2 * Copyright © 2019-2020 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.Manifest;
23 import android.annotation.SuppressLint;
24 import android.app.Activity;
25 import android.app.AlertDialog;
26 import android.app.Dialog;
27 import android.content.Context;
28 import android.content.DialogInterface;
29 import android.content.Intent;
30 import android.content.SharedPreferences;
31 import android.content.pm.PackageManager;
32 import android.os.Build;
33 import android.os.Bundle;
34 import android.os.Environment;
35 import android.provider.DocumentsContract;
36 import android.text.Editable;
37 import android.text.TextWatcher;
38 import android.view.View;
39 import android.view.WindowManager;
40 import android.widget.Button;
41 import android.widget.EditText;
42 import android.widget.TextView;
44 import androidx.annotation.NonNull;
45 import androidx.core.content.ContextCompat;
46 import androidx.fragment.app.DialogFragment;
47 import androidx.preference.PreferenceManager;
49 import com.stoutner.privacybrowser.R;
50 import com.stoutner.privacybrowser.activities.MainWebViewActivity;
54 public class OpenDialog extends DialogFragment {
55 // Define the open listener.
56 private OpenListener openListener;
58 // The public interface is used to send information back to the parent activity.
59 public interface OpenListener {
60 void onOpen(DialogFragment dialogFragment);
64 public void onAttach(@NonNull Context context) {
65 // Run the default commands.
66 super.onAttach(context);
68 // Get a handle for the open listener from the launching context.
69 openListener = (OpenListener) context;
72 // `@SuppressLint("InflateParams")` removes the warning about using null as the parent view group when inflating the alert dialog.
73 @SuppressLint("InflateParams")
76 public Dialog onCreateDialog(Bundle savedInstanceState) {
77 // Get a handle for the activity and the context.
78 Activity activity = getActivity();
79 Context context = getContext();
81 // Remove the incorrect lint warnings below that the activity and the context might be null.
82 assert activity != null;
83 assert context != null;
85 // Get a handle for the shared preferences.
86 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
88 // Get the screenshot and theme preferences.
89 boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
90 boolean allowScreenshots = sharedPreferences.getBoolean("allow_screenshots", false);
92 // Use an alert dialog builder to create the alert dialog.
93 AlertDialog.Builder dialogBuilder;
95 // Set the style and icon according to the theme.
98 dialogBuilder = new AlertDialog.Builder(activity, R.style.PrivacyBrowserAlertDialogDark);
101 dialogBuilder.setIcon(R.drawable.proxy_enabled_dark);
104 dialogBuilder = new AlertDialog.Builder(activity, R.style.PrivacyBrowserAlertDialogLight);
107 dialogBuilder.setIcon(R.drawable.proxy_enabled_light);
111 dialogBuilder.setTitle(R.string.open);
113 // Set the view. The parent view is null because it will be assigned by the alert dialog.
114 dialogBuilder.setView(activity.getLayoutInflater().inflate(R.layout.open_dialog, null));
116 // Set the cancel button listener. Using `null` as the listener closes the dialog without doing anything else.
117 dialogBuilder.setNegativeButton(R.string.cancel, null);
119 // Set the open button listener.
120 dialogBuilder.setPositiveButton(R.string.open, (DialogInterface dialog, int which) -> {
121 // Return the dialog fragment to the parent activity.
122 openListener.onOpen(this);
125 // Create an alert dialog from the builder.
126 AlertDialog alertDialog = dialogBuilder.create();
128 // Remove the incorrect lint warning below that the window might be null.
129 assert alertDialog.getWindow() != null;
131 // Disable screenshots if not allowed.
132 if (!allowScreenshots) {
133 alertDialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
136 // The alert dialog must be shown before items in the layout can be modified.
139 // Get handles for the layout items.
140 EditText fileNameEditText = alertDialog.findViewById(R.id.file_name_edittext);
141 Button browseButton = alertDialog.findViewById(R.id.browse_button);
142 TextView fileDoesNotExistTextView = alertDialog.findViewById(R.id.file_does_not_exist_textview);
143 TextView storagePermissionTextView = alertDialog.findViewById(R.id.storage_permission_textview);
144 Button openButton = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE);
146 // Create a string for the default file path.
147 String defaultFilePath;
149 // Update the status of the open button when the file name changes.
150 fileNameEditText.addTextChangedListener(new TextWatcher() {
152 public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
157 public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
162 public void afterTextChanged(Editable editable) {
163 // Get the current file name.
164 String fileNameString = fileNameEditText.getText().toString();
166 // Convert the file name string to a file.
167 File file = new File(fileNameString);
169 // Check to see if the file exists.
170 if (file.exists()) { // The file exists.
171 // Hide the notification that the file does not exist.
172 fileDoesNotExistTextView.setVisibility(View.GONE);
174 // Enable the open button.
175 openButton.setEnabled(true);
176 } else { // The file does not exist.
177 // Show the notification that the file does not exist.
178 fileDoesNotExistTextView.setVisibility(View.VISIBLE);
180 // Disable the open button.
181 openButton.setEnabled(false);
186 // Set the default file path according to the storage permission state.
187 if (ContextCompat.checkSelfPermission(context, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) { // The storage permission has been granted.
188 // Set the default file path to use the external public directory.
189 defaultFilePath = Environment.getExternalStorageDirectory() + "/";
191 // Hide the storage permission text view.
192 storagePermissionTextView.setVisibility(View.GONE);
193 } else { // The storage permission has not been granted.
194 // Set the default file path to use the external private directory.
195 defaultFilePath = context.getExternalFilesDir(null) + "/";
198 // Display the default file path.
199 fileNameEditText.setText(defaultFilePath);
201 // Move the cursor to the end of the default file path.
202 fileNameEditText.setSelection(defaultFilePath.length());
204 // Handle clicks on the browse button.
205 browseButton.setOnClickListener((View view) -> {
206 // Create the file picker intent.
207 Intent browseIntent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
209 // Set the intent MIME type to include all files so that everything is visible.
210 browseIntent.setType("*/*");
212 // Set the initial directory if the minimum API >= 26.
213 if (Build.VERSION.SDK_INT >= 26) {
214 browseIntent.putExtra(DocumentsContract.EXTRA_INITIAL_URI, Environment.getExternalStorageDirectory());
217 // Start the file picker. This must be started under `activity` to that the request code is returned correctly.
218 activity.startActivityForResult(browseIntent, MainWebViewActivity.BROWSE_OPEN_REQUEST_CODE);
221 // Return the alert dialog.