Implement a working two-paned mode for `DomainsActivity`.
[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                         String snackbarMessage;
409
410                         // Determine how many items are in the array and prepare an appropriate Snackbar message.
411                         if (selectedBookmarksLongArray.length == 1) {
412                             snackbarMessage = getString(R.string.one_bookmark_deleted);
413                         } else {
414                             snackbarMessage = selectedBookmarksLongArray.length + " " + getString(R.string.bookmarks_deleted);
415                         }
416
417                         // Show a SnackBar.
418                         Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), snackbarMessage, Snackbar.LENGTH_LONG)
419                                 .setAction(R.string.undo, new View.OnClickListener() {
420                                     @Override
421                                     public void onClick(View view) {
422                                         // Do nothing because everything will be handled by `onDismissed()` below.
423                                     }
424                                 })
425                                 .addCallback(new Snackbar.Callback() {
426                                     @Override
427                                     public void onDismissed(Snackbar snackbar, int event) {
428                                         // Android Studio wants to see entries for every possible `Snackbar.Callback` even if they aren't used.
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
438                                                 break;
439
440                                             case Snackbar.Callback.DISMISS_EVENT_CONSECUTIVE:
441                                                 // Do nothing and let the default behavior run.
442
443                                             case Snackbar.Callback.DISMISS_EVENT_MANUAL:
444                                                 // Do nothing and let the default behavior run.
445
446                                             case Snackbar.Callback.DISMISS_EVENT_SWIPE:
447                                                 // Do nothing and let the default behavior run.
448
449                                             case Snackbar.Callback.DISMISS_EVENT_TIMEOUT:
450                                                 // Do nothing and let the default behavior run.
451
452                                             // The Snackbar was dismissed without the "Undo" button being pushed.
453                                             default:
454                                                 // Delete each selected row.
455                                                 for (long databaseIdLong : selectedBookmarksLongArray) {
456                                                     // Convert `databaseIdLong` to an int.
457                                                     int databaseIdInt = (int) databaseIdLong;
458
459                                                     if (bookmarksDatabaseHelper.isFolder(databaseIdInt)) {
460                                                         deleteBookmarkFolderContents(databaseIdInt);
461                                                     }
462
463                                                     // Delete `databaseIdInt`.
464                                                     bookmarksDatabaseHelper.deleteBookmark(databaseIdInt);
465                                                 }
466                                                 break;
467                                         }
468                                     }
469                                 })
470                                 .show();
471
472                         // Close the contextual app bar.
473                         mode.finish();
474                         break;
475
476                     case R.id.context_menu_select_all_bookmarks:
477                         numberOfBookmarks = bookmarksListView.getCount();
478
479                         for (int i = 0; i < numberOfBookmarks; i++) {
480                             bookmarksListView.setItemChecked(i, true);
481                         }
482                         break;
483                 }
484                 // Consume the click.
485                 return true;
486             }
487
488             @Override
489             public void onDestroyActionMode(ActionMode mode) {
490
491             }
492         });
493
494         // Set a FloatingActionButton for creating new bookmarks.
495         FloatingActionButton createBookmarkFAB = (FloatingActionButton) findViewById(R.id.create_bookmark_fab);
496         createBookmarkFAB.setOnClickListener(new View.OnClickListener() {
497             @Override
498             public void onClick(View view) {
499                 // Show the `CreateBookmarkDialog` `AlertDialog` and name the instance `@string/create_bookmark`.
500                 AppCompatDialogFragment createBookmarkDialog = new CreateBookmarkDialog();
501                 createBookmarkDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_bookmark));
502             }
503         });
504     }
505
506     @Override
507     public boolean onCreateOptionsMenu(Menu menu) {
508         //Inflate the menu.
509         getMenuInflater().inflate(R.menu.bookmarks_options_menu, menu);
510
511         return true;
512     }
513
514     @Override
515     public boolean onPrepareOptionsMenu(Menu menu) {
516         super.onPrepareOptionsMenu(menu);
517
518         return true;
519     }
520
521     @Override
522     public boolean onOptionsItemSelected(MenuItem menuItem) {
523         int menuItemId = menuItem.getItemId();
524
525         switch (menuItemId) {
526             case android.R.id.home:
527                 if (currentFolder.isEmpty()) {  // Exit BookmarksActivity if currently in the home folder.
528                     NavUtils.navigateUpFromSameTask(this);
529                 } else {  // Navigate up one folder.
