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_CHECKED_AND_VALID = "SERVER_CHECKED_AND_VALID";
  93     private static final String KEY_SERVER_CHECK_IN_PROGRESS = "SERVER_CHECK_IN_PROGRESS";
  94     private static final String KEY_SERVER_STATUS_TEXT = "SERVER_STATUS_TEXT";
  95     private static final String KEY_SERVER_STATUS_ICON = "SERVER_STATUS_ICON";
  96     private static final String KEY_IS_SSL_CONN = "IS_SSL_CONN";
  97     private static final String KEY_AUTH_STATUS_TEXT = "AUTH_STATUS_TEXT";
  98     private static final String KEY_AUTH_STATUS_ICON = "AUTH_STATUS_ICON";
  99
 100     private static final String OAUTH_MODE_ON = "on";
 101     private static final String OAUTH_MODE_OFF = "off";
 102     private static final String OAUTH_MODE_OPTIONAL = "optional";
 103
 104     private static final int DIALOG_LOGIN_PROGRESS = 0;
 105     private static final int DIALOG_SSL_VALIDATOR = 1;
 106     private static final int DIALOG_CERT_NOT_SAVED = 2;
 107     private static final int DIALOG_OAUTH2_LOGIN_PROGRESS = 3;
 108
 109     public static final byte ACTION_CREATE = 0;
 110     public static final byte ACTION_UPDATE_TOKEN = 1;
 111
 112
 113     private String mHostBaseUrl;
 114     private OwnCloudVersion mDiscoveredVersion;
 115
 116     private int mServerStatusText, mServerStatusIcon;
 117     private boolean mServerCheckedAndValid, mIsSslConn;
 118     private int mAuthStatusText, mAuthStatusIcon;
 119
 120     private final Handler mHandler = new Handler();
 121     private Thread mOperationThread;
 122     private OwnCloudServerCheckOperation mOcServerChkOperation;
 123     private ExistenceCheckOperation mAuthCheckOperation;
 124     private RemoteOperationResult mLastSslUntrustedServerResult;
 125
 126     private Uri mNewCapturedUriFromOAuth2Redirection;
 127
 128     private AccountManager mAccountMgr;
 129     private boolean mJustCreated;
 130     private byte mAction;
 131     private Account mAccount;
 132
 133     private ImageView mViewPasswordButton;
 134     private EditText mHostUrlInput;
 135     private EditText mUsernameInput;
 136     private EditText mPasswordInput;
 137     private CheckBox mOAuth2Check;
 138     private String mOAuthAccessToken;
 139     private View mOkButton;
 140     private TextView mAuthStatusLayout;
 141
 142     private TextView mOAuthAuthEndpointText;
 143     private TextView mOAuthTokenEndpointText;
 144
 145     private HostUrlWatcher mHostUrlChangedListener;
 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             mServerCheckedAndValid = 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             mServerCheckedAndValid = savedInstanceState.getBoolean(KEY_SERVER_CHECKED_AND_VALID);
 213             mServerStatusText = savedInstanceState.getInt(KEY_SERVER_STATUS_TEXT);
 214             mServerStatusIcon = savedInstanceState.getInt(KEY_SERVER_STATUS_ICON);
 215             mIsSslConn = savedInstanceState.getBoolean(KEY_IS_SSL_CONN);
 216             mAuthStatusText = savedInstanceState.getInt(KEY_AUTH_STATUS_TEXT);
 217             mAuthStatusIcon = savedInstanceState.getInt(KEY_AUTH_STATUS_ICON);
 218
 219             /// server data
 220             String ocVersion = savedInstanceState.getString(KEY_OC_VERSION);
 221             if (ocVersion != null) {
 222                 mDiscoveredVersion = new OwnCloudVersion(ocVersion);
 223             }
 224             mHostBaseUrl = savedInstanceState.getString(KEY_HOST_URL_TEXT);
 225
 226             // account data, if updating
 227             mAccount = savedInstanceState.getParcelable(KEY_ACCOUNT);
 228
 229             // check if server check was interrupted by a configuration change
 230             if (savedInstanceState.getBoolean(KEY_SERVER_CHECK_IN_PROGRESS, false)) {
 231                 checkOcServer();
 232             }
 233
 234         }
 235
 236         showServerStatus();
 237         showAuthStatus();
 238
 239         if (!OAUTH_MODE_OPTIONAL.equals(getString(R.string.oauth2_mode))) {
 240             mOAuth2Check.setVisibility(View.GONE);
 241         }
 242
 243         if (mAction == ACTION_UPDATE_TOKEN) {
 244             /// lock things that should not change
 245             mHostUrlInput.setEnabled(false);
 246             mUsernameInput.setEnabled(false);
 247             mOAuth2Check.setVisibility(View.GONE);
 248             if (!mServerCheckedAndValid && mOcServerChkOperation == null) {
 249                 checkOcServer();
 250             }
 251         }
 252
 253         mPasswordInput.setText("");     // clean password to avoid social hacking (disadvantage: password in removed if the device is turned aside)
 254         mJustCreated = true;
 255
 256         /// bind view elements to listeners
 257         mHostUrlInput.setOnFocusChangeListener(this);
 258         mHostUrlInput.setOnTouchListener(new RightDrawableOnTouchListener() {
 259             @Override
 260             public boolean onDrawableTouch(final MotionEvent event) {
 261                 AuthenticatorActivity.this.onRefreshClick(mHostUrlInput);
 262                 return true;
 263             }
 264         });
 265         mPasswordInput.setOnFocusChangeListener(this);
 266         mPasswordInput.setImeOptions(EditorInfo.IME_ACTION_DONE);
 267         mPasswordInput.setOnEditorActionListener(this);
 268     }
 269
 270     @Override
 271     protected void onStart() {
 272         super.onStart();
 273         //mHostUrlChangedListener = new  HostUrlWatcher();
 274         //mHostUrlInput.addTextChangedListener(mHostUrlChangedListener);
