until API >= 21.
1239         Drawable favoriteIconDrawable = ContextCompat.getDrawable(getApplicationContext(), R.drawable.world);
1240         BitmapDrawable favoriteIconBitmapDrawable = (BitmapDrawable) favoriteIconDrawable;
1241         assert favoriteIconBitmapDrawable != null;
1242         favoriteIconDefaultBitmap = favoriteIconBitmapDrawable.getBitmap();
1243
1244         // If the favorite icon is null, load the default.
1245         if (favoriteIconBitmap == null) {
1246             favoriteIconBitmap = favoriteIconDefaultBitmap;
1247         }
1248
1249         // Initialize the user agent array adapter and string array.
1250         userAgentNamesArray = ArrayAdapter.createFromResource(this, R.array.user_agent_names, R.layout.domain_settings_spinner_item);
1251         userAgentDataArray = getResources().getStringArray(R.array.user_agent_data);
1252
1253         // Apply the app settings from the shared preferences.
1254         applyAppSettings();
1255
1256         // Instantiate the block list helper.
1257         BlockListHelper blockListHelper = new BlockListHelper();
1258
1259         // Initialize the list of resource requests.
1260         resourceRequests = new ArrayList<>();
1261
1262         // Parse the block lists.
1263         final ArrayList<List<String[]>> easyList = blockListHelper.parseBlockList(getAssets(), "blocklists/easylist.txt");
1264         final ArrayList<List<String[]>> easyPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/easyprivacy.txt");
1265         final ArrayList<List<String[]>> fanboysAnnoyanceList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-annoyance.txt");
1266         final ArrayList<List<String[]>> fanboysSocialList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-social.txt");
1267         final ArrayList<List<String[]>> ultraPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/ultraprivacy.txt");
1268
1269         // Store the list versions.
1270         easyListVersion = easyList.get(0).get(0)[0];
1271         easyPrivacyVersion = easyPrivacy.get(0).get(0)[0];
1272         fanboysAnnoyanceVersion = fanboysAnnoyanceList.get(0).get(0)[0];
1273         fanboysSocialVersion = fanboysSocialList.get(0).get(0)[0];
1274         ultraPrivacyVersion = ultraPrivacy.get(0).get(0)[0];
1275
1276         // Get a handle for the activity.  This is used to update the requests counter while the navigation menu is open.
1277         Activity activity = this;
1278
1279         mainWebView.setWebViewClient(new WebViewClient() {
1280             // `shouldOverrideUrlLoading` makes this `WebView` the default handler for URLs inside the app, so that links are not kicked out to other apps.
1281             // The deprecated `shouldOverrideUrlLoading` must be used until API >= 24.
1282             @SuppressWarnings("deprecation")
1283             @Override
1284             public boolean shouldOverrideUrlLoading(WebView view, String url) {
1285                 if (url.startsWith("http")) {  // Load the URL in Privacy Browser.
1286                     // Reset the formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
1287                     formattedUrlString = "";
1288
1289                     // Apply the domain settings for the new URL.  `applyDomainSettings` doesn't do anything if the domain has not changed.
1290                     applyDomainSettings(url, true, false);
1291
1292                     // Returning false causes the current WebView to handle the URL and prevents it from adding redirects to the history list.
1293                     return false;
1294                 } else if (url.startsWith("mailto:")) {  // Load the email address in an external email program.
1295                     // Use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
1296                     Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
1297
1298                     // Parse the url and set it as the data for the intent.
1299                     emailIntent.setData(Uri.parse(url));
1300
1301                     // Open the email program in a new task instead of as part of Privacy Browser.
1302                     emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1303
1304                     // Make it so.
1305                     startActivity(emailIntent);
1306
1307                     // Returning true indicates Privacy Browser is handling the URL by creating an intent.
1308                     return true;
1309                 } else if (url.startsWith("tel:")) {  // Load the phone number in the dialer.
1310                     // Open the dialer and load the phone number, but wait for the user to place the call.
1311                     Intent dialIntent = new Intent(Intent.ACTION_DIAL);
1312
1313                     // Add the phone number to the intent.
1314                     dialIntent.setData(Uri.parse(url));
1315
1316                     // Open the dialer in a new task instead of as part of Privacy Browser.
1317                     dialIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1318
1319                     // Make it so.
1320                     startActivity(dialIntent);
1321
1322                     // Returning true indicates Privacy Browser is handling the URL by creating an intent.
1323                     return true;
1324                 } else {  // Load a system chooser to select an app that can handle the URL.
1325                     // Open an app that can handle the URL.
1326                     Intent genericIntent = new Intent(Intent.ACTION_VIEW);
1327
1328                     // Add the URL to the intent.
1329                     genericIntent.setData(Uri.parse(url));
1330
1331                     // List all apps that can handle the URL instead of just opening the first one.
1332                     genericIntent.addCategory(Intent.CATEGORY_BROWSABLE);
1333
1334                     // Open the app in a new task instead of as part of Privacy Browser.
1335                     genericIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1336
1337                     // Start the app or display a snackbar if no app is available to handle the URL.
1338                     try {
1339                         startActivity(genericIntent);
1340                     } catch (ActivityNotFoundException exception) {
1341                         Snackbar.make(mainWebView, getString(R.string.unrecognized_url) + "  " + url, Snackbar.LENGTH_SHORT).show();
1342                     }
1343
1344                     // Returning true indicates Privacy Browser is handling the URL by creating an intent.
1345                     return true;
1346                 }
1347             }
1348
1349             // Check requests against the block lists.  The deprecated `shouldInterceptRequest()` must be used until minimum API >= 21.
1350             @SuppressWarnings("deprecation")
1351             @Override
1352             public WebResourceResponse shouldInterceptRequest(WebView view, String url){
1353                 // Create an empty web resource response to be used if the resource request is blocked.
1354                 WebResourceResponse emptyWebResourceResponse = new WebResourceResponse("text/plain", "utf8", new ByteArrayInputStream("".getBytes()));
1355
1356                 // Reset the whitelist results tracker.
1357                 whiteListResultStringArray = null;
1358
1359                 // Initialize the third party request tracker.
1360                 boolean isThirdPartyRequest = false;
1361
1362                 // Initialize the current domain string.
1363                 String currentDomain = "";
1364
1365                 // Nobody is happy when comparing null strings.
1366                 if (!(formattedUrlString == null) && !(url == null)) {
1367                     // Get the domain strings to URIs.
1368                     Uri currentDomainUri = Uri.parse(formattedUrlString);
1369                     Uri requestDomainUri = Uri.parse(url);
1370
1371                     // Get the domain host names.
1372                     String currentBaseDomain = currentDomainUri.getHost();
1373                     String requestBaseDomain = requestDomainUri.getHost();
1374
1375                     // Update the current domain variable.
1376                     currentDomain = currentBaseDomain;
1377
1378                     // Only compare the current base domain and the request base domain if neither is null.
1379                     if (!(currentBaseDomain == null) && !(requestBaseDomain == null)) {
1380                         // Determine the current base domain.
