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[PrivacyBrowser.git] / app / src / main / java / com / stoutner / privacybrowser / activities / DomainsActivity.java
1 /*
2  * Copyright © 2017-2019 Soren Stoutner <soren@stoutner.com>.
3  *
4  * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
5  *
6  * Privacy Browser is free software: you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation, either version 3 of the License, or
9  * (at your option) any later version.
10  *
11  * Privacy Browser is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
18  */
19
20 package com.stoutner.privacybrowser.activities;
21
22 import android.annotation.SuppressLint;
23 import android.app.Activity;
24 import android.content.Context;
25 import android.content.Intent;
26 import android.content.res.Resources;
27 import android.database.Cursor;
28 import android.net.http.SslCertificate;
29 import android.os.Bundle;
30 import android.os.Handler;
31 import android.view.Menu;
32 import android.view.MenuItem;
33 import android.view.View;
34 import android.view.ViewGroup;
35 import android.view.WindowManager;
36 import android.widget.CursorAdapter;
37 import android.widget.EditText;
38 import android.widget.ListView;
39 import android.widget.RadioButton;
40 import android.widget.Spinner;
41 import android.widget.Switch;
42 import android.widget.TextView;
43
44 import androidx.appcompat.app.ActionBar;
45 import androidx.appcompat.app.AppCompatActivity;
46 import androidx.appcompat.widget.Toolbar;  // The AndroidX toolbar must be used until the minimum API is >= 21.
47 import androidx.core.app.NavUtils;
48 import androidx.fragment.app.DialogFragment;
49 import androidx.fragment.app.FragmentManager;  // The AndroidX dialog fragment must be used or an error is produced on API <=22.
50
51 import com.google.android.material.floatingactionbutton.FloatingActionButton;
52 import com.google.android.material.snackbar.Snackbar;
53
54 import com.stoutner.privacybrowser.R;
55 import com.stoutner.privacybrowser.dialogs.AddDomainDialog;
56 import com.stoutner.privacybrowser.fragments.DomainSettingsFragment;
57 import com.stoutner.privacybrowser.fragments.DomainsListFragment;
58 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
59
60 import java.util.Objects;
61
62 public class DomainsActivity extends AppCompatActivity implements AddDomainDialog.AddDomainListener, DomainsListFragment.DismissSnackbarInterface {
63     // `twoPanedMode` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onCreate()`, `onCreateOptionsMenu()`, and `populateDomainsListView()`.
64     public static boolean twoPanedMode;
65
66     // `databaseId` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onCreateOptionsMenu()`, `saveDomainSettings()` and `populateDomainsListView()`.
67     public static int currentDomainDatabaseId;
68
69     // `deleteMenuItem` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onCreateOptionsMenu()`, `onOptionsItemSelected()`, and `onBackPressed()`.
70     public static MenuItem deleteMenuItem;
71
72     // `dismissingSnackbar` is public static so it can be accessed from `DomainsListFragment`.  It is also used in `onOptionsItemSelected()`.
73     public static boolean dismissingSnackbar;
74
75     // The SSL certificate and current IP addresses are used to update pinned settings.
76     public static SslCertificate currentSslCertificate;
77     public static String currentIpAddresses;
78
79
80     // `closeActivityAfterDismissingSnackbar` is used in `onOptionsItemSelected()`, and `onBackPressed()`.
81     private boolean closeActivityAfterDismissingSnackbar;
82
83     // The undelete snackbar is used in `onOptionsItemSelected()` and `onBackPressed()`.
84     private Snackbar undoDeleteSnackbar;
85
86     // `domainsDatabaseHelper` is used in `onCreate()`, `saveDomainSettings()`, and `onDestroy()`.
87     private static DomainsDatabaseHelper domainsDatabaseHelper;
88
89     // `domainsListView` is used in `onCreate()` and `populateDomainsList()`.
90     private ListView domainsListView;
91
92     // `addDomainFAB` is used in `onCreate()`, `onCreateOptionsMenu()`, `onOptionsItemSelected()`, and `onBackPressed()`.
93     private FloatingActionButton addDomainFAB;
94
95     // `deletedDomainPosition` is used in an inner and outer class in `onOptionsItemSelected()`.
96     private int deletedDomainPosition;
97
98     // `restartAfterRotate` is used in `onCreate()` and `onCreateOptionsMenu()`.
99     private boolean restartAfterRotate;
100
101     // `domainSettingsDisplayedBeforeRotate` is used in `onCreate()` and `onCreateOptionsMenu()`.
102     private boolean domainSettingsDisplayedBeforeRotate;
103
104     // `domainSettingsDatabaseIdBeforeRotate` is used in `onCreate()` and `onCreateOptionsMenu()`.
105     private int domainSettingsDatabaseIdBeforeRotate;
106
107     // `goDirectlyToDatabaseId` is used in `onCreate()` and `onCreateOptionsMenu()`.
108     private int goDirectlyToDatabaseId;
109
110     // `closeOnBack` is used in `onCreate()`, `onOptionsItemSelected()` and `onBackPressed()`.
