/*
* Copyright (C) 2010 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;
import com.android.internal.widget.LockPatternUtils;
import com.android.internal.widget.PasswordEntryKeyboardHelper;
import com.android.internal.widget.PasswordEntryKeyboardView;
import android.app.Activity;
import android.app.Fragment;
import android.app.admin.DevicePolicyManager;
import android.content.Intent;
import android.inputmethodservice.KeyboardView;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.preference.PreferenceActivity;
import android.text.Editable;
import android.text.InputType;
import android.text.Selection;
import android.text.Spannable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.view.inputmethod.EditorInfo;
import android.widget.Button;
import android.widget.TextView;
import android.widget.TextView.OnEditorActionListener;
public class ChooseLockPassword extends PreferenceActivity {
public static final String PASSWORD_MIN_KEY = "lockscreen.password_min";
public static final String PASSWORD_MAX_KEY = "lockscreen.password_max";
public static final String PASSWORD_MIN_LETTERS_KEY = "lockscreen.password_min_letters";
public static final String PASSWORD_MIN_LOWERCASE_KEY = "lockscreen.password_min_lowercase";
public static final String PASSWORD_MIN_UPPERCASE_KEY = "lockscreen.password_min_uppercase";
public static final String PASSWORD_MIN_NUMERIC_KEY = "lockscreen.password_min_numeric";
public static final String PASSWORD_MIN_SYMBOLS_KEY = "lockscreen.password_min_symbols";
public static final String PASSWORD_MIN_NONLETTER_KEY = "lockscreen.password_min_nonletter";
@Override
public Intent getIntent() {
Intent modIntent = new Intent(super.getIntent());
modIntent.putExtra(EXTRA_SHOW_FRAGMENT, ChooseLockPasswordFragment.class.getName());
modIntent.putExtra(EXTRA_NO_HEADERS, true);
return modIntent;
}
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO: Fix on phones
// Disable IME on our window since we provide our own keyboard
//getWindow().setFlags(WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM,
//WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);
super.onCreate(savedInstanceState);
CharSequence msg = getText(R.string.lockpassword_choose_your_password_header);
showBreadCrumbs(msg, msg);
}
public static class ChooseLockPasswordFragment extends Fragment
implements OnClickListener, OnEditorActionListener, TextWatcher {
private static final String KEY_FIRST_PIN = "first_pin";
private static final String KEY_UI_STAGE = "ui_stage";
private TextView mPasswordEntry;
private int mPasswordMinLength = 4;
private int mPasswordMaxLength = 16;
private int mPasswordMinLetters = 0;
private int mPasswordMinUpperCase = 0;
private int mPasswordMinLowerCase = 0;
private int mPasswordMinSymbols = 0;
private int mPasswordMinNumeric = 0;
private int mPasswordMinNonLetter = 0;
private LockPatternUtils mLockPatternUtils;
private int mRequestedQuality = DevicePolicyManager.PASSWORD_QUALITY_NUMERIC;
private ChooseLockSettingsHelper mChooseLockSettingsHelper;
private Stage mUiStage = Stage.Introduction;
private TextView mHeaderText;
private String mFirstPin;
private KeyboardView mKeyboardView;
private PasswordEntryKeyboardHelper mKeyboardHelper;
private boolean mIsAlphaMode;
private Button mCancelButton;
private Button mNextButton;
private static final int CONFIRM_EXISTING_REQUEST = 58;
static final int RESULT_FINISHED = RESULT_FIRST_USER;
private static final long ERROR_MESSAGE_TIMEOUT = 3000;
private static final int MSG_SHOW_ERROR = 1;
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
if (msg.what == MSG_SHOW_ERROR) {
updateStage((Stage) msg.obj);
}
}
};
/**
* Keep track internally of where the user is in choosing a pattern.
*/
protected enum Stage {
Introduction(R.string.lockpassword_choose_your_password_header,
R.string.lockpassword_choose_your_pin_header,
R.string.lockpassword_continue_label),
NeedToConfirm(R.string.lockpassword_confirm_your_password_header,
R.string.lockpassword_confirm_your_pin_header,
R.string.lockpassword_ok_label),
ConfirmWrong(R.string.lockpassword_confirm_passwords_dont_match,
R.string.lockpassword_confirm_pins_dont_match,
R.string.lockpassword_continue_label);
/**
* @param headerMessage The message displayed at the top.
