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.Editable;
  52 import android.text.InputType;
  53 import android.text.TextWatcher;
  54 import android.view.KeyEvent;
  55 import android.view.MotionEvent;
  56 import android.view.View;
  57 import android.view.View.OnFocusChangeListener;
  58 import android.view.View.OnTouchListener;
  59 import android.view.Window;
  60 import android.view.inputmethod.EditorInfo;
  61 import android.widget.CheckBox;
  62 import android.widget.EditText;
  63 import android.widget.Button;
  64 import android.widget.ImageView;
  65 import android.widget.TextView;
  66 import android.widget.Toast;
  67 import android.widget.TextView.OnEditorActionListener;
  68
  69 import com.owncloud.android.R;
  70
  71 import eu.alefzero.webdav.WebdavClient;
  72
  73 /**
  74  * This Activity is used to add an ownCloud account to the App
  75  *
  76  * @author Bartek Przybylski
  77  * @author David A. Velasco
  78  */
  79 public class AuthenticatorActivity extends AccountAuthenticatorActivity
  80         implements  OnRemoteOperationListener, OnSslValidatorListener, OnFocusChangeListener, OnEditorActionListener {
  81
  82     private static final String TAG = AuthenticatorActivity.class.getSimpleName();
  83
  84     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  85     public static final String EXTRA_USER_NAME = "USER_NAME";
  86     public static final String EXTRA_HOST_NAME = "HOST_NAME";
  87     public static final String EXTRA_ACTION = "ACTION";
  88
  89     private static final String KEY_HOST_URL_TEXT = "HOST_URL_TEXT";
  90     private static final String KEY_OC_VERSION = "OC_VERSION";
  91     private static final String KEY_ACCOUNT = "ACCOUNT";
  92     private static final String KEY_SERVER_VALID = "SERVER_VALID";
  93     private static final String KEY_SERVER_CHECKED = "SERVER_CHECKED";
  94     private static final String KEY_SERVER_CHECK_IN_PROGRESS = "SERVER_CHECK_IN_PROGRESS";
  95     private static final String KEY_SERVER_STATUS_TEXT = "SERVER_STATUS_TEXT";
  96     private static final String KEY_SERVER_STATUS_ICON = "SERVER_STATUS_ICON";
  97     private static final String KEY_IS_SSL_CONN = "IS_SSL_CONN";
  98     private static final String KEY_AUTH_STATUS_TEXT = "AUTH_STATUS_TEXT";
  99     private static final String KEY_AUTH_STATUS_ICON = "AUTH_STATUS_ICON";
 100
 101     private static final String OAUTH_MODE_ON = "on";
 102     private static final String OAUTH_MODE_OFF = "off";
 103     private static final String OAUTH_MODE_OPTIONAL = "optional";
 104
 105     private static final int DIALOG_LOGIN_PROGRESS = 0;
 106     private static final int DIALOG_SSL_VALIDATOR = 1;
 107     private static final int DIALOG_CERT_NOT_SAVED = 2;
 108     private static final int DIALOG_OAUTH2_LOGIN_PROGRESS = 3;
 109
 110     public static final byte ACTION_CREATE = 0;
 111     public static final byte ACTION_UPDATE_TOKEN = 1;
 112
 113
 114     private String mHostBaseUrl;
 115     private OwnCloudVersion mDiscoveredVersion;
 116
 117     private int mServerStatusText, mServerStatusIcon;
 118     private boolean mServerIsChecked, mServerIsValid, mIsSslConn;
 119     private int mAuthStatusText, mAuthStatusIcon;
 120
 121     private final Handler mHandler = new Handler();
 122     private Thread mOperationThread;
 123     private OwnCloudServerCheckOperation mOcServerChkOperation;
 124     private ExistenceCheckOperation mAuthCheckOperation;
 125     private RemoteOperationResult mLastSslUntrustedServerResult;
 126
 127     private Uri mNewCapturedUriFromOAuth2Redirection;
 128
 129     private AccountManager mAccountMgr;
 130     private boolean mJustCreated;
 131     private byte mAction;
 132     private Account mAccount;
 133
 134     private ImageView mViewPasswordButton;
 135     private EditText mHostUrlInput;
 136     private EditText mUsernameInput;
 137     private EditText mPasswordInput;
 138     private CheckBox mOAuth2Check;
 139     private String mOAuthAccessToken;
 140     private View mOkButton;
 141     private TextView mAuthStatusLayout;
 142
 143     private TextView mOAuthAuthEndpointText;
 144     private TextView mOAuthTokenEndpointText;
 145
 146
 147     /**
 148      * {@inheritDoc}
 149      *
 150      * IMPORTANT ENTRY POINT 1: activity is shown to the user
 151      */
 152     @Override
 153     protected void onCreate(Bundle savedInstanceState) {
 154         super.onCreate(savedInstanceState);
 155         getWindow().requestFeature(Window.FEATURE_NO_TITLE);
 156
 157         /// set view and get references to view elements
 158         setContentView(R.layout.account_setup);
 159         mViewPasswordButton = (ImageView) findViewById(R.id.viewPasswordButton);
 160         mHostUrlInput = (EditText) findViewById(R.id.hostUrlInput);
 161         mUsernameInput = (EditText) findViewById(R.id.account_username);
 162         mPasswordInput = (EditText) findViewById(R.id.account_password);
 163         mOAuthAuthEndpointText = (TextView)findViewById(R.id.oAuthEntryPoint_1);
 164         mOAuthTokenEndpointText = (TextView)findViewById(R.id.oAuthEntryPoint_2);
 165         mOAuth2Check = (CheckBox) findViewById(R.id.oauth_onOff_check);
 166         mOkButton = findViewById(R.id.buttonOK);
 167         mAuthStatusLayout = (TextView) findViewById(R.id.auth_status_text);
 168
 169         /// complete label for 'register account' button
 170         Button b = (Button) findViewById(R.id.account_register);
 171         if (b != null) {
 172             b.setText(String.format(getString(R.string.auth_register), getString(R.string.app_name)));
 173         }
 174
 175         /// initialization
 176         mAccountMgr = AccountManager.get(this);
 177         mNewCapturedUriFromOAuth2Redirection = null;
 178         mAction = getIntent().getByteExtra(EXTRA_ACTION, ACTION_CREATE);
 179         mAccount = null;
 180         mHostBaseUrl = "";
 181
 182         if (savedInstanceState == null) {
 183             /// connection state and info
 184             mServerStatusText = mServerStatusIcon = 0;
 185             mServerIsValid = false;
 186             mServerIsChecked = false;
 187             mIsSslConn = false;
 188             mAuthStatusText = mAuthStatusIcon = 0;
 189
 190             /// retrieve extras from intent
 191             String tokenType = getIntent().getExtras().getString(AccountAuthenticator.KEY_AUTH_TOKEN_TYPE);
