Disable screen timeout while playing fullscreen videos. https://redmine.stoutner...
[PrivacyBrowser.git] / app / src / main / java / com / stoutner / privacybrowser / activities / MainWebViewActivity.java
1 /*
2  * Copyright © 2015-2019 Soren Stoutner <soren@stoutner.com>.
3  *
4  * Download cookie code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
5  *
6  * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
7  *
8  * Privacy Browser is free software: you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation, either version 3 of the License, or
11  * (at your option) any later version.
12  *
13  * Privacy Browser is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
20  */
21
22 package com.stoutner.privacybrowser.activities;
23
24 import android.Manifest;
25 import android.annotation.SuppressLint;
26 import android.app.Activity;
27 import android.app.Dialog;
28 import android.app.DownloadManager;
29 import android.app.SearchManager;
30 import android.content.ActivityNotFoundException;
31 import android.content.BroadcastReceiver;
32 import android.content.ClipData;
33 import android.content.ClipboardManager;
34 import android.content.Context;
35 import android.content.Intent;
36 import android.content.IntentFilter;
37 import android.content.SharedPreferences;
38 import android.content.pm.PackageManager;
39 import android.content.res.Configuration;
40 import android.database.Cursor;
41 import android.graphics.Bitmap;
42 import android.graphics.BitmapFactory;
43 import android.graphics.Typeface;
44 import android.graphics.drawable.BitmapDrawable;
45 import android.graphics.drawable.Drawable;
46 import android.net.Uri;
47 import android.net.http.SslCertificate;
48 import android.net.http.SslError;
49 import android.os.Build;
50 import android.os.Bundle;
51 import android.os.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.text.Editable;
58 import android.text.Spanned;
59 import android.text.TextWatcher;
60 import android.text.style.ForegroundColorSpan;
61 import android.util.Patterns;
62 import android.view.ContextMenu;
63 import android.view.GestureDetector;
64 import android.view.KeyEvent;
65 import android.view.Menu;
66 import android.view.MenuItem;
67 import android.view.MotionEvent;
68 import android.view.View;
69 import android.view.ViewGroup;
70 import android.view.WindowManager;
71 import android.view.inputmethod.InputMethodManager;
72 import android.webkit.CookieManager;
73 import android.webkit.HttpAuthHandler;
74 import android.webkit.SslErrorHandler;
75 import android.webkit.ValueCallback;
76 import android.webkit.WebBackForwardList;
77 import android.webkit.WebChromeClient;
78 import android.webkit.WebResourceResponse;
79 import android.webkit.WebSettings;
80 import android.webkit.WebStorage;
81 import android.webkit.WebView;
82 import android.webkit.WebViewClient;
83 import android.webkit.WebViewDatabase;
84 import android.widget.ArrayAdapter;
85 import android.widget.CursorAdapter;
86 import android.widget.EditText;
87 import android.widget.FrameLayout;
88 import android.widget.ImageView;
89 import android.widget.LinearLayout;
90 import android.widget.ListView;
91 import android.widget.ProgressBar;
92 import android.widget.RadioButton;
93 import android.widget.RelativeLayout;
94 import android.widget.TextView;
95
96 import androidx.annotation.NonNull;
97 import androidx.appcompat.app.ActionBar;
98 import androidx.appcompat.app.ActionBarDrawerToggle;
99 import androidx.appcompat.app.AppCompatActivity;
100 import androidx.appcompat.widget.Toolbar;
101 import androidx.coordinatorlayout.widget.CoordinatorLayout;
102 import androidx.core.app.ActivityCompat;
103 import androidx.core.content.ContextCompat;
104 import androidx.core.view.GravityCompat;
105 import androidx.drawerlayout.widget.DrawerLayout;
106 import androidx.fragment.app.DialogFragment;
107 import androidx.fragment.app.FragmentManager;
108 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
109 import androidx.viewpager.widget.ViewPager;
110
111 import com.google.android.material.appbar.AppBarLayout;
112 import com.google.android.material.floatingactionbutton.FloatingActionButton;
113 import com.google.android.material.navigation.NavigationView;
114 import com.google.android.material.snackbar.Snackbar;
115 import com.google.android.material.tabs.TabLayout;
116
117 import com.stoutner.privacybrowser.BuildConfig;
118 import com.stoutner.privacybrowser.R;
119 import com.stoutner.privacybrowser.adapters.WebViewPagerAdapter;
120 import com.stoutner.privacybrowser.asynctasks.GetHostIpAddresses;
121 import com.stoutner.privacybrowser.asynctasks.PopulateBlocklists;
122 import com.stoutner.privacybrowser.asynctasks.SaveWebpageImage;
123 import com.stoutner.privacybrowser.dialogs.AdConsentDialog;
124 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
125 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
126 import com.stoutner.privacybrowser.dialogs.CreateHomeScreenShortcutDialog;
127 import com.stoutner.privacybrowser.dialogs.DownloadFileDialog;
128 import com.stoutner.privacybrowser.dialogs.DownloadImageDialog;
129 import com.stoutner.privacybrowser.dialogs.DownloadLocationPermissionDialog;
130 import com.stoutner.privacybrowser.dialogs.EditBookmarkDialog;
131 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
132 import com.stoutner.privacybrowser.dialogs.HttpAuthenticationDialog;
133 import com.stoutner.privacybrowser.dialogs.PinnedMismatchDialog;
134 import com.stoutner.privacybrowser.dialogs.SaveWebpageImageDialog;
135 import com.stoutner.privacybrowser.dialogs.SslCertificateErrorDialog;
136 import com.stoutner.privacybrowser.dialogs.StoragePermissionDialog;
137 import com.stoutner.privacybrowser.dialogs.UrlHistoryDialog;
138 import com.stoutner.privacybrowser.dialogs.ViewSslCertificateDialog;
139 import com.stoutner.privacybrowser.fragments.WebViewTabFragment;
140 import com.stoutner.privacybrowser.helpers.AdHelper;
141 import com.stoutner.privacybrowser.helpers.BlocklistHelper;
142 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
143 import com.stoutner.privacybrowser.helpers.CheckPinnedMismatchHelper;
144 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
145 import com.stoutner.privacybrowser.helpers.FileNameHelper;
146 import com.stoutner.privacybrowser.helpers.OrbotProxyHelper;
147 import com.stoutner.privacybrowser.views.NestedScrollWebView;
148
149 import java.io.ByteArrayInputStream;
150 import java.io.ByteArrayOutputStream;
151 import java.io.File;
152 import java.io.IOException;
153 import java.io.UnsupportedEncodingException;
154 import java.net.MalformedURLException;
155 import java.net.URL;
156 import java.net.URLDecoder;
157 import java.net.URLEncoder;
158 import java.util.ArrayList;
159 import java.util.Date;
160 import java.util.HashMap;
161 import java.util.HashSet;
162 import java.util.List;
163 import java.util.Map;
164 import java.util.Set;
165
166 // AppCompatActivity from android.support.v7.app.AppCompatActivity must be used to have access to the SupportActionBar until the minimum API is >= 21.
167 public class MainWebViewActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener,
168         DownloadFileDialog.DownloadFileListener, DownloadImageDialog.DownloadImageListener, DownloadLocationPermissionDialog.DownloadLocationPermissionDialogListener, EditBookmarkDialog.EditBookmarkListener,
169         EditBookmarkFolderDialog.EditBookmarkFolderListener, NavigationView.OnNavigationItemSelectedListener, PinnedMismatchDialog.PinnedMismatchListener, PopulateBlocklists.PopulateBlocklistsListener, SaveWebpageImageDialog.SaveWebpageImageListener,
170         StoragePermissionDialog.StoragePermissionDialogListener, UrlHistoryDialog.NavigateHistoryListener, WebViewTabFragment.NewTabListener {
171
172     // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()`, `onResume()`, and `applyProxyThroughOrbot()`.
173     public static String orbotStatus;
174
175     // The WebView pager adapter is accessed from `HttpAuthenticationDialog`, `PinnedMismatchDialog`, and `SslCertificateErrorDialog`.  It is also used in `onCreate()`, `onResume()`, and `addTab()`.
176     public static WebViewPagerAdapter webViewPagerAdapter;
177
178     // The load URL on restart variables are public static so they can be accessed from `BookmarksActivity`.  They are used in `onRestart()`.
179     public static boolean loadUrlOnRestart;
180     public static String urlToLoadOnRestart;
181
182     // `restartFromBookmarksActivity` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onRestart()`.
183     public static boolean restartFromBookmarksActivity;
184
185     // `currentBookmarksFolder` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onCreate()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`,
186     // `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
187     public static String currentBookmarksFolder;
188
189     // The user agent constants are public static so they can be accessed from `SettingsFragment`, `DomainsActivity`, and `DomainSettingsFragment`.
190     public final static int UNRECOGNIZED_USER_AGENT = -1;
191     public final static int SETTINGS_WEBVIEW_DEFAULT_USER_AGENT = 1;
192     public final static int SETTINGS_CUSTOM_USER_AGENT = 12;
193     public final static int DOMAINS_SYSTEM_DEFAULT_USER_AGENT = 0;
194     public final static int DOMAINS_WEBVIEW_DEFAULT_USER_AGENT = 2;
195     public final static int DOMAINS_CUSTOM_USER_AGENT = 13;
196
197     // Start activity for result request codes.
198     private final int FILE_UPLOAD_REQUEST_CODE = 0;
199     public final static int BROWSE_SAVE_WEBPAGE_IMAGE_REQUEST_CODE = 1;
200
201
202     // The current WebView is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`,
203     // `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`, `onSslMismatchBack()`, `applyProxyThroughOrbot()`, and `applyDomainSettings()`.
204     private NestedScrollWebView currentWebView;
205
206     // `customHeader` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateContextMenu()`, and `loadUrl()`.
207     private final Map<String, String> customHeaders = new HashMap<>();
208
209     // The search URL is set in `applyProxyThroughOrbot()` and used in `onCreate()`, `onNewIntent()`, `loadURLFromTextBox()`, and `initializeWebView()`.
210     private String searchURL;
211
212     // The options menu is set in `onCreateOptionsMenu()` and used in `onOptionsItemSelected()`, `updatePrivacyIcons()`, and `initializeWebView()`.
213     private Menu optionsMenu;
214
215     // The blocklists are populated in `finishedPopulatingBlocklists()` and accessed from `initializeWebView()`.
216     private ArrayList<List<String[]>> easyList;
217     private ArrayList<List<String[]>> easyPrivacy;
218     private ArrayList<List<String[]>> fanboysAnnoyanceList;
219     private ArrayList<List<String[]>> fanboysSocialList;
220     private ArrayList<List<String[]>> ultraList;
221     private ArrayList<List<String[]>> ultraPrivacy;
222
223     // `webViewDefaultUserAgent` is used in `onCreate()` and `onPrepareOptionsMenu()`.
224     private String webViewDefaultUserAgent;
225
226     // `proxyThroughOrbot` is used in `onRestart()`, `onOptionsItemSelected()`, `applyAppSettings()`, and `applyProxyThroughOrbot()`.
227     private boolean proxyThroughOrbot;
228
229     // The incognito mode is set in `applyAppSettings()` and used in `initializeWebView()`.
230     private boolean incognitoModeEnabled;
231
232     // The full screen browsing mode tracker is set it `applyAppSettings()` and used in `initializeWebView()`.
233     private boolean fullScreenBrowsingModeEnabled;
234
235     // `inFullScreenBrowsingMode` is used in `onCreate()`, `onConfigurationChanged()`, and `applyAppSettings()`.
236     private boolean inFullScreenBrowsingMode;
237
238     // The app bar trackers are set in `applyAppSettings()` and used in `initializeWebView()`.
239     private boolean hideAppBar;
240     private boolean scrollAppBar;
241
242     // The loading new intent tracker is set in `onNewIntent()` and used in `setCurrentWebView()`.
243     private boolean loadingNewIntent;
244
245     // `reapplyDomainSettingsOnRestart` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, and `onAddDomain()`, .
246     private boolean reapplyDomainSettingsOnRestart;
247
248     // `reapplyAppSettingsOnRestart` is used in `onNavigationItemSelected()` and `onRestart()`.
