0d8534cbf7a51fffda56048163219219f0160f31
[PrivacyBrowser.git] / app / src / main / java / com / stoutner / privacybrowser / activities / MainWebViewActivity.java
1 /*
2  * Copyright © 2015-2017 Soren Stoutner <soren@stoutner.com>.
3  *
4  * Download cookie code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
5  *
6  * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
7  *
8  * Privacy Browser is free software: you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License as published by
10  * the Free Software Foundation, either version 3 of the License, or
11  * (at your option) any later version.
12  *
13  * Privacy Browser is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
20  */
21
22 package com.stoutner.privacybrowser.activities;
23
24 import android.annotation.SuppressLint;
25 import android.app.DialogFragment;
26 import android.app.DownloadManager;
27 import android.content.BroadcastReceiver;
28 import android.content.ClipData;
29 import android.content.ClipboardManager;
30 import android.content.Context;
31 import android.content.Intent;
32 import android.content.IntentFilter;
33 import android.content.SharedPreferences;
34 import android.content.res.Configuration;
35 import android.database.Cursor;
36 import android.graphics.Bitmap;
37 import android.graphics.drawable.BitmapDrawable;
38 import android.graphics.drawable.Drawable;
39 import android.net.Uri;
40 import android.net.http.SslCertificate;
41 import android.net.http.SslError;
42 import android.os.Build;
43 import android.os.Bundle;
44 import android.preference.PreferenceManager;
45 import android.print.PrintDocumentAdapter;
46 import android.print.PrintManager;
47 import android.support.annotation.NonNull;
48 import android.support.design.widget.CoordinatorLayout;
49 import android.support.design.widget.NavigationView;
50 import android.support.design.widget.Snackbar;
51 import android.support.v4.app.ActivityCompat;
52 import android.support.v4.content.ContextCompat;
53 import android.support.v4.view.GravityCompat;
54 import android.support.v4.widget.DrawerLayout;
55 import android.support.v4.widget.SwipeRefreshLayout;
56 import android.support.v7.app.ActionBar;
57 import android.support.v7.app.ActionBarDrawerToggle;
58 import android.support.v7.app.AppCompatActivity;
59 import android.support.v7.app.AppCompatDialogFragment;
60 import android.support.v7.widget.Toolbar;
61 import android.text.Editable;
62 import android.text.Spanned;
63 import android.text.TextWatcher;
64 import android.text.style.ForegroundColorSpan;
65 import android.util.Patterns;
66 import android.view.ContextMenu;
67 import android.view.GestureDetector;
68 import android.view.KeyEvent;
69 import android.view.Menu;
70 import android.view.MenuItem;
71 import android.view.MotionEvent;
72 import android.view.View;
73 import android.view.WindowManager;
74 import android.view.inputmethod.InputMethodManager;
75 import android.webkit.CookieManager;
76 import android.webkit.DownloadListener;
77 import android.webkit.SslErrorHandler;
78 import android.webkit.WebBackForwardList;
79 import android.webkit.WebChromeClient;
80 import android.webkit.WebResourceResponse;
81 import android.webkit.WebStorage;
82 import android.webkit.WebView;
83 import android.webkit.WebViewClient;
84 import android.webkit.WebViewDatabase;
85 import android.widget.EditText;
86 import android.widget.FrameLayout;
87 import android.widget.ImageView;
88 import android.widget.LinearLayout;
89 import android.widget.ProgressBar;
90 import android.widget.RelativeLayout;
91 import android.widget.TextView;
92
93 import com.stoutner.privacybrowser.BannerAd;
94 import com.stoutner.privacybrowser.BuildConfig;
95 import com.stoutner.privacybrowser.R;
96 import com.stoutner.privacybrowser.dialogs.CreateHomeScreenShortcutDialog;
97 import com.stoutner.privacybrowser.dialogs.DownloadImageDialog;
98 import com.stoutner.privacybrowser.dialogs.UrlHistoryDialog;
99 import com.stoutner.privacybrowser.dialogs.ViewSslCertificateDialog;
100 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
101 import com.stoutner.privacybrowser.helpers.OrbotProxyHelper;
102 import com.stoutner.privacybrowser.dialogs.DownloadFileDialog;
103 import com.stoutner.privacybrowser.dialogs.SslCertificateErrorDialog;
104
105 import java.io.BufferedReader;
106 import java.io.ByteArrayInputStream;
107 import java.io.File;
108 import java.io.IOException;
109 import java.io.InputStreamReader;
110 import java.io.UnsupportedEncodingException;
111 import java.net.MalformedURLException;
112 import java.net.URL;
113 import java.net.URLDecoder;
114 import java.net.URLEncoder;
115 import java.util.HashMap;
116 import java.util.HashSet;
117 import java.util.Map;
118 import java.util.Set;
119
120 // We need to use AppCompatActivity from android.support.v7.app.AppCompatActivity to have access to the SupportActionBar until the minimum API is >= 21.
121 public class MainWebViewActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener, CreateHomeScreenShortcutDialog.CreateHomeScreenSchortcutListener,
122         SslCertificateErrorDialog.SslCertificateErrorListener, DownloadFileDialog.DownloadFileListener, DownloadImageDialog.DownloadImageListener, UrlHistoryDialog.UrlHistoryListener {
123
124     // `darkTheme` is public static so it can be accessed from `AboutActivity`, `GuideActivity`, `AddDomainDialog`, `SettingsActivity`, `DomainsActivity`, `DomainsListFragment`, `BookmarksActivity`, `BookmarksDatabaseViewActivity`,
125     // `CreateBookmarkDialog`, `CreateBookmarkFolderDialog`, `DownloadFileDialog`, `DownloadImageDialog`, `EditBookmarkDialog`, `EditBookmarkFolderDialog`, `MoveToFolderDialog`, `SslCertificateErrorDialog`, `UrlHistoryDialog`, `ViewSslCertificateDialog`,
126     // `CreateHomeScreenShortcutDialog`, and `OrbotProxyHelper`. It is also used in `onCreate()`, `applyAppSettings()`, `applyDomainSettings()`, and `updatePrivacyIcons()`.
127     public static boolean darkTheme;
128
129     // `favoriteIconBitmap` is public static so it can be accessed from `CreateHomeScreenShortcutDialog`, `BookmarksActivity`, `CreateBookmarkDialog`, `CreateBookmarkFolderDialog`, `EditBookmarkDialog`, `EditBookmarkFolderDialog`, `ViewSslCertificateDialog`.
130     // It is also used in `onCreate()`, `onCreateHomeScreenShortcutCreate()`, and `applyDomainSettings`.
131     public static Bitmap favoriteIconBitmap;
132
133     // `formattedUrlString` is public static so it can be accessed from `BookmarksActivity`, `CreateBookmarkDialog`, and `AddDomainDialog`.
134     // It is also used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onCreateHomeScreenShortcutCreate()`, and `loadUrlFromTextBox()`.
135     public static String formattedUrlString;
136
137     // `sslCertificate` is public static so it can be accessed from `ViewSslCertificateDialog`.  It is also used in `onCreate()`.
138     public static SslCertificate sslCertificate;
139
140     // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()`.
141     public static String orbotStatus;
142
143     // `webViewTitle` is public static so it can be accessed from `CreateBookmarkDialog` and `CreateHomeScreenShortcutDialog`.  It is also used in `onCreate()`.
144     public static String webViewTitle;
145
146     // `displayWebpageImagesBoolean` is public static so it can be accessed from `DomainSettingsFragment`.  It is also used in `applyAppSettings()` and `applyDomainSettings()`.
147     public static boolean displayWebpageImagesBoolean;
148
149     // `reloadOnRestartBoolean` is public static so it can be accessed from `SettingsFragment`.  It is also used in `onRestart()`
150     public static boolean reloadOnRestartBoolean;
151
152
153     // `appBar` is used in `onCreate()`, `onOptionsItemSelected()`, `closeFindOnPage()`, and `applyAppSettings()`.
154     private ActionBar appBar;
155
156     // `navigatingHistory` is used in `onCreate()`, `onNavigationItemSelected()`, and `applyDomainSettings()`.
157     private boolean navigatingHistory;
158
159     // `favoriteIconDefaultBitmap` is used in `onCreate()` and `applyDomainSettings`.
160     private Bitmap favoriteIconDefaultBitmap;
161
162     // `drawerLayout` is used in `onCreate()`, `onNewIntent()`, and `onBackPressed()`.
163     private DrawerLayout drawerLayout;
164
165     // `rootCoordinatorLayout` is used in `onCreate()` and `applyAppSettings()`.
166     private CoordinatorLayout rootCoordinatorLayout;
167
168     // `mainWebView` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`, `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`
169     // and `setDisplayWebpageImages()`.
170     private WebView mainWebView;
171
172     // `fullScreenVideoFrameLayout` is used in `onCreate()` and `onConfigurationChanged()`.
173     private FrameLayout fullScreenVideoFrameLayout;
174
175     // `swipeRefreshLayout` is used in `onCreate()`, `onPrepareOptionsMenu`, and `onRestart()`.
176     private SwipeRefreshLayout swipeRefreshLayout;
177
178     // `urlAppBarRelativeLayout` is used in `onCreate()` and `applyDomainSettings()`.
179     private RelativeLayout urlAppBarRelativeLayout;
180
181     // `favoriteIconImageView` is used in `onCreate()` and `applyDomainSettings()`
182     private ImageView favoriteIconImageView;
183
184     // `cookieManager` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`, `loadUrlFromTextBox()`, `onDownloadImage()`, `onDownloadFile()`, and `onRestart()`.
185     private CookieManager cookieManager;
186
187     // `customHeader` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateContextMenu()`, and `loadUrl()`.
188     private final Map<String, String> customHeaders = new HashMap<>();
189
190     // `javaScriptEnabled` is also used in `onCreate()`, `onCreateOptionsMenu()`, `onOptionsItemSelected()`, `loadUrlFromTextBox()`, and `applyAppSettings()`.
191     // It is `Boolean` instead of `boolean` because `applyAppSettings()` needs to know if it is `null`.
192     private Boolean javaScriptEnabled;
193
194     // `firstPartyCookiesEnabled` is used in `onCreate()`, `onCreateOptionsMenu()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onDownloadImage()`, `onDownloadFile()`, and `applyAppSettings()`.
195     private boolean firstPartyCookiesEnabled;
196
197     // `thirdPartyCookiesEnabled` used in `onCreate()`, `onCreateOptionsMenu()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
198     private boolean thirdPartyCookiesEnabled;
199
200     // `domStorageEnabled` is used in `onCreate()`, `onCreateOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
201     private boolean domStorageEnabled;
202
203     // `saveFormDataEnabled` is used in `onCreate()`, `onCreateOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
204     private boolean saveFormDataEnabled;
205
206     // `swipeToRefreshEnabled` is used in `onPrepareOptionsMenu()` and `applyAppSettings()`.
207     private boolean swipeToRefreshEnabled;
208
209     // 'homepage' is used in `onCreate()`, `onNavigationItemSelected()`, and `applyAppSettings()`.
210     private String homepage;
211
212     // `searchURL` is used in `loadURLFromTextBox()` and `applyAppSettings()`.
213     private String searchURL;
214
215     // `adBlockerEnabled` is used in `onCreate()` and `applyAppSettings()`.
216     private boolean adBlockerEnabled;
217
218     // `privacyBrowserRuntime` is used in `onCreate()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
219     private Runtime privacyBrowserRuntime;
220
221     // `incognitoModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
222     private boolean incognitoModeEnabled;
223
224     // `fullScreenBrowsingModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
225     private boolean fullScreenBrowsingModeEnabled;
226
227     // `inFullScreenBrowsingMode` is used in `onCreate()`, `onConfigurationChanged()`, and `applyAppSettings()`.
228     private boolean inFullScreenBrowsingMode;
229
230     // `hideSystemBarsOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
231     private boolean hideSystemBarsOnFullscreen;
232
233     // `translucentNavigationBarOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
234     private boolean translucentNavigationBarOnFullscreen;
235
236     // `currentDomainName` is used in `onCreate()`, `onNavigationItemSelected()`, and `applyDomainSettings()`.
237     private String currentDomainName;
238
239     // `waitingForOrbot` is used in `onCreate()` and `applyAppSettings()`.
240     private boolean waitingForOrbot;
241
242     // `domainSettingsApplied` is used in `applyDomainSettings()` and `setDisplayWebpageImages()`.
243     private boolean domainSettingsApplied;
244
245     // `displayWebpageImagesInt` is used in `applyDomainSettings()` and `setDisplayWebpageImages()`.
246     private int displayWebpageImagesInt;
247
248     // `onTheFlyDisplayImagesSet` is used in `applyDomainSettings()` and `setDisplayWebpageImages()`.
249     private boolean onTheFlyDisplayImagesSet;
250
251     // `waitingForOrbotData` is used in `onCreate()` and `applyAppSettings()`.
252     private String waitingForOrbotHTMLString;
253
254     // `privateDataDirectoryString` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`.
255     private String privateDataDirectoryString;
256
257     // `findOnPageLinearLayout` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
258     private LinearLayout findOnPageLinearLayout;
259
260     // `findOnPageEditText` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
261     private EditText findOnPageEditText;
262
263     // `mainMenu` is used in `onCreateOptionsMenu()` and `updatePrivacyIcons()`.