530                     // Place the former parent folder in `currentFolder`.
531                     currentFolder = bookmarksDatabaseHelper.getParentFolder(currentFolder);
532
533                     // Exit BookmarksActivity if currently in the home folder.
534                     updateBookmarksListView(currentFolder);
535                 }
536                 break;
537
538             case R.id.create_folder:
539                 // Show the `CreateBookmarkFolderDialog` `AlertDialog` and name the instance `@string/create_folder`.
540                 AppCompatDialogFragment createBookmarkFolderDialog = new CreateBookmarkFolderDialog();
541                 createBookmarkFolderDialog.show(getSupportFragmentManager(), getResources().getString(R.string.create_folder));
542                 break;
543
544             case R.id.options_menu_select_all_bookmarks:
545                 int numberOfBookmarks = bookmarksListView.getCount();
546
547                 for (int i = 0; i < numberOfBookmarks; i++) {
548                     bookmarksListView.setItemChecked(i, true);
549                 }
550                 break;
551
552             case R.id.bookmarks_database_view:
553                 // Launch `BookmarksDatabaseViewActivity`.
554                 Intent bookmarksDatabaseViewIntent = new Intent(this, BookmarksDatabaseViewActivity.class);
555                 startActivity(bookmarksDatabaseViewIntent);
556                 break;
557         }
558         return true;
559     }
560
561     @Override
562     public void onBackPressed() {
563         if (currentFolder.isEmpty()) {  // Exit BookmarksActivity if currently in the home folder.
564             super.onBackPressed();
565         } else {  // Navigate up one folder.
566             // Place the former parent folder in `currentFolder`.
567             currentFolder = bookmarksDatabaseHelper.getParentFolder(currentFolder);
568
569             // Reload the `ListView`.
570             updateBookmarksListView(currentFolder);
571         }
572     }
573
574     @Override
575     public void onCreateBookmark(AppCompatDialogFragment dialogFragment) {
576         // Get the `EditTexts` from the `dialogFragment`.
577         EditText createBookmarkNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_bookmark_name_edittext);
578         EditText createBookmarkUrlEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_bookmark_url_edittext);
579
580         // Extract the strings from the `EditTexts`.
581         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
582         String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
583
584         // Convert the favoriteIcon Bitmap to a byte array.
585         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
586         // `0` is for lossless compression (the only option for a PNG).
587         MainWebViewActivity.favoriteIcon.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
588         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
589
590         // Display the new bookmark below the current items in the (0 indexed) list.
591         int newBookmarkDisplayOrder = bookmarksListView.getCount();
592
593         // Create the bookmark.
594         bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, newBookmarkDisplayOrder, currentFolder, favoriteIconByteArray);
595
596         // Refresh the `ListView`.  `setSelection` scrolls to the bottom of the list.
597         updateBookmarksListView(currentFolder);
598         bookmarksListView.setSelection(newBookmarkDisplayOrder);
599     }
600
601     @Override
602     public void onCreateBookmarkFolder(AppCompatDialogFragment dialogFragment) {
603         // Get `create_folder_name_edit_text` and extract the string.
604         EditText createFolderNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.create_folder_name_edittext);
605         String folderNameString = createFolderNameEditText.getText().toString();
606
607         // Check to see if the folder already exists.
608         Cursor bookmarkFolderCursor = bookmarksDatabaseHelper.getFolderCursor(folderNameString);
609         int existingFoldersWithNewName = bookmarkFolderCursor.getCount();
610         bookmarkFolderCursor.close();
611         if (folderNameString.isEmpty() || (existingFoldersWithNewName > 0)) {
612             String cannotCreateFolder = getResources().getString(R.string.cannot_create_folder) + " \"" + folderNameString + "\"";
613             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), cannotCreateFolder, Snackbar.LENGTH_INDEFINITE).show();
614         } else {  // Create the folder.
615             // Get the new folder icon `Bitmap`.
616             RadioButton defaultFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon_radiobutton);
617             Bitmap folderIconBitmap;
618             if (defaultFolderIconRadioButton.isChecked()) {
619                 // Get the default folder icon `ImageView` from the `Dialog` and convert it to a `Bitmap`.
620                 ImageView folderIconImageView = (ImageView) dialogFragment.getDialog().findViewById(R.id.create_folder_default_icon);
621                 Drawable folderIconDrawable = folderIconImageView.getDrawable();
622                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
623                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
624             } else {  // Assign `favoriteIcon` from the `WebView`.