249     private boolean reapplyAppSettingsOnRestart;
250
251     // `displayingFullScreenVideo` is used in `onCreate()` and `onResume()`.
252     private boolean displayingFullScreenVideo;
253
254     // `orbotStatusBroadcastReceiver` is used in `onCreate()` and `onDestroy()`.
255     private BroadcastReceiver orbotStatusBroadcastReceiver;
256
257     // `waitingForOrbot` is used in `onCreate()`, `onResume()`, and `applyProxyThroughOrbot()`.
258     private boolean waitingForOrbot;
259
260     // The action bar drawer toggle is initialized in `onCreate()` and used in `onResume()`.
261     private ActionBarDrawerToggle actionBarDrawerToggle;
262
263     // The color spans are used in `onCreate()` and `highlightUrlText()`.
264     private ForegroundColorSpan redColorSpan;
265     private ForegroundColorSpan initialGrayColorSpan;
266     private ForegroundColorSpan finalGrayColorSpan;
267
268     // The drawer header padding variables are used in `onCreate()` and `onConfigurationChanged()`.
269     private int drawerHeaderPaddingLeftAndRight;
270     private int drawerHeaderPaddingTop;
271     private int drawerHeaderPaddingBottom;
272
273     // `bookmarksDatabaseHelper` is used in `onCreate()`, `onDestroy`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`,
274     // and `loadBookmarksFolder()`.
275     private BookmarksDatabaseHelper bookmarksDatabaseHelper;
276
277     // `bookmarksCursor` is used in `onDestroy()`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
278     private Cursor bookmarksCursor;
279
280     // `bookmarksCursorAdapter` is used in `onCreateBookmark()`, `onCreateBookmarkFolder()` `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
281     private CursorAdapter bookmarksCursorAdapter;
282
283     // `oldFolderNameString` is used in `onCreate()` and `onSaveEditBookmarkFolder()`.
284     private String oldFolderNameString;
285
286     // `fileChooserCallback` is used in `onCreate()` and `onActivityResult()`.
287     private ValueCallback<Uri[]> fileChooserCallback;
288
289     // The default progress view offsets are set in `onCreate()` and used in `initializeWebView()`.
290     private int defaultProgressViewStartOffset;
291     private int defaultProgressViewEndOffset;
292
293     // The swipe refresh layout top padding is used when exiting full screen browsing mode.  It is used in an inner class in `initializeWebView()`.
294     private int swipeRefreshLayoutPaddingTop;
295
296     // The URL sanitizers are set in `applyAppSettings()` and used in `sanitizeUrl()`.
297     private boolean sanitizeGoogleAnalytics;
298     private boolean sanitizeFacebookClickIds;
299     private boolean sanitizeTwitterAmpRedirects;
300
301     // The download strings are used in `onCreate()`, `onRequestPermissionResult()` and `initializeWebView()`.
302     private String downloadUrl;
303     private String downloadContentDisposition;
304     private long downloadContentLength;
305
306     // `downloadImageUrl` is used in `onCreateContextMenu()` and `onRequestPermissionResult()`.
307     private String downloadImageUrl;
308
309     // The save website image file path string is used in `onSaveWebpageImage()` and `onRequestPermissionResult()`
310     private String saveWebsiteImageFilePath;
311
312     // The permission result request codes are used in `onCreateContextMenu()`, `onCloseDownloadLocationPermissionDialog()`, `onRequestPermissionResult()`, `onSaveWebpageImage()`,
313     // `onCloseStoragePermissionDialog()`, and `initializeWebView()`.
314     private final int DOWNLOAD_FILE_REQUEST_CODE = 1;
315     private final int DOWNLOAD_IMAGE_REQUEST_CODE = 2;
316     private final int SAVE_WEBPAGE_IMAGE_REQUEST_CODE = 3;
317
318     @Override
319     // Remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
320     @SuppressLint("ClickableViewAccessibility")
321     protected void onCreate(Bundle savedInstanceState) {
322         if (Build.VERSION.SDK_INT >= 21) {
323             WebView.enableSlowWholeDocumentDraw();
324         }
325
326         // Initialize the default preference values the first time the program is run.  `false` keeps this command from resetting any current preferences back to default.
327         PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
328
329         // Get a handle for the shared preferences.
330         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
331
332         // Get the theme and screenshot preferences.
333         boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
334         boolean allowScreenshots = sharedPreferences.getBoolean("allow_screenshots", false);
335
336         // Disable screenshots if not allowed.
337         if (!allowScreenshots) {
338             getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
339         }
340
341         // Set the activity theme.
342         if (darkTheme) {
343             setTheme(R.style.PrivacyBrowserDark);
344         } else {
345             setTheme(R.style.PrivacyBrowserLight);
346         }
347
348         // Run the default commands.
349         super.onCreate(savedInstanceState);
350
351         // Set the content view.
352         setContentView(R.layout.main_framelayout);
353
354         // Get handles for the views that need to be modified.
355         DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
356         Toolbar toolbar = findViewById(R.id.toolbar);
357         ViewPager webViewPager = findViewById(R.id.webviewpager);
358
359         // Set the action bar.  `SupportActionBar` must be used until the minimum API is >= 21.
360         setSupportActionBar(toolbar);
361
362         // Get a handle for the action bar.
363         ActionBar actionBar = getSupportActionBar();
364
365         // This is needed to get rid of the Android Studio warning that the action bar might be null.
366         assert actionBar != null;
367
368         // Add the custom layout, which shows the URL text bar.
369         actionBar.setCustomView(R.layout.url_app_bar);
370         actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
371
372         // Initially disable the sliding drawers.  They will be enabled once the blocklists are loaded.
373         drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
374
375         // Create the hamburger icon at the start of the AppBar.
376         actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.open_navigation_drawer, R.string.close_navigation_drawer);
377
378         // Initialize the web view pager adapter.
379         webViewPagerAdapter = new WebViewPagerAdapter(getSupportFragmentManager());
380
381         // Set the pager adapter on the web view pager.
382         webViewPager.setAdapter(webViewPagerAdapter);
383
384         // Store up to 100 tabs in memory.
385         webViewPager.setOffscreenPageLimit(100);
386
387         // Populate the blocklists.
388         new PopulateBlocklists(this, this).execute();
389     }
390
391     @Override
392     protected void onNewIntent(Intent intent) {
393         // Replace the intent that started the app with this one.
394         setIntent(intent);
395
396         // Process the intent here if Privacy Browser is fully initialized.  If the process has been killed by the system while sitting in the background, this will be handled in `initializeWebView()`.
397         if (ultraPrivacy != null) {
398             // Get the information from the intent.
399             String intentAction = intent.getAction();
400             Uri intentUriData = intent.getData();
401
402             // Determine if this is a web search.
403             boolean isWebSearch = ((intentAction != null) && intentAction.equals(Intent.ACTION_WEB_SEARCH));
404
405             // 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.
406             if (intentUriData != null || isWebSearch) {
407                 // Get the shared preferences.
408                 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
409
410                 // Create a URL string.
411                 String url;
412
413                 // If the intent action is a web search, perform the search.
414                 if (isWebSearch) {
415                     // Create an encoded URL string.
416                     String encodedUrlString;
417
418                     // Sanitize the search input and convert it to a search.
419                     try {
420                         encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
421                     } catch (UnsupportedEncodingException exception) {
422                         encodedUrlString = "";
423                     }
424
425                     // Add the base search URL.
426                     url = searchURL + encodedUrlString;
427                 } else {  // The intent should contain a URL.
428                     // Set the intent data as the URL.
429                     url = intentUriData.toString();
430                 }
431
432                 // Add a new tab if specified in the preferences.
433                 if (sharedPreferences.getBoolean("open_intents_in_new_tab", true)) {  // Load the URL in a new tab.
434                     // Set the loading new intent flag.
435                     loadingNewIntent = true;
436
437                     // Add a new tab.
438                     addNewTab(url, true);
439                 } else {  // Load the URL in the current tab.
440                     // Make it so.
441                     loadUrl(url);
442                 }
443
444                 // Get a handle for the drawer layout.
445                 DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
446
447                 // Close the navigation drawer if it is open.
448                 if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
449                     drawerLayout.closeDrawer(GravityCompat.START);
450                 }
451
452                 // Close the bookmarks drawer if it is open.
453                 if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
454                     drawerLayout.closeDrawer(GravityCompat.END);
455                 }
456             }
457         }
458     }
459
460     @Override
461     public void onRestart() {
462         // Run the default commands.
463         super.onRestart();
464
465         // Make sure Orbot is running if Privacy Browser is proxying through Orbot.
466         if (proxyThroughOrbot) {
467             // Request Orbot to start.  If Orbot is already running no hard will be caused by this request.
468             Intent orbotIntent = new Intent("org.torproject.android.intent.action.START");
469
470             // Send the intent to the Orbot package.
471             orbotIntent.setPackage("org.torproject.android");
472
473             // Make it so.
474             sendBroadcast(orbotIntent);
475         }
476
477         // Apply the app settings if returning from the Settings activity.
478         if (reapplyAppSettingsOnRestart) {
479             // Reset the reapply app settings on restart tracker.
480             reapplyAppSettingsOnRestart = false;
481
482             // Apply the app settings.
483             applyAppSettings();
484         }
485
486         // Apply the domain settings if returning from the settings or domains activity.
487         if (reapplyDomainSettingsOnRestart) {
488             // Reset the reapply domain settings on restart tracker.
489             reapplyDomainSettingsOnRestart = false;
490
491             // Reapply the domain settings for each tab.
492             for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
493                 // Get the WebView tab fragment.
494                 WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
495
496                 // Get the fragment view.
497                 View fragmentView = webViewTabFragment.getView();
498
499                 // Only reload the WebViews if they exist.
500                 if (fragmentView != null) {
501                     // Get the nested scroll WebView from the tab fragment.
502                     NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
503
504                     // Reset the current domain name so the domain settings will be reapplied.
505                     nestedScrollWebView.resetCurrentDomainName();
506
507                     // Reapply the domain settings if the URL is not null, which can happen if an empty tab is active when returning from settings.
508                     if (nestedScrollWebView.getUrl() != null) {
509                         applyDomainSettings(nestedScrollWebView, nestedScrollWebView.getUrl(), false, true);
510                     }
511                 }
512             }
513         }
514
515         // Load the URL on restart (used when loading a bookmark).
516         if (loadUrlOnRestart) {
517             // Load the specified URL.
518             loadUrl(urlToLoadOnRestart);
519
520             // Reset the load on restart tracker.
521             loadUrlOnRestart = false;
522         }
523
524         // Update the bookmarks drawer if returning from the Bookmarks activity.
525         if (restartFromBookmarksActivity) {
526             // Get a handle for the drawer layout.
527             DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
528
529             // Close the bookmarks drawer.
530             drawerLayout.closeDrawer(GravityCompat.END);
531
532             // Reload the bookmarks drawer.
533             loadBookmarksFolder();
534
535             // Reset `restartFromBookmarksActivity`.
536             restartFromBookmarksActivity = false;
537         }
538
539         // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
540         updatePrivacyIcons(true);
541     }
542
543     // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
544     @Override
545     public void onResume() {
546         // Run the default commands.
547         super.onResume();
548
549         for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
550             // Get the WebView tab fragment.
551             WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
552
553             // Get the fragment view.
554             View fragmentView = webViewTabFragment.getView();
555
556             // Only resume the WebViews if they exist (they won't when the app is first created).
557             if (fragmentView != null) {
558                 // Get the nested scroll WebView from the tab fragment.
559                 NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
560
561                 // Resume the nested scroll WebView JavaScript timers.
562                 nestedScrollWebView.resumeTimers();
563
564                 // Resume the nested scroll WebView.
565                 nestedScrollWebView.onResume();
566             }
567         }
568
569         // Display a message to the user if waiting for Orbot.
570         if (waitingForOrbot && !orbotStatus.equals("ON")) {
571             // Disable the wide view port so that the waiting for Orbot text is displayed correctly.
572             currentWebView.getSettings().setUseWideViewPort(false);
573
574             // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
575             currentWebView.loadData("<html><body><br/><center><h1>" + getString(R.string.waiting_for_orbot) + "</h1></center></body></html>", "text/html", null);
576         }
577
578         if (displayingFullScreenVideo || inFullScreenBrowsingMode) {
579             // Get a handle for the root frame layouts.
