2 * Copyright © 2016-2018 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.support.annotation.NonNull;
32 // `AppCompatDialogFragment` is required instead of `DialogFragment` or an error is produced on API <=22.
33 import android.support.v7.app.AppCompatDialogFragment;
34 import android.text.Editable;
35 import android.text.TextWatcher;
36 import android.view.KeyEvent;
37 import android.view.View;
38 import android.view.WindowManager;
39 import android.widget.Button;
40 import android.widget.EditText;
41 import android.widget.ImageView;
42 import android.widget.RadioButton;
43 import android.widget.RadioGroup;
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 AppCompatDialogFragment {
50 // The public interface is used to send information back to the parent activity.
51 public interface EditBookmarkFolderListener {
52 void onSaveBookmarkFolder(AppCompatDialogFragment dialogFragment, int selectedFolderDatabaseId);
55 // Instantiate the class variables.
56 private EditBookmarkFolderListener editBookmarkFolderListener;
57 private int selectedFolderDatabaseId;
59 public void onAttach(Context context) {
60 // Run the default commands.
61 super.onAttach(context);
63 // Get a handle for `EditFolderListener` from `parentActivity`.
65 editBookmarkFolderListener = (EditBookmarkFolderListener) context;
66 } catch(ClassCastException exception) {
67 throw new ClassCastException(context.toString() + " must implement EditBookmarkFolderListener.");
71 // Store the database ID in the arguments bundle.
72 public static EditBookmarkFolderDialog folderDatabaseId(int databaseId) {
74 Bundle bundle = new Bundle();
76 // Store the folder database ID in the bundle.
77 bundle.putInt("Database ID", databaseId);
79 // Add the bundle to the dialog.
80 EditBookmarkFolderDialog editBookmarkFolderDialog = new EditBookmarkFolderDialog();
81 editBookmarkFolderDialog.setArguments(bundle);
83 // Return the new dialog.
84 return editBookmarkFolderDialog;
88 public void onCreate(Bundle savedInstanceState) {
89 // Run the default commands.
90 super.onCreate(savedInstanceState);
92 // Remove the incorrect lint warning that `getInt()` might be null.
93 assert getArguments() != null;
95 // Store the folder database ID in the class variable.
96 selectedFolderDatabaseId = getArguments().getInt("Database ID");
99 // `@SuppressLing("InflateParams")` removes the warning about using `null` as the parent view group when inflating the `AlertDialog`.
100 @SuppressLint("InflateParams")
103 public Dialog onCreateDialog(Bundle savedInstanceState) {
104 // 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`.
105 final BookmarksDatabaseHelper bookmarksDatabaseHelper = new BookmarksDatabaseHelper(getContext(), null, null, 0);
107 // Get a `Cursor` with the selected folder and move it to the first position.
108 Cursor folderCursor = bookmarksDatabaseHelper.getBookmarkCursor(selectedFolderDatabaseId);
109 folderCursor.moveToFirst();
111 // Use an alert dialog builder to create the alert dialog.
112 AlertDialog.Builder dialogBuilder;
114 // Set the style according to the theme.
115 if (MainWebViewActivity.darkTheme) {
116 dialogBuilder = new AlertDialog.Builder(getActivity(), R.style.PrivacyBrowserAlertDialogDark);
118 dialogBuilder = new AlertDialog.Builder(getActivity(), R.style.PrivacyBrowserAlertDialogLight);
122 dialogBuilder.setTitle(R.string.edit_folder);
124 // Remove the incorrect lint warning that `getActivity()` might be null.
125 assert getActivity() != null;
127 // Set the view. The parent view is `null` because it will be assigned by `AlertDialog`.
128 dialogBuilder.setView(getActivity().getLayoutInflater().inflate(R.layout.edit_bookmark_folder_dialog, null));
130 // Set the listener for the negative button.
131 dialogBuilder.setNegativeButton(R.string.cancel, (DialogInterface dialog, int which) -> {
132 // Do nothing. The `AlertDialog` will close automatically.
135 // Set the listener fo the positive button.
136 dialogBuilder.setPositiveButton(R.string.save, (DialogInterface dialog, int which) -> {
137 // Return the `DialogFragment` to the parent activity on save.
138 editBookmarkFolderListener.onSaveBookmarkFolder(EditBookmarkFolderDialog.this, selectedFolderDatabaseId);
141 // Create an alert dialog from the alert dialog builder.
142 final AlertDialog alertDialog = dialogBuilder.create();
144 // Remove the warning below that `getWindow()` might be null.
145 assert alertDialog.getWindow() != null;
147 // Disable screenshots if not allowed.
148 if (!MainWebViewActivity.allowScreenshots) {
149 alertDialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
152 // Show the keyboard when the dialog is displayed on the screen.
153 alertDialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
155 // The alert dialog must be shown before items in the layout can be modified.
158 // Get handles for layout items in the `AlertDialog`.
159 final Button editButton = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE);
160 final RadioButton currentIconRadioButton = alertDialog.findViewById(R.id.edit_folder_current_icon_radiobutton);
161 RadioGroup iconRadioGroup = alertDialog.findViewById(R.id.edit_folder_icon_radio_group);
163 // Initially disable the edit button.
