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

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012  Bartek Przybylski
   3  *   Copyright (C) 2012-2013 ownCloud Inc.
   4  *
   5  *   This program is free software: you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License version 2,
   7  *   as published by the Free Software Foundation.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18
  19 package com.owncloud.android.authentication;
  20
  21 import com.owncloud.android.AccountUtils;
  22 import com.owncloud.android.Log_OC;
  23 import com.owncloud.android.ui.dialog.SslValidatorDialog;
  24 import com.owncloud.android.ui.dialog.SslValidatorDialog.OnSslValidatorListener;
  25 import com.owncloud.android.utils.OwnCloudVersion;
  26 import com.owncloud.android.network.OwnCloudClientUtils;
  27 import com.owncloud.android.operations.OwnCloudServerCheckOperation;
  28 import com.owncloud.android.operations.ExistenceCheckOperation;
  29 import com.owncloud.android.operations.OAuth2GetAccessToken;
  30 import com.owncloud.android.operations.OnRemoteOperationListener;
  31 import com.owncloud.android.operations.RemoteOperation;
  32 import com.owncloud.android.operations.RemoteOperationResult;
  33 import com.owncloud.android.operations.RemoteOperationResult.ResultCode;
  34
  35 import android.accounts.Account;
  36 import android.accounts.AccountAuthenticatorActivity;
  37 import android.accounts.AccountManager;
  38 import android.app.AlertDialog;
  39 import android.app.Dialog;
  40 import android.app.ProgressDialog;
  41 import android.content.ContentResolver;
  42 import android.content.DialogInterface;
  43 import android.content.Intent;
  44 import android.content.SharedPreferences;
  45 import android.graphics.Rect;
  46 import android.graphics.drawable.Drawable;
  47 import android.net.Uri;
  48 import android.os.Bundle;
  49 import android.os.Handler;
  50 import android.preference.PreferenceManager;
  51 import android.text.Editable;
  52 import android.text.InputType;
  53 import android.text.TextWatcher;
  54 import android.view.KeyEvent;
  55 import android.view.MotionEvent;
  56 import android.view.View;
  57 import android.view.View.OnFocusChangeListener;
  58 import android.view.View.OnTouchListener;
  59 import android.view.Window;
  60 import android.view.inputmethod.EditorInfo;
  61 import android.widget.CheckBox;
  62 import android.widget.EditText;
  63 import android.widget.Button;
  64 import android.widget.ImageView;
  65 import android.widget.TextView;
  66 import android.widget.Toast;
  67 import android.widget.TextView.OnEditorActionListener;
  68
  69 import com.owncloud.android.R;
  70
  71 import eu.alefzero.webdav.WebdavClient;
  72
  73 /**
  74  * This Activity is used to add an ownCloud account to the App
  75  *
  76  * @author Bartek Przybylski
  77  * @author David A. Velasco
  78  */
  79 public class AuthenticatorActivity extends AccountAuthenticatorActivity
  80         implements  OnRemoteOperationListener, OnSslValidatorListener, OnFocusChangeListener, OnEditorActionListener {
  81
  82     private static final String TAG = AuthenticatorActivity.class.getSimpleName();
  83
  84     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  85     public static final String EXTRA_USER_NAME = "USER_NAME";
  86     public static final String EXTRA_HOST_NAME = "HOST_NAME";
  87     public static final String EXTRA_ACTION = "ACTION";
  88
  89     private static final String KEY_HOST_URL_TEXT = "HOST_URL_TEXT";
  90     private static final String KEY_OC_VERSION = "OC_VERSION";
  91     private static final String KEY_ACCOUNT = "ACCOUNT";
  92     private static final String KEY_SERVER_VALID = "SERVER_VALID";
  93     private static final String KEY_SERVER_CHECKED = "SERVER_CHECKED";
  94     private static final String KEY_SERVER_CHECK_IN_PROGRESS = "SERVER_CHECK_IN_PROGRESS";
  95     private static final String KEY_SERVER_STATUS_TEXT = "SERVER_STATUS_TEXT";
  96     private static final String KEY_SERVER_STATUS_ICON = "SERVER_STATUS_ICON";
  97     private static final String KEY_IS_SSL_CONN = "IS_SSL_CONN";
  98     private static final String KEY_AUTH_STATUS_TEXT = "AUTH_STATUS_TEXT";
  99     private static final String KEY_AUTH_STATUS_ICON = "AUTH_STATUS_ICON";
 100
 101     private static final String OAUTH_MODE_ON = "on";
 102     private static final String OAUTH_MODE_OFF = "off";
 103     private static final String OAUTH_MODE_OPTIONAL = "optional";
 104
 105     private static final int DIALOG_LOGIN_PROGRESS = 0;
 106     private static final int DIALOG_SSL_VALIDATOR = 1;
 107     private static final int DIALOG_CERT_NOT_SAVED = 2;
 108     private static final int DIALOG_OAUTH2_LOGIN_PROGRESS = 3;
 109
 110     public static final byte ACTION_CREATE = 0;
 111     public static final byte ACTION_UPDATE_TOKEN = 1;
 112
 113
 114     private String mHostBaseUrl;
 115     private OwnCloudVersion mDiscoveredVersion;
 116
 117     private int mServerStatusText, mServerStatusIcon;
 118     private boolean mServerIsChecked, mServerIsValid, mIsSslConn;
 119     private int mAuthStatusText, mAuthStatusIcon;
 120
 121     private final Handler mHandler = new Handler();
 122     private Thread mOperationThread;
 123     private OwnCloudServerCheckOperation mOcServerChkOperation;
 124     private ExistenceCheckOperation mAuthCheckOperation;
 125     private RemoteOperationResult mLastSslUntrustedServerResult;
 126
 127     private Uri mNewCapturedUriFromOAuth2Redirection;
 128
 129     private AccountManager mAccountMgr;
 130     private boolean mJustCreated;
 131     private byte mAction;
 132     private Account mAccount;
 133
 134     private ImageView mViewPasswordButton;
 135     private EditText mHostUrlInput;
 136     private EditText mUsernameInput;
 137     private EditText mPasswordInput;
 138     private CheckBox mOAuth2Check;
 139     private String mOAuthAccessToken;
 140     private View mOkButton;
 141     private TextView mAuthStatusLayout;
 142
 143     private TextView mOAuthAuthEndpointText;
 144     private TextView mOAuthTokenEndpointText;
 145
 146
 147     /**
 148      * {@inheritDoc}
 149      *
 150      * IMPORTANT ENTRY POINT 1: activity is shown to the user
 151      */
 152     @Override
