src/com/owncloud/android/authentication/AuthenticatorActivity.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012  Bartek Przybylski
   3  *   Copyright (C) 2012-2013 ownCloud Inc.
   4  *
   5  *   This program is free software: you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License version 2,
   7  *   as published by the Free Software Foundation.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18
  19 package com.owncloud.android.authentication;
  20
  21 import com.owncloud.android.AccountUtils;
  22 import com.owncloud.android.Log_OC;
  23 import com.owncloud.android.ui.dialog.SslValidatorDialog;
  24 import com.owncloud.android.ui.dialog.SslValidatorDialog.OnSslValidatorListener;
  25 import com.owncloud.android.utils.OwnCloudVersion;
  26 import com.owncloud.android.network.OwnCloudClientUtils;
  27 import com.owncloud.android.operations.OwnCloudServerCheckOperation;
  28 import com.owncloud.android.operations.ExistenceCheckOperation;
  29 import com.owncloud.android.operations.OAuth2GetAccessToken;
  30 import com.owncloud.android.operations.OnRemoteOperationListener;
  31 import com.owncloud.android.operations.RemoteOperation;
  32 import com.owncloud.android.operations.RemoteOperationResult;
  33 import com.owncloud.android.operations.RemoteOperationResult.ResultCode;
  34
  35 import android.accounts.Account;
  36 import android.accounts.AccountAuthenticatorActivity;
  37 import android.accounts.AccountManager;
  38 import android.app.AlertDialog;
  39 import android.app.Dialog;
  40 import android.app.ProgressDialog;
  41 import android.content.ContentResolver;
  42 import android.content.DialogInterface;
  43 import android.content.Intent;
  44 import android.content.SharedPreferences;
  45 import android.graphics.Rect;
  46 import android.graphics.drawable.Drawable;
  47 import android.net.Uri;
  48 import android.os.Bundle;
  49 import android.os.Handler;
  50 import android.preference.PreferenceManager;
  51 import android.text.InputType;
  52 import android.view.KeyEvent;
  53 import android.view.MotionEvent;
  54 import android.view.View;
  55 import android.view.View.OnFocusChangeListener;
  56 import android.view.View.OnTouchListener;
  57 import android.view.Window;
  58 import android.view.inputmethod.EditorInfo;
  59 import android.widget.CheckBox;
  60 import android.widget.EditText;
  61 import android.widget.Button;
  62 import android.widget.ImageView;
  63 import android.widget.TextView;
  64 import android.widget.Toast;
  65 import android.widget.TextView.OnEditorActionListener;
  66
  67 import com.owncloud.android.R;
  68
  69 import eu.alefzero.webdav.WebdavClient;
  70
  71 /**
  72  * This Activity is used to add an ownCloud account to the App
  73  *
  74  * @author Bartek Przybylski
  75  * @author David A. Velasco
  76  */
  77 public class AuthenticatorActivity extends AccountAuthenticatorActivity
  78         implements  OnRemoteOperationListener, OnSslValidatorListener, OnFocusChangeListener, OnEditorActionListener {
  79
  80     private static final String TAG = AuthenticatorActivity.class.getSimpleName();
  81
  82     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  83     public static final String EXTRA_USER_NAME = "USER_NAME";
  84     public static final String EXTRA_HOST_NAME = "HOST_NAME";
  85     public static final String EXTRA_ACTION = "ACTION";
  86
  87     private static final String KEY_HOST_URL_TEXT = "HOST_URL_TEXT";
  88     private static final String KEY_OC_VERSION = "OC_VERSION";
  89     private static final String KEY_ACCOUNT = "ACCOUNT";
  90     private static final String KEY_SERVER_CHECKED_AND_VALID = "SERVER_CHECKED_AND_VALID";
  91     private static final String KEY_SERVER_CHECK_IN_PROGRESS = "SERVER_CHECK_IN_PROGRESS";
  92     private static final String KEY_SERVER_STATUS_TEXT = "SERVER_STATUS_TEXT";
  93     private static final String KEY_SERVER_STATUS_ICON = "SERVER_STATUS_ICON";
  94     private static final String KEY_IS_SSL_CONN = "IS_SSL_CONN";
  95     private static final String KEY_AUTH_STATUS_TEXT = "AUTH_STATUS_TEXT";
  96     private static final String KEY_AUTH_STATUS_ICON = "AUTH_STATUS_ICON";
  97
  98     private static final String OAUTH_MODE_ON = "on";
  99     private static final String OAUTH_MODE_OFF = "off";
 100     private static final String OAUTH_MODE_OPTIONAL = "optional";
 101
 102     private static final int DIALOG_LOGIN_PROGRESS = 0;
 103     private static final int DIALOG_SSL_VALIDATOR = 1;
 104     private static final int DIALOG_CERT_NOT_SAVED = 2;
 105     private static final int DIALOG_OAUTH2_LOGIN_PROGRESS = 3;
 106
 107     public static final byte ACTION_CREATE = 0;
 108     public static final byte ACTION_UPDATE_TOKEN = 1;
 109
 110
 111     private String mHostBaseUrl;
 112     private OwnCloudVersion mDiscoveredVersion;
 113
 114     private int mServerStatusText, mServerStatusIcon;
 115     private boolean mServerCheckedAndValid, mIsSslConn;
 116     private int mAuthStatusText, mAuthStatusIcon;
 117
 118     private final Handler mHandler = new Handler();
 119     private Thread mOperationThread;
 120     private OwnCloudServerCheckOperation mOcServerChkOperation;
 121     private ExistenceCheckOperation mAuthCheckOperation;
 122     private RemoteOperationResult mLastSslUntrustedServerResult;
 123
 124     private Uri mNewCapturedUriFromOAuth2Redirection;
 125
 126     private AccountManager mAccountMgr;
 127     private boolean mJustCreated;
 128     private byte mAction;
 129     private Account mAccount;
 130
 131     private ImageView mViewPasswordButton;
 132     private EditText mHostUrlInput;
 133     private EditText mUsernameInput;
 134     private EditText mPasswordInput;
 135     private CheckBox mOAuth2Check;
 136     private String mOAuthAccessToken;
 137     private View mOkButton;
 138     private TextView mAuthStatusLayout;
 139
 140     private TextView mOAuthAuthEndpointText;
 141     private TextView mOAuthTokenEndpointText;
 142
 143
 144     /**
 145      * {@inheritDoc}
 146      *
 147      * IMPORTANT ENTRY POINT 1: activity is shown to the user
 148      */
 149     @Override
 150     protected void onCreate(Bundle savedInstanceState) {
 151         super.onCreate(savedInstanceState);
 152         getWindow().requestFeature(Window.FEATURE_NO_TITLE);
 153
 154         /// set view and get references to view elements
 155         setContentView(R.layout.account_setup);
 156         mViewPasswordButton = (ImageView) findViewById(R.id.viewPasswordButton);
 157         mHostUrlInput = (EditText) findViewById(R.id.hostUrlInput);
 158         mUsernameInput = (EditText) findViewById(R.id.account_username);
 159         mPasswordInput = (EditText) findViewById(R.id.account_password);
 160         mOAuthAuthEndpointText = (TextView)findViewById(R.id.oAuthEntryPoint_1);
 161         mOAuthTokenEndpointText = (TextView)findViewById(R.id.oAuthEntryPoint_2);
