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 java.security.spec.MGF1ParameterSpec;
  22
  23 import com.owncloud.android.AccountUtils;
  24 import com.owncloud.android.Log_OC;
  25 import com.owncloud.android.ui.dialog.SslValidatorDialog;
  26 import com.owncloud.android.ui.dialog.SslValidatorDialog.OnSslValidatorListener;
  27 import com.owncloud.android.utils.OwnCloudVersion;
  28 import com.owncloud.android.network.OwnCloudClientUtils;
  29 import com.owncloud.android.operations.OwnCloudServerCheckOperation;
  30 import com.owncloud.android.operations.ExistenceCheckOperation;
  31 import com.owncloud.android.operations.OAuth2GetAccessToken;
  32 import com.owncloud.android.operations.OnRemoteOperationListener;
  33 import com.owncloud.android.operations.RemoteOperation;
  34 import com.owncloud.android.operations.RemoteOperationResult;
  35 import com.owncloud.android.operations.RemoteOperationResult.ResultCode;
  36
  37 import android.accounts.Account;
  38 import android.accounts.AccountAuthenticatorActivity;
  39 import android.accounts.AccountManager;
  40 import android.app.AlertDialog;
  41 import android.app.Dialog;
  42 import android.app.ProgressDialog;
  43 import android.content.ContentResolver;
  44 import android.content.DialogInterface;
  45 import android.content.Intent;
  46 import android.content.SharedPreferences;
  47 import android.graphics.Rect;
  48 import android.graphics.drawable.Drawable;
  49 import android.net.Uri;
  50 import android.os.Bundle;
  51 import android.os.Handler;
  52 import android.preference.PreferenceManager;
  53 import android.text.Editable;
  54 import android.text.InputType;
  55 import android.text.TextWatcher;
  56 import android.view.KeyEvent;
  57 import android.view.MotionEvent;
  58 import android.view.View;
  59 import android.view.View.OnFocusChangeListener;
  60 import android.view.View.OnTouchListener;
  61 import android.view.Window;
  62 import android.view.inputmethod.EditorInfo;
  63 import android.widget.CheckBox;
  64 import android.widget.EditText;
  65 import android.widget.Button;
  66 import android.widget.ImageButton;
  67 import android.widget.TextView;
  68 import android.widget.Toast;
  69 import android.widget.TextView.OnEditorActionListener;
  70
  71 import com.owncloud.android.R;
  72
  73 import eu.alefzero.webdav.WebdavClient;
  74
  75 /**
  76  * This Activity is used to add an ownCloud account to the App
  77  *
  78  * @author Bartek Przybylski
  79  * @author David A. Velasco
  80  */
  81 public class AuthenticatorActivity extends AccountAuthenticatorActivity
  82 implements  OnRemoteOperationListener, OnSslValidatorListener, OnFocusChangeListener, OnEditorActionListener {
  83
  84     private static final String TAG = AuthenticatorActivity.class.getSimpleName();
  85
  86     public static final String EXTRA_ACCOUNT = "ACCOUNT";
  87     public static final String EXTRA_USER_NAME = "USER_NAME";
  88     public static final String EXTRA_HOST_NAME = "HOST_NAME";
  89     public static final String EXTRA_ACTION = "ACTION";
  90     public static final String EXTRA_ENFORCED_UPDATE = "ENFORCE_UPDATE";
  91
  92     private static final String KEY_HOST_URL_TEXT = "HOST_URL_TEXT";
  93     private static final String KEY_OC_VERSION = "OC_VERSION";
  94     private static final String KEY_ACCOUNT = "ACCOUNT";
  95     private static final String KEY_SERVER_VALID = "SERVER_VALID";
  96     private static final String KEY_SERVER_CHECKED = "SERVER_CHECKED";
  97     private static final String KEY_SERVER_CHECK_IN_PROGRESS = "SERVER_CHECK_IN_PROGRESS";
  98     private static final String KEY_SERVER_STATUS_TEXT = "SERVER_STATUS_TEXT";
  99     private static final String KEY_SERVER_STATUS_ICON = "SERVER_STATUS_ICON";
 100     private static final String KEY_IS_SSL_CONN = "IS_SSL_CONN";
 101     private static final String KEY_PASSWORD_VISIBLE = "PASSWORD_VISIBLE";
 102     private static final String KEY_AUTH_STATUS_TEXT = "AUTH_STATUS_TEXT";
 103     private static final String KEY_AUTH_STATUS_ICON = "AUTH_STATUS_ICON";
 104     private static final String KEY_REFRESH_BUTTON_ENABLED = "KEY_REFRESH_BUTTON_ENABLED";
 105
 106     private static final String OAUTH_MODE_ON = "on";
 107     private static final String OAUTH_MODE_OFF = "off";
 108     private static final String OAUTH_MODE_OPTIONAL = "optional";
 109
 110     private static final int DIALOG_LOGIN_PROGRESS = 0;
 111     private static final int DIALOG_SSL_VALIDATOR = 1;