 192             boolean oAuthRequired = AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN.equals(tokenType) || OAUTH_MODE_ON.equals(getString(R.string.oauth2_mode));
 193
 194             mAccount = getIntent().getExtras().getParcelable(EXTRA_ACCOUNT);
 195             if (mAccount != null) {
 196                 String ocVersion = mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_OC_VERSION);
 197                 if (ocVersion != null) {
 198                     mDiscoveredVersion = new OwnCloudVersion(ocVersion);
 199                 }
 200                 mHostBaseUrl = normalizeUrl(mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_OC_BASE_URL));
 201                 mHostUrlInput.setText(mHostBaseUrl);
 202                 String userName = mAccount.name.substring(0, mAccount.name.lastIndexOf('@'));
 203                 mUsernameInput.setText(userName);
 204                 oAuthRequired = (mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_SUPPORTS_OAUTH2) != null);
 205             }
 206             mOAuth2Check.setChecked(oAuthRequired);
 207             changeViewByOAuth2Check(oAuthRequired);
 208
 209
 210         } else {
 211             /// connection state and info
 212             mServerIsValid = savedInstanceState.getBoolean(KEY_SERVER_VALID);
 213             mServerIsChecked = savedInstanceState.getBoolean(KEY_SERVER_CHECKED);
 214             mServerStatusText = savedInstanceState.getInt(KEY_SERVER_STATUS_TEXT);
 215             mServerStatusIcon = savedInstanceState.getInt(KEY_SERVER_STATUS_ICON);
 216             mIsSslConn = savedInstanceState.getBoolean(KEY_IS_SSL_CONN);
 217             mAuthStatusText = savedInstanceState.getInt(KEY_AUTH_STATUS_TEXT);
 218             mAuthStatusIcon = savedInstanceState.getInt(KEY_AUTH_STATUS_ICON);
 219
 220             /// server data
 221             String ocVersion = savedInstanceState.getString(KEY_OC_VERSION);
 222             if (ocVersion != null) {
 223                 mDiscoveredVersion = new OwnCloudVersion(ocVersion);
 224             }
 225             mHostBaseUrl = savedInstanceState.getString(KEY_HOST_URL_TEXT);
 226
 227             // account data, if updating
 228             mAccount = savedInstanceState.getParcelable(KEY_ACCOUNT);
 229
 230             // check if server check was interrupted by a configuration change
 231             if (savedInstanceState.getBoolean(KEY_SERVER_CHECK_IN_PROGRESS, false)) {
 232                 checkOcServer();
 233             }
 234
 235         }
 236
 237         showServerStatus();
 238         showAuthStatus();
 239         if (mServerIsChecked && !mServerIsValid) showRefreshButton();
 240         mOkButton.setEnabled(mServerIsValid); // state not automatically recovered in configuration changes
 241
 242         if (!OAUTH_MODE_OPTIONAL.equals(getString(R.string.oauth2_mode))) {
 243             mOAuth2Check.setVisibility(View.GONE);
 244         }
 245
 246         if (mAction == ACTION_UPDATE_TOKEN) {
 247             /// lock things that should not change
 248             mHostUrlInput.setEnabled(false);
 249             mUsernameInput.setEnabled(false);
 250             mOAuth2Check.setVisibility(View.GONE);
 251             if (!mServerIsValid && mOcServerChkOperation == null) {
 252                 checkOcServer();
 253             }
 254         }
 255
 256         mPasswordInput.setText("");     // clean password to avoid social hacking (disadvantage: password in removed if the device is turned aside)
 257         mJustCreated = true;
 258
 259         /// bind view elements to listeners
 260         mHostUrlInput.setOnFocusChangeListener(this);
 261         mHostUrlInput.setOnTouchListener(new RightDrawableOnTouchListener() {
 262             @Override
 263             public boolean onDrawableTouch(final MotionEvent event) {
 264                 AuthenticatorActivity.this.onRefreshClick(mHostUrlInput);
 265                 return true;
 266             }
 267         });
 268         mHostUrlInput.addTextChangedListener(new TextWatcher() {
 269
 270             @Override
 271             public void afterTextChanged(Editable s) {
 272                 if (!mHostBaseUrl.equals(normalizeUrl(mHostUrlInput.getText().toString()))) {
 273                     mOkButton.setEnabled(false);
 274                 }
 275             }
 276
 277             @Override
 278             public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
 279
 280             @Override
 281             public void onTextChanged(CharSequence s, int start, int before, int count) {}
 282
 283         });
 284         mPasswordInput.setOnFocusChangeListener(this);
 285         mPasswordInput.setImeOptions(EditorInfo.IME_ACTION_DONE);
 286         mPasswordInput.setOnEditorActionListener(this);
 287     }
 288
 289     /**
 290      * Saves relevant state before {@link #onPause()}
 291      *
 292      * Do NOT save {@link #mNewCapturedUriFromOAuth2Redirection}; it keeps a temporal flag, intended to defer the
 293      * processing of the redirection caught in {@link #onNewIntent(Intent)} until {@link #onResume()}
 294      *
 295      * See {@link #loadSavedInstanceState(Bundle)}
 296      */
 297     @Override
 298     protected void onSaveInstanceState(Bundle outState) {
 299         super.onSaveInstanceState(outState);
 300
 301         /// connection state and info
 302         outState.putInt(KEY_SERVER_STATUS_TEXT, mServerStatusText);
 303         outState.putInt(KEY_SERVER_STATUS_ICON, mServerStatusIcon);
 304         outState.putBoolean(KEY_SERVER_VALID, mServerIsValid);
 305         outState.putBoolean(KEY_SERVER_CHECKED, mServerIsChecked);
 306         outState.putBoolean(KEY_SERVER_CHECK_IN_PROGRESS, (!mServerIsValid && mOcServerChkOperation != null));
 307         outState.putBoolean(KEY_IS_SSL_CONN, mIsSslConn);
 308         outState.putInt(KEY_AUTH_STATUS_ICON, mAuthStatusIcon);
 309         outState.putInt(KEY_AUTH_STATUS_TEXT, mAuthStatusText);
 310
 311         /// server data
 312         if (mDiscoveredVersion != null) {
 313             outState.putString(KEY_OC_VERSION, mDiscoveredVersion.toString());
 314         }
 315         outState.putString(KEY_HOST_URL_TEXT, mHostBaseUrl);
 316
 317         /// account data, if updating
 318         if (mAccount != null) {
 319             outState.putParcelable(KEY_ACCOUNT, mAccount);
 320         }
 321
 322     }
 323
 324
 325     /**
 326      * The redirection triggered by the OAuth authentication server as response to the GET AUTHORIZATION request
 327      * is caught here.
