Fix a crash in View Source when using a proxy. https://redmine.stoutner.com/issues/725
[PrivacyBrowser.git] / app / src / main / java / com / stoutner / privacybrowser / activities / MainWebViewActivity.java
1 /*
2  * Copyright © 2015-2021 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.annotation.SuppressLint;
25 import android.app.Activity;
26 import android.app.Dialog;
27 import android.app.DownloadManager;
28 import android.app.SearchManager;
29 import android.content.ActivityNotFoundException;
30 import android.content.BroadcastReceiver;
31 import android.content.ClipData;
32 import android.content.ClipboardManager;
33 import android.content.Context;
34 import android.content.Intent;
35 import android.content.IntentFilter;
36 import android.content.SharedPreferences;
37 import android.content.pm.PackageManager;
38 import android.content.res.Configuration;
39 import android.database.Cursor;
40 import android.graphics.Bitmap;
41 import android.graphics.BitmapFactory;
42 import android.graphics.Typeface;
43 import android.graphics.drawable.BitmapDrawable;
44 import android.graphics.drawable.Drawable;
45 import android.net.Uri;
46 import android.net.http.SslCertificate;
47 import android.net.http.SslError;
48 import android.os.AsyncTask;
49 import android.os.Build;
50 import android.os.Bundle;
51 import android.os.Environment;
52 import android.os.Handler;
53 import android.os.Message;
54 import android.preference.PreferenceManager;
55 import android.print.PrintDocumentAdapter;
56 import android.print.PrintManager;
57 import android.provider.DocumentsContract;
58 import android.text.Editable;
59 import android.text.Spanned;
60 import android.text.TextWatcher;
61 import android.text.style.ForegroundColorSpan;
62 import android.util.Patterns;
63 import android.util.TypedValue;
64 import android.view.ContextMenu;
65 import android.view.GestureDetector;
66 import android.view.KeyEvent;
67 import android.view.Menu;
68 import android.view.MenuItem;
69 import android.view.MotionEvent;
70 import android.view.View;
71 import android.view.ViewGroup;
72 import android.view.WindowManager;
73 import android.view.inputmethod.InputMethodManager;
74 import android.webkit.CookieManager;
75 import android.webkit.HttpAuthHandler;
76 import android.webkit.SslErrorHandler;
77 import android.webkit.ValueCallback;
78 import android.webkit.WebBackForwardList;
79 import android.webkit.WebChromeClient;
80 import android.webkit.WebResourceResponse;
81 import android.webkit.WebSettings;
82 import android.webkit.WebStorage;
83 import android.webkit.WebView;
84 import android.webkit.WebViewClient;
85 import android.webkit.WebViewDatabase;
86 import android.widget.ArrayAdapter;
87 import android.widget.CheckBox;
88 import android.widget.CursorAdapter;
89 import android.widget.EditText;
90 import android.widget.FrameLayout;
91 import android.widget.ImageView;
92 import android.widget.LinearLayout;
93 import android.widget.ListView;
94 import android.widget.ProgressBar;
95 import android.widget.RadioButton;
96 import android.widget.RelativeLayout;
97 import android.widget.TextView;
98
99 import androidx.annotation.NonNull;
100 import androidx.appcompat.app.ActionBar;
101 import androidx.appcompat.app.ActionBarDrawerToggle;
102 import androidx.appcompat.app.AppCompatActivity;
103 import androidx.appcompat.app.AppCompatDelegate;
104 import androidx.appcompat.widget.Toolbar;
105 import androidx.coordinatorlayout.widget.CoordinatorLayout;
106 import androidx.core.content.res.ResourcesCompat;
107 import androidx.core.view.GravityCompat;
108 import androidx.drawerlayout.widget.DrawerLayout;
109 import androidx.fragment.app.DialogFragment;
110 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
111 import androidx.viewpager.widget.ViewPager;
112 import androidx.webkit.WebSettingsCompat;
113 import androidx.webkit.WebViewFeature;
114
115 import com.google.android.material.appbar.AppBarLayout;
116 import com.google.android.material.floatingactionbutton.FloatingActionButton;
117 import com.google.android.material.navigation.NavigationView;
118 import com.google.android.material.snackbar.Snackbar;
119 import com.google.android.material.tabs.TabLayout;
120
121 import com.stoutner.privacybrowser.BuildConfig;
122 import com.stoutner.privacybrowser.R;
123 import com.stoutner.privacybrowser.adapters.WebViewPagerAdapter;
124 import com.stoutner.privacybrowser.asynctasks.GetHostIpAddresses;
125 import com.stoutner.privacybrowser.asynctasks.PopulateBlocklists;
126 import com.stoutner.privacybrowser.asynctasks.PrepareSaveDialog;
127 import com.stoutner.privacybrowser.asynctasks.SaveUrl;
128 import com.stoutner.privacybrowser.asynctasks.SaveWebpageImage;
129 import com.stoutner.privacybrowser.dialogs.AdConsentDialog;
130 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
131 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
132 import com.stoutner.privacybrowser.dialogs.CreateHomeScreenShortcutDialog;
133 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
134 import com.stoutner.privacybrowser.dialogs.FontSizeDialog;
135 import com.stoutner.privacybrowser.dialogs.HttpAuthenticationDialog;
136 import com.stoutner.privacybrowser.dialogs.OpenDialog;
137 import com.stoutner.privacybrowser.dialogs.ProxyNotInstalledDialog;
138 import com.stoutner.privacybrowser.dialogs.PinnedMismatchDialog;
139 import com.stoutner.privacybrowser.dialogs.SaveWebpageDialog;
140 import com.stoutner.privacybrowser.dialogs.SslCertificateErrorDialog;
141 import com.stoutner.privacybrowser.dialogs.UrlHistoryDialog;
142 import com.stoutner.privacybrowser.dialogs.ViewSslCertificateDialog;
143 import com.stoutner.privacybrowser.dialogs.WaitingForProxyDialog;
144 import com.stoutner.privacybrowser.fragments.WebViewTabFragment;
145 import com.stoutner.privacybrowser.helpers.AdHelper;
146 import com.stoutner.privacybrowser.helpers.BlocklistHelper;
147 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
148 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
149 import com.stoutner.privacybrowser.helpers.ProxyHelper;
150 import com.stoutner.privacybrowser.views.NestedScrollWebView;
151
152 import java.io.ByteArrayInputStream;
153 import java.io.ByteArrayOutputStream;
154 import java.io.File;
155 import java.io.FileInputStream;
156 import java.io.FileOutputStream;
157 import java.io.IOException;
158 import java.io.InputStream;
159 import java.io.OutputStream;
160 import java.io.UnsupportedEncodingException;
161
162 import java.net.MalformedURLException;
163 import java.net.URL;
164 import java.net.URLDecoder;
165 import java.net.URLEncoder;
166
167 import java.text.NumberFormat;
168
169 import java.util.ArrayList;
170 import java.util.Calendar;
171 import java.util.Date;
172 import java.util.HashMap;
173 import java.util.HashSet;
174 import java.util.List;
175 import java.util.Map;
176 import java.util.Objects;
177 import java.util.Set;
178 import java.util.concurrent.ExecutorService;
179 import java.util.concurrent.Executors;
180
181 public class MainWebViewActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener,
182         EditBookmarkFolderDialog.EditBookmarkFolderListener, FontSizeDialog.UpdateFontSizeListener, NavigationView.OnNavigationItemSelectedListener, OpenDialog.OpenListener,
183         PinnedMismatchDialog.PinnedMismatchListener, PopulateBlocklists.PopulateBlocklistsListener, SaveWebpageDialog.SaveWebpageListener, UrlHistoryDialog.NavigateHistoryListener,
184         WebViewTabFragment.NewTabListener {
185
186     // The executor service handles background tasks.  It is accessed from `ViewSourceActivity`.
187     public static ExecutorService executorService = Executors.newFixedThreadPool(4);
188
189     // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()`, `onResume()`, and `applyProxy()`.
190     public static String orbotStatus = "unknown";
191
192     // The WebView pager adapter is accessed from `HttpAuthenticationDialog`, `PinnedMismatchDialog`, and `SslCertificateErrorDialog`.  It is also used in `onCreate()`, `onResume()`, and `addTab()`.
193     public static WebViewPagerAdapter webViewPagerAdapter;
194
195     // `restartFromBookmarksActivity` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onRestart()`.
196     public static boolean restartFromBookmarksActivity;
197
198     // `currentBookmarksFolder` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onCreate()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`,
199     // `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
200     public static String currentBookmarksFolder;
201
202     // The user agent constants are public static so they can be accessed from `SettingsFragment`, `DomainsActivity`, and `DomainSettingsFragment`.
203     public final static int UNRECOGNIZED_USER_AGENT = -1;
204     public final static int SETTINGS_WEBVIEW_DEFAULT_USER_AGENT = 1;
205     public final static int SETTINGS_CUSTOM_USER_AGENT = 12;
206     public final static int DOMAINS_SYSTEM_DEFAULT_USER_AGENT = 0;
207     public final static int DOMAINS_WEBVIEW_DEFAULT_USER_AGENT = 2;
208     public final static int DOMAINS_CUSTOM_USER_AGENT = 13;
209
210     // Define the start activity for result request codes.  The public static entries are accessed from `OpenDialog()` and `SaveWebpageDialog()`.
211     private final int BROWSE_FILE_UPLOAD_REQUEST_CODE = 0;
212     public final static int BROWSE_OPEN_REQUEST_CODE = 1;
213     public final static int BROWSE_SAVE_WEBPAGE_REQUEST_CODE = 2;
214
215     // The proxy mode is public static so it can be accessed from `ProxyHelper()`.
216     // It is also used in `onRestart()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `applyAppSettings()`, and `applyProxy()`.
217     // It will be updated in `applyAppSettings()`, but it needs to be initialized here or the first run of `onPrepareOptionsMenu()` crashes.
218     public static String proxyMode = ProxyHelper.NONE;
219
220     // Define the saved instance state constants.
221     private final String SAVED_STATE_ARRAY_LIST = "saved_state_array_list";
222     private final String SAVED_NESTED_SCROLL_WEBVIEW_STATE_ARRAY_LIST = "saved_nested_scroll_webview_state_array_list";
223     private final String SAVED_TAB_POSITION = "saved_tab_position";
224     private final String PROXY_MODE = "proxy_mode";
225
226     // Define the saved instance state variables.
227     private ArrayList<Bundle> savedStateArrayList;
228     private ArrayList<Bundle> savedNestedScrollWebViewStateArrayList;
229     private int savedTabPosition;
230     private String savedProxyMode;
231
232     // Define the class variables.
233     @SuppressWarnings("rawtypes")
234     AsyncTask populateBlocklists;
235
236     // The current WebView is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`,
237     // `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`, `onSslMismatchBack()`, `applyProxy()`, and `applyDomainSettings()`.
238     private NestedScrollWebView currentWebView;
239
240     // `customHeader` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateContextMenu()`, and `loadUrl()`.
241     private final Map<String, String> customHeaders = new HashMap<>();
242
243     // The search URL is set in `applyAppSettings()` and used in `onNewIntent()`, `loadUrlFromTextBox()`, `initializeApp()`, and `initializeWebView()`.
244     private String searchURL;
245
246     // The blocklists are populated in `finishedPopulatingBlocklists()` and accessed from `initializeWebView()`.
247     private ArrayList<List<String[]>> easyList;
248     private ArrayList<List<String[]>> easyPrivacy;
249     private ArrayList<List<String[]>> fanboysAnnoyanceList;
250     private ArrayList<List<String[]>> fanboysSocialList;
251     private ArrayList<List<String[]>> ultraList;
252     private ArrayList<List<String[]>> ultraPrivacy;
253
254     // Declare the class variables
255     private BroadcastReceiver orbotStatusBroadcastReceiver;
256     private String webViewDefaultUserAgent;
257     private boolean incognitoModeEnabled;
258     private boolean fullScreenBrowsingModeEnabled;
259     private boolean inFullScreenBrowsingMode;
260     private boolean downloadWithExternalApp;
261     private boolean hideAppBar;
262     private boolean scrollAppBar;
263     private boolean bottomAppBar;
264     private boolean loadingNewIntent;
265     private boolean reapplyDomainSettingsOnRestart;
266     private boolean reapplyAppSettingsOnRestart;
267     private boolean displayingFullScreenVideo;
268     private boolean waitingForProxy;
269
270     // The action bar drawer toggle is initialized in `onCreate()` and used in `onResume()`.
271     private ActionBarDrawerToggle actionBarDrawerToggle;
272
273     // The color spans are used in `onCreate()` and `highlightUrlText()`.
274     private ForegroundColorSpan redColorSpan;
275     private ForegroundColorSpan initialGrayColorSpan;
276     private ForegroundColorSpan finalGrayColorSpan;
277
278     // `bookmarksDatabaseHelper` is used in `onCreate()`, `onDestroy`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`,
279     // and `loadBookmarksFolder()`.
280     private BookmarksDatabaseHelper bookmarksDatabaseHelper;
281
282     // `bookmarksCursor` is used in `onDestroy()`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
283     private Cursor bookmarksCursor;
284
285     // `bookmarksCursorAdapter` is used in `onCreateBookmark()`, `onCreateBookmarkFolder()` `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
286     private CursorAdapter bookmarksCursorAdapter;
287
288     // `oldFolderNameString` is used in `onCreate()` and `onSaveEditBookmarkFolder()`.
289     private String oldFolderNameString;
290
291     // `fileChooserCallback` is used in `onCreate()` and `onActivityResult()`.
