Handle web search intents. https://redmine.stoutner.com/issues/184
[PrivacyBrowser.git] / app / src / main / java / com / stoutner / privacybrowser / activities / MainWebViewActivity.java
1 /*
2  * Copyright © 2015-2018 Soren Stoutner <soren@stoutner.com>.
3  *
4  * Download cookie code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
5  *
6  * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
7  *
8  * Privacy Browser is free software: you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation, either version 3 of the License, or
11  * (at your option) any later version.
12  *
13  * Privacy Browser is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
20  */
21
22 package com.stoutner.privacybrowser.activities;
23
24 import android.Manifest;
25 import android.annotation.SuppressLint;
26 import android.app.Activity;
27 import android.app.DialogFragment;
28 import android.app.DownloadManager;
29 import android.app.SearchManager;
30 import android.content.ActivityNotFoundException;
31 import android.content.BroadcastReceiver;
32 import android.content.ClipData;
33 import android.content.ClipboardManager;
34 import android.content.Context;
35 import android.content.Intent;
36 import android.content.IntentFilter;
37 import android.content.SharedPreferences;
38 import android.content.pm.PackageManager;
39 import android.content.res.Configuration;
40 import android.database.Cursor;
41 import android.graphics.Bitmap;
42 import android.graphics.BitmapFactory;
43 import android.graphics.Typeface;
44 import android.graphics.drawable.BitmapDrawable;
45 import android.graphics.drawable.Drawable;
46 import android.net.Uri;
47 import android.net.http.SslCertificate;
48 import android.net.http.SslError;
49 import android.os.Build;
50 import android.os.Bundle;
51 import android.os.Environment;
52 import android.os.Handler;
53 import android.preference.PreferenceManager;
54 import android.print.PrintDocumentAdapter;
55 import android.print.PrintManager;
56 import android.support.annotation.NonNull;
57 import android.support.design.widget.CoordinatorLayout;
58 import android.support.design.widget.FloatingActionButton;
59 import android.support.design.widget.NavigationView;
60 import android.support.design.widget.Snackbar;
61 import android.support.v4.app.ActivityCompat;
62 import android.support.v4.content.ContextCompat;
63 // `ShortcutInfoCompat`, `ShortcutManagerCompat`, and `IconCompat` can be switched to the non-compat version once API >= 26.
64 import android.support.v4.content.pm.ShortcutInfoCompat;
65 import android.support.v4.content.pm.ShortcutManagerCompat;
66 import android.support.v4.graphics.drawable.IconCompat;
67 import android.support.v4.view.GravityCompat;
68 import android.support.v4.widget.DrawerLayout;
69 import android.support.v4.widget.SwipeRefreshLayout;
70 import android.support.v7.app.ActionBar;
71 import android.support.v7.app.ActionBarDrawerToggle;
72 import android.support.v7.app.AppCompatActivity;
73 import android.support.v7.app.AppCompatDialogFragment;
74 import android.support.v7.widget.Toolbar;
75 import android.text.Editable;
76 import android.text.Spanned;
77 import android.text.TextWatcher;
78 import android.text.style.ForegroundColorSpan;
79 import android.util.Log;
80 import android.util.Patterns;
81 import android.view.ContextMenu;
82 import android.view.GestureDetector;
83 import android.view.KeyEvent;
84 import android.view.Menu;
85 import android.view.MenuItem;
86 import android.view.MotionEvent;
87 import android.view.View;
88 import android.view.ViewGroup;
89 import android.view.WindowManager;
90 import android.view.inputmethod.InputMethodManager;
91 import android.webkit.CookieManager;
92 import android.webkit.HttpAuthHandler;
93 import android.webkit.SslErrorHandler;
94 import android.webkit.ValueCallback;
95 import android.webkit.WebBackForwardList;
96 import android.webkit.WebChromeClient;
97 import android.webkit.WebResourceResponse;
98 import android.webkit.WebStorage;
99 import android.webkit.WebView;
100 import android.webkit.WebViewClient;
101 import android.webkit.WebViewDatabase;
102 import android.widget.ArrayAdapter;
103 import android.widget.CursorAdapter;
104 import android.widget.EditText;
105 import android.widget.FrameLayout;
106 import android.widget.ImageView;
107 import android.widget.LinearLayout;
108 import android.widget.ListView;
109 import android.widget.ProgressBar;
110 import android.widget.RadioButton;
111 import android.widget.RelativeLayout;
112 import android.widget.TextView;
113
114 import com.stoutner.privacybrowser.BuildConfig;
115 import com.stoutner.privacybrowser.R;
116 import com.stoutner.privacybrowser.dialogs.AdConsentDialog;
117 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
118 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
119 import com.stoutner.privacybrowser.dialogs.CreateHomeScreenShortcutDialog;
120 import com.stoutner.privacybrowser.dialogs.DownloadImageDialog;
121 import com.stoutner.privacybrowser.dialogs.DownloadLocationPermissionDialog;
122 import com.stoutner.privacybrowser.dialogs.EditBookmarkDialog;
123 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
124 import com.stoutner.privacybrowser.dialogs.HttpAuthenticationDialog;
125 import com.stoutner.privacybrowser.dialogs.PinnedSslCertificateMismatchDialog;
126 import com.stoutner.privacybrowser.dialogs.UrlHistoryDialog;
127 import com.stoutner.privacybrowser.dialogs.ViewSslCertificateDialog;
128 import com.stoutner.privacybrowser.helpers.AdHelper;
129 import com.stoutner.privacybrowser.helpers.BlockListHelper;
130 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
131 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
132 import com.stoutner.privacybrowser.helpers.OrbotProxyHelper;
133 import com.stoutner.privacybrowser.dialogs.DownloadFileDialog;
134 import com.stoutner.privacybrowser.dialogs.SslCertificateErrorDialog;
135
136 import java.io.ByteArrayInputStream;
137 import java.io.ByteArrayOutputStream;
138 import java.io.File;
139 import java.io.IOException;
140 import java.io.UnsupportedEncodingException;
141 import java.net.MalformedURLException;
142 import java.net.URL;
143 import java.net.URLDecoder;
144 import java.net.URLEncoder;
145 import java.util.ArrayList;
146 import java.util.Date;
147 import java.util.HashMap;
148 import java.util.HashSet;
149 import java.util.List;
150 import java.util.Map;
151 import java.util.Set;
152
153 // AppCompatActivity from android.support.v7.app.AppCompatActivity must be used to have access to the SupportActionBar until the minimum API is >= 21.
154 public class MainWebViewActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener,
155         CreateHomeScreenShortcutDialog.CreateHomeScreenShortcutListener, DownloadFileDialog.DownloadFileListener, DownloadImageDialog.DownloadImageListener,
156         DownloadLocationPermissionDialog.DownloadLocationPermissionDialogListener, EditBookmarkDialog.EditBookmarkListener, EditBookmarkFolderDialog.EditBookmarkFolderListener,
157         HttpAuthenticationDialog.HttpAuthenticationListener, NavigationView.OnNavigationItemSelectedListener, PinnedSslCertificateMismatchDialog.PinnedSslCertificateMismatchListener,
158         SslCertificateErrorDialog.SslCertificateErrorListener, UrlHistoryDialog.UrlHistoryListener {
159
160     // `darkTheme` is public static so it can be accessed from everywhere.
161     public static boolean darkTheme;
162
163     // `allowScreenshots` is public static so it can be accessed from everywhere.  It is also used in `onCreate()`.
164     public static boolean allowScreenshots;
165
166     // `favoriteIconBitmap` is public static so it can be accessed from `CreateHomeScreenShortcutDialog`, `BookmarksActivity`, `BookmarksDatabaseViewActivity`, `CreateBookmarkDialog`,
167     // `CreateBookmarkFolderDialog`, `EditBookmarkDialog`, `EditBookmarkFolderDialog`, `EditBookmarkDatabaseViewDialog`, and `ViewSslCertificateDialog`.  It is also used in `onCreate()`,
168     // `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onCreateHomeScreenShortcutCreate()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `applyDomainSettings()`.
169     public static Bitmap favoriteIconBitmap;
170
171     // `formattedUrlString` is public static so it can be accessed from `BookmarksActivity`, `CreateBookmarkDialog`, and `AddDomainDialog`.
172     // It is also used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onCreateHomeScreenShortcutCreate()`, `loadUrlFromTextBox()`, and `applyProxyThroughOrbot()`.
173     public static String formattedUrlString;
174
175     // `sslCertificate` is public static so it can be accessed from `DomainsActivity`, `DomainsListFragment`, `DomainSettingsFragment`, `PinnedSslCertificateMismatchDialog`,
176     // and `ViewSslCertificateDialog`.  It is also used in `onCreate()`.
177     public static SslCertificate sslCertificate;
178
179     // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()`, `onResume()`, and `applyProxyThroughOrbot()`.
180     public static String orbotStatus;
181
182     // `webViewTitle` is public static so it can be accessed from `CreateBookmarkDialog` and `CreateHomeScreenShortcutDialog`.  It is also used in `onCreate()`.
183     public static String webViewTitle;
184
185     // `appliedUserAgentString` is public static so it can be accessed from `ViewSourceActivity`.  It is also used in `applyDomainSettings()`.
186     public static String appliedUserAgentString;
187
188     // `reloadOnRestart` is public static so it can be accessed from `SettingsFragment`.  It is also used in `onRestart()`
189     public static boolean reloadOnRestart;
190
191     // `reloadUrlOnRestart` is public static so it can be accessed from `SettingsFragment` and `BookmarksActivity`.  It is also used in `onRestart()`.
192     public static boolean loadUrlOnRestart;
193
194     // `restartFromBookmarksActivity` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onRestart()`.
195     public static boolean restartFromBookmarksActivity;
196
197     // The block list versions are public static so they can be accessed from `AboutTabFragment`.  They are also used in `onCreate()`.
198     public static String easyListVersion;
199     public static String easyPrivacyVersion;
200     public static String fanboysAnnoyanceVersion;
201     public static String fanboysSocialVersion;
202     public static String ultraPrivacyVersion;
203
204     // The request items are public static so they can be accessed by `BlockListHelper`, `RequestsArrayAdapter`, and `ViewRequestsDialog`.  They are also used in `onCreate()` and `onPrepareOptionsMenu()`.
205     public static List<String[]> resourceRequests;
206     public static String[] whiteListResultStringArray;
207     private int blockedRequests;
208     private int easyListBlockedRequests;
209     private int easyPrivacyBlockedRequests;
210     private int fanboysAnnoyanceListBlockedRequests;
211     private int fanboysSocialBlockingListBlockedRequests;
212     private int ultraPrivacyBlockedRequests;
213     private int thirdPartyBlockedRequests;
214
215     public final static int REQUEST_DISPOSITION = 0;
216     public final static int REQUEST_URL = 1;
217     public final static int REQUEST_BLOCKLIST = 2;
218     public final static int REQUEST_SUBLIST = 3;
219     public final static int REQUEST_BLOCKLIST_ENTRIES = 4;
220     public final static int REQUEST_BLOCKLIST_ORIGINAL_ENTRY = 5;
221
222     public final static int REQUEST_DEFAULT = 0;
223     public final static int REQUEST_ALLOWED = 1;
224     public final static int REQUEST_THIRD_PARTY = 2;
225     public final static int REQUEST_BLOCKED = 3;
226
227     public final static int MAIN_WHITELIST = 1;
228     public final static int FINAL_WHITELIST = 2;
229     public final static int DOMAIN_WHITELIST = 3;
230     public final static int DOMAIN_INITIAL_WHITELIST = 4;
231     public final static int DOMAIN_FINAL_WHITELIST = 5;
232     public final static int THIRD_PARTY_WHITELIST = 6;
233     public final static int THIRD_PARTY_DOMAIN_WHITELIST = 7;
234     public final static int THIRD_PARTY_DOMAIN_INITIAL_WHITELIST = 8;
235
236     public final static int MAIN_BLACKLIST = 9;
237     public final static int INITIAL_BLACKLIST = 10;
238     public final static int FINAL_BLACKLIST = 11;
239     public final static int DOMAIN_BLACKLIST = 12;
240     public final static int DOMAIN_INITIAL_BLACKLIST = 13;
241     public final static int DOMAIN_FINAL_BLACKLIST = 14;
242     public final static int DOMAIN_REGULAR_EXPRESSION_BLACKLIST = 15;
243     public final static int THIRD_PARTY_BLACKLIST = 16;
244     public final static int THIRD_PARTY_INITIAL_BLACKLIST = 17;
245     public final static int THIRD_PARTY_DOMAIN_BLACKLIST = 18;
246     public final static int THIRD_PARTY_DOMAIN_INITIAL_BLACKLIST = 19;
247     public final static int THIRD_PARTY_REGULAR_EXPRESSION_BLACKLIST = 20;
248     public final static int THIRD_PARTY_DOMAIN_REGULAR_EXPRESSION_BLACKLIST = 21;
249     public final static int REGULAR_EXPRESSION_BLACKLIST = 22;
250
251     // `blockAllThirdPartyRequests` is public static so it can be accessed from `RequestsActivity`.
252     // It is also used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`
253     public static boolean blockAllThirdPartyRequests;
254
255     // `currentBookmarksFolder` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onCreate()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`,
256     // `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
257     public static String currentBookmarksFolder;
258
259     // `domainSettingsDatabaseId` is public static so it can be accessed from `PinnedSslCertificateMismatchDialog`.  It is also used in `onCreate()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
260     public static int domainSettingsDatabaseId;
261
262     // The pinned domain SSL Certificate variables are public static so they can be accessed from `PinnedSslCertificateMismatchDialog`.  They are also used in `onCreate()` and `applyDomainSettings()`.
263     public static String pinnedDomainSslIssuedToCNameString;
264     public static String pinnedDomainSslIssuedToONameString;
265     public static String pinnedDomainSslIssuedToUNameString;
266     public static String pinnedDomainSslIssuedByCNameString;
267     public static String pinnedDomainSslIssuedByONameString;
268     public static String pinnedDomainSslIssuedByUNameString;
269     public static Date pinnedDomainSslStartDate;
270     public static Date pinnedDomainSslEndDate;
271
272     // The user agent constants are public static so they can be accessed from `SettingsFragment`, `DomainsActivity`, and `DomainSettingsFragment`.
273     public final static int UNRECOGNIZED_USER_AGENT = -1;
274     public final static int SETTINGS_WEBVIEW_DEFAULT_USER_AGENT = 1;
275     public final static int SETTINGS_CUSTOM_USER_AGENT = 12;
276     public final static int DOMAINS_SYSTEM_DEFAULT_USER_AGENT = 0;
277     public final static int DOMAINS_WEBVIEW_DEFAULT_USER_AGENT = 2;
278     public final static int DOMAINS_CUSTOM_USER_AGENT = 13;
279
280
281     // `appBar` is used in `onCreate()`, `onOptionsItemSelected()`, `closeFindOnPage()`, `applyAppSettings()`, and `applyProxyThroughOrbot()`.
