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[PrivacyBrowserAndroid.git] / app / src / main / java / com / stoutner / privacybrowser / dialogs / MoveToFolderDialog.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.dialogs;
21
22 import android.annotation.SuppressLint;
23 import android.app.AlertDialog;
24 import android.app.Dialog;
25 import android.content.Context;
26 import android.content.DialogInterface;
27 import android.database.Cursor;
28 import android.database.DatabaseUtils;
29 import android.database.MatrixCursor;
30 import android.database.MergeCursor;
31 import android.graphics.Bitmap;
32 import android.graphics.BitmapFactory;
33 import android.graphics.drawable.BitmapDrawable;
34 import android.graphics.drawable.Drawable;
35 import android.os.Bundle;
36 import android.support.annotation.NonNull;
37 import android.support.v4.content.ContextCompat;
38 // We have to use `AppCompatDialogFragment` instead of `DialogFragment` or an error is produced on API <=22.
39 import android.support.v7.app.AppCompatDialogFragment;
40 import android.view.View;
41 import android.view.ViewGroup;
42 import android.widget.CursorAdapter;
43 import android.widget.ImageView;
44 import android.widget.ListView;
45 import android.widget.TextView;
46
47 import com.stoutner.privacybrowser.R;
48 import com.stoutner.privacybrowser.activities.BookmarksActivity;
49 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
50
51 import java.io.ByteArrayOutputStream;
52
53 public class MoveToFolderDialog extends AppCompatDialogFragment {
54     // The public interface is used to send information back to the parent activity.
55     public interface MoveToFolderListener {
56         void onMoveToFolder(AppCompatDialogFragment dialogFragment);
57     }
58
59     // `moveToFolderListener` is used in `onAttach()` and `onCreateDialog`.
60     private MoveToFolderListener moveToFolderListener;
61
62     public void onAttach(Context context) {
63         super.onAttach(context);
64
65         // Get a handle for `MoveToFolderListener` from `parentActivity`.
66         try {
67             moveToFolderListener = (MoveToFolderListener) context;
68         } catch(ClassCastException exception) {
69             throw new ClassCastException(context.toString() + " must implement EditBookmarkFolderListener.");
70         }
71     }
72
73     // `exceptFolders` is used in `onCreateDialog()` and `addSubfoldersToExceptFolders()`.
74     private String exceptFolders;
75
76     // `@SuppressLing("InflateParams")` removes the warning about using `null` as the parent view group when inflating the `AlertDialog`.
77     @SuppressLint("InflateParams")
78     @Override
79     @NonNull
80     public Dialog onCreateDialog(Bundle savedInstanceState) {
81         // Use `AlertDialog.Builder` to create the `AlertDialog`.  The style formats the color of the button text.
82         AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(getActivity(), R.style.LightAlertDialog);
83         dialogBuilder.setTitle(R.string.move_to_folder);
84         // The parent view is `null` because it will be assigned by `AlertDialog`.
85         dialogBuilder.setView(getActivity().getLayoutInflater().inflate(R.layout.move_to_folder_dialog, null));
86
87         // Set an `onClick()` listener for the negative button.
88         dialogBuilder.setNegativeButton(R.string.cancel, new Dialog.OnClickListener() {
89             @Override
90             public void onClick(DialogInterface dialog, int which) {
91                 // Do nothing.  The `AlertDialog` will close automatically.
92             }
93         });
94
95         // Set the `onClick()` listener fo the positive button.
96         dialogBuilder.setPositiveButton(R.string.move, new Dialog.OnClickListener() {
97             @Override
98             public void onClick(DialogInterface dialog, int which) {
99                 // Return the `DialogFragment` to the parent activity on save.
100                 moveToFolderListener.onMoveToFolder(MoveToFolderDialog.this);
101             }
102         });
103
104         // Create an `AlertDialog` from the `AlertDialog.Builder`.
105         final AlertDialog alertDialog = dialogBuilder.create();
106
107         // We need to show the `AlertDialog` before we can modify items in the layout.
108         alertDialog.show();
109
110         // Initialize the `Cursor` and `CursorAdapter` variables.
111         Cursor foldersCursor;
112         CursorAdapter foldersCursorAdapter;
113
114         // Check to see if we are in the `Home Folder`.
115         if (BookmarksActivity.currentFolder.isEmpty()) {  // Don't display `Home Folder` at the top of the `ListView`.