292     private ValueCallback<Uri[]> fileChooserCallback;
293
294     // The default progress view offsets are set in `onCreate()` and used in `initializeWebView()`.
295     private int appBarHeight;
296     private int defaultProgressViewStartOffset;
297     private int defaultProgressViewEndOffset;
298
299     // The URL sanitizers are set in `applyAppSettings()` and used in `sanitizeUrl()`.
300     private boolean sanitizeGoogleAnalytics;
301     private boolean sanitizeFacebookClickIds;
302     private boolean sanitizeTwitterAmpRedirects;
303
304     // Define the class variables.
305     private long lastScrollUpdate = 0;
306
307     // Declare the class views.
308     private FrameLayout rootFrameLayout;
309     private DrawerLayout drawerLayout;
310     private RelativeLayout mainContentRelativeLayout;
311     private AppBarLayout appBarLayout;
312     private Toolbar toolbar;
313     private RelativeLayout urlRelativeLayout;
314     private EditText urlEditText;
315     private ActionBar actionBar;
316     private LinearLayout findOnPageLinearLayout;
317     private LinearLayout tabsLinearLayout;
318     private TabLayout tabLayout;
319     private SwipeRefreshLayout swipeRefreshLayout;
320     private ViewPager webViewPager;
321     private FrameLayout fullScreenVideoFrameLayout;
322
323     // Declare the class menus.
324     private Menu optionsMenu;
325
326     // Declare the class menu items.
327     private MenuItem navigationBackMenuItem;
328     private MenuItem navigationForwardMenuItem;
329     private MenuItem navigationHistoryMenuItem;
330     private MenuItem navigationRequestsMenuItem;
331     private MenuItem optionsPrivacyMenuItem;
332     private MenuItem optionsRefreshMenuItem;
333     private MenuItem optionsCookiesMenuItem;
334     private MenuItem optionsDomStorageMenuItem;
335     private MenuItem optionsSaveFormDataMenuItem;
336     private MenuItem optionsClearDataMenuItem;
337     private MenuItem optionsClearCookiesMenuItem;
338     private MenuItem optionsClearDomStorageMenuItem;
339     private MenuItem optionsClearFormDataMenuItem;
340     private MenuItem optionsBlocklistsMenuItem;
341     private MenuItem optionsEasyListMenuItem;
342     private MenuItem optionsEasyPrivacyMenuItem;
343     private MenuItem optionsFanboysAnnoyanceListMenuItem;
344     private MenuItem optionsFanboysSocialBlockingListMenuItem;
345     private MenuItem optionsUltraListMenuItem;
346     private MenuItem optionsUltraPrivacyMenuItem;
347     private MenuItem optionsBlockAllThirdPartyRequestsMenuItem;
348     private MenuItem optionsProxyMenuItem;
349     private MenuItem optionsProxyNoneMenuItem;
350     private MenuItem optionsProxyTorMenuItem;
351     private MenuItem optionsProxyI2pMenuItem;
352     private MenuItem optionsProxyCustomMenuItem;
353     private MenuItem optionsUserAgentMenuItem;
354     private MenuItem optionsUserAgentPrivacyBrowserMenuItem;
355     private MenuItem optionsUserAgentWebViewDefaultMenuItem;
356     private MenuItem optionsUserAgentFirefoxOnAndroidMenuItem;
357     private MenuItem optionsUserAgentChromeOnAndroidMenuItem;
358     private MenuItem optionsUserAgentSafariOnIosMenuItem;
359     private MenuItem optionsUserAgentFirefoxOnLinuxMenuItem;
360     private MenuItem optionsUserAgentChromiumOnLinuxMenuItem;
361     private MenuItem optionsUserAgentFirefoxOnWindowsMenuItem;
362     private MenuItem optionsUserAgentChromeOnWindowsMenuItem;
363     private MenuItem optionsUserAgentEdgeOnWindowsMenuItem;
364     private MenuItem optionsUserAgentInternetExplorerOnWindowsMenuItem;
365     private MenuItem optionsUserAgentSafariOnMacosMenuItem;
366     private MenuItem optionsUserAgentCustomMenuItem;
367     private MenuItem optionsSwipeToRefreshMenuItem;
368     private MenuItem optionsWideViewportMenuItem;
369     private MenuItem optionsDisplayImagesMenuItem;
370     private MenuItem optionsDarkWebViewMenuItem;
371     private MenuItem optionsFontSizeMenuItem;
372     private MenuItem optionsAddOrEditDomainMenuItem;
373
374     @Override
375     // Remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
376     @SuppressLint("ClickableViewAccessibility")
377     protected void onCreate(Bundle savedInstanceState) {
378         // Run the default commands.
379         super.onCreate(savedInstanceState);
380
381         // Check to see if the activity has been restarted.
382         if (savedInstanceState != null) {
383             // Store the saved instance state variables.
384             savedStateArrayList = savedInstanceState.getParcelableArrayList(SAVED_STATE_ARRAY_LIST);
385             savedNestedScrollWebViewStateArrayList = savedInstanceState.getParcelableArrayList(SAVED_NESTED_SCROLL_WEBVIEW_STATE_ARRAY_LIST);
386             savedTabPosition = savedInstanceState.getInt(SAVED_TAB_POSITION);
387             savedProxyMode = savedInstanceState.getString(PROXY_MODE);
388         }
389
390         // Initialize the default preference values the first time the program is run.  `false` keeps this command from resetting any current preferences back to default.
391         PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
392
393         // Get a handle for the shared preferences.
394         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
395
396         // Get the preferences.
397         String appTheme = sharedPreferences.getString("app_theme", getString(R.string.app_theme_default_value));
398         boolean allowScreenshots = sharedPreferences.getBoolean(getString(R.string.allow_screenshots_key), false);
399         bottomAppBar = sharedPreferences.getBoolean(getString(R.string.bottom_app_bar_key), false);
400
401         // Get the theme entry values string array.
402         String[] appThemeEntryValuesStringArray = getResources().getStringArray(R.array.app_theme_entry_values);
403
404         // Set the app theme according to the preference.  A switch statement cannot be used because the theme entry values string array is not a compile time constant.
405         if (appTheme.equals(appThemeEntryValuesStringArray[1])) {  // The light theme is selected.
406             // Apply the light theme.
407             AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
408         } else if (appTheme.equals(appThemeEntryValuesStringArray[2])) {  // The dark theme is selected.
409             // Apply the dark theme.
410             AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
411         } else {  // The system default theme is selected.
412             if (Build.VERSION.SDK_INT >= 28) {  // The system default theme is supported.
413                 // Follow the system default theme.
414                 AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM);
415             } else {  // The system default theme is not supported.
416                 // Follow the battery saver mode.
417                 AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY);
418             }
419         }
420
421         // Disable screenshots if not allowed.
422         if (!allowScreenshots) {
423             getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
424         }
425
426         // 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.
427         if (Build.VERSION.SDK_INT >= 21) {
428             WebView.enableSlowWholeDocumentDraw();
429         }
430
431         // Set the theme.
432         setTheme(R.style.PrivacyBrowser);
433
434         // Set the content view.
435         if (bottomAppBar) {
436             setContentView(R.layout.main_framelayout_bottom_appbar);
437         } else {
438             setContentView(R.layout.main_framelayout_top_appbar);
439         }
440
441         // Get handles for the views.
442         rootFrameLayout = findViewById(R.id.root_framelayout);
443         drawerLayout = findViewById(R.id.drawerlayout);
444         mainContentRelativeLayout = findViewById(R.id.main_content_relativelayout);
445         appBarLayout = findViewById(R.id.appbar_layout);
446         toolbar = findViewById(R.id.toolbar);
447         findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
448         tabsLinearLayout = findViewById(R.id.tabs_linearlayout);
449         tabLayout = findViewById(R.id.tablayout);
450         swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
451         webViewPager = findViewById(R.id.webviewpager);
452         fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
453
454         // Get a handle for the navigation view.
455         NavigationView navigationView = findViewById(R.id.navigationview);
456
457         // Get a handle for the navigation menu.
458         Menu navigationMenu = navigationView.getMenu();
459
460         // Get handles for the navigation menu items.
461         navigationBackMenuItem = navigationMenu.findItem(R.id.back);
462         navigationForwardMenuItem = navigationMenu.findItem(R.id.forward);
463         navigationHistoryMenuItem = navigationMenu.findItem(R.id.history);
464         navigationRequestsMenuItem = navigationMenu.findItem(R.id.requests);
465
466         // Listen for touches on the navigation menu.
467         navigationView.setNavigationItemSelectedListener(this);
468
469         // Get a handle for the app compat delegate.
470         AppCompatDelegate appCompatDelegate = getDelegate();
471
472         // Set the support action bar.
473         appCompatDelegate.setSupportActionBar(toolbar);
474
475         // Get a handle for the action bar.
476         actionBar = appCompatDelegate.getSupportActionBar();
477
478         // Remove the incorrect lint warning below that the action bar might be null.
479         assert actionBar != null;
480
481         // Add the custom layout, which shows the URL text bar.
482         actionBar.setCustomView(R.layout.url_app_bar);
483         actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
484
485         // Get handles for the views in the URL app bar.
486         urlRelativeLayout = findViewById(R.id.url_relativelayout);
487         urlEditText = findViewById(R.id.url_edittext);
488
489         // Create the hamburger icon at the start of the AppBar.
490         actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.open_navigation_drawer, R.string.close_navigation_drawer);
491
492         // Initially disable the sliding drawers.  They will be enabled once the blocklists are loaded.
493         drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
494
495         // Initialize the web view pager adapter.
496         webViewPagerAdapter = new WebViewPagerAdapter(getSupportFragmentManager());
497
498         // Set the pager adapter on the web view pager.
499         webViewPager.setAdapter(webViewPagerAdapter);
500
501         // Store up to 100 tabs in memory.
502         webViewPager.setOffscreenPageLimit(100);
503
504         // Initialize the app.
505         initializeApp();
506
507         // Apply the app settings from the shared preferences.
508         applyAppSettings();
509
510         // Populate the blocklists.
511         populateBlocklists = new PopulateBlocklists(this, this).execute();
512     }
513
514     @Override
515     protected void onNewIntent(Intent intent) {
516         // Run the default commands.
517         super.onNewIntent(intent);
518
519         // Replace the intent that started the app with this one.
520         setIntent(intent);
521
522         // Check to see if the app is being restarted from a saved state.
523         if (savedStateArrayList == null || savedStateArrayList.size() == 0) {  // The activity is not being restarted from a saved state.
524             // Get the information from the intent.
525             String intentAction = intent.getAction();
526             Uri intentUriData = intent.getData();
527             String intentStringExtra = intent.getStringExtra(Intent.EXTRA_TEXT);
528
529             // Determine if this is a web search.
530             boolean isWebSearch = ((intentAction != null) && intentAction.equals(Intent.ACTION_WEB_SEARCH));
531
532             // 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.
533             if (intentUriData != null || intentStringExtra != null || isWebSearch) {
534                 // Exit the full screen video if it is displayed.
535                 if (displayingFullScreenVideo) {
536                     // Exit full screen video mode.
537                     exitFullScreenVideo();
538
539                     // Reload the current WebView.  Otherwise, it can display entirely black.
540                     currentWebView.reload();
541                 }
542
543                 // Get the shared preferences.
544                 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
545
546                 // Create a URL string.
547                 String url;
548
549                 // If the intent action is a web search, perform the search.
550                 if (isWebSearch) {  // The intent is a web search.
551                     // Create an encoded URL string.
552                     String encodedUrlString;
553
554                     // Sanitize the search input and convert it to a search.
555                     try {
556                         encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
557                     } catch (UnsupportedEncodingException exception) {
558                         encodedUrlString = "";
559                     }
560
561                     // Add the base search URL.
562                     url = searchURL + encodedUrlString;
563                 } else if (intentUriData != null) {  // The intent contains a URL formatted as a URI.
564                     // Set the intent data as the URL.
565                     url = intentUriData.toString();
566                 } else {  // The intent contains a string, which might be a URL.
567                     // Set the intent string as the URL.
568                     url = intentStringExtra;
569                 }
570
571                 // Add a new tab if specified in the preferences.
572                 if (sharedPreferences.getBoolean("open_intents_in_new_tab", true)) {  // Load the URL in a new tab.
573                     // Set the loading new intent flag.
574                     loadingNewIntent = true;
575
576                     // Add a new tab.
577                     addNewTab(url, true);
578                 } else {  // Load the URL in the current tab.
579                     // Make it so.
580                     loadUrl(currentWebView, url);
581                 }
582
583                 // Close the navigation drawer if it is open.
584                 if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
585                     drawerLayout.closeDrawer(GravityCompat.START);
586                 }
587
588                 // Close the bookmarks drawer if it is open.
589                 if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
590                     drawerLayout.closeDrawer(GravityCompat.END);
591                 }
592             }
593         }
594     }
595
596     @Override
597     public void onRestart() {
598         // Run the default commands.
599         super.onRestart();
600
601         // Apply the app settings if returning from the Settings activity.
602         if (reapplyAppSettingsOnRestart) {
603             // Reset the reapply app settings on restart tracker.
604             reapplyAppSettingsOnRestart = false;
605
606             // Apply the app settings.
607             applyAppSettings();
608         }
609
610         // Apply the domain settings if returning from the settings or domains activity.
611         if (reapplyDomainSettingsOnRestart) {
612             // Reset the reapply domain settings on restart tracker.
613             reapplyDomainSettingsOnRestart = false;
614
615             // Reapply the domain settings for each tab.
