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package com.wireguard.android;
import android.content.Context;
import android.os.Bundle;
import android.text.InputFilter;
import android.text.LoginFilter;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;
import com.wireguard.android.databinding.ConfigEditFragmentBinding;
import com.wireguard.config.Config;
import com.wireguard.crypto.KeyEncoding;
/**
* Fragment for editing a WireGuard configuration.
*/
public class ConfigEditFragment extends BaseConfigFragment {
private final Config localConfig = new Config();
@Override
protected void onCurrentConfigChanged(final Config config) {
localConfig.copyFrom(config);
}
@Override
public void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
@Override
public void onCreateOptionsMenu(final Menu menu, final MenuInflater inflater) {
inflater.inflate(R.menu.config_edit, menu);
}
@Override
public View onCreateView(final LayoutInflater inflater, final ViewGroup parent,
final Bundle savedInstanceState) {
final ConfigEditFragmentBinding binding =
ConfigEditFragmentBinding.inflate(inflater, parent, false);
final EditText configNameText = binding.getRoot().findViewById(R.id.config_name_text);
configNameText.setFilters(new InputFilter[]{
new InputFilter.LengthFilter(16),
new LoginFilter.UsernameFilterGeneric() {
@Override
public boolean isAllowed(final char c) {
return Character.isLetterOrDigit(c) || "_=+.-".indexOf(c) != -1;
}
}
});
final EditText privateKeyText = binding.getRoot().findViewById(R.id.private_key_text);
privateKeyText.setFilters(new InputFilter[]{
new InputFilter() {
@Override
public CharSequence filter(final CharSequence source,
final int sStart, final int sEnd,
final Spanned dest,
final int dStart, final int dEnd) {
SpannableStringBuilder replacement = null;
int rIndex = 0;
final int dLength = dest.length();
for (int sIndex = sStart; sIndex < sEnd; ++sIndex) {
final char c = source.charAt(sIndex);
final int dIndex = dStart + (sIndex - sStart);
// Restrict characters to the base64 character set.
// Ensure adding this character does not push the length over the limit.
if (((dIndex + 1 < KeyEncoding.KEY_LENGTH_BASE64 && isAllowed(c)) ||
(dIndex + 1 == KeyEncoding.KEY_LENGTH_BASE64 && c == '=')) &&
dLength + (sIndex - sStart) < KeyEncoding.KEY_LENGTH_BASE64) {
++rIndex;
} else {
if (replacement == null)
replacement = new SpannableStringBuilder(source, sStart, sEnd);
replacement.delete(rIndex, rIndex + 1);
}
}
return replacement;
}
private boolean isAllowed(final char c) {
return Character.isLetterOrDigit(c) || c == '+' || c == '/';
}
}
});
binding.setConfig(localConfig);
return binding.getRoot();
}
@Override
public boolean onOptionsItemSelected(final MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_action_save:
saveConfig();
return true;
default:
return false;
}
}
private void saveConfig() {
// FIXME: validate input
VpnService.getInstance().update(getCurrentConfig().getName(), localConfig);
// Hide the keyboard; it rarely goes away on its own.
final BaseConfigActivity activity = (BaseConfigActivity) getActivity();
final View focusedView = activity.getCurrentFocus();
if (focusedView != null) {
final InputMethodManager inputManager =
(InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
inputManager.hideSoftInputFromWindow(focusedView.getWindowToken(),
InputMethodManager.HIDE_NOT_ALWAYS);
}
// Tell the activity to go back to the detail view.
activity.setCurrentConfig(localConfig);
}
}
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