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.Dialog;
26 import android.content.Context;
27 import android.content.DialogInterface;
28 import android.content.Intent;
29 import android.content.SharedPreferences;
30 import android.content.pm.PackageManager;
31 import android.content.res.Configuration;
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.appcompat.app.AlertDialog;
46 import androidx.core.content.ContextCompat;
47 import androidx.fragment.app.DialogFragment;
48 import androidx.preference.PreferenceManager;
50 import com.stoutner.privacybrowser.R;
51 import com.stoutner.privacybrowser.activities.MainWebViewActivity;
52 import com.stoutner.privacybrowser.helpers.DownloadLocationHelper;
56 public class OpenDialog extends DialogFragment {
57 // Define the open listener.
58 private OpenListener openListener;
60 // The public interface is used to send information back to the parent activity.
61 public interface OpenListener {
62 void onOpen(DialogFragment dialogFragment);
66 public void onAttach(@NonNull Context context) {
67 // Run the default commands.
68 super.onAttach(context);
70 // Get a handle for the open listener from the launching context.
71 openListener = (OpenListener) context;
74 // `@SuppressLint("InflateParams")` removes the warning about using null as the parent view group when inflating the alert dialog.
75 @SuppressLint("InflateParams")
78 public Dialog onCreateDialog(Bundle savedInstanceState) {
79 // Get a handle for the activity and the context.
80 Activity activity = requireActivity();
81 Context context = requireContext();
83 // Use an alert dialog builder to create the alert dialog.
84 AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(context, R.style.PrivacyBrowserAlertDialog);
86 // Get the current theme status.
87 int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
89 // Set the icon according to the theme.
90 if (currentThemeStatus == Configuration.UI_MODE_NIGHT_YES) {
91 dialogBuilder.setIcon(R.drawable.proxy_enabled_night);
93 dialogBuilder.setIcon(R.drawable.proxy_enabled_day);
97 dialogBuilder.setTitle(R.string.open);
99 // Set the view. The parent view is null because it will be assigned by the alert dialog.
100 dialogBuilder.setView(activity.getLayoutInflater().inflate(R.layout.open_dialog, null));
102 // Set the cancel button listener. Using `null` as the listener closes the dialog without doing anything else.
103 dialogBuilder.setNegativeButton(R.string.cancel, null);
105 // Set the open button listener.
106 dialogBuilder.setPositiveButton(R.string.open, (DialogInterface dialog, int which) -> {
107 // Return the dialog fragment to the parent activity.
108 openListener.onOpen(this);
111 // Create an alert dialog from the builder.
112 AlertDialog alertDialog = dialogBuilder.create();
114 // Remove the incorrect lint warning below that the window might be null.
115 assert alertDialog.getWindow() != null;
117 // Get a handle for the shared preferences.
118 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
120 // Get the screenshot preference.
121 boolean allowScreenshots = sharedPreferences.getBoolean("allow_screenshots", false);
123 // Disable screenshots if not allowed.
124 if (!allowScreenshots) {
125 alertDialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
128 // The alert dialog must be shown before items in the layout can be modified.
131 // Get handles for the layout items.
132 EditText fileNameEditText = alertDialog.findViewById(R.id.file_name_edittext);
133 Button browseButton = alertDialog.findViewById(R.id.browse_button);
134 TextView fileDoesNotExistTextView = alertDialog.findViewById(R.id.file_does_not_exist_textview);
135 TextView storagePermissionTextView = alertDialog.findViewById(R.id.storage_permission_textview);
136 Button openButton = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE);
138 // Remove the incorrect lint warnings below that the views might be null.
139 assert fileNameEditText != null;
140 assert browseButton != null;
141 assert fileDoesNotExistTextView != null;
142 assert storagePermissionTextView != null;
144 // Update the status of the open button when the file name changes.
145 fileNameEditText.addTextChangedListener(new TextWatcher() {
147 public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
152 public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
157 public void afterTextChanged(Editable editable) {
158 // Get the current file name.
159 String fileNameString = fileNameEditText.getText().toString();
161 // Convert the file name string to a file.
162 File file = new File(fileNameString);
164 // Check to see if the file exists.
165 if (file.exists()) { // The file exists.
166 // Hide the notification that the file does not exist.
167 fileDoesNotExistTextView.setVisibility(View.GONE);
169 // Enable the open button.
170 openButton.setEnabled(true);
171 } else { // The file does not exist.
172 // Show the notification that the file does not exist.
173 fileDoesNotExistTextView.setVisibility(View.VISIBLE);
175 // Disable the open button.
176 openButton.setEnabled(false);
181 // Instantiate the download location helper.
182 DownloadLocationHelper downloadLocationHelper = new DownloadLocationHelper();
184 // Get the default file path.
185 String defaultFilePath = downloadLocationHelper.getDownloadLocation(context) + "/";
187 // Display the default file path.
188 fileNameEditText.setText(defaultFilePath);
190 // Move the cursor to the end of the default file path.
191 fileNameEditText.setSelection(defaultFilePath.length());
193 // Hide the storage permission text view if the permission has already been granted.
194 if (ContextCompat.checkSelfPermission(context, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
195 storagePermissionTextView.setVisibility(View.GONE);
198 // Handle clicks on the browse button.
199 browseButton.setOnClickListener((View view) -> {
200 // Create the file picker intent.
201 Intent browseIntent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
203 // Set the intent MIME type to include all files so that everything is visible.
204 browseIntent.setType("*/*");
206 // Set the initial directory if the minimum API >= 26.
207 if (Build.VERSION.SDK_INT >= 26) {
208 browseIntent.putExtra(DocumentsContract.EXTRA_INITIAL_URI, Environment.getExternalStorageDirectory());
211 // Start the file picker. This must be started under `activity` to that the request code is returned correctly.
212 activity.startActivityForResult(browseIntent, MainWebViewActivity.BROWSE_OPEN_REQUEST_CODE);
215 // Return the alert dialog.