Request Orbot to connect on every restart. https://redmine.stoutner.com/issues/262
[PrivacyBrowser.git] / app / src / main / java / com / stoutner / privacybrowser / activities / MainWebViewActivity.java
1 /*
2  * Copyright © 2015-2018 Soren Stoutner <soren@stoutner.com>.
3  *
4  * Download cookie code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
5  *
6  * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
7  *
8  * Privacy Browser is free software: you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation, either version 3 of the License, or
11  * (at your option) any later version.
12  *
13  * Privacy Browser is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
20  */
21
22 package com.stoutner.privacybrowser.activities;
23
24 import android.Manifest;
25 import android.annotation.SuppressLint;
26 import android.app.DialogFragment;
27 import android.app.DownloadManager;
28 import android.content.ActivityNotFoundException;
29 import android.content.BroadcastReceiver;
30 import android.content.ClipData;
31 import android.content.ClipboardManager;
32 import android.content.Context;
33 import android.content.Intent;
34 import android.content.IntentFilter;
35 import android.content.SharedPreferences;
36 import android.content.pm.PackageManager;
37 import android.content.res.Configuration;
38 import android.database.Cursor;
39 import android.graphics.Bitmap;
40 import android.graphics.BitmapFactory;
41 import android.graphics.Typeface;
42 import android.graphics.drawable.BitmapDrawable;
43 import android.graphics.drawable.Drawable;
44 import android.net.Uri;
45 import android.net.http.SslCertificate;
46 import android.net.http.SslError;
47 import android.os.Build;
48 import android.os.Bundle;
49 import android.os.Environment;
50 import android.os.Handler;
51 import android.preference.PreferenceManager;
52 import android.print.PrintDocumentAdapter;
53 import android.print.PrintManager;
54 import android.support.annotation.NonNull;
55 import android.support.design.widget.CoordinatorLayout;
56 import android.support.design.widget.FloatingActionButton;
57 import android.support.design.widget.NavigationView;
58 import android.support.design.widget.Snackbar;
59 import android.support.v4.app.ActivityCompat;
60 import android.support.v4.content.ContextCompat;
61 // `ShortcutInfoCompat`, `ShortcutManagerCompat`, and `IconCompat` can be switched to the non-compat version once API >= 26.
62 import android.support.v4.content.pm.ShortcutInfoCompat;
63 import android.support.v4.content.pm.ShortcutManagerCompat;
64 import android.support.v4.graphics.drawable.IconCompat;
65 import android.support.v4.view.GravityCompat;
66 import android.support.v4.widget.DrawerLayout;
67 import android.support.v4.widget.SwipeRefreshLayout;
68 import android.support.v7.app.ActionBar;
69 import android.support.v7.app.ActionBarDrawerToggle;
70 import android.support.v7.app.AppCompatActivity;
71 import android.support.v7.app.AppCompatDialogFragment;
72 import android.support.v7.widget.Toolbar;
73 import android.text.Editable;
74 import android.text.Spanned;
75 import android.text.TextWatcher;
76 import android.text.style.ForegroundColorSpan;
77 import android.util.Patterns;
78 import android.view.ContextMenu;
79 import android.view.GestureDetector;
80 import android.view.KeyEvent;
81 import android.view.Menu;
82 import android.view.MenuItem;
83 import android.view.MotionEvent;
84 import android.view.View;
85 import android.view.ViewGroup;
86 import android.view.WindowManager;
87 import android.view.inputmethod.InputMethodManager;
88 import android.webkit.CookieManager;
89 import android.webkit.HttpAuthHandler;
90 import android.webkit.SslErrorHandler;
91 import android.webkit.WebBackForwardList;
92 import android.webkit.WebChromeClient;
93 import android.webkit.WebResourceResponse;
94 import android.webkit.WebStorage;
95 import android.webkit.WebView;
96 import android.webkit.WebViewClient;
97 import android.webkit.WebViewDatabase;
98 import android.widget.CursorAdapter;
99 import android.widget.EditText;
100 import android.widget.FrameLayout;
101 import android.widget.ImageView;
102 import android.widget.LinearLayout;
103 import android.widget.ListView;
104 import android.widget.ProgressBar;
105 import android.widget.RadioButton;
106 import android.widget.RelativeLayout;
107 import android.widget.TextView;
108
109 import com.stoutner.privacybrowser.BannerAd;
110 import com.stoutner.privacybrowser.BuildConfig;
111 import com.stoutner.privacybrowser.R;
112 import com.stoutner.privacybrowser.dialogs.AddDomainDialog;
113 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
114 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
115 import com.stoutner.privacybrowser.dialogs.CreateHomeScreenShortcutDialog;
116 import com.stoutner.privacybrowser.dialogs.DownloadImageDialog;
117 import com.stoutner.privacybrowser.dialogs.DownloadLocationPermissionDialog;
118 import com.stoutner.privacybrowser.dialogs.EditBookmarkDialog;
119 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
120 import com.stoutner.privacybrowser.dialogs.HttpAuthenticationDialog;
121 import com.stoutner.privacybrowser.dialogs.PinnedSslCertificateMismatchDialog;
122 import com.stoutner.privacybrowser.dialogs.UrlHistoryDialog;
123 import com.stoutner.privacybrowser.dialogs.ViewSslCertificateDialog;
124 import com.stoutner.privacybrowser.helpers.BlockListHelper;
125 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
126 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
127 import com.stoutner.privacybrowser.helpers.OrbotProxyHelper;
128 import com.stoutner.privacybrowser.dialogs.DownloadFileDialog;
129 import com.stoutner.privacybrowser.dialogs.SslCertificateErrorDialog;
130
131 import java.io.ByteArrayInputStream;
132 import java.io.ByteArrayOutputStream;
133 import java.io.File;
134 import java.io.IOException;
135 import java.io.UnsupportedEncodingException;
136 import java.net.MalformedURLException;
137 import java.net.URL;
138 import java.net.URLDecoder;
139 import java.net.URLEncoder;
140 import java.util.ArrayList;
141 import java.util.Date;
142 import java.util.HashMap;
143 import java.util.HashSet;
144 import java.util.List;
145 import java.util.Map;
146 import java.util.Set;
147
148 // AppCompatActivity from android.support.v7.app.AppCompatActivity must be used to have access to the SupportActionBar until the minimum API is >= 21.
149 public class MainWebViewActivity extends AppCompatActivity implements AddDomainDialog.AddDomainListener, CreateBookmarkDialog.CreateBookmarkListener,
150         CreateBookmarkFolderDialog.CreateBookmarkFolderListener, CreateHomeScreenShortcutDialog.CreateHomeScreenSchortcutListener, DownloadFileDialog.DownloadFileListener,
151         DownloadImageDialog.DownloadImageListener, DownloadLocationPermissionDialog.DownloadLocationPermissionDialogListener, EditBookmarkDialog.EditBookmarkListener,
152         EditBookmarkFolderDialog.EditBookmarkFolderListener, HttpAuthenticationDialog.HttpAuthenticationListener, NavigationView.OnNavigationItemSelectedListener,
153         PinnedSslCertificateMismatchDialog.PinnedSslCertificateMismatchListener, SslCertificateErrorDialog.SslCertificateErrorListener, UrlHistoryDialog.UrlHistoryListener {
154
155     // `darkTheme` is public static so it can be accessed from `AboutActivity`, `GuideActivity`, `AddDomainDialog`, `SettingsActivity`, `DomainsActivity`, `DomainsListFragment`, `BookmarksActivity`,
156     // `BookmarksDatabaseViewActivity`, `CreateBookmarkDialog`, `CreateBookmarkFolderDialog`, `DownloadFileDialog`, `DownloadImageDialog`, `EditBookmarkDialog`, `EditBookmarkFolderDialog`,
157     // `EditBookmarkDatabaseViewDialog`, `HttpAuthenticationDialog`, `MoveToFolderDialog`, `SslCertificateErrorDialog`, `UrlHistoryDialog`, `ViewSslCertificateDialog`, `CreateHomeScreenShortcutDialog`,
158     //  and `OrbotProxyHelper`. It is also used in `onCreate()`, `applyAppSettings()`, `applyDomainSettings()`, and `updatePrivacyIcons()`.
159     public static boolean darkTheme;
160
161     // `favoriteIconBitmap` is public static so it can be accessed from `CreateHomeScreenShortcutDialog`, `BookmarksActivity`, `BookmarksDatabaseViewActivity`, `CreateBookmarkDialog`,
162     // `CreateBookmarkFolderDialog`, `EditBookmarkDialog`, `EditBookmarkFolderDialog`, `EditBookmarkDatabaseViewDialog`, and `ViewSslCertificateDialog`.  It is also used in `onCreate()`,
163     // `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onCreateHomeScreenShortcutCreate()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `applyDomainSettings()`.
164     public static Bitmap favoriteIconBitmap;
165
166     // `formattedUrlString` is public static so it can be accessed from `BookmarksActivity`, `CreateBookmarkDialog`, and `AddDomainDialog`.
167     // It is also used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onCreateHomeScreenShortcutCreate()`, and `loadUrlFromTextBox()`.
168     public static String formattedUrlString;
169
170     // `sslCertificate` is public static so it can be accessed from `DomainsActivity`, `DomainsListFragment`, `DomainSettingsFragment`, `PinnedSslCertificateMismatchDialog`,
171     // and `ViewSslCertificateDialog`.  It is also used in `onCreate()`.
172     public static SslCertificate sslCertificate;
173
174     // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()`.
175     public static String orbotStatus;
176
177     // `webViewTitle` is public static so it can be accessed from `CreateBookmarkDialog` and `CreateHomeScreenShortcutDialog`.  It is also used in `onCreate()`.
178     public static String webViewTitle;
179
180     // `appliedUserAgentString` is public static so it can be accessed from `ViewSourceActivity`.  It is also used in `applyDomainSettings()`.
181     public static String appliedUserAgentString;
182
183     // `reloadOnRestart` is public static so it can be accessed from `SettingsFragment`.  It is also used in `onRestart()`
184     public static boolean reloadOnRestart;
185
186     // `reloadUrlOnRestart` is public static so it can be accessed from `SettingsFragment`.  It is also used in `onRestart()`.
187     public static boolean loadUrlOnRestart;
188
189     // `restartFromBookmarksActivity` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onRestart()`.
190     public static boolean restartFromBookmarksActivity;
191
192     // The block list versions are public static so they can be accessed from `AboutTabFragment`.  They are also used in `onCreate()`.
193     public static String easyListVersion;
194     public static String easyPrivacyVersion;
195     public static String fanboyAnnoyanceVersion;
196     public static String fanboySocialVersion;
197
198     // `currentBookmarksFolder` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onCreate()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`,
199     // `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
200     public static String currentBookmarksFolder;
201
202     // `domainSettingsDatabaseId` is public static so it can be accessed from `PinnedSslCertificateMismatchDialog`.  It is also used in `onCreate()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
203     public static int domainSettingsDatabaseId;
204
205     // The pinned domain SSL Certificate variables are public static so they can be accessed from `PinnedSslCertificateMismatchDialog`.  They are also used in `onCreate()` and `applyDomainSettings()`.
206     public static String pinnedDomainSslIssuedToCNameString;
207     public static String pinnedDomainSslIssuedToONameString;
208     public static String pinnedDomainSslIssuedToUNameString;
209     public static String pinnedDomainSslIssuedByCNameString;
210     public static String pinnedDomainSslIssuedByONameString;
211     public static String pinnedDomainSslIssuedByUNameString;
212     public static Date pinnedDomainSslStartDate;
213     public static Date pinnedDomainSslEndDate;
214
215
216     // `appBar` is used in `onCreate()`, `onOptionsItemSelected()`, `closeFindOnPage()`, and `applyAppSettings()`.
217     private ActionBar appBar;
218
219     // `navigatingHistory` is used in `onCreate()`, `onNavigationItemSelected()`, `onSslMismatchBack()`, and `applyDomainSettings()`.
220     private boolean navigatingHistory;
221
222     // `favoriteIconDefaultBitmap` is used in `onCreate()` and `applyDomainSettings`.
223     private Bitmap favoriteIconDefaultBitmap;
224
225     // `drawerLayout` is used in `onCreate()`, `onNewIntent()`, `onBackPressed()`, and `onRestart()`.
226     private DrawerLayout drawerLayout;
227
228     // `rootCoordinatorLayout` is used in `onCreate()` and `applyAppSettings()`.
229     private CoordinatorLayout rootCoordinatorLayout;
230
231     // `mainWebView` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`,
232     // `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`, `onSslMismatchBack()`, and `setDisplayWebpageImages()`.
233     private WebView mainWebView;
234
235     // `fullScreenVideoFrameLayout` is used in `onCreate()` and `onConfigurationChanged()`.
236     private FrameLayout fullScreenVideoFrameLayout;
237
238     // `swipeRefreshLayout` is used in `onCreate()`, `onPrepareOptionsMenu`, and `onRestart()`.
239     private SwipeRefreshLayout swipeRefreshLayout;
240
241     // `urlAppBarRelativeLayout` is used in `onCreate()` and `applyDomainSettings()`.
242     private RelativeLayout urlAppBarRelativeLayout;
243
244     // `favoriteIconImageView` is used in `onCreate()` and `applyDomainSettings()`
245     private ImageView favoriteIconImageView;
246
247     // `cookieManager` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`, `loadUrlFromTextBox()`, `onDownloadImage()`, `onDownloadFile()`, and `onRestart()`.
248     private CookieManager cookieManager;
249
250     // `customHeader` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateContextMenu()`, and `loadUrl()`.
251     private final Map<String, String> customHeaders = new HashMap<>();
252
253     // `javaScriptEnabled` is also used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `applyDomainSettings()`, and `updatePrivacyIcons()`.
254     private boolean javaScriptEnabled;
255
256     // `firstPartyCookiesEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onDownloadImage()`, `onDownloadFile()`, and `applyDomainSettings()`.
257     private boolean firstPartyCookiesEnabled;
258
259     // `thirdPartyCookiesEnabled` used in `onCreate()`, `onPrepareOptionsMenu()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
260     private boolean thirdPartyCookiesEnabled;
261
262     // `domStorageEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
263     private boolean domStorageEnabled;
264
265     // `saveFormDataEnabled` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyDomainSettings()`.
266     private boolean saveFormDataEnabled;
267
268     // `nightMode` is used in `onCreate()` and  `applyDomainSettings()`.
269     private boolean nightMode;
270
271     // `swipeToRefreshEnabled` is used in `onPrepareOptionsMenu()` and `applyAppSettings()`.
272     private boolean swipeToRefreshEnabled;
273
274     // `displayWebpageImagesBoolean` is used in `applyAppSettings()` and `applyDomainSettings()`.
275     private boolean displayWebpageImagesBoolean;
276
277     // 'homepage' is used in `onCreate()`, `onNavigationItemSelected()`, and `applyAppSettings()`.
278     private String homepage;
279
280     // `searchURL` is used in `loadURLFromTextBox()` and `applyAppSettings()`.
281     private String searchURL;
282
283     // The block list variables are used in `onCreate()` and `applyAppSettings()`.
284     private boolean easyListEnabled;
285     private boolean easyPrivacyEnabled;
286     private boolean fanboysAnnoyanceListEnabled;
287     private boolean fanboysSocialBlockingListEnabled;
288
289     // `privacyBrowserRuntime` is used in `onCreate()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
290     private Runtime privacyBrowserRuntime;
291
292     // `proxyThroughOrbot` is used in `onRestart()` and `applyAppSettings()`.
