0012898ea356cd37134245b33cf059126bee7e09
[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     // `darkTheme` is public static so it can be accessed from `AboutActivity` and `GuideActivity`.  It is also used in `onCreate()`, `applyAppSettings()`, and `applyDomainSettings()`.
126     public static boolean darkTheme;
127
128     // `favoriteIconBitmap` is public static so it can be accessed from `CreateHomeScreenShortcutDialog`, `BookmarksActivity`, `CreateBookmarkDialog`, `CreateBookmarkFolderDialog`, `EditBookmarkDialog`, `EditBookmarkFolderDialog`, `ViewSslCertificateDialog`.
129     // It is also used in `onCreate()`, `onCreateHomeScreenShortcutCreate()`, and `applyDomainSettings`.
130     public static Bitmap favoriteIconBitmap;
131
132     // `formattedUrlString` is public static so it can be accessed from `BookmarksActivity`, `CreateBookmarkDialog`, and `AddDomainDialog`.
133     // It is also used in `onCreate()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onCreateHomeScreenShortcutCreate()`, and `loadUrlFromTextBox()`.
134     public static String formattedUrlString;
135
136     // `sslCertificate` is public static so it can be accessed from `ViewSslCertificateDialog`.  It is also used in `onCreate()`.
137     public static SslCertificate sslCertificate;
138
139     // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()`.
140     public static String orbotStatus;
141
142     // `webViewTitle` is public static so it can be accessed from `CreateBookmarkDialog` and `CreateHomeScreenShortcutDialog`.  It is also used in `onCreate()`.
143     public static String webViewTitle;
144
145     // `displayWebpageImagesBoolean` is public static so it can be accessed from `DomainSettingsFragment`.  It is also used in `applyAppSettings()` and `applyDomainSettings()`.
146     public static boolean displayWebpageImagesBoolean;
147
148     // `reloadOnRestartBoolean` is public static so it can be accessed from `SettingsFragment`.  It is also used in `onRestart()`
149     public static boolean reloadOnRestartBoolean;
150
151
152     // `appBar` is used in `onCreate()`, `onOptionsItemSelected()`, `closeFindOnPage()`, and `applyAppSettings()`.
153     private ActionBar appBar;
154
155     // `navigatingHistory` is used in `onCreate()`, `onNavigationItemSelected()`, and `applyDomainSettings()`.
156     private boolean navigatingHistory;
157
158     // `favoriteIconDefaultBitmap` is used in `onCreate()` and `applyDomainSettings`.
159     private Bitmap favoriteIconDefaultBitmap;
160
161     // `drawerLayout` is used in `onCreate()`, `onNewIntent()`, and `onBackPressed()`.
162     private DrawerLayout drawerLayout;
163
164     // `rootCoordinatorLayout` is used in `onCreate()` and `applyAppSettings()`.
165     private CoordinatorLayout rootCoordinatorLayout;
166
167     // `mainWebView` is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`, `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`
168     // and `setDisplayWebpageImages()`.
169     private WebView mainWebView;
170
171     // `fullScreenVideoFrameLayout` is used in `onCreate()` and `onConfigurationChanged()`.
172     private FrameLayout fullScreenVideoFrameLayout;
173
174     // `swipeRefreshLayout` is used in `onCreate()`, `onPrepareOptionsMenu`, and `onRestart()`.
175     private SwipeRefreshLayout swipeRefreshLayout;
176
177     // `urlAppBarRelativeLayout` is used in `onCreate()` and `applyDomainSettings()`.
178     private RelativeLayout urlAppBarRelativeLayout;
179
180     // `favoriteIconImageView` is used in `onCreate()` and `applyDomainSettings()`
181     private ImageView favoriteIconImageView;
182
183     // `cookieManager` is used in `onCreate()`, `onOptionsItemSelected()`, and `onNavigationItemSelected()`, `loadUrlFromTextBox()`, `onDownloadImage()`, `onDownloadFile()`, and `onRestart()`.
184     private CookieManager cookieManager;
185
186     // `customHeader` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateContextMenu()`, and `loadUrl()`.
187     private final Map<String, String> customHeaders = new HashMap<>();
188
189     // `javaScriptEnabled` is also used in `onCreate()`, `onCreateOptionsMenu()`, `onOptionsItemSelected()`, `loadUrlFromTextBox()`, and `applyAppSettings()`.
190     // It is `Boolean` instead of `boolean` because `applyAppSettings()` needs to know if it is `null`.
191     private Boolean javaScriptEnabled;
192
193     // `firstPartyCookiesEnabled` is used in `onCreate()`, `onCreateOptionsMenu()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onDownloadImage()`, `onDownloadFile()`, and `applyAppSettings()`.
194     private boolean firstPartyCookiesEnabled;
195
196     // `thirdPartyCookiesEnabled` used in `onCreate()`, `onCreateOptionsMenu()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
197     private boolean thirdPartyCookiesEnabled;
198
199     // `domStorageEnabled` is used in `onCreate()`, `onCreateOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
200     private boolean domStorageEnabled;
201
202     // `saveFormDataEnabled` is used in `onCreate()`, `onCreateOptionsMenu()`, `onOptionsItemSelected()`, and `applyAppSettings()`.
203     private boolean saveFormDataEnabled;
204
205     // `swipeToRefreshEnabled` is used in `onPrepareOptionsMenu()` and `applyAppSettings()`.
206     private boolean swipeToRefreshEnabled;
207
208     // 'homepage' is used in `onCreate()`, `onNavigationItemSelected()`, and `applyAppSettings()`.
209     private String homepage;
210
211     // `searchURL` is used in `loadURLFromTextBox()` and `applyAppSettings()`.
212     private String searchURL;
213
214     // `adBlockerEnabled` is used in `onCreate()` and `applyAppSettings()`.
215     private boolean adBlockerEnabled;
216
217     // `privacyBrowserRuntime` is used in `onCreate()` and `applyAppSettings()`.
218     private Runtime privacyBrowserRuntime;
219
220     // `incognitoModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
221     private boolean incognitoModeEnabled;
222
223     // `fullScreenBrowsingModeEnabled` is used in `onCreate()` and `applyAppSettings()`.
224     private boolean fullScreenBrowsingModeEnabled;
225
226     // `inFullScreenBrowsingMode` is used in `onCreate()`, `onConfigurationChanged()`, and `applyAppSettings()`.
227     private boolean inFullScreenBrowsingMode;
228
229     // `hideSystemBarsOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
230     private boolean hideSystemBarsOnFullscreen;
231
232     // `translucentNavigationBarOnFullscreen` is used in `onCreate()` and `applyAppSettings()`.
233     private boolean translucentNavigationBarOnFullscreen;
234
235     // `currentDomainName` is used in `onCreate()`, `onNavigationItemSelected()`, and `applyDomainSettings()`.
236     private String currentDomainName;
237
238     // `waitingForOrbot` is used in `onCreate()` and `applyAppSettings()`.
239     private boolean waitingForOrbot;
240
241     // `domainSettingsApplied` is used in `applyDomainSettings()` and `setDisplayWebpageImages()`.
242     private boolean domainSettingsApplied;
243
244     // `displayWebpageImagesInt` is used in `applyDomainSettings()` and `setDisplayWebpageImages()`.
245     private int displayWebpageImagesInt;
246
247     // `onTheFlyDisplayImagesSet` is used in `applyDomainSettings()` and `setDisplayWebpageImages()`.
248     private boolean onTheFlyDisplayImagesSet;
249
250     // `waitingForOrbotData` is used in `onCreate()` and `applyAppSettings()`.
251     private String waitingForOrbotHTMLString;
252
253     // `privateDataDirectoryString` is used in `onCreate()` and `onNavigationItemSelected()`.
254     private String privateDataDirectoryString;
255
256     // `findOnPageLinearLayout` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
257     private LinearLayout findOnPageLinearLayout;
258
259     // `findOnPageEditText` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
260     private EditText findOnPageEditText;
261
262     // `mainMenu` is used in `onCreateOptionsMenu()` and `updatePrivacyIcons()`.
263     private Menu mainMenu;
264
265     // `drawerToggle` is used in `onCreate()`, `onPostCreate()`, `onConfigurationChanged()`, `onNewIntent()`, and `onNavigationItemSelected()`.
266     private ActionBarDrawerToggle drawerToggle;
267
268     // `supportAppBar` is used in `onCreate()`, `onOptionsItemSelected()`, and `closeFindOnPage()`.
269     private Toolbar supportAppBar;
270
271     // `urlTextBox` is used in `onCreate()`, `onOptionsItemSelected()`, `loadUrlFromTextBox()`, `loadUrl()`, and `highlightUrlText()`.
272     private EditText urlTextBox;
273
274     // `redColorSpan` is used in `onCreate()` and `highlightUrlText()`.
275     private ForegroundColorSpan redColorSpan;
276
277     // `initialGrayColorSpan` is sued in `onCreate()` and `highlightUrlText()`.
278     private ForegroundColorSpan initialGrayColorSpan;
279
280     // `finalGrayColorSpam` is used in `onCreate()` and `highlightUrlText()`.
281     private ForegroundColorSpan finalGrayColorSpan;
282
283     // `boldStyleSpan` is used in `onCreate()` and `highlightUrlText()`.