 328      *
 329      * To make this possible, this activity needs to be qualified with android:launchMode = "singleTask" in the
 330      * AndroidManifest.xml file.
 331      */
 332     @Override
 333     protected void onNewIntent (Intent intent) {
 334         Log_OC.d(TAG, "onNewIntent()");
 335         Uri data = intent.getData();
 336         if (data != null && data.toString().startsWith(getString(R.string.oauth2_redirect_uri))) {
 337             mNewCapturedUriFromOAuth2Redirection = data;
 338         }
 339     }
 340
 341
 342     /**
 343      * The redirection triggered by the OAuth authentication server as response to the GET AUTHORIZATION, and
 344      * deferred in {@link #onNewIntent(Intent)}, is processed here.
 345      */
 346     @Override
 347     protected void onResume() {
 348         super.onResume();
 349         // the state of mOAuth2Check is automatically recovered between configuration changes, but not before onCreate() finishes; so keep the next lines here
 350         changeViewByOAuth2Check(mOAuth2Check.isChecked());
 351         if (mAction == ACTION_UPDATE_TOKEN && mJustCreated) {
 352             if (mOAuth2Check.isChecked())
 353                 Toast.makeText(this, R.string.auth_expired_oauth_token_toast, Toast.LENGTH_LONG).show();
 354             else
 355                 Toast.makeText(this, R.string.auth_expired_basic_auth_toast, Toast.LENGTH_LONG).show();
 356         }
 357
 358         if (mNewCapturedUriFromOAuth2Redirection != null) {
 359             getOAuth2AccessTokenFromCapturedRedirection();
 360         }
 361
 362         mJustCreated = false;
 363     }
 364
 365
 366     /**
 367      * Parses the redirection with the response to the GET AUTHORIZATION request to the
 368      * oAuth server and requests for the access token (GET ACCESS TOKEN)
 369      */
 370     private void getOAuth2AccessTokenFromCapturedRedirection() {
 371         /// Parse data from OAuth redirection
 372         String queryParameters = mNewCapturedUriFromOAuth2Redirection.getQuery();
 373         mNewCapturedUriFromOAuth2Redirection = null;
 374
 375         /// Showing the dialog with instructions for the user.
 376         showDialog(DIALOG_OAUTH2_LOGIN_PROGRESS);
 377
 378         /// GET ACCESS TOKEN to the oAuth server
 379         RemoteOperation operation = new OAuth2GetAccessToken(   getString(R.string.oauth2_client_id),
 380                                                                 getString(R.string.oauth2_redirect_uri),
 381                                                                 getString(R.string.oauth2_grant_type),
 382                                                                 queryParameters);
 383         //WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(getString(R.string.oauth2_url_endpoint_access)), getApplicationContext());
 384         WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mOAuthTokenEndpointText.getText().toString().trim()), getApplicationContext());
 385         operation.execute(client, this, mHandler);
 386     }
 387
 388
 389
 390     /**
 391      * Handles the change of focus on the text inputs for the server URL and the password
 392      */
 393     public void onFocusChange(View view, boolean hasFocus) {
 394         if (view.getId() == R.id.hostUrlInput && !hasFocus) {
 395             onUrlInputFocusLost((TextView) view);
 396
 397         } else if (view.getId() == R.id.account_password) {
 398             onPasswordFocusChanged((TextView) view, hasFocus);
 399         }
 400     }
 401
 402
 403     /**
 404      * Handles changes in focus on the text input for the server URL.
 405      *
 406      * IMPORTANT ENTRY POINT 2: When (!hasFocus), user wrote the server URL and changed to
 407      * other field. The operation to check the existence of the server in the entered URL is
 408      * started.
 409      *
 410      * When hasFocus:    user 'comes back' to write again the server URL.
 411      *
 412      * @param hostInput     TextView with the URL input field receiving the change of focus.
 413      */
 414     private void onUrlInputFocusLost(TextView hostInput) {
 415         if (!mHostBaseUrl.equals(normalizeUrl(mHostUrlInput.getText().toString()))) {
 416             checkOcServer();
 417         } else {
 418             mOkButton.setEnabled(mServerIsValid);
 419         }
 420     }
 421
 422
 423     private void checkOcServer() {
 424         String uri = mHostUrlInput.getText().toString().trim();
 425         mServerIsValid = false;
 426         mServerIsChecked = false;
 427         mOkButton.setEnabled(false);
 428         mDiscoveredVersion = null;
 429         hideRefreshButton();
 430         if (uri.length() != 0) {
 431             mServerStatusText = R.string.auth_testing_connection;
 432             mServerStatusIcon = R.drawable.progress_small;
 433             showServerStatus();
 434             mOcServerChkOperation = new  OwnCloudServerCheckOperation(uri, this);
 435             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(uri), this);
 436             mOperationThread = mOcServerChkOperation.execute(client, this, mHandler);
 437         } else {
 438             mServerStatusText = 0;
 439             mServerStatusIcon = 0;
 440             showServerStatus();
 441         }
 442     }
 443
 444
 445     /**
 446      * Handles changes in focus on the text input for the password (basic authorization).
 447      *
 448      * When (hasFocus), the button to toggle password visibility is shown.
 449      *
 450      * When (!hasFocus), the button is made invisible and the password is hidden.
 451      *
 452      * @param passwordInput    TextView with the password input field receiving the change of focus.
