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     private String mHostBaseUrl;
 114     private OwnCloudVersion mDiscoveredVersion;
 115
 116     private int mServerStatusText, mServerStatusIcon;
 117     private boolean mServerIsChecked, mServerIsValid, 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
 146     /**
 147      * {@inheritDoc}
 148      *
 149      * IMPORTANT ENTRY POINT 1: activity is shown to the user
 150      */
 151     @Override
 152     protected void onCreate(Bundle savedInstanceState) {
 153         super.onCreate(savedInstanceState);
 154         getWindow().requestFeature(Window.FEATURE_NO_TITLE);
 155
 156         /// set view and get references to view elements
 157         setContentView(R.layout.account_setup);
 158         mViewPasswordButton = (ImageView) findViewById(R.id.viewPasswordButton);
 159         mHostUrlInput = (EditText) findViewById(R.id.hostUrlInput);
 160         mUsernameInput = (EditText) findViewById(R.id.account_username);
 161         mPasswordInput = (EditText) findViewById(R.id.account_password);
 162         mOAuthAuthEndpointText = (TextView)findViewById(R.id.oAuthEntryPoint_1);
 163         mOAuthTokenEndpointText = (TextView)findViewById(R.id.oAuthEntryPoint_2);
 164         mOAuth2Check = (CheckBox) findViewById(R.id.oauth_onOff_check);
 165         mOkButton = findViewById(R.id.buttonOK);
 166         mAuthStatusLayout = (TextView) findViewById(R.id.auth_status_text);
 167
 168         /// complete label for 'register account' button
 169         Button b = (Button) findViewById(R.id.account_register);
 170         if (b != null) {
 171             b.setText(String.format(getString(R.string.auth_register), getString(R.string.app_name)));
 172         }
 173
 174         /// initialization
 175         mAccountMgr = AccountManager.get(this);
 176         mNewCapturedUriFromOAuth2Redirection = null;
 177         mAction = getIntent().getByteExtra(EXTRA_ACTION, ACTION_CREATE);
 178         mAccount = null;
 179         mHostBaseUrl = "";
 180
 181         if (savedInstanceState == null) {
 182             /// connection state and info
 183             mServerStatusText = mServerStatusIcon = 0;
 184             mServerIsValid = false;
 185             mServerIsChecked = false;
 186             mIsSslConn = false;
 187             mAuthStatusText = mAuthStatusIcon = 0;
 188
 189             /// retrieve extras from intent
 190             String tokenType = getIntent().getExtras().getString(AccountAuthenticator.KEY_AUTH_TOKEN_TYPE);
 191             boolean oAuthRequired = AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN.equals(tokenType) || OAUTH_MODE_ON.equals(getString(R.string.oauth2_mode));
 192
 193             mAccount = getIntent().getExtras().getParcelable(EXTRA_ACCOUNT);
 194             if (mAccount != null) {
 195                 String ocVersion = mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_OC_VERSION);
 196                 if (ocVersion != null) {
 197                     mDiscoveredVersion = new OwnCloudVersion(ocVersion);
 198                 }
 199                 mHostBaseUrl = normalizeUrl(mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_OC_BASE_URL));
 200                 mHostUrlInput.setText(mHostBaseUrl);
 201                 String userName = mAccount.name.substring(0, mAccount.name.lastIndexOf('@'));
 202                 mUsernameInput.setText(userName);
 203                 oAuthRequired = (mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_SUPPORTS_OAUTH2) != null);
 204             }
 205             mOAuth2Check.setChecked(oAuthRequired);
 206             changeViewByOAuth2Check(oAuthRequired);
 207
 208
 209         } else {
 210             /// connection state and info
 211             mServerIsValid = savedInstanceState.getBoolean(KEY_SERVER_VALID);
 212             mServerIsChecked = savedInstanceState.getBoolean(KEY_SERVER_CHECKED);
 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         if (mServerIsChecked && !mServerIsValid) showRefreshButton();
 239         mOkButton.setEnabled(mServerIsValid); // state not automatically recovered in configuration changes
 240
 241         if (!OAUTH_MODE_OPTIONAL.equals(getString(R.string.oauth2_mode))) {
 242             mOAuth2Check.setVisibility(View.GONE);
 243         }
 244
 245         if (mAction == ACTION_UPDATE_TOKEN) {
 246             /// lock things that should not change
 247             mHostUrlInput.setEnabled(false);
 248             mUsernameInput.setEnabled(false);
 249             mOAuth2Check.setVisibility(View.GONE);
 250             if (!mServerIsValid && mOcServerChkOperation == null) {
 251                 checkOcServer();
 252             }
 253         }
 254
 255         mPasswordInput.setText("");     // clean password to avoid social hacking (disadvantage: password in removed if the device is turned aside)
 256         mJustCreated = true;
 257
 258         /// bind view elements to listeners
 259         mHostUrlInput.setOnFocusChangeListener(this);
 260         mHostUrlInput.setOnTouchListener(new RightDrawableOnTouchListener() {
 261             @Override
 262             public boolean onDrawableTouch(final MotionEvent event) {
 263                 AuthenticatorActivity.this.onRefreshClick(mHostUrlInput);
 264                 return true;
 265             }
 266         });
 267         mHostUrlInput.addTextChangedListener(new TextWatcher() {
 268
 269             @Override
 270             public void afterTextChanged(Editable s) {
 271                 if (!mHostBaseUrl.equals(normalizeUrl(mHostUrlInput.getText().toString()))) {
 272                     mOkButton.setEnabled(false);
 273                 }
 274             }
 275
 276             @Override