580             FrameLayout rootFrameLayout = findViewById(R.id.root_framelayout);
581
582             // Remove the translucent status flag.  This is necessary so the root frame layout can fill the entire screen.
583             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
584
585             /* Hide the system bars.
586              * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
587              * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
588              * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
589              * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
590              */
591             rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
592                     View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
593         } else if (BuildConfig.FLAVOR.contentEquals("free")) {  // Resume the adView for the free flavor.
594             // Resume the ad.
595             AdHelper.resumeAd(findViewById(R.id.adview));
596         }
597     }
598
599     @Override
600     public void onPause() {
601         // Run the default commands.
602         super.onPause();
603
604         for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
605             // Get the WebView tab fragment.
606             WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
607
608             // Get the fragment view.
609             View fragmentView = webViewTabFragment.getView();
610
611             // Only pause the WebViews if they exist (they won't when the app is first created).
612             if (fragmentView != null) {
613                 // Get the nested scroll WebView from the tab fragment.
614                 NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
615
616                 // Pause the nested scroll WebView.
617                 nestedScrollWebView.onPause();
618
619                 // Pause the nested scroll WebView JavaScript timers.
620                 nestedScrollWebView.pauseTimers();
621             }
622         }
623
624         // Pause the ad or it will continue to consume resources in the background on the free flavor.
625         if (BuildConfig.FLAVOR.contentEquals("free")) {
626             // Pause the ad.
627             AdHelper.pauseAd(findViewById(R.id.adview));
628         }
629     }
630
631     @Override
632     public void onDestroy() {
633         // Unregister the Orbot status broadcast receiver.
634         this.unregisterReceiver(orbotStatusBroadcastReceiver);
635
636         // Close the bookmarks cursor and database.
637         bookmarksCursor.close();
638         bookmarksDatabaseHelper.close();
639
640         // Run the default commands.
641         super.onDestroy();
642     }
643
644     @Override
645     public boolean onCreateOptionsMenu(Menu menu) {
646         // Inflate the menu.  This adds items to the action bar if it is present.
647         getMenuInflater().inflate(R.menu.webview_options_menu, menu);
648
649         // Store a handle for the options menu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons()`.
650         optionsMenu = menu;
651
652         // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
653         updatePrivacyIcons(false);
654
655         // Get handles for the menu items.
656         MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
657         MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
658         MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
659         MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
660         MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
661         MenuItem refreshMenuItem = menu.findItem(R.id.refresh);
662         MenuItem adConsentMenuItem = menu.findItem(R.id.ad_consent);
663
664         // Only display third-party cookies if API >= 21
665         toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
666
667         // Only display the form data menu items if the API < 26.
668         toggleSaveFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
669         clearFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
670
671         // Disable the clear form data menu item if the API >= 26 so that the status of the main Clear Data is calculated correctly.
672         clearFormDataMenuItem.setEnabled(Build.VERSION.SDK_INT < 26);
673
674         // Only show Ad Consent if this is the free flavor.
675         adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
676
677         // Get the shared preferences.
678         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
679
680         // Get the dark theme and app bar preferences..
681         boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean("display_additional_app_bar_icons", false);
682         boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
683
684         // 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.
685         if (displayAdditionalAppBarIcons) {
686             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
687             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
688             refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
689         } else { //Do not display the additional icons.
690             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
691             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
692             refreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
693         }
694
695         // Replace Refresh with Stop if a URL is already loading.
696         if (currentWebView != null && currentWebView.getProgress() != 100) {
697             // Set the title.
698             refreshMenuItem.setTitle(R.string.stop);
699
700             // If the icon is displayed in the AppBar, set it according to the theme.
701             if (displayAdditionalAppBarIcons) {
702                 if (darkTheme) {
703                     refreshMenuItem.setIcon(R.drawable.close_dark);
704                 } else {
705                     refreshMenuItem.setIcon(R.drawable.close_light);
706                 }
707             }
708         }
709
710         // Done.
711         return true;
712     }
713
714     @Override
715     public boolean onPrepareOptionsMenu(Menu menu) {
716         // Get handles for the menu items.
717         MenuItem addOrEditDomain = menu.findItem(R.id.add_or_edit_domain);
718         MenuItem firstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
719         MenuItem thirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
720         MenuItem domStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
721         MenuItem saveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);  // Form data can be removed once the minimum API >= 26.
722         MenuItem clearDataMenuItem = menu.findItem(R.id.clear_data);
723         MenuItem clearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
724         MenuItem clearDOMStorageMenuItem = menu.findItem(R.id.clear_dom_storage);
725         MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
726         MenuItem blocklistsMenuItem = menu.findItem(R.id.blocklists);
727         MenuItem easyListMenuItem = menu.findItem(R.id.easylist);
728         MenuItem easyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
729         MenuItem fanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
730         MenuItem fanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
731         MenuItem ultraListMenuItem = menu.findItem(R.id.ultralist);
732         MenuItem ultraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
733         MenuItem blockAllThirdPartyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
734         MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
735         MenuItem swipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
736         MenuItem wideViewportMenuItem = menu.findItem(R.id.wide_viewport);
737         MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
738         MenuItem nightModeMenuItem = menu.findItem(R.id.night_mode);
739         MenuItem proxyThroughOrbotMenuItem = menu.findItem(R.id.proxy_through_orbot);
740
741         // Get a handle for the cookie manager.
742         CookieManager cookieManager = CookieManager.getInstance();
743
744         // Initialize the current user agent string and the font size.
745         String currentUserAgent = getString(R.string.user_agent_privacy_browser);
746         int fontSize = 100;
747
748         // 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.
749         if (currentWebView != null) {
750             // Set the add or edit domain text.
751             if (currentWebView.getDomainSettingsApplied()) {
752                 addOrEditDomain.setTitle(R.string.edit_domain_settings);
753             } else {
754                 addOrEditDomain.setTitle(R.string.add_domain_settings);
755             }
756
757             // Get the current user agent from the WebView.
758             currentUserAgent = currentWebView.getSettings().getUserAgentString();
759
760             // Get the current font size from the
761             fontSize = currentWebView.getSettings().getTextZoom();
762
763             // Set the status of the menu item checkboxes.
764             domStorageMenuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
765             saveFormDataMenuItem.setChecked(currentWebView.getSettings().getSaveFormData());  // Form data can be removed once the minimum API >= 26.
766             easyListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
767             easyPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
768             fanboysAnnoyanceListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
769             fanboysSocialBlockingListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
770             ultraListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
771             ultraPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
772             blockAllThirdPartyRequestsMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
773             swipeToRefreshMenuItem.setChecked(currentWebView.getSwipeToRefresh());
774             wideViewportMenuItem.setChecked(currentWebView.getSettings().getUseWideViewPort());
775             displayImagesMenuItem.setChecked(currentWebView.getSettings().getLoadsImagesAutomatically());
776             nightModeMenuItem.setChecked(currentWebView.getNightMode());
777
778             // Initialize the display names for the blocklists with the number of blocked requests.
779             blocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + currentWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
780             easyListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASYLIST) + " - " + getString(R.string.easylist));
781             easyPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASYPRIVACY) + " - " + getString(R.string.easyprivacy));
782             fanboysAnnoyanceListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST) + " - " + getString(R.string.fanboys_annoyance_list));
783             fanboysSocialBlockingListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST) + " - " + getString(R.string.fanboys_social_blocking_list));
784             ultraListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.ULTRALIST) + " - " + getString(R.string.ultralist));
785             ultraPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.ULTRAPRIVACY) + " - " + getString(R.string.ultraprivacy));
786             blockAllThirdPartyRequestsMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS) + " - " + getString(R.string.block_all_third_party_requests));
787
788             // Only modify third-party cookies if the API >= 21.
789             if (Build.VERSION.SDK_INT >= 21) {
790                 // Set the status of the third-party cookies checkbox.
791                 thirdPartyCookiesMenuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
792
793                 // Enable third-party cookies if first-party cookies are enabled.
794                 thirdPartyCookiesMenuItem.setEnabled(cookieManager.acceptCookie());
795             }
796
797             // Enable DOM Storage if JavaScript is enabled.
798             domStorageMenuItem.setEnabled(currentWebView.getSettings().getJavaScriptEnabled());
799         }
800
801         // Set the status of the menu item checkboxes.
802         firstPartyCookiesMenuItem.setChecked(cookieManager.acceptCookie());
803         proxyThroughOrbotMenuItem.setChecked(proxyThroughOrbot);
804
805         // Enable Clear Cookies if there are any.
806         clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
807
808         // 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`.
809         String privateDataDirectoryString = getApplicationInfo().dataDir;
810
811         // Get a count of the number of files in the Local Storage directory.
812         File localStorageDirectory = new File (privateDataDirectoryString + "/app_webview/Local Storage/");
813         int localStorageDirectoryNumberOfFiles = 0;
814         if (localStorageDirectory.exists()) {
815             localStorageDirectoryNumberOfFiles = localStorageDirectory.list().length;
816         }
817
818         // Get a count of the number of files in the IndexedDB directory.
819         File indexedDBDirectory = new File (privateDataDirectoryString + "/app_webview/IndexedDB");
820         int indexedDBDirectoryNumberOfFiles = 0;
821         if (indexedDBDirectory.exists()) {
822             indexedDBDirectoryNumberOfFiles = indexedDBDirectory.list().length;
823         }
824
825         // Enable Clear DOM Storage if there is any.
826         clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
827
828         // Enable Clear Form Data is there is any.  This can be removed once the minimum API >= 26.
829         if (Build.VERSION.SDK_INT < 26) {
830             // Get the WebView database.
831             WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
832
833             // Enable the clear form data menu item if there is anything to clear.
834             clearFormDataMenuItem.setEnabled(webViewDatabase.hasFormData());
835         }
836
837         // Enable Clear Data if any of the submenu items are enabled.
838         clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
839
840         // Disable Fanboy's Social Blocking List menu item if Fanboy's Annoyance List is checked.
841         fanboysSocialBlockingListMenuItem.setEnabled(!fanboysAnnoyanceListMenuItem.isChecked());
842
843         // Select the current user agent menu item.  A switch statement cannot be used because the user agents are not compile time constants.
844         if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[0])) {  // Privacy Browser.
845             menu.findItem(R.id.user_agent_privacy_browser).setChecked(true);
846         } else if (currentUserAgent.equals(webViewDefaultUserAgent)) {  // WebView Default.
847             menu.findItem(R.id.user_agent_webview_default).setChecked(true);
848         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[2])) {  // Firefox on Android.
849             menu.findItem(R.id.user_agent_firefox_on_android).setChecked(true);
850         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[3])) {  // Chrome on Android.
851             menu.findItem(R.id.user_agent_chrome_on_android).setChecked(true);
852         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[4])) {  // Safari on iOS.
853             menu.findItem(R.id.user_agent_safari_on_ios).setChecked(true);
854         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[5])) {  // Firefox on Linux.
855             menu.findItem(R.id.user_agent_firefox_on_linux).setChecked(true);
856         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[6])) {  // Chromium on Linux.
857             menu.findItem(R.id.user_agent_chromium_on_linux).setChecked(true);
858         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[7])) {  // Firefox on Windows.
859             menu.findItem(R.id.user_agent_firefox_on_windows).setChecked(true);
860         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[8])) {  // Chrome on Windows.
861             menu.findItem(R.id.user_agent_chrome_on_windows).setChecked(true);
862         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[9])) {  // Edge on Windows.
863             menu.findItem(R.id.user_agent_edge_on_windows).setChecked(true);
864         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[10])) {  // Internet Explorer on Windows.
865             menu.findItem(R.id.user_agent_internet_explorer_on_windows).setChecked(true);
866         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[11])) {  // Safari on macOS.
867             menu.findItem(R.id.user_agent_safari_on_macos).setChecked(true);
868         } else {  // Custom user agent.
869             menu.findItem(R.id.user_agent_custom).setChecked(true);
870         }
871
872         // Instantiate the font size title and the selected font size menu item.
873         String fontSizeTitle;
874         MenuItem selectedFontSizeMenuItem;
875
876         // Prepare the font size title and current size menu item.