 162         mOAuth2Check = (CheckBox) findViewById(R.id.oauth_onOff_check);
 163         mOkButton = findViewById(R.id.buttonOK);
 164         mAuthStatusLayout = (TextView) findViewById(R.id.auth_status_text);
 165
 166         /// complete label for 'register account' button
 167         Button b = (Button) findViewById(R.id.account_register);
 168         if (b != null) {
 169             b.setText(String.format(getString(R.string.auth_register), getString(R.string.app_name)));
 170         }
 171
 172         /// initialization
 173         mAccountMgr = AccountManager.get(this);
 174         mNewCapturedUriFromOAuth2Redirection = null;
 175         mAction = getIntent().getByteExtra(EXTRA_ACTION, ACTION_CREATE);
 176         mAccount = null;
 177         mHostBaseUrl = "";
 178
 179         if (savedInstanceState == null) {
 180             /// connection state and info
 181             mServerStatusText = mServerStatusIcon = 0;
 182             mServerCheckedAndValid = false;
 183             mIsSslConn = false;
 184             mAuthStatusText = mAuthStatusIcon = 0;
 185
 186             /// retrieve extras from intent
 187             String tokenType = getIntent().getExtras().getString(AccountAuthenticator.KEY_AUTH_TOKEN_TYPE);
 188             boolean oAuthRequired = AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN.equals(tokenType) || OAUTH_MODE_ON.equals(getString(R.string.oauth2_mode));
 189
 190             mAccount = getIntent().getExtras().getParcelable(EXTRA_ACCOUNT);
 191             if (mAccount != null) {
 192                 String ocVersion = mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_OC_VERSION);
 193                 if (ocVersion != null) {
 194                     mDiscoveredVersion = new OwnCloudVersion(ocVersion);
 195                 }
 196                 mHostBaseUrl = normalizeUrl(mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_OC_BASE_URL));
 197                 mHostUrlInput.setText(mHostBaseUrl);
 198                 String userName = mAccount.name.substring(0, mAccount.name.lastIndexOf('@'));
 199                 mUsernameInput.setText(userName);
 200                 oAuthRequired = (mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_SUPPORTS_OAUTH2) != null);
 201             }
 202             mOAuth2Check.setChecked(oAuthRequired);
 203             changeViewByOAuth2Check(oAuthRequired);
 204
 205
 206         } else {
 207             /// connection state and info
 208             mServerCheckedAndValid = savedInstanceState.getBoolean(KEY_SERVER_CHECKED_AND_VALID);
 209             mServerStatusText = savedInstanceState.getInt(KEY_SERVER_STATUS_TEXT);
 210             mServerStatusIcon = savedInstanceState.getInt(KEY_SERVER_STATUS_ICON);
 211             mIsSslConn = savedInstanceState.getBoolean(KEY_IS_SSL_CONN);
 212             mAuthStatusText = savedInstanceState.getInt(KEY_AUTH_STATUS_TEXT);
 213             mAuthStatusIcon = savedInstanceState.getInt(KEY_AUTH_STATUS_ICON);
 214
 215             /// server data
 216             String ocVersion = savedInstanceState.getString(KEY_OC_VERSION);
 217             if (ocVersion != null) {
 218                 mDiscoveredVersion = new OwnCloudVersion(ocVersion);
 219             }
 220             mHostBaseUrl = savedInstanceState.getString(KEY_HOST_URL_TEXT);
 221
 222             // account data, if updating
 223             mAccount = savedInstanceState.getParcelable(KEY_ACCOUNT);
 224
 225             // check if server check was interrupted by a configuration change
 226             if (savedInstanceState.getBoolean(KEY_SERVER_CHECK_IN_PROGRESS, false)) {
 227                 checkOcServer();
 228             }
 229
 230         }
 231
 232         showServerStatus();
 233         showAuthStatus();
 234
 235         if (!OAUTH_MODE_OPTIONAL.equals(getString(R.string.oauth2_mode))) {
 236             mOAuth2Check.setVisibility(View.GONE);
 237         }
 238
 239         if (mAction == ACTION_UPDATE_TOKEN) {
 240             /// lock things that should not change
 241             mHostUrlInput.setEnabled(false);
 242             mUsernameInput.setEnabled(false);
 243             mOAuth2Check.setVisibility(View.GONE);
 244             if (!mServerCheckedAndValid && mOcServerChkOperation == null) {
 245                 checkOcServer();
 246             }
 247         }
 248
 249         mPasswordInput.setText("");     // clean password to avoid social hacking (disadvantage: password in removed if the device is turned aside)
 250         mJustCreated = true;
 251
 252         /// bind view elements to listeners
 253         mHostUrlInput.setOnFocusChangeListener(this);
 254         mHostUrlInput.setOnTouchListener(new RightDrawableOnTouchListener() {
 255             @Override
 256             public boolean onDrawableTouch(final MotionEvent event) {
 257                 AuthenticatorActivity.this.onRefreshClick(mHostUrlInput);
 258                 return true;
 259             }
 260         });
 261         mPasswordInput.setOnFocusChangeListener(this);
 262         mPasswordInput.setImeOptions(EditorInfo.IME_ACTION_DONE);
 263         mPasswordInput.setOnEditorActionListener(this);
 264     }
 265
 266     /**
 267      * Saves relevant state before {@link #onPause()}
 268      *
 269      * Do NOT save {@link #mNewCapturedUriFromOAuth2Redirection}; it keeps a temporal flag, intended to defer the
 270      * processing of the redirection caught in {@link #onNewIntent(Intent)} until {@link #onResume()}
 271      *
 272      * See {@link #loadSavedInstanceState(Bundle)}
 273      */
 274     @Override
 275     protected void onSaveInstanceState(Bundle outState) {
 276         super.onSaveInstanceState(outState);
 277
 278         /// connection state and info
 279         outState.putInt(KEY_SERVER_STATUS_TEXT, mServerStatusText);
 280         outState.putInt(KEY_SERVER_STATUS_ICON, mServerStatusIcon);
 281         outState.putBoolean(KEY_SERVER_CHECKED_AND_VALID, mServerCheckedAndValid);
 282         outState.putBoolean(KEY_SERVER_CHECK_IN_PROGRESS, (!mServerCheckedAndValid && mOcServerChkOperation != null));
 283         outState.putBoolean(KEY_IS_SSL_CONN, mIsSslConn);
 284         outState.putInt(KEY_AUTH_STATUS_ICON, mAuthStatusIcon);
 285         outState.putInt(KEY_AUTH_STATUS_TEXT, mAuthStatusText);
 286
 287         /// server data
 288         if (mDiscoveredVersion != null) {
 289             outState.putString(KEY_OC_VERSION, mDiscoveredVersion.toString());
 290         }
 291         outState.putString(KEY_HOST_URL_TEXT, mHostBaseUrl);
 292
 293         /// account data, if updating
 294         if (mAccount != null) {
 295             outState.putParcelable(KEY_ACCOUNT, mAccount);
 296         }
 297
 298     }
 299
 300
 301     /**
 302      * The redirection triggered by the OAuth authentication server as response to the GET AUTHORIZATION request
 303      * is caught here.