282     private ActionBar appBar;
283
284     // `navigatingHistory` is used in `onCreate()`, `onNavigationItemSelected()`, `onSslMismatchBack()`, and `applyDomainSettings()`.
285     private boolean navigatingHistory;
286
287     // `favoriteIconDefaultBitmap` is used in `onCreate()` and `applyDomainSettings`.
288     private Bitmap favoriteIconDefaultBitmap;
289
290     // `drawerLayout` is used in `onCreate()`, `onNewIntent()`, `onBackPressed()`, and `onRestart()`.
291     private DrawerLayout drawerLayout;
292
293     // `rootCoordinatorLayout` is used in `onCreate()` and `applyAppSettings()`.
294     private CoordinatorLayout rootCoordinatorLayout;
295
296     // `mainWebView` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`,
297     // `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`, `onSslMismatchBack()`, and `applyProxyThroughOrbot()`.
298     private WebView mainWebView;
299
300     // `fullScreenVideoFrameLayout` is used in `onCreate()` and `onConfigurationChanged()`.
301     private FrameLayout fullScreenVideoFrameLayout;
302
303     // `swipeRefreshLayout` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `onRestart()`.
304     private SwipeRefreshLayout swipeRefreshLayout;
305
306     // `urlAppBarRelativeLayout` is used in `onCreate()` and `applyDomainSettings()`.
307     private RelativeLayout urlAppBarRelativeLayout;
308
309     // `favoriteIconImageView` is used in `onCreate()` and `applyDomainSettings()`
310     private ImageView favoriteIconImageView;
311
312     // `cookieManager` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`, `loadUrlFromTextBox()`, `onDownloadImage()`, `onDownloadFile()`, and `onRestart()`.
313     private CookieManager cookieManager;
314
315     // `customHeader` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateContextMenu()`, and `loadUrl()`.
316     private final Map<String, String> customHeaders = new HashMap<>();
317
318     // `javaScriptEnabled` is also used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `applyDomainSettings()`, and `updatePrivacyIcons()`.
319     private boolean javaScriptEnabled;
320
321     // `firstPartyCookiesEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onDownloadImage()`, `onDownloadFile()`, and `applyDomainSettings()`.
322     private boolean firstPartyCookiesEnabled;
323
324     // `thirdPartyCookiesEnabled` used in `onCreate()`, `onPrepareOptionsMenu()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
325     private boolean thirdPartyCookiesEnabled;
326
327     // `domStorageEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
328     private boolean domStorageEnabled;
329
330     // `saveFormDataEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.  It can be removed once the minimum API >= 26.
331     private boolean saveFormDataEnabled;
332
333     // `nightMode` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and  `applyDomainSettings()`.
334     private boolean nightMode;
335
336     // 'homepage' is used in `onCreate()`, `onNavigationItemSelected()`, and `applyProxyThroughOrbot()`.
337     private String homepage;
338
339     // `searchURL` is used in `loadURLFromTextBox()` and `applyProxyThroughOrbot()`.
340     private String searchURL;
341
342     // `mainMenu` is used in `onCreateOptionsMenu()` and `updatePrivacyIcons()`.
343     private Menu mainMenu;
344
345     // `refreshMenuItem` is used in `onCreate()` and `onCreateOptionsMenu()`.
346     private MenuItem refreshMenuItem;
347
348     // The blocklist menu items are used in `onCreate()`, `onCreateOptionsMenu()`, and `onPrepareOptionsMenu()`.
349     private MenuItem blocklistsMenuItem;
350     private MenuItem easyListMenuItem;
351     private MenuItem easyPrivacyMenuItem;
352     private MenuItem fanboysAnnoyanceListMenuItem;
353     private MenuItem fanboysSocialBlockingListMenuItem;
354     private MenuItem ultraPrivacyMenuItem;
355     private MenuItem blockAllThirdPartyRequestsMenuItem;
356
357     // The blocklist variables are used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
358     private boolean easyListEnabled;
359     private boolean easyPrivacyEnabled;
360     private boolean fanboysAnnoyanceListEnabled;
361     private boolean fanboysSocialBlockingListEnabled;
362     private boolean ultraPrivacyEnabled;
363
364     // `webViewDefaultUserAgent` is used in `onCreate()` and `onPrepareOptionsMenu()`.
365     private String webViewDefaultUserAgent;
366
367     // `defaultCustomUserAgentString` is used in `onPrepareOptionsMenu()` and `applyDomainSettings()`.
368     private String defaultCustomUserAgentString;
369
370     // `privacyBrowserRuntime` is used in `onCreate()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
371     private Runtime privacyBrowserRuntime;
372
373     // `proxyThroughOrbot` is used in `onRestart()`, `onOptionsItemSelected()`, `applyAppSettings()`, and `applyProxyThroughOrbot()`.
374     private boolean proxyThroughOrbot;
375
376     // `incognitoModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
377     private boolean incognitoModeEnabled;
378
379     // `fullScreenBrowsingModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
380     private boolean fullScreenBrowsingModeEnabled;
381
382     // `inFullScreenBrowsingMode` is used in `onCreate()`, `onConfigurationChanged()`, and `applyAppSettings()`.
383     private boolean inFullScreenBrowsingMode;
384
385     // `hideSystemBarsOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
386     private boolean hideSystemBarsOnFullscreen;
387
388     // `translucentNavigationBarOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
389     private boolean translucentNavigationBarOnFullscreen;
390
391     // `reapplyDomainSettingsOnRestart` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, and `onAddDomain()`, .
392     private boolean reapplyDomainSettingsOnRestart;
393
394     // `reapplyAppSettingsOnRestart` is used in `onNavigationItemSelected()` and `onRestart()`.
395     private boolean reapplyAppSettingsOnRestart;
396
397     // `displayingFullScreenVideo` is used in `onCreate()` and `onResume()`.
398     private boolean displayingFullScreenVideo;
399
400     // `downloadWithExternalApp` is used in `onCreate()`, `onCreateContextMenu()`, and `applyDomainSettings()`.
401     private boolean downloadWithExternalApp;
402
403     // `currentDomainName` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onAddDomain()`, and `applyDomainSettings()`.
404     private String currentDomainName;
405
406     // `ignorePinnedSslCertificateForDomain` is used in `onCreate()`, `onSslMismatchProceed()`, and `applyDomainSettings()`.
407     private boolean ignorePinnedSslCertificate;
408
409     // `orbotStatusBroadcastReceiver` is used in `onCreate()` and `onDestroy()`.
410     private BroadcastReceiver orbotStatusBroadcastReceiver;
411
412     // `waitingForOrbot` is used in `onCreate()`, `onResume()`, and `applyProxyThroughOrbot()`.
413     private boolean waitingForOrbot;
414
415     // `domainSettingsApplied` is used in `prepareOptionsMenu()` and `applyDomainSettings()`.
416     private boolean domainSettingsApplied;
417
418     // `domainSettingsJavaScriptEnabled` is used in `onOptionsItemSelected()` and `applyDomainSettings()`.
419     private Boolean domainSettingsJavaScriptEnabled;
420
421     // `waitingForOrbotHtmlString` is used in `onCreate()` and `applyProxyThroughOrbot()`.
422     private String waitingForOrbotHtmlString;
423
424     // `privateDataDirectoryString` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`.
425     private String privateDataDirectoryString;
426
427     // `findOnPageLinearLayout` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
428     private LinearLayout findOnPageLinearLayout;
429
430     // `findOnPageEditText` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
431     private EditText findOnPageEditText;
432
433     // `displayAdditionalAppBarIcons` is used in `onCreate()` and `onCreateOptionsMenu()`.
434     private boolean displayAdditionalAppBarIcons;
435
436     // `drawerToggle` is used in `onCreate()`, `onPostCreate()`, `onConfigurationChanged()`, `onNewIntent()`, and `onNavigationItemSelected()`.
437     private ActionBarDrawerToggle drawerToggle;
438
439     // `supportAppBar` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
440     private Toolbar supportAppBar;
441
442     // `urlTextBox` is used in `onCreate()`, `onOptionsItemSelected()`, `loadUrlFromTextBox()`, `loadUrl()`, and `highlightUrlText()`.
443     private EditText urlTextBox;
444
445     // The color spans are used in `onCreate()` and `highlightUrlText()`.
446     private ForegroundColorSpan redColorSpan;
447     private ForegroundColorSpan initialGrayColorSpan;
448     private ForegroundColorSpan finalGrayColorSpan;
449
450     // `sslErrorHandler` is used in `onCreate()`, `onSslErrorCancel()`, and `onSslErrorProceed`.
451     private SslErrorHandler sslErrorHandler;
452
453     // `httpAuthHandler` is used in `onCreate()`, `onHttpAuthenticationCancel()`, and `onHttpAuthenticationProceed()`.
454     private static HttpAuthHandler httpAuthHandler;
455
456     // `inputMethodManager` is used in `onOptionsItemSelected()`, `loadUrlFromTextBox()`, and `closeFindOnPage()`.
457     private InputMethodManager inputMethodManager;
458
459     // `mainWebViewRelativeLayout` is used in `onCreate()` and `onNavigationItemSelected()`.
460     private RelativeLayout mainWebViewRelativeLayout;
461
462     // `urlIsLoading` is used in `onCreate()`, `onCreateOptionsMenu()`, `loadUrl()`, and `applyDomainSettings()`.
463     private boolean urlIsLoading;
464
465     // `pinnedDomainSslCertificate` is used in `onCreate()` and `applyDomainSettings()`.
466     private boolean pinnedDomainSslCertificate;
467
468     // `bookmarksDatabaseHelper` is used in `onCreate()`, `onDestroy`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`,
469     // and `loadBookmarksFolder()`.
470     private BookmarksDatabaseHelper bookmarksDatabaseHelper;
471
472     // `bookmarksListView` is used in `onCreate()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, and `loadBookmarksFolder()`.
473     private ListView bookmarksListView;
474
475     // `bookmarksTitleTextView` is used in `onCreate()` and `loadBookmarksFolder()`.
476     private TextView bookmarksTitleTextView;
477
478     // `bookmarksCursor` is used in `onDestroy()`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
479     private Cursor bookmarksCursor;
480
481     // `bookmarksCursorAdapter` is used in `onCreateBookmark()`, `onCreateBookmarkFolder()` `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
482     private CursorAdapter bookmarksCursorAdapter;
483
484     // `oldFolderNameString` is used in `onCreate()` and `onSaveEditBookmarkFolder()`.
485     private String oldFolderNameString;
486
487     // `fileChooserCallback` is used in `onCreate()` and `onActivityResult()`.
488     private ValueCallback<Uri[]> fileChooserCallback;
489
490     // The download strings are used in `onCreate()` and `onRequestPermissionResult()`.
491     private String downloadUrl;
492     private String downloadContentDisposition;
493     private long downloadContentLength;
494
495     // `downloadImageUrl` is used in `onCreateContextMenu()` and `onRequestPermissionResult()`.
496     private String downloadImageUrl;
497
498     // The user agent variables are used in `onCreate()` and `applyDomainSettings()`.
499     private ArrayAdapter<CharSequence> userAgentNamesArray;
500     private String[] userAgentDataArray;
501
502     // The request codes are used in `onCreate()`, `onCreateContextMenu()`, `onCloseDownloadLocationPermissionDialog()`, and `onRequestPermissionResult()`.
503     private final int DOWNLOAD_FILE_REQUEST_CODE = 1;
504     private final int DOWNLOAD_IMAGE_REQUEST_CODE = 2;
505
506     @Override
507     // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.  The whole premise of Privacy Browser is built around an understanding of these dangers.
508     // Also, remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
509     @SuppressLint({"SetJavaScriptEnabled", "ClickableViewAccessibility"})
510     // Remove Android Studio's warning about deprecations.  We have to use the deprecated `getColor()` until API >= 23.
511     @SuppressWarnings("deprecation")
512     protected void onCreate(Bundle savedInstanceState) {
513         // Get a handle for the shared preferences.
514         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
515
516         // Get the theme and screenshot preferences.
517         darkTheme = sharedPreferences.getBoolean("dark_theme", false);
518         allowScreenshots = sharedPreferences.getBoolean("allow_screenshots", false);
519
520         // Disable screenshots if not allowed.
521         if (!allowScreenshots) {
522             getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
523         }
524
525         // Set the activity theme.
526         if (darkTheme) {
527             setTheme(R.style.PrivacyBrowserDark);
528         } else {
529             setTheme(R.style.PrivacyBrowserLight);
530         }
531
532         // Run the default commands.
533         super.onCreate(savedInstanceState);
534
535         // Set the content view.
536         setContentView(R.layout.main_drawerlayout);
537
538         // Get a handle for `inputMethodManager`.
539         inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
540
541         // `SupportActionBar` from `android.support.v7.app.ActionBar` must be used until the minimum API is >= 21.
542         supportAppBar = findViewById(R.id.app_bar);
543         setSupportActionBar(supportAppBar);
544         appBar = getSupportActionBar();
545
546         // This is needed to get rid of the Android Studio warning that `appBar` might be null.
547         assert appBar != null;
548
549         // Add the custom `url_app_bar` layout, which shows the favorite icon and the URL text bar.
550         appBar.setCustomView(R.layout.url_app_bar);
551         appBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
552
553         // Initialize the foreground color spans for highlighting the URLs.  We have to use the deprecated `getColor()` until API >= 23.
554         redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_a700));
555         initialGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
556         finalGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
557
558         // Get a handle for `urlTextBox`.
559         urlTextBox = findViewById(R.id.url_edittext);
560
561         // Remove the formatting from `urlTextBar` when the user is editing the text.
562         urlTextBox.setOnFocusChangeListener((View v, boolean hasFocus) -> {
563             if (hasFocus) {  // The user is editing the URL text box.
564                 // Remove the highlighting.
565                 urlTextBox.getText().removeSpan(redColorSpan);
566                 urlTextBox.getText().removeSpan(initialGrayColorSpan);
567                 urlTextBox.getText().removeSpan(finalGrayColorSpan);
568             } else {  // The user has stopped editing the URL text box.
569                 // Move to the beginning of the string.
570                 urlTextBox.setSelection(0);
571
572                 // Reapply the highlighting.
573                 highlightUrlText();
574             }
575         });
576
577         // Set the go button on the keyboard to load the URL in `urlTextBox`.
578         urlTextBox.setOnKeyListener((View v, int keyCode, KeyEvent event) -> {
579             // If the event is a key-down event on the `enter` button, load the URL.
580             if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {
581                 // Load the URL into the mainWebView and consume the event.
582                 loadUrlFromTextBox();
583
584                 // If the enter key was pressed, consume the event.
585                 return true;
586             } else {
587                 // If any other key was pressed, do not consume the event.
588                 return false;
589             }
590         });
591
592         // Set `waitingForOrbotHTMLString`.