877         switch (fontSize) {
878             case 25:
879                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.twenty_five_percent);
880                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_twenty_five_percent);
881                 break;
882
883             case 50:
884                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
885                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
886                 break;
887
888             case 75:
889                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.seventy_five_percent);
890                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_seventy_five_percent);
891                 break;
892
893             case 100:
894                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
895                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
896                 break;
897
898             case 125:
899                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_twenty_five_percent);
900                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_twenty_five_percent);
901                 break;
902
903             case 150:
904                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_fifty_percent);
905                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_fifty_percent);
906                 break;
907
908             case 175:
909                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_seventy_five_percent);
910                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_seventy_five_percent);
911                 break;
912
913             case 200:
914                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.two_hundred_percent);
915                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_two_hundred_percent);
916                 break;
917
918             default:
919                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
920                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
921                 break;
922         }
923
924         // Set the font size title and select the current size menu item.
925         fontSizeMenuItem.setTitle(fontSizeTitle);
926         selectedFontSizeMenuItem.setChecked(true);
927
928         // Run all the other default commands.
929         super.onPrepareOptionsMenu(menu);
930
931         // Display the menu.
932         return true;
933     }
934
935     @Override
936     // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
937     @SuppressLint("SetJavaScriptEnabled")
938     public boolean onOptionsItemSelected(MenuItem menuItem) {
939         // Get the selected menu item ID.
940         int menuItemId = menuItem.getItemId();
941
942         // Get a handle for the shared preferences.
943         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
944
945         // Get a handle for the cookie manager.
946         CookieManager cookieManager = CookieManager.getInstance();
947
948         // Run the commands that correlate to the selected menu item.
949         switch (menuItemId) {
950             case R.id.toggle_javascript:
951                 // Toggle the JavaScript status.
952                 currentWebView.getSettings().setJavaScriptEnabled(!currentWebView.getSettings().getJavaScriptEnabled());
953
954                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
955                 updatePrivacyIcons(true);
956
957                 // Display a `Snackbar`.
958                 if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScrip is enabled.
959                     Snackbar.make(findViewById(R.id.webviewpager), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
960                 } else if (cookieManager.acceptCookie()) {  // JavaScript is disabled, but first-party cookies are enabled.
961                     Snackbar.make(findViewById(R.id.webviewpager), R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
962                 } else {  // Privacy mode.
963                     Snackbar.make(findViewById(R.id.webviewpager), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
964                 }
965
966                 // Reload the current WebView.
967                 currentWebView.reload();
968
969                 // Consume the event.
970                 return true;
971
972             case R.id.add_or_edit_domain:
973                 if (currentWebView.getDomainSettingsApplied()) {  // Edit the current domain settings.
974                     // Reapply the domain settings on returning to `MainWebViewActivity`.
975                     reapplyDomainSettingsOnRestart = true;
976
977                     // Create an intent to launch the domains activity.
978                     Intent domainsIntent = new Intent(this, DomainsActivity.class);
979
980                     // Add the extra information to the intent.
981                     domainsIntent.putExtra("load_domain", currentWebView.getDomainSettingsDatabaseId());
982                     domainsIntent.putExtra("close_on_back", true);
983                     domainsIntent.putExtra("current_url", currentWebView.getUrl());
984
985                     // Get the current certificate.
986                     SslCertificate sslCertificate = currentWebView.getCertificate();
987
988                     // Check to see if the SSL certificate is populated.
989                     if (sslCertificate != null) {
990                         // Extract the certificate to strings.
991                         String issuedToCName = sslCertificate.getIssuedTo().getCName();
992                         String issuedToOName = sslCertificate.getIssuedTo().getOName();
993                         String issuedToUName = sslCertificate.getIssuedTo().getUName();
994                         String issuedByCName = sslCertificate.getIssuedBy().getCName();
995                         String issuedByOName = sslCertificate.getIssuedBy().getOName();
996                         String issuedByUName = sslCertificate.getIssuedBy().getUName();
997                         long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
998                         long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
999
1000                         // Add the certificate to the intent.
1001                         domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
1002                         domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
1003                         domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
1004                         domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
1005                         domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
1006                         domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
1007                         domainsIntent.putExtra("ssl_start_date", startDateLong);
1008                         domainsIntent.putExtra("ssl_end_date", endDateLong);
1009                     }
1010
1011                     // Check to see if the current IP addresses have been received.
1012                     if (currentWebView.hasCurrentIpAddresses()) {
1013                         // Add the current IP addresses to the intent.
1014                         domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
1015                     }
1016
1017                     // Make it so.
1018                     startActivity(domainsIntent);
1019                 } else {  // Add a new domain.
1020                     // Apply the new domain settings on returning to `MainWebViewActivity`.
1021                     reapplyDomainSettingsOnRestart = true;
1022
1023                     // Get the current domain
1024                     Uri currentUri = Uri.parse(currentWebView.getUrl());
1025                     String currentDomain = currentUri.getHost();
1026
1027                     // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
1028                     DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
1029
1030                     // Create the domain and store the database ID.
1031                     int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
1032
1033                     // Create an intent to launch the domains activity.
1034                     Intent domainsIntent = new Intent(this, DomainsActivity.class);
1035
1036                     // Add the extra information to the intent.
1037                     domainsIntent.putExtra("load_domain", newDomainDatabaseId);
1038                     domainsIntent.putExtra("close_on_back", true);
1039                     domainsIntent.putExtra("current_url", currentWebView.getUrl());
1040
1041                     // Get the current certificate.
1042                     SslCertificate sslCertificate = currentWebView.getCertificate();
1043
1044                     // Check to see if the SSL certificate is populated.
1045                     if (sslCertificate != null) {
1046                         // Extract the certificate to strings.
1047                         String issuedToCName = sslCertificate.getIssuedTo().getCName();
1048                         String issuedToOName = sslCertificate.getIssuedTo().getOName();
1049                         String issuedToUName = sslCertificate.getIssuedTo().getUName();
1050                         String issuedByCName = sslCertificate.getIssuedBy().getCName();
1051                         String issuedByOName = sslCertificate.getIssuedBy().getOName();
1052                         String issuedByUName = sslCertificate.getIssuedBy().getUName();
1053                         long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
1054                         long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
1055
1056                         // Add the certificate to the intent.
1057                         domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
1058                         domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
1059                         domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
1060                         domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
1061                         domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
1062                         domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
1063                         domainsIntent.putExtra("ssl_start_date", startDateLong);
1064                         domainsIntent.putExtra("ssl_end_date", endDateLong);
1065                     }
1066
1067                     // Check to see if the current IP addresses have been received.
1068                     if (currentWebView.hasCurrentIpAddresses()) {
1069                         // Add the current IP addresses to the intent.
1070                         domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
1071                     }
1072
1073                     // Make it so.
1074                     startActivity(domainsIntent);
1075                 }
1076
1077                 // Consume the event.
1078                 return true;
1079
1080             case R.id.toggle_first_party_cookies:
1081                 // Switch the first-party cookie status.
1082                 cookieManager.setAcceptCookie(!cookieManager.acceptCookie());
1083
1084                 // Store the first-party cookie status.
1085                 currentWebView.setAcceptFirstPartyCookies(cookieManager.acceptCookie());
1086
1087                 // Update the menu checkbox.
1088                 menuItem.setChecked(cookieManager.acceptCookie());
1089
1090                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1091                 updatePrivacyIcons(true);
1092
1093                 // Display a snackbar.
1094                 if (cookieManager.acceptCookie()) {  // First-party cookies are enabled.
1095                     Snackbar.make(findViewById(R.id.webviewpager), R.string.first_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
1096                 } else if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScript is still enabled.
1097                     Snackbar.make(findViewById(R.id.webviewpager), R.string.first_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
1098                 } else {  // Privacy mode.
1099                     Snackbar.make(findViewById(R.id.webviewpager), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
1100                 }
1101
1102                 // Reload the current WebView.
1103                 currentWebView.reload();
1104
1105                 // Consume the event.
1106                 return true;
1107
1108             case R.id.toggle_third_party_cookies:
1109                 if (Build.VERSION.SDK_INT >= 21) {
1110                     // Switch the status of thirdPartyCookiesEnabled.
1111                     cookieManager.setAcceptThirdPartyCookies(currentWebView, !cookieManager.acceptThirdPartyCookies(currentWebView));
1112
1113                     // Update the menu checkbox.
1114                     menuItem.setChecked(cookieManager.acceptThirdPartyCookies(currentWebView));
1115
1116                     // Display a snackbar.
1117                     if (cookieManager.acceptThirdPartyCookies(currentWebView)) {
1118                         Snackbar.make(findViewById(R.id.webviewpager), R.string.third_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
1119                     } else {
1120                         Snackbar.make(findViewById(R.id.webviewpager), R.string.third_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
1121                     }
1122
1123                     // Reload the current WebView.
1124                     currentWebView.reload();
1125                 } // Else do nothing because SDK < 21.
1126
1127                 // Consume the event.
1128                 return true;
1129
1130             case R.id.toggle_dom_storage:
1131                 // Toggle the status of domStorageEnabled.
1132                 currentWebView.getSettings().setDomStorageEnabled(!currentWebView.getSettings().getDomStorageEnabled());
1133
1134                 // Update the menu checkbox.
1135                 menuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
1136
1137                 // Update the privacy icon.  `true` refreshes the app bar icons.
1138                 updatePrivacyIcons(true);
1139
1140                 // Display a snackbar.
1141                 if (currentWebView.getSettings().getDomStorageEnabled()) {
1142                     Snackbar.make(findViewById(R.id.webviewpager), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
1143                 } else {
1144                     Snackbar.make(findViewById(R.id.webviewpager), R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
1145                 }
1146
1147                 // Reload the current WebView.
1148                 currentWebView.reload();
1149
1150                 // Consume the event.
1151                 return true;
1152
1153             // Form data can be removed once the minimum API >= 26.
1154             case R.id.toggle_save_form_data:
1155                 // Switch the status of saveFormDataEnabled.
1156                 currentWebView.getSettings().setSaveFormData(!currentWebView.getSettings().getSaveFormData());
1157
1158                 // Update the menu checkbox.
1159                 menuItem.setChecked(currentWebView.getSettings().getSaveFormData());
1160
1161                 // Display a snackbar.
1162                 if (currentWebView.getSettings().getSaveFormData()) {
1163                     Snackbar.make(findViewById(R.id.webviewpager), R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
1164                 } else {
1165                     Snackbar.make(findViewById(R.id.webviewpager), R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
1166                 }
1167
1168                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1169                 updatePrivacyIcons(true);
1170
1171                 // Reload the current WebView.
1172                 currentWebView.reload();
1173
1174                 // Consume the event.
1175                 return true;
1176
1177             case R.id.clear_cookies:
1178                 Snackbar.make(findViewById(R.id.webviewpager), R.string.cookies_deleted, Snackbar.LENGTH_LONG)
1179                         .setAction(R.string.undo, v -> {
1180                             // Do nothing because everything will be handled by `onDismissed()` below.
1181                         })
1182                         .addCallback(new Snackbar.Callback() {
1183                             @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
1184                             @Override
1185                             public void onDismissed(Snackbar snackbar, int event) {
1186                                 if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
1187                                     // Delete the cookies, which command varies by SDK.
1188                                     if (Build.VERSION.SDK_INT < 21) {
1189                                         cookieManager.removeAllCookie();
1190                                     } else {
1191                                         cookieManager.removeAllCookies(null);
1192                                     }
1193                                 }
1194                             }
1195                         })
1196                         .show();
1197
1198                 // Consume the event.
1199                 return true;
1200
1201             case R.id.clear_dom_storage:
1202                 Snackbar.make(findViewById(R.id.webviewpager), R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
1203                         .setAction(R.string.undo, v -> {
1204                             // Do nothing because everything will be handled by `onDismissed()` below.
1205                         })
1206                         .addCallback(new Snackbar.Callback() {
1207                             @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
1208                             @Override
1209                             public void onDismissed(Snackbar snackbar, int event) {
1210                                 if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
1211                                     // Delete the DOM Storage.
1212                                     WebStorage webStorage = WebStorage.getInstance();
1213                                     webStorage.deleteAllData();
1214
1215                                     // Initialize a handler to manually delete the DOM storage files and directories.