 304      *
 305      * To make this possible, this activity needs to be qualified with android:launchMode = "singleTask" in the
 306      * AndroidManifest.xml file.
 307      */
 308     @Override
 309     protected void onNewIntent (Intent intent) {
 310         Log_OC.d(TAG, "onNewIntent()");
 311         Uri data = intent.getData();
 312         if (data != null && data.toString().startsWith(getString(R.string.oauth2_redirect_uri))) {
 313             mNewCapturedUriFromOAuth2Redirection = data;
 314         }
 315     }
 316
 317
 318     /**
 319      * The redirection triggered by the OAuth authentication server as response to the GET AUTHORIZATION, and
 320      * deferred in {@link #onNewIntent(Intent)}, is processed here.
 321      */
 322     @Override
 323     protected void onResume() {
 324         super.onResume();
 325         // the state of mOAuth2Check is automatically recovered between configuration changes, but not before onCreate() finishes; so keep the next lines here
 326         changeViewByOAuth2Check(mOAuth2Check.isChecked());
 327         if (mAction == ACTION_UPDATE_TOKEN && mJustCreated) {
 328             if (mOAuth2Check.isChecked())
 329                 Toast.makeText(this, R.string.auth_expired_oauth_token_toast, Toast.LENGTH_LONG).show();
 330             else
 331                 Toast.makeText(this, R.string.auth_expired_basic_auth_toast, Toast.LENGTH_LONG).show();
 332         }
 333
 334         if (mNewCapturedUriFromOAuth2Redirection != null) {
 335             getOAuth2AccessTokenFromCapturedRedirection();
 336         }
 337
 338         mJustCreated = false;
 339     }
 340
 341
 342     /**
 343      * Parses the redirection with the response to the GET AUTHORIZATION request to the
 344      * oAuth server and requests for the access token (GET ACCESS TOKEN)
 345      */
 346     private void getOAuth2AccessTokenFromCapturedRedirection() {
 347         /// Parse data from OAuth redirection
 348         String queryParameters = mNewCapturedUriFromOAuth2Redirection.getQuery();
 349         mNewCapturedUriFromOAuth2Redirection = null;
 350
 351         /// Showing the dialog with instructions for the user.
 352         showDialog(DIALOG_OAUTH2_LOGIN_PROGRESS);
 353
 354         /// GET ACCESS TOKEN to the oAuth server
 355         RemoteOperation operation = new OAuth2GetAccessToken(   getString(R.string.oauth2_client_id),
 356                                                                 getString(R.string.oauth2_redirect_uri),
 357                                                                 getString(R.string.oauth2_grant_type),
 358                                                                 queryParameters);
 359         //WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(getString(R.string.oauth2_url_endpoint_access)), getApplicationContext());
 360         WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mOAuthTokenEndpointText.getText().toString().trim()), getApplicationContext());
 361         operation.execute(client, this, mHandler);
 362     }
 363
 364
 365
 366     /**
 367      * Handles the change of focus on the text inputs for the server URL and the password
 368      */
 369     public void onFocusChange(View view, boolean hasFocus) {
 370         if (view.getId() == R.id.hostUrlInput && !hasFocus) {
 371             onUrlInputFocusLost((TextView) view);
 372
 373         } else if (view.getId() == R.id.account_password) {
 374             onPasswordFocusChanged((TextView) view, hasFocus);
 375         }
 376     }
 377
 378
 379     /**
 380      * Handles changes in focus on the text input for the server URL.
 381      *
 382      * IMPORTANT ENTRY POINT 2: When (!hasFocus), user wrote the server URL and changed to
 383      * other field. The operation to check the existence of the server in the entered URL is
 384      * started.
 385      *
 386      * When hasFocus:    user 'comes back' to write again the server URL.
 387      *
 388      * @param hostInput     TextView with the URL input field receiving the change of focus.
 389      */
 390     private void onUrlInputFocusLost(TextView hostInput) {
 391         if (!mHostBaseUrl.equals(normalizeUrl(mHostUrlInput.getText().toString()))) {
 392             checkOcServer();
 393         }
 394     }
 395
 396
 397     private void checkOcServer() {
 398         String uri = mHostUrlInput.getText().toString().trim();
 399         mServerCheckedAndValid = false;
 400         mOkButton.setEnabled(false);
 401         mDiscoveredVersion = null;
 402         hideRefreshButton();
 403         if (uri.length() != 0) {
 404             mServerStatusText = R.string.auth_testing_connection;
 405             mServerStatusIcon = R.drawable.progress_small;
 406             showServerStatus();
 407             mOcServerChkOperation = new  OwnCloudServerCheckOperation(uri, this);
 408             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(uri), this);
 409             mOperationThread = mOcServerChkOperation.execute(client, this, mHandler);
 410         } else {
 411             mServerStatusText = 0;
 412             mServerStatusIcon = 0;
 413             showServerStatus();
 414         }
 415     }
 416
 417
 418     /**
 419      * Handles changes in focus on the text input for the password (basic authorization).