593         waitingForOrbotHtmlString = "<html><body><br/><center><h1>" + getString(R.string.waiting_for_orbot) + "</h1></center></body></html>";
594
595         // Initialize `currentDomainName`, `orbotStatus`, and `waitingForOrbot`.
596         currentDomainName = "";
597         orbotStatus = "unknown";
598         waitingForOrbot = false;
599
600         // Create an Orbot status `BroadcastReceiver`.
601         orbotStatusBroadcastReceiver = new BroadcastReceiver() {
602             @Override
603             public void onReceive(Context context, Intent intent) {
604                 // Store the content of the status message in `orbotStatus`.
605                 orbotStatus = intent.getStringExtra("org.torproject.android.intent.extra.STATUS");
606
607                 // If Privacy Browser is waiting on Orbot, load the website now that Orbot is connected.
608                 if (orbotStatus.equals("ON") && waitingForOrbot) {
609                     // Reset `waitingForOrbot`.
610                     waitingForOrbot = false;
611
612                     // Load `formattedUrlString
613                     loadUrl(formattedUrlString);
614                 }
615             }
616         };
617
618         // Register `orbotStatusBroadcastReceiver` on `this` context.
619         this.registerReceiver(orbotStatusBroadcastReceiver, new IntentFilter("org.torproject.android.intent.action.STATUS"));
620
621         // Get handles for views that need to be accessed.
622         drawerLayout = findViewById(R.id.drawerlayout);
623         rootCoordinatorLayout = findViewById(R.id.root_coordinatorlayout);
624         bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
625         bookmarksTitleTextView = findViewById(R.id.bookmarks_title_textview);
626         FloatingActionButton launchBookmarksActivityFab = findViewById(R.id.launch_bookmarks_activity_fab);
627         FloatingActionButton createBookmarkFolderFab = findViewById(R.id.create_bookmark_folder_fab);
628         FloatingActionButton createBookmarkFab = findViewById(R.id.create_bookmark_fab);
629         mainWebViewRelativeLayout = findViewById(R.id.main_webview_relativelayout);
630         mainWebView = findViewById(R.id.main_webview);
631         findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
632         findOnPageEditText = findViewById(R.id.find_on_page_edittext);
633         fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
634         urlAppBarRelativeLayout = findViewById(R.id.url_app_bar_relativelayout);
635         favoriteIconImageView = findViewById(R.id.favorite_icon);
636
637         // 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.
638         if (darkTheme) {
639             launchBookmarksActivityFab.setImageDrawable(getResources().getDrawable(R.drawable.bookmarks_dark));
640             createBookmarkFolderFab.setImageDrawable(getResources().getDrawable(R.drawable.create_folder_dark));
641             createBookmarkFab.setImageDrawable(getResources().getDrawable(R.drawable.create_bookmark_dark));
642             bookmarksListView.setBackgroundColor(getResources().getColor(R.color.gray_850));
643         } else {
644             launchBookmarksActivityFab.setImageDrawable(getResources().getDrawable(R.drawable.bookmarks_light));
645             createBookmarkFolderFab.setImageDrawable(getResources().getDrawable(R.drawable.create_folder_light));
646             createBookmarkFab.setImageDrawable(getResources().getDrawable(R.drawable.create_bookmark_light));
647             bookmarksListView.setBackgroundColor(getResources().getColor(R.color.white));
648         }
649
650         // Set the launch bookmarks activity FAB to launch the bookmarks activity.
651         launchBookmarksActivityFab.setOnClickListener(v -> {
652             // Create an intent to launch the bookmarks activity.
653             Intent bookmarksIntent = new Intent(getApplicationContext(), BookmarksActivity.class);
654
655             // Include the current folder with the `Intent`.
656             bookmarksIntent.putExtra("Current Folder", currentBookmarksFolder);
657
658             // Make it so.
659             startActivity(bookmarksIntent);
660         });
661
662         // Set the create new bookmark folder FAB to display an alert dialog.
663         createBookmarkFolderFab.setOnClickListener(v -> {
664             // Show the `CreateBookmarkFolderDialog` `AlertDialog` and name the instance `@string/create_folder`.
665             AppCompatDialogFragment createBookmarkFolderDialog = new CreateBookmarkFolderDialog();
666             createBookmarkFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_folder));
667         });
668
669         // Set the create new bookmark FAB to display an alert dialog.
670         createBookmarkFab.setOnClickListener(view -> {
671             // Show the `CreateBookmarkDialog` `AlertDialog` and name the instance `@string/create_bookmark`.
672             AppCompatDialogFragment createBookmarkDialog = new CreateBookmarkDialog();
673             createBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_bookmark));
674         });
675
676         // Create a double-tap listener to toggle full-screen mode.
677         final GestureDetector gestureDetector = new GestureDetector(this, new GestureDetector.SimpleOnGestureListener() {
678             // Override `onDoubleTap()`.  All other events are handled using the default settings.
679             @Override
680             public boolean onDoubleTap(MotionEvent event) {
681                 if (fullScreenBrowsingModeEnabled) {  // Only process the double-tap if full screen browsing mode is enabled.
682                     // Toggle `inFullScreenBrowsingMode`.
683                     inFullScreenBrowsingMode = !inFullScreenBrowsingMode;
684
685                     if (inFullScreenBrowsingMode) {  // Switch to full screen mode.
686                         // Hide the `appBar`.
687                         appBar.hide();
688
689                         // Hide the banner ad in the free flavor.
690                         if (BuildConfig.FLAVOR.contentEquals("free")) {
691                             // The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
692                             AdHelper.hideAd(findViewById(R.id.adview));
693                         }
694
695                         // Modify the system bars.
696                         if (hideSystemBarsOnFullscreen) {  // Hide everything.
697                             // Remove the translucent overlays.
698                             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
699
700                             // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
701                             drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
702
703                             /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
704                              * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
705                              * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
706                              */
707                             rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
708
709                             // Set `rootCoordinatorLayout` to fill the whole screen.
710                             rootCoordinatorLayout.setFitsSystemWindows(false);
711                         } else {  // Hide everything except the status and navigation bars.
712                             // Set `rootCoordinatorLayout` to fit under the status and navigation bars.
713                             rootCoordinatorLayout.setFitsSystemWindows(false);
714
715                             // 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.
716                             if (translucentNavigationBarOnFullscreen) {
717                                 // Set the navigation bar to be translucent.
718                                 getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
719                             }
720                         }
721                     } else {  // Switch to normal viewing mode.
722                         // Show the `appBar`.
723                         appBar.show();
724
725                         // Show the `BannerAd` in the free flavor.
726                         if (BuildConfig.FLAVOR.contentEquals("free")) {
727                             // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
728                             AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
729                         }
730
731                         // Remove the translucent navigation bar flag if it is set.
732                         getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
733
734                         // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
735                         getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
736
737                         // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
738                         rootCoordinatorLayout.setSystemUiVisibility(0);
739
740                         // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
741                         rootCoordinatorLayout.setFitsSystemWindows(true);
742                     }
743
744                     // Consume the double-tap.
745                     return true;
746                 } else { // Do not consume the double-tap because full screen browsing mode is disabled.
747                     return false;
748                 }
749             }
750         });
751
752         // Pass all touch events on `mainWebView` through `gestureDetector` to check for double-taps.
753         mainWebView.setOnTouchListener((View v, MotionEvent event) -> {
754             // Call `performClick()` on the view, which is required for accessibility.
755             v.performClick();
756
757             // Send the `event` to `gestureDetector`.
758             return gestureDetector.onTouchEvent(event);
759         });
760
761         // Update `findOnPageCountTextView`.
762         mainWebView.setFindListener(new WebView.FindListener() {
763             // Get a handle for `findOnPageCountTextView`.
764             final TextView findOnPageCountTextView = (TextView) findViewById(R.id.find_on_page_count_textview);
765
766             @Override
767             public void onFindResultReceived(int activeMatchOrdinal, int numberOfMatches, boolean isDoneCounting) {
768                 if ((isDoneCounting) && (numberOfMatches == 0)) {  // There are no matches.
769                     // Set `findOnPageCountTextView` to `0/0`.
770                     findOnPageCountTextView.setText(R.string.zero_of_zero);
771                 } else if (isDoneCounting) {  // There are matches.
772                     // `activeMatchOrdinal` is zero-based.
773                     int activeMatch = activeMatchOrdinal + 1;
774
775                     // Build the match string.
776                     String matchString = activeMatch + "/" + numberOfMatches;
777
778                     // Set `findOnPageCountTextView`.
779                     findOnPageCountTextView.setText(matchString);
780                 }
781             }
782         });
783
784         // Search for the string on the page whenever a character changes in the `findOnPageEditText`.
785         findOnPageEditText.addTextChangedListener(new TextWatcher() {
786             @Override
787             public void beforeTextChanged(CharSequence s, int start, int count, int after) {
788                 // Do nothing.
789             }
790
791             @Override
792             public void onTextChanged(CharSequence s, int start, int before, int count) {
793                 // Do nothing.
794             }
795
796             @Override
797             public void afterTextChanged(Editable s) {
798                 // Search for the text in `mainWebView`.
799                 mainWebView.findAllAsync(findOnPageEditText.getText().toString());
800             }
801         });
802
803         // Set the `check mark` button for the `findOnPageEditText` keyboard to close the soft keyboard.
804         findOnPageEditText.setOnKeyListener((v, keyCode, event) -> {
805             if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {  // The `enter` key was pressed.
806                 // Hide the soft keyboard.  `0` indicates no additional flags.
807                 inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
808
809                 // Consume the event.
810                 return true;
811             } else {  // A different key was pressed.
812                 // Do not consume the event.
813                 return false;
814             }
815         });
816
817         // Implement swipe to refresh.
818         swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
819         swipeRefreshLayout.setOnRefreshListener(() -> mainWebView.reload());
820
821         // Set the swipe to refresh color according to the theme.
822         if (darkTheme) {
823             swipeRefreshLayout.setColorSchemeResources(R.color.blue_600);
824             swipeRefreshLayout.setProgressBackgroundColorSchemeResource(R.color.gray_850);
825         } else {
826             swipeRefreshLayout.setColorSchemeResources(R.color.blue_700);
827         }
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 and the WebView.  This removes any text selection markers and context menus, which otherwise draw above the open drawers.
932                     urlTextBox.clearFocus();
933                     mainWebView.clearFocus();
934                 }
935             }
936         });
937
938         // drawerToggle creates the hamburger icon at the start of the AppBar.
939         drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, supportAppBar, R.string.open_navigation_drawer, R.string.close_navigation_drawer);
940
941         // Get a handle for the progress bar.
942         final ProgressBar progressBar = findViewById(R.id.progress_bar);
943
944         mainWebView.setWebChromeClient(new WebChromeClient() {
945             // Update the progress bar when a page is loading.
946             @Override
947             public void onProgressChanged(WebView view, int progress) {
948                 // Inject the night mode CSS if night mode is enabled.
949                 if (nightMode) {
950                     // `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
951                     // used by WordPress.  `text-decoration: none` removes all text underlines.  `text-shadow: none` removes text shadows, which usually have a hard coded color.
952                     // `border: none` removes all borders, which can also be used to underline text.
953                     // `a {color: #1565C0}` sets links to be a dark blue.  `!important` takes precedent over any existing sub-settings.
954                     mainWebView.evaluateJavascript("(function() {var parent = document.getElementsByTagName('head').item(0); var style = document.createElement('style'); style.type = 'text/css'; " +
955                             "style.innerHTML = '* {background-color: #212121 !important; color: #BDBDBD !important; box-shadow: none !important; text-decoration: none !important;" +
956                             "text-shadow: none !important; border: none !important;} a {color: #1565C0 !important;}'; parent.appendChild(style)})()", value -> {
957                                 // Initialize a handler to display `mainWebView`.
958                                 Handler displayWebViewHandler = new Handler();
959
960                                 // Setup a runnable to display `mainWebView` after a delay to allow the CSS to be applied.
961                                 Runnable displayWebViewRunnable = () -> {
962                                     // Only display `mainWebView` if the progress bar is one.  This prevents the display of the `WebView` while it is still loading.
963                                     if (progressBar.getVisibility() == View.GONE) {
964                                         mainWebView.setVisibility(View.VISIBLE);
965                                     }
966                                 };
967
968                                 // Displaying of `mainWebView` after 500 milliseconds.
969                                 displayWebViewHandler.postDelayed(displayWebViewRunnable, 500);
970                             });
971                 }
972
973                 // Update the progress bar.
974                 progressBar.setProgress(progress);
975
976                 // Set the visibility of the progress bar.
977                 if (progress < 100) {
978                     // Show the progress bar.
979                     progressBar.setVisibility(View.VISIBLE);
980                 } else {
981                     // Hide the progress bar.
982                     progressBar.setVisibility(View.GONE);
983
984                     // Display `mainWebView` if night mode is disabled.
985                     // 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
986                     // currently enabled.
987                     if (!nightMode) {
988                         mainWebView.setVisibility(View.VISIBLE);
989                     }
990
991                     //Stop the swipe to refresh indicator if it is running
992                     swipeRefreshLayout.setRefreshing(false);
993                 }
994             }
995
996             // Set the favorite icon when it changes.
997             @Override
998             public void onReceivedIcon(WebView view, Bitmap icon) {
999                 // Only update the favorite icon if the website has finished loading.
1000                 if (progressBar.getVisibility() == View.GONE) {
1001                     // Save a copy of the favorite icon.
1002                     favoriteIconBitmap = icon;
1003
1004                     // Place the favorite icon in the appBar.
1005                     favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
1006                 }
1007             }
1008
1009             // Save a copy of the title when it changes.
1010             @Override
1011             public void onReceivedTitle(WebView view, String title) {
1012                 // Save a copy of the title.
1013                 webViewTitle = title;
1014             }
1015
1016             // Enter full screen video.
1017             @Override
1018             public void onShowCustomView(View view, CustomViewCallback callback) {
1019                 // Set the full screen video flag.
1020                 displayingFullScreenVideo = true;
1021
1022                 // Pause the ad if this is the free flavor.
1023                 if (BuildConfig.FLAVOR.contentEquals("free")) {
1024                     // The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
1025                     AdHelper.pauseAd(findViewById(R.id.adview));
1026                 }
1027
1028                 // Remove the translucent overlays.
1029                 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
1030
1031                 // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
1032                 drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
1033
1034                 /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
1035                  * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
1036                  * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
1037                  */
1038                 rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
1039
1040                 // Set `rootCoordinatorLayout` to fill the entire screen.
1041                 rootCoordinatorLayout.setFitsSystemWindows(false);
1042
1043                 // Disable the sliding drawers.
1044                 drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
1045
1046                 // Add `view` to `fullScreenVideoFrameLayout` and display it on the screen.
1047                 fullScreenVideoFrameLayout.addView(view);
1048                 fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
1049             }
1050
1051             // Exit full screen video.
1052             @Override
1053             public void onHideCustomView() {
1054                 // Unset the full screen video flag.