 453      * @param hasFocus          'True' if focus is received, 'false' if is lost
 454      */
 455     private void onPasswordFocusChanged(TextView passwordInput, boolean hasFocus) {
 456         if (hasFocus) {
 457             mViewPasswordButton.setVisibility(View.VISIBLE);
 458         } else {
 459             int input_type = InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD;
 460             passwordInput.setInputType(input_type);
 461             mViewPasswordButton.setVisibility(View.INVISIBLE);
 462         }
 463     }
 464
 465
 466
 467     /**
 468      * Cancels the authenticator activity
 469      *
 470      * IMPORTANT ENTRY POINT 3: Never underestimate the importance of cancellation
 471      *
 472      * This method is bound in the layout/acceoun_setup.xml resource file.
 473      *
 474      * @param view      Cancel button
 475      */
 476     public void onCancelClick(View view) {
 477         setResult(RESULT_CANCELED);     // TODO review how is this related to AccountAuthenticator (debugging)
 478         finish();
 479     }
 480
 481
 482
 483     /**
 484      * Checks the credentials of the user in the root of the ownCloud server
 485      * before creating a new local account.
 486      *
 487      * For basic authorization, a check of existence of the root folder is
 488      * performed.
 489      *
 490      * For OAuth, starts the flow to get an access token; the credentials test
 491      * is postponed until it is available.
 492      *
 493      * IMPORTANT ENTRY POINT 4
 494      *
 495      * @param view      OK button
 496      */
 497     public void onOkClick(View view) {
 498         // this check should be unnecessary
 499         if (mDiscoveredVersion == null || !mDiscoveredVersion.isVersionValid()  || mHostBaseUrl == null || mHostBaseUrl.length() == 0) {
 500             mServerStatusIcon = R.drawable.common_error;
 501             mServerStatusText = R.string.auth_wtf_reenter_URL;
 502             showServerStatus();
 503             mOkButton.setEnabled(false);
 504             Log_OC.wtf(TAG,  "The user was allowed to click 'connect' to an unchecked server!!");
 505             return;
 506         }
 507
 508         if (mOAuth2Check.isChecked()) {
 509             startOauthorization();
 510
 511         } else {
 512             checkBasicAuthorization();
 513         }
 514     }
 515
 516
 517     /**
 518      * Tests the credentials entered by the user performing a check of existence on
 519      * the root folder of the ownCloud server.
 520      */
 521     private void checkBasicAuthorization() {
 522         /// get the path to the root folder through WebDAV from the version server
 523         String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, false);
 524
 525         /// get basic credentials entered by user
 526         String username = mUsernameInput.getText().toString();
 527         String password = mPasswordInput.getText().toString();
 528
 529         /// be gentle with the user
 530         showDialog(DIALOG_LOGIN_PROGRESS);
 531
 532         /// test credentials accessing the root folder
 533         mAuthCheckOperation = new  ExistenceCheckOperation("", this, false);
 534         WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this);
 535         client.setBasicCredentials(username, password);
 536         mOperationThread = mAuthCheckOperation.execute(client, this, mHandler);
 537     }
 538
 539
 540     /**
 541      * Starts the OAuth 'grant type' flow to get an access token, with
 542      * a GET AUTHORIZATION request to the BUILT-IN authorization server.
 543      */
 544     private void startOauthorization() {
 545         // be gentle with the user
 546         mAuthStatusIcon = R.drawable.progress_small;
 547         mAuthStatusText = R.string.oauth_login_connection;
 548         showAuthStatus();
 549
 550         // GET AUTHORIZATION request
 551         //Uri uri = Uri.parse(getString(R.string.oauth2_url_endpoint_auth));
 552         Uri uri = Uri.parse(mOAuthAuthEndpointText.getText().toString().trim());
 553         Uri.Builder uriBuilder = uri.buildUpon();
 554         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_RESPONSE_TYPE, getString(R.string.oauth2_response_type));
 555         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_REDIRECT_URI, getString(R.string.oauth2_redirect_uri));
 556         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_CLIENT_ID, getString(R.string.oauth2_client_id));
 557         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_SCOPE, getString(R.string.oauth2_scope));
 558         //uriBuilder.appendQueryParameter(OAuth2Constants.KEY_STATE, whateverwewant);
 559         uri = uriBuilder.build();
 560         Log_OC.d(TAG, "Starting browser to view " + uri.toString());
 561         Intent i = new Intent(Intent.ACTION_VIEW, uri);
 562         startActivity(i);
 563     }
 564
 565
 566     /**
 567      * Callback method invoked when a RemoteOperation executed by this Activity finishes.
 568      *
 569      * Dispatches the operation flow to the right method.
 570      */
 571     @Override
 572     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 573
 574         if (operation instanceof OwnCloudServerCheckOperation) {
 575             onOcServerCheckFinish((OwnCloudServerCheckOperation) operation, result);
 576
 577         } else if (operation instanceof OAuth2GetAccessToken) {
 578             onGetOAuthAccessTokenFinish((OAuth2GetAccessToken)operation, result);
 579
 580         } else if (operation instanceof ExistenceCheckOperation)  {
 581             onAuthorizationCheckFinish((ExistenceCheckOperation)operation, result);
 582
 583         }
 584     }
 585
 586
 587     /**
 588      * Processes the result of the server check performed when the user finishes the enter of the
 589      * server URL.
 590      *
 591      * @param operation     Server check performed.
 592      * @param result        Result of the check.
