Fix a crash when uploading files to some sites. https://redmine.stoutner.com/issues/556
[PrivacyBrowser.git] / app / src / main / java / com / stoutner / privacybrowser / activities / MainWebViewActivity.java
1 /*
2  * Copyright © 2015-2020 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.Dialog;
28 import android.app.DownloadManager;
29 import android.app.SearchManager;
30 import android.content.ActivityNotFoundException;
31 import android.content.BroadcastReceiver;
32 import android.content.ClipData;
33 import android.content.ClipboardManager;
34 import android.content.Context;
35 import android.content.Intent;
36 import android.content.IntentFilter;
37 import android.content.SharedPreferences;
38 import android.content.pm.PackageManager;
39 import android.content.res.Configuration;
40 import android.database.Cursor;
41 import android.graphics.Bitmap;
42 import android.graphics.BitmapFactory;
43 import android.graphics.Typeface;
44 import android.graphics.drawable.BitmapDrawable;
45 import android.graphics.drawable.Drawable;
46 import android.net.Uri;
47 import android.net.http.SslCertificate;
48 import android.net.http.SslError;
49 import android.os.Build;
50 import android.os.Bundle;
51 import android.os.Handler;
52 import android.os.Message;
53 import android.preference.PreferenceManager;
54 import android.print.PrintDocumentAdapter;
55 import android.print.PrintManager;
56 import android.text.Editable;
57 import android.text.Spanned;
58 import android.text.TextWatcher;
59 import android.text.style.ForegroundColorSpan;
60 import android.util.Patterns;
61 import android.view.ContextMenu;
62 import android.view.GestureDetector;
63 import android.view.KeyEvent;
64 import android.view.Menu;
65 import android.view.MenuItem;
66 import android.view.MotionEvent;
67 import android.view.View;
68 import android.view.ViewGroup;
69 import android.view.WindowManager;
70 import android.view.inputmethod.InputMethodManager;
71 import android.webkit.CookieManager;
72 import android.webkit.HttpAuthHandler;
73 import android.webkit.SslErrorHandler;
74 import android.webkit.ValueCallback;
75 import android.webkit.WebBackForwardList;
76 import android.webkit.WebChromeClient;
77 import android.webkit.WebResourceResponse;
78 import android.webkit.WebSettings;
79 import android.webkit.WebStorage;
80 import android.webkit.WebView;
81 import android.webkit.WebViewClient;
82 import android.webkit.WebViewDatabase;
83 import android.widget.ArrayAdapter;
84 import android.widget.CursorAdapter;
85 import android.widget.EditText;
86 import android.widget.FrameLayout;
87 import android.widget.ImageView;
88 import android.widget.LinearLayout;
89 import android.widget.ListView;
90 import android.widget.ProgressBar;
91 import android.widget.RadioButton;
92 import android.widget.RelativeLayout;
93 import android.widget.TextView;
94
95 import androidx.annotation.NonNull;
96 import androidx.appcompat.app.ActionBar;
97 import androidx.appcompat.app.ActionBarDrawerToggle;
98 import androidx.appcompat.app.AppCompatActivity;
99 import androidx.appcompat.widget.Toolbar;
100 import androidx.coordinatorlayout.widget.CoordinatorLayout;
101 import androidx.core.app.ActivityCompat;
102 import androidx.core.content.ContextCompat;
103 import androidx.core.view.GravityCompat;
104 import androidx.drawerlayout.widget.DrawerLayout;
105 import androidx.fragment.app.DialogFragment;
106 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
107 import androidx.viewpager.widget.ViewPager;
108
109 import com.google.android.material.appbar.AppBarLayout;
110 import com.google.android.material.floatingactionbutton.FloatingActionButton;
111 import com.google.android.material.navigation.NavigationView;
112 import com.google.android.material.snackbar.Snackbar;
113 import com.google.android.material.tabs.TabLayout;
114
115 import com.stoutner.privacybrowser.BuildConfig;
116 import com.stoutner.privacybrowser.R;
117 import com.stoutner.privacybrowser.adapters.WebViewPagerAdapter;
118 import com.stoutner.privacybrowser.asynctasks.GetHostIpAddresses;
119 import com.stoutner.privacybrowser.asynctasks.PopulateBlocklists;
120 import com.stoutner.privacybrowser.asynctasks.PrepareSaveDialog;
121 import com.stoutner.privacybrowser.asynctasks.SaveUrl;
122 import com.stoutner.privacybrowser.asynctasks.SaveWebpageImage;
123 import com.stoutner.privacybrowser.dialogs.AdConsentDialog;
124 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
125 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
126 import com.stoutner.privacybrowser.dialogs.CreateHomeScreenShortcutDialog;
127 import com.stoutner.privacybrowser.dialogs.EditBookmarkDialog;
128 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
129 import com.stoutner.privacybrowser.dialogs.FontSizeDialog;
130 import com.stoutner.privacybrowser.dialogs.HttpAuthenticationDialog;
131 import com.stoutner.privacybrowser.dialogs.OpenDialog;
132 import com.stoutner.privacybrowser.dialogs.ProxyNotInstalledDialog;
133 import com.stoutner.privacybrowser.dialogs.PinnedMismatchDialog;
134 import com.stoutner.privacybrowser.dialogs.SaveDialog;
135 import com.stoutner.privacybrowser.dialogs.SslCertificateErrorDialog;
136 import com.stoutner.privacybrowser.dialogs.StoragePermissionDialog;
137 import com.stoutner.privacybrowser.dialogs.UrlHistoryDialog;
138 import com.stoutner.privacybrowser.dialogs.ViewSslCertificateDialog;
139 import com.stoutner.privacybrowser.dialogs.WaitingForProxyDialog;
140 import com.stoutner.privacybrowser.fragments.WebViewTabFragment;
141 import com.stoutner.privacybrowser.helpers.AdHelper;
142 import com.stoutner.privacybrowser.helpers.BlocklistHelper;
143 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
144 import com.stoutner.privacybrowser.helpers.CheckPinnedMismatchHelper;
145 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
146 import com.stoutner.privacybrowser.helpers.FileNameHelper;
147 import com.stoutner.privacybrowser.helpers.ProxyHelper;
148 import com.stoutner.privacybrowser.views.NestedScrollWebView;
149
150 import java.io.ByteArrayInputStream;
151 import java.io.ByteArrayOutputStream;
152 import java.io.File;
153 import java.io.IOException;
154 import java.io.UnsupportedEncodingException;
155 import java.net.MalformedURLException;
156 import java.net.URL;
157 import java.net.URLDecoder;
158 import java.net.URLEncoder;
159 import java.text.NumberFormat;
160 import java.util.ArrayList;
161 import java.util.Date;
162 import java.util.HashMap;
163 import java.util.HashSet;
164 import java.util.List;
165 import java.util.Map;
166 import java.util.Objects;
167 import java.util.Set;
168
169 public class MainWebViewActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener,
170         EditBookmarkDialog.EditBookmarkListener, EditBookmarkFolderDialog.EditBookmarkFolderListener, FontSizeDialog.UpdateFontSizeListener, NavigationView.OnNavigationItemSelectedListener,
171         OpenDialog.OpenListener, PinnedMismatchDialog.PinnedMismatchListener, PopulateBlocklists.PopulateBlocklistsListener, SaveDialog.SaveWebpageListener,
172         StoragePermissionDialog.StoragePermissionDialogListener, UrlHistoryDialog.NavigateHistoryListener, WebViewTabFragment.NewTabListener {
173
174     // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()`, `onResume()`, and `applyProxy()`.
175     public static String orbotStatus = "unknown";
176
177     // The WebView pager adapter is accessed from `HttpAuthenticationDialog`, `PinnedMismatchDialog`, and `SslCertificateErrorDialog`.  It is also used in `onCreate()`, `onResume()`, and `addTab()`.
178     public static WebViewPagerAdapter webViewPagerAdapter;
179
180     // The load URL on restart variables are public static so they can be accessed from `BookmarksActivity`.  They are used in `onRestart()`.
181     public static boolean loadUrlOnRestart;
182     public static String urlToLoadOnRestart;
183
184     // `restartFromBookmarksActivity` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onRestart()`.
185     public static boolean restartFromBookmarksActivity;
186
187     // `currentBookmarksFolder` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onCreate()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`,
188     // `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
189     public static String currentBookmarksFolder;
190
191     // The user agent constants are public static so they can be accessed from `SettingsFragment`, `DomainsActivity`, and `DomainSettingsFragment`.
192     public final static int UNRECOGNIZED_USER_AGENT = -1;
193     public final static int SETTINGS_WEBVIEW_DEFAULT_USER_AGENT = 1;
194     public final static int SETTINGS_CUSTOM_USER_AGENT = 12;
195     public final static int DOMAINS_SYSTEM_DEFAULT_USER_AGENT = 0;
196     public final static int DOMAINS_WEBVIEW_DEFAULT_USER_AGENT = 2;
197     public final static int DOMAINS_CUSTOM_USER_AGENT = 13;
198
199     // Start activity for result request codes.  The public static entries are accessed from `OpenDialog()` and `SaveWebpageDialog()`.
200     public final static int BROWSE_OPEN_REQUEST_CODE = 0;
201     public final static int BROWSE_SAVE_WEBPAGE_REQUEST_CODE = 1;
202     private final int BROWSE_FILE_UPLOAD_REQUEST_CODE = 2;
203
204     // The proxy mode is public static so it can be accessed from `ProxyHelper()`.
205     // It is also used in `onRestart()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `applyAppSettings()`, and `applyProxy()`.
206     // It will be updated in `applyAppSettings()`, but it needs to be initialized here or the first run of `onPrepareOptionsMenu()` crashes.
207     public static String proxyMode = ProxyHelper.NONE;
208
209
210     // The permission result request codes are used in `onCreateContextMenu()`, `onRequestPermissionResult()`, `onSaveWebpage()`, `onCloseStoragePermissionDialog()`, and `initializeWebView()`.
211     private final int PERMISSION_OPEN_REQUEST_CODE = 0;
212     private final int PERMISSION_SAVE_URL_REQUEST_CODE = 1;
213     private final int PERMISSION_SAVE_AS_ARCHIVE_REQUEST_CODE = 2;
214     private final int PERMISSION_SAVE_AS_IMAGE_REQUEST_CODE = 3;
215
216     // The current WebView is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`,
217     // `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`, `onSslMismatchBack()`, `applyProxy()`, and `applyDomainSettings()`.
218     private NestedScrollWebView currentWebView;
219
220     // `customHeader` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateContextMenu()`, and `loadUrl()`.
221     private final Map<String, String> customHeaders = new HashMap<>();
222
223     // The search URL is set in `applyAppSettings()` and used in `onNewIntent()`, `loadUrlFromTextBox()`, `initializeApp()`, and `initializeWebView()`.
224     private String searchURL;
225
226     // The options menu is set in `onCreateOptionsMenu()` and used in `onOptionsItemSelected()`, `updatePrivacyIcons()`, and `initializeWebView()`.
227     private Menu optionsMenu;
228
229     // The blocklists are populated in `finishedPopulatingBlocklists()` and accessed from `initializeWebView()`.
230     private ArrayList<List<String[]>> easyList;
231     private ArrayList<List<String[]>> easyPrivacy;
232     private ArrayList<List<String[]>> fanboysAnnoyanceList;
233     private ArrayList<List<String[]>> fanboysSocialList;
234     private ArrayList<List<String[]>> ultraList;
235     private ArrayList<List<String[]>> ultraPrivacy;
236
237     // `webViewDefaultUserAgent` is used in `onCreate()` and `onPrepareOptionsMenu()`.
238     private String webViewDefaultUserAgent;
239
240     // The incognito mode is set in `applyAppSettings()` and used in `initializeWebView()`.
241     private boolean incognitoModeEnabled;
242
243     // The full screen browsing mode tracker is set it `applyAppSettings()` and used in `initializeWebView()`.
244     private boolean fullScreenBrowsingModeEnabled;
245
246     // `inFullScreenBrowsingMode` is used in `onCreate()`, `onConfigurationChanged()`, and `applyAppSettings()`.
247     private boolean inFullScreenBrowsingMode;
248
249     // The app bar trackers are set in `applyAppSettings()` and used in `initializeWebView()`.
250     private boolean hideAppBar;
251     private boolean scrollAppBar;
252
253     // The loading new intent tracker is set in `onNewIntent()` and used in `setCurrentWebView()`.