 112     private static final int DIALOG_CERT_NOT_SAVED = 2;
 113     private static final int DIALOG_OAUTH2_LOGIN_PROGRESS = 3;
 114
 115     public static final byte ACTION_CREATE = 0;
 116     public static final byte ACTION_UPDATE_TOKEN = 1;
 117
 118     private String mHostBaseUrl;
 119     private OwnCloudVersion mDiscoveredVersion;
 120
 121     private int mServerStatusText, mServerStatusIcon;
 122     private boolean mServerIsChecked, mServerIsValid, mIsSslConn;
 123     private int mAuthStatusText, mAuthStatusIcon;
 124
 125     private final Handler mHandler = new Handler();
 126     private Thread mOperationThread;
 127     private OwnCloudServerCheckOperation mOcServerChkOperation;
 128     private ExistenceCheckOperation mAuthCheckOperation;
 129     private RemoteOperationResult mLastSslUntrustedServerResult;
 130
 131     private Uri mNewCapturedUriFromOAuth2Redirection;
 132
 133     private AccountManager mAccountMgr;
 134     private boolean mJustCreated;
 135     private byte mAction;
 136     private Account mAccount;
 137
 138     private EditText mHostUrlInput;
 139     private ImageButton mRefreshButton;
 140     private EditText mUsernameInput;
 141     private EditText mPasswordInput;
 142     private CheckBox mOAuth2Check;
 143     private String mOAuthAccessToken;
 144     private View mOkButton;
 145     private TextView mAuthStatusLayout;
 146
 147     private TextView mOAuthAuthEndpointText;
 148     private TextView mOAuthTokenEndpointText;
 149
 150     private boolean mRefreshButtonEnabled;
 151
 152
 153     /**
 154      * {@inheritDoc}
 155      *
 156      * IMPORTANT ENTRY POINT 1: activity is shown to the user
 157      */
 158     @Override
 159     protected void onCreate(Bundle savedInstanceState) {
 160         super.onCreate(savedInstanceState);
 161         getWindow().requestFeature(Window.FEATURE_NO_TITLE);
 162
 163         /// set view and get references to view elements
 164         setContentView(R.layout.account_setup);
 165         mHostUrlInput = (EditText) findViewById(R.id.hostUrlInput);
 166         mRefreshButton = (ImageButton) findViewById(R.id.refeshButton);
 167         mUsernameInput = (EditText) findViewById(R.id.account_username);
 168         mPasswordInput = (EditText) findViewById(R.id.account_password);
 169         mOAuthAuthEndpointText = (TextView)findViewById(R.id.oAuthEntryPoint_1);
 170         mOAuthTokenEndpointText = (TextView)findViewById(R.id.oAuthEntryPoint_2);
 171         mOAuth2Check = (CheckBox) findViewById(R.id.oauth_onOff_check);
 172         mOkButton = findViewById(R.id.buttonOK);
 173         mAuthStatusLayout = (TextView) findViewById(R.id.auth_status_text);
 174
 175         /// complete label for 'register account' button
 176         Button b = (Button) findViewById(R.id.account_register);
 177         if (b != null) {
 178             b.setText(String.format(getString(R.string.auth_register), getString(R.string.app_name)));
 179         }
 180
 181         /// initialization
 182         mAccountMgr = AccountManager.get(this);
 183         mNewCapturedUriFromOAuth2Redirection = null;
 184         mAction = getIntent().getByteExtra(EXTRA_ACTION, ACTION_CREATE);
 185         mAccount = null;
 186         mHostBaseUrl = "";
 187         boolean refreshButtonEnabled = false;
 188
 189         if (savedInstanceState == null) {
 190             /// connection state and info
 191             mServerStatusText = mServerStatusIcon = 0;
 192             mServerIsValid = false;
 193             mServerIsChecked = false;
 194             mIsSslConn = false;
 195             mAuthStatusText = mAuthStatusIcon = 0;
 196
 197             /// retrieve extras from intent
 198             String tokenType = getIntent().getExtras().getString(AccountAuthenticator.KEY_AUTH_TOKEN_TYPE);
 199             boolean oAuthRequired = AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN.equals(tokenType) || OAUTH_MODE_ON.equals(getString(R.string.oauth2_mode));
 200
 201             mAccount = getIntent().getExtras().getParcelable(EXTRA_ACCOUNT);
 202             if (mAccount != null) {
 203                 String ocVersion = mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_OC_VERSION);
 204                 if (ocVersion != null) {
 205                     mDiscoveredVersion = new OwnCloudVersion(ocVersion);
 206                 }
 207                 mHostBaseUrl = normalizeUrl(mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_OC_BASE_URL));
 208                 mHostUrlInput.setText(mHostBaseUrl);