111     private boolean closeOnBack;
112
113     // `coordinatorLayout` is use in `onCreate()`, `onOptionsItemSelected()`, and `onSaveInstanceState()`.
114     private View coordinatorLayout;
115
116     // `resources` is used in `onCreate()`, `onOptionsItemSelected()`, and `onSaveInstanceState()`.
117     private Resources resources;
118
119     @Override
120     protected void onCreate(Bundle savedInstanceState) {
121         // Disable screenshots if not allowed.
122         if (!MainWebViewActivity.allowScreenshots) {
123             getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
124         }
125
126         // Set the activity theme.
127         if (MainWebViewActivity.darkTheme) {
128             setTheme(R.style.PrivacyBrowserDark_SecondaryActivity);
129         } else {
130             setTheme(R.style.PrivacyBrowserLight_SecondaryActivity);
131         }
132
133         // Run the default commands.
134         super.onCreate(savedInstanceState);
135
136         // Extract the values from `savedInstanceState` if it is not `null`.
137         if (savedInstanceState != null) {
138             restartAfterRotate = true;
139             domainSettingsDisplayedBeforeRotate = savedInstanceState.getBoolean("domain_settings_displayed");
140             domainSettingsDatabaseIdBeforeRotate = savedInstanceState.getInt("domain_settings_database_id");
141         }
142
143         // Get the launching intent
144         Intent intent = getIntent();
145
146         // Extract the domain to load if there is one.  `-1` is the default value.
147         goDirectlyToDatabaseId = intent.getIntExtra("load_domain", -1);
148
149         // Get the status of close-on-back, which is true when the domains activity is called from the options menu.
150         closeOnBack = intent.getBooleanExtra("close_on_back", false);
151
152         // Set the content view.
153         setContentView(R.layout.domains_coordinatorlayout);
154
155         // Populate the class variables.
156         coordinatorLayout = findViewById(R.id.domains_coordinatorlayout);
157         resources = getResources();
158
159         // `SupportActionBar` from `android.support.v7.app.ActionBar` must be used until the minimum API is >= 21.
160         final Toolbar toolbar = findViewById(R.id.domains_toolbar);
161         setSupportActionBar(toolbar);
162
163         // Get a handle for the action bar.
164         ActionBar actionBar = getSupportActionBar();
165
166         // Remove the incorrect lint warning that the action bar might be null.
167         assert actionBar != null;
168
169         // Set the back arrow on the action bar.
170         actionBar.setDisplayHomeAsUpEnabled(true);
171
172         // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
173         domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
174
175         // Determine if we are in two pane mode.  `domain_settings_fragment_container` does not exist on devices with a width less than 900dp.
176         twoPanedMode = (findViewById(R.id.domain_settings_fragment_container) != null);
177
178         // Configure `addDomainFAB`.
179         addDomainFAB = findViewById(R.id.add_domain_fab);
180         addDomainFAB.setOnClickListener((View view) -> {
181             // Show the add domain `AlertDialog`.
182             DialogFragment addDomainDialog = new AddDomainDialog();
183             addDomainDialog.show(getSupportFragmentManager(), resources.getString(R.string.add_domain));
184         });
185     }
186
187     @Override
188     public boolean onCreateOptionsMenu(Menu menu) {
189         // Inflate the menu.
190         getMenuInflater().inflate(R.menu.domains_options_menu, menu);
191
192         // Store `deleteMenuItem` for future use.
193         deleteMenuItem = menu.findItem(R.id.delete_domain);
194
195         // Only display `deleteMenuItem` (initially) in two-paned mode.
196         deleteMenuItem.setVisible(twoPanedMode);
197
198         // Get a handle for the fragment manager.
199         FragmentManager fragmentManager = getSupportFragmentManager();
200
201         // Display the fragments.  This must be done from `onCreateOptionsMenu()` instead of `onCreate()` because `populateDomainsListView()` needs `deleteMenuItem` to be inflated.
202         if (restartAfterRotate && domainSettingsDisplayedBeforeRotate) {  // The device was rotated and domain settings were displayed previously.
203             if (twoPanedMode) {  // The device is in two-paned mode.
204                 // Reset `restartAfterRotate`.
205                 restartAfterRotate = false;
206
207                 // Display `DomainsListFragment`.
208                 DomainsListFragment domainsListFragment = new DomainsListFragment();
209                 fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
210                 fragmentManager.executePendingTransactions();
211
212                 // Populate the list of domains.  `domainSettingsDatabaseId` highlights the domain that was highlighted before the rotation.
213                 populateDomainsListView(domainSettingsDatabaseIdBeforeRotate);
214             } else {  // The device is in single-paned mode.
215                 // Reset `restartAfterRotate`.
216                 restartAfterRotate = false;
217
218                 // Store the current domain database ID.
219                 currentDomainDatabaseId = domainSettingsDatabaseIdBeforeRotate;
220
221                 // Add `currentDomainDatabaseId` to `argumentsBundle`.
222                 Bundle argumentsBundle = new Bundle();
223                 argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, currentDomainDatabaseId);
224
225                 // Add `argumentsBundle` to `domainSettingsFragment`.