284     private StyleSpan boldStyleSpan;
285
286     // `adView` is used in `onCreate()` and `onConfigurationChanged()`.
287     private View adView;
288
289     // `sslErrorHandler` is used in `onCreate()`, `onSslErrorCancel()`, and `onSslErrorProceed`.
290     private SslErrorHandler sslErrorHandler;
291
292     // `inputMethodManager` is used in `onOptionsItemSelected()`, `loadUrlFromTextBox()`, and `closeFindOnPage()`.
293     private InputMethodManager inputMethodManager;
294
295     // `mainWebViewRelativeLayout` is used in `onCreate()` and `onNavigationItemSelected()`.
296     private RelativeLayout mainWebViewRelativeLayout;
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         // Get handles for the menu items.
1109         MenuItem toggleFirstPartyCookiesMenuItem = menu.findItem(R.id.toggle_first_party_cookies);
1110         MenuItem toggleThirdPartyCookiesMenuItem = menu.findItem(R.id.toggle_third_party_cookies);
1111         MenuItem toggleDomStorageMenuItem = menu.findItem(R.id.toggle_dom_storage);
1112         MenuItem toggleSaveFormDataMenuItem = menu.findItem(R.id.toggle_save_form_data);
1113         MenuItem clearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
1114         MenuItem clearFormDataMenuItem = menu.findItem(R.id.clear_form_data);
1115         MenuItem fontSizeMenuItem = menu.findItem(R.id.font_size);
1116         MenuItem displayImagesMenuItem = menu.findItem(R.id.display_images);
1117         MenuItem refreshMenuItem = menu.findItem(R.id.refresh);
1118
1119         // Set the status of the menu item checkboxes.
1120         toggleFirstPartyCookiesMenuItem.setChecked(firstPartyCookiesEnabled);
1121         toggleThirdPartyCookiesMenuItem.setChecked(thirdPartyCookiesEnabled);
1122         toggleDomStorageMenuItem.setChecked(domStorageEnabled);
1123         toggleSaveFormDataMenuItem.setChecked(saveFormDataEnabled);
1124         displayImagesMenuItem.setChecked(mainWebView.getSettings().getLoadsImagesAutomatically());
1125
1126         // Enable third-party cookies if first-party cookies are enabled.
1127         toggleThirdPartyCookiesMenuItem.setEnabled(firstPartyCookiesEnabled);
1128
1129         // Enable DOM Storage if JavaScript is enabled.
1130         toggleDomStorageMenuItem.setEnabled(javaScriptEnabled);
1131
1132         // Enable Clear Cookies if there are any.
1133         clearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
1134
1135         // Enable Clear Form Data is there is any.
1136         WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(this);
1137         clearFormDataMenuItem.setEnabled(mainWebViewDatabase.hasFormData());
1138
1139         // Initialize font size variables.
1140         int fontSize = mainWebView.getSettings().getTextZoom();
1141         String fontSizeTitle;
1142         MenuItem selectedFontSizeMenuItem;
1143
1144         // Prepare the font size title and current size menu item.
1145         switch (fontSize) {
1146             case 25:
1147                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.twenty_five_percent);
1148                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_twenty_five_percent);
1149                 break;
1150
1151             case 50:
1152                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.fifty_percent);
1153                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_fifty_percent);
1154                 break;
1155
1156             case 75:
1157                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.seventy_five_percent);
1158                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_seventy_five_percent);
1159                 break;
1160
1161             case 100:
1162                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.one_hundred_percent);
1163                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
1164                 break;
1165
1166             case 125:
1167                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.one_hundred_twenty_five_percent);
1168                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_twenty_five_percent);
1169                 break;
1170
1171             case 150:
1172                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.one_hundred_fifty_percent);
1173                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_fifty_percent);
1174                 break;
1175
1176             case 175:
1177                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.one_hundred_seventy_five_percent);
1178                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_seventy_five_percent);
1179                 break;
1180
1181             case 200:
1182                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.two_hundred_percent);
1183                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_two_hundred_percent);
1184                 break;
1185
1186             default:
1187                 fontSizeTitle = getResources().getString(R.string.font_size) + " - " + getResources().getString(R.string.one_hundred_percent);
1188                 selectedFontSizeMenuItem = menu.findItem(R.id.font_size_one_hundred_percent);
1189                 break;
1190         }
1191
1192         // Set the font size title and select the current size menu item.
1193         fontSizeMenuItem.setTitle(fontSizeTitle);
1194         selectedFontSizeMenuItem.setChecked(true);
1195
1196         // Only show `Refresh` if `swipeToRefresh` is disabled.
1197         refreshMenuItem.setVisible(!swipeToRefreshEnabled);
1198
1199         // Run all the other default commands.
1200         super.onPrepareOptionsMenu(menu);
1201
1202         // `return true` displays the menu.
1203         return true;
1204     }
1205
1206     @Override
1207     // Remove Android Studio's warning about the dangers of using SetJavaScriptEnabled.
1208     @SuppressLint("SetJavaScriptEnabled")
1209     // removeAllCookies is deprecated, but it is required for API < 21.
1210     @SuppressWarnings("deprecation")
1211     public boolean onOptionsItemSelected(MenuItem menuItem) {
1212         int menuItemId = menuItem.getItemId();
1213
1214         // Set the commands that relate to the menu entries.
1215         switch (menuItemId) {
1216             case R.id.toggle_javascript:
1217                 // Switch the status of javaScriptEnabled.
1218                 javaScriptEnabled = !javaScriptEnabled;
1219
1220                 // Apply the new JavaScript status.
1221                 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
1222
1223                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1224                 updatePrivacyIcons(true);
1225
1226                 // Display a `Snackbar`.
1227                 if (javaScriptEnabled) {  // JavaScrip is enabled.
1228                     Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
1229                 } else if (firstPartyCookiesEnabled) {  // JavaScript is disabled, but first-party cookies are enabled.
1230                     Snackbar.make(findViewById(R.id.main_webview), R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
1231                 } else {  // Privacy mode.
1232                     Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
1233                 }
1234
1235                 // Reload the WebView.
1236                 mainWebView.reload();
1237                 return true;
1238
1239             case R.id.toggle_first_party_cookies:
1240                 // Switch the status of firstPartyCookiesEnabled.
1241                 firstPartyCookiesEnabled = !firstPartyCookiesEnabled;
1242
1243                 // Update the menu checkbox.
1244                 menuItem.setChecked(firstPartyCookiesEnabled);
1245
1246                 // Apply the new cookie status.
1247                 cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
1248
1249                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1250                 updatePrivacyIcons(true);
1251
1252                 // Display a `Snackbar`.
1253                 if (firstPartyCookiesEnabled) {  // First-party cookies are enabled.
1254                     Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
1255                 } else if (javaScriptEnabled){  // JavaScript is still enabled.
1256                     Snackbar.make(findViewById(R.id.main_webview), R.string.first_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
1257                 } else {  // Privacy mode.
1258                     Snackbar.make(findViewById(R.id.main_webview), R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
1259                 }
1260
1261                 // Reload the WebView.
1262                 mainWebView.reload();
1263                 return true;
1264
1265             case R.id.toggle_third_party_cookies:
1266                 if (Build.VERSION.SDK_INT >= 21) {
1267                     // Switch the status of thirdPartyCookiesEnabled.
1268                     thirdPartyCookiesEnabled = !thirdPartyCookiesEnabled;
1269
1270                     // Update the menu checkbox.
1271                     menuItem.setChecked(thirdPartyCookiesEnabled);
1272
1273                     // Apply the new cookie status.
1274                     cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
1275
1276                     // Display a `Snackbar`.
1277                     if (thirdPartyCookiesEnabled) {
1278                         Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_enabled, Snackbar.LENGTH_SHORT).show();
1279                     } else {
1280                         Snackbar.make(findViewById(R.id.main_webview), R.string.third_party_cookies_disabled, Snackbar.LENGTH_SHORT).show();
1281                     }
1282
1283                     // Reload the WebView.
1284                     mainWebView.reload();
1285                 } // Else do nothing because SDK < 21.
1286                 return true;
1287
1288             case R.id.toggle_dom_storage:
1289                 // Switch the status of domStorageEnabled.
1290                 domStorageEnabled = !domStorageEnabled;
1291
1292                 // Update the menu checkbox.
1293                 menuItem.setChecked(domStorageEnabled);
1294
1295                 // Apply the new DOM Storage status.
1296                 mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
1297
1298                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1299                 updatePrivacyIcons(true);
1300
1301                 // Display a `Snackbar`.
1302                 if (domStorageEnabled) {
1303                     Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
1304                 } else {
1305                     Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
1306                 }
1307
1308                 // Reload the WebView.
1309                 mainWebView.reload();
1310                 return true;
1311
1312             case R.id.toggle_save_form_data:
1313                 // Switch the status of saveFormDataEnabled.
1314                 saveFormDataEnabled = !saveFormDataEnabled;
1315
1316                 // Update the menu checkbox.
1317                 menuItem.setChecked(saveFormDataEnabled);
1318
1319                 // Apply the new form data status.
1320                 mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
1321
1322                 // Display a `Snackbar`.
1323                 if (saveFormDataEnabled) {
1324                     Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
1325                 } else {
1326                     Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
1327                 }
1328
1329                 // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.
1330                 updatePrivacyIcons(true);
1331
1332                 // Reload the WebView.
