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;
51 import com.stoutner.privacybrowser.helpers.DownloadLocationHelper;
55 public class OpenDialog extends DialogFragment {
56 // Define the open listener.
57 private OpenListener openListener;
59 // The public interface is used to send information back to the parent activity.
60 public interface OpenListener {
61 void onOpen(DialogFragment dialogFragment);
65 public void onAttach(@NonNull Context context) {
66 // Run the default commands.
67 super.onAttach(context);
69 // Get a handle for the open listener from the launching context.
70 openListener = (OpenListener) context;
73 // `@SuppressLint("InflateParams")` removes the warning about using null as the parent view group when inflating the alert dialog.
74 @SuppressLint("InflateParams")
77 public Dialog onCreateDialog(Bundle savedInstanceState) {
78 // Get a handle for the activity and the context.
79 Activity activity = getActivity();
80 Context context = getContext();
82 // Remove the incorrect lint warnings below that the activity and the context might be null.
83 assert activity != null;
84 assert context != null;
86 // Get a handle for the shared preferences.
87 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
89 // Get the screenshot and theme preferences.
90 boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
91 boolean allowScreenshots = sharedPreferences.getBoolean("allow_screenshots", false);
93 // Use an alert dialog builder to create the alert dialog.
94 AlertDialog.Builder dialogBuilder;
96 // Set the style and icon according to the theme.
99 dialogBuilder = new AlertDialog.Builder(activity, R.style.PrivacyBrowserAlertDialogDark);
102 dialogBuilder.setIcon(R.drawable.proxy_enabled_dark);
105 dialogBuilder = new AlertDialog.Builder(activity, R.style.PrivacyBrowserAlertDialogLight);
108 dialogBuilder.setIcon(R.drawable.proxy_enabled_light);
112 dialogBuilder.setTitle(R.string.open);
114 // Set the view. The parent view is null because it will be assigned by the alert dialog.
115 dialogBuilder.setView(activity.getLayoutInflater().inflate(R.layout.open_dialog, null));
117 // Set the cancel button listener. Using `null` as the listener closes the dialog without doing anything else.
118 dialogBuilder.setNegativeButton(R.string.cancel, null);
120 // Set the open button listener.
121 dialogBuilder.setPositiveButton(R.string.open, (DialogInterface dialog, int which) -> {
122 // Return the dialog fragment to the parent activity.
123 openListener.onOpen(this);
126 // Create an alert dialog from the builder.
127 AlertDialog alertDialog = dialogBuilder.create();
129 // Remove the incorrect lint warning below that the window might be null.
130 assert alertDialog.getWindow() != null;
132 // Disable screenshots if not allowed.
133 if (!allowScreenshots) {
134 alertDialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
137 // The alert dialog must be shown before items in the layout can be modified.
140 // Get handles for the layout items.
141 EditText fileNameEditText = alertDialog.findViewById(R.id.file_name_edittext);
142 Button browseButton = alertDialog.findViewById(R.id.browse_button);
143 TextView fileDoesNotExistTextView = alertDialog.findViewById(R.id.file_does_not_exist_textview);
144 TextView storagePermissionTextView = alertDialog.findViewById(R.id.storage_permission_textview);
145 Button openButton = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE);
147 // Update the status of the open button when the file name changes.
148 fileNameEditText.addTextChangedListener(new TextWatcher() {
150 public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
155 public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
160 public void afterTextChanged(Editable editable) {
161 // Get the current file name.
162 String fileNameString = fileNameEditText.getText().toString();
164 // Convert the file name string to a file.
165 File file = new File(fileNameString);
167 // Check to see if the file exists.
168 if (file.exists()) { // The file exists.
169 // Hide the notification that the file does not exist.
170 fileDoesNotExistTextView.setVisibility(View.GONE);
172 // Enable the open button.
173 openButton.setEnabled(true);
174 } else { // The file does not exist.
175 // Show the notification that the file does not exist.
176 fileDoesNotExistTextView.setVisibility(View.VISIBLE);
178 // Disable the open button.
179 openButton.setEnabled(false);
184 // Instantiate the download location helper.
185 DownloadLocationHelper downloadLocationHelper = new DownloadLocationHelper();
187 // Get the default file path.
188 String defaultFilePath = downloadLocationHelper.getDownloadLocation(context) + "/";
190 // Display the default file path.
191 fileNameEditText.setText(defaultFilePath);
193 // Move the cursor to the end of the default file path.
194 fileNameEditText.setSelection(defaultFilePath.length());
196 // Hide the storage permission text view if the permission has already been granted.
197 if (ContextCompat.checkSelfPermission(context, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
198 storagePermissionTextView.setVisibility(View.GONE);
201 // Handle clicks on the browse button.
202 browseButton.setOnClickListener((View view) -> {
203 // Create the file picker intent.
204 Intent browseIntent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
206 // Set the intent MIME type to include all files so that everything is visible.
207 browseIntent.setType("*/*");
209 // Set the initial directory if the minimum API >= 26.
210 if (Build.VERSION.SDK_INT >= 26) {
211 browseIntent.putExtra(DocumentsContract.EXTRA_INITIAL_URI, Environment.getExternalStorageDirectory());
214 // Start the file picker. This must be started under `activity` to that the request code is returned correctly.
215 activity.startActivityForResult(browseIntent, MainWebViewActivity.BROWSE_OPEN_REQUEST_CODE);
218 // Return the alert dialog.