1216                                     Handler deleteDomStorageHandler = new Handler();
1217
1218                                     // Setup a runnable to manually delete the DOM storage files and directories.
1219                                     Runnable deleteDomStorageRunnable = () -> {
1220                                         try {
1221                                             // Get a handle for the runtime.
1222                                             Runtime runtime = Runtime.getRuntime();
1223
1224                                             // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`,
1225                                             // which links to `/data/data/com.stoutner.privacybrowser.standard`.
1226                                             String privateDataDirectoryString = getApplicationInfo().dataDir;
1227
1228                                             // A string array must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
1229                                             Process deleteLocalStorageProcess = runtime.exec(new String[]{"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
1230
1231                                             // Multiple commands must be used because `Runtime.exec()` does not like `*`.
1232                                             Process deleteIndexProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
1233                                             Process deleteQuotaManagerProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
1234                                             Process deleteQuotaManagerJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
1235                                             Process deleteDatabasesProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
1236
1237                                             // Wait for the processes to finish.
1238                                             deleteLocalStorageProcess.waitFor();
1239                                             deleteIndexProcess.waitFor();
1240                                             deleteQuotaManagerProcess.waitFor();
1241                                             deleteQuotaManagerJournalProcess.waitFor();
1242                                             deleteDatabasesProcess.waitFor();
1243                                         } catch (Exception exception) {
1244                                             // Do nothing if an error is thrown.
1245                                         }
1246                                     };
1247
1248                                     // Manually delete the DOM storage files after 200 milliseconds.
1249                                     deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
1250                                 }
1251                             }
1252                         })
1253                         .show();
1254
1255                 // Consume the event.
1256                 return true;
1257
1258             // Form data can be remove once the minimum API >= 26.
1259             case R.id.clear_form_data:
1260                 Snackbar.make(findViewById(R.id.webviewpager), R.string.form_data_deleted, Snackbar.LENGTH_LONG)
1261                         .setAction(R.string.undo, v -> {
1262                             // Do nothing because everything will be handled by `onDismissed()` below.
1263                         })
1264                         .addCallback(new Snackbar.Callback() {
1265                             @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
1266                             @Override
1267                             public void onDismissed(Snackbar snackbar, int event) {
1268                                 if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
1269                                     // Delete the form data.
1270                                     WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
1271                                     mainWebViewDatabase.clearFormData();
1272                                 }
1273                             }
1274                         })
1275                         .show();
1276
1277                 // Consume the event.
1278                 return true;
1279
1280             case R.id.easylist:
1281                 // Toggle the EasyList status.
1282                 currentWebView.enableBlocklist(NestedScrollWebView.EASYLIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
1283
1284                 // Update the menu checkbox.
1285                 menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
1286
1287                 // Reload the current WebView.
1288                 currentWebView.reload();
1289
1290                 // Consume the event.
1291                 return true;
1292
1293             case R.id.easyprivacy:
1294                 // Toggle the EasyPrivacy status.
1295                 currentWebView.enableBlocklist(NestedScrollWebView.EASYPRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
1296
1297                 // Update the menu checkbox.
1298                 menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
1299
1300                 // Reload the current WebView.
1301                 currentWebView.reload();
1302
1303                 // Consume the event.
1304                 return true;
1305
1306             case R.id.fanboys_annoyance_list:
1307                 // Toggle Fanboy's Annoyance List status.
1308                 currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
1309
1310                 // Update the menu checkbox.
1311                 menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
1312
1313                 // Update the staus of Fanboy's Social Blocking List.
1314                 MenuItem fanboysSocialBlockingListMenuItem = optionsMenu.findItem(R.id.fanboys_social_blocking_list);
1315                 fanboysSocialBlockingListMenuItem.setEnabled(!currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
1316
1317                 // Reload the current WebView.
1318                 currentWebView.reload();
1319
1320                 // Consume the event.
1321                 return true;
1322
1323             case R.id.fanboys_social_blocking_list:
1324                 // Toggle Fanboy's Social Blocking List status.
1325                 currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
1326
1327                 // Update the menu checkbox.
1328                 menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
1329
1330                 // Reload the current WebView.
1331                 currentWebView.reload();
1332
1333                 // Consume the event.
1334                 return true;
1335
1336             case R.id.ultralist:
1337                 // Toggle the UltraList status.
1338                 currentWebView.enableBlocklist(NestedScrollWebView.ULTRALIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
1339
1340                 // Update the menu checkbox.
1341                 menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
1342
1343                 // Reload the current WebView.
1344                 currentWebView.reload();
1345
1346                 // Consume the event.
1347                 return true;
1348
1349             case R.id.ultraprivacy:
1350                 // Toggle the UltraPrivacy status.
1351                 currentWebView.enableBlocklist(NestedScrollWebView.ULTRAPRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
1352
1353                 // Update the menu checkbox.
1354                 menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
1355
1356                 // Reload the current WebView.
1357                 currentWebView.reload();
1358
1359                 // Consume the event.
1360                 return true;
1361
1362             case R.id.block_all_third_party_requests:
1363                 //Toggle the third-party requests blocker status.
1364                 currentWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS, !currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
1365
1366                 // Update the menu checkbox.
1367                 menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
1368
1369                 // Reload the current WebView.
1370                 currentWebView.reload();
1371
1372                 // Consume the event.
1373                 return true;
1374
1375             case R.id.user_agent_privacy_browser:
1376                 // Update the user agent.
1377                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
1378
1379                 // Reload the current WebView.
1380                 currentWebView.reload();
1381
1382                 // Consume the event.
1383                 return true;
1384
1385             case R.id.user_agent_webview_default:
1386                 // Update the user agent.
1387                 currentWebView.getSettings().setUserAgentString("");
1388
1389                 // Reload the current WebView.
1390                 currentWebView.reload();
1391
1392                 // Consume the event.
1393                 return true;
1394
1395             case R.id.user_agent_firefox_on_android:
1396                 // Update the user agent.
1397                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
1398
1399                 // Reload the current WebView.
1400                 currentWebView.reload();
1401
1402                 // Consume the event.
1403                 return true;
1404
1405             case R.id.user_agent_chrome_on_android:
1406                 // Update the user agent.
1407                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);
1408
1409                 // Reload the current WebView.
1410                 currentWebView.reload();
1411
1412                 // Consume the event.
1413                 return true;
1414
1415             case R.id.user_agent_safari_on_ios:
1416                 // Update the user agent.
1417                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
1418
1419                 // Reload the current WebView.
1420                 currentWebView.reload();
1421
1422                 // Consume the event.
1423                 return true;
1424
1425             case R.id.user_agent_firefox_on_linux:
1426                 // Update the user agent.
1427                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
1428
1429                 // Reload the current WebView.
1430                 currentWebView.reload();
1431
1432                 // Consume the event.
1433                 return true;
1434
1435             case R.id.user_agent_chromium_on_linux:
1436                 // Update the user agent.
1437                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
1438
1439                 // Reload the current WebView.
1440                 currentWebView.reload();
1441
1442                 // Consume the event.
1443                 return true;
1444
1445             case R.id.user_agent_firefox_on_windows:
1446                 // Update the user agent.
1447                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
1448
1449                 // Reload the current WebView.
1450                 currentWebView.reload();
1451
1452                 // Consume the event.
1453                 return true;
1454
1455             case R.id.user_agent_chrome_on_windows:
1456                 // Update the user agent.
1457                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
1458
1459                 // Reload the current WebView.
1460                 currentWebView.reload();
1461
1462                 // Consume the event.
1463                 return true;
1464
1465             case R.id.user_agent_edge_on_windows:
1466                 // Update the user agent.
1467                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
1468
1469                 // Reload the current WebView.
1470                 currentWebView.reload();
1471
1472                 // Consume the event.
1473                 return true;
1474
1475             case R.id.user_agent_internet_explorer_on_windows:
1476                 // Update the user agent.
1477                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
1478
1479                 // Reload the current WebView.
1480                 currentWebView.reload();
1481
1482                 // Consume the event.
1483                 return true;
1484
1485             case R.id.user_agent_safari_on_macos:
1486                 // Update the user agent.
1487                 currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
1488
1489                 // Reload the current WebView.
1490                 currentWebView.reload();
1491
1492                 // Consume the event.
1493                 return true;
1494
1495             case R.id.user_agent_custom:
1496                 // Update the user agent.
1497                 currentWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
1498
1499                 // Reload the current WebView.
1500                 currentWebView.reload();
1501
1502                 // Consume the event.
1503                 return true;
1504
1505             case R.id.font_size_twenty_five_percent:
1506                 // Set the font size.
1507                 currentWebView.getSettings().setTextZoom(25);
1508
1509                 // Consume the event.
1510                 return true;
1511
1512             case R.id.font_size_fifty_percent:
1513                 // Set the font size.
1514                 currentWebView.getSettings().setTextZoom(50);
1515
1516                 // Consume the event.
1517                 return true;
1518
1519             case R.id.font_size_seventy_five_percent:
1520                 // Set the font size.
1521                 currentWebView.getSettings().setTextZoom(75);
1522
1523                 // Consume the event.
1524                 return true;
1525
1526             case R.id.font_size_one_hundred_percent:
1527                 // Set the font size.
1528                 currentWebView.getSettings().setTextZoom(100);
1529
1530                 // Consume the event.
1531                 return true;
1532
1533             case R.id.font_size_one_hundred_twenty_five_percent:
1534                 // Set the font size.
1535                 currentWebView.getSettings().setTextZoom(125);
1536
1537                 // Consume the event.
1538                 return true;
1539
1540             case R.id.font_size_one_hundred_fifty_percent:
1541                 // Set the font size.
1542                 currentWebView.getSettings().setTextZoom(150);
1543
1544                 // Consume the event.
1545                 return true;
1546
1547             case R.id.font_size_one_hundred_seventy_five_percent:
1548                 // Set the font size.
1549                 currentWebView.getSettings().setTextZoom(175);
1550
1551                 // Consume the event.
1552                 return true;
1553
1554             case R.id.font_size_two_hundred_percent:
1555                 // Set the font size.
1556                 currentWebView.getSettings().setTextZoom(200);
1557
1558                 // Consume the event.
1559                 return true;
1560
1561             case R.id.swipe_to_refresh:
1562                 // Toggle the stored status of swipe to refresh.
1563                 currentWebView.setSwipeToRefresh(!currentWebView.getSwipeToRefresh());
1564
1565                 // Get a handle for the swipe refresh layout.
1566                 SwipeRefreshLayout swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
1567
1568                 // Update the swipe refresh layout.
1569                 if (currentWebView.getSwipeToRefresh()) {  // Swipe to refresh is enabled.
1570                     // Only enable the swipe refresh layout if the WebView is scrolled to the top.  It is updated every time the scroll changes.
1571                     swipeRefreshLayout.setEnabled(currentWebView.getY() == 0);
1572                 } else {  // Swipe to refresh is disabled.
1573                     // Disable the swipe refresh layout.
1574                     swipeRefreshLayout.setEnabled(false);
1575                 }
1576
1577                 // Consume the event.
1578                 return true;
1579
1580             case R.id.wide_viewport:
1581                 // Toggle the viewport.
1582                 currentWebView.getSettings().setUseWideViewPort(!currentWebView.getSettings().getUseWideViewPort());
1583
1584                 // Consume the event.
1585                 return true;
1586
1587             case R.id.display_images:
1588                 if (currentWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
1589                     // Disable loading of images.
1590                     currentWebView.getSettings().setLoadsImagesAutomatically(false);
1591
1592                     // Reload the website to remove existing images.
1593                     currentWebView.reload();
1594                 } else {  // Images are not currently loaded automatically.
1595                     // Enable loading of images.  Missing images will be loaded without the need for a reload.
1596                     currentWebView.getSettings().setLoadsImagesAutomatically(true);
1597                 }
1598
1599                 // Consume the event.
1600                 return true;
1601
1602             case R.id.night_mode:
1603                 // Toggle night mode.
1604                 currentWebView.setNightMode(!currentWebView.getNightMode());
1605
1606                 // Enable or disable JavaScript according to night mode, the global preference, and any domain settings.