1333                 mainWebView.reload();
1334                 return true;
1335
1336             case R.id.clear_cookies:
1337                 Snackbar.make(findViewById(R.id.main_webview), R.string.cookies_deleted, Snackbar.LENGTH_LONG)
1338                         .setAction(R.string.undo, new View.OnClickListener() {
1339                             @Override
1340                             public void onClick(View v) {
1341                                 // Do nothing because everything will be handled by `onDismissed()` below.
1342                             }
1343                         })
1344                         .addCallback(new Snackbar.Callback() {
1345                             @Override
1346                             public void onDismissed(Snackbar snackbar, int event) {
1347                                 switch (event) {
1348                                     // The user pushed the `Undo` button.
1349                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
1350                                         // Do nothing.
1351                                         break;
1352
1353                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
1354                                     default:
1355                                         // `cookieManager.removeAllCookie()` varies by SDK.
1356                                         if (Build.VERSION.SDK_INT < 21) {
1357                                             cookieManager.removeAllCookie();
1358                                         } else {
1359                                             // `null` indicates no callback.
1360                                             cookieManager.removeAllCookies(null);
1361                                         }
1362                                 }
1363                             }
1364                         })
1365                         .show();
1366                 return true;
1367
1368             case R.id.clear_dom_storage:
1369                 Snackbar.make(findViewById(R.id.main_webview), R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
1370                         .setAction(R.string.undo, new View.OnClickListener() {
1371                             @Override
1372                             public void onClick(View v) {
1373                                 // Do nothing because everything will be handled by `onDismissed()` below.
1374                             }
1375                         })
1376                         .addCallback(new Snackbar.Callback() {
1377                             @Override
1378                             public void onDismissed(Snackbar snackbar, int event) {
1379                                 switch (event) {
1380                                     // The user pushed the `Undo` button.
1381                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
1382                                         // Do nothing.
1383                                         break;
1384
1385                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
1386                                     default:
1387                                         // Delete the DOM Storage.
1388                                         WebStorage webStorage = WebStorage.getInstance();
1389                                         webStorage.deleteAllData();
1390                                 }
1391                             }
1392                         })
1393                         .show();
1394                 return true;
1395
1396             case R.id.clear_form_data:
1397                 Snackbar.make(findViewById(R.id.main_webview), R.string.form_data_deleted, Snackbar.LENGTH_LONG)
1398                         .setAction(R.string.undo, new View.OnClickListener() {
1399                             @Override
1400                             public void onClick(View v) {
1401                                 // Do nothing because everything will be handled by `onDismissed()` below.
1402                             }
1403                         })
1404                         .addCallback(new Snackbar.Callback() {
1405                             @Override
1406                             public void onDismissed(Snackbar snackbar, int event) {
1407                                 switch (event) {
1408                                     // The user pushed the `Undo` button.
1409                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
1410                                         // Do nothing.
1411                                         break;
1412
1413                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
1414                                     default:
1415                                         // Delete the form data.
1416                                         WebViewDatabase mainWebViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
1417                                         mainWebViewDatabase.clearFormData();
1418                                 }
1419                             }
1420                         })
1421                         .show();
1422                 return true;
1423
1424             case R.id.font_size_twenty_five_percent:
1425                 mainWebView.getSettings().setTextZoom(25);
1426                 return true;
1427
1428             case R.id.font_size_fifty_percent:
1429                 mainWebView.getSettings().setTextZoom(50);
1430                 return true;
1431
1432             case R.id.font_size_seventy_five_percent:
1433                 mainWebView.getSettings().setTextZoom(75);
1434                 return true;
1435
1436             case R.id.font_size_one_hundred_percent:
1437                 mainWebView.getSettings().setTextZoom(100);
1438                 return true;
1439
1440             case R.id.font_size_one_hundred_twenty_five_percent:
1441                 mainWebView.getSettings().setTextZoom(125);
1442                 return true;
1443
1444             case R.id.font_size_one_hundred_fifty_percent:
1445                 mainWebView.getSettings().setTextZoom(150);
1446                 return true;
1447
1448             case R.id.font_size_one_hundred_seventy_five_percent:
1449                 mainWebView.getSettings().setTextZoom(175);
1450                 return true;
1451
1452             case R.id.font_size_two_hundred_percent:
1453                 mainWebView.getSettings().setTextZoom(200);
1454                 return true;
1455
1456             case R.id.display_images:
1457                 if (mainWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
1458                     mainWebView.getSettings().setLoadsImagesAutomatically(false);
1459                     mainWebView.reload();
1460                 } else {  // Images are not currently loaded automatically.
1461                     mainWebView.getSettings().setLoadsImagesAutomatically(true);
1462                 }
1463
1464                 // Set `onTheFlyDisplayImagesSet`.
1465                 onTheFlyDisplayImagesSet = true;
1466                 return true;
1467
1468             case R.id.share:
1469                 // Setup the share string.
1470                 String shareString;
1471                 if (webViewTitle != null) {
1472                     shareString = webViewTitle + " – " + urlTextBox.getText().toString();
1473                 } else {
1474                     shareString = urlTextBox.getText().toString();
1475                 }
1476
1477                 // Create the share intent.
1478                 Intent shareIntent = new Intent();
1479                 shareIntent.setAction(Intent.ACTION_SEND);
1480                 shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
1481                 shareIntent.setType("text/plain");
1482
1483                 // Make it so.
1484                 startActivity(Intent.createChooser(shareIntent, "Share URL"));
1485                 return true;
1486
1487             case R.id.find_on_page:
1488                 // Hide the URL app bar.
1489                 supportAppBar.setVisibility(View.GONE);
1490
1491                 // Show the Find on Page `RelativeLayout`.
1492                 findOnPageLinearLayout.setVisibility(View.VISIBLE);
1493
1494                 // Display the keyboard.  We have to wait 200 ms before running the command to work around a bug in Android.
1495                 // http://stackoverflow.com/questions/5520085/android-show-softkeyboard-with-showsoftinput-is-not-working
1496                 findOnPageEditText.postDelayed(new Runnable()
1497                 {
1498                     @Override
1499                     public void run()
1500                     {
1501                         // Set the focus on `findOnPageEditText`.
1502                         findOnPageEditText.requestFocus();
1503
1504                         // Display the keyboard.
1505                         inputMethodManager.showSoftInput(findOnPageEditText, 0);
1506                     }
1507                 }, 200);
1508                 return true;
1509
1510             case R.id.print:
1511                 // Get a `PrintManager` instance.
1512                 PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
1513
1514                 // Convert `mainWebView` to `printDocumentAdapter`.
1515                 PrintDocumentAdapter printDocumentAdapter = mainWebView.createPrintDocumentAdapter();
1516
1517                 // Print the document.  The print attributes are `null`.
1518                 printManager.print(getResources().getString(R.string.privacy_browser_web_page), printDocumentAdapter, null);
1519                 return true;
1520
1521             case R.id.add_to_homescreen:
1522                 // Show the `CreateHomeScreenShortcutDialog` `AlertDialog` and name this instance `R.string.create_shortcut`.
1523                 AppCompatDialogFragment createHomeScreenShortcutDialogFragment = new CreateHomeScreenShortcutDialog();
1524                 createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getResources().getString(R.string.create_shortcut));
1525
1526                 //Everything else will be handled by `CreateHomeScreenShortcutDialog` and the associated listener below.
1527                 return true;
1528
1529             case R.id.refresh:
1530                 mainWebView.reload();
1531                 return true;
1532
1533             default:
1534                 // Don't consume the event.
1535                 return super.onOptionsItemSelected(menuItem);
1536         }
1537     }
1538
1539     // removeAllCookies is deprecated, but it is required for API < 21.
1540     @SuppressWarnings("deprecation")
1541     @Override
1542     public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
1543         int menuItemId = menuItem.getItemId();
1544
1545         switch (menuItemId) {
1546             case R.id.home:
1547                 loadUrl(homepage);
1548                 break;
1549
1550             case R.id.back:
1551                 if (mainWebView.canGoBack()) {
1552                     // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
1553                     navigatingHistory = true;
1554
1555                     // Load the previous website in the history.
1556                     mainWebView.goBack();
1557                 }
1558                 break;
1559
1560             case R.id.forward:
1561                 if (mainWebView.canGoForward()) {
1562                     // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
1563                     navigatingHistory = true;
1564
1565                     // Load the next website in the history.
1566                     mainWebView.goForward();
1567                 }
1568                 break;
1569
1570             case R.id.history:
1571                 // Get the `WebBackForwardList`.
1572                 WebBackForwardList webBackForwardList = mainWebView.copyBackForwardList();
1573
1574                 // Show the `UrlHistoryDialog` `AlertDialog` and name this instance `R.string.history`.  `this` is the `Context`.
1575                 AppCompatDialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(this, webBackForwardList);
1576                 urlHistoryDialogFragment.show(getSupportFragmentManager(), getResources().getString(R.string.history));
1577                 break;
1578
1579             case R.id.bookmarks:
1580                 // Launch BookmarksActivity.
1581                 Intent bookmarksIntent = new Intent(this, BookmarksActivity.class);
1582                 startActivity(bookmarksIntent);
1583                 break;
1584
1585             case R.id.downloads:
1586                 // Launch the system Download Manager.