 275     }
 276
 277     @Override
 278     protected void onStop() {
 279         super.onStop();
 280         mHostUrlInput.removeTextChangedListener(mHostUrlChangedListener);
 281     }
 282
 283
 284     /**
 285      * Saves relevant state before {@link #onPause()}
 286      *
 287      * Do NOT save {@link #mNewCapturedUriFromOAuth2Redirection}; it keeps a temporal flag, intended to defer the
 288      * processing of the redirection caught in {@link #onNewIntent(Intent)} until {@link #onResume()}
 289      *
 290      * See {@link #loadSavedInstanceState(Bundle)}
 291      */
 292     @Override
 293     protected void onSaveInstanceState(Bundle outState) {
 294         super.onSaveInstanceState(outState);
 295
 296         /// connection state and info
 297         outState.putInt(KEY_SERVER_STATUS_TEXT, mServerStatusText);
 298         outState.putInt(KEY_SERVER_STATUS_ICON, mServerStatusIcon);
 299         outState.putBoolean(KEY_SERVER_CHECKED_AND_VALID, mServerCheckedAndValid);
 300         outState.putBoolean(KEY_SERVER_CHECK_IN_PROGRESS, (!mServerCheckedAndValid && mOcServerChkOperation != null));
 301         outState.putBoolean(KEY_IS_SSL_CONN, mIsSslConn);
 302         outState.putInt(KEY_AUTH_STATUS_ICON, mAuthStatusIcon);
 303         outState.putInt(KEY_AUTH_STATUS_TEXT, mAuthStatusText);
 304
 305         /// server data
 306         if (mDiscoveredVersion != null) {
 307             outState.putString(KEY_OC_VERSION, mDiscoveredVersion.toString());
 308         }
 309         outState.putString(KEY_HOST_URL_TEXT, mHostBaseUrl);
 310
 311         /// account data, if updating
 312         if (mAccount != null) {
 313             outState.putParcelable(KEY_ACCOUNT, mAccount);
 314         }
 315
 316     }
 317
 318
 319     /**
 320      * The redirection triggered by the OAuth authentication server as response to the GET AUTHORIZATION request
 321      * is caught here.
 322      *
 323      * To make this possible, this activity needs to be qualified with android:launchMode = "singleTask" in the
 324      * AndroidManifest.xml file.
 325      */
 326     @Override
 327     protected void onNewIntent (Intent intent) {
 328         Log_OC.d(TAG, "onNewIntent()");
 329         Uri data = intent.getData();
 330         if (data != null && data.toString().startsWith(getString(R.string.oauth2_redirect_uri))) {
 331             mNewCapturedUriFromOAuth2Redirection = data;
 332         }
 333     }
 334
 335
 336     /**
 337      * The redirection triggered by the OAuth authentication server as response to the GET AUTHORIZATION, and
 338      * deferred in {@link #onNewIntent(Intent)}, is processed here.
 339      */
 340     @Override
 341     protected void onResume() {
 342         super.onResume();
 343         // the state of mOAuth2Check is automatically recovered between configuration changes, but not before onCreate() finishes; so keep the next lines here
 344         changeViewByOAuth2Check(mOAuth2Check.isChecked());
 345         if (mAction == ACTION_UPDATE_TOKEN && mJustCreated) {
 346             if (mOAuth2Check.isChecked())
 347                 Toast.makeText(this, R.string.auth_expired_oauth_token_toast, Toast.LENGTH_LONG).show();
 348             else
 349                 Toast.makeText(this, R.string.auth_expired_basic_auth_toast, Toast.LENGTH_LONG).show();
 350         }
 351
 352         if (mNewCapturedUriFromOAuth2Redirection != null) {
 353             getOAuth2AccessTokenFromCapturedRedirection();
 354         }
 355
 356         mJustCreated = false;
 357     }
 358
 359
 360     /**
 361      * Parses the redirection with the response to the GET AUTHORIZATION request to the
 362      * oAuth server and requests for the access token (GET ACCESS TOKEN)
 363      */
 364     private void getOAuth2AccessTokenFromCapturedRedirection() {
 365         /// Parse data from OAuth redirection
 366         String queryParameters = mNewCapturedUriFromOAuth2Redirection.getQuery();
 367         mNewCapturedUriFromOAuth2Redirection = null;
 368
 369         /// Showing the dialog with instructions for the user.
 370         showDialog(DIALOG_OAUTH2_LOGIN_PROGRESS);
 371
 372         /// GET ACCESS TOKEN to the oAuth server
 373         RemoteOperation operation = new OAuth2GetAccessToken(   getString(R.string.oauth2_client_id),
 374                                                                 getString(R.string.oauth2_redirect_uri),
 375                                                                 getString(R.string.oauth2_grant_type),
 376                                                                 queryParameters);
 377         //WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(getString(R.string.oauth2_url_endpoint_access)), getApplicationContext());
 378         WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mOAuthTokenEndpointText.getText().toString().trim()), getApplicationContext());
 379         operation.execute(client, this, mHandler);
 380     }
 381
 382
 383
 384     /**
 385      * Handles the change of focus on the text inputs for the server URL and the password
 386      */
 387     public void onFocusChange(View view, boolean hasFocus) {
 388         if (view.getId() == R.id.hostUrlInput && !hasFocus) {
 389             onUrlInputFocusLost((TextView) view);
 390
 391         } else if (view.getId() == R.id.account_password) {
 392             onPasswordFocusChanged((TextView) view, hasFocus);
 393         }
 394     }
 395
 396
 397     /**
 398      * Handles changes in focus on the text input for the server URL.