616             for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
617                 // Get the WebView tab fragment.
618                 WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
619
620                 // Get the fragment view.
621                 View fragmentView = webViewTabFragment.getView();
622
623                 // Only reload the WebViews if they exist.
624                 if (fragmentView != null) {
625                     // Get the nested scroll WebView from the tab fragment.
626                     NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
627
628                     // Reset the current domain name so the domain settings will be reapplied.
629                     nestedScrollWebView.resetCurrentDomainName();
630
631                     // Reapply the domain settings if the URL is not null, which can happen if an empty tab is active when returning from settings.
632                     if (nestedScrollWebView.getUrl() != null) {
633                         applyDomainSettings(nestedScrollWebView, nestedScrollWebView.getUrl(), false, true, false);
634                     }
635                 }
636             }
637         }
638
639         // Update the bookmarks drawer if returning from the Bookmarks activity.
640         if (restartFromBookmarksActivity) {
641             // Close the bookmarks drawer.
642             drawerLayout.closeDrawer(GravityCompat.END);
643
644             // Reload the bookmarks drawer.
645             loadBookmarksFolder();
646
647             // Reset `restartFromBookmarksActivity`.
648             restartFromBookmarksActivity = false;
649         }
650
651         // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
652         updatePrivacyIcons(true);
653     }
654
655     // `onStart()` runs after `onCreate()` or `onRestart()`.  This is used instead of `onResume()` so the commands aren't called every time the screen is partially hidden.
656     @Override
657     public void onStart() {
658         // Run the default commands.
659         super.onStart();
660
661         // Resume any WebViews.
662         for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
663             // Get the WebView tab fragment.
664             WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
665
666             // Get the fragment view.
667             View fragmentView = webViewTabFragment.getView();
668
669             // Only resume the WebViews if they exist (they won't when the app is first created).
670             if (fragmentView != null) {
671                 // Get the nested scroll WebView from the tab fragment.
672                 NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
673
674                 // Resume the nested scroll WebView.
675                 nestedScrollWebView.onResume();
676             }
677         }
678
679         // Resume the nested scroll WebView JavaScript timers.  This is a global command that resumes JavaScript timers on all WebViews.
680         if (currentWebView != null) {
681             currentWebView.resumeTimers();
682         }
683
684         // Reapply the proxy settings if the system is using a proxy.  This redisplays the appropriate alert dialog.
685         if (!proxyMode.equals(ProxyHelper.NONE)) {
686             applyProxy(false);
687         }
688
689         // Reapply any system UI flags and the ad in the free flavor.
690         if (displayingFullScreenVideo || inFullScreenBrowsingMode) {  // The system is displaying a website or a video in full screen mode.
691             /* Hide the system bars.
692              * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
693              * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
694              * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
695              * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
696              */
697             rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
698                     View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
699         } else if (BuildConfig.FLAVOR.contentEquals("free")) {  // The system in not in full screen mode.
700             // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
701             View adView = findViewById(R.id.adview);
702
703             // Resume the ad.
704             AdHelper.resumeAd(adView);
705         }
706     }
707
708     // `onStop()` runs after `onPause()`.  It is used instead of `onPause()` so the commands are not called every time the screen is partially hidden.
709     @Override
710     public void onStop() {
711         // Run the default commands.
712         super.onStop();
713
714         for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
715             // Get the WebView tab fragment.
716             WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
717
718             // Get the fragment view.
719             View fragmentView = webViewTabFragment.getView();
720
721             // Only pause the WebViews if they exist (they won't when the app is first created).
722             if (fragmentView != null) {
723                 // Get the nested scroll WebView from the tab fragment.
724                 NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
725
726                 // Pause the nested scroll WebView.
727                 nestedScrollWebView.onPause();
728             }
729         }
730
731         // Pause the WebView JavaScript timers.  This is a global command that pauses JavaScript on all WebViews.
732         if (currentWebView != null) {
733             currentWebView.pauseTimers();
734         }
735
736         // Pause the ad or it will continue to consume resources in the background on the free flavor.
737         if (BuildConfig.FLAVOR.contentEquals("free")) {
738             // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
739             View adView = findViewById(R.id.adview);
740
741             // Pause the ad.
742             AdHelper.pauseAd(adView);
743         }
744     }
745
746     @Override
747     public void onSaveInstanceState(@NonNull Bundle savedInstanceState) {
748         // Run the default commands.
749         super.onSaveInstanceState(savedInstanceState);
750
751         // Create the saved state array lists.
752         ArrayList<Bundle> savedStateArrayList = new ArrayList<>();
753         ArrayList<Bundle> savedNestedScrollWebViewStateArrayList = new ArrayList<>();
754
755         // Get the URLs from each tab.
756         for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
757             // Get the WebView tab fragment.
758             WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
759
760             // Get the fragment view.
761             View fragmentView = webViewTabFragment.getView();
762
763             if (fragmentView != null) {
764                 // Get the nested scroll WebView from the tab fragment.
765                 NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
766
767                 // Create saved state bundle.
768                 Bundle savedStateBundle = new Bundle();
769
770                 // Get the current states.
771                 nestedScrollWebView.saveState(savedStateBundle);
772                 Bundle savedNestedScrollWebViewStateBundle = nestedScrollWebView.saveNestedScrollWebViewState();
773
774                 // Store the saved states in the array lists.
775                 savedStateArrayList.add(savedStateBundle);
776                 savedNestedScrollWebViewStateArrayList.add(savedNestedScrollWebViewStateBundle);
777             }
778         }
779
780         // Get the current tab position.
781         int currentTabPosition = tabLayout.getSelectedTabPosition();
782
783         // Store the saved states in the bundle.
784         savedInstanceState.putParcelableArrayList(SAVED_STATE_ARRAY_LIST, savedStateArrayList);
785         savedInstanceState.putParcelableArrayList(SAVED_NESTED_SCROLL_WEBVIEW_STATE_ARRAY_LIST, savedNestedScrollWebViewStateArrayList);
786         savedInstanceState.putInt(SAVED_TAB_POSITION, currentTabPosition);
787         savedInstanceState.putString(PROXY_MODE, proxyMode);
788     }
789
790     @Override
791     public void onDestroy() {
792         // Unregister the orbot status broadcast receiver if it exists.
793         if (orbotStatusBroadcastReceiver != null) {
794             this.unregisterReceiver(orbotStatusBroadcastReceiver);
795         }
796
797         // Close the bookmarks cursor if it exists.
798         if (bookmarksCursor != null) {
799             bookmarksCursor.close();
800         }
801
802         // Close the bookmarks database if it exists.
803         if (bookmarksDatabaseHelper != null) {
804             bookmarksDatabaseHelper.close();
805         }
806
807         // Stop populating the blocklists if the AsyncTask is running in the background.
808         if (populateBlocklists != null) {
809             populateBlocklists.cancel(true);
810         }
811
812         // Run the default commands.
813         super.onDestroy();
814     }
815
816     @Override
817     public boolean onCreateOptionsMenu(Menu menu) {
818         // Inflate the menu.  This adds items to the action bar if it is present.
819         getMenuInflater().inflate(R.menu.webview_options_menu, menu);
820
821         // Store a handle for the options menu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons()`.
822         optionsMenu = menu;
823
824         // Get handles for the class menu items.
825         optionsPrivacyMenuItem = menu.findItem(R.id.javascript);
826         optionsRefreshMenuItem = menu.findItem(R.id.refresh);
827         optionsCookiesMenuItem = menu.findItem(R.id.cookies);
828         optionsDomStorageMenuItem = menu.findItem(R.id.dom_storage);
829         optionsSaveFormDataMenuItem = menu.findItem(R.id.save_form_data);  // Form data can be removed once the minimum API >= 26.
830         optionsClearDataMenuItem = menu.findItem(R.id.clear_data);
831         optionsClearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
832         optionsClearDomStorageMenuItem = menu.findItem(R.id.clear_dom_storage);
833         optionsClearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
834         optionsBlocklistsMenuItem = menu.findItem(R.id.blocklists);
835         optionsEasyListMenuItem = menu.findItem(R.id.easylist);
836         optionsEasyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
837         optionsFanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
838         optionsFanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
839         optionsUltraListMenuItem = menu.findItem(R.id.ultralist);
840         optionsUltraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
841         optionsBlockAllThirdPartyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
842         optionsProxyMenuItem = menu.findItem(R.id.proxy);
843         optionsProxyNoneMenuItem = menu.findItem(R.id.proxy_none);
844         optionsProxyTorMenuItem = menu.findItem(R.id.proxy_tor);
845         optionsProxyI2pMenuItem = menu.findItem(R.id.proxy_i2p);
846         optionsProxyCustomMenuItem = menu.findItem(R.id.proxy_custom);
847         optionsUserAgentMenuItem = menu.findItem(R.id.user_agent);
848         optionsUserAgentPrivacyBrowserMenuItem = menu.findItem(R.id.user_agent_privacy_browser);
849         optionsUserAgentWebViewDefaultMenuItem = menu.findItem(R.id.user_agent_webview_default);
850         optionsUserAgentFirefoxOnAndroidMenuItem = menu.findItem(R.id.user_agent_firefox_on_android);
851         optionsUserAgentChromeOnAndroidMenuItem = menu.findItem(R.id.user_agent_chrome_on_android);
852         optionsUserAgentSafariOnIosMenuItem = menu.findItem(R.id.user_agent_safari_on_ios);
853         optionsUserAgentFirefoxOnLinuxMenuItem = menu.findItem(R.id.user_agent_firefox_on_linux);
854         optionsUserAgentChromiumOnLinuxMenuItem = menu.findItem(R.id.user_agent_chromium_on_linux);
855         optionsUserAgentFirefoxOnWindowsMenuItem = menu.findItem(R.id.user_agent_firefox_on_windows);
856         optionsUserAgentChromeOnWindowsMenuItem = menu.findItem(R.id.user_agent_chrome_on_windows);
857         optionsUserAgentEdgeOnWindowsMenuItem = menu.findItem(R.id.user_agent_edge_on_windows);
858         optionsUserAgentInternetExplorerOnWindowsMenuItem = menu.findItem(R.id.user_agent_internet_explorer_on_windows);
859         optionsUserAgentSafariOnMacosMenuItem = menu.findItem(R.id.user_agent_safari_on_macos);
860         optionsUserAgentCustomMenuItem = menu.findItem(R.id.user_agent_custom);
861         optionsSwipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
862         optionsWideViewportMenuItem = menu.findItem(R.id.wide_viewport);
863         optionsDisplayImagesMenuItem = menu.findItem(R.id.display_images);
864         optionsDarkWebViewMenuItem = menu.findItem(R.id.dark_webview);
865         optionsFontSizeMenuItem = menu.findItem(R.id.font_size);
866         optionsAddOrEditDomainMenuItem = menu.findItem(R.id.add_or_edit_domain);
867
868         // Get handles for the method menu items.
869         MenuItem bookmarksMenuItem = menu.findItem(R.id.bookmarks);
870         MenuItem adConsentMenuItem = menu.findItem(R.id.ad_consent);
871
872         // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
873         updatePrivacyIcons(false);
874
875         // Only display the form data menu items if the API < 26.
876         optionsSaveFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
877         optionsClearFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
878
879         // Disable the clear form data menu item if the API >= 26 so that the status of the main Clear Data is calculated correctly.
880         optionsClearFormDataMenuItem.setEnabled(Build.VERSION.SDK_INT < 26);
881
882         // Only display the dark WebView menu item if API >= 21.
883         optionsDarkWebViewMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
884
885         // Only show Ad Consent if this is the free flavor.
886         adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
887
888         // Get the shared preferences.
889         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
890
891         // Get the dark theme and app bar preferences.
892         boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean(getString(R.string.display_additional_app_bar_icons_key), false);
893
894         // 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.
895         if (displayAdditionalAppBarIcons) {
896             optionsRefreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
897             bookmarksMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
898             optionsCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
899         } else { //Do not display the additional icons.
900             optionsRefreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
901             bookmarksMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
902             optionsCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
903         }
904
905         // Replace Refresh with Stop if a URL is already loading.
906         if (currentWebView != null && currentWebView.getProgress() != 100) {
907             // Set the title.
908             optionsRefreshMenuItem.setTitle(R.string.stop);
909
910             // Set the icon if it is displayed in the app bar.
911             if (displayAdditionalAppBarIcons) {
912                 // Get the current theme status.
913                 int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
914
915                 // Set the icon according to the current theme status.
916                 if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
917                     optionsRefreshMenuItem.setIcon(R.drawable.close_blue_day);
918                 } else {
919                     optionsRefreshMenuItem.setIcon(R.drawable.close_blue_night);
920                 }
921             }
922         }
923
924         // Done.
925         return true;
926     }
927
928     @Override
929     public boolean onPrepareOptionsMenu(Menu menu) {
930         // Get a handle for the cookie manager.
931         CookieManager cookieManager = CookieManager.getInstance();
932
933         // Initialize the current user agent string and the font size.
934         String currentUserAgent = getString(R.string.user_agent_privacy_browser);
935         int fontSize = 100;
936
937         // 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.
938         if (currentWebView != null) {
939             // Set the add or edit domain text.
940             if (currentWebView.getDomainSettingsApplied()) {
941                 optionsAddOrEditDomainMenuItem.setTitle(R.string.edit_domain_settings);
942             } else {
943                 optionsAddOrEditDomainMenuItem.setTitle(R.string.add_domain_settings);
944             }
945
946             // Get the current user agent from the WebView.