254     private boolean loadingNewIntent;
255
256     // `reapplyDomainSettingsOnRestart` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, and `onAddDomain()`, .
257     private boolean reapplyDomainSettingsOnRestart;
258
259     // `reapplyAppSettingsOnRestart` is used in `onNavigationItemSelected()` and `onRestart()`.
260     private boolean reapplyAppSettingsOnRestart;
261
262     // `displayingFullScreenVideo` is used in `onCreate()` and `onResume()`.
263     private boolean displayingFullScreenVideo;
264
265     // `orbotStatusBroadcastReceiver` is used in `onCreate()` and `onDestroy()`.
266     private BroadcastReceiver orbotStatusBroadcastReceiver;
267
268     // The waiting for proxy boolean is used in `onResume()`, `initializeApp()` and `applyProxy()`.
269     private boolean waitingForProxy = false;
270
271     // The action bar drawer toggle is initialized in `onCreate()` and used in `onResume()`.
272     private ActionBarDrawerToggle actionBarDrawerToggle;
273
274     // The color spans are used in `onCreate()` and `highlightUrlText()`.
275     private ForegroundColorSpan redColorSpan;
276     private ForegroundColorSpan initialGrayColorSpan;
277     private ForegroundColorSpan finalGrayColorSpan;
278
279     // The drawer header padding variables are used in `onCreate()` and `onConfigurationChanged()`.
280     private int drawerHeaderPaddingLeftAndRight;
281     private int drawerHeaderPaddingTop;
282     private int drawerHeaderPaddingBottom;
283
284     // `bookmarksDatabaseHelper` is used in `onCreate()`, `onDestroy`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`,
285     // and `loadBookmarksFolder()`.
286     private BookmarksDatabaseHelper bookmarksDatabaseHelper;
287
288     // `bookmarksCursor` is used in `onDestroy()`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
289     private Cursor bookmarksCursor;
290
291     // `bookmarksCursorAdapter` is used in `onCreateBookmark()`, `onCreateBookmarkFolder()` `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
292     private CursorAdapter bookmarksCursorAdapter;
293
294     // `oldFolderNameString` is used in `onCreate()` and `onSaveEditBookmarkFolder()`.
295     private String oldFolderNameString;
296
297     // `fileChooserCallback` is used in `onCreate()` and `onActivityResult()`.
298     private ValueCallback<Uri[]> fileChooserCallback;
299
300     // The default progress view offsets are set in `onCreate()` and used in `initializeWebView()`.
301     private int defaultProgressViewStartOffset;
302     private int defaultProgressViewEndOffset;
303
304     // The swipe refresh layout top padding is used when exiting full screen browsing mode.  It is used in an inner class in `initializeWebView()`.
305     private int swipeRefreshLayoutPaddingTop;
306
307     // The URL sanitizers are set in `applyAppSettings()` and used in `sanitizeUrl()`.
308     private boolean sanitizeGoogleAnalytics;
309     private boolean sanitizeFacebookClickIds;
310     private boolean sanitizeTwitterAmpRedirects;
311
312     // The file path strings are used in `onSaveWebpage()` and `onRequestPermissionResult()`
313     private String openFilePath;
314     private String saveWebpageUrl;
315     private String saveWebpageFilePath;
316
317     @Override
318     // Remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
319     @SuppressLint("ClickableViewAccessibility")
320     protected void onCreate(Bundle savedInstanceState) {
321         // Enable the drawing of the entire webpage.  This makes it possible to save a website image.  This must be done before anything else happens with the WebView.
322         if (Build.VERSION.SDK_INT >= 21) {
323             WebView.enableSlowWholeDocumentDraw();
324         }
325
326         // Initialize the default preference values the first time the program is run.  `false` keeps this command from resetting any current preferences back to default.
327         PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
328
329         // Get a handle for the shared preferences.
330         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
331
332         // Get the theme and screenshot preferences.
333         boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
334         boolean allowScreenshots = sharedPreferences.getBoolean("allow_screenshots", false);
335
336         // Disable screenshots if not allowed.
337         if (!allowScreenshots) {
338             getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
339         }
340
341         // Set the activity theme.
342         if (darkTheme) {
343             setTheme(R.style.PrivacyBrowserDark);
344         } else {
345             setTheme(R.style.PrivacyBrowserLight);
346         }
347
348         // Run the default commands.
349         super.onCreate(savedInstanceState);
350
351         // Set the content view.
352         setContentView(R.layout.main_framelayout);
353
354         // Get handles for the views that need to be modified.
355         DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
356         Toolbar toolbar = findViewById(R.id.toolbar);
357         ViewPager webViewPager = findViewById(R.id.webviewpager);
358
359         // Set the action bar.  `SupportActionBar` must be used until the minimum API is >= 21.
360         setSupportActionBar(toolbar);
361
362         // Get a handle for the action bar.
363         ActionBar actionBar = getSupportActionBar();
364
365         // This is needed to get rid of the Android Studio warning that the action bar might be null.
366         assert actionBar != null;
367
368         // Add the custom layout, which shows the URL text bar.
369         actionBar.setCustomView(R.layout.url_app_bar);
370         actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
371
372         // Initially disable the sliding drawers.  They will be enabled once the blocklists are loaded.
373         drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
374
375         // Create the hamburger icon at the start of the AppBar.
376         actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.open_navigation_drawer, R.string.close_navigation_drawer);
377
378         // Initialize the web view pager adapter.
379         webViewPagerAdapter = new WebViewPagerAdapter(getSupportFragmentManager());
380
381         // Set the pager adapter on the web view pager.
382         webViewPager.setAdapter(webViewPagerAdapter);
383
384         // Store up to 100 tabs in memory.
385         webViewPager.setOffscreenPageLimit(100);
386
387         // Populate the blocklists.
388         new PopulateBlocklists(this, this).execute();
389     }
390
391     @Override
392     protected void onNewIntent(Intent intent) {
393         // Run the default commands.
394         super.onNewIntent(intent);
395
396         // Replace the intent that started the app with this one.
397         setIntent(intent);
398
399         // Process the intent here if Privacy Browser is fully initialized.  If the process has been killed by the system while sitting in the background, this will be handled in `initializeWebView()`.
400         if (ultraPrivacy != null) {
401             // Get the information from the intent.
402             String intentAction = intent.getAction();
403             Uri intentUriData = intent.getData();
404
405             // Determine if this is a web search.
406             boolean isWebSearch = ((intentAction != null) && intentAction.equals(Intent.ACTION_WEB_SEARCH));
407
408             // Only process the URI if it contains data or it is a web search.  If the user pressed the desktop icon after the app was already running the URI will be null.
409             if (intentUriData != null || isWebSearch) {
410                 // Get the shared preferences.
411                 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
412
413                 // Create a URL string.
414                 String url;
415
416                 // If the intent action is a web search, perform the search.
417                 if (isWebSearch) {
418                     // Create an encoded URL string.
419                     String encodedUrlString;
420
421                     // Sanitize the search input and convert it to a search.
422                     try {
423                         encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
424                     } catch (UnsupportedEncodingException exception) {
425                         encodedUrlString = "";
426                     }
427
428                     // Add the base search URL.
429                     url = searchURL + encodedUrlString;
430                 } else {  // The intent should contain a URL.
431                     // Set the intent data as the URL.
432                     url = intentUriData.toString();
433                 }
434
435                 // Add a new tab if specified in the preferences.
436                 if (sharedPreferences.getBoolean("open_intents_in_new_tab", true)) {  // Load the URL in a new tab.
437                     // Set the loading new intent flag.
438                     loadingNewIntent = true;
439
440                     // Add a new tab.
441                     addNewTab(url, true);
442                 } else {  // Load the URL in the current tab.
443                     // Make it so.
444                     loadUrl(currentWebView, url);
445                 }
446
447                 // Get a handle for the drawer layout.
448                 DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
449
450                 // Close the navigation drawer if it is open.
451                 if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
452                     drawerLayout.closeDrawer(GravityCompat.START);
453                 }
454
455                 // Close the bookmarks drawer if it is open.
456                 if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
457                     drawerLayout.closeDrawer(GravityCompat.END);
458                 }
459             }
460         }
461     }
462
463     @Override
464     public void onRestart() {
465         // Run the default commands.
466         super.onRestart();
467
468         // Apply the app settings if returning from the Settings activity.
469         if (reapplyAppSettingsOnRestart) {
470             // Reset the reapply app settings on restart tracker.
471             reapplyAppSettingsOnRestart = false;
472
473             // Apply the app settings.
474             applyAppSettings();
475         }
476
477         // Apply the domain settings if returning from the settings or domains activity.
478         if (reapplyDomainSettingsOnRestart) {
479             // Reset the reapply domain settings on restart tracker.
480             reapplyDomainSettingsOnRestart = false;
481
482             // Reapply the domain settings for each tab.
483             for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
484                 // Get the WebView tab fragment.
485                 WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
486
487                 // Get the fragment view.
488                 View fragmentView = webViewTabFragment.getView();
489
490                 // Only reload the WebViews if they exist.
491                 if (fragmentView != null) {
492                     // Get the nested scroll WebView from the tab fragment.
493                     NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
494
495                     // Reset the current domain name so the domain settings will be reapplied.
496                     nestedScrollWebView.resetCurrentDomainName();
497
498                     // Reapply the domain settings if the URL is not null, which can happen if an empty tab is active when returning from settings.
499                     if (nestedScrollWebView.getUrl() != null) {
500                         applyDomainSettings(nestedScrollWebView, nestedScrollWebView.getUrl(), false, true);
501                     }
502                 }
503             }
504         }
505
506         // Load the URL on restart (used when loading a bookmark).
507         if (loadUrlOnRestart) {
508             // Load the specified URL.
509             loadUrl(currentWebView, urlToLoadOnRestart);
510
511             // Reset the load on restart tracker.
512             loadUrlOnRestart = false;
513         }
514
515         // Update the bookmarks drawer if returning from the Bookmarks activity.
516         if (restartFromBookmarksActivity) {
517             // Get a handle for the drawer layout.
518             DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
519
520             // Close the bookmarks drawer.
521             drawerLayout.closeDrawer(GravityCompat.END);
522
523             // Reload the bookmarks drawer.
524             loadBookmarksFolder();
525
526             // Reset `restartFromBookmarksActivity`.
527             restartFromBookmarksActivity = false;
528         }
529
530         // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
531         updatePrivacyIcons(true);
532     }
533
534     // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
535     @Override
536     public void onResume() {
537         // Run the default commands.
538         super.onResume();
539
540         // Resume any WebViews.
541         for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
542             // Get the WebView tab fragment.
543             WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
544
545             // Get the fragment view.
546             View fragmentView = webViewTabFragment.getView();
547
548             // Only resume the WebViews if they exist (they won't when the app is first created).
549             if (fragmentView != null) {
550                 // Get the nested scroll WebView from the tab fragment.
551                 NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
552
553                 // Resume the nested scroll WebView JavaScript timers.
554                 nestedScrollWebView.resumeTimers();
555
556                 // Resume the nested scroll WebView.
557                 nestedScrollWebView.onResume();
558             }
559         }
560
561         // Reapply the proxy settings if the system is using a proxy.  This redisplays the appropriate alert dialog.
562         if (!proxyMode.equals(ProxyHelper.NONE)) {
563             applyProxy(false);
564         }
565
566         // Reapply any system UI flags and the ad in the free flavor.
567         if (displayingFullScreenVideo || inFullScreenBrowsingMode) {  // The system is displaying a website or a video in full screen mode.
568             // Get a handle for the root frame layouts.
569             FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
570
571             // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
572             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
573
574             /* Hide the system bars.
575              * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
576              * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
577              * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
578              * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
579              */
580             rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
581                     View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
582         } else if (BuildConfig.FLAVOR.contentEquals("free")) {  // The system in not in full screen mode.
583             // Resume the ad.
584             AdHelper.resumeAd(findViewById(R.id.adview));
585         }
586     }
587
588     @Override
589     public void onPause() {
590         // Run the default commands.
591         super.onPause();
592
593         for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
594             // Get the WebView tab fragment.
595             WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
596
597             // Get the fragment view.
598             View fragmentView = webViewTabFragment.getView();
599
600             // Only pause the WebViews if they exist (they won't when the app is first created).
601             if (fragmentView != null) {
602                 // Get the nested scroll WebView from the tab fragment.
603                 NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
604
605                 // Pause the nested scroll WebView.