 420      *
 421      * When (hasFocus), the button to toggle password visibility is shown.
 422      *
 423      * When (!hasFocus), the button is made invisible and the password is hidden.
 424      *
 425      * @param passwordInput    TextView with the password input field receiving the change of focus.
 426      * @param hasFocus          'True' if focus is received, 'false' if is lost
 427      */
 428     private void onPasswordFocusChanged(TextView passwordInput, boolean hasFocus) {
 429         if (hasFocus) {
 430             mViewPasswordButton.setVisibility(View.VISIBLE);
 431         } else {
 432             int input_type = InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD;
 433             passwordInput.setInputType(input_type);
 434             mViewPasswordButton.setVisibility(View.INVISIBLE);
 435         }
 436     }
 437
 438
 439
 440     /**
 441      * Cancels the authenticator activity
 442      *
 443      * IMPORTANT ENTRY POINT 3: Never underestimate the importance of cancellation
 444      *
 445      * This method is bound in the layout/acceoun_setup.xml resource file.
 446      *
 447      * @param view      Cancel button
 448      */
 449     public void onCancelClick(View view) {
 450         setResult(RESULT_CANCELED);     // TODO review how is this related to AccountAuthenticator (debugging)
 451         finish();
 452     }
 453
 454
 455
 456     /**
 457      * Checks the credentials of the user in the root of the ownCloud server
 458      * before creating a new local account.
 459      *
 460      * For basic authorization, a check of existence of the root folder is
 461      * performed.
 462      *
 463      * For OAuth, starts the flow to get an access token; the credentials test
 464      * is postponed until it is available.
 465      *
 466      * IMPORTANT ENTRY POINT 4
 467      *
 468      * @param view      OK button
 469      */
 470     public void onOkClick(View view) {
 471         // this check should be unnecessary
 472         if (mDiscoveredVersion == null || !mDiscoveredVersion.isVersionValid()  || mHostBaseUrl == null || mHostBaseUrl.length() == 0) {
 473             mServerStatusIcon = R.drawable.common_error;
 474             mServerStatusText = R.string.auth_wtf_reenter_URL;
 475             showServerStatus();
 476             mOkButton.setEnabled(false);
 477             Log_OC.wtf(TAG,  "The user was allowed to click 'connect' to an unchecked server!!");
 478             return;
 479         }
 480
 481         if (mOAuth2Check.isChecked()) {
 482             startOauthorization();
 483
 484         } else {
 485             checkBasicAuthorization();
 486         }
 487     }
 488
 489
 490     /**
 491      * Tests the credentials entered by the user performing a check of existence on
 492      * the root folder of the ownCloud server.
 493      */
 494     private void checkBasicAuthorization() {
 495         /// get the path to the root folder through WebDAV from the version server
 496         String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, false);
 497
 498         /// get basic credentials entered by user
 499         String username = mUsernameInput.getText().toString();
 500         String password = mPasswordInput.getText().toString();
 501
 502         /// be gentle with the user
 503         showDialog(DIALOG_LOGIN_PROGRESS);
 504
 505         /// test credentials accessing the root folder
 506         mAuthCheckOperation = new  ExistenceCheckOperation("", this, false);
 507         WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this);
 508         client.setBasicCredentials(username, password);
 509         mOperationThread = mAuthCheckOperation.execute(client, this, mHandler);
 510     }
 511
 512
 513     /**
 514      * Starts the OAuth 'grant type' flow to get an access token, with
 515      * a GET AUTHORIZATION request to the BUILT-IN authorization server.
 516      */
 517     private void startOauthorization() {
 518         // be gentle with the user
 519         mAuthStatusIcon = R.drawable.progress_small;
 520         mAuthStatusText = R.string.oauth_login_connection;
 521         showAuthStatus();
 522
 523         // GET AUTHORIZATION request
 524         //Uri uri = Uri.parse(getString(R.string.oauth2_url_endpoint_auth));
 525         Uri uri = Uri.parse(mOAuthAuthEndpointText.getText().toString().trim());
 526         Uri.Builder uriBuilder = uri.buildUpon();
 527         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_RESPONSE_TYPE, getString(R.string.oauth2_response_type));
 528         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_REDIRECT_URI, getString(R.string.oauth2_redirect_uri));
 529         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_CLIENT_ID, getString(R.string.oauth2_client_id));
 530         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_SCOPE, getString(R.string.oauth2_scope));
 531         //uriBuilder.appendQueryParameter(OAuth2Constants.KEY_STATE, whateverwewant);
 532         uri = uriBuilder.build();
 533         Log_OC.d(TAG, "Starting browser to view " + uri.toString());
 534         Intent i = new Intent(Intent.ACTION_VIEW, uri);
 535         startActivity(i);
 536     }
 537
 538
 539     /**
 540      * Callback method invoked when a RemoteOperation executed by this Activity finishes.
 541      *
 542      * Dispatches the operation flow to the right method.
 543      */
 544     @Override
 545     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 546
 547         if (operation instanceof OwnCloudServerCheckOperation) {
 548             onOcServerCheckFinish((OwnCloudServerCheckOperation) operation, result);
 549
 550         } else if (operation instanceof OAuth2GetAccessToken) {
 551             onGetOAuthAccessTokenFinish((OAuth2GetAccessToken)operation, result);
 552
 553         } else if (operation instanceof ExistenceCheckOperation)  {
 554             onAuthorizationCheckFinish((ExistenceCheckOperation)operation, result);
 555
 556         }
 557     }
 558
 559
 560     /**
 561      * Processes the result of the server check performed when the user finishes the enter of the
 562      * server URL.
 563      *
 564      * @param operation     Server check performed.
 565      * @param result        Result of the check.