116             // Initialize `exceptFolders`.
117             exceptFolders = "";
118
119             // If a folder is selected, add it and all children to the list of folders not to display.
120             long[] selectedBookmarksLongArray = BookmarksActivity.checkedItemIds;
121             for (long databaseIdLong : selectedBookmarksLongArray) {
122                 // Get `databaseIdInt` for each selected bookmark.
123                 int databaseIdInt = (int) databaseIdLong;
124
125                 // If `databaseIdInt` is a folder.
126                 if (BookmarksActivity.bookmarksDatabaseHelper.isFolder(databaseIdInt)) {
127                     // Get the name of the selected folder.
128                     String folderName = BookmarksActivity.bookmarksDatabaseHelper.getFolderName(databaseIdInt);
129
130                     if (exceptFolders.isEmpty()){
131                         // Add the selected folder to the list of folders not to display.
132                         exceptFolders = DatabaseUtils.sqlEscapeString(folderName);
133                     } else {
134                         // Add the selected folder to the end of the list of folders not to display.
135                         exceptFolders = exceptFolders + "," + DatabaseUtils.sqlEscapeString(folderName);
136                     }
137
138                     // Add the selected folder's subfolders to the list of folders not to display.
139                     addSubfoldersToExceptFolders(folderName);
140                 }
141             }
142
143             // Get a `Cursor` containing the folders to display.
144             foldersCursor = BookmarksActivity.bookmarksDatabaseHelper.getFoldersCursorExcept(exceptFolders);
145
146             // Setup `foldersCursorAdaptor` with `this` context.  `false` disables autoRequery.
147             foldersCursorAdapter = new CursorAdapter(alertDialog.getContext(), foldersCursor, false) {
148                 @Override
149                 public View newView(Context context, Cursor cursor, ViewGroup parent) {
150                     // Inflate the individual item layout.  `false` does not attach it to the root.
151                     return getActivity().getLayoutInflater().inflate(R.layout.move_to_folder_item_linearlayout, parent, false);
152                 }
153
154                 @Override
155                 public void bindView(View view, Context context, Cursor cursor) {
156                     // Get the folder icon from `cursor`.
157                     byte[] folderIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
158                     // Convert the byte array to a `Bitmap` beginning at the first byte and ending at the last.
159                     Bitmap folderIconBitmap = BitmapFactory.decodeByteArray(folderIconByteArray, 0, folderIconByteArray.length);
160                     // Display `folderIconBitmap` in `move_to_folder_icon`.
161                     ImageView folderIconImageView = (ImageView) view.findViewById(R.id.move_to_folder_icon);
162                     folderIconImageView.setImageBitmap(folderIconBitmap);
163
164                     // Get the folder name from `cursor` and display it in `move_to_folder_name_textview`.
165                     String folderName = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
166                     TextView folderNameTextView = (TextView) view.findViewById(R.id.move_to_folder_name_textview);
167                     folderNameTextView.setText(folderName);
168                 }
169             };
170         } else {  // Display `Home Folder` at the top of the `ListView`.
171             // Get the home folder icon drawable and convert it to a `Bitmap`.  `this` specifies the current context.
172             Drawable homeFolderIconDrawable = ContextCompat.getDrawable(getActivity().getApplicationContext(), R.drawable.folder_gray_bitmap);
173             BitmapDrawable homeFolderIconBitmapDrawable = (BitmapDrawable) homeFolderIconDrawable;
174             Bitmap homeFolderIconBitmap = homeFolderIconBitmapDrawable.getBitmap();
175             // Convert the folder `Bitmap` to a byte array.  `0` is for lossless compression (the only option for a PNG).
176             ByteArrayOutputStream homeFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
177             homeFolderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, homeFolderIconByteArrayOutputStream);
178             byte[] homeFolderIconByteArray = homeFolderIconByteArrayOutputStream.toByteArray();
179
180             // Setup a `MatrixCursor` for the `Home Folder`.
181             String[] homeFolderMatrixCursorColumnNames = {BookmarksDatabaseHelper._ID, BookmarksDatabaseHelper.BOOKMARK_NAME, BookmarksDatabaseHelper.FAVORITE_ICON};
182             MatrixCursor homeFolderMatrixCursor = new MatrixCursor(homeFolderMatrixCursorColumnNames);
183             homeFolderMatrixCursor.addRow(new Object[]{0, getString(R.string.home_folder), homeFolderIconByteArray});
184
185             // Add the parent folder to the list of folders not to display.