1055                 displayingFullScreenVideo = false;
1056
1057                 // Hide `fullScreenVideoFrameLayout`.
1058                 fullScreenVideoFrameLayout.removeAllViews();
1059                 fullScreenVideoFrameLayout.setVisibility(View.GONE);
1060
1061                 // Enable the sliding drawers.
1062                 drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
1063
1064                 // Apply the appropriate full screen mode the `SYSTEM_UI` flags.
1065                 if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
1066                     if (hideSystemBarsOnFullscreen) {  // Hide everything.
1067                         // Remove the translucent navigation setting if it is currently flagged.
1068                         getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
1069
1070                         // Remove the translucent status bar overlay.
1071                         getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
1072
1073                         // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
1074                         drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
1075
1076                         /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
1077                          * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
1078                          * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
1079                          */
1080                         rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
1081                     } else {  // Hide everything except the status and navigation bars.
1082                         // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
1083                         rootCoordinatorLayout.setSystemUiVisibility(0);
1084
1085                         // Add the translucent status flag if it is unset.
1086                         getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
1087
1088                         if (translucentNavigationBarOnFullscreen) {
1089                             // Set the navigation bar to be translucent.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
1090                             getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
1091                         } else {
1092                             // Set the navigation bar to be black.
1093                             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
1094                         }
1095                     }
1096                 } else {  // Switch to normal viewing mode.
1097                     // Show the `appBar` if `findOnPageLinearLayout` is not visible.
1098                     if (findOnPageLinearLayout.getVisibility() == View.GONE) {
1099                         appBar.show();
1100                     }
1101
1102                     // Show the `BannerAd` in the free flavor.
1103                     if (BuildConfig.FLAVOR.contentEquals("free")) {
1104                         // Initialize the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
1105                         AdHelper.initializeAds(findViewById(R.id.adview), getApplicationContext(), getFragmentManager(), getString(R.string.google_app_id), getString(R.string.ad_unit_id));
1106                     }
1107
1108                     // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
1109                     rootCoordinatorLayout.setSystemUiVisibility(0);
1110
1111                     // Remove the translucent navigation bar flag if it is set.
1112                     getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
1113
1114                     // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
1115                     getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
1116
1117                     // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
1118                     rootCoordinatorLayout.setFitsSystemWindows(true);
1119                 }
1120
1121                 // Show the ad if this is the free flavor.
1122                 if (BuildConfig.FLAVOR.contentEquals("free")) {
1123                     // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
1124                     AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
1125                 }
1126             }
1127
1128             // Upload files.
1129             @Override
1130             public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
1131                 // Show the file chooser if the device is running API >= 21.
1132                 if (Build.VERSION.SDK_INT >= 21) {
1133                     // Store the file path callback.
1134                     fileChooserCallback = filePathCallback;
1135
1136                     // Create an intent to open a chooser based ont the file chooser parameters.
1137                     Intent fileChooserIntent = fileChooserParams.createIntent();
1138
1139                     // Open the file chooser.  Currently only one `startActivityForResult` exists in this activity, so the request code, used to differentiate them, is simply `0`.
1140                     startActivityForResult(fileChooserIntent, 0);
1141                 }
1142                 return true;
1143             }
1144         });
1145
1146         // Register `mainWebView` for a context menu.  This is used to see link targets and download images.
1147         registerForContextMenu(mainWebView);
1148
1149         // Allow the downloading of files.
1150         mainWebView.setDownloadListener((String url, String userAgent, String contentDisposition, String mimetype, long contentLength) -> {
1151             // Check if the download should be processed by an external app.
1152             if (downloadWithExternalApp) {  // Download with an external app.
1153                 openUrlWithExternalApp(url);
1154             } else {  // Download with Android's download manager.
1155                 // Check to see if the WRITE_EXTERNAL_STORAGE permission has already been granted.
1156                 if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission has not been granted.
1157                     // The WRITE_EXTERNAL_STORAGE permission needs to be requested.
1158
1159                     // Store the variables for future use by `onRequestPermissionsResult()`.
1160                     downloadUrl = url;
1161                     downloadContentDisposition = contentDisposition;
1162                     downloadContentLength = contentLength;
1163
1164                     // Show a dialog if the user has previously denied the permission.
1165                     if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
1166                         // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_FILE.
1167                         DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_FILE);
1168
1169                         // Show the download location permission alert dialog.  The permission will be requested when the the dialog is closed.
1170                         downloadLocationPermissionDialogFragment.show(getFragmentManager(), getString(R.string.download_location));
1171                     } else {  // Show the permission request directly.
1172                         // Request the permission.  The download dialog will be launched by `onRequestPermissionResult()`.
1173                         ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
1174                     }
1175                 } else {  // The storage permission has already been granted.
1176                     // Get a handle for the download file alert dialog.
1177                     AppCompatDialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(url, contentDisposition, contentLength);
1178
1179                     // Show the download file alert dialog.
1180                     downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
1181                 }
1182             }
1183         });
1184
1185         // Allow pinch to zoom.
1186         mainWebView.getSettings().setBuiltInZoomControls(true);
1187
1188         // Hide zoom controls.
1189         mainWebView.getSettings().setDisplayZoomControls(false);
1190
1191         // Set `mainWebView` to use a wide viewport.  Otherwise, some web pages will be scrunched and some content will render outside the screen.
1192         mainWebView.getSettings().setUseWideViewPort(true);
1193
1194         // Set `mainWebView` to load in overview mode (zoomed out to the maximum width).
1195         mainWebView.getSettings().setLoadWithOverviewMode(true);
1196
1197         // Explicitly disable geolocation.
1198         mainWebView.getSettings().setGeolocationEnabled(false);
1199
1200         // Initialize cookieManager.
1201         cookieManager = CookieManager.getInstance();
1202
1203         // 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).
1204         customHeaders.put("X-Requested-With", "");
1205
1206         // Initialize the default preference values the first time the program is run.  `false` keeps this command from resetting any current preferences back to default.
1207         PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
1208
1209         // Get a handle for the `Runtime`.
1210         privacyBrowserRuntime = Runtime.getRuntime();
1211
1212         // Store the application's private data directory.
1213         privateDataDirectoryString = getApplicationInfo().dataDir;
1214         // `dataDir` will vary, but will be something like `/data/user/0/com.stoutner.privacybrowser.standard`, which links to `/data/data/com.stoutner.privacybrowser.standard`.
1215
1216         // Initialize `inFullScreenBrowsingMode`, which is always false at this point because Privacy Browser never starts in full screen browsing mode.
1217         inFullScreenBrowsingMode = false;
1218
1219         // Initialize the privacy settings variables.
1220         javaScriptEnabled = false;
1221         firstPartyCookiesEnabled = false;
1222         thirdPartyCookiesEnabled = false;
1223         domStorageEnabled = false;
1224         saveFormDataEnabled = false;  // Form data can be removed once the minimum API >= 26.
1225         nightMode = false;
1226
1227         // Store the default user agent.
1228         webViewDefaultUserAgent = mainWebView.getSettings().getUserAgentString();
1229
1230         // Initialize the WebView title.
1231         webViewTitle = getString(R.string.no_title);
1232
1233         // Initialize the favorite icon bitmap.  `ContextCompat` must be used until API >= 21.
1234         Drawable favoriteIconDrawable = ContextCompat.getDrawable(getApplicationContext(), R.drawable.world);
1235         BitmapDrawable favoriteIconBitmapDrawable = (BitmapDrawable) favoriteIconDrawable;
1236         assert favoriteIconBitmapDrawable != null;
1237         favoriteIconDefaultBitmap = favoriteIconBitmapDrawable.getBitmap();
1238
1239         // If the favorite icon is null, load the default.
1240         if (favoriteIconBitmap == null) {
1241             favoriteIconBitmap = favoriteIconDefaultBitmap;
1242         }
1243
1244         // Initialize the user agent array adapter and string array.
1245         userAgentNamesArray = ArrayAdapter.createFromResource(this, R.array.user_agent_names, R.layout.spinner_item);
1246         userAgentDataArray = getResources().getStringArray(R.array.user_agent_data);
1247
1248         // Apply the app settings from the shared preferences.
1249         applyAppSettings();
1250
1251         // Instantiate the block list helper.
1252         BlockListHelper blockListHelper = new BlockListHelper();
1253
1254         // Initialize the list of resource requests.
1255         resourceRequests = new ArrayList<>();
1256
1257         // Parse the block lists.
1258         final ArrayList<List<String[]>> easyList = blockListHelper.parseBlockList(getAssets(), "blocklists/easylist.txt");
1259         final ArrayList<List<String[]>> easyPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/easyprivacy.txt");
1260         final ArrayList<List<String[]>> fanboysAnnoyanceList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-annoyance.txt");
1261         final ArrayList<List<String[]>> fanboysSocialList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-social.txt");
1262         final ArrayList<List<String[]>> ultraPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/ultraprivacy.txt");
1263
1264         // Store the list versions.
1265         easyListVersion = easyList.get(0).get(0)[0];
1266         easyPrivacyVersion = easyPrivacy.get(0).get(0)[0];
1267         fanboysAnnoyanceVersion = fanboysAnnoyanceList.get(0).get(0)[0];
1268         fanboysSocialVersion = fanboysSocialList.get(0).get(0)[0];
1269         ultraPrivacyVersion = ultraPrivacy.get(0).get(0)[0];
1270
1271         // Get a handle for the activity.  This is used to update the requests counter while the navigation menu is open.
1272         Activity activity = this;
1273
1274         mainWebView.setWebViewClient(new WebViewClient() {
1275             // `shouldOverrideUrlLoading` makes this `WebView` the default handler for URLs inside the app, so that links are not kicked out to other apps.
1276             // The deprecated `shouldOverrideUrlLoading` must be used until API >= 24.
1277             @SuppressWarnings("deprecation")
1278             @Override
1279             public boolean shouldOverrideUrlLoading(WebView view, String url) {
1280                 if (url.startsWith("http")) {  // Load the URL in Privacy Browser.
1281                     // Reset the formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
1282                     formattedUrlString = "";
1283
1284                     // Apply the domain settings for the new URL.  `applyDomainSettings` doesn't do anything if the domain has not changed.
1285                     boolean userAgentChanged = applyDomainSettings(url, true, false);
1286
1287                     // Check if the user agent has changed.
1288                     if (userAgentChanged) {
1289                         // Manually load the URL.  The changing of the user agent will cause WebView to reload the previous URL.
1290                         mainWebView.loadUrl(url, customHeaders);
1291
1292                         // Returning true indicates that Privacy Browser is manually handling the loading of the URL.
1293                         return true;
1294                     } else {
1295                         // Returning false causes the current WebView to handle the URL and prevents it from adding redirects to the history list.
1296                         return false;
1297                     }
1298                 } else if (url.startsWith("mailto:")) {  // Load the email address in an external email program.
1299                     // Use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
1300                     Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
1301
1302                     // Parse the url and set it as the data for the intent.
1303                     emailIntent.setData(Uri.parse(url));
1304
1305                     // Open the email program in a new task instead of as part of Privacy Browser.
1306                     emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1307
1308                     // Make it so.
1309                     startActivity(emailIntent);
1310
1311                     // Returning true indicates Privacy Browser is handling the URL by creating an intent.
1312                     return true;
1313                 } else if (url.startsWith("tel:")) {  // Load the phone number in the dialer.
1314                     // Open the dialer and load the phone number, but wait for the user to place the call.
1315                     Intent dialIntent = new Intent(Intent.ACTION_DIAL);
1316
1317                     // Add the phone number to the intent.
1318                     dialIntent.setData(Uri.parse(url));
1319
1320                     // Open the dialer in a new task instead of as part of Privacy Browser.
1321                     dialIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1322
1323                     // Make it so.
1324                     startActivity(dialIntent);
1325
1326                     // Returning true indicates Privacy Browser is handling the URL by creating an intent.
1327                     return true;
1328                 } else {  // Load a system chooser to select an app that can handle the URL.
1329                     // Open an app that can handle the URL.
1330                     Intent genericIntent = new Intent(Intent.ACTION_VIEW);
1331
1332                     // Add the URL to the intent.
1333                     genericIntent.setData(Uri.parse(url));
1334
1335                     // List all apps that can handle the URL instead of just opening the first one.
1336                     genericIntent.addCategory(Intent.CATEGORY_BROWSABLE);
1337
1338                     // Open the app in a new task instead of as part of Privacy Browser.
1339                     genericIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1340
1341                     // Start the app or display a snackbar if no app is available to handle the URL.
1342                     try {
1343                         startActivity(genericIntent);
1344                     } catch (ActivityNotFoundException exception) {
1345                         Snackbar.make(mainWebView, getString(R.string.unrecognized_url) + "  " + url, Snackbar.LENGTH_SHORT).show();
1346                     }
1347
1348                     // Returning true indicates Privacy Browser is handling the URL by creating an intent.
1349                     return true;
1350                 }
1351             }
1352
1353             // Check requests against the block lists.  The deprecated `shouldInterceptRequest()` must be used until minimum API >= 21.
1354             @SuppressWarnings("deprecation")
1355             @Override
1356             public WebResourceResponse shouldInterceptRequest(WebView view, String url){
1357                 // Create an empty web resource response to be used if the resource request is blocked.
1358                 WebResourceResponse emptyWebResourceResponse = new WebResourceResponse("text/plain", "utf8", new ByteArrayInputStream("".getBytes()));
1359
1360                 // Reset the whitelist results tracker.
1361                 whiteListResultStringArray = null;
1362
1363                 // Initialize the third party request tracker.
1364                 boolean isThirdPartyRequest = false;
1365
1366                 // Initialize the current domain string.
1367                 String currentDomain = "";
1368
1369                 // Nobody is happy when comparing null strings.
1370                 if (!(formattedUrlString == null) && !(url == null)) {
1371                     // Get the domain strings to URIs.
1372                     Uri currentDomainUri = Uri.parse(formattedUrlString);
1373                     Uri requestDomainUri = Uri.parse(url);
1374
1375                     // Get the domain host names.
1376                     String currentBaseDomain = currentDomainUri.getHost();
1377                     String requestBaseDomain = requestDomainUri.getHost();
1378
1379                     // Update the current domain variable.
1380                     currentDomain = currentBaseDomain;
1381
1382                     // Only compare the current base domain and the request base domain if neither is null.
1383                     if (!(currentBaseDomain == null) && !(requestBaseDomain == null)) {
1384                         // Determine the current base domain.
1385                         while (currentBaseDomain.indexOf(".", currentBaseDomain.indexOf(".") + 1) > 0) {  // There is at least one subdomain.
1386                             // Remove the first subdomain.
1387                             currentBaseDomain = currentBaseDomain.substring(currentBaseDomain.indexOf(".") + 1);
1388                         }
1389
1390                         // Determine the request base domain.
1391                         while (requestBaseDomain.indexOf(".", requestBaseDomain.indexOf(".") + 1) > 0) {  // There is at least one subdomain.