226                 DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
227                 domainSettingsFragment.setArguments(argumentsBundle);
228
229                 // Show `deleteMenuItem`.
230                 deleteMenuItem.setVisible(true);
231
232                 // Hide `add_domain_fab`.
233                 addDomainFAB.hide();
234
235                 // Display `domainSettingsFragment`.
236                 fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
237             }
238         } else {  // The device was not rotated or, if it was, domain settings were not displayed previously.
239             if (goDirectlyToDatabaseId >=0) {  // Load the indicated domain settings.
240                 // Store the current domain database ID.
241                 currentDomainDatabaseId = goDirectlyToDatabaseId;
242
243                 if (twoPanedMode) {  // The device is in two-paned mode.
244                     // Display `DomainsListFragment`.
245                     DomainsListFragment domainsListFragment = new DomainsListFragment();
246                     fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
247                     fragmentManager.executePendingTransactions();
248
249                     // Populate the list of domains.  `domainSettingsDatabaseId` highlights the domain that was highlighted before the rotation.
250                     populateDomainsListView(goDirectlyToDatabaseId);
251                 } else {  // The device is in single-paned mode.
252                     // Add the domain ID to be loaded to `argumentsBundle`.
253                     Bundle argumentsBundle = new Bundle();
254                     argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, goDirectlyToDatabaseId);
255
256                     // Add `argumentsBundle` to `domainSettingsFragment`.
257                     DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
258                     domainSettingsFragment.setArguments(argumentsBundle);
259
260                     // Show `deleteMenuItem`.
261                     deleteMenuItem.setVisible(true);
262
263                     // Hide `add_domain_fab`.
264                     addDomainFAB.hide();
265
266                     // Display `domainSettingsFragment`.
267                     fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
268                 }
269             } else {  // Highlight the first domain.
270                 // Display `DomainsListFragment`.
271                 DomainsListFragment domainsListFragment = new DomainsListFragment();
272                 fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
273                 fragmentManager.executePendingTransactions();
274
275                 // Populate the list of domains.  `-1` highlights the first domain.
276                 populateDomainsListView(-1);
277             }
278         }
279
280         // Success!
281         return true;
282     }
283
284     @Override
285     public boolean onOptionsItemSelected(MenuItem menuItem) {
286         // Get the ID of the menu item that was selected.
287         int menuItemID = menuItem.getItemId();
288
289         // Get a handle for the fragment manager.
290         FragmentManager fragmentManager = getSupportFragmentManager();
291
292         switch (menuItemID) {
293             case android.R.id.home:  // The home arrow is identified as `android.R.id.home`, not just `R.id.home`.
294                 if (twoPanedMode) {  // The device is in two-paned mode.
295                     // Save the current domain settings if the domain settings fragment is displayed.
296                     if (findViewById(R.id.domain_settings_scrollview) != null) {
297                         saveDomainSettings(coordinatorLayout, resources);
298                     }
299
300                     // Dismiss the undo delete `SnackBar` if it is shown.
301                     if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
302                         // Set the close flag.
303                         closeActivityAfterDismissingSnackbar = true;
304
305                         // Dismiss the snackbar.
306                         undoDeleteSnackbar.dismiss();
307                     } else {
308                         // Go home.
309                         NavUtils.navigateUpFromSameTask(this);
310                     }
311                 } else if (closeOnBack) {  // Go directly back to the main WebView activity because the domains activity was launched from the options menu.
312                     // Save the current domain settings.
313                     saveDomainSettings(coordinatorLayout, resources);
314
315                     // Go home.
316                     NavUtils.navigateUpFromSameTask(this);
317                 } else if (findViewById(R.id.domain_settings_scrollview) != null) {  // The device is in single-paned mode and the domain settings fragment is displayed.
318                     // Save the current domain settings.
319                     saveDomainSettings(coordinatorLayout, resources);
320
321                     // Display the domains list fragment.
322                     DomainsListFragment domainsListFragment = new DomainsListFragment();
323                     fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
324                     fragmentManager.executePendingTransactions();
325
326                     // Populate the list of domains.  `-1` highlights the first domain if in two-paned mode.  It has no effect in single-paned mode.
327                     populateDomainsListView(-1);
328
329                     // Show the add domain FAB.
330                     addDomainFAB.show();
331
332                     // Hide the delete menu item.
333                     deleteMenuItem.setVisible(false);
334                 } else {  // The device is in single-paned mode and `DomainsListFragment` is displayed.
335                     // Dismiss the undo delete `SnackBar` if it is shown.
336                     if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
337                         // Set the close flag.
338                         closeActivityAfterDismissingSnackbar = true;
339
340                         // Dismiss the snackbar.
341                         undoDeleteSnackbar.dismiss();
342                     } else {
343                         // Go home.
344                         NavUtils.navigateUpFromSameTask(this);
345                     }
346                 }
347                 break;
348
349             case R.id.delete_domain:
350                 // Reset close-on-back, which otherwise can cause errors if the system attempts to save settings for a domain that no longer exists.