 399      *
 400      * IMPORTANT ENTRY POINT 2: When (!hasFocus), user wrote the server URL and changed to
 401      * other field. The operation to check the existence of the server in the entered URL is
 402      * started.
 403      *
 404      * When hasFocus:    user 'comes back' to write again the server URL.
 405      *
 406      * @param hostInput     TextView with the URL input field receiving the change of focus.
 407      */
 408     private void onUrlInputFocusLost(TextView hostInput) {
 409         if (!mHostBaseUrl.equals(normalizeUrl(mHostUrlInput.getText().toString()))) {
 410             checkOcServer();
 411         }
 412     }
 413
 414
 415     private void checkOcServer() {
 416         String uri = mHostUrlInput.getText().toString().trim();
 417         mServerCheckedAndValid = false;
 418         mOkButton.setEnabled(false);
 419         mDiscoveredVersion = null;
 420         hideRefreshButton();
 421         if (uri.length() != 0) {
 422             mServerStatusText = R.string.auth_testing_connection;
 423             mServerStatusIcon = R.drawable.progress_small;
 424             showServerStatus();
 425             mOcServerChkOperation = new  OwnCloudServerCheckOperation(uri, this);
 426             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(uri), this);
 427             mOperationThread = mOcServerChkOperation.execute(client, this, mHandler);
 428         } else {
 429             mServerStatusText = 0;
 430             mServerStatusIcon = 0;
 431             showServerStatus();
 432         }
 433     }
 434
 435
 436     /**
 437      * Handles changes in focus on the text input for the password (basic authorization).
 438      *
 439      * When (hasFocus), the button to toggle password visibility is shown.
 440      *
 441      * When (!hasFocus), the button is made invisible and the password is hidden.
 442      *
 443      * @param passwordInput    TextView with the password input field receiving the change of focus.
 444      * @param hasFocus          'True' if focus is received, 'false' if is lost
 445      */
 446     private void onPasswordFocusChanged(TextView passwordInput, boolean hasFocus) {
 447         if (hasFocus) {
 448             mViewPasswordButton.setVisibility(View.VISIBLE);
 449         } else {
 450             int input_type = InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD;
 451             passwordInput.setInputType(input_type);
 452             mViewPasswordButton.setVisibility(View.INVISIBLE);
 453         }
 454     }
 455
 456
 457
 458     /**
 459      * Cancels the authenticator activity
 460      *
 461      * IMPORTANT ENTRY POINT 3: Never underestimate the importance of cancellation
 462      *
 463      * This method is bound in the layout/acceoun_setup.xml resource file.
 464      *
 465      * @param view      Cancel button
 466      */
 467     public void onCancelClick(View view) {
 468         setResult(RESULT_CANCELED);     // TODO review how is this related to AccountAuthenticator (debugging)
 469         finish();
 470     }
 471
 472
 473
 474     /**
 475      * Checks the credentials of the user in the root of the ownCloud server
 476      * before creating a new local account.
 477      *
 478      * For basic authorization, a check of existence of the root folder is
 479      * performed.
 480      *
 481      * For OAuth, starts the flow to get an access token; the credentials test
 482      * is postponed until it is available.
 483      *
 484      * IMPORTANT ENTRY POINT 4
 485      *
 486      * @param view      OK button
 487      */
 488     public void onOkClick(View view) {
 489         // this check should be unnecessary
 490         if (mDiscoveredVersion == null || !mDiscoveredVersion.isVersionValid()  || mHostBaseUrl == null || mHostBaseUrl.length() == 0) {
 491             mServerStatusIcon = R.drawable.common_error;
 492             mServerStatusText = R.string.auth_wtf_reenter_URL;
 493             showServerStatus();
 494             mOkButton.setEnabled(false);
 495             Log_OC.wtf(TAG,  "The user was allowed to click 'connect' to an unchecked server!!");
 496             return;
 497         }
 498
 499         if (mOAuth2Check.isChecked()) {
 500             startOauthorization();
 501
 502         } else {
 503             checkBasicAuthorization();
 504         }
 505     }
 506
 507
 508     /**
 509      * Tests the credentials entered by the user performing a check of existence on
 510      * the root folder of the ownCloud server.
 511      */
 512     private void checkBasicAuthorization() {
 513         /// get the path to the root folder through WebDAV from the version server
 514         String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, false);
 515
 516         /// get basic credentials entered by user
 517         String username = mUsernameInput.getText().toString();
 518         String password = mPasswordInput.getText().toString();
 519
 520         /// be gentle with the user
 521         showDialog(DIALOG_LOGIN_PROGRESS);
 522
 523         /// test credentials accessing the root folder
 524         mAuthCheckOperation = new  ExistenceCheckOperation("", this, false);
 525         WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this);
 526         client.setBasicCredentials(username, password);
 527         mOperationThread = mAuthCheckOperation.execute(client, this, mHandler);
 528     }
 529
 530
 531     /**
 532      * Starts the OAuth 'grant type' flow to get an access token, with
 533      * a GET AUTHORIZATION request to the BUILT-IN authorization server.