1381                         while (currentBaseDomain.indexOf(".", currentBaseDomain.indexOf(".") + 1) > 0) {  // There is at least one subdomain.
1382                             // Remove the first subdomain.
1383                             currentBaseDomain = currentBaseDomain.substring(currentBaseDomain.indexOf(".") + 1);
1384                         }
1385
1386                         // Determine the request base domain.
1387                         while (requestBaseDomain.indexOf(".", requestBaseDomain.indexOf(".") + 1) > 0) {  // There is at least one subdomain.
1388                             // Remove the first subdomain.
1389                             requestBaseDomain = requestBaseDomain.substring(requestBaseDomain.indexOf(".") + 1);
1390                         }
1391
1392                         // Update the third party request tracker.
1393                         isThirdPartyRequest = !currentBaseDomain.equals(requestBaseDomain);
1394                     }
1395                 }
1396
1397                 // Block third-party requests if enabled.
1398                 if (isThirdPartyRequest && blockAllThirdPartyRequests) {
1399                     // Increment the blocked requests counters.
1400                     blockedRequests++;
1401                     thirdPartyBlockedRequests++;
1402
1403                     // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1404                     activity.runOnUiThread(() -> {
1405                         navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1406                         blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1407                         blockAllThirdPartyRequestsMenuItem.setTitle(thirdPartyBlockedRequests + " - " + getString(R.string.block_all_third_party_requests));
1408                     });
1409
1410                     // Add the request to the log.
1411                     resourceRequests.add(new String[]{String.valueOf(REQUEST_THIRD_PARTY), url});
1412
1413                     // Return an empty web resource response.
1414                     return emptyWebResourceResponse;
1415                 }
1416
1417                 // Check UltraPrivacy if it is enabled.
1418                 if (ultraPrivacyEnabled) {
1419                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, ultraPrivacy)) {
1420                         // Increment the blocked requests counters.
1421                         blockedRequests++;
1422                         ultraPrivacyBlockedRequests++;
1423
1424                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1425                         activity.runOnUiThread(() -> {
1426                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1427                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1428                             ultraPrivacyMenuItem.setTitle(ultraPrivacyBlockedRequests + " - " + getString(R.string.ultraprivacy));
1429                         });
1430
1431                         // The resource request was blocked.  Return an empty web resource response.
1432                         return emptyWebResourceResponse;
1433                     }
1434
1435                     // If the whitelist result is not null, the request has been allowed by UltraPrivacy.
1436                     if (whiteListResultStringArray != null) {
1437                         // Add a whitelist entry to the resource requests array.
1438                         resourceRequests.add(whiteListResultStringArray);
1439
1440                         // The resource request has been allowed by UltraPrivacy.  `return null` loads the requested resource.
1441                         return null;
1442                     }
1443                 }
1444
1445                 // Check EasyList if it is enabled.
1446                 if (easyListEnabled) {
1447                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, easyList)) {
1448                         // Increment the blocked requests counters.
1449                         blockedRequests++;
1450                         easyListBlockedRequests++;
1451
1452                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1453                         activity.runOnUiThread(() -> {
1454                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1455                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1456                             easyListMenuItem.setTitle(easyListBlockedRequests + " - " + getString(R.string.easylist));
1457                         });
1458
1459                         // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
1460                         whiteListResultStringArray = null;
1461
1462                         // The resource request was blocked.  Return an empty web resource response.
1463                         return emptyWebResourceResponse;
1464                     }
1465                 }
1466
1467                 // Check EasyPrivacy if it is enabled.
1468                 if (easyPrivacyEnabled) {
1469                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, easyPrivacy)) {
1470                         // Increment the blocked requests counters.
1471                         blockedRequests++;
1472                         easyPrivacyBlockedRequests++;
1473
1474                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1475                         activity.runOnUiThread(() -> {
1476                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1477                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1478                             easyPrivacyMenuItem.setTitle(easyPrivacyBlockedRequests + " - " + getString(R.string.easyprivacy));
1479                         });
1480
1481                         // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
1482                         whiteListResultStringArray = null;
1483
1484                         // The resource request was blocked.  Return an empty web resource response.
1485                         return emptyWebResourceResponse;
1486                     }
1487                 }
1488
1489                 // Check Fanboy’s Annoyance List if it is enabled.
1490                 if (fanboysAnnoyanceListEnabled) {
1491                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, fanboysAnnoyanceList)) {
1492                         // Increment the blocked requests counters.
1493                         blockedRequests++;
1494                         fanboysAnnoyanceListBlockedRequests++;
1495
1496                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1497                         activity.runOnUiThread(() -> {
1498                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1499                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1500                             fanboysAnnoyanceListMenuItem.setTitle(fanboysAnnoyanceListBlockedRequests + " - " + getString(R.string.fanboys_annoyance_list));
1501                         });
1502
1503                         // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
1504                         whiteListResultStringArray = null;
1505
1506                         // The resource request was blocked.  Return an empty web resource response.
1507                         return emptyWebResourceResponse;
1508                     }
1509                 } else if (fanboysSocialBlockingListEnabled){  // Only check Fanboy’s Social Blocking List if Fanboy’s Annoyance List is disabled.
1510                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, fanboysSocialList)) {
1511                         // Increment the blocked requests counters.
1512                         blockedRequests++;
1513                         fanboysSocialBlockingListBlockedRequests++;
1514
1515                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1516                         activity.runOnUiThread(() -> {
1517                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1518                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1519                             fanboysSocialBlockingListMenuItem.setTitle(fanboysSocialBlockingListBlockedRequests + " - " + getString(R.string.fanboys_social_blocking_list));
1520                         });
1521
1522                         // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
1523                         whiteListResultStringArray = null;
1524
1525                         // The resource request was blocked.  Return an empty web resource response.
1526                         return emptyWebResourceResponse;
1527                     }
1528                 }
1529
1530                 // Add the request to the log because it hasn't been processed by any of the previous checks.
1531                 if (whiteListResultStringArray != null ) {  // The request was processed by a whitelist.
1532                     resourceRequests.add(whiteListResultStringArray);
1533                 } else {  // The request didn't match any blocklist entry.  Log it as a default request.
1534                     resourceRequests.add(new String[]{String.valueOf(REQUEST_DEFAULT), url});
1535                 }
1536
1537                 // The resource request has not been blocked.  `return null` loads the requested resource.
1538                 return null;
1539             }
1540
1541             // Handle HTTP authentication requests.
1542             @Override
1543             public void onReceivedHttpAuthRequest(WebView view, HttpAuthHandler handler, String host, String realm) {
1544                 // Store `handler` so it can be accessed from `onHttpAuthenticationCancel()` and `onHttpAuthenticationProceed()`.
1545                 httpAuthHandler = handler;
1546
1547                 // Display the HTTP authentication dialog.
1548                 AppCompatDialogFragment httpAuthenticationDialogFragment = HttpAuthenticationDialog.displayDialog(host, realm);
1549                 httpAuthenticationDialogFragment.show(getSupportFragmentManager(), getString(R.string.http_authentication));
1550             }
1551
1552             // Update the URL in urlTextBox when the page starts to load.