 593      */
 594     private void onOcServerCheckFinish(OwnCloudServerCheckOperation operation, RemoteOperationResult result) {
 595         if (operation.equals(mOcServerChkOperation)) {
 596             /// save result state
 597             mServerIsChecked = true;
 598             mServerIsValid = result.isSuccess();
 599             mIsSslConn = (result.getCode() == ResultCode.OK_SSL);
 600             mOcServerChkOperation = null;
 601
 602             /// update status icon and text
 603             if (mServerIsValid) {
 604                 hideRefreshButton();
 605             } else {
 606                 showRefreshButton();
 607             }
 608             updateServerStatusIconAndText(result);
 609             showServerStatus();
 610
 611             /// very special case (TODO: move to a common place for all the remote operations)
 612             if (result.getCode() == ResultCode.SSL_RECOVERABLE_PEER_UNVERIFIED) {
 613                 mLastSslUntrustedServerResult = result;
 614                 showDialog(DIALOG_SSL_VALIDATOR);
 615             }
 616
 617             /// retrieve discovered version and normalize server URL
 618             mDiscoveredVersion = operation.getDiscoveredVersion();
 619             mHostBaseUrl = normalizeUrl(mHostUrlInput.getText().toString());
 620
 621             /// allow or not the user try to access the server
 622             mOkButton.setEnabled(mServerIsValid);
 623
 624         }   // else nothing ; only the last check operation is considered;
 625             // multiple can be triggered if the user amends a URL before a previous check can be triggered
 626     }
 627
 628
 629     private String normalizeUrl(String url) {
 630         if (url != null && url.length() > 0) {
 631             url = url.trim();
 632             if (!url.toLowerCase().startsWith("http://") &&
 633                     !url.toLowerCase().startsWith("https://")) {
 634                 if (mIsSslConn) {
 635                     url = "https://" + url;
 636                 } else {
 637                     url = "http://" + url;
 638                 }
 639
 640             }
 641             if (url.endsWith("/")) {
 642                 url = url.substring(0, url.length() - 1);
 643             }
 644         }
 645         return (url != null ? url : "");
 646     }
 647
 648     /**
 649      * Chooses the right icon and text to show to the user for the received operation result.
 650      *
 651      * @param result    Result of a remote operation performed in this activity
 652      */
 653     private void updateServerStatusIconAndText(RemoteOperationResult result) {
 654         mServerStatusIcon = R.drawable.common_error;    // the most common case in the switch below
 655
 656         switch (result.getCode()) {
 657         case OK_SSL:
 658             mServerStatusIcon = android.R.drawable.ic_secure;
 659             mServerStatusText = R.string.auth_secure_connection;
 660             break;
 661
 662         case OK_NO_SSL:
 663         case OK:
 664             if (mHostUrlInput.getText().toString().trim().toLowerCase().startsWith("http://") ) {
 665                 mServerStatusText = R.string.auth_connection_established;
 666                 mServerStatusIcon = R.drawable.ic_ok;
 667             } else {
 668                 mServerStatusText = R.string.auth_nossl_plain_ok_title;
 669                 mServerStatusIcon = android.R.drawable.ic_partial_secure;
 670             }
 671             break;
 672
 673         case NO_NETWORK_CONNECTION:
 674             mServerStatusIcon = R.drawable.no_network;
 675             mServerStatusText = R.string.auth_no_net_conn_title;
 676             break;
 677
 678         case SSL_RECOVERABLE_PEER_UNVERIFIED:
 679             mServerStatusText = R.string.auth_ssl_unverified_server_title;
 680             break;
 681         case BAD_OC_VERSION:
 682             mServerStatusText = R.string.auth_bad_oc_version_title;
 683             break;
 684         case WRONG_CONNECTION:
 685             mServerStatusText = R.string.auth_wrong_connection_title;
 686             break;
 687         case TIMEOUT:
 688             mServerStatusText = R.string.auth_timeout_title;
 689             break;
 690         case INCORRECT_ADDRESS:
 691             mServerStatusText = R.string.auth_incorrect_address_title;
 692             break;
 693         case SSL_ERROR:
 694             mServerStatusText = R.string.auth_ssl_general_error_title;
 695             break;
 696         case UNAUTHORIZED:
 697             mServerStatusText = R.string.auth_unauthorized;
 698             break;
 699         case HOST_NOT_AVAILABLE:
 700             mServerStatusText = R.string.auth_unknown_host_title;
 701             break;
 702         case INSTANCE_NOT_CONFIGURED:
 703             mServerStatusText = R.string.auth_not_configured_title;
 704             break;
 705         case FILE_NOT_FOUND:
 706             mServerStatusText = R.string.auth_incorrect_path_title;
 707             break;
 708         case OAUTH2_ERROR:
 709             mServerStatusText = R.string.auth_oauth_error;
 710             break;
 711         case OAUTH2_ERROR_ACCESS_DENIED:
 712             mServerStatusText = R.string.auth_oauth_error_access_denied;
 713             break;
 714         case UNHANDLED_HTTP_CODE:
 715         case UNKNOWN_ERROR:
 716             mServerStatusText = R.string.auth_unknown_error_title;
 717             break;
 718         default:
 719             mServerStatusText = 0;
 720             mServerStatusIcon = 0;
 721         }
 722     }
 723
 724
 725     /**
 726      * Chooses the right icon and text to show to the user for the received operation result.
 727      *
 728      * @param result    Result of a remote operation performed in this activity
 729      */
 730     private void updateAuthStatusIconAndText(RemoteOperationResult result) {
 731         mAuthStatusIcon = R.drawable.common_error;    // the most common case in the switch below
 732
 733         switch (result.getCode()) {
 734         case OK_SSL:
 735             mAuthStatusIcon = android.R.drawable.ic_secure;
 736             mAuthStatusText = R.string.auth_secure_connection;
 737             break;
 738
 739         case OK_NO_SSL:
 740         case OK:
 741             if (mHostUrlInput.getText().toString().trim().toLowerCase().startsWith("http://") ) {
 742                 mAuthStatusText = R.string.auth_connection_established;
 743                 mAuthStatusIcon = R.drawable.ic_ok;
 744             } else {
 745                 mAuthStatusText = R.string.auth_nossl_plain_ok_title;
 746                 mAuthStatusIcon = android.R.drawable.ic_partial_secure;
 747             }
 748             break;
 749
 750         case NO_NETWORK_CONNECTION:
 751             mAuthStatusIcon = R.drawable.no_network;
 752             mAuthStatusText = R.string.auth_no_net_conn_title;
 753             break;
 754
 755         case SSL_RECOVERABLE_PEER_UNVERIFIED:
 756             mAuthStatusText = R.string.auth_ssl_unverified_server_title;
 757             break;
 758         case BAD_OC_VERSION:
 759             mAuthStatusText = R.string.auth_bad_oc_version_title;
 760             break;
 761         case WRONG_CONNECTION:
 762             mAuthStatusText = R.string.auth_wrong_connection_title;
 763             break;
 764         case TIMEOUT:
 765             mAuthStatusText = R.string.auth_timeout_title;
 766             break;
 767         case INCORRECT_ADDRESS:
 768             mAuthStatusText = R.string.auth_incorrect_address_title;
 769             break;
 770         case SSL_ERROR:
 771             mAuthStatusText = R.string.auth_ssl_general_error_title;
 772             break;
 773         case UNAUTHORIZED:
 774             mAuthStatusText = R.string.auth_unauthorized;
 775             break;
 776         case HOST_NOT_AVAILABLE:
 777             mAuthStatusText = R.string.auth_unknown_host_title;
 778             break;
 779         case INSTANCE_NOT_CONFIGURED:
 780             mAuthStatusText = R.string.auth_not_configured_title;
 781             break;
 782         case FILE_NOT_FOUND:
 783             mAuthStatusText = R.string.auth_incorrect_path_title;
 784             break;
 785         case OAUTH2_ERROR:
 786             mAuthStatusText = R.string.auth_oauth_error;
 787             break;
 788         case OAUTH2_ERROR_ACCESS_DENIED:
 789             mAuthStatusText = R.string.auth_oauth_error_access_denied;
 790             break;
 791         case UNHANDLED_HTTP_CODE:
 792         case UNKNOWN_ERROR:
 793             mAuthStatusText = R.string.auth_unknown_error_title;
 794             break;
 795         default:
 796             mAuthStatusText = 0;
 797             mAuthStatusIcon = 0;
 798         }
 799     }
 800
 801
 802     /**
 803      * Processes the result of the request for and access token send
 804      * to an OAuth authorization server.