1587                 Intent downloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
1588
1589                 // Launch as a new task so that Download Manager and Privacy Browser show as separate windows in the recent tasks list.
1590                 downloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1591
1592                 startActivity(downloadManagerIntent);
1593                 break;
1594
1595             case R.id.settings:
1596                 // Reset `currentDomainName` so that domain settings are reapplied after returning to `MainWebViewActivity`.
1597                 currentDomainName = "";
1598
1599                 // Launch `SettingsActivity`.
1600                 Intent settingsIntent = new Intent(this, SettingsActivity.class);
1601                 startActivity(settingsIntent);
1602                 break;
1603
1604             case R.id.domains:
1605                 // Reset `currentDomainName` so that domain settings are reapplied after returning to `MainWebViewActivity`.
1606                 currentDomainName = "";
1607
1608                 // Launch `DomainsActivity`.
1609                 Intent domainsIntent = new Intent(this, DomainsActivity.class);
1610                 startActivity(domainsIntent);
1611                 break;
1612
1613             case R.id.guide:
1614                 // Launch `GuideActivity`.
1615                 Intent guideIntent = new Intent(this, GuideActivity.class);
1616                 startActivity(guideIntent);
1617                 break;
1618
1619             case R.id.about:
1620                 // Launch `AboutActivity`.
1621                 Intent aboutIntent = new Intent(this, AboutActivity.class);
1622                 startActivity(aboutIntent);
1623                 break;
1624
1625             case R.id.clearAndExit:
1626                 // Get a handle for `sharedPreferences`.  `this` references the current context.
1627                 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
1628
1629                 boolean clearEverything = sharedPreferences.getBoolean("clear_everything", true);
1630
1631                 // Clear cookies.
1632                 if (clearEverything || sharedPreferences.getBoolean("clear_cookies", true)) {
1633                     // The command to remove cookies changed slightly in API 21.
1634                     if (Build.VERSION.SDK_INT >= 21) {
1635                         cookieManager.removeAllCookies(null);
1636                     } else {
1637                         cookieManager.removeAllCookie();
1638                     }
1639
1640                     // Manually delete the cookies database, as `CookieManager` sometimes will not flush its changes to disk before `System.exit(0)` is run.
1641                     try {
1642                         // We have to use two commands because `Runtime.exec()` does not like `*`.
1643                         privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies");
1644                         privacyBrowserRuntime.exec("rm -f " + privateDataDirectoryString + "/app_webview/Cookies-journal");
1645                     } catch (IOException e) {
1646                         // Do nothing if an error is thrown.
1647                     }
1648                 }
1649
1650                 // Clear DOM storage.
1651                 if (clearEverything || sharedPreferences.getBoolean("clear_dom_storage", true)) {
1652                     // Ask `WebStorage` to clear the DOM storage.
1653                     WebStorage webStorage = WebStorage.getInstance();
1654                     webStorage.deleteAllData();
1655
1656                     // Manually delete the DOM storage directory, as `WebStorage` sometimes will not flush its changes to disk before `System.exit(0)` is run.
1657                     try {
1658                         // We have to use a `String[]` because the directory contains a space and `Runtime.exec` will not escape the string correctly otherwise.
1659                         privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
1660                     } catch (IOException e) {
1661                         // Do nothing if an error is thrown.
1662                     }
1663                 }
1664
1665                 // Clear form data.
1666                 if (clearEverything || sharedPreferences.getBoolean("clear_form_data", true)) {
1667                     WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
1668                     webViewDatabase.clearFormData();
1669
1670                     // Manually delete the form data database, as `WebViewDatabase` sometimes will not flush its changes to disk before `System.exit(0)` is run.
1671                     try {
1672                         // We have to use a `String[]` because the database contains a space and `Runtime.exec` will not escape the string correctly otherwise.
1673                         privacyBrowserRuntime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data"});
1674                         privacyBrowserRuntime.exec(new String[] {"rm", "-f", privateDataDirectoryString + "/app_webview/Web Data-journal"});
1675                     } catch (IOException e) {
1676                         // Do nothing if an error is thrown.
1677                     }
1678                 }
1679
1680                 // Clear the cache.
1681                 if (clearEverything || sharedPreferences.getBoolean("clear_cache", true)) {
1682                     // `true` includes disk files.
1683                     mainWebView.clearCache(true);
1684
1685                     // Manually delete the cache directories.
1686                     try {
1687                         // Delete the main cache directory.
1688                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/cache");
1689
1690                         // 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.
1691                         privacyBrowserRuntime.exec(new String[] {"rm", "-rf", privateDataDirectoryString + "/app_webview/Service Worker/"});
1692                     } catch (IOException e) {
1693                         // Do nothing if an error is thrown.
1694                     }
1695                 }
1696
1697                 // Clear SSL certificate preferences.
1698                 mainWebView.clearSslPreferences();
1699
1700                 // Clear the back/forward history.
1701                 mainWebView.clearHistory();
1702
1703                 // Clear `formattedUrlString`.
1704                 formattedUrlString = null;
1705
1706                 // Clear `customHeaders`.
1707                 customHeaders.clear();
1708
1709                 // Detach all views from `mainWebViewRelativeLayout`.
1710                 mainWebViewRelativeLayout.removeAllViews();
1711
1712                 // Destroy the internal state of `mainWebView`.
1713                 mainWebView.destroy();
1714
1715                 // Manually delete the `app_webview` folder, which contains the cookies, DOM storage, form data, and `Service Worker` cache.
1716                 // See `https://code.google.com/p/android/issues/detail?id=233826&thanks=233826&ts=1486670530`.
1717                 if (clearEverything) {
1718                     try {
1719                         privacyBrowserRuntime.exec("rm -rf " + privateDataDirectoryString + "/app_webview");
1720                     } catch (IOException e) {
1721                         // Do nothing if an error is thrown.
1722                     }
1723                 }
1724
1725                 // Close Privacy Browser.  `finishAndRemoveTask` also removes Privacy Browser from the recent app list.
1726                 if (Build.VERSION.SDK_INT >= 21) {
1727                     finishAndRemoveTask();
1728                 } else {
1729                     finish();
1730                 }
1731
1732                 // Remove the terminated program from RAM.  The status code is `0`.
1733                 System.exit(0);
1734                 break;
1735         }
1736
1737         // Close the navigation drawer.
1738         drawerLayout.closeDrawer(GravityCompat.START);
1739         return true;
1740     }
1741
1742     @Override
1743     public void onPostCreate(Bundle savedInstanceState) {
1744         super.onPostCreate(savedInstanceState);
1745
1746         // Sync the state of the DrawerToggle after onRestoreInstanceState has finished.
1747         drawerToggle.syncState();
1748     }
1749
1750     @Override
1751     public void onConfigurationChanged(Configuration newConfig) {
1752         super.onConfigurationChanged(newConfig);
1753
1754         // Reload the ad for the free flavor if we are not in full screen mode.
1755         if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
1756             // Reload the ad.
1757             BannerAd.reloadAfterRotate(adView, getApplicationContext(), getString(R.string.ad_id));
1758
1759             // Reinitialize the `adView` variable, as the `View` will have been removed and re-added by `BannerAd.reloadAfterRotate()`.
1760             adView = findViewById(R.id.adview);
1761         }
1762
1763         // `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
1764         // ActivityCompat.invalidateOptionsMenu(this);
1765     }
1766
1767     @Override
1768     public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
1769         // Store the `HitTestResult`.
1770         final WebView.HitTestResult hitTestResult = mainWebView.getHitTestResult();
1771
1772         // Create strings.
1773         final String imageUrl;
1774         final String linkUrl;
1775
1776         // Get a handle for the `ClipboardManager`.
1777         final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
1778
1779         switch (hitTestResult.getType()) {
1780             // `SRC_ANCHOR_TYPE` is a link.
1781             case WebView.HitTestResult.SRC_ANCHOR_TYPE:
1782                 // Get the target URL.
1783                 linkUrl = hitTestResult.getExtra();
1784
1785                 // Set the target URL as the title of the `ContextMenu`.
1786                 menu.setHeaderTitle(linkUrl);
1787
1788                 // Add a `Load URL` entry.
1789                 menu.add(R.string.load_url).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1790                     @Override
1791                     public boolean onMenuItemClick(MenuItem item) {
1792                         loadUrl(linkUrl);
1793                         return false;
1794                     }
1795                 });
1796
1797                 // Add a `Copy URL` entry.
1798                 menu.add(R.string.copy_url).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1799                     @Override
1800                     public boolean onMenuItemClick(MenuItem item) {
1801                         // Save the link URL in a `ClipData`.
1802                         ClipData srcAnchorTypeClipData = ClipData.newPlainText(getResources().getString(R.string.url), linkUrl);
1803
1804                         // Set the `ClipData` as the clipboard's primary clip.
1805                         clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
1806                         return false;
1807                     }
1808                 });
1809
1810                 // Add a `Cancel` entry, which by default closes the `ContextMenu`.
1811                 menu.add(R.string.cancel);
1812                 break;
1813
1814             case WebView.HitTestResult.EMAIL_TYPE:
1815                 // Get the target URL.
1816                 linkUrl = hitTestResult.getExtra();
1817
1818                 // Set the target URL as the title of the `ContextMenu`.