1553             @Override
1554             public void onPageStarted(WebView view, String url, Bitmap favicon) {
1555                 // Reset the list of resource requests.
1556                 resourceRequests.clear();
1557
1558                 // Initialize the counters for requests blocked by each blocklist.
1559                 blockedRequests = 0;
1560                 easyListBlockedRequests = 0;
1561                 easyPrivacyBlockedRequests = 0;
1562                 fanboysAnnoyanceListBlockedRequests = 0;
1563                 fanboysSocialBlockingListBlockedRequests = 0;
1564                 ultraPrivacyBlockedRequests = 0;
1565                 thirdPartyBlockedRequests = 0;
1566
1567                 // If night mode is enabled, hide `mainWebView` until after the night mode CSS is applied.
1568                 if (nightMode) {
1569                     mainWebView.setVisibility(View.INVISIBLE);
1570                 }
1571
1572                 // Hide the keyboard.  `0` indicates no additional flags.
1573                 inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
1574
1575                 // Check to see if Privacy Browser is waiting on Orbot.
1576                 if (!waitingForOrbot) {  // We are not waiting on Orbot, so we need to process the URL.
1577                     // 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.
1578                     formattedUrlString = url;
1579
1580                     // Display the formatted URL text.
1581                     urlTextBox.setText(formattedUrlString);
1582
1583                     // Apply text highlighting to `urlTextBox`.
1584                     highlightUrlText();
1585
1586                     // Apply any custom domain settings if the URL was loaded by navigating history.
1587                     if (navigatingHistory) {
1588                         // Reset `navigatingHistory`.
1589                         navigatingHistory = false;
1590
1591                         // Apply the domain settings.
1592                         applyDomainSettings(url, true, false);
1593                     }
1594
1595                     // 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.
1596                     urlIsLoading = true;
1597
1598                     // Replace Refresh with Stop if the menu item has been created.  (The WebView typically begins loading before the menu items are instantiated.)
1599                     if (refreshMenuItem != null) {
1600                         // Set the title.
1601                         refreshMenuItem.setTitle(R.string.stop);
1602
1603                         // If the icon is displayed in the AppBar, set it according to the theme.
1604                         if (displayAdditionalAppBarIcons) {
1605                             if (darkTheme) {
1606                                 refreshMenuItem.setIcon(R.drawable.close_dark);
1607                             } else {
1608                                 refreshMenuItem.setIcon(R.drawable.close_light);
1609                             }
1610                         }
1611                     }
1612                 }
1613             }
1614
1615             // It is necessary to update `formattedUrlString` and `urlTextBox` after the page finishes loading because the final URL can change during load.
1616             @Override
1617             public void onPageFinished(WebView view, String url) {
1618                 // Reset the wide view port if it has been turned off by the waiting for Orbot message.
1619                 if (!waitingForOrbot) {
1620                     mainWebView.getSettings().setUseWideViewPort(true);
1621                 }
1622
1623                 // Flush any cookies to persistent storage.  `CookieManager` has become very lazy about flushing cookies in recent versions.
1624                 if (firstPartyCookiesEnabled && Build.VERSION.SDK_INT >= 21) {
1625                     cookieManager.flush();
1626                 }
1627
1628                 // Update the Refresh menu item if it has been created.
1629                 if (refreshMenuItem != null) {
1630                     // Reset the Refresh title.
1631                     refreshMenuItem.setTitle(R.string.refresh);
1632
1633                     // If the icon is displayed in the AppBar, reset it according to the theme.
1634                     if (displayAdditionalAppBarIcons) {
1635                         if (darkTheme) {
1636                             refreshMenuItem.setIcon(R.drawable.refresh_enabled_dark);
1637                         } else {
1638                             refreshMenuItem.setIcon(R.drawable.refresh_enabled_light);
1639                         }
1640                     }
1641                 }
1642
1643                 // Reset `urlIsLoading`, which is used to prevent reloads on redirect if the user agent changes.
1644                 urlIsLoading = false;
1645
1646                 // Clear the cache and history if Incognito Mode is enabled.
1647                 if (incognitoModeEnabled) {
1648                     // Clear the cache.  `true` includes disk files.
1649                     mainWebView.clearCache(true);
1650
1651                     // Clear the back/forward history.
1652                     mainWebView.clearHistory();
1653
1654                     // Manually delete cache folders.
1655                     try {
1656                         // Delete the main cache directory.
1657                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
1658
1659                         // Delete the secondary `Service Worker` cache directory.
1660                         // A `String[]` must be used because the directory contains a space and `Runtime.exec` will not escape the string correctly otherwise.
1661                         privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
1662                     } catch (IOException e) {
1663                         // Do nothing if an error is thrown.
1664                     }
1665                 }
1666
1667                 // Update `urlTextBox` and apply domain settings if not waiting on Orbot.
1668                 if (!waitingForOrbot) {
1669                     // Check to see if `WebView` has set `url` to be `about:blank`.
1670                     if (url.equals("about:blank")) {  // `WebView` is blank, so `formattedUrlString` should be `""` and `urlTextBox` should display a hint.
1671                         // Set `formattedUrlString` to `""`.
1672                         formattedUrlString = "";
1673
1674                         urlTextBox.setText(formattedUrlString);
1675
1676                         // Request focus for `urlTextBox`.
1677                         urlTextBox.requestFocus();
1678
1679                         // Display the keyboard.
1680                         inputMethodManager.showSoftInput(urlTextBox, 0);
1681
1682                         // Apply the domain settings.  This clears any settings from the previous domain.
1683                         applyDomainSettings(formattedUrlString, true, false);
1684                     } else {  // `WebView` has loaded a webpage.
1685                         // Set `formattedUrlString`.
1686                         formattedUrlString = url;
1687
1688                         // Only update `urlTextBox` if the user is not typing in it.
1689                         if (!urlTextBox.hasFocus()) {
1690                             // Display the formatted URL text.
1691                             urlTextBox.setText(formattedUrlString);
1692
1693                             // Apply text highlighting to `urlTextBox`.
1694                             highlightUrlText();
1695                         }
1696                     }
1697
1698                     // Store the SSL certificate so it can be accessed from `ViewSslCertificateDialog` and `PinnedSslCertificateMismatchDialog`.
1699                     sslCertificate = mainWebView.getCertificate();
1700
1701                     // 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.
1702                     if (pinnedDomainSslCertificate && !ignorePinnedSslCertificate) {
1703                         // Initialize the current SSL certificate variables.
1704                         String currentWebsiteIssuedToCName = "";
1705                         String currentWebsiteIssuedToOName = "";
1706                         String currentWebsiteIssuedToUName = "";
1707                         String currentWebsiteIssuedByCName = "";
1708                         String currentWebsiteIssuedByOName = "";
1709                         String currentWebsiteIssuedByUName = "";
1710                         Date currentWebsiteSslStartDate = null;
1711                         Date currentWebsiteSslEndDate = null;
1712
1713
1714                         // Extract the individual pieces of information from the current website SSL certificate if it is not null.