 153     protected void onCreate(Bundle savedInstanceState) {
 154         super.onCreate(savedInstanceState);
 155         getWindow().requestFeature(Window.FEATURE_NO_TITLE);
 156
 157         /// set view and get references to view elements
 158         setContentView(R.layout.account_setup);
 159         mViewPasswordButton = (ImageView) findViewById(R.id.viewPasswordButton);
 160         mHostUrlInput = (EditText) findViewById(R.id.hostUrlInput);
 161         mUsernameInput = (EditText) findViewById(R.id.account_username);
 162         mPasswordInput = (EditText) findViewById(R.id.account_password);
 163         mOAuthAuthEndpointText = (TextView)findViewById(R.id.oAuthEntryPoint_1);
 164         mOAuthTokenEndpointText = (TextView)findViewById(R.id.oAuthEntryPoint_2);
 165         mOAuth2Check = (CheckBox) findViewById(R.id.oauth_onOff_check);
 166         mOkButton = findViewById(R.id.buttonOK);
 167         mAuthStatusLayout = (TextView) findViewById(R.id.auth_status_text);
 168
 169         /// complete label for 'register account' button
 170         Button b = (Button) findViewById(R.id.account_register);
 171         if (b != null) {
 172             b.setText(String.format(getString(R.string.auth_register), getString(R.string.app_name)));
 173         }
 174
 175         /// initialization
 176         mAccountMgr = AccountManager.get(this);
 177         mNewCapturedUriFromOAuth2Redirection = null;
 178         mAction = getIntent().getByteExtra(EXTRA_ACTION, ACTION_CREATE);
 179         mAccount = null;
 180         mHostBaseUrl = "";
 181
 182         if (savedInstanceState == null) {
 183             /// connection state and info
 184             mServerStatusText = mServerStatusIcon = 0;
 185             mServerIsValid = false;
 186             mServerIsChecked = false;
 187             mIsSslConn = false;
 188             mAuthStatusText = mAuthStatusIcon = 0;
 189
 190             /// retrieve extras from intent
 191             String tokenType = getIntent().getExtras().getString(AccountAuthenticator.KEY_AUTH_TOKEN_TYPE);
 192             boolean oAuthRequired = AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN.equals(tokenType) || OAUTH_MODE_ON.equals(getString(R.string.oauth2_mode));
 193
 194             mAccount = getIntent().getExtras().getParcelable(EXTRA_ACCOUNT);
 195             if (mAccount != null) {
 196                 String ocVersion = mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_OC_VERSION);
 197                 if (ocVersion != null) {
 198                     mDiscoveredVersion = new OwnCloudVersion(ocVersion);
 199                 }
 200                 mHostBaseUrl = normalizeUrl(mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_OC_BASE_URL));
 201                 mHostUrlInput.setText(mHostBaseUrl);
 202                 String userName = mAccount.name.substring(0, mAccount.name.lastIndexOf('@'));
 203                 mUsernameInput.setText(userName);
 204                 oAuthRequired = (mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_SUPPORTS_OAUTH2) != null);
 205             }
 206             mOAuth2Check.setChecked(oAuthRequired);
 207             changeViewByOAuth2Check(oAuthRequired);
 208
 209
 210         } else {
 211             /// connection state and info
 212             mServerIsValid = savedInstanceState.getBoolean(KEY_SERVER_VALID);
 213             mServerIsChecked = savedInstanceState.getBoolean(KEY_SERVER_CHECKED);
 214             mServerStatusText = savedInstanceState.getInt(KEY_SERVER_STATUS_TEXT);
 215             mServerStatusIcon = savedInstanceState.getInt(KEY_SERVER_STATUS_ICON);
 216             mIsSslConn = savedInstanceState.getBoolean(KEY_IS_SSL_CONN);
 217             mAuthStatusText = savedInstanceState.getInt(KEY_AUTH_STATUS_TEXT);
 218             mAuthStatusIcon = savedInstanceState.getInt(KEY_AUTH_STATUS_ICON);
 219
 220             /// server data
 221             String ocVersion = savedInstanceState.getString(KEY_OC_VERSION);
 222             if (ocVersion != null) {
 223                 mDiscoveredVersion = new OwnCloudVersion(ocVersion);
 224             }
 225             mHostBaseUrl = savedInstanceState.getString(KEY_HOST_URL_TEXT);
 226
 227             // account data, if updating
 228             mAccount = savedInstanceState.getParcelable(KEY_ACCOUNT);
 229
 230             // check if server check was interrupted by a configuration change
 231             if (savedInstanceState.getBoolean(KEY_SERVER_CHECK_IN_PROGRESS, false)) {
 232                 checkOcServer();
 233             }
 234
 235         }
 236
 237         showServerStatus();
 238         showAuthStatus();
 239         if (mServerIsChecked && !mServerIsValid) showRefreshButton();
 240         mOkButton.setEnabled(mServerIsValid); // state not automatically recovered in configuration changes
 241
 242         if (!OAUTH_MODE_OPTIONAL.equals(getString(R.string.oauth2_mode))) {
 243             mOAuth2Check.setVisibility(View.GONE);
 244         }
 245
 246         if (mAction == ACTION_UPDATE_TOKEN) {
 247             /// lock things that should not change
 248             mHostUrlInput.setEnabled(false);
 249             mUsernameInput.setEnabled(false);
 250             mOAuth2Check.setVisibility(View.GONE);
 251             if (!mServerIsValid && mOcServerChkOperation == null) {
 252                 checkOcServer();
 253             }
 254         }
 255
 256         mPasswordInput.setText("");     // clean password to avoid social hacking (disadvantage: password in removed if the device is turned aside)
 257         mJustCreated = true;
 258
 259         /// bind view elements to listeners
 260         mHostUrlInput.setOnFocusChangeListener(this);
 261         mHostUrlInput.setOnTouchListener(new RightDrawableOnTouchListener() {
 262             @Override
 263             public boolean onDrawableTouch(final MotionEvent event) {
 264                 AuthenticatorActivity.this.onRefreshClick(mHostUrlInput);
 265                 return true;
 266             }
 267         });
 268         mHostUrlInput.addTextChangedListener(new TextWatcher() {
 269
 270             @Override
 271             public void afterTextChanged(Editable s) {
 272                 mOkButton.setEnabled(false);
 273             }
 274
