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.os.Bundle;
29 import android.support.annotation.NonNull;
30 // We have to use `AppCompatDialogFragment` instead of `DialogFragment` or an error is produced on API <=22.
31 import android.support.v7.app.AppCompatDialogFragment;
32 import android.text.Editable;
33 import android.text.TextWatcher;
34 import android.view.KeyEvent;
35 import android.view.View;
36 import android.view.WindowManager;
37 import android.widget.Button;
38 import android.widget.EditText;
39 import android.widget.ImageView;
41 import com.stoutner.privacybrowser.R;
42 import com.stoutner.privacybrowser.activities.MainWebViewActivity;
43 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
45 public class CreateBookmarkFolderDialog extends AppCompatDialogFragment {
46 // The public interface is used to send information back to the parent activity.
47 public interface CreateBookmarkFolderListener {
48 void onCreateBookmarkFolder(AppCompatDialogFragment dialogFragment);
51 // `createBookmarkFolderListener` is used in `onAttach()` and `onCreateDialog`.
52 private CreateBookmarkFolderListener createBookmarkFolderListener;
54 public void onAttach(Context context) {
55 super.onAttach(context);
57 // Get a handle for `createBookmarkFolderListener` from `context`.
59 createBookmarkFolderListener = (CreateBookmarkFolderListener) context;
60 } catch(ClassCastException exception) {
61 throw new ClassCastException(context.toString() + " must implement CreateBookmarkFolderListener.");
65 // `@SuppressLing("InflateParams")` removes the warning about using `null` as the parent view group when inflating the `AlertDialog`.
66 @SuppressLint("InflateParams")
69 public Dialog onCreateDialog(Bundle savedInstanceState) {
70 // Use an alert dialog builder to create the alert dialog.
71 AlertDialog.Builder dialogBuilder;
73 // Set the style according to the theme.
74 if (MainWebViewActivity.darkTheme) {
75 dialogBuilder = new AlertDialog.Builder(getActivity(), R.style.PrivacyBrowserAlertDialogDark);
77 dialogBuilder = new AlertDialog.Builder(getActivity(), R.style.PrivacyBrowserAlertDialogLight);
81 dialogBuilder.setTitle(R.string.create_folder);
83 // Remove the warning below that `getLayoutInflater()` might be null.
84 assert getActivity() != null;
86 // Set the view. The parent view is `null` because it will be assigned by the `AlertDialog`.
87 dialogBuilder.setView(getActivity().getLayoutInflater().inflate(R.layout.create_bookmark_folder_dialog, null));
89 // Set an `onClick()` listener for the negative button.
90 dialogBuilder.setNegativeButton(R.string.cancel, (DialogInterface dialog, int which) -> {
91 // Do nothing. The `AlertDialog` will close automatically.
94 // Set an `onClick()` listener fo the positive button.
95 dialogBuilder.setPositiveButton(R.string.create, (DialogInterface dialog, int which) -> {
96 // Return the `DialogFragment` to the parent activity on create.
97 createBookmarkFolderListener.onCreateBookmarkFolder(CreateBookmarkFolderDialog.this);
101 // Create an `AlertDialog` from the `AlertDialog.Builder`.
102 final AlertDialog alertDialog = dialogBuilder.create();
104 // Remove the warning below that `getWindow()` might be null.
105 assert alertDialog.getWindow() != null;
107 // Disable screenshots if not allowed.
108 if (!MainWebViewActivity.allowScreenshots) {
109 alertDialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
112 // Show the keyboard when the `Dialog` is displayed on the screen.
113 alertDialog.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
115 // The `AlertDialog` must be shown before items in the alert dialog can be modified.
118 // Get handles for the views in the dialog.
119 final Button createButton = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE);
120 EditText folderNameEditText = alertDialog.findViewById(R.id.create_folder_name_edittext);
121 ImageView webPageIconImageView = alertDialog.findViewById(R.id.create_folder_web_page_icon);
123 // Initially disable the create button.
124 createButton.setEnabled(false);
126 // Initialize the database helper. The `0` specifies a database version, but that is ignored and set instead using a constant in `BookmarksDatabaseHelper`.
127 final BookmarksDatabaseHelper bookmarksDatabaseHelper = new BookmarksDatabaseHelper(getContext(), null, null, 0);
129 // Enable the create button if the new folder name is unique.
130 folderNameEditText.addTextChangedListener(new TextWatcher() {
132 public void beforeTextChanged(CharSequence s, int start, int count, int after) {
137 public void onTextChanged(CharSequence s, int start, int before, int count) {
142 public void afterTextChanged(Editable s) {
143 // Convert the current text to a string.
144 String folderName = s.toString();
146 // Check if a folder with the name already exists.
147 Cursor folderExistsCursor = bookmarksDatabaseHelper.getFolderCursor(folderName);
149 // Enable the create button if the new folder name is not empty and doesn't already exist.
150 createButton.setEnabled(!folderName.isEmpty() && (folderExistsCursor.getCount() == 0));
154 // Allow the `enter` key on the keyboard to create the folder from `create_folder_name_edittext`.
155 folderNameEditText.setOnKeyListener((View v, int keyCode, KeyEvent event) -> {
156 // If the event is a key-down on the `enter` key, select the `PositiveButton` `Create`.
157 if ((event.getAction() == KeyEvent.ACTION_DOWN) && (keyCode == KeyEvent.KEYCODE_ENTER) && createButton.isEnabled()) { // The enter key was pressed and the create button is enabled.
158 // Trigger `createBookmarkFolderListener` and return the `DialogFragment` to the parent activity.
159 createBookmarkFolderListener.onCreateBookmarkFolder(CreateBookmarkFolderDialog.this);
160 // Manually dismiss the `AlertDialog`.
161 alertDialog.dismiss();
162 // Consume the event.
164 } else { // If any other key was pressed, or if the create button is currently disabled, do not consume the event.
169 // Display the current favorite icon.
170 webPageIconImageView.setImageBitmap(MainWebViewActivity.favoriteIconBitmap);
172 // `onCreateDialog()` requires the return of an `AlertDialog`.