606                 nestedScrollWebView.onPause();
607
608                 // Pause the nested scroll WebView JavaScript timers.
609                 nestedScrollWebView.pauseTimers();
610             }
611         }
612
613         // Pause the ad or it will continue to consume resources in the background on the free flavor.
614         if (BuildConfig.FLAVOR.contentEquals("free")) {
615             // Pause the ad.
616             AdHelper.pauseAd(findViewById(R.id.adview));
617         }
618     }
619
620     @Override
621     public void onDestroy() {
622         // Unregister the orbot status broadcast receiver.
623         this.unregisterReceiver(orbotStatusBroadcastReceiver);
624
625         // Close the bookmarks cursor and database.
626         bookmarksCursor.close();
627         bookmarksDatabaseHelper.close();
628
629         // Run the default commands.
630         super.onDestroy();
631     }
632
633     @Override
634     public boolean onCreateOptionsMenu(Menu menu) {
635         // Inflate the menu.  This adds items to the action bar if it is present.
636         getMenuInflater().inflate(R.menu.webview_options_menu, menu);
637
638         // Store a handle for the options menu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons()`.
639         optionsMenu = menu;
640
641         // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
642         updatePrivacyIcons(false);
643
644         // Get handles for the menu items.
645         MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
646         MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
647         MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
648         MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
649         MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
650         MenuItem refreshMenuItem = menu.findItem(R.id.refresh);
651         MenuItem adConsentMenuItem = menu.findItem(R.id.ad_consent);
652
653         // Only display third-party cookies if API >= 21
654         toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
655
656         // Only display the form data menu items if the API < 26.
657         toggleSaveFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
658         clearFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
659
660         // Disable the clear form data menu item if the API >= 26 so that the status of the main Clear Data is calculated correctly.
661         clearFormDataMenuItem.setEnabled(Build.VERSION.SDK_INT < 26);
662
663         // Only show Ad Consent if this is the free flavor.
664         adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
665
666         // Get the shared preferences.
667         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
668
669         // Get the dark theme and app bar preferences..
670         boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
671         boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
672
673         // 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.
674         if (displayAdditionalAppBarIcons) {
675             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
676             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
677             refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
678         } else { //Do not display the additional icons.
679             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
680             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
681             refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
682         }
683
684         // Replace Refresh with Stop if a URL is already loading.
685         if (currentWebView != null && currentWebView.getProgress() != 100) {
686             // Set the title.
687             refreshMenuItem.setTitle(R.string.stop);
688
689             // If the icon is displayed in the AppBar, set it according to the theme.
690             if (displayAdditionalAppBarIcons) {
691                 if (darkTheme) {
692                     refreshMenuItem.setIcon(R.drawable.close_dark);
693                 } else {
694                     refreshMenuItem.setIcon(R.drawable.close_light);
695                 }
696             }
697         }
698
699         // Done.
700         return true;
701     }
702
703     @Override
704     public boolean onPrepareOptionsMenu(Menu menu) {
705         // Get handles for the menu items.
706         MenuItem addOrEditDomain = menu.findItem(R.id.add_or_edit_domain);
707         MenuItem firstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
708         MenuItem thirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
709         MenuItem domStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
710         MenuItem saveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
711         MenuItem clearDataMenuItem = menu.findItem(R.id.clear_data);
712         MenuItem clearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
713         MenuItem clearDOMStorageMenuItem = menu.findItem(R.id.clear_dom_storage);
714         MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
715         MenuItem blocklistsMenuItem = menu.findItem(R.id.blocklists);
716         MenuItem easyListMenuItem = menu.findItem(R.id.easylist);
717         MenuItem easyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
718         MenuItem fanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
719         MenuItem fanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
720         MenuItem ultraListMenuItem = menu.findItem(R.id.ultralist);
721         MenuItem ultraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
722         MenuItem blockAllThirdPartyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
723         MenuItem proxyMenuItem = menu.findItem(R.id.proxy);
724         MenuItem userAgentMenuItem = menu.findItem(R.id.user_agent);
725         MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
726         MenuItem swipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
727         MenuItem wideViewportMenuItem = menu.findItem(R.id.wide_viewport);
728         MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
729         MenuItem nightModeMenuItem = menu.findItem(R.id.night_mode);
730
731         // Get a handle for the cookie manager.
732         CookieManager cookieManager = CookieManager.getInstance();
733
734         // Initialize the current user agent string and the font size.
735         String currentUserAgent = getString(R.string.user_agent_privacy_browser);
736         int fontSize = 100;
737
738         // Set items that require the current web view to be populated.  It will be null when the program is first opened, as `onPrepareOptionsMenu()` is called before the first WebView is initialized.
739         if (currentWebView != null) {
740             // Set the add or edit domain text.
741             if (currentWebView.getDomainSettingsApplied()) {
742                 addOrEditDomain.setTitle(R.string.edit_domain_settings);
743             } else {
744                 addOrEditDomain.setTitle(R.string.add_domain_settings);
745             }
746
747             // Get the current user agent from the WebView.
748             currentUserAgent = currentWebView.getSettings().getUserAgentString();
749
750             // Get the current font size from the
751             fontSize = currentWebView.getSettings().getTextZoom();
752
753             // Set the status of the menu item checkboxes.
754             domStorageMenuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
755             saveFormDataMenuItem.setChecked(currentWebView.getSettings().getSaveFormData());  // Form data can be removed once the minimum API >= 26.
756             easyListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
757             easyPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
758             fanboysAnnoyanceListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
759             fanboysSocialBlockingListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
760             ultraListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
761             ultraPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
762             blockAllThirdPartyRequestsMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
763             swipeToRefreshMenuItem.setChecked(currentWebView.getSwipeToRefresh());
764             wideViewportMenuItem.setChecked(currentWebView.getSettings().getUseWideViewPort());
765             displayImagesMenuItem.setChecked(currentWebView.getSettings().getLoadsImagesAutomatically());
766             nightModeMenuItem.setChecked(currentWebView.getNightMode());
767
768             // Initialize the display names for the blocklists with the number of blocked requests.
769             blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + currentWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
770             easyListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASYLIST) + " - " + getString(R.string.easylist));
771             easyPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASYPRIVACY) + " - " + getString(R.string.easyprivacy));
772             fanboysAnnoyanceListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST) + " - " + getString(R.string.fanboys_annoyance_list));
773             fanboysSocialBlockingListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST) + " - " + getString(R.string.fanboys_social_blocking_list));
774             ultraListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.ULTRALIST) + " - " + getString(R.string.ultralist));
775             ultraPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.ULTRAPRIVACY) + " - " + getString(R.string.ultraprivacy));
776             blockAllThirdPartyRequestsMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS) + " - " + getString(R.string.block_all_third_party_requests));
777
778             // Only modify third-party cookies if the API >= 21.
779             if (Build.VERSION.SDK_INT >= 21) {
780                 // Set the status of the third-party cookies checkbox.
781                 thirdPartyCookiesMenuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
782
783                 // Enable third-party cookies if first-party cookies are enabled.
784                 thirdPartyCookiesMenuItem.setEnabled(cookieManager.acceptCookie());
785             }
786
787             // Enable DOM Storage if JavaScript is enabled.
788             domStorageMenuItem.setEnabled(currentWebView.getSettings().getJavaScriptEnabled());
789         }
790
791         // Set the checked status of the first party cookies menu item.
792         firstPartyCookiesMenuItem.setChecked(cookieManager.acceptCookie());
793
794         // Enable Clear Cookies if there are any.
795         clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
796
797         // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`, which links to `/data/data/com.stoutner.privacybrowser.standard`.
798         String privateDataDirectoryString = getApplicationInfo().dataDir;
799
800         // Get a count of the number of files in the Local Storage directory.
801         File localStorageDirectory = new File (privateDataDirectoryString + "/app_webview/Local Storage/");
802         int localStorageDirectoryNumberOfFiles = 0;
803         if (localStorageDirectory.exists()) {
804             // `Objects.requireNonNull` removes a lint warning that `localStorageDirectory.list` might produce a null pointed exception if it is dereferenced.
805             localStorageDirectoryNumberOfFiles = Objects.requireNonNull(localStorageDirectory.list()).length;
806         }
807
808         // Get a count of the number of files in the IndexedDB directory.
809         File indexedDBDirectory = new File (privateDataDirectoryString + "/app_webview/IndexedDB");
810         int indexedDBDirectoryNumberOfFiles = 0;
811         if (indexedDBDirectory.exists()) {
812             // `Objects.requireNonNull` removes a lint warning that `indexedDBDirectory.list` might produce a null pointed exception if it is dereferenced.
813             indexedDBDirectoryNumberOfFiles = Objects.requireNonNull(indexedDBDirectory.list()).length;
814         }
815
816         // Enable Clear DOM Storage if there is any.
817         clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
818
819         // Enable Clear Form Data is there is any.  This can be removed once the minimum API >= 26.
820         if (Build.VERSION.SDK_INT < 26) {
821             // Get the WebView database.
822             WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
823
824             // Enable the clear form data menu item if there is anything to clear.
825             clearFormDataMenuItem.setEnabled(webViewDatabase.hasFormData());
826         }
827
828         // Enable Clear Data if any of the submenu items are enabled.
829         clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
830
831         // Disable Fanboy's Social Blocking List menu item if Fanboy's Annoyance List is checked.
832         fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListMenuItem.isChecked());
833
834         // Set the proxy title and check the applied proxy.
835         switch (proxyMode) {
836             case ProxyHelper.NONE:
837                 // Set the proxy title.
838                 proxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_none));
839
840                 // Check the proxy None radio button.
841                 menu.findItem(R.id.proxy_none).setChecked(true);
842                 break;
843
844             case ProxyHelper.TOR:
845                 // Set the proxy title.
846                 proxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_tor));
847
848                 // Check the proxy Tor radio button.
849                 menu.findItem(R.id.proxy_tor).setChecked(true);
850                 break;
851
852             case ProxyHelper.I2P:
853                 // Set the proxy title.
854                 proxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_i2p));
855
856                 // Check the proxy I2P radio button.
857                 menu.findItem(R.id.proxy_i2p).setChecked(true);
858                 break;
859
860             case ProxyHelper.CUSTOM:
861                 // Set the proxy title.
862                 proxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_custom));
863
864                 // Check the proxy Custom radio button.
865                 menu.findItem(R.id.proxy_custom).setChecked(true);
866                 break;
867         }
868
869         // Select the current user agent menu item.  A switch statement cannot be used because the user agents are not compile time constants.
870         if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[0])) {  // Privacy Browser.
871             // Update the user agent menu item title.
872             userAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_privacy_browser));
873
874             // Select the Privacy Browser radio box.
875             menu.findItem(R.id.user_agent_privacy_browser).setChecked(true);
876         } else if (currentUserAgent.equals(webViewDefaultUserAgent)) {  // WebView Default.
877             // Update the user agent menu item title.
878             userAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_webview_default));
879
880             // Select the WebView Default radio box.
881             menu.findItem(R.id.user_agent_webview_default).setChecked(true);
882         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[2])) {  // Firefox on Android.
883             // Update the user agent menu item title.
884             userAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_firefox_on_android));
885
886             // Select the Firefox on Android radio box.
887             menu.findItem(R.id.user_agent_firefox_on_android).setChecked(true);
888         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[3])) {  // Chrome on Android.
889             // Update the user agent menu item title.
890             userAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_chrome_on_android));
891
892             // Select the Chrome on Android radio box.
893             menu.findItem(R.id.user_agent_chrome_on_android).setChecked(true);
894         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[4])) {  // Safari on iOS.
895             // Update the user agent menu item title.
896             userAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_safari_on_ios));
897
898             // Select the Safari on iOS radio box.
899             menu.findItem(R.id.user_agent_safari_on_ios).setChecked(true);
900         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[5])) {  // Firefox on Linux.
901             // Update the user agent menu item title.
902             userAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_firefox_on_linux));
903
904             // Select the Firefox on Linux radio box.
905             menu.findItem(R.id.user_agent_firefox_on_linux).setChecked(true);
906         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[6])) {  // Chromium on Linux.
907             // Update the user agent menu item title.
908             userAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_chromium_on_linux));
909
910             // Select the Chromium on Linux radio box.
911             menu.findItem(R.id.user_agent_chromium_on_linux).setChecked(true);
912         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[7])) {  // Firefox on Windows.
913             // Update the user agent menu item title.
914             userAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_firefox_on_windows));
915
916             // Select the Firefox on Windows radio box.