 209                 String userName = mAccount.name.substring(0, mAccount.name.lastIndexOf('@'));
 210                 mUsernameInput.setText(userName);
 211                 oAuthRequired = (mAccountMgr.getUserData(mAccount, AccountAuthenticator.KEY_SUPPORTS_OAUTH2) != null);
 212             }
 213             mOAuth2Check.setChecked(oAuthRequired);
 214             changeViewByOAuth2Check(oAuthRequired);
 215             mJustCreated = true;
 216
 217             if (mAction == ACTION_UPDATE_TOKEN) {
 218                 checkOcServer();
 219             }
 220
 221         } else {
 222             /// connection state and info
 223             mServerIsValid = savedInstanceState.getBoolean(KEY_SERVER_VALID);
 224             mServerIsChecked = savedInstanceState.getBoolean(KEY_SERVER_CHECKED);
 225             mServerStatusText = savedInstanceState.getInt(KEY_SERVER_STATUS_TEXT);
 226             mServerStatusIcon = savedInstanceState.getInt(KEY_SERVER_STATUS_ICON);
 227             mIsSslConn = savedInstanceState.getBoolean(KEY_IS_SSL_CONN);
 228             mAuthStatusText = savedInstanceState.getInt(KEY_AUTH_STATUS_TEXT);
 229             mAuthStatusIcon = savedInstanceState.getInt(KEY_AUTH_STATUS_ICON);
 230             if (savedInstanceState.getBoolean(KEY_PASSWORD_VISIBLE, false)) {
 231                 showPassword();
 232             }
 233
 234             /// server data
 235             String ocVersion = savedInstanceState.getString(KEY_OC_VERSION);
 236             if (ocVersion != null) {
 237                 mDiscoveredVersion = new OwnCloudVersion(ocVersion);
 238             }
 239             mHostBaseUrl = savedInstanceState.getString(KEY_HOST_URL_TEXT);
 240
 241             // account data, if updating
 242             mAccount = savedInstanceState.getParcelable(KEY_ACCOUNT);
 243
 244             // check if server check was interrupted by a configuration change
 245             if (savedInstanceState.getBoolean(KEY_SERVER_CHECK_IN_PROGRESS, false)) {
 246                 checkOcServer();
 247             }
 248
 249             // refresh button enabled
 250             refreshButtonEnabled = savedInstanceState.getBoolean(KEY_REFRESH_BUTTON_ENABLED);
 251
 252
 253         }
 254
 255         showServerStatus();
 256         showAuthStatus();
 257
 258         if (mAction == ACTION_UPDATE_TOKEN) {
 259             /// lock things that should not change
 260             mHostUrlInput.setEnabled(false);
 261             mHostUrlInput.setFocusable(false);
 262             mUsernameInput.setEnabled(false);
 263             mUsernameInput.setFocusable(false);
 264             mOAuth2Check.setVisibility(View.GONE);
 265         }
 266
 267         //if (mServerIsChecked && !mServerIsValid && mRefreshButtonEnabled) showRefreshButton();
 268         if (mServerIsChecked && !mServerIsValid && refreshButtonEnabled) showRefreshButton();
 269         mOkButton.setEnabled(mServerIsValid); // state not automatically recovered in configuration changes
 270
 271         if (!OAUTH_MODE_OPTIONAL.equals(getString(R.string.oauth2_mode))) {
 272             mOAuth2Check.setVisibility(View.GONE);
 273         }
 274
 275         mPasswordInput.setText("");     // clean password to avoid social hacking (disadvantage: password in removed if the device is turned aside)
 276
 277         /// bind view elements to listeners
 278         mHostUrlInput.setOnFocusChangeListener(this);
 279         mHostUrlInput.addTextChangedListener(new TextWatcher() {
 280
 281             @Override
 282             public void afterTextChanged(Editable s) {
 283                 if (!mHostBaseUrl.equals(normalizeUrl(mHostUrlInput.getText().toString()))) {
 284                     mOkButton.setEnabled(false);
 285                 }
 286             }
 287
 288             @Override
 289             public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
 290
 291             @Override
 292             public void onTextChanged(CharSequence s, int start, int before, int count) {}
 293
 294         });
 295         mPasswordInput.setOnFocusChangeListener(this);
 296         mPasswordInput.setImeOptions(EditorInfo.IME_ACTION_DONE);
 297         mPasswordInput.setOnEditorActionListener(this);
 298         mPasswordInput.setOnTouchListener(new RightDrawableOnTouchListener() {
 299             @Override
 300             public boolean onDrawableTouch(final MotionEvent event) {
 301                 if (event.getAction() == MotionEvent.ACTION_UP) {