1715                         if (sslCertificate != null) {
1716                             currentWebsiteIssuedToCName = sslCertificate.getIssuedTo().getCName();
1717                             currentWebsiteIssuedToOName = sslCertificate.getIssuedTo().getOName();
1718                             currentWebsiteIssuedToUName = sslCertificate.getIssuedTo().getUName();
1719                             currentWebsiteIssuedByCName = sslCertificate.getIssuedBy().getCName();
1720                             currentWebsiteIssuedByOName = sslCertificate.getIssuedBy().getOName();
1721                             currentWebsiteIssuedByUName = sslCertificate.getIssuedBy().getUName();
1722                             currentWebsiteSslStartDate = sslCertificate.getValidNotBeforeDate();
1723                             currentWebsiteSslEndDate = sslCertificate.getValidNotAfterDate();
1724                         }
1725
1726                         // 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`.
1727                         String currentWebsiteSslStartDateString = "";
1728                         String currentWebsiteSslEndDateString = "";
1729                         String pinnedDomainSslStartDateString = "";
1730                         String pinnedDomainSslEndDateString = "";
1731
1732                         // Convert the `Dates` to `Strings` if they are not `null`.
1733                         if (currentWebsiteSslStartDate != null) {
1734                             currentWebsiteSslStartDateString = currentWebsiteSslStartDate.toString();
1735                         }
1736
1737                         if (currentWebsiteSslEndDate != null) {
1738                             currentWebsiteSslEndDateString = currentWebsiteSslEndDate.toString();
1739                         }
1740
1741                         if (pinnedDomainSslStartDate != null) {
1742                             pinnedDomainSslStartDateString = pinnedDomainSslStartDate.toString();
1743                         }
1744
1745                         if (pinnedDomainSslEndDate != null) {
1746                             pinnedDomainSslEndDateString = pinnedDomainSslEndDate.toString();
1747                         }
1748
1749                         // Check to see if the pinned SSL certificate matches the current website certificate.
1750                         if (!currentWebsiteIssuedToCName.equals(pinnedDomainSslIssuedToCNameString) || !currentWebsiteIssuedToOName.equals(pinnedDomainSslIssuedToONameString) ||
1751                                 !currentWebsiteIssuedToUName.equals(pinnedDomainSslIssuedToUNameString) || !currentWebsiteIssuedByCName.equals(pinnedDomainSslIssuedByCNameString) ||
1752                                 !currentWebsiteIssuedByOName.equals(pinnedDomainSslIssuedByONameString) || !currentWebsiteIssuedByUName.equals(pinnedDomainSslIssuedByUNameString) ||
1753                                 !currentWebsiteSslStartDateString.equals(pinnedDomainSslStartDateString) || !currentWebsiteSslEndDateString.equals(pinnedDomainSslEndDateString)) {
1754                             // The pinned SSL certificate doesn't match the current domain certificate.
1755                             //Display the pinned SSL certificate mismatch `AlertDialog`.
1756                             AppCompatDialogFragment pinnedSslCertificateMismatchDialogFragment = new PinnedSslCertificateMismatchDialog();
1757                             pinnedSslCertificateMismatchDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_mismatch));
1758                         }
1759                     }
1760                 }
1761             }
1762
1763             // Handle SSL Certificate errors.
1764             @Override
1765             public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
1766                 // Get the current website SSL certificate.
1767                 SslCertificate currentWebsiteSslCertificate = error.getCertificate();
1768
1769                 // Extract the individual pieces of information from the current website SSL certificate.
1770                 String currentWebsiteIssuedToCName = currentWebsiteSslCertificate.getIssuedTo().getCName();
1771                 String currentWebsiteIssuedToOName = currentWebsiteSslCertificate.getIssuedTo().getOName();
1772                 String currentWebsiteIssuedToUName = currentWebsiteSslCertificate.getIssuedTo().getUName();
1773                 String currentWebsiteIssuedByCName = currentWebsiteSslCertificate.getIssuedBy().getCName();
1774                 String currentWebsiteIssuedByOName = currentWebsiteSslCertificate.getIssuedBy().getOName();
1775                 String currentWebsiteIssuedByUName = currentWebsiteSslCertificate.getIssuedBy().getUName();
1776                 Date currentWebsiteSslStartDate = currentWebsiteSslCertificate.getValidNotBeforeDate();
1777                 Date currentWebsiteSslEndDate = currentWebsiteSslCertificate.getValidNotAfterDate();
1778
1779                 // Proceed to the website if the current SSL website certificate matches the pinned domain certificate.
1780                 if (pinnedDomainSslCertificate &&
1781                         currentWebsiteIssuedToCName.equals(pinnedDomainSslIssuedToCNameString) && currentWebsiteIssuedToOName.equals(pinnedDomainSslIssuedToONameString) &&
1782                         currentWebsiteIssuedToUName.equals(pinnedDomainSslIssuedToUNameString) && currentWebsiteIssuedByCName.equals(pinnedDomainSslIssuedByCNameString) &&
1783                         currentWebsiteIssuedByOName.equals(pinnedDomainSslIssuedByONameString) && currentWebsiteIssuedByUName.equals(pinnedDomainSslIssuedByUNameString) &&
1784                         currentWebsiteSslStartDate.equals(pinnedDomainSslStartDate) && currentWebsiteSslEndDate.equals(pinnedDomainSslEndDate)) {
1785                     // An SSL certificate is pinned and matches the current domain certificate.
1786                     // Proceed to the website without displaying an error.
1787                     handler.proceed();
1788                 } else {  // Either there isn't a pinned SSL certificate or it doesn't match the current website certificate.
1789                     // Store `handler` so it can be accesses from `onSslErrorCancel()` and `onSslErrorProceed()`.
1790                     sslErrorHandler = handler;
1791
1792                     // Display the SSL error `AlertDialog`.
1793                     AppCompatDialogFragment sslCertificateErrorDialogFragment = SslCertificateErrorDialog.displayDialog(error);
1794                     sslCertificateErrorDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_error));
1795                 }
1796             }
1797         });
1798
1799         // Load the website if not waiting for Orbot to connect.
1800         if (!waitingForOrbot) {
1801             loadUrl(formattedUrlString);
1802         }
1803     }
1804
1805     @Override
1806     protected void onNewIntent(Intent intent) {
1807         // Sets the new intent as the activity intent, so that any future `getIntent()`s pick up this one instead of creating a new activity.
1808         setIntent(intent);
1809
1810         // Check to see if the intent contains a new URL.
1811         if (intent.getData() != null) {
1812             // Get the intent data.
1813             final Uri intentUriData = intent.getData();
1814
1815             // Load the website.
1816             loadUrl(intentUriData.toString());
1817
1818             // Close the navigation drawer if it is open.
1819             if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
1820                 drawerLayout.closeDrawer(GravityCompat.START);
1821             }
1822
1823             // Close the bookmarks drawer if it is open.
1824             if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
1825                 drawerLayout.closeDrawer(GravityCompat.END);
1826             }
1827
1828             // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
1829             mainWebView.requestFocus();
1830         }
1831     }
1832
1833     @Override
1834     public void onRestart() {
1835         // Run the default commands.
