2 * Copyright © 2019 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;
52 public class SaveWebpageImageDialog extends DialogFragment {
53 // Define the save webpage image listener.
54 private SaveWebpageImageListener saveWebpageImageListener;
56 // The public interface is used to send information back to the parent activity.
57 public interface SaveWebpageImageListener {
58 void onSaveWebpageImage(DialogFragment dialogFragment);
62 public void onAttach(@NonNull Context context) {
63 // Run the default commands.
64 super.onAttach(context);
66 // Get a handle for the save webpage image listener from the launching context.
67 saveWebpageImageListener = (SaveWebpageImageListener) context;
70 // `@SuppressLing("InflateParams")` removes the warning about using null as the parent view group when inflating the alert dialog.
71 @SuppressLint("InflateParams")
74 public Dialog onCreateDialog(Bundle savedInstanceState) {
75 // Get a handle for the activity and the context.
76 Activity activity = getActivity();
77 Context context = getContext();
79 // Remove the incorrect lint warnings below that the activity and context might be null.
80 assert activity != null;
81 assert context != null;
83 // Get a handle for the shared preferences.
84 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
86 // Get the screenshot and theme preferences.
87 boolean darkTheme = sharedPreferences.getBoolean("dark_theme", false);
88 boolean allowScreenshots = sharedPreferences.getBoolean("allow_screenshots", false);
90 // Use an alert dialog builder to create the alert dialog.
91 AlertDialog.Builder dialogBuilder;
93 // Set the style and icon according to the theme.
95 dialogBuilder = new AlertDialog.Builder(activity, R.style.PrivacyBrowserAlertDialogDark);
96 dialogBuilder.setIcon(R.drawable.images_enabled_dark);
98 dialogBuilder = new AlertDialog.Builder(activity, R.style.PrivacyBrowserAlertDialogLight);
99 dialogBuilder.setIcon(R.drawable.images_enabled_light);
103 dialogBuilder.setTitle(R.string.save_image);
105 // Set the view. The parent view is null because it will be assigned by the alert dialog.
106 dialogBuilder.setView(activity.getLayoutInflater().inflate(R.layout.save_dialog, null));
108 // Set the cancel button listener. Using `null` as the listener closes the dialog without doing anything else.
109 dialogBuilder.setNegativeButton(R.string.cancel, null);
111 // Set the save button listener.
112 dialogBuilder.setPositiveButton(R.string.save, (DialogInterface dialog, int which) -> {
113 // Return the dialog fragment to the parent activity.
114 saveWebpageImageListener.onSaveWebpageImage(this);
117 // Create an alert dialog from the builder.
118 AlertDialog alertDialog = dialogBuilder.create();
120 // Remove the incorrect lint warning below that `getWindow()` might be null.
121 assert alertDialog.getWindow() != null;
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 storagePermissionTextView = alertDialog.findViewById(R.id.storage_permission_textview);
135 Button saveButton = alertDialog.getButton(AlertDialog.BUTTON_POSITIVE);
137 // Create a string for the default file path.
138 String defaultFilePath;
140 // Set the default file path according to the storage permission state.
141 if (ContextCompat.checkSelfPermission(context, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) { // The storage permission has been granted.
142 // Set the default file path to use the external public directory.
143 defaultFilePath = Environment.getExternalStorageDirectory() + "/" + getString(R.string.webpage_png);
144 } else { // The storage permission has not been granted.
145 // Set the default file path to use the external private directory.
146 defaultFilePath = context.getExternalFilesDir(null) + "/" + getString(R.string.webpage_png);
149 // Display the default file path.
150 fileNameEditText.setText(defaultFilePath);
152 // Update the status of the save button when the file name changes.
153 fileNameEditText.addTextChangedListener(new TextWatcher() {
155 public void beforeTextChanged(CharSequence s, int start, int count, int after) {
160 public void onTextChanged(CharSequence s, int start, int before, int count) {
165 public void afterTextChanged(Editable s) {
166 // // Enable the save button if a file name exists.
167 saveButton.setEnabled(!fileNameEditText.getText().toString().isEmpty());
171 // Handle clicks on the browse button.
172 browseButton.setOnClickListener((View view) -> {
173 // Create the file picker intent.
174 Intent browseIntent = new Intent(Intent.ACTION_CREATE_DOCUMENT);
176 // Set the intent MIME type to include all files so that everything is visible.
177 browseIntent.setType("*/*");
179 // Set the initial file name.
180 browseIntent.putExtra(Intent.EXTRA_TITLE, getString(R.string.webpage_png));
182 // Set the initial directory if the minimum API >= 26.
183 if (Build.VERSION.SDK_INT >= 26) {
184 browseIntent.putExtra(DocumentsContract.EXTRA_INITIAL_URI, Environment.getExternalStorageDirectory());
187 // Request a file that can be opened.
188 browseIntent.addCategory(Intent.CATEGORY_OPENABLE);
190 // Start the file picker. This must be started under `activity` so that the request code is returned correctly.
191 activity.startActivityForResult(browseIntent, MainWebViewActivity.BROWSE_SAVE_WEBPAGE_IMAGE_REQUEST_CODE);
194 // Hide the storage permission text view on API < 23 as permissions on older devices are automatically granted.
195 if (Build.VERSION.SDK_INT < 23) {
196 storagePermissionTextView.setVisibility(View.GONE);
199 // Return the alert dialog.