*/
Stage(int hintInAlpha, int hintInNumeric, int nextButtonText) {
this.alphaHint = hintInAlpha;
this.numericHint = hintInNumeric;
this.buttonText = nextButtonText;
}
public final int alphaHint;
public final int numericHint;
public final int buttonText;
}
// required constructor for fragments
public ChooseLockPasswordFragment() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mLockPatternUtils = new LockPatternUtils(getActivity());
Intent intent = getActivity().getIntent();
mRequestedQuality = Math.max(intent.getIntExtra(LockPatternUtils.PASSWORD_TYPE_KEY,
mRequestedQuality), mLockPatternUtils.getRequestedPasswordQuality());
mPasswordMinLength = Math.max(
intent.getIntExtra(PASSWORD_MIN_KEY, mPasswordMinLength), mLockPatternUtils
.getRequestedMinimumPasswordLength());
mPasswordMaxLength = intent.getIntExtra(PASSWORD_MAX_KEY, mPasswordMaxLength);
mPasswordMinLetters = Math.max(intent.getIntExtra(PASSWORD_MIN_LETTERS_KEY,
mPasswordMinLetters), mLockPatternUtils.getRequestedPasswordMinimumLetters());
mPasswordMinUpperCase = Math.max(intent.getIntExtra(PASSWORD_MIN_UPPERCASE_KEY,
mPasswordMinUpperCase), mLockPatternUtils.getRequestedPasswordMinimumUpperCase());
mPasswordMinLowerCase = Math.max(intent.getIntExtra(PASSWORD_MIN_LOWERCASE_KEY,
mPasswordMinLowerCase), mLockPatternUtils.getRequestedPasswordMinimumLowerCase());
mPasswordMinNumeric = Math.max(intent.getIntExtra(PASSWORD_MIN_NUMERIC_KEY,
mPasswordMinNumeric), mLockPatternUtils.getRequestedPasswordMinimumNumeric());
mPasswordMinSymbols = Math.max(intent.getIntExtra(PASSWORD_MIN_SYMBOLS_KEY,
mPasswordMinSymbols), mLockPatternUtils.getRequestedPasswordMinimumSymbols());
mPasswordMinNonLetter = Math.max(intent.getIntExtra(PASSWORD_MIN_NONLETTER_KEY,
mPasswordMinNonLetter), mLockPatternUtils.getRequestedPasswordMinimumNonLetter());
mChooseLockSettingsHelper = new ChooseLockSettingsHelper(getActivity());
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.choose_lock_password, null);
mCancelButton = (Button) view.findViewById(R.id.cancel_button);
mCancelButton.setOnClickListener(this);
mNextButton = (Button) view.findViewById(R.id.next_button);
mNextButton.setOnClickListener(this);
mIsAlphaMode = DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC == mRequestedQuality
|| DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC == mRequestedQuality
|| DevicePolicyManager.PASSWORD_QUALITY_COMPLEX == mRequestedQuality;
mKeyboardView = (PasswordEntryKeyboardView) view.findViewById(R.id.keyboard);
mPasswordEntry = (TextView) view.findViewById(R.id.password_entry);
mPasswordEntry.setOnEditorActionListener(this);
mPasswordEntry.addTextChangedListener(this);
final Activity activity = getActivity();
mKeyboardHelper = new PasswordEntryKeyboardHelper(activity,
mKeyboardView, mPasswordEntry);
mKeyboardHelper.setKeyboardMode(mIsAlphaMode ?
