f2a422a27b781649e0ce00618ce62ce1addb8ee9
[PrivacyBrowser.git] / app / src / main / java / com / stoutner / privacybrowser / activities / MainWebViewActivity.java
1 /*
2  * Copyright © 2015-2018 Soren Stoutner <soren@stoutner.com>.
3  *
4  * Download cookie code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
5  *
6  * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
7  *
8  * Privacy Browser is free software: you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation, either version 3 of the License, or
11  * (at your option) any later version.
12  *
13  * Privacy Browser is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
20  */
21
22 package com.stoutner.privacybrowser.activities;
23
24 import android.Manifest;
25 import android.annotation.SuppressLint;
26 import android.app.Activity;
27 import android.app.DialogFragment;
28 import android.app.DownloadManager;
29 import android.content.ActivityNotFoundException;
30 import android.content.BroadcastReceiver;
31 import android.content.ClipData;
32 import android.content.ClipboardManager;
33 import android.content.Context;
34 import android.content.Intent;
35 import android.content.IntentFilter;
36 import android.content.SharedPreferences;
37 import android.content.pm.PackageManager;
38 import android.content.res.Configuration;
39 import android.database.Cursor;
40 import android.graphics.Bitmap;
41 import android.graphics.BitmapFactory;
42 import android.graphics.Typeface;
43 import android.graphics.drawable.BitmapDrawable;
44 import android.graphics.drawable.Drawable;
45 import android.net.Uri;
46 import android.net.http.SslCertificate;
47 import android.net.http.SslError;
48 import android.os.Build;
49 import android.os.Bundle;
50 import android.os.Environment;
51 import android.os.Handler;
52 import android.preference.PreferenceManager;
53 import android.print.PrintDocumentAdapter;
54 import android.print.PrintManager;
55 import android.support.annotation.NonNull;
56 import android.support.design.widget.CoordinatorLayout;
57 import android.support.design.widget.FloatingActionButton;
58 import android.support.design.widget.NavigationView;
59 import android.support.design.widget.Snackbar;
60 import android.support.v4.app.ActivityCompat;
61 import android.support.v4.content.ContextCompat;
62 // `ShortcutInfoCompat`, `ShortcutManagerCompat`, and `IconCompat` can be switched to the non-compat version once API >= 26.
63 import android.support.v4.content.pm.ShortcutInfoCompat;
64 import android.support.v4.content.pm.ShortcutManagerCompat;
65 import android.support.v4.graphics.drawable.IconCompat;
66 import android.support.v4.view.GravityCompat;
67 import android.support.v4.widget.DrawerLayout;
68 import android.support.v4.widget.SwipeRefreshLayout;
69 import android.support.v7.app.ActionBar;
70 import android.support.v7.app.ActionBarDrawerToggle;
71 import android.support.v7.app.AppCompatActivity;
72 import android.support.v7.app.AppCompatDialogFragment;
73 import android.support.v7.widget.Toolbar;
74 import android.text.Editable;
75 import android.text.Spanned;
76 import android.text.TextWatcher;
77 import android.text.style.ForegroundColorSpan;
78 import android.util.Patterns;
79 import android.view.ContextMenu;
80 import android.view.GestureDetector;
81 import android.view.KeyEvent;
82 import android.view.Menu;
83 import android.view.MenuItem;
84 import android.view.MotionEvent;
85 import android.view.View;
86 import android.view.ViewGroup;
87 import android.view.WindowManager;
88 import android.view.inputmethod.InputMethodManager;
89 import android.webkit.CookieManager;
90 import android.webkit.HttpAuthHandler;
91 import android.webkit.SslErrorHandler;
92 import android.webkit.ValueCallback;
93 import android.webkit.WebBackForwardList;
94 import android.webkit.WebChromeClient;
95 import android.webkit.WebResourceResponse;
96 import android.webkit.WebStorage;
97 import android.webkit.WebView;
98 import android.webkit.WebViewClient;
99 import android.webkit.WebViewDatabase;
100 import android.widget.ArrayAdapter;
101 import android.widget.CursorAdapter;
102 import android.widget.EditText;
103 import android.widget.FrameLayout;
104 import android.widget.ImageView;
105 import android.widget.LinearLayout;
106 import android.widget.ListView;
107 import android.widget.ProgressBar;
108 import android.widget.RadioButton;
109 import android.widget.RelativeLayout;
110 import android.widget.TextView;
111
112 import com.stoutner.privacybrowser.BuildConfig;
113 import com.stoutner.privacybrowser.R;
114 import com.stoutner.privacybrowser.dialogs.AdConsentDialog;
115 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
116 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
117 import com.stoutner.privacybrowser.dialogs.CreateHomeScreenShortcutDialog;
118 import com.stoutner.privacybrowser.dialogs.DownloadImageDialog;
119 import com.stoutner.privacybrowser.dialogs.DownloadLocationPermissionDialog;
120 import com.stoutner.privacybrowser.dialogs.EditBookmarkDialog;
121 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
122 import com.stoutner.privacybrowser.dialogs.HttpAuthenticationDialog;
123 import com.stoutner.privacybrowser.dialogs.PinnedSslCertificateMismatchDialog;
124 import com.stoutner.privacybrowser.dialogs.UrlHistoryDialog;
125 import com.stoutner.privacybrowser.dialogs.ViewSslCertificateDialog;
126 import com.stoutner.privacybrowser.helpers.AdHelper;
127 import com.stoutner.privacybrowser.helpers.BlockListHelper;
128 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
129 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
130 import com.stoutner.privacybrowser.helpers.OrbotProxyHelper;
131 import com.stoutner.privacybrowser.dialogs.DownloadFileDialog;
132 import com.stoutner.privacybrowser.dialogs.SslCertificateErrorDialog;
133
134 import java.io.ByteArrayInputStream;
135 import java.io.ByteArrayOutputStream;
136 import java.io.File;
137 import java.io.IOException;
138 import java.io.UnsupportedEncodingException;
139 import java.net.MalformedURLException;
140 import java.net.URL;
141 import java.net.URLDecoder;
142 import java.net.URLEncoder;
143 import java.util.ArrayList;
144 import java.util.Date;
145 import java.util.HashMap;
146 import java.util.HashSet;
147 import java.util.List;
148 import java.util.Map;
149 import java.util.Set;
150
151 // AppCompatActivity from android.support.v7.app.AppCompatActivity must be used to have access to the SupportActionBar until the minimum API is >= 21.
152 public class MainWebViewActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener,
153         CreateHomeScreenShortcutDialog.CreateHomeScreenShortcutListener, DownloadFileDialog.DownloadFileListener, DownloadImageDialog.DownloadImageListener,
154         DownloadLocationPermissionDialog.DownloadLocationPermissionDialogListener, EditBookmarkDialog.EditBookmarkListener, EditBookmarkFolderDialog.EditBookmarkFolderListener,
155         HttpAuthenticationDialog.HttpAuthenticationListener, NavigationView.OnNavigationItemSelectedListener, PinnedSslCertificateMismatchDialog.PinnedSslCertificateMismatchListener,
156         SslCertificateErrorDialog.SslCertificateErrorListener, UrlHistoryDialog.UrlHistoryListener {
157
158     // `darkTheme` is public static so it can be accessed from everywhere.
159     public static boolean darkTheme;
160
161     // `allowScreenshots` is public static so it can be accessed from everywhere.  It is also used in `onCreate()`.
162     public static boolean allowScreenshots;
163
164     // `favoriteIconBitmap` is public static so it can be accessed from `CreateHomeScreenShortcutDialog`, `BookmarksActivity`, `BookmarksDatabaseViewActivity`, `CreateBookmarkDialog`,
165     // `CreateBookmarkFolderDialog`, `EditBookmarkDialog`, `EditBookmarkFolderDialog`, `EditBookmarkDatabaseViewDialog`, and `ViewSslCertificateDialog`.  It is also used in `onCreate()`,
166     // `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onCreateHomeScreenShortcutCreate()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `applyDomainSettings()`.
167     public static Bitmap favoriteIconBitmap;
168
169     // `formattedUrlString` is public static so it can be accessed from `BookmarksActivity`, `CreateBookmarkDialog`, and `AddDomainDialog`.
170     // It is also used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onCreateHomeScreenShortcutCreate()`, and `loadUrlFromTextBox()`.
171     public static String formattedUrlString;
172
173     // `sslCertificate` is public static so it can be accessed from `DomainsActivity`, `DomainsListFragment`, `DomainSettingsFragment`, `PinnedSslCertificateMismatchDialog`,
174     // and `ViewSslCertificateDialog`.  It is also used in `onCreate()`.
175     public static SslCertificate sslCertificate;
176
177     // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()` and `onResume()`.
178     public static String orbotStatus;
179
180     // `webViewTitle` is public static so it can be accessed from `CreateBookmarkDialog` and `CreateHomeScreenShortcutDialog`.  It is also used in `onCreate()`.
181     public static String webViewTitle;
182
183     // `appliedUserAgentString` is public static so it can be accessed from `ViewSourceActivity`.  It is also used in `applyDomainSettings()`.
184     public static String appliedUserAgentString;
185
186     // `reloadOnRestart` is public static so it can be accessed from `SettingsFragment`.  It is also used in `onRestart()`
187     public static boolean reloadOnRestart;
188
189     // `reloadUrlOnRestart` is public static so it can be accessed from `SettingsFragment` and `BookmarksActivity`.  It is also used in `onRestart()`.
190     public static boolean loadUrlOnRestart;
191
192     // `restartFromBookmarksActivity` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onRestart()`.
193     public static boolean restartFromBookmarksActivity;
194
195     // The block list versions are public static so they can be accessed from `AboutTabFragment`.  They are also used in `onCreate()`.
196     public static String easyListVersion;
197     public static String easyPrivacyVersion;
198     public static String fanboysAnnoyanceVersion;
199     public static String fanboysSocialVersion;
200     public static String ultraPrivacyVersion;
201
202     // The request items are public static so they can be accessed by `BlockListHelper`, `RequestsArrayAdapter`, and `ViewRequestsDialog`.  They are also used in `onCreate()` and `onPrepareOptionsMenu()`.
203     public static List<String[]> resourceRequests;
204     public static String[] whiteListResultStringArray;
205     private int blockedRequests;
206     private int easyListBlockedRequests;
207     private int easyPrivacyBlockedRequests;
208     private int fanboysAnnoyanceListBlockedRequests;
209     private int fanboysSocialBlockingListBlockedRequests;
210     private int ultraPrivacyBlockedRequests;
211     private int thirdPartyBlockedRequests;
212
213     public final static int REQUEST_DISPOSITION = 0;
214     public final static int REQUEST_URL = 1;
215     public final static int REQUEST_BLOCKLIST = 2;
216     public final static int REQUEST_SUBLIST = 3;
217     public final static int REQUEST_BLOCKLIST_ENTRIES = 4;
218     public final static int REQUEST_BLOCKLIST_ORIGINAL_ENTRY = 5;
219
220     public final static int REQUEST_DEFAULT = 0;
221     public final static int REQUEST_ALLOWED = 1;
222     public final static int REQUEST_THIRD_PARTY = 2;
223     public final static int REQUEST_BLOCKED = 3;
224
225     public final static int MAIN_WHITELIST = 1;
226     public final static int FINAL_WHITELIST = 2;
227     public final static int DOMAIN_WHITELIST = 3;
228     public final static int DOMAIN_INITIAL_WHITELIST = 4;
229     public final static int DOMAIN_FINAL_WHITELIST = 5;
230     public final static int THIRD_PARTY_WHITELIST = 6;
231     public final static int THIRD_PARTY_DOMAIN_WHITELIST = 7;
232     public final static int THIRD_PARTY_DOMAIN_INITIAL_WHITELIST = 8;
233
234     public final static int MAIN_BLACKLIST = 9;
235     public final static int INITIAL_BLACKLIST = 10;
236     public final static int FINAL_BLACKLIST = 11;
237     public final static int DOMAIN_BLACKLIST = 12;
238     public final static int DOMAIN_INITIAL_BLACKLIST = 13;
239     public final static int DOMAIN_FINAL_BLACKLIST = 14;
240     public final static int DOMAIN_REGULAR_EXPRESSION_BLACKLIST = 15;
241     public final static int THIRD_PARTY_BLACKLIST = 16;
242     public final static int THIRD_PARTY_INITIAL_BLACKLIST = 17;
243     public final static int THIRD_PARTY_DOMAIN_BLACKLIST = 18;
244     public final static int THIRD_PARTY_DOMAIN_INITIAL_BLACKLIST = 19;
245     public final static int THIRD_PARTY_REGULAR_EXPRESSION_BLACKLIST = 20;
246     public final static int THIRD_PARTY_DOMAIN_REGULAR_EXPRESSION_BLACKLIST = 21;
247     public final static int REGULAR_EXPRESSION_BLACKLIST = 22;
248
249     // `blockAllThirdPartyRequests` is public static so it can be accessed from `RequestsActivity`.
250     // It is also used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`
251     public static boolean blockAllThirdPartyRequests;
252
253     // `currentBookmarksFolder` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onCreate()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`,
254     // `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
255     public static String currentBookmarksFolder;
256
257     // `domainSettingsDatabaseId` is public static so it can be accessed from `PinnedSslCertificateMismatchDialog`.  It is also used in `onCreate()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
258     public static int domainSettingsDatabaseId;
259
260     // The pinned domain SSL Certificate variables are public static so they can be accessed from `PinnedSslCertificateMismatchDialog`.  They are also used in `onCreate()` and `applyDomainSettings()`.
261     public static String pinnedDomainSslIssuedToCNameString;
262     public static String pinnedDomainSslIssuedToONameString;
263     public static String pinnedDomainSslIssuedToUNameString;
264     public static String pinnedDomainSslIssuedByCNameString;
265     public static String pinnedDomainSslIssuedByONameString;
266     public static String pinnedDomainSslIssuedByUNameString;
267     public static Date pinnedDomainSslStartDate;
268     public static Date pinnedDomainSslEndDate;
269
270     // The user agent constants are public static so they can be accessed from `SettingsFragment`, `DomainsActivity`, and `DomainSettingsFragment`.
