2 * Copyright © 2016-2019 Soren Stoutner <soren@stoutner.com>.
4 * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
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.
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.
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/>.
20 package com.stoutner.privacybrowser.dialogs;
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.graphics.Bitmap;
29 import android.graphics.BitmapFactory;
30 import android.os.Bundle;
31 import android.text.Editable;
32 import android.text.TextWatcher;
33 import android.view.KeyEvent;
34 import android.view.View;
35 import android.view.WindowManager;
36 import android.widget.Button;
37 import android.widget.EditText;
38 import android.widget.ImageView;
39 import android.widget.RadioButton;
40 import android.widget.RadioGroup;
42 import androidx.annotation.NonNull;
43 import androidx.fragment.app.DialogFragment; // The AndroidX dialog fragment must be used or an error is produced on API <=22.
45 import com.stoutner.privacybrowser.R;
46 import com.stoutner.privacybrowser.activities.MainWebViewActivity;
47 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
49 public class EditBookmarkFolderDialog extends DialogFragment {
50 // Instantiate the class variable.
51 private EditBookmarkFolderListener editBookmarkFolderListener;
53 // The public interface is used to send information back to the parent activity.
54 public interface EditBookmarkFolderListener {
55 void onSaveBookmarkFolder(DialogFragment dialogFragment, int selectedFolderDatabaseId);
58 public void onAttach(Context context) {
59 // Run the default commands.
60 super.onAttach(context);
62 // Get a handle for `EditFolderListener` from the launching context.
63 editBookmarkFolderListener = (EditBookmarkFolderListener) context;
66 // Store the database ID in the arguments bundle.
67 public static EditBookmarkFolderDialog folderDatabaseId(int databaseId) {
69 Bundle bundle = new Bundle();
71 // Store the folder database ID in the bundle.
72 bundle.putInt("Database ID", databaseId);
74 // Add the bundle to the dialog.
75 EditBookmarkFolderDialog editBookmarkFolderDialog = new EditBookmarkFolderDialog();
76 editBookmarkFolderDialog.setArguments(bundle);
78 // Return the new dialog.
79 return editBookmarkFolderDialog;
82 // `@SuppressLing("InflateParams")` removes the warning about using `null` as the parent view group when inflating the `AlertDialog`.
83 @SuppressLint("InflateParams")
86 public Dialog onCreateDialog(Bundle savedInstanceState) {
87 // Remove the incorrect lint warning that `getInt()` might be null.
88 assert getArguments() != null;
90 // Store the folder database ID in the class variable.
91 int selectedFolderDatabaseId = getArguments().getInt("Database ID");
93 // Initialize the database helper. The two `nulls` do not specify the database name or a `CursorFactory`. The `0` specifies a database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
94 final BookmarksDatabaseHelper bookmarksDatabaseHelper = new BookmarksDatabaseHelper(getContext(), null, null, 0);
96 // Get a cursor with the selected folder and move it to the first position.
97 Cursor folderCursor = bookmarksDatabaseHelper.getBookmark(selectedFolderDatabaseId);
98 folderCursor.moveToFirst();
100 // Use an alert dialog builder to create the alert dialog.
101 AlertDialog.Builder dialogBuilder;
103 // Set the style according to the theme.
104 if (MainWebViewActivity.darkTheme) {
105 dialogBuilder = new AlertDialog.Builder(getActivity(), R.style.PrivacyBrowserAlertDialogDark);
107 dialogBuilder = new AlertDialog.Builder(getActivity(), R.style.PrivacyBrowserAlertDialogLight);
111 dialogBuilder.setTitle(R.string.edit_folder);
113 // Remove the incorrect lint warning that `getActivity()` might be null.
114 assert getActivity() != null;
116 // Set the view. The parent view is `null` because it will be assigned by `AlertDialog`.
117 dialogBuilder.setView(getActivity().getLayoutInflater().inflate(R.layout.edit_bookmark_folder_dialog, null));
119 // Set the listener for the negative button.
120 dialogBuilder.setNegativeButton(R.string.cancel, (DialogInterface dialog, int which) -> {
121 // Do nothing. The `AlertDialog` will close automatically.
124 // Set the listener fo the positive button.
125 dialogBuilder.setPositiveButton(R.string.save, (DialogInterface dialog, int which) -> {
126 // Return the `DialogFragment` to the parent activity on save.
127 editBookmarkFolderListener.onSaveBookmarkFolder(EditBookmarkFolderDialog.this, selectedFolderDatabaseId);
130 // Create an alert dialog from the alert dialog builder.
131 final AlertDialog alertDialog = dialogBuilder.create();
133 // Remove the warning below that `getWindow()` might be null.
134 assert alertDialog.getWindow() != null;
136 // Disable screenshots if not allowed.
137 if (!MainWebViewActivity.allowScreenshots) {
138 alertDialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
141 // The alert dialog must be shown before items in the layout can be modified.
144 // Get handles for the views in the alert dialog.