PasswordEntryKeyboardHelper.KEYBOARD_MODE_ALPHA
: PasswordEntryKeyboardHelper.KEYBOARD_MODE_NUMERIC);
mHeaderText = (TextView) view.findViewById(R.id.headerText);
mKeyboardView.requestFocus();
int currentType = mPasswordEntry.getInputType();
mPasswordEntry.setInputType(mIsAlphaMode ? currentType
: (InputType.TYPE_CLASS_NUMBER | InputType.TYPE_NUMBER_VARIATION_PASSWORD));
Intent intent = getActivity().getIntent();
final boolean confirmCredentials = intent.getBooleanExtra("confirm_credentials", true);
if (savedInstanceState == null) {
updateStage(Stage.Introduction);
if (confirmCredentials) {
mChooseLockSettingsHelper.launchConfirmationActivity(CONFIRM_EXISTING_REQUEST,
null, null);
}
} else {
mFirstPin = savedInstanceState.getString(KEY_FIRST_PIN);
final String state = savedInstanceState.getString(KEY_UI_STAGE);
if (state != null) {
mUiStage = Stage.valueOf(state);
updateStage(mUiStage);
}
}
// Update the breadcrumb (title) if this is embedded in a PreferenceActivity
if (activity instanceof PreferenceActivity) {
final PreferenceActivity preferenceActivity = (PreferenceActivity) activity;
int id = mIsAlphaMode ? R.string.lockpassword_choose_your_password_header
: R.string.lockpassword_choose_your_pin_header;
CharSequence title = getText(id);
preferenceActivity.showBreadCrumbs(title, title);
}
return view;
}
@Override
public void onResume() {
super.onResume();
updateStage(mUiStage);
mKeyboardView.requestFocus();
}
@Override
public void onPause() {
mHandler.removeMessages(MSG_SHOW_ERROR);
super.onPause();
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putString(KEY_UI_STAGE, mUiStage.name());
outState.putString(KEY_FIRST_PIN, mFirstPin);
}
@Override
public void onActivityResult(int requestCode, int resultCode,
Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case CONFIRM_EXISTING_REQUEST:
if (resultCode != Activity.RESULT_OK) {
getActivity().setResult(RESULT_FINISHED);
getActivity().finish();
}
break;
}
}
protected void updateStage(Stage stage) {
mUiStage = stage;
updateUi();
}
/**
* Validates PIN and returns a message to display if PIN fails test.
* @param password the raw password the user typed in
* @return error message to show to user or null if password is OK
*/
private String validatePassword(String password) {
if (password.length() < mPasswordMinLength) {
return getString(mIsAlphaMode ?
R.string.lockpassword_password_too_short
: R.string.lockpassword_pin_too_short, mPasswordMinLength);
}
if (password.length() > mPasswordMaxLength) {
return getString(mIsAlphaMode ?
R.string.lockpassword_password_too_long
: R.string.lockpassword_pin_too_long, mPasswordMaxLength + 1);
}
int letters = 0;
int numbers = 0;
int lowercase = 0;
int symbols = 0;
int uppercase = 0;
int nonletter = 0;
for (int i = 0; i < password.length(); i++) {
char c = password.charAt(i);
// allow non white space Latin-1 characters only
if (c <= 32 || c > 127) {
return getString(R.string.lockpassword_illegal_character);
}
if (c >= '0' && c <= '9') {
numbers++;
nonletter++;
} else if (c >= 'A' && c <= 'Z') {
letters++;
uppercase++;
} else if (c >= 'a' && c <= 'z') {
letters++;
lowercase++;
} else {
symbols++;
nonletter++;
}
}
if (DevicePolicyManager.PASSWORD_QUALITY_NUMERIC == mRequestedQuality
&& (letters > 0 || symbols > 0)) {
// This shouldn't be possible unless user finds some way to bring up
// soft keyboard
return getString(R.string.lockpassword_pin_contains_non_digits);
} else if (DevicePolicyManager.PASSWORD_QUALITY_COMPLEX == mRequestedQuality) {
if (letters < mPasswordMinLetters) {
return String.format(getResources().getQuantityString(
R.plurals.lockpassword_password_requires_letters, mPasswordMinLetters),
mPasswordMinLetters);
} else if (numbers < mPasswordMinNumeric) {
return String.format(getResources().getQuantityString(
R.plurals.lockpassword_password_requires_numeric, mPasswordMinNumeric),
mPasswordMinNumeric);
} else if (lowercase < mPasswordMinLowerCase) {
return String.format(getResources().getQuantityString(
R.plurals.lockpassword_password_requires_lowercase, mPasswordMinLowerCase),