264     private Menu mainMenu;
265
266     // `drawerToggle` is used in `onCreate()`, `onPostCreate()`, `onConfigurationChanged()`, `onNewIntent()`, and `onNavigationItemSelected()`.
267     private ActionBarDrawerToggle drawerToggle;
268
269     // `supportAppBar` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
270     private Toolbar supportAppBar;
271
272     // `urlTextBox` is used in `onCreate()`, `onOptionsItemSelected()`, `loadUrlFromTextBox()`, `loadUrl()`, and `highlightUrlText()`.
273     private EditText urlTextBox;
274
275     // `redColorSpan` is used in `onCreate()` and `highlightUrlText()`.
276     private ForegroundColorSpan redColorSpan;
277
278     // `initialGrayColorSpan` is sued in `onCreate()` and `highlightUrlText()`.
279     private ForegroundColorSpan initialGrayColorSpan;
280
281     // `finalGrayColorSpam` is used in `onCreate()` and `highlightUrlText()`.
282     private ForegroundColorSpan finalGrayColorSpan;
283
284     // `adView` is used in `onCreate()` and `onConfigurationChanged()`.
285     private View adView;
286
287     // `sslErrorHandler` is used in `onCreate()`, `onSslErrorCancel()`, and `onSslErrorProceed`.
288     private SslErrorHandler sslErrorHandler;
289
290     // `inputMethodManager` is used in `onOptionsItemSelected()`, `loadUrlFromTextBox()`, and `closeFindOnPage()`.
291     private InputMethodManager inputMethodManager;
292
293     // `mainWebViewRelativeLayout` is used in `onCreate()` and `onNavigationItemSelected()`.
294     private RelativeLayout mainWebViewRelativeLayout;
295
296     // `urlIsLoading` is used in `onCreate()`, `loadUrl()`, and `applyDomainSettings()`.
297     private boolean urlIsLoading;
298
299     @Override
300     // 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.
301     @SuppressLint("SetJavaScriptEnabled")
302     // Remove Android Studio's warning about deprecations.  We have to use the deprecated `getColor()` until API >= 23.
303     @SuppressWarnings("deprecation")
304     protected void onCreate(Bundle savedInstanceState) {
305         // Get a handle for `sharedPreferences`.  `this` references the current context.
306         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
307
308         // Get the theme preference.
309         darkTheme = sharedPreferences.getBoolean("dark_theme", false);
310
311         // Set the activity theme.
312         if (darkTheme) {
313             setTheme(R.style.PrivacyBrowserDark);
314         } else {
315             setTheme(R.style.PrivacyBrowserLight);
316         }
317
318         // Run the default commands.
319         super.onCreate(savedInstanceState);
320
321         // Set the content view.
322         setContentView(R.layout.main_drawerlayout);
323
324         // Get a handle for `inputMethodManager`.
325         inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
326
327         // We need to use the `SupportActionBar` from `android.support.v7.app.ActionBar` until the minimum API is >= 21.
328         supportAppBar = (Toolbar) findViewById(R.id.app_bar);
329         setSupportActionBar(supportAppBar);
330         appBar = getSupportActionBar();
331
332         // This is needed to get rid of the Android Studio warning that `appBar` might be null.
333         assert appBar != null;
334
335         // Add the custom `url_app_bar` layout, which shows the favorite icon and the URL text bar.
336         appBar.setCustomView(R.layout.url_app_bar);
337         appBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
338
339         // Initialize the `ForegroundColorSpans` and `StyleSpan` for highlighting `urlTextBox`.  We have to use the deprecated `getColor()` until API >= 23.
340         redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_a700));
341         initialGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
342         finalGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
343
344         // Get a handle for `urlTextBox`.
345         urlTextBox = (EditText) appBar.getCustomView().findViewById(R.id.url_edittext);
346
347         // Remove the formatting from `urlTextBar` when the user is editing the text.
348         urlTextBox.setOnFocusChangeListener(new View.OnFocusChangeListener() {
349             @Override
350             public void onFocusChange(View v, boolean hasFocus) {
351                 if (hasFocus) {  // The user is editing `urlTextBox`.
352                     // Remove the highlighting.
353                     urlTextBox.getText().removeSpan(redColorSpan);
354                     urlTextBox.getText().removeSpan(initialGrayColorSpan);
355                     urlTextBox.getText().removeSpan(finalGrayColorSpan);
356                 } else {  // The user has stopped editing `urlTextBox`.
357                     // Reapply the highlighting.
358                     highlightUrlText();
359                 }
360             }
361         });
362
363         // Set the `Go` button on the keyboard to load the URL in `urlTextBox`.
364         urlTextBox.setOnKeyListener(new View.OnKeyListener() {
365             @Override
366             public boolean onKey(View v, int keyCode, KeyEvent event) {
367                 // If the event is a key-down event on the `enter` button, load the URL.
368                 if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {
369                     // Load the URL into the mainWebView and consume the event.
370                     try {
371                         loadUrlFromTextBox();
372                     } catch (UnsupportedEncodingException e) {
373                         e.printStackTrace();
374                     }
375                     // If the enter key was pressed, consume the event.
376                     return true;
377                 } else {
378                     // If any other key was pressed, do not consume the event.
379                     return false;
380                 }
381             }
382         });
383
384         // Set `waitingForOrbotHTMLString`.
385         waitingForOrbotHTMLString = "<html><body><br/><center><h1>" + getString(R.string.waiting_for_orbot) + "</h1></center></body></html>";
386
387         // Initialize `currentDomainName`, `orbotStatus`, and `waitingForOrbot`.
388         currentDomainName = "";
389         orbotStatus = "unknown";
390         waitingForOrbot = false;
391
392         // Create an Orbot status `BroadcastReceiver`.
393         BroadcastReceiver orbotStatusBroadcastReceiver = new BroadcastReceiver() {
394             @Override
395             public void onReceive(Context context, Intent intent) {
396                 // Store the content of the status message in `orbotStatus`.
397                 orbotStatus = intent.getStringExtra("org.torproject.android.intent.extra.STATUS");
398
399                 // If we are waiting on Orbot, load the website now that Orbot is connected.
400                 if (orbotStatus.equals("ON") && waitingForOrbot) {
401                     // Reset `waitingForOrbot`.
402                     waitingForOrbot = false;
403
404                     // Load `formattedUrlString
405                     loadUrl(formattedUrlString);
406                 }
407             }
408         };
409
410         // Register `orbotStatusBroadcastReceiver` on `this` context.
411         this.registerReceiver(orbotStatusBroadcastReceiver, new IntentFilter("org.torproject.android.intent.action.STATUS"));
412
413         // Get handles for views that need to be accessed.
414         drawerLayout = (DrawerLayout) findViewById(R.id.drawerlayout);
415         rootCoordinatorLayout = (CoordinatorLayout) findViewById(R.id.root_coordinatorlayout);
416         mainWebViewRelativeLayout = (RelativeLayout) findViewById(R.id.main_webview_relativelayout);
417         mainWebView = (WebView) findViewById(R.id.main_webview);
418         findOnPageLinearLayout = (LinearLayout) findViewById(R.id.find_on_page_linearlayout);
419         findOnPageEditText = (EditText) findViewById(R.id.find_on_page_edittext);
420         fullScreenVideoFrameLayout = (FrameLayout) findViewById(R.id.full_screen_video_framelayout);
421         urlAppBarRelativeLayout = (RelativeLayout) findViewById(R.id.url_app_bar_relativelayout);
422         favoriteIconImageView = (ImageView) findViewById(R.id.favorite_icon);
423
424         // Create a double-tap listener to toggle full-screen mode.
425         final GestureDetector gestureDetector = new GestureDetector(this, new GestureDetector.SimpleOnGestureListener() {
426             // Override `onDoubleTap()`.  All other events are handled using the default settings.
427             @Override
428             public boolean onDoubleTap(MotionEvent event) {
429                 if (fullScreenBrowsingModeEnabled) {  // Only process the double-tap if full screen browsing mode is enabled.
430                     // Toggle `inFullScreenBrowsingMode`.
431                     inFullScreenBrowsingMode = !inFullScreenBrowsingMode;
432
433                     if (inFullScreenBrowsingMode) {  // Switch to full screen mode.
434                         // Hide the `appBar`.
435                         appBar.hide();
436
437                         // Hide the `BannerAd` in the free flavor.
438                         if (BuildConfig.FLAVOR.contentEquals("free")) {
439                             BannerAd.hideAd(adView);
440                         }
441
442                         // Modify the system bars.
443                         if (hideSystemBarsOnFullscreen) {  // Hide everything.
444                             // Remove the translucent overlays.
445                             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
446
447                             // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
448                             drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
449
450                             /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
451                              * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
452                              * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically rehides them after they are shown.
453                              */
454                             rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
455
456                             // Set `rootCoordinatorLayout` to fill the whole screen.
457                             rootCoordinatorLayout.setFitsSystemWindows(false);
458                         } else {  // Hide everything except the status and navigation bars.
459                             // Set `rootCoordinatorLayout` to fit under the status and navigation bars.
460                             rootCoordinatorLayout.setFitsSystemWindows(false);
461
462                             if (translucentNavigationBarOnFullscreen) {  // 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.
463                                 // Set the navigation bar to be translucent.
464                                 getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
465                             }
466                         }
467                     } else {  // Switch to normal viewing mode.
468                         // Show the `appBar`.
469                         appBar.show();
470
471                         // Show the `BannerAd` in the free flavor.
472                         if (BuildConfig.FLAVOR.contentEquals("free")) {
473                             // Reload the ad.  Because the screen may have rotated, we need to use `reloadAfterRotate`.
474                             BannerAd.reloadAfterRotate(adView, getApplicationContext(), getString(R.string.ad_id));
475
476                             // Reinitialize the `adView` variable, as the `View` will have been removed and re-added by `BannerAd.reloadAfterRotate()`.
477                             adView = findViewById(R.id.adview);
478                         }
479
480                         // Remove the translucent navigation bar flag if it is set.
481                         getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
482
483                         // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
484                         getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
485
486                         // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
487                         rootCoordinatorLayout.setSystemUiVisibility(0);
488
489                         // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
490                         rootCoordinatorLayout.setFitsSystemWindows(true);
491                     }
492
493                     // Consume the double-tap.
494                     return true;
495                 } else { // Do not consume the double-tap because full screen browsing mode is disabled.
496                     return false;
497                 }
498             }
499         });
500
501         // Pass all touch events on `mainWebView` through `gestureDetector` to check for double-taps.
502         mainWebView.setOnTouchListener(new View.OnTouchListener() {
503             @Override
504             public boolean onTouch(View v, MotionEvent event) {
505                 // Send the `event` to `gestureDetector`.
506                 return gestureDetector.onTouchEvent(event);
507             }
508         });
509
510         // Update `findOnPageCountTextView`.
511         mainWebView.setFindListener(new WebView.FindListener() {
512             // Get a handle for `findOnPageCountTextView`.
513             final TextView findOnPageCountTextView = (TextView) findViewById(R.id.find_on_page_count_textview);
514
515             @Override
516             public void onFindResultReceived(int activeMatchOrdinal, int numberOfMatches, boolean isDoneCounting) {
517                 if ((isDoneCounting) && (numberOfMatches == 0)) {  // There are no matches.
518                     // Set `findOnPageCountTextView` to `0/0`.
519                     findOnPageCountTextView.setText(R.string.zero_of_zero);
520                 } else if (isDoneCounting) {  // There are matches.
521                     // `activeMatchOrdinal` is zero-based.
522                     int activeMatch = activeMatchOrdinal + 1;
523
524                     // Set `findOnPageCountTextView`.
525                     findOnPageCountTextView.setText(activeMatch + "/" + numberOfMatches);
526                 }
527             }
528         });
529
530         // Search for the string on the page whenever a character changes in the `findOnPageEditText`.
531         findOnPageEditText.addTextChangedListener(new TextWatcher() {
532             @Override
533             public void beforeTextChanged(CharSequence s, int start, int count, int after) {
534                 // Do nothing.
535             }
536
537             @Override
538             public void onTextChanged(CharSequence s, int start, int before, int count) {
539                 // Do nothing.
540             }
541
542             @Override
543             public void afterTextChanged(Editable s) {
544                 // Search for the text in `mainWebView`.
545                 mainWebView.findAllAsync(findOnPageEditText.getText().toString());
546             }
547         });
548
549         // Set the `check mark` button for the `findOnPageEditText` keyboard to close the soft keyboard.
550         findOnPageEditText.setOnKeyListener(new View.OnKeyListener() {
551             @Override
552             public boolean onKey(View v, int keyCode, KeyEvent event) {
553                 if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {  // The `enter` key was pressed.
554                     // Hide the soft keyboard.  `0` indicates no additional flags.
555                     inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
556
557                     // Consume the event.
558                     return true;
559                 } else {  // A different key was pressed.
560                     // Do not consume the event.
561                     return false;
562                 }
563             }
564         });
565
566         // Implement swipe to refresh
567         swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_refreshlayout);
568         swipeRefreshLayout.setColorSchemeResources(R.color.blue_700);
569         swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
570             @Override
571             public void onRefresh() {
572                 mainWebView.reload();
573             }
574         });
575
576         // `DrawerTitle` identifies the `DrawerLayout` in accessibility mode.