 534      */
 535     private void startOauthorization() {
 536         // be gentle with the user
 537         mAuthStatusIcon = R.drawable.progress_small;
 538         mAuthStatusText = R.string.oauth_login_connection;
 539         showAuthStatus();
 540
 541         // GET AUTHORIZATION request
 542         //Uri uri = Uri.parse(getString(R.string.oauth2_url_endpoint_auth));
 543         Uri uri = Uri.parse(mOAuthAuthEndpointText.getText().toString().trim());
 544         Uri.Builder uriBuilder = uri.buildUpon();
 545         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_RESPONSE_TYPE, getString(R.string.oauth2_response_type));
 546         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_REDIRECT_URI, getString(R.string.oauth2_redirect_uri));
 547         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_CLIENT_ID, getString(R.string.oauth2_client_id));
 548         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_SCOPE, getString(R.string.oauth2_scope));
 549         //uriBuilder.appendQueryParameter(OAuth2Constants.KEY_STATE, whateverwewant);
 550         uri = uriBuilder.build();
 551         Log_OC.d(TAG, "Starting browser to view " + uri.toString());
 552         Intent i = new Intent(Intent.ACTION_VIEW, uri);
 553         startActivity(i);
 554     }
 555
 556
 557     /**
 558      * Callback method invoked when a RemoteOperation executed by this Activity finishes.
 559      *
 560      * Dispatches the operation flow to the right method.
 561      */
 562     @Override
 563     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 564
 565         if (operation instanceof OwnCloudServerCheckOperation) {
 566             onOcServerCheckFinish((OwnCloudServerCheckOperation) operation, result);
 567
 568         } else if (operation instanceof OAuth2GetAccessToken) {
 569             onGetOAuthAccessTokenFinish((OAuth2GetAccessToken)operation, result);
 570
 571         } else if (operation instanceof ExistenceCheckOperation)  {
 572             onAuthorizationCheckFinish((ExistenceCheckOperation)operation, result);
 573
 574         }
 575     }
 576
 577
 578     /**
 579      * Processes the result of the server check performed when the user finishes the enter of the
 580      * server URL.
 581      *
 582      * @param operation     Server check performed.
 583      * @param result        Result of the check.
 584      */
 585     private void onOcServerCheckFinish(OwnCloudServerCheckOperation operation, RemoteOperationResult result) {
 586         if (operation.equals(mOcServerChkOperation)) {
 587             /// save result state
 588             mServerCheckedAndValid = result.isSuccess();
 589             mIsSslConn = (result.getCode() == ResultCode.OK_SSL);
 590             mOcServerChkOperation = null;
 591
 592             /// update status icon and text
 593             if (mServerCheckedAndValid) {
 594                 hideRefreshButton();
 595             } else {
 596                 showRefreshButton();
 597             }
 598             updateServerStatusIconAndText(result);
 599             showServerStatus();
 600
 601             /// very special case (TODO: move to a common place for all the remote operations)
 602             if (result.getCode() == ResultCode.SSL_RECOVERABLE_PEER_UNVERIFIED) {
 603                 mLastSslUntrustedServerResult = result;
 604                 showDialog(DIALOG_SSL_VALIDATOR);
 605             }
 606
 607             /// retrieve discovered version and normalize server URL
 608             mDiscoveredVersion = operation.getDiscoveredVersion();
 609             mHostBaseUrl = normalizeUrl(mHostUrlInput.getText().toString());
 610
 611             /// allow or not the user try to access the server
 612             mOkButton.setEnabled(mServerCheckedAndValid);
 613
 614         }   // else nothing ; only the last check operation is considered;
 615             // multiple can be triggered if the user amends a URL before a previous check can be triggered
 616     }
 617
 618
 619     private String normalizeUrl(String url) {
 620         if (url != null && url.length() > 0) {
 621             url = url.trim();
 622             if (!url.toLowerCase().startsWith("http://") &&
 623                     !url.toLowerCase().startsWith("https://")) {
 624                 if (mIsSslConn) {
 625                     url = "https://" + url;
 626                 } else {
 627                     url = "http://" + url;
 628                 }
 629
 630             }
 631             if (url.endsWith("/")) {
 632                 url = url.substring(0, url.length() - 1);
 633             }
 634         }
 635         return url;
 636     }
 637
 638     /**
 639      * Chooses the right icon and text to show to the user for the received operation result.
 640      *
 641      * @param result    Result of a remote operation performed in this activity
 642      */
 643     private void updateServerStatusIconAndText(RemoteOperationResult result) {
 644         mServerStatusIcon = R.drawable.common_error;    // the most common case in the switch below
 645
 646         switch (result.getCode()) {
 647         case OK_SSL:
 648             mServerStatusIcon = android.R.drawable.ic_secure;
 649             mServerStatusText = R.string.auth_secure_connection;
 650             break;
 651
 652         case OK_NO_SSL:
 653         case OK:
 654             if (mHostUrlInput.getText().toString().trim().toLowerCase().startsWith("http://") ) {
 655                 mServerStatusText = R.string.auth_connection_established;
 656                 mServerStatusIcon = R.drawable.ic_ok;
 657             } else {
 658                 mServerStatusText = R.string.auth_nossl_plain_ok_title;
 659                 mServerStatusIcon = android.R.drawable.ic_partial_secure;
 660             }
 661             break;
 662
 663         case NO_NETWORK_CONNECTION:
 664             mServerStatusIcon = R.drawable.no_network;
 665             mServerStatusText = R.string.auth_no_net_conn_title;
 666             break;
 667
 668         case SSL_RECOVERABLE_PEER_UNVERIFIED:
 669             mServerStatusText = R.string.auth_ssl_unverified_server_title;
 670             break;
 671         case BAD_OC_VERSION:
 672             mServerStatusText = R.string.auth_bad_oc_version_title;
 673             break;
 674         case WRONG_CONNECTION:
 675             mServerStatusText = R.string.auth_wrong_connection_title;
 676             break;
 677         case TIMEOUT:
 678             mServerStatusText = R.string.auth_timeout_title;
 679             break;
 680         case INCORRECT_ADDRESS:
 681             mServerStatusText = R.string.auth_incorrect_address_title;
 682             break;
 683         case SSL_ERROR:
 684             mServerStatusText = R.string.auth_ssl_general_error_title;
 685             break;
 686         case UNAUTHORIZED:
 687             mServerStatusText = R.string.auth_unauthorized;
 688             break;
 689         case HOST_NOT_AVAILABLE:
 690             mServerStatusText = R.string.auth_unknown_host_title;
 691             break;
 692         case INSTANCE_NOT_CONFIGURED:
 693             mServerStatusText = R.string.auth_not_configured_title;
 694             break;
 695         case FILE_NOT_FOUND:
 696             mServerStatusText = R.string.auth_incorrect_path_title;
 697             break;
 698         case OAUTH2_ERROR:
 699             mServerStatusText = R.string.auth_oauth_error;
 700             break;
 701         case OAUTH2_ERROR_ACCESS_DENIED:
 702             mServerStatusText = R.string.auth_oauth_error_access_denied;
 703             break;
 704         case UNHANDLED_HTTP_CODE:
 705         case UNKNOWN_ERROR:
 706             mServerStatusText = R.string.auth_unknown_error_title;
 707             break;
 708         default:
 709             mServerStatusText = 0;
 710             mServerStatusIcon = 0;
 711         }
 712     }
 713
 714
 715     /**
 716      * Chooses the right icon and text to show to the user for the received operation result.
