Add domains `Snackbars` and ghosting of switches.
[PrivacyBrowser.git] / app / src / main / java / com / stoutner / privacybrowser / activities / BookmarksActivity.java
1 /*
2  * Copyright 2016-2017 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.app.Activity;
23 import android.content.Context;
24 import android.content.Intent;
25 import android.database.Cursor;
26 import android.graphics.Bitmap;
27 import android.graphics.BitmapFactory;
28 import android.graphics.Typeface;
29 import android.graphics.drawable.BitmapDrawable;
30 import android.graphics.drawable.Drawable;
31 import android.os.Bundle;
32 import android.support.design.widget.FloatingActionButton;
33 import android.support.design.widget.Snackbar;
34 import android.support.v4.app.NavUtils;
35 import android.support.v7.app.ActionBar;
36 import android.support.v7.app.AppCompatActivity;
37 import android.support.v7.app.AppCompatDialogFragment;
38 import android.support.v7.widget.Toolbar;
39 import android.util.SparseBooleanArray;
40 import android.view.ActionMode;
41 import android.view.Menu;
42 import android.view.MenuItem;
43 import android.view.View;
44 import android.view.ViewGroup;
45 import android.widget.AbsListView;
46 import android.widget.AdapterView;
47 import android.widget.CursorAdapter;
48 import android.widget.EditText;
49 import android.widget.ImageView;
50 import android.widget.ListView;
51 import android.widget.RadioButton;
52 import android.widget.TextView;
53
54 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
55 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
56 import com.stoutner.privacybrowser.dialogs.EditBookmarkDialog;
57 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
58 import com.stoutner.privacybrowser.dialogs.MoveToFolderDialog;
59 import com.stoutner.privacybrowser.R;
60 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
61
62 import java.io.ByteArrayOutputStream;
63
64 public class BookmarksActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener, EditBookmarkDialog.EditBookmarkListener, EditBookmarkFolderDialog.EditBookmarkFolderListener,
65         MoveToFolderDialog.MoveToFolderListener {
66
67     // `bookmarksDatabaseHelper` is public static so it can be accessed from `EditBookmarkDialog` and `MoveToFolderDialog`.  It is also used in `onCreate()`,
68     // `onCreateBookmarkCreate()`, `updateBookmarksListView()`, and `updateBookmarksListViewExcept()`.
69     public static BookmarksDatabaseHelper bookmarksDatabaseHelper;
70
71     // `currentFolder` is public static so it can be accessed from `MoveToFolderDialog`.
72     // It is used in `onCreate`, `onOptionsItemSelected()`, `onCreateBookmarkCreate`, `onCreateBookmarkFolderCreate`, and `onEditBookmarkSave`.
73     public static String currentFolder;
74
75     // `checkedItemIds` is public static so it can be accessed from `EditBookmarkDialog`, `EditBookmarkFolderDialog`, and `MoveToFolderDialog`.
76     // It is also used in `onActionItemClicked`.
77     public static long[] checkedItemIds;
78
79
80     // `bookmarksListView` is used in `onCreate()`, `updateBookmarksListView()`, and `updateBookmarksListViewExcept()`.
81     private ListView bookmarksListView;
82
83     // `contextualActionMode` is used in `onCreate()` and `onEditBookmarkSave()`.
84     private ActionMode contextualActionMode;
85
86     // `selectedBookmarkPosition` is used in `onCreate()` and `onEditBookmarkSave()`.
87     private int selectedBookmarkPosition;
88
89     // `appBar` is used in `onCreate()` and `updateBookmarksListView()`.
90     private ActionBar appBar;
91
92     // `bookmarksCursor` is used in `onCreate()`, `updateBookmarksListView()`, and `updateBookmarksListViewExcept()`.
93     private Cursor bookmarksCursor;
94
95     // `oldFolderName` is used in `onCreate()` and `onEditBookmarkFolderSave()`.
96     private String oldFolderNameString;
97
98     @Override
99     protected void onCreate(Bundle savedInstanceState) {
100         super.onCreate(savedInstanceState);
101         setContentView(R.layout.bookmarks_coordinatorlayout);
102
103         // We need to use the `SupportActionBar` from `android.support.v7.app.ActionBar` until the minimum API is >= 21.
104         final Toolbar bookmarksAppBar = (Toolbar) findViewById(R.id.bookmarks_toolbar);
105         setSupportActionBar(bookmarksAppBar);
106
107         // Display the home arrow on `SupportActionBar`.
108         appBar = getSupportActionBar();
109         assert appBar != null;// This assert removes the incorrect warning in Android Studio on the following line that `appBar` might be null.
110         appBar.setDisplayHomeAsUpEnabled(true);
111
112
113         // Initialize the database handler and the `ListView`.  `this` specifies the context.  The two `nulls` do not specify the database name or a `CursorFactory`.