 277             public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
 278
 279             @Override
 280             public void onTextChanged(CharSequence s, int start, int before, int count) {}
 281
 282         });
 283         mPasswordInput.setOnFocusChangeListener(this);
 284         mPasswordInput.setImeOptions(EditorInfo.IME_ACTION_DONE);
 285         mPasswordInput.setOnEditorActionListener(this);
 286     }
 287
 288     /**
 289      * Saves relevant state before {@link #onPause()}
 290      *
 291      * Do NOT save {@link #mNewCapturedUriFromOAuth2Redirection}; it keeps a temporal flag, intended to defer the
 292      * processing of the redirection caught in {@link #onNewIntent(Intent)} until {@link #onResume()}
 293      *
 294      * See {@link #loadSavedInstanceState(Bundle)}
 295      */
 296     @Override
 297     protected void onSaveInstanceState(Bundle outState) {
 298         super.onSaveInstanceState(outState);
 299
 300         /// connection state and info
 301         outState.putInt(KEY_SERVER_STATUS_TEXT, mServerStatusText);
 302         outState.putInt(KEY_SERVER_STATUS_ICON, mServerStatusIcon);
 303         outState.putBoolean(KEY_SERVER_VALID, mServerIsValid);
 304         outState.putBoolean(KEY_SERVER_CHECKED, mServerIsChecked);
 305         outState.putBoolean(KEY_SERVER_CHECK_IN_PROGRESS, (!mServerIsValid && mOcServerChkOperation != null));
 306         outState.putBoolean(KEY_IS_SSL_CONN, mIsSslConn);
 307         outState.putInt(KEY_AUTH_STATUS_ICON, mAuthStatusIcon);
 308         outState.putInt(KEY_AUTH_STATUS_TEXT, mAuthStatusText);
 309
 310         /// server data
 311         if (mDiscoveredVersion != null) {
 312             outState.putString(KEY_OC_VERSION, mDiscoveredVersion.toString());
 313         }
 314         outState.putString(KEY_HOST_URL_TEXT, mHostBaseUrl);
 315
 316         /// account data, if updating
 317         if (mAccount != null) {
 318             outState.putParcelable(KEY_ACCOUNT, mAccount);
 319         }
 320
 321     }
 322
 323
 324     /**
 325      * The redirection triggered by the OAuth authentication server as response to the GET AUTHORIZATION request
 326      * is caught here.
 327      *
 328      * To make this possible, this activity needs to be qualified with android:launchMode = "singleTask" in the
 329      * AndroidManifest.xml file.
 330      */
 331     @Override
 332     protected void onNewIntent (Intent intent) {
 333         Log_OC.d(TAG, "onNewIntent()");
 334         Uri data = intent.getData();
 335         if (data != null && data.toString().startsWith(getString(R.string.oauth2_redirect_uri))) {
 336             mNewCapturedUriFromOAuth2Redirection = data;
 337         }
 338     }
 339
 340
 341     /**
 342      * The redirection triggered by the OAuth authentication server as response to the GET AUTHORIZATION, and
 343      * deferred in {@link #onNewIntent(Intent)}, is processed here.
 344      */
 345     @Override
 346     protected void onResume() {
 347         super.onResume();
 348         // the state of mOAuth2Check is automatically recovered between configuration changes, but not before onCreate() finishes; so keep the next lines here
 349         changeViewByOAuth2Check(mOAuth2Check.isChecked());
 350         if (mAction == ACTION_UPDATE_TOKEN && mJustCreated) {
 351             if (mOAuth2Check.isChecked())
 352                 Toast.makeText(this, R.string.auth_expired_oauth_token_toast, Toast.LENGTH_LONG).show();
 353             else
 354                 Toast.makeText(this, R.string.auth_expired_basic_auth_toast, Toast.LENGTH_LONG).show();
 355         }
 356
 357         if (mNewCapturedUriFromOAuth2Redirection != null) {
 358             getOAuth2AccessTokenFromCapturedRedirection();
 359         }
 360
 361         mJustCreated = false;
 362     }
 363
 364
 365     /**
 366      * Parses the redirection with the response to the GET AUTHORIZATION request to the
 367      * oAuth server and requests for the access token (GET ACCESS TOKEN)
 368      */
 369     private void getOAuth2AccessTokenFromCapturedRedirection() {
 370         /// Parse data from OAuth redirection
 371         String queryParameters = mNewCapturedUriFromOAuth2Redirection.getQuery();
 372         mNewCapturedUriFromOAuth2Redirection = null;
 373
 374         /// Showing the dialog with instructions for the user.
 375         showDialog(DIALOG_OAUTH2_LOGIN_PROGRESS);
 376
 377         /// GET ACCESS TOKEN to the oAuth server
 378         RemoteOperation operation = new OAuth2GetAccessToken(   getString(R.string.oauth2_client_id),
 379                 getString(R.string.oauth2_redirect_uri),
 380                 getString(R.string.oauth2_grant_type),
 381                 queryParameters);
 382         //WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(getString(R.string.oauth2_url_endpoint_access)), getApplicationContext());
 383         WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mOAuthTokenEndpointText.getText().toString().trim()), getApplicationContext());
 384         operation.execute(client, this, mHandler);
 385     }
 386
 387
 388
 389     /**
 390      * Handles the change of focus on the text inputs for the server URL and the password
 391      */
 392     public void onFocusChange(View view, boolean hasFocus) {
 393         if (view.getId() == R.id.hostUrlInput) {
 394             if (!hasFocus) {
 395                 onUrlInputFocusLost((TextView) view);
 396             }
 397             else {
 398                 hideRefreshButton();
 399             }
 400
 401         } else if (view.getId() == R.id.account_password) {
 402             onPasswordFocusChanged((TextView) view, hasFocus);
 403         }
 404     }
 405
 406
 407     /**
 408      * Handles changes in focus on the text input for the server URL.