 717      *
 718      * @param result    Result of a remote operation performed in this activity
 719      */
 720     private void updateAuthStatusIconAndText(RemoteOperationResult result) {
 721         mAuthStatusIcon = R.drawable.common_error;    // the most common case in the switch below
 722
 723         switch (result.getCode()) {
 724         case OK_SSL:
 725             mAuthStatusIcon = android.R.drawable.ic_secure;
 726             mAuthStatusText = R.string.auth_secure_connection;
 727             break;
 728
 729         case OK_NO_SSL:
 730         case OK:
 731             if (mHostUrlInput.getText().toString().trim().toLowerCase().startsWith("http://") ) {
 732                 mAuthStatusText = R.string.auth_connection_established;
 733                 mAuthStatusIcon = R.drawable.ic_ok;
 734             } else {
 735                 mAuthStatusText = R.string.auth_nossl_plain_ok_title;
 736                 mAuthStatusIcon = android.R.drawable.ic_partial_secure;
 737             }
 738             break;
 739
 740         case NO_NETWORK_CONNECTION:
 741             mAuthStatusIcon = R.drawable.no_network;
 742             mAuthStatusText = R.string.auth_no_net_conn_title;
 743             break;
 744
 745         case SSL_RECOVERABLE_PEER_UNVERIFIED:
 746             mAuthStatusText = R.string.auth_ssl_unverified_server_title;
 747             break;
 748         case BAD_OC_VERSION:
 749             mAuthStatusText = R.string.auth_bad_oc_version_title;
 750             break;
 751         case WRONG_CONNECTION:
 752             mAuthStatusText = R.string.auth_wrong_connection_title;
 753             break;
 754         case TIMEOUT:
 755             mAuthStatusText = R.string.auth_timeout_title;
 756             break;
 757         case INCORRECT_ADDRESS:
 758             mAuthStatusText = R.string.auth_incorrect_address_title;
 759             break;
 760         case SSL_ERROR:
 761             mAuthStatusText = R.string.auth_ssl_general_error_title;
 762             break;
 763         case UNAUTHORIZED:
 764             mAuthStatusText = R.string.auth_unauthorized;
 765             break;
 766         case HOST_NOT_AVAILABLE:
 767             mAuthStatusText = R.string.auth_unknown_host_title;
 768             break;
 769         case INSTANCE_NOT_CONFIGURED:
 770             mAuthStatusText = R.string.auth_not_configured_title;
 771             break;
 772         case FILE_NOT_FOUND:
 773             mAuthStatusText = R.string.auth_incorrect_path_title;
 774             break;
 775         case OAUTH2_ERROR:
 776             mAuthStatusText = R.string.auth_oauth_error;
 777             break;
 778         case OAUTH2_ERROR_ACCESS_DENIED:
 779             mAuthStatusText = R.string.auth_oauth_error_access_denied;
 780             break;
 781         case UNHANDLED_HTTP_CODE:
 782         case UNKNOWN_ERROR:
 783             mAuthStatusText = R.string.auth_unknown_error_title;
 784             break;
 785         default:
 786             mAuthStatusText = 0;
 787             mAuthStatusIcon = 0;
 788         }
 789     }
 790
 791
 792     /**
 793      * Processes the result of the request for and access token send
 794      * to an OAuth authorization server.
 795      *
 796      * @param operation     Operation performed requesting the access token.
 797      * @param result        Result of the operation.
 798      */
 799     private void onGetOAuthAccessTokenFinish(OAuth2GetAccessToken operation, RemoteOperationResult result) {
 800         try {
 801             dismissDialog(DIALOG_OAUTH2_LOGIN_PROGRESS);
 802         } catch (IllegalArgumentException e) {
 803             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 804         }
 805
 806         String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, true);
 807         if (result.isSuccess() && webdav_path != null) {
 808             /// be gentle with the user
 809             showDialog(DIALOG_LOGIN_PROGRESS);
 810
 811             /// time to test the retrieved access token on the ownCloud server
 812             mOAuthAccessToken = ((OAuth2GetAccessToken)operation).getResultTokenMap().get(OAuth2Constants.KEY_ACCESS_TOKEN);
 813             Log_OC.d(TAG, "Got ACCESS TOKEN: " + mOAuthAccessToken);
 814             mAuthCheckOperation = new ExistenceCheckOperation("", this, false);
 815             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this);
 816             client.setBearerCredentials(mOAuthAccessToken);
 817             mAuthCheckOperation.execute(client, this, mHandler);
 818
 819         } else {
 820             updateAuthStatusIconAndText(result);
 821             showAuthStatus();
 822             Log_OC.d(TAG, "Access failed: " + result.getLogMessage());
 823         }
 824     }
 825
 826
 827     /**
 828      * Processes the result of the access check performed to try the user credentials.