351                 closeOnBack = false;
352
353                 // Store a copy of `currentDomainDatabaseId` because it could change while the `Snackbar` is displayed.
354                 final int databaseIdToDelete = currentDomainDatabaseId;
355
356                 // Update the fragments and menu items.
357                 if (twoPanedMode) {  // Two-paned mode.
358                     // Store the deleted domain position, which is needed if `Undo` is selected in the `Snackbar`.
359                     deletedDomainPosition = domainsListView.getCheckedItemPosition();
360
361                     // Disable the options `MenuItems`.
362                     deleteMenuItem.setEnabled(false);
363                     deleteMenuItem.setIcon(R.drawable.delete_blue);
364
365                     // Remove the domain settings fragment.
366                     fragmentManager.beginTransaction().remove(Objects.requireNonNull(fragmentManager.findFragmentById(R.id.domain_settings_fragment_container))).commit();
367                 } else {  // Single-paned mode.
368                     // Display `DomainsListFragment`.
369                     DomainsListFragment domainsListFragment = new DomainsListFragment();
370                     fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
371                     fragmentManager.executePendingTransactions();
372
373                     // Show the add domain FAB.
374                     addDomainFAB.show();
375
376                     // Hide `deleteMenuItem`.
377                     deleteMenuItem.setVisible(false);
378                 }
379
380                 // Get a `Cursor` that does not show the domain to be deleted.
381                 Cursor domainsPendingDeleteCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomainExcept(databaseIdToDelete);
382
383                 // Setup `domainsPendingDeleteCursorAdapter` with `this` context.  `false` disables `autoRequery`.
384                 CursorAdapter domainsPendingDeleteCursorAdapter = new CursorAdapter(this, domainsPendingDeleteCursor, false) {
385                     @Override
386                     public View newView(Context context, Cursor cursor, ViewGroup parent) {
387                         // Inflate the individual item layout.  `false` does not attach it to the root.
388                         return getLayoutInflater().inflate(R.layout.domain_name_linearlayout, parent, false);
389                     }
390
391                     @Override
392                     public void bindView(View view, Context context, Cursor cursor) {
393                         // Set the domain name.
394                         String domainNameString = cursor.getString(cursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME));
395                         TextView domainNameTextView = view.findViewById(R.id.domain_name_textview);
396                         domainNameTextView.setText(domainNameString);
397                     }
398                 };
399
400                 // Update the handle for the current `domains_listview`.
401                 domainsListView = findViewById(R.id.domains_listview);
402
403                 // Update the `ListView`.
404                 domainsListView.setAdapter(domainsPendingDeleteCursorAdapter);
405
406                 // Get a handle for the activity.
407                 Activity activity = this;
408
409                 // Display a `Snackbar`.
410                 undoDeleteSnackbar = Snackbar.make(domainsListView, R.string.domain_deleted, Snackbar.LENGTH_LONG)
411                         .setAction(R.string.undo, (View v) -> {
412                             // Do nothing because everything will be handled by `onDismissed()` below.
413                         })
414                         .addCallback(new Snackbar.Callback() {
415                             @SuppressLint("SwitchIntDef")  // Ignore the lint warning about not handling the other possible events as they are covered by `default:`.
416                             @Override
417                             public void onDismissed(Snackbar snackbar, int event) {
418                                 switch (event) {
419                                     // The user pushed the `Undo` button.
420                                     case Snackbar.Callback.DISMISS_EVENT_ACTION:
421                                         // Store `databaseId` in `argumentsBundle`.
422                                         Bundle argumentsBundle = new Bundle();
423                                         argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, databaseIdToDelete);
424
425                                         // Add `argumentsBundle` to `domainSettingsFragment`.
426                                         DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
427                                         domainSettingsFragment.setArguments(argumentsBundle);
428
429                                         // Display the correct fragments.
430                                         if (twoPanedMode) {  // The device in in two-paned mode.
431                                             // Get a `Cursor` with the current contents of the domains database.
432                                             Cursor undoDeleteDomainsCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
433
434                                             // Setup `domainsCursorAdapter` with `this` context.  `false` disables `autoRequery`.
435                                             CursorAdapter undoDeleteDomainsCursorAdapter = new CursorAdapter(getApplicationContext(), undoDeleteDomainsCursor, false) {
436                                                 @Override
437                                                 public View newView(Context context, Cursor cursor, ViewGroup parent) {
438                                                     // Inflate the individual item layout.  `false` does not attach it to the root.
439                                                     return getLayoutInflater().inflate(R.layout.domain_name_linearlayout, parent, false);
440                                                 }
441
442                                                 @Override
443                                                 public void bindView(View view, Context context, Cursor cursor) {
444                                                     // Set the domain name.
445                                                     String domainNameString = cursor.getString(cursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME));
446                                                     TextView domainNameTextView = view.findViewById(R.id.domain_name_textview);
447                                                     domainNameTextView.setText(domainNameString);
448                                                 }
449                                             };
450
451                                             // Update the `ListView`.
452                                             domainsListView.setAdapter(undoDeleteDomainsCursorAdapter);
453                                             // Select the previously deleted domain in `domainsListView`.