271     public final static int UNRECOGNIZED_USER_AGENT = -1;
272     public final static int SETTINGS_WEBVIEW_DEFAULT_USER_AGENT = 1;
273     public final static int SETTINGS_CUSTOM_USER_AGENT = 12;
274     public final static int DOMAINS_SYSTEM_DEFAULT_USER_AGENT = 0;
275     public final static int DOMAINS_WEBVIEW_DEFAULT_USER_AGENT = 2;
276     public final static int DOMAINS_CUSTOM_USER_AGENT = 13;
277
278
279     // `appBar` is used in `onCreate()`, `onOptionsItemSelected()`, `closeFindOnPage()`, and `applyAppSettings()`.
280     private ActionBar appBar;
281
282     // `navigatingHistory` is used in `onCreate()`, `onNavigationItemSelected()`, `onSslMismatchBack()`, and `applyDomainSettings()`.
283     private boolean navigatingHistory;
284
285     // `favoriteIconDefaultBitmap` is used in `onCreate()` and `applyDomainSettings`.
286     private Bitmap favoriteIconDefaultBitmap;
287
288     // `drawerLayout` is used in `onCreate()`, `onNewIntent()`, `onBackPressed()`, and `onRestart()`.
289     private DrawerLayout drawerLayout;
290
291     // `rootCoordinatorLayout` is used in `onCreate()` and `applyAppSettings()`.
292     private CoordinatorLayout rootCoordinatorLayout;
293
294     // `mainWebView` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`,
295     // `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`, `onSslMismatchBack()`, and `setDisplayWebpageImages()`.
296     private WebView mainWebView;
297
298     // `fullScreenVideoFrameLayout` is used in `onCreate()` and `onConfigurationChanged()`.
299     private FrameLayout fullScreenVideoFrameLayout;
300
301     // `swipeRefreshLayout` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `onRestart()`.
302     private SwipeRefreshLayout swipeRefreshLayout;
303
304     // `urlAppBarRelativeLayout` is used in `onCreate()` and `applyDomainSettings()`.
305     private RelativeLayout urlAppBarRelativeLayout;
306
307     // `favoriteIconImageView` is used in `onCreate()` and `applyDomainSettings()`
308     private ImageView favoriteIconImageView;
309
310     // `cookieManager` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`, `loadUrlFromTextBox()`, `onDownloadImage()`, `onDownloadFile()`, and `onRestart()`.
311     private CookieManager cookieManager;
312
313     // `customHeader` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateContextMenu()`, and `loadUrl()`.
314     private final Map<String, String> customHeaders = new HashMap<>();
315
316     // `javaScriptEnabled` is also used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `applyDomainSettings()`, and `updatePrivacyIcons()`.
317     private boolean javaScriptEnabled;
318
319     // `firstPartyCookiesEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onDownloadImage()`, `onDownloadFile()`, and `applyDomainSettings()`.
320     private boolean firstPartyCookiesEnabled;
321
322     // `thirdPartyCookiesEnabled` used in `onCreate()`, `onPrepareOptionsMenu()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
323     private boolean thirdPartyCookiesEnabled;
324
325     // `domStorageEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
326     private boolean domStorageEnabled;
327
328     // `saveFormDataEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.  It can be removed once the minimum API >= 26.
329     private boolean saveFormDataEnabled;
330
331     // `nightMode` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and  `applyDomainSettings()`.
332     private boolean nightMode;
333
334     // `displayWebpageImagesBoolean` is used in `applyAppSettings()` and `applyDomainSettings()`.
335     private boolean displayWebpageImagesBoolean;
336
337     // 'homepage' is used in `onCreate()`, `onNavigationItemSelected()`, and `applyAppSettings()`.
338     private String homepage;
339
340     // `searchURL` is used in `loadURLFromTextBox()` and `applyAppSettings()`.
341     private String searchURL;
342
343     // `mainMenu` is used in `onCreateOptionsMenu()` and `updatePrivacyIcons()`.
344     private Menu mainMenu;
345
346     // `refreshMenuItem` is used in `onCreate()` and `onCreateOptionsMenu()`.
347     private MenuItem refreshMenuItem;
348
349     // The blocklist menu items are used in `onCreate()`, `onCreateOptionsMenu()`, and `onPrepareOptionsMenu()`.
350     private MenuItem blocklistsMenuItem;
351     private MenuItem easyListMenuItem;
352     private MenuItem easyPrivacyMenuItem;
353     private MenuItem fanboysAnnoyanceListMenuItem;
354     private MenuItem fanboysSocialBlockingListMenuItem;
355     private MenuItem ultraPrivacyMenuItem;
356     private MenuItem blockAllThirdPartyRequestsMenuItem;
357
358     // The blocklist variables are used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
359     private boolean easyListEnabled;
360     private boolean easyPrivacyEnabled;
361     private boolean fanboysAnnoyanceListEnabled;
362     private boolean fanboysSocialBlockingListEnabled;
363     private boolean ultraPrivacyEnabled;
364
365     // `webViewDefaultUserAgent` is used in `onCreate()` and `onPrepareOptionsMenu()`.
366     private String webViewDefaultUserAgent;
367
368     // `defaultCustomUserAgentString` is used in `onPrepareOptionsMenu()` and `applyDomainSettings()`.
369     private String defaultCustomUserAgentString;
370
371     // `privacyBrowserRuntime` is used in `onCreate()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
372     private Runtime privacyBrowserRuntime;
373
374     // `proxyThroughOrbot` is used in `onRestart()` and `applyAppSettings()`.
375     private boolean proxyThroughOrbot;
376
377     // `incognitoModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
378     private boolean incognitoModeEnabled;
379
380     // `fullScreenBrowsingModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
381     private boolean fullScreenBrowsingModeEnabled;
382
383     // `inFullScreenBrowsingMode` is used in `onCreate()`, `onConfigurationChanged()`, and `applyAppSettings()`.
384     private boolean inFullScreenBrowsingMode;
385
386     // `hideSystemBarsOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
387     private boolean hideSystemBarsOnFullscreen;
388
389     // `translucentNavigationBarOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
390     private boolean translucentNavigationBarOnFullscreen;
391
392     // `reapplyDomainSettingsOnRestart` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, and `onAddDomain()`, .
393     private boolean reapplyDomainSettingsOnRestart;
394
395     // `reapplyAppSettingsOnRestart` is used in `onNavigationItemSelected()` and `onRestart()`.
396     private boolean reapplyAppSettingsOnRestart;
397
398     // `displayingFullScreenVideo` is used in `onCreate()` and `onResume()`.
399     private boolean displayingFullScreenVideo;
400
401     // `currentDomainName` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onAddDomain()`, and `applyDomainSettings()`.
402     private String currentDomainName;
403
404     // `ignorePinnedSslCertificateForDomain` is used in `onCreate()`, `onSslMismatchProceed()`, and `applyDomainSettings()`.
405     private boolean ignorePinnedSslCertificate;
406
407     // `orbotStatusBroadcastReceiver` is used in `onCreate()` and `onDestroy()`.
408     private BroadcastReceiver orbotStatusBroadcastReceiver;
409
410     // `waitingForOrbot` is used in `onCreate()`, `onResume()`, and `applyAppSettings()`.
411     private boolean waitingForOrbot;
412
413     // `domainSettingsApplied` is used in `prepareOptionsMenu()`, `applyDomainSettings()`, and `setDisplayWebpageImages()`.
414     private boolean domainSettingsApplied;
415
416     // `domainSettingsJavaScriptEnabled` is used in `onOptionsItemSelected()` and `applyDomainSettings()`.
417     private Boolean domainSettingsJavaScriptEnabled;
418
419     // `displayWebpageImagesInt` is used in `applyDomainSettings()` and `setDisplayWebpageImages()`.
420     private int displayWebpageImagesInt;
421
422     // `onTheFlyDisplayImagesSet` is used in `applyDomainSettings()` and `setDisplayWebpageImages()`.
423     private boolean onTheFlyDisplayImagesSet;
424
425     // `waitingForOrbotData` is used in `onCreate()` and `applyAppSettings()`.
426     private String waitingForOrbotHTMLString;
427
428     // `privateDataDirectoryString` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`.
429     private String privateDataDirectoryString;
430
431     // `findOnPageLinearLayout` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
432     private LinearLayout findOnPageLinearLayout;
433
434     // `findOnPageEditText` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
435     private EditText findOnPageEditText;
436
437     // `displayAdditionalAppBarIcons` is used in `onCreate()` and `onCreateOptionsMenu()`.
438     private boolean displayAdditionalAppBarIcons;
439
440     // `drawerToggle` is used in `onCreate()`, `onPostCreate()`, `onConfigurationChanged()`, `onNewIntent()`, and `onNavigationItemSelected()`.
441     private ActionBarDrawerToggle drawerToggle;
442
443     // `supportAppBar` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
444     private Toolbar supportAppBar;
445
446     // `urlTextBox` is used in `onCreate()`, `onOptionsItemSelected()`, `loadUrlFromTextBox()`, `loadUrl()`, and `highlightUrlText()`.
447     private EditText urlTextBox;
448
449     // The color spans are used in `onCreate()` and `highlightUrlText()`.
450     private ForegroundColorSpan redColorSpan;
451     private ForegroundColorSpan initialGrayColorSpan;
452     private ForegroundColorSpan finalGrayColorSpan;
453
454     // `sslErrorHandler` is used in `onCreate()`, `onSslErrorCancel()`, and `onSslErrorProceed`.
455     private SslErrorHandler sslErrorHandler;
456
457     // `httpAuthHandler` is used in `onCreate()`, `onHttpAuthenticationCancel()`, and `onHttpAuthenticationProceed()`.
458     private static HttpAuthHandler httpAuthHandler;
459
460     // `inputMethodManager` is used in `onOptionsItemSelected()`, `loadUrlFromTextBox()`, and `closeFindOnPage()`.
461     private InputMethodManager inputMethodManager;
462
463     // `mainWebViewRelativeLayout` is used in `onCreate()` and `onNavigationItemSelected()`.
464     private RelativeLayout mainWebViewRelativeLayout;
465
466     // `urlIsLoading` is used in `onCreate()`, `onCreateOptionsMenu()`, `loadUrl()`, and `applyDomainSettings()`.
467     private boolean urlIsLoading;
468
469     // `pinnedDomainSslCertificate` is used in `onCreate()` and `applyDomainSettings()`.
470     private boolean pinnedDomainSslCertificate;
471
472     // `bookmarksDatabaseHelper` is used in `onCreate()`, `onDestroy`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`,
473     // and `loadBookmarksFolder()`.
474     private BookmarksDatabaseHelper bookmarksDatabaseHelper;
475
476     // `bookmarksListView` is used in `onCreate()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, and `loadBookmarksFolder()`.
477     private ListView bookmarksListView;
478
479     // `bookmarksTitleTextView` is used in `onCreate()` and `loadBookmarksFolder()`.
480     private TextView bookmarksTitleTextView;
481
482     // `bookmarksCursor` is used in `onDestroy()`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
483     private Cursor bookmarksCursor;
484
485     // `bookmarksCursorAdapter` is used in `onCreateBookmark()`, `onCreateBookmarkFolder()` `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
486     private CursorAdapter bookmarksCursorAdapter;
487
488     // `oldFolderNameString` is used in `onCreate()` and `onSaveEditBookmarkFolder()`.
489     private String oldFolderNameString;
490
491     // `fileChooserCallback` is used in `onCreate()` and `onActivityResult()`.
492     private ValueCallback<Uri[]> fileChooserCallback;
493
494     // The download strings are used in `onCreate()` and `onRequestPermissionResult()`.
495     private String downloadUrl;
496     private String downloadContentDisposition;
497     private long downloadContentLength;
498
499     // `downloadImageUrl` is used in `onCreateContextMenu()` and `onRequestPermissionResult()`.
500     private String downloadImageUrl;
501
502     // The user agent variables are used in `onCreate()` and `applyDomainSettings()`.
503     private ArrayAdapter<CharSequence> userAgentNamesArray;
504     private String[] userAgentDataArray;
505
506     // The request codes are used in `onCreate()`, `onCreateContextMenu()`, `onCloseDownloadLocationPermissionDialog()`, and `onRequestPermissionResult()`.
507     private final int DOWNLOAD_FILE_REQUEST_CODE = 1;
508     private final int DOWNLOAD_IMAGE_REQUEST_CODE = 2;
509
510     @Override
511     // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.  The whole premise of Privacy Browser is built around an understanding of these dangers.
512     // Also, remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
513     @SuppressLint({"SetJavaScriptEnabled", "ClickableViewAccessibility"})
514     // Remove Android Studio's warning about deprecations.  We have to use the deprecated `getColor()` until API >= 23.
515     @SuppressWarnings("deprecation")
516     protected void onCreate(Bundle savedInstanceState) {
517         // Get a handle for the shared preferences.
518         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
519
520         // Get the theme and screenshot preferences.
521         darkTheme = sharedPreferences.getBoolean("dark_theme", false);
522         allowScreenshots = sharedPreferences.getBoolean("allow_screenshots", false);
523
524         // Disable screenshots if not allowed.
525         if (!allowScreenshots) {
526             getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
527         }
528
529         // Set the activity theme.
530         if (darkTheme) {
531             setTheme(R.style.PrivacyBrowserDark);
532         } else {
533             setTheme(R.style.PrivacyBrowserLight);
534         }
535
536         // Run the default commands.
537         super.onCreate(savedInstanceState);
538
539         // Set the content view.
540         setContentView(R.layout.main_drawerlayout);
541
542         // Get a handle for `inputMethodManager`.
543         inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
544
545         // `SupportActionBar` from `android.support.v7.app.ActionBar` must be used until the minimum API is >= 21.
546         supportAppBar = findViewById(R.id.app_bar);
547         setSupportActionBar(supportAppBar);
548         appBar = getSupportActionBar();
549
550         // This is needed to get rid of the Android Studio warning that `appBar` might be null.