 829      *
 830      * Creates a new account through the AccountManager.
 831      *
 832      * @param operation     Access check performed.
 833      * @param result        Result of the operation.
 834      */
 835     private void onAuthorizationCheckFinish(ExistenceCheckOperation operation, RemoteOperationResult result) {
 836         try {
 837             dismissDialog(DIALOG_LOGIN_PROGRESS);
 838         } catch (IllegalArgumentException e) {
 839             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 840         }
 841
 842         if (result.isSuccess()) {
 843             Log_OC.d(TAG, "Successful access - time to save the account");
 844
 845             if (mAction == ACTION_CREATE) {
 846                 createAccount();
 847
 848             } else {
 849                 updateToken();
 850             }
 851
 852             finish();
 853
 854         } else {
 855             updateAuthStatusIconAndText(result);
 856             showAuthStatus();
 857             Log_OC.d(TAG, "Access failed: " + result.getLogMessage());
 858         }
 859     }
 860
 861
 862     /**
 863      * Sets the proper response to get that the Account Authenticator that started this activity saves
 864      * a new authorization token for mAccount.
 865      */
 866     private void updateToken() {
 867         Bundle response = new Bundle();
 868         response.putString(AccountManager.KEY_ACCOUNT_NAME, mAccount.name);
 869         response.putString(AccountManager.KEY_ACCOUNT_TYPE, mAccount.type);
 870         boolean isOAuth = mOAuth2Check.isChecked();
 871         if (isOAuth) {
 872             response.putString(AccountManager.KEY_AUTHTOKEN, mOAuthAccessToken);
 873             // the next line is necessary; by now, notifications are calling directly to the AuthenticatorActivity to update, without AccountManager intervention
 874             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
 875         } else {
 876             response.putString(AccountManager.KEY_AUTHTOKEN, mPasswordInput.getText().toString());
 877             mAccountMgr.setPassword(mAccount, mPasswordInput.getText().toString());
 878         }
 879         setAccountAuthenticatorResult(response);
 880     }
 881
 882
 883     /**
 884      * Creates a new account through the Account Authenticator that started this activity.
 885      *
 886      * This makes the account permanent.
 887      *
 888      * TODO Decide how to name the OAuth accounts
 889      */
 890     private void createAccount() {
 891         /// create and save new ownCloud account
 892         boolean isOAuth = mOAuth2Check.isChecked();
 893
 894         Uri uri = Uri.parse(mHostBaseUrl);
 895         String username = mUsernameInput.getText().toString().trim();
 896         if (isOAuth) {
 897             username = "OAuth_user" + (new java.util.Random(System.currentTimeMillis())).nextLong();
 898         }
 899         String accountName = username + "@" + uri.getHost();
 900         if (uri.getPort() >= 0) {
 901             accountName += ":" + uri.getPort();
 902         }
 903         mAccount = new Account(accountName, AccountAuthenticator.ACCOUNT_TYPE);
 904         if (isOAuth) {
 905             mAccountMgr.addAccountExplicitly(mAccount, "", null);  // with our implementation, the password is never input in the app
 906         } else {
 907             mAccountMgr.addAccountExplicitly(mAccount, mPasswordInput.getText().toString(), null);
 908         }
 909
 910         /// add the new account as default in preferences, if there is none already
 911         Account defaultAccount = AccountUtils.getCurrentOwnCloudAccount(this);
 912         if (defaultAccount == null) {
 913             SharedPreferences.Editor editor = PreferenceManager
 914                     .getDefaultSharedPreferences(this).edit();
 915             editor.putString("select_oc_account", accountName);
 916             editor.commit();
 917         }
 918
 919         /// prepare result to return to the Authenticator
 920         //  TODO check again what the Authenticator makes with it; probably has the same effect as addAccountExplicitly, but it's not well done
 921         final Intent intent = new Intent();
 922         intent.putExtra(AccountManager.KEY_ACCOUNT_TYPE,    AccountAuthenticator.ACCOUNT_TYPE);
 923         intent.putExtra(AccountManager.KEY_ACCOUNT_NAME,    mAccount.name);
 924         if (!isOAuth)
 925             intent.putExtra(AccountManager.KEY_AUTHTOKEN,   AccountAuthenticator.ACCOUNT_TYPE); // TODO check this; not sure it's right; maybe
 926         intent.putExtra(AccountManager.KEY_USERDATA,        username);
 927         if (isOAuth) {
 928             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
 929         }
 930         /// add user data to the new account; TODO probably can be done in the last parameter addAccountExplicitly, or in KEY_USERDATA
 931         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_VERSION,    mDiscoveredVersion.toString());
 932         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_BASE_URL,   mHostBaseUrl);
 933         if (isOAuth)
 934             mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_SUPPORTS_OAUTH2, "TRUE");  // TODO this flag should be unnecessary
 935
 936         setAccountAuthenticatorResult(intent.getExtras());
 937         setResult(RESULT_OK, intent);
 938
 939         /// immediately request for the synchronization of the new account
 940         Bundle bundle = new Bundle();
 941         bundle.putBoolean(ContentResolver.SYNC_EXTRAS_MANUAL, true);
 942         ContentResolver.requestSync(mAccount, AccountAuthenticator.AUTHORITY, bundle);
 943     }
 944
 945
 946     /**
 947      * {@inheritDoc}
 948      *
 949      * Necessary to update the contents of the SSL Dialog
 950      *
 951      * TODO move to some common place for all possible untrusted SSL failures
 952      */
 953     @Override