1607                 if (currentWebView.getNightMode()) {  // Night mode is enabled, which requires JavaScript.
1608                     // Enable JavaScript.
1609                     currentWebView.getSettings().setJavaScriptEnabled(true);
1610                 } else if (currentWebView.getDomainSettingsApplied()) {  // Night mode is disabled and domain settings are applied.  Set JavaScript according to the domain settings.
1611                     // Apply the JavaScript preference that was stored the last time domain settings were loaded.
1612                     currentWebView.getSettings().setJavaScriptEnabled(currentWebView.getDomainSettingsJavaScriptEnabled());
1613                 } else {  // Night mode is disabled and domain settings are not applied.  Set JavaScript according to the global preference.
1614                     // Apply the JavaScript preference.
1615                     currentWebView.getSettings().setJavaScriptEnabled(sharedPreferences.getBoolean("javascript", false));
1616                 }
1617
1618                 // Update the privacy icons.
1619                 updatePrivacyIcons(false);
1620
1621                 // Reload the website.
1622                 currentWebView.reload();
1623
1624                 // Consume the event.
1625                 return true;
1626
1627             case R.id.find_on_page:
1628                 // Get a handle for the views.
1629                 Toolbar toolbar = findViewById(R.id.toolbar);
1630                 LinearLayout findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
1631                 EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
1632
1633                 // Set the minimum height of the find on page linear layout to match the toolbar.
1634                 findOnPageLinearLayout.setMinimumHeight(toolbar.getHeight());
1635
1636                 // Hide the toolbar.
1637                 toolbar.setVisibility(View.GONE);
1638
1639                 // Show the find on page linear layout.
1640                 findOnPageLinearLayout.setVisibility(View.VISIBLE);
1641
1642                 // Display the keyboard.  The app must wait 200 ms before running the command to work around a bug in Android.
1643                 // http://stackoverflow.com/questions/5520085/android-show-softkeyboard-with-showsoftinput-is-not-working
1644                 findOnPageEditText.postDelayed(() -> {
1645                     // Set the focus on `findOnPageEditText`.
1646                     findOnPageEditText.requestFocus();
1647
1648                     // Get a handle for the input method manager.
1649                     InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
1650
1651                     // Remove the lint warning below that the input method manager might be null.
1652                     assert inputMethodManager != null;
1653
1654                     // Display the keyboard.  `0` sets no input flags.
1655                     inputMethodManager.showSoftInput(findOnPageEditText, 0);
1656                 }, 200);
1657
1658                 // Consume the event.
1659                 return true;
1660
1661             case R.id.print:
1662                 // Get a print manager instance.
1663                 PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
1664
1665                 // Remove the lint error below that print manager might be null.
1666                 assert printManager != null;
1667
1668                 // Create a print document adapter from the current WebView.
1669                 PrintDocumentAdapter printDocumentAdapter = currentWebView.createPrintDocumentAdapter();
1670
1671                 // Print the document.
1672                 printManager.print(getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
1673
1674                 // Consume the event.
1675                 return true;
1676
1677             case R.id.save_as_image:
1678                 // Instantiate the save webpage image dialog.
1679                 DialogFragment saveWebpageImageDialogFragment = new SaveWebpageImageDialog();
1680
1681                 // Show the save webpage image dialog.
1682                 saveWebpageImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.save_as_image));
1683
1684                 // Consume the event.
1685                 return true;
1686
1687             case R.id.add_to_homescreen:
1688                 // Instantiate the create home screen shortcut dialog.
1689                 DialogFragment createHomeScreenShortcutDialogFragment = CreateHomeScreenShortcutDialog.createDialog(currentWebView.getTitle(), currentWebView.getUrl(),
1690                         currentWebView.getFavoriteOrDefaultIcon());
1691
1692                 // Show the create home screen shortcut dialog.
1693                 createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
1694
1695                 // Consume the event.
1696                 return true;
1697
1698             case R.id.view_source:
1699                 // Create an intent to launch the view source activity.
1700                 Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
1701
1702                 // Add the variables to the intent.
1703                 viewSourceIntent.putExtra("user_agent", currentWebView.getSettings().getUserAgentString());
1704                 viewSourceIntent.putExtra("current_url", currentWebView.getUrl());
1705
1706                 // Make it so.
1707                 startActivity(viewSourceIntent);
1708
1709                 // Consume the event.
1710                 return true;
1711
1712             case R.id.share_url:
1713                 // Setup the share string.
1714                 String shareString = currentWebView.getTitle() + " – " + currentWebView.getUrl();
1715
1716                 // Create the share intent.
1717                 Intent shareIntent = new Intent(Intent.ACTION_SEND);
1718                 shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
1719                 shareIntent.setType("text/plain");
1720
1721                 // Make it so.
1722                 startActivity(Intent.createChooser(shareIntent, getString(R.string.share_url)));
1723
1724                 // Consume the event.
1725                 return true;
1726
1727             case R.id.open_with_app:
1728                 // Open the URL with an outside app.
1729                 openWithApp(currentWebView.getUrl());
1730
1731                 // Consume the event.
1732                 return true;
1733
1734             case R.id.open_with_browser:
1735                 // Open the URL with an outside browser.
1736                 openWithBrowser(currentWebView.getUrl());
1737
1738                 // Consume the event.
1739                 return true;
1740
1741             case R.id.proxy_through_orbot:
1742                 // Toggle the proxy through Orbot variable.
1743                 proxyThroughOrbot = !proxyThroughOrbot;
1744
1745                 // Apply the proxy through Orbot settings.
1746                 applyProxyThroughOrbot(true);
1747
1748                 // Consume the event.
1749                 return true;
1750
1751             case R.id.refresh:
1752                 if (menuItem.getTitle().equals(getString(R.string.refresh))) {  // The refresh button was pushed.
1753                     // Reload the current WebView.
1754                     currentWebView.reload();
1755                 } else {  // The stop button was pushed.
1756                     // Stop the loading of the WebView.
1757                     currentWebView.stopLoading();
1758                 }
1759
1760                 // Consume the event.
1761                 return true;
1762
1763             case R.id.ad_consent:
1764                 // Instantiate the ad consent dialog.
1765                 DialogFragment adConsentDialogFragment = new AdConsentDialog();
1766
1767                 // Display the ad consent dialog.
1768                 adConsentDialogFragment.show(getSupportFragmentManager(), getString(R.string.ad_consent));
1769
1770                 // Consume the event.
1771                 return true;
1772
1773             default:
1774                 // Don't consume the event.
1775                 return super.onOptionsItemSelected(menuItem);
1776         }
1777     }
1778
1779     // removeAllCookies is deprecated, but it is required for API < 21.
1780     @Override
1781     public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
1782         // Get the menu item ID.
1783         int menuItemId = menuItem.getItemId();
1784
1785         // Get a handle for the shared preferences.
1786         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
1787
1788         // Run the commands that correspond to the selected menu item.
1789         switch (menuItemId) {
1790             case R.id.clear_and_exit:
1791                 // Clear and exit Privacy Browser.
1792                 clearAndExit();
1793                 break;
1794
1795             case R.id.home:
1796                 // Select the homepage based on the proxy through Orbot status.
1797                 if (proxyThroughOrbot) {
1798                     // Load the Tor homepage.
1799                     loadUrl(sharedPreferences.getString("tor_homepage", getString(R.string.tor_homepage_default_value)));
1800                 } else {
1801                     // Load the normal homepage.
1802                     loadUrl(sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
1803                 }
1804                 break;
1805
1806             case R.id.back:
1807                 if (currentWebView.canGoBack()) {
1808                     // Get the current web back forward list.
1809                     WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
1810
1811                     // Get the previous entry URL.
1812                     String previousUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() - 1).getUrl();
1813
1814                     // Reset the current domain name so that navigation works if third-party requests are blocked.
1815                     currentWebView.resetCurrentDomainName();
1816
1817                     // Apply the domain settings.
1818                     applyDomainSettings(currentWebView, previousUrl, false, false);
1819
1820                     // Load the previous website in the history.
1821                     currentWebView.goBack();
1822                 }
1823                 break;
1824
1825             case R.id.forward:
1826                 if (currentWebView.canGoForward()) {
1827                     // Get the current web back forward list.
1828                     WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
1829
1830                     // Get the next entry URL.
1831                     String nextUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() + 1).getUrl();
1832
1833                     // Reset the current domain name so that navigation works if third-party requests are blocked.
1834                     currentWebView.resetCurrentDomainName();
1835
1836                     // Apply the domain settings.
1837                     applyDomainSettings(currentWebView, nextUrl, false, false);
1838
1839                     // Load the next website in the history.
1840                     currentWebView.goForward();
1841                 }
1842                 break;
1843
1844             case R.id.history:
1845                 // Instantiate the URL history dialog.
1846                 DialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(currentWebView.getWebViewFragmentId());
1847
1848                 // Show the URL history dialog.
1849                 urlHistoryDialogFragment.show(getSupportFragmentManager(), getString(R.string.history));
1850                 break;
1851
1852             case R.id.requests:
1853                 // Populate the resource requests.
1854                 RequestsActivity.resourceRequests = currentWebView.getResourceRequests();
1855
1856                 // Create an intent to launch the Requests activity.
1857                 Intent requestsIntent = new Intent(this, RequestsActivity.class);
1858
1859                 // Add the block third-party requests status to the intent.
1860                 requestsIntent.putExtra("block_all_third_party_requests", currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
1861
1862                 // Make it so.
1863                 startActivity(requestsIntent);
1864                 break;
1865
1866             case R.id.downloads:
1867                 // Launch the system Download Manager.
1868                 Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
1869
1870                 // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
1871                 downloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1872
1873                 startActivity(downloadManagerIntent);
1874                 break;
1875
1876             case R.id.domains:
1877                 // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
1878                 reapplyDomainSettingsOnRestart = true;
1879
1880                 // Launch the domains activity.
1881                 Intent domainsIntent = new Intent(this, DomainsActivity.class);
1882
1883                 // Add the extra information to the intent.
1884                 domainsIntent.putExtra("current_url", currentWebView.getUrl());
1885
1886                 // Get the current certificate.
1887                 SslCertificate sslCertificate = currentWebView.getCertificate();
1888
1889                 // Check to see if the SSL certificate is populated.
1890                 if (sslCertificate != null) {
1891                     // Extract the certificate to strings.
1892                     String issuedToCName = sslCertificate.getIssuedTo().getCName();
1893                     String issuedToOName = sslCertificate.getIssuedTo().getOName();
1894                     String issuedToUName = sslCertificate.getIssuedTo().getUName();
1895                     String issuedByCName = sslCertificate.getIssuedBy().getCName();
1896                     String issuedByOName = sslCertificate.getIssuedBy().getOName();
1897                     String issuedByUName = sslCertificate.getIssuedBy().getUName();
1898                     long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
1899                     long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
1900
1901                     // Add the certificate to the intent.
1902                     domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
1903                     domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
1904                     domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
1905                     domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
1906                     domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
1907                     domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
1908                     domainsIntent.putExtra("ssl_start_date", startDateLong);
1909                     domainsIntent.putExtra("ssl_end_date", endDateLong);
1910                 }
1911
1912                 // Check to see if the current IP addresses have been received.
1913                 if (currentWebView.hasCurrentIpAddresses()) {
1914                     // Add the current IP addresses to the intent.
1915                     domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
1916                 }
1917
1918                 // Make it so.
1919                 startActivity(domainsIntent);
1920                 break;
1921
1922             case R.id.settings:
1923                 // Set the flag to reapply app settings on restart when returning from Settings.
1924                 reapplyAppSettingsOnRestart = true;
1925
1926                 // Set the flag to reapply the domain settings on restart when returning from Settings.
1927                 reapplyDomainSettingsOnRestart = true;
1928
1929                 // Launch the settings activity.
1930                 Intent settingsIntent = new Intent(this, SettingsActivity.class);
1931                 startActivity(settingsIntent);
1932                 break;
1933
1934             case R.id.import_export:
1935                 // Launch the import/export activity.
1936                 Intent importExportIntent = new Intent (this, ImportExportActivity.class);
1937                 startActivity(importExportIntent);
1938                 break;
1939
1940             case R.id.logcat:
1941                 // Launch the logcat activity.