 275             @Override
 276             public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
 277
 278             @Override
 279             public void onTextChanged(CharSequence s, int start, int before, int count) {}
 280
 281         });
 282         mPasswordInput.setOnFocusChangeListener(this);
 283         mPasswordInput.setImeOptions(EditorInfo.IME_ACTION_DONE);
 284         mPasswordInput.setOnEditorActionListener(this);
 285     }
 286
 287     /**
 288      * Saves relevant state before {@link #onPause()}
 289      *
 290      * Do NOT save {@link #mNewCapturedUriFromOAuth2Redirection}; it keeps a temporal flag, intended to defer the
 291      * processing of the redirection caught in {@link #onNewIntent(Intent)} until {@link #onResume()}
 292      *
 293      * See {@link #loadSavedInstanceState(Bundle)}
 294      */
 295     @Override
 296     protected void onSaveInstanceState(Bundle outState) {
 297         super.onSaveInstanceState(outState);
 298
 299         /// connection state and info
 300         outState.putInt(KEY_SERVER_STATUS_TEXT, mServerStatusText);
 301         outState.putInt(KEY_SERVER_STATUS_ICON, mServerStatusIcon);
 302         outState.putBoolean(KEY_SERVER_VALID, mServerIsValid);
 303         outState.putBoolean(KEY_SERVER_CHECKED, mServerIsChecked);
 304         outState.putBoolean(KEY_SERVER_CHECK_IN_PROGRESS, (!mServerIsValid && mOcServerChkOperation != null));
 305         outState.putBoolean(KEY_IS_SSL_CONN, mIsSslConn);
 306         outState.putInt(KEY_AUTH_STATUS_ICON, mAuthStatusIcon);
 307         outState.putInt(KEY_AUTH_STATUS_TEXT, mAuthStatusText);
 308
 309         /// server data
 310         if (mDiscoveredVersion != null) {
 311             outState.putString(KEY_OC_VERSION, mDiscoveredVersion.toString());
 312         }
 313         outState.putString(KEY_HOST_URL_TEXT, mHostBaseUrl);
 314
 315         /// account data, if updating
 316         if (mAccount != null) {
 317             outState.putParcelable(KEY_ACCOUNT, mAccount);
 318         }
 319
 320     }
 321
 322
 323     /**
 324      * The redirection triggered by the OAuth authentication server as response to the GET AUTHORIZATION request
 325      * is caught here.
 326      *
 327      * To make this possible, this activity needs to be qualified with android:launchMode = "singleTask" in the
 328      * AndroidManifest.xml file.
 329      */
 330     @Override
 331     protected void onNewIntent (Intent intent) {
 332         Log_OC.d(TAG, "onNewIntent()");
 333         Uri data = intent.getData();
 334         if (data != null && data.toString().startsWith(getString(R.string.oauth2_redirect_uri))) {
 335             mNewCapturedUriFromOAuth2Redirection = data;
 336         }
 337     }
 338
 339
 340     /**
 341      * The redirection triggered by the OAuth authentication server as response to the GET AUTHORIZATION, and
 342      * deferred in {@link #onNewIntent(Intent)}, is processed here.
 343      */
 344     @Override
 345     protected void onResume() {
 346         super.onResume();
 347         // the state of mOAuth2Check is automatically recovered between configuration changes, but not before onCreate() finishes; so keep the next lines here
 348         changeViewByOAuth2Check(mOAuth2Check.isChecked());
 349         if (mAction == ACTION_UPDATE_TOKEN && mJustCreated) {
 350             if (mOAuth2Check.isChecked())
 351                 Toast.makeText(this, R.string.auth_expired_oauth_token_toast, Toast.LENGTH_LONG).show();
 352             else
 353                 Toast.makeText(this, R.string.auth_expired_basic_auth_toast, Toast.LENGTH_LONG).show();
 354         }
 355
 356         if (mNewCapturedUriFromOAuth2Redirection != null) {
 357             getOAuth2AccessTokenFromCapturedRedirection();
 358         }
 359
 360         mJustCreated = false;
 361     }
 362
 363
 364     /**
 365      * Parses the redirection with the response to the GET AUTHORIZATION request to the
 366      * oAuth server and requests for the access token (GET ACCESS TOKEN)
 367      */
 368     private void getOAuth2AccessTokenFromCapturedRedirection() {
 369         /// Parse data from OAuth redirection
 370         String queryParameters = mNewCapturedUriFromOAuth2Redirection.getQuery();
 371         mNewCapturedUriFromOAuth2Redirection = null;
 372
 373         /// Showing the dialog with instructions for the user.
 374         showDialog(DIALOG_OAUTH2_LOGIN_PROGRESS);
 375
 376         /// GET ACCESS TOKEN to the oAuth server
 377         RemoteOperation operation = new OAuth2GetAccessToken(   getString(R.string.oauth2_client_id),
 378                                                                 getString(R.string.oauth2_redirect_uri),
 379                                                                 getString(R.string.oauth2_grant_type),
 380                                                                 queryParameters);
 381         //WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(getString(R.string.oauth2_url_endpoint_access)), getApplicationContext());
 382         WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mOAuthTokenEndpointText.getText().toString().trim()), getApplicationContext());
 383         operation.execute(client, this, mHandler);
 384     }
 385
 386
 387
 388     /**
 389      * Handles the change of focus on the text inputs for the server URL and the password
 390      */
 391     public void onFocusChange(View view, boolean hasFocus) {
 392         if (view.getId() == R.id.hostUrlInput && !hasFocus) {
 393             onUrlInputFocusLost((TextView) view);
 394
 395         } else if (view.getId() == R.id.account_password) {
 396             onPasswordFocusChanged((TextView) view, hasFocus);
 397         }
 398     }
 399
 400
 401     /**
 402      * Handles changes in focus on the text input for the server URL.
 403      *
 404      * IMPORTANT ENTRY POINT 2: When (!hasFocus), user wrote the server URL and changed to
 405      * other field. The operation to check the existence of the server in the entered URL is
 406      * started.
 407      *
 408      * When hasFocus:    user 'comes back' to write again the server URL.
 409      *
 410      * @param hostInput     TextView with the URL input field receiving the change of focus.