 954     protected void onPrepareDialog(int id, Dialog dialog, Bundle args) {
 955         switch (id) {
 956         case DIALOG_LOGIN_PROGRESS:
 957         case DIALOG_CERT_NOT_SAVED:
 958         case DIALOG_OAUTH2_LOGIN_PROGRESS:
 959             break;
 960         case DIALOG_SSL_VALIDATOR: {
 961             ((SslValidatorDialog)dialog).updateResult(mLastSslUntrustedServerResult);
 962             break;
 963         }
 964         default:
 965             Log_OC.e(TAG, "Incorrect dialog called with id = " + id);
 966         }
 967     }
 968
 969
 970     /**
 971      * {@inheritDoc}
 972      */
 973     @Override
 974     protected Dialog onCreateDialog(int id) {
 975         Dialog dialog = null;
 976         switch (id) {
 977         case DIALOG_LOGIN_PROGRESS: {
 978             /// simple progress dialog
 979             ProgressDialog working_dialog = new ProgressDialog(this);
 980             working_dialog.setMessage(getResources().getString(R.string.auth_trying_to_login));
 981             working_dialog.setIndeterminate(true);
 982             working_dialog.setCancelable(true);
 983             working_dialog
 984                     .setOnCancelListener(new DialogInterface.OnCancelListener() {
 985                         @Override
 986                         public void onCancel(DialogInterface dialog) {
 987                             /// TODO study if this is enough
 988                             Log_OC.i(TAG, "Login canceled");
 989                             if (mOperationThread != null) {
 990                                 mOperationThread.interrupt();
 991                                 finish();
 992                             }
 993                         }
 994                     });
 995             dialog = working_dialog;
 996             break;
 997         }
 998         case DIALOG_OAUTH2_LOGIN_PROGRESS: {
 999             ProgressDialog working_dialog = new ProgressDialog(this);
1000             working_dialog.setMessage(String.format("Getting authorization"));
1001             working_dialog.setIndeterminate(true);
1002             working_dialog.setCancelable(true);
1003             working_dialog
1004             .setOnCancelListener(new DialogInterface.OnCancelListener() {
1005                 @Override
1006                 public void onCancel(DialogInterface dialog) {
1007                     Log_OC.i(TAG, "Login canceled");
1008                     finish();
1009                 }
1010             });
1011             dialog = working_dialog;
1012             break;
1013         }
1014         case DIALOG_SSL_VALIDATOR: {
1015             /// TODO start to use new dialog interface, at least for this (it is a FragmentDialog already)
1016             dialog = SslValidatorDialog.newInstance(this, mLastSslUntrustedServerResult, this);
1017             break;
1018         }
1019         case DIALOG_CERT_NOT_SAVED: {
1020             AlertDialog.Builder builder = new AlertDialog.Builder(this);
1021             builder.setMessage(getResources().getString(R.string.ssl_validator_not_saved));
1022             builder.setCancelable(false);
1023             builder.setPositiveButton(R.string.common_ok, new DialogInterface.OnClickListener() {
1024                     @Override
1025                     public void onClick(DialogInterface dialog, int which) {
1026                         dialog.dismiss();
1027                     };
1028                 });
1029             dialog = builder.create();
1030             break;
1031         }
1032         default:
1033             Log_OC.e(TAG, "Incorrect dialog called with id = " + id);
1034         }
1035         return dialog;
1036     }
1037
1038
1039     /**
1040      * Starts and activity to open the 'new account' page in the ownCloud web site
1041      *
1042      * @param view      'Account register' button
1043      */
1044     public void onRegisterClick(View view) {
1045         Intent register = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.url_account_register)));
1046         setResult(RESULT_CANCELED);
1047         startActivity(register);
1048     }
1049
1050
1051     /**
1052      * Updates the content and visibility state of the icon and text associated
1053      * to the last check on the ownCloud server.
1054      */
1055     private void showServerStatus() {
1056         TextView tv = (TextView) findViewById(R.id.server_status_text);
1057
1058         if (mServerStatusIcon == 0 && mServerStatusText == 0) {
1059             tv.setVisibility(View.INVISIBLE);
1060
1061         } else {
1062             tv.setText(mServerStatusText);
1063             tv.setCompoundDrawablesWithIntrinsicBounds(mServerStatusIcon, 0, 0, 0);
1064             tv.setVisibility(View.VISIBLE);
1065         }
1066
1067     }
1068
1069
1070     /**
1071      * Updates the content and visibility state of the icon and text associated
1072      * to the interactions with the OAuth authorization server.
1073      */
1074     private void showAuthStatus() {
1075         if (mAuthStatusIcon == 0 && mAuthStatusText == 0) {
1076             mAuthStatusLayout.setVisibility(View.INVISIBLE);
1077
1078         } else {
1079             mAuthStatusLayout.setText(mAuthStatusText);
1080             mAuthStatusLayout.setCompoundDrawablesWithIntrinsicBounds(mAuthStatusIcon, 0, 0, 0);
1081             mAuthStatusLayout.setVisibility(View.VISIBLE);
1082         }
1083     }
1084
1085
1086     private void showRefreshButton() {
1087         mHostUrlInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_action_refresh_black, 0);
1088     }
1089
1090     private void hideRefreshButton() {
1091         mHostUrlInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0);
1092     }
1093
1094     /**
1095      * Called when the refresh button in the input field for ownCloud host is clicked.
1096      *
1097      * Performs a new check on the URL in the input field.