186             exceptFolders = DatabaseUtils.sqlEscapeString(BookmarksActivity.currentFolder);
187
188             // If a folder is selected, add it and all children to the list of folders not to display.
189             long[] selectedBookmarksLongArray = BookmarksActivity.checkedItemIds;
190             for (long databaseIdLong : selectedBookmarksLongArray) {
191                 // Get `databaseIdInt` for each selected bookmark.
192                 int databaseIdInt = (int) databaseIdLong;
193
194                 // If `databaseIdInt` is a folder.
195                 if (BookmarksActivity.bookmarksDatabaseHelper.isFolder(databaseIdInt)) {
196                     // Get the name of the selected folder.
197                     String folderName = BookmarksActivity.bookmarksDatabaseHelper.getFolderName(databaseIdInt);
198
199                     // Add the selected folder to the end of the list of folders not to display.
200                     exceptFolders = exceptFolders + "," + DatabaseUtils.sqlEscapeString(folderName);
201
202                     // Add the selected folder's subfolders to the list of folders not to display.
203                     addSubfoldersToExceptFolders(folderName);
204                 }
205             }
206
207             // Get a `foldersCursor`.
208             foldersCursor = BookmarksActivity.bookmarksDatabaseHelper.getFoldersCursorExcept(exceptFolders);
209
210             // Combine `homeFolderMatrixCursor` and `foldersCursor`.
211             MergeCursor foldersMergeCursor = new MergeCursor(new Cursor[]{homeFolderMatrixCursor, foldersCursor});
212
213             // Setup `foldersCursorAdaptor` with `this` context.  `false` disables autoRequery.
214             foldersCursorAdapter = new CursorAdapter(alertDialog.getContext(), foldersMergeCursor, false) {
215                 @Override
216                 public View newView(Context context, Cursor cursor, ViewGroup parent) {
217                     // Inflate the individual item layout.  `false` does not attach it to the root.
218                     return getActivity().getLayoutInflater().inflate(R.layout.move_to_folder_item_linearlayout, parent, false);
219                 }
220
221                 @Override
222                 public void bindView(View view, Context context, Cursor cursor) {
223                     // Get the folder icon from `cursor`.
224                     byte[] folderIconByteArray = cursor.getBlob(cursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
225                     // Convert the byte array to a `Bitmap` beginning at the first byte and ending at the last.
226                     Bitmap folderIconBitmap = BitmapFactory.decodeByteArray(folderIconByteArray, 0, folderIconByteArray.length);
227                     // Display `folderIconBitmap` in `move_to_folder_icon`.
228                     ImageView folderIconImageView = (ImageView) view.findViewById(R.id.move_to_folder_icon);
229                     folderIconImageView.setImageBitmap(folderIconBitmap);
230
231                     // Get the folder name from `cursor` and display it in `move_to_folder_name_textview`.
232                     String folderName = cursor.getString(cursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
233                     TextView folderNameTextView = (TextView) view.findViewById(R.id.move_to_folder_name_textview);
234                     folderNameTextView.setText(folderName);
235                 }
236             };
237         }
238
239         // Display the ListView
240         ListView foldersListView = (ListView) alertDialog.findViewById(R.id.move_to_folder_listview);
241         foldersListView.setAdapter(foldersCursorAdapter);
242
243         // `onCreateDialog` requires the return of an `AlertDialog`.
244         return alertDialog;
245     }
246
247     private void addSubfoldersToExceptFolders(String folderName) {
248         // Get a `Cursor` will all the immediate subfolders.
249         Cursor subfoldersCursor = BookmarksActivity.bookmarksDatabaseHelper.getSubfoldersCursor(folderName);
250
251         for (int i = 0; i < subfoldersCursor.getCount(); i++) {
252             // Move `subfolderCursor` to the current item.
253             subfoldersCursor.moveToPosition(i);
254
255             // Get the name of the subfolder.
256             String subfolderName = subfoldersCursor.getString(subfoldersCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
257
258             // Run the same tasks for any subfolders of the subfolder.
259             addSubfoldersToExceptFolders(subfolderName);
260
261             // Add the subfolder to `exceptFolders`.
262             subfolderName = DatabaseUtils.sqlEscapeString(subfolderName);
263             exceptFolders = exceptFolders + "," + subfolderName;
264         }
265
266     }
267 }