 302                     AuthenticatorActivity.this.onViewPasswordClick();
 303                 }
 304                 return true;
 305             }
 306         });
 307     }
 308
 309     /**
 310      * Saves relevant state before {@link #onPause()}
 311      *
 312      * Do NOT save {@link #mNewCapturedUriFromOAuth2Redirection}; it keeps a temporal flag, intended to defer the
 313      * processing of the redirection caught in {@link #onNewIntent(Intent)} until {@link #onResume()}
 314      *
 315      * See {@link #loadSavedInstanceState(Bundle)}
 316      */
 317     @Override
 318     protected void onSaveInstanceState(Bundle outState) {
 319         super.onSaveInstanceState(outState);
 320
 321         /// connection state and info
 322         outState.putInt(KEY_SERVER_STATUS_TEXT, mServerStatusText);
 323         outState.putInt(KEY_SERVER_STATUS_ICON, mServerStatusIcon);
 324         outState.putBoolean(KEY_SERVER_VALID, mServerIsValid);
 325         outState.putBoolean(KEY_SERVER_CHECKED, mServerIsChecked);
 326         outState.putBoolean(KEY_SERVER_CHECK_IN_PROGRESS, (!mServerIsValid && mOcServerChkOperation != null));
 327         outState.putBoolean(KEY_IS_SSL_CONN, mIsSslConn);
 328         outState.putBoolean(KEY_PASSWORD_VISIBLE, isPasswordVisible());
 329         outState.putInt(KEY_AUTH_STATUS_ICON, mAuthStatusIcon);
 330         outState.putInt(KEY_AUTH_STATUS_TEXT, mAuthStatusText);
 331
 332         /// server data
 333         if (mDiscoveredVersion != null) {
 334             outState.putString(KEY_OC_VERSION, mDiscoveredVersion.toString());
 335         }
 336         outState.putString(KEY_HOST_URL_TEXT, mHostBaseUrl);
 337
 338         /// account data, if updating
 339         if (mAccount != null) {
 340             outState.putParcelable(KEY_ACCOUNT, mAccount);
 341         }
 342
 343         // refresh button enabled
 344         //outState.putBoolean(KEY_REFRESH_BUTTON_ENABLED, mRefreshButtonEnabled);
 345         outState.putBoolean(KEY_REFRESH_BUTTON_ENABLED, (mRefreshButton.getVisibility() == View.VISIBLE));
 346
 347     }
 348
 349
 350     /**
 351      * The redirection triggered by the OAuth authentication server as response to the GET AUTHORIZATION request
 352      * is caught here.
 353      *
 354      * To make this possible, this activity needs to be qualified with android:launchMode = "singleTask" in the
 355      * AndroidManifest.xml file.
 356      */
 357     @Override
 358     protected void onNewIntent (Intent intent) {
 359         Log_OC.d(TAG, "onNewIntent()");
 360         Uri data = intent.getData();
 361         if (data != null && data.toString().startsWith(getString(R.string.oauth2_redirect_uri))) {
 362             mNewCapturedUriFromOAuth2Redirection = data;
 363         }
 364     }
 365
 366
 367     /**
 368      * The redirection triggered by the OAuth authentication server as response to the GET AUTHORIZATION, and
 369      * deferred in {@link #onNewIntent(Intent)}, is processed here.
 370      */
 371     @Override
 372     protected void onResume() {
 373         super.onResume();
 374         // the state of mOAuth2Check is automatically recovered between configuration changes, but not before onCreate() finishes; so keep the next lines here
 375         changeViewByOAuth2Check(mOAuth2Check.isChecked());
 376         if (mAction == ACTION_UPDATE_TOKEN && mJustCreated && getIntent().getBooleanExtra(EXTRA_ENFORCED_UPDATE, false)) {
 377             if (mOAuth2Check.isChecked())
 378                 Toast.makeText(this, R.string.auth_expired_oauth_token_toast, Toast.LENGTH_LONG).show();
 379             else
 380                 Toast.makeText(this, R.string.auth_expired_basic_auth_toast, Toast.LENGTH_LONG).show();
 381         }
 382
 383         if (mNewCapturedUriFromOAuth2Redirection != null) {
 384             getOAuth2AccessTokenFromCapturedRedirection();
 385         }
 386
 387         mJustCreated = false;
 388     }
 389
 390
 391     /**
 392      * Parses the redirection with the response to the GET AUTHORIZATION request to the
 393      * oAuth server and requests for the access token (GET ACCESS TOKEN)
 394      */
 395     private void getOAuth2AccessTokenFromCapturedRedirection() {
 396         /// Parse data from OAuth redirection
 397         String queryParameters = mNewCapturedUriFromOAuth2Redirection.getQuery();
 398         mNewCapturedUriFromOAuth2Redirection = null;
 399
 400         /// Showing the dialog with instructions for the user.