293     boolean proxyThroughOrbot;
294
295     // `incognitoModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
296     private boolean incognitoModeEnabled;
297
298     // `fullScreenBrowsingModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
299     private boolean fullScreenBrowsingModeEnabled;
300
301     // `inFullScreenBrowsingMode` is used in `onCreate()`, `onConfigurationChanged()`, and `applyAppSettings()`.
302     private boolean inFullScreenBrowsingMode;
303
304     // `hideSystemBarsOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
305     private boolean hideSystemBarsOnFullscreen;
306
307     // `translucentNavigationBarOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
308     private boolean translucentNavigationBarOnFullscreen;
309
310     // `reapplyDomainSettingsOnRestart` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, and `onAddDomain()`, .
311     private boolean reapplyDomainSettingsOnRestart;
312
313     // `reapplyAppSettingsOnRestart` is used in `onNavigationItemSelected()` and `onRestart()`.
314     private boolean reapplyAppSettingsOnRestart;
315
316     // `currentDomainName` is used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onAddDomain()`, and `applyDomainSettings()`.
317     private String currentDomainName;
318
319     // `ignorePinnedSslCertificateForDomain` is used in `onCreate()`, `onSslMismatchProceed()`, and `applyDomainSettings()`.
320     private boolean ignorePinnedSslCertificate;
321
322     // `waitingForOrbot` is used in `onCreate()` and `applyAppSettings()`.
323     private boolean waitingForOrbot;
324
325     // `domainSettingsApplied` is used in `prepareOptionsMenu()`, `applyDomainSettings()`, and `setDisplayWebpageImages()`.
326     private boolean domainSettingsApplied;
327
328     // `displayWebpageImagesInt` is used in `applyDomainSettings()` and `setDisplayWebpageImages()`.
329     private int displayWebpageImagesInt;
330
331     // `onTheFlyDisplayImagesSet` is used in `applyDomainSettings()` and `setDisplayWebpageImages()`.
332     private boolean onTheFlyDisplayImagesSet;
333
334     // `waitingForOrbotData` is used in `onCreate()` and `applyAppSettings()`.
335     private String waitingForOrbotHTMLString;
336
337     // `privateDataDirectoryString` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`.
338     private String privateDataDirectoryString;
339
340     // `findOnPageLinearLayout` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
341     private LinearLayout findOnPageLinearLayout;
342
343     // `findOnPageEditText` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
344     private EditText findOnPageEditText;
345
346     // `mainMenu` is used in `onCreateOptionsMenu()` and `updatePrivacyIcons()`.
347     private Menu mainMenu;
348
349     // `drawerToggle` is used in `onCreate()`, `onPostCreate()`, `onConfigurationChanged()`, `onNewIntent()`, and `onNavigationItemSelected()`.
350     private ActionBarDrawerToggle drawerToggle;
351
352     // `supportAppBar` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
353     private Toolbar supportAppBar;
354
355     // `urlTextBox` is used in `onCreate()`, `onOptionsItemSelected()`, `loadUrlFromTextBox()`, `loadUrl()`, and `highlightUrlText()`.
356     private EditText urlTextBox;
357
358     // The color spans are used in `onCreate()` and `highlightUrlText()`.
359     private ForegroundColorSpan redColorSpan;
360     private ForegroundColorSpan initialGrayColorSpan;
361     private ForegroundColorSpan finalGrayColorSpan;
362
363     // `adView` is used in `onCreate()` and `onConfigurationChanged()`.
364     private View adView;
365
366     // `sslErrorHandler` is used in `onCreate()`, `onSslErrorCancel()`, and `onSslErrorProceed`.
367     private SslErrorHandler sslErrorHandler;
368
369     // `httpAuthHandler` is used in `onCreate()`, `onHttpAuthenticationCancel()`, and `onHttpAuthenticationProceed()`.
370     private static HttpAuthHandler httpAuthHandler;
371
372     // `inputMethodManager` is used in `onOptionsItemSelected()`, `loadUrlFromTextBox()`, and `closeFindOnPage()`.
373     private InputMethodManager inputMethodManager;
374
375     // `mainWebViewRelativeLayout` is used in `onCreate()` and `onNavigationItemSelected()`.
376     private RelativeLayout mainWebViewRelativeLayout;
377
378     // `urlIsLoading` is used in `onCreate()`, `loadUrl()`, and `applyDomainSettings()`.
379     private boolean urlIsLoading;
380
381     // `pinnedDomainSslCertificate` is used in `onCreate()` and `applyDomainSettings()`.
382     private boolean pinnedDomainSslCertificate;
383
384     // `bookmarksDatabaseHelper` is used in `onCreate()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
385     private BookmarksDatabaseHelper bookmarksDatabaseHelper;
386
387     // `bookmarksListView` is used in `onCreate()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, and `loadBookmarksFolder()`.
388     private ListView bookmarksListView;
389
390     // `bookmarksTitleTextView` is used in `onCreate()` and `loadBookmarksFolder()`.
391     private TextView bookmarksTitleTextView;
392
393     // `bookmarksCursor` is used in `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
394     private Cursor bookmarksCursor;
395
396     // `bookmarksCursorAdapter` is used in `onCreateBookmark()`, `onCreateBookmarkFolder()` `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
397     private CursorAdapter bookmarksCursorAdapter;
398
399     // `oldFolderNameString` is used in `onCreate()` and `onSaveEditBookmarkFolder()`.
400     private String oldFolderNameString;
401
402     // The download strings are used in `onCreate()` and `onRequestPermissionResult()`.
403     private String downloadUrl;
404     private String downloadContentDisposition;
405     private long downloadContentLength;
406
407     // `downloadImageUrl` is used in `onCreateContextMenu()` and `onRequestPermissionResult()`.
408     private String downloadImageUrl;
409
410     // The request codes are used in `onCreate()`, `onCreateContextMenu()`, `onCloseDownloadLocationPermissionDialog()`, and `onRequestPermissionResult()`.
411     private final int DOWNLOAD_FILE_REQUEST_CODE = 1;
412     private final int DOWNLOAD_IMAGE_REQUEST_CODE = 2;
413
414     @Override
415     // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.  The whole premise of Privacy Browser is built around an understanding of these dangers.
416     // Also, remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
417     @SuppressLint({"SetJavaScriptEnabled", "ClickableViewAccessibility"})
418     // Remove Android Studio's warning about deprecations.  We have to use the deprecated `getColor()` until API >= 23.
419     @SuppressWarnings("deprecation")
420     protected void onCreate(Bundle savedInstanceState) {
421         // Get a handle for `sharedPreferences`.  `this` references the current context.
422         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
423
424         // Get the theme preference.
425         darkTheme = sharedPreferences.getBoolean("dark_theme", false);
426
427         // Set the activity theme.
428         if (darkTheme) {
429             setTheme(R.style.PrivacyBrowserDark);
430         } else {
431             setTheme(R.style.PrivacyBrowserLight);
432         }
433
434         // Run the default commands.
435         super.onCreate(savedInstanceState);
436
437         // Set the content view.
438         setContentView(R.layout.main_drawerlayout);
439
440         // Get a handle for `inputMethodManager`.
441         inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
442
443         // `SupportActionBar` from `android.support.v7.app.ActionBar` must be used until the minimum API is >= 21.
444         supportAppBar = findViewById(R.id.app_bar);
445         setSupportActionBar(supportAppBar);
446         appBar = getSupportActionBar();
447
448         // This is needed to get rid of the Android Studio warning that `appBar` might be null.
449         assert appBar != null;
450
451         // Add the custom `url_app_bar` layout, which shows the favorite icon and the URL text bar.
452         appBar.setCustomView(R.layout.url_app_bar);
453         appBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
454
455         // Initialize the foreground color spans for highlighting the URLs.  We have to use the deprecated `getColor()` until API >= 23.
456         redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_a700));
457         initialGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
458         finalGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
459
460         // Get a handle for `urlTextBox`.
461         urlTextBox = findViewById(R.id.url_edittext);
462
463         // Remove the formatting from `urlTextBar` when the user is editing the text.
464         urlTextBox.setOnFocusChangeListener((View v, boolean hasFocus) -> {
465             if (hasFocus) {  // The user is editing `urlTextBox`.
466                 // Remove the highlighting.
467                 urlTextBox.getText().removeSpan(redColorSpan);
468                 urlTextBox.getText().removeSpan(initialGrayColorSpan);
469                 urlTextBox.getText().removeSpan(finalGrayColorSpan);
470             } else {  // The user has stopped editing `urlTextBox`.
471                 // Reapply the highlighting.
472                 highlightUrlText();
473             }
474         });
475
476         // Set the go button on the keyboard to load the URL in `urlTextBox`.
477         urlTextBox.setOnKeyListener((View v, int keyCode, KeyEvent event) -> {
478             // If the event is a key-down event on the `enter` button, load the URL.
479             if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {
480                 // Load the URL into the mainWebView and consume the event.
481                 try {
482                     loadUrlFromTextBox();
483                 } catch (UnsupportedEncodingException e) {
484                     e.printStackTrace();
485                 }
486                 // If the enter key was pressed, consume the event.
487                 return true;
488             } else {
489                 // If any other key was pressed, do not consume the event.
490                 return false;
491             }
492         });
493
494         // Set `waitingForOrbotHTMLString`.
495         waitingForOrbotHTMLString = "<html><body><br/><center><h1>" + getString(R.string.waiting_for_orbot) + "</h1></center></body></html>";
496
497         // Initialize `currentDomainName`, `orbotStatus`, and `waitingForOrbot`.
498         currentDomainName = "";
499         orbotStatus = "unknown";
500         waitingForOrbot = false;
501
502         // Create an Orbot status `BroadcastReceiver`.
503         BroadcastReceiver orbotStatusBroadcastReceiver = new BroadcastReceiver() {
504             @Override
505             public void onReceive(Context context, Intent intent) {
506                 // Store the content of the status message in `orbotStatus`.
507                 orbotStatus = intent.getStringExtra("org.torproject.android.intent.extra.STATUS");
508
509                 // If we are waiting on Orbot, load the website now that Orbot is connected.
510                 if (orbotStatus.equals("ON") && waitingForOrbot) {
511                     // Reset `waitingForOrbot`.
512                     waitingForOrbot = false;
513
514                     // Load `formattedUrlString
515                     loadUrl(formattedUrlString);
516                 }
517             }
518         };
519
520         // Register `orbotStatusBroadcastReceiver` on `this` context.
521         this.registerReceiver(orbotStatusBroadcastReceiver, new IntentFilter("org.torproject.android.intent.action.STATUS"));
522
523         // Get handles for views that need to be accessed.
524         drawerLayout = findViewById(R.id.drawerlayout);
525         rootCoordinatorLayout = findViewById(R.id.root_coordinatorlayout);
526         bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
527         bookmarksTitleTextView = findViewById(R.id.bookmarks_title_textview);
528         FloatingActionButton launchBookmarksActivityFab = findViewById(R.id.launch_bookmarks_activity_fab);
529         FloatingActionButton createBookmarkFolderFab = findViewById(R.id.create_bookmark_folder_fab);
530         FloatingActionButton createBookmarkFab = findViewById(R.id.create_bookmark_fab);
531         mainWebViewRelativeLayout = findViewById(R.id.main_webview_relativelayout);
532         mainWebView = findViewById(R.id.main_webview);
533         findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
534         findOnPageEditText = findViewById(R.id.find_on_page_edittext);
535         fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
536         urlAppBarRelativeLayout = findViewById(R.id.url_app_bar_relativelayout);
537         favoriteIconImageView = findViewById(R.id.favorite_icon);
538
539         // Set the bookmarks drawer resources according to the theme.  This can't be done in the layout due to compatibility issues with the `DrawerLayout` support widget.
540         if (darkTheme) {
541             launchBookmarksActivityFab.setImageDrawable(getResources().getDrawable(R.drawable.bookmarks_dark));
542             createBookmarkFolderFab.setImageDrawable(getResources().getDrawable(R.drawable.create_folder_dark));
543             createBookmarkFab.setImageDrawable(getResources().getDrawable(R.drawable.create_bookmark_dark));
544             bookmarksListView.setBackgroundColor(getResources().getColor(R.color.gray_850));
545         } else {
546             launchBookmarksActivityFab.setImageDrawable(getResources().getDrawable(R.drawable.bookmarks_light));
547             createBookmarkFolderFab.setImageDrawable(getResources().getDrawable(R.drawable.create_folder_light));
548             createBookmarkFab.setImageDrawable(getResources().getDrawable(R.drawable.create_bookmark_light));
549             bookmarksListView.setBackgroundColor(getResources().getColor(R.color.white));
550         }
551
552         // Set the launch bookmarks activity FAB to launch the bookmarks activity.
553         launchBookmarksActivityFab.setOnClickListener(v -> {
554             // Create an intent to launch the bookmarks activity.
555             Intent bookmarksIntent = new Intent(getApplicationContext(), BookmarksActivity.class);
556
557             // Include the current folder with the `Intent`.
558             bookmarksIntent.putExtra("Current Folder", currentBookmarksFolder);
559
560             // Make it so.
561             startActivity(bookmarksIntent);
562         });
563
564         // Set the create new bookmark folder FAB to display the `AlertDialog`.
565         createBookmarkFolderFab.setOnClickListener(v -> {
566             // Show the `CreateBookmarkFolderDialog` `AlertDialog` and name the instance `@string/create_folder`.
567             AppCompatDialogFragment createBookmarkFolderDialog = new CreateBookmarkFolderDialog();
568             createBookmarkFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_folder));
569         });
570
571         // Set the create new bookmark FAB to display the `AlertDialog`.
572         createBookmarkFab.setOnClickListener(view -> {
573             // Show the `CreateBookmarkDialog` `AlertDialog` and name the instance `@string/create_bookmark`.
574             AppCompatDialogFragment createBookmarkDialog = new CreateBookmarkDialog();
575             createBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_bookmark));
576         });
577
578         // Create a double-tap listener to toggle full-screen mode.
579         final GestureDetector gestureDetector = new GestureDetector(this, new GestureDetector.SimpleOnGestureListener() {
580             // Override `onDoubleTap()`.  All other events are handled using the default settings.
581             @Override
582             public boolean onDoubleTap(MotionEvent event) {
583                 if (fullScreenBrowsingModeEnabled) {  // Only process the double-tap if full screen browsing mode is enabled.
584                     // Toggle `inFullScreenBrowsingMode`.
585                     inFullScreenBrowsingMode = !inFullScreenBrowsingMode;
586
587                     if (inFullScreenBrowsingMode) {  // Switch to full screen mode.
588                         // Hide the `appBar`.
589                         appBar.hide();
590
591                         // Hide the `BannerAd` in the free flavor.
592                         if (BuildConfig.FLAVOR.contentEquals("free")) {
593                             BannerAd.hideAd(adView);
594                         }
595
596                         // Modify the system bars.
597                         if (hideSystemBarsOnFullscreen) {  // Hide everything.
598                             // Remove the translucent overlays.
599                             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
600
601                             // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
602                             drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
603
604                             /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
605                              * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
606                              * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
607                              */
608                             rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
609
610                             // Set `rootCoordinatorLayout` to fill the whole screen.
611                             rootCoordinatorLayout.setFitsSystemWindows(false);
612                         } else {  // Hide everything except the status and navigation bars.
613                             // Set `rootCoordinatorLayout` to fit under the status and navigation bars.
614                             rootCoordinatorLayout.setFitsSystemWindows(false);
615
616                             // There is an Android Support Library bug that causes a scrim to print on the right side of the `Drawer Layout` when the navigation bar is displayed on the right of the screen.
617                             if (translucentNavigationBarOnFullscreen) {
618                                 // Set the navigation bar to be translucent.
619                                 getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
620                             }
621                         }
622                     } else {  // Switch to normal viewing mode.
