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         if (uri.length() != 0) {
 418             mServerCheckedAndValid = false;
 419             mOkButton.setEnabled(false);
 420             mServerStatusText = R.string.auth_testing_connection;
 421             mServerStatusIcon = R.drawable.progress_small;
 422             showServerStatus();
 423             mOcServerChkOperation = new  OwnCloudServerCheckOperation(uri, this);
 424             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(uri), this);
 425             mDiscoveredVersion = null;
 426             mOperationThread = mOcServerChkOperation.execute(client, this, mHandler);
 427         } else {
 428             mHostUrlInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0);
 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         mServerStatusIcon = R.drawable.progress_small;
 538         mServerStatusText = 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             updateStatusIconAndText(result);
 594             showServerStatus();
 595
 596             /// very special case (TODO: move to a common place for all the remote operations)
 597             if (result.getCode() == ResultCode.SSL_RECOVERABLE_PEER_UNVERIFIED) {
 598                 mLastSslUntrustedServerResult = result;
 599                 showDialog(DIALOG_SSL_VALIDATOR);
 600             }
 601
 602             /// update the visibility of the 'retry connection' button
 603             if (!mServerCheckedAndValid) {
 604                 mHostUrlInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_action_refresh_black, 0);
 605             } else {
 606                 mHostUrlInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0);
 607             }
 608
 609             /// retrieve discovered version and normalize server URL
 610             mDiscoveredVersion = operation.getDiscoveredVersion();
 611             mHostBaseUrl = normalizeUrl(mHostUrlInput.getText().toString());
 612
 613             /// allow or not the user try to access the server
 614             mOkButton.setEnabled(mServerCheckedAndValid);
 615
 616         }   // else nothing ; only the last check operation is considered;
 617             // multiple can be triggered if the user amends a URL before a previous check can be triggered
 618     }
 619
 620
 621     private String normalizeUrl(String url) {
 622         if (url != null && url.length() > 0) {
 623             url = url.trim();
 624             if (!url.toLowerCase().startsWith("http://") &&
 625                     !url.toLowerCase().startsWith("https://")) {
 626                 if (mIsSslConn) {
 627                     url = "https://" + url;
 628                 } else {
 629                     url = "http://" + url;
 630                 }
 631
 632             }
 633             if (url.endsWith("/")) {
 634                 url = url.substring(0, url.length() - 1);
 635             }
 636         }
 637         return url;
 638     }
 639
 640     /**
 641      * Chooses the right icon and text to show to the user for the received operation result.
 642      *
 643      * @param result    Result of a remote operation performed in this activity
 644      */
 645     private void updateStatusIconAndText(RemoteOperationResult result) {
 646         mServerStatusText = mServerStatusIcon = 0;
 647
 648         switch (result.getCode()) {
 649         case OK_SSL:
 650             mServerStatusIcon = android.R.drawable.ic_secure;
 651             mServerStatusText = R.string.auth_secure_connection;
 652             break;
 653
 654         case OK_NO_SSL:
 655         case OK:
 656             if (mHostUrlInput.getText().toString().trim().toLowerCase().startsWith("http://") ) {
 657                 mServerStatusText = R.string.auth_connection_established;
 658                 mServerStatusIcon = R.drawable.ic_ok;
 659             } else {
 660                 mServerStatusText = R.string.auth_nossl_plain_ok_title;
 661                 mServerStatusIcon = android.R.drawable.ic_partial_secure;
 662             }
 663             break;
 664
 665         case SSL_RECOVERABLE_PEER_UNVERIFIED:
 666             mServerStatusIcon = R.drawable.common_error;
 667             mServerStatusText = R.string.auth_ssl_unverified_server_title;
 668             break;
 669
 670         case BAD_OC_VERSION:
 671             mServerStatusIcon = R.drawable.common_error;
 672             mServerStatusText = R.string.auth_bad_oc_version_title;
