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/*
* Copyright (C) 2009 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.vpn;
import com.android.settings.R;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.vpn.L2tpIpsecProfile;
import android.net.vpn.L2tpIpsecPskProfile;
import android.net.vpn.L2tpProfile;
import android.net.vpn.PptpProfile;
import android.net.vpn.VpnProfile;
import android.net.vpn.VpnType;
import android.os.Bundle;
import android.os.Parcel;
import android.os.Parcelable;
import android.preference.PreferenceActivity;
import android.preference.PreferenceGroup;
import android.text.TextUtils;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
/**
* The activity class for editing a new or existing VPN profile.
*/
public class VpnEditor extends PreferenceActivity {
private static final int MENU_SAVE = Menu.FIRST;
private static final int MENU_CANCEL = Menu.FIRST + 1;
private static final String KEY_PROFILE = "profile";
private static final String KEY_ORIGINAL_PROFILE_NAME = "orig_profile_name";
private VpnProfileEditor mProfileEditor;
private boolean mAddingProfile;
private byte[] mOriginalProfileData;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
VpnProfile p = (VpnProfile) ((savedInstanceState == null)
? getIntent().getParcelableExtra(VpnSettings.KEY_VPN_PROFILE)
: savedInstanceState.getParcelable(KEY_PROFILE));
mProfileEditor = getEditor(p);
mAddingProfile = TextUtils.isEmpty(p.getName());
// Loads the XML preferences file
addPreferencesFromResource(R.xml.vpn_edit);
initViewFor(p);
Parcel parcel = Parcel.obtain();
p.writeToParcel(parcel, 0);
mOriginalProfileData = parcel.marshall();
}
@Override
protected synchronized void onSaveInstanceState(Bundle outState) {
if (mProfileEditor == null) return;
outState.putParcelable(KEY_PROFILE, getProfile());
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
menu.add(0, MENU_SAVE, 0, R.string.vpn_menu_done)
.setIcon(android.R.drawable.ic_menu_save);
menu.add(0, MENU_CANCEL, 0,
mAddingProfile ? R.string.vpn_menu_cancel
: R.string.vpn_menu_revert)
.setIcon(android.R.drawable.ic_menu_close_clear_cancel);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case MENU_SAVE:
if (validateAndSetResult()) finish();
return true;
case MENU_CANCEL:
if (profileChanged()) {
showCancellationConfirmDialog();
} else {
finish();
}
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
switch (keyCode) {
case KeyEvent.KEYCODE_BACK:
if (validateAndSetResult()) finish();
return true;
}
return super.onKeyDown(keyCode, event);
}
private void initViewFor(VpnProfile profile) {
setTitle(profile);
mProfileEditor.loadPreferencesTo(getPreferenceScreen());
}
private void setTitle(VpnProfile profile) {
String formatString = mAddingProfile
? getString(R.string.vpn_edit_title_add)
: getString(R.string.vpn_edit_title_edit);
setTitle(String.format(formatString,
profile.getType().getDisplayName()));
}
/**
* Checks the validity of the inputs and set the profile as result if valid.
* @return true if the result is successfully set
*/
private boolean validateAndSetResult() {
String errorMsg = mProfileEditor.validate();
if (errorMsg != null) {
Util.showErrorMessage(this, errorMsg);
return false;
}
if (profileChanged()) setResult(getProfile());
return true;
}
private void setResult(VpnProfile p) {
Intent intent = new Intent(this, VpnSettings.class);
intent.putExtra(VpnSettings.KEY_VPN_PROFILE, (Parcelable) p);
setResult(RESULT_OK, intent);
}
private VpnProfileEditor getEditor(VpnProfile p) {
switch (p.getType()) {
case L2TP_IPSEC:
return new L2tpIpsecEditor((L2tpIpsecProfile) p);
case L2TP_IPSEC_PSK:
return new L2tpIpsecPskEditor((L2tpIpsecPskProfile) p);
case L2TP:
return new L2tpEditor((L2tpProfile) p);
case PPTP:
return new PptpEditor((PptpProfile) p);
default:
return new VpnProfileEditor(p);
}
}
private void showCancellationConfirmDialog() {
new AlertDialog.Builder(this)
.setTitle(android.R.string.dialog_alert_title)
.setIcon(android.R.drawable.ic_dialog_alert)
.setMessage(mAddingProfile
? R.string.vpn_confirm_add_profile_cancellation
: R.string.vpn_confirm_edit_profile_cancellation)
.setPositiveButton(R.string.vpn_yes_button,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int w) {
finish();
}
})
.setNegativeButton(R.string.vpn_mistake_button, null)
.show();
}
private VpnProfile getProfile() {
return mProfileEditor.getProfile();
}
private boolean profileChanged() {
Parcel newParcel = Parcel.obtain();
getProfile().writeToParcel(newParcel, 0);
byte[] newData = newParcel.marshall();
if (mOriginalProfileData.length == newData.length) {
for (int i = 0, n = mOriginalProfileData.length; i < n; i++) {
if (mOriginalProfileData[i] != newData[i]) return true;
}
return false;
}
return true;
}
}
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