623                         // Show the `appBar`.
624                         appBar.show();
625
626                         // Show the `BannerAd` in the free flavor.
627                         if (BuildConfig.FLAVOR.contentEquals("free")) {
628                             // Reload the ad.  Because the screen may have rotated, we need to use `reloadAfterRotate`.
629                             BannerAd.reloadAfterRotate(adView, getApplicationContext(), getString(R.string.ad_id));
630
631                             // Reinitialize the `adView` variable, as the `View` will have been removed and re-added by `BannerAd.reloadAfterRotate()`.
632                             adView = findViewById(R.id.adview);
633                         }
634
635                         // Remove the translucent navigation bar flag if it is set.
636                         getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
637
638                         // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
639                         getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
640
641                         // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
642                         rootCoordinatorLayout.setSystemUiVisibility(0);
643
644                         // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
645                         rootCoordinatorLayout.setFitsSystemWindows(true);
646                     }
647
648                     // Consume the double-tap.
649                     return true;
650                 } else { // Do not consume the double-tap because full screen browsing mode is disabled.
651                     return false;
652                 }
653             }
654         });
655
656         // Pass all touch events on `mainWebView` through `gestureDetector` to check for double-taps.
657         mainWebView.setOnTouchListener((View v, MotionEvent event) -> {
658             // Call `performClick()` on the view, which is required for accessibility.
659             v.performClick();
660
661             // Send the `event` to `gestureDetector`.
662             return gestureDetector.onTouchEvent(event);
663         });
664
665         // Update `findOnPageCountTextView`.
666         mainWebView.setFindListener(new WebView.FindListener() {
667             // Get a handle for `findOnPageCountTextView`.
668             final TextView findOnPageCountTextView = (TextView) findViewById(R.id.find_on_page_count_textview);
669
670             @Override
671             public void onFindResultReceived(int activeMatchOrdinal, int numberOfMatches, boolean isDoneCounting) {
672                 if ((isDoneCounting) && (numberOfMatches == 0)) {  // There are no matches.
673                     // Set `findOnPageCountTextView` to `0/0`.
674                     findOnPageCountTextView.setText(R.string.zero_of_zero);
675                 } else if (isDoneCounting) {  // There are matches.
676                     // `activeMatchOrdinal` is zero-based.
677                     int activeMatch = activeMatchOrdinal + 1;
678
679                     // Build the match string.
680                     String matchString = activeMatch + "/" + numberOfMatches;
681
682                     // Set `findOnPageCountTextView`.
683                     findOnPageCountTextView.setText(matchString);
684                 }
685             }
686         });
687
688         // Search for the string on the page whenever a character changes in the `findOnPageEditText`.
689         findOnPageEditText.addTextChangedListener(new TextWatcher() {
690             @Override
691             public void beforeTextChanged(CharSequence s, int start, int count, int after) {
692                 // Do nothing.
693             }
694
695             @Override
696             public void onTextChanged(CharSequence s, int start, int before, int count) {
697                 // Do nothing.
698             }
699
700             @Override
701             public void afterTextChanged(Editable s) {
702                 // Search for the text in `mainWebView`.
703                 mainWebView.findAllAsync(findOnPageEditText.getText().toString());
704             }
705         });
706
707         // Set the `check mark` button for the `findOnPageEditText` keyboard to close the soft keyboard.
708         findOnPageEditText.setOnKeyListener((v, keyCode, event) -> {
709             if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {  // The `enter` key was pressed.
710                 // Hide the soft keyboard.  `0` indicates no additional flags.
711                 inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
712
713                 // Consume the event.
714                 return true;
715             } else {  // A different key was pressed.
716                 // Do not consume the event.
717                 return false;
718             }
719         });
720
721         // Implement swipe to refresh
722         swipeRefreshLayout = findViewById(R.id.swipe_refreshlayout);
723         swipeRefreshLayout.setColorSchemeResources(R.color.blue_700);
724         swipeRefreshLayout.setOnRefreshListener(() -> mainWebView.reload());
725
726         // `DrawerTitle` identifies the `DrawerLayouts` in accessibility mode.
727         drawerLayout.setDrawerTitle(GravityCompat.START, getString(R.string.navigation_drawer));
728         drawerLayout.setDrawerTitle(GravityCompat.END, getString(R.string.bookmarks));
729
730         // Listen for touches on the navigation menu.
731         final NavigationView navigationView = findViewById(R.id.navigationview);
732         navigationView.setNavigationItemSelectedListener(this);
733
734         // Get handles for `navigationMenu` and the back and forward menu items.  The menu is zero-based, so items 1, 2, and 3 are the second, third, and fourth entries in the menu.
735         final Menu navigationMenu = navigationView.getMenu();
736         final MenuItem navigationBackMenuItem = navigationMenu.getItem(1);
737         final MenuItem navigationForwardMenuItem = navigationMenu.getItem(2);
738         final MenuItem navigationHistoryMenuItem = navigationMenu.getItem(3);
739
740         // Initialize the bookmarks database helper.  `this` specifies the context.  The two `nulls` do not specify the database name or a `CursorFactory`.
741         // The `0` specifies a database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
742         bookmarksDatabaseHelper = new BookmarksDatabaseHelper(this, null, null, 0);
743
744         // Initialize `currentBookmarksFolder`.  `""` is the home folder in the database.
745         currentBookmarksFolder = "";
746
747         // Load the home folder, which is `""` in the database.
748         loadBookmarksFolder();
749
750         bookmarksListView.setOnItemClickListener((parent, view, position, id) -> {
751             // Convert the id from long to int to match the format of the bookmarks database.
752             int databaseID = (int) id;
753
754             // Get the bookmark `Cursor` for this ID and move it to the first row.
755             Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmarkCursor(databaseID);
756             bookmarkCursor.moveToFirst();
757
758             // Act upon the bookmark according to the type.
759             if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {  // The selected bookmark is a folder.
760                 // Store the new folder name in `currentBookmarksFolder`.
761                 currentBookmarksFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
762
763                 // Load the new folder.
764                 loadBookmarksFolder();
765             } else {  // The selected bookmark is not a folder.
766                 // Load the bookmark URL.
767                 loadUrl(bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL)));
768
769                 // Close the bookmarks drawer.
770                 drawerLayout.closeDrawer(GravityCompat.END);
771             }
772
773             // Close the `Cursor`.
774             bookmarkCursor.close();
775         });
776
777         bookmarksListView.setOnItemLongClickListener((parent, view, position, id) -> {
778             // Convert the database ID from `long` to `int`.
779             int databaseId = (int) id;
780
781             // Find out if the selected bookmark is a folder.
782             boolean isFolder = bookmarksDatabaseHelper.isFolder(databaseId);
783
784             if (isFolder) {
785                 // Save the current folder name, which is used in `onSaveEditBookmarkFolder()`.
786                 oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
787
788                 // Show the edit bookmark folder `AlertDialog` and name the instance `@string/edit_folder`.
789                 AppCompatDialogFragment editFolderDialog = EditBookmarkFolderDialog.folderDatabaseId(databaseId);
790                 editFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_folder));
791             } else {
792                 // Show the edit bookmark `AlertDialog` and name the instance `@string/edit_bookmark`.
793                 AppCompatDialogFragment editBookmarkDialog = EditBookmarkDialog.bookmarkDatabaseId(databaseId);
794                 editBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_bookmark));
795             }
796
797             // Consume the event.
798             return true;
799         });
800
801         // The `DrawerListener` allows us to update the Navigation Menu.
802         drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
803             @Override
804             public void onDrawerSlide(@NonNull View drawerView, float slideOffset) {
805             }
806
807             @Override
808             public void onDrawerOpened(@NonNull View drawerView) {
809             }
810
811             @Override
812             public void onDrawerClosed(@NonNull View drawerView) {
813             }
814
815             @Override
816             public void onDrawerStateChanged(int newState) {
817                 if ((newState == DrawerLayout.STATE_SETTLING) || (newState == DrawerLayout.STATE_DRAGGING)) {  // The drawer is opening or closing.
818                     // Update the `Back`, `Forward`, and `History` menu items.
819                     navigationBackMenuItem.setEnabled(mainWebView.canGoBack());
820                     navigationForwardMenuItem.setEnabled(mainWebView.canGoForward());
821                     navigationHistoryMenuItem.setEnabled((mainWebView.canGoBack() || mainWebView.canGoForward()));
822
823                     // Hide the keyboard (if displayed) so we can see the navigation menu.  `0` indicates no additional flags.
824                     inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
825
826                     // Clear the focus from `urlTextBox` if it has it.
827                     urlTextBox.clearFocus();
828                 }
829             }
830         });
831
832         // drawerToggle creates the hamburger icon at the start of the AppBar.
833         drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, supportAppBar, R.string.open_navigation_drawer, R.string.close_navigation_drawer);
834
835         // Get a handle for the progress bar.
836         final ProgressBar progressBar = findViewById(R.id.progress_bar);
837
838         mainWebView.setWebChromeClient(new WebChromeClient() {
839             // Update the progress bar when a page is loading.
840             @Override
841             public void onProgressChanged(WebView view, int progress) {
842                 // Inject the night mode CSS if night mode is enabled.
843                 if (nightMode) {
844                     // `background-color: #212121` sets the background to be dark gray.  `color: #BDBDBD` sets the text color to be light gray.  `box-shadow: none` removes a lower underline on links
845                     // used by WordPress.  `text-decoration: none` removes all text underlines.  `text-shadow: none` removes text shadows, which usually have a hard coded color.
846                     // `border: none` removes all borders, which can also be used to underline text.
847                     // `a {color: #1565C0}` sets links to be a dark blue.  `!important` takes precedent over any existing sub-settings.
848                     mainWebView.evaluateJavascript("(function() {var parent = document.getElementsByTagName('head').item(0); var style = document.createElement('style'); style.type = 'text/css'; " +
849                             "style.innerHTML = '* {background-color: #212121 !important; color: #BDBDBD !important; box-shadow: none !important; text-decoration: none !important;" +
850                             "text-shadow: none !important; border: none !important;} a {color: #1565C0 !important;}'; parent.appendChild(style)})()", value -> {
851                                 // Initialize a `Handler` to display `mainWebView`.
852                                 Handler displayWebViewHandler = new Handler();
853
854                                 // Setup a `Runnable` to display `mainWebView` after a delay to allow the CSS to be applied.
855                                 Runnable displayWebViewRunnable = () -> {
856                                     // Only display `mainWebView` if the progress bar is one.  This prevents the display of the `WebView` while it is still loading.
857                                     if (progressBar.getVisibility() == View.GONE) {
858                                         mainWebView.setVisibility(View.VISIBLE);
859                                     }
860                                 };
861
862                                 // Use `displayWebViewHandler` to delay the displaying of `mainWebView` for 500 milliseconds.
863                                 displayWebViewHandler.postDelayed(displayWebViewRunnable, 500);
864                             });
865                 }
866
867                 // Update the progress bar.
868                 progressBar.setProgress(progress);
869
870                 // Set the visibility of the progress bar.
871                 if (progress < 100) {
872                     // Show the progress bar.
873                     progressBar.setVisibility(View.VISIBLE);
874                 } else {
875                     // Hide the progress bar.
876                     progressBar.setVisibility(View.GONE);
877
878                     // Display `mainWebView` if night mode is disabled.
879                     // Because of a race condition between `applyDomainSettings` and `onPageStarted`, when night mode is set by domain settings the `WebView` may be hidden even if night mode is not
880                     // currently enabled.
881                     if (!nightMode) {
882                         mainWebView.setVisibility(View.VISIBLE);
883                     }
884
885                     //Stop the `SwipeToRefresh` indicator if it is running
886                     swipeRefreshLayout.setRefreshing(false);
887                 }
888             }
889
890             // Set the favorite icon when it changes.
891             @Override
892             public void onReceivedIcon(WebView view, Bitmap icon) {
893                 // Only update the favorite icon if the website has finished loading.
894                 if (progressBar.getVisibility() == View.GONE) {
895                     // Save a copy of the favorite icon.
896                     favoriteIconBitmap = icon;
897
898                     // Place the favorite icon in the appBar.
899                     favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
900                 }
901             }
902
903             // Save a copy of the title when it changes.
904             @Override
905             public void onReceivedTitle(WebView view, String title) {
906                 // Save a copy of the title.
907                 webViewTitle = title;
908             }
909
910             // Enter full screen video
911             @Override
912             public void onShowCustomView(View view, CustomViewCallback callback) {
913                 // Pause the ad if this is the free flavor.
914                 if (BuildConfig.FLAVOR.contentEquals("free")) {
915                     BannerAd.pauseAd(adView);
916                 }
917
918                 // Remove the translucent overlays.
919                 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
920
921                 // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
922                 drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
923
924                 /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
925                  * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
926                  * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
927                  */
928                 rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
929
930                 // Set `rootCoordinatorLayout` to fill the entire screen.
931                 rootCoordinatorLayout.setFitsSystemWindows(false);
932
933                 // Add `view` to `fullScreenVideoFrameLayout` and display it on the screen.
934                 fullScreenVideoFrameLayout.addView(view);
935                 fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
936             }
937
938             // Exit full screen video
939             public void onHideCustomView() {
940                 // Hide `fullScreenVideoFrameLayout`.
941                 fullScreenVideoFrameLayout.removeAllViews();
942                 fullScreenVideoFrameLayout.setVisibility(View.GONE);
943
944                 // Add the translucent status flag.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
945                 getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
946
947                 // Set `rootCoordinatorLayout` to fit inside the status and navigation bars.  This also clears the `SYSTEM_UI` flags.
948                 rootCoordinatorLayout.setFitsSystemWindows(true);
949
950                 // Show the ad if this is the free flavor.
951                 if (BuildConfig.FLAVOR.contentEquals("free")) {
952                     // Reload the ad.  Because the screen may have rotated, we need to use `reloadAfterRotate`.
953                     BannerAd.reloadAfterRotate(adView, getApplicationContext(), getString(R.string.ad_id));
954
955                     // Reinitialize the `adView` variable, as the `View` will have been removed and re-added by `BannerAd.reloadAfterRotate()`.
956                     adView = findViewById(R.id.adview);
957                 }
958             }
959         });
960
961         // Register `mainWebView` for a context menu.  This is used to see link targets and download images.
962         registerForContextMenu(mainWebView);
963
964         // Allow the downloading of files.
965         mainWebView.setDownloadListener((String url, String userAgent, String contentDisposition, String mimetype, long contentLength) -> {
966             // Check to see if the WRITE_EXTERNAL_STORAGE permission has already been granted.
967             if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {
968                 // The WRITE_EXTERNAL_STORAGE permission needs to be requested.
969
970                 // Store the variables for future use by `onRequestPermissionsResult()`.
971                 downloadUrl = url;
972                 downloadContentDisposition = contentDisposition;
973                 downloadContentLength = contentLength;
974
975                 // Show a dialog if the user has previously denied the permission.
976                 if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
977                     // Get a handle for the download location permission alert dialog and set the download type to DOWNLOAD_FILE.
978                     DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_FILE);
979
980                     // Show the download location permission alert dialog.  The permission will be requested when the the dialog is closed.
981                     downloadLocationPermissionDialogFragment.show(getFragmentManager(), getString(R.string.download_location));
982                 } else {  // Show the permission request directly.
983                     // Request the permission.  The download dialog will be launched by `onRequestPermissionResult()`.
984                     ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
985                 }
986             } else {  // The WRITE_EXTERNAL_STORAGE permission has already been granted.
987                 // Get a handle for the download file alert dialog.
988                 AppCompatDialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(url, contentDisposition, contentLength);
989
990                 // Show the download file alert dialog.
991                 downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
992             }
993         });
994
995         // Allow pinch to zoom.