 673             break;
 674         case WRONG_CONNECTION:
 675             mServerStatusIcon = R.drawable.common_error;
 676             mServerStatusText = R.string.auth_wrong_connection_title;
 677             break;
 678         case TIMEOUT:
 679             mServerStatusIcon = R.drawable.common_error;
 680             mServerStatusText = R.string.auth_timeout_title;
 681             break;
 682         case INCORRECT_ADDRESS:
 683             mServerStatusIcon = R.drawable.common_error;
 684             mServerStatusText = R.string.auth_incorrect_address_title;
 685             break;
 686
 687         case SSL_ERROR:
 688             mServerStatusIcon = R.drawable.common_error;
 689             mServerStatusText = R.string.auth_ssl_general_error_title;
 690             break;
 691
 692         case UNAUTHORIZED:
 693             mServerStatusIcon = R.drawable.common_error;
 694             mServerStatusText = R.string.auth_unauthorized;
 695             break;
 696         case HOST_NOT_AVAILABLE:
 697             mServerStatusIcon = R.drawable.common_error;
 698             mServerStatusText = R.string.auth_unknown_host_title;
 699             break;
 700         case NO_NETWORK_CONNECTION:
 701             mServerStatusIcon = R.drawable.no_network;
 702             mServerStatusText = R.string.auth_no_net_conn_title;
 703             break;
 704         case INSTANCE_NOT_CONFIGURED:
 705             mServerStatusIcon = R.drawable.common_error;
 706             mServerStatusText = R.string.auth_not_configured_title;
 707             break;
 708         case FILE_NOT_FOUND:
 709             mServerStatusIcon = R.drawable.common_error;
 710             mServerStatusText = R.string.auth_incorrect_path_title;
 711             break;
 712         case OAUTH2_ERROR:
 713             mServerStatusIcon = R.drawable.common_error;
 714             mServerStatusText = R.string.auth_oauth_error;
 715             break;
 716         case OAUTH2_ERROR_ACCESS_DENIED:
 717             mServerStatusIcon = R.drawable.common_error;
 718             mServerStatusText = R.string.auth_oauth_error_access_denied;
 719             break;
 720         case UNHANDLED_HTTP_CODE:
 721         case UNKNOWN_ERROR:
 722             mServerStatusIcon = R.drawable.common_error;
 723             mServerStatusText = R.string.auth_unknown_error_title;
 724             break;
 725
 726         default:
 727             break;
 728         }
 729     }
 730
 731
 732     /**
 733      * Processes the result of the request for and access token send
 734      * to an OAuth authorization server.
 735      *
 736      * @param operation     Operation performed requesting the access token.
 737      * @param result        Result of the operation.
 738      */
 739     private void onGetOAuthAccessTokenFinish(OAuth2GetAccessToken operation, RemoteOperationResult result) {
 740         try {
 741             dismissDialog(DIALOG_OAUTH2_LOGIN_PROGRESS);
 742         } catch (IllegalArgumentException e) {
 743             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 744         }
 745
 746         String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, true);
 747         if (result.isSuccess() && webdav_path != null) {
 748             /// be gentle with the user
 749             showDialog(DIALOG_LOGIN_PROGRESS);
 750
 751             /// time to test the retrieved access token on the ownCloud server
 752             mOAuthAccessToken = ((OAuth2GetAccessToken)operation).getResultTokenMap().get(OAuth2Constants.KEY_ACCESS_TOKEN);
 753             Log_OC.d(TAG, "Got ACCESS TOKEN: " + mOAuthAccessToken);
 754             mAuthCheckOperation = new ExistenceCheckOperation("", this, false);
 755             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this);
 756             client.setBearerCredentials(mOAuthAccessToken);
 757             mAuthCheckOperation.execute(client, this, mHandler);
 758
 759         } else {
 760             updateStatusIconAndText(result);
 761             showAuthStatus();
 762             Log_OC.d(TAG, "Access failed: " + result.getLogMessage());
 763         }
 764     }
 765
 766
 767     /**
 768      * Processes the result of the access check performed to try the user credentials.
 769      *
 770      * Creates a new account through the AccountManager.
 771      *
 772      * @param operation     Access check performed.
 773      * @param result        Result of the operation.