 805      *
 806      * @param operation     Operation performed requesting the access token.
 807      * @param result        Result of the operation.
 808      */
 809     private void onGetOAuthAccessTokenFinish(OAuth2GetAccessToken operation, RemoteOperationResult result) {
 810         try {
 811             dismissDialog(DIALOG_OAUTH2_LOGIN_PROGRESS);
 812         } catch (IllegalArgumentException e) {
 813             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 814         }
 815
 816         String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, true);
 817         if (result.isSuccess() && webdav_path != null) {
 818             /// be gentle with the user
 819             showDialog(DIALOG_LOGIN_PROGRESS);
 820
 821             /// time to test the retrieved access token on the ownCloud server
 822             mOAuthAccessToken = ((OAuth2GetAccessToken)operation).getResultTokenMap().get(OAuth2Constants.KEY_ACCESS_TOKEN);
 823             Log_OC.d(TAG, "Got ACCESS TOKEN: " + mOAuthAccessToken);
 824             mAuthCheckOperation = new ExistenceCheckOperation("", this, false);
 825             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this);
 826             client.setBearerCredentials(mOAuthAccessToken);
 827             mAuthCheckOperation.execute(client, this, mHandler);
 828
 829         } else {
 830             updateAuthStatusIconAndText(result);
 831             showAuthStatus();
 832             Log_OC.d(TAG, "Access failed: " + result.getLogMessage());
 833         }
 834     }
 835
 836
 837     /**
 838      * Processes the result of the access check performed to try the user credentials.
 839      *
 840      * Creates a new account through the AccountManager.
 841      *
 842      * @param operation     Access check performed.
 843      * @param result        Result of the operation.
 844      */
 845     private void onAuthorizationCheckFinish(ExistenceCheckOperation operation, RemoteOperationResult result) {
 846         try {
 847             dismissDialog(DIALOG_LOGIN_PROGRESS);
 848         } catch (IllegalArgumentException e) {
 849             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 850         }
 851
 852         if (result.isSuccess()) {
 853             Log_OC.d(TAG, "Successful access - time to save the account");
 854
 855             if (mAction == ACTION_CREATE) {
 856                 createAccount();
 857
 858             } else {
 859                 updateToken();
 860             }
 861
 862             finish();
 863
 864         } else {
 865             updateAuthStatusIconAndText(result);
 866             showAuthStatus();
 867             Log_OC.d(TAG, "Access failed: " + result.getLogMessage());
 868         }
 869     }
 870
 871
 872     /**
 873      * Sets the proper response to get that the Account Authenticator that started this activity saves
 874      * a new authorization token for mAccount.
 875      */
 876     private void updateToken() {
 877         Bundle response = new Bundle();
 878         response.putString(AccountManager.KEY_ACCOUNT_NAME, mAccount.name);
 879         response.putString(AccountManager.KEY_ACCOUNT_TYPE, mAccount.type);
 880         boolean isOAuth = mOAuth2Check.isChecked();
 881         if (isOAuth) {
 882             response.putString(AccountManager.KEY_AUTHTOKEN, mOAuthAccessToken);
 883             // the next line is necessary; by now, notifications are calling directly to the AuthenticatorActivity to update, without AccountManager intervention
 884             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
 885         } else {
 886             response.putString(AccountManager.KEY_AUTHTOKEN, mPasswordInput.getText().toString());
 887             mAccountMgr.setPassword(mAccount, mPasswordInput.getText().toString());
 888         }
 889         setAccountAuthenticatorResult(response);
 890     }
 891
 892
 893     /**
 894      * Creates a new account through the Account Authenticator that started this activity.
 895      *
 896      * This makes the account permanent.