1819                 menu.setHeaderTitle(linkUrl);
1820
1821                 // Add a `Write Email` entry.
1822                 menu.add(R.string.write_email).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1823                     @Override
1824                     public boolean onMenuItemClick(MenuItem item) {
1825                         // We use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
1826                         Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
1827
1828                         // Parse the url and set it as the data for the `Intent`.
1829                         emailIntent.setData(Uri.parse("mailto:" + linkUrl));
1830
1831                         // `FLAG_ACTIVITY_NEW_TASK` opens the email program in a new task instead as part of Privacy Browser.
1832                         emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1833
1834                         // Make it so.
1835                         startActivity(emailIntent);
1836                         return false;
1837                     }
1838                 });
1839
1840                 // Add a `Copy Email Address` entry.
1841                 menu.add(R.string.copy_email_address).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1842                     @Override
1843                     public boolean onMenuItemClick(MenuItem item) {
1844                         // Save the email address in a `ClipData`.
1845                         ClipData srcEmailTypeClipData = ClipData.newPlainText(getResources().getString(R.string.email_address), linkUrl);
1846
1847                         // Set the `ClipData` as the clipboard's primary clip.
1848                         clipboardManager.setPrimaryClip(srcEmailTypeClipData);
1849                         return false;
1850                     }
1851                 });
1852
1853                 // Add a `Cancel` entry, which by default closes the `ContextMenu`.
1854                 menu.add(R.string.cancel);
1855                 break;
1856
1857             // `IMAGE_TYPE` is an image.
1858             case WebView.HitTestResult.IMAGE_TYPE:
1859                 // Get the image URL.
1860                 imageUrl = hitTestResult.getExtra();
1861
1862                 // Set the image URL as the title of the `ContextMenu`.
1863                 menu.setHeaderTitle(imageUrl);
1864
1865                 // Add a `View Image` entry.
1866                 menu.add(R.string.view_image).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1867                     @Override
1868                     public boolean onMenuItemClick(MenuItem item) {
1869                         loadUrl(imageUrl);
1870                         return false;
1871                     }
1872                 });
1873
1874                 // Add a `Download Image` entry.
1875                 menu.add(R.string.download_image).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1876                     @Override
1877                     public boolean onMenuItemClick(MenuItem item) {
1878                         // Show the `DownloadImageDialog` `AlertDialog` and name this instance `@string/download`.
1879                         AppCompatDialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
1880                         downloadImageDialogFragment.show(getSupportFragmentManager(), getResources().getString(R.string.download));
1881                         return false;
1882                     }
1883                 });
1884
1885                 // Add a `Copy URL` entry.
1886                 menu.add(R.string.copy_url).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1887                     @Override
1888                     public boolean onMenuItemClick(MenuItem item) {
1889                         // Save the image URL in a `ClipData`.
1890                         ClipData srcImageTypeClipData = ClipData.newPlainText(getResources().getString(R.string.url), imageUrl);
1891
1892                         // Set the `ClipData` as the clipboard's primary clip.
1893                         clipboardManager.setPrimaryClip(srcImageTypeClipData);
1894                         return false;
1895                     }
1896                 });
1897
1898                 // Add a `Cancel` entry, which by default closes the `ContextMenu`.
1899                 menu.add(R.string.cancel);
1900                 break;
1901
1902
1903             // `SRC_IMAGE_ANCHOR_TYPE` is an image that is also a link.
1904             case WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE:
1905                 // Get the image URL.
1906                 imageUrl = hitTestResult.getExtra();
1907
1908                 // Set the image URL as the title of the `ContextMenu`.
1909                 menu.setHeaderTitle(imageUrl);
1910
1911                 // Add a `View Image` entry.
1912                 menu.add(R.string.view_image).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1913                     @Override
1914                     public boolean onMenuItemClick(MenuItem item) {
1915                         loadUrl(imageUrl);
1916                         return false;
1917                     }
1918                 });
1919
1920                 // Add a `Download Image` entry.
1921                 menu.add(R.string.download_image).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1922                     @Override
1923                     public boolean onMenuItemClick(MenuItem item) {
1924                         // Show the `DownloadImageDialog` `AlertDialog` and name this instance `@string/download`.
1925                         AppCompatDialogFragment downloadImageDialogFragment = DownloadImageDialog.imageUrl(imageUrl);
1926                         downloadImageDialogFragment.show(getSupportFragmentManager(), getResources().getString(R.string.download));
1927                         return false;
1928                     }
1929                 });
1930
1931                 // Add a `Copy URL` entry.
1932                 menu.add(R.string.copy_url).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
1933                     @Override
1934                     public boolean onMenuItemClick(MenuItem item) {
1935                         // Save the image URL in a `ClipData`.
1936                         ClipData srcImageAnchorTypeClipData = ClipData.newPlainText(getResources().getString(R.string.url), imageUrl);
1937
1938                         // Set the `ClipData` as the clipboard's primary clip.
1939                         clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
1940                         return false;
1941                     }
1942                 });
1943
1944                 // Add a `Cancel` entry, which by default closes the `ContextMenu`.
1945                 menu.add(R.string.cancel);
1946                 break;
1947         }
1948     }
1949
1950     @Override
1951     public void onCreateHomeScreenShortcut(AppCompatDialogFragment dialogFragment) {
1952         // Get shortcutNameEditText from the alert dialog.
1953         EditText shortcutNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.shortcut_name_edittext);
1954
1955         // Create the bookmark shortcut based on formattedUrlString.
1956         Intent bookmarkShortcut = new Intent();
1957         bookmarkShortcut.setAction(Intent.ACTION_VIEW);
1958         bookmarkShortcut.setData(Uri.parse(formattedUrlString));
1959
1960         // Place the bookmark shortcut on the home screen.
1961         Intent placeBookmarkShortcut = new Intent();
1962         placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.INTENT", bookmarkShortcut);
1963         placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.NAME", shortcutNameEditText.getText().toString());
1964         placeBookmarkShortcut.putExtra("android.intent.extra.shortcut.ICON", favoriteIconBitmap);
1965         placeBookmarkShortcut.setAction("com.android.launcher.action.INSTALL_SHORTCUT");
1966         sendBroadcast(placeBookmarkShortcut);
1967     }
1968
1969     @Override
1970     public void onDownloadImage(AppCompatDialogFragment dialogFragment, String imageUrl) {
1971         // Download the image if it has an HTTP or HTTPS URI.
1972         if (imageUrl.startsWith("http")) {
1973             // Get a handle for the system `DOWNLOAD_SERVICE`.
1974             DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
1975
1976             // Parse `imageUrl`.
1977             DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(imageUrl));
1978
1979             // Pass cookies to download manager if cookies are enabled.  This is required to download images from websites that require a login.
1980             // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
1981             if (firstPartyCookiesEnabled) {
1982                 // Get the cookies for `imageUrl`.
1983                 String cookies = cookieManager.getCookie(imageUrl);
1984
1985                 // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
1986                 downloadRequest.addRequestHeader("Cookie", cookies);
1987             }
1988
1989             // Get the file name from `dialogFragment`.
1990             EditText downloadImageNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.download_image_name);
1991             String imageName = downloadImageNameEditText.getText().toString();
1992
1993             // Once we have `WRITE_EXTERNAL_STORAGE` permissions we can use `setDestinationInExternalPublicDir`.
1994             if (Build.VERSION.SDK_INT >= 23) { // If API >= 23, set the download save in the the `DIRECTORY_DOWNLOADS` using `imageName`.
1995                 downloadRequest.setDestinationInExternalFilesDir(this, "/", imageName);
1996             } else { // Only set the title using `imageName`.
1997                 downloadRequest.setTitle(imageName);
1998             }
1999
2000             // Allow `MediaScanner` to index the download if it is a media file.
2001             downloadRequest.allowScanningByMediaScanner();
2002
2003             // Add the URL as the description for the download.
2004             downloadRequest.setDescription(imageUrl);
2005
2006             // Show the download notification after the download is completed.
2007             downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
2008
2009             // Initiate the download.
2010             downloadManager.enqueue(downloadRequest);
2011         } else {  // The image is not an HTTP or HTTPS URI.
2012             Snackbar.make(mainWebView, R.string.cannot_download_image, Snackbar.LENGTH_INDEFINITE).show();
2013         }
2014     }
2015
2016     @Override
2017     public void onDownloadFile(AppCompatDialogFragment dialogFragment, String downloadUrl) {
2018         // Download the file if it has an HTTP or HTTPS URI.
2019         if (downloadUrl.startsWith("http")) {
2020
2021             // Get a handle for the system `DOWNLOAD_SERVICE`.
2022             DownloadManager downloadManager = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
2023
2024             // Parse `downloadUrl`.
2025             DownloadManager.Request downloadRequest = new DownloadManager.Request(Uri.parse(downloadUrl));
2026
2027             // Pass cookies to download manager if cookies are enabled.  This is required to download files from websites that require a login.
2028             // Code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
2029             if (firstPartyCookiesEnabled) {
2030                 // Get the cookies for `downloadUrl`.
2031                 String cookies = cookieManager.getCookie(downloadUrl);
2032
2033                 // Add the cookies to `downloadRequest`.  In the HTTP request header, cookies are named `Cookie`.