917             menu.findItem(R.id.user_agent_firefox_on_windows).setChecked(true);
918         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[8])) {  // Chrome on Windows.
919             // Update the user agent menu item title.
920             userAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_chrome_on_windows));
921
922             // Select the Chrome on Windows radio box.
923             menu.findItem(R.id.user_agent_chrome_on_windows).setChecked(true);
924         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[9])) {  // Edge on Windows.
925             // Update the user agent menu item title.
926             userAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_edge_on_windows));
927
928             // Select the Edge on Windows radio box.
929             menu.findItem(R.id.user_agent_edge_on_windows).setChecked(true);
930         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[10])) {  // Internet Explorer on Windows.
931             // Update the user agent menu item title.
932             userAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_internet_explorer_on_windows));
933
934             // Select the Internet on Windows radio box.
935             menu.findItem(R.id.user_agent_internet_explorer_on_windows).setChecked(true);
936         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[11])) {  // Safari on macOS.
937             // Update the user agent menu item title.
938             userAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_safari_on_macos));
939
940             // Select the Safari on macOS radio box.
941             menu.findItem(R.id.user_agent_safari_on_macos).setChecked(true);
942         } else {  // Custom user agent.
943             // Update the user agent menu item title.
944             userAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_custom));
945
946             // Select the Custom radio box.
947             menu.findItem(R.id.user_agent_custom).setChecked(true);
948         }
949
950         // Set the font size title.
951         fontSizeMenuItem.setTitle(getString(R.string.font_size) + " - " + fontSize + "%");
952
953         // Run all the other default commands.
954         super.onPrepareOptionsMenu(menu);
955
956         // Display the menu.
957         return true;
958     }
959
960     @Override
961     // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
962     @SuppressLint("SetJavaScriptEnabled")
963     public boolean onOptionsItemSelected(MenuItem menuItem) {
964         // Get the selected menu item ID.
965         int menuItemId = menuItem.getItemId();
966
967         // Get a handle for the shared preferences.
968         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
969
970         // Get a handle for the cookie manager.
971         CookieManager cookieManager = CookieManager.getInstance();
972
973         // Run the commands that correlate to the selected menu item.
974         switch (menuItemId) {
975             case R.id.toggle_javascript:
976                 // Toggle the JavaScript status.
977                 currentWebView.getSettings().setJavaScriptEnabled(!currentWebView.getSettings().getJavaScriptEnabled());
978
979                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
980                 updatePrivacyIcons(true);
981
982                 // Display a `Snackbar`.
983                 if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScrip is enabled.
984                     Snackbar.make(findViewById(R.id.webviewpager), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
985                 } else if (cookieManager.acceptCookie()) {  // JavaScript is disabled, but first-party cookies are enabled.
986                     Snackbar.make(findViewById(R.id.webviewpager), R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
987                 } else {  // Privacy mode.
988                     Snackbar.make(findViewById(R.id.webviewpager), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
989                 }
990
991                 // Reload the current WebView.
992                 currentWebView.reload();
993
994                 // Consume the event.
995                 return true;
996
997             case R.id.refresh:
998                 if (menuItem.getTitle().equals(getString(R.string.refresh))) {  // The refresh button was pushed.
999                     // Reload the current WebView.
1000                     currentWebView.reload();
1001                 } else {  // The stop button was pushed.
1002                     // Stop the loading of the WebView.
1003                     currentWebView.stopLoading();
1004                 }
1005
1006                 // Consume the event.
1007                 return true;
1008
1009             case R.id.bookmarks:
1010                 // Get a handle for the drawer layout.
1011                 DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
1012
1013                 // Open the bookmarks drawer.
1014                 drawerLayout.openDrawer(GravityCompat.END);
1015
1016                 // Consume the event.
1017                 return true;
1018
1019             case R.id.toggle_first_party_cookies:
1020                 // Switch the first-party cookie status.
1021                 cookieManager.setAcceptCookie(!cookieManager.acceptCookie());
1022
1023                 // Store the first-party cookie status.
1024                 currentWebView.setAcceptFirstPartyCookies(cookieManager.acceptCookie());
1025
1026                 // Update the menu checkbox.
1027                 menuItem.setChecked(cookieManager.acceptCookie());
1028
1029                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1030                 updatePrivacyIcons(true);
1031
1032                 // Display a snackbar.
1033                 if (cookieManager.acceptCookie()) {  // First-party cookies are enabled.
1034                     Snackbar.make(findViewById(R.id.webviewpager), R.string.first_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
1035                 } else if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScript is still enabled.
1036                     Snackbar.make(findViewById(R.id.webviewpager), R.string.first_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
1037                 } else {  // Privacy mode.
1038                     Snackbar.make(findViewById(R.id.webviewpager), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
1039                 }
1040
1041                 // Reload the current WebView.
1042                 currentWebView.reload();
1043
1044                 // Consume the event.
1045                 return true;
1046
1047             case R.id.toggle_third_party_cookies:
1048                 if (Build.VERSION.SDK_INT >= 21) {
1049                     // Switch the status of thirdPartyCookiesEnabled.
1050                     cookieManager.setAcceptThirdPartyCookies(currentWebView, !cookieManager.acceptThirdPartyCookies(currentWebView));
1051
1052                     // Update the menu checkbox.
1053                     menuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
1054
1055                     // Display a snackbar.
1056                     if (cookieManager.acceptThirdPartyCookies(currentWebView)) {
1057                         Snackbar.make(findViewById(R.id.webviewpager), R.string.third_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
1058                     } else {
1059                         Snackbar.make(findViewById(R.id.webviewpager), R.string.third_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
1060                     }
1061
1062                     // Reload the current WebView.
1063                     currentWebView.reload();
1064                 } // Else do nothing because SDK < 21.
1065
1066                 // Consume the event.
1067                 return true;
1068
1069             case R.id.toggle_dom_storage:
1070                 // Toggle the status of domStorageEnabled.
1071                 currentWebView.getSettings().setDomStorageEnabled(!currentWebView.getSettings().getDomStorageEnabled());
1072
1073                 // Update the menu checkbox.
1074                 menuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
1075
1076                 // Update the privacy icon.  `true` refreshes the app bar icons.
1077                 updatePrivacyIcons(true);
1078
1079                 // Display a snackbar.
1080                 if (currentWebView.getSettings().getDomStorageEnabled()) {
1081                     Snackbar.make(findViewById(R.id.webviewpager), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
1082                 } else {
1083                     Snackbar.make(findViewById(R.id.webviewpager), R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
1084                 }
1085
1086                 // Reload the current WebView.
1087                 currentWebView.reload();
1088
1089                 // Consume the event.
1090                 return true;
1091
1092             // Form data can be removed once the minimum API >= 26.
1093             case R.id.toggle_save_form_data:
1094                 // Switch the status of saveFormDataEnabled.
1095                 currentWebView.getSettings().setSaveFormData(!currentWebView.getSettings().getSaveFormData());
1096
1097                 // Update the menu checkbox.
1098                 menuItem.setChecked(currentWebView.getSettings().getSaveFormData());
1099
1100                 // Display a snackbar.
1101                 if (currentWebView.getSettings().getSaveFormData()) {
1102                     Snackbar.make(findViewById(R.id.webviewpager), R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
1103                 } else {
1104                     Snackbar.make(findViewById(R.id.webviewpager), R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
1105                 }
1106
1107                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1108                 updatePrivacyIcons(true);
1109
1110                 // Reload the current WebView.
1111                 currentWebView.reload();
1112
1113                 // Consume the event.
1114                 return true;
1115
1116             case R.id.clear_cookies:
1117                 Snackbar.make(findViewById(R.id.webviewpager), R.string.cookies_deleted, Snackbar.LENGTH_LONG)
1118                         .setAction(R.string.undo, v -> {
1119                             // Do nothing because everything will be handled by `onDismissed()` below.
1120                         })
1121                         .addCallback(new Snackbar.Callback() {
1122                             @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
1123                             @Override
1124                             public void onDismissed(Snackbar snackbar, int event) {
1125                                 if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
1126                                     // Delete the cookies, which command varies by SDK.
1127                                     if (Build.VERSION.SDK_INT < 21) {
1128                                         cookieManager.removeAllCookie();
1129                                     } else {
1130                                         cookieManager.removeAllCookies(null);
1131                                     }
1132                                 }
1133                             }
1134                         })
1135                         .show();
1136
1137                 // Consume the event.
1138                 return true;
1139
1140             case R.id.clear_dom_storage:
1141                 Snackbar.make(findViewById(R.id.webviewpager), R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
1142                         .setAction(R.string.undo, v -> {
1143                             // Do nothing because everything will be handled by `onDismissed()` below.
1144                         })
1145                         .addCallback(new Snackbar.Callback() {
1146                             @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
1147                             @Override
1148                             public void onDismissed(Snackbar snackbar, int event) {
1149                                 if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
1150                                     // Delete the DOM Storage.
1151                                     WebStorage webStorage = WebStorage.getInstance();
1152                                     webStorage.deleteAllData();
1153
1154                                     // Initialize a handler to manually delete the DOM storage files and directories.
1155                                     Handler deleteDomStorageHandler = new Handler();
1156
1157                                     // Setup a runnable to manually delete the DOM storage files and directories.
1158                                     Runnable deleteDomStorageRunnable = () -> {
1159                                         try {
1160                                             // Get a handle for the runtime.
1161                                             Runtime runtime = Runtime.getRuntime();
1162
1163                                             // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`,
1164                                             // which links to `/data/data/com.stoutner.privacybrowser.standard`.
1165                                             String privateDataDirectoryString = getApplicationInfo().dataDir;
1166
1167                                             // A string array must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
1168                                             Process deleteLocalStorageProcess = runtime.exec(new String[]{"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
1169
1170                                             // Multiple commands must be used because `Runtime.exec()` does not like `*`.
1171                                             Process deleteIndexProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
1172                                             Process deleteQuotaManagerProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
1173                                             Process deleteQuotaManagerJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
1174                                             Process deleteDatabasesProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
1175
1176                                             // Wait for the processes to finish.
1177                                             deleteLocalStorageProcess.waitFor();
1178                                             deleteIndexProcess.waitFor();
1179                                             deleteQuotaManagerProcess.waitFor();
1180                                             deleteQuotaManagerJournalProcess.waitFor();
1181                                             deleteDatabasesProcess.waitFor();
1182                                         } catch (Exception exception) {
1183                                             // Do nothing if an error is thrown.
1184                                         }
1185                                     };
1186
1187                                     // Manually delete the DOM storage files after 200 milliseconds.
1188                                     deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
1189                                 }
1190                             }
1191                         })
1192                         .show();
1193
1194                 // Consume the event.
1195                 return true;
1196
1197             // Form data can be remove once the minimum API >= 26.
1198             case R.id.clear_form_data:
1199                 Snackbar.make(findViewById(R.id.webviewpager), R.string.form_data_deleted, Snackbar.LENGTH_LONG)
1200                         .setAction(R.string.undo, v -> {
1201                             // Do nothing because everything will be handled by `onDismissed()` below.
1202                         })
1203                         .addCallback(new Snackbar.Callback() {
1204                             @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
1205                             @Override
1206                             public void onDismissed(Snackbar snackbar, int event) {
1207                                 if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
1208                                     // Delete the form data.
1209                                     WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
1210                                     mainWebViewDatabase.clearFormData();
1211                                 }
1212                             }
1213                         })
1214                         .show();
1215
1216                 // Consume the event.
1217                 return true;
1218
1219             case R.id.easylist:
1220                 // Toggle the EasyList status.
1221                 currentWebView.enableBlocklist(NestedScrollWebView.EASYLIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
1222
1223                 // Update the menu checkbox.
1224                 menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
1225
1226                 // Reload the current WebView.
1227                 currentWebView.reload();
1228
1229                 // Consume the event.
1230                 return true;
1231
1232             case R.id.easyprivacy:
1233                 // Toggle the EasyPrivacy status.
1234                 currentWebView.enableBlocklist(NestedScrollWebView.EASYPRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
1235
1236                 // Update the menu checkbox.
1237                 menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
1238
1239                 // Reload the current WebView.
1240                 currentWebView.reload();
1241
1242                 // Consume the event.
1243                 return true;
1244
1245             case R.id.fanboys_annoyance_list:
1246                 // Toggle Fanboy's Annoyance List status.
1247                 currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
1248
1249                 // Update the menu checkbox.