 411      */
 412     private void onUrlInputFocusLost(TextView hostInput) {
 413         if (!mHostBaseUrl.equals(normalizeUrl(mHostUrlInput.getText().toString()))) {
 414             checkOcServer();
 415         } else {
 416             mOkButton.setEnabled(mServerIsValid);
 417         }
 418     }
 419
 420
 421     private void checkOcServer() {
 422         String uri = mHostUrlInput.getText().toString().trim();
 423         mServerIsValid = false;
 424         mServerIsChecked = false;
 425         mOkButton.setEnabled(false);
 426         mDiscoveredVersion = null;
 427         hideRefreshButton();
 428         if (uri.length() != 0) {
 429             mServerStatusText = R.string.auth_testing_connection;
 430             mServerStatusIcon = R.drawable.progress_small;
 431             showServerStatus();
 432             mOcServerChkOperation = new  OwnCloudServerCheckOperation(uri, this);
 433             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(uri), this);
 434             mOperationThread = mOcServerChkOperation.execute(client, this, mHandler);
 435         } else {
 436             mServerStatusText = 0;
 437             mServerStatusIcon = 0;
 438             showServerStatus();
 439         }
 440     }
 441
 442
 443     /**
 444      * Handles changes in focus on the text input for the password (basic authorization).
 445      *
 446      * When (hasFocus), the button to toggle password visibility is shown.
 447      *
 448      * When (!hasFocus), the button is made invisible and the password is hidden.
 449      *
 450      * @param passwordInput    TextView with the password input field receiving the change of focus.
 451      * @param hasFocus          'True' if focus is received, 'false' if is lost
 452      */
 453     private void onPasswordFocusChanged(TextView passwordInput, boolean hasFocus) {
 454         if (hasFocus) {
 455             mViewPasswordButton.setVisibility(View.VISIBLE);
 456         } else {
 457             int input_type = InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD;
 458             passwordInput.setInputType(input_type);
 459             mViewPasswordButton.setVisibility(View.INVISIBLE);
 460         }
 461     }
 462
 463
 464
 465     /**
 466      * Cancels the authenticator activity
 467      *
 468      * IMPORTANT ENTRY POINT 3: Never underestimate the importance of cancellation
 469      *
 470      * This method is bound in the layout/acceoun_setup.xml resource file.
 471      *
 472      * @param view      Cancel button
 473      */
 474     public void onCancelClick(View view) {
 475         setResult(RESULT_CANCELED);     // TODO review how is this related to AccountAuthenticator (debugging)
 476         finish();
 477     }
 478
 479
 480
 481     /**
 482      * Checks the credentials of the user in the root of the ownCloud server
 483      * before creating a new local account.
 484      *
 485      * For basic authorization, a check of existence of the root folder is
 486      * performed.
 487      *
 488      * For OAuth, starts the flow to get an access token; the credentials test
 489      * is postponed until it is available.
 490      *
 491      * IMPORTANT ENTRY POINT 4
 492      *
 493      * @param view      OK button
 494      */
 495     public void onOkClick(View view) {
 496         // this check should be unnecessary
 497         if (mDiscoveredVersion == null || !mDiscoveredVersion.isVersionValid()  || mHostBaseUrl == null || mHostBaseUrl.length() == 0) {
 498             mServerStatusIcon = R.drawable.common_error;
 499             mServerStatusText = R.string.auth_wtf_reenter_URL;
 500             showServerStatus();
 501             mOkButton.setEnabled(false);
 502             Log_OC.wtf(TAG,  "The user was allowed to click 'connect' to an unchecked server!!");
 503             return;
 504         }
 505
 506         if (mOAuth2Check.isChecked()) {
 507             startOauthorization();
 508
 509         } else {
 510             checkBasicAuthorization();
 511         }
 512     }
 513
 514
 515     /**
 516      * Tests the credentials entered by the user performing a check of existence on
 517      * the root folder of the ownCloud server.
 518      */
 519     private void checkBasicAuthorization() {
 520         /// get the path to the root folder through WebDAV from the version server
 521         String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, false);
 522
 523         /// get basic credentials entered by user
 524         String username = mUsernameInput.getText().toString();
 525         String password = mPasswordInput.getText().toString();
 526
 527         /// be gentle with the user
 528         showDialog(DIALOG_LOGIN_PROGRESS);
 529
 530         /// test credentials accessing the root folder
 531         mAuthCheckOperation = new  ExistenceCheckOperation("", this, false);
 532         WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this);
 533         client.setBasicCredentials(username, password);
 534         mOperationThread = mAuthCheckOperation.execute(client, this, mHandler);
 535     }
 536
 537
 538     /**
 539      * Starts the OAuth 'grant type' flow to get an access token, with
 540      * a GET AUTHORIZATION request to the BUILT-IN authorization server.
 541      */
 542     private void startOauthorization() {
 543         // be gentle with the user
 544         mAuthStatusIcon = R.drawable.progress_small;
 545         mAuthStatusText = R.string.oauth_login_connection;
 546         showAuthStatus();
 547
 548         // GET AUTHORIZATION request
 549         //Uri uri = Uri.parse(getString(R.string.oauth2_url_endpoint_auth));
 550         Uri uri = Uri.parse(mOAuthAuthEndpointText.getText().toString().trim());
 551         Uri.Builder uriBuilder = uri.buildUpon();
 552         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_RESPONSE_TYPE, getString(R.string.oauth2_response_type));
 553         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_REDIRECT_URI, getString(R.string.oauth2_redirect_uri));
 554         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_CLIENT_ID, getString(R.string.oauth2_client_id));
 555         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_SCOPE, getString(R.string.oauth2_scope));
 556         //uriBuilder.appendQueryParameter(OAuth2Constants.KEY_STATE, whateverwewant);
 557         uri = uriBuilder.build();
 558         Log_OC.d(TAG, "Starting browser to view " + uri.toString());
 559         Intent i = new Intent(Intent.ACTION_VIEW, uri);
 560         startActivity(i);
 561     }
 562
 563
 564     /**
 565      * Callback method invoked when a RemoteOperation executed by this Activity finishes.
 566      *
 567      * Dispatches the operation flow to the right method.
 568      */
 569     @Override
 570     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 571
 572         if (operation instanceof OwnCloudServerCheckOperation) {
 573             onOcServerCheckFinish((OwnCloudServerCheckOperation) operation, result);
 574
 575         } else if (operation instanceof OAuth2GetAccessToken) {
 576             onGetOAuthAccessTokenFinish((OAuth2GetAccessToken)operation, result);
 577
 578         } else if (operation instanceof ExistenceCheckOperation)  {
 579             onAuthorizationCheckFinish((ExistenceCheckOperation)operation, result);
 580
 581         }
 582     }
 583
 584
 585     /**
 586      * Processes the result of the server check performed when the user finishes the enter of the
 587      * server URL.
 588      *
 589      * @param operation     Server check performed.
 590      * @param result        Result of the check.