 897      *
 898      * TODO Decide how to name the OAuth accounts
 899      */
 900     private void createAccount() {
 901         /// create and save new ownCloud account
 902         boolean isOAuth = mOAuth2Check.isChecked();
 903
 904         Uri uri = Uri.parse(mHostBaseUrl);
 905         String username = mUsernameInput.getText().toString().trim();
 906         if (isOAuth) {
 907             username = "OAuth_user" + (new java.util.Random(System.currentTimeMillis())).nextLong();
 908         }
 909         String accountName = username + "@" + uri.getHost();
 910         if (uri.getPort() >= 0) {
 911             accountName += ":" + uri.getPort();
 912         }
 913         mAccount = new Account(accountName, AccountAuthenticator.ACCOUNT_TYPE);
 914         if (isOAuth) {
 915             mAccountMgr.addAccountExplicitly(mAccount, "", null);  // with our implementation, the password is never input in the app
 916         } else {
 917             mAccountMgr.addAccountExplicitly(mAccount, mPasswordInput.getText().toString(), null);
 918         }
 919
 920         /// add the new account as default in preferences, if there is none already
 921         Account defaultAccount = AccountUtils.getCurrentOwnCloudAccount(this);
 922         if (defaultAccount == null) {
 923             SharedPreferences.Editor editor = PreferenceManager
 924                     .getDefaultSharedPreferences(this).edit();
 925             editor.putString("select_oc_account", accountName);
 926             editor.commit();
 927         }
 928
 929         /// prepare result to return to the Authenticator
 930         //  TODO check again what the Authenticator makes with it; probably has the same effect as addAccountExplicitly, but it's not well done
 931         final Intent intent = new Intent();
 932         intent.putExtra(AccountManager.KEY_ACCOUNT_TYPE,    AccountAuthenticator.ACCOUNT_TYPE);
 933         intent.putExtra(AccountManager.KEY_ACCOUNT_NAME,    mAccount.name);
 934         if (!isOAuth)
 935             intent.putExtra(AccountManager.KEY_AUTHTOKEN,   AccountAuthenticator.ACCOUNT_TYPE); // TODO check this; not sure it's right; maybe
 936         intent.putExtra(AccountManager.KEY_USERDATA,        username);
 937         if (isOAuth) {
 938             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
 939         }
 940         /// add user data to the new account; TODO probably can be done in the last parameter addAccountExplicitly, or in KEY_USERDATA
 941         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_VERSION,    mDiscoveredVersion.toString());
 942         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_BASE_URL,   mHostBaseUrl);
 943         if (isOAuth)
 944             mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_SUPPORTS_OAUTH2, "TRUE");  // TODO this flag should be unnecessary
 945
 946         setAccountAuthenticatorResult(intent.getExtras());
 947         setResult(RESULT_OK, intent);
 948
 949         /// immediately request for the synchronization of the new account
 950         Bundle bundle = new Bundle();
 951         bundle.putBoolean(ContentResolver.SYNC_EXTRAS_MANUAL, true);
 952         ContentResolver.requestSync(mAccount, AccountAuthenticator.AUTHORITY, bundle);
 953     }
 954
 955
 956     /**
 957      * {@inheritDoc}
 958      *
 959      * Necessary to update the contents of the SSL Dialog
 960      *
 961      * TODO move to some common place for all possible untrusted SSL failures
 962      */
 963     @Override
 964     protected void onPrepareDialog(int id, Dialog dialog, Bundle args) {
 965         switch (id) {
 966         case DIALOG_LOGIN_PROGRESS:
 967         case DIALOG_CERT_NOT_SAVED:
 968         case DIALOG_OAUTH2_LOGIN_PROGRESS:
 969             break;
 970         case DIALOG_SSL_VALIDATOR: {
 971             ((SslValidatorDialog)dialog).updateResult(mLastSslUntrustedServerResult);
 972             break;
 973         }
 974         default:
 975             Log_OC.e(TAG, "Incorrect dialog called with id = " + id);
 976         }
 977     }
 978
 979
 980     /**
 981      * {@inheritDoc}
 982      */
 983     @Override
 984     protected Dialog onCreateDialog(int id) {
 985         Dialog dialog = null;
 986         switch (id) {
 987         case DIALOG_LOGIN_PROGRESS: {
 988             /// simple progress dialog
 989             ProgressDialog working_dialog = new ProgressDialog(this);
 990             working_dialog.setMessage(getResources().getString(R.string.auth_trying_to_login));
 991             working_dialog.setIndeterminate(true);
 992             working_dialog.setCancelable(true);
 993             working_dialog
 994                     .setOnCancelListener(new DialogInterface.OnCancelListener() {
 995                         @Override
 996                         public void onCancel(DialogInterface dialog) {
 997                             /// TODO study if this is enough
 998                             Log_OC.i(TAG, "Login canceled");
 999                             if (mOperationThread != null) {
1000                                 mOperationThread.interrupt();
1001                                 finish();
1002                             }
1003                         }
1004                     });
1005             dialog = working_dialog;
1006             break;
1007         }
1008         case DIALOG_OAUTH2_LOGIN_PROGRESS: {
1009             ProgressDialog working_dialog = new ProgressDialog(this);
1010             working_dialog.setMessage(String.format("Getting authorization"));
1011             working_dialog.setIndeterminate(true);
1012             working_dialog.setCancelable(true);
1013             working_dialog
1014             .setOnCancelListener(new DialogInterface.OnCancelListener() {
1015                 @Override
1016                 public void onCancel(DialogInterface dialog) {
1017                     Log_OC.i(TAG, "Login canceled");
1018                     finish();
1019                 }
1020             });
1021             dialog = working_dialog;
1022             break;
1023         }
1024         case DIALOG_SSL_VALIDATOR: {
1025             /// TODO start to use new dialog interface, at least for this (it is a FragmentDialog already)
1026             dialog = SslValidatorDialog.newInstance(this, mLastSslUntrustedServerResult, this);
1027             break;
1028         }
1029         case DIALOG_CERT_NOT_SAVED: {
1030             AlertDialog.Builder builder = new AlertDialog.Builder(this);
1031             builder.setMessage(getResources().getString(R.string.ssl_validator_not_saved));
1032             builder.setCancelable(false);
1033             builder.setPositiveButton(R.string.common_ok, new DialogInterface.OnClickListener() {
1034                     @Override
1035                     public void onClick(DialogInterface dialog, int which) {
1036                         dialog.dismiss();
1037                     };
1038                 });
1039             dialog = builder.create();
1040             break;
1041         }
1042         default:
1043             Log_OC.e(TAG, "Incorrect dialog called with id = " + id);
1044         }
1045         return dialog;
1046     }
1047
1048
1049     /**
1050      * Starts and activity to open the 'new account' page in the ownCloud web site
1051      *
1052      * @param view      'Account register' button
1053      */
1054     public void onRegisterClick(View view) {
1055         Intent register = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.url_account_register)));
1056         setResult(RESULT_CANCELED);
1057         startActivity(register);
1058     }
1059
1060
1061     /**
1062      * Updates the content and visibility state of the icon and text associated
1063      * to the last check on the ownCloud server.
1064      */
1065     private void showServerStatus() {
1066         TextView tv = (TextView) findViewById(R.id.server_status_text);
1067
1068         if (mServerStatusIcon == 0 && mServerStatusText == 0) {
1069             tv.setVisibility(View.INVISIBLE);
1070
1071         } else {
1072             tv.setText(mServerStatusText);
1073             tv.setCompoundDrawablesWithIntrinsicBounds(mServerStatusIcon, 0, 0, 0);
1074             tv.setVisibility(View.VISIBLE);
1075         }
1076
1077     }
1078
1079
1080     /**
1081      * Updates the content and visibility state of the icon and text associated
1082      * to the interactions with the OAuth authorization server.