1836         super.onRestart();
1837
1838         // Make sure Orbot is running if Privacy Browser is proxying through Orbot.
1839         if (proxyThroughOrbot) {
1840             // Request Orbot to start.  If Orbot is already running no hard will be caused by this request.
1841             Intent orbotIntent = new Intent("org.torproject.android.intent.action.START");
1842
1843             // Send the intent to the Orbot package.
1844             orbotIntent.setPackage("org.torproject.android");
1845
1846             // Make it so.
1847             sendBroadcast(orbotIntent);
1848         }
1849
1850         // Apply the app settings if returning from the Settings activity..
1851         if (reapplyAppSettingsOnRestart) {
1852             // Apply the app settings.
1853             applyAppSettings();
1854
1855             // Reload the webpage if displaying of images has been disabled in the Settings activity.
1856             if (reloadOnRestart) {
1857                 // Reload `mainWebView`.
1858                 mainWebView.reload();
1859
1860                 // Reset `reloadOnRestartBoolean`.
1861                 reloadOnRestart = false;
1862             }
1863
1864             // Reset the return from settings flag.
1865             reapplyAppSettingsOnRestart = false;
1866         }
1867
1868         // Apply the domain settings if returning from the Domains activity.
1869         if (reapplyDomainSettingsOnRestart) {
1870             // Reapply the domain settings.
1871             applyDomainSettings(formattedUrlString, false, true);
1872
1873             // Reset `reapplyDomainSettingsOnRestart`.
1874             reapplyDomainSettingsOnRestart = false;
1875         }
1876
1877         // Load the URL on restart to apply changes to night mode.
1878         if (loadUrlOnRestart) {
1879             // Load the current `formattedUrlString`.
1880             loadUrl(formattedUrlString);
1881
1882             // Reset `loadUrlOnRestart.
1883             loadUrlOnRestart = false;
1884         }
1885
1886         // Update the bookmarks drawer if returning from the Bookmarks activity.
1887         if (restartFromBookmarksActivity) {
1888             // Close the bookmarks drawer.
1889             drawerLayout.closeDrawer(GravityCompat.END);
1890
1891             // Reload the bookmarks drawer.
1892             loadBookmarksFolder();
1893
1894             // Reset `restartFromBookmarksActivity`.
1895             restartFromBookmarksActivity = false;
1896         }
1897
1898         // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
1899         updatePrivacyIcons(true);
1900     }
1901
1902     // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
1903     @Override
1904     public void onResume() {
1905         // Run the default commands.
1906         super.onResume();
1907
1908         // Resume JavaScript (if enabled).
1909         mainWebView.resumeTimers();
1910
1911         // Resume `mainWebView`.
1912         mainWebView.onResume();
1913
1914         // Resume the adView for the free flavor.
1915         if (BuildConfig.FLAVOR.contentEquals("free")) {
1916             // Resume the ad.
1917             AdHelper.resumeAd(findViewById(R.id.adview));
1918         }
1919
1920         // Display a message to the user if waiting for Orbot.
1921         if (waitingForOrbot && !orbotStatus.equals("ON")) {
1922             // Disable the wide view port so that the waiting for Orbot text is displayed correctly.
1923             mainWebView.getSettings().setUseWideViewPort(false);
1924
1925             // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
1926             mainWebView.loadData(waitingForOrbotHTMLString, "text/html", null);
1927         }
1928
1929         if (displayingFullScreenVideo) {
1930             // Remove the translucent overlays.
1931             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
1932
1933             // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
1934             drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
1935
1936             /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
1937              * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
1938              * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
1939              */
1940             rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
1941         }
1942     }
1943
1944     @Override
1945     public void onPause() {
1946         // Run the default commands.
1947         super.onPause();
1948
1949         // Pause `mainWebView`.
1950         mainWebView.onPause();
1951
1952         // Stop all JavaScript.
1953         mainWebView.pauseTimers();
1954
1955         // Pause the ad or it will continue to consume resources in the background on the free flavor.
1956         if (BuildConfig.FLAVOR.contentEquals("free")) {
1957             // Pause the ad.
1958             AdHelper.pauseAd(findViewById(R.id.adview));
1959         }
1960     }
1961
1962     @Override
1963     public void onDestroy() {
1964         // Unregister the Orbot status broadcast receiver.
1965         this.unregisterReceiver(orbotStatusBroadcastReceiver);
1966
1967         // Close the bookmarks cursor and database.
1968         bookmarksCursor.close();
1969         bookmarksDatabaseHelper.close();
1970
1971         // Run the default commands.
1972         super.onDestroy();
1973     }
1974
1975     @Override
1976     public boolean onCreateOptionsMenu(Menu menu) {
1977         // Inflate the menu; this adds items to the action bar if it is present.
1978         getMenuInflater().inflate(R.menu.webview_options_menu, menu);
1979
1980         // Set mainMenu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons`.
1981         mainMenu = menu;
1982
1983         // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
1984         updatePrivacyIcons(false);
1985
1986         // Get handles for the menu items.
1987         MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
1988         MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
1989         MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
1990         MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
1991         MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
1992         refreshMenuItem = menu.findItem(R.id.refresh);
1993         blocklistsMenuItem = menu.findItem(R.id.blocklists);
1994         easyListMenuItem = menu.findItem(R.id.easylist);
1995         easyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
1996         fanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
1997         fanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
1998         ultraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
1999         blockAllThirdPartyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
2000         MenuItem adConsentMenuItem = menu.findItem(R.id.ad_consent);
2001
2002         // Only display third-party cookies if API >= 21
2003         toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
2004
2005         // Only display the form data menu items if the API < 26.
2006         toggleSaveFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
2007         clearFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
2008
2009         // Only show Ad Consent if this is the free flavor.
2010         adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
2011
2012         // Get the shared preference values.
2013         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
2014
2015         // Get the status of the additional AppBar icons.
2016         displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
2017
2018         // 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.
2019         if (displayAdditionalAppBarIcons) {
2020             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
2021             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
2022             refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
2023         } else { //Do not display the additional icons.
2024             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
2025             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
2026             refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
2027         }
2028
2029         // Replace Refresh with Stop if a URL is already loading.
2030         if (urlIsLoading) {
2031             // Set the title.
2032             refreshMenuItem.setTitle(R.string.stop);
2033
2034             // If the icon is displayed in the AppBar, set it according to the theme.
2035             if (displayAdditionalAppBarIcons) {
2036                 if (darkTheme) {
2037                     refreshMenuItem.setIcon(R.drawable.close_dark);
2038                 } else {
2039                     refreshMenuItem.setIcon(R.drawable.close_light);
2040                 }
2041             }
2042         }
2043
2044         return true;
2045     }
2046
2047     @Override
2048     public boolean onPrepareOptionsMenu(Menu menu) {
2049         // Get handles for the menu items.