 409      *
 410      * IMPORTANT ENTRY POINT 2: When (!hasFocus), user wrote the server URL and changed to
 411      * other field. The operation to check the existence of the server in the entered URL is
 412      * started.
 413      *
 414      * When hasFocus:    user 'comes back' to write again the server URL.
 415      *
 416      * @param hostInput     TextView with the URL input field receiving the change of focus.
 417      */
 418     private void onUrlInputFocusLost(TextView hostInput) {
 419         if (!mHostBaseUrl.equals(normalizeUrl(mHostUrlInput.getText().toString()))) {
 420             checkOcServer();
 421         } else {
 422             mOkButton.setEnabled(mServerIsValid);
 423         }
 424     }
 425
 426
 427     private void checkOcServer() {
 428         String uri = trimUrlWebdav(mHostUrlInput.getText().toString().trim());
 429         mServerIsValid = false;
 430         mServerIsChecked = false;
 431         mOkButton.setEnabled(false);
 432         mDiscoveredVersion = null;
 433         hideRefreshButton();
 434         if (uri.length() != 0) {
 435             mServerStatusText = R.string.auth_testing_connection;
 436             mServerStatusIcon = R.drawable.progress_small;
 437             showServerStatus();
 438             mOcServerChkOperation = new  OwnCloudServerCheckOperation(uri, this);
 439             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(uri), this);
 440             mOperationThread = mOcServerChkOperation.execute(client, this, mHandler);
 441         } else {
 442             mServerStatusText = 0;
 443             mServerStatusIcon = 0;
 444             showServerStatus();
 445         }
 446     }
 447
 448
 449     /**
 450      * Handles changes in focus on the text input for the password (basic authorization).
 451      *
 452      * When (hasFocus), the button to toggle password visibility is shown.
 453      *
 454      * When (!hasFocus), the button is made invisible and the password is hidden.
 455      *
 456      * @param passwordInput    TextView with the password input field receiving the change of focus.
 457      * @param hasFocus          'True' if focus is received, 'false' if is lost
 458      */
 459     private void onPasswordFocusChanged(TextView passwordInput, boolean hasFocus) {
 460         if (hasFocus) {
 461             mViewPasswordButton.setVisibility(View.VISIBLE);
 462         } else {
 463             int input_type = InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD;
 464             passwordInput.setInputType(input_type);
 465             mViewPasswordButton.setVisibility(View.INVISIBLE);
 466         }
 467     }
 468
 469
 470
 471     /**
 472      * Cancels the authenticator activity
 473      *
 474      * IMPORTANT ENTRY POINT 3: Never underestimate the importance of cancellation
 475      *
 476      * This method is bound in the layout/acceoun_setup.xml resource file.
 477      *
 478      * @param view      Cancel button
 479      */
 480     public void onCancelClick(View view) {
 481         setResult(RESULT_CANCELED);     // TODO review how is this related to AccountAuthenticator (debugging)
 482         finish();
 483     }
 484
 485
 486
 487     /**
 488      * Checks the credentials of the user in the root of the ownCloud server
 489      * before creating a new local account.
 490      *
 491      * For basic authorization, a check of existence of the root folder is
 492      * performed.
 493      *
 494      * For OAuth, starts the flow to get an access token; the credentials test
 495      * is postponed until it is available.
 496      *
 497      * IMPORTANT ENTRY POINT 4
 498      *
 499      * @param view      OK button
 500      */
 501     public void onOkClick(View view) {
 502         // this check should be unnecessary
 503         if (mDiscoveredVersion == null || !mDiscoveredVersion.isVersionValid()  || mHostBaseUrl == null || mHostBaseUrl.length() == 0) {
 504             mServerStatusIcon = R.drawable.common_error;
 505             mServerStatusText = R.string.auth_wtf_reenter_URL;
 506             showServerStatus();
 507             mOkButton.setEnabled(false);
 508             Log_OC.wtf(TAG,  "The user was allowed to click 'connect' to an unchecked server!!");
 509             return;
 510         }
 511
 512         if (mOAuth2Check.isChecked()) {
 513             startOauthorization();
 514
 515         } else {
 516             checkBasicAuthorization();
 517         }
 518     }
 519
 520
 521     /**
 522      * Tests the credentials entered by the user performing a check of existence on
 523      * the root folder of the ownCloud server.
 524      */
 525     private void checkBasicAuthorization() {
 526         /// get the path to the root folder through WebDAV from the version server
 527         String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, false);
 528
 529         /// get basic credentials entered by user
 530         String username = mUsernameInput.getText().toString();
 531         String password = mPasswordInput.getText().toString();
 532
 533         /// be gentle with the user
 534         showDialog(DIALOG_LOGIN_PROGRESS);
 535
 536         /// test credentials accessing the root folder
 537         mAuthCheckOperation = new  ExistenceCheckOperation("", this, false);
 538         WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this);
 539         client.setBasicCredentials(username, password);
 540         mOperationThread = mAuthCheckOperation.execute(client, this, mHandler);
 541     }
 542
 543
 544     /**
 545      * Starts the OAuth 'grant type' flow to get an access token, with
 546      * a GET AUTHORIZATION request to the BUILT-IN authorization server.