1083      */
1084     private void showAuthStatus() {
1085         if (mAuthStatusIcon == 0 && mAuthStatusText == 0) {
1086             mAuthStatusLayout.setVisibility(View.INVISIBLE);
1087
1088         } else {
1089             mAuthStatusLayout.setText(mAuthStatusText);
1090             mAuthStatusLayout.setCompoundDrawablesWithIntrinsicBounds(mAuthStatusIcon, 0, 0, 0);
1091             mAuthStatusLayout.setVisibility(View.VISIBLE);
1092         }
1093     }
1094
1095
1096     private void showRefreshButton() {
1097         mHostUrlInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_action_refresh_black, 0);
1098     }
1099
1100     private void hideRefreshButton() {
1101         mHostUrlInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0);
1102     }
1103
1104     /**
1105      * Called when the refresh button in the input field for ownCloud host is clicked.
1106      *
1107      * Performs a new check on the URL in the input field.
1108      *
1109      * @param view      Refresh 'button'
1110      */
1111     public void onRefreshClick(View view) {
1112         checkOcServer();
1113     }
1114
1115
1116     /**
1117      * Called when the eye icon in the password field is clicked.
1118      *
1119      * Toggles the visibility of the password in the field.
1120      *
1121      * @param view      'View password' 'button'
1122      */
1123     public void onViewPasswordClick(View view) {
1124         int selectionStart = mPasswordInput.getSelectionStart();
1125         int selectionEnd = mPasswordInput.getSelectionEnd();
1126         int input_type = mPasswordInput.getInputType();
1127         if ((input_type & InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD) == InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD) {
1128             input_type = InputType.TYPE_CLASS_TEXT
1129                     | InputType.TYPE_TEXT_VARIATION_PASSWORD;
1130         } else {
1131             input_type = InputType.TYPE_CLASS_TEXT
1132                     | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD;
1133         }
1134         mPasswordInput.setInputType(input_type);
1135         mPasswordInput.setSelection(selectionStart, selectionEnd);
1136     }
1137
1138
1139     /**
1140      * Called when the checkbox for OAuth authorization is clicked.
1141      *
1142      * Hides or shows the input fields for user & password.
1143      *
1144      * @param view      'View password' 'button'
1145      */
1146     public void onCheckClick(View view) {
1147         CheckBox oAuth2Check = (CheckBox)view;
1148         changeViewByOAuth2Check(oAuth2Check.isChecked());
1149
1150     }
1151
1152     /**
1153      * Changes the visibility of input elements depending upon the kind of authorization
1154      * chosen by the user: basic or OAuth
1155      *
1156      * @param checked       'True' when OAuth is selected.
1157      */
1158     public void changeViewByOAuth2Check(Boolean checked) {
1159
1160         if (checked) {
1161             mOAuthAuthEndpointText.setVisibility(View.VISIBLE);
1162             mOAuthTokenEndpointText.setVisibility(View.VISIBLE);
1163             mUsernameInput.setVisibility(View.GONE);
1164             mPasswordInput.setVisibility(View.GONE);
1165             mViewPasswordButton.setVisibility(View.GONE);
1166         } else {
1167             mOAuthAuthEndpointText.setVisibility(View.GONE);
1168             mOAuthTokenEndpointText.setVisibility(View.GONE);
1169             mUsernameInput.setVisibility(View.VISIBLE);
1170             mPasswordInput.setVisibility(View.VISIBLE);
1171             mViewPasswordButton.setVisibility(View.INVISIBLE);
1172         }
1173
1174     }
1175
1176     /**
1177      * Called from SslValidatorDialog when a new server certificate was correctly saved.
1178      */
1179     public void onSavedCertificate() {
1180         mOperationThread = mOcServerChkOperation.retry(this, mHandler);
1181     }
1182
1183     /**
1184      * Called from SslValidatorDialog when a new server certificate could not be saved
1185      * when the user requested it.
1186      */
1187     @Override
1188     public void onFailedSavingCertificate() {
1189         showDialog(DIALOG_CERT_NOT_SAVED);
1190     }
1191
1192
1193     /**
1194      *  Called when the 'action' button in an IME is pressed ('enter' in software keyboard).
1195      *
1196      *  Used to trigger the authorization check when the user presses 'enter' after writing the password.
1197      */
1198     @Override
1199     public boolean onEditorAction(TextView inputField, int actionId, KeyEvent event) {
1200         if (inputField != null && inputField.equals(mPasswordInput) &&
1201                 actionId == EditorInfo.IME_ACTION_DONE) {
1202             if (mOkButton.isEnabled()) {
1203                 mOkButton.performClick();
1204             }
1205         }
1206         return false;   // always return false to grant that the software keyboard is hidden anyway
1207     }
1208
1209
1210     private abstract static class RightDrawableOnTouchListener implements OnTouchListener  {
1211
1212         private int fuzz = 10;
1213
1214         /**
1215          * {@inheritDoc}
1216          */
1217         @Override
1218         public boolean onTouch(View view, MotionEvent event) {
1219             if (event.getAction() == MotionEvent.ACTION_DOWN) {
1220                 Drawable rightDrawable = null;
1221                 if (view instanceof TextView) {
1222                     Drawable[] drawables = ((TextView)view).getCompoundDrawables();
1223                     if (drawables.length > 2) {
1224                         rightDrawable = drawables[2];
1225                     }
1226                 }
1227                 if (rightDrawable != null) {
1228                     final int x = (int) event.getX();
1229                     final int y = (int) event.getY();
1230                     final Rect bounds = rightDrawable.getBounds();
1231                     if (x >= (view.getRight() - bounds.width() - fuzz) && x <= (view.getRight() - view.getPaddingRight() + fuzz)
1232                         && y >= (view.getPaddingTop() - fuzz) && y <= (view.getHeight() - view.getPaddingBottom()) + fuzz) {
1233
1234                         return onDrawableTouch(event);
1235                     }
1236                 }
1237             }
1238             return false;
1239         }
1240
1241         public abstract boolean onDrawableTouch(final MotionEvent event);
1242     }
1243
1244 }