996         mainWebView.getSettings().setBuiltInZoomControls(true);
997
998         // Hide zoom controls.
999         mainWebView.getSettings().setDisplayZoomControls(false);
1000
1001         // Set `mainWebView` to use a wide viewport.  Otherwise, some web pages will be scrunched and some content will render outside the screen.
1002         mainWebView.getSettings().setUseWideViewPort(true);
1003
1004         // Set `mainWebView` to load in overview mode (zoomed out to the maximum width).
1005         mainWebView.getSettings().setLoadWithOverviewMode(true);
1006
1007         // Explicitly disable geolocation.
1008         mainWebView.getSettings().setGeolocationEnabled(false);
1009
1010         // Initialize cookieManager.
1011         cookieManager = CookieManager.getInstance();
1012
1013         // Replace the header that `WebView` creates for `X-Requested-With` with a null value.  The default value is the application ID (com.stoutner.privacybrowser.standard).
1014         customHeaders.put("X-Requested-With", "");
1015
1016         // Initialize the default preference values the first time the program is run.  `this` is the context.  `false` keeps this command from resetting any current preferences back to default.
1017         PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
1018
1019         // Get the intent that started the app.
1020         final Intent launchingIntent = getIntent();
1021
1022         // Extract the launching intent data as `launchingIntentUriData`.
1023         final Uri launchingIntentUriData = launchingIntent.getData();
1024
1025         // Convert the launching intent URI data (if it exists) to a string and store it in `formattedUrlString`.
1026         if (launchingIntentUriData != null) {
1027             formattedUrlString = launchingIntentUriData.toString();
1028         }
1029
1030         // Get a handle for the `Runtime`.
1031         privacyBrowserRuntime = Runtime.getRuntime();
1032
1033         // Store the application's private data directory.
1034         privateDataDirectoryString = getApplicationInfo().dataDir;
1035         // `dataDir` will vary, but will be something like `/data/user/0/com.stoutner.privacybrowser.standard`, which links to `/data/data/com.stoutner.privacybrowser.standard`.
1036
1037         // Initialize `inFullScreenBrowsingMode`, which is always false at this point because Privacy Browser never starts in full screen browsing mode.
1038         inFullScreenBrowsingMode = false;
1039
1040         // Initialize AdView for the free flavor.
1041         adView = findViewById(R.id.adview);
1042
1043         // Initialize the privacy settings variables.
1044         javaScriptEnabled = false;
1045         firstPartyCookiesEnabled = false;
1046         thirdPartyCookiesEnabled = false;
1047         domStorageEnabled = false;
1048         saveFormDataEnabled = false;
1049         nightMode = false;
1050
1051         // Initialize `webViewTitle`.
1052         webViewTitle = getString(R.string.no_title);
1053
1054         // Initialize `favoriteIconBitmap`.  `ContextCompat` must be used until API >= 21.
1055         Drawable favoriteIconDrawable = ContextCompat.getDrawable(getApplicationContext(), R.drawable.world);
1056         BitmapDrawable favoriteIconBitmapDrawable = (BitmapDrawable) favoriteIconDrawable;
1057         assert favoriteIconBitmapDrawable != null;
1058         favoriteIconDefaultBitmap = favoriteIconBitmapDrawable.getBitmap();
1059
1060         // If the favorite icon is null, load the default.
1061         if (favoriteIconBitmap == null) {
1062             favoriteIconBitmap = favoriteIconDefaultBitmap;
1063         }
1064
1065         // Apply the app settings from the shared preferences.
1066         applyAppSettings();
1067
1068         // Instantiate the block list helper.
1069         BlockListHelper blockListHelper = new BlockListHelper();
1070
1071         // Parse the block lists.
1072         final ArrayList<List<String[]>> easyList = blockListHelper.parseBlockList(getAssets(), "blocklists/easylist.txt");
1073         final ArrayList<List<String[]>> easyPrivacy = blockListHelper.parseBlockList(getAssets(), "blocklists/easyprivacy.txt");
1074         final ArrayList<List<String[]>> fanboyAnnoyance = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-annoyance.txt");
1075         final ArrayList<List<String[]>> fanboySocial = blockListHelper.parseBlockList(getAssets(), "blocklists/fanboy-social.txt");
1076
1077         // Store the list versions.
1078         easyListVersion = easyList.get(0).get(0)[0];
1079         easyPrivacyVersion = easyPrivacy.get(0).get(0)[0];
1080         fanboyAnnoyanceVersion = fanboyAnnoyance.get(0).get(0)[0];
1081         fanboySocialVersion = fanboySocial.get(0).get(0)[0];
1082
1083         mainWebView.setWebViewClient(new WebViewClient() {
1084             // `shouldOverrideUrlLoading` makes this `WebView` the default handler for URLs inside the app, so that links are not kicked out to other apps.
1085             // The deprecated `shouldOverrideUrlLoading` must be used until API >= 24.
1086             @SuppressWarnings("deprecation")
1087             @Override
1088             public boolean shouldOverrideUrlLoading(WebView view, String url) {
1089                 if (url.startsWith("http")) {  // Load the URL in Privacy Browser.
1090                     // Apply the domain settings for the new URL.
1091                     applyDomainSettings(url, true);
1092
1093                     // Returning false causes the current `WebView` to handle the URL and prevents it from adding redirects to the history list.
1094                     return false;
1095                 } else if (url.startsWith("mailto:")) {  // Load the email address in an external email program.
1096                     // Use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
1097                     Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
1098
1099                     // Parse the url and set it as the data for the intent.
1100                     emailIntent.setData(Uri.parse(url));
1101
1102                     // Open the email program in a new task instead of as part of Privacy Browser.
1103                     emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1104
1105                     // Make it so.
1106                     startActivity(emailIntent);
1107
1108                     // Returning true indicates Privacy Browser is handling the URL by creating an intent.
1109                     return true;
1110                 } else if (url.startsWith("tel:")) {  // Load the phone number in the dialer.
1111                     // Open the dialer and load the phone number, but wait for the user to place the call.
1112                     Intent dialIntent = new Intent(Intent.ACTION_DIAL);
1113
1114                     // Add the phone number to the intent.
1115                     dialIntent.setData(Uri.parse(url));
1116
1117                     // Open the dialer in a new task instead of as part of Privacy Browser.
1118                     dialIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1119
1120                     // Make it so.
1121                     startActivity(dialIntent);
1122
1123                     // Returning true indicates Privacy Browser is handling the URL by creating an intent.
1124                     return true;
1125                 } else {  // Load a system chooser to select an app that can handle the URL.
1126                     // Open an app that can handle the URL.
1127                     Intent genericIntent = new Intent(Intent.ACTION_VIEW);
1128
1129                     // Add the URL to the intent.
1130                     genericIntent.setData(Uri.parse(url));
1131
1132                     // List all apps that can handle the URL instead of just opening the first one.
1133                     genericIntent.addCategory(Intent.CATEGORY_BROWSABLE);
1134
1135                     // Open the app in a new task instead of as part of Privacy Browser.
1136                     genericIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1137
1138                     // Start the app or display a snackbar if no app is available to handle the URL.
1139                     try {
1140                         startActivity(genericIntent);
1141                     } catch (ActivityNotFoundException exception) {
1142                         Snackbar.make(mainWebView, getString(R.string.unrecognized_url) + "  " + url, Snackbar.LENGTH_SHORT).show();
1143                     }
1144
1145                     // Returning true indicates Privacy Browser is handling the URL by creating an intent.
1146                     return true;
1147                 }
1148             }
1149
1150             // Check requests against the block lists.  The deprecated `shouldInterceptRequest` must be used until minimum API >= 21.
1151             @SuppressWarnings("deprecation")
1152             @Override
1153             public WebResourceResponse shouldInterceptRequest(WebView view, String url){
1154                 // Create an empty web resource response to be used if the resource request is blocked.
1155                 WebResourceResponse emptyWebResourceResponse = new WebResourceResponse("text/plain", "utf8", new ByteArrayInputStream("".getBytes()));
1156
1157                 // Check EasyList if it is enabled.
1158                 if (easyListEnabled) {
1159                     if (blockListHelper.isBlocked(formattedUrlString, url, easyList)) {
1160                         // The resource request was blocked.  Return an empty web resource response.
1161                         return emptyWebResourceResponse;
1162                     }
1163                 }
1164
1165                 // Check EasyPrivacy if it is enabled.
1166                 if (easyPrivacyEnabled) {
1167                     if (blockListHelper.isBlocked(formattedUrlString, url, easyPrivacy)) {
1168                         // The resource request was blocked.  Return an empty web resource response.
1169                         return emptyWebResourceResponse;
1170                     }
1171                 }
1172
1173                 // Check Fanboy’s Annoyance List if it is enabled.
1174                 if (fanboysAnnoyanceListEnabled) {
1175                     if (blockListHelper.isBlocked(formattedUrlString, url, fanboyAnnoyance)) {
1176                         // The resource request was blocked.  Return an empty web resource response.
1177                         return emptyWebResourceResponse;
1178                     }
1179                 } else if (fanboysSocialBlockingListEnabled){  // Only check Fanboy’s Social Blocking List if Fanboy’s Annoyance List is disabled.
1180                     if (blockListHelper.isBlocked(formattedUrlString, url, fanboySocial)) {
1181                         // The resource request was blocked.  Return an empty web resource response.
1182                         return emptyWebResourceResponse;
1183                     }
1184                 }
1185
1186                 // The resource request has not been blocked.  `return null` loads the requested resource.
1187                 return null;
1188             }
1189
1190             // Handle HTTP authentication requests.
1191             @Override
1192             public void onReceivedHttpAuthRequest(WebView view, HttpAuthHandler handler, String host, String realm) {
1193                 // Store `handler` so it can be accessed from `onHttpAuthenticationCancel()` and `onHttpAuthenticationProceed()`.
1194                 httpAuthHandler = handler;
1195
1196                 // Display the HTTP authentication dialog.
1197                 AppCompatDialogFragment httpAuthenticationDialogFragment = HttpAuthenticationDialog.displayDialog(host, realm);
1198                 httpAuthenticationDialogFragment.show(getSupportFragmentManager(), getString(R.string.http_authentication));
1199             }
1200
1201             // Update the URL in urlTextBox when the page starts to load.
1202             @Override
1203             public void onPageStarted(WebView view, String url, Bitmap favicon) {// If night mode is enabled, hide `mainWebView` until after the night mode CSS is applied.
1204                 if (nightMode) {
1205                     mainWebView.setVisibility(View.INVISIBLE);
1206                 }
1207
1208                 // Hide the keyboard.  `0` indicates no additional flags.
1209                 inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
1210
1211                 // Check to see if we are waiting on Orbot.
1212                 if (!waitingForOrbot) {  // We are not waiting on Orbot, so we need to process the URL.
1213                     // We need to update `formattedUrlString` at the beginning of the load, so that if the user toggles JavaScript during the load the new website is reloaded.
1214                     formattedUrlString = url;
1215
1216                     // Display the formatted URL text.
1217                     urlTextBox.setText(formattedUrlString);
1218
1219                     // Apply text highlighting to `urlTextBox`.
1220                     highlightUrlText();
1221
1222                     // Apply any custom domain settings if the URL was loaded by navigating history.
1223                     if (navigatingHistory) {
1224                         applyDomainSettings(url, true);
1225                     }
1226
1227                     // Set `urlIsLoading` to `true`, so that redirects while loading do not trigger changes in the user agent, which forces another reload of the existing page.
1228                     urlIsLoading = true;
1229                 }
1230             }
1231
1232             // It is necessary to update `formattedUrlString` and `urlTextBox` after the page finishes loading because the final URL can change during load.
1233             @Override
1234             public void onPageFinished(WebView view, String url) {
1235                 // Flush any cookies to persistent storage.  `CookieManager` has become very lazy about flushing cookies in recent versions.
1236                 if (firstPartyCookiesEnabled && Build.VERSION.SDK_INT >= 21) {
1237                     cookieManager.flush();
1238                 }
1239
1240                 // Reset `urlIsLoading`, which is used to prevent reloads on redirect if the user agent changes.
1241                 urlIsLoading = false;
1242
1243                 // Clear the cache and history if Incognito Mode is enabled.
1244                 if (incognitoModeEnabled) {
1245                     // Clear the cache.  `true` includes disk files.
1246                     mainWebView.clearCache(true);
1247
1248                     // Clear the back/forward history.
1249                     mainWebView.clearHistory();
1250
1251                     // Manually delete cache folders.
1252                     try {
1253                         // Delete the main `cache` folder.
1254                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
1255
1256                         // Delete the `app_webview` folder, which contains an additional `WebView` cache.  See `https://code.google.com/p/android/issues/detail?id=233826&thanks=233826&ts=1486670530`.
1257                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview");
1258                     } catch (IOException e) {
1259                         // Do nothing if an error is thrown.
1260                     }
1261                 }
1262
1263                 // Update `urlTextBox` and apply domain settings if not waiting on Orbot.
1264                 if (!waitingForOrbot) {
1265                     // Check to see if `WebView` has set `url` to be `about:blank`.
1266                     if (url.equals("about:blank")) {  // `WebView` is blank, so `formattedUrlString` should be `""` and `urlTextBox` should display a hint.
1267                         // Set `formattedUrlString` to `""`.
1268                         formattedUrlString = "";
1269
1270                         urlTextBox.setText(formattedUrlString);
1271
1272                         // Request focus for `urlTextBox`.
1273                         urlTextBox.requestFocus();
1274
1275                         // Display the keyboard.
1276                         inputMethodManager.showSoftInput(urlTextBox, 0);
1277
1278                         // Apply the domain settings.  This clears any settings from the previous domain.
1279                         applyDomainSettings(formattedUrlString, true);
1280                     } else {  // `WebView` has loaded a webpage.
1281                         // Set `formattedUrlString`.
1282                         formattedUrlString = url;
1283
1284                         // Only update `urlTextBox` if the user is not typing in it.
1285                         if (!urlTextBox.hasFocus()) {
1286                             // Display the formatted URL text.
1287                             urlTextBox.setText(formattedUrlString);
1288
1289                             // Apply text highlighting to `urlTextBox`.
1290                             highlightUrlText();
1291                         }
1292                     }
1293
1294                     // Store the SSL certificate so it can be accessed from `ViewSslCertificateDialog` and `PinnedSslCertificateMismatchDialog`.
1295                     sslCertificate = mainWebView.getCertificate();
1296
1297                     // Check the current website SSL certificate against the pinned SSL certificate if there is a pinned SSL certificate the user has not chosen to ignore it for this session.
1298                     if (pinnedDomainSslCertificate && !ignorePinnedSslCertificate) {
1299                         // Initialize the current SSL certificate variables.
1300                         String currentWebsiteIssuedToCName = "";
1301                         String currentWebsiteIssuedToOName = "";
1302                         String currentWebsiteIssuedToUName = "";
1303                         String currentWebsiteIssuedByCName = "";
1304                         String currentWebsiteIssuedByOName = "";
1305                         String currentWebsiteIssuedByUName = "";
1306                         Date currentWebsiteSslStartDate = null;
1307                         Date currentWebsiteSslEndDate = null;
1308
1309
1310                         // Extract the individual pieces of information from the current website SSL certificate if it is not null.