 774      */
 775     private void onAuthorizationCheckFinish(ExistenceCheckOperation operation, RemoteOperationResult result) {
 776         try {
 777             dismissDialog(DIALOG_LOGIN_PROGRESS);
 778         } catch (IllegalArgumentException e) {
 779             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 780         }
 781
 782         if (result.isSuccess()) {
 783             Log_OC.d(TAG, "Successful access - time to save the account");
 784
 785             if (mAction == ACTION_CREATE) {
 786                 createAccount();
 787
 788             } else {
 789                 updateToken();
 790             }
 791
 792             finish();
 793
 794         } else {
 795             updateStatusIconAndText(result);
 796             showAuthStatus();
 797             Log_OC.d(TAG, "Access failed: " + result.getLogMessage());
 798         }
 799     }
 800
 801
 802     /**
 803      * Sets the proper response to get that the Account Authenticator that started this activity saves
 804      * a new authorization token for mAccount.
 805      */
 806     private void updateToken() {
 807         Bundle response = new Bundle();
 808         response.putString(AccountManager.KEY_ACCOUNT_NAME, mAccount.name);
 809         response.putString(AccountManager.KEY_ACCOUNT_TYPE, mAccount.type);
 810         boolean isOAuth = mOAuth2Check.isChecked();
 811         if (isOAuth) {
 812             response.putString(AccountManager.KEY_AUTHTOKEN, mOAuthAccessToken);
 813             // the next line is necessary; by now, notifications are calling directly to the AuthenticatorActivity to update, without AccountManager intervention
 814             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
 815         } else {
 816             response.putString(AccountManager.KEY_AUTHTOKEN, mPasswordInput.getText().toString());
 817             mAccountMgr.setPassword(mAccount, mPasswordInput.getText().toString());
 818         }
 819         setAccountAuthenticatorResult(response);
 820     }
 821
 822
 823     /**
 824      * Creates a new account through the Account Authenticator that started this activity.
 825      *
 826      * This makes the account permanent.
 827      *
 828      * TODO Decide how to name the OAuth accounts
 829      */
 830     private void createAccount() {
 831         /// create and save new ownCloud account
 832         boolean isOAuth = mOAuth2Check.isChecked();
 833
 834         Uri uri = Uri.parse(mHostBaseUrl);
 835         String username = mUsernameInput.getText().toString().trim();
 836         if (isOAuth) {
 837             username = "OAuth_user" + (new java.util.Random(System.currentTimeMillis())).nextLong();
 838         }
 839         String accountName = username + "@" + uri.getHost();
 840         if (uri.getPort() >= 0) {
 841             accountName += ":" + uri.getPort();
 842         }
 843         mAccount = new Account(accountName, AccountAuthenticator.ACCOUNT_TYPE);
 844         if (isOAuth) {
 845             mAccountMgr.addAccountExplicitly(mAccount, "", null);  // with our implementation, the password is never input in the app
 846         } else {
 847             mAccountMgr.addAccountExplicitly(mAccount, mPasswordInput.getText().toString(), null);
 848         }
 849
 850         /// add the new account as default in preferences, if there is none already
 851         Account defaultAccount = AccountUtils.getCurrentOwnCloudAccount(this);
 852         if (defaultAccount == null) {
 853             SharedPreferences.Editor editor = PreferenceManager
 854                     .getDefaultSharedPreferences(this).edit();
 855             editor.putString("select_oc_account", accountName);
 856             editor.commit();
 857         }
 858
 859         /// prepare result to return to the Authenticator
 860         //  TODO check again what the Authenticator makes with it; probably has the same effect as addAccountExplicitly, but it's not well done
 861         final Intent intent = new Intent();
 862         intent.putExtra(AccountManager.KEY_ACCOUNT_TYPE,    AccountAuthenticator.ACCOUNT_TYPE);
 863         intent.putExtra(AccountManager.KEY_ACCOUNT_NAME,    mAccount.name);
 864         if (!isOAuth)
 865             intent.putExtra(AccountManager.KEY_AUTHTOKEN,   AccountAuthenticator.ACCOUNT_TYPE); // TODO check this; not sure it's right; maybe
 866         intent.putExtra(AccountManager.KEY_USERDATA,        username);
 867         if (isOAuth) {
 868             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
 869         }
 870         /// add user data to the new account; TODO probably can be done in the last parameter addAccountExplicitly, or in KEY_USERDATA
 871         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_VERSION,    mDiscoveredVersion.toString());
 872         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_BASE_URL,   mHostBaseUrl);
 873         if (isOAuth)
 874             mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_SUPPORTS_OAUTH2, "TRUE");  // TODO this flag should be unnecessary