1250                 menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
1251
1252                 // Update the staus of Fanboy's Social Blocking List.
1253                 MenuItem fanboysSocialBlockingListMenuItem = optionsMenu.findItem(R.id.fanboys_social_blocking_list);
1254                 fanboysSocialBlockingListMenuItem.setEnabled(!currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
1255
1256                 // Reload the current WebView.
1257                 currentWebView.reload();
1258
1259                 // Consume the event.
1260                 return true;
1261
1262             case R.id.fanboys_social_blocking_list:
1263                 // Toggle Fanboy's Social Blocking List status.
1264                 currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
1265
1266                 // Update the menu checkbox.
1267                 menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
1268
1269                 // Reload the current WebView.
1270                 currentWebView.reload();
1271
1272                 // Consume the event.
1273                 return true;
1274
1275             case R.id.ultralist:
1276                 // Toggle the UltraList status.
1277                 currentWebView.enableBlocklist(NestedScrollWebView.ULTRALIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
1278
1279                 // Update the menu checkbox.
1280                 menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
1281
1282                 // Reload the current WebView.
1283                 currentWebView.reload();
1284
1285                 // Consume the event.
1286                 return true;
1287
1288             case R.id.ultraprivacy:
1289                 // Toggle the UltraPrivacy status.
1290                 currentWebView.enableBlocklist(NestedScrollWebView.ULTRAPRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
1291
1292                 // Update the menu checkbox.
1293                 menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
1294
1295                 // Reload the current WebView.
1296                 currentWebView.reload();
1297
1298                 // Consume the event.
1299                 return true;
1300
1301             case R.id.block_all_third_party_requests:
1302                 //Toggle the third-party requests blocker status.
1303                 currentWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS, !currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
1304
1305                 // Update the menu checkbox.
1306                 menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
1307
1308                 // Reload the current WebView.
1309                 currentWebView.reload();
1310
1311                 // Consume the event.
1312                 return true;
1313
1314             case R.id.proxy_none:
1315                 // Update the proxy mode.
1316                 proxyMode = ProxyHelper.NONE;
1317
1318                 // Apply the proxy mode.
1319                 applyProxy(true);
1320
1321                 // Consume the event.
1322                 return true;
1323
1324             case R.id.proxy_tor:
1325                 // Update the proxy mode.
1326                 proxyMode = ProxyHelper.TOR;
1327
1328                 // Apply the proxy mode.
1329                 applyProxy(true);
1330
1331                 // Consume the event.
1332                 return true;
1333
1334             case R.id.proxy_i2p:
1335                 // Update the proxy mode.
1336                 proxyMode = ProxyHelper.I2P;
1337
1338                 // Apply the proxy mode.
1339                 applyProxy(true);
1340
1341                 // Consume the event.
1342                 return true;
1343
1344             case R.id.proxy_custom:
1345                 // Update the proxy mode.
1346                 proxyMode = ProxyHelper.CUSTOM;
1347
1348                 // Apply the proxy mode.
1349                 applyProxy(true);
1350
1351                 // Consume the event.
1352                 return true;
1353
1354             case R.id.user_agent_privacy_browser:
1355                 // Update the user agent.
1356                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
1357
1358                 // Reload the current WebView.
1359                 currentWebView.reload();
1360
1361                 // Consume the event.
1362                 return true;
1363
1364             case R.id.user_agent_webview_default:
1365                 // Update the user agent.
1366                 currentWebView.getSettings().setUserAgentString("");
1367
1368                 // Reload the current WebView.
1369                 currentWebView.reload();
1370
1371                 // Consume the event.
1372                 return true;
1373
1374             case R.id.user_agent_firefox_on_android:
1375                 // Update the user agent.
1376                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
1377
1378                 // Reload the current WebView.
1379                 currentWebView.reload();
1380
1381                 // Consume the event.
1382                 return true;
1383
1384             case R.id.user_agent_chrome_on_android:
1385                 // Update the user agent.
1386                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);
1387
1388                 // Reload the current WebView.
1389                 currentWebView.reload();
1390
1391                 // Consume the event.
1392                 return true;
1393
1394             case R.id.user_agent_safari_on_ios:
1395                 // Update the user agent.
1396                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
1397
1398                 // Reload the current WebView.
1399                 currentWebView.reload();
1400
1401                 // Consume the event.
1402                 return true;
1403
1404             case R.id.user_agent_firefox_on_linux:
1405                 // Update the user agent.
1406                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
1407
1408                 // Reload the current WebView.
1409                 currentWebView.reload();
1410
1411                 // Consume the event.
1412                 return true;
1413
1414             case R.id.user_agent_chromium_on_linux:
1415                 // Update the user agent.
1416                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
1417
1418                 // Reload the current WebView.
1419                 currentWebView.reload();
1420
1421                 // Consume the event.
1422                 return true;
1423
1424             case R.id.user_agent_firefox_on_windows:
1425                 // Update the user agent.
1426                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
1427
1428                 // Reload the current WebView.
1429                 currentWebView.reload();
1430
1431                 // Consume the event.
1432                 return true;
1433
1434             case R.id.user_agent_chrome_on_windows:
1435                 // Update the user agent.
1436                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
1437
1438                 // Reload the current WebView.
1439                 currentWebView.reload();
1440
1441                 // Consume the event.
1442                 return true;
1443
1444             case R.id.user_agent_edge_on_windows:
1445                 // Update the user agent.
1446                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
1447
1448                 // Reload the current WebView.
1449                 currentWebView.reload();
1450
1451                 // Consume the event.
1452                 return true;
1453
1454             case R.id.user_agent_internet_explorer_on_windows:
1455                 // Update the user agent.
1456                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
1457
1458                 // Reload the current WebView.
1459                 currentWebView.reload();
1460
1461                 // Consume the event.
1462                 return true;
1463
1464             case R.id.user_agent_safari_on_macos:
1465                 // Update the user agent.
1466                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
1467
1468                 // Reload the current WebView.
1469                 currentWebView.reload();
1470
1471                 // Consume the event.
1472                 return true;
1473
1474             case R.id.user_agent_custom:
1475                 // Update the user agent.
1476                 currentWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
1477
1478                 // Reload the current WebView.
1479                 currentWebView.reload();
1480
1481                 // Consume the event.
1482                 return true;
1483
1484             case R.id.font_size:
1485                 // Instantiate the font size dialog.
1486                 DialogFragment fontSizeDialogFragment = FontSizeDialog.displayDialog(currentWebView.getSettings().getTextZoom());
1487
1488                 // Show the font size dialog.
1489                 fontSizeDialogFragment.show(getSupportFragmentManager(), getString(R.string.font_size));
1490
1491                 // Consume the event.
1492                 return true;
1493
1494             case R.id.swipe_to_refresh:
1495                 // Toggle the stored status of swipe to refresh.
1496                 currentWebView.setSwipeToRefresh(!currentWebView.getSwipeToRefresh());
1497
1498                 // Get a handle for the swipe refresh layout.
1499                 SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
1500
1501                 // Update the swipe refresh layout.
1502                 if (currentWebView.getSwipeToRefresh()) {  // Swipe to refresh is enabled.
1503                     // Only enable the swipe refresh layout if the WebView is scrolled to the top.  It is updated every time the scroll changes.
1504                     swipeRefreshLayout.setEnabled(currentWebView.getY() == 0);
1505                 } else {  // Swipe to refresh is disabled.
1506                     // Disable the swipe refresh layout.
1507                     swipeRefreshLayout.setEnabled(false);
1508                 }
1509
1510                 // Consume the event.
1511                 return true;
1512
1513             case R.id.wide_viewport:
1514                 // Toggle the viewport.
1515                 currentWebView.getSettings().setUseWideViewPort(!currentWebView.getSettings().getUseWideViewPort());
1516
1517                 // Consume the event.
1518                 return true;
1519
1520             case R.id.display_images:
1521                 if (currentWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
1522                     // Disable loading of images.
1523                     currentWebView.getSettings().setLoadsImagesAutomatically(false);
1524
1525                     // Reload the website to remove existing images.
1526                     currentWebView.reload();
1527                 } else {  // Images are not currently loaded automatically.
1528                     // Enable loading of images.  Missing images will be loaded without the need for a reload.
1529                     currentWebView.getSettings().setLoadsImagesAutomatically(true);
1530                 }
1531
1532                 // Consume the event.
1533                 return true;
1534
1535             case R.id.night_mode:
1536                 // Toggle night mode.
1537                 currentWebView.setNightMode(!currentWebView.getNightMode());
1538
1539                 // Enable or disable JavaScript according to night mode, the global preference, and any domain settings.
1540                 if (currentWebView.getNightMode()) {  // Night mode is enabled, which requires JavaScript.
1541                     // Enable JavaScript.
1542                     currentWebView.getSettings().setJavaScriptEnabled(true);
1543                 } else if (currentWebView.getDomainSettingsApplied()) {  // Night mode is disabled and domain settings are applied.  Set JavaScript according to the domain settings.
1544                     // Apply the JavaScript preference that was stored the last time domain settings were loaded.
1545                     currentWebView.getSettings().setJavaScriptEnabled(currentWebView.getDomainSettingsJavaScriptEnabled());
1546                 } else {  // Night mode is disabled and domain settings are not applied.  Set JavaScript according to the global preference.
1547                     // Apply the JavaScript preference.
1548                     currentWebView.getSettings().setJavaScriptEnabled(sharedPreferences.getBoolean("javascript", false));
1549                 }
1550
1551                 // Update the privacy icons.
1552                 updatePrivacyIcons(false);
1553
1554                 // Reload the website.
1555                 currentWebView.reload();
1556
1557                 // Consume the event.
1558                 return true;
1559
1560             case R.id.find_on_page:
1561                 // Get a handle for the views.
1562                 Toolbar toolbar = findViewById(R.id.toolbar);
1563                 LinearLayout findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
1564                 EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
1565
1566                 // Set the minimum height of the find on page linear layout to match the toolbar.
1567                 findOnPageLinearLayout.setMinimumHeight(toolbar.getHeight());
1568
1569                 // Hide the toolbar.
1570                 toolbar.setVisibility(View.GONE);
1571
1572                 // Show the find on page linear layout.
1573                 findOnPageLinearLayout.setVisibility(View.VISIBLE);
1574
1575                 // Display the keyboard.  The app must wait 200 ms before running the command to work around a bug in Android.
1576                 // http://stackoverflow.com/questions/5520085/android-show-softkeyboard-with-showsoftinput-is-not-working
1577                 findOnPageEditText.postDelayed(() -> {
1578                     // Set the focus on `findOnPageEditText`.
1579                     findOnPageEditText.requestFocus();
1580
1581                     // Get a handle for the input method manager.
1582                     InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
1583
1584                     // Remove the lint warning below that the input method manager might be null.
1585                     assert inputMethodManager != null;
1586
1587                     // Display the keyboard.  `0` sets no input flags.
1588                     inputMethodManager.showSoftInput(findOnPageEditText, 0);
1589                 }, 200);
1590
1591                 // Consume the event.
1592                 return true;
1593
1594             case R.id.print:
1595                 // Get a print manager instance.
1596                 PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
1597
1598                 // Remove the lint error below that print manager might be null.
1599                 assert printManager != null;
1600
1601                 // Create a print document adapter from the current WebView.
1602                 PrintDocumentAdapter printDocumentAdapter = currentWebView.createPrintDocumentAdapter();
1603
1604                 // Print the document.
1605                 printManager.print(getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
1606
1607                 // Consume the event.
1608                 return true;
1609
1610             case R.id.save_url:
1611                 // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
1612                 new PrepareSaveDialog(this, this, getSupportFragmentManager(), StoragePermissionDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
1613                         currentWebView.getAcceptFirstPartyCookies()).execute(currentWebView.getCurrentUrl());
1614
1615                 // Consume the event.
1616                 return true;
1617
1618             case R.id.save_as_archive:
1619                 // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
1620                 new PrepareSaveDialog(this, this, getSupportFragmentManager(), StoragePermissionDialog.SAVE_AS_ARCHIVE, currentWebView.getSettings().getUserAgentString(),
1621                         currentWebView.getAcceptFirstPartyCookies()).execute(currentWebView.getCurrentUrl());
1622
1623                 // Consume the event.
1624                 return true;
1625
1626             case R.id.save_as_image:
1627                 // Prepare the save dialog.  The dialog will be displayed once the file size adn the content disposition have been acquired.