551         assert appBar != null;
552
553         // Add the custom `url_app_bar` layout, which shows the favorite icon and the URL text bar.
554         appBar.setCustomView(R.layout.url_app_bar);
555         appBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
556
557         // Initialize the foreground color spans for highlighting the URLs.  We have to use the deprecated `getColor()` until API >= 23.
558         redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_a700));
559         initialGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
560         finalGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
561
562         // Get a handle for `urlTextBox`.
563         urlTextBox = findViewById(R.id.url_edittext);
564
565         // Remove the formatting from `urlTextBar` when the user is editing the text.
566         urlTextBox.setOnFocusChangeListener((View v, boolean hasFocus) -> {
567             if (hasFocus) {  // The user is editing `urlTextBox`.
568                 // Remove the highlighting.
569                 urlTextBox.getText().removeSpan(redColorSpan);
570                 urlTextBox.getText().removeSpan(initialGrayColorSpan);
571                 urlTextBox.getText().removeSpan(finalGrayColorSpan);
572             } else {  // The user has stopped editing `urlTextBox`.
573                 // Reapply the highlighting.
574                 highlightUrlText();
575             }
576         });
577
578         // Set the go button on the keyboard to load the URL in `urlTextBox`.
579         urlTextBox.setOnKeyListener((View v, int keyCode, KeyEvent event) -> {
580             // If the event is a key-down event on the `enter` button, load the URL.
581             if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {
582                 // Load the URL into the mainWebView and consume the event.
583                 try {
584                     loadUrlFromTextBox();
585                 } catch (UnsupportedEncodingException e) {
586                     e.printStackTrace();
587                 }
588                 // If the enter key was pressed, consume the event.
589                 return true;
590             } else {
591                 // If any other key was pressed, do not consume the event.
592                 return false;
593             }
594         });
595
596         // Set `waitingForOrbotHTMLString`.
597         waitingForOrbotHTMLString = "<html><body><br/><center><h1>" + getString(R.string.waiting_for_orbot) + "</h1></center></body></html>";
598
599         // Initialize `currentDomainName`, `orbotStatus`, and `waitingForOrbot`.
600         currentDomainName = "";
601         orbotStatus = "unknown";
602         waitingForOrbot = false;
603
604         // Create an Orbot status `BroadcastReceiver`.
605         orbotStatusBroadcastReceiver = new BroadcastReceiver() {
606             @Override
607             public void onReceive(Context context, Intent intent) {
608                 // Store the content of the status message in `orbotStatus`.
609                 orbotStatus = intent.getStringExtra("org.torproject.android.intent.extra.STATUS");
610
611                 // If Privacy Browser is waiting on Orbot, load the website now that Orbot is connected.
612                 if (orbotStatus.equals("ON") && waitingForOrbot) {
613                     // Reset `waitingForOrbot`.
614                     waitingForOrbot = false;
615
616                     // Load `formattedUrlString
617                     loadUrl(formattedUrlString);
618                 }
619             }
620         };
621
622         // Register `orbotStatusBroadcastReceiver` on `this` context.
623         this.registerReceiver(orbotStatusBroadcastReceiver, new IntentFilter("org.torproject.android.intent.action.STATUS"));
624
625         // Get handles for views that need to be accessed.
626         drawerLayout = findViewById(R.id.drawerlayout);
627         rootCoordinatorLayout = findViewById(R.id.root_coordinatorlayout);
628         bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
629         bookmarksTitleTextView = findViewById(R.id.bookmarks_title_textview);
630         FloatingActionButton launchBookmarksActivityFab = findViewById(R.id.launch_bookmarks_activity_fab);
631         FloatingActionButton createBookmarkFolderFab = findViewById(R.id.create_bookmark_folder_fab);
632         FloatingActionButton createBookmarkFab = findViewById(R.id.create_bookmark_fab);
633         mainWebViewRelativeLayout = findViewById(R.id.main_webview_relativelayout);
634         mainWebView = findViewById(R.id.main_webview);
635         findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
636         findOnPageEditText = findViewById(R.id.find_on_page_edittext);
637         fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
638         urlAppBarRelativeLayout = findViewById(R.id.url_app_bar_relativelayout);
639         favoriteIconImageView = findViewById(R.id.favorite_icon);
640
641         // 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.
642         if (darkTheme) {
643             launchBookmarksActivityFab.setImageDrawable(getResources().getDrawable(R.drawable.bookmarks_dark));
644             createBookmarkFolderFab.setImageDrawable(getResources().getDrawable(R.drawable.create_folder_dark));
645             createBookmarkFab.setImageDrawable(getResources().getDrawable(R.drawable.create_bookmark_dark));
646             bookmarksListView.setBackgroundColor(getResources().getColor(R.color.gray_850));
647         } else {
648             launchBookmarksActivityFab.setImageDrawable(getResources().getDrawable(R.drawable.bookmarks_light));
649             createBookmarkFolderFab.setImageDrawable(getResources().getDrawable(R.drawable.create_folder_light));
650             createBookmarkFab.setImageDrawable(getResources().getDrawable(R.drawable.create_bookmark_light));
651             bookmarksListView.setBackgroundColor(getResources().getColor(R.color.white));
652         }
653
654         // Set the launch bookmarks activity FAB to launch the bookmarks activity.
655         launchBookmarksActivityFab.setOnClickListener(v -> {
656             // Create an intent to launch the bookmarks activity.
657             Intent bookmarksIntent = new Intent(getApplicationContext(), BookmarksActivity.class);
658
659             // Include the current folder with the `Intent`.
660             bookmarksIntent.putExtra("Current Folder", currentBookmarksFolder);
661
662             // Make it so.
663             startActivity(bookmarksIntent);
664         });
665
666         // Set the create new bookmark folder FAB to display an alert dialog.
667         createBookmarkFolderFab.setOnClickListener(v -> {
668             // Show the `CreateBookmarkFolderDialog` `AlertDialog` and name the instance `@string/create_folder`.
669             AppCompatDialogFragment createBookmarkFolderDialog = new CreateBookmarkFolderDialog();
670             createBookmarkFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_folder));
671         });
672
673         // Set the create new bookmark FAB to display an alert dialog.
674         createBookmarkFab.setOnClickListener(view -> {
675             // Show the `CreateBookmarkDialog` `AlertDialog` and name the instance `@string/create_bookmark`.
676             AppCompatDialogFragment createBookmarkDialog = new CreateBookmarkDialog();
677             createBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_bookmark));
678         });
679
680         // Create a double-tap listener to toggle full-screen mode.
681         final GestureDetector gestureDetector = new GestureDetector(this, new GestureDetector.SimpleOnGestureListener() {
682             // Override `onDoubleTap()`.  All other events are handled using the default settings.
683             @Override
684             public boolean onDoubleTap(MotionEvent event) {
685                 if (fullScreenBrowsingModeEnabled) {  // Only process the double-tap if full screen browsing mode is enabled.
686                     // Toggle `inFullScreenBrowsingMode`.
687                     inFullScreenBrowsingMode = !inFullScreenBrowsingMode;
688
689                     if (inFullScreenBrowsingMode) {  // Switch to full screen mode.
690                         // Hide the `appBar`.
691                         appBar.hide();
692
693                         // Hide the banner ad in the free flavor.
694                         if (BuildConfig.FLAVOR.contentEquals("free")) {
695                             // The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
696                             AdHelper.hideAd(findViewById(R.id.adview));
697                         }
698
699                         // Modify the system bars.
700                         if (hideSystemBarsOnFullscreen) {  // Hide everything.
701                             // Remove the translucent overlays.
702                             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
703
704                             // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
705                             drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
706
707                             /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
708                              * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
709                              * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
710                              */
711                             rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
712
713                             // Set `rootCoordinatorLayout` to fill the whole screen.
714                             rootCoordinatorLayout.setFitsSystemWindows(false);
715                         } else {  // Hide everything except the status and navigation bars.
716                             // Set `rootCoordinatorLayout` to fit under the status and navigation bars.
717                             rootCoordinatorLayout.setFitsSystemWindows(false);
718
719                             // 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.
720                             if (translucentNavigationBarOnFullscreen) {
721                                 // Set the navigation bar to be translucent.
722                                 getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
723                             }
724                         }
725                     } else {  // Switch to normal viewing mode.
726                         // Show the `appBar`.
727                         appBar.show();
728
729                         // Show the `BannerAd` in the free flavor.
730                         if (BuildConfig.FLAVOR.contentEquals("free")) {
731                             // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
732                             AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
733                         }
734
735                         // Remove the translucent navigation bar flag if it is set.
736                         getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
737
738                         // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
739                         getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
740
741                         // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
742                         rootCoordinatorLayout.setSystemUiVisibility(0);
743
744                         // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
745                         rootCoordinatorLayout.setFitsSystemWindows(true);
746                     }
747
748                     // Consume the double-tap.
749                     return true;
750                 } else { // Do not consume the double-tap because full screen browsing mode is disabled.
751                     return false;
752                 }
753             }
754         });
755
756         // Pass all touch events on `mainWebView` through `gestureDetector` to check for double-taps.
757         mainWebView.setOnTouchListener((View v, MotionEvent event) -> {
758             // Call `performClick()` on the view, which is required for accessibility.
759             v.performClick();
760
761             // Send the `event` to `gestureDetector`.
762             return gestureDetector.onTouchEvent(event);
763         });
764
765         // Update `findOnPageCountTextView`.
766         mainWebView.setFindListener(new WebView.FindListener() {
767             // Get a handle for `findOnPageCountTextView`.
768             final TextView findOnPageCountTextView = (TextView) findViewById(R.id.find_on_page_count_textview);
769
770             @Override
771             public void onFindResultReceived(int activeMatchOrdinal, int numberOfMatches, boolean isDoneCounting) {
772                 if ((isDoneCounting) && (numberOfMatches == 0)) {  // There are no matches.
773                     // Set `findOnPageCountTextView` to `0/0`.
774                     findOnPageCountTextView.setText(R.string.zero_of_zero);
775                 } else if (isDoneCounting) {  // There are matches.
776                     // `activeMatchOrdinal` is zero-based.
777                     int activeMatch = activeMatchOrdinal + 1;
778
779                     // Build the match string.
780                     String matchString = activeMatch + "/" + numberOfMatches;
781
782                     // Set `findOnPageCountTextView`.
783                     findOnPageCountTextView.setText(matchString);
784                 }
785             }
786         });
787
788         // Search for the string on the page whenever a character changes in the `findOnPageEditText`.
789         findOnPageEditText.addTextChangedListener(new TextWatcher() {
790             @Override
791             public void beforeTextChanged(CharSequence s, int start, int count, int after) {
792                 // Do nothing.
793             }
794
795             @Override
796             public void onTextChanged(CharSequence s, int start, int before, int count) {
797                 // Do nothing.
798             }
799
800             @Override
801             public void afterTextChanged(Editable s) {
802                 // Search for the text in `mainWebView`.
803                 mainWebView.findAllAsync(findOnPageEditText.getText().toString());
804             }
805         });
806
807         // Set the `check mark` button for the `findOnPageEditText` keyboard to close the soft keyboard.
808         findOnPageEditText.setOnKeyListener((v, keyCode, event) -> {
809             if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {  // The `enter` key was pressed.
810                 // Hide the soft keyboard.  `0` indicates no additional flags.
811                 inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
812
813                 // Consume the event.
814                 return true;
815             } else {  // A different key was pressed.
816                 // Do not consume the event.
817                 return false;
818             }
819         });
820
821         // Implement swipe to refresh
822         swipeRefreshLayout = findViewById(R.id.swipe_refreshlayout);
823         swipeRefreshLayout.setColorSchemeResources(R.color.blue_700);
824         swipeRefreshLayout.setOnRefreshListener(() -> mainWebView.reload());
825
826         // `DrawerTitle` identifies the `DrawerLayouts` in accessibility mode.
827         drawerLayout.setDrawerTitle(GravityCompat.START, getString(R.string.navigation_drawer));
828         drawerLayout.setDrawerTitle(GravityCompat.END, getString(R.string.bookmarks));
829
830         // Listen for touches on the navigation menu.
831         final NavigationView navigationView = findViewById(R.id.navigationview);
832         navigationView.setNavigationItemSelectedListener(this);
833
834         // 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.
835         final Menu navigationMenu = navigationView.getMenu();
836         final MenuItem navigationBackMenuItem = navigationMenu.getItem(1);
837         final MenuItem navigationForwardMenuItem = navigationMenu.getItem(2);
838         final MenuItem navigationHistoryMenuItem = navigationMenu.getItem(3);
839         final MenuItem navigationRequestsMenuItem = navigationMenu.getItem(4);
840
841         // Initialize the bookmarks database helper.  `this` specifies the context.  The two `nulls` do not specify the database name or a `CursorFactory`.
842         // The `0` specifies a database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
843         bookmarksDatabaseHelper = new BookmarksDatabaseHelper(this, null, null, 0);
844
845         // Initialize `currentBookmarksFolder`.  `""` is the home folder in the database.
846         currentBookmarksFolder = "";
847
848         // Load the home folder, which is `""` in the database.
849         loadBookmarksFolder();
850
851         bookmarksListView.setOnItemClickListener((parent, view, position, id) -> {
852             // Convert the id from long to int to match the format of the bookmarks database.
853             int databaseID = (int) id;
854
855             // Get the bookmark cursor for this ID and move it to the first row.
856             Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmarkCursor(databaseID);
857             bookmarkCursor.moveToFirst();
858
859             // Act upon the bookmark according to the type.
860             if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {  // The selected bookmark is a folder.
861                 // Store the new folder name in `currentBookmarksFolder`.
862                 currentBookmarksFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
863
864                 // Load the new folder.
865                 loadBookmarksFolder();
866             } else {  // The selected bookmark is not a folder.
867                 // Load the bookmark URL.
868                 loadUrl(bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL)));
869
870                 // Close the bookmarks drawer.
871                 drawerLayout.closeDrawer(GravityCompat.END);
872             }
873
874             // Close the `Cursor`.