947             currentUserAgent = currentWebView.getSettings().getUserAgentString();
948
949             // Get the current font size from the
950             fontSize = currentWebView.getSettings().getTextZoom();
951
952             // Set the status of the menu item checkboxes.
953             optionsDomStorageMenuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
954             optionsSaveFormDataMenuItem.setChecked(currentWebView.getSettings().getSaveFormData());  // Form data can be removed once the minimum API >= 26.
955             optionsEasyListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
956             optionsEasyPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
957             optionsFanboysAnnoyanceListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
958             optionsFanboysSocialBlockingListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
959             optionsUltraListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
960             optionsUltraPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
961             optionsBlockAllThirdPartyRequestsMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
962             optionsSwipeToRefreshMenuItem.setChecked(currentWebView.getSwipeToRefresh());
963             optionsWideViewportMenuItem.setChecked(currentWebView.getSettings().getUseWideViewPort());
964             optionsDisplayImagesMenuItem.setChecked(currentWebView.getSettings().getLoadsImagesAutomatically());
965
966             // Initialize the display names for the blocklists with the number of blocked requests.
967             optionsBlocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + currentWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
968             optionsEasyListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASYLIST) + " - " + getString(R.string.easylist));
969             optionsEasyPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASYPRIVACY) + " - " + getString(R.string.easyprivacy));
970             optionsFanboysAnnoyanceListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST) + " - " + getString(R.string.fanboys_annoyance_list));
971             optionsFanboysSocialBlockingListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST) + " - " + getString(R.string.fanboys_social_blocking_list));
972             optionsUltraListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.ULTRALIST) + " - " + getString(R.string.ultralist));
973             optionsUltraPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.ULTRAPRIVACY) + " - " + getString(R.string.ultraprivacy));
974             optionsBlockAllThirdPartyRequestsMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS) + " - " + getString(R.string.block_all_third_party_requests));
975
976             // Enable DOM Storage if JavaScript is enabled.
977             optionsDomStorageMenuItem.setEnabled(currentWebView.getSettings().getJavaScriptEnabled());
978
979             // Set the checkbox status for dark WebView if the WebView supports it.
980             if (WebViewFeature.isFeatureSupported(WebViewFeature.FORCE_DARK)) {
981                 optionsDarkWebViewMenuItem.setChecked(WebSettingsCompat.getForceDark(currentWebView.getSettings()) == WebSettingsCompat.FORCE_DARK_ON);
982             }
983         }
984
985         // Set the cookies menu item checked status.
986         optionsCookiesMenuItem.setChecked(cookieManager.acceptCookie());
987
988         // Enable Clear Cookies if there are any.
989         optionsClearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
990
991         // 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`.
992         String privateDataDirectoryString = getApplicationInfo().dataDir;
993
994         // Get a count of the number of files in the Local Storage directory.
995         File localStorageDirectory = new File (privateDataDirectoryString + "/app_webview/Local Storage/");
996         int localStorageDirectoryNumberOfFiles = 0;
997         if (localStorageDirectory.exists()) {
998             // `Objects.requireNonNull` removes a lint warning that `localStorageDirectory.list` might produce a null pointed exception if it is dereferenced.
999             localStorageDirectoryNumberOfFiles = Objects.requireNonNull(localStorageDirectory.list()).length;
1000         }
1001
1002         // Get a count of the number of files in the IndexedDB directory.
1003         File indexedDBDirectory = new File (privateDataDirectoryString + "/app_webview/IndexedDB");
1004         int indexedDBDirectoryNumberOfFiles = 0;
1005         if (indexedDBDirectory.exists()) {
1006             // `Objects.requireNonNull` removes a lint warning that `indexedDBDirectory.list` might produce a null pointed exception if it is dereferenced.
1007             indexedDBDirectoryNumberOfFiles = Objects.requireNonNull(indexedDBDirectory.list()).length;
1008         }
1009
1010         // Enable Clear DOM Storage if there is any.
1011         optionsClearDomStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
1012
1013         // Enable Clear Form Data is there is any.  This can be removed once the minimum API >= 26.
1014         if (Build.VERSION.SDK_INT < 26) {
1015             // Get the WebView database.
1016             WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
1017
1018             // Enable the clear form data menu item if there is anything to clear.
1019             optionsClearFormDataMenuItem.setEnabled(webViewDatabase.hasFormData());
1020         }
1021
1022         // Enable Clear Data if any of the submenu items are enabled.
1023         optionsClearDataMenuItem.setEnabled(optionsClearCookiesMenuItem.isEnabled() || optionsClearDomStorageMenuItem.isEnabled() || optionsClearFormDataMenuItem.isEnabled());
1024
1025         // Disable Fanboy's Social Blocking List menu item if Fanboy's Annoyance List is checked.
1026         optionsFanboysSocialBlockingListMenuItem.setEnabled(!optionsFanboysAnnoyanceListMenuItem.isChecked());
1027
1028         // Set the proxy title and check the applied proxy.
1029         switch (proxyMode) {
1030             case ProxyHelper.NONE:
1031                 // Set the proxy title.
1032                 optionsProxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_none));
1033
1034                 // Check the proxy None radio button.
1035                 optionsProxyNoneMenuItem.setChecked(true);
1036                 break;
1037
1038             case ProxyHelper.TOR:
1039                 // Set the proxy title.
1040                 optionsProxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_tor));
1041
1042                 // Check the proxy Tor radio button.
1043                 optionsProxyTorMenuItem.setChecked(true);
1044                 break;
1045
1046             case ProxyHelper.I2P:
1047                 // Set the proxy title.
1048                 optionsProxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_i2p));
1049
1050                 // Check the proxy I2P radio button.
1051                 optionsProxyI2pMenuItem.setChecked(true);
1052                 break;
1053
1054             case ProxyHelper.CUSTOM:
1055                 // Set the proxy title.
1056                 optionsProxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_custom));
1057
1058                 // Check the proxy Custom radio button.
1059                 optionsProxyCustomMenuItem.setChecked(true);
1060                 break;
1061         }
1062
1063         // Select the current user agent menu item.  A switch statement cannot be used because the user agents are not compile time constants.
1064         if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[0])) {  // Privacy Browser.
1065             // Update the user agent menu item title.
1066             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_privacy_browser));
1067
1068             // Select the Privacy Browser radio box.
1069             optionsUserAgentPrivacyBrowserMenuItem.setChecked(true);
1070         } else if (currentUserAgent.equals(webViewDefaultUserAgent)) {  // WebView Default.
1071             // Update the user agent menu item title.
1072             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_webview_default));
1073
1074             // Select the WebView Default radio box.
1075             optionsUserAgentWebViewDefaultMenuItem.setChecked(true);
1076         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[2])) {  // Firefox on Android.
1077             // Update the user agent menu item title.
1078             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_firefox_on_android));
1079
1080             // Select the Firefox on Android radio box.
1081             optionsUserAgentFirefoxOnAndroidMenuItem.setChecked(true);
1082         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[3])) {  // Chrome on Android.
1083             // Update the user agent menu item title.
1084             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_chrome_on_android));
1085
1086             // Select the Chrome on Android radio box.
1087             optionsUserAgentChromeOnAndroidMenuItem.setChecked(true);
1088         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[4])) {  // Safari on iOS.
1089             // Update the user agent menu item title.
1090             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_safari_on_ios));
1091
1092             // Select the Safari on iOS radio box.
1093             optionsUserAgentSafariOnIosMenuItem.setChecked(true);
1094         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[5])) {  // Firefox on Linux.
1095             // Update the user agent menu item title.
1096             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_firefox_on_linux));
1097
1098             // Select the Firefox on Linux radio box.
1099             optionsUserAgentFirefoxOnLinuxMenuItem.setChecked(true);
1100         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[6])) {  // Chromium on Linux.
1101             // Update the user agent menu item title.
1102             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_chromium_on_linux));
1103
1104             // Select the Chromium on Linux radio box.
1105             optionsUserAgentChromiumOnLinuxMenuItem.setChecked(true);
1106         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[7])) {  // Firefox on Windows.
1107             // Update the user agent menu item title.
1108             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_firefox_on_windows));
1109
1110             // Select the Firefox on Windows radio box.
1111             optionsUserAgentFirefoxOnWindowsMenuItem.setChecked(true);
1112         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[8])) {  // Chrome on Windows.
1113             // Update the user agent menu item title.
1114             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_chrome_on_windows));
1115
1116             // Select the Chrome on Windows radio box.
1117             optionsUserAgentChromeOnWindowsMenuItem.setChecked(true);
1118         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[9])) {  // Edge on Windows.
1119             // Update the user agent menu item title.
1120             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_edge_on_windows));
1121
1122             // Select the Edge on Windows radio box.
1123             optionsUserAgentEdgeOnWindowsMenuItem.setChecked(true);
1124         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[10])) {  // Internet Explorer on Windows.
1125             // Update the user agent menu item title.
1126             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_internet_explorer_on_windows));
1127
1128             // Select the Internet on Windows radio box.
1129             optionsUserAgentInternetExplorerOnWindowsMenuItem.setChecked(true);
1130         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[11])) {  // Safari on macOS.
1131             // Update the user agent menu item title.
1132             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_safari_on_macos));
1133
1134             // Select the Safari on macOS radio box.
1135             optionsUserAgentSafariOnMacosMenuItem.setChecked(true);
1136         } else {  // Custom user agent.
1137             // Update the user agent menu item title.
1138             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_custom));
1139
1140             // Select the Custom radio box.
1141             optionsUserAgentCustomMenuItem.setChecked(true);
1142         }
1143
1144         // Set the font size title.
1145         optionsFontSizeMenuItem.setTitle(getString(R.string.font_size) + " - " + fontSize + "%");
1146
1147         // Run all the other default commands.
1148         super.onPrepareOptionsMenu(menu);
1149
1150         // Display the menu.
1151         return true;
1152     }
1153
1154     @Override
1155     public boolean onOptionsItemSelected(MenuItem menuItem) {
1156         // Get a handle for the shared preferences.
1157         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
1158
1159         // Get a handle for the cookie manager.
1160         CookieManager cookieManager = CookieManager.getInstance();
1161
1162         // Get the selected menu item ID.
1163         int menuItemId = menuItem.getItemId();
1164
1165         // Run the commands that correlate to the selected menu item.
1166         if (menuItemId == R.id.javascript) {  // JavaScript.
1167             // Toggle the JavaScript status.
1168             currentWebView.getSettings().setJavaScriptEnabled(!currentWebView.getSettings().getJavaScriptEnabled());
1169
1170             // Update the privacy icon.
1171             updatePrivacyIcons(true);
1172
1173             // Display a `Snackbar`.
1174             if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScrip is enabled.
1175                 Snackbar.make(webViewPager, R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
1176             } else if (cookieManager.acceptCookie()) {  // JavaScript is disabled, but first-party cookies are enabled.
1177                 Snackbar.make(webViewPager, R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
1178             } else {  // Privacy mode.
1179                 Snackbar.make(webViewPager, R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
1180             }
1181
1182             // Reload the current WebView.
1183             currentWebView.reload();
1184
1185             // Consume the event.
1186             return true;
1187         } else if (menuItemId == R.id.refresh) {  // Refresh.
1188             // Run the command that correlates to the current status of the menu item.
1189             if (menuItem.getTitle().equals(getString(R.string.refresh))) {  // The refresh button was pushed.
1190                 // Reload the current WebView.
1191                 currentWebView.reload();
1192             } else {  // The stop button was pushed.
1193                 // Stop the loading of the WebView.
1194                 currentWebView.stopLoading();
1195             }
1196
1197             // Consume the event.
1198             return true;
1199         } else if (menuItemId == R.id.bookmarks) {  // Bookmarks.
1200             // Open the bookmarks drawer.
1201             drawerLayout.openDrawer(GravityCompat.END);
1202
1203             // Consume the event.
1204             return true;
1205         } else if (menuItemId == R.id.cookies) {  // Cookies.
1206             // Switch the first-party cookie status.
1207             cookieManager.setAcceptCookie(!cookieManager.acceptCookie());
1208
1209             // Store the cookie status.
1210             currentWebView.setAcceptCookies(cookieManager.acceptCookie());
1211
1212             // Update the menu checkbox.
1213             menuItem.setChecked(cookieManager.acceptCookie());
1214
1215             // Update the privacy icon.
1216             updatePrivacyIcons(true);
1217
1218             // Display a snackbar.
1219             if (cookieManager.acceptCookie()) {  // Cookies are enabled.
1220                 Snackbar.make(webViewPager, R.string.cookies_enabled, Snackbar.LENGTH_SHORT).show();
1221             } else if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScript is still enabled.
1222                 Snackbar.make(webViewPager, R.string.cookies_disabled, Snackbar.LENGTH_SHORT).show();
1223             } else {  // Privacy mode.
1224                 Snackbar.make(webViewPager, R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
1225             }
1226
1227             // Reload the current WebView.
1228             currentWebView.reload();
1229
1230             // Consume the event.
1231             return true;
1232         } else if (menuItemId == R.id.dom_storage) {  // DOM storage.
1233             // Toggle the status of domStorageEnabled.
1234             currentWebView.getSettings().setDomStorageEnabled(!currentWebView.getSettings().getDomStorageEnabled());
1235
1236             // Update the menu checkbox.
1237             menuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
1238
1239             // Update the privacy icon.
1240             updatePrivacyIcons(true);
1241
1242             // Display a snackbar.
1243             if (currentWebView.getSettings().getDomStorageEnabled()) {
1244                 Snackbar.make(webViewPager, R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
1245             } else {
1246                 Snackbar.make(webViewPager, R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
1247             }
1248
1249             // Reload the current WebView.