625                 folderIconBitmap = MainWebViewActivity.favoriteIcon;
626             }
627
628             // Convert `folderIconBitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
629             ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
630             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
631             byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
632
633             // Move all the bookmarks down one in the display order.
634             for (int i = 0; i < bookmarksListView.getCount(); i++) {
635                 int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
636                 bookmarksDatabaseHelper.updateBookmarkDisplayOrder(databaseId, i + 1);
637             }
638
639             // Create the folder, placing it at the top of the ListView
640             bookmarksDatabaseHelper.createFolder(folderNameString, 0, currentFolder, folderIconByteArray);
641
642             // Refresh the ListView.
643             updateBookmarksListView(currentFolder);
644         }
645     }
646
647     @Override
648     public void onSaveEditBookmark(AppCompatDialogFragment dialogFragment) {
649         // Get a long array with the the databaseId of the selected bookmark and convert it to an `int`.
650         long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
651         int selectedBookmarkDatabaseId = (int) selectedBookmarksLongArray[0];
652
653         // Get the `EditText`s from the `editBookmarkDialogFragment` and extract the strings.
654         EditText editBookmarkNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_name_edittext);
655         String bookmarkNameString = editBookmarkNameEditText.getText().toString();
656         EditText editBookmarkUrlEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_url_edittext);
657         String bookmarkUrlString = editBookmarkUrlEditText.getText().toString();
658
659         // Get `edit_bookmark_current_icon_radiobutton`.
660         RadioButton currentBookmarkIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_bookmark_current_icon_radiobutton);
661
662         if (currentBookmarkIconRadioButton.isChecked()) {  // Update the bookmark without changing the favorite icon.
663             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString);
664         } else {  // Update the bookmark using the `WebView` favorite icon.
665             ByteArrayOutputStream newFavoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
666             MainWebViewActivity.favoriteIcon.compress(Bitmap.CompressFormat.PNG, 0, newFavoriteIconByteArrayOutputStream);
667             byte[] newFavoriteIconByteArray = newFavoriteIconByteArrayOutputStream.toByteArray();
668
669             //  Update the bookmark and the favorite icon.
670             bookmarksDatabaseHelper.updateBookmark(selectedBookmarkDatabaseId, bookmarkNameString, bookmarkUrlString, newFavoriteIconByteArray);
671         }
672
673         // Close the contextual action mode.
674         contextualActionMode.finish();
675
676         // Refresh the `ListView`.  `setSelection` scrolls to the position of the bookmark that was edited.
677         updateBookmarksListView(currentFolder);
678         bookmarksListView.setSelection(selectedBookmarkPosition);
679     }
680
681     @Override
682     public void onSaveEditBookmarkFolder(AppCompatDialogFragment dialogFragment) {
683         // Get the new folder name.
684         EditText editFolderNameEditText = (EditText) dialogFragment.getDialog().findViewById(R.id.edit_folder_name_edittext);
685         String newFolderNameString = editFolderNameEditText.getText().toString();
686
687         // Check to see if the new folder name is unique.
688         Cursor bookmarkFolderCursor = bookmarksDatabaseHelper.getFolderCursor(newFolderNameString);
689         int existingFoldersWithNewName = bookmarkFolderCursor.getCount();
690         bookmarkFolderCursor.close();
691         if ( ((existingFoldersWithNewName == 0) || newFolderNameString.equals(oldFolderNameString)) && !newFolderNameString.isEmpty()) {
692             // Get a long array with the the database ID of the selected folder and convert it to an `int`.
693             long[] selectedFolderLongArray = bookmarksListView.getCheckedItemIds();
694             int selectedFolderDatabaseId = (int) selectedFolderLongArray[0];
695
696             // Get the `RadioButtons` from the `Dialog`.
697             RadioButton currentFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_folder_current_icon_radiobutton);
698             RadioButton defaultFolderIconRadioButton = (RadioButton) dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon_radiobutton);
699
700             // Check if the favorite icon has changed.
701             if (currentFolderIconRadioButton.isChecked()) {
702                 // Update the folder name if it has changed without modifying the favorite icon.
703                 if (!newFolderNameString.equals(oldFolderNameString)) {
704                     bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
705
706                     // Refresh the `ListView`.  `setSelection` scrolls to the position of the folder that was edited.