114         // The `0` specifies a database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
115         bookmarksDatabaseHelper = new BookmarksDatabaseHelper(this, null, null, 0);
116         bookmarksListView = (ListView) findViewById(R.id.bookmarks_listview);
117
118         // Set currentFolder to the home folder, which is `""` in the database.
119         currentFolder = "";
120
121         // Display the bookmarks in the ListView.
122         updateBookmarksListView(currentFolder);
123
124         // Set a listener so that tapping a list item loads the URL.  We need to store the activity in a variable so that we can return to the parent activity after loading the URL.
125         final Activity bookmarksActivity = this;
126         bookmarksListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
127             @Override
128             public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
129                 // Convert the id from long to int to match the format of the bookmarks database.
130                 int databaseID = (int) id;
131
132                 // Get the bookmark `Cursor` for this ID and move it to the first row.
133                 Cursor bookmarkCursor = bookmarksDatabaseHelper.getBookmarkCursor(databaseID);
134                 bookmarkCursor.moveToFirst();
135
136                 // If the bookmark is a folder load its contents into the ListView.
137                 if (bookmarkCursor.getInt(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
138                     // Update `currentFolder`.
139                     currentFolder = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
140
141                     // Reload the ListView with `currentFolder`.
142                     updateBookmarksListView(currentFolder);
143                 } else {  // Load the URL into `mainWebView`.
144                     // Get the bookmark URL and assign it to formattedUrlString.  `mainWebView` will automatically reload when `BookmarksActivity` closes.
145                     MainWebViewActivity.formattedUrlString = bookmarkCursor.getString(bookmarkCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_URL));
146
147                     NavUtils.navigateUpFromSameTask(bookmarksActivity);
148                 }
149
150                 // Close the `Cursor`.
151                 bookmarkCursor.close();
152             }
153         });
154
155         // `MultiChoiceModeListener` handles long clicks.
156         bookmarksListView.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {
157             // `moveBookmarkUpMenuItem` is used in `onCreateActionMode()` and `onItemCheckedStateChanged`.
158             MenuItem moveBookmarkUpMenuItem;
159
160             // `moveBookmarkDownMenuItem` is used in `onCreateActionMode()` and `onItemCheckedStateChanged`.
161             MenuItem moveBookmarkDownMenuItem;
162
163             // `editBookmarkMenuItem` is used in `onCreateActionMode()` and `onItemCheckedStateChanged`.
164             MenuItem editBookmarkMenuItem;
165
166             // `selectAllBookmarks` is used in `onCreateActionMode()` and `onItemCheckedStateChanges`.
167             MenuItem selectAllBookmarksMenuItem;
168
169             @Override
170             public boolean onCreateActionMode(ActionMode mode, Menu menu) {
171                 // Inflate the menu for the contextual app bar and set the title.
172                 getMenuInflater().inflate(R.menu.bookmarks_context_menu, menu);
173
174                 // Set the title.
175                 if (currentFolder.isEmpty()) {
176                     // Use `R.string.bookmarks` if we are in the home folder.
177                     mode.setTitle(R.string.bookmarks);
178                 } else {  // Use the current folder name as the title.
179                     mode.setTitle(currentFolder);
180                 }
181
182                 // Get a handle for MenuItems we need to selectively disable.
183                 moveBookmarkUpMenuItem = menu.findItem(R.id.move_bookmark_up);
184                 moveBookmarkDownMenuItem = menu.findItem(R.id.move_bookmark_down);
185                 editBookmarkMenuItem = menu.findItem(R.id.edit_bookmark);
186                 selectAllBookmarksMenuItem = menu.findItem(R.id.context_menu_select_all_bookmarks);
187
188                 // Get a handle for `contextualActionMode` so we can close it programatically.
189                 contextualActionMode = mode;
190
191                 return true;
192             }
193
194             @Override
195             public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
196                 return false;
197             }
198
199             @Override
200             public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
201                 // Get an array of the selected bookmarks.
202                 long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
203
204                 // Calculate the number of selected bookmarks.
205                 int numberOfSelectedBookmarks = selectedBookmarksLongArray.length;
206
207                 // Adjust the `mode` and the menu for the number of selected bookmarks.
208                 if (numberOfSelectedBookmarks == 0) {
209                     mode.finish();
210                 } else if (numberOfSelectedBookmarks == 1) {
211                     // List the number of selected bookmarks in the subtitle.
212                     mode.setSubtitle(getString(R.string.one_selected));
213
214                     // Show the `Move Up`, `Move Down`, and  `Edit` options.
215                     moveBookmarkUpMenuItem.setVisible(true);
216                     moveBookmarkDownMenuItem.setVisible(true);
217                     editBookmarkMenuItem.setVisible(true);
218
219                     // Get the database IDs for the bookmarks.
220                     int selectedBookmarkDatabaseId = (int) selectedBookmarksLongArray[0];
221                     int firstBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(0);
222                     // bookmarksListView is 0 indexed.