1250             currentWebView.reload();
1251
1252             // Consume the event.
1253             return true;
1254         } else if (menuItemId == R.id.save_form_data) {  // Form data.  This can be removed once the minimum API >= 26.
1255             // Switch the status of saveFormDataEnabled.
1256             currentWebView.getSettings().setSaveFormData(!currentWebView.getSettings().getSaveFormData());
1257
1258             // Update the menu checkbox.
1259             menuItem.setChecked(currentWebView.getSettings().getSaveFormData());
1260
1261             // Display a snackbar.
1262             if (currentWebView.getSettings().getSaveFormData()) {
1263                 Snackbar.make(webViewPager, R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
1264             } else {
1265                 Snackbar.make(webViewPager, R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
1266             }
1267
1268             // Update the privacy icon.
1269             updatePrivacyIcons(true);
1270
1271             // Reload the current WebView.
1272             currentWebView.reload();
1273
1274             // Consume the event.
1275             return true;
1276         } else if (menuItemId == R.id.clear_cookies) {  // Clear cookies.
1277             // Create a snackbar.
1278             Snackbar.make(webViewPager, R.string.cookies_deleted, Snackbar.LENGTH_LONG)
1279                     .setAction(R.string.undo, v -> {
1280                         // Do nothing because everything will be handled by `onDismissed()` below.
1281                     })
1282                     .addCallback(new Snackbar.Callback() {
1283                         @Override
1284                         public void onDismissed(Snackbar snackbar, int event) {
1285                             if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
1286                                 // Delete the cookies, which command varies by SDK.
1287                                 if (Build.VERSION.SDK_INT < 21) {
1288                                     cookieManager.removeAllCookie();
1289                                 } else {
1290                                     cookieManager.removeAllCookies(null);
1291                                 }
1292                             }
1293                         }
1294                     })
1295                     .show();
1296
1297             // Consume the event.
1298             return true;
1299         } else if (menuItemId == R.id.clear_dom_storage) {  // Clear DOM storage.
1300             // Create a snackbar.
1301             Snackbar.make(webViewPager, R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
1302                     .setAction(R.string.undo, v -> {
1303                         // Do nothing because everything will be handled by `onDismissed()` below.
1304                     })
1305                     .addCallback(new Snackbar.Callback() {
1306                         @Override
1307                         public void onDismissed(Snackbar snackbar, int event) {
1308                             if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
1309                                 // Delete the DOM Storage.
1310                                 WebStorage webStorage = WebStorage.getInstance();
1311                                 webStorage.deleteAllData();
1312
1313                                 // Initialize a handler to manually delete the DOM storage files and directories.
1314                                 Handler deleteDomStorageHandler = new Handler();
1315
1316                                 // Setup a runnable to manually delete the DOM storage files and directories.
1317                                 Runnable deleteDomStorageRunnable = () -> {
1318                                     try {
1319                                         // Get a handle for the runtime.
1320                                         Runtime runtime = Runtime.getRuntime();
1321
1322                                         // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`,
1323                                         // which links to `/data/data/com.stoutner.privacybrowser.standard`.
1324                                         String privateDataDirectoryString = getApplicationInfo().dataDir;
1325
1326                                         // A string array must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
1327                                         Process deleteLocalStorageProcess = runtime.exec(new String[]{"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
1328
1329                                         // Multiple commands must be used because `Runtime.exec()` does not like `*`.
1330                                         Process deleteIndexProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
1331                                         Process deleteQuotaManagerProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
1332                                         Process deleteQuotaManagerJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
1333                                         Process deleteDatabasesProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
1334
1335                                         // Wait for the processes to finish.
1336                                         deleteLocalStorageProcess.waitFor();
1337                                         deleteIndexProcess.waitFor();
1338                                         deleteQuotaManagerProcess.waitFor();
1339                                         deleteQuotaManagerJournalProcess.waitFor();
1340                                         deleteDatabasesProcess.waitFor();
1341                                     } catch (Exception exception) {
1342                                         // Do nothing if an error is thrown.
1343                                     }
1344                                 };
1345
1346                                 // Manually delete the DOM storage files after 200 milliseconds.
1347                                 deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
1348                             }
1349                         }
1350                     })
1351                     .show();
1352
1353             // Consume the event.
1354             return true;
1355         } else if (menuItemId == R.id.clear_form_data) {  // Clear form data.  This can be remove once the minimum API >= 26.
1356             // Create a snackbar.
1357             Snackbar.make(webViewPager, R.string.form_data_deleted, Snackbar.LENGTH_LONG)
1358                     .setAction(R.string.undo, v -> {
1359                         // Do nothing because everything will be handled by `onDismissed()` below.
1360                     })
1361                     .addCallback(new Snackbar.Callback() {
1362                         @Override
1363                         public void onDismissed(Snackbar snackbar, int event) {
1364                             if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
1365                                 // Get a handle for the webView database.
1366                                 WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
1367
1368                                 // Delete the form data.
1369                                 webViewDatabase.clearFormData();
1370                             }
1371                         }
1372                     })
1373                     .show();
1374
1375             // Consume the event.
1376             return true;
1377         } else if (menuItemId == R.id.easylist) {  // EasyList.
1378             // Toggle the EasyList status.
1379             currentWebView.enableBlocklist(NestedScrollWebView.EASYLIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
1380
1381             // Update the menu checkbox.
1382             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
1383
1384             // Reload the current WebView.
1385             currentWebView.reload();
1386
1387             // Consume the event.
1388             return true;
1389         } else if (menuItemId == R.id.easyprivacy) {  // EasyPrivacy.
1390             // Toggle the EasyPrivacy status.
1391             currentWebView.enableBlocklist(NestedScrollWebView.EASYPRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
1392
1393             // Update the menu checkbox.
1394             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
1395
1396             // Reload the current WebView.
1397             currentWebView.reload();
1398
1399             // Consume the event.
1400             return true;
1401         } else if (menuItemId == R.id.fanboys_annoyance_list) {  // Fanboy's Annoyance List.
1402             // Toggle Fanboy's Annoyance List status.
1403             currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
1404
1405             // Update the menu checkbox.
1406             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
1407
1408             // Update the status of Fanboy's Social Blocking List.
1409             optionsFanboysSocialBlockingListMenuItem.setEnabled(!currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
1410
1411             // Reload the current WebView.
1412             currentWebView.reload();
1413
1414             // Consume the event.
1415             return true;
1416         } else if (menuItemId == R.id.fanboys_social_blocking_list) {  // Fanboy's Social Blocking List.
1417             // Toggle Fanboy's Social Blocking List status.
1418             currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
1419
1420             // Update the menu checkbox.
1421             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
1422
1423             // Reload the current WebView.
1424             currentWebView.reload();
1425
1426             // Consume the event.
1427             return true;
1428         } else if (menuItemId == R.id.ultralist) {  // UltraList.
1429             // Toggle the UltraList status.
1430             currentWebView.enableBlocklist(NestedScrollWebView.ULTRALIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
1431
1432             // Update the menu checkbox.
1433             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
1434
1435             // Reload the current WebView.
1436             currentWebView.reload();
1437
1438             // Consume the event.
1439             return true;
1440         } else if (menuItemId == R.id.ultraprivacy) {  // UltraPrivacy.
1441             // Toggle the UltraPrivacy status.
1442             currentWebView.enableBlocklist(NestedScrollWebView.ULTRAPRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
1443
1444             // Update the menu checkbox.
1445             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
1446
1447             // Reload the current WebView.
1448             currentWebView.reload();
1449
1450             // Consume the event.
1451             return true;
1452         } else if (menuItemId == R.id.block_all_third_party_requests) {  // Block all third-party requests.
1453             //Toggle the third-party requests blocker status.
1454             currentWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS, !currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
1455
1456             // Update the menu checkbox.
1457             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
1458
1459             // Reload the current WebView.
1460             currentWebView.reload();
1461
1462             // Consume the event.
1463             return true;
1464         } else if (menuItemId == R.id.proxy_none) {  // Proxy - None.
1465             // Update the proxy mode.
1466             proxyMode = ProxyHelper.NONE;
1467
1468             // Apply the proxy mode.
1469             applyProxy(true);
1470
1471             // Consume the event.
1472             return true;
1473         } else if (menuItemId == R.id.proxy_tor) {  // Proxy - Tor.
1474             // Update the proxy mode.
1475             proxyMode = ProxyHelper.TOR;
1476
1477             // Apply the proxy mode.
1478             applyProxy(true);
1479
1480             // Consume the event.
1481             return true;
1482         } else if (menuItemId == R.id.proxy_i2p) {  // Proxy - I2P.
1483             // Update the proxy mode.
1484             proxyMode = ProxyHelper.I2P;
1485
1486             // Apply the proxy mode.
1487             applyProxy(true);
1488
1489             // Consume the event.
1490             return true;
1491         } else if (menuItemId == R.id.proxy_custom) {  // Proxy - Custom.
1492             // Update the proxy mode.
1493             proxyMode = ProxyHelper.CUSTOM;
1494
1495             // Apply the proxy mode.
1496             applyProxy(true);
1497
1498             // Consume the event.
1499             return true;
1500         } else if (menuItemId == R.id.user_agent_privacy_browser) {  // User Agent - Privacy Browser.
1501             // Update the user agent.
1502             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
1503
1504             // Reload the current WebView.
1505             currentWebView.reload();
1506
1507             // Consume the event.
1508             return true;
1509         } else if (menuItemId == R.id.user_agent_webview_default) {  // User Agent - WebView Default.
1510             // Update the user agent.
1511             currentWebView.getSettings().setUserAgentString("");
1512
1513             // Reload the current WebView.
1514             currentWebView.reload();
1515
1516             // Consume the event.
1517             return true;
1518         } else if (menuItemId == R.id.user_agent_firefox_on_android) {  // User Agent - Firefox on Android.
1519             // Update the user agent.
1520             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
1521
1522             // Reload the current WebView.
1523             currentWebView.reload();
1524
1525             // Consume the event.
1526             return true;
1527         } else if (menuItemId == R.id.user_agent_chrome_on_android) {  // User Agent - Chrome on Android.
1528             // Update the user agent.
1529             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);
1530
1531             // Reload the current WebView.
1532             currentWebView.reload();
1533
1534             // Consume the event.
1535             return true;
1536         } else if (menuItemId == R.id.user_agent_safari_on_ios) {  // User Agent - Safari on iOS.
1537             // Update the user agent.
1538             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
1539
1540             // Reload the current WebView.
1541             currentWebView.reload();
1542
1543             // Consume the event.
1544             return true;
1545         } else if (menuItemId == R.id.user_agent_firefox_on_linux) {  // User Agent - Firefox on Linux.
1546             // Update the user agent.
1547             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
1548
1549             // Reload the current WebView.
1550             currentWebView.reload();
1551
1552             // Consume the event.
1553             return true;
1554         } else if (menuItemId == R.id.user_agent_chromium_on_linux) {  // User Agent - Chromium on Linux.
1555             // Update the user agent.
1556             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
1557
1558             // Reload the current WebView.
1559             currentWebView.reload();
1560
1561             // Consume the event.
1562             return true;
1563         } else if (menuItemId == R.id.user_agent_firefox_on_windows) {  // User Agent - Firefox on Windows.
1564             // Update the user agent.
1565             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
1566
1567             // Reload the current WebView.
1568             currentWebView.reload();
1569
1570             // Consume the event.
1571             return true;
1572         } else if (menuItemId == R.id.user_agent_chrome_on_windows) {  // User Agent - Chrome on Windows.
1573             // Update the user agent.
1574             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
1575
1576             // Reload the current WebView.
1577             currentWebView.reload();
1578
1579             // Consume the event.
1580             return true;
1581         } else if (menuItemId == R.id.user_agent_edge_on_windows) {  // User Agent - Edge on Windows.
1582             // Update the user agent.
1583             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
1584
1585             // Reload the current WebView.
1586             currentWebView.reload();
1587
1588             // Consume the event.
1589             return true;
1590         } else if (menuItemId == R.id.user_agent_internet_explorer_on_windows) {  // User Agent - Internet Explorer on Windows.
1591             // Update the user agent.
1592             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
1593
1594             // Reload the current WebView.
1595             currentWebView.reload();
1596
1597             // Consume the event.
1598             return true;
1599         } else if (menuItemId == R.id.user_agent_safari_on_macos) {  // User Agent - Safari on macOS.
1600             // Update the user agent.
1601             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
1602
1603             // Reload the current WebView.
1604             currentWebView.reload();
1605
1606             // Consume the event.
1607             return true;
1608         } else if (menuItemId == R.id.user_agent_custom) {  // User Agent - Custom.
1609             // Update the user agent.
1610             currentWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
1611
1612             // Reload the current WebView.
1613             currentWebView.reload();
1614
1615             // Consume the event.
1616             return true;
1617         } else if (menuItemId == R.id.font_size) {  // Font size.
1618             // Instantiate the font size dialog.
1619             DialogFragment fontSizeDialogFragment = FontSizeDialog.displayDialog(currentWebView.getSettings().getTextZoom());
1620
1621             // Show the font size dialog.
1622             fontSizeDialogFragment.show(getSupportFragmentManager(), getString(R.string.font_size));
1623
1624             // Consume the event.
1625             return true;
1626         } else if (menuItemId == R.id.swipe_to_refresh) {  // Swipe to refresh.
1627             // Toggle the stored status of swipe to refresh.
1628             currentWebView.setSwipeToRefresh(!currentWebView.getSwipeToRefresh());
1629
1630             // Update the swipe refresh layout.