707                     updateBookmarksListView(currentFolder);
708                     bookmarksListView.setSelection(selectedBookmarkPosition);
709                 }
710             } else {  // Update the folder icon.
711                 // Get the new folder icon `Bitmap`.
712                 Bitmap folderIconBitmap;
713                 if (defaultFolderIconRadioButton.isChecked()) {
714                     // Get the default folder icon `ImageView` from the `Drawable` and convert it to a `Bitmap`.
715                     ImageView folderIconImageView = (ImageView) dialogFragment.getDialog().findViewById(R.id.edit_folder_default_icon);
716                     Drawable folderIconDrawable = folderIconImageView.getDrawable();
717                     BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
718                     folderIconBitmap = folderIconBitmapDrawable.getBitmap();
719                 } else {  // Get the web page icon `ImageView` from the `Dialog`.
720                     folderIconBitmap = MainWebViewActivity.favoriteIcon;
721                 }
722
723                 // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
724                 ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
725                 folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
726                 byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
727
728                 bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, folderIconByteArray);
729
730                 // Refresh the `ListView`.  `setSelection` scrolls to the position of the folder that was edited.
731                 updateBookmarksListView(currentFolder);
732                 bookmarksListView.setSelection(selectedBookmarkPosition);
733             }
734         } else {  // Don't edit the folder because the new name is not unique.
735             String cannot_rename_folder = getResources().getString(R.string.cannot_save_folder) + " \"" + newFolderNameString + "\"";
736             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), cannot_rename_folder, Snackbar.LENGTH_INDEFINITE).show();
737         }
738
739         // Close the contextual action mode.
740         contextualActionMode.finish();
741     }
742
743     @Override
744     public void onMoveToFolder(AppCompatDialogFragment dialogFragment) {
745         // Get the new folder database id.
746         ListView folderListView = (ListView) dialogFragment.getDialog().findViewById(R.id.move_to_folder_listview);
747         long[] newFolderLongArray = folderListView.getCheckedItemIds();
748
749         if (newFolderLongArray.length == 0) {  // No new folder was selected.
750             Snackbar.make(findViewById(R.id.bookmarks_coordinatorlayout), getString(R.string.cannot_move_bookmarks), Snackbar.LENGTH_INDEFINITE).show();
751         } else {  // Move the selected bookmarks.
752             // Get the new folder database ID.
753             int newFolderDatabaseId = (int) newFolderLongArray[0];
754
755             // Instantiate `newFolderName`.
756             String newFolderName;
757
758             if (newFolderDatabaseId == 0) {
759                 // The new folder is the home folder, represented as `""` in the database.
760                 newFolderName = "";
761             } else {
762                 // Get the new folder name from the database.
763                 newFolderName = bookmarksDatabaseHelper.getFolderName(newFolderDatabaseId);
764             }
765
766             // Get a long array with the the database ID of the selected bookmarks.
767             long[] selectedBookmarksLongArray = bookmarksListView.getCheckedItemIds();
768             for (long databaseIdLong : selectedBookmarksLongArray) {
769                 // Get `databaseIdInt` for each selected bookmark.
770                 int databaseIdInt = (int) databaseIdLong;
771
772                 // Move the selected bookmark to the new folder.
773                 bookmarksDatabaseHelper.moveToFolder(databaseIdInt, newFolderName);
774             }
775
776             // Refresh the `ListView`.
777             updateBookmarksListView(currentFolder);
778
779             // Close the contextual app bar.
780             contextualActionMode.finish();
781         }
782     }
783
784     private void updateBookmarksListView(String folderName) {
785         // Get a `Cursor` with the current contents of the bookmarks database.
786         bookmarksCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(folderName);
787
788         // Setup `bookmarksCursorAdapter` with `this` context.  `false` disables `autoRequery`.
789         CursorAdapter bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
790             @Override
791             public View newView(Context context, Cursor cursor, ViewGroup parent) {
792                 // Inflate the individual item layout.  `false` does not attach it to the root.
793                 return getLayoutInflater().inflate(R.layout.bookmarks_item_linearlayout, parent, false);
794             }
795
796             @Override
797             public void bindView(View view, Context context, Cursor cursor) {
798                 // Get the favorite icon byte array from the `Cursor`.
799                 byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
800
801                 // Convert the byte array to a `Bitmap` beginning at the first byte and ending at the last.
