+ // Create a folder icon byte array output stream.
+ ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
+
+ // Convert the folder icon bitmap to a byte array. `0` is for lossless compression (the only option for a PNG).
+ folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
+
+ // Convert the folder icon byte array stream to a byte array.
+ byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
+
+ // Update the folder name and icon in the database.
+ bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, newFolderIconByteArray);
+ }
+
+ // Update the bookmarks cursor with the current contents of this folder.
+ bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
+
+ // Update the `ListView`.
+ bookmarksCursorAdapter.changeCursor(bookmarksCursor);
+ }
+
+ // Override `onBackPressed()` to handle the navigation drawer and and the WebViews.
+ @Override
+ public void onBackPressed() {
+ // Check the different options for processing `back`.
+ if (drawerLayout.isDrawerVisible(GravityCompat.START)) { // The navigation drawer is open.
+ // Close the navigation drawer.
+ drawerLayout.closeDrawer(GravityCompat.START);
+ } else if (drawerLayout.isDrawerVisible(GravityCompat.END)){ // The bookmarks drawer is open.
+ // close the bookmarks drawer.
+ drawerLayout.closeDrawer(GravityCompat.END);
+ } else if (displayingFullScreenVideo) { // A full screen video is shown.
+ // Exit the full screen video.
+ exitFullScreenVideo();
+ } else if (currentWebView.canGoBack()) { // There is at least one item in the current WebView history.
+ // Get the current web back forward list.
+ WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
+
+ // Get the previous entry URL.
+ String previousUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() - 1).getUrl();
+
+ // Apply the domain settings.
+ applyDomainSettings(currentWebView, previousUrl, false, false, false);
+
+ // Go back.
+ currentWebView.goBack();
+ } else if (tabLayout.getTabCount() > 1) { // There are at least two tabs.
+ // Close the current tab.
+ closeCurrentTab();
+ } else { // There isn't anything to do in Privacy Browser.
+ // Close Privacy Browser. `finishAndRemoveTask()` also removes Privacy Browser from the recent app list.
+ finishAndRemoveTask();
+
+ // Manually kill Privacy Browser. Otherwise, it is glitchy when restarted.
+ System.exit(0);
+ }
+ }
+
+ // Process the results of a file browse.
+ @Override
+ public void onActivityResult(int requestCode, int resultCode, Intent returnedIntent) {
+ // Run the default commands.
+ super.onActivityResult(requestCode, resultCode, returnedIntent);
+
+ // Run the commands that correlate to the specified request code.
+ switch (requestCode) {
+ case BROWSE_FILE_UPLOAD_REQUEST_CODE:
+ // Pass the file to the WebView.
+ fileChooserCallback.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, returnedIntent));
+ break;
+
+ case BROWSE_OPEN_REQUEST_CODE:
+ // Don't do anything if the user pressed back from the file picker.
+ if (resultCode == Activity.RESULT_OK) {
+ // Get a handle for the open dialog fragment.
+ DialogFragment openDialogFragment = (DialogFragment) getSupportFragmentManager().findFragmentByTag(getString(R.string.open));
+
+ // Only update the file name if the dialog still exists.
+ if (openDialogFragment != null) {
+ // Get a handle for the open dialog.
+ Dialog openDialog = openDialogFragment.getDialog();
+
+ // Remove the incorrect lint warning below that the dialog might be null.
+ assert openDialog != null;
+
+ // Get a handle for the file name edit text.
+ EditText fileNameEditText = openDialog.findViewById(R.id.file_name_edittext);
+
+ // Get the file name URI from the intent.
+ Uri fileNameUri = returnedIntent.getData();
+
+ // Get the file name string from the URI.
+ String fileNameString = fileNameUri.toString();
+
+ // Set the file name text.
+ fileNameEditText.setText(fileNameString);
+
+ // Move the cursor to the end of the file name edit text.
+ fileNameEditText.setSelection(fileNameString.length());
+ }
+ }
+ break;
+ }
+ }
+
+ private void loadUrlFromTextBox() {
+ // Get the text from urlTextBox and convert it to a string. trim() removes white spaces from the beginning and end of the string.
+ String unformattedUrlString = urlEditText.getText().toString().trim();
+
+ // Initialize the formatted URL string.
+ String url = "";
+
+ // Check to see if the unformatted URL string is a valid URL. Otherwise, convert it into a search.
+ if (unformattedUrlString.startsWith("content://")) { // This is a Content URL.
+ // Load the entire content URL.