875             bookmarkCursor.close();
876         });
877
878         bookmarksListView.setOnItemLongClickListener((parent, view, position, id) -> {
879             // Convert the database ID from `long` to `int`.
880             int databaseId = (int) id;
881
882             // Find out if the selected bookmark is a folder.
883             boolean isFolder = bookmarksDatabaseHelper.isFolder(databaseId);
884
885             if (isFolder) {
886                 // Save the current folder name, which is used in `onSaveEditBookmarkFolder()`.
887                 oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
888
889                 // Show the edit bookmark folder `AlertDialog` and name the instance `@string/edit_folder`.
890                 AppCompatDialogFragment editFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId);
891                 editFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_folder));
892             } else {
893                 // Show the edit bookmark `AlertDialog` and name the instance `@string/edit_bookmark`.
894                 AppCompatDialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId);
895                 editBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_bookmark));
896             }
897
898             // Consume the event.
899             return true;
900         });
901
902         // The drawer listener is used to update the navigation menu.
903         drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
904             @Override
905             public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
906             }
907
908             @Override
909             public void onDrawerOpened(@NonNull View drawerView) {
910             }
911
912             @Override
913             public void onDrawerClosed(@NonNull View drawerView) {
914             }
915
916             @Override
917             public void onDrawerStateChanged(int newState) {
918                 if ((newState == DrawerLayout.STATE_SETTLING) || (newState == DrawerLayout.STATE_DRAGGING)) {  // A drawer is opening or closing.
919                     // Update the back, forward, history, and requests menu items.
920                     navigationBackMenuItem.setEnabled(mainWebView.canGoBack());
921                     navigationForwardMenuItem.setEnabled(mainWebView.canGoForward());
922                     navigationHistoryMenuItem.setEnabled((mainWebView.canGoBack() || mainWebView.canGoForward()));
923                     navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
924
925                     // Hide the keyboard (if displayed).
926                     inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
927
928                     // Clear the focus from from the URL text box.
929                     urlTextBox.clearFocus();
930                 }
931             }
932         });
933
934         // drawerToggle creates the hamburger icon at the start of the AppBar.
935         drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, supportAppBar, R.string.open_navigation_drawer, R.string.close_navigation_drawer);
936
937         // Get a handle for the progress bar.
938         final ProgressBar progressBar = findViewById(R.id.progress_bar);
939
940         mainWebView.setWebChromeClient(new WebChromeClient() {
941             // Update the progress bar when a page is loading.
942             @Override
943             public void onProgressChanged(WebView view, int progress) {
944                 // Inject the night mode CSS if night mode is enabled.
945                 if (nightMode) {
946                     // `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
947                     // used by WordPress.  `text-decoration: none` removes all text underlines.  `text-shadow: none` removes text shadows, which usually have a hard coded color.
948                     // `border: none` removes all borders, which can also be used to underline text.
949                     // `a {color: #1565C0}` sets links to be a dark blue.  `!important` takes precedent over any existing sub-settings.
950                     mainWebView.evaluateJavascript("(function() {var parent = document.getElementsByTagName('head').item(0); var style = document.createElement('style'); style.type = 'text/css'; " +
951                             "style.innerHTML = '* {background-color: #212121 !important; color: #BDBDBD !important; box-shadow: none !important; text-decoration: none !important;" +
952                             "text-shadow: none !important; border: none !important;} a {color: #1565C0 !important;}'; parent.appendChild(style)})()", value -> {
953                                 // Initialize a handler to display `mainWebView`.
954                                 Handler displayWebViewHandler = new Handler();
955
956                                 // Setup a runnable to display `mainWebView` after a delay to allow the CSS to be applied.
957                                 Runnable displayWebViewRunnable = () -> {
958                                     // Only display `mainWebView` if the progress bar is one.  This prevents the display of the `WebView` while it is still loading.
959                                     if (progressBar.getVisibility() == View.GONE) {
960                                         mainWebView.setVisibility(View.VISIBLE);
961                                     }
962                                 };
963
964                                 // Displaying of `mainWebView` after 500 milliseconds.
965                                 displayWebViewHandler.postDelayed(displayWebViewRunnable, 500);
966                             });
967                 }
968
969                 // Update the progress bar.
970                 progressBar.setProgress(progress);
971
972                 // Set the visibility of the progress bar.
973                 if (progress < 100) {
974                     // Show the progress bar.
975                     progressBar.setVisibility(View.VISIBLE);
976                 } else {
977                     // Hide the progress bar.
978                     progressBar.setVisibility(View.GONE);
979
980                     // Display `mainWebView` if night mode is disabled.
981                     // 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
982                     // currently enabled.
983                     if (!nightMode) {
984                         mainWebView.setVisibility(View.VISIBLE);
985                     }
986
987                     //Stop the swipe to refresh indicator if it is running
988                     swipeRefreshLayout.setRefreshing(false);
989                 }
990             }
991
992             // Set the favorite icon when it changes.
993             @Override
994             public void onReceivedIcon(WebView view, Bitmap icon) {
995                 // Only update the favorite icon if the website has finished loading.
996                 if (progressBar.getVisibility() == View.GONE) {
997                     // Save a copy of the favorite icon.
998                     favoriteIconBitmap = icon;
999
1000                     // Place the favorite icon in the appBar.
1001                     favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
1002                 }
1003             }
1004
1005             // Save a copy of the title when it changes.
1006             @Override
1007             public void onReceivedTitle(WebView view, String title) {
1008                 // Save a copy of the title.
1009                 webViewTitle = title;
1010             }
1011
1012             // Enter full screen video.
1013             @Override
1014             public void onShowCustomView(View view, CustomViewCallback callback) {
1015                 // Set the full screen video flag.
1016                 displayingFullScreenVideo = true;
1017
1018                 // Pause the ad if this is the free flavor.
1019                 if (BuildConfig.FLAVOR.contentEquals("free")) {
1020                     // The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
1021                     AdHelper.pauseAd(findViewById(R.id.adview));
1022                 }
1023
1024                 // Remove the translucent overlays.
1025                 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
1026
1027                 // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
1028                 drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
1029
1030                 /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
1031                  * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
1032                  * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
1033                  */
1034                 rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
1035
1036                 // Set `rootCoordinatorLayout` to fill the entire screen.
1037                 rootCoordinatorLayout.setFitsSystemWindows(false);
1038
1039                 // Disable the sliding drawers.
1040                 drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
1041
1042                 // Add `view` to `fullScreenVideoFrameLayout` and display it on the screen.
1043                 fullScreenVideoFrameLayout.addView(view);
1044                 fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
1045             }
1046
1047             // Exit full screen video.
1048             @Override
1049             public void onHideCustomView() {
1050                 // Unset the full screen video flag.
1051                 displayingFullScreenVideo = false;
1052
1053                 // Hide `fullScreenVideoFrameLayout`.
1054                 fullScreenVideoFrameLayout.removeAllViews();
1055                 fullScreenVideoFrameLayout.setVisibility(View.GONE);
1056
1057                 // Enable the sliding drawers.
1058                 drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
1059
1060                 // Apply the appropriate full screen mode the `SYSTEM_UI` flags.
1061                 if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
1062                     if (hideSystemBarsOnFullscreen) {  // Hide everything.
1063                         // Remove the translucent navigation setting if it is currently flagged.
1064                         getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
1065
1066                         // Remove the translucent status bar overlay.
1067                         getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
1068
1069                         // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
1070                         drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
1071
1072                         /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
1073                          * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
1074                          * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
1075                          */
1076                         rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
1077                     } else {  // Hide everything except the status and navigation bars.
1078                         // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
1079                         rootCoordinatorLayout.setSystemUiVisibility(0);
1080
1081                         // Add the translucent status flag if it is unset.
1082                         getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
1083
1084                         if (translucentNavigationBarOnFullscreen) {
1085                             // Set the navigation bar to be translucent.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
1086                             getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
1087                         } else {
1088                             // Set the navigation bar to be black.
1089                             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
1090                         }
1091                     }
1092                 } else {  // Switch to normal viewing mode.
1093                     // Show the `appBar` if `findOnPageLinearLayout` is not visible.
1094                     if (findOnPageLinearLayout.getVisibility() == View.GONE) {
1095                         appBar.show();
1096                     }
1097
1098                     // Show the `BannerAd` in the free flavor.
1099                     if (BuildConfig.FLAVOR.contentEquals("free")) {
1100                         // Initialize the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
1101                         AdHelper.initializeAds(findViewById(R.id.adview), getApplicationContext(), getFragmentManager(), getString(R.string.google_app_id), getString(R.string.ad_unit_id));
1102                     }
1103
1104                     // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
1105                     rootCoordinatorLayout.setSystemUiVisibility(0);
1106
1107                     // Remove the translucent navigation bar flag if it is set.
1108                     getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
1109
1110                     // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
1111                     getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
1112
1113                     // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
1114                     rootCoordinatorLayout.setFitsSystemWindows(true);
1115                 }
1116
1117                 // Show the ad if this is the free flavor.
1118                 if (BuildConfig.FLAVOR.contentEquals("free")) {
1119                     // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
1120                     AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
1121                 }
1122             }
1123
1124             // Upload files.
1125             @Override
1126             public boolean onShowFileChooser(WebView webView, ValueCallback<Uri[]> filePathCallback, FileChooserParams fileChooserParams) {
1127                 // Show the file chooser if the device is running API >= 21.
1128                 if (Build.VERSION.SDK_INT >= 21) {
1129                     // Store the file path callback.
1130                     fileChooserCallback = filePathCallback;
1131
1132                     // Create an intent to open a chooser based ont the file chooser parameters.
1133                     Intent fileChooserIntent = fileChooserParams.createIntent();
1134
1135                     // Open the file chooser.  Currently only one `startActivityForResult` exists in this activity, so the request code, used to differentiate them, is simply `0`.
1136                     startActivityForResult(fileChooserIntent, 0);
1137                 }
1138                 return true;
1139             }
1140         });
1141
1142         // Register `mainWebView` for a context menu.  This is used to see link targets and download images.
1143         registerForContextMenu(mainWebView);
1144
1145         // Allow the downloading of files.
1146         mainWebView.setDownloadListener((String url, String userAgent, String contentDisposition, String mimetype, long contentLength) -> {
1147             // Check to see if the WRITE_EXTERNAL_STORAGE permission has already been granted.
1148             if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {
1149                 // The WRITE_EXTERNAL_STORAGE permission needs to be requested.
1150
1151                 // Store the variables for future use by `onRequestPermissionsResult()`.
1152                 downloadUrl = url;
1153                 downloadContentDisposition = contentDisposition;
1154                 downloadContentLength = contentLength;
1155
1156                 // Show a dialog if the user has previously denied the permission.
1157                 if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
1158                     // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_FILE.
1159                     DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_FILE);
1160
1161                     // Show the download location permission alert dialog.  The permission will be requested when the the dialog is closed.
1162                     downloadLocationPermissionDialogFragment.show(getFragmentManager(), getString(R.string.download_location));
1163                 } else {  // Show the permission request directly.
1164                     // Request the permission.  The download dialog will be launched by `onRequestPermissionResult()`.
1165                     ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
1166                 }
1167             } else {  // The storage permission has already been granted.
1168                 // Get a handle for the download file alert dialog.
1169                 AppCompatDialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(url, contentDisposition, contentLength);
1170
1171                 // Show the download file alert dialog.
1172                 downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
1173             }
1174         });
1175
1176         // Allow pinch to zoom.
1177         mainWebView.getSettings().setBuiltInZoomControls(true);
1178
1179         // Hide zoom controls.
1180         mainWebView.getSettings().setDisplayZoomControls(false);
1181
1182         // Set `mainWebView` to use a wide viewport.  Otherwise, some web pages will be scrunched and some content will render outside the screen.
1183         mainWebView.getSettings().setUseWideViewPort(true);
1184
1185         // Set `mainWebView` to load in overview mode (zoomed out to the maximum width).
1186         mainWebView.getSettings().setLoadWithOverviewMode(true);
1187
1188         // Explicitly disable geolocation.
1189         mainWebView.getSettings().setGeolocationEnabled(false);
1190
1191         // Initialize cookieManager.
1192         cookieManager = CookieManager.getInstance();
1193
1194         // 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).
1195         customHeaders.put("X-Requested-With", "");
1196
1197         // Initialize the default preference values the first time the program is run.  `false` keeps this command from resetting any current preferences back to default.
1198         PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
1199
1200         // Get the intent that started the app.
1201         final Intent launchingIntent = getIntent();
1202
1203         // Extract the launching intent data as `launchingIntentUriData`.
1204         final Uri launchingIntentUriData = launchingIntent.getData();
1205
1206         // Convert the launching intent URI data (if it exists) to a string and store it in `formattedUrlString`.
1207         if (launchingIntentUriData != null) {
1208             formattedUrlString = launchingIntentUriData.toString();
1209         }
1210
1211         // Get a handle for the `Runtime`.
1212         privacyBrowserRuntime = Runtime.getRuntime();
1213
1214         // Store the application's private data directory.
1215         privateDataDirectoryString = getApplicationInfo().dataDir;
1216         // `dataDir` will vary, but will be something like `/data/user/0/com.stoutner.privacybrowser.standard`, which links to `/data/data/com.stoutner.privacybrowser.standard`.
1217
1218         // Initialize `inFullScreenBrowsingMode`, which is always false at this point because Privacy Browser never starts in full screen browsing mode.
1219         inFullScreenBrowsingMode = false;
1220
1221         // Initialize the privacy settings variables.
1222         javaScriptEnabled = false;
1223         firstPartyCookiesEnabled = false;
1224         thirdPartyCookiesEnabled = false;
1225         domStorageEnabled = false;
1226         saveFormDataEnabled = false;  // Form data can be removed once the minimum API >= 26.
1227         nightMode = false;
1228
1229         // Store the default user agent.
1230         webViewDefaultUserAgent = mainWebView.getSettings().getUserAgentString();
1231
1232         // Initialize the WebView title.
1233         webViewTitle = getString(R.string.no_title);
1234
1235         // Initialize the favorite icon bitmap.  `ContextCompat` must be used until API >= 21.