1392                             // Remove the first subdomain.
1393                             requestBaseDomain = requestBaseDomain.substring(requestBaseDomain.indexOf(".") + 1);
1394                         }
1395
1396                         // Update the third party request tracker.
1397                         isThirdPartyRequest = !currentBaseDomain.equals(requestBaseDomain);
1398                     }
1399                 }
1400
1401                 // Block third-party requests if enabled.
1402                 if (isThirdPartyRequest && blockAllThirdPartyRequests) {
1403                     // Increment the blocked requests counters.
1404                     blockedRequests++;
1405                     thirdPartyBlockedRequests++;
1406
1407                     // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1408                     activity.runOnUiThread(() -> {
1409                         navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1410                         blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1411                         blockAllThirdPartyRequestsMenuItem.setTitle(thirdPartyBlockedRequests + " - " + getString(R.string.block_all_third_party_requests));
1412                     });
1413
1414                     // Add the request to the log.
1415                     resourceRequests.add(new String[]{String.valueOf(REQUEST_THIRD_PARTY), url});
1416
1417                     // Return an empty web resource response.
1418                     return emptyWebResourceResponse;
1419                 }
1420
1421                 // Check UltraPrivacy if it is enabled.
1422                 if (ultraPrivacyEnabled) {
1423                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, ultraPrivacy)) {
1424                         // Increment the blocked requests counters.
1425                         blockedRequests++;
1426                         ultraPrivacyBlockedRequests++;
1427
1428                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1429                         activity.runOnUiThread(() -> {
1430                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1431                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1432                             ultraPrivacyMenuItem.setTitle(ultraPrivacyBlockedRequests + " - " + getString(R.string.ultraprivacy));
1433                         });
1434
1435                         // The resource request was blocked.  Return an empty web resource response.
1436                         return emptyWebResourceResponse;
1437                     }
1438
1439                     // If the whitelist result is not null, the request has been allowed by UltraPrivacy.
1440                     if (whiteListResultStringArray != null) {
1441                         // Add a whitelist entry to the resource requests array.
1442                         resourceRequests.add(whiteListResultStringArray);
1443
1444                         // The resource request has been allowed by UltraPrivacy.  `return null` loads the requested resource.
1445                         return null;
1446                     }
1447                 }
1448
1449                 // Check EasyList if it is enabled.
1450                 if (easyListEnabled) {
1451                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, easyList)) {
1452                         // Increment the blocked requests counters.
1453                         blockedRequests++;
1454                         easyListBlockedRequests++;
1455
1456                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1457                         activity.runOnUiThread(() -> {
1458                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1459                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1460                             easyListMenuItem.setTitle(easyListBlockedRequests + " - " + getString(R.string.easylist));
1461                         });
1462
1463                         // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
1464                         whiteListResultStringArray = null;
1465
1466                         // The resource request was blocked.  Return an empty web resource response.
1467                         return emptyWebResourceResponse;
1468                     }
1469                 }
1470
1471                 // Check EasyPrivacy if it is enabled.
1472                 if (easyPrivacyEnabled) {
1473                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, easyPrivacy)) {
1474                         // Increment the blocked requests counters.
1475                         blockedRequests++;
1476                         easyPrivacyBlockedRequests++;
1477
1478                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1479                         activity.runOnUiThread(() -> {
1480                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1481                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1482                             easyPrivacyMenuItem.setTitle(easyPrivacyBlockedRequests + " - " + getString(R.string.easyprivacy));
1483                         });
1484
1485                         // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
1486                         whiteListResultStringArray = null;
1487
1488                         // The resource request was blocked.  Return an empty web resource response.
1489                         return emptyWebResourceResponse;
1490                     }
1491                 }
1492
1493                 // Check Fanboy’s Annoyance List if it is enabled.
1494                 if (fanboysAnnoyanceListEnabled) {
1495                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, fanboysAnnoyanceList)) {
1496                         // Increment the blocked requests counters.
1497                         blockedRequests++;
1498                         fanboysAnnoyanceListBlockedRequests++;
1499
1500                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1501                         activity.runOnUiThread(() -> {
1502                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1503                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1504                             fanboysAnnoyanceListMenuItem.setTitle(fanboysAnnoyanceListBlockedRequests + " - " + getString(R.string.fanboys_annoyance_list));
1505                         });
1506
1507                         // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
1508                         whiteListResultStringArray = null;
1509
1510                         // The resource request was blocked.  Return an empty web resource response.
1511                         return emptyWebResourceResponse;
1512                     }
1513                 } else if (fanboysSocialBlockingListEnabled){  // Only check Fanboy’s Social Blocking List if Fanboy’s Annoyance List is disabled.
1514                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, fanboysSocialList)) {
1515                         // Increment the blocked requests counters.
1516                         blockedRequests++;
1517                         fanboysSocialBlockingListBlockedRequests++;
1518
1519                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1520                         activity.runOnUiThread(() -> {
1521                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1522                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1523                             fanboysSocialBlockingListMenuItem.setTitle(fanboysSocialBlockingListBlockedRequests + " - " + getString(R.string.fanboys_social_blocking_list));
1524                         });
1525
1526                         // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
1527                         whiteListResultStringArray = null;
1528
1529                         // The resource request was blocked.  Return an empty web resource response.
1530                         return emptyWebResourceResponse;
1531                     }
1532                 }
1533
1534                 // Add the request to the log because it hasn't been processed by any of the previous checks.
1535                 if (whiteListResultStringArray != null ) {  // The request was processed by a whitelist.
1536                     resourceRequests.add(whiteListResultStringArray);
1537                 } else {  // The request didn't match any blocklist entry.  Log it as a default request.
1538                     resourceRequests.add(new String[]{String.valueOf(REQUEST_DEFAULT), url});
1539                 }
1540
1541                 // The resource request has not been blocked.  `return null` loads the requested resource.
1542                 return null;
1543             }
1544
1545             // Handle HTTP authentication requests.
1546             @Override
1547             public void onReceivedHttpAuthRequest(WebView view, HttpAuthHandler handler, String host, String realm) {
1548                 // Store `handler` so it can be accessed from `onHttpAuthenticationCancel()` and `onHttpAuthenticationProceed()`.
1549                 httpAuthHandler = handler;
1550
1551                 // Display the HTTP authentication dialog.
1552                 AppCompatDialogFragment httpAuthenticationDialogFragment = HttpAuthenticationDialog.displayDialog(host, realm);
1553                 httpAuthenticationDialogFragment.show(getSupportFragmentManager(), getString(R.string.http_authentication));
1554             }
1555
1556             // Update the URL in urlTextBox when the page starts to load.
1557             @Override
1558             public void onPageStarted(WebView view, String url, Bitmap favicon) {
1559                 // Reset the list of resource requests.
1560                 resourceRequests.clear();
1561
1562                 // Initialize the counters for requests blocked by each blocklist.
1563                 blockedRequests = 0;
1564                 easyListBlockedRequests = 0;
1565                 easyPrivacyBlockedRequests = 0;
1566                 fanboysAnnoyanceListBlockedRequests = 0;
1567                 fanboysSocialBlockingListBlockedRequests = 0;
1568                 ultraPrivacyBlockedRequests = 0;
1569                 thirdPartyBlockedRequests = 0;
1570
1571                 // If night mode is enabled, hide `mainWebView` until after the night mode CSS is applied.
1572                 if (nightMode) {
1573                     mainWebView.setVisibility(View.INVISIBLE);
1574                 }
1575
1576                 // Hide the keyboard.  `0` indicates no additional flags.
1577                 inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
1578
1579                 // Check to see if Privacy Browser is waiting on Orbot.
1580                 if (!waitingForOrbot) {  // We are not waiting on Orbot, so we need to process the URL.
1581                     // 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.
1582                     formattedUrlString = url;
1583
1584                     // Display the formatted URL text.
1585                     urlTextBox.setText(formattedUrlString);
1586
1587                     // Apply text highlighting to `urlTextBox`.
1588                     highlightUrlText();
1589
1590                     // Apply any custom domain settings if the URL was loaded by navigating history.
1591                     if (navigatingHistory) {
1592                         // Apply the domain settings.
1593                         boolean userAgentChanged = applyDomainSettings(url, true, false);
1594
1595                         // Reset `navigatingHistory`.
1596                         navigatingHistory = false;
1597
1598                         // Manually load the URL if the user agent has changed, which will have caused the previous URL to be reloaded.
1599                         if (userAgentChanged) {
1600                             loadUrl(formattedUrlString);
1601                         }
1602                     }
1603
1604                     // 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.
1605                     urlIsLoading = true;
1606
1607                     // Replace Refresh with Stop if the menu item has been created.  (The WebView typically begins loading before the menu items are instantiated.)
1608                     if (refreshMenuItem != null) {
1609                         // Set the title.
1610                         refreshMenuItem.setTitle(R.string.stop);
1611
1612                         // If the icon is displayed in the AppBar, set it according to the theme.
1613                         if (displayAdditionalAppBarIcons) {
1614                             if (darkTheme) {
1615                                 refreshMenuItem.setIcon(R.drawable.close_dark);
1616                             } else {
1617                                 refreshMenuItem.setIcon(R.drawable.close_light);
1618                             }
1619                         }
1620                     }
1621                 }
1622             }
1623
1624             // It is necessary to update `formattedUrlString` and `urlTextBox` after the page finishes loading because the final URL can change during load.
1625             @Override
1626             public void onPageFinished(WebView view, String url) {
1627                 // Reset the wide view port if it has been turned off by the waiting for Orbot message.
1628                 if (!waitingForOrbot) {
1629                     mainWebView.getSettings().setUseWideViewPort(true);
1630                 }
1631
1632                 // Flush any cookies to persistent storage.  `CookieManager` has become very lazy about flushing cookies in recent versions.
1633                 if (firstPartyCookiesEnabled && Build.VERSION.SDK_INT >= 21) {
1634                     cookieManager.flush();
1635                 }
1636
1637                 // Update the Refresh menu item if it has been created.
1638                 if (refreshMenuItem != null) {
1639                     // Reset the Refresh title.
1640                     refreshMenuItem.setTitle(R.string.refresh);
1641
1642                     // If the icon is displayed in the AppBar, reset it according to the theme.
1643                     if (displayAdditionalAppBarIcons) {
1644                         if (darkTheme) {
1645                             refreshMenuItem.setIcon(R.drawable.refresh_enabled_dark);
1646                         } else {
1647                             refreshMenuItem.setIcon(R.drawable.refresh_enabled_light);
1648                         }
1649                     }
1650                 }
1651
1652                 // Reset `urlIsLoading`, which is used to prevent reloads on redirect if the user agent changes.
1653                 urlIsLoading = false;
1654
1655                 // Clear the cache and history if Incognito Mode is enabled.
1656                 if (incognitoModeEnabled) {
1657                     // Clear the cache.  `true` includes disk files.
1658                     mainWebView.clearCache(true);
1659
1660                     // Clear the back/forward history.
1661                     mainWebView.clearHistory();
1662
1663                     // Manually delete cache folders.
1664                     try {
1665                         // Delete the main cache directory.
1666                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
1667
1668                         // Delete the secondary `Service Worker` cache directory.
1669                         // A `String[]` must be used because the directory contains a space and `Runtime.exec` will not escape the string correctly otherwise.
1670                         privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
1671                     } catch (IOException e) {
1672                         // Do nothing if an error is thrown.
1673                     }
1674                 }
1675
1676                 // Update `urlTextBox` and apply domain settings if not waiting on Orbot.
1677                 if (!waitingForOrbot) {
1678                     // Check to see if `WebView` has set `url` to be `about:blank`.
1679                     if (url.equals("about:blank")) {  // `WebView` is blank, so `formattedUrlString` should be `""` and `urlTextBox` should display a hint.
1680                         // Set `formattedUrlString` to `""`.
1681                         formattedUrlString = "";
1682
1683                         urlTextBox.setText(formattedUrlString);
1684
1685                         // Request focus for `urlTextBox`.
1686                         urlTextBox.requestFocus();
1687
1688                         // Display the keyboard.
1689                         inputMethodManager.showSoftInput(urlTextBox, 0);
1690
1691                         // Apply the domain settings.  This clears any settings from the previous domain.
1692                         applyDomainSettings(formattedUrlString, true, false);
1693                     } else {  // `WebView` has loaded a webpage.
1694                         // Set `formattedUrlString`.
1695                         formattedUrlString = url;
1696
1697                         // Only update `urlTextBox` if the user is not typing in it.
1698                         if (!urlTextBox.hasFocus()) {
1699                             // Display the formatted URL text.
1700                             urlTextBox.setText(formattedUrlString);
1701
1702                             // Apply text highlighting to `urlTextBox`.
1703                             highlightUrlText();
1704                         }
1705                     }
1706
1707                     // Store the SSL certificate so it can be accessed from `ViewSslCertificateDialog` and `PinnedSslCertificateMismatchDialog`.
1708                     sslCertificate = mainWebView.getCertificate();
1709
1710                     // 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.
1711                     // Also ignore if changes in the user agent causes an error while navigating history.
1712                     if (pinnedDomainSslCertificate && !ignorePinnedSslCertificate && navigatingHistory) {
1713                         // Initialize the current SSL certificate variables.
1714                         String currentWebsiteIssuedToCName = "";
1715                         String currentWebsiteIssuedToOName = "";
1716                         String currentWebsiteIssuedToUName = "";
1717                         String currentWebsiteIssuedByCName = "";
1718                         String currentWebsiteIssuedByOName = "";
1719                         String currentWebsiteIssuedByUName = "";
1720                         Date currentWebsiteSslStartDate = null;
1721                         Date currentWebsiteSslEndDate = null;
1722
1723
1724                         // Extract the individual pieces of information from the current website SSL certificate if it is not null.
1725                         if (sslCertificate != null) {
1726                             currentWebsiteIssuedToCName = sslCertificate.getIssuedTo().getCName();
1727                             currentWebsiteIssuedToOName = sslCertificate.getIssuedTo().getOName();
1728                             currentWebsiteIssuedToUName = sslCertificate.getIssuedTo().getUName();
1729                             currentWebsiteIssuedByCName = sslCertificate.getIssuedBy().getCName();
1730                             currentWebsiteIssuedByOName = sslCertificate.getIssuedBy().getOName();
1731                             currentWebsiteIssuedByUName = sslCertificate.getIssuedBy().getUName();
1732                             currentWebsiteSslStartDate = sslCertificate.getValidNotBeforeDate();
1733                             currentWebsiteSslEndDate = sslCertificate.getValidNotAfterDate();
1734                         }
1735
1736                         // 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`.
1737                         String currentWebsiteSslStartDateString = "";
1738                         String currentWebsiteSslEndDateString = "";
1739                         String pinnedDomainSslStartDateString = "";
1740                         String pinnedDomainSslEndDateString = "";
1741
1742                         // Convert the `Dates` to `Strings` if they are not `null`.