 401         showDialog(DIALOG_OAUTH2_LOGIN_PROGRESS);
 402
 403         /// GET ACCESS TOKEN to the oAuth server
 404         RemoteOperation operation = new OAuth2GetAccessToken(   getString(R.string.oauth2_client_id),
 405                 getString(R.string.oauth2_redirect_uri),
 406                 getString(R.string.oauth2_grant_type),
 407                 queryParameters);
 408         //WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(getString(R.string.oauth2_url_endpoint_access)), getApplicationContext());
 409         WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mOAuthTokenEndpointText.getText().toString().trim()), getApplicationContext());
 410         operation.execute(client, this, mHandler);
 411     }
 412
 413
 414
 415     /**
 416      * Handles the change of focus on the text inputs for the server URL and the password
 417      */
 418     public void onFocusChange(View view, boolean hasFocus) {
 419         if (view.getId() == R.id.hostUrlInput) {
 420             if (!hasFocus) {
 421                 onUrlInputFocusLost((TextView) view);
 422                 if (!mServerIsValid) {
 423                     showRefreshButton();
 424                 }
 425             }
 426             else {
 427                 hideRefreshButton();
 428             }
 429
 430         } else if (view.getId() == R.id.account_password) {
 431             onPasswordFocusChanged((TextView) view, hasFocus);
 432         }
 433     }
 434
 435
 436     /**
 437      * Handles changes in focus on the text input for the server URL.
 438      *
 439      * IMPORTANT ENTRY POINT 2: When (!hasFocus), user wrote the server URL and changed to
 440      * other field. The operation to check the existence of the server in the entered URL is
 441      * started.
 442      *
 443      * When hasFocus:    user 'comes back' to write again the server URL.
 444      *
 445      * @param hostInput     TextView with the URL input field receiving the change of focus.
 446      */
 447     private void onUrlInputFocusLost(TextView hostInput) {
 448         if (!mHostBaseUrl.equals(normalizeUrl(mHostUrlInput.getText().toString()))) {
 449             checkOcServer();
 450         } else {
 451             mOkButton.setEnabled(mServerIsValid);
 452         }
 453     }
 454
 455
 456     private void checkOcServer() {
 457         String uri = trimUrlWebdav(mHostUrlInput.getText().toString().trim());
 458         mServerIsValid = false;
 459         mServerIsChecked = false;
 460         mOkButton.setEnabled(false);
 461         mDiscoveredVersion = null;
 462         hideRefreshButton();
 463         if (uri.length() != 0) {
 464             mServerStatusText = R.string.auth_testing_connection;
 465             mServerStatusIcon = R.drawable.progress_small;
 466             showServerStatus();
 467             mOcServerChkOperation = new  OwnCloudServerCheckOperation(uri, this);
 468             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(uri), this);
 469             mOperationThread = mOcServerChkOperation.execute(client, this, mHandler);
 470         } else {
 471             mServerStatusText = 0;
 472             mServerStatusIcon = 0;
 473             showServerStatus();
 474         }
 475     }
 476
 477
 478     /**
 479      * Handles changes in focus on the text input for the password (basic authorization).
 480      *
 481      * When (hasFocus), the button to toggle password visibility is shown.
 482      *
 483      * When (!hasFocus), the button is made invisible and the password is hidden.
 484      *
 485      * @param passwordInput    TextView with the password input field receiving the change of focus.
 486      * @param hasFocus          'True' if focus is received, 'false' if is lost
 487      */
 488     private void onPasswordFocusChanged(TextView passwordInput, boolean hasFocus) {
 489         if (hasFocus) {
 490             showViewPasswordButton();
 491         } else {
 492             hidePassword();
 493             hidePasswordButton();
 494         }
 495     }
 496
 497
 498     private void showViewPasswordButton() {
 499         //int drawable = android.R.drawable.ic_menu_view;
 500         int drawable = R.drawable.ic_view;
 501         if (isPasswordVisible()) {
 502             //drawable = android.R.drawable.ic_secure;
 503             drawable = R.drawable.ic_hide;
 504         }
 505         mPasswordInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, drawable, 0);
 506     }
 507
 508     private boolean isPasswordVisible() {
 509         return ((mPasswordInput.getInputType() & InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD) == InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
 510     }
 511
 512     private void hidePasswordButton() {
 513         mPasswordInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0);
 514     }
 515
 516     private void showPassword() {
 517         mPasswordInput.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
 518         showViewPasswordButton();
 519     }
 520
 521     private void hidePassword() {
 522         mPasswordInput.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
 523         showViewPasswordButton();
 524     }
 525
 526
 527     /**
 528      * Cancels the authenticator activity
 529      *
 530      * IMPORTANT ENTRY POINT 3: Never underestimate the importance of cancellation
 531      *
 532      * This method is bound in the layout/acceoun_setup.xml resource file.