+ url = unformattedUrlString;
+ } else if (Patterns.WEB_URL.matcher(unformattedUrlString).matches() || unformattedUrlString.startsWith("http://") || unformattedUrlString.startsWith("https://") ||
+ unformattedUrlString.startsWith("file://")) { // This is a standard URL.
+ // Add `https://` at the beginning if there is no protocol. Otherwise the app will segfault.
+ if (!unformattedUrlString.startsWith("http") && !unformattedUrlString.startsWith("file://")) {
+ unformattedUrlString = "https://" + unformattedUrlString;
+ }
+
+ // Initialize the unformatted URL.
+ URL unformattedUrl = null;
+
+ // Convert the unformatted URL string to a URL, then to a URI, and then back to a string, which sanitizes the input and adds in any missing components.
+ try {
+ unformattedUrl = new URL(unformattedUrlString);
+ } catch (MalformedURLException e) {
+ e.printStackTrace();
+ }
+
+ // The ternary operator (? :) makes sure that a null pointer exception is not thrown, which would happen if `.get` was called on a `null` value.
+ String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null;
+ String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null;
+ String path = unformattedUrl != null ? unformattedUrl.getPath() : null;
+ String query = unformattedUrl != null ? unformattedUrl.getQuery() : null;
+ String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null;
+
+ // Build the URI.
+ Uri.Builder uri = new Uri.Builder();
+ uri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
+
+ // Decode the URI as a UTF-8 string in.
+ try {
+ url = URLDecoder.decode(uri.build().toString(), "UTF-8");
+ } catch (UnsupportedEncodingException exception) {
+ // Do nothing. The formatted URL string will remain blank.
+ }
+ } else if (!unformattedUrlString.isEmpty()){ // This is not a URL, but rather a search string.
+ // Create an encoded URL String.
+ String encodedUrlString;
+
+ // Sanitize the search input.
+ try {
+ encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
+ } catch (UnsupportedEncodingException exception) {
+ encodedUrlString = "";
+ }
+
+ // Add the base search URL.
+ url = searchURL + encodedUrlString;
+ }
+
+ // Clear the focus from the URL edit text. Otherwise, proximate typing in the box will retain the colorized formatting instead of being reset during refocus.
+ urlEditText.clearFocus();
+
+ // Make it so.
+ loadUrl(currentWebView, url);
+ }
+
+ private void loadUrl(NestedScrollWebView nestedScrollWebView, String url) {
+ // Sanitize the URL.
+ url = sanitizeUrl(url);
+
+ // Apply the domain settings and load the URL.
+ applyDomainSettings(nestedScrollWebView, url, true, false, true);
+ }
+
+ public void findPreviousOnPage(View view) {
+ // Go to the previous highlighted phrase on the page. `false` goes backwards instead of forwards.
+ currentWebView.findNext(false);
+ }
+
+ public void findNextOnPage(View view) {
+ // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
+ currentWebView.findNext(true);
+ }
+
+ public void closeFindOnPage(View view) {
+ // Get a handle for the views.
+ Toolbar toolbar = findViewById(R.id.toolbar);
+ LinearLayout findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
+ EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
+
+ // Delete the contents of `find_on_page_edittext`.
+ findOnPageEditText.setText(null);
+
+ // Clear the highlighted phrases if the WebView is not null.
+ if (currentWebView != null) {
+ currentWebView.clearMatches();
+ }
+
+ // Hide the find on page linear layout.
+ findOnPageLinearLayout.setVisibility(View.GONE);
+
+ // Show the toolbar.
+ toolbar.setVisibility(View.VISIBLE);
+
+ // Get a handle for the input method manager.
+ InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+
+ // Remove the lint warning below that the input method manager might be null.
+ assert inputMethodManager != null;
+
+ // Hide the keyboard.
+ inputMethodManager.hideSoftInputFromWindow(toolbar.getWindowToken(), 0);
+ }
+
+ @Override
+ public void onApplyNewFontSize(DialogFragment dialogFragment) {
+ // Remove the incorrect lint warning below that the dialog fragment might be null.
+ assert dialogFragment != null;
+
+ // Get the dialog.
+ Dialog dialog = dialogFragment.getDialog();
+
+ // Remove the incorrect lint warning below tha the dialog might be null.
+ assert dialog != null;
+
+ // Get a handle for the font size edit text.
+ EditText fontSizeEditText = dialog.findViewById(R.id.font_size_edittext);
+
+ // Initialize the new font size variable with the current font size.
+ int newFontSize = currentWebView.getSettings().getTextZoom();
+
+ // Get the font size from the edit text.