 547      */
 548     private void startOauthorization() {
 549         // be gentle with the user
 550         mAuthStatusIcon = R.drawable.progress_small;
 551         mAuthStatusText = R.string.oauth_login_connection;
 552         showAuthStatus();
 553
 554         // GET AUTHORIZATION request
 555         //Uri uri = Uri.parse(getString(R.string.oauth2_url_endpoint_auth));
 556         Uri uri = Uri.parse(mOAuthAuthEndpointText.getText().toString().trim());
 557         Uri.Builder uriBuilder = uri.buildUpon();
 558         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_RESPONSE_TYPE, getString(R.string.oauth2_response_type));
 559         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_REDIRECT_URI, getString(R.string.oauth2_redirect_uri));
 560         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_CLIENT_ID, getString(R.string.oauth2_client_id));
 561         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_SCOPE, getString(R.string.oauth2_scope));
 562         //uriBuilder.appendQueryParameter(OAuth2Constants.KEY_STATE, whateverwewant);
 563         uri = uriBuilder.build();
 564         Log_OC.d(TAG, "Starting browser to view " + uri.toString());
 565         Intent i = new Intent(Intent.ACTION_VIEW, uri);
 566         startActivity(i);
 567     }
 568
 569
 570     /**
 571      * Callback method invoked when a RemoteOperation executed by this Activity finishes.
 572      *
 573      * Dispatches the operation flow to the right method.
 574      */
 575     @Override
 576     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 577
 578         if (operation instanceof OwnCloudServerCheckOperation) {
 579             onOcServerCheckFinish((OwnCloudServerCheckOperation) operation, result);
 580
 581         } else if (operation instanceof OAuth2GetAccessToken) {
 582             onGetOAuthAccessTokenFinish((OAuth2GetAccessToken)operation, result);
 583
 584         } else if (operation instanceof ExistenceCheckOperation)  {
 585             onAuthorizationCheckFinish((ExistenceCheckOperation)operation, result);
 586
 587         }
 588     }
 589
 590
 591     /**
 592      * Processes the result of the server check performed when the user finishes the enter of the
 593      * server URL.
 594      *
 595      * @param operation     Server check performed.
 596      * @param result        Result of the check.
 597      */
 598     private void onOcServerCheckFinish(OwnCloudServerCheckOperation operation, RemoteOperationResult result) {
 599         if (operation.equals(mOcServerChkOperation)) {
 600             /// save result state
 601             mServerIsChecked = true;
 602             mServerIsValid = result.isSuccess();
 603             mIsSslConn = (result.getCode() == ResultCode.OK_SSL);
 604             mOcServerChkOperation = null;
 605
 606             /// update status icon and text
 607             if (mServerIsValid) {
 608                 hideRefreshButton();
 609             } else {
 610                 showRefreshButton();
 611             }
 612             updateServerStatusIconAndText(result);
 613             showServerStatus();
 614
 615             /// very special case (TODO: move to a common place for all the remote operations)
 616             if (result.getCode() == ResultCode.SSL_RECOVERABLE_PEER_UNVERIFIED) {
 617                 mLastSslUntrustedServerResult = result;
 618                 showDialog(DIALOG_SSL_VALIDATOR);
 619             }
 620
 621             /// retrieve discovered version and normalize server URL
 622             mDiscoveredVersion = operation.getDiscoveredVersion();
 623             mHostBaseUrl = normalizeUrl(mHostUrlInput.getText().toString());
 624
 625             /// allow or not the user try to access the server
 626             mOkButton.setEnabled(mServerIsValid);
 627
 628         }   // else nothing ; only the last check operation is considered;
 629         // multiple can be triggered if the user amends a URL before a previous check can be triggered
 630     }
 631
 632
 633     private String normalizeUrl(String url) {
 634         if (url != null && url.length() > 0) {
 635             url = url.trim();
 636             if (!url.toLowerCase().startsWith("http://") &&
 637                     !url.toLowerCase().startsWith("https://")) {
 638                 if (mIsSslConn) {
 639                     url = "https://" + url;
 640                 } else {
 641                     url = "http://" + url;
 642                 }
 643             }
 644
 645             // OC-208: Add suffix remote.php/webdav to normalize (OC-34)
 646             url = trimUrlWebdav(url);
 647
 648             if (url.endsWith("/")) {
 649                 url = url.substring(0, url.length() - 1);
 650             }
 651
 652         }
 653         Log_OC.d(TAG, "URL Normalize " + url);
 654         return (url != null ? url : "");
 655     }
 656
 657
 658     private String trimUrlWebdav(String url){
 659         if(url.toLowerCase().endsWith(AccountUtils.WEBDAV_PATH_4_0)){
 660             url = url.substring(0, url.length() - AccountUtils.WEBDAV_PATH_4_0.length());
 661         } else if(url.toLowerCase().endsWith(AccountUtils.WEBDAV_PATH_2_0)){
 662             url = url.substring(0, url.length() - AccountUtils.WEBDAV_PATH_2_0.length());
 663         } else if (url.toLowerCase().endsWith(AccountUtils.WEBDAV_PATH_1_2)){
 664             url = url.substring(0, url.length() - AccountUtils.WEBDAV_PATH_1_2.length());
 665         }
 666         return (url != null ? url : "");
 667     }
 668
 669
 670     /**
 671      * Chooses the right icon and text to show to the user for the received operation result.