 591      */
 592     private void onOcServerCheckFinish(OwnCloudServerCheckOperation operation, RemoteOperationResult result) {
 593         if (operation.equals(mOcServerChkOperation)) {
 594             /// save result state
 595             mServerIsChecked = true;
 596             mServerIsValid = result.isSuccess();
 597             mIsSslConn = (result.getCode() == ResultCode.OK_SSL);
 598             mOcServerChkOperation = null;
 599
 600             /// update status icon and text
 601             if (mServerIsValid) {
 602                 hideRefreshButton();
 603             } else {
 604                 showRefreshButton();
 605             }
 606             updateServerStatusIconAndText(result);
 607             showServerStatus();
 608
 609             /// very special case (TODO: move to a common place for all the remote operations)
 610             if (result.getCode() == ResultCode.SSL_RECOVERABLE_PEER_UNVERIFIED) {
 611                 mLastSslUntrustedServerResult = result;
 612                 showDialog(DIALOG_SSL_VALIDATOR);
 613             }
 614
 615             /// retrieve discovered version and normalize server URL
 616             mDiscoveredVersion = operation.getDiscoveredVersion();
 617             mHostBaseUrl = normalizeUrl(mHostUrlInput.getText().toString());
 618
 619             /// allow or not the user try to access the server
 620             mOkButton.setEnabled(mServerIsValid);
 621
 622         }   // else nothing ; only the last check operation is considered;
 623             // multiple can be triggered if the user amends a URL before a previous check can be triggered
 624     }
 625
 626
 627     private String normalizeUrl(String url) {
 628         if (url != null && url.length() > 0) {
 629             url = url.trim();
 630             if (!url.toLowerCase().startsWith("http://") &&
 631                     !url.toLowerCase().startsWith("https://")) {
 632                 if (mIsSslConn) {
 633                     url = "https://" + url;
 634                 } else {
 635                     url = "http://" + url;
 636                 }
 637
 638             }
 639             if (url.endsWith("/")) {
 640                 url = url.substring(0, url.length() - 1);
 641             }
 642         }
 643         return url;
 644     }
 645
 646     /**
 647      * Chooses the right icon and text to show to the user for the received operation result.
 648      *
 649      * @param result    Result of a remote operation performed in this activity
 650      */
 651     private void updateServerStatusIconAndText(RemoteOperationResult result) {
 652         mServerStatusIcon = R.drawable.common_error;    // the most common case in the switch below
 653
 654         switch (result.getCode()) {
 655         case OK_SSL:
 656             mServerStatusIcon = android.R.drawable.ic_secure;
 657             mServerStatusText = R.string.auth_secure_connection;
 658             break;
 659
 660         case OK_NO_SSL:
 661         case OK:
 662             if (mHostUrlInput.getText().toString().trim().toLowerCase().startsWith("http://") ) {
 663                 mServerStatusText = R.string.auth_connection_established;
 664                 mServerStatusIcon = R.drawable.ic_ok;
 665             } else {
 666                 mServerStatusText = R.string.auth_nossl_plain_ok_title;
 667                 mServerStatusIcon = android.R.drawable.ic_partial_secure;
 668             }
 669             break;
 670
 671         case NO_NETWORK_CONNECTION:
 672             mServerStatusIcon = R.drawable.no_network;
 673             mServerStatusText = R.string.auth_no_net_conn_title;
 674             break;
 675
 676         case SSL_RECOVERABLE_PEER_UNVERIFIED:
 677             mServerStatusText = R.string.auth_ssl_unverified_server_title;
 678             break;
 679         case BAD_OC_VERSION:
 680             mServerStatusText = R.string.auth_bad_oc_version_title;
 681             break;
 682         case WRONG_CONNECTION:
 683             mServerStatusText = R.string.auth_wrong_connection_title;
 684             break;
 685         case TIMEOUT:
 686             mServerStatusText = R.string.auth_timeout_title;
 687             break;
 688         case INCORRECT_ADDRESS:
 689             mServerStatusText = R.string.auth_incorrect_address_title;
 690             break;
 691         case SSL_ERROR:
 692             mServerStatusText = R.string.auth_ssl_general_error_title;
 693             break;
 694         case UNAUTHORIZED:
 695             mServerStatusText = R.string.auth_unauthorized;
 696             break;
 697         case HOST_NOT_AVAILABLE:
 698             mServerStatusText = R.string.auth_unknown_host_title;
 699             break;
 700         case INSTANCE_NOT_CONFIGURED:
 701             mServerStatusText = R.string.auth_not_configured_title;
 702             break;
 703         case FILE_NOT_FOUND:
 704             mServerStatusText = R.string.auth_incorrect_path_title;
 705             break;
 706         case OAUTH2_ERROR:
 707             mServerStatusText = R.string.auth_oauth_error;
 708             break;
 709         case OAUTH2_ERROR_ACCESS_DENIED:
 710             mServerStatusText = R.string.auth_oauth_error_access_denied;
 711             break;
 712         case UNHANDLED_HTTP_CODE:
 713         case UNKNOWN_ERROR:
 714             mServerStatusText = R.string.auth_unknown_error_title;
 715             break;
 716         default:
 717             mServerStatusText = 0;
 718             mServerStatusIcon = 0;
 719         }
 720     }
 721
 722
 723     /**
 724      * Chooses the right icon and text to show to the user for the received operation result.