223                     int lastBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(bookmarksListView.getCount() - 1);
224
225                     // Disable `moveBookmarkUpMenuItem` if the selected bookmark is at the top of the ListView.
226                     if (selectedBookmarkDatabaseId == firstBookmarkDatabaseId) {
227                         moveBookmarkUpMenuItem.setEnabled(false);
228                         moveBookmarkUpMenuItem.setIcon(R.drawable.move_bookmark_up_disabled);
229                     } else {  // Otherwise enable `moveBookmarkUpMenuItem`.
230                         moveBookmarkUpMenuItem.setEnabled(true);
231                         moveBookmarkUpMenuItem.setIcon(R.drawable.move_bookmark_up_enabled);
232                     }
233
234                     // Disable `moveBookmarkDownMenuItem` if the selected bookmark is at the bottom of the ListView.
235                     if (selectedBookmarkDatabaseId == lastBookmarkDatabaseId) {
236                         moveBookmarkDownMenuItem.setEnabled(false);
237                         moveBookmarkDownMenuItem.setIcon(R.drawable.move_bookmark_down_disabled);
238                     } else {  // Otherwise enable `moveBookmarkDownMenuItem`.
239                         moveBookmarkDownMenuItem.setEnabled(true);
240                         moveBookmarkDownMenuItem.setIcon(R.drawable.move_bookmark_down_enabled);
241                     }
242                 } else {  // More than one bookmark is selected.
243                     // List the number of selected bookmarks in the subtitle.
244                     mode.setSubtitle(numberOfSelectedBookmarks + " " + getString(R.string.selected));
245
246                     // Hide non-applicable `MenuItems`.
247                     moveBookmarkUpMenuItem.setVisible(false);
248                     moveBookmarkDownMenuItem.setVisible(false);
249                     editBookmarkMenuItem.setVisible(false);
250                 }
251
252                 // Do not show `Select All` if all the bookmarks are already checked.
253                 if (bookmarksListView.getCheckedItemIds().length == bookmarksListView.getCount()) {
254                     selectAllBookmarksMenuItem.setVisible(false);
255                 } else {
256                     selectAllBookmarksMenuItem.setVisible(true);
257                 }
258             }
259
260             @Override
261             public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
262                 int menuItemId = item.getItemId();
263
264                 // `numberOfBookmarks` is used in `R.id.move_bookmark_up_enabled`, `R.id.move_bookmark_down_enabled`, and `R.id.context_menu_select_all_bookmarks`.
265                 int numberOfBookmarks;
266
267                 // `selectedBookmarkLongArray` is used in `R.id.move_bookmark_up`, `R.id.move_bookmark_down`, and `R.id.edit_bookmark`.
268                 long[]selectedBookmarkLongArray;
269                 // `selectedBookmarkDatabaseId` is used in `R.id.move_bookmark_up`, `R.id.move_bookmark_down`, and `R.id.edit_bookmark`.
270                 int selectedBookmarkDatabaseId;
271                 // `selectedBookmarkNewPosition` is used in `R.id.move_bookmark_up` and `R.id.move_bookmark_down`.
272                 int selectedBookmarkNewPosition;
273                 // `bookmarkPositionSparseBooleanArray` is used in `R.id.edit_bookmark` and `R.id.delete_bookmark`.
274                 SparseBooleanArray bookmarkPositionSparseBooleanArray;
275
276                 switch (menuItemId) {
277                     case R.id.move_bookmark_up:
278                         // Get the selected bookmark database ID.
279                         selectedBookmarkLongArray = bookmarksListView.getCheckedItemIds();
280                         selectedBookmarkDatabaseId = (int) selectedBookmarkLongArray[0];
281
282                         // Initialize `selectedBookmarkNewPosition`.
283                         selectedBookmarkNewPosition = 0;
284
285                         for (int i = 0; i < bookmarksListView.getCount(); i++) {
286                             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
287                             int nextBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i + 1);
288
289                             if (databaseId == selectedBookmarkDatabaseId || nextBookmarkDatabaseId == selectedBookmarkDatabaseId) {
290                                 if (databaseId == selectedBookmarkDatabaseId) {
291                                     // Move the selected bookmark up one and store the new bookmark position.
292                                     bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i - 1);
293                                     selectedBookmarkNewPosition = i - 1;
294                                 } else {  // Move the bookmark above the selected bookmark down one.
295                                     bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i + 1);
296                                 }
297                             } else {
298                                 // Reset the rest of the bookmarks' DISPLAY_ORDER to match the position in the ListView.
299                                 // This isn't necessary, but it clears out any stray values that might have crept into the database.
300                                 bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i);
301                             }
302                         }
303
304                         // Refresh the ListView.
305                         updateBookmarksListView(currentFolder);
306
307                         // Select the previously selected bookmark in the new location.