1628                 new PrepareSaveDialog(this, this, getSupportFragmentManager(), StoragePermissionDialog.SAVE_AS_IMAGE, currentWebView.getSettings().getUserAgentString(),
1629                         currentWebView.getAcceptFirstPartyCookies()).execute(currentWebView.getCurrentUrl());
1630
1631                 // Consume the event.
1632                 return true;
1633
1634             case R.id.add_to_homescreen:
1635                 // Instantiate the create home screen shortcut dialog.
1636                 DialogFragment createHomeScreenShortcutDialogFragment = CreateHomeScreenShortcutDialog.createDialog(currentWebView.getTitle(), currentWebView.getUrl(),
1637                         currentWebView.getFavoriteOrDefaultIcon());
1638
1639                 // Show the create home screen shortcut dialog.
1640                 createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
1641
1642                 // Consume the event.
1643                 return true;
1644
1645             case R.id.view_source:
1646                 // Create an intent to launch the view source activity.
1647                 Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
1648
1649                 // Add the variables to the intent.
1650                 viewSourceIntent.putExtra("user_agent", currentWebView.getSettings().getUserAgentString());
1651                 viewSourceIntent.putExtra("current_url", currentWebView.getUrl());
1652
1653                 // Make it so.
1654                 startActivity(viewSourceIntent);
1655
1656                 // Consume the event.
1657                 return true;
1658
1659             case R.id.share_url:
1660                 // Setup the share string.
1661                 String shareString = currentWebView.getTitle() + " – " + currentWebView.getUrl();
1662
1663                 // Create the share intent.
1664                 Intent shareIntent = new Intent(Intent.ACTION_SEND);
1665                 shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
1666                 shareIntent.setType("text/plain");
1667
1668                 // Make it so.
1669                 startActivity(Intent.createChooser(shareIntent, getString(R.string.share_url)));
1670
1671                 // Consume the event.
1672                 return true;
1673
1674             case R.id.open_with_app:
1675                 // Open the URL with an outside app.
1676                 openWithApp(currentWebView.getUrl());
1677
1678                 // Consume the event.
1679                 return true;
1680
1681             case R.id.open_with_browser:
1682                 // Open the URL with an outside browser.
1683                 openWithBrowser(currentWebView.getUrl());
1684
1685                 // Consume the event.
1686                 return true;
1687
1688             case R.id.add_or_edit_domain:
1689                 if (currentWebView.getDomainSettingsApplied()) {  // Edit the current domain settings.
1690                     // Reapply the domain settings on returning to `MainWebViewActivity`.
1691                     reapplyDomainSettingsOnRestart = true;
1692
1693                     // Create an intent to launch the domains activity.
1694                     Intent domainsIntent = new Intent(this, DomainsActivity.class);
1695
1696                     // Add the extra information to the intent.
1697                     domainsIntent.putExtra("load_domain", currentWebView.getDomainSettingsDatabaseId());
1698                     domainsIntent.putExtra("close_on_back", true);
1699                     domainsIntent.putExtra("current_url", currentWebView.getUrl());
1700
1701                     // Get the current certificate.
1702                     SslCertificate sslCertificate = currentWebView.getCertificate();
1703
1704                     // Check to see if the SSL certificate is populated.
1705                     if (sslCertificate != null) {
1706                         // Extract the certificate to strings.
1707                         String issuedToCName = sslCertificate.getIssuedTo().getCName();
1708                         String issuedToOName = sslCertificate.getIssuedTo().getOName();
1709                         String issuedToUName = sslCertificate.getIssuedTo().getUName();
1710                         String issuedByCName = sslCertificate.getIssuedBy().getCName();
1711                         String issuedByOName = sslCertificate.getIssuedBy().getOName();
1712                         String issuedByUName = sslCertificate.getIssuedBy().getUName();
1713                         long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
1714                         long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
1715
1716                         // Add the certificate to the intent.
1717                         domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
1718                         domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
1719                         domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
1720                         domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
1721                         domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
1722                         domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
1723                         domainsIntent.putExtra("ssl_start_date", startDateLong);
1724                         domainsIntent.putExtra("ssl_end_date", endDateLong);
1725                     }
1726
1727                     // Check to see if the current IP addresses have been received.
1728                     if (currentWebView.hasCurrentIpAddresses()) {
1729                         // Add the current IP addresses to the intent.
1730                         domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
1731                     }
1732
1733                     // Make it so.
1734                     startActivity(domainsIntent);
1735                 } else {  // Add a new domain.
1736                     // Apply the new domain settings on returning to `MainWebViewActivity`.
1737                     reapplyDomainSettingsOnRestart = true;
1738
1739                     // Get the current domain
1740                     Uri currentUri = Uri.parse(currentWebView.getUrl());
1741                     String currentDomain = currentUri.getHost();
1742
1743                     // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
1744                     DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
1745
1746                     // Create the domain and store the database ID.
1747                     int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
1748
1749                     // Create an intent to launch the domains activity.
1750                     Intent domainsIntent = new Intent(this, DomainsActivity.class);
1751
1752                     // Add the extra information to the intent.
1753                     domainsIntent.putExtra("load_domain", newDomainDatabaseId);
1754                     domainsIntent.putExtra("close_on_back", true);
1755                     domainsIntent.putExtra("current_url", currentWebView.getUrl());
1756
1757                     // Get the current certificate.
1758                     SslCertificate sslCertificate = currentWebView.getCertificate();
1759
1760                     // Check to see if the SSL certificate is populated.
1761                     if (sslCertificate != null) {
1762                         // Extract the certificate to strings.
1763                         String issuedToCName = sslCertificate.getIssuedTo().getCName();
1764                         String issuedToOName = sslCertificate.getIssuedTo().getOName();
1765                         String issuedToUName = sslCertificate.getIssuedTo().getUName();
1766                         String issuedByCName = sslCertificate.getIssuedBy().getCName();
1767                         String issuedByOName = sslCertificate.getIssuedBy().getOName();
1768                         String issuedByUName = sslCertificate.getIssuedBy().getUName();
1769                         long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
1770                         long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
1771
1772                         // Add the certificate to the intent.
1773                         domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
1774                         domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
1775                         domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
1776                         domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
1777                         domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
1778                         domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
1779                         domainsIntent.putExtra("ssl_start_date", startDateLong);
1780                         domainsIntent.putExtra("ssl_end_date", endDateLong);
1781                     }
1782
1783                     // Check to see if the current IP addresses have been received.
1784                     if (currentWebView.hasCurrentIpAddresses()) {
1785                         // Add the current IP addresses to the intent.
1786                         domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
1787                     }
1788
1789                     // Make it so.
1790                     startActivity(domainsIntent);
1791                 }
1792
1793                 // Consume the event.
1794                 return true;
1795
1796             case R.id.ad_consent:
1797                 // Instantiate the ad consent dialog.
1798                 DialogFragment adConsentDialogFragment = new AdConsentDialog();
1799
1800                 // Display the ad consent dialog.
1801                 adConsentDialogFragment.show(getSupportFragmentManager(), getString(R.string.ad_consent));
1802
1803                 // Consume the event.
1804                 return true;
1805
1806             default:
1807                 // Don't consume the event.
1808                 return super.onOptionsItemSelected(menuItem);
1809         }
1810     }
1811
1812     // removeAllCookies is deprecated, but it is required for API < 21.
1813     @Override
1814     public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
1815         // Get the menu item ID.
1816         int menuItemId = menuItem.getItemId();
1817
1818         // Get a handle for the shared preferences.
1819         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
1820
1821         // Run the commands that correspond to the selected menu item.
1822         switch (menuItemId) {
1823             case R.id.clear_and_exit:
1824                 // Clear and exit Privacy Browser.
1825                 clearAndExit();
1826                 break;
1827
1828             case R.id.home:
1829                 // Load the homepage.
1830                 loadUrl(currentWebView, sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
1831                 break;
1832
1833             case R.id.back:
1834                 if (currentWebView.canGoBack()) {
1835                     // Get the current web back forward list.
1836                     WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
1837
1838                     // Get the previous entry URL.
1839                     String previousUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() - 1).getUrl();
1840
1841                     // Apply the domain settings.
1842                     applyDomainSettings(currentWebView, previousUrl, false, false);
1843
1844                     // Load the previous website in the history.
1845                     currentWebView.goBack();
1846                 }
1847                 break;
1848
1849             case R.id.forward:
1850                 if (currentWebView.canGoForward()) {
1851                     // Get the current web back forward list.
1852                     WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
1853
1854                     // Get the next entry URL.
1855                     String nextUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() + 1).getUrl();
1856
1857                     // Apply the domain settings.
1858                     applyDomainSettings(currentWebView, nextUrl, false, false);
1859
1860                     // Load the next website in the history.
1861                     currentWebView.goForward();
1862                 }
1863                 break;
1864
1865             case R.id.history:
1866                 // Instantiate the URL history dialog.
1867                 DialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(currentWebView.getWebViewFragmentId());
1868
1869                 // Show the URL history dialog.
1870                 urlHistoryDialogFragment.show(getSupportFragmentManager(), getString(R.string.history));
1871                 break;
1872
1873             case R.id.open:
1874                 // Instantiate the open file dialog.
1875                 DialogFragment openDialogFragment = new OpenDialog();
1876
1877                 // Show the open file dialog.
1878                 openDialogFragment.show(getSupportFragmentManager(), getString(R.string.open));
1879                 break;
1880
1881             case R.id.requests:
1882                 // Populate the resource requests.
1883                 RequestsActivity.resourceRequests = currentWebView.getResourceRequests();
1884
1885                 // Create an intent to launch the Requests activity.
1886                 Intent requestsIntent = new Intent(this, RequestsActivity.class);
1887
1888                 // Add the block third-party requests status to the intent.
1889                 requestsIntent.putExtra("block_all_third_party_requests", currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
1890
1891                 // Make it so.
1892                 startActivity(requestsIntent);
1893                 break;
1894
1895             case R.id.downloads:
1896                 // Launch the system Download Manager.
1897                 Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
1898
1899                 // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
1900                 downloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1901
1902                 // Make it so.
1903                 startActivity(downloadManagerIntent);
1904                 break;
1905
1906             case R.id.domains:
1907                 // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
1908                 reapplyDomainSettingsOnRestart = true;
1909
1910                 // Launch the domains activity.
1911                 Intent domainsIntent = new Intent(this, DomainsActivity.class);
1912
1913                 // Add the extra information to the intent.
1914                 domainsIntent.putExtra("current_url", currentWebView.getUrl());
1915
1916                 // Get the current certificate.
1917                 SslCertificate sslCertificate = currentWebView.getCertificate();
1918
1919                 // Check to see if the SSL certificate is populated.
1920                 if (sslCertificate != null) {
1921                     // Extract the certificate to strings.
1922                     String issuedToCName = sslCertificate.getIssuedTo().getCName();
1923                     String issuedToOName = sslCertificate.getIssuedTo().getOName();
1924                     String issuedToUName = sslCertificate.getIssuedTo().getUName();
1925                     String issuedByCName = sslCertificate.getIssuedBy().getCName();
1926                     String issuedByOName = sslCertificate.getIssuedBy().getOName();
1927                     String issuedByUName = sslCertificate.getIssuedBy().getUName();
1928                     long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
1929                     long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
1930
1931                     // Add the certificate to the intent.
1932                     domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
1933                     domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
1934                     domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
1935                     domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
1936                     domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
1937                     domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
1938                     domainsIntent.putExtra("ssl_start_date", startDateLong);
1939                     domainsIntent.putExtra("ssl_end_date", endDateLong);
1940                 }
1941
1942                 // Check to see if the current IP addresses have been received.
1943                 if (currentWebView.hasCurrentIpAddresses()) {
1944                     // Add the current IP addresses to the intent.
1945                     domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
1946                 }
1947
1948                 // Make it so.
1949                 startActivity(domainsIntent);
1950                 break;
1951
1952             case R.id.settings:
1953                 // Set the flag to reapply app settings on restart when returning from Settings.
1954                 reapplyAppSettingsOnRestart = true;
1955
1956                 // Set the flag to reapply the domain settings on restart when returning from Settings.
1957                 reapplyDomainSettingsOnRestart = true;
1958
1959                 // Launch the settings activity.
1960                 Intent settingsIntent = new Intent(this, SettingsActivity.class);
1961                 startActivity(settingsIntent);
1962                 break;
1963
1964             case R.id.import_export:
1965                 // Launch the import/export activity.