2050         MenuItem addOrEditDomain = menu.findItem(R.id.add_or_edit_domain);
2051         MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
2052         MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
2053         MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
2054         MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
2055         MenuItem clearDataMenuItem = menu.findItem(R.id.clear_data);
2056         MenuItem clearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
2057         MenuItem clearDOMStorageMenuItem = menu.findItem(R.id.clear_dom_storage);
2058         MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
2059         MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
2060         MenuItem swipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
2061         MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
2062         MenuItem nightModeMenuItem = menu.findItem(R.id.night_mode);
2063
2064         // Set the text for the domain menu item.
2065         if (domainSettingsApplied) {
2066             addOrEditDomain.setTitle(R.string.edit_domain_settings);
2067         } else {
2068             addOrEditDomain.setTitle(R.string.add_domain_settings);
2069         }
2070
2071         // Set the status of the menu item checkboxes.
2072         toggleFirstPartyCookiesMenuItem.setChecked(firstPartyCookiesEnabled);
2073         toggleThirdPartyCookiesMenuItem.setChecked(thirdPartyCookiesEnabled);
2074         toggleDomStorageMenuItem.setChecked(domStorageEnabled);
2075         toggleSaveFormDataMenuItem.setChecked(saveFormDataEnabled);  // Form data can be removed once the minimum API >= 26.
2076         easyListMenuItem.setChecked(easyListEnabled);
2077         easyPrivacyMenuItem.setChecked(easyPrivacyEnabled);
2078         fanboysAnnoyanceListMenuItem.setChecked(fanboysAnnoyanceListEnabled);
2079         fanboysSocialBlockingListMenuItem.setChecked(fanboysSocialBlockingListEnabled);
2080         ultraPrivacyMenuItem.setChecked(ultraPrivacyEnabled);
2081         blockAllThirdPartyRequestsMenuItem.setChecked(blockAllThirdPartyRequests);
2082         swipeToRefreshMenuItem.setChecked(swipeRefreshLayout.isEnabled());
2083         displayImagesMenuItem.setChecked(mainWebView.getSettings().getLoadsImagesAutomatically());
2084         nightModeMenuItem.setChecked(nightMode);
2085
2086         // Enable third-party cookies if first-party cookies are enabled.
2087         toggleThirdPartyCookiesMenuItem.setEnabled(firstPartyCookiesEnabled);
2088
2089         // Enable DOM Storage if JavaScript is enabled.
2090         toggleDomStorageMenuItem.setEnabled(javaScriptEnabled);
2091
2092         // Enable Clear Cookies if there are any.
2093         clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
2094
2095         // Get a count of the number of files in the Local Storage directory.
2096         File localStorageDirectory = new File (privateDataDirectoryString + "/app_webview/Local Storage/");
2097         int localStorageDirectoryNumberOfFiles = 0;
2098         if (localStorageDirectory.exists()) {
2099             localStorageDirectoryNumberOfFiles = localStorageDirectory.list().length;
2100         }
2101
2102         // Get a count of the number of files in the IndexedDB directory.
2103         File indexedDBDirectory = new File (privateDataDirectoryString + "/app_webview/IndexedDB");
2104         int indexedDBDirectoryNumberOfFiles = 0;
2105         if (indexedDBDirectory.exists()) {
2106             indexedDBDirectoryNumberOfFiles = indexedDBDirectory.list().length;
2107         }
2108
2109         // Enable Clear DOM Storage if there is any.
2110         clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
2111
2112         // Enable Clear Form Data is there is any.  This can be removed once the minimum API >= 26.
2113         if (Build.VERSION.SDK_INT < 26) {
2114             WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(this);
2115             clearFormDataMenuItem.setEnabled(mainWebViewDatabase.hasFormData());
2116         } else {
2117             // Disable clear form data because it is not supported on current version of Android.
2118             clearFormDataMenuItem.setEnabled(false);
2119         }
2120
2121         // Enable Clear Data if any of the submenu items are enabled.
2122         clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
2123
2124         // Disable Fanboy's Social Blocking List if Fanboy's Annoyance List is checked.
2125         fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListEnabled);
2126
2127         // Initialize the display names for the blocklists with the number of blocked requests.
2128         blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + blockedRequests);
2129         easyListMenuItem.setTitle(easyListBlockedRequests + " - " + getString(R.string.easylist));
2130         easyPrivacyMenuItem.setTitle(easyPrivacyBlockedRequests + " - " + getString(R.string.easyprivacy));
2131         fanboysAnnoyanceListMenuItem.setTitle(fanboysAnnoyanceListBlockedRequests + " - " + getString(R.string.fanboys_annoyance_list));
2132         fanboysSocialBlockingListMenuItem.setTitle(fanboysSocialBlockingListBlockedRequests + " - " + getString(R.string.fanboys_social_blocking_list));
2133         ultraPrivacyMenuItem.setTitle(ultraPrivacyBlockedRequests + " - " + getString(R.string.ultraprivacy));
2134         blockAllThirdPartyRequestsMenuItem.setTitle(thirdPartyBlockedRequests + " - " + getString(R.string.block_all_third_party_requests));
2135
2136         // Get the current user agent.
2137         String currentUserAgent = mainWebView.getSettings().getUserAgentString();
2138
2139         // Select the current user agent menu item.  A switch statement cannot be used because the user agents are not compile time constants.
2140         if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[0])) {  // Privacy Browser.
2141             menu.findItem(R.id.user_agent_privacy_browser).setChecked(true);
2142         } else if (currentUserAgent.equals(webViewDefaultUserAgent)) {  // WebView Default.
2143             menu.findItem(R.id.user_agent_webview_default).setChecked(true);
2144         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[2])) {  // Firefox on Android.
2145             menu.findItem(R.id.user_agent_firefox_on_android).setChecked(true);
2146         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[3])) {  // Chrome on Android.
2147             menu.findItem(R.id.user_agent_chrome_on_android).setChecked(true);
2148         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[4])) {  // Safari on iOS.
2149             menu.findItem(R.id.user_agent_safari_on_ios).setChecked(true);
2150         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[5])) {  // Firefox on Linux.
2151             menu.findItem(R.id.user_agent_firefox_on_linux).setChecked(true);
2152         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[6])) {  // Chromium on Linux.
2153             menu.findItem(R.id.user_agent_chromium_on_linux).setChecked(true);
2154         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[7])) {  // Firefox on Windows.
2155             menu.findItem(R.id.user_agent_firefox_on_windows).setChecked(true);
2156         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[8])) {  // Chrome on Windows.
2157             menu.findItem(R.id.user_agent_chrome_on_windows).setChecked(true);
2158         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[9])) {  // Edge on Windows.
2159             menu.findItem(R.id.user_agent_edge_on_windows).setChecked(true);
2160         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[10])) {  // Internet Explorer on Windows.
2161             menu.findItem(R.id.user_agent_internet_explorer_on_windows).setChecked(true);
2162         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[11])) {  // Safari on macOS.
2163             menu.findItem(R.id.user_agent_safari_on_macos).setChecked(true);
2164         } else {  // Custom user agent.
2165             menu.findItem(R.id.user_agent_custom).setChecked(true);
2166         }
2167
2168         // Initialize font size variables.