454                                             domainsListView.setItemChecked(deletedDomainPosition, true);
455
456                                             // Display `domainSettingsFragment`.
457                                             fragmentManager.beginTransaction().replace(R.id.domain_settings_fragment_container, domainSettingsFragment).commit();
458
459                                             // Enable the options `MenuItems`.
460                                             deleteMenuItem.setEnabled(true);
461                                             deleteMenuItem.setIcon(R.drawable.delete_light);
462                                         } else {  // The device in in one-paned mode.
463                                             // Display `domainSettingsFragment`.
464                                             fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
465
466                                             // Hide the add domain FAB.
467                                             addDomainFAB.hide();
468
469                                             // Show and enable `deleteMenuItem`.
470                                             deleteMenuItem.setVisible(true);
471
472                                             // Display `domainSettingsFragment`.
473                                             fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
474                                         }
475                                         break;
476
477                                     // The `Snackbar` was dismissed without the `Undo` button being pushed.
478                                     default:
479                                         // Delete the selected domain.
480                                         domainsDatabaseHelper.deleteDomain(databaseIdToDelete);
481
482                                         // Enable the delete menu item if the system was waiting for a snackbar to be dismissed.
483                                         if (dismissingSnackbar) {
484                                             // Create a `Runnable` to enable the delete menu item.
485                                             Runnable enableDeleteMenuItemRunnable = () -> {
486                                                 // Enable `deleteMenuItem` according to the display mode.
487                                                 if (twoPanedMode) {  // Two-paned mode.
488                                                     // Enable `deleteMenuItem`.
489                                                     deleteMenuItem.setEnabled(true);
490
491                                                     // Set the delete icon according to the theme.
492                                                     if (MainWebViewActivity.darkTheme) {
493                                                         deleteMenuItem.setIcon(R.drawable.delete_dark);
494                                                     } else {
495                                                         deleteMenuItem.setIcon(R.drawable.delete_light);
496                                                     }
497                                                 } else {  // Single-paned mode.
498                                                     // Show `deleteMenuItem`.
499                                                     deleteMenuItem.setVisible(true);
500                                                 }
501
502                                                 // Reset `dismissingSnackbar`.
503                                                 dismissingSnackbar = false;
504                                             };
505
506                                             // Enable the delete menu icon after 100 milliseconds to make sure that the previous domain has been deleted from the database.
507                                             Handler handler = new Handler();
508                                             handler.postDelayed(enableDeleteMenuItemRunnable, 100);
509                                         }
510
511                                         // Close the activity if back was pressed.
512                                         if (closeActivityAfterDismissingSnackbar) {
513                                             // Go home.
514                                             NavUtils.navigateUpFromSameTask(activity);
515                                         }
516
517                                         break;
518                                 }
519                             }
520                         });
521
522                 // Show the Snackbar.
523                 undoDeleteSnackbar.show();
524                 break;
525         }
526
527         // Consume the event.
528         return true;
529     }
530
531     @Override
532     protected void onSaveInstanceState(Bundle outState) {
533         // Store the current `DomainSettingsFragment` state in `outState`.
534         if (findViewById(R.id.domain_settings_scrollview) != null) {  // `DomainSettingsFragment` is displayed.
535             // Save any changes that have been made to the domain settings.
536             saveDomainSettings(coordinatorLayout, resources);
537
538             // Store `DomainSettingsDisplayed`.
539             outState.putBoolean("domain_settings_displayed", true);
540             outState.putInt("domain_settings_database_id", DomainSettingsFragment.databaseId);
541         } else {  // `DomainSettingsFragment` is not displayed.
542             outState.putBoolean("domain_settings_displayed", false);
543             outState.putInt("domain_settings_database_id", -1);
544         }
545
546         super.onSaveInstanceState(outState);
547     }
548
549     // Control what the navigation bar back button does.
550     @Override
551     public void onBackPressed() {
552         // Get a handle for the fragment manager.
553         FragmentManager fragmentManager = getSupportFragmentManager();
554
555         if (twoPanedMode) {  // The device is in two-paned mode.
556             // Save the current domain settings if the domain settings fragment is displayed.
557             if (findViewById(R.id.domain_settings_scrollview) != null) {
558                 saveDomainSettings(coordinatorLayout, resources);
559             }
560
561             // Dismiss the undo delete SnackBar if it is shown.
562             if ((undoDeleteSnackbar != null) && undoDeleteSnackbar.isShown()) {
563                 // Set the close flag.
564                 closeActivityAfterDismissingSnackbar = true;
565
566                 // Dismiss the snackbar.
567                 undoDeleteSnackbar.dismiss();
568             } else {
569                 // Pass `onBackPressed()` to the system.
570                 super.onBackPressed();
571             }
572         } else if (closeOnBack) {  // Go directly back to the main WebView activity because the domains activity was launched from the options menu.
573             // Save the current domain settings.
574             saveDomainSettings(coordinatorLayout, resources);
575
576             // Pass `onBackPressed()` to the system.
