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     public static final String WEBDAV_PATH= "/remote.php/webdav";
 114
 115     private String mHostBaseUrl;
 116     private OwnCloudVersion mDiscoveredVersion;
 117
 118     private int mServerStatusText, mServerStatusIcon;
 119     private boolean mServerIsChecked, mServerIsValid, mIsSslConn;
 120     private int mAuthStatusText, mAuthStatusIcon;
 121
 122     private final Handler mHandler = new Handler();
 123     private Thread mOperationThread;
 124     private OwnCloudServerCheckOperation mOcServerChkOperation;
 125     private ExistenceCheckOperation mAuthCheckOperation;
 126     private RemoteOperationResult mLastSslUntrustedServerResult;
 127
 128     private Uri mNewCapturedUriFromOAuth2Redirection;
 129
 130     private AccountManager mAccountMgr;
 131     private boolean mJustCreated;
 132     private byte mAction;
 133     private Account mAccount;
 134
 135     private ImageView mViewPasswordButton;
 136     private EditText mHostUrlInput;
 137     private EditText mUsernameInput;
 138     private EditText mPasswordInput;
 139     private CheckBox mOAuth2Check;
 140     private String mOAuthAccessToken;
 141     private View mOkButton;
 142     private TextView mAuthStatusLayout;
 143
 144     private TextView mOAuthAuthEndpointText;
 145     private TextView mOAuthTokenEndpointText;
 146
 147
 148     /**
 149      * {@inheritDoc}
 150      *
 151      * IMPORTANT ENTRY POINT 1: activity is shown to the user
 152      */
 153     @Override
 154     protected void onCreate(Bundle savedInstanceState) {
 155         super.onCreate(savedInstanceState);
 156         getWindow().requestFeature(Window.FEATURE_NO_TITLE);
 157
 158         /// set view and get references to view elements
 159         setContentView(R.layout.account_setup);
 160         mViewPasswordButton = (ImageView) findViewById(R.id.viewPasswordButton);
 161         mHostUrlInput = (EditText) findViewById(R.id.hostUrlInput);
 162         mUsernameInput = (EditText) findViewById(R.id.account_username);
 163         mPasswordInput = (EditText) findViewById(R.id.account_password);
 164         mOAuthAuthEndpointText = (TextView)findViewById(R.id.oAuthEntryPoint_1);
 165         mOAuthTokenEndpointText = (TextView)findViewById(R.id.oAuthEntryPoint_2);
 166         mOAuth2Check = (CheckBox) findViewById(R.id.oauth_onOff_check);
 167         mOkButton = findViewById(R.id.buttonOK);
 168         mAuthStatusLayout = (TextView) findViewById(R.id.auth_status_text);
 169
 170         /// complete label for 'register account' button
 171         Button b = (Button) findViewById(R.id.account_register);
 172         if (b != null) {
 173             b.setText(String.format(getString(R.string.auth_register), getString(R.string.app_name)));
 174         }
 175
 176         /// initialization
 177         mAccountMgr = AccountManager.get(this);
 178         mNewCapturedUriFromOAuth2Redirection = null;
 179         mAction = getIntent().getByteExtra(EXTRA_ACTION, ACTION_CREATE);
 180         mAccount = null;
 181         mHostBaseUrl = "";
 182
 183         if (savedInstanceState == null) {
 184             /// connection state and info
 185             mServerStatusText = mServerStatusIcon = 0;
 186             mServerIsValid = false;
 187             mServerIsChecked = false;
 188             mIsSslConn = false;
 189             mAuthStatusText = mAuthStatusIcon = 0;
 190
 191             /// retrieve extras from intent
 192             String tokenType = getIntent().getExtras().getString(AccountAuthenticator.KEY_AUTH_TOKEN_TYPE);
 193             boolean oAuthRequired = AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN.equals(tokenType) || OAUTH_MODE_ON.equals(getString(R.string.oauth2_mode));
 194
 195             mAccount = getIntent().getExtras().getParcelable(EXTRA_ACCOUNT);
 196             if (mAccount != null) {
 197                 String ocVersion = mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_OC_VERSION);
 198                 if (ocVersion != null) {
 199                     mDiscoveredVersion = new OwnCloudVersion(ocVersion);
 200                 }
 201                 mHostBaseUrl = normalizeUrl(mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_OC_BASE_URL));
 202                 mHostUrlInput.setText(mHostBaseUrl);
 203                 String userName = mAccount.name.substring(0, mAccount.name.lastIndexOf('@'));
 204                 mUsernameInput.setText(userName);
 205                 oAuthRequired = (mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_SUPPORTS_OAUTH2) != null);
 206             }
 207             mOAuth2Check.setChecked(oAuthRequired);
 208             changeViewByOAuth2Check(oAuthRequired);
 209
 210
 211         } else {
 212             /// connection state and info
 213             mServerIsValid = savedInstanceState.getBoolean(KEY_SERVER_VALID);
 214             mServerIsChecked = savedInstanceState.getBoolean(KEY_SERVER_CHECKED);
 215             mServerStatusText = savedInstanceState.getInt(KEY_SERVER_STATUS_TEXT);
 216             mServerStatusIcon = savedInstanceState.getInt(KEY_SERVER_STATUS_ICON);
 217             mIsSslConn = savedInstanceState.getBoolean(KEY_IS_SSL_CONN);
 218             mAuthStatusText = savedInstanceState.getInt(KEY_AUTH_STATUS_TEXT);
 219             mAuthStatusIcon = savedInstanceState.getInt(KEY_AUTH_STATUS_ICON);
 220
 221             /// server data
 222             String ocVersion = savedInstanceState.getString(KEY_OC_VERSION);
 223             if (ocVersion != null) {
 224                 mDiscoveredVersion = new OwnCloudVersion(ocVersion);
 225             }
 226             mHostBaseUrl = savedInstanceState.getString(KEY_HOST_URL_TEXT);
 227
 228             // account data, if updating
 229             mAccount = savedInstanceState.getParcelable(KEY_ACCOUNT);
 230
 231             // check if server check was interrupted by a configuration change
 232             if (savedInstanceState.getBoolean(KEY_SERVER_CHECK_IN_PROGRESS, false)) {
 233                 checkOcServer();
 234             }
 235
 236         }
 237
 238         showServerStatus();