 533      *
 534      * @param view      Cancel button
 535      */
 536     public void onCancelClick(View view) {
 537         setResult(RESULT_CANCELED);     // TODO review how is this related to AccountAuthenticator (debugging)
 538         finish();
 539     }
 540
 541
 542
 543     /**
 544      * Checks the credentials of the user in the root of the ownCloud server
 545      * before creating a new local account.
 546      *
 547      * For basic authorization, a check of existence of the root folder is
 548      * performed.
 549      *
 550      * For OAuth, starts the flow to get an access token; the credentials test
 551      * is postponed until it is available.
 552      *
 553      * IMPORTANT ENTRY POINT 4
 554      *
 555      * @param view      OK button
 556      */
 557     public void onOkClick(View view) {
 558         // this check should be unnecessary
 559         if (mDiscoveredVersion == null || !mDiscoveredVersion.isVersionValid()  || mHostBaseUrl == null || mHostBaseUrl.length() == 0) {
 560             mServerStatusIcon = R.drawable.common_error;
 561             mServerStatusText = R.string.auth_wtf_reenter_URL;
 562             showServerStatus();
 563             mOkButton.setEnabled(false);
 564             Log_OC.wtf(TAG,  "The user was allowed to click 'connect' to an unchecked server!!");
 565             return;
 566         }
 567
 568         if (mOAuth2Check.isChecked()) {
 569             startOauthorization();
 570
 571         } else {
 572             checkBasicAuthorization();
 573         }
 574     }
 575
 576
 577     /**
 578      * Tests the credentials entered by the user performing a check of existence on
 579      * the root folder of the ownCloud server.
 580      */
 581     private void checkBasicAuthorization() {
 582         /// get the path to the root folder through WebDAV from the version server
 583         String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, false);
 584
 585         /// get basic credentials entered by user
 586         String username = mUsernameInput.getText().toString();
 587         String password = mPasswordInput.getText().toString();
 588
 589         /// be gentle with the user
 590         showDialog(DIALOG_LOGIN_PROGRESS);
 591
 592         /// test credentials accessing the root folder
 593         mAuthCheckOperation = new  ExistenceCheckOperation("", this, false);
 594         WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this);
 595         client.setBasicCredentials(username, password);
 596         mOperationThread = mAuthCheckOperation.execute(client, this, mHandler);
 597     }
 598
 599
 600     /**
 601      * Starts the OAuth 'grant type' flow to get an access token, with
 602      * a GET AUTHORIZATION request to the BUILT-IN authorization server.
 603      */
 604     private void startOauthorization() {
 605         // be gentle with the user
 606         mAuthStatusIcon = R.drawable.progress_small;
 607         mAuthStatusText = R.string.oauth_login_connection;
 608         showAuthStatus();
 609
 610         // GET AUTHORIZATION request
 611         //Uri uri = Uri.parse(getString(R.string.oauth2_url_endpoint_auth));
 612         Uri uri = Uri.parse(mOAuthAuthEndpointText.getText().toString().trim());
 613         Uri.Builder uriBuilder = uri.buildUpon();
 614         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_RESPONSE_TYPE, getString(R.string.oauth2_response_type));
 615         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_REDIRECT_URI, getString(R.string.oauth2_redirect_uri));
 616         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_CLIENT_ID, getString(R.string.oauth2_client_id));
 617         uriBuilder.appendQueryParameter(OAuth2Constants.KEY_SCOPE, getString(R.string.oauth2_scope));
 618         //uriBuilder.appendQueryParameter(OAuth2Constants.KEY_STATE, whateverwewant);
 619         uri = uriBuilder.build();
 620         Log_OC.d(TAG, "Starting browser to view " + uri.toString());
 621         Intent i = new Intent(Intent.ACTION_VIEW, uri);
 622         startActivity(i);
 623     }
 624
 625
 626     /**
 627      * Callback method invoked when a RemoteOperation executed by this Activity finishes.
 628      *
 629      * Dispatches the operation flow to the right method.
 630      */
 631     @Override
 632     public void onRemoteOperationFinish(RemoteOperation operation, RemoteOperationResult result) {
 633
 634         if (operation instanceof OwnCloudServerCheckOperation) {
 635             onOcServerCheckFinish((OwnCloudServerCheckOperation) operation, result);
 636
 637         } else if (operation instanceof OAuth2GetAccessToken) {
 638             onGetOAuthAccessTokenFinish((OAuth2GetAccessToken)operation, result);
 639
 640         } else if (operation instanceof ExistenceCheckOperation)  {
 641             onAuthorizationCheckFinish((ExistenceCheckOperation)operation, result);
 642
 643         }
 644     }
 645
 646
 647     /**
 648      * Processes the result of the server check performed when the user finishes the enter of the
 649      * server URL.