 566      */
 567     private void onOcServerCheckFinish(OwnCloudServerCheckOperation operation, RemoteOperationResult result) {
 568         if (operation.equals(mOcServerChkOperation)) {
 569             /// save result state
 570             mServerCheckedAndValid = result.isSuccess();
 571             mIsSslConn = (result.getCode() == ResultCode.OK_SSL);
 572             mOcServerChkOperation = null;
 573
 574             /// update status icon and text
 575             if (mServerCheckedAndValid) {
 576                 hideRefreshButton();
 577             } else {
 578                 showRefreshButton();
 579             }
 580             updateServerStatusIconAndText(result);
 581             showServerStatus();
 582
 583             /// very special case (TODO: move to a common place for all the remote operations)
 584             if (result.getCode() == ResultCode.SSL_RECOVERABLE_PEER_UNVERIFIED) {
 585                 mLastSslUntrustedServerResult = result;
 586                 showDialog(DIALOG_SSL_VALIDATOR);
 587             }
 588
 589             /// retrieve discovered version and normalize server URL
 590             mDiscoveredVersion = operation.getDiscoveredVersion();
 591             mHostBaseUrl = normalizeUrl(mHostUrlInput.getText().toString());
 592
 593             /// allow or not the user try to access the server
 594             mOkButton.setEnabled(mServerCheckedAndValid);
 595
 596         }   // else nothing ; only the last check operation is considered;
 597             // multiple can be triggered if the user amends a URL before a previous check can be triggered
 598     }
 599
 600
 601     private String normalizeUrl(String url) {
 602         if (url != null && url.length() > 0) {
 603             url = url.trim();
 604             if (!url.toLowerCase().startsWith("http://") &&
 605                     !url.toLowerCase().startsWith("https://")) {
 606                 if (mIsSslConn) {
 607                     url = "https://" + url;
 608                 } else {
 609                     url = "http://" + url;
 610                 }
 611
 612             }
 613             if (url.endsWith("/")) {
 614                 url = url.substring(0, url.length() - 1);
 615             }
 616         }
 617         return url;
 618     }
 619
 620     /**
 621      * Chooses the right icon and text to show to the user for the received operation result.
 622      *
 623      * @param result    Result of a remote operation performed in this activity
 624      */
 625     private void updateServerStatusIconAndText(RemoteOperationResult result) {
 626         mServerStatusIcon = R.drawable.common_error;    // the most common case in the switch below
 627
 628         switch (result.getCode()) {
 629         case OK_SSL:
 630             mServerStatusIcon = android.R.drawable.ic_secure;
 631             mServerStatusText = R.string.auth_secure_connection;
 632             break;
 633
 634         case OK_NO_SSL:
 635         case OK:
 636             if (mHostUrlInput.getText().toString().trim().toLowerCase().startsWith("http://") ) {
 637                 mServerStatusText = R.string.auth_connection_established;
 638                 mServerStatusIcon = R.drawable.ic_ok;
 639             } else {
 640                 mServerStatusText = R.string.auth_nossl_plain_ok_title;
 641                 mServerStatusIcon = android.R.drawable.ic_partial_secure;
 642             }
 643             break;
 644
 645         case NO_NETWORK_CONNECTION:
 646             mServerStatusIcon = R.drawable.no_network;
 647             mServerStatusText = R.string.auth_no_net_conn_title;
 648             break;
 649
 650         case SSL_RECOVERABLE_PEER_UNVERIFIED:
 651             mServerStatusText = R.string.auth_ssl_unverified_server_title;
 652             break;
 653         case BAD_OC_VERSION:
 654             mServerStatusText = R.string.auth_bad_oc_version_title;
 655             break;
 656         case WRONG_CONNECTION:
 657             mServerStatusText = R.string.auth_wrong_connection_title;
 658             break;
 659         case TIMEOUT:
 660             mServerStatusText = R.string.auth_timeout_title;
 661             break;
 662         case INCORRECT_ADDRESS:
 663             mServerStatusText = R.string.auth_incorrect_address_title;
 664             break;
 665         case SSL_ERROR:
 666             mServerStatusText = R.string.auth_ssl_general_error_title;
 667             break;
 668         case UNAUTHORIZED:
 669             mServerStatusText = R.string.auth_unauthorized;
 670             break;
 671         case HOST_NOT_AVAILABLE:
 672             mServerStatusText = R.string.auth_unknown_host_title;
 673             break;
 674         case INSTANCE_NOT_CONFIGURED:
 675             mServerStatusText = R.string.auth_not_configured_title;
 676             break;
 677         case FILE_NOT_FOUND:
 678             mServerStatusText = R.string.auth_incorrect_path_title;
 679             break;
 680         case OAUTH2_ERROR:
 681             mServerStatusText = R.string.auth_oauth_error;
 682             break;
 683         case OAUTH2_ERROR_ACCESS_DENIED:
 684             mServerStatusText = R.string.auth_oauth_error_access_denied;
 685             break;
 686         case UNHANDLED_HTTP_CODE:
 687         case UNKNOWN_ERROR:
 688             mServerStatusText = R.string.auth_unknown_error_title;
 689             break;
 690         default:
 691             mServerStatusText = 0;
 692             mServerStatusIcon = 0;
 693         }
 694     }
 695
 696
 697     /**
 698      * Chooses the right icon and text to show to the user for the received operation result.