1743                         if (currentWebsiteSslStartDate != null) {
1744                             currentWebsiteSslStartDateString = currentWebsiteSslStartDate.toString();
1745                         }
1746
1747                         if (currentWebsiteSslEndDate != null) {
1748                             currentWebsiteSslEndDateString = currentWebsiteSslEndDate.toString();
1749                         }
1750
1751                         if (pinnedDomainSslStartDate != null) {
1752                             pinnedDomainSslStartDateString = pinnedDomainSslStartDate.toString();
1753                         }
1754
1755                         if (pinnedDomainSslEndDate != null) {
1756                             pinnedDomainSslEndDateString = pinnedDomainSslEndDate.toString();
1757                         }
1758
1759                         // Check to see if the pinned SSL certificate matches the current website certificate.
1760                         if (!currentWebsiteIssuedToCName.equals(pinnedDomainSslIssuedToCNameString) || !currentWebsiteIssuedToOName.equals(pinnedDomainSslIssuedToONameString) ||
1761                                 !currentWebsiteIssuedToUName.equals(pinnedDomainSslIssuedToUNameString) || !currentWebsiteIssuedByCName.equals(pinnedDomainSslIssuedByCNameString) ||
1762                                 !currentWebsiteIssuedByOName.equals(pinnedDomainSslIssuedByONameString) || !currentWebsiteIssuedByUName.equals(pinnedDomainSslIssuedByUNameString) ||
1763                                 !currentWebsiteSslStartDateString.equals(pinnedDomainSslStartDateString) || !currentWebsiteSslEndDateString.equals(pinnedDomainSslEndDateString)) {
1764                             // The pinned SSL certificate doesn't match the current domain certificate.
1765                             //Display the pinned SSL certificate mismatch `AlertDialog`.
1766                             AppCompatDialogFragment pinnedSslCertificateMismatchDialogFragment = new PinnedSslCertificateMismatchDialog();
1767                             pinnedSslCertificateMismatchDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_mismatch));
1768                         }
1769                     }
1770                 }
1771             }
1772
1773             // Handle SSL Certificate errors.
1774             @Override
1775             public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
1776                 // Get the current website SSL certificate.
1777                 SslCertificate currentWebsiteSslCertificate = error.getCertificate();
1778
1779                 // Extract the individual pieces of information from the current website SSL certificate.
1780                 String currentWebsiteIssuedToCName = currentWebsiteSslCertificate.getIssuedTo().getCName();
1781                 String currentWebsiteIssuedToOName = currentWebsiteSslCertificate.getIssuedTo().getOName();
1782                 String currentWebsiteIssuedToUName = currentWebsiteSslCertificate.getIssuedTo().getUName();
1783                 String currentWebsiteIssuedByCName = currentWebsiteSslCertificate.getIssuedBy().getCName();
1784                 String currentWebsiteIssuedByOName = currentWebsiteSslCertificate.getIssuedBy().getOName();
1785                 String currentWebsiteIssuedByUName = currentWebsiteSslCertificate.getIssuedBy().getUName();
1786                 Date currentWebsiteSslStartDate = currentWebsiteSslCertificate.getValidNotBeforeDate();
1787                 Date currentWebsiteSslEndDate = currentWebsiteSslCertificate.getValidNotAfterDate();
1788
1789                 // Proceed to the website if the current SSL website certificate matches the pinned domain certificate.
1790                 if (pinnedDomainSslCertificate &&
1791                         currentWebsiteIssuedToCName.equals(pinnedDomainSslIssuedToCNameString) && currentWebsiteIssuedToOName.equals(pinnedDomainSslIssuedToONameString) &&
1792                         currentWebsiteIssuedToUName.equals(pinnedDomainSslIssuedToUNameString) && currentWebsiteIssuedByCName.equals(pinnedDomainSslIssuedByCNameString) &&
1793                         currentWebsiteIssuedByOName.equals(pinnedDomainSslIssuedByONameString) && currentWebsiteIssuedByUName.equals(pinnedDomainSslIssuedByUNameString) &&
1794                         currentWebsiteSslStartDate.equals(pinnedDomainSslStartDate) && currentWebsiteSslEndDate.equals(pinnedDomainSslEndDate)) {
1795                     // An SSL certificate is pinned and matches the current domain certificate.
1796                     // Proceed to the website without displaying an error.
1797                     handler.proceed();
1798                 } else {  // Either there isn't a pinned SSL certificate or it doesn't match the current website certificate.
1799                     // Store `handler` so it can be accesses from `onSslErrorCancel()` and `onSslErrorProceed()`.
1800                     sslErrorHandler = handler;
1801
1802                     // Display the SSL error `AlertDialog`.
1803                     AppCompatDialogFragment sslCertificateErrorDialogFragment = SslCertificateErrorDialog.displayDialog(error);
1804                     sslCertificateErrorDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_error));
1805                 }
1806             }
1807         });
1808
1809         // Get the intent that started the app.
1810         Intent launchingIntent = getIntent();
1811
1812         // Get the information from the intent.
1813         String launchingIntentAction = launchingIntent.getAction();
1814         Uri launchingIntentUriData = launchingIntent.getData();
1815
1816         // If the intent action is a web search, perform the search.
1817         if ((launchingIntentAction != null) && launchingIntentAction.equals(Intent.ACTION_WEB_SEARCH)) {
1818             // Create an encoded URL string.
1819             String encodedUrlString;
1820
1821             Log.i("Intent", launchingIntent.getStringExtra(SearchManager.QUERY));
1822
1823             // Sanitize the search input and convert it to a search.
1824             try {
1825                 encodedUrlString = URLEncoder.encode(launchingIntent.getStringExtra(SearchManager.QUERY), "UTF-8");
1826             } catch (UnsupportedEncodingException exception) {
1827                 encodedUrlString = "";
1828             }
1829
1830             // Add the base search URL.
1831             formattedUrlString = searchURL + encodedUrlString;
1832         } else if (launchingIntentUriData != null){  // Check to see if the intent contains a new URL.
1833             // Set the formatted URL string.
1834             formattedUrlString = launchingIntentUriData.toString();
1835         }
1836
1837         // Load the website if not waiting for Orbot to connect.
1838         if (!waitingForOrbot) {
1839             loadUrl(formattedUrlString);
1840         }
1841     }
1842
1843     @Override
1844     protected void onNewIntent(Intent intent) {
1845         // Sets the new intent as the activity intent, so that any future `getIntent()`s pick up this one instead of creating a new activity.
1846         setIntent(intent);
1847
1848         Log.i("Intent", intent.getAction());
1849
1850         // Get the information from the intent.
1851         String intentAction = intent.getAction();
1852         Uri intentUriData = intent.getData();
1853
1854         // If the intent action is a web search, perform the search.
1855         if ((intentAction != null) && intentAction.equals(Intent.ACTION_WEB_SEARCH)) {
1856             // Create an encoded URL string.
1857             String encodedUrlString;
1858
1859             // Sanitize the search input and convert it to a search.
1860             try {
1861                 encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
1862             } catch (UnsupportedEncodingException exception) {
1863                 encodedUrlString = "";
1864             }
1865
1866             // Add the base search URL.
1867             formattedUrlString = searchURL + encodedUrlString;
1868         } else if (intentUriData != null){  // Check to see if the intent contains a new URL.
1869             // Set the formatted URL string.
1870             formattedUrlString = intentUriData.toString();
1871         }
1872
1873         // Load the URL.
1874         loadUrl(formattedUrlString);
1875
1876         // Close the navigation drawer if it is open.
1877         if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
1878             drawerLayout.closeDrawer(GravityCompat.START);
1879         }
1880
1881         // Close the bookmarks drawer if it is open.
1882         if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
1883             drawerLayout.closeDrawer(GravityCompat.END);
1884         }
1885
1886         // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
1887         mainWebView.requestFocus();
1888     }
1889
1890     @Override
1891     public void onRestart() {
1892         // Run the default commands.
1893         super.onRestart();
1894
1895         // Make sure Orbot is running if Privacy Browser is proxying through Orbot.
1896         if (proxyThroughOrbot) {
1897             // Request Orbot to start.  If Orbot is already running no hard will be caused by this request.
1898             Intent orbotIntent = new Intent("org.torproject.android.intent.action.START");
1899
1900             // Send the intent to the Orbot package.
1901             orbotIntent.setPackage("org.torproject.android");
1902
1903             // Make it so.
1904             sendBroadcast(orbotIntent);
1905         }
1906
1907         // Apply the app settings if returning from the Settings activity..
1908         if (reapplyAppSettingsOnRestart) {
1909             // Apply the app settings.
1910             applyAppSettings();
1911
1912             // Reload the webpage if displaying of images has been disabled in the Settings activity.
1913             if (reloadOnRestart) {
1914                 // Reload `mainWebView`.
1915                 mainWebView.reload();
1916
1917                 // Reset `reloadOnRestartBoolean`.
1918                 reloadOnRestart = false;
1919             }
1920
1921             // Reset the return from settings flag.
1922             reapplyAppSettingsOnRestart = false;
1923         }
1924
1925         // Apply the domain settings if returning from the Domains activity.
1926         if (reapplyDomainSettingsOnRestart) {
1927             // Reapply the domain settings.
1928             applyDomainSettings(formattedUrlString, false, true);
1929
1930             // Reset `reapplyDomainSettingsOnRestart`.
1931             reapplyDomainSettingsOnRestart = false;
1932         }
1933
1934         // Load the URL on restart to apply changes to night mode.
1935         if (loadUrlOnRestart) {
1936             // Load the current `formattedUrlString`.
1937             loadUrl(formattedUrlString);
1938
1939             // Reset `loadUrlOnRestart.
1940             loadUrlOnRestart = false;
1941         }
1942
1943         // Update the bookmarks drawer if returning from the Bookmarks activity.
1944         if (restartFromBookmarksActivity) {
1945             // Close the bookmarks drawer.
1946             drawerLayout.closeDrawer(GravityCompat.END);
1947
1948             // Reload the bookmarks drawer.
1949             loadBookmarksFolder();
1950
1951             // Reset `restartFromBookmarksActivity`.
1952             restartFromBookmarksActivity = false;
1953         }
1954
1955         // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
1956         updatePrivacyIcons(true);
1957     }
1958
1959     // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
1960     @Override
1961     public void onResume() {
1962         // Run the default commands.
1963         super.onResume();
1964
1965         // Resume JavaScript (if enabled).
1966         mainWebView.resumeTimers();
1967
1968         // Resume `mainWebView`.
1969         mainWebView.onResume();
1970
1971         // Resume the adView for the free flavor.
1972         if (BuildConfig.FLAVOR.contentEquals("free")) {
1973             // Resume the ad.
1974             AdHelper.resumeAd(findViewById(R.id.adview));
1975         }
1976
1977         // Display a message to the user if waiting for Orbot.
1978         if (waitingForOrbot && !orbotStatus.equals("ON")) {
1979             // Disable the wide view port so that the waiting for Orbot text is displayed correctly.
1980             mainWebView.getSettings().setUseWideViewPort(false);
1981
1982             // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
1983             mainWebView.loadData(waitingForOrbotHtmlString, "text/html", null);
1984         }
1985
1986         if (displayingFullScreenVideo) {
1987             // Remove the translucent overlays.
1988             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
1989
1990             // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
1991             drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
1992
1993             /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
1994              * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
1995              * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
1996              */
1997             rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
1998         }
1999     }
2000
2001     @Override
2002     public void onPause() {
2003         // Run the default commands.
2004         super.onPause();
2005
2006         // Pause `mainWebView`.
2007         mainWebView.onPause();
2008
2009         // Stop all JavaScript.
2010         mainWebView.pauseTimers();
2011
2012         // Pause the ad or it will continue to consume resources in the background on the free flavor.
2013         if (BuildConfig.FLAVOR.contentEquals("free")) {
2014             // Pause the ad.
2015             AdHelper.pauseAd(findViewById(R.id.adview));
2016         }
2017     }
2018
2019     @Override
2020     public void onDestroy() {
2021         // Unregister the Orbot status broadcast receiver.
2022         this.unregisterReceiver(orbotStatusBroadcastReceiver);
2023
2024         // Close the bookmarks cursor and database.
2025         bookmarksCursor.close();
2026         bookmarksDatabaseHelper.close();
2027
2028         // Run the default commands.
2029         super.onDestroy();
2030     }
2031
2032     @Override
2033     public boolean onCreateOptionsMenu(Menu menu) {
2034         // Inflate the menu; this adds items to the action bar if it is present.
2035         getMenuInflater().inflate(R.menu.webview_options_menu, menu);
2036
2037         // Set mainMenu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons`.
2038         mainMenu = menu;
2039
2040         // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
2041         updatePrivacyIcons(false);
2042
2043         // Get handles for the menu items.
2044         MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
2045         MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
2046         MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
2047         MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
2048         MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
2049         refreshMenuItem = menu.findItem(R.id.refresh);
2050         blocklistsMenuItem = menu.findItem(R.id.blocklists);
2051         easyListMenuItem = menu.findItem(R.id.easylist);
2052         easyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
2053         fanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
2054         fanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
2055         ultraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
2056         blockAllThirdPartyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
2057         MenuItem adConsentMenuItem = menu.findItem(R.id.ad_consent);
2058
2059         // Only display third-party cookies if API >= 21
2060         toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
2061
2062         // Only display the form data menu items if the API < 26.
2063         toggleSaveFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
2064         clearFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
2065
2066         // Only show Ad Consent if this is the free flavor.
2067         adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
2068
2069         // Get the shared preference values.
2070         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
2071
2072         // Get the status of the additional AppBar icons.
2073         displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
2074
2075         // 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.
2076         if (displayAdditionalAppBarIcons) {
2077             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
2078             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
2079             refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
2080         } else { //Do not display the additional icons.
2081             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
2082             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
2083             refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
2084         }
2085
2086         // Replace Refresh with Stop if a URL is already loading.
2087         if (urlIsLoading) {
2088             // Set the title.
2089             refreshMenuItem.setTitle(R.string.stop);
2090
2091             // If the icon is displayed in the AppBar, set it according to the theme.
2092             if (displayAdditionalAppBarIcons) {
2093                 if (darkTheme) {
2094                     refreshMenuItem.setIcon(R.drawable.close_dark);
2095                 } else {
2096                     refreshMenuItem.setIcon(R.drawable.close_light);
2097                 }
2098             }
2099         }
2100
2101         return true;
2102     }
2103
2104     @Override
2105     public boolean onPrepareOptionsMenu(Menu menu) {
2106         // Get handles for the menu items.