802                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
803
804                 // Display the bitmap in `bookmarkFavoriteIcon`.
805                 ImageView bookmarkFavoriteIcon = (ImageView) view.findViewById(R.id.bookmark_favorite_icon);
806                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
807
808
809                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
810                 String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
811                 TextView bookmarkNameTextView = (TextView) view.findViewById(R.id.bookmark_name);
812                 bookmarkNameTextView.setText(bookmarkNameString);
813
814                 // Make the font bold for folders.
815                 if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
816                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT_BOLD);
817                 } else {  // Reset the font to default for normal bookmarks.
818                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
819                 }
820             }
821         };
822
823         // Update the ListView.
824         bookmarksListView.setAdapter(bookmarksCursorAdapter);
825
826         // Set the AppBar title.
827         if (currentFolder.isEmpty()) {
828             appBar.setTitle(R.string.bookmarks);
829         } else {
830             appBar.setTitle(currentFolder);
831         }
832     }
833
834     private void updateBookmarksListViewExcept(long[] exceptIdLongArray, String folderName) {
835         // Get a `Cursor` with the current contents of the bookmarks database except for the specified database IDs.
836         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksCursorExcept(exceptIdLongArray, folderName);
837
838         // Setup `bookmarksCursorAdapter` with `this` context.  `false` disables autoRequery.
839         CursorAdapter bookmarksCursorAdapter = new CursorAdapter(this, bookmarksCursor, false) {
840             @Override
841             public View newView(Context context, Cursor cursor, ViewGroup parent) {
842                 // Inflate the individual item layout.  `false` does not attach it to the root.
843                 return getLayoutInflater().inflate(R.layout.bookmarks_item_linearlayout, parent, false);
844             }
845
846             @Override
847             public void bindView(View view, Context context, Cursor cursor) {
848                 // Get the favorite icon byte array from the cursor.
849                 byte[] favoriteIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
850
851                 // Convert the byte array to a Bitmap beginning at the first byte and ending at the last.
852                 Bitmap favoriteIconBitmap = BitmapFactory.decodeByteArray(favoriteIconByteArray, 0, favoriteIconByteArray.length);
853
854                 // Display the bitmap in `bookmarkFavoriteIcon`.
855                 ImageView bookmarkFavoriteIcon = (ImageView) view.findViewById(R.id.bookmark_favorite_icon);
856                 bookmarkFavoriteIcon.setImageBitmap(favoriteIconBitmap);
857
858
859                 // Get the bookmark name from the cursor and display it in `bookmarkNameTextView`.
860                 String bookmarkNameString = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
861                 TextView bookmarkNameTextView = (TextView) view.findViewById(R.id.bookmark_name);
862                 bookmarkNameTextView.setText(bookmarkNameString);
863
864                 // Make the font bold for folders.
865                 if (cursor.getInt(cursor.getColumnIndex(BookmarksDatabaseHelper.IS_FOLDER)) == 1) {
866                     // The first argument is `null` because we don't want to change the font.
867                     bookmarkNameTextView.setTypeface(null, Typeface.BOLD);
868                 } else {  // Reset the font to default.
869                     bookmarkNameTextView.setTypeface(Typeface.DEFAULT);
870                 }
871             }
872         };
873
874         // Update the `ListView`.
875         bookmarksListView.setAdapter(bookmarksCursorAdapter);
876     }
877
878     private void deleteBookmarkFolderContents(int databaseId) {
879         // Get the name of the folder.
880         String folderName = bookmarksDatabaseHelper.getFolderName(databaseId);
881
882         // Get the contents of the folder.
883         Cursor folderCursor = bookmarksDatabaseHelper.getAllBookmarksCursorByDisplayOrder(folderName);
884
885         for (int i = 0; i < folderCursor.getCount(); i++) {
886             // Move `folderCursor` to the current row.
887             folderCursor.moveToPosition(i);
888
889             // Get the database ID of the item.
890             int itemDatabaseId = folderCursor.getInt(folderCursor.getColumnIndex(BookmarksDatabaseHelper._ID));
891
892             // If this is a folder, delete the contents first.
893             if (bookmarksDatabaseHelper.isFolder(itemDatabaseId)) {
894                 deleteBookmarkFolderContents(itemDatabaseId);
895             }
896
897             bookmarksDatabaseHelper.deleteBookmark(itemDatabaseId);
898         }
899     }
900 }