 699      *
 700      * @param result    Result of a remote operation performed in this activity
 701      */
 702     private void updateAuthStatusIconAndText(RemoteOperationResult result) {
 703         mAuthStatusIcon = R.drawable.common_error;    // the most common case in the switch below
 704
 705         switch (result.getCode()) {
 706         case OK_SSL:
 707             mAuthStatusIcon = android.R.drawable.ic_secure;
 708             mAuthStatusText = R.string.auth_secure_connection;
 709             break;
 710
 711         case OK_NO_SSL:
 712         case OK:
 713             if (mHostUrlInput.getText().toString().trim().toLowerCase().startsWith("http://") ) {
 714                 mAuthStatusText = R.string.auth_connection_established;
 715                 mAuthStatusIcon = R.drawable.ic_ok;
 716             } else {
 717                 mAuthStatusText = R.string.auth_nossl_plain_ok_title;
 718                 mAuthStatusIcon = android.R.drawable.ic_partial_secure;
 719             }
 720             break;
 721
 722         case NO_NETWORK_CONNECTION:
 723             mAuthStatusIcon = R.drawable.no_network;
 724             mAuthStatusText = R.string.auth_no_net_conn_title;
 725             break;
 726
 727         case SSL_RECOVERABLE_PEER_UNVERIFIED:
 728             mAuthStatusText = R.string.auth_ssl_unverified_server_title;
 729             break;
 730         case BAD_OC_VERSION:
 731             mAuthStatusText = R.string.auth_bad_oc_version_title;
 732             break;
 733         case WRONG_CONNECTION:
 734             mAuthStatusText = R.string.auth_wrong_connection_title;
 735             break;
 736         case TIMEOUT:
 737             mAuthStatusText = R.string.auth_timeout_title;
 738             break;
 739         case INCORRECT_ADDRESS:
 740             mAuthStatusText = R.string.auth_incorrect_address_title;
 741             break;
 742         case SSL_ERROR:
 743             mAuthStatusText = R.string.auth_ssl_general_error_title;
 744             break;
 745         case UNAUTHORIZED:
 746             mAuthStatusText = R.string.auth_unauthorized;
 747             break;
 748         case HOST_NOT_AVAILABLE:
 749             mAuthStatusText = R.string.auth_unknown_host_title;
 750             break;
 751         case INSTANCE_NOT_CONFIGURED:
 752             mAuthStatusText = R.string.auth_not_configured_title;
 753             break;
 754         case FILE_NOT_FOUND:
 755             mAuthStatusText = R.string.auth_incorrect_path_title;
 756             break;
 757         case OAUTH2_ERROR:
 758             mAuthStatusText = R.string.auth_oauth_error;
 759             break;
 760         case OAUTH2_ERROR_ACCESS_DENIED:
 761             mAuthStatusText = R.string.auth_oauth_error_access_denied;
 762             break;
 763         case UNHANDLED_HTTP_CODE:
 764         case UNKNOWN_ERROR:
 765             mAuthStatusText = R.string.auth_unknown_error_title;
 766             break;
 767         default:
 768             mAuthStatusText = 0;
 769             mAuthStatusIcon = 0;
 770         }
 771     }
 772
 773
 774     /**
 775      * Processes the result of the request for and access token send
 776      * to an OAuth authorization server.
 777      *
 778      * @param operation     Operation performed requesting the access token.
 779      * @param result        Result of the operation.
 780      */
 781     private void onGetOAuthAccessTokenFinish(OAuth2GetAccessToken operation, RemoteOperationResult result) {
 782         try {
 783             dismissDialog(DIALOG_OAUTH2_LOGIN_PROGRESS);
 784         } catch (IllegalArgumentException e) {
 785             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 786         }
 787
 788         String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, true);
 789         if (result.isSuccess() && webdav_path != null) {
 790             /// be gentle with the user
 791             showDialog(DIALOG_LOGIN_PROGRESS);
 792
 793             /// time to test the retrieved access token on the ownCloud server
 794             mOAuthAccessToken = ((OAuth2GetAccessToken)operation).getResultTokenMap().get(OAuth2Constants.KEY_ACCESS_TOKEN);
 795             Log_OC.d(TAG, "Got ACCESS TOKEN: " + mOAuthAccessToken);
 796             mAuthCheckOperation = new ExistenceCheckOperation("", this, false);
 797             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this);
 798             client.setBearerCredentials(mOAuthAccessToken);
 799             mAuthCheckOperation.execute(client, this, mHandler);
 800
 801         } else {
 802             updateAuthStatusIconAndText(result);
 803             showAuthStatus();
 804             Log_OC.d(TAG, "Access failed: " + result.getLogMessage());
 805         }
 806     }
 807
 808
 809     /**
 810      * Processes the result of the access check performed to try the user credentials.
 811      *
 812      * Creates a new account through the AccountManager.
 813      *
 814      * @param operation     Access check performed.
 815      * @param result        Result of the operation.
 816      */
 817     private void onAuthorizationCheckFinish(ExistenceCheckOperation operation, RemoteOperationResult result) {
 818         try {
 819             dismissDialog(DIALOG_LOGIN_PROGRESS);
 820         } catch (IllegalArgumentException e) {
 821             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 822         }
 823
 824         if (result.isSuccess()) {
 825             Log_OC.d(TAG, "Successful access - time to save the account");
 826
 827             if (mAction == ACTION_CREATE) {
 828                 createAccount();
 829
 830             } else {
 831                 updateToken();
 832             }
 833
 834             finish();
 835
 836         } else {
 837             updateAuthStatusIconAndText(result);
 838             showAuthStatus();
 839             Log_OC.d(TAG, "Access failed: " + result.getLogMessage());
 840         }
 841     }
 842
 843
 844     /**
 845      * Sets the proper response to get that the Account Authenticator that started this activity saves
 846      * a new authorization token for mAccount.
 847      */
 848     private void updateToken() {
 849         Bundle response = new Bundle();
 850         response.putString(AccountManager.KEY_ACCOUNT_NAME, mAccount.name);
 851         response.putString(AccountManager.KEY_ACCOUNT_TYPE, mAccount.type);
 852         boolean isOAuth = mOAuth2Check.isChecked();
 853         if (isOAuth) {
 854             response.putString(AccountManager.KEY_AUTHTOKEN, mOAuthAccessToken);
 855             // the next line is necessary; by now, notifications are calling directly to the AuthenticatorActivity to update, without AccountManager intervention
 856             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
 857         } else {
 858             response.putString(AccountManager.KEY_AUTHTOKEN, mPasswordInput.getText().toString());
 859             mAccountMgr.setPassword(mAccount, mPasswordInput.getText().toString());
 860         }
 861         setAccountAuthenticatorResult(response);
 862     }
 863
 864
 865     /**
 866      * Creates a new account through the Account Authenticator that started this activity.
 867      *
 868      * This makes the account permanent.