1966                 Intent importExportIntent = new Intent (this, ImportExportActivity.class);
1967                 startActivity(importExportIntent);
1968                 break;
1969
1970             case R.id.logcat:
1971                 // Launch the logcat activity.
1972                 Intent logcatIntent = new Intent(this, LogcatActivity.class);
1973                 startActivity(logcatIntent);
1974                 break;
1975
1976             case R.id.guide:
1977                 // Launch `GuideActivity`.
1978                 Intent guideIntent = new Intent(this, GuideActivity.class);
1979                 startActivity(guideIntent);
1980                 break;
1981
1982             case R.id.about:
1983                 // Create an intent to launch the about activity.
1984                 Intent aboutIntent = new Intent(this, AboutActivity.class);
1985
1986                 // Create a string array for the blocklist versions.
1987                 String[] blocklistVersions = new String[] {easyList.get(0).get(0)[0], easyPrivacy.get(0).get(0)[0], fanboysAnnoyanceList.get(0).get(0)[0], fanboysSocialList.get(0).get(0)[0],
1988                         ultraList.get(0).get(0)[0], ultraPrivacy.get(0).get(0)[0]};
1989
1990                 // Add the blocklist versions to the intent.
1991                 aboutIntent.putExtra("blocklist_versions", blocklistVersions);
1992
1993                 // Make it so.
1994                 startActivity(aboutIntent);
1995                 break;
1996         }
1997
1998         // Get a handle for the drawer layout.
1999         DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
2000
2001         // Close the navigation drawer.
2002         drawerLayout.closeDrawer(GravityCompat.START);
2003         return true;
2004     }
2005
2006     @Override
2007     public void onPostCreate(Bundle savedInstanceState) {
2008         // Run the default commands.
2009         super.onPostCreate(savedInstanceState);
2010
2011         // Sync the state of the DrawerToggle after the default `onRestoreInstanceState()` has finished.  This creates the navigation drawer icon.
2012         actionBarDrawerToggle.syncState();
2013     }
2014
2015     @Override
2016     public void onConfigurationChanged(@NonNull Configuration newConfig) {
2017         // Run the default commands.
2018         super.onConfigurationChanged(newConfig);
2019
2020         // Get the status bar pixel size.
2021         int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
2022         int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
2023
2024         // Get the resource density.
2025         float screenDensity = getResources().getDisplayMetrics().density;
2026
2027         // Recalculate the drawer header padding.
2028         drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
2029         drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
2030         drawerHeaderPaddingBottom = (int) (8 * screenDensity);
2031
2032         // Reload the ad for the free flavor if not in full screen mode.
2033         if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
2034             // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
2035             AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
2036         }
2037
2038         // `invalidateOptionsMenu` should recalculate the number of action buttons from the menu to display on the app bar, but it doesn't because of the this bug:
2039         // https://code.google.com/p/android/issues/detail?id=20493#c8
2040         // ActivityCompat.invalidateOptionsMenu(this);
2041     }
2042
2043     @Override
2044     public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
2045         // Store the hit test result.
2046         final WebView.HitTestResult hitTestResult = currentWebView.getHitTestResult();
2047
2048         // Define the URL strings.
2049         final String imageUrl;
2050         final String linkUrl;
2051
2052         // Get handles for the system managers.
2053         final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
2054
2055         // Remove the lint errors below that the clipboard manager might be null.
2056         assert clipboardManager != null;
2057
2058         // Process the link according to the type.
2059         switch (hitTestResult.getType()) {
2060             // `SRC_ANCHOR_TYPE` is a link.
2061             case WebView.HitTestResult.SRC_ANCHOR_TYPE:
2062                 // Get the target URL.
2063                 linkUrl = hitTestResult.getExtra();
2064
2065                 // Set the target URL as the title of the `ContextMenu`.
2066                 menu.setHeaderTitle(linkUrl);
2067
2068                 // Add an Open in New Tab entry.
2069                 menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2070                     // Load the link URL in a new tab and move to it.
2071                     addNewTab(linkUrl, true);
2072
2073                     // Consume the event.
2074                     return true;
2075                 });
2076
2077                 // Add an Open in Background entry.
2078                 menu.add(R.string.open_in_background).setOnMenuItemClickListener((MenuItem item) -> {
2079                     // Load the link URL in a new tab but do not move to it.
2080                     addNewTab(linkUrl, false);
2081
2082                     // Consume the event.
2083                     return true;
2084                 });
2085
2086                 // Add an Open with App entry.
2087                 menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
2088                     openWithApp(linkUrl);
2089
2090                     // Consume the event.
2091                     return true;
2092                 });
2093
2094                 // Add an Open with Browser entry.
2095                 menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
2096                     openWithBrowser(linkUrl);
2097
2098                     // Consume the event.
2099                     return true;
2100                 });
2101
2102                 // Add a Copy URL entry.
2103                 menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
2104                     // Save the link URL in a `ClipData`.
2105                     ClipData srcAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), linkUrl);
2106
2107                     // Set the `ClipData` as the clipboard's primary clip.
2108                     clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
2109
2110                     // Consume the event.
2111                     return true;
2112                 });
2113
2114                 // Add a Save URL entry.
2115                 menu.add(R.string.save_url).setOnMenuItemClickListener((MenuItem item) -> {
2116                     // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
2117                     new PrepareSaveDialog(this, this, getSupportFragmentManager(), StoragePermissionDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
2118                             currentWebView.getAcceptFirstPartyCookies()).execute(linkUrl);
2119
2120                     // Consume the event.
2121                     return true;
2122                 });
2123
2124                 // Add an empty Cancel entry, which by default closes the context menu.
2125                 menu.add(R.string.cancel);
2126                 break;
2127
2128             // `IMAGE_TYPE` is an image.
2129             case WebView.HitTestResult.IMAGE_TYPE:
2130                 // Get the image URL.
2131                 imageUrl = hitTestResult.getExtra();
2132
2133                 // Set the image URL as the title of the context menu.
2134                 menu.setHeaderTitle(imageUrl);
2135
2136                 // Add an Open in New Tab entry.
2137                 menu.add(R.string.open_image_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2138                     // Load the image in a new tab.
2139                     addNewTab(imageUrl, true);
2140
2141                     // Consume the event.
2142                     return true;
2143                 });
2144
2145                 // Add an Open with App entry.
2146                 menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
2147                     // Open the image URL with an external app.
2148                     openWithApp(imageUrl);
2149
2150                     // Consume the event.
2151                     return true;
2152                 });
2153
2154                 // Add an Open with Browser entry.
2155                 menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
2156                     // Open the image URL with an external browser.
2157                     openWithBrowser(imageUrl);
2158
2159                     // Consume the event.
2160                     return true;
2161                 });
2162
2163                 // Add a View Image entry.
2164                 menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
2165                     // Load the image in the current tab.
2166                     loadUrl(currentWebView, imageUrl);
2167
2168                     // Consume the event.
2169                     return true;
2170                 });
2171
2172                 // Add a Save Image entry.
2173                 menu.add(R.string.save_image).setOnMenuItemClickListener((MenuItem item) -> {
2174                    // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
2175                     new PrepareSaveDialog(this, this, getSupportFragmentManager(), StoragePermissionDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
2176                             currentWebView.getAcceptFirstPartyCookies()).execute(imageUrl);
2177
2178                     // Consume the event.
2179                     return true;
2180                 });
2181
2182                 // Add a Copy URL entry.
2183                 menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
2184                     // Save the image URL in a clip data.
2185                     ClipData imageTypeClipData = ClipData.newPlainText(getString(R.string.url), imageUrl);
2186
2187                     // Set the clip data as the clipboard's primary clip.
2188                     clipboardManager.setPrimaryClip(imageTypeClipData);
2189
2190                     // Consume the event.
2191                     return true;
2192                 });
2193
2194                 // Add an empty Cancel entry, which by default closes the context menu.
2195                 menu.add(R.string.cancel);
2196                 break;
2197
2198             // `SRC_IMAGE_ANCHOR_TYPE` is an image that is also a link.
2199             case WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE:
2200                 // Get the image URL.
2201                 imageUrl = hitTestResult.getExtra();
2202
2203                 // Instantiate a handler.
2204                 Handler handler = new Handler();
2205
2206                 // Get a message from the handler.
2207                 Message message = handler.obtainMessage();
2208
2209                 // Request the image details from the last touched node be returned in the message.
2210                 currentWebView.requestFocusNodeHref(message);
2211
2212                 // Get the link URL from the message data.
2213                 linkUrl = message.getData().getString("url");
2214
2215                 // Set the link URL as the title of the context menu.
2216                 menu.setHeaderTitle(linkUrl);
2217
2218                 // Add an Open in New Tab entry.
2219                 menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2220                     // Load the link URL in a new tab and move to it.
2221                     addNewTab(linkUrl, true);
2222
2223                     // Consume the event.
2224                     return true;
2225                 });
2226
2227                 // Add an Open in Background entry.
2228                 menu.add(R.string.open_in_background).setOnMenuItemClickListener((MenuItem item) -> {
2229                     // Lod the link URL in a new tab but do not move to it.
2230                     addNewTab(linkUrl, false);
2231
2232                     // Consume the event.
2233                     return true;
2234                 });
2235
2236                 // Add an Open Image in New Tab entry.
2237                 menu.add(R.string.open_image_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2238                     // Load the image in a new tab and move to it.
2239                     addNewTab(imageUrl, true);
2240
2241                     // Consume the event.
2242                     return true;
2243                 });
2244
2245                 // Add an Open with App entry.
2246                 menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
2247                     // Open the link URL with an external app.
2248                     openWithApp(linkUrl);
2249
2250                     // Consume the event.
2251                     return true;
2252                 });
2253
2254                 // Add an Open with Browser entry.
2255                 menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
2256                     // Open the link URL with an external browser.
2257                     openWithBrowser(linkUrl);
2258
2259                     // Consume the event.
2260                     return true;
2261                 });
2262
2263                 // Add a View Image entry.
2264                 menu.add(R.string.view_image).setOnMenuItemClickListener((MenuItem item) -> {
2265                    // View the image in the current tab.
2266                    loadUrl(currentWebView, imageUrl);
2267
2268                    // Consume the event.
2269                    return true;
2270                 });
2271
2272                 // Add a Save Image entry.
2273                 menu.add(R.string.save_image).setOnMenuItemClickListener((MenuItem item) -> {
2274                     // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
2275                     new PrepareSaveDialog(this, this, getSupportFragmentManager(), StoragePermissionDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
2276                             currentWebView.getAcceptFirstPartyCookies()).execute(imageUrl);
2277
2278                     // Consume the event.
2279                     return true;
2280                 });
2281
2282                 // Add a Copy URL entry.
2283                 menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
2284                     // Save the link URL in a clip data.
2285                     ClipData srcImageAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), linkUrl);
2286
2287                     // Set the clip data as the clipboard's primary clip.
2288                     clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
2289
2290                     // Consume the event.
2291                     return true;
2292                 });
2293
2294                 // Add a Save URL entry.
2295                 menu.add(R.string.save_url).setOnMenuItemClickListener((MenuItem item) -> {
2296                     // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
2297                     new PrepareSaveDialog(this, this, getSupportFragmentManager(), StoragePermissionDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
2298                             currentWebView.getAcceptFirstPartyCookies()).execute(linkUrl);
2299
2300                     // Consume the event.
2301                     return true;
2302                 });
2303
2304                 // Add an empty Cancel entry, which by default closes the context menu.
2305                 menu.add(R.string.cancel);
2306                 break;
2307
2308             case WebView.HitTestResult.EMAIL_TYPE:
2309                 // Get the target URL.
2310                 linkUrl = hitTestResult.getExtra();
2311
2312                 // Set the target URL as the title of the `ContextMenu`.
2313                 menu.setHeaderTitle(linkUrl);
2314
2315                 // Add a Write Email entry.
2316                 menu.add(R.string.write_email).setOnMenuItemClickListener(item -> {
2317                     // Use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
2318                     Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
2319
2320                     // Parse the url and set it as the data for the `Intent`.
2321                     emailIntent.setData(Uri.parse("mailto:" + linkUrl));
2322
2323                     // `FLAG_ACTIVITY_NEW_TASK` opens the email program in a new task instead as part of Privacy Browser.
2324                     emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
2325
2326                     // Make it so.
2327                     startActivity(emailIntent);
2328
2329                     // Consume the event.