1236         Drawable favoriteIconDrawable = ContextCompat.getDrawable(getApplicationContext(), R.drawable.world);
1237         BitmapDrawable favoriteIconBitmapDrawable = (BitmapDrawable) favoriteIconDrawable;
1238         assert favoriteIconBitmapDrawable != null;
1239         favoriteIconDefaultBitmap = favoriteIconBitmapDrawable.getBitmap();
1240
1241         // If the favorite icon is null, load the default.
1242         if (favoriteIconBitmap == null) {
1243             favoriteIconBitmap = favoriteIconDefaultBitmap;
1244         }
1245
1246         // Initialize the user agent array adapter and string array.
1247         userAgentNamesArray = ArrayAdapter.createFromResource(this, R.array.user_agent_names, R.layout.domain_settings_spinner_item);
1248         userAgentDataArray = getResources().getStringArray(R.array.user_agent_data);
1249
1250         // Apply the app settings from the shared preferences.
1251         applyAppSettings();
1252
1253         // Instantiate the block list helper.
1254         BlockListHelper blockListHelper = new BlockListHelper();
1255
1256         // Initialize the list of resource requests.
1257         resourceRequests = new ArrayList<>();
1258
1259         // Parse the block lists.
1260         final ArrayList<List<String[]>> easyList = blockListHelper.parseBlockList(getAssets(), "blocklists/easylist.txt");
1261         final ArrayList<List<String[]>> easyPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/easyprivacy.txt");
1262         final ArrayList<List<String[]>> fanboysAnnoyanceList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-annoyance.txt");
1263         final ArrayList<List<String[]>> fanboysSocialList = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-social.txt");
1264         final ArrayList<List<String[]>> ultraPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/ultraprivacy.txt");
1265
1266         // Store the list versions.
1267         easyListVersion = easyList.get(0).get(0)[0];
1268         easyPrivacyVersion = easyPrivacy.get(0).get(0)[0];
1269         fanboysAnnoyanceVersion = fanboysAnnoyanceList.get(0).get(0)[0];
1270         fanboysSocialVersion = fanboysSocialList.get(0).get(0)[0];
1271         ultraPrivacyVersion = ultraPrivacy.get(0).get(0)[0];
1272
1273         // Get a handle for the activity.  This is used to update the requests counter while the navigation menu is open.
1274         Activity activity = this;
1275
1276         mainWebView.setWebViewClient(new WebViewClient() {
1277             // `shouldOverrideUrlLoading` makes this `WebView` the default handler for URLs inside the app, so that links are not kicked out to other apps.
1278             // The deprecated `shouldOverrideUrlLoading` must be used until API >= 24.
1279             @SuppressWarnings("deprecation")
1280             @Override
1281             public boolean shouldOverrideUrlLoading(WebView view, String url) {
1282                 if (url.startsWith("http")) {  // Load the URL in Privacy Browser.
1283                     // Reset the formatted URL string so the page will load correctly if blocking of third-party requests is enabled.
1284                     formattedUrlString = "";
1285
1286                     // Apply the domain settings for the new URL.  `applyDomainSettings` doesn't do anything if the domain has not changed.
1287                     applyDomainSettings(url, true, false);
1288
1289                     // Returning false causes the current WebView to handle the URL and prevents it from adding redirects to the history list.
1290                     return false;
1291                 } else if (url.startsWith("mailto:")) {  // Load the email address in an external email program.
1292                     // Use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
1293                     Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
1294
1295                     // Parse the url and set it as the data for the intent.
1296                     emailIntent.setData(Uri.parse(url));
1297
1298                     // Open the email program in a new task instead of as part of Privacy Browser.
1299                     emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1300
1301                     // Make it so.
1302                     startActivity(emailIntent);
1303
1304                     // Returning true indicates Privacy Browser is handling the URL by creating an intent.
1305                     return true;
1306                 } else if (url.startsWith("tel:")) {  // Load the phone number in the dialer.
1307                     // Open the dialer and load the phone number, but wait for the user to place the call.
1308                     Intent dialIntent = new Intent(Intent.ACTION_DIAL);
1309
1310                     // Add the phone number to the intent.
1311                     dialIntent.setData(Uri.parse(url));
1312
1313                     // Open the dialer in a new task instead of as part of Privacy Browser.
1314                     dialIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1315
1316                     // Make it so.
1317                     startActivity(dialIntent);
1318
1319                     // Returning true indicates Privacy Browser is handling the URL by creating an intent.
1320                     return true;
1321                 } else {  // Load a system chooser to select an app that can handle the URL.
1322                     // Open an app that can handle the URL.
1323                     Intent genericIntent = new Intent(Intent.ACTION_VIEW);
1324
1325                     // Add the URL to the intent.
1326                     genericIntent.setData(Uri.parse(url));
1327
1328                     // List all apps that can handle the URL instead of just opening the first one.
1329                     genericIntent.addCategory(Intent.CATEGORY_BROWSABLE);
1330
1331                     // Open the app in a new task instead of as part of Privacy Browser.
1332                     genericIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1333
1334                     // Start the app or display a snackbar if no app is available to handle the URL.
1335                     try {
1336                         startActivity(genericIntent);
1337                     } catch (ActivityNotFoundException exception) {
1338                         Snackbar.make(mainWebView, getString(R.string.unrecognized_url) + "  " + url, Snackbar.LENGTH_SHORT).show();
1339                     }
1340
1341                     // Returning true indicates Privacy Browser is handling the URL by creating an intent.
1342                     return true;
1343                 }
1344             }
1345
1346             // Check requests against the block lists.  The deprecated `shouldInterceptRequest()` must be used until minimum API >= 21.
1347             @SuppressWarnings("deprecation")
1348             @Override
1349             public WebResourceResponse shouldInterceptRequest(WebView view, String url){
1350                 // Create an empty web resource response to be used if the resource request is blocked.
1351                 WebResourceResponse emptyWebResourceResponse = new WebResourceResponse("text/plain", "utf8", new ByteArrayInputStream("".getBytes()));
1352
1353                 // Reset the whitelist results tracker.
1354                 whiteListResultStringArray = null;
1355
1356                 // Initialize the third party request tracker.
1357                 boolean isThirdPartyRequest = false;
1358
1359                 // Initialize the current domain string.
1360                 String currentDomain = "";
1361
1362                 // Nobody is happy when comparing null strings.
1363                 if (!(formattedUrlString == null) && !(url == null)) {
1364                     // Get the domain strings to URIs.
1365                     Uri currentDomainUri = Uri.parse(formattedUrlString);
1366                     Uri requestDomainUri = Uri.parse(url);
1367
1368                     // Get the domain host names.
1369                     String currentBaseDomain = currentDomainUri.getHost();
1370                     String requestBaseDomain = requestDomainUri.getHost();
1371
1372                     // Update the current domain variable.
1373                     currentDomain = currentBaseDomain;
1374
1375                     // Only compare the current base domain and the request base domain if neither is null.
1376                     if (!(currentBaseDomain == null) && !(requestBaseDomain == null)) {
1377                         // Determine the current base domain.
1378                         while (currentBaseDomain.indexOf(".", currentBaseDomain.indexOf(".") + 1) > 0) {  // There is at least one subdomain.
1379                             // Remove the first subdomain.
1380                             currentBaseDomain = currentBaseDomain.substring(currentBaseDomain.indexOf(".") + 1);
1381                         }
1382
1383                         // Determine the request base domain.
1384                         while (requestBaseDomain.indexOf(".", requestBaseDomain.indexOf(".") + 1) > 0) {  // There is at least one subdomain.
1385                             // Remove the first subdomain.
1386                             requestBaseDomain = requestBaseDomain.substring(requestBaseDomain.indexOf(".") + 1);
1387                         }
1388
1389                         // Update the third party request tracker.
1390                         isThirdPartyRequest = !currentBaseDomain.equals(requestBaseDomain);
1391                     }
1392                 }
1393
1394                 // Block third-party requests if enabled.
1395                 if (isThirdPartyRequest && blockAllThirdPartyRequests) {
1396                     // Increment the blocked requests counters.
1397                     blockedRequests++;
1398                     thirdPartyBlockedRequests++;
1399
1400                     // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1401                     activity.runOnUiThread(() -> {
1402                         navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1403                         blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1404                         blockAllThirdPartyRequestsMenuItem.setTitle(thirdPartyBlockedRequests + " - " + getString(R.string.block_all_third_party_requests));
1405                     });
1406
1407                     // Add the request to the log.
1408                     resourceRequests.add(new String[]{String.valueOf(REQUEST_THIRD_PARTY), url});
1409
1410                     // Return an empty web resource response.
1411                     return emptyWebResourceResponse;
1412                 }
1413
1414                 // Check UltraPrivacy if it is enabled.
1415                 if (ultraPrivacyEnabled) {
1416                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, ultraPrivacy)) {
1417                         // Increment the blocked requests counters.
1418                         blockedRequests++;
1419                         ultraPrivacyBlockedRequests++;
1420
1421                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1422                         activity.runOnUiThread(() -> {
1423                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1424                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1425                             ultraPrivacyMenuItem.setTitle(ultraPrivacyBlockedRequests + " - " + getString(R.string.ultraprivacy));
1426                         });
1427
1428                         // The resource request was blocked.  Return an empty web resource response.
1429                         return emptyWebResourceResponse;
1430                     }
1431
1432                     // If the whitelist result is not null, the request has been allowed by UltraPrivacy.
1433                     if (whiteListResultStringArray != null) {
1434                         // Add a whitelist entry to the resource requests array.
1435                         resourceRequests.add(whiteListResultStringArray);
1436
1437                         // The resource request has been allowed by UltraPrivacy.  `return null` loads the requested resource.
1438                         return null;
1439                     }
1440                 }
1441
1442                 // Check EasyList if it is enabled.
1443                 if (easyListEnabled) {
1444                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, easyList)) {
1445                         // Increment the blocked requests counters.
1446                         blockedRequests++;
1447                         easyListBlockedRequests++;
1448
1449                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1450                         activity.runOnUiThread(() -> {
1451                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1452                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1453                             easyListMenuItem.setTitle(easyListBlockedRequests + " - " + getString(R.string.easylist));
1454                         });
1455
1456                         // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
1457                         whiteListResultStringArray = null;
1458
1459                         // The resource request was blocked.  Return an empty web resource response.
1460                         return emptyWebResourceResponse;
1461                     }
1462                 }
1463
1464                 // Check EasyPrivacy if it is enabled.
1465                 if (easyPrivacyEnabled) {
1466                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, easyPrivacy)) {
1467                         // Increment the blocked requests counters.
1468                         blockedRequests++;
1469                         easyPrivacyBlockedRequests++;
1470
1471                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1472                         activity.runOnUiThread(() -> {
1473                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1474                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1475                             easyPrivacyMenuItem.setTitle(easyPrivacyBlockedRequests + " - " + getString(R.string.easyprivacy));
1476                         });
1477
1478                         // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
1479                         whiteListResultStringArray = null;
1480
1481                         // The resource request was blocked.  Return an empty web resource response.
1482                         return emptyWebResourceResponse;
1483                     }
1484                 }
1485
1486                 // Check Fanboy’s Annoyance List if it is enabled.
1487                 if (fanboysAnnoyanceListEnabled) {
1488                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, fanboysAnnoyanceList)) {
1489                         // Increment the blocked requests counters.
1490                         blockedRequests++;
1491                         fanboysAnnoyanceListBlockedRequests++;
1492
1493                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1494                         activity.runOnUiThread(() -> {
1495                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1496                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1497                             fanboysAnnoyanceListMenuItem.setTitle(fanboysAnnoyanceListBlockedRequests + " - " + getString(R.string.fanboys_annoyance_list));
1498                         });
1499
1500                         // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
1501                         whiteListResultStringArray = null;
1502
1503                         // The resource request was blocked.  Return an empty web resource response.
1504                         return emptyWebResourceResponse;
1505                     }
1506                 } else if (fanboysSocialBlockingListEnabled){  // Only check Fanboy’s Social Blocking List if Fanboy’s Annoyance List is disabled.
1507                     if (blockListHelper.isBlocked(currentDomain, url, isThirdPartyRequest, fanboysSocialList)) {
1508                         // Increment the blocked requests counters.
1509                         blockedRequests++;
1510                         fanboysSocialBlockingListBlockedRequests++;
1511
1512                         // Update the titles of the blocklist menu items.  This must be run from the UI thread.
1513                         activity.runOnUiThread(() -> {
1514                             navigationRequestsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1515                             blocklistsMenuItem.setTitle(getString(R.string.requests) + " - " + blockedRequests);
1516                             fanboysSocialBlockingListMenuItem.setTitle(fanboysSocialBlockingListBlockedRequests + " - " + getString(R.string.fanboys_social_blocking_list));
1517                         });
1518
1519                         // Reset the whitelist results tracker (because otherwise it will sometimes add results to the list due to a race condition).
1520                         whiteListResultStringArray = null;
1521
1522                         // The resource request was blocked.  Return an empty web resource response.
1523                         return emptyWebResourceResponse;
1524                     }
1525                 }
1526
1527                 // Add the request to the log because it hasn't been processed by any of the previous checks.
1528                 if (whiteListResultStringArray != null ) {  // The request was processed by a whitelist.
1529                     resourceRequests.add(whiteListResultStringArray);
1530                 } else {  // The request didn't match any blocklist entry.  Log it as a default request.
1531                     resourceRequests.add(new String[]{String.valueOf(REQUEST_DEFAULT), url});
1532                 }
1533
1534                 // The resource request has not been blocked.  `return null` loads the requested resource.
1535                 return null;
1536             }
1537
1538             // Handle HTTP authentication requests.
1539             @Override
1540             public void onReceivedHttpAuthRequest(WebView view, HttpAuthHandler handler, String host, String realm) {
1541                 // Store `handler` so it can be accessed from `onHttpAuthenticationCancel()` and `onHttpAuthenticationProceed()`.
1542                 httpAuthHandler = handler;
1543
1544                 // Display the HTTP authentication dialog.