2169         int fontSize = mainWebView.getSettings().getTextZoom();
2170         String fontSizeTitle;
2171         MenuItem selectedFontSizeMenuItem;
2172
2173         // Prepare the font size title and current size menu item.
2174         switch (fontSize) {
2175             case 25:
2176                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.twenty_five_percent);
2177                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_twenty_five_percent);
2178                 break;
2179
2180             case 50:
2181                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
2182                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
2183                 break;
2184
2185             case 75:
2186                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.seventy_five_percent);
2187                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_seventy_five_percent);
2188                 break;
2189
2190             case 100:
2191                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
2192                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
2193                 break;
2194
2195             case 125:
2196                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_twenty_five_percent);
2197                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_twenty_five_percent);
2198                 break;
2199
2200             case 150:
2201                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_fifty_percent);
2202                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_fifty_percent);
2203                 break;
2204
2205             case 175:
2206                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_seventy_five_percent);
2207                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_seventy_five_percent);
2208                 break;
2209
2210             case 200:
2211                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.two_hundred_percent);
2212                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_two_hundred_percent);
2213                 break;
2214
2215             default:
2216                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
2217                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
2218                 break;
2219         }
2220
2221         // Set the font size title and select the current size menu item.
2222         fontSizeMenuItem.setTitle(fontSizeTitle);
2223         selectedFontSizeMenuItem.setChecked(true);
2224
2225         // Run all the other default commands.
2226         super.onPrepareOptionsMenu(menu);
2227
2228         // Display the menu.
2229         return true;
2230     }
2231
2232     @Override
2233     // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
2234     @SuppressLint("SetJavaScriptEnabled")
2235     // removeAllCookies is deprecated, but it is required for API < 21.
2236     @SuppressWarnings("deprecation")
2237     public boolean onOptionsItemSelected(MenuItem menuItem) {
2238         // Get the selected menu item ID.
2239         int menuItemId = menuItem.getItemId();
2240
2241         // Set the commands that relate to the menu entries.
2242         switch (menuItemId) {
2243             case R.id.toggle_javascript:
2244                 // Switch the status of javaScriptEnabled.
2245                 javaScriptEnabled = !javaScriptEnabled;
2246
2247                 // Apply the new JavaScript status.
2248                 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
2249
2250                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2251                 updatePrivacyIcons(true);
2252
2253                 // Display a `Snackbar`.
2254                 if (javaScriptEnabled) {  // JavaScrip is enabled.
2255                     Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
2256                 } else if (firstPartyCookiesEnabled) {  // JavaScript is disabled, but first-party cookies are enabled.
2257                     Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
2258                 } else {  // Privacy mode.
2259                     Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
2260                 }
2261
2262                 // Reload the WebView.
2263                 mainWebView.reload();
2264                 return true;
2265
2266             case R.id.add_or_edit_domain:
2267                 if (domainSettingsApplied) {  // Edit the current domain settings.
2268                     // Reapply the domain settings on returning to `MainWebViewActivity`.
2269                     reapplyDomainSettingsOnRestart = true;
2270                     currentDomainName = "";
2271
2272                     // Create an intent to launch the domains activity.
2273                     Intent domainsIntent = new Intent(this, DomainsActivity.class);
2274
2275                     // Put extra information instructing the domains activity to directly load the current domain and close on back instead of returning to the domains list.
2276                     domainsIntent.putExtra("loadDomain", domainSettingsDatabaseId);
2277                     domainsIntent.putExtra("closeOnBack", true);
2278
2279                     // Make it so.
2280                     startActivity(domainsIntent);
2281                 } else {  // Add a new domain.
2282                     // Apply the new domain settings on returning to `MainWebViewActivity`.
2283                     reapplyDomainSettingsOnRestart = true;
2284                     currentDomainName = "";
2285
2286                     // Get the current domain
2287                     Uri currentUri = Uri.parse(formattedUrlString);
2288                     String currentDomain = currentUri.getHost();
2289
2290                     // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
2291                     DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
2292
2293                     // Create the domain and store the database ID.
2294                     int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
2295
2296                     // Create an intent to launch the domains activity.
2297                     Intent domainsIntent = new Intent(this, DomainsActivity.class);
2298
2299                     // Put extra information instructing the domains activity to directly load the new domain and close on back instead of returning to the domains list.
2300                     domainsIntent.putExtra("loadDomain", newDomainDatabaseId);
2301                     domainsIntent.putExtra("closeOnBack", true);
2302
2303                     // Make it so.
2304                     startActivity(domainsIntent);
2305                 }
2306                 return true;
2307
2308             case R.id.toggle_first_party_cookies:
2309                 // Switch the status of firstPartyCookiesEnabled.
2310                 firstPartyCookiesEnabled = !firstPartyCookiesEnabled;
2311
2312                 // Update the menu checkbox.
2313                 menuItem.setChecked(firstPartyCookiesEnabled);
2314
2315                 // Apply the new cookie status.
2316                 cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
2317
2318                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2319                 updatePrivacyIcons(true);
2320
2321                 // Display a `Snackbar`.
2322                 if (firstPartyCookiesEnabled) {  // First-party cookies are enabled.
2323                     Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
2324                 } else if (javaScriptEnabled) {  // JavaScript is still enabled.
2325                     Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
2326                 } else {  // Privacy mode.
2327                     Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
2328                 }
2329
2330                 // Reload the WebView.
2331                 mainWebView.reload();
2332                 return true;
2333
2334             case R.id.toggle_third_party_cookies:
2335                 if (Build.VERSION.SDK_INT >= 21) {
2336                     // Switch the status of thirdPartyCookiesEnabled.
2337                     thirdPartyCookiesEnabled = !thirdPartyCookiesEnabled;
2338
2339                     // Update the menu checkbox.
2340                     menuItem.setChecked(thirdPartyCookiesEnabled);
2341
2342                     // Apply the new cookie status.
2343                     cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
2344
2345                     // Display a `Snackbar`.
2346                     if (thirdPartyCookiesEnabled) {
2347                         Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
2348                     } else {
2349                         Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
2350                     }
2351
2352                     // Reload the WebView.
2353                     mainWebView.reload();
2354                 } // Else do nothing because SDK < 21.
2355                 return true;
2356
2357             case R.id.toggle_dom_storage:
2358                 // Switch the status of domStorageEnabled.
2359                 domStorageEnabled = !domStorageEnabled;
2360
2361                 // Update the menu checkbox.
2362                 menuItem.setChecked(domStorageEnabled);
2363
2364                 // Apply the new DOM Storage status.
2365                 mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
2366
2367                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2368                 updatePrivacyIcons(true);
2369
2370                 // Display a `Snackbar`.
2371                 if (domStorageEnabled) {
2372                     Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
2373                 } else {
2374                     Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
2375                 }
2376
2377                 // Reload the WebView.
2378                 mainWebView.reload();
2379                 return true;
2380
2381             // Form data can be removed once the minimum API >= 26.
2382             case R.id.toggle_save_form_data:
2383                 // Switch the status of saveFormDataEnabled.