577         drawerLayout.setDrawerTitle(GravityCompat.START, getString(R.string.navigation_drawer));
578
579         // Listen for touches on the navigation menu.
580         final NavigationView navigationView = (NavigationView) findViewById(R.id.navigationview);
581         navigationView.setNavigationItemSelectedListener(this);
582
583         // 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.
584         final Menu navigationMenu = navigationView.getMenu();
585         final MenuItem navigationBackMenuItem = navigationMenu.getItem(1);
586         final MenuItem navigationForwardMenuItem = navigationMenu.getItem(2);
587         final MenuItem navigationHistoryMenuItem = navigationMenu.getItem(3);
588
589         // The `DrawerListener` allows us to update the Navigation Menu.
590         drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
591             @Override
592             public void onDrawerSlide(View drawerView, float slideOffset) {
593             }
594
595             @Override
596             public void onDrawerOpened(View drawerView) {
597             }
598
599             @Override
600             public void onDrawerClosed(View drawerView) {
601             }
602
603             @Override
604             public void onDrawerStateChanged(int newState) {
605                 if ((newState == DrawerLayout.STATE_SETTLING) || (newState == DrawerLayout.STATE_DRAGGING)) {  // The drawer is opening or closing.
606                     // Update the `Back`, `Forward`, and `History` menu items.
607                     navigationBackMenuItem.setEnabled(mainWebView.canGoBack());
608                     navigationForwardMenuItem.setEnabled(mainWebView.canGoForward());
609                     navigationHistoryMenuItem.setEnabled((mainWebView.canGoBack() || mainWebView.canGoForward()));
610
611                     // Hide the keyboard (if displayed) so we can see the navigation menu.  `0` indicates no additional flags.
612                     inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
613
614                     // Clear the focus from `urlTextBox` if it has it.
615                     urlTextBox.clearFocus();
616                 }
617             }
618         });
619
620         // drawerToggle creates the hamburger icon at the start of the AppBar.
621         drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, supportAppBar, R.string.open_navigation_drawer, R.string.close_navigation_drawer);
622
623         // Initialize `adServerSet`.
624         final Set<String> adServersSet = new HashSet<>();
625
626         // Load the list of ad servers into memory.
627         try {
628             // Load `pgl.yoyo.org_adservers.txt` into a `BufferedReader`.
629             BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(getAssets().open("pgl.yoyo.org_adservers.txt")));
630
631             // Create a string for storing each ad server.
632             String adServer;
633
634             // Populate `adServersSet`.
635             while ((adServer = bufferedReader.readLine()) != null) {
636                 adServersSet.add(adServer);
637             }
638
639             // Close `bufferedReader`.
640             bufferedReader.close();
641         } catch (IOException ioException) {
642             // We're pretty sure the asset exists, so we don't need to worry about the `IOException` ever being thrown.
643         }
644
645         mainWebView.setWebViewClient(new WebViewClient() {
646             // `shouldOverrideUrlLoading` makes this `WebView` the default handler for URLs inside the app, so that links are not kicked out to other apps.
647             // We have to use the deprecated `shouldOverrideUrlLoading` until API >= 24.
648             @SuppressWarnings("deprecation")
649             @Override
650             public boolean shouldOverrideUrlLoading(WebView view, String url) {
651                 if (url.startsWith("mailto:")) {  // Load the URL in an external email program because it begins with `mailto:`.
652                     // We use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
653                     Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
654
655                     // Parse the url and set it as the data for the `Intent`.
656                     emailIntent.setData(Uri.parse(url));
657
658                     // `FLAG_ACTIVITY_NEW_TASK` opens the email program in a new task instead as part of Privacy Browser.
659                     emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
660
661                     // Make it so.
662                     startActivity(emailIntent);
663
664                     // Returning `true` indicates the application is handling the URL.
665                     return true;
666                 } else {  // Load the URL in Privacy Browser.
667                     // Apply the domain settings for the new URL.
668                     applyDomainSettings(url);
669
670                     // Returning `false` causes the current `WebView` to handle the URL and prevents it from adding redirects to the history list.
671                     return false;
672                 }
673             }
674
675             // Block ads.  We have to use the deprecated `shouldInterceptRequest` until minimum API >= 21.
676             @SuppressWarnings("deprecation")
677             @Override
678             public WebResourceResponse shouldInterceptRequest(WebView view, String url){
679                 if (adBlockerEnabled) {  // Block ads.
680                     // Extract the host from `url`.
681                     Uri requestUri = Uri.parse(url);
682                     String requestHost = requestUri.getHost();
683
684                     // Initialize a variable to track if this is an ad server.
685                     boolean requestHostIsAdServer = false;
686
687                     // Check all the subdomains of `requestHost` if it is not `null` against the ad server database.
688                     if (requestHost != null) {
689                         while (requestHost.contains(".") && !requestHostIsAdServer) {  // Stop checking if we run out of `.` or if we already know that `requestHostIsAdServer` is `true`.
690                             if (adServersSet.contains(requestHost)) {
691                                 requestHostIsAdServer = true;
692                             }
693
694                             // Strip out the lowest subdomain of `requestHost`.
695                             requestHost = requestHost.substring(requestHost.indexOf(".") + 1);
696                         }
697                     }
698
699                     if (requestHostIsAdServer) {  // It is an ad server.
700                         // Return an empty `WebResourceResponse`.
701                         return new WebResourceResponse("text/plain", "utf8", new ByteArrayInputStream("".getBytes()));
702                     } else {  // It is not an ad server.
703                         // `return null` loads the requested resource.
704                         return null;
705                     }
706                 } else {  // Ad blocking is disabled.
707                     // `return null` loads the requested resource.
708                     return null;
709                 }
710             }
711
712             // Update the URL in urlTextBox when the page starts to load.
713             @Override
714             public void onPageStarted(WebView view, String url, Bitmap favicon) {
715                 // Check to see if we are waiting on Orbot.
716                 if (!waitingForOrbot) {  // We are not waiting on Orbot, so we need to process the URL.
717                     // 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.
718                     formattedUrlString = url;
719
720                     // Display the formatted URL text.
721                     urlTextBox.setText(formattedUrlString);
722
723                     // Apply text highlighting to `urlTextBox`.
724                     highlightUrlText();
725
726                     // Apply any custom domain settings if the URL was loaded by navigating history.
727                     if (navigatingHistory) {
728                         applyDomainSettings(url);
729                     }
730
731                     // 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.
732                     urlIsLoading = true;
733                 }
734             }
735
736             // Update formattedUrlString and urlTextBox.  It is necessary to do this after the page finishes loading because the final URL can change during load.
737             @Override
738             public void onPageFinished(WebView view, String url) {
739                 // Reset `urlIsLoading`, which is used to prevent reloads on redirect if the user agent changes.
740                 urlIsLoading = false;
741
742                 // Clear the cache and history if Incognito Mode is enabled.
743                 if (incognitoModeEnabled) {
744                     // Clear the cache.  `true` includes disk files.
745                     mainWebView.clearCache(true);
746
747                     // Clear the back/forward history.
748                     mainWebView.clearHistory();
749
750                     // Manually delete cache folders.
751                     try {
752                         // Delete the main `cache` folder.
753                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
754
755                         // 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`.
756                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview");
757                     } catch (IOException e) {
758                         // Do nothing if an error is thrown.
759                     }
760                 }
761
762                 // Update `urlTextBox` and apply domain settings if not waiting on Orbot.
763                 if (!waitingForOrbot) {
764                     // Check to see if `WebView` has set `url` to be `about:blank`.
765                     if (url.equals("about:blank")) {  // `WebView` is blank, so `formattedUrlString` should be `""` and `urlTextBox` should display a hint.
766                         // Set `formattedUrlString` to `""`.
767                         formattedUrlString = "";
768
769                         urlTextBox.setText(formattedUrlString);
770
771                         // Request focus for `urlTextBox`.
772                         urlTextBox.requestFocus();
773
774                         // Display the keyboard.
775                         inputMethodManager.showSoftInput(urlTextBox, 0);
776
777                         // Apply the domain settings.  This clears any settings from the previous domain.
778                         applyDomainSettings(formattedUrlString);
779                     } else {  // `WebView` has loaded a webpage.
780                         // Set `formattedUrlString`.
781                         formattedUrlString = url;
782
783                         // Only update `urlTextBox` if the user is not typing in it.
784                         if (!urlTextBox.hasFocus()) {
785                             // Display the formatted URL text.
786                             urlTextBox.setText(formattedUrlString);
787
788                             // Apply text highlighting to `urlTextBox`.
789                             highlightUrlText();
790                         }
791                     }
792
793                     // Store the SSL certificate so it can be accessed from `ViewSslCertificateDialog`.
794                     sslCertificate = mainWebView.getCertificate();
795                 }
796             }
797
798             // Handle SSL Certificate errors.
799             @Override
800             public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
801                 // Store `handler` so it can be accesses from `onSslErrorCancel()` and `onSslErrorProceed()`.
802                 sslErrorHandler = handler;
803
804                 // Display the SSL error `AlertDialog`.
805                 AppCompatDialogFragment sslCertificateErrorDialogFragment = SslCertificateErrorDialog.displayDialog(error);
806                 sslCertificateErrorDialogFragment.show(getSupportFragmentManager(), getResources().getString(R.string.ssl_certificate_error));
807             }
808         });
809
810         // Get a handle for the progress bar.
811         final ProgressBar progressBar = (ProgressBar) findViewById(R.id.progress_bar);
812
813         mainWebView.setWebChromeClient(new WebChromeClient() {
814             // Update the progress bar when a page is loading.
815             @Override
816             public void onProgressChanged(WebView view, int progress) {
817                 progressBar.setProgress(progress);
818                 if (progress < 100) {
819                     progressBar.setVisibility(View.VISIBLE);
820                 } else {
821                     progressBar.setVisibility(View.GONE);
822
823                     //Stop the `SwipeToRefresh` indicator if it is running
824                     swipeRefreshLayout.setRefreshing(false);
825                 }
826             }
827
828             // Set the favorite icon when it changes.
829             @Override
830             public void onReceivedIcon(WebView view, Bitmap icon) {
831                 // Only update the favorite icon if the website has finished loading.
832                 if (progressBar.getVisibility() == View.GONE) {
833                     // Save a copy of the favorite icon.
834                     favoriteIconBitmap = icon;
835
836                     // Place the favorite icon in the appBar.
837                     favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
838                 }
839             }
840
841             // Save a copy of the title when it changes.
842             @Override
843             public void onReceivedTitle(WebView view, String title) {
844                 // Save a copy of the title.
845                 webViewTitle = title;
846             }
847
848             // Enter full screen video
849             @Override
850             public void onShowCustomView(View view, CustomViewCallback callback) {
851                 // Pause the ad if this is the free flavor.
852                 if (BuildConfig.FLAVOR.contentEquals("free")) {
853                     BannerAd.pauseAd(adView);
854                 }
855
856                 // Remove the translucent overlays.
857                 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
858
859                 // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
860                 drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
861
862                 /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
863                  * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
864                  * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically rehides them after they are shown.
865                  */
866                 rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
867
868                 // Set `rootCoordinatorLayout` to fill the entire screen.
869                 rootCoordinatorLayout.setFitsSystemWindows(false);
870
871                 // Add `view` to `fullScreenVideoFrameLayout` and display it on the screen.
872                 fullScreenVideoFrameLayout.addView(view);
873                 fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
874             }
875
876             // Exit full screen video
877             public void onHideCustomView() {
878                 // Hide `fullScreenVideoFrameLayout`.
879                 fullScreenVideoFrameLayout.removeAllViews();
880                 fullScreenVideoFrameLayout.setVisibility(View.GONE);
881
882                 // Add the translucent status flag.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
883                 getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
884
885                 // Set `rootCoordinatorLayout` to fit inside the status and navigation bars.  This also clears the `SYSTEM_UI` flags.
886                 rootCoordinatorLayout.setFitsSystemWindows(true);
887
888                 // Show the ad if this is the free flavor.
889                 if (BuildConfig.FLAVOR.contentEquals("free")) {
890                     // Reload the ad.  Because the screen may have rotated, we need to use `reloadAfterRotate`.
891                     BannerAd.reloadAfterRotate(adView, getApplicationContext(), getString(R.string.ad_id));
892
893                     // Reinitialize the `adView` variable, as the `View` will have been removed and re-added by `BannerAd.reloadAfterRotate()`.
894                     adView = findViewById(R.id.adview);
895                 }
896             }
897         });
898
899         // Register `mainWebView` for a context menu.  This is used to see link targets and download images.
900         registerForContextMenu(mainWebView);
901
902         // Allow the downloading of files.
903         mainWebView.setDownloadListener(new DownloadListener() {
904             @Override
905             public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
906                 // Show the `DownloadFileDialog` `AlertDialog` and name this instance `@string/download`.
907                 AppCompatDialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(url, contentDisposition, contentLength);
908                 downloadFileDialogFragment.show(getSupportFragmentManager(), getResources().getString(R.string.download));
909             }
910         });
911
912         // Allow pinch to zoom.
913         mainWebView.getSettings().setBuiltInZoomControls(true);
914
915         // Hide zoom controls.
916         mainWebView.getSettings().setDisplayZoomControls(false);
917
918         // Set `mainWebView` to use a wide viewport.  Otherwise, some web pages will be scrunched and some content will render outside the screen.
919         mainWebView.getSettings().setUseWideViewPort(true);
920
921         // Set `mainWebView` to load in overview mode (zoomed out to the maximum width).
922         mainWebView.getSettings().setLoadWithOverviewMode(true);
923
924         // Initialize cookieManager.
925         cookieManager = CookieManager.getInstance();
926
927         // 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).
928         customHeaders.put("X-Requested-With", "");
929
930         // 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.
931         PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
932
933         // Get the intent that started the app.
934         final Intent launchingIntent = getIntent();
935
936         // Extract the launching intent data as `launchingIntentUriData`.
937         final Uri launchingIntentUriData = launchingIntent.getData();
938
939         // Convert the launching intent URI data (if it exists) to a string and store it in `formattedUrlString`.
940         if (launchingIntentUriData != null) {
941             formattedUrlString = launchingIntentUriData.toString();
942         }
943
944         // Get a handle for the `Runtime`.
945         privacyBrowserRuntime = Runtime.getRuntime();
946
947         // Store the application's private data directory.
948         privateDataDirectoryString = getApplicationInfo().dataDir;  // `dataDir` will vary, but will be something like `/data/user/0/com.stoutner.privacybrowser.standard`, which links to `/data/data/com.stoutner.privacybrowser.standard`.
949
950         // Initialize `inFullScreenBrowsingMode`, which is always false at this point because Privacy Browser never starts in full screen browsing mode.
951         inFullScreenBrowsingMode = false;
952
953         // Initialize AdView for the free flavor.
954         adView = findViewById(R.id.adview);
955
956         // Initialize the privacy settings variables.
957         javaScriptEnabled = false;
958         firstPartyCookiesEnabled = false;
959         thirdPartyCookiesEnabled = false;
960         domStorageEnabled = false;
961         saveFormDataEnabled = false;
962
963         // Initialize `webViewTitle`.
964         webViewTitle = getString(R.string.no_title);
965
966         // Initialize `favoriteIconBitmap`.  We have to use `ContextCompat` until API >= 21.
967         Drawable favoriteIconDrawable = ContextCompat.getDrawable(getApplicationContext(), R.drawable.world);
968         BitmapDrawable favoriteIconBitmapDrawable = (BitmapDrawable) favoriteIconDrawable;
969         favoriteIconDefaultBitmap = favoriteIconBitmapDrawable.getBitmap();
970
971         // If the favorite icon is null, load the default.
972         if (favoriteIconBitmap == null) {
973             favoriteIconBitmap = favoriteIconDefaultBitmap;
974         }
975
976         // Apply the app settings from the shared preferences.
977         applyAppSettings();
978
979         // Load `formattedUrlString` if we are not waiting for Orbot to connect.
980         if (!waitingForOrbot) {
981             loadUrl(formattedUrlString);
982         }
983     }
984
985     @Override
986     protected void onNewIntent(Intent intent) {
987         // Sets the new intent as the activity intent, so that any future `getIntent()`s pick up this one instead of creating a new activity.
988         setIntent(intent);
989
990         if (intent.getData() != null) {
991             // Get the intent data and convert it to a string.
992             final Uri intentUriData = intent.getData();
993             formattedUrlString = intentUriData.toString();
994         }
995
996         // Close the navigation drawer if it is open.
997         if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
998             drawerLayout.closeDrawer(GravityCompat.START);
999         }
1000
1001         // Load the website.
1002         loadUrl(formattedUrlString);
1003
1004         // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
1005         mainWebView.requestFocus();
1006     }
1007
1008     @Override
1009     public void onRestart() {
1010         super.onRestart();
1011
1012         // Apply the app settings, which may have been changed in `SettingsActivity`.
1013         applyAppSettings();
1014
1015         // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1016         updatePrivacyIcons(true);
1017
1018         // Set the display webpage images mode.
1019         setDisplayWebpageImages();
1020
1021         // Reload the webpage if displaying of images has been disabled in `SettingsFragment`.
1022         if (reloadOnRestartBoolean) {
1023             // Reload `mainWebView`.
1024             mainWebView.reload();
1025
1026             // Reset `reloadOnRestartBoolean`.
1027             reloadOnRestartBoolean = false;
1028         }
1029     }
1030
1031     // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
1032     @Override
1033     public void onResume() {
1034         super.onResume();
1035
1036         // Resume JavaScript (if enabled).
1037         mainWebView.resumeTimers();
1038
1039         // Resume `mainWebView`.
1040         mainWebView.onResume();
1041
1042         // Resume the adView for the free flavor.
1043         if (BuildConfig.FLAVOR.contentEquals("free")) {
1044             BannerAd.resumeAd(adView);
1045         }
1046     }
1047
1048     @Override
1049     public void onPause() {
1050         // Pause `mainWebView`.
1051         mainWebView.onPause();
1052
1053         // Stop all JavaScript.
1054         mainWebView.pauseTimers();
1055
1056         // Pause the adView or it will continue to consume resources in the background on the free flavor.
1057         if (BuildConfig.FLAVOR.contentEquals("free")) {
1058             BannerAd.pauseAd(adView);
1059         }
1060
1061         super.onPause();
1062     }
1063
1064     @Override
1065     public boolean onCreateOptionsMenu(Menu menu) {
1066         // Inflate the menu; this adds items to the action bar if it is present.
1067         getMenuInflater().inflate(R.menu.webview_options_menu, menu);
1068
1069         // Set mainMenu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons`.
1070         mainMenu = menu;
1071
1072         // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
1073         updatePrivacyIcons(false);
1074
1075         // Get handles for the menu items.
1076         MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
1077         MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
1078         MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
1079         MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);
1080
1081         // Only display third-party cookies if SDK >= 21
1082         toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
1083
1084         // Get the shared preference values.  `this` references the current context.
1085         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
1086
1087         // Set the status of the additional app bar icons.  The default is `false`.
1088         if (sharedPreferences.getBoolean("display_additional_app_bar_icons", false)) {
1089             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
1090             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
1091             toggleSaveFormDataMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
1092         } else { //Do not display the additional icons.
1093             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
1094             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
1095             toggleSaveFormDataMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
1096         }
1097
1098         return true;
1099     }
1100
1101     @Override
1102     public boolean onPrepareOptionsMenu(Menu menu) {
1103         // Get handles for the menu items.
1104         MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
1105         MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
1106         MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
1107         MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);
1108         MenuItem clearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
1109         MenuItem clearDOMStorageMenuItem = menu.findItem(R.id.clear_dom_storage);
1110         MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);
1111         MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
1112         MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
1113         MenuItem refreshMenuItem = menu.findItem(R.id.refresh);
1114
1115         // Set the status of the menu item checkboxes.
1116         toggleFirstPartyCookiesMenuItem.setChecked(firstPartyCookiesEnabled);
1117         toggleThirdPartyCookiesMenuItem.setChecked(thirdPartyCookiesEnabled);
1118         toggleDomStorageMenuItem.setChecked(domStorageEnabled);
1119         toggleSaveFormDataMenuItem.setChecked(saveFormDataEnabled);
1120         displayImagesMenuItem.setChecked(mainWebView.getSettings().getLoadsImagesAutomatically());
1121
1122         // Enable third-party cookies if first-party cookies are enabled.
1123         toggleThirdPartyCookiesMenuItem.setEnabled(firstPartyCookiesEnabled);
1124
1125         // Enable `DOM Storage` if JavaScript is enabled.
1126         toggleDomStorageMenuItem.setEnabled(javaScriptEnabled);
1127
1128         // Enable `Clear Cookies` if there are any.
1129         clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
1130
1131         // Get a count of the number of files in the `Local Storage` directory.
1132         File localStorageDirectory = new File (privateDataDirectoryString + "/app_webview/Local Storage/");
1133         int localStorageDirectoryNumberOfFiles = 0;
1134         if (localStorageDirectory.exists()) {
1135             localStorageDirectoryNumberOfFiles = localStorageDirectory.list().length;
1136         }
1137
1138         // Get a count of the number of files in the `IndexedDB` directory.
1139         File indexedDBDirectory = new File (privateDataDirectoryString + "/app_webview/IndexedDB");
1140         int indexedDBDirectoryNumberOfFiles = 0;
1141         if (indexedDBDirectory.exists()) {
1142             indexedDBDirectoryNumberOfFiles = indexedDBDirectory.list().length;
1143         }
1144
1145         // Enable `Clear DOM Storage` if there is any.
1146         clearDOMStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
1147
1148         // Enable `Clear Form Data` is there is any.
1149         WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(this);
1150         clearFormDataMenuItem.setEnabled(mainWebViewDatabase.hasFormData());
1151
1152         // Initialize font size variables.
1153         int fontSize = mainWebView.getSettings().getTextZoom();
1154         String fontSizeTitle;
1155         MenuItem selectedFontSizeMenuItem;
1156
1157         // Prepare the font size title and current size menu item.
1158         switch (fontSize) {
1159             case 25:
1160                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.twenty_five_percent);
1161                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_twenty_five_percent);
1162                 break;
1163
1164             case 50:
1165                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.fifty_percent);
1166                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
1167                 break;
1168
1169             case 75:
1170                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.seventy_five_percent);
1171                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_seventy_five_percent);
1172                 break;
1173
1174             case 100:
1175                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.one_hundred_percent);
1176                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
1177                 break;
1178
1179             case 125:
1180                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.one_hundred_twenty_five_percent);
1181                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_twenty_five_percent);
1182                 break;
1183
1184             case 150:
1185                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.one_hundred_fifty_percent);
1186                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_fifty_percent);
1187                 break;
1188
1189             case 175:
1190                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.one_hundred_seventy_five_percent);
1191                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_seventy_five_percent);
1192                 break;
1193
1194             case 200:
1195                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.two_hundred_percent);
1196                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_two_hundred_percent);
1197                 break;
1198
1199             default:
1200                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.one_hundred_percent);
1201                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
1202                 break;
1203         }
1204
1205         // Set the font size title and select the current size menu item.
1206         fontSizeMenuItem.setTitle(fontSizeTitle);
1207         selectedFontSizeMenuItem.setChecked(true);
1208
1209         // Only show `Refresh` if `swipeToRefresh` is disabled.
1210         refreshMenuItem.setVisible(!swipeToRefreshEnabled);
1211
1212         // Run all the other default commands.
1213         super.onPrepareOptionsMenu(menu);
1214
1215         // `return true` displays the menu.
1216         return true;
1217     }
1218
1219     @Override
1220     // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
1221     @SuppressLint("SetJavaScriptEnabled")
1222     // removeAllCookies is deprecated, but it is required for API < 21.
1223     @SuppressWarnings("deprecation")
1224     public boolean onOptionsItemSelected(MenuItem menuItem) {
1225         int menuItemId = menuItem.getItemId();
1226
1227         // Set the commands that relate to the menu entries.
1228         switch (menuItemId) {
1229             case R.id.toggle_javascript:
1230                 // Switch the status of javaScriptEnabled.
1231                 javaScriptEnabled = !javaScriptEnabled;
1232
1233                 // Apply the new JavaScript status.
1234                 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
1235
1236                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1237                 updatePrivacyIcons(true);
1238
1239                 // Display a `Snackbar`.
1240                 if (javaScriptEnabled) {  // JavaScrip is enabled.
1241                     Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
1242                 } else if (firstPartyCookiesEnabled) {  // JavaScript is disabled, but first-party cookies are enabled.
1243                     Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
1244                 } else {  // Privacy mode.
1245                     Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
1246                 }
1247
1248                 // Reload the WebView.
1249                 mainWebView.reload();
1250                 return true;
1251
1252             case R.id.toggle_first_party_cookies:
1253                 // Switch the status of firstPartyCookiesEnabled.
1254                 firstPartyCookiesEnabled = !firstPartyCookiesEnabled;
1255
1256                 // Update the menu checkbox.
1257                 menuItem.setChecked(firstPartyCookiesEnabled);
1258
1259                 // Apply the new cookie status.
1260                 cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
1261
1262                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1263                 updatePrivacyIcons(true);
1264
1265                 // Display a `Snackbar`.
1266                 if (firstPartyCookiesEnabled) {  // First-party cookies are enabled.
1267                     Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
1268                 } else if (javaScriptEnabled){  // JavaScript is still enabled.
1269                     Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
1270                 } else {  // Privacy mode.
1271                     Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
1272                 }
1273
1274                 // Reload the WebView.
1275                 mainWebView.reload();
1276                 return true;
1277
1278             case R.id.toggle_third_party_cookies:
1279                 if (Build.VERSION.SDK_INT >= 21) {
1280                     // Switch the status of thirdPartyCookiesEnabled.
1281                     thirdPartyCookiesEnabled = !thirdPartyCookiesEnabled;
1282
1283                     // Update the menu checkbox.
1284                     menuItem.setChecked(thirdPartyCookiesEnabled);
1285
1286                     // Apply the new cookie status.
1287                     cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
1288
1289                     // Display a `Snackbar`.
1290                     if (thirdPartyCookiesEnabled) {
1291                         Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
1292                     } else {
1293                         Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
1294                     }
1295
1296                     // Reload the WebView.
1297                     mainWebView.reload();
1298                 } // Else do nothing because SDK < 21.
1299                 return true;
1300
1301             case R.id.toggle_dom_storage:
1302                 // Switch the status of domStorageEnabled.
1303                 domStorageEnabled = !domStorageEnabled;
1304
1305                 // Update the menu checkbox.
1306                 menuItem.setChecked(domStorageEnabled);
1307
1308                 // Apply the new DOM Storage status.
1309                 mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
1310
1311                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1312                 updatePrivacyIcons(true);
1313
1314                 // Display a `Snackbar`.
1315                 if (domStorageEnabled) {
1316                     Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
1317                 } else {
1318                     Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
1319                 }
1320
1321                 // Reload the WebView.
1322                 mainWebView.reload();
1323                 return true;
1324
1325             case R.id.toggle_save_form_data:
1326                 // Switch the status of saveFormDataEnabled.
1327                 saveFormDataEnabled = !saveFormDataEnabled;
1328
1329                 // Update the menu checkbox.
1330                 menuItem.setChecked(saveFormDataEnabled);
1331
1332                 // Apply the new form data status.
1333                 mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
1334
1335                 // Display a `Snackbar`.
1336                 if (saveFormDataEnabled) {
1337                     Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
1338                 } else {
1339                     Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
1340                 }
1341
1342                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1343                 updatePrivacyIcons(true);
1344
1345                 // Reload the WebView.
1346                 mainWebView.reload();
1347                 return true;
1348
1349             case R.id.clear_cookies:
1350                 Snackbar.make(findViewById(R.id.main_webview), R.string.cookies_deleted, Snackbar.LENGTH_LONG)
1351                         .setAction(R.string.undo, new View.OnClickListener() {
1352                             @Override
1353                             public void onClick(View v) {
1354                                 // Do nothing because everything will be handled by `onDismissed()` below.
1355                             }
1356                         })
1357                         .addCallback(new Snackbar.Callback() {
1358                             @Override
1359                             public void onDismissed(Snackbar snackbar, int event) {
1360                                 switch (event) {
1361                                     // The user pushed the `Undo` button.
1362                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
1363                                         // Do nothing.
1364                                         break;
1365
1366                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
1367                                     default:
1368                                         // `cookieManager.removeAllCookie()` varies by SDK.
1369                                         if (Build.VERSION.SDK_INT < 21) {
1370                                             cookieManager.removeAllCookie();
1371                                         } else {
1372                                             // `null` indicates no callback.
1373                                             cookieManager.removeAllCookies(null);
1374                                         }
1375                                 }
1376                             }
1377                         })
1378                         .show();
1379                 return true;
1380
1381             case R.id.clear_dom_storage:
1382                 Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
1383                         .setAction(R.string.undo, new View.OnClickListener() {
1384                             @Override
1385                             public void onClick(View v) {
1386                                 // Do nothing because everything will be handled by `onDismissed()` below.
1387                             }
1388                         })
1389                         .addCallback(new Snackbar.Callback() {
1390                             @Override
1391                             public void onDismissed(Snackbar snackbar, int event) {
1392                                 switch (event) {
1393                                     // The user pushed the `Undo` button.
1394                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
1395                                         // Do nothing.
1396                                         break;
1397
1398                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
1399                                     default:
1400                                         // Delete the DOM Storage.
1401                                         WebStorage webStorage = WebStorage.getInstance();
1402                                         webStorage.deleteAllData();
1403
1404                                         // Manually remove `IndexedDB` if it exists.
1405                                         try {
1406                                             privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
1407                                         } catch (IOException e) {
1408                                             // Do nothing if an error is thrown.
1409                                         }
1410                                 }
1411                             }
1412                         })
1413                         .show();
1414                 return true;
1415
1416             case R.id.clear_form_data:
1417                 Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_deleted, Snackbar.LENGTH_LONG)
1418                         .setAction(R.string.undo, new View.OnClickListener() {
1419                             @Override
1420                             public void onClick(View v) {
1421                                 // Do nothing because everything will be handled by `onDismissed()` below.
1422                             }
1423                         })
1424                         .addCallback(new Snackbar.Callback() {
1425                             @Override
1426                             public void onDismissed(Snackbar snackbar, int event) {
1427                                 switch (event) {
1428                                     // The user pushed the `Undo` button.
1429                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
1430                                         // Do nothing.
1431                                         break;
1432
1433                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
1434                                     default:
1435                                         // Delete the form data.
1436                                         WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
1437                                         mainWebViewDatabase.clearFormData();
1438                                 }
1439                             }
1440                         })
1441                         .show();
1442                 return true;
1443
1444             case R.id.font_size_twenty_five_percent:
1445                 mainWebView.getSettings().setTextZoom(25);
1446                 return true;
1447
1448             case R.id.font_size_fifty_percent:
1449                 mainWebView.getSettings().setTextZoom(50);
1450                 return true;
1451
1452             case R.id.font_size_seventy_five_percent:
1453                 mainWebView.getSettings().setTextZoom(75);
1454                 return true;
1455
1456             case R.id.font_size_one_hundred_percent:
1457                 mainWebView.getSettings().setTextZoom(100);
1458                 return true;
1459
1460             case R.id.font_size_one_hundred_twenty_five_percent:
1461                 mainWebView.getSettings().setTextZoom(125);
1462                 return true;
1463
1464             case R.id.font_size_one_hundred_fifty_percent:
1465                 mainWebView.getSettings().setTextZoom(150);
1466                 return true;
1467
1468             case R.id.font_size_one_hundred_seventy_five_percent:
1469                 mainWebView.getSettings().setTextZoom(175);
1470                 return true;
1471
1472             case R.id.font_size_two_hundred_percent:
1473                 mainWebView.getSettings().setTextZoom(200);
1474                 return true;
1475
1476             case R.id.display_images:
1477                 if (mainWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
1478                     mainWebView.getSettings().setLoadsImagesAutomatically(false);
1479                     mainWebView.reload();
1480                 } else {  // Images are not currently loaded automatically.
1481                     mainWebView.getSettings().setLoadsImagesAutomatically(true);
1482                 }
1483
1484                 // Set `onTheFlyDisplayImagesSet`.
1485                 onTheFlyDisplayImagesSet = true;
1486                 return true;
1487
1488             case R.id.share:
1489                 // Setup the share string.
1490                 String shareString = webViewTitle + " – " + urlTextBox.getText().toString();
1491
1492                 // Create the share intent.
1493                 Intent shareIntent = new Intent();
1494                 shareIntent.setAction(Intent.ACTION_SEND);
1495                 shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
1496                 shareIntent.setType("text/plain");
1497
1498                 // Make it so.
1499                 startActivity(Intent.createChooser(shareIntent, "Share URL"));
1500                 return true;
1501
1502             case R.id.find_on_page:
1503                 // Hide the URL app bar.
1504                 supportAppBar.setVisibility(View.GONE);
1505
1506                 // Show the Find on Page `RelativeLayout`.
1507                 findOnPageLinearLayout.setVisibility(View.VISIBLE);
1508
1509                 // Display the keyboard.  We have to wait 200 ms before running the command to work around a bug in Android.  http://stackoverflow.com/questions/5520085/android-show-softkeyboard-with-showsoftinput-is-not-working
1510                 findOnPageEditText.postDelayed(new Runnable()
1511                 {
1512                     @Override
1513                     public void run()
1514                     {
1515                         // Set the focus on `findOnPageEditText`.
1516                         findOnPageEditText.requestFocus();
1517
1518                         // Display the keyboard.  `0` sets no input flags.
1519                         inputMethodManager.showSoftInput(findOnPageEditText, 0);
1520                     }
1521                 }, 200);
1522                 return true;
1523
1524             case R.id.print:
1525                 // Get a `PrintManager` instance.
1526                 PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
1527
1528                 // Convert `mainWebView` to `printDocumentAdapter`.
1529                 PrintDocumentAdapter printDocumentAdapter = mainWebView.createPrintDocumentAdapter();
1530
1531                 // Print the document.  The print attributes are `null`.
1532                 printManager.print(getResources().getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
1533                 return true;
1534
1535             case R.id.add_to_homescreen:
1536                 // Show the `CreateHomeScreenShortcutDialog` `AlertDialog` and name this instance `R.string.create_shortcut`.
1537                 AppCompatDialogFragment createHomeScreenShortcutDialogFragment = new CreateHomeScreenShortcutDialog();
1538                 createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getResources().getString(R.string.create_shortcut));
1539
1540                 //Everything else will be handled by `CreateHomeScreenShortcutDialog` and the associated listener below.
1541                 return true;
1542
1543             case R.id.refresh:
1544                 mainWebView.reload();
1545                 return true;
1546
1547             default:
1548                 // Don't consume the event.
1549                 return super.onOptionsItemSelected(menuItem);
1550         }
1551     }
1552
1553     // removeAllCookies is deprecated, but it is required for API < 21.
1554     @SuppressWarnings("deprecation")
1555     @Override
1556     public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
1557         int menuItemId = menuItem.getItemId();
1558
1559         switch (menuItemId) {
1560             case R.id.home:
1561                 loadUrl(homepage);
1562                 break;
1563
1564             case R.id.back:
1565                 if (mainWebView.canGoBack()) {
1566                     // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
1567                     navigatingHistory = true;
1568
1569                     // Load the previous website in the history.
1570                     mainWebView.goBack();
1571                 }
1572                 break;
1573
1574             case R.id.forward:
1575                 if (mainWebView.canGoForward()) {
1576                     // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
1577                     navigatingHistory = true;
1578
1579                     // Load the next website in the history.
1580                     mainWebView.goForward();
1581                 }
1582                 break;
1583
1584             case R.id.history:
1585                 // Get the `WebBackForwardList`.
1586                 WebBackForwardList webBackForwardList = mainWebView.copyBackForwardList();
1587
1588                 // Show the `UrlHistoryDialog` `AlertDialog` and name this instance `R.string.history`.  `this` is the `Context`.
1589                 AppCompatDialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(this, webBackForwardList);
1590                 urlHistoryDialogFragment.show(getSupportFragmentManager(), getResources().getString(R.string.history));
1591                 break;
1592
1593             case R.id.bookmarks:
1594                 // Launch BookmarksActivity.
1595                 Intent bookmarksIntent = new Intent(this, BookmarksActivity.class);
1596                 startActivity(bookmarksIntent);
1597                 break;
1598
1599             case R.id.downloads:
1600                 // Launch the system Download Manager.
1601                 Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
1602
1603                 // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
1604                 downloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1605
1606                 startActivity(downloadManagerIntent);
1607                 break;
1608
1609             case R.id.settings:
1610                 // Reset `currentDomainName` so that domain settings are reapplied after returning to `MainWebViewActivity`.
1611                 currentDomainName = "";
1612
1613                 // Launch `SettingsActivity`.
1614                 Intent settingsIntent = new Intent(this, SettingsActivity.class);
1615                 startActivity(settingsIntent);
1616                 break;
1617
1618             case R.id.domains:
1619                 // Reset `currentDomainName` so that domain settings are reapplied after returning to `MainWebViewActivity`.
1620                 currentDomainName = "";
1621
1622                 // Launch `DomainsActivity`.
1623                 Intent domainsIntent = new Intent(this, DomainsActivity.class);
1624                 startActivity(domainsIntent);
1625                 break;
1626
1627             case R.id.guide:
1628                 // Launch `GuideActivity`.
1629                 Intent guideIntent = new Intent(this, GuideActivity.class);
1630                 startActivity(guideIntent);
1631                 break;
1632
1633             case R.id.about:
1634                 // Launch `AboutActivity`.
1635                 Intent aboutIntent = new Intent(this, AboutActivity.class);
1636                 startActivity(aboutIntent);
1637                 break;
1638
1639             case R.id.clearAndExit:
1640                 // Get a handle for `sharedPreferences`.  `this` references the current context.
1641                 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
1642
1643                 boolean clearEverything = sharedPreferences.getBoolean("clear_everything", true);
1644
1645                 // Clear cookies.
1646                 if (clearEverything || sharedPreferences.getBoolean("clear_cookies", true)) {
1647                     // The command to remove cookies changed slightly in API 21.
1648                     if (Build.VERSION.SDK_INT >= 21) {
1649                         cookieManager.removeAllCookies(null);
1650                     } else {
1651                         cookieManager.removeAllCookie();
1652                     }
1653
1654                     // Manually delete the cookies database, as `CookieManager` sometimes will not flush its changes to disk before `System.exit(0)` is run.
1655                     try {
1656                         // We have to use two commands because `Runtime.exec()` does not like `*`.
1657                         privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies");
1658                         privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies-journal");
1659                     } catch (IOException e) {
1660                         // Do nothing if an error is thrown.
1661                     }
1662                 }
1663
1664                 // Clear DOM storage.
1665                 if (clearEverything || sharedPreferences.getBoolean("clear_dom_storage", true)) {
1666                     // Ask `WebStorage` to clear the DOM storage.
1667                     WebStorage webStorage = WebStorage.getInstance();
1668                     webStorage.deleteAllData();
1669
1670                     // Manually delete the DOM storage files and directories, as `WebStorage` sometimes will not flush its changes to disk before `System.exit(0)` is run.
1671                     try {
1672                         // We have to use a `String[]` because the directory contains a space and `Runtime.exec` will not escape the string correctly otherwise.
1673                         privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
1674
1675                         // We have to use multiple commands because `Runtime.exec()` does not like `*`.
1676                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
1677                         privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
1678                         privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
1679                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
1680                     } catch (IOException e) {
1681                         // Do nothing if an error is thrown.
1682                     }
1683                 }
1684
1685                 // Clear form data.
1686                 if (clearEverything || sharedPreferences.getBoolean("clear_form_data", true)) {
1687                     WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
1688                     webViewDatabase.clearFormData();
1689
1690                     // Manually delete the form data database, as `WebViewDatabase` sometimes will not flush its changes to disk before `System.exit(0)` is run.
1691                     try {
1692                         // We have to use a `String[]` because the database contains a space and `Runtime.exec` will not escape the string correctly otherwise.
1693                         privacyBrowserRuntime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data"});
1694                         privacyBrowserRuntime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data-journal"});
1695                     } catch (IOException e) {
1696                         // Do nothing if an error is thrown.
1697                     }
1698                 }
1699
1700                 // Clear the cache.
1701                 if (clearEverything || sharedPreferences.getBoolean("clear_cache", true)) {
1702                     // `true` includes disk files.
1703                     mainWebView.clearCache(true);
1704
1705                     // Manually delete the cache directories.
1706                     try {
1707                         // Delete the main cache directory.
1708                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
1709
1710                         // Delete the secondary `Service Worker` cache directory.  We have to use a `String[]` because the directory contains a space and `Runtime.exec` will not escape the string correctly otherwise.
1711                         privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
1712                     } catch (IOException e) {
1713                         // Do nothing if an error is thrown.
1714                     }
1715                 }
1716
1717                 // Clear SSL certificate preferences.
1718                 mainWebView.clearSslPreferences();
1719
1720                 // Clear the back/forward history.
1721                 mainWebView.clearHistory();
1722
1723                 // Clear `formattedUrlString`.
1724                 formattedUrlString = null;
1725
1726                 // Clear `customHeaders`.
1727                 customHeaders.clear();
1728
1729                 // Detach all views from `mainWebViewRelativeLayout`.
1730                 mainWebViewRelativeLayout.removeAllViews();
1731
1732                 // Destroy the internal state of `mainWebView`.
1733                 mainWebView.destroy();
1734
1735                 // Manually delete the `app_webview` folder, which contains the cookies, DOM storage, form data, and `Service Worker` cache.
1736                 // See `https://code.google.com/p/android/issues/detail?id=233826&thanks=233826&ts=1486670530`.
1737                 if (clearEverything) {
1738                     try {
1739                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview");
1740                     } catch (IOException e) {
1741                         // Do nothing if an error is thrown.
1742                     }
1743                 }
1744
1745                 // Close Privacy Browser.  `finishAndRemoveTask` also removes Privacy Browser from the recent app list.
1746                 if (Build.VERSION.SDK_INT >= 21) {
1747                     finishAndRemoveTask();
1748                 } else {
1749                     finish();
1750                 }
1751
1752                 // Remove the terminated program from RAM.  The status code is `0`.
1753                 System.exit(0);
1754                 break;
1755         }
1756
1757         // Close the navigation drawer.
1758         drawerLayout.closeDrawer(GravityCompat.START);
1759         return true;
1760     }
1761
1762     @Override
1763     public void onPostCreate(Bundle savedInstanceState) {
1764         super.onPostCreate(savedInstanceState);
1765
1766         // Sync the state of the DrawerToggle after onRestoreInstanceState has finished.
1767         drawerToggle.syncState();
1768     }
1769
1770     @Override
1771     public void onConfigurationChanged(Configuration newConfig) {
1772         super.onConfigurationChanged(newConfig);
1773
1774         // Reload the ad for the free flavor if we are not in full screen mode.
1775         if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
1776             // Reload the ad.
1777             BannerAd.reloadAfterRotate(adView, getApplicationContext(), getString(R.string.ad_id));
1778
1779             // Reinitialize the `adView` variable, as the `View` will have been removed and re-added by `BannerAd.reloadAfterRotate()`.
1780             adView = findViewById(R.id.adview);
1781         }
1782
1783         // `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:  https://code.google.com/p/android/issues/detail?id=20493#c8
1784         // ActivityCompat.invalidateOptionsMenu(this);
1785     }
1786
1787     @Override
1788     public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
1789         // Store the `HitTestResult`.
1790         final WebView.HitTestResult hitTestResult = mainWebView.getHitTestResult();
1791
1792         // Create strings.
1793         final String imageUrl;
1794         final String linkUrl;
1795
1796         // Get a handle for the `ClipboardManager`.
1797         final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
1798
1799         switch (hitTestResult.getType()) {
1800             // `SRC_ANCHOR_TYPE` is a link.
1801             case WebView.HitTestResult.SRC_ANCHOR_TYPE:
1802                 // Get the target URL.
1803                 linkUrl = hitTestResult.getExtra();
1804
1805                 // Set the target URL as the title of the `ContextMenu`.
1806                 menu.setHeaderTitle(linkUrl);
1807
1808                 // Add a `Load URL` entry.
1809                 menu.add(R.string.load_url).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1810                     @Override
1811                     public boolean onMenuItemClick(MenuItem item) {
1812                         loadUrl(linkUrl);
1813                         return false;
1814                     }
1815                 });
1816
1817                 // Add a `Copy URL` entry.
1818                 menu.add(R.string.copy_url).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1819                     @Override
1820                     public boolean onMenuItemClick(MenuItem item) {
1821                         // Save the link URL in a `ClipData`.
1822                         ClipData srcAnchorTypeClipData = ClipData.newPlainText(getResources().getString(R.string.url), linkUrl);
1823
1824                         // Set the `ClipData` as the clipboard's primary clip.
1825                         clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
1826                         return false;
1827                     }
1828                 });
1829
1830                 // Add a `Cancel` entry, which by default closes the `ContextMenu`.
1831                 menu.add(R.string.cancel);
1832                 break;
1833
1834             case WebView.HitTestResult.EMAIL_TYPE:
1835                 // Get the target URL.
1836                 linkUrl = hitTestResult.getExtra();
1837
1838                 // Set the target URL as the title of the `ContextMenu`.
1839                 menu.setHeaderTitle(linkUrl);
1840
1841                 // Add a `Write Email` entry.
1842                 menu.add(R.string.write_email).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1843                     @Override
1844                     public boolean onMenuItemClick(MenuItem item) {
1845                         // We use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
1846                         Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
1847
1848                         // Parse the url and set it as the data for the `Intent`.
1849                         emailIntent.setData(Uri.parse("mailto:" + linkUrl));
1850
1851                         // `FLAG_ACTIVITY_NEW_TASK` opens the email program in a new task instead as part of Privacy Browser.
1852                         emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1853
1854                         // Make it so.
1855                         startActivity(emailIntent);
1856                         return false;
1857                     }
1858                 });
1859
1860                 // Add a `Copy Email Address` entry.
1861                 menu.add(R.string.copy_email_address).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1862                     @Override
1863                     public boolean onMenuItemClick(MenuItem item) {
1864                         // Save the email address in a `ClipData`.
1865                         ClipData srcEmailTypeClipData = ClipData.newPlainText(getResources().getString(R.string.email_address), linkUrl);
1866
1867                         // Set the `ClipData` as the clipboard's primary clip.
1868                         clipboardManager.setPrimaryClip(srcEmailTypeClipData);
1869                         return false;
1870                     }
1871                 });
1872
1873                 // Add a `Cancel` entry, which by default closes the `ContextMenu`.
1874                 menu.add(R.string.cancel);
1875                 break;
1876
1877             // `IMAGE_TYPE` is an image.
1878             case WebView.HitTestResult.IMAGE_TYPE:
1879                 // Get the image URL.
1880                 imageUrl = hitTestResult.getExtra();
1881
1882                 // Set the image URL as the title of the `ContextMenu`.
1883                 menu.setHeaderTitle(imageUrl);
1884
1885                 // Add a `View Image` entry.
1886                 menu.add(R.string.view_image).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1887                     @Override
1888                     public boolean onMenuItemClick(MenuItem item) {
1889                         loadUrl(imageUrl);
1890                         return false;
1891                     }
1892                 });
1893
1894                 // Add a `Download Image` entry.
1895                 menu.add(R.string.download_image).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1896                     @Override
1897                     public boolean onMenuItemClick(MenuItem item) {
1898                         // Show the `DownloadImageDialog` `AlertDialog` and name this instance `@string/download`.
1899                         AppCompatDialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
1900                         downloadImageDialogFragment.show(getSupportFragmentManager(), getResources().getString(R.string.download));
1901                         return false;
1902                     }
1903                 });
1904
1905                 // Add a `Copy URL` entry.
1906                 menu.add(R.string.copy_url).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1907                     @Override
1908                     public boolean onMenuItemClick(MenuItem item) {
1909                         // Save the image URL in a `ClipData`.
1910                         ClipData srcImageTypeClipData = ClipData.newPlainText(getResources().getString(R.string.url), imageUrl);
1911
1912                         // Set the `ClipData` as the clipboard's primary clip.
1913                         clipboardManager.setPrimaryClip(srcImageTypeClipData);
1914                         return false;
1915                     }
1916                 });
1917
1918                 // Add a `Cancel` entry, which by default closes the `ContextMenu`.
1919                 menu.add(R.string.cancel);
1920                 break;
1921
1922
1923             // `SRC_IMAGE_ANCHOR_TYPE` is an image that is also a link.
1924             case WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE:
1925                 // Get the image URL.
1926                 imageUrl = hitTestResult.getExtra();
1927
1928                 // Set the image URL as the title of the `ContextMenu`.
1929                 menu.setHeaderTitle(imageUrl);
1930
1931                 // Add a `View Image` entry.
1932                 menu.add(R.string.view_image).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1933                     @Override
1934                     public boolean onMenuItemClick(MenuItem item) {
1935                         loadUrl(imageUrl);
1936                         return false;
1937                     }
1938                 });
1939
1940                 // Add a `Download Image` entry.
1941                 menu.add(R.string.download_image).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1942                     @Override
1943                     public boolean onMenuItemClick(MenuItem item) {
1944                         // Show the `DownloadImageDialog` `AlertDialog` and name this instance `@string/download`.
1945                         AppCompatDialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
1946                         downloadImageDialogFragment.show(getSupportFragmentManager(), getResources().getString(R.string.download));
1947                         return false;
1948                     }
1949                 });
1950
1951                 // Add a `Copy URL` entry.
1952                 menu.add(R.string.copy_url).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1953                     @Override
1954                     public boolean onMenuItemClick(MenuItem item) {
1955                         // Save the image URL in a `ClipData`.
1956                         ClipData srcImageAnchorTypeClipData = ClipData.newPlainText(getResources().getString(R.string.url), imageUrl);
1957
1958                         // Set the `ClipData` as the clipboard's primary clip.
1959                         clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
1960                         return false;
1961                     }
1962                 });
1963
1964                 // Add a `Cancel` entry, which by default closes the `ContextMenu`.
1965                 menu.add(R.string.cancel);
1966                 break;
1967         }
1968     }
1969
1970     @Override
1971     public void onCreateHomeScreenShortcut(AppCompatDialogFragment dialogFragment) {
1972         // Get shortcutNameEditText from the alert dialog.
1973         EditText shortcutNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.shortcut_name_edittext);
1974
1975         // Create the bookmark shortcut based on formattedUrlString.
1976         Intent bookmarkShortcut = new Intent();
1977         bookmarkShortcut.setAction(Intent.ACTION_VIEW);
1978         bookmarkShortcut.setData(Uri.parse(formattedUrlString));
1979
1980         // Place the bookmark shortcut on the home screen.
1981         Intent placeBookmarkShortcut = new Intent();
1982         placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.INTENT", bookmarkShortcut);
1983         placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.NAME", shortcutNameEditText.getText().toString());
1984         placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.ICON", favoriteIconBitmap);
1985         placeBookmarkShortcut.setAction("com.android.launcher.action.INSTALL_SHORTCUT");
1986         sendBroadcast(placeBookmarkShortcut);
1987     }
1988
1989     @Override
1990     public void onDownloadImage(AppCompatDialogFragment dialogFragment, String imageUrl) {
1991         // Download the image if it has an HTTP or HTTPS URI.
1992         if (imageUrl.startsWith("http")) {
1993             // Get a handle for the system `DOWNLOAD_SERVICE`.
1994             DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
1995
1996             // Parse `imageUrl`.
1997             DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(imageUrl));
1998
1999             // Pass cookies to download manager if cookies are enabled.  This is required to download images from websites that require a login.
2000             // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
2001             if (firstPartyCookiesEnabled) {
2002                 // Get the cookies for `imageUrl`.
2003                 String cookies = cookieManager.getCookie(imageUrl);
2004
2005                 // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
2006                 downloadRequest.addRequestHeader("Cookie", cookies);
2007             }
2008
2009             // Get the file name from `dialogFragment`.
2010             EditText downloadImageNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.download_image_name);
2011             String imageName = downloadImageNameEditText.getText().toString();
2012
2013             // Once we have `WRITE_EXTERNAL_STORAGE` permissions we can use `setDestinationInExternalPublicDir`.
2014             if (Build.VERSION.SDK_INT >= 23) { // If API >= 23, set the download save in the the `DIRECTORY_DOWNLOADS` using `imageName`.
2015                 downloadRequest.setDestinationInExternalFilesDir(this, "/", imageName);
2016             } else { // Only set the title using `imageName`.
2017                 downloadRequest.setTitle(imageName);
2018             }
2019
2020             // Allow `MediaScanner` to index the download if it is a media file.
2021             downloadRequest.allowScanningByMediaScanner();
2022
2023             // Add the URL as the description for the download.
2024             downloadRequest.setDescription(imageUrl);
2025
2026             // Show the download notification after the download is completed.
2027             downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
2028
2029             // Initiate the download.
2030             downloadManager.enqueue(downloadRequest);
2031         } else {  // The image is not an HTTP or HTTPS URI.
2032             Snackbar.make(mainWebView, R.string.cannot_download_image, Snackbar.LENGTH_INDEFINITE).show();
2033         }
2034     }
2035
2036     @Override
2037     public void onDownloadFile(AppCompatDialogFragment dialogFragment, String downloadUrl) {
2038         // Download the file if it has an HTTP or HTTPS URI.
2039         if (downloadUrl.startsWith("http")) {
2040
2041             // Get a handle for the system `DOWNLOAD_SERVICE`.
2042             DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
2043
2044             // Parse `downloadUrl`.
2045             DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(downloadUrl));
2046
2047             // Pass cookies to download manager if cookies are enabled.  This is required to download files from websites that require a login.
2048             // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
2049             if (firstPartyCookiesEnabled) {
2050                 // Get the cookies for `downloadUrl`.
2051                 String cookies = cookieManager.getCookie(downloadUrl);
2052
2053                 // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
2054                 downloadRequest.addRequestHeader("Cookie", cookies);
2055             }
2056
2057             // Get the file name from `dialogFragment`.
2058             EditText downloadFileNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.download_file_name);
2059             String fileName = downloadFileNameEditText.getText().toString();
2060
2061             // Once we have `WRITE_EXTERNAL_STORAGE` permissions we can use `setDestinationInExternalPublicDir`.
2062             if (Build.VERSION.SDK_INT >= 23) { // If API >= 23, set the download location to `/sdcard/Android/data/com.stoutner.privacybrowser.standard/files` named `fileName`.
2063                 downloadRequest.setDestinationInExternalFilesDir(this, "/", fileName);
2064             } else { // Only set the title using `fileName`.
2065                 downloadRequest.setTitle(fileName);
2066             }
2067
2068             // Allow `MediaScanner` to index the download if it is a media file.
2069             downloadRequest.allowScanningByMediaScanner();
2070
2071             // Add the URL as the description for the download.
2072             downloadRequest.setDescription(downloadUrl);
2073
2074             // Show the download notification after the download is completed.
2075             downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
2076
2077             // Initiate the download.
2078             downloadManager.enqueue(downloadRequest);
2079         } else {  // The download is not an HTTP or HTTPS URI.
2080             Snackbar.make(mainWebView, R.string.cannot_download_file, Snackbar.LENGTH_INDEFINITE).show();
2081         }
2082     }
2083
2084     public void viewSslCertificate(View view) {
2085         // Show the `ViewSslCertificateDialog` `AlertDialog` and name this instance `@string/view_ssl_certificate`.
2086         DialogFragment viewSslCertificateDialogFragment = new ViewSslCertificateDialog();
2087         viewSslCertificateDialogFragment.show(getFragmentManager(), getResources().getString(R.string.view_ssl_certificate));
2088     }
2089
2090     @Override
2091     public void onSslErrorCancel() {
2092         sslErrorHandler.cancel();
2093     }
2094
2095     @Override
2096     public void onSslErrorProceed() {
2097         sslErrorHandler.proceed();
2098     }
2099
2100     @Override
2101     public void onUrlHistoryEntrySelected(int moveBackOrForwardSteps) {
2102         // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
2103         navigatingHistory = true;
2104
2105         // Load the history entry.
2106         mainWebView.goBackOrForward(moveBackOrForwardSteps);
2107     }
2108
2109     @Override
2110     public void onClearHistory() {
2111         // Clear the history.
2112         mainWebView.clearHistory();
2113     }
2114
2115     // Override `onBackPressed` to handle the navigation drawer and `mainWebView`.
2116     @Override
2117     public void onBackPressed() {
2118         // Close the navigation drawer if it is available.  GravityCompat.START is the drawer on the left on Left-to-Right layout text.
2119         if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
2120             drawerLayout.closeDrawer(GravityCompat.START);
2121         } else {
2122             // Load the previous URL if available.
2123             if (mainWebView.canGoBack()) {
2124                 // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
2125                 navigatingHistory = true;
2126
2127                 // Go back.
2128                 mainWebView.goBack();
2129             } else {
2130                 // Pass `onBackPressed()` to the system.
2131                 super.onBackPressed();
2132             }
2133         }
2134     }
2135
2136     private void loadUrlFromTextBox() throws UnsupportedEncodingException {
2137         // Get the text from urlTextBox and convert it to a string.  trim() removes white spaces from the beginning and end of the string.
2138         String unformattedUrlString = urlTextBox.getText().toString().trim();
2139
2140         // Check to see if `unformattedUrlString` is a valid URL.  Otherwise, convert it into a search.
2141         if ((Patterns.WEB_URL.matcher(unformattedUrlString).matches()) || (unformattedUrlString.startsWith("http://")) || (unformattedUrlString.startsWith("https://"))) {
2142             // Add `http://` at the beginning if it is missing.  Otherwise the app will segfault.
2143             if (!unformattedUrlString.startsWith("http")) {
2144                 unformattedUrlString = "http://" + unformattedUrlString;
2145             }
2146
2147             // Initialize `unformattedUrl`.
2148             URL unformattedUrl = null;
2149
2150             // Convert `unformattedUrlString` to a `URL`, then to a `URI`, and then back to a `String`, which sanitizes the input and adds in any missing components.
2151             try {
2152                 unformattedUrl = new URL(unformattedUrlString);
2153             } catch (MalformedURLException e) {
2154                 e.printStackTrace();
2155             }
2156
2157             // The ternary operator (? :) makes sure that a null pointer exception is not thrown, which would happen if `.get` was called on a `null` value.
2158             final String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null;
2159             final String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null;
2160             final String path = unformattedUrl != null ? unformattedUrl.getPath() : null;
2161             final String query = unformattedUrl != null ? unformattedUrl.getQuery() : null;
2162             final String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null;
2163
2164             // Build the URI.
2165             Uri.Builder formattedUri = new Uri.Builder();
2166             formattedUri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
2167
2168             // Decode `formattedUri` as a `String` in `UTF-8`.
2169             formattedUrlString = URLDecoder.decode(formattedUri.build().toString(), "UTF-8");
2170         } else {
2171             // Sanitize the search input and convert it to a search.
2172             final String encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
2173
2174             // Add the base search URL.
2175             formattedUrlString = searchURL + encodedUrlString;
2176         }
2177
2178         loadUrl(formattedUrlString);
2179
2180         // Hide the keyboard so we can see the webpage.  `0` indicates no additional flags.
2181         inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
2182     }
2183
2184
2185     private void loadUrl(String url) {
2186         // Apply any custom domain settings.
2187         applyDomainSettings(url);
2188
2189         // Load the URL.
2190         mainWebView.loadUrl(url, customHeaders);
2191
2192         // Set `urlIsLoading` to prevent changes in the user agent on websites with redirects from reloading the current website.
2193         urlIsLoading = true;
2194     }
2195
2196     public void findPreviousOnPage(View view) {
2197         // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
2198         mainWebView.findNext(false);
2199     }
2200
2201     public void findNextOnPage(View view) {
2202         // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
2203         mainWebView.findNext(true);
2204     }
2205
2206     public void closeFindOnPage(View view) {
2207         // Delete the contents of `find_on_page_edittext`.
2208         findOnPageEditText.setText(null);
2209
2210         // Clear the highlighted phrases.
2211         mainWebView.clearMatches();
2212
2213         // Hide the Find on Page `RelativeLayout`.
2214         findOnPageLinearLayout.setVisibility(View.GONE);
2215
2216         // Show the URL app bar.
2217         supportAppBar.setVisibility(View.VISIBLE);
2218
2219         // Hide the keyboard so we can see the webpage.  `0` indicates no additional flags.
2220         inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
2221     }
2222
2223     private void applyAppSettings() {
2224         // Get a handle for `sharedPreferences`.  `this` references the current context.
2225         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
2226
2227         // Store the values from `sharedPreferences` in variables.
2228         String homepageString = sharedPreferences.getString("homepage", "https://start.duckduckgo.com");
2229         String torHomepageString = sharedPreferences.getString("tor_homepage", "https://3g2upl4pq6kufc4m.onion");
2230         String torSearchString = sharedPreferences.getString("tor_search", "https://3g2upl4pq6kufc4m.onion/html/?q=");
2231         String torSearchCustomURLString = sharedPreferences.getString("tor_search_custom_url", "");
2232         String searchString = sharedPreferences.getString("search", "https://duckduckgo.com/html/?q=");
2233         String searchCustomURLString = sharedPreferences.getString("search_custom_url", "");
2234         adBlockerEnabled = sharedPreferences.getBoolean("block_ads", true);
2235         incognitoModeEnabled = sharedPreferences.getBoolean("incognito_mode", false);
2236         boolean doNotTrackEnabled = sharedPreferences.getBoolean("do_not_track", false);
2237         boolean proxyThroughOrbot = sharedPreferences.getBoolean("proxy_through_orbot", false);
2238         fullScreenBrowsingModeEnabled = sharedPreferences.getBoolean("full_screen_browsing_mode", false);
2239         hideSystemBarsOnFullscreen = sharedPreferences.getBoolean("hide_system_bars", false);
2240         translucentNavigationBarOnFullscreen = sharedPreferences.getBoolean("translucent_navigation_bar", true);
2241         swipeToRefreshEnabled = sharedPreferences.getBoolean("swipe_to_refresh", false);
2242         displayWebpageImagesBoolean = sharedPreferences.getBoolean("display_webpage_images", true);
2243
2244         // Set the homepage, search, and proxy options.
2245         if (proxyThroughOrbot) {  // Set the Tor options.
2246             // Set `torHomepageString` as `homepage`.
2247             homepage = torHomepageString;
2248
2249             // If formattedUrlString is null assign the homepage to it.
2250             if (formattedUrlString == null) {
2251                 formattedUrlString = homepage;
2252             }
2253
2254             // Set the search URL.
2255             if (torSearchString.equals("Custom URL")) {  // Get the custom URL string.
2256                 searchURL = torSearchCustomURLString;
2257             } else {  // Use the string from the pre-built list.
2258                 searchURL = torSearchString;
2259             }
2260
2261             // Set the proxy.  `this` refers to the current activity where an `AlertDialog` might be displayed.
2262             OrbotProxyHelper.setProxy(getApplicationContext(), this, "localhost", "8118");
2263
2264             // Set the `appBar` background to indicate proxying through Orbot is enabled.  `this` refers to the context.
2265             if (darkTheme) {
2266                 appBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.dark_blue_30));
2267             } else {
2268                 appBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.blue_50));
2269             }
2270
2271             // Display a message to the user if we are waiting on Orbot.
2272             if (!orbotStatus.equals("ON")) {
2273                 // Set `waitingForOrbot`.
2274                 waitingForOrbot = true;
2275
2276                 // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
2277                 mainWebView.loadData(waitingForOrbotHTMLString, "text/html", null);
2278             }
2279         } else {  // Set the non-Tor options.
2280             // Set `homepageString` as `homepage`.
2281             homepage = homepageString;
2282
2283             // If formattedUrlString is null assign the homepage to it.
2284             if (formattedUrlString == null) {
2285                 formattedUrlString = homepage;
2286             }
2287
2288             // Set the search URL.
2289             if (searchString.equals("Custom URL")) {  // Get the custom URL string.
2290                 searchURL = searchCustomURLString;
2291             } else {  // Use the string from the pre-built list.
2292                 searchURL = searchString;
2293             }
2294
2295             // Reset the proxy to default.  The host is `""` and the port is `"0"`.
2296             OrbotProxyHelper.setProxy(getApplicationContext(), this, "", "0");
2297
2298             // Set the default `appBar` background.  `this` refers to the context.
2299             if (darkTheme) {
2300                 appBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.gray_900));
2301             } else {
2302                 appBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.gray_100));
2303             }
2304
2305             // Reset `waitingForOrbot.
2306             waitingForOrbot = false;
2307         }
2308
2309         // Set swipe to refresh.
2310         swipeRefreshLayout.setEnabled(swipeToRefreshEnabled);
2311
2312         // Set Do Not Track status.
2313         if (doNotTrackEnabled) {
2314             customHeaders.put("DNT", "1");
2315         } else {
2316             customHeaders.remove("DNT");
2317         }
2318
2319         // Apply the appropriate full screen mode the `SYSTEM_UI` flags.
2320         if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {
2321             if (hideSystemBarsOnFullscreen) {  // Hide everything.
2322                 // Remove the translucent navigation setting if it is currently flagged.
2323                 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
2324
2325                 // Remove the translucent status bar overlay.
2326                 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
2327
2328                 // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
2329                 drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
2330
2331                 /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
2332                  * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
2333                  * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically rehides them after they are shown.
2334                  */
2335                 rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
2336             } else {  // Hide everything except the status and navigation bars.
2337                 // Add the translucent status flag if it is unset.
2338                 getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
2339
2340                 if (translucentNavigationBarOnFullscreen) {
2341                     // Set the navigation bar to be translucent.
2342                     getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
2343                 } else {
2344                     // Set the navigation bar to be black.
2345                     getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
2346                 }
2347             }
2348         } else {  // Switch to normal viewing mode.
2349             // Reset `inFullScreenBrowsingMode` to `false`.
2350             inFullScreenBrowsingMode = false;
2351
2352             // Show the `appBar` if `findOnPageLinearLayout` is not visible.
2353             if (findOnPageLinearLayout.getVisibility() == View.GONE) {
2354                 appBar.show();
2355             }
2356
2357             // Show the `BannerAd` in the free flavor.
2358             if (BuildConfig.FLAVOR.contentEquals("free")) {
2359                 // Reload the ad.  Because the screen may have rotated, we need to use `reloadAfterRotate`.
2360                 BannerAd.reloadAfterRotate(adView, getApplicationContext(), getString(R.string.ad_id));
2361
2362                 // Reinitialize the `adView` variable, as the `View` will have been removed and re-added by `BannerAd.reloadAfterRotate()`.
2363                 adView = findViewById(R.id.adview);
2364             }
2365
2366             // Remove the translucent navigation bar flag if it is set.
2367             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
2368
2369             // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
2370             getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
2371
2372             // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
2373             rootCoordinatorLayout.setSystemUiVisibility(0);
2374
2375             // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
2376             rootCoordinatorLayout.setFitsSystemWindows(true);
2377         }
2378     }
2379
2380     // We have to use the deprecated `.getDrawable()` until the minimum API >= 21.
2381     @SuppressWarnings("deprecation")
2382     private void applyDomainSettings(String url) {
2383         // Reset `navigatingHistory`.
2384         navigatingHistory = false;
2385
2386         // Parse the URL into a URI.
2387         Uri uri = Uri.parse(url);
2388
2389         // Extract the domain from `uri`.
2390         String hostName = uri.getHost();
2391
2392         // Initialize `loadingNewDomainName`.
2393         boolean loadingNewDomainName;
2394
2395         // If either `hostName` or `currentDomainName` are `null`, run the options for loading a new domain name.
2396         // The lint suggestion to simplify the `if` statement is incorrect, because `hostName.equals(currentDomainName)` can produce a `null object reference.`
2397         //noinspection SimplifiableIfStatement
2398         if ((hostName == null) || (currentDomainName == null)) {
2399             loadingNewDomainName = true;
2400         } else {  // Determine if `hostName` equals `currentDomainName`.
2401             loadingNewDomainName = !hostName.equals(currentDomainName);
2402         }
2403
2404         // Only apply the domain settings if we are loading a new domain.  This allows the user to set temporary settings for JavaScript, cookies, DOM storage, etc.
2405         if (loadingNewDomainName) {
2406             // Set the new `hostname` as the `currentDomainName`.
2407             currentDomainName = hostName;
2408
2409             // Reset `favoriteIconBitmap` and display it in the `appbar`.
2410             favoriteIconBitmap = favoriteIconDefaultBitmap;
2411             favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(favoriteIconBitmap, 64, 64, true));
2412
2413             // Initialize the database handler.  `this` specifies the context.  The two `nulls` do not specify the database name or a `CursorFactory`.
2414             // The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
2415             DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
2416
2417             // Get a full cursor from `domainsDatabaseHelper`.
2418             Cursor domainNameCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
2419
2420             // Initialize `domainSettingsSet`.
2421             Set<String> domainSettingsSet = new HashSet<>();
2422
2423             // Get the domain name column index.
2424             int domainNameColumnIndex = domainNameCursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME);
2425
2426             // Populate `domainSettingsSet`.
2427             for (int i = 0; i < domainNameCursor.getCount(); i++) {
2428                 // Move `domainsCursor` to the current row.
2429                 domainNameCursor.moveToPosition(i);
2430
2431                 // Store the domain name in `domainSettingsSet`.
2432                 domainSettingsSet.add(domainNameCursor.getString(domainNameColumnIndex));
2433             }
2434
2435             // Close `domainNameCursor.
2436             domainNameCursor.close();
2437
2438             // Initialize variables to track if domain settings will be applied and, if so, under which name.
2439             domainSettingsApplied = false;
2440             String domainNameInDatabase = null;
2441
2442             // Check the hostname.
2443             if (domainSettingsSet.contains(hostName)) {
2444                 domainSettingsApplied = true;
2445                 domainNameInDatabase = hostName;
2446             }
2447
2448             // If `hostName` is not `null`, check all the subdomains of `hostName` against wildcard domains in `domainCursor`.
2449             if (hostName != null) {
2450                 while (hostName.contains(".") && !domainSettingsApplied) {  // Stop checking if we run out of  `.` or if we already know that `domainSettingsApplied` is `true`.
2451                     if (domainSettingsSet.contains("*." + hostName)) {  // Check the host name prepended by `*.`.
2452                         domainSettingsApplied = true;
2453                         domainNameInDatabase = "*." + hostName;
2454                     }
2455
2456                     // Strip out the lowest subdomain of `host`.
2457                     hostName = hostName.substring(hostName.indexOf(".") + 1);
2458                 }
2459             }
2460
2461             // Get a handle for the shared preference.  `this` references the current context.
2462             SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
2463
2464             // Store the default font size and user agent information.
2465             String defaultFontSizeString = sharedPreferences.getString("default_font_size", "100");
2466             String defaultUserAgentString = sharedPreferences.getString("user_agent", "PrivacyBrowser/1.0");
2467             String defaultCustomUserAgentString = sharedPreferences.getString("custom_user_agent", "PrivacyBrowser/1.0");
2468
2469             if (domainSettingsApplied) {  // The url we are loading has custom domain settings.
2470                 // Get a cursor for the current host and move it to the first position.
2471                 Cursor currentHostDomainSettingsCursor = domainsDatabaseHelper.getCursorForDomainName(domainNameInDatabase);
2472                 currentHostDomainSettingsCursor.moveToFirst();
2473
2474                 // Get the settings from the cursor.
2475                 javaScriptEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_JAVASCRIPT)) == 1);
2476                 firstPartyCookiesEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FIRST_PARTY_COOKIES)) == 1);
2477                 thirdPartyCookiesEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_THIRD_PARTY_COOKIES)) == 1);
2478                 domStorageEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_DOM_STORAGE)) == 1);
2479                 saveFormDataEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FORM_DATA)) == 1);
2480                 String userAgentString = currentHostDomainSettingsCursor.getString(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.USER_AGENT));
2481                 int fontSize = currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.FONT_SIZE));
2482                 displayWebpageImagesInt = currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.DISPLAY_IMAGES));
2483
2484                 // Close `currentHostDomainSettingsCursor`.
2485                 currentHostDomainSettingsCursor.close();
2486
2487                 // Apply the domain settings.
2488                 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
2489                 cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
2490                 mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
2491                 mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
2492
2493                 // Apply the font size.
2494                 if (fontSize == 0) {  // Apply the default font size.
2495                     mainWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
2496                 } else {  // Apply the specified font size.
2497                     mainWebView.getSettings().setTextZoom(fontSize);
2498                 }
2499
2500                 // Set third-party cookies status if API >= 21.
2501                 if (Build.VERSION.SDK_INT >= 21) {
2502                     cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
2503                 }
2504
2505                 // Only set the user agent if the webpage is not currently loading.  Otherwise, changing the user agent on redirects can cause the original website to reload.  <https://redmine.stoutner.com/issues/160>
2506                 if (!urlIsLoading) {
2507                     switch (userAgentString) {
2508                         case "System default user agent":
2509                             // Set the user agent according to the system default.
2510                             switch (defaultUserAgentString) {
2511                                 case "WebView default user agent":
2512                                     // Set the user agent to `""`, which uses the default value.
2513                                     mainWebView.getSettings().setUserAgentString("");
2514                                     break;
2515
2516                                 case "Custom user agent":
2517                                     // Set the custom user agent.
2518                                     mainWebView.getSettings().setUserAgentString(defaultCustomUserAgentString);
2519                                     break;
2520
2521                                 default:
2522                                     // Use the selected user agent.
2523                                     mainWebView.getSettings().setUserAgentString(defaultUserAgentString);
2524                             }
2525                             break;
2526
2527                         case "WebView default user agent":
2528                             // Set the user agent to `""`, which uses the default value.
2529                             mainWebView.getSettings().setUserAgentString("");
2530                             break;
2531
2532                         default:
2533                             // Use the selected user agent.
2534                             mainWebView.getSettings().setUserAgentString(userAgentString);
2535                     }
2536                 }
2537
2538                 // Set a green background on `urlTextBox` to indicate that custom domain settings are being used.  We have to use the deprecated `.getDrawable()` until the minimum API >= 21.
2539                 if (darkTheme) {
2540                     urlAppBarRelativeLayout.setBackground(getResources().getDrawable(R.drawable.url_bar_background_dark_blue));
2541                 } else {
2542                     urlAppBarRelativeLayout.setBackground(getResources().getDrawable(R.drawable.url_bar_background_light_green));
2543                 }
2544             } else {  // The URL we are loading does not have custom domain settings.  Load the defaults.
2545                 // Store the values from `sharedPreferences` in variables.
2546                 javaScriptEnabled = sharedPreferences.getBoolean("javascript_enabled", false);
2547                 firstPartyCookiesEnabled = sharedPreferences.getBoolean("first_party_cookies_enabled", false);
2548                 thirdPartyCookiesEnabled = sharedPreferences.getBoolean("third_party_cookies_enabled", false);
2549                 domStorageEnabled = sharedPreferences.getBoolean("dom_storage_enabled", false);
2550                 saveFormDataEnabled = sharedPreferences.getBoolean("save_form_data_enabled", false);
2551
2552                 // Apply the default settings.
2553                 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
2554                 cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
2555                 mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
2556                 mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
2557                 mainWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
2558
2559                 // Set third-party cookies status if API >= 21.
2560                 if (Build.VERSION.SDK_INT >= 21) {
2561                     cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
2562                 }
2563
2564                 // Only set the user agent if the webpage is not currently loading.  Otherwise, changing the user agent on redirects can cause the original website to reload.  <https://redmine.stoutner.com/issues/160>
2565                 if (!urlIsLoading) {
2566                     switch (defaultUserAgentString) {
2567                         case "WebView default user agent":
2568                             // Set the user agent to `""`, which uses the default value.
2569                             mainWebView.getSettings().setUserAgentString("");
2570                             break;
2571
2572                         case "Custom user agent":
2573                             // Set the custom user agent.
2574                             mainWebView.getSettings().setUserAgentString(defaultCustomUserAgentString);
2575                             break;
2576
2577                         default:
2578                             // Use the selected user agent.
2579                             mainWebView.getSettings().setUserAgentString(defaultUserAgentString);
2580                     }
2581                 }
2582
2583                 // Set a transparent background on `urlTextBox`.  We have to use the deprecated `.getDrawable()` until the minimum API >= 21.
2584                 urlAppBarRelativeLayout.setBackgroundDrawable(getResources().getDrawable(R.color.transparent));
2585             }
2586
2587             // Close `domainsDatabaseHelper`.
2588             domainsDatabaseHelper.close();
2589
2590             // Remove the `onTheFlyDisplayImagesSet` flag and set the display webpage images mode.  `true` indicates that custom domain settings are applied.
2591             onTheFlyDisplayImagesSet = false;
2592             setDisplayWebpageImages();
2593
2594             // Update the privacy icons, but only if `mainMenu` has already been populated.
2595             if (mainMenu != null) {
2596                 updatePrivacyIcons(true);
2597             }
2598         }
2599     }
2600
2601     private void setDisplayWebpageImages() {
2602         if (!onTheFlyDisplayImagesSet) {
2603             if (domainSettingsApplied) {  // Custom domain settings are applied.
2604                 switch (displayWebpageImagesInt) {
2605                     case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_SYSTEM_DEFAULT:
2606                         mainWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImagesBoolean);
2607                         break;
2608
2609                     case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_ENABLED:
2610                         mainWebView.getSettings().setLoadsImagesAutomatically(true);
2611                         break;
2612
2613                     case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_DISABLED:
2614                         mainWebView.getSettings().setLoadsImagesAutomatically(false);
2615                         break;
2616                 }
2617             } else {  // Default settings are applied.
2618                 mainWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImagesBoolean);
2619             }
2620         }
2621     }
2622
2623     private void updatePrivacyIcons(boolean runInvalidateOptionsMenu) {
2624         // Get handles for the icons.
2625         MenuItem privacyIconMenuItem = mainMenu.findItem(R.id.toggle_javascript);
2626         MenuItem firstPartyCookiesIconMenuItem = mainMenu.findItem(R.id.toggle_first_party_cookies);
2627         MenuItem domStorageIconMenuItem = mainMenu.findItem(R.id.toggle_dom_storage);
2628         MenuItem formDataIconMenuItem = mainMenu.findItem(R.id.toggle_save_form_data);
2629
2630         // Update `privacyIcon`.