1631             if (currentWebView.getSwipeToRefresh()) {  // Swipe to refresh is enabled.
1632                 // Only enable the swipe refresh layout if the WebView is scrolled to the top.  It is updated every time the scroll changes.
1633                 swipeRefreshLayout.setEnabled(currentWebView.getScrollY() == 0);
1634             } else {  // Swipe to refresh is disabled.
1635                 // Disable the swipe refresh layout.
1636                 swipeRefreshLayout.setEnabled(false);
1637             }
1638
1639             // Consume the event.
1640             return true;
1641         } else if (menuItemId == R.id.wide_viewport) {  // Wide viewport.
1642             // Toggle the viewport.
1643             currentWebView.getSettings().setUseWideViewPort(!currentWebView.getSettings().getUseWideViewPort());
1644
1645             // Consume the event.
1646             return true;
1647         } else if (menuItemId == R.id.display_images) {  // Display images.
1648             // Toggle the displaying of images.
1649             if (currentWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
1650                 // Disable loading of images.
1651                 currentWebView.getSettings().setLoadsImagesAutomatically(false);
1652
1653                 // Reload the website to remove existing images.
1654                 currentWebView.reload();
1655             } else {  // Images are not currently loaded automatically.
1656                 // Enable loading of images.  Missing images will be loaded without the need for a reload.
1657                 currentWebView.getSettings().setLoadsImagesAutomatically(true);
1658             }
1659
1660             // Consume the event.
1661             return true;
1662         } else if (menuItemId == R.id.dark_webview) {  // Dark WebView.
1663             // Check to see if dark WebView is supported by this WebView.
1664             if (WebViewFeature.isFeatureSupported(WebViewFeature.FORCE_DARK)) {
1665                 // Toggle the dark WebView setting.
1666                 if (WebSettingsCompat.getForceDark(currentWebView.getSettings()) == WebSettingsCompat.FORCE_DARK_ON) {  // Dark WebView is currently enabled.
1667                     // Turn off dark WebView.
1668                     WebSettingsCompat.setForceDark(currentWebView.getSettings(), WebSettingsCompat.FORCE_DARK_OFF);
1669                 } else {  // Dark WebView is currently disabled.
1670                     // Turn on dark WebView.
1671                     WebSettingsCompat.setForceDark(currentWebView.getSettings(), WebSettingsCompat.FORCE_DARK_ON);
1672                 }
1673             }
1674
1675             // Consume the event.
1676             return true;
1677         } else if (menuItemId == R.id.find_on_page) {  // Find on page.
1678             // Get a handle for the views.
1679             Toolbar toolbar = findViewById(R.id.toolbar);
1680             LinearLayout findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
1681             EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
1682
1683             // Set the minimum height of the find on page linear layout to match the toolbar.
1684             findOnPageLinearLayout.setMinimumHeight(toolbar.getHeight());
1685
1686             // Hide the toolbar.
1687             toolbar.setVisibility(View.GONE);
1688
1689             // Show the find on page linear layout.
1690             findOnPageLinearLayout.setVisibility(View.VISIBLE);
1691
1692             // Display the keyboard.  The app must wait 200 ms before running the command to work around a bug in Android.
1693             // http://stackoverflow.com/questions/5520085/android-show-softkeyboard-with-showsoftinput-is-not-working
1694             findOnPageEditText.postDelayed(() -> {
1695                 // Set the focus on the find on page edit text.
1696                 findOnPageEditText.requestFocus();
1697
1698                 // Get a handle for the input method manager.
1699                 InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
1700
1701                 // Remove the lint warning below that the input method manager might be null.
1702                 assert inputMethodManager != null;
1703
1704                 // Display the keyboard.  `0` sets no input flags.
1705                 inputMethodManager.showSoftInput(findOnPageEditText, 0);
1706             }, 200);
1707
1708             // Consume the event.
1709             return true;
1710         } else if (menuItemId == R.id.print) {  // Print.
1711             // Get a print manager instance.
1712             PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
1713
1714             // Remove the lint error below that print manager might be null.
1715             assert printManager != null;
1716
1717             // Create a print document adapter from the current WebView.
1718             PrintDocumentAdapter printDocumentAdapter = currentWebView.createPrintDocumentAdapter();
1719
1720             // Print the document.
1721             printManager.print(getString(R.string.privacy_browser_webpage), printDocumentAdapter, null);
1722
1723             // Consume the event.
1724             return true;
1725         } else if (menuItemId == R.id.save_url) {  // Save URL.
1726             // Check the download preference.
1727             if (downloadWithExternalApp) {  // Download with an external app.
1728                 downloadUrlWithExternalApp(currentWebView.getCurrentUrl());
1729             } else {  // Handle the download inside of Privacy Browser.
1730                 // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
1731                 new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
1732                         currentWebView.getAcceptCookies()).execute(currentWebView.getCurrentUrl());
1733             }
1734
1735             // Consume the event.
1736             return true;
1737         } else if (menuItemId == R.id.save_archive) {
1738             // Instantiate the save dialog.
1739             DialogFragment saveArchiveFragment = SaveWebpageDialog.saveWebpage(SaveWebpageDialog.SAVE_ARCHIVE, currentWebView.getCurrentUrl(), null, null, null,
1740                     false);
1741
1742             // Show the save dialog.  It must be named `save_dialog` so that the file picker can update the file name.
1743             saveArchiveFragment.show(getSupportFragmentManager(), getString(R.string.save_dialog));
1744
1745             return true;
1746         } else if (menuItemId == R.id.save_image) {  // Save image.
1747             // Instantiate the save dialog.
1748             DialogFragment saveImageFragment = SaveWebpageDialog.saveWebpage(SaveWebpageDialog.SAVE_IMAGE, currentWebView.getCurrentUrl(), null, null, null,
1749                     false);
1750
1751             // Show the save dialog.  It must be named `save_dialog` so that the file picker can update the file name.
1752             saveImageFragment.show(getSupportFragmentManager(), getString(R.string.save_dialog));
1753
1754             // Consume the event.
1755             return true;
1756         } else if (menuItemId == R.id.add_to_homescreen) {  // Add to homescreen.
1757             // Instantiate the create home screen shortcut dialog.
1758             DialogFragment createHomeScreenShortcutDialogFragment = CreateHomeScreenShortcutDialog.createDialog(currentWebView.getTitle(), currentWebView.getUrl(),
1759                     currentWebView.getFavoriteOrDefaultIcon());
1760
1761             // Show the create home screen shortcut dialog.
1762             createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
1763
1764             // Consume the event.
1765             return true;
1766         } else if (menuItemId == R.id.view_source) {  // View source.
1767             // Create an intent to launch the view source activity.
1768             Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
1769
1770             // Add the variables to the intent.
1771             viewSourceIntent.putExtra(ViewSourceActivityKt.CURRENT_URL, currentWebView.getUrl());
1772             viewSourceIntent.putExtra(ViewSourceActivityKt.USER_AGENT, currentWebView.getSettings().getUserAgentString());
1773
1774             // Make it so.
1775             startActivity(viewSourceIntent);
1776
1777             // Consume the event.
1778             return true;
1779         } else if (menuItemId == R.id.share_url) {  // Share URL.
1780             // Setup the share string.
1781             String shareString = currentWebView.getTitle() + " – " + currentWebView.getUrl();
1782
1783             // Create the share intent.
1784             Intent shareIntent = new Intent(Intent.ACTION_SEND);
1785
1786             // Add the share string to the intent.
1787             shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
1788
1789             // Set the MIME type.
1790             shareIntent.setType("text/plain");
1791
1792             // Set the intent to open in a new task.
1793             shareIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1794
1795             // Make it so.
1796             startActivity(Intent.createChooser(shareIntent, getString(R.string.share_url)));
1797
1798             // Consume the event.
1799             return true;
1800         } else if (menuItemId == R.id.open_with_app) {  // Open with app.
1801             // Open the URL with an outside app.
1802             openWithApp(currentWebView.getUrl());
1803
1804             // Consume the event.
1805             return true;
1806         } else if (menuItemId == R.id.open_with_browser) {  // Open with browser.
1807             // Open the URL with an outside browser.
1808             openWithBrowser(currentWebView.getUrl());
1809
1810             // Consume the event.
1811             return true;
1812         } else if (menuItemId == R.id.add_or_edit_domain) {  // Add or edit domain.
1813             // Check if domain settings currently exist.
1814             if (currentWebView.getDomainSettingsApplied()) {  // Edit the current domain settings.
1815                 // Reapply the domain settings on returning to `MainWebViewActivity`.
1816                 reapplyDomainSettingsOnRestart = true;
1817
1818                 // Create an intent to launch the domains activity.
1819                 Intent domainsIntent = new Intent(this, DomainsActivity.class);
1820
1821                 // Add the extra information to the intent.
1822                 domainsIntent.putExtra("load_domain", currentWebView.getDomainSettingsDatabaseId());
1823                 domainsIntent.putExtra("close_on_back", true);
1824                 domainsIntent.putExtra("current_url", currentWebView.getUrl());
1825
1826                 // Get the current certificate.
1827                 SslCertificate sslCertificate = currentWebView.getCertificate();
1828
1829                 // Check to see if the SSL certificate is populated.
1830                 if (sslCertificate != null) {
1831                     // Extract the certificate to strings.
1832                     String issuedToCName = sslCertificate.getIssuedTo().getCName();
1833                     String issuedToOName = sslCertificate.getIssuedTo().getOName();
1834                     String issuedToUName = sslCertificate.getIssuedTo().getUName();
1835                     String issuedByCName = sslCertificate.getIssuedBy().getCName();
1836                     String issuedByOName = sslCertificate.getIssuedBy().getOName();
1837                     String issuedByUName = sslCertificate.getIssuedBy().getUName();
1838                     long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
1839                     long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
1840
1841                     // Add the certificate to the intent.
1842                     domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
1843                     domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
1844                     domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
1845                     domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
1846                     domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
1847                     domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
1848                     domainsIntent.putExtra("ssl_start_date", startDateLong);
1849                     domainsIntent.putExtra("ssl_end_date", endDateLong);
1850                 }
1851
1852                 // Check to see if the current IP addresses have been received.
1853                 if (currentWebView.hasCurrentIpAddresses()) {
1854                     // Add the current IP addresses to the intent.
1855                     domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
1856                 }
1857
1858                 // Make it so.
1859                 startActivity(domainsIntent);
1860             } else {  // Add a new domain.
1861                 // Apply the new domain settings on returning to `MainWebViewActivity`.
1862                 reapplyDomainSettingsOnRestart = true;
1863
1864                 // Get the current domain
1865                 Uri currentUri = Uri.parse(currentWebView.getUrl());
1866                 String currentDomain = currentUri.getHost();
1867
1868                 // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
1869                 DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
1870
1871                 // Create the domain and store the database ID.
1872                 int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
1873
1874                 // Create an intent to launch the domains activity.
1875                 Intent domainsIntent = new Intent(this, DomainsActivity.class);
1876
1877                 // Add the extra information to the intent.
1878                 domainsIntent.putExtra("load_domain", newDomainDatabaseId);
1879                 domainsIntent.putExtra("close_on_back", true);
1880                 domainsIntent.putExtra("current_url", currentWebView.getUrl());
1881
1882                 // Get the current certificate.
1883                 SslCertificate sslCertificate = currentWebView.getCertificate();
1884
1885                 // Check to see if the SSL certificate is populated.
1886                 if (sslCertificate != null) {
1887                     // Extract the certificate to strings.
1888                     String issuedToCName = sslCertificate.getIssuedTo().getCName();
1889                     String issuedToOName = sslCertificate.getIssuedTo().getOName();
1890                     String issuedToUName = sslCertificate.getIssuedTo().getUName();
1891                     String issuedByCName = sslCertificate.getIssuedBy().getCName();
1892                     String issuedByOName = sslCertificate.getIssuedBy().getOName();
1893                     String issuedByUName = sslCertificate.getIssuedBy().getUName();
1894                     long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
1895                     long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
1896
1897                     // Add the certificate to the intent.
1898                     domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
1899                     domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
1900                     domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
1901                     domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
1902                     domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
1903                     domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
1904                     domainsIntent.putExtra("ssl_start_date", startDateLong);
1905                     domainsIntent.putExtra("ssl_end_date", endDateLong);
1906                 }
1907
1908                 // Check to see if the current IP addresses have been received.
1909                 if (currentWebView.hasCurrentIpAddresses()) {
1910                     // Add the current IP addresses to the intent.
1911                     domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
1912                 }
1913
1914                 // Make it so.
1915                 startActivity(domainsIntent);
1916             }
1917
1918             // Consume the event.
1919             return true;
1920         } else if (menuItemId == R.id.ad_consent) {  // Ad consent.
1921             // Instantiate the ad consent dialog.
1922             DialogFragment adConsentDialogFragment = new AdConsentDialog();
1923
1924             // Display the ad consent dialog.
1925             adConsentDialogFragment.show(getSupportFragmentManager(), getString(R.string.ad_consent));
1926
1927             // Consume the event.
1928             return true;
1929         } else {  // There is no match with the options menu.  Pass the event up to the parent method.
1930             // Don't consume the event.
1931             return super.onOptionsItemSelected(menuItem);
1932         }
1933     }
1934
1935     // removeAllCookies is deprecated, but it is required for API < 21.
1936     @Override
1937     public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
1938         // Get a handle for the shared preferences.
1939         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
1940
1941         // Get the menu item ID.