308                         bookmarksListView.setItemChecked(selectedBookmarkNewPosition, true);
309
310                         // Scroll `bookmarksListView` to five items above `selectedBookmarkNewPosition`.
311                         bookmarksListView.setSelection(selectedBookmarkNewPosition - 5);
312
313                         break;
314
315                     case R.id.move_bookmark_down:
316                         // Get the selected bookmark database ID.
317                         selectedBookmarkLongArray = bookmarksListView.getCheckedItemIds();
318                         selectedBookmarkDatabaseId = (int) selectedBookmarkLongArray[0];
319
320                         // Initialize `selectedBookmarkNewPosition`.
321                         selectedBookmarkNewPosition = 0;
322
323                         for (int i = 0; i <bookmarksListView.getCount(); i++) {
324                             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
325                             int previousBookmarkDatabaseId = (int) bookmarksListView.getItemIdAtPosition(i - 1);
326
327                             if (databaseId == selectedBookmarkDatabaseId || previousBookmarkDatabaseId == selectedBookmarkDatabaseId) {
328                                 if (databaseId == selectedBookmarkDatabaseId) {
329                                     // Move the selected bookmark down one and store the new bookmark position.
330                                     bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i + 1);
331                                     selectedBookmarkNewPosition = i + 1;
332                                 } else {  // Move the bookmark below the selected bookmark up one.
333                                     bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i - 1);
334                                 }
335                             } else {
336                                 // Reset the rest of the bookmark' DISPLAY_ORDER to match the position in the ListView.
337                                 // This isn't necessary, but it clears out any stray values that might have crept into the database.
338                                 bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i);
339                             }
340                         }
341
342                         // Refresh the ListView.
343                         updateBookmarksListView(currentFolder);
344
345                         // Select the previously selected bookmark in the new location.
346                         bookmarksListView.setItemChecked(selectedBookmarkNewPosition, true);
347
348                         // Scroll `bookmarksListView` to five items above `selectedBookmarkNewPosition`.
349                         bookmarksListView.setSelection(selectedBookmarkNewPosition - 5);
350                         break;
351
352                     case R.id.move_to_folder:
353                         // Store `checkedItemIds` for use by the `AlertDialog`.
354                         checkedItemIds = bookmarksListView.getCheckedItemIds();
355
356                         // Show the `MoveToFolderDialog` `AlertDialog` and name the instance `@string/move_to_folder
357                         AppCompatDialogFragment moveToFolderDialog = new MoveToFolderDialog();
358                         moveToFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.move_to_folder));
359                         break;
360
361                     case R.id.edit_bookmark:
362                         // Get a handle for `selectedBookmarkPosition` so we can scroll to it after refreshing the ListView.
363                         bookmarkPositionSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
364                         for (int i = 0; i < bookmarkPositionSparseBooleanArray.size(); i++) {
365                             // Find the bookmark that is selected and save the position to `selectedBookmarkPosition`.
366                             if (bookmarkPositionSparseBooleanArray.valueAt(i))
367                                 selectedBookmarkPosition = bookmarkPositionSparseBooleanArray.keyAt(i);
368                         }
369
370                         // Move to the selected database ID and find out if it is a folder.
371                         bookmarksCursor.moveToPosition(selectedBookmarkPosition);
372                         boolean isFolder = (bookmarksCursor.getInt(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1);
373
374                         // Store `checkedItemIds` for use by the `AlertDialog`.
375                         checkedItemIds = bookmarksListView.getCheckedItemIds();
376
377                         if (isFolder) {
378                             // Save the current folder name.
379                             oldFolderNameString = bookmarksCursor.getString(bookmarksCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
380
381                             // Show the `EditBookmarkFolderDialog` `AlertDialog` and name the instance `@string/edit_folder`.
382                             AppCompatDialogFragment editFolderDialog = new EditBookmarkFolderDialog();
383                             editFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_folder));
384                         } else {
385                             // Show the `EditBookmarkDialog` `AlertDialog` and name the instance `@string/edit_bookmark`.
386                             AppCompatDialogFragment editBookmarkDialog = new EditBookmarkDialog();
387                             editBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.edit_bookmark));
388                         }
389                         break;
390
391                     case R.id.delete_bookmark:
392                         // Get an array of the selected rows.
393                         final long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
394
395                         // Get a handle for `selectedBookmarkPosition` so we can scroll to it after refreshing the ListView.
396                         bookmarkPositionSparseBooleanArray = bookmarksListView.getCheckedItemPositions();
397                         for (int i = 0; i < bookmarkPositionSparseBooleanArray.size(); i++) {
398                             // Find the bookmark that is selected and save the position to `selectedBookmarkPosition`.
399                             if (bookmarkPositionSparseBooleanArray.valueAt(i))
400                                 selectedBookmarkPosition = bookmarkPositionSparseBooleanArray.keyAt(i);
401                         }
402
403                         updateBookmarksListViewExcept(selectedBookmarksLongArray, currentFolder);
404
405                         // Scroll to where the deleted bookmark was located.