 239         showAuthStatus();
 240         if (mServerIsChecked && !mServerIsValid) showRefreshButton();
 241         mOkButton.setEnabled(mServerIsValid); // state not automatically recovered in configuration changes
 242
 243         if (!OAUTH_MODE_OPTIONAL.equals(getString(R.string.oauth2_mode))) {
 244             mOAuth2Check.setVisibility(View.GONE);
 245         }
 246
 247         if (mAction == ACTION_UPDATE_TOKEN) {
 248             /// lock things that should not change
 249             mHostUrlInput.setEnabled(false);
 250             mUsernameInput.setEnabled(false);
 251             mOAuth2Check.setVisibility(View.GONE);
 252             if (!mServerIsValid && mOcServerChkOperation == null) {
 253                 checkOcServer();
 254             }
 255         }
 256
 257         mPasswordInput.setText("");     // clean password to avoid social hacking (disadvantage: password in removed if the device is turned aside)
 258         mJustCreated = true;
 259
 260         /// bind view elements to listeners
 261         mHostUrlInput.setOnFocusChangeListener(this);
 262         mHostUrlInput.setOnTouchListener(new RightDrawableOnTouchListener() {
 263             @Override
 264             public boolean onDrawableTouch(final MotionEvent event) {
 265                 AuthenticatorActivity.this.onRefreshClick(mHostUrlInput);
 266                 return true;
 267             }
 268         });
 269         mHostUrlInput.addTextChangedListener(new TextWatcher() {
 270
 271             @Override
 272             public void afterTextChanged(Editable s) {
 273                 if (!mHostBaseUrl.equals(normalizeUrl(mHostUrlInput.getText().toString()))) {
 274                     mOkButton.setEnabled(false);
 275                 }
 276             }
 277
 278             @Override
 279             public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
 280
 281             @Override
 282             public void onTextChanged(CharSequence s, int start, int before, int count) {}
 283
 284         });
 285         mPasswordInput.setOnFocusChangeListener(this);
 286         mPasswordInput.setImeOptions(EditorInfo.IME_ACTION_DONE);
 287         mPasswordInput.setOnEditorActionListener(this);
 288     }
 289
 290     /**
 291      * Saves relevant state before {@link #onPause()}
 292      *
 293      * Do NOT save {@link #mNewCapturedUriFromOAuth2Redirection}; it keeps a temporal flag, intended to defer the
 294      * processing of the redirection caught in {@link #onNewIntent(Intent)} until {@link #onResume()}
 295      *
 296      * See {@link #loadSavedInstanceState(Bundle)}
 297      */
 298     @Override
 299     protected void onSaveInstanceState(Bundle outState) {
 300         super.onSaveInstanceState(outState);
 301
 302         /// connection state and info
 303         outState.putInt(KEY_SERVER_STATUS_TEXT, mServerStatusText);
 304         outState.putInt(KEY_SERVER_STATUS_ICON, mServerStatusIcon);
 305         outState.putBoolean(KEY_SERVER_VALID, mServerIsValid);
 306         outState.putBoolean(KEY_SERVER_CHECKED, mServerIsChecked);
 307         outState.putBoolean(KEY_SERVER_CHECK_IN_PROGRESS, (!mServerIsValid && mOcServerChkOperation != null));
 308         outState.putBoolean(KEY_IS_SSL_CONN, mIsSslConn);
 309         outState.putInt(KEY_AUTH_STATUS_ICON, mAuthStatusIcon);
 310         outState.putInt(KEY_AUTH_STATUS_TEXT, mAuthStatusText);
 311
 312         /// server data
 313         if (mDiscoveredVersion != null) {
 314             outState.putString(KEY_OC_VERSION, mDiscoveredVersion.toString());
 315         }
 316         outState.putString(KEY_HOST_URL_TEXT, mHostBaseUrl);
 317
 318         /// account data, if updating
 319         if (mAccount != null) {
 320             outState.putParcelable(KEY_ACCOUNT, mAccount);
 321         }
 322
 323     }
 324
 325
 326     /**
 327      * The redirection triggered by the OAuth authentication server as response to the GET AUTHORIZATION request
 328      * is caught here.
 329      *
 330      * To make this possible, this activity needs to be qualified with android:launchMode = "singleTask" in the
 331      * AndroidManifest.xml file.
 332      */
 333     @Override
 334     protected void onNewIntent (Intent intent) {
 335         Log_OC.d(TAG, "onNewIntent()");
 336         Uri data = intent.getData();
 337         if (data != null && data.toString().startsWith(getString(R.string.oauth2_redirect_uri))) {
 338             mNewCapturedUriFromOAuth2Redirection = data;
 339         }
 340     }
 341
 342
 343     /**
 344      * The redirection triggered by the OAuth authentication server as response to the GET AUTHORIZATION, and
 345      * deferred in {@link #onNewIntent(Intent)}, is processed here.
 346      */
 347     @Override
 348     protected void onResume() {
 349         super.onResume();
 350         // the state of mOAuth2Check is automatically recovered between configuration changes, but not before onCreate() finishes; so keep the next lines here
 351         changeViewByOAuth2Check(mOAuth2Check.isChecked());
 352         if (mAction == ACTION_UPDATE_TOKEN && mJustCreated) {
 353             if (mOAuth2Check.isChecked())
 354                 Toast.makeText(this, R.string.auth_expired_oauth_token_toast, Toast.LENGTH_LONG).show();
 355             else
 356                 Toast.makeText(this, R.string.auth_expired_basic_auth_toast, Toast.LENGTH_LONG).show();
 357         }
 358
 359         if (mNewCapturedUriFromOAuth2Redirection != null) {
 360             getOAuth2AccessTokenFromCapturedRedirection();
 361         }
 362
 363         mJustCreated = false;
 364     }
 365
 366
 367     /**
 368      * Parses the redirection with the response to the GET AUTHORIZATION request to the
 369      * oAuth server and requests for the access token (GET ACCESS TOKEN)
 370      */
 371     private void getOAuth2AccessTokenFromCapturedRedirection() {
 372         /// Parse data from OAuth redirection
 373         String queryParameters = mNewCapturedUriFromOAuth2Redirection.getQuery();
 374         mNewCapturedUriFromOAuth2Redirection = null;
 375
 376         /// Showing the dialog with instructions for the user.