1311                         if (sslCertificate != null) {
1312                             currentWebsiteIssuedToCName = sslCertificate.getIssuedTo().getCName();
1313                             currentWebsiteIssuedToOName = sslCertificate.getIssuedTo().getOName();
1314                             currentWebsiteIssuedToUName = sslCertificate.getIssuedTo().getUName();
1315                             currentWebsiteIssuedByCName = sslCertificate.getIssuedBy().getCName();
1316                             currentWebsiteIssuedByOName = sslCertificate.getIssuedBy().getOName();
1317                             currentWebsiteIssuedByUName = sslCertificate.getIssuedBy().getUName();
1318                             currentWebsiteSslStartDate = sslCertificate.getValidNotBeforeDate();
1319                             currentWebsiteSslEndDate = sslCertificate.getValidNotAfterDate();
1320                         }
1321
1322                         // Initialize `String` variables to store the SSL certificate dates.  `Strings` are needed to compare the values below, which doesn't work with `Dates` if they are `null`.
1323                         String currentWebsiteSslStartDateString = "";
1324                         String currentWebsiteSslEndDateString = "";
1325                         String pinnedDomainSslStartDateString = "";
1326                         String pinnedDomainSslEndDateString = "";
1327
1328                         // Convert the `Dates` to `Strings` if they are not `null`.
1329                         if (currentWebsiteSslStartDate != null) {
1330                             currentWebsiteSslStartDateString = currentWebsiteSslStartDate.toString();
1331                         }
1332
1333                         if (currentWebsiteSslEndDate != null) {
1334                             currentWebsiteSslEndDateString = currentWebsiteSslEndDate.toString();
1335                         }
1336
1337                         if (pinnedDomainSslStartDate != null) {
1338                             pinnedDomainSslStartDateString = pinnedDomainSslStartDate.toString();
1339                         }
1340
1341                         if (pinnedDomainSslEndDate != null) {
1342                             pinnedDomainSslEndDateString = pinnedDomainSslEndDate.toString();
1343                         }
1344
1345                         // Check to see if the pinned SSL certificate matches the current website certificate.
1346                         if (!currentWebsiteIssuedToCName.equals(pinnedDomainSslIssuedToCNameString) || !currentWebsiteIssuedToOName.equals(pinnedDomainSslIssuedToONameString) ||
1347                                 !currentWebsiteIssuedToUName.equals(pinnedDomainSslIssuedToUNameString) || !currentWebsiteIssuedByCName.equals(pinnedDomainSslIssuedByCNameString) ||
1348                                 !currentWebsiteIssuedByOName.equals(pinnedDomainSslIssuedByONameString) || !currentWebsiteIssuedByUName.equals(pinnedDomainSslIssuedByUNameString) ||
1349                                 !currentWebsiteSslStartDateString.equals(pinnedDomainSslStartDateString) || !currentWebsiteSslEndDateString.equals(pinnedDomainSslEndDateString)) {
1350                             // The pinned SSL certificate doesn't match the current domain certificate.
1351                             //Display the pinned SSL certificate mismatch `AlertDialog`.
1352                             AppCompatDialogFragment pinnedSslCertificateMismatchDialogFragment = new PinnedSslCertificateMismatchDialog();
1353                             pinnedSslCertificateMismatchDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_mismatch));
1354                         }
1355                     }
1356                 }
1357             }
1358
1359             // Handle SSL Certificate errors.
1360             @Override
1361             public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
1362                 // Get the current website SSL certificate.
1363                 SslCertificate currentWebsiteSslCertificate = error.getCertificate();
1364
1365                 // Extract the individual pieces of information from the current website SSL certificate.
1366                 String currentWebsiteIssuedToCName = currentWebsiteSslCertificate.getIssuedTo().getCName();
1367                 String currentWebsiteIssuedToOName = currentWebsiteSslCertificate.getIssuedTo().getOName();
1368                 String currentWebsiteIssuedToUName = currentWebsiteSslCertificate.getIssuedTo().getUName();
1369                 String currentWebsiteIssuedByCName = currentWebsiteSslCertificate.getIssuedBy().getCName();
1370                 String currentWebsiteIssuedByOName = currentWebsiteSslCertificate.getIssuedBy().getOName();
1371                 String currentWebsiteIssuedByUName = currentWebsiteSslCertificate.getIssuedBy().getUName();
1372                 Date currentWebsiteSslStartDate = currentWebsiteSslCertificate.getValidNotBeforeDate();
1373                 Date currentWebsiteSslEndDate = currentWebsiteSslCertificate.getValidNotAfterDate();
1374
1375                 // Proceed to the website if the current SSL website certificate matches the pinned domain certificate.
1376                 if (pinnedDomainSslCertificate &&
1377                         currentWebsiteIssuedToCName.equals(pinnedDomainSslIssuedToCNameString) && currentWebsiteIssuedToOName.equals(pinnedDomainSslIssuedToONameString) &&
1378                         currentWebsiteIssuedToUName.equals(pinnedDomainSslIssuedToUNameString) && currentWebsiteIssuedByCName.equals(pinnedDomainSslIssuedByCNameString) &&
1379                         currentWebsiteIssuedByOName.equals(pinnedDomainSslIssuedByONameString) && currentWebsiteIssuedByUName.equals(pinnedDomainSslIssuedByUNameString) &&
1380                         currentWebsiteSslStartDate.equals(pinnedDomainSslStartDate) && currentWebsiteSslEndDate.equals(pinnedDomainSslEndDate)) {
1381                     // An SSL certificate is pinned and matches the current domain certificate.
1382                     // Proceed to the website without displaying an error.
1383                     handler.proceed();
1384                 } else {  // Either there isn't a pinned SSL certificate or it doesn't match the current website certificate.
1385                     // Store `handler` so it can be accesses from `onSslErrorCancel()` and `onSslErrorProceed()`.
1386                     sslErrorHandler = handler;
1387
1388                     // Display the SSL error `AlertDialog`.
1389                     AppCompatDialogFragment sslCertificateErrorDialogFragment = SslCertificateErrorDialog.displayDialog(error);
1390                     sslCertificateErrorDialogFragment.show(getSupportFragmentManager(), getString(R.string.ssl_certificate_error));
1391                 }
1392             }
1393         });
1394
1395         // Load the website if not waiting for Orbot to connect.
1396         if (!waitingForOrbot) {
1397             loadUrl(formattedUrlString);
1398         }
1399     }
1400
1401     @Override
1402     protected void onNewIntent(Intent intent) {
1403         // Sets the new intent as the activity intent, so that any future `getIntent()`s pick up this one instead of creating a new activity.
1404         setIntent(intent);
1405
1406         // Check to see if the intent contains a new URL.
1407         if (intent.getData() != null) {
1408             // Get the intent data and convert it to a string.
1409             final Uri intentUriData = intent.getData();
1410             formattedUrlString = intentUriData.toString();
1411
1412             // Load the website.
1413             loadUrl(formattedUrlString);
1414
1415             // Close the navigation drawer if it is open.
1416             if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
1417                 drawerLayout.closeDrawer(GravityCompat.START);
1418             }
1419
1420             // Close the bookmarks drawer if it is open.
1421             if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
1422                 drawerLayout.closeDrawer(GravityCompat.END);
1423             }
1424
1425             // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
1426             mainWebView.requestFocus();
1427         }
1428     }
1429
1430     @Override
1431     public void onRestart() {
1432         // Run the default commands.
1433         super.onRestart();
1434
1435         // Make sure Orbot is running if Privacy Browser is proxying through Orbot.
1436         if (proxyThroughOrbot) {
1437             // Request Orbot to start.  If Orbot is already running no hard will be caused by this request.
1438             Intent orbotIntent = new Intent("org.torproject.android.intent.action.START");
1439
1440             // Send the intent to the Orbot package.
1441             orbotIntent.setPackage("org.torproject.android");
1442
1443             // Make it so.
1444             sendBroadcast(orbotIntent);
1445         }
1446
1447         // Apply the app settings if returning from the Settings activity..
1448         if (reapplyAppSettingsOnRestart) {
1449             // Apply the app settings.
1450             applyAppSettings();
1451
1452             // Reload the webpage if displaying of images has been disabled in the Settings activity.
1453             if (reloadOnRestart) {
1454                 // Reload `mainWebView`.
1455                 mainWebView.reload();
1456
1457                 // Reset `reloadOnRestartBoolean`.
1458                 reloadOnRestart = false;
1459             }
1460
1461             // Reset the return from settings flag.
1462             reapplyAppSettingsOnRestart = false;
1463         }
1464
1465         // Apply the domain settings if returning from the Domains activity.
1466         if (reapplyDomainSettingsOnRestart) {
1467             // Reapply the domain settings.
1468             applyDomainSettings(formattedUrlString, false);
1469
1470             // Reset `reapplyDomainSettingsOnRestart`.
1471             reapplyDomainSettingsOnRestart = false;
1472         }
1473
1474         // Load the URL on restart to apply changes to night mode.
1475         if (loadUrlOnRestart) {
1476             // Load the current `formattedUrlString`.
1477             loadUrl(formattedUrlString);
1478
1479             // Reset `loadUrlOnRestart.
1480             loadUrlOnRestart = false;
1481         }
1482
1483         // Update the bookmarks drawer if returning from the Bookmarks activity.
1484         if (restartFromBookmarksActivity) {
1485             // Close the bookmarks drawer.
1486             drawerLayout.closeDrawer(GravityCompat.END);
1487
1488             // Reload the bookmarks drawer.
1489             loadBookmarksFolder();
1490
1491             // Reset `restartFromBookmarksActivity`.
1492             restartFromBookmarksActivity = false;
1493         }
1494
1495         // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
1496         updatePrivacyIcons(true);
1497     }
1498
1499     // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
1500     @Override
1501     public void onResume() {
1502         // Run the default commands.
1503         super.onResume();
1504
1505         // Resume JavaScript (if enabled).
1506         mainWebView.resumeTimers();
1507
1508         // Resume `mainWebView`.
1509         mainWebView.onResume();
1510
1511         // Resume the adView for the free flavor.
1512         if (BuildConfig.FLAVOR.contentEquals("free")) {
1513             BannerAd.resumeAd(adView);
1514         }
1515     }
1516
1517     @Override
1518     public void onPause() {
1519         // Pause `mainWebView`.
1520         mainWebView.onPause();
1521
1522         // Stop all JavaScript.
1523         mainWebView.pauseTimers();
1524
1525         // Pause the adView or it will continue to consume resources in the background on the free flavor.
1526         if (BuildConfig.FLAVOR.contentEquals("free")) {
1527             BannerAd.pauseAd(adView);
1528         }
1529
1530         super.onPause();
1531     }
1532
1533     @Override
1534     public boolean onCreateOptionsMenu(Menu menu) {
1535         // Inflate the menu; this adds items to the action bar if it is present.
1536         getMenuInflater().inflate(R.menu.webview_options_menu, menu);
1537
1538         // Set mainMenu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons`.
1539         mainMenu = menu;
1540
1541         // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
1542         updatePrivacyIcons(false);
1543
1544         // Get handles for the menu items.
1545         MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
1546         MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
1547         MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
1548         MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);
1549
1550         // Only display third-party cookies if SDK >= 21
1551         toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
1552
1553         // Get the shared preference values.  `this` references the current context.
1554         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
1555
1556         // Set the status of the additional app bar icons.  The default is `false`.
1557         if (sharedPreferences.getBoolean("display_additional_app_bar_icons", false)) {
1558             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
1559             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
1560             toggleSaveFormDataMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
1561         } else { //Do not display the additional icons.
1562             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
1563             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
1564             toggleSaveFormDataMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
1565         }
1566
1567         return true;
1568     }
1569
1570     @Override
1571     public boolean onPrepareOptionsMenu(Menu menu) {
1572         // Get handles for the menu items.
1573         MenuItem addOrEditDomain = menu.findItem(R.id.add_or_edit_domain);
1574         MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
1575         MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
1576         MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
1577         MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);
1578         MenuItem clearDataMenuItem = menu.findItem(R.id.clear_data);
1579         MenuItem clearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
1580         MenuItem clearDOMStorageMenuItem = menu.findItem(R.id.clear_dom_storage);
1581         MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);
1582         MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
1583         MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
1584         MenuItem refreshMenuItem = menu.findItem(R.id.refresh);
1585
1586         // Set the text for the domain menu item.
1587         if (domainSettingsApplied) {
1588             addOrEditDomain.setTitle(R.string.edit_domain_settings);
1589         } else {
1590             addOrEditDomain.setTitle(R.string.add_domain_settings);
1591         }
1592
1593         // Set the status of the menu item checkboxes.
1594         toggleFirstPartyCookiesMenuItem.setChecked(firstPartyCookiesEnabled);
1595         toggleThirdPartyCookiesMenuItem.setChecked(thirdPartyCookiesEnabled);
1596         toggleDomStorageMenuItem.setChecked(domStorageEnabled);
1597         toggleSaveFormDataMenuItem.setChecked(saveFormDataEnabled);
1598         displayImagesMenuItem.setChecked(mainWebView.getSettings().getLoadsImagesAutomatically());
1599
1600         // Enable third-party cookies if first-party cookies are enabled.
1601         toggleThirdPartyCookiesMenuItem.setEnabled(firstPartyCookiesEnabled);
1602
1603         // Enable `DOM Storage` if JavaScript is enabled.
1604         toggleDomStorageMenuItem.setEnabled(javaScriptEnabled);
1605
1606         // Enable `Clear Cookies` if there are any.
1607         clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
1608
1609         // Get a count of the number of files in the `Local Storage` directory.
1610         File localStorageDirectory = new File (privateDataDirectoryString + "/app_webview/Local Storage/");
1611         int localStorageDirectoryNumberOfFiles = 0;
1612         if (localStorageDirectory.exists()) {
1613             localStorageDirectoryNumberOfFiles = localStorageDirectory.list().length;
1614         }
1615
1616         // Get a count of the number of files in the `IndexedDB` directory.
1617         File indexedDBDirectory = new File (privateDataDirectoryString + "/app_webview/IndexedDB");
1618         int indexedDBDirectoryNumberOfFiles = 0;
1619         if (indexedDBDirectory.exists()) {
1620             indexedDBDirectoryNumberOfFiles = indexedDBDirectory.list().length;
1621         }
1622
1623         // Enable `Clear DOM Storage` if there is any.
1624         clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
1625
1626         // Enable `Clear Form Data` is there is any.
1627         WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(this);
1628         clearFormDataMenuItem.setEnabled(mainWebViewDatabase.hasFormData());
1629
1630         // Enable `Clear Data` if any of the submenu items are enabled.
1631         clearDataMenuItem.setEnabled(clearCookiesMenuItem.isEnabled() || clearDOMStorageMenuItem.isEnabled() || clearFormDataMenuItem.isEnabled());
1632
1633         // Initialize font size variables.
1634         int fontSize = mainWebView.getSettings().getTextZoom();
1635         String fontSizeTitle;
1636         MenuItem selectedFontSizeMenuItem;
1637
1638         // Prepare the font size title and current size menu item.
1639         switch (fontSize) {
1640             case 25:
1641                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.twenty_five_percent);
1642                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_twenty_five_percent);
1643                 break;
1644
1645             case 50:
1646                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.fifty_percent);
1647                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
1648                 break;
1649
1650             case 75:
1651                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.seventy_five_percent);
1652                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_seventy_five_percent);
1653                 break;
1654
1655             case 100:
1656                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
1657                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
1658                 break;
1659
1660             case 125:
1661                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_twenty_five_percent);
1662                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_twenty_five_percent);
1663                 break;
1664
1665             case 150:
1666                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_fifty_percent);
1667                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_fifty_percent);
1668                 break;
1669
1670             case 175:
1671                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_seventy_five_percent);
1672                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_seventy_five_percent);
1673                 break;
1674
1675             case 200:
1676                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.two_hundred_percent);
1677                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_two_hundred_percent);
1678                 break;
1679
1680             default:
1681                 fontSizeTitle = getString(R.string.font_size) + " - " + getString(R.string.one_hundred_percent);
1682                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
1683                 break;
1684         }
1685
1686         // Set the font size title and select the current size menu item.