1942                 Intent logcatIntent = new Intent(this, LogcatActivity.class);
1943                 startActivity(logcatIntent);
1944                 break;
1945
1946             case R.id.guide:
1947                 // Launch `GuideActivity`.
1948                 Intent guideIntent = new Intent(this, GuideActivity.class);
1949                 startActivity(guideIntent);
1950                 break;
1951
1952             case R.id.about:
1953                 // Create an intent to launch the about activity.
1954                 Intent aboutIntent = new Intent(this, AboutActivity.class);
1955
1956                 // Create a string array for the blocklist versions.
1957                 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],
1958                         ultraList.get(0).get(0)[0], ultraPrivacy.get(0).get(0)[0]};
1959
1960                 // Add the blocklist versions to the intent.
1961                 aboutIntent.putExtra("blocklist_versions", blocklistVersions);
1962
1963                 // Make it so.
1964                 startActivity(aboutIntent);
1965                 break;
1966         }
1967
1968         // Get a handle for the drawer layout.
1969         DrawerLayout drawerLayout = findViewById(R.id.drawerlayout);
1970
1971         // Close the navigation drawer.
1972         drawerLayout.closeDrawer(GravityCompat.START);
1973         return true;
1974     }
1975
1976     @Override
1977     public void onPostCreate(Bundle savedInstanceState) {
1978         // Run the default commands.
1979         super.onPostCreate(savedInstanceState);
1980
1981         // Sync the state of the DrawerToggle after the default `onRestoreInstanceState()` has finished.  This creates the navigation drawer icon.
1982         actionBarDrawerToggle.syncState();
1983     }
1984
1985     @Override
1986     public void onConfigurationChanged(Configuration newConfig) {
1987         // Run the default commands.
1988         super.onConfigurationChanged(newConfig);
1989
1990         // Get the status bar pixel size.
1991         int statusBarResourceId = getResources().getIdentifier("status_bar_height", "dimen", "android");
1992         int statusBarPixelSize = getResources().getDimensionPixelSize(statusBarResourceId);
1993
1994         // Get the resource density.
1995         float screenDensity = getResources().getDisplayMetrics().density;
1996
1997         // Recalculate the drawer header padding.
1998         drawerHeaderPaddingLeftAndRight = (int) (15 * screenDensity);
1999         drawerHeaderPaddingTop = statusBarPixelSize + (int) (4 * screenDensity);
2000         drawerHeaderPaddingBottom = (int) (8 * screenDensity);
2001
2002         // Reload the ad for the free flavor if not in full screen mode.
2003         if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
2004             // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
2005             AdHelper.loadAd(findViewById(R.id.adview), getApplicationContext(), getString(R.string.ad_unit_id));
2006         }
2007
2008         // `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:
2009         // https://code.google.com/p/android/issues/detail?id=20493#c8
2010         // ActivityCompat.invalidateOptionsMenu(this);
2011     }
2012
2013     @Override
2014     public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
2015         // Store the hit test result.
2016         final WebView.HitTestResult hitTestResult = currentWebView.getHitTestResult();
2017
2018         // Define the URL strings.
2019         final String imageUrl;
2020         final String linkUrl;
2021
2022         // Get handles for the system managers.
2023         final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
2024         FragmentManager fragmentManager = getSupportFragmentManager();
2025         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
2026
2027         // Remove the lint errors below that the clipboard manager might be null.
2028         assert clipboardManager != null;
2029
2030         // Process the link according to the type.
2031         switch (hitTestResult.getType()) {
2032             // `SRC_ANCHOR_TYPE` is a link.
2033             case WebView.HitTestResult.SRC_ANCHOR_TYPE:
2034                 // Get the target URL.
2035                 linkUrl = hitTestResult.getExtra();
2036
2037                 // Set the target URL as the title of the `ContextMenu`.
2038                 menu.setHeaderTitle(linkUrl);
2039
2040                 // Add an Open in New Tab entry.
2041                 menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2042                     // Load the link URL in a new tab.
2043                     addNewTab(linkUrl, false);
2044
2045                     // Consume the event.
2046                     return true;
2047                 });
2048
2049                 // Add an Open with App entry.
2050                 menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
2051                     openWithApp(linkUrl);
2052
2053                     // Consume the event.
2054                     return true;
2055                 });
2056
2057                 // Add an Open with Browser entry.
2058                 menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
2059                     openWithBrowser(linkUrl);
2060
2061                     // Consume the event.
2062                     return true;
2063                 });
2064
2065                 // Add a Copy URL entry.
2066                 menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
2067                     // Save the link URL in a `ClipData`.
2068                     ClipData srcAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), linkUrl);
2069
2070                     // Set the `ClipData` as the clipboard's primary clip.
2071                     clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
2072
2073                     // Consume the event.
2074                     return true;
2075                 });
2076
2077                 // Add a Download URL entry.
2078                 menu.add(R.string.download_url).setOnMenuItemClickListener((MenuItem item) -> {
2079                     // Check if the download should be processed by an external app.
2080                     if (sharedPreferences.getBoolean("download_with_external_app", false)) {  // Download with an external app.
2081                         openUrlWithExternalApp(linkUrl);
2082                     } else {  // Download with Android's download manager.
2083                         // Check to see if the storage permission has already been granted.
2084                         if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission needs to be requested.
2085                             // Store the variables for future use by `onRequestPermissionsResult()`.
2086                             downloadUrl = linkUrl;
2087                             downloadContentDisposition = "none";
2088                             downloadContentLength = -1;
2089
2090                             // Show a dialog if the user has previously denied the permission.
2091                             if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
2092                                 // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_FILE.
2093                                 DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_FILE);
2094
2095                                 // Show the download location permission alert dialog.  The permission will be requested when the the dialog is closed.
2096                                 downloadLocationPermissionDialogFragment.show(fragmentManager, getString(R.string.download_location));
2097                             } else {  // Show the permission request directly.
2098                                 // Request the permission.  The download dialog will be launched by `onRequestPermissionResult()`.
2099                                 ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
2100                             }
2101                         } else {  // The storage permission has already been granted.
2102                             // Get a handle for the download file alert dialog.
2103                             DialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(linkUrl, "none", -1);
2104
2105                             // Show the download file alert dialog.
2106                             downloadFileDialogFragment.show(fragmentManager, getString(R.string.download));
2107                         }
2108                     }
2109
2110                     // Consume the event.
2111                     return true;
2112                 });
2113
2114                 // Add a Cancel entry, which by default closes the context menu.
2115                 menu.add(R.string.cancel);
2116                 break;
2117
2118             case WebView.HitTestResult.EMAIL_TYPE:
2119                 // Get the target URL.
2120                 linkUrl = hitTestResult.getExtra();
2121
2122                 // Set the target URL as the title of the `ContextMenu`.
2123                 menu.setHeaderTitle(linkUrl);
2124
2125                 // Add a Write Email entry.
2126                 menu.add(R.string.write_email).setOnMenuItemClickListener(item -> {
2127                     // Use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
2128                     Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
2129
2130                     // Parse the url and set it as the data for the `Intent`.
2131                     emailIntent.setData(Uri.parse("mailto:" + linkUrl));
2132
2133                     // `FLAG_ACTIVITY_NEW_TASK` opens the email program in a new task instead as part of Privacy Browser.
2134                     emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
2135
2136                     // Make it so.
2137                     startActivity(emailIntent);
2138
2139                     // Consume the event.
2140                     return true;
2141                 });
2142
2143                 // Add a Copy Email Address entry.
2144                 menu.add(R.string.copy_email_address).setOnMenuItemClickListener(item -> {
2145                     // Save the email address in a `ClipData`.
2146                     ClipData srcEmailTypeClipData = ClipData.newPlainText(getString(R.string.email_address), linkUrl);
2147
2148                     // Set the `ClipData` as the clipboard's primary clip.
2149                     clipboardManager.setPrimaryClip(srcEmailTypeClipData);
2150
2151                     // Consume the event.
2152                     return true;
2153                 });
2154
2155                 // Add a `Cancel` entry, which by default closes the `ContextMenu`.
2156                 menu.add(R.string.cancel);
2157                 break;
2158
2159             // `IMAGE_TYPE` is an image.
2160             case WebView.HitTestResult.IMAGE_TYPE:
2161                 // Get the image URL.
2162                 imageUrl = hitTestResult.getExtra();
2163
2164                 // Set the image URL as the title of the context menu.
2165                 menu.setHeaderTitle(imageUrl);
2166
2167                 // Add an Open in New Tab entry.
2168                 menu.add(R.string.open_image_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2169                     // Load the image in a new tab.
2170                     addNewTab(imageUrl, false);
2171
2172                     // Consume the event.
2173                     return true;
2174                 });
2175
2176                 // Add a View Image entry.
2177                 menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
2178                     // Load the image in the current tab.
2179                     loadUrl(imageUrl);
2180
2181                     // Consume the event.
2182                     return true;
2183                 });
2184
2185                 // Add a Download Image entry.
2186                 menu.add(R.string.download_image).setOnMenuItemClickListener((MenuItem item) -> {
2187                     // Check if the download should be processed by an external app.
2188                     if (sharedPreferences.getBoolean("download_with_external_app", false)) {  // Download with an external app.
2189                         openUrlWithExternalApp(imageUrl);
2190                     } else {  // Download with Android's download manager.
2191                         // Check to see if the storage permission has already been granted.
2192                         if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission needs to be requested.
2193                             // Store the image URL for use by `onRequestPermissionResult()`.
2194                             downloadImageUrl = imageUrl;
2195
2196                             // Show a dialog if the user has previously denied the permission.
2197                             if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
2198                                 // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_IMAGE.
2199                                 DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_IMAGE);
2200
2201                                 // Show the download location permission alert dialog.  The permission will be requested when the dialog is closed.
2202                                 downloadLocationPermissionDialogFragment.show(fragmentManager, getString(R.string.download_location));
2203                             } else {  // Show the permission request directly.
2204                                 // Request the permission.  The download dialog will be launched by `onRequestPermissionResult()`.
2205                                 ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
2206                             }
2207                         } else {  // The storage permission has already been granted.
2208                             // Get a handle for the download image alert dialog.
2209                             DialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
2210
2211                             // Show the download image alert dialog.
2212                             downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
2213                         }
2214                     }
2215
2216                     // Consume the event.
2217                     return true;
2218                 });
2219
2220                 // Add a Copy URL entry.
2221                 menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
2222                     // Save the image URL in a clip data.
2223                     ClipData imageTypeClipData = ClipData.newPlainText(getString(R.string.url), imageUrl);
2224
2225                     // Set the clip data as the clipboard's primary clip.
2226                     clipboardManager.setPrimaryClip(imageTypeClipData);
2227
2228                     // Consume the event.
2229                     return true;
2230                 });
2231
2232                 // Add an Open with App entry.
2233                 menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
2234                     // Open the image URL with an external app.
2235                     openWithApp(imageUrl);
2236
2237                     // Consume the event.
2238                     return true;
2239                 });
2240
2241                 // Add an Open with Browser entry.
2242                 menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
2243                     // Open the image URL with an external browser.
2244                     openWithBrowser(imageUrl);
2245
2246                     // Consume the event.
2247                     return true;
2248                 });
2249
2250                 // Add a Cancel entry, which by default closes the context menu.
2251                 menu.add(R.string.cancel);
2252                 break;
2253
2254             // `SRC_IMAGE_ANCHOR_TYPE` is an image that is also a link.
2255             case WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE:
2256                 // Get the image URL.
2257                 imageUrl = hitTestResult.getExtra();
2258
2259                 // Instantiate a handler.
2260                 Handler handler = new Handler();
2261
2262                 // Get a message from the handler.
2263                 Message message = handler.obtainMessage();
2264
2265                 // Request the image details from the last touched node be returned in the message.
2266                 currentWebView.requestFocusNodeHref(message);
2267
2268                 // Get the link URL from the message data.
2269                 linkUrl = message.getData().getString("url");
2270
2271                 // Set the link URL as the title of the context menu.
2272                 menu.setHeaderTitle(linkUrl);
2273
2274                 // Add an Open in New Tab entry.
2275                 menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2276                     // Load the link URL in a new tab.