 377         showDialog(DIALOG_OAUTH2_LOGIN_PROGRESS);
 378
 379         /// GET ACCESS TOKEN to the oAuth server
 380         RemoteOperation operation = new OAuth2GetAccessToken(   getString(R.string.oauth2_client_id),
 381                 getString(R.string.oauth2_redirect_uri),
 382                 getString(R.string.oauth2_grant_type),
 383                 queryParameters);
 384         //WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(getString(R.string.oauth2_url_endpoint_access)), getApplicationContext());
 385         WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mOAuthTokenEndpointText.getText().toString().trim()), getApplicationContext());
 386         operation.execute(client, this, mHandler);
 387     }
 388
 389
 390
 391     /**
 392      * Handles the change of focus on the text inputs for the server URL and the password
 393      */
 394     public void onFocusChange(View view, boolean hasFocus) {
 395         if (view.getId() == R.id.hostUrlInput) {
 396             if (!hasFocus) {
 397                 onUrlInputFocusLost((TextView) view);
 398             }
 399             else {
 400                 hideRefreshButton();
 401             }
 402
 403         } else if (view.getId() == R.id.account_password) {
 404             onPasswordFocusChanged((TextView) view, hasFocus);
 405         }
 406     }
 407
 408
 409     /**
 410      * Handles changes in focus on the text input for the server URL.
 411      *
 412      * IMPORTANT ENTRY POINT 2: When (!hasFocus), user wrote the server URL and changed to
 413      * other field. The operation to check the existence of the server in the entered URL is
 414      * started.
 415      *
 416      * When hasFocus:    user 'comes back' to write again the server URL.
 417      *
 418      * @param hostInput     TextView with the URL input field receiving the change of focus.
 419      */
 420     private void onUrlInputFocusLost(TextView hostInput) {
 421         if (!mHostBaseUrl.equals(normalizeUrl(mHostUrlInput.getText().toString()))) {
 422             checkOcServer();
 423         } else {
 424             mOkButton.setEnabled(mServerIsValid);
 425         }
 426     }
 427
 428
 429     private void checkOcServer() {
 430         String uri = trimUrlWebdav(mHostUrlInput.getText().toString().trim());
 431         mServerIsValid = false;
 432         mServerIsChecked = false;
 433         mOkButton.setEnabled(false);
 434         mDiscoveredVersion = null;
 435         hideRefreshButton();
 436         if (uri.length() != 0) {
 437             mServerStatusText = R.string.auth_testing_connection;
 438             mServerStatusIcon = R.drawable.progress_small;
 439             showServerStatus();
 440             mOcServerChkOperation = new  OwnCloudServerCheckOperation(uri, this);
 441             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(uri), this);
 442             mOperationThread = mOcServerChkOperation.execute(client, this, mHandler);
 443         } else {
 444             mServerStatusText = 0;
 445             mServerStatusIcon = 0;
 446             showServerStatus();
 447         }
 448     }
 449
 450
 451     /**
 452      * Handles changes in focus on the text input for the password (basic authorization).
 453      *
 454      * When (hasFocus), the button to toggle password visibility is shown.
 455      *
 456      * When (!hasFocus), the button is made invisible and the password is hidden.
 457      *
 458      * @param passwordInput    TextView with the password input field receiving the change of focus.
 459      * @param hasFocus          'True' if focus is received, 'false' if is lost
 460      */
 461     private void onPasswordFocusChanged(TextView passwordInput, boolean hasFocus) {
 462         if (hasFocus) {
 463             mViewPasswordButton.setVisibility(View.VISIBLE);
 464         } else {
 465             int input_type = InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD;
 466             passwordInput.setInputType(input_type);
 467             mViewPasswordButton.setVisibility(View.INVISIBLE);
 468         }
 469     }
 470
 471
 472
 473     /**
 474      * Cancels the authenticator activity
 475      *
 476      * IMPORTANT ENTRY POINT 3: Never underestimate the importance of cancellation
 477      *
 478      * This method is bound in the layout/acceoun_setup.xml resource file.
 479      *
 480      * @param view      Cancel button
 481      */
 482     public void onCancelClick(View view) {
 483         setResult(RESULT_CANCELED);     // TODO review how is this related to AccountAuthenticator (debugging)
 484         finish();
 485     }
 486
 487
 488
 489     /**
 490      * Checks the credentials of the user in the root of the ownCloud server
 491      * before creating a new local account.
 492      *
 493      * For basic authorization, a check of existence of the root folder is
 494      * performed.
 495      *
 496      * For OAuth, starts the flow to get an access token; the credentials test
 497      * is postponed until it is available.
 498      *
 499      * IMPORTANT ENTRY POINT 4
 500      *
 501      * @param view      OK button
 502      */
 503     public void onOkClick(View view) {
 504         // this check should be unnecessary
 505         if (mDiscoveredVersion == null || !mDiscoveredVersion.isVersionValid()  || mHostBaseUrl == null || mHostBaseUrl.length() == 0) {
 506             mServerStatusIcon = R.drawable.common_error;
 507             mServerStatusText = R.string.auth_wtf_reenter_URL;
 508             showServerStatus();
 509             mOkButton.setEnabled(false);
 510             Log_OC.wtf(TAG,  "The user was allowed to click 'connect' to an unchecked server!!");
 511             return;
 512         }
 513
 514         if (mOAuth2Check.isChecked()) {
 515             startOauthorization();
 516
 517         } else {
 518             checkBasicAuthorization();
 519         }
 520     }
 521
 522
 523     /**
 524      * Tests the credentials entered by the user performing a check of existence on
 525      * the root folder of the ownCloud server.