1942         int menuItemId = menuItem.getItemId();
1943
1944         // Run the commands that correspond to the selected menu item.
1945         if (menuItemId == R.id.clear_and_exit) {  // Clear and exit.
1946             // Clear and exit Privacy Browser.
1947             clearAndExit();
1948         } else if (menuItemId == R.id.home) {  // Home.
1949             // Load the homepage.
1950             loadUrl(currentWebView, sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
1951         } else if (menuItemId == R.id.back) {  // Back.
1952             // Check if the WebView can go back.
1953             if (currentWebView.canGoBack()) {
1954                 // Get the current web back forward list.
1955                 WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
1956
1957                 // Get the previous entry URL.
1958                 String previousUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() - 1).getUrl();
1959
1960                 // Apply the domain settings.
1961                 applyDomainSettings(currentWebView, previousUrl, false, false, false);
1962
1963                 // Load the previous website in the history.
1964                 currentWebView.goBack();
1965             }
1966         } else if (menuItemId == R.id.forward) {  // Forward.
1967             // Check if the WebView can go forward.
1968             if (currentWebView.canGoForward()) {
1969                 // Get the current web back forward list.
1970                 WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
1971
1972                 // Get the next entry URL.
1973                 String nextUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() + 1).getUrl();
1974
1975                 // Apply the domain settings.
1976                 applyDomainSettings(currentWebView, nextUrl, false, false, false);
1977
1978                 // Load the next website in the history.
1979                 currentWebView.goForward();
1980             }
1981         } else if (menuItemId == R.id.history) {  // History.
1982             // Instantiate the URL history dialog.
1983             DialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(currentWebView.getWebViewFragmentId());
1984
1985             // Show the URL history dialog.
1986             urlHistoryDialogFragment.show(getSupportFragmentManager(), getString(R.string.history));
1987         } else if (menuItemId == R.id.open) {  // Open.
1988             // Instantiate the open file dialog.
1989             DialogFragment openDialogFragment = new OpenDialog();
1990
1991             // Show the open file dialog.
1992             openDialogFragment.show(getSupportFragmentManager(), getString(R.string.open));
1993         } else if (menuItemId == R.id.requests) {  // Requests.
1994             // Populate the resource requests.
1995             RequestsActivity.resourceRequests = currentWebView.getResourceRequests();
1996
1997             // Create an intent to launch the Requests activity.
1998             Intent requestsIntent = new Intent(this, RequestsActivity.class);
1999
2000             // Add the block third-party requests status to the intent.
2001             requestsIntent.putExtra("block_all_third_party_requests", currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
2002
2003             // Make it so.
2004             startActivity(requestsIntent);
2005         } else if (menuItemId == R.id.downloads) {  // Downloads.
2006             // Try the default system download manager.
2007             try {
2008                 // Launch the default system Download Manager.
2009                 Intent defaultDownloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
2010
2011                 // Launch as a new task so that the download manager and Privacy Browser show as separate windows in the recent tasks list.
2012                 defaultDownloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
2013
2014                 // Make it so.
2015                 startActivity(defaultDownloadManagerIntent);
2016             } catch (Exception defaultDownloadManagerException) {
2017                 // Try a generic file manager.
2018                 try {
2019                     // Create a generic file manager intent.
2020                     Intent genericFileManagerIntent = new Intent(Intent.ACTION_VIEW);
2021
2022                     // Open the download directory.
2023                     genericFileManagerIntent.setDataAndType(Uri.parse(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).toString()), DocumentsContract.Document.MIME_TYPE_DIR);
2024
2025                     // Launch as a new task so that the file manager and Privacy Browser show as separate windows in the recent tasks list.
2026                     genericFileManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
2027
2028                     // Make it so.
2029                     startActivity(genericFileManagerIntent);
2030                 } catch (Exception genericFileManagerException) {
2031                     // Try an alternate file manager.
2032                     try {
2033                         // Create an alternate file manager intent.
2034                         Intent alternateFileManagerIntent = new Intent(Intent.ACTION_VIEW);
2035
2036                         // Open the download directory.
2037                         alternateFileManagerIntent.setDataAndType(Uri.parse(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).toString()), "resource/folder");
2038
2039                         // Launch as a new task so that the file manager and Privacy Browser show as separate windows in the recent tasks list.
2040                         alternateFileManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
2041
2042                         // Open the alternate file manager.
2043                         startActivity(alternateFileManagerIntent);
2044                     } catch (Exception alternateFileManagerException) {
2045                         // Display a snackbar.
2046                         Snackbar.make(currentWebView, R.string.no_file_manager_detected, Snackbar.LENGTH_INDEFINITE).show();
2047                     }
2048                 }
2049             }
2050         } else if (menuItemId == R.id.domains) {  // Domains.
2051             // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
2052             reapplyDomainSettingsOnRestart = true;
2053
2054             // Launch the domains activity.
2055             Intent domainsIntent = new Intent(this, DomainsActivity.class);
2056
2057             // Add the extra information to the intent.
2058             domainsIntent.putExtra("current_url", currentWebView.getUrl());
2059
2060             // Get the current certificate.
2061             SslCertificate sslCertificate = currentWebView.getCertificate();
2062
2063             // Check to see if the SSL certificate is populated.
2064             if (sslCertificate != null) {
2065                 // Extract the certificate to strings.
2066                 String issuedToCName = sslCertificate.getIssuedTo().getCName();
2067                 String issuedToOName = sslCertificate.getIssuedTo().getOName();
2068                 String issuedToUName = sslCertificate.getIssuedTo().getUName();
2069                 String issuedByCName = sslCertificate.getIssuedBy().getCName();
2070                 String issuedByOName = sslCertificate.getIssuedBy().getOName();
2071                 String issuedByUName = sslCertificate.getIssuedBy().getUName();
2072                 long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
2073                 long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
2074
2075                 // Add the certificate to the intent.
2076                 domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
2077                 domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
2078                 domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
2079                 domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
2080                 domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
2081                 domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
2082                 domainsIntent.putExtra("ssl_start_date", startDateLong);
2083                 domainsIntent.putExtra("ssl_end_date", endDateLong);
2084             }
2085
2086             // Check to see if the current IP addresses have been received.
2087             if (currentWebView.hasCurrentIpAddresses()) {
2088                 // Add the current IP addresses to the intent.
2089                 domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
2090             }
2091
2092             // Make it so.
2093             startActivity(domainsIntent);
2094         } else if (menuItemId == R.id.settings) {  // Settings.
2095             // Set the flag to reapply app settings on restart when returning from Settings.
2096             reapplyAppSettingsOnRestart = true;
2097
2098             // Set the flag to reapply the domain settings on restart when returning from Settings.
2099             reapplyDomainSettingsOnRestart = true;
2100
2101             // Launch the settings activity.
2102             Intent settingsIntent = new Intent(this, SettingsActivity.class);
2103             startActivity(settingsIntent);
2104         } else if (menuItemId == R.id.import_export) { // Import/Export.
2105             // Create an intent to launch the import/export activity.
2106             Intent importExportIntent = new Intent(this, ImportExportActivity.class);
2107
2108             // Make it so.
2109             startActivity(importExportIntent);
2110         } else if (menuItemId == R.id.logcat) {  // Logcat.
2111             // Create an intent to launch the logcat activity.
2112             Intent logcatIntent = new Intent(this, LogcatActivity.class);
2113
2114             // Make it so.
2115             startActivity(logcatIntent);
2116         } else if (menuItemId == R.id.guide) {  // Guide.
2117             // Create an intent to launch the guide activity.
2118             Intent guideIntent = new Intent(this, GuideActivity.class);
2119
2120             // Make it so.
2121             startActivity(guideIntent);
2122         } else if (menuItemId == R.id.about) {  // About
2123             // Create an intent to launch the about activity.
2124             Intent aboutIntent = new Intent(this, AboutActivity.class);
2125
2126             // Create a string array for the blocklist versions.
2127             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],
2128                     ultraList.get(0).get(0)[0], ultraPrivacy.get(0).get(0)[0]};
2129
2130             // Add the blocklist versions to the intent.
2131             aboutIntent.putExtra(AboutActivity.BLOCKLIST_VERSIONS, blocklistVersions);
2132
2133             // Make it so.
2134             startActivity(aboutIntent);
2135         }
2136
2137         // Close the navigation drawer.
2138         drawerLayout.closeDrawer(GravityCompat.START);
2139         return true;
2140     }
2141
2142     @Override
2143     public void onPostCreate(Bundle savedInstanceState) {
2144         // Run the default commands.
2145         super.onPostCreate(savedInstanceState);
2146
2147         // Sync the state of the DrawerToggle after the default `onRestoreInstanceState()` has finished.  This creates the navigation drawer icon.
2148         actionBarDrawerToggle.syncState();
2149     }
2150
2151     @Override
2152     public void onConfigurationChanged(@NonNull Configuration newConfig) {
2153         // Run the default commands.
2154         super.onConfigurationChanged(newConfig);
2155
2156         // Reload the ad for the free flavor if not in full screen mode.
2157         if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
2158             // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
2159             View adView = findViewById(R.id.adview);
2160
2161             // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
2162             // `getContext()` can be used instead of `getActivity.getApplicationContext()` once the minimum API >= 23.
2163             AdHelper.loadAd(adView, getApplicationContext(), this, getString(R.string.ad_unit_id));
2164         }
2165
2166         // `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:
2167         // https://code.google.com/p/android/issues/detail?id=20493#c8
2168         // ActivityCompat.invalidateOptionsMenu(this);
2169     }
2170
2171     @Override
2172     public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
2173         // Get the hit test result.
2174         final WebView.HitTestResult hitTestResult = currentWebView.getHitTestResult();
2175
2176         // Define the URL strings.
2177         final String imageUrl;
2178         final String linkUrl;
2179
2180         // Get handles for the system managers.
2181         final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
2182
2183         // Remove the lint errors below that the clipboard manager might be null.
2184         assert clipboardManager != null;
2185
2186         // Process the link according to the type.
2187         switch (hitTestResult.getType()) {
2188             // `SRC_ANCHOR_TYPE` is a link.
2189             case WebView.HitTestResult.SRC_ANCHOR_TYPE:
2190                 // Get the target URL.
2191                 linkUrl = hitTestResult.getExtra();
2192
2193                 // Set the target URL as the title of the `ContextMenu`.
2194                 menu.setHeaderTitle(linkUrl);
2195
2196                 // Add an Open in New Tab entry.
2197                 menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2198                     // Load the link URL in a new tab and move to it.
2199                     addNewTab(linkUrl, true);
2200
2201                     // Consume the event.
2202                     return true;
2203                 });
2204
2205                 // Add an Open in Background entry.
2206                 menu.add(R.string.open_in_background).setOnMenuItemClickListener((MenuItem item) -> {
2207                     // Load the link URL in a new tab but do not move to it.
2208                     addNewTab(linkUrl, false);
2209
2210                     // Consume the event.
2211                     return true;
2212                 });
2213
2214                 // Add an Open with App entry.
2215                 menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
2216                     openWithApp(linkUrl);
2217
2218                     // Consume the event.
2219                     return true;
2220                 });
2221
2222                 // Add an Open with Browser entry.
2223                 menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
2224                     openWithBrowser(linkUrl);
2225
2226                     // Consume the event.
2227                     return true;
2228                 });
2229
2230                 // Add a Copy URL entry.
2231                 menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
2232                     // Save the link URL in a `ClipData`.
2233                     ClipData srcAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), linkUrl);
2234
2235                     // Set the `ClipData` as the clipboard's primary clip.
2236                     clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
2237
2238                     // Consume the event.
2239                     return true;
2240                 });
2241
2242                 // Add a Save URL entry.
2243                 menu.add(R.string.save_url).setOnMenuItemClickListener((MenuItem item) -> {
2244                     // Check the download preference.
2245                     if (downloadWithExternalApp) {  // Download with an external app.
2246                         downloadUrlWithExternalApp(linkUrl);
2247                     } else {  // Handle the download inside of Privacy Browser.
2248                         // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
2249                         new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
2250                                 currentWebView.getAcceptCookies()).execute(linkUrl);
2251                     }
2252
2253                     // Consume the event.
2254                     return true;
2255                 });
2256
2257                 // Add an empty Cancel entry, which by default closes the context menu.
2258                 menu.add(R.string.cancel);
2259                 break;
2260
2261             // `IMAGE_TYPE` is an image.
2262             case WebView.HitTestResult.IMAGE_TYPE:
2263                 // Get the image URL.
2264                 imageUrl = hitTestResult.getExtra();
2265
2266                 // Remove the incorrect lint warning below that the image URL might be null.
2267                 assert imageUrl != null;
2268
2269                 // Set the context menu title.
2270                 if (imageUrl.startsWith("data:")) {  // The image data is contained in within the URL, making it exceedingly long.
2271                     // Truncate the image URL before making it the title.
2272                     menu.setHeaderTitle(imageUrl.substring(0, 100));
2273                 } else {  // The image URL does not contain the full image data.
2274                     // Set the image URL as the title of the context menu.
2275                     menu.setHeaderTitle(imageUrl);
2276                 }
2277
2278                 // Add an Open in New Tab entry.
2279                 menu.add(R.string.open_image_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2280                     // Load the image in a new tab.
2281                     addNewTab(imageUrl, true);
2282
2283                     // Consume the event.
2284                     return true;
2285                 });
2286
2287                 // Add an Open with App entry.
2288                 menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
2289                     // Open the image URL with an external app.
2290                     openWithApp(imageUrl);
2291
2292                     // Consume the event.