 869      *
 870      * TODO Decide how to name the OAuth accounts
 871      */
 872     private void createAccount() {
 873         /// create and save new ownCloud account
 874         boolean isOAuth = mOAuth2Check.isChecked();
 875
 876         Uri uri = Uri.parse(mHostBaseUrl);
 877         String username = mUsernameInput.getText().toString().trim();
 878         if (isOAuth) {
 879             username = "OAuth_user" + (new java.util.Random(System.currentTimeMillis())).nextLong();
 880         }
 881         String accountName = username + "@" + uri.getHost();
 882         if (uri.getPort() >= 0) {
 883             accountName += ":" + uri.getPort();
 884         }
 885         mAccount = new Account(accountName, AccountAuthenticator.ACCOUNT_TYPE);
 886         if (isOAuth) {
 887             mAccountMgr.addAccountExplicitly(mAccount, "", null);  // with our implementation, the password is never input in the app
 888         } else {
 889             mAccountMgr.addAccountExplicitly(mAccount, mPasswordInput.getText().toString(), null);
 890         }
 891
 892         /// add the new account as default in preferences, if there is none already
 893         Account defaultAccount = AccountUtils.getCurrentOwnCloudAccount(this);
 894         if (defaultAccount == null) {
 895             SharedPreferences.Editor editor = PreferenceManager
 896                     .getDefaultSharedPreferences(this).edit();
 897             editor.putString("select_oc_account", accountName);
 898             editor.commit();
 899         }
 900
 901         /// prepare result to return to the Authenticator
 902         //  TODO check again what the Authenticator makes with it; probably has the same effect as addAccountExplicitly, but it's not well done
 903         final Intent intent = new Intent();
 904         intent.putExtra(AccountManager.KEY_ACCOUNT_TYPE,    AccountAuthenticator.ACCOUNT_TYPE);
 905         intent.putExtra(AccountManager.KEY_ACCOUNT_NAME,    mAccount.name);
 906         if (!isOAuth)
 907             intent.putExtra(AccountManager.KEY_AUTHTOKEN,   AccountAuthenticator.ACCOUNT_TYPE); // TODO check this; not sure it's right; maybe
 908         intent.putExtra(AccountManager.KEY_USERDATA,        username);
 909         if (isOAuth) {
 910             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
 911         }
 912         /// add user data to the new account; TODO probably can be done in the last parameter addAccountExplicitly, or in KEY_USERDATA
 913         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_VERSION,    mDiscoveredVersion.toString());
 914         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_BASE_URL,   mHostBaseUrl);
 915         if (isOAuth)
 916             mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_SUPPORTS_OAUTH2, "TRUE");  // TODO this flag should be unnecessary
 917
 918         setAccountAuthenticatorResult(intent.getExtras());
 919         setResult(RESULT_OK, intent);
 920
 921         /// immediately request for the synchronization of the new account
 922         Bundle bundle = new Bundle();
 923         bundle.putBoolean(ContentResolver.SYNC_EXTRAS_MANUAL, true);
 924         ContentResolver.requestSync(mAccount, AccountAuthenticator.AUTHORITY, bundle);
 925     }
 926
 927
 928     /**
 929      * {@inheritDoc}
 930      *
 931      * Necessary to update the contents of the SSL Dialog
 932      *
 933      * TODO move to some common place for all possible untrusted SSL failures
 934      */
 935     @Override
 936     protected void onPrepareDialog(int id, Dialog dialog, Bundle args) {
 937         switch (id) {
 938         case DIALOG_LOGIN_PROGRESS:
 939         case DIALOG_CERT_NOT_SAVED:
 940         case DIALOG_OAUTH2_LOGIN_PROGRESS:
 941             break;
 942         case DIALOG_SSL_VALIDATOR: {
 943             ((SslValidatorDialog)dialog).updateResult(mLastSslUntrustedServerResult);
 944             break;
 945         }
 946         default:
 947             Log_OC.e(TAG, "Incorrect dialog called with id = " + id);
 948         }
 949     }
 950
 951
 952     /**
 953      * {@inheritDoc}
 954      */
 955     @Override
 956     protected Dialog onCreateDialog(int id) {
 957         Dialog dialog = null;
 958         switch (id) {
 959         case DIALOG_LOGIN_PROGRESS: {
 960             /// simple progress dialog
 961             ProgressDialog working_dialog = new ProgressDialog(this);
 962             working_dialog.setMessage(getResources().getString(R.string.auth_trying_to_login));
 963             working_dialog.setIndeterminate(true);
 964             working_dialog.setCancelable(true);
 965             working_dialog
 966                     .setOnCancelListener(new DialogInterface.OnCancelListener() {
 967                         @Override
 968                         public void onCancel(DialogInterface dialog) {
 969                             /// TODO study if this is enough
 970                             Log_OC.i(TAG, "Login canceled");
 971                             if (mOperationThread != null) {
 972                                 mOperationThread.interrupt();
 973                                 finish();
 974                             }
 975                         }
 976                     });
 977             dialog = working_dialog;
 978             break;
 979         }
 980         case DIALOG_OAUTH2_LOGIN_PROGRESS: {
 981             ProgressDialog working_dialog = new ProgressDialog(this);
 982             working_dialog.setMessage(String.format("Getting authorization"));
 983             working_dialog.setIndeterminate(true);
 984             working_dialog.setCancelable(true);
 985             working_dialog
 986             .setOnCancelListener(new DialogInterface.OnCancelListener() {
 987                 @Override
 988                 public void onCancel(DialogInterface dialog) {
 989                     Log_OC.i(TAG, "Login canceled");
 990                     finish();
 991                 }
 992             });
 993             dialog = working_dialog;
 994             break;
 995         }
 996         case DIALOG_SSL_VALIDATOR: {
 997             /// TODO start to use new dialog interface, at least for this (it is a FragmentDialog already)
 998             dialog = SslValidatorDialog.newInstance(this, mLastSslUntrustedServerResult, this);
 999             break;
1000         }
1001         case DIALOG_CERT_NOT_SAVED: {
1002             AlertDialog.Builder builder = new AlertDialog.Builder(this);
1003             builder.setMessage(getResources().getString(R.string.ssl_validator_not_saved));
1004             builder.setCancelable(false);
1005             builder.setPositiveButton(R.string.common_ok, new DialogInterface.OnClickListener() {
1006                     @Override
1007                     public void onClick(DialogInterface dialog, int which) {
1008                         dialog.dismiss();
1009                     };
1010                 });
1011             dialog = builder.create();
1012             break;
1013         }
1014         default:
1015             Log_OC.e(TAG, "Incorrect dialog called with id = " + id);
1016         }
1017         return dialog;
1018     }
1019
1020
1021     /**
1022      * Starts and activity to open the 'new account' page in the ownCloud web site
1023      *
1024      * @param view      'Account register' button
1025      */
1026     public void onRegisterClick(View view) {
1027         Intent register = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.url_account_register)));
1028         setResult(RESULT_CANCELED);
1029         startActivity(register);
1030     }
1031
1032
1033     /**
1034      * Updates the content and visibility state of the icon and text associated
1035      * to the last check on the ownCloud server.
1036      */
1037     private void showServerStatus() {
1038         TextView tv = (TextView) findViewById(R.id.server_status_text);
1039
1040         if (mServerStatusIcon == 0 && mServerStatusText == 0) {
1041             tv.setVisibility(View.INVISIBLE);
1042
1043         } else {
1044             tv.setText(mServerStatusText);
1045             tv.setCompoundDrawablesWithIntrinsicBounds(mServerStatusIcon, 0, 0, 0);
1046             tv.setVisibility(View.VISIBLE);
1047         }
1048
1049     }
1050
1051
1052     /**
1053      * Updates the content and visibility state of the icon and text associated
1054      * to the interactions with the OAuth authorization server.