 526      */
 527     private void checkBasicAuthorization() {
 528         /// get the path to the root folder through WebDAV from the version server
 529         String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, false);
 530
 531         /// get basic credentials entered by user
 532         String username = mUsernameInput.getText().toString();
 533         String password = mPasswordInput.getText().toString();
 534
 535         /// be gentle with the user
 536         showDialog(DIALOG_LOGIN_PROGRESS);
 537
 538         /// test credentials accessing the root folder
 539         mAuthCheckOperation = new  ExistenceCheckOperation("", this, false);
 540         WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this);
 541         client.setBasicCredentials(username, password);
 542         mOperationThread = mAuthCheckOperation.execute(client, this, mHandler);
 543     }
 544
 545
 546     /**
 547      * Starts the OAuth 'grant type' flow to get an access token, with
 548      * a GET AUTHORIZATION request to the BUILT-IN authorization server.
 549      */
 550     private void startOauthorization() {
 551         // be gentle with the user
 552         mAuthStatusIcon = R.drawable.progress_small;
 553         mAuthStatusText = R.string.oauth_login_connection;
 554         showAuthStatus();
 555
 556         // GET AUTHORIZATION request
 557         //Uri uri = Uri.parse(getString(R.string.oauth2_url_endpoint_auth));
 558         Uri uri = Uri.parse(mOAuthAuthEndpointText.getText().toString().trim());
 559         Uri.Builder uriBuilder = uri.buildUpon();
 560         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_RESPONSE_TYPE, getString(R.string.oauth2_response_type));
 561         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_REDIRECT_URI, getString(R.string.oauth2_redirect_uri));
 562         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_CLIENT_ID, getString(R.string.oauth2_client_id));
 563         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_SCOPE, getString(R.string.oauth2_scope));
 564         //uriBuilder.appendQueryParameter(OAuth2Constants.KEY_STATE, whateverwewant);
 565         uri = uriBuilder.build();
 566         Log_OC.d(TAG, "Starting browser to view " + uri.toString());
 567         Intent i = new Intent(Intent.ACTION_VIEW, uri);
 568         startActivity(i);
 569     }
 570
 571
 572     /**
 573      * Callback method invoked when a RemoteOperation executed by this Activity finishes.
 574      *
 575      * Dispatches the operation flow to the right method.
 576      */
 577     @Override
 578     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 579
 580         if (operation instanceof OwnCloudServerCheckOperation) {
 581             onOcServerCheckFinish((OwnCloudServerCheckOperation) operation, result);
 582
 583         } else if (operation instanceof OAuth2GetAccessToken) {
 584             onGetOAuthAccessTokenFinish((OAuth2GetAccessToken)operation, result);
 585
 586         } else if (operation instanceof ExistenceCheckOperation)  {
 587             onAuthorizationCheckFinish((ExistenceCheckOperation)operation, result);
 588
 589         }
 590     }
 591
 592
 593     /**
 594      * Processes the result of the server check performed when the user finishes the enter of the
 595      * server URL.
 596      *
 597      * @param operation     Server check performed.
 598      * @param result        Result of the check.
 599      */
 600     private void onOcServerCheckFinish(OwnCloudServerCheckOperation operation, RemoteOperationResult result) {
 601         if (operation.equals(mOcServerChkOperation)) {
 602             /// save result state
 603             mServerIsChecked = true;
 604             mServerIsValid = result.isSuccess();
 605             mIsSslConn = (result.getCode() == ResultCode.OK_SSL);
 606             mOcServerChkOperation = null;
 607
 608             /// update status icon and text
 609             if (mServerIsValid) {
 610                 hideRefreshButton();
 611             } else {
 612                 showRefreshButton();
 613             }
 614             updateServerStatusIconAndText(result);
 615             showServerStatus();
 616
 617             /// very special case (TODO: move to a common place for all the remote operations)
 618             if (result.getCode() == ResultCode.SSL_RECOVERABLE_PEER_UNVERIFIED) {
 619                 mLastSslUntrustedServerResult = result;
 620                 showDialog(DIALOG_SSL_VALIDATOR);
 621             }
 622
 623             /// retrieve discovered version and normalize server URL
 624             mDiscoveredVersion = operation.getDiscoveredVersion();
 625             mHostBaseUrl = normalizeUrl(mHostUrlInput.getText().toString());
 626
 627             /// allow or not the user try to access the server
 628             mOkButton.setEnabled(mServerIsValid);
 629
 630         }   // else nothing ; only the last check operation is considered;
 631         // multiple can be triggered if the user amends a URL before a previous check can be triggered
 632     }
 633
 634
 635     private String normalizeUrl(String url) {
 636         if (url != null && url.length() > 0) {
 637             url = url.trim();
 638             if (!url.toLowerCase().startsWith("http://") &&
 639                     !url.toLowerCase().startsWith("https://")) {
 640                 if (mIsSslConn) {
 641                     url = "https://" + url;
 642                 } else {
 643                     url = "http://" + url;
 644                 }
 645             }
 646
 647             // OC-208: Add suffix remote.php/webdav to normalize (OC-34)
 648             url = trimUrlWebdav(url);
 649
 650             if (url.endsWith("/")) {
 651                 url = url.substring(0, url.length() - 1);
 652             }
 653
 654         }
 655         Log_OC.d(TAG, "URL Normalize " + url);
 656         return (url != null ? url : "");
 657     }
 658
 659
 660     private String trimUrlWebdav(String url){
 661         if(url.toLowerCase().endsWith(WEBDAV_PATH)){
 662             url = url.substring(0, url.length() - WEBDAV_PATH.length());
 663         }
 664         return (url != null ? url : "");
 665     }
 666
 667
 668     /**
 669      * Chooses the right icon and text to show to the user for the received operation result.