2034                 downloadRequest.addRequestHeader("Cookie", cookies);
2035             }
2036
2037             // Get the file name from `dialogFragment`.
2038             EditText downloadFileNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.download_file_name);
2039             String fileName = downloadFileNameEditText.getText().toString();
2040
2041             // Once we have `WRITE_EXTERNAL_STORAGE` permissions we can use `setDestinationInExternalPublicDir`.
2042             if (Build.VERSION.SDK_INT >= 23) { // If API >= 23, set the download location to `/sdcard/Android/data/com.stoutner.privacybrowser.standard/files` named `fileName`.
2043                 downloadRequest.setDestinationInExternalFilesDir(this, "/", fileName);
2044             } else { // Only set the title using `fileName`.
2045                 downloadRequest.setTitle(fileName);
2046             }
2047
2048             // Allow `MediaScanner` to index the download if it is a media file.
2049             downloadRequest.allowScanningByMediaScanner();
2050
2051             // Add the URL as the description for the download.
2052             downloadRequest.setDescription(downloadUrl);
2053
2054             // Show the download notification after the download is completed.
2055             downloadRequest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
2056
2057             // Initiate the download.
2058             downloadManager.enqueue(downloadRequest);
2059         } else {  // The download is not an HTTP or HTTPS URI.
2060             Snackbar.make(mainWebView, R.string.cannot_download_file, Snackbar.LENGTH_INDEFINITE).show();
2061         }
2062     }
2063
2064     public void viewSslCertificate(View view) {
2065         // Show the `ViewSslCertificateDialog` `AlertDialog` and name this instance `@string/view_ssl_certificate`.
2066         DialogFragment viewSslCertificateDialogFragment = new ViewSslCertificateDialog();
2067         viewSslCertificateDialogFragment.show(getFragmentManager(), getResources().getString(R.string.view_ssl_certificate));
2068     }
2069
2070     @Override
2071     public void onSslErrorCancel() {
2072         sslErrorHandler.cancel();
2073     }
2074
2075     @Override
2076     public void onSslErrorProceed() {
2077         sslErrorHandler.proceed();
2078     }
2079
2080     @Override
2081     public void onUrlHistoryEntrySelected(int moveBackOrForwardSteps) {
2082         // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
2083         navigatingHistory = true;
2084
2085         // Load the history entry.
2086         mainWebView.goBackOrForward(moveBackOrForwardSteps);
2087     }
2088
2089     @Override
2090     public void onClearHistory() {
2091         // Clear the history.
2092         mainWebView.clearHistory();
2093     }
2094
2095     // Override `onBackPressed` to handle the navigation drawer and `mainWebView`.
2096     @Override
2097     public void onBackPressed() {
2098         // Close the navigation drawer if it is available.  GravityCompat.START is the drawer on the left on Left-to-Right layout text.
2099         if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
2100             drawerLayout.closeDrawer(GravityCompat.START);
2101         } else {
2102             // Load the previous URL if available.
2103             if (mainWebView.canGoBack()) {
2104                 // Set `navigatingHistory` so that the domain settings are applied when the new URL is loaded.
2105                 navigatingHistory = true;
2106
2107                 // Go back.
2108                 mainWebView.goBack();
2109             } else {
2110                 // Pass `onBackPressed()` to the system.
2111                 super.onBackPressed();
2112             }
2113         }
2114     }
2115
2116     private void loadUrlFromTextBox() throws UnsupportedEncodingException {
2117         // Get the text from urlTextBox and convert it to a string.  trim() removes white spaces from the beginning and end of the string.
2118         String unformattedUrlString = urlTextBox.getText().toString().trim();
2119
2120         // Check to see if `unformattedUrlString` is a valid URL.  Otherwise, convert it into a search.
2121         if ((Patterns.WEB_URL.matcher(unformattedUrlString).matches()) || (unformattedUrlString.startsWith("http://")) || (unformattedUrlString.startsWith("https://"))) {
2122             // Add `http://` at the beginning if it is missing.  Otherwise the app will segfault.
2123             if (!unformattedUrlString.startsWith("http")) {
2124                 unformattedUrlString = "http://" + unformattedUrlString;
2125             }
2126
2127             // Initialize `unformattedUrl`.
2128             URL unformattedUrl = null;
2129
2130             // 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.
2131             try {
2132                 unformattedUrl = new URL(unformattedUrlString);
2133             } catch (MalformedURLException e) {
2134                 e.printStackTrace();
2135             }
2136
2137             // The ternary operator (? :) makes sure that a null pointer exception is not thrown, which would happen if `.get` was called on a `null` value.
2138             final String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null;
2139             final String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null;
2140             final String path = unformattedUrl != null ? unformattedUrl.getPath() : null;
2141             final String query = unformattedUrl != null ? unformattedUrl.getQuery() : null;
2142             final String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null;
2143
2144             // Build the URI.
2145             Uri.Builder formattedUri = new Uri.Builder();
2146             formattedUri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
2147
2148             // Decode `formattedUri` as a `String` in `UTF-8`.
2149             formattedUrlString = URLDecoder.decode(formattedUri.build().toString(), "UTF-8");
2150         } else {
2151             // Sanitize the search input and convert it to a search.
2152             final String encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
2153
2154             // Add the base search URL.
2155             formattedUrlString = searchURL + encodedUrlString;
2156         }
2157
2158         loadUrl(formattedUrlString);
2159
2160         // Hide the keyboard so we can see the webpage.  `0` indicates no additional flags.
2161         inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
2162     }
2163
2164
2165     private void loadUrl(String url) {
2166         // Apply any custom domain settings.
2167         applyDomainSettings(url);
2168
2169         // Load the URL.
2170         mainWebView.loadUrl(url, customHeaders);
2171     }
2172
2173     public void findPreviousOnPage(View view) {
2174         // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
2175         mainWebView.findNext(false);
2176     }
2177
2178     public void findNextOnPage(View view) {
2179         // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
2180         mainWebView.findNext(true);
2181     }
2182
2183     public void closeFindOnPage(View view) {
2184         // Delete the contents of `find_on_page_edittext`.
2185         findOnPageEditText.setText(null);
2186
2187         // Clear the highlighted phrases.
2188         mainWebView.clearMatches();
2189
2190         // Hide the Find on Page `RelativeLayout`.
2191         findOnPageLinearLayout.setVisibility(View.GONE);
2192
2193         // Show the URL app bar.
2194         supportAppBar.setVisibility(View.VISIBLE);
2195
2196         // Hide the keyboard so we can see the webpage.  `0` indicates no additional flags.
2197         inputMethodManager.hideSoftInputFromWindow(mainWebView.getWindowToken(), 0);
2198     }
2199
2200     private void applyAppSettings() {
2201         // Get a handle for `sharedPreferences`.  `this` references the current context.
2202         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
2203
2204         // Store the values from `sharedPreferences` in variables.
2205         String homepageString = sharedPreferences.getString("homepage", "https://start.duckduckgo.com");
2206         String torHomepageString = sharedPreferences.getString("tor_homepage", "https://3g2upl4pq6kufc4m.onion");
2207         String torSearchString = sharedPreferences.getString("tor_search", "https://3g2upl4pq6kufc4m.onion/html/?q=");
2208         String torSearchCustomURLString = sharedPreferences.getString("tor_search_custom_url", "");
2209         String searchString = sharedPreferences.getString("search", "https://duckduckgo.com/html/?q=");
2210         String searchCustomURLString = sharedPreferences.getString("search_custom_url", "");
2211         adBlockerEnabled = sharedPreferences.getBoolean("block_ads", true);
2212         incognitoModeEnabled = sharedPreferences.getBoolean("incognito_mode", false);
2213         boolean doNotTrackEnabled = sharedPreferences.getBoolean("do_not_track", false);
2214         boolean proxyThroughOrbot = sharedPreferences.getBoolean("proxy_through_orbot", false);
2215         fullScreenBrowsingModeEnabled = sharedPreferences.getBoolean("full_screen_browsing_mode", false);
2216         hideSystemBarsOnFullscreen = sharedPreferences.getBoolean("hide_system_bars", false);
2217         translucentNavigationBarOnFullscreen = sharedPreferences.getBoolean("translucent_navigation_bar", true);
2218         swipeToRefreshEnabled = sharedPreferences.getBoolean("swipe_to_refresh", false);
2219         displayWebpageImagesBoolean = sharedPreferences.getBoolean("display_webpage_images", true);
2220
2221         // Set the homepage, search, and proxy options.
2222         if (proxyThroughOrbot) {  // Set the Tor options.
2223             // Set `torHomepageString` as `homepage`.
2224             homepage = torHomepageString;
2225
2226             // If formattedUrlString is null assign the homepage to it.
2227             if (formattedUrlString == null) {
2228                 formattedUrlString = homepage;
2229             }
2230
2231             // Set the search URL.
2232             if (torSearchString.equals("Custom URL")) {  // Get the custom URL string.
2233                 searchURL = torSearchCustomURLString;
2234             } else {  // Use the string from the pre-built list.
2235                 searchURL = torSearchString;
2236             }
2237
2238             // Set the proxy.  `this` refers to the current activity where an `AlertDialog` might be displayed.
2239             OrbotProxyHelper.setProxy(getApplicationContext(), this, "localhost", "8118");
2240
2241             // Set the `appBar` background to indicate proxying through Orbot is enabled.  `this` refers to the context.