1687         fontSizeMenuItem.setTitle(fontSizeTitle);
1688         selectedFontSizeMenuItem.setChecked(true);
1689
1690         // Only show `Refresh` if `swipeToRefresh` is disabled.
1691         refreshMenuItem.setVisible(!swipeToRefreshEnabled);
1692
1693         // Run all the other default commands.
1694         super.onPrepareOptionsMenu(menu);
1695
1696         // Display the menu.
1697         return true;
1698     }
1699
1700     @Override
1701     // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
1702     @SuppressLint("SetJavaScriptEnabled")
1703     // removeAllCookies is deprecated, but it is required for API < 21.
1704     @SuppressWarnings("deprecation")
1705     public boolean onOptionsItemSelected(MenuItem menuItem) {
1706         // Get the selected menu item ID.
1707         int menuItemId = menuItem.getItemId();
1708
1709         // Set the commands that relate to the menu entries.
1710         switch (menuItemId) {
1711             case R.id.add_or_edit_domain:
1712                 if (domainSettingsApplied) {  // Edit the current domain settings.
1713                     // Reapply the domain settings on returning to `MainWebViewActivity`.
1714                     reapplyDomainSettingsOnRestart = true;
1715                     currentDomainName = "";
1716
1717                     // Create an intent to launch the domains activity.
1718                     Intent domainsIntent = new Intent(this, DomainsActivity.class);
1719
1720                     // Put extra information instructing the domains activity to directly load the current domain.
1721                     domainsIntent.putExtra("LoadDomain", domainSettingsDatabaseId);
1722
1723                     // Make it so.
1724                     startActivity(domainsIntent);
1725                 } else {  // Add a new domain.
1726                     // Show the add domain `AlertDialog`.
1727                     AppCompatDialogFragment addDomainDialog = new AddDomainDialog();
1728                     addDomainDialog.show(getSupportFragmentManager(), getResources().getString(R.string.add_domain));
1729                 }
1730                 return true;
1731
1732             case R.id.toggle_javascript:
1733                 // Switch the status of javaScriptEnabled.
1734                 javaScriptEnabled = !javaScriptEnabled;
1735
1736                 // Apply the new JavaScript status.
1737                 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
1738
1739                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1740                 updatePrivacyIcons(true);
1741
1742                 // Display a `Snackbar`.
1743                 if (javaScriptEnabled) {  // JavaScrip is enabled.
1744                     Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
1745                 } else if (firstPartyCookiesEnabled) {  // JavaScript is disabled, but first-party cookies are enabled.
1746                     Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
1747                 } else {  // Privacy mode.
1748                     Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
1749                 }
1750
1751                 // Reload the WebView.
1752                 mainWebView.reload();
1753                 return true;
1754
1755             case R.id.toggle_first_party_cookies:
1756                 // Switch the status of firstPartyCookiesEnabled.
1757                 firstPartyCookiesEnabled = !firstPartyCookiesEnabled;
1758
1759                 // Update the menu checkbox.
1760                 menuItem.setChecked(firstPartyCookiesEnabled);
1761
1762                 // Apply the new cookie status.
1763                 cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
1764
1765                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1766                 updatePrivacyIcons(true);
1767
1768                 // Display a `Snackbar`.
1769                 if (firstPartyCookiesEnabled) {  // First-party cookies are enabled.
1770                     Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
1771                 } else if (javaScriptEnabled){  // JavaScript is still enabled.
1772                     Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
1773                 } else {  // Privacy mode.
1774                     Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
1775                 }
1776
1777                 // Reload the WebView.
1778                 mainWebView.reload();
1779                 return true;
1780
1781             case R.id.toggle_third_party_cookies:
1782                 if (Build.VERSION.SDK_INT >= 21) {
1783                     // Switch the status of thirdPartyCookiesEnabled.
1784                     thirdPartyCookiesEnabled = !thirdPartyCookiesEnabled;
1785
1786                     // Update the menu checkbox.
1787                     menuItem.setChecked(thirdPartyCookiesEnabled);
1788
1789                     // Apply the new cookie status.
1790                     cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
1791
1792                     // Display a `Snackbar`.
1793                     if (thirdPartyCookiesEnabled) {
1794                         Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
1795                     } else {
1796                         Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
1797                     }
1798
1799                     // Reload the WebView.
1800                     mainWebView.reload();
1801                 } // Else do nothing because SDK < 21.
1802                 return true;
1803
1804             case R.id.toggle_dom_storage:
1805                 // Switch the status of domStorageEnabled.
1806                 domStorageEnabled = !domStorageEnabled;
1807
1808                 // Update the menu checkbox.
1809                 menuItem.setChecked(domStorageEnabled);
1810
1811                 // Apply the new DOM Storage status.
1812                 mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
1813
1814                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1815                 updatePrivacyIcons(true);
1816
1817                 // Display a `Snackbar`.
1818                 if (domStorageEnabled) {
1819                     Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
1820                 } else {
1821                     Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
1822                 }
1823
1824                 // Reload the WebView.
1825                 mainWebView.reload();
1826                 return true;
1827
1828             case R.id.toggle_save_form_data:
1829                 // Switch the status of saveFormDataEnabled.
1830                 saveFormDataEnabled = !saveFormDataEnabled;
1831
1832                 // Update the menu checkbox.
1833                 menuItem.setChecked(saveFormDataEnabled);
1834
1835                 // Apply the new form data status.
1836                 mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
1837
1838                 // Display a `Snackbar`.
1839                 if (saveFormDataEnabled) {
1840                     Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
1841                 } else {
1842                     Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
1843                 }
1844
1845                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1846                 updatePrivacyIcons(true);
1847
1848                 // Reload the WebView.
1849                 mainWebView.reload();
1850                 return true;
1851
1852             case R.id.clear_cookies:
1853                 Snackbar.make(findViewById(R.id.main_webview), R.string.cookies_deleted, Snackbar.LENGTH_LONG)
1854                         .setAction(R.string.undo, v -> {
1855                             // Do nothing because everything will be handled by `onDismissed()` below.
1856                         })
1857                         .addCallback(new Snackbar.Callback() {
1858                             @Override
1859                             public void onDismissed(Snackbar snackbar, int event) {
1860                                 switch (event) {
1861                                     // The user pushed the `Undo` button.
1862                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
1863                                         // Do nothing.
1864                                         break;
1865
1866                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
1867                                     default:
1868                                         // `cookieManager.removeAllCookie()` varies by SDK.
1869                                         if (Build.VERSION.SDK_INT < 21) {
1870                                             cookieManager.removeAllCookie();
1871                                         } else {
1872                                             // `null` indicates no callback.
1873                                             cookieManager.removeAllCookies(null);
1874                                         }
1875                                 }
1876                             }
1877                         })
1878                         .show();
1879                 return true;
1880
1881             case R.id.clear_dom_storage:
1882                 Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
1883                         .setAction(R.string.undo, v -> {
1884                             // Do nothing because everything will be handled by `onDismissed()` below.
1885                         })
1886                         .addCallback(new Snackbar.Callback() {
1887                             @Override
1888                             public void onDismissed(Snackbar snackbar, int event) {
1889                                 switch (event) {
1890                                     // The user pushed the `Undo` button.
1891                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
1892                                         // Do nothing.
1893                                         break;
1894
1895                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
1896                                     default:
1897                                         // Delete the DOM Storage.
1898                                         WebStorage webStorage = WebStorage.getInstance();
1899                                         webStorage.deleteAllData();
1900
1901                                         // Manually delete the DOM storage files and directories.
1902                                         try {
1903                                             // A `String[]` must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
1904                                             privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
1905
1906                                             // Multiple commands must be used because `Runtime.exec()` does not like `*`.
1907                                             privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
1908                                             privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
1909                                             privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
1910                                             privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
1911                                         } catch (IOException e) {
1912                                             // Do nothing if an error is thrown.
1913                                         }
1914                                 }
1915                             }
1916                         })
1917                         .show();
1918                 return true;
1919
1920             case R.id.clear_form_data:
1921                 Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_deleted, Snackbar.LENGTH_LONG)
1922                         .setAction(R.string.undo, v -> {
1923                             // Do nothing because everything will be handled by `onDismissed()` below.
1924                         })
1925                         .addCallback(new Snackbar.Callback() {
1926                             @Override
1927                             public void onDismissed(Snackbar snackbar, int event) {
1928                                 switch (event) {
1929                                     // The user pushed the `Undo` button.
1930                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
1931                                         // Do nothing.
1932                                         break;
1933
1934                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
1935                                     default:
1936                                         // Delete the form data.
1937                                         WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
1938                                         mainWebViewDatabase.clearFormData();
1939                                 }
1940                             }
1941                         })
1942                         .show();
1943                 return true;
1944
1945             case R.id.font_size_twenty_five_percent:
1946                 mainWebView.getSettings().setTextZoom(25);
1947                 return true;
1948
1949             case R.id.font_size_fifty_percent:
1950                 mainWebView.getSettings().setTextZoom(50);
1951                 return true;
1952
1953             case R.id.font_size_seventy_five_percent:
1954                 mainWebView.getSettings().setTextZoom(75);
1955                 return true;
1956
1957             case R.id.font_size_one_hundred_percent:
1958                 mainWebView.getSettings().setTextZoom(100);
1959                 return true;
1960
1961             case R.id.font_size_one_hundred_twenty_five_percent:
1962                 mainWebView.getSettings().setTextZoom(125);
1963                 return true;
1964
1965             case R.id.font_size_one_hundred_fifty_percent:
1966                 mainWebView.getSettings().setTextZoom(150);
1967                 return true;
1968
1969             case R.id.font_size_one_hundred_seventy_five_percent:
1970                 mainWebView.getSettings().setTextZoom(175);
1971                 return true;
1972
1973             case R.id.font_size_two_hundred_percent:
1974                 mainWebView.getSettings().setTextZoom(200);
1975                 return true;
1976
1977             case R.id.display_images:
1978                 if (mainWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
1979                     mainWebView.getSettings().setLoadsImagesAutomatically(false);
1980                     mainWebView.reload();
1981                 } else {  // Images are not currently loaded automatically.
1982                     mainWebView.getSettings().setLoadsImagesAutomatically(true);
1983                 }
1984
1985                 // Set `onTheFlyDisplayImagesSet`.
1986                 onTheFlyDisplayImagesSet = true;
1987                 return true;
1988
1989             case R.id.share:
1990                 // Setup the share string.
1991                 String shareString = webViewTitle + " – " + urlTextBox.getText().toString();
1992
1993                 // Create the share intent.
1994                 Intent shareIntent = new Intent();
1995                 shareIntent.setAction(Intent.ACTION_SEND);
1996                 shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
1997                 shareIntent.setType("text/plain");
1998
1999                 // Make it so.
2000                 startActivity(Intent.createChooser(shareIntent, "Share URL"));
2001                 return true;
2002
2003             case R.id.find_on_page:
2004                 // Hide the URL app bar.
2005                 supportAppBar.setVisibility(View.GONE);
2006
2007                 // Show the Find on Page `RelativeLayout`.
2008                 findOnPageLinearLayout.setVisibility(View.VISIBLE);
2009
2010                 // Display the keyboard.  We have to wait 200 ms before running the command to work around a bug in Android.
2011                 // http://stackoverflow.com/questions/5520085/android-show-softkeyboard-with-showsoftinput-is-not-working
2012                 findOnPageEditText.postDelayed(() -> {
2013                     // Set the focus on `findOnPageEditText`.
2014                     findOnPageEditText.requestFocus();
2015
2016                     // Display the keyboard.  `0` sets no input flags.
2017                     inputMethodManager.showSoftInput(findOnPageEditText, 0);
2018                 }, 200);
2019                 return true;
2020
2021             case R.id.print:
2022                 // Get a `PrintManager` instance.
2023                 PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
2024
2025                 // Convert `mainWebView` to `printDocumentAdapter`.
2026                 PrintDocumentAdapter printDocumentAdapter = mainWebView.createPrintDocumentAdapter();
2027
2028                 // Remove the lint error below that `printManager` might be `null`.
2029                 assert printManager != null;
2030
2031                 // Print the document.  The print attributes are `null`.
2032                 printManager.print(getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
2033                 return true;
2034
2035             case R.id.view_source:
2036                 // Launch the Vew Source activity.
2037                 Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
2038                 startActivity(viewSourceIntent);
2039                 return true;
2040
2041             case R.id.add_to_homescreen:
2042                 // Show the `CreateHomeScreenShortcutDialog` `AlertDialog` and name this instance `R.string.create_shortcut`.
2043                 AppCompatDialogFragment createHomeScreenShortcutDialogFragment = new CreateHomeScreenShortcutDialog();
2044                 createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
2045
2046                 //Everything else will be handled by `CreateHomeScreenShortcutDialog` and the associated listener below.
2047                 return true;
2048
2049             case R.id.refresh:
2050                 mainWebView.reload();
2051                 return true;
2052
2053             default:
2054                 // Don't consume the event.
2055                 return super.onOptionsItemSelected(menuItem);
2056         }
2057     }
2058
2059     // removeAllCookies is deprecated, but it is required for API < 21.
2060     @SuppressWarnings("deprecation")
2061     @Override
2062     public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
2063         int menuItemId = menuItem.getItemId();
2064
2065         switch (menuItemId) {
2066             case R.id.home:
2067                 loadUrl(homepage);
2068                 break;
2069
2070             case R.id.back:
2071                 if (mainWebView.canGoBack()) {
2072                     // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
2073                     navigatingHistory = true;
2074
2075                     // Load the previous website in the history.
2076                     mainWebView.goBack();
2077                 }
2078                 break;
2079
2080             case R.id.forward:
2081                 if (mainWebView.canGoForward()) {
2082                     // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
2083                     navigatingHistory = true;
2084
2085                     // Load the next website in the history.
2086                     mainWebView.goForward();
2087                 }
2088                 break;
2089
2090             case R.id.history:
2091                 // Get the `WebBackForwardList`.
2092                 WebBackForwardList webBackForwardList = mainWebView.copyBackForwardList();
2093
2094                 // Show the `UrlHistoryDialog` `AlertDialog` and name this instance `R.string.history`.  `this` is the `Context`.
2095                 AppCompatDialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(this, webBackForwardList);
2096                 urlHistoryDialogFragment.show(getSupportFragmentManager(), getString(R.string.history));
2097                 break;
2098
2099             case R.id.downloads:
2100                 // Launch the system Download Manager.
2101                 Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
2102
2103                 // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
2104                 downloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
2105
2106                 startActivity(downloadManagerIntent);
2107                 break;
2108
2109             case R.id.domains:
2110                 // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
2111                 reapplyDomainSettingsOnRestart = true;
2112                 currentDomainName = "";
2113
2114                 // Launch `DomainsActivity`.
2115                 Intent domainsIntent = new Intent(this, DomainsActivity.class);
2116                 startActivity(domainsIntent);
2117                 break;
2118
2119             case R.id.settings:
2120                 // Set the flag to reapply app settings on restart when returning from Settings.
2121                 reapplyAppSettingsOnRestart = true;
2122
2123                 // Set the flag to reapply the domain settings on restart when returning from Settings.
2124                 reapplyDomainSettingsOnRestart = true;
2125                 currentDomainName = "";
2126
2127                 // Launch `SettingsActivity`.
2128                 Intent settingsIntent = new Intent(this, SettingsActivity.class);
2129                 startActivity(settingsIntent);
2130                 break;
2131
2132             case R.id.guide:
2133                 // Launch `GuideActivity`.