1545                 AppCompatDialogFragment httpAuthenticationDialogFragment = HttpAuthenticationDialog.displayDialog(host, realm);
1546                 httpAuthenticationDialogFragment.show(getSupportFragmentManager(), getString(R.string.http_authentication));
1547             }
1548
1549             // Update the URL in urlTextBox when the page starts to load.
1550             @Override
1551             public void onPageStarted(WebView view, String url, Bitmap favicon) {
1552                 // Reset the list of resource requests.
1553                 resourceRequests.clear();
1554
1555                 // Initialize the counters for requests blocked by each blocklist.
1556                 blockedRequests = 0;
1557                 easyListBlockedRequests = 0;
1558                 easyPrivacyBlockedRequests = 0;
1559                 fanboysAnnoyanceListBlockedRequests = 0;
1560                 fanboysSocialBlockingListBlockedRequests = 0;
1561                 ultraPrivacyBlockedRequests = 0;
1562                 thirdPartyBlockedRequests = 0;
1563
1564                 // If night mode is enabled, hide `mainWebView` until after the night mode CSS is applied.
1565                 if (nightMode) {
1566                     mainWebView.setVisibility(View.INVISIBLE);
1567                 }
1568
1569                 // Hide the keyboard.  `0` indicates no additional flags.
1570                 inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
1571
1572                 // Check to see if Privacy Browser is waiting on Orbot.
1573                 if (!waitingForOrbot) {  // We are not waiting on Orbot, so we need to process the URL.
1574                     // 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.
1575                     formattedUrlString = url;
1576
1577                     // Display the formatted URL text.
1578                     urlTextBox.setText(formattedUrlString);
1579
1580                     // Apply text highlighting to `urlTextBox`.
1581                     highlightUrlText();
1582
1583                     // Apply any custom domain settings if the URL was loaded by navigating history.
1584                     if (navigatingHistory) {
1585                         // Reset `navigatingHistory`.
1586                         navigatingHistory = false;
1587
1588                         // Apply the domain settings.
1589                         applyDomainSettings(url, true, false);
1590                     }
1591
1592                     // 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.
1593                     urlIsLoading = true;
1594
1595                     // Replace Refresh with Stop if the menu item has been created.  (The WebView typically begins loading before the menu items are instantiated.)
1596                     if (refreshMenuItem != null) {
1597                         // Set the title.
1598                         refreshMenuItem.setTitle(R.string.stop);
1599
1600                         // If the icon is displayed in the AppBar, set it according to the theme.
1601                         if (displayAdditionalAppBarIcons) {
1602                             if (darkTheme) {
1603                                 refreshMenuItem.setIcon(R.drawable.close_dark);
1604                             } else {
1605                                 refreshMenuItem.setIcon(R.drawable.close_light);
1606                             }
1607                         }
1608                     }
1609                 }
1610             }
1611
1612             // It is necessary to update `formattedUrlString` and `urlTextBox` after the page finishes loading because the final URL can change during load.
1613             @Override
1614             public void onPageFinished(WebView view, String url) {
1615                 // Reset the wide view port if it has been turned off by the waiting for Orbot message.
1616                 if (!waitingForOrbot) {
1617                     mainWebView.getSettings().setUseWideViewPort(true);
1618                 }
1619
1620                 // Flush any cookies to persistent storage.  `CookieManager` has become very lazy about flushing cookies in recent versions.
1621                 if (firstPartyCookiesEnabled && Build.VERSION.SDK_INT >= 21) {
1622                     cookieManager.flush();
1623                 }
1624
1625                 // Update the Refresh menu item if it has been created.
1626                 if (refreshMenuItem != null) {
1627                     // Reset the Refresh title.
1628                     refreshMenuItem.setTitle(R.string.refresh);
1629
1630                     // If the icon is displayed in the AppBar, reset it according to the theme.
1631                     if (displayAdditionalAppBarIcons) {
1632                         if (darkTheme) {
1633                             refreshMenuItem.setIcon(R.drawable.refresh_enabled_dark);
1634                         } else {
1635                             refreshMenuItem.setIcon(R.drawable.refresh_enabled_light);
1636                         }
1637                     }
1638                 }
1639
1640                 // Reset `urlIsLoading`, which is used to prevent reloads on redirect if the user agent changes.
1641                 urlIsLoading = false;
1642
1643                 // Clear the cache and history if Incognito Mode is enabled.
1644                 if (incognitoModeEnabled) {
1645                     // Clear the cache.  `true` includes disk files.
1646                     mainWebView.clearCache(true);
1647
1648                     // Clear the back/forward history.
1649                     mainWebView.clearHistory();
1650
1651                     // Manually delete cache folders.
1652                     try {
1653                         // Delete the main cache directory.
1654                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
1655
1656                         // Delete the secondary `Service Worker` cache directory.
1657                         // A `String[]` must be used because the directory contains a space and `Runtime.exec` will not escape the string correctly otherwise.
1658                         privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
1659                     } catch (IOException e) {
1660                         // Do nothing if an error is thrown.
1661                     }
1662                 }
1663
1664                 // Update `urlTextBox` and apply domain settings if not waiting on Orbot.
1665                 if (!waitingForOrbot) {
1666                     // Check to see if `WebView` has set `url` to be `about:blank`.
1667                     if (url.equals("about:blank")) {  // `WebView` is blank, so `formattedUrlString` should be `""` and `urlTextBox` should display a hint.
1668                         // Set `formattedUrlString` to `""`.
1669                         formattedUrlString = "";
1670
1671                         urlTextBox.setText(formattedUrlString);
1672
1673                         // Request focus for `urlTextBox`.
1674                         urlTextBox.requestFocus();
1675
1676                         // Display the keyboard.
1677                         inputMethodManager.showSoftInput(urlTextBox, 0);
1678
1679                         // Apply the domain settings.  This clears any settings from the previous domain.
1680                         applyDomainSettings(formattedUrlString, true, false);
1681                     } else {  // `WebView` has loaded a webpage.
1682                         // Set `formattedUrlString`.
1683                         formattedUrlString = url;
1684
1685                         // Only update `urlTextBox` if the user is not typing in it.
1686                         if (!urlTextBox.hasFocus()) {
1687                             // Display the formatted URL text.
1688                             urlTextBox.setText(formattedUrlString);
1689
1690                             // Apply text highlighting to `urlTextBox`.
1691                             highlightUrlText();
1692                         }
1693                     }
1694
1695                     // Store the SSL certificate so it can be accessed from `ViewSslCertificateDialog` and `PinnedSslCertificateMismatchDialog`.
1696                     sslCertificate = mainWebView.getCertificate();
1697
1698                     // 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.
1699                     if (pinnedDomainSslCertificate && !ignorePinnedSslCertificate) {
1700                         // Initialize the current SSL certificate variables.
1701                         String currentWebsiteIssuedToCName = "";
1702                         String currentWebsiteIssuedToOName = "";
1703                         String currentWebsiteIssuedToUName = "";
1704                         String currentWebsiteIssuedByCName = "";
1705                         String currentWebsiteIssuedByOName = "";
1706                         String currentWebsiteIssuedByUName = "";
1707                         Date currentWebsiteSslStartDate = null;
1708                         Date currentWebsiteSslEndDate = null;
1709
1710
1711                         // Extract the individual pieces of information from the current website SSL certificate if it is not null.
1712                         if (sslCertificate != null) {
1713                             currentWebsiteIssuedToCName = sslCertificate.getIssuedTo().getCName();
1714                             currentWebsiteIssuedToOName = sslCertificate.getIssuedTo().getOName();
1715                             currentWebsiteIssuedToUName = sslCertificate.getIssuedTo().getUName();
1716                             currentWebsiteIssuedByCName = sslCertificate.getIssuedBy().getCName();
1717                             currentWebsiteIssuedByOName = sslCertificate.getIssuedBy().getOName();
1718                             currentWebsiteIssuedByUName = sslCertificate.getIssuedBy().getUName();
1719                             currentWebsiteSslStartDate = sslCertificate.getValidNotBeforeDate();
1720                             currentWebsiteSslEndDate = sslCertificate.getValidNotAfterDate();
1721                         }
1722
1723                         // 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`.
1724                         String currentWebsiteSslStartDateString = "";
1725                         String currentWebsiteSslEndDateString = "";
1726                         String pinnedDomainSslStartDateString = "";
1727                         String pinnedDomainSslEndDateString = "";
1728
1729                         // Convert the `Dates` to `Strings` if they are not `null`.
1730                         if (currentWebsiteSslStartDate != null) {
1731                             currentWebsiteSslStartDateString = currentWebsiteSslStartDate.toString();
1732                         }
1733
1734                         if (currentWebsiteSslEndDate != null) {
1735                             currentWebsiteSslEndDateString = currentWebsiteSslEndDate.toString();
1736                         }
1737
1738                         if (pinnedDomainSslStartDate != null) {
1739                             pinnedDomainSslStartDateString = pinnedDomainSslStartDate.toString();
1740                         }
1741
1742                         if (pinnedDomainSslEndDate != null) {
1743                             pinnedDomainSslEndDateString = pinnedDomainSslEndDate.toString();
1744                         }
1745
1746                         // Check to see if the pinned SSL certificate matches the current website certificate.
1747                         if (!currentWebsiteIssuedToCName.equals(pinnedDomainSslIssuedToCNameString) || !currentWebsiteIssuedToOName.equals(pinnedDomainSslIssuedToONameString) ||
1748                                 !currentWebsiteIssuedToUName.equals(pinnedDomainSslIssuedToUNameString) || !currentWebsiteIssuedByCName.equals(pinnedDomainSslIssuedByCNameString) ||
1749                                 !currentWebsiteIssuedByOName.equals(pinnedDomainSslIssuedByONameString) || !currentWebsiteIssuedByUName.equals(pinnedDomainSslIssuedByUNameString) ||
1750                                 !currentWebsiteSslStartDateString.equals(pinnedDomainSslStartDateString) || !currentWebsiteSslEndDateString.equals(pinnedDomainSslEndDateString)) {
1751                             // The pinned SSL certificate doesn't match the current domain certificate.
1752                             //Display the pinned SSL certificate mismatch `AlertDialog`.
1753                             AppCompatDialogFragment pinnedSslCertificateMismatchDialogFragment = new PinnedSslCertificateMismatchDialog();
1754                             pinnedSslCertificateMismatchDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_mismatch));
1755                         }
1756                     }
1757                 }
1758             }
1759
1760             // Handle SSL Certificate errors.
1761             @Override
1762             public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
1763                 // Get the current website SSL certificate.
1764                 SslCertificate currentWebsiteSslCertificate = error.getCertificate();
1765
1766                 // Extract the individual pieces of information from the current website SSL certificate.
1767                 String currentWebsiteIssuedToCName = currentWebsiteSslCertificate.getIssuedTo().getCName();
1768                 String currentWebsiteIssuedToOName = currentWebsiteSslCertificate.getIssuedTo().getOName();
1769                 String currentWebsiteIssuedToUName = currentWebsiteSslCertificate.getIssuedTo().getUName();
1770                 String currentWebsiteIssuedByCName = currentWebsiteSslCertificate.getIssuedBy().getCName();
1771                 String currentWebsiteIssuedByOName = currentWebsiteSslCertificate.getIssuedBy().getOName();
1772                 String currentWebsiteIssuedByUName = currentWebsiteSslCertificate.getIssuedBy().getUName();
1773                 Date currentWebsiteSslStartDate = currentWebsiteSslCertificate.getValidNotBeforeDate();
1774                 Date currentWebsiteSslEndDate = currentWebsiteSslCertificate.getValidNotAfterDate();
1775
1776                 // Proceed to the website if the current SSL website certificate matches the pinned domain certificate.
1777                 if (pinnedDomainSslCertificate &&
1778                         currentWebsiteIssuedToCName.equals(pinnedDomainSslIssuedToCNameString) && currentWebsiteIssuedToOName.equals(pinnedDomainSslIssuedToONameString) &&
1779                         currentWebsiteIssuedToUName.equals(pinnedDomainSslIssuedToUNameString) && currentWebsiteIssuedByCName.equals(pinnedDomainSslIssuedByCNameString) &&
1780                         currentWebsiteIssuedByOName.equals(pinnedDomainSslIssuedByONameString) && currentWebsiteIssuedByUName.equals(pinnedDomainSslIssuedByUNameString) &&
1781                         currentWebsiteSslStartDate.equals(pinnedDomainSslStartDate) && currentWebsiteSslEndDate.equals(pinnedDomainSslEndDate)) {
1782                     // An SSL certificate is pinned and matches the current domain certificate.
1783                     // Proceed to the website without displaying an error.
1784                     handler.proceed();
1785                 } else {  // Either there isn't a pinned SSL certificate or it doesn't match the current website certificate.
1786                     // Store `handler` so it can be accesses from `onSslErrorCancel()` and `onSslErrorProceed()`.
1787                     sslErrorHandler = handler;
1788
1789                     // Display the SSL error `AlertDialog`.
1790                     AppCompatDialogFragment sslCertificateErrorDialogFragment = SslCertificateErrorDialog.displayDialog(error);
1791                     sslCertificateErrorDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_error));
1792                 }
1793             }
1794         });
1795
1796         // Load the website if not waiting for Orbot to connect.
1797         if (!waitingForOrbot) {
1798             loadUrl(formattedUrlString);
1799         }
1800     }
1801
1802     @Override
1803     protected void onNewIntent(Intent intent) {
1804         // Sets the new intent as the activity intent, so that any future `getIntent()`s pick up this one instead of creating a new activity.
1805         setIntent(intent);
1806
1807         // Check to see if the intent contains a new URL.
1808         if (intent.getData() != null) {
1809             // Get the intent data.
1810             final Uri intentUriData = intent.getData();
1811
1812             // Load the website.
1813             loadUrl(intentUriData.toString());
1814
1815             // Close the navigation drawer if it is open.
1816             if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
1817                 drawerLayout.closeDrawer(GravityCompat.START);
1818             }
1819
1820             // Close the bookmarks drawer if it is open.
