/**
* ownCloud Android client application
*
* @author Bartek Przybylski
* @author masensio
* @author David A. Velasco
* Copyright (C) 2011 Bartek Przybylski
* Copyright (C) 2015 ownCloud Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package com.owncloud.android.ui.activity;
import java.util.Arrays;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v7.app.ActionBar;
import android.support.v7.app.AppCompatActivity;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import com.owncloud.android.R;
import com.owncloud.android.lib.common.utils.Log_OC;
import com.owncloud.android.utils.DisplayUtils;
public class PassCodeActivity extends AppCompatActivity {
private static final String TAG = PassCodeActivity.class.getSimpleName();
public final static String ACTION_ENABLE = PassCodeActivity.class.getCanonicalName() + ".ENABLE";
public final static String ACTION_DISABLE = PassCodeActivity.class.getCanonicalName() + ".DISABLE";
public final static String ACTION_REQUEST = PassCodeActivity.class.getCanonicalName() + ".REQUEST";
private Button mBCancel;
private TextView mPassCodeHdr;
private TextView mPassCodeHdrExplanation;
private EditText[] mPassCodeEditTexts = new EditText[4];
private String [] mPassCodeDigits = {"","","",""};
private boolean mConfirmingPassCode = false;
private boolean mBChange = true; // to control that only one blocks jump
/**
* Initializes the activity.
*
* An intent with a valid ACTION is expected; if none is found, an {@link IllegalArgumentException} will be thrown.
*
* @param savedInstanceState Previously saved state - irrelevant in this case
*/
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.passcodelock);
mBCancel = (Button) findViewById(R.id.cancel);
mPassCodeHdr = (TextView) findViewById(R.id.header);
mPassCodeHdrExplanation = (TextView) findViewById(R.id.explanation);
mPassCodeEditTexts[0] = (EditText) findViewById(R.id.txt0);
mPassCodeEditTexts[0].requestFocus();
getWindow().setSoftInputMode(android.view.WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
mPassCodeEditTexts[1] = (EditText) findViewById(R.id.txt1);
mPassCodeEditTexts[2] = (EditText) findViewById(R.id.txt2);
mPassCodeEditTexts[3] = (EditText) findViewById(R.id.txt3);
if (ACTION_REQUEST.equals(getIntent().getAction())) {
/// this is a pass code request; the user has to input the right value
mPassCodeHdr.setText(R.string.pass_code_enter_pass_code);
mPassCodeHdrExplanation.setVisibility(View.INVISIBLE);
setCancelButtonEnabled(false); // no option to cancel
} else if (ACTION_ENABLE.equals(getIntent().getAction())) {
/// pass code preference has just been activated in Preferences; will receive and confirm pass code value
mPassCodeHdr.setText(R.string.pass_code_configure_your_pass_code);
//mPassCodeHdr.setText(R.string.pass_code_enter_pass_code); // TODO choose a header, check iOS
mPassCodeHdrExplanation.setVisibility(View.VISIBLE);
setCancelButtonEnabled(true);
} else if (ACTION_DISABLE.equals(getIntent().getAction())) {
/// pass code preference has just been disabled in Preferences;
// will confirm user knows pass code, then remove it
mPassCodeHdr.setText(R.string.pass_code_remove_your_pass_code);
mPassCodeHdrExplanation.setVisibility(View.INVISIBLE);
setCancelButtonEnabled(true);
} else {
throw new IllegalArgumentException("A valid ACTION is needed in the Intent passed to " + TAG);
}
setTextListeners();
ActionBar actionBar = getSupportActionBar();
actionBar.setIcon(DisplayUtils.getSeasonalIconId());
}
/**
* Enables or disables the cancel button to allow the user interrupt the ACTION requested to the activity.
*
* @param enabled 'True' makes the cancel button available, 'false' hides it.
*/
protected void setCancelButtonEnabled(boolean enabled){
if(enabled){
mBCancel.setVisibility(View.VISIBLE);
mBCancel.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
revertActionAndExit();
}
});
} else {
mBCancel.setVisibility(View.GONE);
mBCancel.setVisibility(View.INVISIBLE);
mBCancel.setOnClickListener(null);
}
}
/**
* Binds the appropiate listeners to the input boxes receiving each digit of the pass code.
*/
protected void setTextListeners() {
/// First input field
mPassCodeEditTexts[0].addTextChangedListener(new PassCodeDigitTextWatcher(0, false));
/*------------------------------------------------
* SECOND BOX
-------------------------------------------------*/
mPassCodeEditTexts[1].addTextChangedListener(new PassCodeDigitTextWatcher(1, false));
mPassCodeEditTexts[1].setOnKeyListener(new View.OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_DEL && mBChange) { // TODO WIP: event should be used to control what's exactly happening with DEL, not any custom field...