 670      *
 671      * @param result    Result of a remote operation performed in this activity
 672      */
 673     private void updateServerStatusIconAndText(RemoteOperationResult result) {
 674         mServerStatusIcon = R.drawable.common_error;    // the most common case in the switch below
 675
 676         switch (result.getCode()) {
 677         case OK_SSL:
 678             mServerStatusIcon = android.R.drawable.ic_secure;
 679             mServerStatusText = R.string.auth_secure_connection;
 680             break;
 681
 682         case OK_NO_SSL:
 683         case OK:
 684             if (mHostUrlInput.getText().toString().trim().toLowerCase().startsWith("http://") ) {
 685                 mServerStatusText = R.string.auth_connection_established;
 686                 mServerStatusIcon = R.drawable.ic_ok;
 687             } else {
 688                 mServerStatusText = R.string.auth_nossl_plain_ok_title;
 689                 mServerStatusIcon = android.R.drawable.ic_partial_secure;
 690             }
 691             break;
 692
 693         case NO_NETWORK_CONNECTION:
 694             mServerStatusIcon = R.drawable.no_network;
 695             mServerStatusText = R.string.auth_no_net_conn_title;
 696             break;
 697
 698         case SSL_RECOVERABLE_PEER_UNVERIFIED:
 699             mServerStatusText = R.string.auth_ssl_unverified_server_title;
 700             break;
 701         case BAD_OC_VERSION:
 702             mServerStatusText = R.string.auth_bad_oc_version_title;
 703             break;
 704         case WRONG_CONNECTION:
 705             mServerStatusText = R.string.auth_wrong_connection_title;
 706             break;
 707         case TIMEOUT:
 708             mServerStatusText = R.string.auth_timeout_title;
 709             break;
 710         case INCORRECT_ADDRESS:
 711             mServerStatusText = R.string.auth_incorrect_address_title;
 712             break;
 713         case SSL_ERROR:
 714             mServerStatusText = R.string.auth_ssl_general_error_title;
 715             break;
 716         case UNAUTHORIZED:
 717             mServerStatusText = R.string.auth_unauthorized;
 718             break;
 719         case HOST_NOT_AVAILABLE:
 720             mServerStatusText = R.string.auth_unknown_host_title;
 721             break;
 722         case INSTANCE_NOT_CONFIGURED:
 723             mServerStatusText = R.string.auth_not_configured_title;
 724             break;
 725         case FILE_NOT_FOUND:
 726             mServerStatusText = R.string.auth_incorrect_path_title;
 727             break;
 728         case OAUTH2_ERROR:
 729             mServerStatusText = R.string.auth_oauth_error;
 730             break;
 731         case OAUTH2_ERROR_ACCESS_DENIED:
 732             mServerStatusText = R.string.auth_oauth_error_access_denied;
 733             break;
 734         case UNHANDLED_HTTP_CODE:
 735         case UNKNOWN_ERROR:
 736             mServerStatusText = R.string.auth_unknown_error_title;
 737             break;
 738         default:
 739             mServerStatusText = 0;
 740             mServerStatusIcon = 0;
 741         }
 742     }
 743
 744
 745     /**
 746      * Chooses the right icon and text to show to the user for the received operation result.
 747      *
 748      * @param result    Result of a remote operation performed in this activity
 749      */
 750     private void updateAuthStatusIconAndText(RemoteOperationResult result) {
 751         mAuthStatusIcon = R.drawable.common_error;    // the most common case in the switch below
 752
 753         switch (result.getCode()) {
 754         case OK_SSL:
 755             mAuthStatusIcon = android.R.drawable.ic_secure;
 756             mAuthStatusText = R.string.auth_secure_connection;
 757             break;
 758
 759         case OK_NO_SSL:
 760         case OK:
 761             if (mHostUrlInput.getText().toString().trim().toLowerCase().startsWith("http://") ) {
 762                 mAuthStatusText = R.string.auth_connection_established;
 763                 mAuthStatusIcon = R.drawable.ic_ok;
 764             } else {
 765                 mAuthStatusText = R.string.auth_nossl_plain_ok_title;
 766                 mAuthStatusIcon = android.R.drawable.ic_partial_secure;
 767             }
 768             break;
 769
 770         case NO_NETWORK_CONNECTION:
 771             mAuthStatusIcon = R.drawable.no_network;
 772             mAuthStatusText = R.string.auth_no_net_conn_title;
 773             break;
 774
 775         case SSL_RECOVERABLE_PEER_UNVERIFIED:
 776             mAuthStatusText = R.string.auth_ssl_unverified_server_title;
 777             break;
 778         case BAD_OC_VERSION:
 779             mAuthStatusText = R.string.auth_bad_oc_version_title;
 780             break;
 781         case WRONG_CONNECTION:
 782             mAuthStatusText = R.string.auth_wrong_connection_title;
 783             break;
 784         case TIMEOUT:
 785             mAuthStatusText = R.string.auth_timeout_title;
 786             break;
 787         case INCORRECT_ADDRESS:
 788             mAuthStatusText = R.string.auth_incorrect_address_title;
 789             break;
 790         case SSL_ERROR:
 791             mAuthStatusText = R.string.auth_ssl_general_error_title;
 792             break;
 793         case UNAUTHORIZED:
 794             mAuthStatusText = R.string.auth_unauthorized;
 795             break;
 796         case HOST_NOT_AVAILABLE:
 797             mAuthStatusText = R.string.auth_unknown_host_title;
 798             break;
 799         case INSTANCE_NOT_CONFIGURED:
 800             mAuthStatusText = R.string.auth_not_configured_title;
 801             break;
 802         case FILE_NOT_FOUND:
 803             mAuthStatusText = R.string.auth_incorrect_path_title;
 804             break;
 805         case OAUTH2_ERROR:
 806             mAuthStatusText = R.string.auth_oauth_error;
 807             break;
 808         case OAUTH2_ERROR_ACCESS_DENIED:
 809             mAuthStatusText = R.string.auth_oauth_error_access_denied;
 810             break;
 811         case UNHANDLED_HTTP_CODE:
 812         case UNKNOWN_ERROR:
 813             mAuthStatusText = R.string.auth_unknown_error_title;
 814             break;
 815         default:
 816             mAuthStatusText = 0;
 817             mAuthStatusIcon = 0;
 818         }
 819     }
 820
 821
 822     /**
 823      * Processes the result of the request for and access token send
 824      * to an OAuth authorization server.