2242             if (darkTheme) {
2243                 appBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.dark_blue_30));
2244             } else {
2245                 appBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.blue_50));
2246             }
2247
2248             // Display a message to the user if we are waiting on Orbot.
2249             if (!orbotStatus.equals("ON")) {
2250                 // Set `waitingForOrbot`.
2251                 waitingForOrbot = true;
2252
2253                 // Load a waiting page.  `null` specifies no encoding, which defaults to ASCII.
2254                 mainWebView.loadData(waitingForOrbotHTMLString, "text/html", null);
2255             }
2256         } else {  // Set the non-Tor options.
2257             // Set `homepageString` as `homepage`.
2258             homepage = homepageString;
2259
2260             // If formattedUrlString is null assign the homepage to it.
2261             if (formattedUrlString == null) {
2262                 formattedUrlString = homepage;
2263             }
2264
2265             // Set the search URL.
2266             if (searchString.equals("Custom URL")) {  // Get the custom URL string.
2267                 searchURL = searchCustomURLString;
2268             } else {  // Use the string from the pre-built list.
2269                 searchURL = searchString;
2270             }
2271
2272             // Reset the proxy to default.  The host is `""` and the port is `"0"`.
2273             OrbotProxyHelper.setProxy(getApplicationContext(), this, "", "0");
2274
2275             // Set the default `appBar` background.  `this` refers to the context.
2276             if (darkTheme) {
2277                 appBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.gray_900));
2278             } else {
2279                 appBar.setBackgroundDrawable(ContextCompat.getDrawable(this, R.color.gray_100));
2280             }
2281
2282             // Reset `waitingForOrbot.
2283             waitingForOrbot = false;
2284         }
2285
2286         // Set swipe to refresh.
2287         swipeRefreshLayout.setEnabled(swipeToRefreshEnabled);
2288
2289         // Set Do Not Track status.
2290         if (doNotTrackEnabled) {
2291             customHeaders.put("DNT", "1");
2292         } else {
2293             customHeaders.remove("DNT");
2294         }
2295
2296         // Apply the appropriate full screen mode the `SYSTEM_UI` flags.
2297         if (fullScreenBrowsingModeEnabled && inFullScreenBrowsingMode) {
2298             if (hideSystemBarsOnFullscreen) {  // Hide everything.
2299                 // Remove the translucent navigation setting if it is currently flagged.
2300                 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
2301
2302                 // Remove the translucent status bar overlay.
2303                 getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
2304
2305                 // Remove the translucent status bar overlay on the `Drawer Layout`, which is special and needs its own command.
2306                 drawerLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
2307
2308                 /* SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
2309                  * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
2310                  * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically rehides them after they are shown.
2311                  */
2312                 rootCoordinatorLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
2313             } else {  // Hide everything except the status and navigation bars.
2314                 // Add the translucent status flag if it is unset.
2315                 getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
2316
2317                 if (translucentNavigationBarOnFullscreen) {
2318                     // Set the navigation bar to be translucent.
2319                     getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
2320                 } else {
2321                     // Set the navigation bar to be black.
2322                     getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
2323                 }
2324             }
2325         } else {  // Switch to normal viewing mode.
2326             // Reset `inFullScreenBrowsingMode` to `false`.
2327             inFullScreenBrowsingMode = false;
2328
2329             // Show the `appBar` if `findOnPageLinearLayout` is not visible.
2330             if (findOnPageLinearLayout.getVisibility() == View.GONE) {
2331                 appBar.show();
2332             }
2333
2334             // Show the `BannerAd` in the free flavor.
2335             if (BuildConfig.FLAVOR.contentEquals("free")) {
2336                 // Reload the ad.  Because the screen may have rotated, we need to use `reloadAfterRotate`.
2337                 BannerAd.reloadAfterRotate(adView, getApplicationContext(), getString(R.string.ad_id));
2338
2339                 // Reinitialize the `adView` variable, as the `View` will have been removed and re-added by `BannerAd.reloadAfterRotate()`.
2340                 adView = findViewById(R.id.adview);
2341             }
2342
2343             // Remove the translucent navigation bar flag if it is set.
2344             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);
2345
2346             // Add the translucent status flag if it is unset.  This also resets `drawerLayout's` `View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN`.
2347             getWindow().addFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
2348
2349             // Remove any `SYSTEM_UI` flags from `rootCoordinatorLayout`.
2350             rootCoordinatorLayout.setSystemUiVisibility(0);
2351
2352             // Constrain `rootCoordinatorLayout` inside the status and navigation bars.
2353             rootCoordinatorLayout.setFitsSystemWindows(true);
2354         }
2355     }
2356
2357     // We have to use the deprecated `.getDrawable()` until the minimum API >= 21.
2358     @SuppressWarnings("deprecation")
2359     private void applyDomainSettings(String url) {
2360         // Reset `navigatingHistory`.
2361         navigatingHistory = false;
2362
2363         // Parse the URL into a URI.
2364         Uri uri = Uri.parse(url);
2365
2366         // Extract the domain from `uri`.
2367         String hostName = uri.getHost();
2368
2369         // Initialize `loadingNewDomainName`.
2370         boolean loadingNewDomainName;
2371
2372         // If either `hostName` or `currentDomainName` are `null`, run the options for loading a new domain name.
2373         // The lint suggestion to simplify the `if` statement is incorrect, because `hostName.equals(currentDomainName)` can produce a `null object reference.`
2374         //noinspection SimplifiableIfStatement
2375         if ((hostName == null) || (currentDomainName == null)) {
2376             loadingNewDomainName = true;
2377         } else {  // Determine if `hostName` equals `currentDomainName`.
2378             loadingNewDomainName = !hostName.equals(currentDomainName);
2379         }
2380
2381         // 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.
2382         if (loadingNewDomainName) {
2383             // Set the new `hostname` as the `currentDomainName`.
2384             currentDomainName = hostName;
2385
2386             // Reset `favoriteIconBitmap` and display it in the `appbar`.
2387             favoriteIconBitmap = favoriteIconDefaultBitmap;
2388             favoriteIconImageView.setImageBitmap(Bitmap.createScaledBitmap(favoriteIconBitmap, 64, 64, true));
2389
2390             // Initialize the database handler.  `this` specifies the context.  The two `nulls` do not specify the database name or a `CursorFactory`.
2391             // The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
2392             DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
2393
2394             // Get a full cursor from `domainsDatabaseHelper`.
2395             Cursor domainNameCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
2396
2397             // Initialize `domainSettingsSet`.
2398             Set<String> domainSettingsSet = new HashSet<>();
2399
2400             // Get the domain name column index.
2401             int domainNameColumnIndex = domainNameCursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME);
2402
2403             // Populate `domainSettingsSet`.
2404             for (int i = 0; i < domainNameCursor.getCount(); i++) {
2405                 // Move `domainsCursor` to the current row.
2406                 domainNameCursor.moveToPosition(i);
2407
2408                 // Store the domain name in `domainSettingsSet`.
2409                 domainSettingsSet.add(domainNameCursor.getString(domainNameColumnIndex));
2410             }
2411
2412             // Close `domainNameCursor.
2413             domainNameCursor.close();
2414
2415             // Initialize variables to track if domain settings will be applied and, if so, under which name.
2416             domainSettingsApplied = false;
2417             String domainNameInDatabase = null;
2418
2419             // Check the hostname.
2420             if (domainSettingsSet.contains(hostName)) {
2421                 domainSettingsApplied = true;
2422                 domainNameInDatabase = hostName;
2423             }
2424
2425             // If `hostName` is not `null`, check all the subdomains of `hostName` against wildcard domains in `domainCursor`.
2426             if (hostName != null) {
2427                 while (hostName.contains(".") && !domainSettingsApplied) {  // Stop checking if we run out of  `.` or if we already know that `domainSettingsApplied` is `true`.
2428                     if (domainSettingsSet.contains("*." + hostName)) {  // Check the host name prepended by `*.`.
2429                         domainSettingsApplied = true;
2430                         domainNameInDatabase = "*." + hostName;
2431                     }
2432
2433                     // Strip out the lowest subdomain of `host`.
2434                     hostName = hostName.substring(hostName.indexOf(".") + 1);
2435                 }
2436             }
2437
2438             // Get a handle for the shared preference.  `this` references the current context.
2439             SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
2440
2441             if (domainSettingsApplied) {  // The url we are loading has custom domain settings.
2442                 // Get a cursor for the current host and move it to the first position.
2443                 Cursor currentHostDomainSettingsCursor = domainsDatabaseHelper.getCursorForDomainName(domainNameInDatabase);
2444                 currentHostDomainSettingsCursor.moveToFirst();
2445
2446                 // Get the settings from the cursor.
2447                 javaScriptEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_JAVASCRIPT)) == 1);
2448                 firstPartyCookiesEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FIRST_PARTY_COOKIES)) == 1);
2449                 thirdPartyCookiesEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_THIRD_PARTY_COOKIES)) == 1);
2450                 domStorageEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_DOM_STORAGE)) == 1);
2451                 saveFormDataEnabled = (currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.ENABLE_FORM_DATA)) == 1);
2452                 String userAgentString = currentHostDomainSettingsCursor.getString(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.USER_AGENT));
2453                 int fontSize = currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.FONT_SIZE));
2454                 displayWebpageImagesInt = currentHostDomainSettingsCursor.getInt(currentHostDomainSettingsCursor.getColumnIndex(DomainsDatabaseHelper.DISPLAY_IMAGES));
2455
2456                 // Close `currentHostDomainSettingsCursor`.