mPassCodeEditTexts[0].setText("");
mPassCodeEditTexts[0].requestFocus();
if (!mConfirmingPassCode)
mPassCodeDigits[0] = "";
mBChange = false;
} else if (!mBChange) {
mBChange = true;
}
return false;
}
});
mPassCodeEditTexts[1].setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
/// TODO WIP: should take advantage of hasFocus to reduce processing
if (mPassCodeEditTexts[0].getText().toString().equals("")) { // TODO WIP validation could be done in a global way, with a single OnFocusChangeListener for all the input fields
mPassCodeEditTexts[0].requestFocus();
}
}
});
/*------------------------------------------------
* THIRD BOX
-------------------------------------------------*/
mPassCodeEditTexts[2].addTextChangedListener(new PassCodeDigitTextWatcher(2, false));
mPassCodeEditTexts[2].setOnKeyListener(new View.OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_DEL && mBChange) {
mPassCodeEditTexts[1].requestFocus();
if (!mConfirmingPassCode)
mPassCodeDigits[1] = "";
mPassCodeEditTexts[1].setText("");
mBChange = false;
} else if (!mBChange) {
mBChange = true;
}
return false;
}
});
mPassCodeEditTexts[2].setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
if (mPassCodeEditTexts[0].getText().toString().equals("")) {
mPassCodeEditTexts[0].requestFocus();
} else if (mPassCodeEditTexts[1].getText().toString().equals("")) {
mPassCodeEditTexts[1].requestFocus();
}
}
});
/*------------------------------------------------
* FOURTH BOX
-------------------------------------------------*/
mPassCodeEditTexts[3].addTextChangedListener(new PassCodeDigitTextWatcher(3, true));
mPassCodeEditTexts[3].setOnKeyListener(new View.OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_DEL && mBChange) {
mPassCodeEditTexts[2].requestFocus();
if (!mConfirmingPassCode)
mPassCodeDigits[2] = "";
mPassCodeEditTexts[2].setText("");
mBChange = false;
} else if (!mBChange) {
mBChange = true;
}
return false;
}
});
mPassCodeEditTexts[3].setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
if (mPassCodeEditTexts[0].getText().toString().equals("")) {
mPassCodeEditTexts[0].requestFocus();
} else if (mPassCodeEditTexts[1].getText().toString().equals("")) {
mPassCodeEditTexts[1].requestFocus();
} else if (mPassCodeEditTexts[2].getText().toString().equals("")) {
mPassCodeEditTexts[2].requestFocus();
}
}
});
} // end setTextListener
/**
* Processes the pass code entered by the user just after the last digit was in.
*
* Takes into account the action requested to the activity, the currently saved pass code and the previously
* typed pass code, if any.
*/
private void processFullPassCode() {
if (ACTION_REQUEST.equals(getIntent().getAction())) {
if (checkPassCode()) {
/// pass code accepted in request, user is allowed to access the app
finish();
} else {
showErrorAndRestart(R.string.pass_code_wrong, R.string.pass_code_enter_pass_code, View.INVISIBLE);
}
} else if (ACTION_DISABLE.equals(getIntent().getAction())) {
if (checkPassCode()) {
/// pass code accepted when disabling, pass code is removed
SharedPreferences.Editor appPrefs = PreferenceManager
.getDefaultSharedPreferences(getApplicationContext()).edit();
appPrefs.putBoolean("set_pincode", false); // TODO remove; this should be unnecessary, was done before entering in the activity
appPrefs.commit();
Toast.makeText(PassCodeActivity.this, R.string.pass_code_removed, Toast.LENGTH_LONG).show();
finish();
} else {
showErrorAndRestart(R.string.pass_code_wrong, R.string.pass_code_enter_pass_code, View.INVISIBLE);
}
} else if (ACTION_ENABLE.equals(getIntent().getAction())) {
/// enabling pass code
if (!mConfirmingPassCode) {
requestPassCodeConfirmation();
} else if (confirmPassCode()) {
/// confirmed: user typed the same pass code twice
savePassCodeAndExit();
} else {
showErrorAndRestart(
R.string.pass_code_mismatch, R.string.pass_code_configure_your_pass_code, View.VISIBLE
);
}
}
}
private void showErrorAndRestart(int errorMessage, int headerMessage, int explanationVisibility) {
Arrays.fill(mPassCodeDigits, null);
CharSequence errorSeq = getString(errorMessage);
Toast.makeText(this, errorSeq, Toast.LENGTH_LONG).show();
mPassCodeHdr.setText(headerMessage); // TODO check if really needed
mPassCodeHdrExplanation.setVisibility(explanationVisibility); // TODO check if really needed
clearBoxes();
}
/**
* Ask to the user for retyping the pass code just entered before saving it as the current pass code.
*/
protected void requestPassCodeConfirmation(){
clearBoxes();
mPassCodeHdr.setText(R.string.pass_code_reenter_your_pass_code);
mPassCodeHdrExplanation.setVisibility(View.INVISIBLE);
mConfirmingPassCode = true;
}
/**
* Compares pass code entered by the user with the value currently saved in the app.
*
* @return 'True' if entered pass code equals to the saved one.