 725      *
 726      * @param result    Result of a remote operation performed in this activity
 727      */
 728     private void updateAuthStatusIconAndText(RemoteOperationResult result) {
 729         mAuthStatusIcon = R.drawable.common_error;    // the most common case in the switch below
 730
 731         switch (result.getCode()) {
 732         case OK_SSL:
 733             mAuthStatusIcon = android.R.drawable.ic_secure;
 734             mAuthStatusText = R.string.auth_secure_connection;
 735             break;
 736
 737         case OK_NO_SSL:
 738         case OK:
 739             if (mHostUrlInput.getText().toString().trim().toLowerCase().startsWith("http://") ) {
 740                 mAuthStatusText = R.string.auth_connection_established;
 741                 mAuthStatusIcon = R.drawable.ic_ok;
 742             } else {
 743                 mAuthStatusText = R.string.auth_nossl_plain_ok_title;
 744                 mAuthStatusIcon = android.R.drawable.ic_partial_secure;
 745             }
 746             break;
 747
 748         case NO_NETWORK_CONNECTION:
 749             mAuthStatusIcon = R.drawable.no_network;
 750             mAuthStatusText = R.string.auth_no_net_conn_title;
 751             break;
 752
 753         case SSL_RECOVERABLE_PEER_UNVERIFIED:
 754             mAuthStatusText = R.string.auth_ssl_unverified_server_title;
 755             break;
 756         case BAD_OC_VERSION:
 757             mAuthStatusText = R.string.auth_bad_oc_version_title;
 758             break;
 759         case WRONG_CONNECTION:
 760             mAuthStatusText = R.string.auth_wrong_connection_title;
 761             break;
 762         case TIMEOUT:
 763             mAuthStatusText = R.string.auth_timeout_title;
 764             break;
 765         case INCORRECT_ADDRESS:
 766             mAuthStatusText = R.string.auth_incorrect_address_title;
 767             break;
 768         case SSL_ERROR:
 769             mAuthStatusText = R.string.auth_ssl_general_error_title;
 770             break;
 771         case UNAUTHORIZED:
 772             mAuthStatusText = R.string.auth_unauthorized;
 773             break;
 774         case HOST_NOT_AVAILABLE:
 775             mAuthStatusText = R.string.auth_unknown_host_title;
 776             break;
 777         case INSTANCE_NOT_CONFIGURED:
 778             mAuthStatusText = R.string.auth_not_configured_title;
 779             break;
 780         case FILE_NOT_FOUND:
 781             mAuthStatusText = R.string.auth_incorrect_path_title;
 782             break;
 783         case OAUTH2_ERROR:
 784             mAuthStatusText = R.string.auth_oauth_error;
 785             break;
 786         case OAUTH2_ERROR_ACCESS_DENIED:
 787             mAuthStatusText = R.string.auth_oauth_error_access_denied;
 788             break;
 789         case UNHANDLED_HTTP_CODE:
 790         case UNKNOWN_ERROR:
 791             mAuthStatusText = R.string.auth_unknown_error_title;
 792             break;
 793         default:
 794             mAuthStatusText = 0;
 795             mAuthStatusIcon = 0;
 796         }
 797     }
 798
 799
 800     /**
 801      * Processes the result of the request for and access token send
 802      * to an OAuth authorization server.
 803      *
 804      * @param operation     Operation performed requesting the access token.
 805      * @param result        Result of the operation.
 806      */
 807     private void onGetOAuthAccessTokenFinish(OAuth2GetAccessToken operation, RemoteOperationResult result) {
 808         try {
 809             dismissDialog(DIALOG_OAUTH2_LOGIN_PROGRESS);
 810         } catch (IllegalArgumentException e) {
 811             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 812         }
 813
 814         String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, true);
 815         if (result.isSuccess() && webdav_path != null) {
 816             /// be gentle with the user
 817             showDialog(DIALOG_LOGIN_PROGRESS);
 818
 819             /// time to test the retrieved access token on the ownCloud server
 820             mOAuthAccessToken = ((OAuth2GetAccessToken)operation).getResultTokenMap().get(OAuth2Constants.KEY_ACCESS_TOKEN);
 821             Log_OC.d(TAG, "Got ACCESS TOKEN: " + mOAuthAccessToken);
 822             mAuthCheckOperation = new ExistenceCheckOperation("", this, false);
 823             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this);
 824             client.setBearerCredentials(mOAuthAccessToken);
 825             mAuthCheckOperation.execute(client, this, mHandler);
 826
 827         } else {
 828             updateAuthStatusIconAndText(result);
 829             showAuthStatus();
 830             Log_OC.d(TAG, "Access failed: " + result.getLogMessage());
 831         }
 832     }
 833
 834
 835     /**
 836      * Processes the result of the access check performed to try the user credentials.
 837      *
 838      * Creates a new account through the AccountManager.
 839      *
 840      * @param operation     Access check performed.
 841      * @param result        Result of the operation.
 842      */
 843     private void onAuthorizationCheckFinish(ExistenceCheckOperation operation, RemoteOperationResult result) {
 844         try {
 845             dismissDialog(DIALOG_LOGIN_PROGRESS);
 846         } catch (IllegalArgumentException e) {
 847             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 848         }
 849
 850         if (result.isSuccess()) {
 851             Log_OC.d(TAG, "Successful access - time to save the account");
 852
 853             if (mAction == ACTION_CREATE) {
 854                 createAccount();
 855
 856             } else {
 857                 updateToken();
 858             }
 859
 860             finish();
 861
 862         } else {
 863             updateAuthStatusIconAndText(result);
 864             showAuthStatus();
 865             Log_OC.d(TAG, "Access failed: " + result.getLogMessage());
 866         }
 867     }
 868
 869
 870     /**
 871      * Sets the proper response to get that the Account Authenticator that started this activity saves
 872      * a new authorization token for mAccount.
 873      */
 874     private void updateToken() {
 875         Bundle response = new Bundle();
 876         response.putString(AccountManager.KEY_ACCOUNT_NAME, mAccount.name);
 877         response.putString(AccountManager.KEY_ACCOUNT_TYPE, mAccount.type);
 878         boolean isOAuth = mOAuth2Check.isChecked();
 879         if (isOAuth) {
 880             response.putString(AccountManager.KEY_AUTHTOKEN, mOAuthAccessToken);
 881             // the next line is necessary; by now, notifications are calling directly to the AuthenticatorActivity to update, without AccountManager intervention
 882             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
 883         } else {
 884             response.putString(AccountManager.KEY_AUTHTOKEN, mPasswordInput.getText().toString());
 885             mAccountMgr.setPassword(mAccount, mPasswordInput.getText().toString());
 886         }
 887         setAccountAuthenticatorResult(response);
 888     }
 889
 890
 891     /**
 892      * Creates a new account through the Account Authenticator that started this activity.
 893      *
 894      * This makes the account permanent.