406                         bookmarksListView.setSelection(selectedBookmarkPosition - 5);
407
408                         // Initialize `snackbarMessage`.
409                         String snackbarMessage;
410
411                         // Determine how many items are in the array and prepare an appropriate Snackbar message.
412                         if (selectedBookmarksLongArray.length == 1) {
413                             snackbarMessage = getString(R.string.one_bookmark_deleted);
414                         } else {
415                             snackbarMessage = selectedBookmarksLongArray.length + " " + getString(R.string.bookmarks_deleted);
416                         }
417
418                         // Show a SnackBar.
419                         Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), snackbarMessage, Snackbar.LENGTH_LONG)
420                                 .setAction(R.string.undo, new View.OnClickListener() {
421                                     @Override
422                                     public void onClick(View view) {
423                                         // Do nothing because everything will be handled by `onDismissed()` below.
424                                     }
425                                 })
426                                 .addCallback(new Snackbar.Callback() {
427                                     @Override
428                                     public void onDismissed(Snackbar snackbar, int event) {
429                                         switch (event) {
430                                             // The user pushed the `Undo` button.
431                                             case Snackbar.Callback.DISMISS_EVENT_ACTION:
432                                                 // Refresh the ListView to show the rows again.
433                                                 updateBookmarksListView(currentFolder);
434
435                                                 // Scroll to where the deleted bookmark was located.
436                                                 bookmarksListView.setSelection(selectedBookmarkPosition - 5);
437                                                 break;
438
439                                             // The `Snackbar` was dismissed without the `Undo` button being pushed.
440                                             default:
441                                                 // Delete each selected row.
442                                                 for (long databaseIdLong : selectedBookmarksLongArray) {
443                                                     // Convert `databaseIdLong` to an int.
444                                                     int databaseIdInt = (int) databaseIdLong;
445
446                                                     if (bookmarksDatabaseHelper.isFolder(databaseIdInt)) {
447                                                         deleteBookmarkFolderContents(databaseIdInt);
448                                                     }
449
450                                                     // Delete `databaseIdInt`.
451                                                     bookmarksDatabaseHelper.deleteBookmark(databaseIdInt);
452                                                 }
453                                                 break;
454                                         }
455                                     }
456                                 })
457                                 .show();
458
459                         // Close the contextual app bar.
460                         mode.finish();
461                         break;
462
463                     case R.id.context_menu_select_all_bookmarks:
464                         numberOfBookmarks = bookmarksListView.getCount();
465
466                         for (int i = 0; i < numberOfBookmarks; i++) {
467                             bookmarksListView.setItemChecked(i, true);
468                         }
469                         break;
470                 }
471                 // Consume the click.
472                 return true;
473             }
474
475             @Override
476             public void onDestroyActionMode(ActionMode mode) {
477
478             }
479         });
480
481         // Set a FloatingActionButton for creating new bookmarks.
482         FloatingActionButton createBookmarkFAB = (FloatingActionButton) findViewById(R.id.create_bookmark_fab);
483         createBookmarkFAB.setOnClickListener(new View.OnClickListener() {
484             @Override
485             public void onClick(View view) {
486                 // Show the `CreateBookmarkDialog` `AlertDialog` and name the instance `@string/create_bookmark`.
487                 AppCompatDialogFragment createBookmarkDialog = new CreateBookmarkDialog();
488                 createBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_bookmark));
489             }
490         });
491     }
492
493     @Override
494     public boolean onCreateOptionsMenu(Menu menu) {
495         // Inflate the menu.
496         getMenuInflater().inflate(R.menu.bookmarks_options_menu, menu);
497
498         // Success.
499         return true;
500     }
501
502     @Override
503     public boolean onOptionsItemSelected(MenuItem menuItem) {
504         // Get the ID of the `MenuItem` that was selected.
505         int menuItemId = menuItem.getItemId();
506
507         switch (menuItemId) {
508             case android.R.id.home:  // The home arrow is identified as `android.R.id.home`, not just `R.id.home`.
509                 if (currentFolder.isEmpty()) {  // Exit BookmarksActivity if currently in the home folder.
510                     NavUtils.navigateUpFromSameTask(this);
511                 } else {  // Navigate up one folder.
512                     // Place the former parent folder in `currentFolder`.
513                     currentFolder = bookmarksDatabaseHelper.getParentFolder(currentFolder);
514
515                     // Update `bookmarksListView`.
516                     updateBookmarksListView(currentFolder);
517                 }
518                 break;
519
520             case R.id.create_folder:
521                 // Show the `CreateBookmarkFolderDialog` `AlertDialog` and name the instance `@string/create_folder`.