 875
 876         setAccountAuthenticatorResult(intent.getExtras());
 877         setResult(RESULT_OK, intent);
 878
 879         /// immediately request for the synchronization of the new account
 880         Bundle bundle = new Bundle();
 881         bundle.putBoolean(ContentResolver.SYNC_EXTRAS_MANUAL, true);
 882         ContentResolver.requestSync(mAccount, AccountAuthenticator.AUTHORITY, bundle);
 883     }
 884
 885
 886     /**
 887      * {@inheritDoc}
 888      *
 889      * Necessary to update the contents of the SSL Dialog
 890      *
 891      * TODO move to some common place for all possible untrusted SSL failures
 892      */
 893     @Override
 894     protected void onPrepareDialog(int id, Dialog dialog, Bundle args) {
 895         switch (id) {
 896         case DIALOG_LOGIN_PROGRESS:
 897         case DIALOG_CERT_NOT_SAVED:
 898         case DIALOG_OAUTH2_LOGIN_PROGRESS:
 899             break;
 900         case DIALOG_SSL_VALIDATOR: {
 901             ((SslValidatorDialog)dialog).updateResult(mLastSslUntrustedServerResult);
 902             break;
 903         }
 904         default:
 905             Log_OC.e(TAG, "Incorrect dialog called with id = " + id);
 906         }
 907     }
 908
 909
 910     /**
 911      * {@inheritDoc}
 912      */
 913     @Override
 914     protected Dialog onCreateDialog(int id) {
 915         Dialog dialog = null;
 916         switch (id) {
 917         case DIALOG_LOGIN_PROGRESS: {
 918             /// simple progress dialog
 919             ProgressDialog working_dialog = new ProgressDialog(this);
 920             working_dialog.setMessage(getResources().getString(R.string.auth_trying_to_login));
 921             working_dialog.setIndeterminate(true);
 922             working_dialog.setCancelable(true);
 923             working_dialog
 924                     .setOnCancelListener(new DialogInterface.OnCancelListener() {
 925                         @Override
 926                         public void onCancel(DialogInterface dialog) {
 927                             /// TODO study if this is enough
 928                             Log_OC.i(TAG, "Login canceled");
 929                             if (mOperationThread != null) {
 930                                 mOperationThread.interrupt();
 931                                 finish();
 932                             }
 933                         }
 934                     });
 935             dialog = working_dialog;
 936             break;
 937         }
 938         case DIALOG_OAUTH2_LOGIN_PROGRESS: {
 939             ProgressDialog working_dialog = new ProgressDialog(this);
 940             working_dialog.setMessage(String.format("Getting authorization"));
 941             working_dialog.setIndeterminate(true);
 942             working_dialog.setCancelable(true);
 943             working_dialog
 944             .setOnCancelListener(new DialogInterface.OnCancelListener() {
 945                 @Override
 946                 public void onCancel(DialogInterface dialog) {
 947                     Log_OC.i(TAG, "Login canceled");
 948                     finish();
 949                 }
 950             });
 951             dialog = working_dialog;
 952             break;
 953         }
 954         case DIALOG_SSL_VALIDATOR: {
 955             /// TODO start to use new dialog interface, at least for this (it is a FragmentDialog already)
 956             dialog = SslValidatorDialog.newInstance(this, mLastSslUntrustedServerResult, this);
 957             break;
 958         }
 959         case DIALOG_CERT_NOT_SAVED: {
 960             AlertDialog.Builder builder = new AlertDialog.Builder(this);
 961             builder.setMessage(getResources().getString(R.string.ssl_validator_not_saved));
 962             builder.setCancelable(false);
 963             builder.setPositiveButton(R.string.common_ok, new DialogInterface.OnClickListener() {
 964                     @Override
 965                     public void onClick(DialogInterface dialog, int which) {
 966                         dialog.dismiss();
 967                     };
 968                 });
 969             dialog = builder.create();
 970             break;
 971         }
 972         default:
 973             Log_OC.e(TAG, "Incorrect dialog called with id = " + id);
 974         }
 975         return dialog;
 976     }
 977
 978
 979     /**
 980      * Starts and activity to open the 'new account' page in the ownCloud web site
 981      *
 982      * @param view      'Account register' button
 983      */
 984     public void onRegisterClick(View view) {
 985         Intent register = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.url_account_register)));
 986         setResult(RESULT_CANCELED);
 987         startActivity(register);
 988     }
 989
 990
 991     /**
 992      * Updates the content and visibility state of the icon and text associated
 993      * to the last check on the ownCloud server.