*/
protected boolean checkPassCode(){
SharedPreferences appPrefs = PreferenceManager
.getDefaultSharedPreferences(getApplicationContext());
String savedPassCodeDigits[] = new String[4];
savedPassCodeDigits[0] = appPrefs.getString("PrefPinCode1", null);
savedPassCodeDigits[1] = appPrefs.getString("PrefPinCode2", null);
savedPassCodeDigits[2] = appPrefs.getString("PrefPinCode3", null);
savedPassCodeDigits[3] = appPrefs.getString("PrefPinCode4", null);
boolean result = true;
for (int i = 0; i < mPassCodeDigits.length && result; i++) {
result = result && (mPassCodeDigits[i] != null) && mPassCodeDigits[i].equals(savedPassCodeDigits[i]);
}
return result;
}
/**
* Compares pass code retyped by the user in the input fields with the value entered just before.
*
* @return 'True' if retyped pass code equals to the entered before.
*/
protected boolean confirmPassCode(){
mConfirmingPassCode = false;
boolean result = true;
for (int i = 0; i < mPassCodeEditTexts.length && result; i++) {
result = result && ((mPassCodeEditTexts[i].getText().toString()).equals(mPassCodeDigits[i]));
}
return result;
}
/**
* Sets the input fields to empty strings and puts the focus on the first one.
*/
protected void clearBoxes(){
for (int i=0; i < mPassCodeEditTexts.length; i++) {
mPassCodeEditTexts[i].setText("");
}
mPassCodeEditTexts[0].requestFocus();
}
/**
* Overrides click on the BACK arrow to correctly cancel ACTION_ENABLE or ACTION_DISABLE, while preventing
* than ACTION_REQUEST may be worked around.
*
* @param keyCode Key code of the key that triggered the down event.
* @param event Event triggered.
* @return 'True' when the key event was processed by this method.
*/
@Override
public boolean onKeyDown(int keyCode, KeyEvent event){
if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount()== 0){
if (ACTION_ENABLE.equals(getIntent().getAction()) || ACTION_DISABLE.equals(getIntent().getAction())) {
revertActionAndExit();
}
return true;
}
return super.onKeyDown(keyCode, event);
}
/**
* Saves the pass code input by the user as the current pass code.
*/
protected void savePassCodeAndExit() {
SharedPreferences.Editor appPrefs = PreferenceManager
.getDefaultSharedPreferences(getApplicationContext()).edit();
appPrefs.putString("PrefPinCode1", mPassCodeDigits[0]);
appPrefs.putString("PrefPinCode2", mPassCodeDigits[1]);
appPrefs.putString("PrefPinCode3", mPassCodeDigits[2]);
appPrefs.putString("PrefPinCode4", mPassCodeDigits[3]);
appPrefs.putBoolean("set_pincode", true); /// TODO remove; unnecessary, Preferences did it before entering here
appPrefs.commit();
Toast.makeText(this, R.string.pass_code_stored, Toast.LENGTH_LONG).show();
finish();
}
/**
* Cancellation of ACTION_ENABLE or ACTION_DISABLE; reverts the enable or disable action done by
* {@link Preferences}, then finishes.
*/
protected void revertActionAndExit() {
SharedPreferences.Editor appPrefsE = PreferenceManager
.getDefaultSharedPreferences(getApplicationContext()).edit();
SharedPreferences appPrefs = PreferenceManager
.getDefaultSharedPreferences(getApplicationContext());
boolean state = appPrefs.getBoolean("set_pincode", false);
appPrefsE.putBoolean("set_pincode", !state);
// TODO WIP: this is reverting the value of the preference because it was changed BEFORE entering
// TODO in this activity; was the PreferenceCheckBox in the caller who did it
appPrefsE.commit();
finish();
}
private class PassCodeDigitTextWatcher implements TextWatcher {
private int mIndex = -1;
private boolean mLastOne = false;
/**
* Constructor
*
* @param index Position in the pass code of the input field that will be bound to this watcher.
* @param lastOne 'True' means that watcher corresponds to the last position of the pass code.
*/
public PassCodeDigitTextWatcher(int index, boolean lastOne) {
mIndex = index;
mLastOne = lastOne;
if (mIndex < 0) {
throw new IllegalArgumentException(
"Invalid index in " + PassCodeDigitTextWatcher.class.getSimpleName() + " constructor"
);
}
}
private int next() {
return mLastOne ? 0 : mIndex + 1;
}
/**
* Performs several actions when the user types a digit in an input field:
* - saves the input digit to the state of the activity; this will allow retyping the pass code to confirm it.
* - moves the focus automatically to the next field
* - for the last field, triggers the processing of the full pass code
*
* @param s
*/
@Override
public void afterTextChanged(Editable s) {
if (s.length() > 0) {
if (!mConfirmingPassCode) {
mPassCodeDigits[mIndex] = mPassCodeEditTexts[mIndex].getText().toString();
}
mPassCodeEditTexts[next()].requestFocus();
if (mLastOne) {
processFullPassCode();
}
} else {
Log_OC.d(TAG, "Text box " + mIndex + " was cleaned");
}
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
// nothing to do
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// nothing to do
}
}
}