2107         MenuItem addOrEditDomain = menu.findItem(R.id.add_or_edit_domain);
2108         MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
2109         MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
2110         MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
2111         MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
2112         MenuItem clearDataMenuItem = menu.findItem(R.id.clear_data);
2113         MenuItem clearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
2114         MenuItem clearDOMStorageMenuItem = menu.findItem(R.id.clear_dom_storage);
2115         MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
2116         MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
2117         MenuItem swipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
2118         MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
2119         MenuItem nightModeMenuItem = menu.findItem(R.id.night_mode);
2120         MenuItem proxyThroughOrbotMenuItem = menu.findItem(R.id.proxy_through_orbot);
2121
2122         // Set the text for the domain menu item.
2123         if (domainSettingsApplied) {
2124             addOrEditDomain.setTitle(R.string.edit_domain_settings);
2125         } else {
2126             addOrEditDomain.setTitle(R.string.add_domain_settings);
2127         }
2128
2129         // Set the status of the menu item checkboxes.
2130         toggleFirstPartyCookiesMenuItem.setChecked(firstPartyCookiesEnabled);
2131         toggleThirdPartyCookiesMenuItem.setChecked(thirdPartyCookiesEnabled);
2132         toggleDomStorageMenuItem.setChecked(domStorageEnabled);
2133         toggleSaveFormDataMenuItem.setChecked(saveFormDataEnabled);  // Form data can be removed once the minimum API >= 26.
2134         easyListMenuItem.setChecked(easyListEnabled);
2135         easyPrivacyMenuItem.setChecked(easyPrivacyEnabled);
2136         fanboysAnnoyanceListMenuItem.setChecked(fanboysAnnoyanceListEnabled);
2137         fanboysSocialBlockingListMenuItem.setChecked(fanboysSocialBlockingListEnabled);
2138         ultraPrivacyMenuItem.setChecked(ultraPrivacyEnabled);
2139         blockAllThirdPartyRequestsMenuItem.setChecked(blockAllThirdPartyRequests);
2140         swipeToRefreshMenuItem.setChecked(swipeRefreshLayout.isEnabled());
2141         displayImagesMenuItem.setChecked(mainWebView.getSettings().getLoadsImagesAutomatically());
2142         nightModeMenuItem.setChecked(nightMode);
2143         proxyThroughOrbotMenuItem.setChecked(proxyThroughOrbot);
2144
2145         // Enable third-party cookies if first-party cookies are enabled.
2146         toggleThirdPartyCookiesMenuItem.setEnabled(firstPartyCookiesEnabled);
2147
2148         // Enable DOM Storage if JavaScript is enabled.
2149         toggleDomStorageMenuItem.setEnabled(javaScriptEnabled);
2150
2151         // Enable Clear Cookies if there are any.
2152         clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
2153
2154         // Get a count of the number of files in the Local Storage directory.
2155         File localStorageDirectory = new File (privateDataDirectoryString + "/app_webview/Local Storage/");
2156         int localStorageDirectoryNumberOfFiles = 0;
2157         if (localStorageDirectory.exists()) {
2158             localStorageDirectoryNumberOfFiles = localStorageDirectory.list().length;
2159         }
2160
2161         // Get a count of the number of files in the IndexedDB directory.
2162         File indexedDBDirectory = new File (privateDataDirectoryString + "/app_webview/IndexedDB");
2163         int indexedDBDirectoryNumberOfFiles = 0;
2164         if (indexedDBDirectory.exists()) {
2165             indexedDBDirectoryNumberOfFiles = indexedDBDirectory.list().length;
2166         }
2167
2168         // Enable Clear DOM Storage if there is any.
2169         clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
2170
2171         // Enable Clear Form Data is there is any.  This can be removed once the minimum API >= 26.
2172         if (Build.VERSION.SDK_INT < 26) {
2173             WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(this);
2174             clearFormDataMenuItem.setEnabled(mainWebViewDatabase.hasFormData());
2175         } else {
2176             // Disable clear form data because it is not supported on current version of Android.
2177             clearFormDataMenuItem.setEnabled(false);
2178         }
2179
2180         // Enable Clear Data if any of the submenu items are enabled.
2181         clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
2182
2183         // Disable Fanboy's Social Blocking List if Fanboy's Annoyance List is checked.
2184         fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListEnabled);
2185
2186         // Initialize the display names for the blocklists with the number of blocked requests.
2187         blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + blockedRequests);
2188         easyListMenuItem.setTitle(easyListBlockedRequests + " - " + getString(R.string.easylist));
2189         easyPrivacyMenuItem.setTitle(easyPrivacyBlockedRequests + " - " + getString(R.string.easyprivacy));
2190         fanboysAnnoyanceListMenuItem.setTitle(fanboysAnnoyanceListBlockedRequests + " - " + getString(R.string.fanboys_annoyance_list));
2191         fanboysSocialBlockingListMenuItem.setTitle(fanboysSocialBlockingListBlockedRequests + " - " + getString(R.string.fanboys_social_blocking_list));
2192         ultraPrivacyMenuItem.setTitle(ultraPrivacyBlockedRequests + " - " + getString(R.string.ultraprivacy));
2193         blockAllThirdPartyRequestsMenuItem.setTitle(thirdPartyBlockedRequests + " - " + getString(R.string.block_all_third_party_requests));
2194
2195         // Get the current user agent.
2196         String currentUserAgent = mainWebView.getSettings().getUserAgentString();
2197
2198         // Select the current user agent menu item.  A switch statement cannot be used because the user agents are not compile time constants.
2199         if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[0])) {  // Privacy Browser.
2200             menu.findItem(R.id.user_agent_privacy_browser).setChecked(true);
2201         } else if (currentUserAgent.equals(webViewDefaultUserAgent)) {  // WebView Default.
2202             menu.findItem(R.id.user_agent_webview_default).setChecked(true);
2203         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[2])) {  // Firefox on Android.
2204             menu.findItem(R.id.user_agent_firefox_on_android).setChecked(true);
2205         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[3])) {  // Chrome on Android.
2206             menu.findItem(R.id.user_agent_chrome_on_android).setChecked(true);
2207         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[4])) {  // Safari on iOS.
2208             menu.findItem(R.id.user_agent_safari_on_ios).setChecked(true);
2209         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[5])) {  // Firefox on Linux.
2210             menu.findItem(R.id.user_agent_firefox_on_linux).setChecked(true);
2211         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[6])) {  // Chromium on Linux.
2212             menu.findItem(R.id.user_agent_chromium_on_linux).setChecked(true);
2213         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[7])) {  // Firefox on Windows.
2214             menu.findItem(R.id.user_agent_firefox_on_windows).setChecked(true);
2215         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[8])) {  // Chrome on Windows.
2216             menu.findItem(R.id.user_agent_chrome_on_windows).setChecked(true);
2217         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[9])) {  // Edge on Windows.
2218             menu.findItem(R.id.user_agent_edge_on_windows).setChecked(true);
2219         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[10])) {  // Internet Explorer on Windows.
2220             menu.findItem(R.id.user_agent_internet_explorer_on_windows).setChecked(true);
2221         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[11])) {  // Safari on macOS.
2222             menu.findItem(R.id.user_agent_safari_on_macos).setChecked(true);
2223         } else {  // Custom user agent.
2224             menu.findItem(R.id.user_agent_custom).setChecked(true);
2225         }
2226
2227         // Initialize font size variables.
2228         int fontSize = mainWebView.getSettings().getTextZoom();
2229         String fontSizeTitle;
2230         MenuItem selectedFontSizeMenuItem;
2231
2232         // Prepare the font size title and current size menu item.
2233         switch (fontSize) {
2234             case 25:
2235                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.twenty_five_percent);
2236                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_twenty_five_percent);
2237                 break;
2238
2239             case 50:
2240                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
2241                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
2242                 break;
2243
2244             case 75:
2245                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.seventy_five_percent);
2246                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_seventy_five_percent);
2247                 break;
2248
2249             case 100:
2250                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
2251                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
2252                 break;
2253
2254             case 125:
2255                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_twenty_five_percent);
2256                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_twenty_five_percent);
2257                 break;
2258
2259             case 150:
2260                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_fifty_percent);
2261                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_fifty_percent);
2262                 break;
2263
2264             case 175:
2265                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_seventy_five_percent);
2266                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_seventy_five_percent);
2267                 break;
2268
2269             case 200:
2270                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.two_hundred_percent);
2271                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_two_hundred_percent);
2272                 break;
2273
2274             default:
2275                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
2276                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
2277                 break;
2278         }
2279
2280         // Set the font size title and select the current size menu item.
2281         fontSizeMenuItem.setTitle(fontSizeTitle);
2282         selectedFontSizeMenuItem.setChecked(true);
2283
2284         // Run all the other default commands.
2285         super.onPrepareOptionsMenu(menu);
2286
2287         // Display the menu.
2288         return true;
2289     }
2290
2291     @Override
2292     // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
2293     @SuppressLint("SetJavaScriptEnabled")
2294     // removeAllCookies is deprecated, but it is required for API < 21.
2295     @SuppressWarnings("deprecation")
2296     public boolean onOptionsItemSelected(MenuItem menuItem) {
2297         // Get the selected menu item ID.
2298         int menuItemId = menuItem.getItemId();
2299
2300         // Set the commands that relate to the menu entries.
2301         switch (menuItemId) {
2302             case R.id.toggle_javascript:
2303                 // Switch the status of javaScriptEnabled.
2304                 javaScriptEnabled = !javaScriptEnabled;
2305
2306                 // Apply the new JavaScript status.
2307                 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
2308
2309                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2310                 updatePrivacyIcons(true);
2311
2312                 // Display a `Snackbar`.
2313                 if (javaScriptEnabled) {  // JavaScrip is enabled.
2314                     Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
2315                 } else if (firstPartyCookiesEnabled) {  // JavaScript is disabled, but first-party cookies are enabled.
2316                     Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
2317                 } else {  // Privacy mode.
2318                     Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
2319                 }
2320
2321                 // Reload the WebView.
2322                 mainWebView.reload();
2323                 return true;
2324
2325             case R.id.add_or_edit_domain:
2326                 if (domainSettingsApplied) {  // Edit the current domain settings.
2327                     // Reapply the domain settings on returning to `MainWebViewActivity`.
2328                     reapplyDomainSettingsOnRestart = true;
2329                     currentDomainName = "";
2330
2331                     // Create an intent to launch the domains activity.
2332                     Intent domainsIntent = new Intent(this, DomainsActivity.class);
2333
2334                     // Put extra information instructing the domains activity to directly load the current domain and close on back instead of returning to the domains list.
2335                     domainsIntent.putExtra("loadDomain", domainSettingsDatabaseId);
2336                     domainsIntent.putExtra("closeOnBack", true);
2337
2338                     // Make it so.
2339                     startActivity(domainsIntent);
2340                 } else {  // Add a new domain.
2341                     // Apply the new domain settings on returning to `MainWebViewActivity`.
2342                     reapplyDomainSettingsOnRestart = true;
2343                     currentDomainName = "";
2344
2345                     // Get the current domain
2346                     Uri currentUri = Uri.parse(formattedUrlString);
2347                     String currentDomain = currentUri.getHost();
2348
2349                     // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
2350                     DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
2351
2352                     // Create the domain and store the database ID.
2353                     int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
2354
2355                     // Create an intent to launch the domains activity.
2356                     Intent domainsIntent = new Intent(this, DomainsActivity.class);
2357
2358                     // Put extra information instructing the domains activity to directly load the new domain and close on back instead of returning to the domains list.
2359                     domainsIntent.putExtra("loadDomain", newDomainDatabaseId);
2360                     domainsIntent.putExtra("closeOnBack", true);
2361
2362                     // Make it so.
2363                     startActivity(domainsIntent);
2364                 }
2365                 return true;
2366
2367             case R.id.toggle_first_party_cookies:
2368                 // Switch the status of firstPartyCookiesEnabled.
2369                 firstPartyCookiesEnabled = !firstPartyCookiesEnabled;
2370
2371                 // Update the menu checkbox.
2372                 menuItem.setChecked(firstPartyCookiesEnabled);
2373
2374                 // Apply the new cookie status.
2375                 cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
2376
2377                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2378                 updatePrivacyIcons(true);
2379
2380                 // Display a `Snackbar`.
2381                 if (firstPartyCookiesEnabled) {  // First-party cookies are enabled.
2382                     Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
2383                 } else if (javaScriptEnabled) {  // JavaScript is still enabled.
2384                     Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
2385                 } else {  // Privacy mode.
2386                     Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
2387                 }
2388
2389                 // Reload the WebView.
2390                 mainWebView.reload();
2391                 return true;
2392
2393             case R.id.toggle_third_party_cookies:
2394                 if (Build.VERSION.SDK_INT >= 21) {
2395                     // Switch the status of thirdPartyCookiesEnabled.
2396                     thirdPartyCookiesEnabled = !thirdPartyCookiesEnabled;
2397
2398                     // Update the menu checkbox.
2399                     menuItem.setChecked(thirdPartyCookiesEnabled);
2400
2401                     // Apply the new cookie status.
2402                     cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
2403
2404                     // Display a `Snackbar`.
2405                     if (thirdPartyCookiesEnabled) {
2406                         Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
2407                     } else {
2408                         Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
2409                     }
2410
2411                     // Reload the WebView.
2412                     mainWebView.reload();
2413                 } // Else do nothing because SDK < 21.
2414                 return true;
2415
2416             case R.id.toggle_dom_storage:
2417                 // Switch the status of domStorageEnabled.
2418                 domStorageEnabled = !domStorageEnabled;
2419
2420                 // Update the menu checkbox.
2421                 menuItem.setChecked(domStorageEnabled);
2422
2423                 // Apply the new DOM Storage status.
2424                 mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
2425
2426                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2427                 updatePrivacyIcons(true);
2428
2429                 // Display a `Snackbar`.
2430                 if (domStorageEnabled) {
2431                     Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
2432                 } else {
2433                     Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
2434                 }
2435
2436                 // Reload the WebView.
2437                 mainWebView.reload();
2438                 return true;
2439
2440             // Form data can be removed once the minimum API >= 26.
2441             case R.id.toggle_save_form_data:
2442                 // Switch the status of saveFormDataEnabled.
2443                 saveFormDataEnabled = !saveFormDataEnabled;
2444
2445                 // Update the menu checkbox.
2446                 menuItem.setChecked(saveFormDataEnabled);
2447
2448                 // Apply the new form data status.
2449                 mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
2450
2451                 // Display a `Snackbar`.
2452                 if (saveFormDataEnabled) {
2453                     Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
2454                 } else {
2455                     Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
2456                 }
2457
2458                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2459                 updatePrivacyIcons(true);
2460
2461                 // Reload the WebView.
2462                 mainWebView.reload();
2463                 return true;
2464
2465             case R.id.clear_cookies:
2466                 Snackbar.make(findViewById(R.id.main_webview), R.string.cookies_deleted, Snackbar.LENGTH_LONG)
2467                         .setAction(R.string.undo, v -> {
2468                             // Do nothing because everything will be handled by `onDismissed()` below.
2469                         })
2470                         .addCallback(new Snackbar.Callback() {
2471                             @Override
2472                             public void onDismissed(Snackbar snackbar, int event) {
2473                                 switch (event) {
2474                                     // The user pushed the `Undo` button.