577             super.onBackPressed();
578         } else if (findViewById(R.id.domain_settings_scrollview) != null) {  // The device is in single-paned mode and domain settings fragment is displayed.
579             // Save the current domain settings.
580             saveDomainSettings(coordinatorLayout, resources);
581
582             // Display the domains list fragment.
583             DomainsListFragment domainsListFragment = new DomainsListFragment();
584             fragmentManager.beginTransaction().replace(R.id.domains_listview_fragment_container, domainsListFragment).commit();
585             fragmentManager.executePendingTransactions();
586
587             // Populate the list of domains.  `-1` highlights the first domain if in two-paned mode.  It has no effect in single-paned mode.
588             populateDomainsListView(-1);
589
590             // Show the add domain FAB.
591             addDomainFAB.show();
592
593             // Hide the delete menu item.
594             deleteMenuItem.setVisible(false);
595         } else {  // The device is in single-paned mode and the domain list fragment is displayed.
596             // Dismiss the undo delete SnackBar if it is shown.
597             if ((undoDeleteSnackbar != null) && undoDeleteSnackbar.isShown()) {
598                 // Set the close flag.
599                 closeActivityAfterDismissingSnackbar = true;
600
601                 // Dismiss the snackbar.
602                 undoDeleteSnackbar.dismiss();
603             } else {
604                 // Pass `onBackPressed()` to the system.
605                 super.onBackPressed();
606             }
607         }
608     }
609
610     @Override
611     public void onAddDomain(DialogFragment dialogFragment) {
612         // Dismiss the undo delete snackbar if it is currently displayed.
613         if ((undoDeleteSnackbar != null) && undoDeleteSnackbar.isShown()) {
614             undoDeleteSnackbar.dismiss();
615         }
616
617         // Get the new domain name String from the dialog fragment.
618         EditText domainNameEditText = dialogFragment.getDialog().findViewById(R.id.domain_name_edittext);
619         String domainNameString = domainNameEditText.getText().toString();
620
621         // Create the domain and store the database ID in `currentDomainDatabaseId`.
622         currentDomainDatabaseId = domainsDatabaseHelper.addDomain(domainNameString);
623
624         // Display the newly created domain.
625         if (twoPanedMode) {  // The device in in two-paned mode.
626             populateDomainsListView(currentDomainDatabaseId);
627         } else {  // The device is in single-paned mode.
628             // Hide the add domain FAB.
629             addDomainFAB.hide();
630
631             // Show and enable `deleteMenuItem`.
632             DomainsActivity.deleteMenuItem.setVisible(true);
633
634             // Add the current domain database ID to the arguments bundle.
635             Bundle argumentsBundle = new Bundle();
636             argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, currentDomainDatabaseId);
637
638             // Add and arguments bundle to the domain setting fragment.
639             DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
640             domainSettingsFragment.setArguments(argumentsBundle);
641
642             // Display the domain settings fragment.
643             getSupportFragmentManager().beginTransaction().replace(R.id.domains_listview_fragment_container, domainSettingsFragment).commit();
644         }
645     }
646
647     public void saveDomainSettings(View view, Resources resources) {
648         // Get handles for the domain settings.
649         EditText domainNameEditText = view.findViewById(R.id.domain_settings_name_edittext);
650         Switch javaScriptSwitch = view.findViewById(R.id.javascript_switch);
651         Switch firstPartyCookiesSwitch = view.findViewById(R.id.first_party_cookies_switch);
652         Switch thirdPartyCookiesSwitch = view.findViewById(R.id.third_party_cookies_switch);
653         Switch domStorageSwitch = view.findViewById(R.id.dom_storage_switch);
654         Switch formDataSwitch = view.findViewById(R.id.form_data_switch);  // Form data can be removed once the minimum API >= 26.
655         Switch easyListSwitch = view.findViewById(R.id.easylist_switch);
656         Switch easyPrivacySwitch = view.findViewById(R.id.easyprivacy_switch);
657         Switch fanboysAnnoyanceSwitch = view.findViewById(R.id.fanboys_annoyance_list_switch);
658         Switch fanboysSocialBlockingSwitch = view.findViewById(R.id.fanboys_social_blocking_list_switch);
659         Switch ultraPrivacySwitch = view.findViewById(R.id.ultraprivacy_switch);
660         Switch blockAllThirdPartyRequestsSwitch = view.findViewById(R.id.block_all_third_party_requests_switch);
661         Spinner userAgentSpinner = view.findViewById(R.id.user_agent_spinner);
662         EditText customUserAgentEditText = view.findViewById(R.id.custom_user_agent_edittext);
663         Spinner fontSizeSpinner = view.findViewById(R.id.font_size_spinner);
664         Spinner swipeToRefreshSpinner = view.findViewById(R.id.swipe_to_refresh_spinner);
665         Spinner displayWebpageImagesSpinner = view.findViewById(R.id.display_webpage_images_spinner);
666         Spinner nightModeSpinner = view.findViewById(R.id.night_mode_spinner);
667         Switch pinnedSslCertificateSwitch = view.findViewById(R.id.pinned_ssl_certificate_switch);
668         RadioButton currentWebsiteCertificateRadioButton = view.findViewById(R.id.current_website_certificate_radiobutton);
669         Switch pinnedIpAddressesSwitch = view.findViewById(R.id.pinned_ip_addresses_switch);
670         RadioButton currentIpAddressesRadioButton = view.findViewById(R.id.current_ip_addresses_radiobutton);
671         TextView currentIpAddressesTextView = view.findViewById(R.id.current_ip_addresses_textview);
672
673         // Extract the data for the domain settings.