2134                 Intent guideIntent = new Intent(this, GuideActivity.class);
2135                 startActivity(guideIntent);
2136                 break;
2137
2138             case R.id.about:
2139                 // Launch `AboutActivity`.
2140                 Intent aboutIntent = new Intent(this, AboutActivity.class);
2141                 startActivity(aboutIntent);
2142                 break;
2143
2144             case R.id.clearAndExit:
2145                 // Get a handle for `sharedPreferences`.  `this` references the current context.
2146                 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
2147
2148                 boolean clearEverything = sharedPreferences.getBoolean("clear_everything", true);
2149
2150                 // Clear cookies.
2151                 if (clearEverything || sharedPreferences.getBoolean("clear_cookies", true)) {
2152                     // The command to remove cookies changed slightly in API 21.
2153                     if (Build.VERSION.SDK_INT >= 21) {
2154                         cookieManager.removeAllCookies(null);
2155                     } else {
2156                         cookieManager.removeAllCookie();
2157                     }
2158
2159                     // Manually delete the cookies database, as `CookieManager` sometimes will not flush its changes to disk before `System.exit(0)` is run.
2160                     try {
2161                         // We have to use two commands because `Runtime.exec()` does not like `*`.
2162                         privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies");
2163                         privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies-journal");
2164                     } catch (IOException e) {
2165                         // Do nothing if an error is thrown.
2166                     }
2167                 }
2168
2169                 // Clear DOM storage.
2170                 if (clearEverything || sharedPreferences.getBoolean("clear_dom_storage", true)) {
2171                     // Ask `WebStorage` to clear the DOM storage.
2172                     WebStorage webStorage = WebStorage.getInstance();
2173                     webStorage.deleteAllData();
2174
2175                     // Manually delete the DOM storage files and directories, as `WebStorage` sometimes will not flush its changes to disk before `System.exit(0)` is run.
2176                     try {
2177                         // A `String[]` must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
2178                         privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
2179
2180                         // Multiple commands must be used because `Runtime.exec()` does not like `*`.
2181                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
2182                         privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
2183                         privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
2184                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
2185                     } catch (IOException e) {
2186                         // Do nothing if an error is thrown.
2187                     }
2188                 }
2189
2190                 // Clear form data.
2191                 if (clearEverything || sharedPreferences.getBoolean("clear_form_data", true)) {
2192                     WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
2193                     webViewDatabase.clearFormData();
2194
2195                     // Manually delete the form data database, as `WebViewDatabase` sometimes will not flush its changes to disk before `System.exit(0)` is run.
2196                     try {
2197                         // We have to use a `String[]` because the database contains a space and `Runtime.exec` will not escape the string correctly otherwise.
2198                         privacyBrowserRuntime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data"});
2199                         privacyBrowserRuntime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data-journal"});
2200                     } catch (IOException e) {
2201                         // Do nothing if an error is thrown.
2202                     }
2203                 }
2204
2205                 // Clear the cache.
2206                 if (clearEverything || sharedPreferences.getBoolean("clear_cache", true)) {
2207                     // `true` includes disk files.
2208                     mainWebView.clearCache(true);
2209
2210                     // Manually delete the cache directories.
2211                     try {
2212                         // Delete the main cache directory.
2213                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
2214                         // Delete the secondary `Service Worker` cache directory.
2215                         // We have to use a `String[]` because the directory contains a space and `Runtime.exec` will not escape the string correctly otherwise.
2216                         privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
2217                     } catch (IOException e) {
2218                         // Do nothing if an error is thrown.
2219                     }
2220                 }
2221
2222                 // Clear SSL certificate preferences.
2223                 mainWebView.clearSslPreferences();
2224
2225                 // Clear the back/forward history.
2226                 mainWebView.clearHistory();
2227
2228                 // Clear `formattedUrlString`.
2229                 formattedUrlString = null;
2230
2231                 // Clear `customHeaders`.
2232                 customHeaders.clear();
2233
2234                 // Detach all views from `mainWebViewRelativeLayout`.
2235                 mainWebViewRelativeLayout.removeAllViews();
2236
2237                 // Destroy the internal state of `mainWebView`.
2238                 mainWebView.destroy();
2239
2240                 // Manually delete the `app_webview` folder, which contains the cookies, DOM storage, form data, and `Service Worker` cache.
2241                 // See `https://code.google.com/p/android/issues/detail?id=233826&thanks=233826&ts=1486670530`.
2242                 if (clearEverything) {
2243                     try {
2244                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview");
2245                     } catch (IOException e) {
2246                         // Do nothing if an error is thrown.
2247                     }
2248                 }
2249
2250                 // Close Privacy Browser.  `finishAndRemoveTask` also removes Privacy Browser from the recent app list.
2251                 if (Build.VERSION.SDK_INT >= 21) {
2252                     finishAndRemoveTask();
2253                 } else {
2254                     finish();
2255                 }
2256
2257                 // Remove the terminated program from RAM.  The status code is `0`.
2258                 System.exit(0);
2259                 break;
2260         }
2261
2262         // Close the navigation drawer.
2263         drawerLayout.closeDrawer(GravityCompat.START);
2264         return true;
2265     }
2266
2267     @Override
2268     public void onPostCreate(Bundle savedInstanceState) {
2269         super.onPostCreate(savedInstanceState);
2270
2271         // Sync the state of the DrawerToggle after onRestoreInstanceState has finished.
2272         drawerToggle.syncState();
2273     }
2274
2275     @Override
2276     public void onConfigurationChanged(Configuration newConfig) {
2277         super.onConfigurationChanged(newConfig);
2278
2279         // Reload the ad for the free flavor if we are not in full screen mode.
2280         if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
2281             // Reload the ad.
2282             BannerAd.reloadAfterRotate(adView, getApplicationContext(), getString(R.string.ad_id));
2283
2284             // Reinitialize the `adView` variable, as the `View` will have been removed and re-added by `BannerAd.reloadAfterRotate()`.
2285             adView = findViewById(R.id.adview);
2286         }
2287
2288         // `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:
2289         // https://code.google.com/p/android/issues/detail?id=20493#c8
2290         // ActivityCompat.invalidateOptionsMenu(this);
2291     }
2292
2293     @Override
2294     public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
2295         // Store the `HitTestResult`.
2296         final WebView.HitTestResult hitTestResult = mainWebView.getHitTestResult();
2297
2298         // Create strings.
2299         final String imageUrl;
2300         final String linkUrl;
2301
2302         // Get a handle for the `ClipboardManager`.
2303         final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
2304
2305         // Remove the lint errors below that `clipboardManager` might be `null`.
2306         assert clipboardManager != null;
2307
2308         switch (hitTestResult.getType()) {
2309             // `SRC_ANCHOR_TYPE` is a link.
2310             case WebView.HitTestResult.SRC_ANCHOR_TYPE:
2311                 // Get the target URL.
2312                 linkUrl = hitTestResult.getExtra();
2313
2314                 // Set the target URL as the title of the `ContextMenu`.
2315                 menu.setHeaderTitle(linkUrl);
2316
2317                 // Add a `Load URL` entry.
2318                 menu.add(R.string.load_url).setOnMenuItemClickListener(item -> {
2319                     loadUrl(linkUrl);
2320                     return false;
2321                 });
2322
2323                 // Add a `Copy URL` entry.
2324                 menu.add(R.string.copy_url).setOnMenuItemClickListener(item -> {
2325                     // Save the link URL in a `ClipData`.
2326                     ClipData srcAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), linkUrl);
2327
2328                     // Set the `ClipData` as the clipboard's primary clip.
2329                     clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
2330                     return false;
2331                 });
2332
2333                 // Add a `Cancel` entry, which by default closes the `ContextMenu`.
2334                 menu.add(R.string.cancel);
2335                 break;
2336
2337             case WebView.HitTestResult.EMAIL_TYPE:
2338                 // Get the target URL.
2339                 linkUrl = hitTestResult.getExtra();
2340
2341                 // Set the target URL as the title of the `ContextMenu`.
2342                 menu.setHeaderTitle(linkUrl);
2343
2344                 // Add a `Write Email` entry.
2345                 menu.add(R.string.write_email).setOnMenuItemClickListener(item -> {
2346                     // We use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
2347                     Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
2348
2349                     // Parse the url and set it as the data for the `Intent`.
2350                     emailIntent.setData(Uri.parse("mailto:" + linkUrl));
2351
2352                     // `FLAG_ACTIVITY_NEW_TASK` opens the email program in a new task instead as part of Privacy Browser.
2353                     emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
2354
2355                     // Make it so.
2356                     startActivity(emailIntent);
2357                     return false;
2358                 });
2359
2360                 // Add a `Copy Email Address` entry.
2361                 menu.add(R.string.copy_email_address).setOnMenuItemClickListener(item -> {
2362                     // Save the email address in a `ClipData`.
2363                     ClipData srcEmailTypeClipData = ClipData.newPlainText(getString(R.string.email_address), linkUrl);
2364
2365                     // Set the `ClipData` as the clipboard's primary clip.
2366                     clipboardManager.setPrimaryClip(srcEmailTypeClipData);
2367                     return false;
2368                 });
2369
2370                 // Add a `Cancel` entry, which by default closes the `ContextMenu`.
2371                 menu.add(R.string.cancel);
2372                 break;
2373
2374             // `IMAGE_TYPE` is an image.
2375             case WebView.HitTestResult.IMAGE_TYPE:
2376                 // Get the image URL.
2377                 imageUrl = hitTestResult.getExtra();
2378
2379                 // Set the image URL as the title of the `ContextMenu`.
2380                 menu.setHeaderTitle(imageUrl);
2381
2382                 // Add a `View Image` entry.
2383                 menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
2384                     loadUrl(imageUrl);
2385                     return false;
2386                 });
2387
2388                 // Add a `Download Image` entry.
2389                 menu.add(R.string.download_image).setOnMenuItemClickListener((MenuItem item) -> {
2390                     // Check to see if the WRITE_EXTERNAL_STORAGE permission has already been granted.
2391                     if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {
2392                         // The WRITE_EXTERNAL_STORAGE permission needs to be requested.
2393
2394                         // Store the image URL for use by `onRequestPermissionResult()`.
2395                         downloadImageUrl = imageUrl;
2396
2397                         // Show a dialog if the user has previously denied the permission.
2398                         if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
2399                             // Get a handle for the download location permission alert dialog and set the download type to DOWNLOAD_IMAGE.
2400                             DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_IMAGE);
2401
2402                             // Show the download location permission alert dialog.  The permission will be requested when the dialog is closed.
2403                             downloadLocationPermissionDialogFragment.show(getFragmentManager(), getString(R.string.download_location));
2404                         } else {  // Show the permission request directly.
2405                             // Request the permission.  The download dialog will be launched by `onRequestPermissionResult().
2406                             ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
2407                         }
2408                     } else {  // The WRITE_EXTERNAL_STORAGE permission has already been granted.
2409                         // Get a handle for the download image alert dialog.
2410                         AppCompatDialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
2411
2412                         // Show the download image alert dialog.
2413                         downloadImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
2414                     }
2415                     return false;
2416                 });
2417
2418                 // Add a `Copy URL` entry.
2419                 menu.add(R.string.copy_url).setOnMenuItemClickListener(item -> {
2420                     // Save the image URL in a `ClipData`.
2421                     ClipData srcImageTypeClipData = ClipData.newPlainText(getString(R.string.url), imageUrl);
2422
2423                     // Set the `ClipData` as the clipboard's primary clip.
2424                     clipboardManager.setPrimaryClip(srcImageTypeClipData);
2425                     return false;
2426                 });
2427
2428                 // Add a `Cancel` entry, which by default closes the `ContextMenu`.
2429                 menu.add(R.string.cancel);
2430                 break;
2431
2432
2433             // `SRC_IMAGE_ANCHOR_TYPE` is an image that is also a link.
2434             case WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE:
2435                 // Get the image URL.
2436                 imageUrl = hitTestResult.getExtra();
2437
2438                 // Set the image URL as the title of the `ContextMenu`.
2439                 menu.setHeaderTitle(imageUrl);
2440
2441                 // Add a `View Image` entry.
2442                 menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
2443                     loadUrl(imageUrl);
2444                     return false;
2445                 });
2446
2447                 // Add a `Download Image` entry.
2448                 menu.add(R.string.download_image).setOnMenuItemClickListener((MenuItem item) -> {
2449                     // Check to see if the WRITE_EXTERNAL_STORAGE permission has already been granted.
2450                     if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {
2451                         // The WRITE_EXTERNAL_STORAGE permission needs to be requested.
2452
2453                         // Store the image URL for use by `onRequestPermissionResult()`.
2454                         downloadImageUrl = imageUrl;
2455
2456                         // Show a dialog if the user has previously denied the permission.
2457                         if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {  // Show a dialog explaining the request first.
2458                             // Get a handle for the download location permission alert dialog and set the download type to DOWNLOAD_IMAGE.
2459                             DialogFragment downloadLocationPermissionDialogFragment = DownloadLocationPermissionDialog.downloadType(DownloadLocationPermissionDialog.DOWNLOAD_IMAGE);
2460
2461                             // Show the download location permission alert dialog.  The permission will be requested when the dialog is closed.
2462                             downloadLocationPermissionDialogFragment.show(getFragmentManager(), getString(R.string.download_location));
2463                         } else {  // Show the permission request directly.
2464                             // Request the permission.  The download dialog will be launched by `onRequestPermissionResult().
2465                             ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
2466                         }
2467                     } else {  // The WRITE_EXTERNAL_STORAGE permission has already been granted.
2468                         // Get a handle for the download image alert dialog.
2469                         AppCompatDialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
2470
2471                         // Show the download image alert dialog.
2472                         downloadImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
2473                     }
2474                     return false;
2475                 });
2476
2477                 // Add a `Copy URL` entry.
2478                 menu.add(R.string.copy_url).setOnMenuItemClickListener(item -> {
2479                     // Save the image URL in a `ClipData`.
2480                     ClipData srcImageAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), imageUrl);
2481
2482                     // Set the `ClipData` as the clipboard's primary clip.
2483                     clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
2484                     return false;
2485                 });
2486
2487                 // Add a `Cancel` entry, which by default closes the `ContextMenu`.
2488                 menu.add(R.string.cancel);
2489                 break;
2490         }
2491     }
2492
2493     @Override
2494     public void onAddDomain(AppCompatDialogFragment dialogFragment) {
2495         // Reapply the domain settings on returning to `MainWebViewActivity`.
2496         reapplyDomainSettingsOnRestart = true;
2497         currentDomainName = "";
2498
2499         // Get the new domain name `String` from `dialogFragment`.
2500         EditText domainNameEditText = dialogFragment.getDialog().findViewById(R.id.domain_name_edittext);
2501         String domainNameString = domainNameEditText.getText().toString();
2502
2503         // Initialize the database handler.  `this` specifies the context.  The two `nulls` do not specify the database name or a `CursorFactory`.
2504         // The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
2505         DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
2506
2507         // Create the domain and store the database ID in `currentDomainDatabaseId`.
2508         int newDomainDatabaseId = domainsDatabaseHelper.addDomain(domainNameString);
2509
2510         // Create an intent to launch the domains activity.
2511         Intent domainsIntent = new Intent(this, DomainsActivity.class);
2512
2513         // Put extra information instructing the domains activity to directly load the current domain.
2514         domainsIntent.putExtra("LoadDomain", newDomainDatabaseId);
2515
2516         // Make it so.
2517         startActivity(domainsIntent);
2518     }
2519
2520     @Override
2521     public void onCreateBookmark(AppCompatDialogFragment dialogFragment) {
2522         // Get the `EditTexts` from the `dialogFragment`.
2523         EditText createBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
2524         EditText createBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
2525
2526         // Extract the strings from the `EditTexts`.