 672      *
 673      * @param result    Result of a remote operation performed in this activity
 674      */
 675     private void updateServerStatusIconAndText(RemoteOperationResult result) {
 676         mServerStatusIcon = R.drawable.common_error;    // the most common case in the switch below
 677
 678         switch (result.getCode()) {
 679         case OK_SSL:
 680             mServerStatusIcon = android.R.drawable.ic_secure;
 681             mServerStatusText = R.string.auth_secure_connection;
 682             break;
 683
 684         case OK_NO_SSL:
 685         case OK:
 686             if (mHostUrlInput.getText().toString().trim().toLowerCase().startsWith("http://") ) {
 687                 mServerStatusText = R.string.auth_connection_established;
 688                 mServerStatusIcon = R.drawable.ic_ok;
 689             } else {
 690                 mServerStatusText = R.string.auth_nossl_plain_ok_title;
 691                 mServerStatusIcon = android.R.drawable.ic_partial_secure;
 692             }
 693             break;
 694
 695         case NO_NETWORK_CONNECTION:
 696             mServerStatusIcon = R.drawable.no_network;
 697             mServerStatusText = R.string.auth_no_net_conn_title;
 698             break;
 699
 700         case SSL_RECOVERABLE_PEER_UNVERIFIED:
 701             mServerStatusText = R.string.auth_ssl_unverified_server_title;
 702             break;
 703         case BAD_OC_VERSION:
 704             mServerStatusText = R.string.auth_bad_oc_version_title;
 705             break;
 706         case WRONG_CONNECTION:
 707             mServerStatusText = R.string.auth_wrong_connection_title;
 708             break;
 709         case TIMEOUT:
 710             mServerStatusText = R.string.auth_timeout_title;
 711             break;
 712         case INCORRECT_ADDRESS:
 713             mServerStatusText = R.string.auth_incorrect_address_title;
 714             break;
 715         case SSL_ERROR:
 716             mServerStatusText = R.string.auth_ssl_general_error_title;
 717             break;
 718         case UNAUTHORIZED:
 719             mServerStatusText = R.string.auth_unauthorized;
 720             break;
 721         case HOST_NOT_AVAILABLE:
 722             mServerStatusText = R.string.auth_unknown_host_title;
 723             break;
 724         case INSTANCE_NOT_CONFIGURED:
 725             mServerStatusText = R.string.auth_not_configured_title;
 726             break;
 727         case FILE_NOT_FOUND:
 728             mServerStatusText = R.string.auth_incorrect_path_title;
 729             break;
 730         case OAUTH2_ERROR:
 731             mServerStatusText = R.string.auth_oauth_error;
 732             break;
 733         case OAUTH2_ERROR_ACCESS_DENIED:
 734             mServerStatusText = R.string.auth_oauth_error_access_denied;
 735             break;
 736         case UNHANDLED_HTTP_CODE:
 737         case UNKNOWN_ERROR:
 738             mServerStatusText = R.string.auth_unknown_error_title;
 739             break;
 740         default:
 741             mServerStatusText = 0;
 742             mServerStatusIcon = 0;
 743         }
 744     }
 745
 746
 747     /**
 748      * Chooses the right icon and text to show to the user for the received operation result.
 749      *
 750      * @param result    Result of a remote operation performed in this activity
 751      */
 752     private void updateAuthStatusIconAndText(RemoteOperationResult result) {
 753         mAuthStatusIcon = R.drawable.common_error;    // the most common case in the switch below
 754
 755         switch (result.getCode()) {
 756         case OK_SSL:
 757             mAuthStatusIcon = android.R.drawable.ic_secure;
 758             mAuthStatusText = R.string.auth_secure_connection;
 759             break;
 760
 761         case OK_NO_SSL:
 762         case OK:
 763             if (mHostUrlInput.getText().toString().trim().toLowerCase().startsWith("http://") ) {
 764                 mAuthStatusText = R.string.auth_connection_established;
 765                 mAuthStatusIcon = R.drawable.ic_ok;
 766             } else {
 767                 mAuthStatusText = R.string.auth_nossl_plain_ok_title;
 768                 mAuthStatusIcon = android.R.drawable.ic_partial_secure;
 769             }
 770             break;
 771
 772         case NO_NETWORK_CONNECTION:
 773             mAuthStatusIcon = R.drawable.no_network;
 774             mAuthStatusText = R.string.auth_no_net_conn_title;
 775             break;
 776
 777         case SSL_RECOVERABLE_PEER_UNVERIFIED:
 778             mAuthStatusText = R.string.auth_ssl_unverified_server_title;
 779             break;
 780         case BAD_OC_VERSION:
 781             mAuthStatusText = R.string.auth_bad_oc_version_title;
 782             break;
 783         case WRONG_CONNECTION:
 784             mAuthStatusText = R.string.auth_wrong_connection_title;
 785             break;
 786         case TIMEOUT:
 787             mAuthStatusText = R.string.auth_timeout_title;
 788             break;
 789         case INCORRECT_ADDRESS:
 790             mAuthStatusText = R.string.auth_incorrect_address_title;
 791             break;
 792         case SSL_ERROR:
 793             mAuthStatusText = R.string.auth_ssl_general_error_title;
 794             break;
 795         case UNAUTHORIZED:
 796             mAuthStatusText = R.string.auth_unauthorized;
 797             break;
 798         case HOST_NOT_AVAILABLE:
 799             mAuthStatusText = R.string.auth_unknown_host_title;
 800             break;
 801         case INSTANCE_NOT_CONFIGURED:
 802             mAuthStatusText = R.string.auth_not_configured_title;
 803             break;
 804         case FILE_NOT_FOUND:
 805             mAuthStatusText = R.string.auth_incorrect_path_title;
 806             break;
 807         case OAUTH2_ERROR:
 808             mAuthStatusText = R.string.auth_oauth_error;
 809             break;
 810         case OAUTH2_ERROR_ACCESS_DENIED:
 811             mAuthStatusText = R.string.auth_oauth_error_access_denied;
 812             break;
 813         case UNHANDLED_HTTP_CODE:
 814         case UNKNOWN_ERROR:
 815             mAuthStatusText = R.string.auth_unknown_error_title;
 816             break;
 817         default:
 818             mAuthStatusText = 0;
 819             mAuthStatusIcon = 0;
 820         }
 821     }
 822
 823
 824     /**
 825      * Processes the result of the request for and access token send
 826      * to an OAuth authorization server.
 827      *
 828      * @param operation     Operation performed requesting the access token.
 829      * @param result        Result of the operation.