 994      */
 995     private void showServerStatus() {
 996         TextView tv = (TextView) findViewById(R.id.server_status_text);
 997
 998         if (mServerStatusIcon == 0 && mServerStatusText == 0) {
 999             tv.setVisibility(View.INVISIBLE);
1000         } else {
1001             tv.setText(mServerStatusText);
1002             tv.setCompoundDrawablesWithIntrinsicBounds(mServerStatusIcon, 0, 0, 0);
1003             tv.setVisibility(View.VISIBLE);
1004         }
1005     }
1006
1007
1008     /**
1009      * Updates the content and visibility state of the icon and text associated
1010      * to the interactions with the OAuth authorization server.
1011      */
1012     private void showAuthStatus() {
1013         if (mAuthStatusIcon == 0 && mAuthStatusText == 0) {
1014             mAuthStatusLayout.setVisibility(View.INVISIBLE);
1015         } else {
1016             mAuthStatusLayout.setText(mAuthStatusText);
1017             mAuthStatusLayout.setCompoundDrawablesWithIntrinsicBounds(mAuthStatusIcon, 0, 0, 0);
1018             mAuthStatusLayout.setVisibility(View.VISIBLE);
1019         }
1020     }
1021
1022
1023     /**
1024      * Called when the refresh button in the input field for ownCloud host is clicked.
1025      *
1026      * Performs a new check on the URL in the input field.
1027      *
1028      * @param view      Refresh 'button'
1029      */
1030     public void onRefreshClick(View view) {
1031         onFocusChange(mHostUrlInput, false);
1032     }
1033
1034
1035     /**
1036      * Called when the eye icon in the password field is clicked.
1037      *
1038      * Toggles the visibility of the password in the field.
1039      *
1040      * @param view      'View password' 'button'
1041      */
1042     public void onViewPasswordClick(View view) {
1043         int selectionStart = mPasswordInput.getSelectionStart();
1044         int selectionEnd = mPasswordInput.getSelectionEnd();
1045         int input_type = mPasswordInput.getInputType();
1046         if ((input_type & InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD) == InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD) {
1047             input_type = InputType.TYPE_CLASS_TEXT
1048                     | InputType.TYPE_TEXT_VARIATION_PASSWORD;
1049         } else {
1050             input_type = InputType.TYPE_CLASS_TEXT
1051                     | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD;
1052         }
1053         mPasswordInput.setInputType(input_type);
1054         mPasswordInput.setSelection(selectionStart, selectionEnd);
1055     }
1056
1057
1058     /**
1059      * Called when the checkbox for OAuth authorization is clicked.
1060      *
1061      * Hides or shows the input fields for user & password.
1062      *
1063      * @param view      'View password' 'button'
1064      */
1065     public void onCheckClick(View view) {
1066         CheckBox oAuth2Check = (CheckBox)view;
1067         changeViewByOAuth2Check(oAuth2Check.isChecked());
1068
1069     }
1070
1071     /**
1072      * Changes the visibility of input elements depending upon the kind of authorization
1073      * chosen by the user: basic or OAuth
1074      *
1075      * @param checked       'True' when OAuth is selected.