674         String domainNameString = domainNameEditText.getText().toString();
675         boolean javaScriptEnabled = javaScriptSwitch.isChecked();
676         boolean firstPartyCookiesEnabled = firstPartyCookiesSwitch.isChecked();
677         boolean thirdPartyCookiesEnabled = thirdPartyCookiesSwitch.isChecked();
678         boolean domStorageEnabled  = domStorageSwitch.isChecked();
679         boolean formDataEnabled = formDataSwitch.isChecked();  // Form data can be removed once the minimum API >= 26.
680         boolean easyListEnabled = easyListSwitch.isChecked();
681         boolean easyPrivacyEnabled = easyPrivacySwitch.isChecked();
682         boolean fanboysAnnoyanceEnabled = fanboysAnnoyanceSwitch.isChecked();
683         boolean fanboysSocialBlockingEnabled = fanboysSocialBlockingSwitch.isChecked();
684         boolean ultraPrivacyEnabled = ultraPrivacySwitch.isChecked();
685         boolean blockAllThirdPartyRequests = blockAllThirdPartyRequestsSwitch.isChecked();
686         int userAgentPosition = userAgentSpinner.getSelectedItemPosition();
687         int fontSizePosition = fontSizeSpinner.getSelectedItemPosition();
688         int swipeToRefreshInt = swipeToRefreshSpinner.getSelectedItemPosition();
689         int displayWebpageImagesInt = displayWebpageImagesSpinner.getSelectedItemPosition();
690         int nightModeInt = nightModeSpinner.getSelectedItemPosition();
691         boolean pinnedSslCertificate = pinnedSslCertificateSwitch.isChecked();
692         boolean pinnedIpAddress = pinnedIpAddressesSwitch.isChecked();
693
694         // Initialize the user agent name string.
695         String userAgentName;
696
697         // Set the user agent name.
698         switch (userAgentPosition) {
699             case MainWebViewActivity.DOMAINS_SYSTEM_DEFAULT_USER_AGENT:
700                 // Set the user agent name to be `System default user agent`.
701                 userAgentName = resources.getString(R.string.system_default_user_agent);
702                 break;
703
704             case MainWebViewActivity.DOMAINS_CUSTOM_USER_AGENT:
705                 // Set the user agent name to be the custom user agent.
706                 userAgentName = customUserAgentEditText.getText().toString();
707                 break;
708
709             default:
710                 // Get the array of user agent names.
711                 String[] userAgentNameArray = resources.getStringArray(R.array.user_agent_names);
712
713                 // Set the user agent name from the array.  The domain spinner has one more entry than the name array, so the position must be decremented.
714                 userAgentName = userAgentNameArray[userAgentPosition - 1];
715         }
716
717         // Get the font size integer.
718         int fontSizeInt = Integer.parseInt(resources.getStringArray(R.array.domain_settings_font_size_entry_values)[fontSizePosition]);
719
720         // Save the domain settings.
721         domainsDatabaseHelper.updateDomain(DomainsActivity.currentDomainDatabaseId, domainNameString, javaScriptEnabled, firstPartyCookiesEnabled, thirdPartyCookiesEnabled,
722                     domStorageEnabled, formDataEnabled, easyListEnabled, easyPrivacyEnabled, fanboysAnnoyanceEnabled, fanboysSocialBlockingEnabled, ultraPrivacyEnabled, blockAllThirdPartyRequests,
723                     userAgentName, fontSizeInt, swipeToRefreshInt, nightModeInt, displayWebpageImagesInt, pinnedSslCertificate, pinnedIpAddress);
724
725         // Update the pinned SSL certificate if a new one is checked.
726         if (currentWebsiteCertificateRadioButton.isChecked()) {
727             // Store the values from the SSL certificate.
728             String issuedToCommonName = currentSslCertificate.getIssuedTo().getCName();
729             String issuedToOrganization = currentSslCertificate.getIssuedTo().getOName();
730             String issuedToOrganizationalUnit = currentSslCertificate.getIssuedTo().getUName();
731             String issuedByCommonName = currentSslCertificate.getIssuedBy().getCName();
732             String issuedByOrganization = currentSslCertificate.getIssuedBy().getOName();
733             String issuedByOrganizationalUnit = currentSslCertificate.getIssuedBy().getUName();
734             long startDateLong = currentSslCertificate.getValidNotBeforeDate().getTime();
735             long endDateLong = currentSslCertificate.getValidNotAfterDate().getTime();
736
737             // Update the database.
