+++ /dev/null
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.android.settings.development;
-
-import static android.net.ConnectivityManager.PRIVATE_DNS_DEFAULT_MODE;
-import static android.net.ConnectivityManager.PRIVATE_DNS_MODE_OFF;
-import static android.net.ConnectivityManager.PRIVATE_DNS_MODE_OPPORTUNISTIC;
-import static android.net.ConnectivityManager.PRIVATE_DNS_MODE_PROVIDER_HOSTNAME;
-
-import android.app.AlertDialog;
-import android.app.Dialog;
-import android.content.ContentResolver;
-import android.content.Context;
-import android.content.DialogInterface;
-import android.content.res.Resources;
-import android.os.Bundle;
-import android.provider.Settings;
-import android.support.v14.preference.PreferenceDialogFragment;
-import android.support.v7.preference.DialogPreference;
-import android.text.Editable;
-import android.text.TextUtils;
-import android.text.TextWatcher;
-import android.util.AttributeSet;
-import android.util.Log;
-import android.view.inputmethod.EditorInfo;
-import android.view.KeyEvent;
-import android.view.View;
-import android.view.ViewGroup.LayoutParams;
-import android.view.ViewGroup.MarginLayoutParams;
-import android.widget.CompoundButton;
-import android.widget.CompoundButton.OnCheckedChangeListener;
-import android.widget.EditText;
-import android.widget.RadioButton;
-import android.widget.TextView;
-import android.widget.TextView.OnEditorActionListener;
-
-import com.android.settings.R;
-import com.android.settingslib.CustomDialogPreference;
-
-
-public class PrivateDnsModeDialogPreference extends CustomDialogPreference
- implements OnCheckedChangeListener, TextWatcher, OnEditorActionListener {
- private static final String TAG = PrivateDnsModeDialogPreference.class.getSimpleName();
-
- private static final String MODE_KEY = Settings.Global.PRIVATE_DNS_MODE;
- private static final String HOSTNAME_KEY = Settings.Global.PRIVATE_DNS_SPECIFIER;
- private String mMode;
- private EditText mEditText;
-
- public static String getSummaryStringForModeFromSettings(ContentResolver cr, Resources res) {
- final String mode = getModeFromSettings(cr);
- switch (mode) {
- case PRIVATE_DNS_MODE_OFF:
- return res.getString(R.string.private_dns_mode_off);
- case PRIVATE_DNS_MODE_OPPORTUNISTIC:
- return res.getString(R.string.private_dns_mode_opportunistic);
- case PRIVATE_DNS_MODE_PROVIDER_HOSTNAME:
- return getHostnameFromSettings(cr);
- default:
- return "unknown";
- }
- }
-
- public PrivateDnsModeDialogPreference(Context context, AttributeSet attrs, int defStyleAttr,
- int defStyleRes) {
- super(context, attrs, defStyleAttr, defStyleRes);
- }
-
- public PrivateDnsModeDialogPreference(Context context, AttributeSet attrs, int defStyleAttr) {
- super(context, attrs, defStyleAttr);
- }
-
- public PrivateDnsModeDialogPreference(Context context, AttributeSet attrs) {
- super(context, attrs);
- }
-
- public PrivateDnsModeDialogPreference(Context context) {
- super(context);
- }
-
- // This is called first when the dialog is launched.
- @Override
- protected void onBindDialogView(View view) {
- final String mode = getModeFromSettings();
-
- RadioButton rb = (RadioButton) view.findViewById(R.id.private_dns_mode_off);
- if (mode.equals(PRIVATE_DNS_MODE_OFF)) rb.setChecked(true);
- rb.setOnCheckedChangeListener(this);
-
- rb = (RadioButton) view.findViewById(R.id.private_dns_mode_opportunistic);
- if (mode.equals(PRIVATE_DNS_MODE_OPPORTUNISTIC)) rb.setChecked(true);
- rb.setOnCheckedChangeListener(this);
-
- rb = (RadioButton) view.findViewById(R.id.private_dns_mode_provider);
- if (mode.equals(PRIVATE_DNS_MODE_PROVIDER_HOSTNAME)) rb.setChecked(true);
- rb.setOnCheckedChangeListener(this);
-
- mEditText = (EditText) view.findViewById(R.id.private_dns_mode_provider_hostname);
- mEditText.setOnEditorActionListener(this);
- mEditText.addTextChangedListener(this);
-
- // (Mostly) Fix the EditText field's indentation to align underneath the
- // displayed radio button text, and not under the radio button itself.