522                 AppCompatDialogFragment createBookmarkFolderDialog = new CreateBookmarkFolderDialog();
523                 createBookmarkFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_folder));
524                 break;
525
526             case R.id.options_menu_select_all_bookmarks:
527                 int numberOfBookmarks = bookmarksListView.getCount();
528
529                 for (int i = 0; i < numberOfBookmarks; i++) {
530                     bookmarksListView.setItemChecked(i, true);
531                 }
532                 break;
533
534             case R.id.bookmarks_database_view:
535                 // Launch `BookmarksDatabaseViewActivity`.
536                 Intent bookmarksDatabaseViewIntent = new Intent(this, BookmarksDatabaseViewActivity.class);
537                 startActivity(bookmarksDatabaseViewIntent);
538                 break;
539         }
540         return true;
541     }
542
543     @Override
544     public void onBackPressed() {
545         if (currentFolder.isEmpty()) {  // Exit BookmarksActivity if currently in the home folder.
546             super.onBackPressed();
547         } else {  // Navigate up one folder.
548             // Place the former parent folder in `currentFolder`.
549             currentFolder = bookmarksDatabaseHelper.getParentFolder(currentFolder);
550
551             // Reload the `ListView`.
552             updateBookmarksListView(currentFolder);
553         }
554     }
555
556     @Override
557     public void onCreateBookmark(AppCompatDialogFragment dialogFragment) {
558         // Get the `EditTexts` from the `dialogFragment`.
559         EditText createBookmarkNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
560         EditText createBookmarkUrlEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
561
562         // Extract the strings from the `EditTexts`.
563         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
564         String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
565
566         // Convert the favoriteIcon Bitmap to a byte array.
567         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
568         // `0` is for lossless compression (the only option for a PNG).
569         MainWebViewActivity.favoriteIcon.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
570         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
571
572         // Display the new bookmark below the current items in the (0 indexed) list.
573         int newBookmarkDisplayOrder = bookmarksListView.getCount();
574
575         // Create the bookmark.
576         bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, newBookmarkDisplayOrder, currentFolder, favoriteIconByteArray);
577
578         // Refresh the `ListView`.  `setSelection` scrolls to the bottom of the list.
579         updateBookmarksListView(currentFolder);
580         bookmarksListView.setSelection(newBookmarkDisplayOrder);
581     }
582
583     @Override
584     public void onCreateBookmarkFolder(AppCompatDialogFragment dialogFragment) {
585         // Get `create_folder_name_edit_text` and extract the string.
586         EditText createFolderNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_folder_name_edittext);
587         String folderNameString = createFolderNameEditText.getText().toString();
588
589         // Check to see if the folder already exists.
590         Cursor bookmarkFolderCursor = bookmarksDatabaseHelper.getFolderCursor(folderNameString);
591         int existingFoldersWithNewName = bookmarkFolderCursor.getCount();
592         bookmarkFolderCursor.close();
593         if (folderNameString.isEmpty() || (existingFoldersWithNewName > 0)) {
594             String cannotCreateFolder = getResources().getString(R.string.cannot_create_folder) + " \"" + folderNameString + "\"";
595             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), cannotCreateFolder, Snackbar.LENGTH_INDEFINITE).show();
596         } else {  // Create the folder.
597             // Get the new folder icon `Bitmap`.
598             RadioButton defaultFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon_radiobutton);
599             Bitmap folderIconBitmap;
600             if (defaultFolderIconRadioButton.isChecked()) {
601                 // Get the default folder icon `ImageView` from the `Dialog` and convert it to a `Bitmap`.
602                 ImageView folderIconImageView = (ImageView) dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon);
603                 Drawable folderIconDrawable = folderIconImageView.getDrawable();
604                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
605                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
606             } else {  // Assign `favoriteIcon` from the `WebView`.
607                 folderIconBitmap = MainWebViewActivity.favoriteIcon;
608             }
609
610             // Convert `folderIconBitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
611             ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
612             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
613             byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
614
615             // Move all the bookmarks down one in the display order.
616             for (int i = 0; i < bookmarksListView.getCount(); i++) {
617                 int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
618                 bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i + 1);
619             }
620
621             // Create the folder, placing it at the top of the ListView
622             bookmarksDatabaseHelper.createFolder(folderNameString, 0, currentFolder, folderIconByteArray);
623
624             // Refresh the ListView.
625             updateBookmarksListView(currentFolder);
626         }
627     }
628
629     @Override
630     public void onSaveEditBookmark(AppCompatDialogFragment dialogFragment) {
631         // Get a long array with the the databaseId of the selected bookmark and convert it to an `int`.
632         long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
633         int selectedBookmarkDatabaseId = (int) selectedBookmarksLongArray[0];
634
635         // Get the `EditText`s from the `editBookmarkDialogFragment` and extract the strings.
636         EditText editBookmarkNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
637         String bookmarkNameString = editBookmarkNameEditText.getText().toString();
638         EditText editBookmarkUrlEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
639         String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
640
641         // Get `edit_bookmark_current_icon_radiobutton`.