1055      */
1056     private void showAuthStatus() {
1057         if (mAuthStatusIcon == 0 && mAuthStatusText == 0) {
1058             mAuthStatusLayout.setVisibility(View.INVISIBLE);
1059
1060         } else {
1061             mAuthStatusLayout.setText(mAuthStatusText);
1062             mAuthStatusLayout.setCompoundDrawablesWithIntrinsicBounds(mAuthStatusIcon, 0, 0, 0);
1063             mAuthStatusLayout.setVisibility(View.VISIBLE);
1064         }
1065     }
1066
1067
1068     private void showRefreshButton() {
1069         mHostUrlInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_action_refresh_black, 0);
1070     }
1071
1072     private void hideRefreshButton() {
1073         mHostUrlInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0);
1074     }
1075
1076     /**
1077      * Called when the refresh button in the input field for ownCloud host is clicked.
1078      *
1079      * Performs a new check on the URL in the input field.
1080      *
1081      * @param view      Refresh 'button'
1082      */
1083     public void onRefreshClick(View view) {
1084         checkOcServer();
1085     }
1086
1087
1088     /**
1089      * Called when the eye icon in the password field is clicked.
1090      *
1091      * Toggles the visibility of the password in the field.
1092      *
1093      * @param view      'View password' 'button'
1094      */
1095     public void onViewPasswordClick(View view) {
1096         int selectionStart = mPasswordInput.getSelectionStart();
1097         int selectionEnd = mPasswordInput.getSelectionEnd();
1098         int input_type = mPasswordInput.getInputType();
1099         if ((input_type & InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD) == InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD) {
1100             input_type = InputType.TYPE_CLASS_TEXT
1101                     | InputType.TYPE_TEXT_VARIATION_PASSWORD;
1102         } else {
1103             input_type = InputType.TYPE_CLASS_TEXT
1104                     | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD;
1105         }
1106         mPasswordInput.setInputType(input_type);
1107         mPasswordInput.setSelection(selectionStart, selectionEnd);
1108     }
1109
1110
1111     /**
1112      * Called when the checkbox for OAuth authorization is clicked.
1113      *
1114      * Hides or shows the input fields for user & password.
1115      *
1116      * @param view      'View password' 'button'
1117      */
1118     public void onCheckClick(View view) {
1119         CheckBox oAuth2Check = (CheckBox)view;
1120         changeViewByOAuth2Check(oAuth2Check.isChecked());
1121
1122     }
1123
1124     /**
1125      * Changes the visibility of input elements depending upon the kind of authorization
1126      * chosen by the user: basic or OAuth
1127      *
1128      * @param checked       'True' when OAuth is selected.
1129      */
1130     public void changeViewByOAuth2Check(Boolean checked) {
1131
1132         if (checked) {
1133             mOAuthAuthEndpointText.setVisibility(View.VISIBLE);
1134             mOAuthTokenEndpointText.setVisibility(View.VISIBLE);
1135             mUsernameInput.setVisibility(View.GONE);
1136             mPasswordInput.setVisibility(View.GONE);
1137             mViewPasswordButton.setVisibility(View.GONE);
1138         } else {
1139             mOAuthAuthEndpointText.setVisibility(View.GONE);
1140             mOAuthTokenEndpointText.setVisibility(View.GONE);
1141             mUsernameInput.setVisibility(View.VISIBLE);
1142             mPasswordInput.setVisibility(View.VISIBLE);
1143             mViewPasswordButton.setVisibility(View.INVISIBLE);
1144         }
1145
1146     }
1147
1148     /**
1149      * Called from SslValidatorDialog when a new server certificate was correctly saved.
1150      */
1151     public void onSavedCertificate() {
1152         mOperationThread = mOcServerChkOperation.retry(this, mHandler);
1153     }
1154
1155     /**
1156      * Called from SslValidatorDialog when a new server certificate could not be saved
1157      * when the user requested it.
1158      */
1159     @Override
1160     public void onFailedSavingCertificate() {
1161         showDialog(DIALOG_CERT_NOT_SAVED);
1162     }
1163
1164
1165     /**
1166      *  Called when the 'action' button in an IME is pressed ('enter' in software keyboard).
1167      *
1168      *  Used to trigger the authorization check when the user presses 'enter' after writing the password.
1169      */
1170     @Override
1171     public boolean onEditorAction(TextView inputField, int actionId, KeyEvent event) {
1172         if (inputField != null && inputField.equals(mPasswordInput) &&
1173                 actionId == EditorInfo.IME_ACTION_DONE) {
1174             if (mOkButton.isEnabled()) {
1175                 mOkButton.performClick();
1176             }
1177         }
1178         return false;   // always return false to grant that the software keyboard is hidden anyway
1179     }
1180
1181
1182     private abstract static class RightDrawableOnTouchListener implements OnTouchListener  {
1183
1184         private int fuzz = 10;
1185
1186         /**
1187          * {@inheritDoc}
1188          */
1189         @Override
1190         public boolean onTouch(View view, MotionEvent event) {
1191             if (event.getAction() == MotionEvent.ACTION_DOWN) {
1192                 Drawable rightDrawable = null;
1193                 if (view instanceof TextView) {
1194                     Drawable[] drawables = ((TextView)view).getCompoundDrawables();
1195                     if (drawables.length > 2) {
1196                         rightDrawable = drawables[2];
1197                     }
1198                 }
1199                 if (rightDrawable != null) {
1200                     final int x = (int) event.getX();
1201                     final int y = (int) event.getY();
1202                     final Rect bounds = rightDrawable.getBounds();
1203                     if (x >= (view.getRight() - bounds.width() - fuzz) && x <= (view.getRight() - view.getPaddingRight() + fuzz)
1204                         && y >= (view.getPaddingTop() - fuzz) && y <= (view.getHeight() - view.getPaddingBottom()) + fuzz) {
1205
1206                         return onDrawableTouch(event);
1207                     }
1208                 }
1209             }
1210             return false;
1211         }
1212
1213         public abstract boolean onDrawableTouch(final MotionEvent event);
1214     }
1215
1216 }