- final int padding = rb.isLayoutRtl()
- ? rb.getCompoundPaddingRight()
- : rb.getCompoundPaddingLeft();
- final MarginLayoutParams marginParams = (MarginLayoutParams) mEditText.getLayoutParams();
- marginParams.setMarginStart(marginParams.getMarginStart() + padding);
- mEditText.setLayoutParams(marginParams);
- mEditText.setText(getHostnameFromSettings());
-
- setDialogValue(mode);
- }
-
- @Override
- protected void onDialogClosed(boolean positiveResult) {
- if (!positiveResult) return;
-
- saveDialogValue();
- setSummary(getSummaryStringForModeFromSettings(
- getContext().getContentResolver(), getContext().getResources()));
- }
-
- @Override
- public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
- if (!isChecked) return;
-
- switch (buttonView.getId()) {
- case R.id.private_dns_mode_off:
- setDialogValue(PRIVATE_DNS_MODE_OFF);
- break;
- case R.id.private_dns_mode_opportunistic:
- setDialogValue(PRIVATE_DNS_MODE_OPPORTUNISTIC);
- break;
- case R.id.private_dns_mode_provider:
- setDialogValue(PRIVATE_DNS_MODE_PROVIDER_HOSTNAME);
- break;
- default:
- // Unknown button; ignored.
- break;
- }
- }
-
- @Override
- public boolean onEditorAction(TextView tv, int actionId, KeyEvent k) {
- if (actionId == EditorInfo.IME_ACTION_DONE) {
- saveDialogValue();
- getDialog().dismiss();
- return true;
- }
- return false;
- }
-
- @Override
- public void beforeTextChanged(CharSequence s, int start, int count, int after) { return; }
-
- @Override
- public void onTextChanged(CharSequence s, int start, int before, int count) { return; }
-
- @Override
- public void afterTextChanged(Editable s) {
- final String hostname = s.toString();
- final boolean appearsValid = isWeaklyValidatedHostname(hostname);
- // TODO: Disable the "positive button" ("Save") when appearsValid is false.
- }
-
- private void setDialogValue(String mode) {
- mMode = mode;
- final boolean txtEnabled = mMode.equals(PRIVATE_DNS_MODE_PROVIDER_HOSTNAME);
- mEditText.setEnabled(txtEnabled);
- }
-
- private void saveDialogValue() {
- if (!isValidMode(mMode)) {
- mMode = PRIVATE_DNS_DEFAULT_MODE;
- }
-
- if (mMode.equals(PRIVATE_DNS_MODE_PROVIDER_HOSTNAME)) {
- final String hostname = mEditText.getText().toString();
- if (isWeaklyValidatedHostname(hostname)) {
- saveHostnameToSettings(hostname);
- } else {
- // TODO: Once quasi-validation of hostnames works and acceptable
- // user signaling is working, this can be deleted.
- mMode = PRIVATE_DNS_MODE_OPPORTUNISTIC;
- if (TextUtils.isEmpty(hostname)) saveHostnameToSettings("");
- }
- }
-
- saveModeToSettings(mMode);
- }
-
- private String getModeFromSettings() {
- return getModeFromSettings(getContext().getContentResolver());
- }
-
- private void saveModeToSettings(String value) {
- Settings.Global.putString(getContext().getContentResolver(), MODE_KEY, value);
- }
-
- private String getHostnameFromSettings() {
- return getHostnameFromSettings(getContext().getContentResolver());
- }
-
- private void saveHostnameToSettings(String hostname) {
- Settings.Global.putString(getContext().getContentResolver(), HOSTNAME_KEY, hostname);
- }
-
- private static String getModeFromSettings(ContentResolver cr) {
- final String mode = Settings.Global.getString(cr, MODE_KEY);
- return isValidMode(mode) ? mode : PRIVATE_DNS_DEFAULT_MODE;
- }
-
- private static boolean isValidMode(String mode) {
- return !TextUtils.isEmpty(mode) && (
- mode.equals(PRIVATE_DNS_MODE_OFF) ||
- mode.equals(PRIVATE_DNS_MODE_OPPORTUNISTIC) ||
- mode.equals(PRIVATE_DNS_MODE_PROVIDER_HOSTNAME));
- }
-
- private static String getHostnameFromSettings(ContentResolver cr) {
- return Settings.Global.getString(cr, HOSTNAME_KEY);
- }
-
- private static boolean isWeaklyValidatedHostname(String hostname) {
- // TODO: Find and use a better validation method. Specifically:
- // [1] this should reject IP string literals, and
- // [2] do the best, simplest, future-proof verification that
- // the input approximates a DNS hostname.
- final String WEAK_HOSTNAME_REGEX = "^[a-zA-Z0-9_.-]+$";
- return hostname.matches(WEAK_HOSTNAME_REGEX);
- }
-}
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