mPasswordMinLowerCase);
} else if (uppercase < mPasswordMinUpperCase) {
return String.format(getResources().getQuantityString(
R.plurals.lockpassword_password_requires_uppercase, mPasswordMinUpperCase),
mPasswordMinUpperCase);
} else if (symbols < mPasswordMinSymbols) {
return String.format(getResources().getQuantityString(
R.plurals.lockpassword_password_requires_symbols, mPasswordMinSymbols),
mPasswordMinSymbols);
} else if (nonletter < mPasswordMinNonLetter) {
return String.format(getResources().getQuantityString(
R.plurals.lockpassword_password_requires_nonletter, mPasswordMinNonLetter),
mPasswordMinNonLetter);
}
} else {
final boolean alphabetic = DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC
== mRequestedQuality;
final boolean alphanumeric = DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC
== mRequestedQuality;
if ((alphabetic || alphanumeric) && letters == 0) {
return getString(R.string.lockpassword_password_requires_alpha);
}
if (alphanumeric && numbers == 0) {
return getString(R.string.lockpassword_password_requires_digit);
}
}
if(mLockPatternUtils.checkPasswordHistory(password)) {
return getString(mIsAlphaMode ? R.string.lockpassword_password_recently_used
: R.string.lockpassword_pin_recently_used);
}
return null;
}
private void handleNext() {
final String pin = mPasswordEntry.getText().toString();
if (TextUtils.isEmpty(pin)) {
return;
}
String errorMsg = null;
if (mUiStage == Stage.Introduction) {
errorMsg = validatePassword(pin);
if (errorMsg == null) {
mFirstPin = pin;
updateStage(Stage.NeedToConfirm);
mPasswordEntry.setText("");
}
} else if (mUiStage == Stage.NeedToConfirm) {
if (mFirstPin.equals(pin)) {
final boolean isFallback = getActivity().getIntent().getBooleanExtra(
LockPatternUtils.LOCKSCREEN_BIOMETRIC_WEAK_FALLBACK, false);
mLockPatternUtils.clearLock(isFallback);
mLockPatternUtils.saveLockPassword(pin, mRequestedQuality, isFallback);
getActivity().finish();
} else {
updateStage(Stage.ConfirmWrong);
CharSequence tmp = mPasswordEntry.getText();
if (tmp != null) {
Selection.setSelection((Spannable) tmp, 0, tmp.length());
}
}
}
if (errorMsg != null) {
showError(errorMsg, mUiStage);
}
}
public void onClick(View v) {
switch (v.getId()) {
case R.id.next_button:
handleNext();
break;
case R.id.cancel_button:
getActivity().finish();
break;
}
}
private void showError(String msg, final Stage next) {
mHeaderText.setText(msg);
Message mesg = mHandler.obtainMessage(MSG_SHOW_ERROR, next);
mHandler.removeMessages(MSG_SHOW_ERROR);
mHandler.sendMessageDelayed(mesg, ERROR_MESSAGE_TIMEOUT);
}
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
// Check if this was the result of hitting the enter or "done" key
if (actionId == EditorInfo.IME_NULL
|| actionId == EditorInfo.IME_ACTION_DONE
|| actionId == EditorInfo.IME_ACTION_NEXT) {
handleNext();
return true;
}
return false;
}
/**
* Update the hint based on current Stage and length of password entry
*/
private void updateUi() {
String password = mPasswordEntry.getText().toString();
final int length = password.length();
if (mUiStage == Stage.Introduction && length > 0) {
if (length < mPasswordMinLength) {
String msg = getString(mIsAlphaMode ? R.string.lockpassword_password_too_short
: R.string.lockpassword_pin_too_short, mPasswordMinLength);
mHeaderText.setText(msg);
mNextButton.setEnabled(false);
} else {
String error = validatePassword(password);
if (error != null) {
mHeaderText.setText(error);
mNextButton.setEnabled(false);
} else {
mHeaderText.setText(R.string.lockpassword_press_continue);
mNextButton.setEnabled(true);
}
}
} else {
mHeaderText.setText(mIsAlphaMode ? mUiStage.alphaHint : mUiStage.numericHint);
mNextButton.setEnabled(length > 0);
}
mNextButton.setText(mUiStage.buttonText);
}
public void afterTextChanged(Editable s) {
// Changing the text while error displayed resets to NeedToConfirm state
if (mUiStage == Stage.ConfirmWrong) {
mUiStage = Stage.NeedToConfirm;
}
updateUi();
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
}
}