642         RadioButton currentBookmarkIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
643
644         if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
645             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
646         } else {  // Update the bookmark using the `WebView` favorite icon.
647             ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
648             MainWebViewActivity.favoriteIcon.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
649             byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
650
651             //  Update the bookmark and the favorite icon.
652             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
653         }
654
655         // Close the contextual action mode.
656         contextualActionMode.finish();
657
658         // Refresh the `ListView`.  `setSelection` scrolls to the position of the bookmark that was edited.
659         updateBookmarksListView(currentFolder);
660         bookmarksListView.setSelection(selectedBookmarkPosition);
661     }
662
663     @Override
664     public void onSaveEditBookmarkFolder(AppCompatDialogFragment dialogFragment) {
665         // Get the new folder name.
666         EditText editFolderNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
667         String newFolderNameString = editFolderNameEditText.getText().toString();
668
669         // Check to see if the new folder name is unique.
670         Cursor bookmarkFolderCursor = bookmarksDatabaseHelper.getFolderCursor(newFolderNameString);
671         int existingFoldersWithNewName = bookmarkFolderCursor.getCount();
672         bookmarkFolderCursor.close();
673         if ( ((existingFoldersWithNewName == 0) || newFolderNameString.equals(oldFolderNameString)) && !newFolderNameString.isEmpty()) {
674             // Get a long array with the the database ID of the selected folder and convert it to an `int`.
675             long[] selectedFolderLongArray = bookmarksListView.getCheckedItemIds();
676             int selectedFolderDatabaseId = (int) selectedFolderLongArray[0];
677
678             // Get the `RadioButtons` from the `Dialog`.
679             RadioButton currentFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
680             RadioButton defaultFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
681
682             // Check if the favorite icon has changed.
683             if (currentFolderIconRadioButton.isChecked()) {
684                 // Update the folder name if it has changed without modifying the favorite icon.
685                 if (!newFolderNameString.equals(oldFolderNameString)) {
686                     bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
687
688                     // Refresh the `ListView`.  `setSelection` scrolls to the position of the folder that was edited.
689                     updateBookmarksListView(currentFolder);
690                     bookmarksListView.setSelection(selectedBookmarkPosition);
691                 }
692             } else {  // Update the folder icon.
693                 // Get the new folder icon `Bitmap`.
694                 Bitmap folderIconBitmap;
695                 if (defaultFolderIconRadioButton.isChecked()) {
696                     // Get the default folder icon `ImageView` from the `Drawable` and convert it to a `Bitmap`.
697                     ImageView folderIconImageView = (ImageView) dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon);
698                     Drawable folderIconDrawable = folderIconImageView.getDrawable();
699                     BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
700                     folderIconBitmap = folderIconBitmapDrawable.getBitmap();
701                 } else {  // Get the web page icon `ImageView` from the `Dialog`.
702                     folderIconBitmap = MainWebViewActivity.favoriteIcon;
703                 }
704
705                 // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
706                 ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
707                 folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
708                 byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
709
710                 bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, folderIconByteArray);
711
712                 // Refresh the `ListView`.  `setSelection` scrolls to the position of the folder that was edited.
713                 updateBookmarksListView(currentFolder);
714                 bookmarksListView.setSelection(selectedBookmarkPosition);
715             }
716         } else {  // Don't edit the folder because the new name is not unique.
717             String cannot_rename_folder = getResources().getString(R.string.cannot_save_folder) + " \"" + newFolderNameString + "\"";
718             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), cannot_rename_folder, Snackbar.LENGTH_INDEFINITE).show();
719         }
720
721         // Close the contextual action mode.
722         contextualActionMode.finish();
723     }
724
725     @Override
726     public void onMoveToFolder(AppCompatDialogFragment dialogFragment) {
727         // Get the new folder database id.
728         ListView folderListView = (ListView) dialogFragment.getDialog().findViewById(R.id.move_to_folder_listview);
729         long[] newFolderLongArray = folderListView.getCheckedItemIds();
730
731         if (newFolderLongArray.length == 0) {  // No new folder was selected.
732             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), getString(R.string.cannot_move_bookmarks), Snackbar.LENGTH_INDEFINITE).show();
733         } else {  // Move the selected bookmarks.
734             // Get the new folder database ID.
735             int newFolderDatabaseId = (int) newFolderLongArray[0];
736
737             // Instantiate `newFolderName`.
738             String newFolderName;
739
740             if (newFolderDatabaseId == 0) {
741                 // The new folder is the home folder, represented as `""` in the database.
742                 newFolderName = "";
743             } else {
744                 // Get the new folder name from the database.
745                 newFolderName = bookmarksDatabaseHelper.getFolderName(newFolderDatabaseId);
746             }
747
748             // Get a long array with the the database ID of the selected bookmarks.
749             long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
750             for (long databaseIdLong : selectedBookmarksLongArray) {
751                 // Get `databaseIdInt` for each selected bookmark.