2527         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
2528         String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
2529
2530         // Convert the favoriteIcon Bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2531         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
2532         favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
2533         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
2534
2535         // Display the new bookmark below the current items in the (0 indexed) list.
2536         int newBookmarkDisplayOrder = bookmarksListView.getCount();
2537
2538         // Create the bookmark.
2539         bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
2540
2541         // Update `bookmarksCursor` with the current contents of this folder.
2542         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
2543
2544         // Update the `ListView`.
2545         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
2546
2547         // Scroll to the new bookmark.
2548         bookmarksListView.setSelection(newBookmarkDisplayOrder);
2549     }
2550
2551     @Override
2552     public void onCreateBookmarkFolder(AppCompatDialogFragment dialogFragment) {
2553         // Get handles for the views in `dialogFragment`.
2554         EditText createFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.create_folder_name_edittext);
2555         RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon_radiobutton);
2556         ImageView folderIconImageView = dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon);
2557
2558         // Get new folder name string.
2559         String folderNameString = createFolderNameEditText.getText().toString();
2560
2561         // Get the new folder icon `Bitmap`.
2562         Bitmap folderIconBitmap;
2563         if (defaultFolderIconRadioButton.isChecked()) {  // Use the default folder icon.
2564             // Get the default folder icon and convert it to a `Bitmap`.
2565             Drawable folderIconDrawable = folderIconImageView.getDrawable();
2566             BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
2567             folderIconBitmap = folderIconBitmapDrawable.getBitmap();
2568         } else {  // Use the `WebView` favorite icon.
2569             folderIconBitmap = favoriteIconBitmap;
2570         }
2571
2572         // Convert `folderIconBitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
2573         ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
2574         folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
2575         byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
2576
2577         // Move all the bookmarks down one in the display order.
2578         for (int i = 0; i < bookmarksListView.getCount(); i++) {
2579             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
2580             bookmarksDatabaseHelper.updateDisplayOrder(databaseId, i + 1);
2581         }
2582
2583         // Create the folder, which will be placed at the top of the `ListView`.
2584         bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
2585
2586         // Update `bookmarksCursor` with the current contents of this folder.
2587         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
2588
2589         // Update the `ListView`.
2590         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
2591
2592         // Scroll to the new folder.
2593         bookmarksListView.setSelection(0);
2594     }
2595
2596     @Override
2597     public void onCreateHomeScreenShortcut(AppCompatDialogFragment dialogFragment) {
2598         // Get the shortcut name.
2599         EditText shortcutNameEditText = dialogFragment.getDialog().findViewById(R.id.shortcut_name_edittext);
2600         String shortcutNameString = shortcutNameEditText.getText().toString();
2601
2602         // Convert the favorite icon bitmap to an `Icon`.  `IconCompat` is required until API >= 26.
2603         IconCompat favoriteIcon = IconCompat.createWithBitmap(favoriteIconBitmap);
2604
2605         // Setup the shortcut intent.
2606         Intent shortcutIntent = new Intent();
2607         shortcutIntent.setAction(Intent.ACTION_VIEW);
2608         shortcutIntent.setData(Uri.parse(formattedUrlString));
2609
2610         // Create a shortcut info builder.  The shortcut name becomes the shortcut ID.
2611         ShortcutInfoCompat.Builder shortcutInfoBuilder = new ShortcutInfoCompat.Builder(this, shortcutNameString);
2612
2613         // Add the required fields to the shortcut info builder.
2614         shortcutInfoBuilder.setIcon(favoriteIcon);
2615         shortcutInfoBuilder.setIntent(shortcutIntent);
2616         shortcutInfoBuilder.setShortLabel(shortcutNameString);
2617
2618         // Request the pin.  `ShortcutManagerCompat` can be switched to `ShortcutManager` once API >= 26.
2619         ShortcutManagerCompat.requestPinShortcut(this, shortcutInfoBuilder.build(), null);
2620     }
2621
2622     @Override
2623     public void onCloseDownloadLocationPermissionDialog(int downloadType) {
2624         switch (downloadType) {
2625             case DownloadLocationPermissionDialog.DOWNLOAD_FILE:
2626                 // Request the WRITE_EXTERNAL_STORAGE permission with a file request code.
2627                 ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_FILE_REQUEST_CODE);
2628                 break;
2629
2630             case DownloadLocationPermissionDialog.DOWNLOAD_IMAGE:
2631                 // Request the WRITE_EXTERNAL_STORAGE permission with an image request code.
2632                 ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, DOWNLOAD_IMAGE_REQUEST_CODE);
2633                 break;
2634         }
2635     }
2636
2637     @Override
2638     public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults) {
2639         switch (requestCode) {
2640             case DOWNLOAD_FILE_REQUEST_CODE:
2641                 // Show the download file alert dialog.  When the dialog closes, the correct command will be used based on the permission status.
2642                 AppCompatDialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(downloadUrl, downloadContentDisposition, downloadContentLength);
2643
2644                 // On API 23, displaying the fragment must be delayed or the app will crash.
2645                 if (Build.VERSION.SDK_INT == 23) {
2646                     new Handler().postDelayed(() -> downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download)), 500);
2647                 } else {
2648                     downloadFileDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
2649                 }
2650
2651                 // Reset the download variables.
2652                 downloadUrl = "";
2653                 downloadContentDisposition = "";
2654                 downloadContentLength = 0;
2655                 break;
2656
2657             case DOWNLOAD_IMAGE_REQUEST_CODE:
2658                 // Show the download image alert dialog.  When the dialog closes, the correct command will be used based on the permission status.
2659                 AppCompatDialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(downloadImageUrl);
2660
2661                 // On API 23, displaying the fragment must be delayed or the app will crash.
2662                 if (Build.VERSION.SDK_INT == 23) {
2663                     new Handler().postDelayed(() -> downloadImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.download)), 500);
2664                 } else {
2665                     downloadImageDialogFragment.show(getSupportFragmentManager(), getString(R.string.download));
2666                 }
2667
2668                 // Reset the image URL variable.
2669                 downloadImageUrl = "";
2670                 break;
2671         }
2672     }
2673
2674     @Override
2675     public void onDownloadImage(AppCompatDialogFragment dialogFragment, String imageUrl) {
2676         // Download the image if it has an HTTP or HTTPS URI.
2677         if (imageUrl.startsWith("http")) {
2678             // Get a handle for the system `DOWNLOAD_SERVICE`.
2679             DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
2680
2681             // Parse `imageUrl`.
2682             DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(imageUrl));
2683
2684             // Pass cookies to download manager if cookies are enabled.  This is required to download images from websites that require a login.
2685             // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
2686             if (firstPartyCookiesEnabled) {
2687                 // Get the cookies for `imageUrl`.
2688                 String cookies = cookieManager.getCookie(imageUrl);
2689
2690                 // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
2691                 downloadRequest.addRequestHeader("Cookie", cookies);
2692             }
2693
2694             // Get the file name from the dialog fragment.
2695             EditText downloadImageNameEditText = dialogFragment.getDialog().findViewById(R.id.download_image_name);
2696             String imageName = downloadImageNameEditText.getText().toString();
2697
2698             // Specify the download location.
2699             if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // External write permission granted.
2700                 // Download to the public download directory.
2701                 downloadRequest.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, imageName);
2702             } else {  // External write permission denied.
2703                 // Download to the app's external download directory.
2704                 downloadRequest.setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, imageName);
2705             }
2706
2707             // Allow `MediaScanner` to index the download if it is a media file.
2708             downloadRequest.allowScanningByMediaScanner();
2709
2710             // Add the URL as the description for the download.
2711             downloadRequest.setDescription(imageUrl);
2712
2713             // Show the download notification after the download is completed.
2714             downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
2715
2716             // Remove the lint warning below that `downloadManager` might be `null`.
2717             assert downloadManager != null;
2718
2719             // Initiate the download.
2720             downloadManager.enqueue(downloadRequest);
2721         } else {  // The image is not an HTTP or HTTPS URI.
2722             Snackbar.make(mainWebView, R.string.cannot_download_image, Snackbar.LENGTH_INDEFINITE).show();
2723         }
2724     }
2725
2726     @Override
2727     public void onDownloadFile(AppCompatDialogFragment dialogFragment, String downloadUrl) {
2728         // Download the file if it has an HTTP or HTTPS URI.
2729         if (downloadUrl.startsWith("http")) {
2730             // Get a handle for the system `DOWNLOAD_SERVICE`.
2731             DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
2732
2733             // Parse `downloadUrl`.
2734             DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(downloadUrl));
2735
2736             // Pass cookies to download manager if cookies are enabled.  This is required to download files from websites that require a login.
2737             // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
2738             if (firstPartyCookiesEnabled) {
2739                 // Get the cookies for `downloadUrl`.
2740                 String cookies = cookieManager.getCookie(downloadUrl);
2741
2742                 // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
2743                 downloadRequest.addRequestHeader("Cookie", cookies);
2744             }
2745
2746             // Get the file name from the dialog fragment.
2747             EditText downloadFileNameEditText = dialogFragment.getDialog().findViewById(R.id.download_file_name);
2748             String fileName = downloadFileNameEditText.getText().toString();
2749
2750             // Specify the download location.
2751             if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {  // External write permission granted.
2752                 // Download to the public download directory.
2753                 downloadRequest.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName);
2754             } else {  // External write permission denied.
2755                 // Download to the app's external download directory.
2756                 downloadRequest.setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, fileName);
2757             }
2758
2759             // Allow `MediaScanner` to index the download if it is a media file.
2760             downloadRequest.allowScanningByMediaScanner();
2761
2762             // Add the URL as the description for the download.
2763             downloadRequest.setDescription(downloadUrl);
2764
2765             // Show the download notification after the download is completed.
2766             downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
2767
2768             // Remove the lint warning below that `downloadManager` might be `null`.
2769             assert downloadManager != null;
2770
2771             // Initiate the download.
2772             downloadManager.enqueue(downloadRequest);
2773         } else {  // The download is not an HTTP or HTTPS URI.
2774             Snackbar.make(mainWebView, R.string.cannot_download_file, Snackbar.LENGTH_INDEFINITE).show();
2775         }
2776     }
2777
2778     @Override
2779     public void onSaveBookmark(AppCompatDialogFragment dialogFragment, int selectedBookmarkDatabaseId) {
2780         // Get handles for the views from `dialogFragment`.
2781         EditText editBookmarkNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
2782         EditText editBookmarkUrlEditText = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
2783         RadioButton currentBookmarkIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
2784
2785         // Store the bookmark strings.
2786         String bookmarkNameString = editBookmarkNameEditText.getText().toString();
2787         String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
2788
2789         // Update the bookmark.
2790         if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
2791             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
2792         } else {  // Update the bookmark using the `WebView` favorite icon.
2793             // Convert the favorite icon to a byte array.  `0` is for lossless compression (the only option for a PNG).
2794             ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
2795             favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
2796             byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
2797
2798             //  Update the bookmark and the favorite icon.
2799             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
2800         }
2801
2802         // Update `bookmarksCursor` with the current contents of this folder.
2803         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
2804
2805         // Update the `ListView`.
2806         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
2807     }
2808
2809     @Override
2810     public void onSaveBookmarkFolder(AppCompatDialogFragment dialogFragment, int selectedFolderDatabaseId) {
2811         // Get handles for the views from `dialogFragment`.
2812         EditText editFolderNameEditText = dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
2813         RadioButton currentFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
2814         RadioButton defaultFolderIconRadioButton = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
2815         ImageView folderIconImageView = dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_imageview);
2816
2817         // Get the new folder name.
2818         String newFolderNameString = editFolderNameEditText.getText().toString();
2819
2820         // Check if the favorite icon has changed.
2821         if (currentFolderIconRadioButton.isChecked()) {  // Only the name has changed.
2822             // Update the name in the database.
2823             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
2824         } else if (!currentFolderIconRadioButton.isChecked() && newFolderNameString.equals(oldFolderNameString)) {  // Only the icon has changed.
2825             // Get the new folder icon `Bitmap`.
2826             Bitmap folderIconBitmap;
2827             if (defaultFolderIconRadioButton.isChecked()) {
2828                 // Get the default folder icon and convert it to a `Bitmap`.
2829                 Drawable folderIconDrawable = folderIconImageView.getDrawable();
2830                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
2831                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
2832             } else {  // Use the `WebView` favorite icon.
2833                 folderIconBitmap = favoriteIconBitmap;
2834             }
2835
2836             // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
2837             ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
2838             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
2839             byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
2840
2841             // Update the folder icon in the database.
2842             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, folderIconByteArray);
2843         } else {  // The folder icon and the name have changed.
2844             // Get the new folder icon `Bitmap`.
2845             Bitmap folderIconBitmap;
2846             if (defaultFolderIconRadioButton.isChecked()) {
2847                 // Get the default folder icon and convert it to a `Bitmap`.
2848                 Drawable folderIconDrawable = folderIconImageView.getDrawable();
2849                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
2850                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
2851             } else {  // Use the `WebView` favorite icon.
2852                 folderIconBitmap = MainWebViewActivity.favoriteIconBitmap;
2853             }
2854
2855             // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
2856             ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
2857             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
2858             byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
2859
2860             // Update the folder name and icon in the database.
2861             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, folderIconByteArray);
2862         }
2863
2864         // Update `bookmarksCursor` with the current contents of this folder.
2865         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(currentBookmarksFolder);
2866
2867         // Update the `ListView`.
2868         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
2869     }
2870
2871     @Override
2872     public void onHttpAuthenticationCancel() {
2873         // Cancel the `HttpAuthHandler`.
2874         httpAuthHandler.cancel();
2875     }
2876
2877     @Override
2878     public void onHttpAuthenticationProceed(AppCompatDialogFragment dialogFragment) {
2879         // Get handles for the `EditTexts`.
2880         EditText usernameEditText = dialogFragment.getDialog().findViewById(R.id.http_authentication_username);
2881         EditText passwordEditText = dialogFragment.getDialog().findViewById(R.id.http_authentication_password);
2882
2883         // Proceed with the HTTP authentication.
2884         httpAuthHandler.proceed(usernameEditText.getText().toString(), passwordEditText.getText().toString());
2885     }
2886
2887     public void viewSslCertificate(View view) {
2888         // Show the `ViewSslCertificateDialog` `AlertDialog` and name this instance `@string/view_ssl_certificate`.
2889         DialogFragment viewSslCertificateDialogFragment = new ViewSslCertificateDialog();
2890         viewSslCertificateDialogFragment.show(getFragmentManager(), getString(R.string.view_ssl_certificate));
2891     }
2892
2893     @Override
2894     public void onSslErrorCancel() {
2895         sslErrorHandler.cancel();
2896     }
2897
2898     @Override
2899     public void onSslErrorProceed() {
2900         sslErrorHandler.proceed();
2901     }
2902
2903     @Override
2904     public void onSslMismatchBack() {
2905         if (mainWebView.canGoBack()) {  // There is a back page in the history.
2906             // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
2907             navigatingHistory = true;
2908
2909             // Go back.
2910             mainWebView.goBack();
2911         } else {  // There are no pages to go back to.
2912             // Load a blank page
2913             loadUrl("");
2914         }
2915     }
2916
2917     @Override
2918     public void onSslMismatchProceed() {
2919         // Do not check the pinned SSL certificate for this domain again until the domain changes.
2920         ignorePinnedSslCertificate = true;
2921     }
2922
2923     @Override
2924     public void onUrlHistoryEntrySelected(int moveBackOrForwardSteps) {
2925         // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
2926         navigatingHistory = true;
2927
2928         // Load the history entry.
2929         mainWebView.goBackOrForward(moveBackOrForwardSteps);