 830      */
 831     private void onGetOAuthAccessTokenFinish(OAuth2GetAccessToken operation, RemoteOperationResult result) {
 832         try {
 833             dismissDialog(DIALOG_OAUTH2_LOGIN_PROGRESS);
 834         } catch (IllegalArgumentException e) {
 835             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 836         }
 837
 838         String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, true);
 839         if (result.isSuccess() && webdav_path != null) {
 840             /// be gentle with the user
 841             showDialog(DIALOG_LOGIN_PROGRESS);
 842
 843             /// time to test the retrieved access token on the ownCloud server
 844             mOAuthAccessToken = ((OAuth2GetAccessToken)operation).getResultTokenMap().get(OAuth2Constants.KEY_ACCESS_TOKEN);
 845             Log_OC.d(TAG, "Got ACCESS TOKEN: " + mOAuthAccessToken);
 846             mAuthCheckOperation = new ExistenceCheckOperation("", this, false);
 847             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this);
 848             client.setBearerCredentials(mOAuthAccessToken);
 849             mAuthCheckOperation.execute(client, this, mHandler);
 850
 851         } else {
 852             updateAuthStatusIconAndText(result);
 853             showAuthStatus();
 854             Log_OC.d(TAG, "Access failed: " + result.getLogMessage());
 855         }
 856     }
 857
 858
 859     /**
 860      * Processes the result of the access check performed to try the user credentials.
 861      *
 862      * Creates a new account through the AccountManager.
 863      *
 864      * @param operation     Access check performed.
 865      * @param result        Result of the operation.
 866      */
 867     private void onAuthorizationCheckFinish(ExistenceCheckOperation operation, RemoteOperationResult result) {
 868         try {
 869             dismissDialog(DIALOG_LOGIN_PROGRESS);
 870         } catch (IllegalArgumentException e) {
 871             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 872         }
 873
 874         if (result.isSuccess()) {
 875             Log_OC.d(TAG, "Successful access - time to save the account");
 876
 877             if (mAction == ACTION_CREATE) {
 878                 createAccount();
 879
 880             } else {
 881                 updateToken();
 882             }
 883
 884             finish();
 885
 886         } else {
 887             updateAuthStatusIconAndText(result);
 888             showAuthStatus();
 889             Log_OC.d(TAG, "Access failed: " + result.getLogMessage());
 890         }
 891     }
 892
 893
 894     /**
 895      * Sets the proper response to get that the Account Authenticator that started this activity saves
 896      * a new authorization token for mAccount.
 897      */
 898     private void updateToken() {
 899         Bundle response = new Bundle();
 900         response.putString(AccountManager.KEY_ACCOUNT_NAME, mAccount.name);
 901         response.putString(AccountManager.KEY_ACCOUNT_TYPE, mAccount.type);
 902         boolean isOAuth = mOAuth2Check.isChecked();
 903         if (isOAuth) {
 904             response.putString(AccountManager.KEY_AUTHTOKEN, mOAuthAccessToken);
 905             // the next line is necessary; by now, notifications are calling directly to the AuthenticatorActivity to update, without AccountManager intervention
 906             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
 907         } else {
 908             response.putString(AccountManager.KEY_AUTHTOKEN, mPasswordInput.getText().toString());
 909             mAccountMgr.setPassword(mAccount, mPasswordInput.getText().toString());
 910         }
 911         setAccountAuthenticatorResult(response);
 912     }
 913
 914
 915     /**
 916      * Creates a new account through the Account Authenticator that started this activity.
 917      *
 918      * This makes the account permanent.
 919      *
 920      * TODO Decide how to name the OAuth accounts
 921      */
 922     private void createAccount() {
 923         /// create and save new ownCloud account
 924         boolean isOAuth = mOAuth2Check.isChecked();
 925
 926         Uri uri = Uri.parse(mHostBaseUrl);
 927         String username = mUsernameInput.getText().toString().trim();
 928         if (isOAuth) {
 929             username = "OAuth_user" + (new java.util.Random(System.currentTimeMillis())).nextLong();
 930         }
 931         String accountName = username + "@" + uri.getHost();
 932         if (uri.getPort() >= 0) {
 933             accountName += ":" + uri.getPort();
 934         }
 935         mAccount = new Account(accountName, AccountAuthenticator.ACCOUNT_TYPE);
 936         if (isOAuth) {
 937             mAccountMgr.addAccountExplicitly(mAccount, "", null);  // with our implementation, the password is never input in the app
 938         } else {
 939             mAccountMgr.addAccountExplicitly(mAccount, mPasswordInput.getText().toString(), null);
 940         }
 941
 942         /// add the new account as default in preferences, if there is none already
 943         Account defaultAccount = AccountUtils.getCurrentOwnCloudAccount(this);
 944         if (defaultAccount == null) {
 945             SharedPreferences.Editor editor = PreferenceManager
 946                     .getDefaultSharedPreferences(this).edit();
 947             editor.putString("select_oc_account", accountName);
 948             editor.commit();
 949         }
 950
 951         /// prepare result to return to the Authenticator
 952         //  TODO check again what the Authenticator makes with it; probably has the same effect as addAccountExplicitly, but it's not well done
 953         final Intent intent = new Intent();
 954         intent.putExtra(AccountManager.KEY_ACCOUNT_TYPE,    AccountAuthenticator.ACCOUNT_TYPE);
 955         intent.putExtra(AccountManager.KEY_ACCOUNT_NAME,    mAccount.name);
 956         if (!isOAuth)
 957             intent.putExtra(AccountManager.KEY_AUTHTOKEN,   AccountAuthenticator.ACCOUNT_TYPE); // TODO check this; not sure it's right; maybe
 958         intent.putExtra(AccountManager.KEY_USERDATA,        username);