164 editButton.setEnabled(false);
166 // Get the current favorite icon byte array from the `Cursor`.
167 byte[] currentIconByteArray = folderCursor.getBlob(folderCursor.getColumnIndex(BookmarksDatabaseHelper.FAVORITE_ICON));
168 // Convert the byte array to a `Bitmap` beginning at the first byte and ending at the last.
169 Bitmap currentIconBitmap = BitmapFactory.decodeByteArray(currentIconByteArray, 0, currentIconByteArray.length);
170 // Display `currentIconBitmap` in `edit_folder_current_icon`.
171 ImageView currentIconImageView = alertDialog.findViewById(R.id.edit_folder_current_icon_imageview);
172 currentIconImageView.setImageBitmap(currentIconBitmap);
174 // Get a `Bitmap` of the favorite icon from `MainWebViewActivity` and display it in `edit_folder_web_page_favorite_icon`.
175 ImageView webPageFavoriteIconImageView = alertDialog.findViewById(R.id.edit_folder_web_page_favorite_icon_imageview);
176 webPageFavoriteIconImageView.setImageBitmap(MainWebViewActivity.favoriteIconBitmap);
178 // Get the current folder name.
179 final String currentFolderName = folderCursor.getString(folderCursor.getColumnIndex(BookmarksDatabaseHelper.BOOKMARK_NAME));
181 // Display the current folder name in `edit_folder_name_edittext`.
182 final EditText folderNameEditText = alertDialog.findViewById(R.id.edit_folder_name_edittext);
183 folderNameEditText.setText(currentFolderName);
185 // Update the status of the edit button when the folder name is changed.
186 folderNameEditText.addTextChangedListener(new TextWatcher() {
188 public void beforeTextChanged(CharSequence s, int start, int count, int after) {
193 public void onTextChanged(CharSequence s, int start, int before, int count) {
198 public void afterTextChanged(Editable s) {
199 // Convert the current text to a string.
200 String newFolderName = s.toString();
202 // Get a cursor for the new folder name if it exists.
203 Cursor folderExistsCursor = bookmarksDatabaseHelper.getFolderCursor(newFolderName);
205 // Is the new folder name empty?
206 boolean folderNameNotEmpty = !newFolderName.isEmpty();
208 // Does the folder name already exist?
209 boolean folderNameAlreadyExists = (!newFolderName.equals(currentFolderName) && (folderExistsCursor.getCount() > 0));
211 // Has the folder been renamed?
212 boolean folderRenamed = (!newFolderName.equals(currentFolderName) && !folderNameAlreadyExists);
214 // Has the favorite icon changed?
215 boolean iconChanged = (!currentIconRadioButton.isChecked() && !folderNameAlreadyExists);
217 // Enable the create button if something has been edited and the new folder name is valid.
218 editButton.setEnabled(folderNameNotEmpty && (folderRenamed || iconChanged));
222 // Update the status of the edit button when the icon is changed.
223 iconRadioGroup.setOnCheckedChangeListener((RadioGroup group, int checkedId) -> {
224 // Get the new folder name.
225 String newFolderName = folderNameEditText.getText().toString();
227 // Get a cursor for the new folder name if it exists.
228 Cursor folderExistsCursor = bookmarksDatabaseHelper.getFolderCursor(newFolderName);
230 // Is the new folder name empty?
231 boolean folderNameEmpty = newFolderName.isEmpty();
233 // Does the folder name already exist?
234 boolean folderNameAlreadyExists = (!newFolderName.equals(currentFolderName) && (folderExistsCursor.getCount() > 0));
236 // Has the folder been renamed?
237 boolean folderRenamed = (!newFolderName.equals(currentFolderName) && !folderNameAlreadyExists);
239 // Has the favorite icon changed?
240 boolean iconChanged = (!currentIconRadioButton.isChecked() && !folderNameAlreadyExists);
242 // Enable the create button if something has been edited and the new folder name is valid.
243 editButton.setEnabled(!folderNameEmpty && (folderRenamed || iconChanged));
246 // Allow the `enter` key on the keyboard to save the bookmark from `edit_bookmark_name_edittext`.
247 folderNameEditText.setOnKeyListener((View v, int keyCode, KeyEvent event) -> {
248 // If the event is a key-down on the "enter" button, select the PositiveButton `Save`.
249 if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER) && editButton.isEnabled()) { // The enter key was pressed and the edit button is enabled.
250 // Trigger `editBookmarkListener` and return the DialogFragment to the parent activity.
251 editBookmarkFolderListener.onSaveBookmarkFolder(EditBookmarkFolderDialog.this, selectedFolderDatabaseId);
253 // Manually dismiss the `AlertDialog`.
254 alertDialog.dismiss();
256 // Consume the event.
258 } else { // If any other key was pressed, or if the edit button is currently disabled, do not consume the event.
263 // `onCreateDialog` requires the return of an `AlertDialog`.