 895      *
 896      * TODO Decide how to name the OAuth accounts
 897      */
 898     private void createAccount() {
 899         /// create and save new ownCloud account
 900         boolean isOAuth = mOAuth2Check.isChecked();
 901
 902         Uri uri = Uri.parse(mHostBaseUrl);
 903         String username = mUsernameInput.getText().toString().trim();
 904         if (isOAuth) {
 905             username = "OAuth_user" + (new java.util.Random(System.currentTimeMillis())).nextLong();
 906         }
 907         String accountName = username + "@" + uri.getHost();
 908         if (uri.getPort() >= 0) {
 909             accountName += ":" + uri.getPort();
 910         }
 911         mAccount = new Account(accountName, AccountAuthenticator.ACCOUNT_TYPE);
 912         if (isOAuth) {
 913             mAccountMgr.addAccountExplicitly(mAccount, "", null);  // with our implementation, the password is never input in the app
 914         } else {
 915             mAccountMgr.addAccountExplicitly(mAccount, mPasswordInput.getText().toString(), null);
 916         }
 917
 918         /// add the new account as default in preferences, if there is none already
 919         Account defaultAccount = AccountUtils.getCurrentOwnCloudAccount(this);
 920         if (defaultAccount == null) {
 921             SharedPreferences.Editor editor = PreferenceManager
 922                     .getDefaultSharedPreferences(this).edit();
 923             editor.putString("select_oc_account", accountName);
 924             editor.commit();
 925         }
 926
 927         /// prepare result to return to the Authenticator
 928         //  TODO check again what the Authenticator makes with it; probably has the same effect as addAccountExplicitly, but it's not well done
 929         final Intent intent = new Intent();
 930         intent.putExtra(AccountManager.KEY_ACCOUNT_TYPE,    AccountAuthenticator.ACCOUNT_TYPE);
 931         intent.putExtra(AccountManager.KEY_ACCOUNT_NAME,    mAccount.name);
 932         if (!isOAuth)
 933             intent.putExtra(AccountManager.KEY_AUTHTOKEN,   AccountAuthenticator.ACCOUNT_TYPE); // TODO check this; not sure it's right; maybe
 934         intent.putExtra(AccountManager.KEY_USERDATA,        username);
 935         if (isOAuth) {
 936             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
 937         }
 938         /// add user data to the new account; TODO probably can be done in the last parameter addAccountExplicitly, or in KEY_USERDATA
 939         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_VERSION,    mDiscoveredVersion.toString());
 940         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_BASE_URL,   mHostBaseUrl);
 941         if (isOAuth)
 942             mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_SUPPORTS_OAUTH2, "TRUE");  // TODO this flag should be unnecessary
 943
 944         setAccountAuthenticatorResult(intent.getExtras());
 945         setResult(RESULT_OK, intent);
 946
 947         /// immediately request for the synchronization of the new account
 948         Bundle bundle = new Bundle();
 949         bundle.putBoolean(ContentResolver.SYNC_EXTRAS_MANUAL, true);
 950         ContentResolver.requestSync(mAccount, AccountAuthenticator.AUTHORITY, bundle);
 951     }
 952
 953
 954     /**
 955      * {@inheritDoc}
 956      *
 957      * Necessary to update the contents of the SSL Dialog
 958      *
 959      * TODO move to some common place for all possible untrusted SSL failures
 960      */
 961     @Override
 962     protected void onPrepareDialog(int id, Dialog dialog, Bundle args) {
 963         switch (id) {
 964         case DIALOG_LOGIN_PROGRESS:
 965         case DIALOG_CERT_NOT_SAVED:
 966         case DIALOG_OAUTH2_LOGIN_PROGRESS:
 967             break;
 968         case DIALOG_SSL_VALIDATOR: {
 969             ((SslValidatorDialog)dialog).updateResult(mLastSslUntrustedServerResult);
 970             break;
 971         }
 972         default:
 973             Log_OC.e(TAG, "Incorrect dialog called with id = " + id);
 974         }
 975     }
 976
 977
 978     /**
 979      * {@inheritDoc}
 980      */
 981     @Override
 982     protected Dialog onCreateDialog(int id) {
 983         Dialog dialog = null;
 984         switch (id) {
 985         case DIALOG_LOGIN_PROGRESS: {
 986             /// simple progress dialog
 987             ProgressDialog working_dialog = new ProgressDialog(this);
 988             working_dialog.setMessage(getResources().getString(R.string.auth_trying_to_login));
 989             working_dialog.setIndeterminate(true);
 990             working_dialog.setCancelable(true);
 991             working_dialog
 992                     .setOnCancelListener(new DialogInterface.OnCancelListener() {
 993                         @Override
 994                         public void onCancel(DialogInterface dialog) {
 995                             /// TODO study if this is enough
 996                             Log_OC.i(TAG, "Login canceled");
 997                             if (mOperationThread != null) {
 998                                 mOperationThread.interrupt();
 999                                 finish();
1000                             }
1001                         }
1002                     });
1003             dialog = working_dialog;
1004             break;
1005         }
1006         case DIALOG_OAUTH2_LOGIN_PROGRESS: {
1007             ProgressDialog working_dialog = new ProgressDialog(this);
1008             working_dialog.setMessage(String.format("Getting authorization"));
1009             working_dialog.setIndeterminate(true);
1010             working_dialog.setCancelable(true);
1011             working_dialog
1012             .setOnCancelListener(new DialogInterface.OnCancelListener() {
1013                 @Override
1014                 public void onCancel(DialogInterface dialog) {
1015                     Log_OC.i(TAG, "Login canceled");
1016                     finish();
1017                 }
1018             });
1019             dialog = working_dialog;
1020             break;
1021         }
1022         case DIALOG_SSL_VALIDATOR: {
1023             /// TODO start to use new dialog interface, at least for this (it is a FragmentDialog already)
1024             dialog = SslValidatorDialog.newInstance(this, mLastSslUntrustedServerResult, this);
1025             break;
1026         }
1027         case DIALOG_CERT_NOT_SAVED: {
1028             AlertDialog.Builder builder = new AlertDialog.Builder(this);
1029             builder.setMessage(getResources().getString(R.string.ssl_validator_not_saved));
1030             builder.setCancelable(false);
1031             builder.setPositiveButton(R.string.common_ok, new DialogInterface.OnClickListener() {
1032                     @Override
1033                     public void onClick(DialogInterface dialog, int which) {
1034                         dialog.dismiss();
1035                     };
1036                 });
1037             dialog = builder.create();
1038             break;
1039         }
1040         default:
1041             Log_OC.e(TAG, "Incorrect dialog called with id = " + id);
1042         }
1043         return dialog;
1044     }
1045
1046
1047     /**
1048      * Starts and activity to open the 'new account' page in the ownCloud web site
1049      *
1050      * @param view      'Account register' button
1051      */
1052     public void onRegisterClick(View view) {
1053         Intent register = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.url_account_register)));
1054         setResult(RESULT_CANCELED);
1055         startActivity(register);
1056     }
1057
1058
1059     /**
1060      * Updates the content and visibility state of the icon and text associated
1061      * to the last check on the ownCloud server.