 825      *
 826      * @param operation     Operation performed requesting the access token.
 827      * @param result        Result of the operation.
 828      */
 829     private void onGetOAuthAccessTokenFinish(OAuth2GetAccessToken operation, RemoteOperationResult result) {
 830         try {
 831             dismissDialog(DIALOG_OAUTH2_LOGIN_PROGRESS);
 832         } catch (IllegalArgumentException e) {
 833             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 834         }
 835
 836         String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, true);
 837         if (result.isSuccess() && webdav_path != null) {
 838             /// be gentle with the user
 839             showDialog(DIALOG_LOGIN_PROGRESS);
 840
 841             /// time to test the retrieved access token on the ownCloud server
 842             mOAuthAccessToken = ((OAuth2GetAccessToken)operation).getResultTokenMap().get(OAuth2Constants.KEY_ACCESS_TOKEN);
 843             Log_OC.d(TAG, "Got ACCESS TOKEN: " + mOAuthAccessToken);
 844             mAuthCheckOperation = new ExistenceCheckOperation("", this, false);
 845             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this);
 846             client.setBearerCredentials(mOAuthAccessToken);
 847             mAuthCheckOperation.execute(client, this, mHandler);
 848
 849         } else {
 850             updateAuthStatusIconAndText(result);
 851             showAuthStatus();
 852             Log_OC.d(TAG, "Access failed: " + result.getLogMessage());
 853         }
 854     }
 855
 856
 857     /**
 858      * Processes the result of the access check performed to try the user credentials.
 859      *
 860      * Creates a new account through the AccountManager.
 861      *
 862      * @param operation     Access check performed.
 863      * @param result        Result of the operation.
 864      */
 865     private void onAuthorizationCheckFinish(ExistenceCheckOperation operation, RemoteOperationResult result) {
 866         try {
 867             dismissDialog(DIALOG_LOGIN_PROGRESS);
 868         } catch (IllegalArgumentException e) {
 869             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 870         }
 871
 872         if (result.isSuccess()) {
 873             Log_OC.d(TAG, "Successful access - time to save the account");
 874
 875             if (mAction == ACTION_CREATE) {
 876                 createAccount();
 877
 878             } else {
 879                 updateToken();
 880             }
 881
 882             finish();
 883
 884         } else {
 885             updateAuthStatusIconAndText(result);
 886             showAuthStatus();
 887             Log_OC.d(TAG, "Access failed: " + result.getLogMessage());
 888         }
 889     }
 890
 891
 892     /**
 893      * Sets the proper response to get that the Account Authenticator that started this activity saves
 894      * a new authorization token for mAccount.
 895      */
 896     private void updateToken() {
 897         Bundle response = new Bundle();
 898         response.putString(AccountManager.KEY_ACCOUNT_NAME, mAccount.name);
 899         response.putString(AccountManager.KEY_ACCOUNT_TYPE, mAccount.type);
 900         boolean isOAuth = mOAuth2Check.isChecked();
 901         if (isOAuth) {
 902             response.putString(AccountManager.KEY_AUTHTOKEN, mOAuthAccessToken);
 903             // the next line is necessary; by now, notifications are calling directly to the AuthenticatorActivity to update, without AccountManager intervention
 904             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
 905         } else {
 906             response.putString(AccountManager.KEY_AUTHTOKEN, mPasswordInput.getText().toString());
 907             mAccountMgr.setPassword(mAccount, mPasswordInput.getText().toString());
 908         }
 909         setAccountAuthenticatorResult(response);
 910     }
 911
 912
 913     /**
 914      * Creates a new account through the Account Authenticator that started this activity.
 915      *
 916      * This makes the account permanent.