1098      *
1099      * @param view      Refresh 'button'
1100      */
1101     public void onRefreshClick(View view) {
1102         checkOcServer();
1103     }
1104
1105
1106     /**
1107      * Called when the eye icon in the password field is clicked.
1108      *
1109      * Toggles the visibility of the password in the field.
1110      *
1111      * @param view      'View password' 'button'
1112      */
1113     public void onViewPasswordClick(View view) {
1114         int selectionStart = mPasswordInput.getSelectionStart();
1115         int selectionEnd = mPasswordInput.getSelectionEnd();
1116         int input_type = mPasswordInput.getInputType();
1117         if ((input_type & InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD) == InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD) {
1118             input_type = InputType.TYPE_CLASS_TEXT
1119                     | InputType.TYPE_TEXT_VARIATION_PASSWORD;
1120         } else {
1121             input_type = InputType.TYPE_CLASS_TEXT
1122                     | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD;
1123         }
1124         mPasswordInput.setInputType(input_type);
1125         mPasswordInput.setSelection(selectionStart, selectionEnd);
1126     }
1127
1128
1129     /**
1130      * Called when the checkbox for OAuth authorization is clicked.
1131      *
1132      * Hides or shows the input fields for user & password.
1133      *
1134      * @param view      'View password' 'button'
1135      */
1136     public void onCheckClick(View view) {
1137         CheckBox oAuth2Check = (CheckBox)view;
1138         changeViewByOAuth2Check(oAuth2Check.isChecked());
1139
1140     }
1141
1142     /**
1143      * Changes the visibility of input elements depending upon the kind of authorization
1144      * chosen by the user: basic or OAuth
1145      *
1146      * @param checked       'True' when OAuth is selected.
1147      */
1148     public void changeViewByOAuth2Check(Boolean checked) {
1149
1150         if (checked) {
1151             mOAuthAuthEndpointText.setVisibility(View.VISIBLE);
1152             mOAuthTokenEndpointText.setVisibility(View.VISIBLE);
1153             mUsernameInput.setVisibility(View.GONE);
1154             mPasswordInput.setVisibility(View.GONE);
1155             mViewPasswordButton.setVisibility(View.GONE);
1156         } else {
1157             mOAuthAuthEndpointText.setVisibility(View.GONE);
1158             mOAuthTokenEndpointText.setVisibility(View.GONE);
1159             mUsernameInput.setVisibility(View.VISIBLE);
1160             mPasswordInput.setVisibility(View.VISIBLE);
1161             mViewPasswordButton.setVisibility(View.INVISIBLE);
1162         }
1163
1164     }
1165
1166     /**
1167      * Called from SslValidatorDialog when a new server certificate was correctly saved.
1168      */
1169     public void onSavedCertificate() {
1170         mOperationThread = mOcServerChkOperation.retry(this, mHandler);
1171     }
1172
1173     /**
1174      * Called from SslValidatorDialog when a new server certificate could not be saved
1175      * when the user requested it.
1176      */
1177     @Override
1178     public void onFailedSavingCertificate() {
1179         showDialog(DIALOG_CERT_NOT_SAVED);
1180     }
1181
1182
1183     /**
1184      *  Called when the 'action' button in an IME is pressed ('enter' in software keyboard).
1185      *
1186      *  Used to trigger the authorization check when the user presses 'enter' after writing the password.
1187      */
1188     @Override
1189     public boolean onEditorAction(TextView inputField, int actionId, KeyEvent event) {
1190         if (inputField != null && inputField.equals(mPasswordInput) &&
1191                 actionId == EditorInfo.IME_ACTION_DONE) {
1192             if (mOkButton.isEnabled()) {
1193                 mOkButton.performClick();
1194             }
1195         }
1196         return false;   // always return false to grant that the software keyboard is hidden anyway
1197     }
1198
1199
1200     private abstract static class RightDrawableOnTouchListener implements OnTouchListener  {
1201
1202         private int fuzz = 10;
1203
1204         /**
1205          * {@inheritDoc}
1206          */
1207         @Override
1208         public boolean onTouch(View view, MotionEvent event) {
1209             if (event.getAction() == MotionEvent.ACTION_DOWN) {
1210                 Drawable rightDrawable = null;
1211                 if (view instanceof TextView) {
1212                     Drawable[] drawables = ((TextView)view).getCompoundDrawables();
1213                     if (drawables.length > 2) {
1214                         rightDrawable = drawables[2];
1215                     }
1216                 }
1217                 if (rightDrawable != null) {
1218                     final int x = (int) event.getX();
1219                     final int y = (int) event.getY();
1220                     final Rect bounds = rightDrawable.getBounds();
1221                     if (x >= (view.getRight() - bounds.width() - fuzz) && x <= (view.getRight() - view.getPaddingRight() + fuzz)
1222                         && y >= (view.getPaddingTop() - fuzz) && y <= (view.getHeight() - view.getPaddingBottom()) + fuzz) {
1223
1224                         return onDrawableTouch(event);
1225                     }
1226                 }
1227             }
1228             return false;
1229         }
1230
1231         public abstract boolean onDrawableTouch(final MotionEvent event);
1232     }
1233
1234
1235     private class HostUrlWatcher implements TextWatcher {
1236
1237         @Override
1238         public void afterTextChanged(Editable s) {
1239         }
1240
1241         @Override
1242         public void beforeTextChanged(CharSequence s, int start, int count, int after) {
1243         }
1244
1245         @Override
1246         public void onTextChanged(CharSequence s, int start, int before, int count) {
1247             if (mServerCheckedAndValid) {
1248                 mServerCheckedAndValid = false;
1249                 mOkButton.setEnabled(false);    // avoids that the 'connect' button can be clicked if the test was previously passed
1250             }
1251         }
1252
1253     }
1254 }