+ try {
+ newFontSize = Integer.parseInt(fontSizeEditText.getText().toString());
+ } catch (Exception exception) {
+ // If the edit text does not contain a valid font size do nothing.
+ }
+
+ // Apply the new font size.
+ currentWebView.getSettings().setTextZoom(newFontSize);
+ }
+
+ @Override
+ public void onOpen(DialogFragment dialogFragment) {
+ // Get the dialog.
+ Dialog dialog = dialogFragment.getDialog();
+
+ // Remove the incorrect lint warning below that the dialog might be null.
+ assert dialog != null;
+
+ // Get handles for the views.
+ EditText fileNameEditText = dialog.findViewById(R.id.file_name_edittext);
+ CheckBox mhtCheckBox = dialog.findViewById(R.id.mht_checkbox);
+
+ // Get the file path string.
+ String openFilePath = fileNameEditText.getText().toString();
+
+ // Apply the domain settings. This resets the favorite icon and removes any domain settings.
+ applyDomainSettings(currentWebView, openFilePath, true, false, false);
+
+ // Open the file according to the type.
+ if (mhtCheckBox.isChecked()) { // Force opening of an MHT file.
+ try {
+ // Get the MHT file input stream.
+ InputStream mhtFileInputStream = getContentResolver().openInputStream(Uri.parse(openFilePath));
+
+ // Create a temporary MHT file.
+ File temporaryMhtFile = File.createTempFile("temporary_mht_file", ".mht", getCacheDir());
+
+ // Get a file output stream for the temporary MHT file.
+ FileOutputStream temporaryMhtFileOutputStream = new FileOutputStream(temporaryMhtFile);
+
+ // Create a transfer byte array.
+ byte[] transferByteArray = new byte[1024];
+
+ // Create an integer to track the number of bytes read.
+ int bytesRead;
+
+ // Copy the temporary MHT file input stream to the MHT output stream.
+ while ((bytesRead = mhtFileInputStream.read(transferByteArray)) > 0) {
+ temporaryMhtFileOutputStream.write(transferByteArray, 0, bytesRead);
+ }
+
+ // Flush the temporary MHT file output stream.
+ temporaryMhtFileOutputStream.flush();
+
+ // Close the streams.
+ temporaryMhtFileOutputStream.close();
+ mhtFileInputStream.close();
+
+ // Load the temporary MHT file.
+ currentWebView.loadUrl(temporaryMhtFile.toString());
+ } catch (Exception exception) {
+ // Display a snackbar.
+ Snackbar.make(currentWebView, getString(R.string.error) + " " + exception, Snackbar.LENGTH_INDEFINITE).show();
+ }
+ } else { // Let the WebView handle opening of the file.
+ // Open the file.
+ currentWebView.loadUrl(openFilePath);
+ }
+ }
+
+ private void downloadUrlWithExternalApp(String url) {
+ // Create a download intent. Not specifying the action type will display the maximum number of options.
+ Intent downloadIntent = new Intent();
+
+ // Set the URI and the mime type.
+ downloadIntent.setDataAndType(Uri.parse(url), "text/html");
+
+ // Flag the intent to open in a new task.
+ downloadIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+
+ // Show the chooser.
+ startActivity(Intent.createChooser(downloadIntent, getString(R.string.download_with_external_app)));
+ }
+
+ public void onSaveUrl(@NonNull String originalUrlString, @NonNull String fileNameString, @NonNull DialogFragment dialogFragment) {
+ // Store the URL. This will be used in the save URL activity result launcher.
+ if (originalUrlString.startsWith("data:")) {
+ // Save the original URL.
+ saveUrlString = originalUrlString;
+ } else {
+ // Get the dialog.
+ Dialog dialog = dialogFragment.getDialog();
+
+ // Remove the incorrect lint warning below that the dialog might be null.
+ assert dialog != null;
+
+ // Get a handle for the dialog URL edit text.
+ EditText dialogUrlEditText = dialog.findViewById(R.id.url_edittext);
+
+ // Get the URL from the edit text, which may have been modified.
+ saveUrlString = dialogUrlEditText.getText().toString();
+ }
+
+ // Open the file picker.
+ saveUrlActivityResultLauncher.launch(fileNameString);
+ }
+
+ // Remove the warning that `OnTouchListener()` needs to override `performClick()`, as the only purpose of setting the `OnTouchListener()` is to make it do nothing.
+ @SuppressLint("ClickableViewAccessibility")
+ private void initializeApp() {
+ // Get a handle for the input method.
+ InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
+
+ // Remove the lint warning below that the input method manager might be null.
+ assert inputMethodManager != null;