 917      *
 918      * TODO Decide how to name the OAuth accounts
 919      */
 920     private void createAccount() {
 921         /// create and save new ownCloud account
 922         boolean isOAuth = mOAuth2Check.isChecked();
 923
 924         Uri uri = Uri.parse(mHostBaseUrl);
 925         String username = mUsernameInput.getText().toString().trim();
 926         if (isOAuth) {
 927             username = "OAuth_user" + (new java.util.Random(System.currentTimeMillis())).nextLong();
 928         }
 929         String accountName = username + "@" + uri.getHost();
 930         if (uri.getPort() >= 0) {
 931             accountName += ":" + uri.getPort();
 932         }
 933         mAccount = new Account(accountName, AccountAuthenticator.ACCOUNT_TYPE);
 934         if (isOAuth) {
 935             mAccountMgr.addAccountExplicitly(mAccount, "", null);  // with our implementation, the password is never input in the app
 936         } else {
 937             mAccountMgr.addAccountExplicitly(mAccount, mPasswordInput.getText().toString(), null);
 938         }
 939
 940         /// add the new account as default in preferences, if there is none already
 941         Account defaultAccount = AccountUtils.getCurrentOwnCloudAccount(this);
 942         if (defaultAccount == null) {
 943             SharedPreferences.Editor editor = PreferenceManager
 944                     .getDefaultSharedPreferences(this).edit();
 945             editor.putString("select_oc_account", accountName);
 946             editor.commit();
 947         }
 948
 949         /// prepare result to return to the Authenticator
 950         //  TODO check again what the Authenticator makes with it; probably has the same effect as addAccountExplicitly, but it's not well done
 951         final Intent intent = new Intent();
 952         intent.putExtra(AccountManager.KEY_ACCOUNT_TYPE,    AccountAuthenticator.ACCOUNT_TYPE);
 953         intent.putExtra(AccountManager.KEY_ACCOUNT_NAME,    mAccount.name);
 954         if (!isOAuth)
 955             intent.putExtra(AccountManager.KEY_AUTHTOKEN,   AccountAuthenticator.ACCOUNT_TYPE); // TODO check this; not sure it's right; maybe
 956         intent.putExtra(AccountManager.KEY_USERDATA,        username);
 957         if (isOAuth) {
 958             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
 959         }
 960         /// add user data to the new account; TODO probably can be done in the last parameter addAccountExplicitly, or in KEY_USERDATA
 961         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_VERSION,    mDiscoveredVersion.toString());
 962         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_BASE_URL,   mHostBaseUrl);
 963         if (isOAuth)
 964             mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_SUPPORTS_OAUTH2, "TRUE");  // TODO this flag should be unnecessary
 965
 966         setAccountAuthenticatorResult(intent.getExtras());
 967         setResult(RESULT_OK, intent);
 968
 969         /// immediately request for the synchronization of the new account
 970         Bundle bundle = new Bundle();
 971         bundle.putBoolean(ContentResolver.SYNC_EXTRAS_MANUAL, true);
 972         ContentResolver.requestSync(mAccount, AccountAuthenticator.AUTHORITY, bundle);
 973     }
 974
 975
 976     /**
 977      * {@inheritDoc}
 978      *
 979      * Necessary to update the contents of the SSL Dialog
 980      *
 981      * TODO move to some common place for all possible untrusted SSL failures
 982      */
 983     @Override
 984     protected void onPrepareDialog(int id, Dialog dialog, Bundle args) {
 985         switch (id) {
 986         case DIALOG_LOGIN_PROGRESS:
 987         case DIALOG_CERT_NOT_SAVED:
 988         case DIALOG_OAUTH2_LOGIN_PROGRESS:
 989             break;
 990         case DIALOG_SSL_VALIDATOR: {
 991             ((SslValidatorDialog)dialog).updateResult(mLastSslUntrustedServerResult);
 992             break;
 993         }
 994         default:
 995             Log_OC.e(TAG, "Incorrect dialog called with id = " + id);
 996         }
 997     }
 998
 999
1000     /**
1001      * {@inheritDoc}
1002      */
1003     @Override
1004     protected Dialog onCreateDialog(int id) {
1005         Dialog dialog = null;
1006         switch (id) {
1007         case DIALOG_LOGIN_PROGRESS: {
1008             /// simple progress dialog
1009             ProgressDialog working_dialog = new ProgressDialog(this);
1010             working_dialog.setMessage(getResources().getString(R.string.auth_trying_to_login));
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                     /// TODO study if this is enough
1018                     Log_OC.i(TAG, "Login canceled");
1019                     if (mOperationThread != null) {
1020                         mOperationThread.interrupt();
1021                         finish();
1022                     }
1023                 }
1024             });
1025             dialog = working_dialog;
1026             break;
1027         }
1028         case DIALOG_OAUTH2_LOGIN_PROGRESS: {
1029             ProgressDialog working_dialog = new ProgressDialog(this);
1030             working_dialog.setMessage(String.format("Getting authorization"));
1031             working_dialog.setIndeterminate(true);
1032             working_dialog.setCancelable(true);
1033             working_dialog
1034             .setOnCancelListener(new DialogInterface.OnCancelListener() {
1035                 @Override
1036                 public void onCancel(DialogInterface dialog) {
1037                     Log_OC.i(TAG, "Login canceled");
1038                     finish();
1039                 }
1040             });
1041             dialog = working_dialog;
1042             break;
1043         }
1044         case DIALOG_SSL_VALIDATOR: {
1045             /// TODO start to use new dialog interface, at least for this (it is a FragmentDialog already)
1046             dialog = SslValidatorDialog.newInstance(this, mLastSslUntrustedServerResult, this);
1047             break;
1048         }
1049         case DIALOG_CERT_NOT_SAVED: {
1050             AlertDialog.Builder builder = new AlertDialog.Builder(this);
1051             builder.setMessage(getResources().getString(R.string.ssl_validator_not_saved));
1052             builder.setCancelable(false);
1053             builder.setPositiveButton(R.string.common_ok, new DialogInterface.OnClickListener() {
1054                 @Override
1055                 public void onClick(DialogInterface dialog, int which) {
1056                     dialog.dismiss();
1057                 };
1058             });
1059             dialog = builder.create();
1060             break;
1061         }
1062         default:
1063             Log_OC.e(TAG, "Incorrect dialog called with id = " + id);
1064         }
1065         return dialog;
1066     }
1067
1068
1069     /**
1070      * Starts and activity to open the 'new account' page in the ownCloud web site
1071      *
1072      * @param view      'Account register' button
1073      */
1074     public void onRegisterClick(View view) {
1075         Intent register = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.url_account_register)));
1076         setResult(RESULT_CANCELED);
1077         startActivity(register);
1078     }
1079
1080
1081     /**
1082      * Updates the content and visibility state of the icon and text associated
1083      * to the last check on the ownCloud server.
1084      */
1085     private void showServerStatus() {
1086         TextView tv = (TextView) findViewById(R.id.server_status_text);
1087
1088         if (mServerStatusIcon == 0 && mServerStatusText == 0) {
1089             tv.setVisibility(View.INVISIBLE);
1090
1091         } else {
1092             tv.setText(mServerStatusText);
1093             tv.setCompoundDrawablesWithIntrinsicBounds(mServerStatusIcon, 0, 0, 0);
1094             tv.setVisibility(View.VISIBLE);
1095         }
1096
1097     }
1098
1099
1100     /**
1101      * Updates the content and visibility state of the icon and text associated
1102      * to the interactions with the OAuth authorization server.