2293                     return true;
2294                 });
2295
2296                 // Add an Open with Browser entry.
2297                 menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
2298                     // Open the image URL with an external browser.
2299                     openWithBrowser(imageUrl);
2300
2301                     // Consume the event.
2302                     return true;
2303                 });
2304
2305                 // Add a View Image entry.
2306                 menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
2307                     // Load the image in the current tab.
2308                     loadUrl(currentWebView, imageUrl);
2309
2310                     // Consume the event.
2311                     return true;
2312                 });
2313
2314                 // Add a Save Image entry.
2315                 menu.add(R.string.save_image).setOnMenuItemClickListener((MenuItem item) -> {
2316                     // Check the download preference.
2317                     if (downloadWithExternalApp) {  // Download with an external app.
2318                         downloadUrlWithExternalApp(imageUrl);
2319                     } else {  // Handle the download inside of Privacy Browser.
2320                         // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
2321                         new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
2322                                 currentWebView.getAcceptCookies()).execute(imageUrl);
2323                     }
2324
2325                     // Consume the event.
2326                     return true;
2327                 });
2328
2329                 // Add a Copy URL entry.
2330                 menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
2331                     // Save the image URL in a clip data.
2332                     ClipData imageTypeClipData = ClipData.newPlainText(getString(R.string.url), imageUrl);
2333
2334                     // Set the clip data as the clipboard's primary clip.
2335                     clipboardManager.setPrimaryClip(imageTypeClipData);
2336
2337                     // Consume the event.
2338                     return true;
2339                 });
2340
2341                 // Add an empty Cancel entry, which by default closes the context menu.
2342                 menu.add(R.string.cancel);
2343                 break;
2344
2345             // `SRC_IMAGE_ANCHOR_TYPE` is an image that is also a link.
2346             case WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE:
2347                 // Get the image URL.
2348                 imageUrl = hitTestResult.getExtra();
2349
2350                 // Instantiate a handler.
2351                 Handler handler = new Handler();
2352
2353                 // Get a message from the handler.
2354                 Message message = handler.obtainMessage();
2355
2356                 // Request the image details from the last touched node be returned in the message.
2357                 currentWebView.requestFocusNodeHref(message);
2358
2359                 // Get the link URL from the message data.
2360                 linkUrl = message.getData().getString("url");
2361
2362                 // Set the link URL as the title of the context menu.
2363                 menu.setHeaderTitle(linkUrl);
2364
2365                 // Add an Open in New Tab entry.
2366                 menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2367                     // Load the link URL in a new tab and move to it.
2368                     addNewTab(linkUrl, true);
2369
2370                     // Consume the event.
2371                     return true;
2372                 });
2373
2374                 // Add an Open in Background entry.
2375                 menu.add(R.string.open_in_background).setOnMenuItemClickListener((MenuItem item) -> {
2376                     // Lod the link URL in a new tab but do not move to it.
2377                     addNewTab(linkUrl, false);
2378
2379                     // Consume the event.
2380                     return true;
2381                 });
2382
2383                 // Add an Open Image in New Tab entry.
2384                 menu.add(R.string.open_image_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2385                     // Load the image in a new tab and move to it.
2386                     addNewTab(imageUrl, true);
2387
2388                     // Consume the event.
2389                     return true;
2390                 });
2391
2392                 // Add an Open with App entry.
2393                 menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
2394                     // Open the link URL with an external app.
2395                     openWithApp(linkUrl);
2396
2397                     // Consume the event.
2398                     return true;
2399                 });
2400
2401                 // Add an Open with Browser entry.
2402                 menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
2403                     // Open the link URL with an external browser.
2404                     openWithBrowser(linkUrl);
2405
2406                     // Consume the event.
2407                     return true;
2408                 });
2409
2410                 // Add a View Image entry.
2411                 menu.add(R.string.view_image).setOnMenuItemClickListener((MenuItem item) -> {
2412                    // View the image in the current tab.
2413                    loadUrl(currentWebView, imageUrl);
2414
2415                    // Consume the event.
2416                    return true;
2417                 });
2418
2419                 // Add a Save Image entry.
2420                 menu.add(R.string.save_image).setOnMenuItemClickListener((MenuItem item) -> {
2421                     // Check the download preference.
2422                     if (downloadWithExternalApp) {  // Download with an external app.
2423                         downloadUrlWithExternalApp(imageUrl);
2424                     } else {  // Handle the download inside of Privacy Browser.
2425                         // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
2426                         new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
2427                                 currentWebView.getAcceptCookies()).execute(imageUrl);
2428                     }
2429
2430                     // Consume the event.
2431                     return true;
2432                 });
2433
2434                 // Add a Copy URL entry.
2435                 menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
2436                     // Save the link URL in a clip data.
2437                     ClipData srcImageAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), linkUrl);
2438
2439                     // Set the clip data as the clipboard's primary clip.
2440                     clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
2441
2442                     // Consume the event.
2443                     return true;
2444                 });
2445
2446                 // Add a Save URL entry.
2447                 menu.add(R.string.save_url).setOnMenuItemClickListener((MenuItem item) -> {
2448                     // Check the download preference.
2449                     if (downloadWithExternalApp) {  // Download with an external app.
2450                         downloadUrlWithExternalApp(linkUrl);
2451                     } else {  // Handle the download inside of Privacy Browser.
2452                         // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
2453                         new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
2454                                 currentWebView.getAcceptCookies()).execute(linkUrl);
2455                     }
2456
2457                     // Consume the event.
2458                     return true;
2459                 });
2460
2461                 // Add an empty Cancel entry, which by default closes the context menu.
2462                 menu.add(R.string.cancel);
2463                 break;
2464
2465             case WebView.HitTestResult.EMAIL_TYPE:
2466                 // Get the target URL.
2467                 linkUrl = hitTestResult.getExtra();
2468
2469                 // Set the target URL as the title of the `ContextMenu`.
2470                 menu.setHeaderTitle(linkUrl);
2471
2472                 // Add a Write Email entry.
2473                 menu.add(R.string.write_email).setOnMenuItemClickListener(item -> {
2474                     // Use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
2475                     Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
2476
2477                     // Parse the url and set it as the data for the `Intent`.
2478                     emailIntent.setData(Uri.parse("mailto:" + linkUrl));
2479
2480                     // `FLAG_ACTIVITY_NEW_TASK` opens the email program in a new task instead as part of Privacy Browser.
2481                     emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
2482
2483                     try {
2484                         // Make it so.
2485                         startActivity(emailIntent);
2486                     } catch (ActivityNotFoundException exception) {
2487                         // Display a snackbar.
2488                         Snackbar.make(currentWebView, getString(R.string.error) + "  " + exception, Snackbar.LENGTH_INDEFINITE).show();
2489                     }
2490
2491                     // Consume the event.
2492                     return true;
2493                 });
2494
2495                 // Add a Copy Email Address entry.
2496                 menu.add(R.string.copy_email_address).setOnMenuItemClickListener(item -> {
2497                     // Save the email address in a `ClipData`.
2498                     ClipData srcEmailTypeClipData = ClipData.newPlainText(getString(R.string.email_address), linkUrl);
2499
2500                     // Set the `ClipData` as the clipboard's primary clip.
2501                     clipboardManager.setPrimaryClip(srcEmailTypeClipData);
2502
2503                     // Consume the event.
2504                     return true;
2505                 });
2506
2507                 // Add an empty Cancel entry, which by default closes the context menu.
2508                 menu.add(R.string.cancel);
2509                 break;
2510         }
2511     }
2512
2513     @Override
2514     public void onCreateBookmark(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
2515         // Get a handle for the bookmarks list view.
2516         ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
2517
2518         // Get the dialog.
2519         Dialog dialog = dialogFragment.getDialog();
2520
2521         // Remove the incorrect lint warning below that the dialog might be null.
2522         assert dialog != null;
2523
2524         // Get the views from the dialog fragment.
2525         EditText createBookmarkNameEditText = dialog.findViewById(R.id.create_bookmark_name_edittext);
2526         EditText createBookmarkUrlEditText = dialog.findViewById(R.id.create_bookmark_url_edittext);
2527
2528         // Extract the strings from the edit texts.
2529         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
2530         String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
2531
2532         // Create a favorite icon byte array output stream.
2533         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
2534
2535         // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2536         favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
2537
2538         // Convert the favorite icon byte array stream to a byte array.
2539         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
2540
2541         // Display the new bookmark below the current items in the (0 indexed) list.
2542         int newBookmarkDisplayOrder = bookmarksListView.getCount();
2543
2544         // Create the bookmark.
2545         bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
2546
2547         // Update the bookmarks cursor with the current contents of this folder.
2548         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
2549
2550         // Update the list view.
2551         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
2552
2553         // Scroll to the new bookmark.
2554         bookmarksListView.setSelection(newBookmarkDisplayOrder);
2555     }
2556
2557     @Override
2558     public void onCreateBookmarkFolder(DialogFragment dialogFragment, @NonNull Bitmap favoriteIconBitmap) {
2559         // Get a handle for the bookmarks list view.
2560         ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
2561
2562         // Get the dialog.
2563         Dialog dialog = dialogFragment.getDialog();
2564
2565         // Remove the incorrect lint warning below that the dialog might be null.
2566         assert dialog != null;
2567
2568         // Get handles for the views in the dialog fragment.
2569         EditText folderNameEditText = dialog.findViewById(R.id.folder_name_edittext);
2570         RadioButton defaultIconRadioButton = dialog.findViewById(R.id.default_icon_radiobutton);
2571         ImageView defaultIconImageView = dialog.findViewById(R.id.default_icon_imageview);
2572
2573         // Get new folder name string.
2574         String folderNameString = folderNameEditText.getText().toString();
2575
2576         // Create a folder icon bitmap.
2577         Bitmap folderIconBitmap;
2578
2579         // Set the folder icon bitmap according to the dialog.
2580         if (defaultIconRadioButton.isChecked()) {  // Use the default folder icon.
2581             // Get the default folder icon drawable.
2582             Drawable folderIconDrawable = defaultIconImageView.getDrawable();
2583
2584             // Convert the folder icon drawable to a bitmap drawable.
2585             BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
2586
2587             // Convert the folder icon bitmap drawable to a bitmap.
2588             folderIconBitmap = folderIconBitmapDrawable.getBitmap();
2589         } else {  // Use the WebView favorite icon.
2590             // Copy the favorite icon bitmap to the folder icon bitmap.
2591             folderIconBitmap = favoriteIconBitmap;
2592         }
2593
2594         // Create a folder icon byte array output stream.
2595         ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
2596
2597         // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2598         folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
2599
2600         // Convert the folder icon byte array stream to a byte array.
2601         byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
2602
2603         // Move all the bookmarks down one in the display order.
2604         for (int i = 0; i < bookmarksListView.getCount(); i++) {
2605             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
2606             bookmarksDatabaseHelper.updateDisplayOrder(databaseId, i + 1);
2607         }
2608
2609         // Create the folder, which will be placed at the top of the `ListView`.
2610         bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
2611
2612         // Update the bookmarks cursor with the current contents of this folder.
2613         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
2614
2615         // Update the `ListView`.
2616         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
2617
2618         // Scroll to the new folder.
2619         bookmarksListView.setSelection(0);
2620     }
2621
2622     @Override
2623     public void onSaveBookmarkFolder(DialogFragment dialogFragment, int selectedFolderDatabaseId, @NonNull Bitmap favoriteIconBitmap) {
2624         // Remove the incorrect lint warning below that the dialog fragment might be null.
2625         assert dialogFragment != null;
2626
2627         // Get the dialog.
2628         Dialog dialog = dialogFragment.getDialog();
2629
2630         // Remove the incorrect lint warning below that the dialog might be null.
2631         assert dialog != null;
2632
2633         // Get handles for the views from the dialog.
2634         RadioButton currentFolderIconRadioButton = dialog.findViewById(R.id.current_icon_radiobutton);
2635         RadioButton defaultFolderIconRadioButton = dialog.findViewById(R.id.default_icon_radiobutton);
2636         ImageView defaultFolderIconImageView = dialog.findViewById(R.id.default_icon_imageview);
2637         EditText editFolderNameEditText = dialog.findViewById(R.id.folder_name_edittext);
2638
2639         // Get the new folder name.
2640         String newFolderNameString = editFolderNameEditText.getText().toString();
2641
2642         // Check if the favorite icon has changed.
2643         if (currentFolderIconRadioButton.isChecked()) {  // Only the name has changed.
2644             // Update the name in the database.
2645             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
2646         } else if (!currentFolderIconRadioButton.isChecked() && newFolderNameString.equals(oldFolderNameString)) {  // Only the icon has changed.
2647             // Create the new folder icon Bitmap.
2648             Bitmap folderIconBitmap;
2649
2650             // Populate the new folder icon bitmap.
2651             if (defaultFolderIconRadioButton.isChecked()) {
2652                 // Get the default folder icon drawable.
2653                 Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
2654
2655                 // Convert the folder icon drawable to a bitmap drawable.
2656                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
2657
2658                 // Convert the folder icon bitmap drawable to a bitmap.
2659                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
2660             } else {  // Use the `WebView` favorite icon.
2661                 // Copy the favorite icon bitmap to the folder icon bitmap.
2662                 folderIconBitmap = favoriteIconBitmap;
2663             }
2664
2665             // Create a folder icon byte array output stream.
2666             ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
2667
2668             // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2669             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
2670
2671             // Convert the folder icon byte array stream to a byte array.
2672             byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
2673
2674             // Update the folder icon in the database.
2675             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseI