Create a dark theme for `MainWebViewActivity`.
[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.Typeface;
38 import android.graphics.drawable.BitmapDrawable;
39 import android.graphics.drawable.Drawable;
40 import android.net.Uri;
41 import android.net.http.SslCertificate;
42 import android.net.http.SslError;
43 import android.os.Build;
44 import android.os.Bundle;
45 import android.preference.PreferenceManager;
46 import android.print.PrintDocumentAdapter;
47 import android.print.PrintManager;
48 import android.support.annotation.NonNull;
49 import android.support.design.widget.CoordinatorLayout;
50 import android.support.design.widget.NavigationView;
51 import android.support.design.widget.Snackbar;
52 import android.support.v4.app.ActivityCompat;
53 import android.support.v4.content.ContextCompat;
54 import android.support.v4.view.GravityCompat;
55 import android.support.v4.widget.DrawerLayout;
56 import android.support.v4.widget.SwipeRefreshLayout;
57 import android.support.v7.app.ActionBar;
58 import android.support.v7.app.ActionBarDrawerToggle;
59 import android.support.v7.app.AppCompatActivity;
60 import android.support.v7.app.AppCompatDialogFragment;
61 import android.support.v7.widget.Toolbar;
62 import android.text.Editable;
63 import android.text.Spanned;
64 import android.text.TextWatcher;
65 import android.text.style.ForegroundColorSpan;
66 import android.text.style.StyleSpan;
67 import android.util.Patterns;
68 import android.view.ContextMenu;
69 import android.view.GestureDetector;
70 import android.view.KeyEvent;
71 import android.view.Menu;
72 import android.view.MenuItem;
73 import android.view.MotionEvent;
74 import android.view.View;
75 import android.view.WindowManager;
76 import android.view.inputmethod.InputMethodManager;
77 import android.webkit.CookieManager;
78 import android.webkit.DownloadListener;
79 import android.webkit.SslErrorHandler;
80 import android.webkit.WebBackForwardList;
81 import android.webkit.WebChromeClient;
82 import android.webkit.WebResourceResponse;
83 import android.webkit.WebStorage;
84 import android.webkit.WebView;
85 import android.webkit.WebViewClient;
86 import android.webkit.WebViewDatabase;
87 import android.widget.EditText;
88 import android.widget.FrameLayout;
89 import android.widget.ImageView;
90 import android.widget.LinearLayout;
91 import android.widget.ProgressBar;
92 import android.widget.RelativeLayout;
93 import android.widget.TextView;
94
95 import com.stoutner.privacybrowser.BannerAd;
96 import com.stoutner.privacybrowser.BuildConfig;
97 import com.stoutner.privacybrowser.R;
98 import com.stoutner.privacybrowser.dialogs.CreateHomeScreenShortcutDialog;
99 import com.stoutner.privacybrowser.dialogs.DownloadImageDialog;
100 import com.stoutner.privacybrowser.dialogs.UrlHistoryDialog;
101 import com.stoutner.privacybrowser.dialogs.ViewSslCertificateDialog;
102 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
103 import com.stoutner.privacybrowser.helpers.OrbotProxyHelper;
104 import com.stoutner.privacybrowser.dialogs.DownloadFileDialog;
105 import com.stoutner.privacybrowser.dialogs.SslCertificateErrorDialog;
106
107 import java.io.BufferedReader;
108 import java.io.ByteArrayInputStream;
109 import java.io.IOException;
110 import java.io.InputStreamReader;
111 import java.io.UnsupportedEncodingException;
112 import java.net.MalformedURLException;
113 import java.net.URL;
114 import java.net.URLDecoder;
115 import java.net.URLEncoder;
116 import java.util.HashMap;
117 import java.util.HashSet;
118 import java.util.Map;
119 import java.util.Set;
120
121 // We need to use AppCompatActivity from android.support.v7.app.AppCompatActivity to have access to the SupportActionBar until the minimum API is >= 21.
122 public class MainWebViewActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener, CreateHomeScreenShortcutDialog.CreateHomeScreenSchortcutListener,
123         SslCertificateErrorDialog.SslCertificateErrorListener, DownloadFileDialog.DownloadFileListener, DownloadImageDialog.DownloadImageListener, UrlHistoryDialog.UrlHistoryListener {
124
125     // `favoriteIconBitmap` is public static so it can be accessed from `CreateHomeScreenShortcutDialog`, `BookmarksActivity`, `CreateBookmarkDialog`, `CreateBookmarkFolderDialog`, `EditBookmarkDialog`, `EditBookmarkFolderDialog`, `ViewSslCertificateDialog`.
126     // It is also used in `onCreate()`, `onCreateHomeScreenShortcutCreate()`, and `applyDomainSettings`.
127     public static Bitmap favoriteIconBitmap;
128
129     // `formattedUrlString` is public static so it can be accessed from `BookmarksActivity`, `CreateBookmarkDialog`, and `AddDomainDialog`.
130     // It is also used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onCreateHomeScreenShortcutCreate()`, and `loadUrlFromTextBox()`.
131     public static String formattedUrlString;
132
133     // `sslCertificate` is public static so it can be accessed from `ViewSslCertificateDialog`.  It is also used in `onCreate()`.
134     public static SslCertificate sslCertificate;
135
136     // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()`.
137     public static String orbotStatus;
138
139     // `webViewTitle` is public static so it can be accessed from `CreateBookmarkDialog` and `CreateHomeScreenShortcutDialog`.  It is also used in `onCreate()`.
140     public static String webViewTitle;
141
142     // `displayWebpageImagesBoolean` is public static so it can be accessed from `DomainSettingsFragment`.  It is also used in `applyAppSettings()` and `applyDomainSettings()`.
143     public static boolean displayWebpageImagesBoolean;
144
145     // `reloadOnRestartBoolean` is public static so it can be accessed from `SettingsFragment`.  It is also used in `onRestart()`
146     public static boolean reloadOnRestartBoolean;
147
148
149     // `appBar` is used in `onCreate()`, `onOptionsItemSelected()`, `closeFindOnPage()`, and `applyAppSettings()`.
150     private ActionBar appBar;
151
152     // `navigatingHistory` is used in `onCreate()`, `onNavigationItemSelected()`, and `applyDomainSettings()`.
153     private boolean navigatingHistory;
154
155     // `favoriteIconDefaultBitmap` is used in `onCreate()` and `applyDomainSettings`.
156     private Bitmap favoriteIconDefaultBitmap;
157
158     // `drawerLayout` is used in `onCreate()`, `onNewIntent()`, and `onBackPressed()`.
159     private DrawerLayout drawerLayout;
160
161     // `rootCoordinatorLayout` is used in `onCreate()` and `applyAppSettings()`.
162     private CoordinatorLayout rootCoordinatorLayout;
163
164     // `mainWebView` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`, `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`
165     // and `setDisplayWebpageImages()`.
166     private WebView mainWebView;
167
168     // `fullScreenVideoFrameLayout` is used in `onCreate()` and `onConfigurationChanged()`.
169     private FrameLayout fullScreenVideoFrameLayout;
170
171     // `swipeRefreshLayout` is used in `onCreate()`, `onPrepareOptionsMenu`, and `onRestart()`.
172     private SwipeRefreshLayout swipeRefreshLayout;
173
174     // `urlAppBarRelativeLayout` is used in `onCreate()` and `applyDomainSettings()`.
175     private RelativeLayout urlAppBarRelativeLayout;
176
177     // `favoriteIconImageView` is used in `onCreate()` and `applyDomainSettings()`
178     private ImageView favoriteIconImageView;
179
180     // `cookieManager` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`, `loadUrlFromTextBox()`, `onDownloadImage()`, `onDownloadFile()`, and `onRestart()`.
181     private CookieManager cookieManager;
182
183     // `customHeader` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateContextMenu()`, and `loadUrl()`.
184     private final Map<String, String> customHeaders = new HashMap<>();
185
186     // `javaScriptEnabled` is also used in `onCreate()`, `onCreateOptionsMenu()`, `onOptionsItemSelected()`, `loadUrlFromTextBox()`, and `applyAppSettings()`.
187     // It is `Boolean` instead of `boolean` because `applyAppSettings()` needs to know if it is `null`.
188     private Boolean javaScriptEnabled;
189
190     // `firstPartyCookiesEnabled` is used in `onCreate()`, `onCreateOptionsMenu()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onDownloadImage()`, `onDownloadFile()`, and `applyAppSettings()`.
191     private boolean firstPartyCookiesEnabled;
192
193     // `thirdPartyCookiesEnabled` used in `onCreate()`, `onCreateOptionsMenu()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
194     private boolean thirdPartyCookiesEnabled;
195
196     // `domStorageEnabled` is used in `onCreate()`, `onCreateOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
197     private boolean domStorageEnabled;
198
199     // `saveFormDataEnabled` is used in `onCreate()`, `onCreateOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
200     private boolean saveFormDataEnabled;
201
202     // `swipeToRefreshEnabled` is used in `onPrepareOptionsMenu()` and `applyAppSettings()`.
203     private boolean swipeToRefreshEnabled;
204
205     // 'homepage' is used in `onCreate()`, `onNavigationItemSelected()`, and `applyAppSettings()`.
206     private String homepage;
207
208     // `searchURL` is used in `loadURLFromTextBox()` and `applyAppSettings()`.
209     private String searchURL;
210
211     // `adBlockerEnabled` is used in `onCreate()` and `applyAppSettings()`.
212     private boolean adBlockerEnabled;
213
214     // `privacyBrowserRuntime` is used in `onCreate()` and `applyAppSettings()`.
215     private Runtime privacyBrowserRuntime;
216
217     // `incognitoModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
218     private boolean incognitoModeEnabled;
219
220     // `fullScreenBrowsingModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
221     private boolean fullScreenBrowsingModeEnabled;
222
223     // `inFullScreenBrowsingMode` is used in `onCreate()`, `onConfigurationChanged()`, and `applyAppSettings()`.
224     private boolean inFullScreenBrowsingMode;
225
226     // `hideSystemBarsOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
227     private boolean hideSystemBarsOnFullscreen;
228
229     // `translucentNavigationBarOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
230     private boolean translucentNavigationBarOnFullscreen;
231
232     // `currentDomainName` is used in `onCreate()`, `onNavigationItemSelected()`, and `applyDomainSettings()`.
233     private String currentDomainName;
234
235     // `waitingForOrbot` is used in `onCreate()` and `applyAppSettings()`.
236     private boolean waitingForOrbot;
237
238     // `domainSettingsApplied` is used in `applyDomainSettings()` and `setDisplayWebpageImages()`.
239     private boolean domainSettingsApplied;
240
241     // `displayWebpageImagesInt` is used in `applyDomainSettings()` and `setDisplayWebpageImages()`.
242     private int displayWebpageImagesInt;
243
244     // `onTheFlyDisplayImagesSet` is used in `applyDomainSettings()` and `setDisplayWebpageImages()`.
245     private boolean onTheFlyDisplayImagesSet;
246
247     // `waitingForOrbotData` is used in `onCreate()` and `applyAppSettings()`.
248     private String waitingForOrbotHTMLString;
249
250     // `privateDataDirectoryString` is used in `onCreate()` and `onNavigationItemSelected()`.
251     private String privateDataDirectoryString;
252
253     // `findOnPageLinearLayout` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
254     private LinearLayout findOnPageLinearLayout;
255
256     // `findOnPageEditText` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
257     private EditText findOnPageEditText;
258
259     // `mainMenu` is used in `onCreateOptionsMenu()` and `updatePrivacyIcons()`.
260     private Menu mainMenu;
261
262     // `drawerToggle` is used in `onCreate()`, `onPostCreate()`, `onConfigurationChanged()`, `onNewIntent()`, and `onNavigationItemSelected()`.
263     private ActionBarDrawerToggle drawerToggle;
264
265     // `supportAppBar` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
266     private Toolbar supportAppBar;
267
268     // `urlTextBox` is used in `onCreate()`, `onOptionsItemSelected()`, `loadUrlFromTextBox()`, `loadUrl()`, and `highlightUrlText()`.
269     private EditText urlTextBox;
270
271     // `redColorSpan` is used in `onCreate()` and `highlightUrlText()`.
272     private ForegroundColorSpan redColorSpan;
273
274     // `initialGrayColorSpan` is sued in `onCreate()` and `highlightUrlText()`.
275     private ForegroundColorSpan initialGrayColorSpan;
276
277     // `finalGrayColorSpam` is used in `onCreate()` and `highlightUrlText()`.
278     private ForegroundColorSpan finalGrayColorSpan;
279
280     // `boldStyleSpan` is used in `onCreate()` and `highlightUrlText()`.
281     private StyleSpan boldStyleSpan;
282
283     // `adView` is used in `onCreate()` and `onConfigurationChanged()`.
284     private View adView;
285
286     // `sslErrorHandler` is used in `onCreate()`, `onSslErrorCancel()`, and `onSslErrorProceed`.
287     private SslErrorHandler sslErrorHandler;
288
289     // `inputMethodManager` is used in `onOptionsItemSelected()`, `loadUrlFromTextBox()`, and `closeFindOnPage()`.
290     private InputMethodManager inputMethodManager;
291
292     // `mainWebViewRelativeLayout` is used in `onCreate()` and `onNavigationItemSelected()`.
293     private RelativeLayout mainWebViewRelativeLayout;
294
295     // `darkTheme` is used in `onCreate()`, `applyAppSettings()`, and `applyDomainSettings()`.
296     private boolean darkTheme;
297
298     @Override
299     // 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.
300     @SuppressLint("SetJavaScriptEnabled")
301     // Remove Android Studio's warning about deprecations.  We have to use the deprecated `getColor()` until API >= 23.
302     @SuppressWarnings("deprecation")
303     protected void onCreate(Bundle savedInstanceState) {
304         // Get a handle for `sharedPreferences`.  `this` references the current context.
305         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
306
307         // Get the theme preference.
308         darkTheme = sharedPreferences.getBoolean("dark_theme", false);
309
310         // Set the activity theme.
311         if (darkTheme) {
312             setTheme(R.style.PrivacyBrowserDark);
313         } else {
314             setTheme(R.style.PrivacyBrowserLight);
315         }
316
317         // Run the default commands.
318         super.onCreate(savedInstanceState);
319
320         // Set the content view according to the theme..
321         if (darkTheme) {
322             setContentView(R.layout.main_drawerlayout_dark);
323         } else {
324             setContentView(R.layout.main_drawerlayout_light);
325         }
326
327         // Get a handle for `inputMethodManager`.
328         inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
329
330         // We need to use the `SupportActionBar` from `android.support.v7.app.ActionBar` until the minimum API is >= 21.
331         supportAppBar = (Toolbar) findViewById(R.id.app_bar);
332         setSupportActionBar(supportAppBar);
333         appBar = getSupportActionBar();
334
335         // This is needed to get rid of the Android Studio warning that `appBar` might be null.
336         assert appBar != null;
337
338         // Add the custom `url_app_bar` layout, which shows the favorite icon and the URL text bar.
339         appBar.setCustomView(R.layout.url_app_bar);
340         appBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
341
342         // Initialize the `ForegroundColorSpans` and `StyleSpan` for highlighting `urlTextBox`.  We have to use the deprecated `getColor()` until API >= 23.
343         redColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.red_a700));
344         initialGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
345         finalGrayColorSpan = new ForegroundColorSpan(getResources().getColor(R.color.gray_500));
346         boldStyleSpan = new StyleSpan(Typeface.BOLD);
347
348         // Get a handle for `urlTextBox`.
349         urlTextBox = (EditText) appBar.getCustomView().findViewById(R.id.url_edittext);
350
351         // Remove the formatting from `urlTextBar` when the user is editing the text.
352         urlTextBox.setOnFocusChangeListener(new View.OnFocusChangeListener() {
353             @Override
354             public void onFocusChange(View v, boolean hasFocus) {
355                 if (hasFocus) {  // The user is editing `urlTextBox`.
356                     // Remove the highlighting.
357                     urlTextBox.getText().removeSpan(redColorSpan);
358                     urlTextBox.getText().removeSpan(initialGrayColorSpan);
359                     urlTextBox.getText().removeSpan(finalGrayColorSpan);
360                     urlTextBox.getText().removeSpan(boldStyleSpan);
361                 } else {  // The user has stopped editing `urlTextBox`.
362                     // Reapply the highlighting.
363                     highlightUrlText();
364
365                     // Scroll to the beginning of the text.
366                     urlTextBox.setScrollX(0);
367                 }
368             }
369         });
370
371         // Set the `Go` button on the keyboard to load the URL in `urlTextBox`.
372         urlTextBox.setOnKeyListener(new View.OnKeyListener() {
373             @Override
374             public boolean onKey(View v, int keyCode, KeyEvent event) {
375                 // If the event is a key-down event on the `enter` button, load the URL.
376                 if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {
377                     // Load the URL into the mainWebView and consume the event.
378                     try {
379                         loadUrlFromTextBox();
380                     } catch (UnsupportedEncodingException e) {
381                         e.printStackTrace();
382                     }
383                     // If the enter key was pressed, consume the event.
384                     return true;
385                 } else {
386                     // If any other key was pressed, do not consume the event.
387                     return false;
388                 }
389             }
390         });
391
392         // Set `waitingForOrbotHTMLString`.
393         waitingForOrbotHTMLString = "<html><body><br/><center><h1>" + getString(R.string.waiting_for_orbot) + "</h1></center></body></html>";
394
395         // Initialize `currentDomainName`, `orbotStatus`, and `waitingForOrbot`.
396         currentDomainName = "";
397         orbotStatus = "unknown";
398         waitingForOrbot = false;
399
400         // Create an Orbot status `BroadcastReceiver`.
401         BroadcastReceiver orbotStatusBroadcastReceiver = new BroadcastReceiver() {
402             @Override
403             public void onReceive(Context context, Intent intent) {
404                 // Store the content of the status message in `orbotStatus`.
405                 orbotStatus = intent.getStringExtra("org.torproject.android.intent.extra.STATUS");
406
407                 // If we are waiting on Orbot, load the website now that Orbot is connected.
408                 if (orbotStatus.equals("ON") && waitingForOrbot) {
409                     // Reset `waitingForOrbot`.
410                     waitingForOrbot = false;
411
412                     // Load `formattedUrlString
413                     loadUrl(formattedUrlString);
414                 }
415             }
416         };
417
418         // Register `orbotStatusBroadcastReceiver` on `this` context.
419         this.registerReceiver(orbotStatusBroadcastReceiver, new IntentFilter("org.torproject.android.intent.action.STATUS"));
420
421         // Get handles for views that need to be accessed.
422         drawerLayout = (DrawerLayout) findViewById(R.id.drawerlayout);
423         rootCoordinatorLayout = (CoordinatorLayout) findViewById(R.id.root_coordinatorlayout);
424         mainWebViewRelativeLayout = (RelativeLayout) findViewById(R.id.main_webview_relativelayout);
425         mainWebView = (WebView) findViewById(R.id.main_webview);
426         findOnPageLinearLayout = (LinearLayout) findViewById(R.id.find_on_page_linearlayout);
427         findOnPageEditText = (EditText) findViewById(R.id.find_on_page_edittext);
428         fullScreenVideoFrameLayout = (FrameLayout) findViewById(R.id.full_screen_video_framelayout);
429         urlAppBarRelativeLayout = (RelativeLayout) findViewById(R.id.url_app_bar_relativelayout);
430         favoriteIconImageView = (ImageView) findViewById(R.id.favorite_icon);
431
432         // Create a double-tap listener to toggle full-screen mode.
433         final GestureDetector gestureDetector = new GestureDetector(this, new GestureDetector.SimpleOnGestureListener() {
434             // Override `onDoubleTap()`.  All other events are handled using the default settings.
435             @Override
436             public boolean onDoubleTap(MotionEvent event) {
437                 if (fullScreenBrowsingModeEnabled) {  // Only process the double-tap if full screen browsing mode is enabled.
438                     // Toggle `inFullScreenBrowsingMode`.
439                     inFullScreenBrowsingMode = !inFullScreenBrowsingMode;
440
441                     if (inFullScreenBrowsingMode) {  // Switch to full screen mode.
442                         // Hide the `appBar`.
443                         appBar.hide();
444
445                         // Hide the `BannerAd` in the free flavor.
446                         if (BuildConfig.FLAVOR.contentEquals("free")) {
447                             BannerAd.hideAd(adView);
448                         }
449
450                         // Modify the system bars.
451                         if (hideSystemBarsOnFullscreen) {  // Hide everything.
452                             // Remove the translucent overlays.
453                             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
454
455                             // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
456                             drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
457
458                             /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
459                              * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
460                              * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically rehides them after they are shown.
461                              */
462                             rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
463
464                             // Set `rootCoordinatorLayout` to fill the whole screen.
465                             rootCoordinatorLayout.setFitsSystemWindows(false);
466                         } else {  // Hide everything except the status and navigation bars.
467                             // Set `rootCoordinatorLayout` to fit under the status and navigation bars.
468                             rootCoordinatorLayout.setFitsSystemWindows(false);
469
470                             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.
471                                 // Set the navigation bar to be translucent.
472                                 getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
473                             }
474                         }
475                     } else {  // Switch to normal viewing mode.
476                         // Show the `appBar`.
477                         appBar.show();
478
479                         // Show the `BannerAd` in the free flavor.
480                         if (BuildConfig.FLAVOR.contentEquals("free")) {
481                             // Reload the ad.  Because the screen may have rotated, we need to use `reloadAfterRotate`.
482                             BannerAd.reloadAfterRotate(adView, getApplicationContext(), getString(R.string.ad_id));
483
484                             // Reinitialize the `adView` variable, as the `View` will have been removed and re-added by `BannerAd.reloadAfterRotate()`.
485                             adView = findViewById(R.id.adview);
486                         }
487
488                         // Remove the translucent navigation bar flag if it is set.
489                         getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
490
491                         // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
492                         getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
493
494                         // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
495                         rootCoordinatorLayout.setSystemUiVisibility(0);
496
497                         // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
498                         rootCoordinatorLayout.setFitsSystemWindows(true);
499                     }
500
501                     // Consume the double-tap.
502                     return true;
503                 } else { // Do not consume the double-tap because full screen browsing mode is disabled.
504                     return false;
505                 }
506             }
507         });
508
509         // Pass all touch events on `mainWebView` through `gestureDetector` to check for double-taps.
510         mainWebView.setOnTouchListener(new View.OnTouchListener() {
511             @Override
512             public boolean onTouch(View v, MotionEvent event) {
513                 // Send the `event` to `gestureDetector`.
514                 return gestureDetector.onTouchEvent(event);
515             }
516         });
517
518         // Update `findOnPageCountTextView`.
519         mainWebView.setFindListener(new WebView.FindListener() {
520             // Get a handle for `findOnPageCountTextView`.
521             final TextView findOnPageCountTextView = (TextView) findViewById(R.id.find_on_page_count_textview);
522
523             @Override
524             public void onFindResultReceived(int activeMatchOrdinal, int numberOfMatches, boolean isDoneCounting) {
525                 if ((isDoneCounting) && (numberOfMatches == 0)) {  // There are no matches.
526                     // Set `findOnPageCountTextView` to `0/0`.
527                     findOnPageCountTextView.setText(R.string.zero_of_zero);
528                 } else if (isDoneCounting) {  // There are matches.
529                     // `activeMatchOrdinal` is zero-based.
530                     int activeMatch = activeMatchOrdinal + 1;
531
532                     // Set `findOnPageCountTextView`.
533                     findOnPageCountTextView.setText(activeMatch + "/" + numberOfMatches);
534                 }
535             }
536         });
537
538         // Search for the string on the page whenever a character changes in the `findOnPageEditText`.
539         findOnPageEditText.addTextChangedListener(new TextWatcher() {
540             @Override
541             public void beforeTextChanged(CharSequence s, int start, int count, int after) {
542                 // Do nothing.
543             }
544
545             @Override
546             public void onTextChanged(CharSequence s, int start, int before, int count) {
547                 // Do nothing.
548             }
549
550             @Override
551             public void afterTextChanged(Editable s) {
552                 // Search for the text in `mainWebView`.
553                 mainWebView.findAllAsync(findOnPageEditText.getText().toString());
554             }
555         });
556
557         // Set the `check mark` button for the `findOnPageEditText` keyboard to close the soft keyboard.
558         findOnPageEditText.setOnKeyListener(new View.OnKeyListener() {
559             @Override
560             public boolean onKey(View v, int keyCode, KeyEvent event) {
561                 if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER)) {  // The `enter` key was pressed.
562                     // Hide the soft keyboard.  `0` indicates no additional flags.
563                     inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
564
565                     // Consume the event.
566                     return true;
567                 } else {  // A different key was pressed.
568                     // Do not consume the event.
569                     return false;
570                 }
571             }
572         });
573
574         // Implement swipe to refresh
575         swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_refreshlayout);
576         swipeRefreshLayout.setColorSchemeResources(R.color.blue_700);
577         swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
578             @Override
579             public void onRefresh() {
580                 mainWebView.reload();
581             }
582         });
583
584         // `DrawerTitle` identifies the `DrawerLayout` in accessibility mode.
585         drawerLayout.setDrawerTitle(GravityCompat.START, getString(R.string.navigation_drawer));
586
587         // Listen for touches on the navigation menu.
588         final NavigationView navigationView = (NavigationView) findViewById(R.id.navigationview);
589         navigationView.setNavigationItemSelectedListener(this);
590
591         // 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.
592         final Menu navigationMenu = navigationView.getMenu();
593         final MenuItem navigationBackMenuItem = navigationMenu.getItem(1);
594         final MenuItem navigationForwardMenuItem = navigationMenu.getItem(2);
595         final MenuItem navigationHistoryMenuItem = navigationMenu.getItem(3);
596
597         // The `DrawerListener` allows us to update the Navigation Menu.
598         drawerLayout.addDrawerListener(new DrawerLayout.DrawerListener() {
599             @Override
600             public void onDrawerSlide(View drawerView, float slideOffset) {
601             }
602
603             @Override
604             public void onDrawerOpened(View drawerView) {
605             }
606
607             @Override
608             public void onDrawerClosed(View drawerView) {
609             }
610
611             @Override
612             public void onDrawerStateChanged(int newState) {
613                 if ((newState == DrawerLayout.STATE_SETTLING) || (newState == DrawerLayout.STATE_DRAGGING)) {  // The drawer is opening or closing.
614                     // Update the `Back`, `Forward`, and `History` menu items.
615                     navigationBackMenuItem.setEnabled(mainWebView.canGoBack());
616                     navigationForwardMenuItem.setEnabled(mainWebView.canGoForward());
617                     navigationHistoryMenuItem.setEnabled((mainWebView.canGoBack() || mainWebView.canGoForward()));
618
619                     // Hide the keyboard (if displayed) so we can see the navigation menu.  `0` indicates no additional flags.
620                     inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
621
622                     // Clear the focus from `urlTextBox` if it has it.
623                     urlTextBox.clearFocus();
624                 }
625             }
626         });
627
628         // drawerToggle creates the hamburger icon at the start of the AppBar.
629         drawerToggle = new ActionBarDrawerToggle(this, drawerLayout, supportAppBar, R.string.open_navigation_drawer, R.string.close_navigation_drawer);
630
631         // Initialize `adServerSet`.
632         final Set<String> adServersSet = new HashSet<>();
633
634         // Load the list of ad servers into memory.
635         try {
636             // Load `pgl.yoyo.org_adservers.txt` into a `BufferedReader`.
637             BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(getAssets().open("pgl.yoyo.org_adservers.txt")));
638
639             // Create a string for storing each ad server.
640             String adServer;
641
642             // Populate `adServersSet`.
643             while ((adServer = bufferedReader.readLine()) != null) {
644                 adServersSet.add(adServer);
645             }
646
647             // Close `bufferedReader`.
648             bufferedReader.close();
649         } catch (IOException ioException) {
650             // We're pretty sure the asset exists, so we don't need to worry about the `IOException` ever being thrown.
651         }
652
653         mainWebView.setWebViewClient(new WebViewClient() {
654             // `shouldOverrideUrlLoading` makes this `WebView` the default handler for URLs inside the app, so that links are not kicked out to other apps.
655             // We have to use the deprecated `shouldOverrideUrlLoading` until API >= 24.
656             @SuppressWarnings("deprecation")
657             @Override
658             public boolean shouldOverrideUrlLoading(WebView view, String url) {
659                 if (url.startsWith("mailto:")) {  // Load the URL in an external email program because it begins with `mailto:`.
660                     // We use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
661                     Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
662
663                     // Parse the url and set it as the data for the `Intent`.
664                     emailIntent.setData(Uri.parse(url));
665
666                     // `FLAG_ACTIVITY_NEW_TASK` opens the email program in a new task instead as part of Privacy Browser.
667                     emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
668
669                     // Make it so.
670                     startActivity(emailIntent);
671
672                     // Returning `true` indicates the application is handling the URL.
673                     return true;
674                 } else {  // Load the URL in Privacy Browser.
675                     // Apply the domain settings for the new URL.
676                     applyDomainSettings(url);
677
678                     // Returning `false` causes the current `WebView` to handle the URL and prevents it from adding redirects to the history list.
679                     return false;
680                 }
681             }
682
683             // Block ads.  We have to use the deprecated `shouldInterceptRequest` until minimum API >= 21.
684             @SuppressWarnings("deprecation")
685             @Override
686             public WebResourceResponse shouldInterceptRequest(WebView view, String url){
687                 if (adBlockerEnabled) {  // Block ads.
688                     // Extract the host from `url`.
689                     Uri requestUri = Uri.parse(url);
690                     String requestHost = requestUri.getHost();
691
692                     // Initialize a variable to track if this is an ad server.
693                     boolean requestHostIsAdServer = false;
694
695                     // Check all the subdomains of `requestHost` if it is not `null` against the ad server database.
696                     if (requestHost != null) {
697                         while (requestHost.contains(".") && !requestHostIsAdServer) {  // Stop checking if we run out of `.` or if we already know that `requestHostIsAdServer` is `true`.
698                             if (adServersSet.contains(requestHost)) {
699                                 requestHostIsAdServer = true;
700                             }
701
702                             // Strip out the lowest subdomain of `requestHost`.
703                             requestHost = requestHost.substring(requestHost.indexOf(".") + 1);
704                         }
705                     }
706
707                     if (requestHostIsAdServer) {  // It is an ad server.
708                         // Return an empty `WebResourceResponse`.
709                         return new WebResourceResponse("text/plain", "utf8", new ByteArrayInputStream("".getBytes()));
710                     } else {  // It is not an ad server.
711                         // `return null` loads the requested resource.
712                         return null;
713                     }
714                 } else {  // Ad blocking is disabled.
715                     // `return null` loads the requested resource.
716                     return null;
717                 }
718             }
719
720             // Update the URL in urlTextBox when the page starts to load.
721             @Override
722             public void onPageStarted(WebView view, String url, Bitmap favicon) {
723                 // Reset `webViewTitle`
724                 webViewTitle = getString(R.string.no_title);
725
726                 // Check to see if we are waiting on Orbot.
727                 if (!waitingForOrbot) {  // We are not waiting on Orbot, so we need to process the URL.
728                     // 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.
729                     formattedUrlString = url;
730
731                     // Display the formatted URL text.
732                     urlTextBox.setText(formattedUrlString);
733
734                     // Apply text highlighting to `urlTextBox`.
735                     highlightUrlText();
736
737                     // Apply any custom domain settings if the URL was loaded by navigating history.
738                     if (navigatingHistory) {
739                         applyDomainSettings(url);
740                     }
741                 }
742             }
743
744             // Update formattedUrlString and urlTextBox.  It is necessary to do this after the page finishes loading because the final URL can change during load.
745             @Override
746             public void onPageFinished(WebView view, String url) {
747                 // Clear the cache and history if Incognito Mode is enabled.
748                 if (incognitoModeEnabled) {
749                     // Clear the cache.  `true` includes disk files.
750                     mainWebView.clearCache(true);
751
752                     // Clear the back/forward history.
753                     mainWebView.clearHistory();
754
755                     // Manually delete cache folders.
756                     try {
757                         // Delete the main `cache` folder.
758                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
759
760                         // 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`.
761                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview");
762                     } catch (IOException e) {
763                         // Do nothing if an error is thrown.
764                     }
765                 }
766
767                 // Update `urlTextBox` and apply domain settings if not waiting on Orbot.
768                 if (!waitingForOrbot) {
769                     // Check to see if `WebView` has set `url` to be `about:blank`.
770                     if (url.equals("about:blank")) {  // `WebView` is blank, so `formattedUrlString` should be `""` and `urlTextBox` should display a hint.
771                         // Set `formattedUrlString` to `""`.
772                         formattedUrlString = "";
773
774                         urlTextBox.setText(formattedUrlString);
775
776                         // Request focus for `urlTextBox`.
777                         urlTextBox.requestFocus();
778
779                         // Display the keyboard.
780                         inputMethodManager.showSoftInput(urlTextBox, 0);
781
782                         // Apply the domain settings.  This clears any settings from the previous domain.
783                         applyDomainSettings(formattedUrlString);
784                     } else {  // `WebView` has loaded a webpage.
785                         // Set `formattedUrlString`.
786                         formattedUrlString = url;
787
788                         // Only update `urlTextBox` if the user is not typing in it.
789                         if (!urlTextBox.hasFocus()) {
790                             // Display the formatted URL text.
791                             urlTextBox.setText(formattedUrlString);
792
793                             // Apply text highlighting to `urlTextBox`.
794                             highlightUrlText();
795                         }
796                     }
797
798                     // Store the SSL certificate so it can be accessed from `ViewSslCertificateDialog`.
799                     sslCertificate = mainWebView.getCertificate();
800                 }
801             }
802
803             // Handle SSL Certificate errors.
804             @Override
805             public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {
806                 // Store `handler` so it can be accesses from `onSslErrorCancel()` and `onSslErrorProceed()`.
807                 sslErrorHandler = handler;
808
809                 // Display the SSL error `AlertDialog`.
810                 AppCompatDialogFragment sslCertificateErrorDialogFragment = SslCertificateErrorDialog.displayDialog(error);
811                 sslCertificateErrorDialogFragment.show(getSupportFragmentManager(), getResources().getString(R.string.ssl_certificate_error));
812             }
813         });
814
815         // Get a handle for the progress bar.
816         final ProgressBar progressBar = (ProgressBar) findViewById(R.id.progress_bar);
817
818         mainWebView.setWebChromeClient(new WebChromeClient() {
819             // Update the progress bar when a page is loading.
820             @Override
821             public void onProgressChanged(WebView view, int progress) {
822                 progressBar.setProgress(progress);
823                 if (progress < 100) {
824                     progressBar.setVisibility(View.VISIBLE);
825                 } else {
826                     progressBar.setVisibility(View.GONE);
827
828                     //Stop the `SwipeToRefresh` indicator if it is running
829                     swipeRefreshLayout.setRefreshing(false);
830                 }
831             }
832
833             // Set the favorite icon when it changes.
834             @Override
835             public void onReceivedIcon(WebView view, Bitmap icon) {
836                 // Only update the favorite icon if the website has finished loading.
837                 if (progressBar.getVisibility() == View.GONE) {
838                     // Save a copy of the favorite icon.
839                     favoriteIconBitmap = icon;
840
841                     // Place the favorite icon in the appBar.
842                     favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(icon, 64, 64, true));
843                 }
844             }
845
846             // Save a copy of the title when it changes.
847             @Override
848             public void onReceivedTitle(WebView view, String title) {
849                 // Save a copy of the title.
850                 webViewTitle = title;
851             }
852
853             // Enter full screen video
854             @Override
855             public void onShowCustomView(View view, CustomViewCallback callback) {
856                 // Pause the ad if this is the free flavor.
857                 if (BuildConfig.FLAVOR.contentEquals("free")) {
858                     BannerAd.pauseAd(adView);
859                 }
860
861                 // Remove the translucent overlays.
862                 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
863
864                 // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
865                 drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
866
867                 /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
868                  * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
869                  * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically rehides them after they are shown.
870                  */
871                 rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
872
873                 // Set `rootCoordinatorLayout` to fill the entire screen.
874                 rootCoordinatorLayout.setFitsSystemWindows(false);
875
876                 // Add `view` to `fullScreenVideoFrameLayout` and display it on the screen.
877                 fullScreenVideoFrameLayout.addView(view);
878                 fullScreenVideoFrameLayout.setVisibility(View.VISIBLE);
879             }
880
881             // Exit full screen video
882             public void onHideCustomView() {
883                 // Hide `fullScreenVideoFrameLayout`.
884                 fullScreenVideoFrameLayout.removeAllViews();
885                 fullScreenVideoFrameLayout.setVisibility(View.GONE);
886
887                 // Add the translucent status flag.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
888                 getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
889
890                 // Set `rootCoordinatorLayout` to fit inside the status and navigation bars.  This also clears the `SYSTEM_UI` flags.
891                 rootCoordinatorLayout.setFitsSystemWindows(true);
892
893                 // Show the ad if this is the free flavor.
894                 if (BuildConfig.FLAVOR.contentEquals("free")) {
895                     // Reload the ad.  Because the screen may have rotated, we need to use `reloadAfterRotate`.
896                     BannerAd.reloadAfterRotate(adView, getApplicationContext(), getString(R.string.ad_id));
897
898                     // Reinitialize the `adView` variable, as the `View` will have been removed and re-added by `BannerAd.reloadAfterRotate()`.
899                     adView = findViewById(R.id.adview);
900                 }
901             }
902         });
903
904         // Register `mainWebView` for a context menu.  This is used to see link targets and download images.
905         registerForContextMenu(mainWebView);
906
907         // Allow the downloading of files.
908         mainWebView.setDownloadListener(new DownloadListener() {
909             @Override
910             public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
911                 // Show the `DownloadFileDialog` `AlertDialog` and name this instance `@string/download`.
912                 AppCompatDialogFragment downloadFileDialogFragment = DownloadFileDialog.fromUrl(url, contentDisposition, contentLength);
913                 downloadFileDialogFragment.show(getSupportFragmentManager(), getResources().getString(R.string.download));
914             }
915         });
916
917         // Allow pinch to zoom.
918         mainWebView.getSettings().setBuiltInZoomControls(true);
919
920         // Hide zoom controls.
921         mainWebView.getSettings().setDisplayZoomControls(false);
922
923         // Set `mainWebView` to use a wide viewport.  Otherwise, some web pages will be scrunched and some content will render outside the screen.
924         mainWebView.getSettings().setUseWideViewPort(true);
925
926         // Set `mainWebView` to load in overview mode (zoomed out to the maximum width).
927         mainWebView.getSettings().setLoadWithOverviewMode(true);
928
929         // Initialize cookieManager.
930         cookieManager = CookieManager.getInstance();
931
932         // 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).
933         customHeaders.put("X-Requested-With", "");
934
935         // 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.
936         PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
937
938         // Get the intent that started the app.
939         final Intent launchingIntent = getIntent();
940
941         // Extract the launching intent data as `launchingIntentUriData`.
942         final Uri launchingIntentUriData = launchingIntent.getData();
943
944         // Convert the launching intent URI data (if it exists) to a string and store it in `formattedUrlString`.
945         if (launchingIntentUriData != null) {
946             formattedUrlString = launchingIntentUriData.toString();
947         }
948
949         // Get a handle for the `Runtime`.
950         privacyBrowserRuntime = Runtime.getRuntime();
951
952         // Store the application's private data directory.
953         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`.
954
955         // Initialize `inFullScreenBrowsingMode`, which is always false at this point because Privacy Browser never starts in full screen browsing mode.
956         inFullScreenBrowsingMode = false;
957
958         // Initialize AdView for the free flavor.
959         adView = findViewById(R.id.adview);
960
961         // Initialize the privacy settings variables.
962         javaScriptEnabled = false;
963         firstPartyCookiesEnabled = false;
964         thirdPartyCookiesEnabled = false;
965         domStorageEnabled = false;
966         saveFormDataEnabled = false;
967
968         // Initialize `webViewTitle`.
969         webViewTitle = getString(R.string.no_title);
970
971         // Initialize `favoriteIconBitmap`.  We have to use `ContextCompat` until API >= 21.
972         Drawable favoriteIconDrawable = ContextCompat.getDrawable(getApplicationContext(), R.drawable.world);
973         BitmapDrawable favoriteIconBitmapDrawable = (BitmapDrawable) favoriteIconDrawable;
974         favoriteIconDefaultBitmap = favoriteIconBitmapDrawable.getBitmap();
975
976         // If the favorite icon is null, load the default.
977         if (favoriteIconBitmap == null) {
978             favoriteIconBitmap = favoriteIconDefaultBitmap;
979         }
980
981         // Apply the app settings from the shared preferences.
982         applyAppSettings();
983
984         // Load `formattedUrlString` if we are not waiting for Orbot to connect.
985         if (!waitingForOrbot) {
986             loadUrl(formattedUrlString);
987         }
988     }
989
990     @Override
991     protected void onNewIntent(Intent intent) {
992         // Sets the new intent as the activity intent, so that any future `getIntent()`s pick up this one instead of creating a new activity.
993         setIntent(intent);
994
995         if (intent.getData() != null) {
996             // Get the intent data and convert it to a string.
997             final Uri intentUriData = intent.getData();
998             formattedUrlString = intentUriData.toString();
999         }
1000
1001         // Close the navigation drawer if it is open.
1002         if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
1003             drawerLayout.closeDrawer(GravityCompat.START);
1004         }
1005
1006         // Load the website.
1007         loadUrl(formattedUrlString);
1008
1009         // Clear the keyboard if displayed and remove the focus on the urlTextBar if it has it.
1010         mainWebView.requestFocus();
1011     }
1012
1013     @Override
1014     public void onRestart() {
1015         super.onRestart();
1016
1017         // Apply the app settings, which may have been changed in `SettingsActivity`.
1018         applyAppSettings();
1019
1020         // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1021         updatePrivacyIcons(true);
1022
1023         // Set the display webpage images mode.
1024         setDisplayWebpageImages();
1025
1026         // Reload the webpage if displaying of images has been disabled in `SettingsFragment`.
1027         if (reloadOnRestartBoolean) {
1028             // Reload `mainWebView`.
1029             mainWebView.reload();
1030
1031             // Reset `reloadOnRestartBoolean`.
1032             reloadOnRestartBoolean = false;
1033         }
1034     }
1035
1036     // `onResume()` runs after `onStart()`, which runs after `onCreate()` and `onRestart()`.
1037     @Override
1038     public void onResume() {
1039         super.onResume();
1040
1041         // Resume JavaScript (if enabled).
1042         mainWebView.resumeTimers();
1043
1044         // Resume `mainWebView`.
1045         mainWebView.onResume();
1046
1047         // Resume the adView for the free flavor.
1048         if (BuildConfig.FLAVOR.contentEquals("free")) {
1049             BannerAd.resumeAd(adView);
1050         }
1051     }
1052
1053     @Override
1054     public void onPause() {
1055         // Pause `mainWebView`.
1056         mainWebView.onPause();
1057
1058         // Stop all JavaScript.
1059         mainWebView.pauseTimers();
1060
1061         // Pause the adView or it will continue to consume resources in the background on the free flavor.
1062         if (BuildConfig.FLAVOR.contentEquals("free")) {
1063             BannerAd.pauseAd(adView);
1064         }
1065
1066         super.onPause();
1067     }
1068
1069     @Override
1070     public boolean onCreateOptionsMenu(Menu menu) {
1071         // Inflate the menu; this adds items to the action bar if it is present.
1072         getMenuInflater().inflate(R.menu.webview_options_menu, menu);
1073
1074         // Set mainMenu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons`.
1075         mainMenu = menu;
1076
1077         // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
1078         updatePrivacyIcons(false);
1079
1080         // Get handles for the menu items.
1081         MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
1082         MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
1083         MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
1084         MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);
1085
1086         // Only display third-party cookies if SDK >= 21
1087         toggleThirdPartyCookiesMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
1088
1089         // Get the shared preference values.  `this` references the current context.
1090         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
1091
1092         // Set the status of the additional app bar icons.  The default is `false`.
1093         if (sharedPreferences.getBoolean("display_additional_app_bar_icons", false)) {
1094             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
1095             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
1096             toggleSaveFormDataMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
1097         } else { //Do not display the additional icons.
1098             toggleFirstPartyCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
1099             toggleDomStorageMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
1100             toggleSaveFormDataMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
1101         }
1102
1103         return true;
1104     }
1105
1106     @Override
1107     public boolean onPrepareOptionsMenu(Menu menu) {
1108         // Hide the keyboard (if displayed) so we can see the options menu.  `0` indicates no additional flags.
1109         inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
1110
1111         // Get handles for the menu items.
1112         MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
1113         MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
1114         MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
1115         MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);
1116         MenuItem clearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
1117         MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);
1118         MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
1119         MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
1120         MenuItem refreshMenuItem = menu.findItem(R.id.refresh);
1121
1122         // Set the status of the menu item checkboxes.
1123         toggleFirstPartyCookiesMenuItem.setChecked(firstPartyCookiesEnabled);
1124         toggleThirdPartyCookiesMenuItem.setChecked(thirdPartyCookiesEnabled);
1125         toggleDomStorageMenuItem.setChecked(domStorageEnabled);
1126         toggleSaveFormDataMenuItem.setChecked(saveFormDataEnabled);
1127         displayImagesMenuItem.setChecked(mainWebView.getSettings().getLoadsImagesAutomatically());
1128
1129         // Enable third-party cookies if first-party cookies are enabled.
1130         toggleThirdPartyCookiesMenuItem.setEnabled(firstPartyCookiesEnabled);
1131
1132         // Enable DOM Storage if JavaScript is enabled.
1133         toggleDomStorageMenuItem.setEnabled(javaScriptEnabled);
1134
1135         // Enable Clear Cookies if there are any.
1136         clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
1137
1138         // Enable Clear Form Data is there is any.
1139         WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(this);
1140         clearFormDataMenuItem.setEnabled(mainWebViewDatabase.hasFormData());
1141
1142         // Initialize font size variables.
1143         int fontSize = mainWebView.getSettings().getTextZoom();
1144         String fontSizeTitle;
1145         MenuItem selectedFontSizeMenuItem;
1146
1147         // Prepare the font size title and current size menu item.
1148         switch (fontSize) {
1149             case 25:
1150                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.twenty_five_percent);
1151                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_twenty_five_percent);
1152                 break;
1153
1154             case 50:
1155                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.fifty_percent);
1156                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
1157                 break;
1158
1159             case 75:
1160                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.seventy_five_percent);
1161                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_seventy_five_percent);
1162                 break;
1163
1164             case 100:
1165                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.one_hundred_percent);
1166                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
1167                 break;
1168
1169             case 125:
1170                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.one_hundred_twenty_five_percent);
1171                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_twenty_five_percent);
1172                 break;
1173
1174             case 150:
1175                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.one_hundred_fifty_percent);
1176                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_fifty_percent);
1177                 break;
1178
1179             case 175:
1180                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.one_hundred_seventy_five_percent);
1181                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_seventy_five_percent);
1182                 break;
1183
1184             case 200:
1185                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.two_hundred_percent);
1186                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_two_hundred_percent);
1187                 break;
1188
1189             default:
1190                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.one_hundred_percent);
1191                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
1192                 break;
1193         }
1194
1195         // Set the font size title and select the current size menu item.
1196         fontSizeMenuItem.setTitle(fontSizeTitle);
1197         selectedFontSizeMenuItem.setChecked(true);
1198
1199         // Only show `Refresh` if `swipeToRefresh` is disabled.
1200         refreshMenuItem.setVisible(!swipeToRefreshEnabled);
1201
1202         // Run all the other default commands.
1203         super.onPrepareOptionsMenu(menu);
1204
1205         // `return true` displays the menu.
1206         return true;
1207     }
1208
1209     @Override
1210     // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
1211     @SuppressLint("SetJavaScriptEnabled")
1212     // removeAllCookies is deprecated, but it is required for API < 21.
1213     @SuppressWarnings("deprecation")
1214     public boolean onOptionsItemSelected(MenuItem menuItem) {
1215         int menuItemId = menuItem.getItemId();
1216
1217         // Set the commands that relate to the menu entries.
1218         switch (menuItemId) {
1219             case R.id.toggle_javascript:
1220                 // Switch the status of javaScriptEnabled.
1221                 javaScriptEnabled = !javaScriptEnabled;
1222
1223                 // Apply the new JavaScript status.
1224                 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
1225
1226                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1227                 updatePrivacyIcons(true);
1228
1229                 // Display a `Snackbar`.
1230                 if (javaScriptEnabled) {  // JavaScrip is enabled.
1231                     Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
1232                 } else if (firstPartyCookiesEnabled) {  // JavaScript is disabled, but first-party cookies are enabled.
1233                     Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
1234                 } else {  // Privacy mode.
1235                     Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
1236                 }
1237
1238                 // Reload the WebView.
1239                 mainWebView.reload();
1240                 return true;
1241
1242             case R.id.toggle_first_party_cookies:
1243                 // Switch the status of firstPartyCookiesEnabled.
1244                 firstPartyCookiesEnabled = !firstPartyCookiesEnabled;
1245
1246                 // Update the menu checkbox.
1247                 menuItem.setChecked(firstPartyCookiesEnabled);
1248
1249                 // Apply the new cookie status.
1250                 cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
1251
1252                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1253                 updatePrivacyIcons(true);
1254
1255                 // Display a `Snackbar`.
1256                 if (firstPartyCookiesEnabled) {  // First-party cookies are enabled.
1257                     Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
1258                 } else if (javaScriptEnabled){  // JavaScript is still enabled.
1259                     Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
1260                 } else {  // Privacy mode.
1261                     Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
1262                 }
1263
1264                 // Reload the WebView.
1265                 mainWebView.reload();
1266                 return true;
1267
1268             case R.id.toggle_third_party_cookies:
1269                 if (Build.VERSION.SDK_INT >= 21) {
1270                     // Switch the status of thirdPartyCookiesEnabled.
1271                     thirdPartyCookiesEnabled = !thirdPartyCookiesEnabled;
1272
1273                     // Update the menu checkbox.
1274                     menuItem.setChecked(thirdPartyCookiesEnabled);
1275
1276                     // Apply the new cookie status.
1277                     cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
1278
1279                     // Display a `Snackbar`.
1280                     if (thirdPartyCookiesEnabled) {
1281                         Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
1282                     } else {
1283                         Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
1284                     }
1285
1286                     // Reload the WebView.
1287                     mainWebView.reload();
1288                 } // Else do nothing because SDK < 21.
1289                 return true;
1290
1291             case R.id.toggle_dom_storage:
1292                 // Switch the status of domStorageEnabled.
1293                 domStorageEnabled = !domStorageEnabled;
1294
1295                 // Update the menu checkbox.
1296                 menuItem.setChecked(domStorageEnabled);
1297
1298                 // Apply the new DOM Storage status.
1299                 mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
1300
1301                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1302                 updatePrivacyIcons(true);
1303
1304                 // Display a `Snackbar`.
1305                 if (domStorageEnabled) {
1306                     Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
1307                 } else {
1308                     Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
1309                 }
1310
1311                 // Reload the WebView.
1312                 mainWebView.reload();
1313                 return true;
1314
1315             case R.id.toggle_save_form_data:
1316                 // Switch the status of saveFormDataEnabled.
1317                 saveFormDataEnabled = !saveFormDataEnabled;
1318
1319                 // Update the menu checkbox.
1320                 menuItem.setChecked(saveFormDataEnabled);
1321
1322                 // Apply the new form data status.
1323                 mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
1324
1325                 // Display a `Snackbar`.
1326                 if (saveFormDataEnabled) {
1327                     Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
1328                 } else {
1329                     Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
1330                 }
1331
1332                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1333                 updatePrivacyIcons(true);
1334
1335                 // Reload the WebView.
1336                 mainWebView.reload();
1337                 return true;
1338
1339             case R.id.clear_cookies:
1340                 Snackbar.make(findViewById(R.id.main_webview), R.string.cookies_deleted, Snackbar.LENGTH_LONG)
1341                         .setAction(R.string.undo, new View.OnClickListener() {
1342                             @Override
1343                             public void onClick(View v) {
1344                                 // Do nothing because everything will be handled by `onDismissed()` below.
1345                             }
1346                         })
1347                         .addCallback(new Snackbar.Callback() {
1348                             @Override
1349                             public void onDismissed(Snackbar snackbar, int event) {
1350                                 switch (event) {
1351                                     // The user pushed the `Undo` button.
1352                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
1353                                         // Do nothing.
1354                                         break;
1355
1356                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
1357                                     default:
1358                                         // `cookieManager.removeAllCookie()` varies by SDK.
1359                                         if (Build.VERSION.SDK_INT < 21) {
1360                                             cookieManager.removeAllCookie();
1361                                         } else {
1362                                             // `null` indicates no callback.
1363                                             cookieManager.removeAllCookies(null);
1364                                         }
1365                                 }
1366                             }
1367                         })
1368                         .show();
1369                 return true;
1370
1371             case R.id.clear_dom_storage:
1372                 Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
1373                         .setAction(R.string.undo, new View.OnClickListener() {
1374                             @Override
1375                             public void onClick(View v) {
1376                                 // Do nothing because everything will be handled by `onDismissed()` below.
1377                             }
1378                         })
1379                         .addCallback(new Snackbar.Callback() {
1380                             @Override
1381                             public void onDismissed(Snackbar snackbar, int event) {
1382                                 switch (event) {
1383                                     // The user pushed the `Undo` button.
1384                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
1385                                         // Do nothing.
1386                                         break;
1387
1388                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
1389                                     default:
1390                                         // Delete the DOM Storage.
1391                                         WebStorage webStorage = WebStorage.getInstance();
1392                                         webStorage.deleteAllData();
1393                                 }
1394                             }
1395                         })
1396                         .show();
1397                 return true;
1398
1399             case R.id.clear_form_data:
1400                 Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_deleted, Snackbar.LENGTH_LONG)
1401                         .setAction(R.string.undo, new View.OnClickListener() {
1402                             @Override
1403                             public void onClick(View v) {
1404                                 // Do nothing because everything will be handled by `onDismissed()` below.
1405                             }
1406                         })
1407                         .addCallback(new Snackbar.Callback() {
1408                             @Override
1409                             public void onDismissed(Snackbar snackbar, int event) {
1410                                 switch (event) {
1411                                     // The user pushed the `Undo` button.
1412                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
1413                                         // Do nothing.
1414                                         break;
1415
1416                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
1417                                     default:
1418                                         // Delete the form data.
1419                                         WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
1420                                         mainWebViewDatabase.clearFormData();
1421                                 }
1422                             }
1423                         })
1424                         .show();
1425                 return true;
1426
1427             case R.id.font_size_twenty_five_percent:
1428                 mainWebView.getSettings().setTextZoom(25);
1429                 return true;
1430
1431             case R.id.font_size_fifty_percent:
1432                 mainWebView.getSettings().setTextZoom(50);
1433                 return true;
1434
1435             case R.id.font_size_seventy_five_percent:
1436                 mainWebView.getSettings().setTextZoom(75);
1437                 return true;
1438
1439             case R.id.font_size_one_hundred_percent:
1440                 mainWebView.getSettings().setTextZoom(100);
1441                 return true;
1442
1443             case R.id.font_size_one_hundred_twenty_five_percent:
1444                 mainWebView.getSettings().setTextZoom(125);
1445                 return true;
1446
1447             case R.id.font_size_one_hundred_fifty_percent:
1448                 mainWebView.getSettings().setTextZoom(150);
1449                 return true;
1450
1451             case R.id.font_size_one_hundred_seventy_five_percent:
1452                 mainWebView.getSettings().setTextZoom(175);
1453                 return true;
1454
1455             case R.id.font_size_two_hundred_percent:
1456                 mainWebView.getSettings().setTextZoom(200);
1457                 return true;
1458
1459             case R.id.display_images:
1460                 if (mainWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
1461                     mainWebView.getSettings().setLoadsImagesAutomatically(false);
1462                     mainWebView.reload();
1463                 } else {  // Images are not currently loaded automatically.
1464                     mainWebView.getSettings().setLoadsImagesAutomatically(true);
1465                 }
1466
1467                 // Set `onTheFlyDisplayImagesSet`.
1468                 onTheFlyDisplayImagesSet = true;
1469                 return true;
1470
1471             case R.id.share:
1472                 // Setup the share string.
1473                 String shareString;
1474                 if (webViewTitle != null) {
1475                     shareString = webViewTitle + " – " + urlTextBox.getText().toString();
1476                 } else {
1477                     shareString = urlTextBox.getText().toString();
1478                 }
1479
1480                 // Create the share intent.
1481                 Intent shareIntent = new Intent();
1482                 shareIntent.setAction(Intent.ACTION_SEND);
1483                 shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
1484                 shareIntent.setType("text/plain");
1485
1486                 // Make it so.
1487                 startActivity(Intent.createChooser(shareIntent, "Share URL"));
1488                 return true;
1489
1490             case R.id.find_on_page:
1491                 // Hide the URL app bar.
1492                 supportAppBar.setVisibility(View.GONE);
1493
1494                 // Show the Find on Page `RelativeLayout`.
1495                 findOnPageLinearLayout.setVisibility(View.VISIBLE);
1496
1497                 // Display the keyboard.  We have to wait 200 ms before running the command to work around a bug in Android.
1498                 // http://stackoverflow.com/questions/5520085/android-show-softkeyboard-with-showsoftinput-is-not-working
1499                 findOnPageEditText.postDelayed(new Runnable()
1500                 {
1501                     @Override
1502                     public void run()
1503                     {
1504                         // Set the focus on `findOnPageEditText`.
1505                         findOnPageEditText.requestFocus();
1506
1507                         // Display the keyboard.
1508                         inputMethodManager.showSoftInput(findOnPageEditText, 0);
1509                     }
1510                 }, 200);
1511                 return true;
1512
1513             case R.id.print:
1514                 // Get a `PrintManager` instance.
1515                 PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
1516
1517                 // Convert `mainWebView` to `printDocumentAdapter`.
1518                 PrintDocumentAdapter printDocumentAdapter = mainWebView.createPrintDocumentAdapter();
1519
1520                 // Print the document.  The print attributes are `null`.
1521                 printManager.print(getResources().getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
1522                 return true;
1523
1524             case R.id.add_to_homescreen:
1525                 // Show the `CreateHomeScreenShortcutDialog` `AlertDialog` and name this instance `R.string.create_shortcut`.
1526                 AppCompatDialogFragment createHomeScreenShortcutDialogFragment = new CreateHomeScreenShortcutDialog();
1527                 createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getResources().getString(R.string.create_shortcut));
1528
1529                 //Everything else will be handled by `CreateHomeScreenShortcutDialog` and the associated listener below.
1530                 return true;
1531
1532             case R.id.refresh:
1533                 mainWebView.reload();
1534                 return true;
1535
1536             default:
1537                 // Don't consume the event.
1538                 return super.onOptionsItemSelected(menuItem);
1539         }
1540     }
1541
1542     // removeAllCookies is deprecated, but it is required for API < 21.
1543     @SuppressWarnings("deprecation")
1544     @Override
1545     public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
1546         int menuItemId = menuItem.getItemId();
1547
1548         switch (menuItemId) {
1549             case R.id.home:
1550                 loadUrl(homepage);
1551                 break;
1552
1553             case R.id.back:
1554                 if (mainWebView.canGoBack()) {
1555                     // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
1556                     navigatingHistory = true;
1557
1558                     // Load the previous website in the history.
1559                     mainWebView.goBack();
1560                 }
1561                 break;
1562
1563             case R.id.forward:
1564                 if (mainWebView.canGoForward()) {
1565                     // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
1566                     navigatingHistory = true;
1567
1568                     // Load the next website in the history.
1569                     mainWebView.goForward();
1570                 }
1571                 break;
1572
1573             case R.id.history:
1574                 // Get the `WebBackForwardList`.
1575                 WebBackForwardList webBackForwardList = mainWebView.copyBackForwardList();
1576
1577                 // Show the `UrlHistoryDialog` `AlertDialog` and name this instance `R.string.history`.  `this` is the `Context`.
1578                 AppCompatDialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(this, webBackForwardList);
1579                 urlHistoryDialogFragment.show(getSupportFragmentManager(), getResources().getString(R.string.history));
1580                 break;
1581
1582             case R.id.bookmarks:
1583                 // Launch BookmarksActivity.
1584                 Intent bookmarksIntent = new Intent(this, BookmarksActivity.class);
1585                 startActivity(bookmarksIntent);
1586                 break;
1587
1588             case R.id.downloads:
1589                 // Launch the system Download Manager.
1590                 Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
1591
1592                 // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
1593                 downloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1594
1595                 startActivity(downloadManagerIntent);
1596                 break;
1597
1598             case R.id.settings:
1599                 // Reset `currentDomainName` so that domain settings are reapplied after returning to `MainWebViewActivity`.
1600                 currentDomainName = "";
1601
1602                 // Launch `SettingsActivity`.
1603                 Intent settingsIntent = new Intent(this, SettingsActivity.class);
1604                 startActivity(settingsIntent);
1605                 break;
1606
1607             case R.id.domains:
1608                 // Reset `currentDomainName` so that domain settings are reapplied after returning to `MainWebViewActivity`.
1609                 currentDomainName = "";
1610
1611                 // Launch `DomainsActivity`.
1612                 Intent domainsIntent = new Intent(this, DomainsActivity.class);
1613                 startActivity(domainsIntent);
1614                 break;
1615
1616             case R.id.guide:
1617                 // Launch `GuideActivity`.
1618                 Intent guideIntent = new Intent(this, GuideActivity.class);
1619                 startActivity(guideIntent);
1620                 break;
1621
1622             case R.id.about:
1623                 // Launch `AboutActivity`.
1624                 Intent aboutIntent = new Intent(this, AboutActivity.class);
1625                 startActivity(aboutIntent);
1626                 break;
1627
1628             case R.id.clearAndExit:
1629                 // Get a handle for `sharedPreferences`.  `this` references the current context.
1630                 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
1631
1632                 boolean clearEverything = sharedPreferences.getBoolean("clear_everything", true);
1633
1634                 // Clear cookies.
1635                 if (clearEverything || sharedPreferences.getBoolean("clear_cookies", true)) {
1636                     // The command to remove cookies changed slightly in API 21.
1637                     if (Build.VERSION.SDK_INT >= 21) {
1638                         cookieManager.removeAllCookies(null);
1639                     } else {
1640                         cookieManager.removeAllCookie();
1641                     }
1642
1643                     // Manually delete the cookies database, as `CookieManager` sometimes will not flush its changes to disk before `System.exit(0)` is run.
1644                     try {
1645                         // We have to use two commands because `Runtime.exec()` does not like `*`.
1646                         privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies");
1647                         privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies-journal");
1648                     } catch (IOException e) {
1649                         // Do nothing if an error is thrown.
1650                     }
1651                 }
1652
1653                 // Clear DOM storage.
1654                 if (clearEverything || sharedPreferences.getBoolean("clear_dom_storage", true)) {
1655                     // Ask `WebStorage` to clear the DOM storage.
1656                     WebStorage webStorage = WebStorage.getInstance();
1657                     webStorage.deleteAllData();
1658
1659                     // Manually delete the DOM storage directory, as `WebStorage` sometimes will not flush its changes to disk before `System.exit(0)` is run.
1660                     try {
1661                         // We have to use a `String[]` because the directory contains a space and `Runtime.exec` will not escape the string correctly otherwise.
1662                         privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
1663                     } catch (IOException e) {
1664                         // Do nothing if an error is thrown.
1665                     }
1666                 }
1667
1668                 // Clear form data.
1669                 if (clearEverything || sharedPreferences.getBoolean("clear_form_data", true)) {
1670                     WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
1671                     webViewDatabase.clearFormData();
1672
1673                     // Manually delete the form data database, as `WebViewDatabase` sometimes will not flush its changes to disk before `System.exit(0)` is run.
1674                     try {
1675                         // We have to use a `String[]` because the database contains a space and `Runtime.exec` will not escape the string correctly otherwise.
1676                         privacyBrowserRuntime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data"});
1677                         privacyBrowserRuntime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data-journal"});
1678                     } catch (IOException e) {
1679                         // Do nothing if an error is thrown.
1680                     }
1681                 }
1682
1683                 // Clear the cache.
1684                 if (clearEverything || sharedPreferences.getBoolean("clear_cache", true)) {
1685                     // `true` includes disk files.
1686                     mainWebView.clearCache(true);
1687
1688                     // Manually delete the cache directories.
1689                     try {
1690                         // Delete the main cache directory.
1691                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
1692
1693                         // 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.
1694                         privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
1695                     } catch (IOException e) {
1696                         // Do nothing if an error is thrown.
1697                     }
1698                 }
1699
1700                 // Clear SSL certificate preferences.
1701                 mainWebView.clearSslPreferences();
1702
1703                 // Clear the back/forward history.
1704                 mainWebView.clearHistory();
1705
1706                 // Clear `formattedUrlString`.
1707                 formattedUrlString = null;
1708
1709                 // Clear `customHeaders`.
1710                 customHeaders.clear();
1711
1712                 // Detach all views from `mainWebViewRelativeLayout`.
1713                 mainWebViewRelativeLayout.removeAllViews();
1714
1715                 // Destroy the internal state of `mainWebView`.
1716                 mainWebView.destroy();
1717
1718                 // Manually delete the `app_webview` folder, which contains the cookies, DOM storage, form data, and `Service Worker` cache.
1719                 // See `https://code.google.com/p/android/issues/detail?id=233826&thanks=233826&ts=1486670530`.
1720                 if (clearEverything) {
1721                     try {
1722                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview");
1723                     } catch (IOException e) {
1724                         // Do nothing if an error is thrown.
1725                     }
1726                 }
1727
1728                 // Close Privacy Browser.  `finishAndRemoveTask` also removes Privacy Browser from the recent app list.
1729                 if (Build.VERSION.SDK_INT >= 21) {
1730                     finishAndRemoveTask();
1731                 } else {
1732                     finish();
1733                 }
1734
1735                 // Remove the terminated program from RAM.  The status code is `0`.
1736                 System.exit(0);
1737                 break;
1738         }
1739
1740         // Close the navigation drawer.
1741         drawerLayout.closeDrawer(GravityCompat.START);
1742         return true;
1743     }
1744
1745     @Override
1746     public void onPostCreate(Bundle savedInstanceState) {
1747         super.onPostCreate(savedInstanceState);
1748
1749         // Sync the state of the DrawerToggle after onRestoreInstanceState has finished.
1750         drawerToggle.syncState();
1751     }
1752
1753     @Override
1754     public void onConfigurationChanged(Configuration newConfig) {
1755         super.onConfigurationChanged(newConfig);
1756
1757         // Reload the ad for the free flavor if we are not in full screen mode.
1758         if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
1759             // Reload the ad.
1760             BannerAd.reloadAfterRotate(adView, getApplicationContext(), getString(R.string.ad_id));
1761
1762             // Reinitialize the `adView` variable, as the `View` will have been removed and re-added by `BannerAd.reloadAfterRotate()`.
1763             adView = findViewById(R.id.adview);
1764         }
1765
1766         // `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
1767         // ActivityCompat.invalidateOptionsMenu(this);
1768     }
1769
1770     @Override
1771     public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
1772         // Store the `HitTestResult`.
1773         final WebView.HitTestResult hitTestResult = mainWebView.getHitTestResult();
1774
1775         // Create strings.
1776         final String imageUrl;
1777         final String linkUrl;
1778
1779         // Get a handle for the `ClipboardManager`.
1780         final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
1781
1782         switch (hitTestResult.getType()) {
1783             // `SRC_ANCHOR_TYPE` is a link.
1784             case WebView.HitTestResult.SRC_ANCHOR_TYPE:
1785                 // Get the target URL.
1786                 linkUrl = hitTestResult.getExtra();
1787
1788                 // Set the target URL as the title of the `ContextMenu`.
1789                 menu.setHeaderTitle(linkUrl);
1790
1791                 // Add a `Load URL` entry.
1792                 menu.add(R.string.load_url).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1793                     @Override
1794                     public boolean onMenuItemClick(MenuItem item) {
1795                         loadUrl(linkUrl);
1796                         return false;
1797                     }
1798                 });
1799
1800                 // Add a `Copy URL` entry.
1801                 menu.add(R.string.copy_url).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1802                     @Override
1803                     public boolean onMenuItemClick(MenuItem item) {
1804                         // Save the link URL in a `ClipData`.
1805                         ClipData srcAnchorTypeClipData = ClipData.newPlainText(getResources().getString(R.string.url), linkUrl);
1806
1807                         // Set the `ClipData` as the clipboard's primary clip.
1808                         clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
1809                         return false;
1810                     }
1811                 });
1812
1813                 // Add a `Cancel` entry, which by default closes the `ContextMenu`.
1814                 menu.add(R.string.cancel);
1815                 break;
1816
1817             case WebView.HitTestResult.EMAIL_TYPE:
1818                 // Get the target URL.
1819                 linkUrl = hitTestResult.getExtra();
1820
1821                 // Set the target URL as the title of the `ContextMenu`.
1822                 menu.setHeaderTitle(linkUrl);
1823
1824                 // Add a `Write Email` entry.
1825                 menu.add(R.string.write_email).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1826                     @Override
1827                     public boolean onMenuItemClick(MenuItem item) {
1828                         // We use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
1829                         Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
1830
1831                         // Parse the url and set it as the data for the `Intent`.
1832                         emailIntent.setData(Uri.parse("mailto:" + linkUrl));
1833
1834                         // `FLAG_ACTIVITY_NEW_TASK` opens the email program in a new task instead as part of Privacy Browser.
1835                         emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1836
1837                         // Make it so.
1838                         startActivity(emailIntent);
1839                         return false;
1840                     }
1841                 });
1842
1843                 // Add a `Copy Email Address` entry.
1844                 menu.add(R.string.copy_email_address).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1845                     @Override
1846                     public boolean onMenuItemClick(MenuItem item) {
1847                         // Save the email address in a `ClipData`.
1848                         ClipData srcEmailTypeClipData = ClipData.newPlainText(getResources().getString(R.string.email_address), linkUrl);
1849
1850                         // Set the `ClipData` as the clipboard's primary clip.
1851                         clipboardManager.setPrimaryClip(srcEmailTypeClipData);
1852                         return false;
1853                     }
1854                 });
1855
1856                 // Add a `Cancel` entry, which by default closes the `ContextMenu`.
1857                 menu.add(R.string.cancel);
1858                 break;
1859
1860             // `IMAGE_TYPE` is an image.
1861             case WebView.HitTestResult.IMAGE_TYPE:
1862                 // Get the image URL.
1863                 imageUrl = hitTestResult.getExtra();
1864
1865                 // Set the image URL as the title of the `ContextMenu`.
1866                 menu.setHeaderTitle(imageUrl);
1867
1868                 // Add a `View Image` entry.
1869                 menu.add(R.string.view_image).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1870                     @Override
1871                     public boolean onMenuItemClick(MenuItem item) {
1872                         loadUrl(imageUrl);
1873                         return false;
1874                     }
1875                 });
1876
1877                 // Add a `Download Image` entry.
1878                 menu.add(R.string.download_image).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1879                     @Override
1880                     public boolean onMenuItemClick(MenuItem item) {
1881                         // Show the `DownloadImageDialog` `AlertDialog` and name this instance `@string/download`.
1882                         AppCompatDialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
1883                         downloadImageDialogFragment.show(getSupportFragmentManager(), getResources().getString(R.string.download));
1884                         return false;
1885                     }
1886                 });
1887
1888                 // Add a `Copy URL` entry.
1889                 menu.add(R.string.copy_url).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1890                     @Override
1891                     public boolean onMenuItemClick(MenuItem item) {
1892                         // Save the image URL in a `ClipData`.
1893                         ClipData srcImageTypeClipData = ClipData.newPlainText(getResources().getString(R.string.url), imageUrl);
1894
1895                         // Set the `ClipData` as the clipboard's primary clip.
1896                         clipboardManager.setPrimaryClip(srcImageTypeClipData);
1897                         return false;
1898                     }
1899                 });
1900
1901                 // Add a `Cancel` entry, which by default closes the `ContextMenu`.
1902                 menu.add(R.string.cancel);
1903                 break;
1904
1905
1906             // `SRC_IMAGE_ANCHOR_TYPE` is an image that is also a link.
1907             case WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE:
1908                 // Get the image URL.
1909                 imageUrl = hitTestResult.getExtra();
1910
1911                 // Set the image URL as the title of the `ContextMenu`.
1912                 menu.setHeaderTitle(imageUrl);
1913
1914                 // Add a `View Image` entry.
1915                 menu.add(R.string.view_image).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1916                     @Override
1917                     public boolean onMenuItemClick(MenuItem item) {
1918                         loadUrl(imageUrl);
1919                         return false;
1920                     }
1921                 });
1922
1923                 // Add a `Download Image` entry.
1924                 menu.add(R.string.download_image).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1925                     @Override
1926                     public boolean onMenuItemClick(MenuItem item) {
1927                         // Show the `DownloadImageDialog` `AlertDialog` and name this instance `@string/download`.
1928                         AppCompatDialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
1929                         downloadImageDialogFragment.show(getSupportFragmentManager(), getResources().getString(R.string.download));
1930                         return false;
1931                     }
1932                 });
1933
1934                 // Add a `Copy URL` entry.
1935                 menu.add(R.string.copy_url).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1936                     @Override
1937                     public boolean onMenuItemClick(MenuItem item) {
1938                         // Save the image URL in a `ClipData`.
1939                         ClipData srcImageAnchorTypeClipData = ClipData.newPlainText(getResources().getString(R.string.url), imageUrl);
1940
1941                         // Set the `ClipData` as the clipboard's primary clip.
1942                         clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
1943                         return false;
1944                     }
1945                 });
1946
1947                 // Add a `Cancel` entry, which by default closes the `ContextMenu`.
1948                 menu.add(R.string.cancel);
1949                 break;
1950         }
1951     }
1952
1953     @Override
1954     public void onCreateHomeScreenShortcut(AppCompatDialogFragment dialogFragment) {
1955         // Get shortcutNameEditText from the alert dialog.
1956         EditText shortcutNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.shortcut_name_edittext);
1957
1958         // Create the bookmark shortcut based on formattedUrlString.
1959         Intent bookmarkShortcut = new Intent();
1960         bookmarkShortcut.setAction(Intent.ACTION_VIEW);
1961         bookmarkShortcut.setData(Uri.parse(formattedUrlString));
1962
1963         // Place the bookmark shortcut on the home screen.
1964         Intent placeBookmarkShortcut = new Intent();
1965         placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.INTENT", bookmarkShortcut);
1966         placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.NAME", shortcutNameEditText.getText().toString());
1967         placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.ICON", favoriteIconBitmap);
1968         placeBookmarkShortcut.setAction("com.android.launcher.action.INSTALL_SHORTCUT");
1969         sendBroadcast(placeBookmarkShortcut);
1970     }
1971
1972     @Override
1973     public void onDownloadImage(AppCompatDialogFragment dialogFragment, String imageUrl) {
1974         // Download the image if it has an HTTP or HTTPS URI.
1975         if (imageUrl.startsWith("http")) {
1976             // Get a handle for the system `DOWNLOAD_SERVICE`.
1977             DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
1978
1979             // Parse `imageUrl`.
1980             DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(imageUrl));
1981
1982             // Pass cookies to download manager if cookies are enabled.  This is required to download images from websites that require a login.
1983             // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
1984             if (firstPartyCookiesEnabled) {
1985                 // Get the cookies for `imageUrl`.
1986                 String cookies = cookieManager.getCookie(imageUrl);
1987
1988                 // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
1989                 downloadRequest.addRequestHeader("Cookie", cookies);
1990             }
1991
1992             // Get the file name from `dialogFragment`.
1993             EditText downloadImageNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.download_image_name);
1994             String imageName = downloadImageNameEditText.getText().toString();
1995
1996             // Once we have `WRITE_EXTERNAL_STORAGE` permissions we can use `setDestinationInExternalPublicDir`.
1997             if (Build.VERSION.SDK_INT >= 23) { // If API >= 23, set the download save in the the `DIRECTORY_DOWNLOADS` using `imageName`.
1998                 downloadRequest.setDestinationInExternalFilesDir(this, "/", imageName);
1999             } else { // Only set the title using `imageName`.
2000                 downloadRequest.setTitle(imageName);
2001             }
2002
2003             // Allow `MediaScanner` to index the download if it is a media file.
2004             downloadRequest.allowScanningByMediaScanner();
2005
2006             // Add the URL as the description for the download.
2007             downloadRequest.setDescription(imageUrl);
2008
2009             // Show the download notification after the download is completed.
2010             downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
2011
2012             // Initiate the download.
2013             downloadManager.enqueue(downloadRequest);
2014         } else {  // The image is not an HTTP or HTTPS URI.
2015             Snackbar.make(mainWebView, R.string.cannot_download_image, Snackbar.LENGTH_INDEFINITE).show();
2016         }
2017     }
2018
2019     @Override
2020     public void onDownloadFile(AppCompatDialogFragment dialogFragment, String downloadUrl) {
2021         // Download the file if it has an HTTP or HTTPS URI.
2022         if (downloadUrl.startsWith("http")) {
2023
2024             // Get a handle for the system `DOWNLOAD_SERVICE`.
2025             DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
2026
2027             // Parse `downloadUrl`.
2028             DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(downloadUrl));
2029
2030             // Pass cookies to download manager if cookies are enabled.  This is required to download files from websites that require a login.
2031             // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
2032             if (firstPartyCookiesEnabled) {
2033                 // Get the cookies for `downloadUrl`.
2034                 String cookies = cookieManager.getCookie(downloadUrl);
2035
2036                 // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
2037                 downloadRequest.addRequestHeader("Cookie", cookies);
2038             }
2039
2040             // Get the file name from `dialogFragment`.
2041             EditText downloadFileNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.download_file_name);
2042             String fileName = downloadFileNameEditText.getText().toString();
2043
2044             // Once we have `WRITE_EXTERNAL_STORAGE` permissions we can use `setDestinationInExternalPublicDir`.
2045             if (Build.VERSION.SDK_INT >= 23) { // If API >= 23, set the download location to `/sdcard/Android/data/com.stoutner.privacybrowser.standard/files` named `fileName`.
2046                 downloadRequest.setDestinationInExternalFilesDir(this, "/", fileName);
2047             } else { // Only set the title using `fileName`.
2048                 downloadRequest.setTitle(fileName);
2049             }
2050
2051             // Allow `MediaScanner` to index the download if it is a media file.
2052             downloadRequest.allowScanningByMediaScanner();
2053
2054             // Add the URL as the description for the download.
2055             downloadRequest.setDescription(downloadUrl);
2056
2057             // Show the download notification after the download is completed.
2058             downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
2059
2060             // Initiate the download.
2061             downloadManager.enqueue(downloadRequest);
2062         } else {  // The download is not an HTTP or HTTPS URI.
2063             Snackbar.make(mainWebView, R.string.cannot_download_file, Snackbar.LENGTH_INDEFINITE).show();
2064         }
2065     }
2066
2067     public void viewSslCertificate(View view) {
2068         // Show the `ViewSslCertificateDialog` `AlertDialog` and name this instance `@string/view_ssl_certificate`.
2069         DialogFragment viewSslCertificateDialogFragment = new ViewSslCertificateDialog();
2070         viewSslCertificateDialogFragment.show(getFragmentManager(), getResources().getString(R.string.view_ssl_certificate));
2071     }
2072
2073     @Override
2074     public void onSslErrorCancel() {
2075         sslErrorHandler.cancel();
2076     }
2077
2078     @Override
2079     public void onSslErrorProceed() {
2080         sslErrorHandler.proceed();
2081     }
2082
2083     @Override
2084     public void onUrlHistoryEntrySelected(int moveBackOrForwardSteps) {
2085         // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
2086         navigatingHistory = true;
2087
2088         // Load the history entry.
2089         mainWebView.goBackOrForward(moveBackOrForwardSteps);
2090     }
2091
2092     @Override
2093     public void onClearHistory() {
2094         // Clear the history.
2095         mainWebView.clearHistory();
2096     }
2097
2098     // Override `onBackPressed` to handle the navigation drawer and `mainWebView`.
2099     @Override
2100     public void onBackPressed() {
2101         // Close the navigation drawer if it is available.  GravityCompat.START is the drawer on the left on Left-to-Right layout text.
2102         if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
2103             drawerLayout.closeDrawer(GravityCompat.START);
2104         } else {
2105             // Load the previous URL if available.
2106             if (mainWebView.canGoBack()) {
2107                 // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
2108                 navigatingHistory = true;
2109
2110                 // Go back.
2111                 mainWebView.goBack();
2112             } else {
2113                 // Pass `onBackPressed()` to the system.
2114                 super.onBackPressed();
2115             }
2116         }
2117     }
2118
2119     private void loadUrlFromTextBox() throws UnsupportedEncodingException {
2120         // Get the text from urlTextBox and convert it to a string.  trim() removes white spaces from the beginning and end of the string.
2121         String unformattedUrlString = urlTextBox.getText().toString().trim();
2122
2123         // Check to see if `unformattedUrlString` is a valid URL.  Otherwise, convert it into a search.
2124         if ((Patterns.WEB_URL.matcher(unformattedUrlString).matches()) || (unformattedUrlString.startsWith("http://")) || (unformattedUrlString.startsWith("https://"))) {
2125             // Add `http://` at the beginning if it is missing.  Otherwise the app will segfault.
2126             if (!unformattedUrlString.startsWith("http")) {
2127                 unformattedUrlString = "http://" + unformattedUrlString;
2128             }
2129
2130             // Initialize `unformattedUrl`.
2131             URL unformattedUrl = null;
2132
2133             // 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.
2134             try {
2135                 unformattedUrl = new URL(unformattedUrlString);
2136             } catch (MalformedURLException e) {
2137                 e.printStackTrace();
2138             }
2139
2140             // The ternary operator (? :) makes sure that a null pointer exception is not thrown, which would happen if `.get` was called on a `null` value.
2141             final String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null;
2142             final String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null;
2143             final String path = unformattedUrl != null ? unformattedUrl.getPath() : null;
2144             final String query = unformattedUrl != null ? unformattedUrl.getQuery() : null;
2145             final String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null;
2146
2147             // Build the URI.
2148             Uri.Builder formattedUri = new Uri.Builder();
2149             formattedUri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
2150
2151             // Decode `formattedUri` as a `String` in `UTF-8`.
2152             formattedUrlString = URLDecoder.decode(formattedUri.build().toString(), "UTF-8");
2153         } else {
2154             // Sanitize the search input and convert it to a search.
2155             final String encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
2156
2157             // Add the base search URL.
2158             formattedUrlString = searchURL + encodedUrlString;
2159         }
2160
2161         loadUrl(formattedUrlString);
2162
2163         // Hide the keyboard so we can see the webpage.  `0` indicates no additional flags.
2164         inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
2165     }
2166
2167
2168     private void loadUrl(String url) {
2169         // Apply any custom domain settings.
2170         applyDomainSettings(url);
2171
2172         // Load the URL.
2173         mainWebView.loadUrl(url, customHeaders);
2174     }
2175
2176     public void findPreviousOnPage(View view) {
2177         // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
2178         mainWebView.findNext(false);
2179     }
2180
2181     public void findNextOnPage(View view) {
2182         // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
2183         mainWebView.findNext(true);
2184     }
2185
2186     public void closeFindOnPage(View view) {
2187         // Delete the contents of `find_on_page_edittext`.
2188         findOnPageEditText.setText(null);
2189
2190         // Clear the highlighted phrases.
2191         mainWebView.clearMatches();
2192
2193         // Hide the Find on Page `RelativeLayout`.
2194         findOnPageLinearLayout.setVisibility(View.GONE);
2195
2196         // Show the URL app bar.
2197         supportAppBar.setVisibility(View.VISIBLE);
2198
2199         // Hide the keyboard so we can see the webpage.  `0` indicates no additional flags.
2200         inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
2201     }
2202
2203     private void applyAppSettings() {
2204         // Get a handle for `sharedPreferences`.  `this` references the current context.
2205         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
2206
2207         // Store the values from `sharedPreferences` in variables.
2208         String homepageString = sharedPreferences.getString("homepage", "https://start.duckduckgo.com");
2209         String torHomepageString = sharedPreferences.getString("tor_homepage", "https://3g2upl4pq6kufc4m.onion");
2210         String torSearchString = sharedPreferences.getString("tor_search", "https://3g2upl4pq6kufc4m.onion/html/?q=");
2211         String torSearchCustomURLString = sharedPreferences.getString("tor_search_custom_url", "");
2212         String searchString = sharedPreferences.getString("search", "https://duckduckgo.com/html/?q=");
2213         String searchCustomURLString = sharedPreferences.getString("search_custom_url", "");
2214         adBlockerEnabled = sharedPreferences.getBoolean("block_ads", true);
2215         incognitoModeEnabled = sharedPreferences.getBoolean("incognito_mode", false);
2216         boolean doNotTrackEnabled = sharedPreferences.getBoolean("do_not_track", false);
2217         boolean proxyThroughOrbot = sharedPreferences.getBoolean("proxy_through_orbot", false);
2218         fullScreenBrowsingModeEnabled = sharedPreferences.getBoolean("full_screen_browsing_mode", false);
2219         hideSystemBarsOnFullscreen = sharedPreferences.getBoolean("hide_system_bars", false);
2220         translucentNavigationBarOnFullscreen = sharedPreferences.getBoolean("translucent_navigation_bar", true);
2221         swipeToRefreshEnabled = sharedPreferences.getBoolean("swipe_to_refresh", false);
2222         displayWebpageImagesBoolean = sharedPreferences.getBoolean("display_webpage_images", true);
2223
2224         // Set the homepage, search, and proxy options.
2225         if (proxyThroughOrbot) {  // Set the Tor options.
2226             // Set `torHomepageString` as `homepage`.
2227             homepage = torHomepageString;
2228
2229             // If formattedUrlString is null assign the homepage to it.
2230             if (formattedUrlString == null) {
2231                 formattedUrlString = homepage;
2232             }
2233
2234             // Set the search URL.
2235             if (torSearchString.equals("Custom URL")) {  // Get the custom URL string.
2236                 searchURL = torSearchCustomURLString;
2237             } else {  // Use the string from the pre-built list.
2238                 searchURL = torSearchString;
2239             }
2240
2241             // Set the proxy.  `this` refers to the current activity where an `AlertDialog` might be displayed.
2242             OrbotProxyHelper.setProxy(getApplicationContext(), this, "localhost", "8118");
2243
2244             // Set the `appBar` background to indicate proxying through Orbot is enabled.  `this` refers to the context.
2245             if (darkTheme) {
2246                 appBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.dark_blue_30));
2247             } else {
2248                 appBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.blue_50));
2249             }
2250
2251             // Display a message to the user if we are waiting on Orbot.
2252             if (!orbotStatus.equals("ON")) {
2253                 // Set `waitingForOrbot`.
2254                 waitingForOrbot = true;
2255
2256                 // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
2257                 mainWebView.loadData(waitingForOrbotHTMLString, "text/html", null);
2258             }
2259         } else {  // Set the non-Tor options.
2260             // Set `homepageString` as `homepage`.
2261             homepage = homepageString;
2262
2263             // If formattedUrlString is null assign the homepage to it.
2264             if (formattedUrlString == null) {
2265                 formattedUrlString = homepage;
2266             }
2267
2268             // Set the search URL.
2269             if (searchString.equals("Custom URL")) {  // Get the custom URL string.
2270                 searchURL = searchCustomURLString;
2271             } else {  // Use the string from the pre-built list.
2272                 searchURL = searchString;
2273             }
2274
2275             // Reset the proxy to default.  The host is `""` and the port is `"0"`.
2276             OrbotProxyHelper.setProxy(getApplicationContext(), this, "", "0");
2277
2278             // Set the default `appBar` background.  `this` refers to the context.
2279             if (darkTheme) {
2280                 appBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.gray_900));
2281             } else {
2282                 appBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.gray_100));
2283             }
2284
2285             // Reset `waitingForOrbot.
2286             waitingForOrbot = false;
2287         }
2288
2289         // Set swipe to refresh.
2290         swipeRefreshLayout.setEnabled(swipeToRefreshEnabled);
2291
2292         // Set Do Not Track status.
2293         if (doNotTrackEnabled) {
2294             customHeaders.put("DNT", "1");
2295         } else {
2296             customHeaders.remove("DNT");
2297         }
2298
2299         // Apply the appropriate full screen mode the `SYSTEM_UI` flags.
2300         if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {
2301             if (hideSystemBarsOnFullscreen) {  // Hide everything.
2302                 // Remove the translucent navigation setting if it is currently flagged.
2303                 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
2304
2305                 // Remove the translucent status bar overlay.
2306                 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
2307
2308                 // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
2309                 drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
2310
2311                 /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
2312                  * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
2313                  * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically rehides them after they are shown.
2314                  */
2315                 rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
2316             } else {  // Hide everything except the status and navigation bars.
2317                 // Add the translucent status flag if it is unset.
2318                 getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
2319
2320                 if (translucentNavigationBarOnFullscreen) {
2321                     // Set the navigation bar to be translucent.
2322                     getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
2323                 } else {
2324                     // Set the navigation bar to be black.
2325                     getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
2326                 }
2327             }
2328         } else {  // Switch to normal viewing mode.
2329             // Reset `inFullScreenBrowsingMode` to `false`.
2330             inFullScreenBrowsingMode = false;
2331
2332             // Show the `appBar` if `findOnPageLinearLayout` is not visible.
2333             if (findOnPageLinearLayout.getVisibility() == View.GONE) {
2334                 appBar.show();
2335             }
2336
2337             // Show the `BannerAd` in the free flavor.
2338             if (BuildConfig.FLAVOR.contentEquals("free")) {
2339                 // Reload the ad.  Because the screen may have rotated, we need to use `reloadAfterRotate`.
2340                 BannerAd.reloadAfterRotate(adView, getApplicationContext(), getString(R.string.ad_id));
2341
2342                 // Reinitialize the `adView` variable, as the `View` will have been removed and re-added by `BannerAd.reloadAfterRotate()`.
2343                 adView = findViewById(R.id.adview);
2344             }
2345
2346             // Remove the translucent navigation bar flag if it is set.
2347             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
2348
2349             // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
2350             getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
2351
2352             // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
2353             rootCoordinatorLayout.setSystemUiVisibility(0);
2354
2355             // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
2356             rootCoordinatorLayout.setFitsSystemWindows(true);
2357         }
2358     }
2359
2360     // We have to use the deprecated `.getDrawable()` until the minimum API >= 21.
2361     @SuppressWarnings("deprecation")
2362     private void applyDomainSettings(String url) {
2363         // Reset `navigatingHistory`.
2364         navigatingHistory = false;
2365
2366         // Parse the URL into a URI.
2367         Uri uri = Uri.parse(url);
2368
2369         // Extract the domain from `uri`.
2370         String hostName = uri.getHost();
2371
2372         // Initialize `loadingNewDomainName`.
2373         boolean loadingNewDomainName;
2374
2375         // If either `hostName` or `currentDomainName` are `null`, run the options for loading a new domain name.
2376         // The lint suggestion to simplify the `if` statement is incorrect, because `hostName.equals(currentDomainName)` can produce a `null object reference.`
2377         //noinspection SimplifiableIfStatement
2378         if ((hostName == null) || (currentDomainName == null)) {
2379             loadingNewDomainName = true;
2380         } else {  // Determine if `hostName` equals `currentDomainName`.
2381             loadingNewDomainName = !hostName.equals(currentDomainName);
2382         }
2383
2384         // 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.
2385         if (loadingNewDomainName) {
2386             // Set the new `hostname` as the `currentDomainName`.
2387             currentDomainName = hostName;
2388
2389             // Reset `favoriteIconBitmap` and display it in the `appbar`.
2390             favoriteIconBitmap = favoriteIconDefaultBitmap;
2391             favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(favoriteIconBitmap, 64, 64, true));
2392
2393             // Initialize the database handler.  `this` specifies the context.  The two `nulls` do not specify the database name or a `CursorFactory`.
2394             // The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
2395             DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
2396
2397             // Get a full cursor from `domainsDatabaseHelper`.
2398             Cursor domainNameCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
2399
2400             // Initialize `domainSettingsSet`.
2401             Set<String> domainSettingsSet = new HashSet<>();
2402
2403             // Get the domain name column index.
2404             int domainNameColumnIndex = domainNameCursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME);
2405
2406             // Populate `domainSettingsSet`.
2407             for (int i = 0; i < domainNameCursor.getCount(); i++) {
2408                 // Move `domainsCursor` to the current row.
2409                 domainNameCursor.moveToPosition(i);
2410
2411                 // Store the domain name in `domainSettingsSet`.
2412                 domainSettingsSet.add(domainNameCursor.getString(domainNameColumnIndex));
2413             }
2414
2415             // Close `domainNameCursor.
2416             domainNameCursor.close();
2417
2418             // Initialize variables to track if domain settings will be applied and, if so, under which name.
2419             domainSettingsApplied = false;
2420             String domainNameInDatabase = null;
2421
2422             // Check the hostname.
2423             if (domainSettingsSet.contains(hostName)) {
2424                 domainSettingsApplied = true;
2425                 domainNameInDatabase = hostName;
2426             }
2427
2428             // If `hostName` is not `null`, check all the subdomains of `hostName` against wildcard domains in `domainCursor`.
2429             if (hostName != null) {
2430                 while (hostName.contains(".") && !domainSettingsApplied) {  // Stop checking if we run out of  `.` or if we already know that `domainSettingsApplied` is `true`.
2431                     if (domainSettingsSet.contains("*." + hostName)) {  // Check the host name prepended by `*.`.
2432                         domainSettingsApplied = true;
2433                         domainNameInDatabase = "*." + hostName;
2434                     }
2435
2436                     // Strip out the lowest subdomain of `host`.
2437                     hostName = hostName.substring(hostName.indexOf(".") + 1);
2438                 }
2439             }
2440
2441             // Get a handle for the shared preference.  `this` references the current context.
2442             SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
2443
2444             if (domainSettingsApplied) {  // The url we are loading has custom domain settings.
2445                 // Get a cursor for the current host and move it to the first position.
2446                 Cursor currentHostDomainSettingsCursor = domainsDatabaseHelper.getCursorForDomainName(domainNameInDatabase);
2447                 currentHostDomainSettingsCursor.moveToFirst();
2448
2449                 // Get the settings from the cursor.
2450                 javaScriptEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_JAVASCRIPT)) == 1);
2451                 firstPartyCookiesEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FIRST_PARTY_COOKIES)) == 1);
2452                 thirdPartyCookiesEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_THIRD_PARTY_COOKIES)) == 1);
2453                 domStorageEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_DOM_STORAGE)) == 1);
2454                 saveFormDataEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FORM_DATA)) == 1);
2455                 String userAgentString = currentHostDomainSettingsCursor.getString(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.USER_AGENT));
2456                 int fontSize = currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.FONT_SIZE));
2457                 displayWebpageImagesInt = currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.DISPLAY_IMAGES));
2458
2459                 // Close `currentHostDomainSettingsCursor`.
2460                 currentHostDomainSettingsCursor.close();
2461
2462                 // Apply the domain settings.
2463                 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
2464                 cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
2465                 mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
2466                 mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
2467                 mainWebView.getSettings().setTextZoom(fontSize);
2468
2469                 // Set third-party cookies status if API >= 21.
2470                 if (Build.VERSION.SDK_INT >= 21) {
2471                     cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
2472                 }
2473
2474                 // Set the user agent.
2475                 if (userAgentString.equals("WebView default user agent")) {
2476                     // Set the user agent to `""`, which uses the default value.
2477                     mainWebView.getSettings().setUserAgentString("");
2478                 } else {
2479                     // Use the selected user agent.
2480                     mainWebView.getSettings().setUserAgentString(userAgentString);
2481                 }
2482
2483                 // 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.
2484                 if (darkTheme) {
2485                     urlAppBarRelativeLayout.setBackground(getResources().getDrawable(R.drawable.url_bar_background_dark_blue));
2486                 } else {
2487                     urlAppBarRelativeLayout.setBackground(getResources().getDrawable(R.drawable.url_bar_background_light_green));
2488                 }
2489             } else {  // The URL we are loading does not have custom domain settings.  Load the defaults.
2490                 // Store the values from `sharedPreferences` in variables.
2491                 javaScriptEnabled = sharedPreferences.getBoolean("javascript_enabled", false);
2492                 firstPartyCookiesEnabled = sharedPreferences.getBoolean("first_party_cookies_enabled", false);
2493                 thirdPartyCookiesEnabled = sharedPreferences.getBoolean("third_party_cookies_enabled", false);
2494                 domStorageEnabled = sharedPreferences.getBoolean("dom_storage_enabled", false);
2495                 saveFormDataEnabled = sharedPreferences.getBoolean("save_form_data_enabled", false);
2496                 String userAgentString = sharedPreferences.getString("user_agent", "PrivacyBrowser/1.0");
2497                 String customUserAgentString = sharedPreferences.getString("custom_user_agent", "PrivacyBrowser/1.0");
2498                 String defaultFontSizeString = sharedPreferences.getString("default_font_size", "100");
2499
2500                 // Apply the default settings.
2501                 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
2502                 cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
2503                 mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
2504                 mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
2505                 mainWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
2506
2507                 // Set third-party cookies status if API >= 21.
2508                 if (Build.VERSION.SDK_INT >= 21) {
2509                     cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
2510                 }
2511
2512                 // Set the default user agent.
2513                 switch (userAgentString) {
2514                     case "WebView default user agent":
2515                         // Set the user agent to `""`, which uses the default value.
2516                         mainWebView.getSettings().setUserAgentString("");
2517                         break;
2518
2519                     case "Custom user agent":
2520                         // Set the custom user agent.
2521                         mainWebView.getSettings().setUserAgentString(customUserAgentString);
2522                         break;
2523
2524                     default:
2525                         // Use the selected user agent.
2526                         mainWebView.getSettings().setUserAgentString(userAgentString);
2527                         break;
2528                 }
2529
2530                 // Set a transparent background on `urlTextBox`.  We have to use the deprecated `.getDrawable()` until the minimum API >= 21.
2531                 urlAppBarRelativeLayout.setBackgroundDrawable(getResources().getDrawable(R.drawable.url_bar_background_transparent));
2532             }
2533
2534             // Close `domainsDatabaseHelper`.
2535             domainsDatabaseHelper.close();
2536
2537             // Remove the `onTheFlyDisplayImagesSet` flag and set the display webpage images mode.  `true` indicates that custom domain settings are applied.
2538             onTheFlyDisplayImagesSet = false;
2539             setDisplayWebpageImages();
2540
2541             // Update the privacy icons, but only if `mainMenu` has already been populated.
2542             if (mainMenu != null) {
2543                 updatePrivacyIcons(true);
2544             }
2545         }
2546     }
2547
2548     private void setDisplayWebpageImages() {
2549         if (!onTheFlyDisplayImagesSet) {
2550             if (domainSettingsApplied) {  // Custom domain settings are applied.
2551                 switch (displayWebpageImagesInt) {
2552                     case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_SYSTEM_DEFAULT:
2553                         mainWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImagesBoolean);
2554                         break;
2555
2556                     case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_ENABLED:
2557                         mainWebView.getSettings().setLoadsImagesAutomatically(true);
2558                         break;
2559
2560                     case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_DISABLED:
2561                         mainWebView.getSettings().setLoadsImagesAutomatically(false);
2562                         break;
2563                 }
2564             } else {  // Default settings are applied.
2565                 mainWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImagesBoolean);
2566             }
2567         }
2568     }
2569
2570     private void updatePrivacyIcons(boolean runInvalidateOptionsMenu) {
2571         // Get handles for the icons.
2572         MenuItem privacyIconMenuItem = mainMenu.findItem(R.id.toggle_javascript);
2573         MenuItem firstPartyCookiesIconMenuItem = mainMenu.findItem(R.id.toggle_first_party_cookies);
2574         MenuItem domStorageIconMenuItem = mainMenu.findItem(R.id.toggle_dom_storage);
2575         MenuItem formDataIconMenuItem = mainMenu.findItem(R.id.toggle_save_form_data);
2576
2577         // Update `privacyIcon`.
2578         if (javaScriptEnabled) {  // JavaScript is enabled.
2579             privacyIconMenuItem.setIcon(R.drawable.javascript_enabled);
2580         } else if (firstPartyCookiesEnabled) {  // JavaScript is disabled but cookies are enabled.
2581             privacyIconMenuItem.setIcon(R.drawable.warning);
2582         } else {  // All the dangerous features are disabled.
2583             privacyIconMenuItem.setIcon(R.drawable.privacy_mode);
2584         }
2585
2586         // Update `firstPartyCookiesIcon`.
2587         if (firstPartyCookiesEnabled) {  // First-party cookies are enabled.
2588             firstPartyCookiesIconMenuItem.setIcon(R.drawable.cookies_enabled);
2589         } else {  // First-party cookies are disabled.
2590             firstPartyCookiesIconMenuItem.setIcon(R.drawable.cookies_disabled);
2591         }
2592
2593         // Update `domStorageIcon`.
2594         if (javaScriptEnabled && domStorageEnabled) {  // Both JavaScript and DOM storage are enabled.
2595             domStorageIconMenuItem.setIcon(R.drawable.dom_storage_enabled);
2596         } else if (javaScriptEnabled) {  // JavaScript is enabled but DOM storage is disabled.
2597             domStorageIconMenuItem.setIcon(R.drawable.dom_storage_disabled);
2598         } else {  // JavaScript is disabled, so DOM storage is ghosted.
2599             domStorageIconMenuItem.setIcon(R.drawable.dom_storage_ghosted);
2600         }
2601
2602         // Update `formDataIcon`.
2603         if (saveFormDataEnabled) {  // Form data is enabled.
2604             formDataIconMenuItem.setIcon(R.drawable.form_data_enabled);
2605         } else {  // Form data is disabled.
2606             formDataIconMenuItem.setIcon(R.drawable.form_data_disabled);
2607         }
2608
2609         // `invalidateOptionsMenu` calls `onPrepareOptionsMenu()` and redraws the icons in the `AppBar`.  `this` references the current activity.
2610         if (runInvalidateOptionsMenu) {
2611             ActivityCompat.invalidateOptionsMenu(this);
2612         }
2613     }
2614
2615     private void highlightUrlText() {
2616         String urlString = urlTextBox.getText().toString();
2617
2618         if (urlString.startsWith("http://")) {  // Highlight connections that are not encrypted.
2619             urlTextBox.getText().setSpan(redColorSpan, 0, 7, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2620             urlTextBox.getText().setSpan(boldStyleSpan, 0, 7, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2621         } else if (urlString.startsWith("https://")) {  // Highlight connections that are encrypted.
2622             urlTextBox.getText().setSpan(initialGrayColorSpan, 0, 8, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2623         }
2624
2625         // Get the index of the `/` immediately after the domain name.
2626         int endOfDomainName = urlString.indexOf("/", (urlString.indexOf("//") + 2));
2627
2628         // De-emphasize the text after the domain name.
2629         if (endOfDomainName > 0) {
2630             urlTextBox.getText().setSpan(finalGrayColorSpan, endOfDomainName, urlString.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2631         }
2632     }
2633 }