1103      */
1104     private void showAuthStatus() {
1105         if (mAuthStatusIcon == 0 && mAuthStatusText == 0) {
1106             mAuthStatusLayout.setVisibility(View.INVISIBLE);
1107
1108         } else {
1109             mAuthStatusLayout.setText(mAuthStatusText);
1110             mAuthStatusLayout.setCompoundDrawablesWithIntrinsicBounds(mAuthStatusIcon, 0, 0, 0);
1111             mAuthStatusLayout.setVisibility(View.VISIBLE);
1112         }
1113     }
1114
1115
1116     private void showRefreshButton() {
1117         mHostUrlInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_action_refresh_black, 0);
1118     }
1119
1120     private void hideRefreshButton() {
1121         mHostUrlInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0);
1122     }
1123
1124     /**
1125      * Called when the refresh button in the input field for ownCloud host is clicked.
1126      *
1127      * Performs a new check on the URL in the input field.
1128      *
1129      * @param view      Refresh 'button'
1130      */
1131     public void onRefreshClick(View view) {
1132         checkOcServer();
1133     }
1134
1135
1136     /**
1137      * Called when the eye icon in the password field is clicked.
1138      *
1139      * Toggles the visibility of the password in the field.
1140      *
1141      * @param view      'View password' 'button'
1142      */
1143     public void onViewPasswordClick(View view) {
1144         int selectionStart = mPasswordInput.getSelectionStart();
1145         int selectionEnd = mPasswordInput.getSelectionEnd();
1146         int input_type = mPasswordInput.getInputType();
1147         if ((input_type & InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD) == InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD) {
1148             input_type = InputType.TYPE_CLASS_TEXT
1149                     | InputType.TYPE_TEXT_VARIATION_PASSWORD;
1150         } else {
1151             input_type = InputType.TYPE_CLASS_TEXT
1152                     | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD;
1153         }
1154         mPasswordInput.setInputType(input_type);
1155         mPasswordInput.setSelection(selectionStart, selectionEnd);
1156     }
1157
1158
1159     /**
1160      * Called when the checkbox for OAuth authorization is clicked.
1161      *
1162      * Hides or shows the input fields for user & password.
1163      *
1164      * @param view      'View password' 'button'
1165      */
1166     public void onCheckClick(View view) {
1167         CheckBox oAuth2Check = (CheckBox)view;
1168         changeViewByOAuth2Check(oAuth2Check.isChecked());
1169
1170     }
1171
1172     /**
1173      * Changes the visibility of input elements depending upon the kind of authorization
1174      * chosen by the user: basic or OAuth
1175      *
1176      * @param checked       'True' when OAuth is selected.
1177      */
1178     public void changeViewByOAuth2Check(Boolean checked) {
1179
1180         if (checked) {
1181             mOAuthAuthEndpointText.setVisibility(View.VISIBLE);
1182             mOAuthTokenEndpointText.setVisibility(View.VISIBLE);
1183             mUsernameInput.setVisibility(View.GONE);
1184             mPasswordInput.setVisibility(View.GONE);
1185             mViewPasswordButton.setVisibility(View.GONE);
1186         } else {
1187             mOAuthAuthEndpointText.setVisibility(View.GONE);
1188             mOAuthTokenEndpointText.setVisibility(View.GONE);
1189             mUsernameInput.setVisibility(View.VISIBLE);
1190             mPasswordInput.setVisibility(View.VISIBLE);
1191             mViewPasswordButton.setVisibility(View.INVISIBLE);
1192         }
1193
1194     }
1195
1196     /**
1197      * Called from SslValidatorDialog when a new server certificate was correctly saved.
1198      */
1199     public void onSavedCertificate() {
1200         mOperationThread = mOcServerChkOperation.retry(this, mHandler);
1201     }
1202
1203     /**
1204      * Called from SslValidatorDialog when a new server certificate could not be saved
1205      * when the user requested it.
1206      */
1207     @Override
1208     public void onFailedSavingCertificate() {
1209         showDialog(DIALOG_CERT_NOT_SAVED);
1210     }
1211
1212
1213     /**
1214      *  Called when the 'action' button in an IME is pressed ('enter' in software keyboard).
1215      *
1216      *  Used to trigger the authorization check when the user presses 'enter' after writing the password.
1217      */
1218     @Override
1219     public boolean onEditorAction(TextView inputField, int actionId, KeyEvent event) {
1220         if (inputField != null && inputField.equals(mPasswordInput) &&
1221                 actionId == EditorInfo.IME_ACTION_DONE) {
1222             if (mOkButton.isEnabled()) {
1223                 mOkButton.performClick();
1224             }
1225         }
1226         return false;   // always return false to grant that the software keyboard is hidden anyway
1227     }
1228
1229
1230     private abstract static class RightDrawableOnTouchListener implements OnTouchListener  {
1231
1232         private int fuzz = 10;
1233
1234         /**
1235          * {@inheritDoc}
1236          */
1237         @Override
1238         public boolean onTouch(View view, MotionEvent event) {
1239             if (event.getAction() == MotionEvent.ACTION_DOWN) {
1240                 Drawable rightDrawable = null;
1241                 if (view instanceof TextView) {
1242                     Drawable[] drawables = ((TextView)view).getCompoundDrawables();
1243                     if (drawables.length > 2) {
1244                         rightDrawable = drawables[2];
1245                     }
1246                 }
1247                 if (rightDrawable != null) {
1248                     final int x = (int) event.getX();
1249                     final int y = (int) event.getY();
1250                     final Rect bounds = rightDrawable.getBounds();
1251                     if (x >= (view.getRight() - bounds.width() - fuzz) && x <= (view.getRight() - view.getPaddingRight() + fuzz)
1252                             && y >= (view.getPaddingTop() - fuzz) && y <= (view.getHeight() - view.getPaddingBottom()) + fuzz) {
1253
1254                         return onDrawableTouch(event);
1255                     }
1256                 }
1257             }
1258             return false;
1259         }
1260
1261         public abstract boolean onDrawableTouch(final MotionEvent event);
1262     }
1263
1264 }