145 RadioGroup iconRadioGroup = alertDialog.findViewById(R.id.edit_folder_icon_radio_group);
146 final RadioButton currentIconRadioButton = alertDialog.findViewById(R.id.edit_folder_current_icon_radiobutton);
147 ImageView currentIconImageView = alertDialog.findViewById(R.id.edit_folder_current_icon_imageview);
148 ImageView webPageFavoriteIconImageView = alertDialog.findViewById(R.id.edit_folder_web_page_favorite_icon_imageview);
149 final EditText folderNameEditText = alertDialog.findViewById(R.id.edit_folder_name_edittext);
150 final Button editButton = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE);
152 // Initially disable the edit button.
153 editButton.setEnabled(false);
155 // Get the current favorite icon byte array from the Cursor.
156 byte[] currentIconByteArray = folderCursor.getBlob(folderCursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
158 // Convert the byte array to a bitmap beginning at the first byte and ending at the last.
159 Bitmap currentIconBitmap = BitmapFactory.decodeByteArray(currentIconByteArray, 0, currentIconByteArray.length);
161 // Display the current icon bitmap.
162 currentIconImageView.setImageBitmap(currentIconBitmap);
164 // Get a copy of the favorite icon bitmap.
165 Bitmap favoriteIconBitmap = MainWebViewActivity.favoriteIconBitmap;
167 // Scale the favorite icon bitmap down if it is larger than 256 x 256. Filtering uses bilinear interpolation.
168 if ((favoriteIconBitmap.getHeight() > 256) || (favoriteIconBitmap.getWidth() > 256)) {
169 favoriteIconBitmap = Bitmap.createScaledBitmap(favoriteIconBitmap, 256, 256, true);
172 // Set the new favorite icon bitmap.
173 webPageFavoriteIconImageView.setImageBitmap(favoriteIconBitmap);
175 // Get the current folder name.
176 final String currentFolderName = folderCursor.getString(folderCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
178 // Display the current folder name in `edit_folder_name_edittext`.
179 folderNameEditText.setText(currentFolderName);
181 // Update the status of the edit button when the folder name is changed.
182 folderNameEditText.addTextChangedListener(new TextWatcher() {
184 public void beforeTextChanged(CharSequence s, int start, int count, int after) {
189 public void onTextChanged(CharSequence s, int start, int before, int count) {
194 public void afterTextChanged(Editable s) {
195 // Convert the current text to a string.
196 String newFolderName = s.toString();
198 // Get a cursor for the new folder name if it exists.
199 Cursor folderExistsCursor = bookmarksDatabaseHelper.getFolder(newFolderName);
201 // Is the new folder name empty?
202 boolean folderNameNotEmpty = !newFolderName.isEmpty();
204 // Does the folder name already exist?
205 boolean folderNameAlreadyExists = (!newFolderName.equals(currentFolderName) && (folderExistsCursor.getCount() > 0));
207 // Has the folder been renamed?
208 boolean folderRenamed = (!newFolderName.equals(currentFolderName) && !folderNameAlreadyExists);
210 // Has the favorite icon changed?
211 boolean iconChanged = (!currentIconRadioButton.isChecked() && !folderNameAlreadyExists);
213 // Enable the create button if something has been edited and the new folder name is valid.
214 editButton.setEnabled(folderNameNotEmpty && (folderRenamed || iconChanged));
218 // Update the status of the edit button when the icon is changed.
219 iconRadioGroup.setOnCheckedChangeListener((RadioGroup group, int checkedId) -> {
220 // Get the new folder name.
221 String newFolderName = folderNameEditText.getText().toString();
223 // Get a cursor for the new folder name if it exists.
224 Cursor folderExistsCursor = bookmarksDatabaseHelper.getFolder(newFolderName);
226 // Is the new folder name empty?
227 boolean folderNameEmpty = newFolderName.isEmpty();
229 // Does the folder name already exist?
230 boolean folderNameAlreadyExists = (!newFolderName.equals(currentFolderName) && (folderExistsCursor.getCount() > 0));
232 // Has the folder been renamed?
233 boolean folderRenamed = (!newFolderName.equals(currentFolderName) && !folderNameAlreadyExists);
235 // Has the favorite icon changed?
236 boolean iconChanged = (!currentIconRadioButton.isChecked() && !folderNameAlreadyExists);
238 // Enable the create button if something has been edited and the new folder name is valid.
239 editButton.setEnabled(!folderNameEmpty && (folderRenamed || iconChanged));
242 // Allow the `enter` key on the keyboard to save the bookmark from `edit_bookmark_name_edittext`.
243 folderNameEditText.setOnKeyListener((View v, int keyCode, KeyEvent event) -> {
244 // If the event is a key-down on the "enter" button, select the PositiveButton `Save`.
245 if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER) && editButton.isEnabled()) { // The enter key was pressed and the edit button is enabled.
246 // Trigger `editBookmarkListener` and return the DialogFragment to the parent activity.
247 editBookmarkFolderListener.onSaveBookmarkFolder(EditBookmarkFolderDialog.this, selectedFolderDatabaseId);
249 // Manually dismiss the `AlertDialog`.
250 alertDialog.dismiss();
252 // Consume the event.
254 } else { // If any other key was pressed, or if the edit button is currently disabled, do not consume the event.
259 // `onCreateDialog` requires the return of an `AlertDialog`.