1821             if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
1822                 drawerLayout.closeDrawer(GravityCompat.END);
1823             }
1824
1825             // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
1826             mainWebView.requestFocus();
1827         }
1828     }
1829
1830     @Override
1831     public void onRestart() {
1832         // Run the default commands.
1833         super.onRestart();
1834
1835         // Make sure Orbot is running if Privacy Browser is proxying through Orbot.
1836         if (proxyThroughOrbot) {
1837             // Request Orbot to start.  If Orbot is already running no hard will be caused by this request.
1838             Intent orbotIntent = new Intent("org.torproject.android.intent.action.START");
1839
1840             // Send the intent to the Orbot package.
1841             orbotIntent.setPackage("org.torproject.android");
1842
1843             // Make it so.
1844             sendBroadcast(orbotIntent);
1845         }
1846
1847         // Apply the app settings if returning from the Settings activity..
1848         if (reapplyAppSettingsOnRestart) {
1849             // Apply the app settings.
1850             applyAppSettings();
1851
1852             // Reload the webpage if displaying of images has been disabled in the Settings activity.
1853             if (reloadOnRestart) {
1854                 // Reload `mainWebView`.
1855                 mainWebView.reload();
1856
1857                 // Reset `reloadOnRestartBoolean`.
1858                 reloadOnRestart = false;
1859             }
1860
1861             // Reset the return from settings flag.
1862             reapplyAppSettingsOnRestart = false;
1863         }
1864
1865         // Apply the domain settings if returning from the Domains activity.
1866         if (reapplyDomainSettingsOnRestart) {
1867             // Reapply the domain settings.
1868             applyDomainSettings(formattedUrlString, false, true);
1869
1870             // Reset `reapplyDomainSettingsOnRestart`.
1871             reapplyDomainSettingsOnRestart = false;
1872         }
1873
1874         // Load the URL on restart to apply changes to night mode.
1875         if (loadUrlOnRestart) {
1876             // Load the current `formattedUrlString`.
1877             loadUrl(formattedUrlString);
1878
1879             // Reset `loadUrlOnRestart.
1880             loadUrlOnRestart = false;
1881         }
1882
1883         // Update the bookmarks drawer if returning from the Bookmarks activity.
1884         if (restartFromBookmarksActivity) {
1885             // Close the bookmarks drawer.
1886             drawerLayout.closeDrawer(GravityCompat.END);
1887
1888             // Reload the bookmarks drawer.
1889             loadBookmarksFolder();
1890
1891             // Reset `restartFromBookmarksActivity`.
1892             restartFromBookmarksActivity = false;
1893         }
1894
1895         // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
1896         updatePrivacyIcons(true);
1897     }
1898
1899     // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
1900     @Override
1901     public void onResume() {
1902         // Run the default commands.
1903         super.onResume();
1904
1905         // Resume JavaScript (if enabled).
1906         mainWebView.resumeTimers();
1907
1908         // Resume `mainWebView`.
1909         mainWebView.onResume();
1910
1911         // Resume the adView for the free flavor.
1912         if (BuildConfig.FLAVOR.contentEquals("free")) {
1913             // Resume the ad.
1914             AdHelper.resumeAd(findViewById(R.id.adview));
1915         }
1916
1917         // Display a message to the user if waiting for Orbot.
1918         if (waitingForOrbot && !orbotStatus.equals("ON")) {
1919             // Disable the wide view port so that the waiting for Orbot text is displayed correctly.
1920             mainWebView.getSettings().setUseWideViewPort(false);
1921
1922             // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
1923             mainWebView.loadData(waitingForOrbotHTMLString, "text/html", null);
1924         }
1925
1926         if (displayingFullScreenVideo) {
1927             // Remove the translucent overlays.
1928             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
1929
1930             // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
1931             drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
1932
1933             /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
1934              * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
1935              * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
1936              */
1937             rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
1938         }
1939     }
1940
1941     @Override
1942     public void onPause() {
1943         // Run the default commands.
1944         super.onPause();
1945
1946         // Pause `mainWebView`.
1947         mainWebView.onPause();
1948
1949         // Stop all JavaScript.
1950         mainWebView.pauseTimers();
1951
1952         // Pause the ad or it will continue to consume resources in the background on the free flavor.
1953         if (BuildConfig.FLAVOR.contentEquals("free")) {
1954             // Pause the ad.
1955             AdHelper.pauseAd(findViewById(R.id.adview));
1956         }
1957     }
1958
1959     @Override
1960     public void onDestroy() {
1961         // Unregister the Orbot status broadcast receiver.
1962         this.unregisterReceiver(orbotStatusBroadcastReceiver);
1963
1964         // Close the bookmarks cursor and database.
1965         bookmarksCursor.close();
1966         bookmarksDatabaseHelper.close();
1967
1968         // Run the default commands.
1969         super.onDestroy();
1970     }
1971
1972     @Override
1973     public boolean onCreateOptionsMenu(Menu menu) {
1974         // Inflate the menu; this adds items to the action bar if it is present.
1975         getMenuInflater().inflate(R.menu.webview_options_menu, menu);
1976
1977         // Set mainMenu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons`.
1978         mainMenu = menu;
1979
1980         // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
1981         updatePrivacyIcons(false);
1982
1983         // Get handles for the menu items.
1984         MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
1985         MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
1986         MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
1987         MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
1988         MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
1989         refreshMenuItem = menu.findItem(R.id.refresh);
1990         blocklistsMenuItem = menu.findItem(R.id.blocklists);
1991         easyListMenuItem = menu.findItem(R.id.easylist);
1992         easyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
1993         fanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
1994         fanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
1995         ultraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
1996         blockAllThirdPartyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
1997         MenuItem adConsentMenuItem = menu.findItem(R.id.ad_consent);
1998
1999         // Only display third-party cookies if API >= 21
2000         toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
2001
2002         // Only display the form data menu items if the API < 26.
2003         toggleSaveFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
2004         clearFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
2005
2006         // Only show Ad Consent if this is the free flavor.
2007         adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
2008
2009         // Get the shared preference values.
2010         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
2011
2012         // Get the status of the additional AppBar icons.
2013         displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
2014
2015         // 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.
2016         if (displayAdditionalAppBarIcons) {
2017             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
2018             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
2019             refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
2020         } else { //Do not display the additional icons.
2021             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
2022             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
2023             refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
2024         }
2025
2026         // Replace Refresh with Stop if a URL is already loading.
2027         if (urlIsLoading) {
2028             // Set the title.
2029             refreshMenuItem.setTitle(R.string.stop);
2030
2031             // If the icon is displayed in the AppBar, set it according to the theme.
2032             if (displayAdditionalAppBarIcons) {
2033                 if (darkTheme) {
2034                     refreshMenuItem.setIcon(R.drawable.close_dark);
2035                 } else {
2036                     refreshMenuItem.setIcon(R.drawable.close_light);
2037                 }
2038             }
2039         }
2040
2041         return true;
2042     }
2043
2044     @Override
2045     public boolean onPrepareOptionsMenu(Menu menu) {
2046         // Get handles for the menu items.
2047         MenuItem addOrEditDomain = menu.findItem(R.id.add_or_edit_domain);
2048         MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
2049         MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
2050         MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
2051         MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
2052         MenuItem clearDataMenuItem = menu.findItem(R.id.clear_data);
2053         MenuItem clearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
2054         MenuItem clearDOMStorageMenuItem = menu.findItem(R.id.clear_dom_storage);
2055         MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
2056         MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
2057         MenuItem swipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
2058         MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
2059         MenuItem nightModeMenuItem = menu.findItem(R.id.night_mode);
2060
2061         // Set the text for the domain menu item.
2062         if (domainSettingsApplied) {
2063             addOrEditDomain.setTitle(R.string.edit_domain_settings);
2064         } else {
2065             addOrEditDomain.setTitle(R.string.add_domain_settings);
2066         }
2067
2068         // Set the status of the menu item checkboxes.
2069         toggleFirstPartyCookiesMenuItem.setChecked(firstPartyCookiesEnabled);
2070         toggleThirdPartyCookiesMenuItem.setChecked(thirdPartyCookiesEnabled);
2071         toggleDomStorageMenuItem.setChecked(domStorageEnabled);
2072         toggleSaveFormDataMenuItem.setChecked(saveFormDataEnabled);  // Form data can be removed once the minimum API >= 26.
2073         easyListMenuItem.setChecked(easyListEnabled);
2074         easyPrivacyMenuItem.setChecked(easyPrivacyEnabled);
2075         fanboysAnnoyanceListMenuItem.setChecked(fanboysAnnoyanceListEnabled);
2076         fanboysSocialBlockingListMenuItem.setChecked(fanboysSocialBlockingListEnabled);
2077         ultraPrivacyMenuItem.setChecked(ultraPrivacyEnabled);
2078         blockAllThirdPartyRequestsMenuItem.setChecked(blockAllThirdPartyRequests);
2079         swipeToRefreshMenuItem.setChecked(swipeRefreshLayout.isEnabled());
2080         displayImagesMenuItem.setChecked(mainWebView.getSettings().getLoadsImagesAutomatically());
2081         nightModeMenuItem.setChecked(nightMode);
2082
2083         // Enable third-party cookies if first-party cookies are enabled.
2084         toggleThirdPartyCookiesMenuItem.setEnabled(firstPartyCookiesEnabled);
2085
2086         // Enable DOM Storage if JavaScript is enabled.
2087         toggleDomStorageMenuItem.setEnabled(javaScriptEnabled);
2088
2089         // Enable Clear Cookies if there are any.
2090         clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
2091
2092         // Get a count of the number of files in the Local Storage directory.
2093         File localStorageDirectory = new File (privateDataDirectoryString + "/app_webview/Local Storage/");
2094         int localStorageDirectoryNumberOfFiles = 0;
2095         if (localStorageDirectory.exists()) {
2096             localStorageDirectoryNumberOfFiles = localStorageDirectory.list().length;
2097         }
2098
2099         // Get a count of the number of files in the IndexedDB directory.
2100         File indexedDBDirectory = new File (privateDataDirectoryString + "/app_webview/IndexedDB");
2101         int indexedDBDirectoryNumberOfFiles = 0;
2102         if (indexedDBDirectory.exists()) {
2103             indexedDBDirectoryNumberOfFiles = indexedDBDirectory.list().length;
2104         }
2105
2106         // Enable Clear DOM Storage if there is any.
2107         clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
2108
2109         // Enable Clear Form Data is there is any.  This can be removed once the minimum API >= 26.
2110         if (Build.VERSION.SDK_INT < 26) {
2111             WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(this);
2112             clearFormDataMenuItem.setEnabled(mainWebViewDatabase.hasFormData());
2113         } else {
2114             // Disable clear form data because it is not supported on current version of Android.
2115             clearFormDataMenuItem.setEnabled(false);
2116         }
2117
2118         // Enable Clear Data if any of the submenu items are enabled.
2119         clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
2120
2121         // Disable Fanboy's Social Blocking List if Fanboy's Annoyance List is checked.
2122         fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListEnabled);
2123
2124         // Initialize the display names for the blocklists with the number of blocked requests.
2125         blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + blockedRequests);
2126         easyListMenuItem.setTitle(easyListBlockedRequests + " - " + getString(R.string.easylist));
2127         easyPrivacyMenuItem.setTitle(easyPrivacyBlockedRequests + " - " + getString(R.string.easyprivacy));
2128         fanboysAnnoyanceListMenuItem.setTitle(fanboysAnnoyanceListBlockedRequests + " - " + getString(R.string.fanboys_annoyance_list));
2129         fanboysSocialBlockingListMenuItem.setTitle(fanboysSocialBlockingListBlockedRequests + " - " + getString(R.string.fanboys_social_blocking_list));
2130         ultraPrivacyMenuItem.setTitle(ultraPrivacyBlockedRequests + " - " + getString(R.string.ultraprivacy));
2131         blockAllThirdPartyRequestsMenuItem.setTitle(thirdPartyBlockedRequests + " - " + getString(R.string.block_all_third_party_requests));
2132
2133         // Get the current user agent.
2134         String currentUserAgent = mainWebView.getSettings().getUserAgentString();
2135
2136         // Select the current user agent menu item.  A switch statement cannot be used because the user agents are not compile time constants.
2137         if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[0])) {  // Privacy Browser.
2138             menu.findItem(R.id.user_agent_privacy_browser).setChecked(true);
2139         } else if (currentUserAgent.equals(webViewDefaultUserAgent)) {  // WebView Default.
2140             menu.findItem(R.id.user_agent_webview_default).setChecked(true);
2141         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[2])) {  // Firefox on Android.
2142             menu.findItem(R.id.user_agent_firefox_on_android).setChecked(true);
2143         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[3])) {  // Chrome on Android.
2144             menu.findItem(R.id.user_agent_chrome_on_android).setChecked(true);
2145         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[4])) {  // Safari on iOS.
2146             menu.findItem(R.id.user_agent_safari_on_ios).setChecked(true);
2147         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[5])) {  // Firefox on Linux.
2148             menu.findItem(R.id.user_agent_firefox_on_linux).setChecked(true);
2149         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[6])) {  // Chromium on Linux.
2150             menu.findItem(R.id.user_agent_chromium_on_linux).setChecked(true);
2151         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[7])) {  // Firefox on Windows.
2152             menu.findItem(R.id.user_agent_firefox_on_windows).setChecked(true);
2153         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[8])) {  // Chrome on Windows.
2154             menu.findItem(R.id.user_agent_chrome_on_windows).setChecked(true);
2155         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[9])) {  // Edge on Windows.
2156             menu.findItem(R.id.user_agent_edge_on_windows).setChecked(true);
2157         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[10])) {  // Internet Explorer on Windows.
2158             menu.findItem(R.id.user_agent_internet_explorer_on_windows).setChecked(true);
2159         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[11])) {  // Safari on macOS.
2160             menu.findItem(R.id.user_agent_safari_on_macos).setChecked(true);
2161         } else {  // Custom user agent.