2384                 saveFormDataEnabled = !saveFormDataEnabled;
2385
2386                 // Update the menu checkbox.
2387                 menuItem.setChecked(saveFormDataEnabled);
2388
2389                 // Apply the new form data status.
2390                 mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
2391
2392                 // Display a `Snackbar`.
2393                 if (saveFormDataEnabled) {
2394                     Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
2395                 } else {
2396                     Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
2397                 }
2398
2399                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2400                 updatePrivacyIcons(true);
2401
2402                 // Reload the WebView.
2403                 mainWebView.reload();
2404                 return true;
2405
2406             case R.id.clear_cookies:
2407                 Snackbar.make(findViewById(R.id.main_webview), R.string.cookies_deleted, Snackbar.LENGTH_LONG)
2408                         .setAction(R.string.undo, v -> {
2409                             // Do nothing because everything will be handled by `onDismissed()` below.
2410                         })
2411                         .addCallback(new Snackbar.Callback() {
2412                             @Override
2413                             public void onDismissed(Snackbar snackbar, int event) {
2414                                 switch (event) {
2415                                     // The user pushed the `Undo` button.
2416                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
2417                                         // Do nothing.
2418                                         break;
2419
2420                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
2421                                     default:
2422                                         // `cookieManager.removeAllCookie()` varies by SDK.
2423                                         if (Build.VERSION.SDK_INT < 21) {
2424                                             cookieManager.removeAllCookie();
2425                                         } else {
2426                                             // `null` indicates no callback.
2427                                             cookieManager.removeAllCookies(null);
2428                                         }
2429                                 }
2430                             }
2431                         })
2432                         .show();
2433                 return true;
2434
2435             case R.id.clear_dom_storage:
2436                 Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
2437                         .setAction(R.string.undo, v -> {
2438                             // Do nothing because everything will be handled by `onDismissed()` below.
2439                         })
2440                         .addCallback(new Snackbar.Callback() {
2441                             @Override
2442                             public void onDismissed(Snackbar snackbar, int event) {
2443                                 switch (event) {
2444                                     // The user pushed the `Undo` button.
2445                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
2446                                         // Do nothing.
2447                                         break;
2448
2449                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
2450                                     default:
2451                                         // Delete the DOM Storage.
2452                                         WebStorage webStorage = WebStorage.getInstance();
2453                                         webStorage.deleteAllData();
2454
2455                                         // Manually delete the DOM storage files and directories.
2456                                         try {
2457                                             // A `String[]` must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
2458                                             privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
2459
2460                                             // Multiple commands must be used because `Runtime.exec()` does not like `*`.
2461                                             privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
2462                                             privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
2463                                             privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
2464                                             privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
2465                                         } catch (IOException e) {
2466                                             // Do nothing if an error is thrown.
2467                                         }
2468                                 }
2469                             }
2470                         })
2471                         .show();
2472                 return true;
2473
2474             // Form data can be remove once the minimum API >= 26.
2475             case R.id.clear_form_data:
2476                 Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_deleted, Snackbar.LENGTH_LONG)
2477                         .setAction(R.string.undo, v -> {
2478                             // Do nothing because everything will be handled by `onDismissed()` below.
2479                         })
2480                         .addCallback(new Snackbar.Callback() {
2481                             @Override
2482                             public void onDismissed(Snackbar snackbar, int event) {
2483                                 switch (event) {
2484                                     // The user pushed the `Undo` button.
2485                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
2486                                         // Do nothing.
2487                                         break;
2488
2489                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
2490                                     default:
2491                                         // Delete the form data.
2492                                         WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
2493                                         mainWebViewDatabase.clearFormData();
2494                                 }
2495                             }
2496                         })
2497                         .show();
2498                 return true;
2499
2500             case R.id.easylist:
2501                 // Toggle the EasyList status.
2502                 easyListEnabled = !easyListEnabled;
2503
2504                 // Update the menu checkbox.
2505                 menuItem.setChecked(easyListEnabled);
2506
2507                 // Reload the main WebView.
2508                 mainWebView.reload();
2509                 return true;
2510
2511             case R.id.easyprivacy:
2512                 // Toggle the EasyPrivacy status.
2513                 easyPrivacyEnabled = !easyPrivacyEnabled;
2514
2515                 // Update the menu checkbox.
2516                 menuItem.setChecked(easyPrivacyEnabled);
2517
2518                 // Reload the main WebView.
2519                 mainWebView.reload();
2520                 return true;
2521
2522             case R.id.fanboys_annoyance_list:
2523                 // Toggle Fanboy's Annoyance List status.
2524                 fanboysAnnoyanceListEnabled = !fanboysAnnoyanceListEnabled;
2525
2526                 // Update the menu checkbox.
2527                 menuItem.setChecked(fanboysAnnoyanceListEnabled);
2528
2529                 // Update the staus of Fanboy's Social Blocking List.
2530                 MenuItem fanboysSocialBlockingListMenuItem = mainMenu.findItem(R.id.fanboys_social_blocking_list);
2531                 fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListEnabled);
2532
2533                 // Reload the main WebView.
2534                 mainWebView.reload();
2535                 return true;
2536
2537             case R.id.fanboys_social_blocking_list:
2538                 // Toggle Fanboy's Social Blocking List status.
2539                 fanboysSocialBlockingListEnabled = !fanboysSocialBlockingListEnabled;
2540
2541                 // Update the menu checkbox.
2542                 menuItem.setChecked(fanboysSocialBlockingListEnabled);
2543
2544                 // Reload the main WebView.
2545                 mainWebView.reload();
2546                 return true;
2547
2548             case R.id.ultraprivacy:
2549                 // Toggle the UltraPrivacy status.
2550                 ultraPrivacyEnabled = !ultraPrivacyEnabled;
2551
2552                 // Update the menu checkbox.
2553                 menuItem.setChecked(ultraPrivacyEnabled);
2554
2555                 // Reload the main WebView.
2556                 mainWebView.reload();
2557                 return true;
2558
2559             case R.id.block_all_third_party_requests:
2560                 //Toggle the third-party requests blocker status.
2561                 blockAllThirdPartyRequests = !blockAllThirdPartyRequests;
2562
2563                 // Update the menu checkbox.
2564                 menuItem.setChecked(blockAllThirdPartyRequests);
2565
2566                 // Reload the main WebView.
2567                 mainWebView.reload();
2568                 return true;
2569
2570             case R.id.user_agent_privacy_browser:
2571                 // Update the user agent.
2572                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
2573
2574                 // Reload the WebView.
2575                 mainWebView.reload();
2576                 return true;
2577
2578             case R.id.user_agent_webview_default:
2579                 // Update the user agent.
2580                 mainWebView.getSettings().setUserAgentString("");
2581
2582                 // Reload the WebView.
2583                 mainWebView.reload();
2584                 return true;
2585
2586             case R.id.user_agent_firefox_on_android:
2587                 // Update the user agent.
2588                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
2589
2590                 // Reload the WebView.
2591                 mainWebView.reload();
2592                 return true;
2593
2594           &