2475                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
2476                                         // Do nothing.
2477                                         break;
2478
2479                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
2480                                     default:
2481                                         // `cookieManager.removeAllCookie()` varies by SDK.
2482                                         if (Build.VERSION.SDK_INT < 21) {
2483                                             cookieManager.removeAllCookie();
2484                                         } else {
2485                                             // `null` indicates no callback.
2486                                             cookieManager.removeAllCookies(null);
2487                                         }
2488                                 }
2489                             }
2490                         })
2491                         .show();
2492                 return true;
2493
2494             case R.id.clear_dom_storage:
2495                 Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
2496                         .setAction(R.string.undo, v -> {
2497                             // Do nothing because everything will be handled by `onDismissed()` below.
2498                         })
2499                         .addCallback(new Snackbar.Callback() {
2500                             @Override
2501                             public void onDismissed(Snackbar snackbar, int event) {
2502                                 switch (event) {
2503                                     // The user pushed the `Undo` button.
2504                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
2505                                         // Do nothing.
2506                                         break;
2507
2508                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
2509                                     default:
2510                                         // Delete the DOM Storage.
2511                                         WebStorage webStorage = WebStorage.getInstance();
2512                                         webStorage.deleteAllData();
2513
2514                                         // Initialize a handler to manually delete the DOM storage files and directories.
2515                                         Handler deleteDomStorageHandler = new Handler();
2516
2517                                         // Setup a runnable to manually delete the DOM storage files and directories.
2518                                         Runnable deleteDomStorageRunnable = () -> {
2519                                             try {
2520                                                 // A `String[]` must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
2521                                                 privacyBrowserRuntime.exec(new String[]{"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
2522
2523                                                 // Multiple commands must be used because `Runtime.exec()` does not like `*`.
2524                                                 privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
2525                                                 privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
2526                                                 privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
2527                                                 privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
2528                                             } catch (IOException e) {
2529                                                 // Do nothing if an error is thrown.
2530                                             }
2531                                         };
2532
2533                                         // Manually delete the DOM storage files after 200 milliseconds.
2534                                         deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
2535                                 }
2536                             }
2537                         })
2538                         .show();
2539                 return true;
2540
2541             // Form data can be remove once the minimum API >= 26.
2542             case R.id.clear_form_data:
2543                 Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_deleted, Snackbar.LENGTH_LONG)
2544                         .setAction(R.string.undo, v -> {
2545                             // Do nothing because everything will be handled by `onDismissed()` below.
2546                         })
2547                         .addCallback(new Snackbar.Callback() {
2548                             @Override
2549                             public void onDismissed(Snackbar snackbar, int event) {
2550                                 switch (event) {
2551                                     // The user pushed the `Undo` button.
2552                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
2553                                         // Do nothing.
2554                                         break;
2555
2556                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
2557                                     default:
2558                                         // Delete the form data.
2559                                         WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
2560                                         mainWebViewDatabase.clearFormData();
2561                                 }
2562                             }
2563                         })
2564                         .show();
2565                 return true;
2566
2567             case R.id.easylist:
2568                 // Toggle the EasyList status.
2569                 easyListEnabled = !easyListEnabled;
2570
2571                 // Update the menu checkbox.
2572                 menuItem.setChecked(easyListEnabled);
2573
2574                 // Reload the main WebView.
2575                 mainWebView.reload();
2576                 return true;
2577
2578             case R.id.easyprivacy:
2579                 // Toggle the EasyPrivacy status.
2580                 easyPrivacyEnabled = !easyPrivacyEnabled;
2581
2582                 // Update the menu checkbox.
2583                 menuItem.setChecked(easyPrivacyEnabled);
2584
2585                 // Reload the main WebView.
2586                 mainWebView.reload();
2587                 return true;
2588
2589             case R.id.fanboys_annoyance_list:
2590                 // Toggle Fanboy's Annoyance List status.
2591                 fanboysAnnoyanceListEnabled = !fanboysAnnoyanceListEnabled;
2592
2593                 // Update the menu checkbox.
2594                 menuItem.setChecked(fanboysAnnoyanceListEnabled);
2595
2596                 // Update the staus of Fanboy's Social Blocking List.
2597                 MenuItem fanboysSocialBlockingListMenuItem = mainMenu.findItem(R.id.fanboys_social_blocking_list);
2598                 fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListEnabled);
2599
2600                 // Reload the main WebView.
2601                 mainWebView.reload();
2602                 return true;
2603
2604             case R.id.fanboys_social_blocking_list:
2605                 // Toggle Fanboy's Social Blocking List status.
2606                 fanboysSocialBlockingListEnabled = !fanboysSocialBlockingListEnabled;
2607
2608                 // Update the menu checkbox.
2609                 menuItem.setChecked(fanboysSocialBlockingListEnabled);
2610
2611                 // Reload the main WebView.
2612                 mainWebView.reload();
2613                 return true;
2614
2615             case R.id.ultraprivacy:
2616                 // Toggle the UltraPrivacy status.
2617                 ultraPrivacyEnabled = !ultraPrivacyEnabled;
2618
2619                 // Update the menu checkbox.
2620                 menuItem.setChecked(ultraPrivacyEnabled);
2621
2622                 // Reload the main WebView.
2623                 mainWebView.reload();
2624                 return true;
2625
2626             case R.id.block_all_third_party_requests:
2627                 //Toggle the third-party requests blocker status.
2628                 blockAllThirdPartyRequests = !blockAllThirdPartyRequests;
2629
2630                 // Update the menu checkbox.
2631                 menuItem.setChecked(blockAllThirdPartyRequests);
2632
2633                 // Reload the main WebView.
2634                 mainWebView.reload();
2635                 return true;
2636
2637             case R.id.user_agent_privacy_browser:
2638                 // Update the user agent.
2639                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
2640
2641                 // Reload the WebView.
2642                 mainWebView.reload();
2643                 return true;
2644
2645             case R.id.user_agent_webview_default:
2646                 // Update the user agent.
2647                 mainWebView.getSettings().setUserAgentString("");
2648
2649                 // Reload the WebView.
2650                 mainWebView.reload();
2651                 return true;
2652
2653             case R.id.user_agent_firefox_on_android:
2654                 // Update the user agent.
2655                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
2656
2657                 // Reload the WebView.
2658                 mainWebView.reload();
2659                 return true;
2660
2661             case R.id.user_agent_chrome_on_android:
2662                 // Update the user agent.
2663                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);
2664
2665                 // Reload the WebView.
2666                 mainWebView.reload();
2667                 return true;
2668
2669             case R.id.user_agent_safari_on_ios:
2670                 // Update the user agent.
2671                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
2672
2673                 // Reload the WebView.
2674                 mainWebView.reload();
2675                 return true;
2676
2677             case R.id.user_agent_firefox_on_linux:
2678                 // Update the user agent.
2679                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
2680
2681                 // Reload the WebView.
2682                 mainWebView.reload();
2683                 return true;
2684
2685             case R.id.user_agent_chromium_on_linux:
2686                 // Update the user agent.
2687                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
2688
2689                 // Reload the WebView.
2690                 mainWebView.reload();
2691                 return true;
2692
2693             case R.id.user_agent_firefox_on_windows:
2694                 // Update the user agent.
2695                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
2696
2697                 // Reload the WebView.
2698                 mainWebView.reload();
2699                 return true;
2700
2701             case R.id.user_agent_chrome_on_windows:
2702                 // Update the user agent.
2703                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
2704
2705                 // Reload the WebView.
2706                 mainWebView.reload();
2707                 return true;
2708
2709             case R.id.user_agent_edge_on_windows:
2710                 // Update the user agent.
2711                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
2712
2713                 // Reload the WebView.
2714                 mainWebView.reload();
2715                 return true;
2716
2717             case R.id.user_agent_internet_explorer_on_windows:
2718                 // Update the user agent.
2719                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
2720
2721                 // Reload the WebView.
2722                 mainWebView.reload();
2723                 return true;
2724
2725             case R.id.user_agent_safari_on_macos:
2726                 // Update the user agent.
2727                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
2728
2729                 // Reload the WebView.
2730                 mainWebView.reload();
2731                 return true;
2732
2733             case R.id.user_agent_custom:
2734                 // Update the user agent.
2735                 mainWebView.getSettings().setUserAgentString(defaultCustomUserAgentString);
2736
2737                 // Reload the WebView.
2738                 mainWebView.reload();
2739                 return true;
2740
2741             case R.id.font_size_twenty_five_percent:
2742                 mainWebView.getSettings().setTextZoom(25);
2743                 return true;
2744
2745             case R.id.font_size_fifty_percent:
2746                 mainWebView.getSettings().setTextZoom(50);
2747                 return true;
2748
2749             case R.id.font_size_seventy_five_percent:
2750                 mainWebView.getSettings().setTextZoom(75);
2751                 return true;
2752
2753             case R.id.font_size_one_hundred_percent:
2754                 mainWebView.getSettings().setTextZoom(100);
2755                 return true;
2756
2757             case R.id.font_size_one_hundred_twenty_five_percent:
2758                 mainWebView.getSettings().setTextZoom(125);
2759                 return true;
2760
2761             case R.id.font_size_one_hundred_fifty_percent:
2762                 mainWebView.getSettings().setTextZoom(150);
2763                 return true;
2764
2765             case R.id.font_size_one_hundred_seventy_five_percent:
2766                 mainWebView.getSettings().setTextZoom(175);
2767                 return true;
2768
2769             case R.id.font_size_two_hundred_percent:
2770                 mainWebView.getSettings().setTextZoom(200);
2771                 return true;
2772
2773             case R.id.swipe_to_refresh:
2774                 // Toggle swipe to refresh.
2775                 swipeRefreshLayout.setEnabled(!swipeRefreshLayout.isEnabled());
2776                 return true;
2777
2778             case R.id.display_images:
2779                 if (mainWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
2780                     mainWebView.getSettings().setLoadsImagesAutomatically(false);
2781                     mainWebView.reload();
2782                 } else {  // Images are not currently loaded automatically.
2783                     mainWebView.getSettings().setLoadsImagesAutomatically(true);
2784                 }
2785                 return true;
2786
2787             case R.id.night_mode:
2788                 // Toggle night mode.
2789                 nightMode = !nightMode;
2790
2791                 // Enable or disable JavaScript according to night mode, the global preference, and any domain settings.
2792                 if (nightMode) {  // Night mode is enabled.  Enable JavaScript.
2793                     // Update the global variable.
2794                     javaScriptEnabled = true;
2795                 } else if (domainSettingsApplied) {  // Night mode is disabled and domain settings are applied.  Set JavaScript according to the domain settings.
2796                     // Get the JavaScript preference that was stored the last time domain settings were loaded.
2797                     javaScriptEnabled = domainSettingsJavaScriptEnabled;
2798                 } else {  // Night mode is disabled and domain settings are not applied.  Set JavaScript according to the global preference.
2799                     // Get a handle for the shared preference.
2800                     SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
2801
2802                     // Get the JavaScript preference.
2803                     javaScriptEnabled = sharedPreferences.getBoolean("javascript", false);
2804                 }
2805
2806                 // Apply the JavaScript setting to the WebView.
2807                 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
2808
2809                 // Update the privacy icons.
2810                 updatePrivacyIcons(false);
2811
2812                 // Reload the website.
2813                 mainWebView.reload();
2814                 return true;
2815
2816             case R.id.print:
2817                 // Get a `PrintManager` instance.
2818                 PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
2819
2820                 // Convert `mainWebView` to `printDocumentAdapter`.
2821                 PrintDocumentAdapter printDocumentAdapter = mainWebView.createPrintDocumentAdapter();
2822
2823                 // Remove the lint error below that `printManager` might be `null`.
2824                 assert printManager != null;
2825
2826                 // Print the document.  The print attributes are `null`.
2827                 printManager.print(getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
2828                 return true;
2829
2830             case R.id.view_source:
2831                 // Launch the View Source activity.
2832                 Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
2833                 startActivity(viewSourceIntent);
2834                 return true;
2835
2836             case R.id.proxy_through_orbot:
2837                 // Toggle the proxy through Orbot variable.
2838                 proxyThroughOrbot = !proxyThroughOrbot;
2839
2840                 // Apply the proxy through Orbot settings.
2841                 applyProxyThroughOrbot(true);
2842                 return true;
2843
2844             case R.id.share:
2845                 // Setup the share string.
2846                 String shareString = webViewTitle + " – " + urlTextBox.getText().toString();
2847
2848                 // Create the share intent.
2849                 Intent shareIntent = new Intent(Intent.ACTION_SEND);
2850                 shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
2851                 shareIntent.setType("text/plain");
2852
2853                 // Make it so.
2854                 startActivity(Intent.createChooser(shareIntent, "Share URL"));
2855                 return true;
2856
2857             case R.id.find_on_page:
2858                 // Hide the URL app bar.
2859                 supportAppBar.setVisibility(View.GONE);
2860
2861                 // Show the Find on Page `RelativeLayout`.
2862                 findOnPageLinearLayout.setVisibility(View.VISIBLE);
2863
2864                 // Display the keyboard.  We have to wait 200 ms before running the command to work around a bug in Android.
2865                 // http://stackoverflow.com/questions/5520085/android-show-softkeyboard-with-showsoftinput-is-not-working
2866                 findOnPageEditText.postDelayed(() -> {
2867                     // Set the focus on `findOnPageEditText`.
2868                     findOnPageEditText.requestFocus();
2869
2870                     // Display the keyboard.  `0` sets no input flags.
2871                     inputMethodManager.showSoftInput(findOnPageEditText, 0);
2872                 }, 200);
2873                 return true;
2874
2875             case R.id.add_to_homescreen:
2876                 // Show the `CreateHomeScreenShortcutDialog` `AlertDialog` and name this instance `R.string.create_shortcut`.
2877                 AppCompatDialogFragment createHomeScreenShortcutDialogFragment = new CreateHomeScreenShortcutDialog();
2878                 createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
2879
2880                 //Everything else will be handled by `CreateHomeScreenShortcutDialog` and the associated listener below.
2881                 return true;
2882
2883             case R.id.refresh:
2884                 if (menuItem.getTitle().equals(getString(R.string.refresh))) {  // The refresh button was pushed.
2885                     // Reload the WebView.
2886                     mainWebView.reload();
2887                 } else {  // The stop button was pushed.
2888                     // Stop the loading of the WebView.
2889                     mainWebView.stopLoading();
2890                 }
2891                 return true;
2892
2893             case R.id.ad_consent:
2894                 // Display the ad consent dialog.
2895                 DialogFragment adConsentDialogFragment = new AdConsentDialog();
2896                 adConsentDialogFragment.show(getFragmentManager(), getString(R.string.ad_consent));
2897                 return true;
2898
2899             default:
2900                 // Don't consume the event.
2901                 return super.onOptionsItemSelected(menuItem);
2902         }
2903     }