 959         if (isOAuth) {
 960             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
 961         }
 962         /// add user data to the new account; TODO probably can be done in the last parameter addAccountExplicitly, or in KEY_USERDATA
 963         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_VERSION,    mDiscoveredVersion.toString());
 964         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_BASE_URL,   mHostBaseUrl);
 965         if (isOAuth)
 966             mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_SUPPORTS_OAUTH2, "TRUE");  // TODO this flag should be unnecessary
 967
 968         setAccountAuthenticatorResult(intent.getExtras());
 969         setResult(RESULT_OK, intent);
 970
 971         /// immediately request for the synchronization of the new account
 972         Bundle bundle = new Bundle();
 973         bundle.putBoolean(ContentResolver.SYNC_EXTRAS_MANUAL, true);
 974         ContentResolver.requestSync(mAccount, AccountAuthenticator.AUTHORITY, bundle);
 975     }
 976
 977
 978     /**
 979      * {@inheritDoc}
 980      *
 981      * Necessary to update the contents of the SSL Dialog
 982      *
 983      * TODO move to some common place for all possible untrusted SSL failures
 984      */
 985     @Override
 986     protected void onPrepareDialog(int id, Dialog dialog, Bundle args) {
 987         switch (id) {
 988         case DIALOG_LOGIN_PROGRESS:
 989         case DIALOG_CERT_NOT_SAVED:
 990         case DIALOG_OAUTH2_LOGIN_PROGRESS:
 991             break;
 992         case DIALOG_SSL_VALIDATOR: {
 993             ((SslValidatorDialog)dialog).updateResult(mLastSslUntrustedServerResult);
 994             break;
 995         }
 996         default:
 997             Log_OC.e(TAG, "Incorrect dialog called with id = " + id);
 998         }
 999     }
1000
1001
1002     /**
1003      * {@inheritDoc}
1004      */
1005     @Override
1006     protected Dialog onCreateDialog(int id) {
1007         Dialog dialog = null;
1008         switch (id) {
1009         case DIALOG_LOGIN_PROGRESS: {
1010             /// simple progress dialog
1011             ProgressDialog working_dialog = new ProgressDialog(this);
1012             working_dialog.setMessage(getResources().getString(R.string.auth_trying_to_login));
1013             working_dialog.setIndeterminate(true);
1014             working_dialog.setCancelable(true);
1015             working_dialog
1016             .setOnCancelListener(new DialogInterface.OnCancelListener() {
1017                 @Override
1018                 public void onCancel(DialogInterface dialog) {
1019                     /// TODO study if this is enough
1020                     Log_OC.i(TAG, "Login canceled");
1021                     if (mOperationThread != null) {
1022                         mOperationThread.interrupt();
1023                         finish();
1024                     }
1025                 }
1026             });
1027             dialog = working_dialog;
1028             break;
1029         }
1030         case DIALOG_OAUTH2_LOGIN_PROGRESS: {
1031             ProgressDialog working_dialog = new ProgressDialog(this);
1032             working_dialog.setMessage(String.format("Getting authorization"));
1033             working_dialog.setIndeterminate(true);
1034             working_dialog.setCancelable(true);
1035             working_dialog
1036             .setOnCancelListener(new DialogInterface.OnCancelListener() {
1037                 @Override
1038                 public void onCancel(DialogInterface dialog) {
1039                     Log_OC.i(TAG, "Login canceled");
1040                     finish();
1041                 }
1042             });
1043             dialog = working_dialog;
1044             break;
1045         }
1046         case DIALOG_SSL_VALIDATOR: {
1047             /// TODO start to use new dialog interface, at least for this (it is a FragmentDialog already)
1048             dialog = SslValidatorDialog.newInstance(this, mLastSslUntrustedServerResult, this);
1049             break;
1050         }
1051         case DIALOG_CERT_NOT_SAVED: {
1052             AlertDialog.Builder builder = new AlertDialog.Builder(this);
1053             builder.setMessage(getResources().getString(R.string.ssl_validator_not_saved));
1054             builder.setCancelable(false);
1055             builder.setPositiveButton(R.string.common_ok, new DialogInterface.OnClickListener() {
1056                 @Override
1057                 public void onClick(DialogInterface dialog, int which) {
1058                     dialog.dismiss();
1059                 };
1060             });
1061             dialog = builder.create();
1062             break;
1063         }
1064         default:
1065             Log_OC.e(TAG, "Incorrect dialog called with id = " + id);
1066         }
1067         return dialog;
1068     }
1069
1070
1071     /**
1072      * Starts and activity to open the 'new account' page in the ownCloud web site
1073      *
1074      * @param view      'Account register' button
1075      */
1076     public void onRegisterClick(View view) {
1077         Intent register = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.url_account_register)));
1078         setResult(RESULT_CANCELED);
1079         startActivity(register);
1080     }
1081
1082
1083     /**
1084      * Updates the content and visibility state of the icon and text associated
1085      * to the last check on the ownCloud server.
1086      */
1087     private void showServerStatus() {
1088         TextView tv = (TextView) findViewById(R.id.server_status_text);
1089
1090         if (mServerStatusIcon == 0 && mServerStatusText == 0) {
1091             tv.setVisibility(View.INVISIBLE);
1092
1093         } else {
1094             tv.setText(mServerStatusText);
1095             tv.setCompoundDrawablesWithIntrinsicBounds(mServerStatusIcon, 0, 0, 0);
1096             tv.setVisibility(View.VISIBLE);
1097         }
1098
1099     }
1100
1101
1102     /**
1103      * Updates the content and visibility state of the icon and text associated
1104      * to the interactions with the OAuth authorization server.