2330                     return true;
2331                 });
2332
2333                 // Add a Copy Email Address entry.
2334                 menu.add(R.string.copy_email_address).setOnMenuItemClickListener(item -> {
2335                     // Save the email address in a `ClipData`.
2336                     ClipData srcEmailTypeClipData = ClipData.newPlainText(getString(R.string.email_address), linkUrl);
2337
2338                     // Set the `ClipData` as the clipboard's primary clip.
2339                     clipboardManager.setPrimaryClip(srcEmailTypeClipData);
2340
2341                     // Consume the event.
2342                     return true;
2343                 });
2344
2345                 // Add an empty Cancel entry, which by default closes the context menu.
2346                 menu.add(R.string.cancel);
2347                 break;
2348         }
2349     }
2350
2351     @Override
2352     public void onCreateBookmark(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
2353         // Get a handle for the bookmarks list view.
2354         ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
2355
2356         // Get the dialog.
2357         Dialog dialog = dialogFragment.getDialog();
2358
2359         // Remove the incorrect lint warning below that the dialog might be null.
2360         assert dialog != null;
2361
2362         // Get the views from the dialog fragment.
2363         EditText createBookmarkNameEditText = dialog.findViewById(R.id.create_bookmark_name_edittext);
2364         EditText createBookmarkUrlEditText = dialog.findViewById(R.id.create_bookmark_url_edittext);
2365
2366         // Extract the strings from the edit texts.
2367         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
2368         String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
2369
2370         // Create a favorite icon byte array output stream.
2371         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
2372
2373         // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2374         favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
2375
2376         // Convert the favorite icon byte array stream to a byte array.
2377         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
2378
2379         // Display the new bookmark below the current items in the (0 indexed) list.
2380         int newBookmarkDisplayOrder = bookmarksListView.getCount();
2381
2382         // Create the bookmark.
2383         bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
2384
2385         // Update the bookmarks cursor with the current contents of this folder.
2386         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
2387
2388         // Update the list view.
2389         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
2390
2391         // Scroll to the new bookmark.
2392         bookmarksListView.setSelection(newBookmarkDisplayOrder);
2393     }
2394
2395     @Override
2396     public void onCreateBookmarkFolder(DialogFragment dialogFragment, @NonNull Bitmap favoriteIconBitmap) {
2397         // Get a handle for the bookmarks list view.
2398         ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
2399
2400         // Get the dialog.
2401         Dialog dialog = dialogFragment.getDialog();
2402
2403         // Remove the incorrect lint warning below that the dialog might be null.
2404         assert dialog != null;
2405
2406         // Get handles for the views in the dialog fragment.
2407         EditText createFolderNameEditText = dialog.findViewById(R.id.create_folder_name_edittext);
2408         RadioButton defaultFolderIconRadioButton = dialog.findViewById(R.id.create_folder_default_icon_radiobutton);
2409         ImageView folderIconImageView = dialog.findViewById(R.id.create_folder_default_icon);
2410
2411         // Get new folder name string.
2412         String folderNameString = createFolderNameEditText.getText().toString();
2413
2414         // Create a folder icon bitmap.
2415         Bitmap folderIconBitmap;
2416
2417         // Set the folder icon bitmap according to the dialog.
2418         if (defaultFolderIconRadioButton.isChecked()) {  // Use the default folder icon.
2419             // Get the default folder icon drawable.
2420             Drawable folderIconDrawable = folderIconImageView.getDrawable();
2421
2422             // Convert the folder icon drawable to a bitmap drawable.
2423             BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
2424
2425             // Convert the folder icon bitmap drawable to a bitmap.
2426             folderIconBitmap = folderIconBitmapDrawable.getBitmap();
2427         } else {  // Use the WebView favorite icon.
2428             // Copy the favorite icon bitmap to the folder icon bitmap.
2429             folderIconBitmap = favoriteIconBitmap;
2430         }
2431
2432         // Create a folder icon byte array output stream.
2433         ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
2434
2435         // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2436         folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
2437
2438         // Convert the folder icon byte array stream to a byte array.
2439         byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
2440
2441         // Move all the bookmarks down one in the display order.
2442         for (int i = 0; i < bookmarksListView.getCount(); i++) {
2443             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
2444             bookmarksDatabaseHelper.updateDisplayOrder(databaseId, i + 1);
2445         }
2446
2447         // Create the folder, which will be placed at the top of the `ListView`.
2448         bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
2449
2450         // Update the bookmarks cursor with the current contents of this folder.
2451         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
2452
2453         // Update the `ListView`.
2454         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
2455
2456         // Scroll to the new folder.
2457         bookmarksListView.setSelection(0);
2458     }
2459
2460     @Override
2461     public void onSaveBookmark(DialogFragment dialogFragment, int selectedBookmarkDatabaseId, Bitmap favoriteIconBitmap) {
2462         // Get the dialog.
2463         Dialog dialog = dialogFragment.getDialog();
2464
2465         // Remove the incorrect lint warning below that the dialog might be null.
2466         assert dialog != null;
2467
2468         // Get handles for the views from the dialog.
2469         EditText editBookmarkNameEditText = dialog.findViewById(R.id.edit_bookmark_name_edittext);
2470         EditText editBookmarkUrlEditText = dialog.findViewById(R.id.edit_bookmark_url_edittext);
2471         RadioButton currentBookmarkIconRadioButton = dialog.findViewById(R.id.edit_bookmark_current_icon_radiobutton);
2472
2473         // Store the bookmark strings.
2474         String bookmarkNameString = editBookmarkNameEditText.getText().toString();
2475         String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
2476
2477         // Update the bookmark.
2478         if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
2479             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
2480         } else {  // Update the bookmark using the `WebView` favorite icon.
2481             // Create a favorite icon byte array output stream.
2482             ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
2483
2484             // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2485             favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
2486
2487             // Convert the favorite icon byte array stream to a byte array.
2488             byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
2489
2490             //  Update the bookmark and the favorite icon.
2491             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
2492         }
2493
2494         // Update the bookmarks cursor with the current contents of this folder.
2495         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
2496
2497         // Update the list view.
2498         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
2499     }
2500
2501     @Override
2502     public void onSaveBookmarkFolder(DialogFragment dialogFragment, int selectedFolderDatabaseId, Bitmap favoriteIconBitmap) {
2503         // Get the dialog.
2504         Dialog dialog = dialogFragment.getDialog();
2505
2506         // Remove the incorrect lint warning below that the dialog might be null.
2507         assert dialog != null;
2508
2509         // Get handles for the views from `dialogFragment`.
2510         EditText editFolderNameEditText = dialog.findViewById(R.id.edit_folder_name_edittext);
2511         RadioButton currentFolderIconRadioButton = dialog.findViewById(R.id.edit_folder_current_icon_radiobutton);
2512         RadioButton defaultFolderIconRadioButton = dialog.findViewById(R.id.edit_folder_default_icon_radiobutton);
2513         ImageView defaultFolderIconImageView = dialog.findViewById(R.id.edit_folder_default_icon_imageview);
2514
2515         // Get the new folder name.
2516         String newFolderNameString = editFolderNameEditText.getText().toString();
2517
2518         // Check if the favorite icon has changed.
2519         if (currentFolderIconRadioButton.isChecked()) {  // Only the name has changed.
2520             // Update the name in the database.
2521             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
2522         } else if (!currentFolderIconRadioButton.isChecked() && newFolderNameString.equals(oldFolderNameString)) {  // Only the icon has changed.
2523             // Create the new folder icon Bitmap.
2524             Bitmap folderIconBitmap;
2525
2526             // Populate the new folder icon bitmap.
2527             if (defaultFolderIconRadioButton.isChecked()) {
2528                 // Get the default folder icon drawable.
2529                 Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
2530
2531                 // Convert the folder icon drawable to a bitmap drawable.
2532                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
2533
2534                 // Convert the folder icon bitmap drawable to a bitmap.
2535                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
2536             } else {  // Use the `WebView` favorite icon.
2537                 // Copy the favorite icon bitmap to the folder icon bitmap.
2538                 folderIconBitmap = favoriteIconBitmap;
2539             }
2540
2541             // Create a folder icon byte array output stream.
2542             ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
2543
2544             // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2545             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
2546
2547             // Convert the folder icon byte array stream to a byte array.
2548             byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
2549
2550             // Update the folder icon in the database.
2551             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, newFolderIconByteArray);
2552         } else {  // The folder icon and the name have changed.
2553             // Get the new folder icon `Bitmap`.
2554             Bitmap folderIconBitmap;
2555             if (defaultFolderIconRadioButton.isChecked()) {
2556                 // Get the default folder icon drawable.
2557                 Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
2558
2559                 // Convert the folder icon drawable to a bitmap drawable.
2560                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
2561
2562                 // Convert the folder icon bitmap drawable to a bitmap.
2563                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
2564             } else {  // Use the `WebView` favorite icon.
2565                 // Copy the favorite icon bitmap to the folder icon bitmap.
2566                 folderIconBitmap = favoriteIconBitmap;
2567             }
2568
2569             // Create a folder icon byte array output stream.
2570             ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
2571
2572             // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2573             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
2574
2575             // Convert the folder icon byte array stream to a byte array.
2576             byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
2577
2578             // Update the folder name and icon in the database.
2579             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, newFolderIconByteArray);
2580         }
2581
2582         // Update the bookmarks cursor with the current contents of this folder.
2583         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
2584
2585         // Update the `ListView`.
2586         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
2587     }
2588
2589     // Override `onBackPressed` to handle the navigation drawer and and the WebViews.
2590     @Override
2591     public void onBackPressed() {
2592         // Get a handle for the drawer layout and the tab layout.
2593         DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
2594         TabLayout tabLayout = findViewById(R.id.tablayout);
2595
2596         if (drawerLayout.isDrawerVisible(GravityCompat.START)) {  // The navigation drawer is open.
2597             // Close the navigation drawer.
2598             drawerLayout.closeDrawer(GravityCompat.START);
2599         } else if (drawerLayout.isDrawerVisible(GravityCompat.END)){  // The bookmarks drawer is open.
2600             if (currentBookmarksFolder.isEmpty()) {  // The home folder is displayed.
2601                 // close the bookmarks drawer.
2602                 drawerLayout.closeDrawer(GravityCompat.END);
2603             } else {  // A subfolder is displayed.
2604                 // Place the former parent folder in `currentFolder`.
2605                 currentBookmarksFolder = bookmarksDatabaseHelper.getParentFolderName(currentBookmarksFolder);
2606
2607                 // Load the new folder.
2608                 loadBookmarksFolder();
2609             }
2610         } else if (displayingFullScreenVideo) {  // A full screen video is shown.
2611             // Get a handle for the layouts.
2612             FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
2613             RelativeLayout mainContentRelativeLayout = findViewById(R.id.main_content_relativelayout);
2614             FrameLayout fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
2615
2616             // Re-enable the screen timeout.
2617             fullScreenVideoFrameLayout.setKeepScreenOn(false);
2618
2619             // Unset the full screen video flag.
2620             displayingFullScreenVideo = false;
2621
2622             // Remove all the views from the full screen video frame layout.
2623             fullScreenVideoFrameLayout.removeAllViews();
2624
2625             // Hide the full screen video frame layout.
2626             fullScreenVideoFrameLayout.setVisibility(View.GONE);
2627
2628             // Enable the sliding drawers.
2629             drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
2630
2631             // Show the main content relative layout.
2632             mainContentRelativeLayout.setVisibility(View.VISIBLE);
2633
2634             // Apply the appropriate full screen mode flags.
2635             if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {  // Privacy Browser is currently in full screen browsing mode.
2636                 // Hide the app bar if specified.
2637                 if (hideAppBar) {
2638                     // Get handles for the views.
2639                     LinearLayout tabsLinearLayout = findViewById(R.id.tabs_linearlayout);
2640                     ActionBar actionBar = getSupportActionBar();
2641
2642                     // Remove the incorrect lint warning below that the action bar might be null.
2643                     assert actionBar != null;
2644
2645                     // Hide the tab linear layout.
2646                     tabsLinearLayout.setVisibility(View.GONE);
2647
2648                     // Hide the action bar.
2649                     actionBar.hide();
2650                 }
2651
2652                 // Hide the banner ad in the free flavor.
2653                 if (BuildConfig.FLAVOR.contentEquals("free")) {
2654                     AdHelper.hideAd(findViewById(R.id.adview));
2655                 }
2656
2657                 // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
2658                 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
2659
2660                 /* Hide the system bars.