2162             menu.findItem(R.id.user_agent_custom).setChecked(true);
2163         }
2164
2165         // Initialize font size variables.
2166         int fontSize = mainWebView.getSettings().getTextZoom();
2167         String fontSizeTitle;
2168         MenuItem selectedFontSizeMenuItem;
2169
2170         // Prepare the font size title and current size menu item.
2171         switch (fontSize) {
2172             case 25:
2173                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.twenty_five_percent);
2174                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_twenty_five_percent);
2175                 break;
2176
2177             case 50:
2178                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
2179                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
2180                 break;
2181
2182             case 75:
2183                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.seventy_five_percent);
2184                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_seventy_five_percent);
2185                 break;
2186
2187             case 100:
2188                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
2189                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
2190                 break;
2191
2192             case 125:
2193                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_twenty_five_percent);
2194                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_twenty_five_percent);
2195                 break;
2196
2197             case 150:
2198                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_fifty_percent);
2199                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_fifty_percent);
2200                 break;
2201
2202             case 175:
2203                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_seventy_five_percent);
2204                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_seventy_five_percent);
2205                 break;
2206
2207             case 200:
2208                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.two_hundred_percent);
2209                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_two_hundred_percent);
2210                 break;
2211
2212             default:
2213                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
2214                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
2215                 break;
2216         }
2217
2218         // Set the font size title and select the current size menu item.
2219         fontSizeMenuItem.setTitle(fontSizeTitle);
2220         selectedFontSizeMenuItem.setChecked(true);
2221
2222         // Run all the other default commands.
2223         super.onPrepareOptionsMenu(menu);
2224
2225         // Display the menu.
2226         return true;
2227     }
2228
2229     @Override
2230     // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
2231     @SuppressLint("SetJavaScriptEnabled")
2232     // removeAllCookies is deprecated, but it is required for API < 21.
2233     @SuppressWarnings("deprecation")
2234     public boolean onOptionsItemSelected(MenuItem menuItem) {
2235         // Get the selected menu item ID.
2236         int menuItemId = menuItem.getItemId();
2237
2238         // Set the commands that relate to the menu entries.
2239         switch (menuItemId) {
2240             case R.id.toggle_javascript:
2241                 // Switch the status of javaScriptEnabled.
2242                 javaScriptEnabled = !javaScriptEnabled;
2243
2244                 // Apply the new JavaScript status.
2245                 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
2246
2247                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2248                 updatePrivacyIcons(true);
2249
2250                 // Display a `Snackbar`.
2251                 if (javaScriptEnabled) {  // JavaScrip is enabled.
2252                     Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
2253                 } else if (firstPartyCookiesEnabled) {  // JavaScript is disabled, but first-party cookies are enabled.
2254                     Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
2255                 } else {  // Privacy mode.
2256                     Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
2257                 }
2258
2259                 // Reload the WebView.
2260                 mainWebView.reload();
2261                 return true;
2262
2263             case R.id.add_or_edit_domain:
2264                 if (domainSettingsApplied) {  // Edit the current domain settings.
2265                     // Reapply the domain settings on returning to `MainWebViewActivity`.
2266                     reapplyDomainSettingsOnRestart = true;
2267                     currentDomainName = "";
2268
2269                     // Create an intent to launch the domains activity.
2270                     Intent domainsIntent = new Intent(this, DomainsActivity.class);
2271
2272                     // Put extra information instructing the domains activity to directly load the current domain and close on back instead of returning to the domains list.
2273                     domainsIntent.putExtra("loadDomain", domainSettingsDatabaseId);
2274                     domainsIntent.putExtra("closeOnBack", true);
2275
2276                     // Make it so.
2277                     startActivity(domainsIntent);
2278                 } else {  // Add a new domain.
2279                     // Apply the new domain settings on returning to `MainWebViewActivity`.
2280                     reapplyDomainSettingsOnRestart = true;
2281                     currentDomainName = "";
2282
2283                     // Get the current domain
2284                     Uri currentUri = Uri.parse(formattedUrlString);
2285                     String currentDomain = currentUri.getHost();
2286
2287                     // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
2288                     DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
2289
2290                     // Create the domain and store the database ID.
2291                     int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
2292
2293                     // Create an intent to launch the domains activity.
2294                     Intent domainsIntent = new Intent(this, DomainsActivity.class);
2295
2296                     // Put extra information instructing the domains activity to directly load the new domain and close on back instead of returning to the domains list.
2297                     domainsIntent.putExtra("loadDomain", newDomainDatabaseId);
2298                     domainsIntent.putExtra("closeOnBack", true);
2299
2300                     // Make it so.
2301                     startActivity(domainsIntent);
2302                 }
2303                 return true;
2304
2305             case R.id.toggle_first_party_cookies:
2306                 // Switch the status of firstPartyCookiesEnabled.
2307                 firstPartyCookiesEnabled = !firstPartyCookiesEnabled;
2308
2309                 // Update the menu checkbox.
2310                 menuItem.setChecked(firstPartyCookiesEnabled);
2311
2312                 // Apply the new cookie status.
2313                 cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
2314
2315                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2316                 updatePrivacyIcons(true);
2317
2318                 // Display a `Snackbar`.
2319                 if (firstPartyCookiesEnabled) {  // First-party cookies are enabled.
2320                     Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
2321                 } else if (javaScriptEnabled) {  // JavaScript is still enabled.
2322                     Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
2323                 } else {  // Privacy mode.
2324                     Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
2325                 }
2326
2327                 // Reload the WebView.
2328                 mainWebView.reload();
2329                 return true;
2330
2331             case R.id.toggle_third_party_cookies:
2332                 if (Build.VERSION.SDK_INT >= 21) {
2333                     // Switch the status of thirdPartyCookiesEnabled.
2334                     thirdPartyCookiesEnabled = !thirdPartyCookiesEnabled;
2335
2336                     // Update the menu checkbox.
2337                     menuItem.setChecked(thirdPartyCookiesEnabled);
2338
2339                     // Apply the new cookie status.
2340                     cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
2341
2342                     // Display a `Snackbar`.
2343                     if (thirdPartyCookiesEnabled) {
2344                         Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
2345                     } else {
2346                         Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
2347                     }
2348
2349                     // Reload the WebView.
2350                     mainWebView.reload();
2351                 } // Else do nothing because SDK < 21.
2352                 return true;
2353
2354             case R.id.toggle_dom_storage:
2355                 // Switch the status of domStorageEnabled.
2356                 domStorageEnabled = !domStorageEnabled;
2357
2358                 // Update the menu checkbox.
2359                 menuItem.setChecked(domStorageEnabled);
2360
2361                 // Apply the new DOM Storage status.
2362                 mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
2363
2364                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2365                 updatePrivacyIcons(true);
2366
2367                 // Display a `Snackbar`.
2368                 if (domStorageEnabled) {
2369                     Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
2370                 } else {
2371                     Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
2372                 }
2373
2374                 // Reload the WebView.
2375                 mainWebView.reload();
2376                 return true;
2377
2378             // Form data can be removed once the minimum API >= 26.
2379             case R.id.toggle_save_form_data:
2380                 // Switch the status of saveFormDataEnabled.
2381                 saveFormDataEnabled = !saveFormDataEnabled;
2382
2383                 // Update the menu checkbox.
2384                 menuItem.setChecked(saveFormDataEnabled);
2385
2386                 // Apply the new form data status.
2387                 mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
2388
2389                 // Display a `Snackbar`.
2390                 if (saveFormDataEnabled) {
2391                     Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
2392                 } else {
2393                     Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
2394                 }
2395
2396                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
2397                 updatePrivacyIcons(true);
2398
2399                 // Reload the WebView.
2400                 mainWebView.reload();
2401                 return true;
2402
2403             case R.id.clear_cookies:
2404                 Snackbar.make(findViewById(R.id.main_webview), R.string.cookies_deleted, Snackbar.LENGTH_LONG)
2405                         .setAction(R.string.undo, v -> {
2406                             // Do nothing because everything will be handled by `onDismissed()` below.
2407                         })
2408                         .addCallback(new Snackbar.Callback() {
2409                             @Override
2410                             public void onDismissed(Snackbar snackbar, int event) {
2411                                 switch (event) {
2412                                     // The user pushed the `Undo` button.
2413                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
2414                                         // Do nothing.
2415                                         break;
2416
2417                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
2418                                     default:
2419                                         // `cookieManager.removeAllCookie()` varies by SDK.
2420                                         if (Build.VERSION.SDK_INT < 21) {
2421                                             cookieManager.removeAllCookie();
2422                                         } else {
2423                                             // `null` indicates no callback.
2424                                             cookieManager.removeAllCookies(null);
2425                                         }
2426                                 }
2427                             }
2428                         })
2429                         .show();
2430                 return true;
2431
2432             case R.id.clear_dom_storage:
2433                 Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
2434                         .setAction(R.string.undo, v -> {
2435                             // Do nothing because everything will be handled by `onDismissed()` below.
2436                         })
2437                         .addCallback(new Snackbar.Callback() {
2438                             @Override
2439                             public void onDismissed(Snackbar snackbar, int event) {
2440                                 switch (event) {
2441                                     // The user pushed the `Undo` button.
2442                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
2443                                         // Do nothing.
2444                                         break;
2445
2446                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
2447                                     default:
2448                                         // Delete the DOM Storage.
2449                                         WebStorage webStorage = WebStorage.getInstance();
2450                                         webStorage.deleteAllData();
2451
2452                                         // Manually delete the DOM storage files and directories.
2453                                         try {
2454                                             // A `String[]` must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
2455                                             privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
2456
2457                                             // Multiple commands must be used because `Runtime.exec()` does not like `*`.
2458                                             privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
2459                                             privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
2460                                             privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
2461                                             privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
2462                                         } catch (IOException e) {
2463                                             // Do nothing if an error is thrown.
2464                                         }
2465                                 }
2466                             }
2467                         })
2468                         .show();
2469                 return true;
2470
2471             // Form data can be remove once the minimum API >= 26.
2472             case R.id.clear_form_data:
2473                 Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_deleted, Snackbar.LENGTH_LONG)
2474                         .setAction(R.string.undo, v -> {
2475                             // Do nothing because everything will be handled by `onDismissed()` below.
2476                         })
2477                         .addCallback(new Snackbar.Callback() {
2478                             @Override
2479                             public void onDismissed(Snackbar snackbar, int event) {
2480                                 switch (event) {
2481                                     // The user pushed the `Undo` button.
2482                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
2483                                         // Do nothing.
2484                                         break;
2485
2486                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
2487                                     default:
2488                                         // Delete the form data.
2489                                         WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
2490                                         mainWebViewDatabase.clearFormData();
2491                                 }
2492                             }
2493                         })
2494                         .show();
2495                 return true;
2496
2497             case R.id.easylist:
2498                 // Toggle the EasyList status.
2499                 easyListEnabled = !easyListEnabled;
2500
2501                 // Update the menu checkbox.
2502                 menuItem.setChecked(easyListEnabled);
2503
2504                 // Reload the main WebView.
2505                 mainWebView.reload();
2506                 return true;
2507
2508             case R.id.easyprivacy:
2509                 // Toggle the EasyPrivacy status.
2510                 easyPrivacyEnabled = !easyPrivacyEnabled;
2511
2512                 // Update the menu checkbox.
2513                 menuItem.setChecked(easyPrivacyEnabled);
2514
2515                 // Reload the main WebView.
2516                 mainWebView.reload();
2517                 return true;
2518
2519             case R.id.fanboys_annoyance_list:
2520                 // Toggle Fanboy's Annoyance List status.
2521                 fanboysAnnoyanceListEnabled = !fanboysAnnoyanceListEnabled;
2522
2523                 // Update the menu checkbox.
2524                 menuItem.setChecked(fanboysAnnoyanceListEnabled);
2525
2526                 // Update the staus of Fanboy's Social Blocking List.
2527                 MenuItem fanboysSocialBlockingListMenuItem = mainMenu.findItem(R.id.fanboys_social_blocking_list);
2528                 fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListEnabled);
2529
2530                 // Reload the main WebView.
2531                 mainWebView.reload();
2532                 return true;
2533
2534             case R.id.fanboys_social_blocking_list:
2535                 // Toggle Fanboy's Social Blocking List status.
2536                 fanboysSocialBlockingListEnabled = !fanboysSocialBlockingListEnabled;
2537
2538                 // Update the menu checkbox.
2539                 menuItem.setChecked(fanboysSocialBlockingListEnabled);
2540
2541                 // Reload the main WebView.
2542                 mainWebView.reload();
2543                 return true;
2544
2545             case R.id.ultraprivacy:
2546                 // Toggle the UltraPrivacy status.
2547                 ultraPrivacyEnabled = !ultraPrivacyEnabled;
2548
2549                 // Update the menu checkbox.
2550                 menuItem.setChecked(ultraPrivacyEnabled);
2551
2552                 // Reload the main WebView.
2553                 mainWebView.reload();
2554                 return true;
2555
2556             case R.id.block_all_third_party_requests:
2557                 //Toggle the third-party requests blocker status.
2558                 blockAllThirdPartyRequests = !blockAllThirdPartyRequests;
2559
2560                 // Update the menu checkbox.
2561                 menuItem.setChecked(blockAllThirdPartyRequests);
2562
2563                 // Reload the main WebView.
2564                 mainWebView.reload();
2565                 return true;
2566
2567             case R.id.user_agent_privacy_browser:
2568                 // Update the user agent.
2569                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
2570
2571                 // Reload the WebView.
2572                 mainWebView.reload();
2573                 return true;
2574
2575             case R.id.user_agent_webview_default:
2576                 // Update the user agent.
2577                 mainWebView.getSettings().setUserAgentString("");
2578
2579                 // Reload the WebView.
2580                 mainWebView.reload();
2581                 return true;
2582
2583             case R.id.user_agent_firefox_on_android:
2584                 // Update the user agent.
2585                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
2586
2587                 // Reload the WebView.
2588                 mainWebView.reload();
2589                 return true;
2590
2591             case R.id.user_agent_chrome_on_android:
2592                 // Update the user agent.
2593                 mainWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);