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