752                 int databaseIdInt = (int) databaseIdLong;
753
754                 // Move the selected bookmark to the new folder.
755                 bookmarksDatabaseHelper.moveToFolder(databaseIdInt, newFolderName);
756             }
757
758             // Refresh the `ListView`.
759             updateBookmarksListView(currentFolder);
760
761             // Close the contextual app bar.
762             contextualActionMode.finish();
763         }
764     }
765
766     private void updateBookmarksListView(String folderName) {
767         // Get a `Cursor` with the current contents of the bookmarks database.
768         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(folderName);
769
770         // Setup `bookmarksCursorAdapter` with `this` context.  `false` disables `autoRequery`.
771         CursorAdapter bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
772             @Override
773             public View newView(Context context, Cursor cursor, ViewGroup parent) {
774                 // Inflate the individual item layout.  `false` does not attach it to the root.
775                 return getLayoutInflater().inflate(R.layout.bookmarks_item_linearlayout, parent, false);
776             }
777
778             @Override
779             public void bindView(View view, Context context, Cursor cursor) {
780                 // Get the favorite icon byte array from the `Cursor`.
781                 byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
782
783                 // Convert the byte array to a `Bitmap` beginning at the first byte and ending at the last.
784                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
785
786                 // Display the bitmap in `bookmarkFavoriteIcon`.
787                 ImageView bookmarkFavoriteIcon = (ImageView) view.findViewById(R.id.bookmark_favorite_icon);
788                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
789
790
791                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
792                 String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
793                 TextView bookmarkNameTextView = (TextView) view.findViewById(R.id.bookmark_name);
794                 bookmarkNameTextView.setText(bookmarkNameString);
795
796                 // Make the font bold for folders.
797                 if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
798                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT_BOLD);
799                 } else {  // Reset the font to default for normal bookmarks.
800                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
801                 }
802             }
803         };
804
805         // Update the ListView.
806         bookmarksListView.setAdapter(bookmarksCursorAdapter);
807
808         // Set the AppBar title.
809         if (currentFolder.isEmpty()) {
810             appBar.setTitle(R.string.bookmarks);
811         } else {
812             appBar.setTitle(currentFolder);
813         }
814     }
815
816     private void updateBookmarksListViewExcept(long[] exceptIdLongArray, String folderName) {
817         // Get a `Cursor` with the current contents of the bookmarks database except for the specified database IDs.
818         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksCursorExcept(exceptIdLongArray, folderName);
819
820         // Setup `bookmarksCursorAdapter` with `this` context.  `false` disables autoRequery.
821         CursorAdapter bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
822             @Override
823             public View newView(Context context, Cursor cursor, ViewGroup parent) {
824                 // Inflate the individual item layout.  `false` does not attach it to the root.
825                 return getLayoutInflater().inflate(R.layout.bookmarks_item_linearlayout, parent, false);
826             }
827
828             @Override
829             public void bindView(View view, Context context, Cursor cursor) {
830                 // Get the favorite icon byte array from the cursor.
831                 byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
832
833                 // Convert the byte array to a Bitmap beginning at the first byte and ending at the last.
834                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
835
836                 // Display the bitmap in `bookmarkFavoriteIcon`.
837                 ImageView bookmarkFavoriteIcon = (ImageView) view.findViewById(R.id.bookmark_favorite_icon);
838                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
839
840
841                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
842                 String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
843                 TextView bookmarkNameTextView = (TextView) view.findViewById(R.id.bookmark_name);
844                 bookmarkNameTextView.setText(bookmarkNameString);
845
846                 // Make the font bold for folders.
847                 if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
848                     // The first argument is `null` because we don't want to change the font.
849                     bookmarkNameTextView.setTypeface(null, Typeface.BOLD);
850                 } else {  // Reset the font to default.
851                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
852                 }
853             }
854         };
855
856         // Update the `ListView`.
857         bookmarksListView.setAdapter(bookmarksCursorAdapter);
858     }
859
860     private void deleteBookmarkFolderContents(int databaseId) {
861         // Get the name of the folder.
862         String folderName = bookmarksDatabaseHelper.getFolderName(databaseId);
863
864         // Get the contents of the folder.
865         Cursor folderCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(folderName);
866
867         for (int i = 0; i < folderCursor.getCount(); i++) {
868             // Move `folderCursor` to the current row.
869             folderCursor.moveToPosition(i);
870
871             // Get the database ID of the item.
872             int itemDatabaseId = folderCursor.getInt(folderCursor.getColumnIndex(BookmarksDatabaseHelper._ID));
873
874             // If this is a folder, delete the contents first.
875             if (bookmarksDatabaseHelper.isFolder(itemDatabaseId)) {
876                 deleteBookmarkFolderContents(itemDatabaseId);
877             }
878
879             bookmarksDatabaseHelper.deleteBookmark(itemDatabaseId);
880         }
881     }
882 }