1076      */
1077     public void changeViewByOAuth2Check(Boolean checked) {
1078
1079         if (checked) {
1080             mOAuthAuthEndpointText.setVisibility(View.VISIBLE);
1081             mOAuthTokenEndpointText.setVisibility(View.VISIBLE);
1082             mUsernameInput.setVisibility(View.GONE);
1083             mPasswordInput.setVisibility(View.GONE);
1084             mViewPasswordButton.setVisibility(View.GONE);
1085         } else {
1086             mOAuthAuthEndpointText.setVisibility(View.GONE);
1087             mOAuthTokenEndpointText.setVisibility(View.GONE);
1088             mUsernameInput.setVisibility(View.VISIBLE);
1089             mPasswordInput.setVisibility(View.VISIBLE);
1090             mViewPasswordButton.setVisibility(View.INVISIBLE);
1091         }
1092
1093     }
1094
1095     /**
1096      * Called from SslValidatorDialog when a new server certificate was correctly saved.
1097      */
1098     public void onSavedCertificate() {
1099         mOperationThread = mOcServerChkOperation.retry(this, mHandler);
1100     }
1101
1102     /**
1103      * Called from SslValidatorDialog when a new server certificate could not be saved
1104      * when the user requested it.
1105      */
1106     @Override
1107     public void onFailedSavingCertificate() {
1108         showDialog(DIALOG_CERT_NOT_SAVED);
1109     }
1110
1111
1112     /**
1113      *  Called when the 'action' button in an IME is pressed ('enter' in software keyboard).
1114      *
1115      *  Used to trigger the authorization check when the user presses 'enter' after writing the password.
1116      */
1117     @Override
1118     public boolean onEditorAction(TextView inputField, int actionId, KeyEvent event) {
1119         if (inputField != null && inputField.equals(mPasswordInput) &&
1120                 actionId == EditorInfo.IME_ACTION_DONE) {
1121             if (mOkButton.isEnabled()) {
1122                 mOkButton.performClick();
1123             }
1124         }
1125         return false;   // always return false to grant that the software keyboard is hidden anyway
1126     }
1127
1128
1129     private abstract static class RightDrawableOnTouchListener implements OnTouchListener  {
1130
1131         private int fuzz = 10;
1132
1133         /**
1134          * {@inheritDoc}
1135          */
1136         @Override
1137         public boolean onTouch(View view, MotionEvent event) {
1138             if (event.getAction() == MotionEvent.ACTION_DOWN) {
1139                 Drawable rightDrawable = null;
1140                 if (view instanceof TextView) {
1141                     Drawable[] drawables = ((TextView)view).getCompoundDrawables();
1142                     if (drawables.length > 2) {
1143                         rightDrawable = drawables[2];
1144                     }
1145                 }
1146                 if (rightDrawable != null) {
1147                     final int x = (int) event.getX();
1148                     final int y = (int) event.getY();
1149                     final Rect bounds = rightDrawable.getBounds();
1150                     if (x >= (view.getRight() - bounds.width() - fuzz) && x <= (view.getRight() - view.getPaddingRight() + fuzz)
1151                         && y >= (view.getPaddingTop() - fuzz) && y <= (view.getHeight() - view.getPaddingBottom()) + fuzz) {
1152
1153                         return onDrawableTouch(event);
1154                     }
1155                 }
1156             }
1157             return false;
1158         }
1159
1160         public abstract boolean onDrawableTouch(final MotionEvent event);
1161     }
1162
1163
1164     private class HostUrlWatcher implements TextWatcher {
1165
1166         @Override
1167         public void afterTextChanged(Editable s) {
1168         }
1169
1170         @Override
1171         public void beforeTextChanged(CharSequence s, int start, int count, int after) {
1172         }
1173
1174         @Override
1175         public void onTextChanged(CharSequence s, int start, int before, int count) {
1176             if (mServerCheckedAndValid) {
1177                 mServerCheckedAndValid = false;
1178                 mOkButton.setEnabled(false);    // avoids that the 'connect' button can be clicked if the test was previously passed
1179             }
1180         }
1181
1182     }
1183 }