2457                 currentHostDomainSettingsCursor.close();
2458
2459                 // Apply the domain settings.
2460                 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
2461                 cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
2462                 mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
2463                 mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
2464                 mainWebView.getSettings().setTextZoom(fontSize);
2465
2466                 // Set third-party cookies status if API >= 21.
2467                 if (Build.VERSION.SDK_INT >= 21) {
2468                     cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
2469                 }
2470
2471                 // Set the user agent.
2472                 if (userAgentString.equals("WebView default user agent")) {
2473                     // Set the user agent to `""`, which uses the default value.
2474                     mainWebView.getSettings().setUserAgentString("");
2475                 } else {
2476                     // Use the selected user agent.
2477                     mainWebView.getSettings().setUserAgentString(userAgentString);
2478                 }
2479
2480                 // 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.
2481                 if (darkTheme) {
2482                     urlAppBarRelativeLayout.setBackground(getResources().getDrawable(R.drawable.url_bar_background_dark_blue));
2483                 } else {
2484                     urlAppBarRelativeLayout.setBackground(getResources().getDrawable(R.drawable.url_bar_background_light_green));
2485                 }
2486             } else {  // The URL we are loading does not have custom domain settings.  Load the defaults.
2487                 // Store the values from `sharedPreferences` in variables.
2488                 javaScriptEnabled = sharedPreferences.getBoolean("javascript_enabled", false);
2489                 firstPartyCookiesEnabled = sharedPreferences.getBoolean("first_party_cookies_enabled", false);
2490                 thirdPartyCookiesEnabled = sharedPreferences.getBoolean("third_party_cookies_enabled", false);
2491                 domStorageEnabled = sharedPreferences.getBoolean("dom_storage_enabled", false);
2492                 saveFormDataEnabled = sharedPreferences.getBoolean("save_form_data_enabled", false);
2493                 String userAgentString = sharedPreferences.getString("user_agent", "PrivacyBrowser/1.0");
2494                 String customUserAgentString = sharedPreferences.getString("custom_user_agent", "PrivacyBrowser/1.0");
2495                 String defaultFontSizeString = sharedPreferences.getString("default_font_size", "100");
2496
2497                 // Apply the default settings.
2498                 mainWebView.getSettings().setJavaScriptEnabled(javaScriptEnabled);
2499                 cookieManager.setAcceptCookie(firstPartyCookiesEnabled);
2500                 mainWebView.getSettings().setDomStorageEnabled(domStorageEnabled);
2501                 mainWebView.getSettings().setSaveFormData(saveFormDataEnabled);
2502                 mainWebView.getSettings().setTextZoom(Integer.valueOf(defaultFontSizeString));
2503
2504                 // Set third-party cookies status if API >= 21.
2505                 if (Build.VERSION.SDK_INT >= 21) {
2506                     cookieManager.setAcceptThirdPartyCookies(mainWebView, thirdPartyCookiesEnabled);
2507                 }
2508
2509                 // Set the default user agent.
2510                 switch (userAgentString) {
2511                     case "WebView default user agent":
2512                         // Set the user agent to `""`, which uses the default value.
2513                         mainWebView.getSettings().setUserAgentString("");
2514                         break;
2515
2516                     case "Custom user agent":
2517                         // Set the custom user agent.
2518                         mainWebView.getSettings().setUserAgentString(customUserAgentString);
2519                         break;
2520
2521                     default:
2522                         // Use the selected user agent.
2523                         mainWebView.getSettings().setUserAgentString(userAgentString);
2524                         break;
2525                 }
2526
2527                 // Set a transparent background on `urlTextBox`.  We have to use the deprecated `.getDrawable()` until the minimum API >= 21.
2528                 urlAppBarRelativeLayout.setBackgroundDrawable(getResources().getDrawable(R.drawable.url_bar_background_transparent));
2529             }
2530
2531             // Close `domainsDatabaseHelper`.
2532             domainsDatabaseHelper.close();
2533
2534             // Remove the `onTheFlyDisplayImagesSet` flag and set the display webpage images mode.  `true` indicates that custom domain settings are applied.
2535             onTheFlyDisplayImagesSet = false;
2536             setDisplayWebpageImages();
2537
2538             // Update the privacy icons, but only if `mainMenu` has already been populated.
2539             if (mainMenu != null) {
2540                 updatePrivacyIcons(true);
2541             }
2542         }
2543     }
2544
2545     private void setDisplayWebpageImages() {
2546         if (!onTheFlyDisplayImagesSet) {
2547             if (domainSettingsApplied) {  // Custom domain settings are applied.
2548                 switch (displayWebpageImagesInt) {
2549                     case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_SYSTEM_DEFAULT:
2550                         mainWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImagesBoolean);
2551                         break;
2552
2553                     case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_ENABLED:
2554                         mainWebView.getSettings().setLoadsImagesAutomatically(true);
2555                         break;
2556
2557                     case DomainsDatabaseHelper.DISPLAY_WEBPAGE_IMAGES_DISABLED:
2558                         mainWebView.getSettings().setLoadsImagesAutomatically(false);
2559                         break;
2560                 }
2561             } else {  // Default settings are applied.
2562                 mainWebView.getSettings().setLoadsImagesAutomatically(displayWebpageImagesBoolean);
2563             }
2564         }
2565     }
2566
2567     private void updatePrivacyIcons(boolean runInvalidateOptionsMenu) {
2568         // Get handles for the icons.
2569         MenuItem privacyIconMenuItem = mainMenu.findItem(R.id.toggle_javascript);
2570         MenuItem firstPartyCookiesIconMenuItem = mainMenu.findItem(R.id.toggle_first_party_cookies);
2571         MenuItem domStorageIconMenuItem = mainMenu.findItem(R.id.toggle_dom_storage);
2572         MenuItem formDataIconMenuItem = mainMenu.findItem(R.id.toggle_save_form_data);
2573
2574         // Update `privacyIcon`.
2575         if (javaScriptEnabled) {  // JavaScript is enabled.
2576             privacyIconMenuItem.setIcon(R.drawable.javascript_enabled);
2577         } else if (firstPartyCookiesEnabled) {  // JavaScript is disabled but cookies are enabled.
2578             privacyIconMenuItem.setIcon(R.drawable.warning);
2579         } else {  // All the dangerous features are disabled.
2580             privacyIconMenuItem.setIcon(R.drawable.privacy_mode);
2581         }
2582
2583         // Update `firstPartyCookiesIcon`.
2584         if (firstPartyCookiesEnabled) {  // First-party cookies are enabled.
2585             firstPartyCookiesIconMenuItem.setIcon(R.drawable.cookies_enabled);
2586         } else {  // First-party cookies are disabled.
2587             firstPartyCookiesIconMenuItem.setIcon(R.drawable.cookies_disabled);
2588         }
2589
2590         // Update `domStorageIcon`.
2591         if (javaScriptEnabled && domStorageEnabled) {  // Both JavaScript and DOM storage are enabled.
2592             domStorageIconMenuItem.setIcon(R.drawable.dom_storage_enabled);
2593         } else if (javaScriptEnabled) {  // JavaScript is enabled but DOM storage is disabled.
2594             domStorageIconMenuItem.setIcon(R.drawable.dom_storage_disabled);
2595         } else {  // JavaScript is disabled, so DOM storage is ghosted.
2596             domStorageIconMenuItem.setIcon(R.drawable.dom_storage_ghosted);
2597         }
2598
2599         // Update `formDataIcon`.
2600         if (saveFormDataEnabled) {  // Form data is enabled.
2601             formDataIconMenuItem.setIcon(R.drawable.form_data_enabled);
2602         } else {  // Form data is disabled.
2603             formDataIconMenuItem.setIcon(R.drawable.form_data_disabled);
2604         }
2605
2606         // `invalidateOptionsMenu` calls `onPrepareOptionsMenu()` and redraws the icons in the `AppBar`.  `this` references the current activity.
2607         if (runInvalidateOptionsMenu) {
2608             ActivityCompat.invalidateOptionsMenu(this);
2609         }
2610     }
2611
2612     private void highlightUrlText() {
2613         String urlString = urlTextBox.getText().toString();
2614
2615         if (urlString.startsWith("http://")) {  // Highlight connections that are not encrypted.
2616             urlTextBox.getText().setSpan(redColorSpan, 0, 7, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2617             urlTextBox.getText().setSpan(boldStyleSpan, 0, 7, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2618         } else if (urlString.startsWith("https://")) {  // Highlight connections that are encrypted.
2619             urlTextBox.getText().setSpan(initialGrayColorSpan, 0, 8, Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2620         }
2621
2622         // Get the index of the `/` immediately after the domain name.
2623         int endOfDomainName = urlString.indexOf("/", (urlString.indexOf("//") + 2));
2624
2625         // De-emphasize the text after the domain name.
2626         if (endOfDomainName > 0) {
2627             urlTextBox.getText().setSpan(finalGrayColorSpan, endOfDomainName, urlString.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
2628         }
2629     }
2630 }