1062      */
1063     private void showServerStatus() {
1064         TextView tv = (TextView) findViewById(R.id.server_status_text);
1065
1066         if (mServerStatusIcon == 0 && mServerStatusText == 0) {
1067             tv.setVisibility(View.INVISIBLE);
1068
1069         } else {
1070             tv.setText(mServerStatusText);
1071             tv.setCompoundDrawablesWithIntrinsicBounds(mServerStatusIcon, 0, 0, 0);
1072             tv.setVisibility(View.VISIBLE);
1073         }
1074
1075     }
1076
1077
1078     /**
1079      * Updates the content and visibility state of the icon and text associated
1080      * to the interactions with the OAuth authorization server.
1081      */
1082     private void showAuthStatus() {
1083         if (mAuthStatusIcon == 0 && mAuthStatusText == 0) {
1084             mAuthStatusLayout.setVisibility(View.INVISIBLE);
1085
1086         } else {
1087             mAuthStatusLayout.setText(mAuthStatusText);
1088             mAuthStatusLayout.setCompoundDrawablesWithIntrinsicBounds(mAuthStatusIcon, 0, 0, 0);
1089             mAuthStatusLayout.setVisibility(View.VISIBLE);
1090         }
1091     }
1092
1093
1094     private void showRefreshButton() {
1095         mHostUrlInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_action_refresh_black, 0);
1096     }
1097
1098     private void hideRefreshButton() {
1099         mHostUrlInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0);
1100     }
1101
1102     /**
1103      * Called when the refresh button in the input field for ownCloud host is clicked.
1104      *
1105      * Performs a new check on the URL in the input field.
1106      *
1107      * @param view      Refresh 'button'
1108      */
1109     public void onRefreshClick(View view) {
1110         checkOcServer();
1111     }
1112
1113
1114     /**
1115      * Called when the eye icon in the password field is clicked.
1116      *
1117      * Toggles the visibility of the password in the field.
1118      *
1119      * @param view      'View password' 'button'
1120      */
1121     public void onViewPasswordClick(View view) {
1122         int selectionStart = mPasswordInput.getSelectionStart();
1123         int selectionEnd = mPasswordInput.getSelectionEnd();
1124         int input_type = mPasswordInput.getInputType();
1125         if ((input_type & InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD) == InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD) {
1126             input_type = InputType.TYPE_CLASS_TEXT
1127                     | InputType.TYPE_TEXT_VARIATION_PASSWORD;
1128         } else {
1129             input_type = InputType.TYPE_CLASS_TEXT
1130                     | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD;
1131         }
1132         mPasswordInput.setInputType(input_type);
1133         mPasswordInput.setSelection(selectionStart, selectionEnd);
1134     }
1135
1136
1137     /**
1138      * Called when the checkbox for OAuth authorization is clicked.
1139      *
1140      * Hides or shows the input fields for user & password.
1141      *
1142      * @param view      'View password' 'button'
1143      */
1144     public void onCheckClick(View view) {
1145         CheckBox oAuth2Check = (CheckBox)view;
1146         changeViewByOAuth2Check(oAuth2Check.isChecked());
1147
1148     }
1149
1150     /**
1151      * Changes the visibility of input elements depending upon the kind of authorization
1152      * chosen by the user: basic or OAuth
1153      *
1154      * @param checked       'True' when OAuth is selected.
1155      */
1156     public void changeViewByOAuth2Check(Boolean checked) {
1157
1158         if (checked) {
1159             mOAuthAuthEndpointText.setVisibility(View.VISIBLE);
1160             mOAuthTokenEndpointText.setVisibility(View.VISIBLE);
1161             mUsernameInput.setVisibility(View.GONE);
1162             mPasswordInput.setVisibility(View.GONE);
1163             mViewPasswordButton.setVisibility(View.GONE);
1164         } else {
1165             mOAuthAuthEndpointText.setVisibility(View.GONE);
1166             mOAuthTokenEndpointText.setVisibility(View.GONE);
1167             mUsernameInput.setVisibility(View.VISIBLE);
1168             mPasswordInput.setVisibility(View.VISIBLE);
1169             mViewPasswordButton.setVisibility(View.INVISIBLE);
1170         }
1171
1172     }
1173
1174     /**
1175      * Called from SslValidatorDialog when a new server certificate was correctly saved.
1176      */
1177     public void onSavedCertificate() {
1178         mOperationThread = mOcServerChkOperation.retry(this, mHandler);
1179     }
1180
1181     /**
1182      * Called from SslValidatorDialog when a new server certificate could not be saved
1183      * when the user requested it.
1184      */
1185     @Override
1186     public void onFailedSavingCertificate() {
1187         showDialog(DIALOG_CERT_NOT_SAVED);
1188     }
1189
1190
1191     /**
1192      *  Called when the 'action' button in an IME is pressed ('enter' in software keyboard).
1193      *
1194      *  Used to trigger the authorization check when the user presses 'enter' after writing the password.
1195      */
1196     @Override
1197     public boolean onEditorAction(TextView inputField, int actionId, KeyEvent event) {
1198         if (inputField != null && inputField.equals(mPasswordInput) &&
1199                 actionId == EditorInfo.IME_ACTION_DONE) {
1200             if (mOkButton.isEnabled()) {
1201                 mOkButton.performClick();
1202             }
1203         }
1204         return false;   // always return false to grant that the software keyboard is hidden anyway
1205     }
1206
1207
1208     private abstract static class RightDrawableOnTouchListener implements OnTouchListener  {
1209
1210         private int fuzz = 10;
1211
1212         /**
1213          * {@inheritDoc}
1214          */
1215         @Override
1216         public boolean onTouch(View view, MotionEvent event) {
1217             if (event.getAction() == MotionEvent.ACTION_DOWN) {
1218                 Drawable rightDrawable = null;
1219                 if (view instanceof TextView) {
1220                     Drawable[] drawables = ((TextView)view).getCompoundDrawables();
1221                     if (drawables.length > 2) {
1222                         rightDrawable = drawables[2];
1223                     }
1224                 }
1225                 if (rightDrawable != null) {
1226                     final int x = (int) event.getX();
1227                     final int y = (int) event.getY();
1228                     final Rect bounds = rightDrawable.getBounds();
1229                     if (x >= (view.getRight() - bounds.width() - fuzz) && x <= (view.getRight() - view.getPaddingRight() + fuzz)
1230                         && y >= (view.getPaddingTop() - fuzz) && y <= (view.getHeight() - view.getPaddingBottom()) + fuzz) {
1231
1232                         return onDrawableTouch(event);
1233                     }
1234                 }
1235             }
1236             return false;
1237         }
1238
1239         public abstract boolean onDrawableTouch(final MotionEvent event);
1240     }
1241
1242 }