738             domainsDatabaseHelper.updatePinnedSslCertificate(currentDomainDatabaseId, issuedToCommonName, issuedToOrganization, issuedToOrganizationalUnit, issuedByCommonName, issuedByOrganization,
739                     issuedByOrganizationalUnit, startDateLong, endDateLong);
740         }
741
742         // Update the pinned IP addresses if new ones are checked.
743         if (currentIpAddressesRadioButton.isChecked()) {
744             // Get the current IP addresses.
745             String currentIpAddresses = currentIpAddressesTextView.getText().toString();
746
747             // Update the database.
748             domainsDatabaseHelper.updatePinnedIpAddresses(currentDomainDatabaseId, currentIpAddresses);
749         }
750     }
751
752     private void populateDomainsListView(final int highlightedDomainDatabaseId) {
753         // get a handle for the current `domains_listview`.
754         domainsListView = findViewById(R.id.domains_listview);
755
756         // Get a `Cursor` with the current contents of the domains database.
757         Cursor domainsCursor = domainsDatabaseHelper.getDomainNameCursorOrderedByDomain();
758
759         // Setup `domainsCursorAdapter` with `this` context.  `false` disables `autoRequery`.
760         CursorAdapter domainsCursorAdapter = new CursorAdapter(getApplicationContext(), domainsCursor, false) {
761             @Override
762             public View newView(Context context, Cursor cursor, ViewGroup parent) {
763                 // Inflate the individual item layout.  `false` does not attach it to the root.
764                 return getLayoutInflater().inflate(R.layout.domain_name_linearlayout, parent, false);
765             }
766
767             @Override
768             public void bindView(View view, Context context, Cursor cursor) {
769                 // Set the domain name.
770                 String domainNameString = cursor.getString(cursor.getColumnIndex(DomainsDatabaseHelper.DOMAIN_NAME));
771                 TextView domainNameTextView = view.findViewById(R.id.domain_name_textview);
772                 domainNameTextView.setText(domainNameString);
773             }
774         };
775
776         // Update the `ListView`.
777         domainsListView.setAdapter(domainsCursorAdapter);
778
779         // Display the domain settings in the second pane if operating in two pane mode and the database contains at least one domain.
780         if (DomainsActivity.twoPanedMode && (domainsCursor.getCount() > 0)) {  // Two-paned mode is enabled and there is at least one domain.
781             // Initialize `highlightedDomainPosition`.
782             int highlightedDomainPosition = 0;
783
784             // Get the cursor position for the highlighted domain.
785             for (int i = 0; i < domainsCursor.getCount(); i++) {
786                 // Move to position `i` in the cursor.
787                 domainsCursor.moveToPosition(i);
788
789                 // Get the database ID for this position.
790                 int currentDatabaseId = domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper._ID));
791
792                 // Set `highlightedDomainPosition` if the database ID for this matches `highlightedDomainDatabaseId`.
793                 if (highlightedDomainDatabaseId == currentDatabaseId) {
794                     highlightedDomainPosition = i;
795                 }
796             }
797
798             // Select the highlighted domain.
799             domainsListView.setItemChecked(highlightedDomainPosition, true);
800
801             // Get the database ID for the highlighted domain.
802             domainsCursor.moveToPosition(highlightedDomainPosition);
803             currentDomainDatabaseId = domainsCursor.getInt(domainsCursor.getColumnIndex(DomainsDatabaseHelper._ID));
804
805             // Store the database ID in the arguments bundle.
806             Bundle argumentsBundle = new Bundle();
807             argumentsBundle.putInt(DomainSettingsFragment.DATABASE_ID, currentDomainDatabaseId);
808
809             // Add and arguments bundle to the domain settings fragment.
810             DomainSettingsFragment domainSettingsFragment = new DomainSettingsFragment();
811             domainSettingsFragment.setArguments(argumentsBundle);
812
813             // Display the domain settings fragment.
814             getSupportFragmentManager().beginTransaction().replace(R.id.domain_settings_fragment_container, domainSettingsFragment).commit();
815
816             // Enable the delete options menu items.
817             deleteMenuItem.setEnabled(true);
818
819             // Set the delete icon according to the theme.
820             if (MainWebViewActivity.darkTheme) {
821                 deleteMenuItem.setIcon(R.drawable.delete_dark);
822             } else {
823                 deleteMenuItem.setIcon(R.drawable.delete_light);
824             }
825         } else if (twoPanedMode) {  // Two-paned mode is enabled but there are no domains.
826             // Disable the options `MenuItems`.
827             deleteMenuItem.setEnabled(false);
828             deleteMenuItem.setIcon(R.drawable.delete_blue);
829         }
830     }
831
832     @Override
833     public void dismissSnackbar() {
834         // Dismiss the undo delete snackbar if it is shown.
835         if (undoDeleteSnackbar != null && undoDeleteSnackbar.isShown()) {
836             // Dismiss the snackbar.
837             undoDeleteSnackbar.dismiss();
838         }
839     }
840
841     @Override
842     public void onDestroy() {
843         // Close the domains database helper.
844         domainsDatabaseHelper.close();
845
846         // Run the default commands.
847         super.onDestroy();
848     }
849 }