1105      */
1106     private void showAuthStatus() {
1107         if (mAuthStatusIcon == 0 && mAuthStatusText == 0) {
1108             mAuthStatusLayout.setVisibility(View.INVISIBLE);
1109
1110         } else {
1111             mAuthStatusLayout.setText(mAuthStatusText);
1112             mAuthStatusLayout.setCompoundDrawablesWithIntrinsicBounds(mAuthStatusIcon, 0, 0, 0);
1113             mAuthStatusLayout.setVisibility(View.VISIBLE);
1114         }
1115     }
1116
1117
1118     private void showRefreshButton() {
1119         mHostUrlInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_action_refresh_black, 0);
1120     }
1121
1122     private void hideRefreshButton() {
1123         mHostUrlInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0);
1124     }
1125
1126     /**
1127      * Called when the refresh button in the input field for ownCloud host is clicked.
1128      *
1129      * Performs a new check on the URL in the input field.
1130      *
1131      * @param view      Refresh 'button'
1132      */
1133     public void onRefreshClick(View view) {
1134         checkOcServer();
1135     }
1136
1137
1138     /**
1139      * Called when the eye icon in the password field is clicked.
1140      *
1141      * Toggles the visibility of the password in the field.
1142      *
1143      * @param view      'View password' 'button'
1144      */
1145     public void onViewPasswordClick(View view) {
1146         int selectionStart = mPasswordInput.getSelectionStart();
1147         int selectionEnd = mPasswordInput.getSelectionEnd();
1148         int input_type = mPasswordInput.getInputType();
1149         if ((input_type & InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD) == InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD) {
1150             input_type = InputType.TYPE_CLASS_TEXT
1151                     | InputType.TYPE_TEXT_VARIATION_PASSWORD;
1152         } else {
1153             input_type = InputType.TYPE_CLASS_TEXT
1154                     | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD;
1155         }
1156         mPasswordInput.setInputType(input_type);
1157         mPasswordInput.setSelection(selectionStart, selectionEnd);
1158     }
1159
1160
1161     /**
1162      * Called when the checkbox for OAuth authorization is clicked.
1163      *
1164      * Hides or shows the input fields for user & password.
1165      *
1166      * @param view      'View password' 'button'
1167      */
1168     public void onCheckClick(View view) {
1169         CheckBox oAuth2Check = (CheckBox)view;
1170         changeViewByOAuth2Check(oAuth2Check.isChecked());
1171
1172     }
1173
1174     /**
1175      * Changes the visibility of input elements depending upon the kind of authorization
1176      * chosen by the user: basic or OAuth
1177      *
1178      * @param checked       'True' when OAuth is selected.
1179      */
1180     public void changeViewByOAuth2Check(Boolean checked) {
1181
1182         if (checked) {
1183             mOAuthAuthEndpointText.setVisibility(View.VISIBLE);
1184             mOAuthTokenEndpointText.setVisibility(View.VISIBLE);
1185             mUsernameInput.setVisibility(View.GONE);
1186             mPasswordInput.setVisibility(View.GONE);
1187             mViewPasswordButton.setVisibility(View.GONE);
1188         } else {
1189             mOAuthAuthEndpointText.setVisibility(View.GONE);
1190             mOAuthTokenEndpointText.setVisibility(View.GONE);
1191             mUsernameInput.setVisibility(View.VISIBLE);
1192             mPasswordInput.setVisibility(View.VISIBLE);
1193             mViewPasswordButton.setVisibility(View.INVISIBLE);
1194         }
1195
1196     }
1197
1198     /**
1199      * Called from SslValidatorDialog when a new server certificate was correctly saved.
1200      */
1201     public void onSavedCertificate() {
1202         mOperationThread = mOcServerChkOperation.retry(this, mHandler);
1203     }
1204
1205     /**
1206      * Called from SslValidatorDialog when a new server certificate could not be saved
1207      * when the user requested it.
1208      */
1209     @Override
1210     public void onFailedSavingCertificate() {
1211         showDialog(DIALOG_CERT_NOT_SAVED);
1212     }
1213
1214
1215     /**
1216      *  Called when the 'action' button in an IME is pressed ('enter' in software keyboard).
1217      *
1218      *  Used to trigger the authorization check when the user presses 'enter' after writing the password.
1219      */
1220     @Override
1221     public boolean onEditorAction(TextView inputField, int actionId, KeyEvent event) {
1222         if (inputField != null && inputField.equals(mPasswordInput) &&
1223                 actionId == EditorInfo.IME_ACTION_DONE) {
1224             if (mOkButton.isEnabled()) {
1225                 mOkButton.performClick();
1226             }
1227         }
1228         return false;   // always return false to grant that the software keyboard is hidden anyway
1229     }
1230
1231
1232     private abstract static class RightDrawableOnTouchListener implements OnTouchListener  {
1233
1234         private int fuzz = 10;
1235
1236         /**
1237          * {@inheritDoc}
1238          */
1239         @Override
1240         public boolean onTouch(View view, MotionEvent event) {
1241             if (event.getAction() == MotionEvent.ACTION_DOWN) {
1242                 Drawable rightDrawable = null;
1243                 if (view instanceof TextView) {
1244                     Drawable[] drawables = ((TextView)view).getCompoundDrawables();
1245                     if (drawables.length > 2) {
1246                         rightDrawable = drawables[2];
1247                     }
1248                 }
1249                 if (rightDrawable != null) {
1250                     final int x = (int) event.getX();
1251                     final int y = (int) event.getY();
1252                     final Rect bounds = rightDrawable.getBounds();
1253                     if (x >= (view.getRight() - bounds.width() - fuzz) && x <= (view.getRight() - view.getPaddingRight() + fuzz)
1254                             && y >= (view.getPaddingTop() - fuzz) && y <= (view.getHeight() - view.getPaddingBottom()) + fuzz) {
1255
1256                         return onDrawableTouch(event);
1257                     }
1258                 }
1259             }
1260             return false;
1261         }
1262
1263         public abstract boolean onDrawableTouch(final MotionEvent event);
1264     }
1265
1266 }