2277                     addNewTab(linkUrl, false);
2278
2279                     // Consume the event.
2280                     return true;
2281                 });
2282
2283                 // Add an Open Image in New Tab entry.
2284                 menu.add(R.string.open_image_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2285                     // Load the image in a new tab.
2286                     addNewTab(imageUrl, false);
2287
2288                     // Consume the event.
2289                     return true;
2290                 });
2291
2292                 // Add a View Image entry.
2293                 menu.add(R.string.view_image).setOnMenuItemClickListener((MenuItem item) -> {
2294                    // View the image in the current tab.
2295                    loadUrl(imageUrl);
2296
2297                    // Consume the event.
2298                    return true;
2299                 });
2300
2301                 // Add a Download Image entry.
2302                 menu.add(R.string.download_image).setOnMenuItemClickListener((MenuItem item) -> {
2303                     // Check if the download should be processed by an external app.
2304                     if (sharedPreferences.getBoolean("download_with_external_app", false)) {  // Download with an external app.
2305                         openUrlWithExternalApp(imageUrl);
2306                     } else {  // Download with Android's download manager.
2307                         // Check to see if the storage permission has already been granted.
2308                         if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {  // The storage permission needs to be requested.
2309                             // Store the image URL for use by `onRequestPermissionResult()`.
2310                             downloadImageUrl = imageUrl;
2311
2312                             // Show a dialog if the user has previously denied the permission.
2313                             if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
2314                                 // Instantiate the download location permission alert dialog and set the download type to DOWNLOAD_IMAGE.
2315                                 DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_IMAGE);
2316
2317                                 // Show the download location permission alert dialog.  The permission will be requested when the dialog is closed.
2318                                 downloadLocationPermissionDialogFragment.show(fragmentManager, getString(R.string.download_location));
2319                             } else {  // Show the permission request directly.
2320                                 // Request the permission.  The download dialog will be launched by `onRequestPermissionResult()`.
2321                                 ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
2322                             }
2323                         } else {  // The storage permission has already been granted.
2324                             // Get a handle for the download image alert dialog.
2325                             DialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
2326
2327                             // Show the download image alert dialog.
2328                             downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
2329                         }
2330                     }
2331
2332                     // Consume the event.
2333                     return true;
2334                 });
2335
2336                 // Add a Copy URL entry.
2337                 menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
2338                     // Save the link URL in a clip data.
2339                     ClipData srcImageAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), linkUrl);
2340
2341                     // Set the clip data as the clipboard's primary clip.
2342                     clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
2343
2344                     // Consume the event.
2345                     return true;
2346                 });
2347
2348                 // Add an Open with App entry.
2349                 menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
2350                     // Open the link URL with an external app.
2351                     openWithApp(linkUrl);
2352
2353                     // Consume the event.
2354                     return true;
2355                 });
2356
2357                 // Add an Open with Browser entry.
2358                 menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
2359                     // Open the link URL with an external browser.
2360                     openWithBrowser(linkUrl);
2361
2362                     // Consume the event.
2363                     return true;
2364                 });
2365
2366                 // Add a cancel entry, which by default closes the context menu.
2367                 menu.add(R.string.cancel);
2368                 break;
2369         }
2370     }
2371
2372     @Override
2373     public void onCreateBookmark(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
2374         // Get a handle for the bookmarks list view.
2375         ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
2376
2377         // Get the views from the dialog fragment.
2378         EditText createBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
2379         EditText createBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
2380
2381         // Extract the strings from the edit texts.
2382         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
2383         String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
2384
2385         // Create a favorite icon byte array output stream.
2386         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
2387
2388         // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2389         favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
2390
2391         // Convert the favorite icon byte array stream to a byte array.
2392         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
2393
2394         // Display the new bookmark below the current items in the (0 indexed) list.
2395         int newBookmarkDisplayOrder = bookmarksListView.getCount();
2396
2397         // Create the bookmark.
2398         bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
2399
2400         // Update the bookmarks cursor with the current contents of this folder.
2401         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
2402
2403         // Update the list view.
2404         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
2405
2406         // Scroll to the new bookmark.
2407         bookmarksListView.setSelection(newBookmarkDisplayOrder);
2408     }
2409
2410     @Override
2411     public void onCreateBookmarkFolder(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
2412         // Get a handle for the bookmarks list view.
2413         ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
2414
2415         // Get handles for the views in the dialog fragment.
2416         EditText createFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.create_folder_name_edittext);
2417         RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon_radiobutton);
2418         ImageView folderIconImageView = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon);
2419
2420         // Get new folder name string.
2421         String folderNameString = createFolderNameEditText.getText().toString();
2422
2423         // Create a folder icon bitmap.
2424         Bitmap folderIconBitmap;
2425
2426         // Set the folder icon bitmap according to the dialog.
2427         if (defaultFolderIconRadioButton.isChecked()) {  // Use the default folder icon.
2428             // Get the default folder icon drawable.
2429             Drawable folderIconDrawable = folderIconImageView.getDrawable();
2430
2431             // Convert the folder icon drawable to a bitmap drawable.
2432             BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
2433
2434             // Convert the folder icon bitmap drawable to a bitmap.
2435             folderIconBitmap = folderIconBitmapDrawable.getBitmap();
2436         } else {  // Use the WebView favorite icon.
2437             // Copy the favorite icon bitmap to the folder icon bitmap.
2438             folderIconBitmap = favoriteIconBitmap;
2439         }
2440
2441         // Create a folder icon byte array output stream.
2442         ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
2443
2444         // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2445         folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
2446
2447         // Convert the folder icon byte array stream to a byte array.
2448         byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
2449
2450         // Move all the bookmarks down one in the display order.
2451         for (int i = 0; i < bookmarksListView.getCount(); i++) {
2452             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
2453             bookmarksDatabaseHelper.updateDisplayOrder(databaseId, i + 1);
2454         }
2455
2456         // Create the folder, which will be placed at the top of the `ListView`.
2457         bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
2458
2459         // Update the bookmarks cursor with the current contents of this folder.
2460         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
2461
2462         // Update the `ListView`.
2463         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
2464
2465         // Scroll to the new folder.
2466         bookmarksListView.setSelection(0);
2467     }
2468
2469     @Override
2470     public void onSaveBookmark(DialogFragment dialogFragment, int selectedBookmarkDatabaseId, Bitmap favoriteIconBitmap) {
2471         // Get handles for the views from `dialogFragment`.
2472         EditText editBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
2473         EditText editBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
2474         RadioButton currentBookmarkIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
2475
2476         // Store the bookmark strings.
2477         String bookmarkNameString = editBookmarkNameEditText.getText().toString();
2478         String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
2479
2480         // Update the bookmark.
2481         if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
2482             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
2483         } else {  // Update the bookmark using the `WebView` favorite icon.
2484             // Create a favorite icon byte array output stream.
2485             ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
2486
2487             // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2488             favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
2489
2490             // Convert the favorite icon byte array stream to a byte array.
2491             byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
2492
2493             //  Update the bookmark and the favorite icon.
2494             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
2495         }
2496
2497         // Update the bookmarks cursor with the current contents of this folder.
2498         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
2499
2500         // Update the list view.
2501         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
2502     }
2503
2504     @Override
2505     public void onSaveBookmarkFolder(DialogFragment dialogFragment, int selectedFolderDatabaseId, Bitmap favoriteIconBitmap) {
2506         // Get handles for the views from `dialogFragment`.
2507         EditText editFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
2508         RadioButton currentFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
2509         RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
2510         ImageView defaultFolderIconImageView = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_imageview);
2511
2512         // Get the new folder name.
2513         String newFolderNameString = editFolderNameEditText.getText().toString();
2514
2515         // Check if the favorite icon has changed.
2516         if (currentFolderIconRadioButton.isChecked()) {  // Only the name has changed.
2517             // Update the name in the database.
2518             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
2519         } else if (!currentFolderIconRadioButton.isChecked() && newFolderNameString.equals(oldFolderNameString)) {  // Only the icon has changed.
2520             // Create the new folder icon Bitmap.
2521             Bitmap folderIconBitmap;
2522
2523             // Populate the new folder icon bitmap.
2524             if (defaultFolderIconRadioButton.isChecked()) {
2525                 // Get the default folder icon drawable.
2526                 Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
2527
2528                 // Convert the folder icon drawable to a bitmap drawable.
2529                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
2530
2531                 // Convert the folder icon bitmap drawable to a bitmap.
2532                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
2533             } else {  // Use the `WebView` favorite icon.
2534                 // Copy the favorite icon bitmap to the folder icon bitmap.
2535                 folderIconBitmap = favoriteIconBitmap;
2536             }
2537
2538             // Create a folder icon byte array output stream.
2539             ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
2540
2541             // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2542             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
2543
2544             // Convert the folder icon byte array stream to a byte array.
2545             byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
2546
2547             // Update the folder icon in the database.
2548             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, newFolderIconByteArray);
2549         } else {  // The folder icon and the name have changed.
2550             // Get the new folder icon `Bitmap`.
2551             Bitmap folderIconBitmap;
2552             if (defaultFolderIconRadioButton.isChecked()) {
2553                 // Get the default folder icon drawable.
2554                 Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
2555
2556                 // Convert the folder icon drawable to a bitmap drawable.
2557                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
2558
2559                 // Convert the folder icon bitmap drawable to a bitmap.
2560                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
2561             } else {  // Use the `WebView` favorite icon.
2562                 // Copy the favorite icon bitmap to the folder icon bitmap.
2563                 folderIconBitmap = favoriteIconBitmap;
2564             }
2565
2566             // Create a folder icon byte array output stream.
2567             ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
2568
2569             // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2570             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
2571
2572             // Convert the folder icon byte array stream to a byte array.
2573             byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
2574
2575             // Update the folder name and icon in the database.
2576             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, newFolderIconByteArray);
2577         }
2578
2579         // Update the bookmarks cursor with the current contents of this folder.
2580         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
2581
2582         // Update the `ListView`.
2583         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
2584     }
2585
2586     @Override
2587     public void onCloseDownloadLocationPermissionDialog(int downloadType) {
2588         switch (downloadType) {
2589             case DownloadLocationPermissionDialog.DOWNLOAD_FILE:
2590                 // Request the WRITE_EXTERNAL_STORAGE permission with a file request code.
2591                 ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
2592                 break;
2593
2594             case DownloadLocationPermissionDialog.DOWNLOAD_IMAGE:
2595                 // Request the WRITE_EXTERNAL_STORAGE permission with an image request code.
2596                 ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
2597                 break;
2598         }
2599     }
2600
2601     @Override
2602     public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
2603         // Get a handle for the fragment manager.
2604         FragmentManager fragmentManager = getSupportFragmentManager();
2605
2606         switch (requestCode) {
2607             case DOWNLOAD_FILE_REQUEST_CODE:
2608                 // Show the download file alert dialog.  When the dialog closes, the correct command will be used based on the permission status.
2609                 DialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(downloadUrl, downloadContentDisposition, downloadContentLength);
2610
2611                 // On API 23, displaying the fragment must be delayed or the app will crash.
2612                 if (Build.VERSION.SDK_INT == 23) {
2613                     new Handler().postDelayed(() -> downloadFileDialogFragment.show(fragmentManager, getString(R.string.download)), 500);
2614                 } else {
2615                     downloadFileDialogFragment.show(fragmentManager, getString(R.string.download));
2616                 }
2617
2618                 // Reset the download variables.
2619                 downloadUrl = "";
2620                 downloadContentDisposition = "";
2621                 downloadContentLength = 0;
2622                 break;
2623
2624             case DOWNLOAD_IMAGE_REQUEST_CODE:
2625                 // Show the download image alert dialog.  When the dialog closes, the correct command will be used based on the permission status.
2626                 DialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(downloadImageUrl);
2627
2628                 // On API 23, displaying the fragment must be delayed or the app will crash.
2629                 if (Build.VERSION.SDK_INT == 23) {
2630                     new Handler().postDelayed(() -> downloadImageDialogFragment.show(fragmentManager, getString(R.string.download)), 500);
2631                 } else {
2632                     downloadImageDialogFragment.show(fragmentManager, getString(R.string.download));
2633                 }
2634
2635                 // Reset the image URL variable.
2636                 downloadImageUrl = "";
2637                 break;
2638