 650      *
 651      * @param operation     Server check performed.
 652      * @param result        Result of the check.
 653      */
 654     private void onOcServerCheckFinish(OwnCloudServerCheckOperation operation, RemoteOperationResult result) {
 655         if (operation.equals(mOcServerChkOperation)) {
 656             /// save result state
 657             mServerIsChecked = true;
 658             mServerIsValid = result.isSuccess();
 659             mIsSslConn = (result.getCode() == ResultCode.OK_SSL);
 660             mOcServerChkOperation = null;
 661
 662             /// update status icon and text
 663             if (mServerIsValid) {
 664                 hideRefreshButton();
 665             } else {
 666                 showRefreshButton();
 667             }
 668             updateServerStatusIconAndText(result);
 669             showServerStatus();
 670
 671             /// very special case (TODO: move to a common place for all the remote operations)
 672             if (result.getCode() == ResultCode.SSL_RECOVERABLE_PEER_UNVERIFIED) {
 673                 mLastSslUntrustedServerResult = result;
 674                 showDialog(DIALOG_SSL_VALIDATOR);
 675             }
 676
 677             /// retrieve discovered version and normalize server URL
 678             mDiscoveredVersion = operation.getDiscoveredVersion();
 679             mHostBaseUrl = normalizeUrl(mHostUrlInput.getText().toString());
 680
 681             /// allow or not the user try to access the server
 682             mOkButton.setEnabled(mServerIsValid);
 683
 684         }   // else nothing ; only the last check operation is considered;
 685         // multiple can be triggered if the user amends a URL before a previous check can be triggered
 686     }
 687
 688
 689     private String normalizeUrl(String url) {
 690         if (url != null && url.length() > 0) {
 691             url = url.trim();
 692             if (!url.toLowerCase().startsWith("http://") &&
 693                     !url.toLowerCase().startsWith("https://")) {
 694                 if (mIsSslConn) {
 695                     url = "https://" + url;
 696                 } else {
 697                     url = "http://" + url;
 698                 }
 699             }
 700
 701             // OC-208: Add suffix remote.php/webdav to normalize (OC-34)
 702             url = trimUrlWebdav(url);
 703
 704             if (url.endsWith("/")) {
 705                 url = url.substring(0, url.length() - 1);
 706             }
 707
 708         }
 709         Log_OC.d(TAG, "URL Normalize " + url);
 710         return (url != null ? url : "");
 711     }
 712
 713
 714     private String trimUrlWebdav(String url){
 715         if(url.toLowerCase().endsWith(AccountUtils.WEBDAV_PATH_4_0)){
 716             url = url.substring(0, url.length() - AccountUtils.WEBDAV_PATH_4_0.length());
 717         } else if(url.toLowerCase().endsWith(AccountUtils.WEBDAV_PATH_2_0)){
 718             url = url.substring(0, url.length() - AccountUtils.WEBDAV_PATH_2_0.length());
 719         } else if (url.toLowerCase().endsWith(AccountUtils.WEBDAV_PATH_1_2)){
 720             url = url.substring(0, url.length() - AccountUtils.WEBDAV_PATH_1_2.length());
 721         }
 722         return (url != null ? url : "");
 723     }
 724
 725
 726     /**
 727      * Chooses the right icon and text to show to the user for the received operation result.
 728      *
 729      * @param result    Result of a remote operation performed in this activity
 730      */
 731     private void updateServerStatusIconAndText(RemoteOperationResult result) {
 732         mServerStatusIcon = R.drawable.common_error;    // the most common case in the switch below
 733
 734         switch (result.getCode()) {
 735         case OK_SSL:
 736             mServerStatusIcon = android.R.drawable.ic_secure;
 737             mServerStatusText = R.string.auth_secure_connection;
 738             break;
 739
 740         case OK_NO_SSL:
 741         case OK:
 742             if (mHostUrlInput.getText().toString().trim().toLowerCase().startsWith("http://") ) {
 743                 mServerStatusText = R.string.auth_connection_established;
 744                 mServerStatusIcon = R.drawable.ic_ok;
 745             } else {
 746                 mServerStatusText = R.string.auth_nossl_plain_ok_title;
 747                 mServerStatusIcon = android.R.drawable.ic_partial_secure;
 748             }
 749             break;
 750
 751         case NO_NETWORK_CONNECTION:
 752             mServerStatusIcon = R.drawable.no_network;
 753             mServerStatusText = R.string.auth_no_net_conn_title;
 754             break;
 755
 756         case SSL_RECOVERABLE_PEER_UNVERIFIED:
 757             mServerStatusText = R.string.auth_ssl_unverified_server_title;
 758             break;
 759         case BAD_OC_VERSION:
 760             mServerStatusText = R.string.auth_bad_oc_version_title;
 761             break;
 762         case WRONG_CONNECTION:
 763             mServerStatusText = R.string.auth_wrong_connection_title;
 764             break;
 765         case TIMEOUT:
 766             mServerStatusText = R.string.auth_timeout_title;
 767             break;
 768         case INCORRECT_ADDRESS:
 769             mServerStatusText = R.string.auth_incorrect_address_title;
 770             break;
 771         case SSL_ERROR:
 772             mServerStatusText = R.string.auth_ssl_general_error_title;
 773             break;
 774         case UNAUTHORIZED:
 775             mServerStatusText = R.string.auth_unauthorized;
 776             break;
 777         case HOST_NOT_AVAILABLE:
 778             mServerStatusText = R.string.auth_unknown_host_title;
 779             break;
 780         case INSTANCE_NOT_CONFIGURED:
 781             mServerStatusText = R.string.auth_not_configured_title;
 782             break;
 783         case FILE_NOT_FOUND:
 784             mServerStatusText = R.string.auth_incorrect_path_title;
 785             break;
 786         case OAUTH2_ERROR:
 787             mServerStatusText = R.string.auth_oauth_error;
 788             break;
 789         case OAUTH2_ERROR_ACCESS_DENIED:
 790             mServerStatusText = R.string.auth_oauth_error_access_denied;
 791             break;
 792         case UNHANDLED_HTTP_CODE:
 793         case UNKNOWN_ERROR:
 794             mServerStatusText = R.string.auth_unknown_error_title;
 795             break;
 796         default:
 797             mServerStatusText = 0;
 798             mServerStatusIcon = 0;
 799         }
 800     }
 801
 802
 803     /**
 804      * Chooses the right icon and text to show to the user for the received operation result.
 805      *
 806      * @param result    Result of a remote operation performed in this activity
 807      */
 808     private void updateAuthStatusIconAndText(RemoteOperationResult result) {
 809         mAuthStatusIcon = R.drawable.common_error;    // the most common case in the switch below
 810
 811         switch (result.getCode()) {
 812         case OK_SSL:
 813             mAuthStatusIcon = android.R.drawable.ic_secure;
 814             mAuthStatusText = R.string.auth_secure_connection;
 815             break;
 816
 817         case OK_NO_SSL:
 818         case OK:
 819             if (mHostUrlInput.getText().toString().trim().toLowerCase().startsWith("http://") ) {
 820                 mAuthStatusText = R.string.auth_connection_established;
 821                 mAuthStatusIcon = R.drawable.ic_ok;
 822             } else {
 823                 mAuthStatusText = R.string.auth_nossl_plain_ok_title;
 824                 mAuthStatusIcon = android.R.drawable.ic_partial_secure;
 825             }
 826             break;
 827
 828         case NO_NETWORK_CONNECTION:
 829             mAuthStatusIcon = R.drawable.no_network;
 830             mAuthStatusText = R.string.auth_no_net_conn_title;
 831             break;
 832
 833         case SSL_RECOVERABLE_PEER_UNVERIFIED:
 834             mAuthStatusText = R.string.auth_ssl_unverified_server_title;
 835             break;
 836         case BAD_OC_VERSION:
 837             mAuthStatusText = R.string.auth_bad_oc_version_title;
 838             break;
 839         case WRONG_CONNECTION:
 840             mAuthStatusText = R.string.auth_wrong_connection_title;
 841             break;
 842         case TIMEOUT:
 843             mAuthStatusText = R.string.auth_timeout_title;
 844             break;
 845         case INCORRECT_ADDRESS:
 846             mAuthStatusText = R.string.auth_incorrect_address_title;
 847             break;
 848         case SSL_ERROR:
 849             mAuthStatusText = R.string.auth_ssl_general_error_title;
 850             break;
 851         case UNAUTHORIZED:
 852             mAuthStatusText = R.string.auth_unauthorized;
 853             break;
 854         case HOST_NOT_AVAILABLE:
 855             mAuthStatusText = R.string.auth_unknown_host_title;
 856             break;
 857         case INSTANCE_NOT_CONFIGURED:
 858             mAuthStatusText = R.string.auth_not_configured_title;
 859             break;
 860         case FILE_NOT_FOUND:
 861             mAuthStatusText = R.string.auth_incorrect_path_title;
 862             break;
 863         case OAUTH2_ERROR:
 864             mAuthStatusText = R.string.auth_oauth_error;
 865             break;
 866         case OAUTH2_ERROR_ACCESS_DENIED:
 867             mAuthStatusText = R.string.auth_oauth_error_access_denied;
 868             break;
 869         case UNHANDLED_HTTP_CODE:
 870         case UNKNOWN_ERROR:
 871             mAuthStatusText = R.string.auth_unknown_error_title;
 872             break;
 873         default:
 874             mAuthStatusText = 0;
 875             mAuthStatusIcon = 0;
 876         }
 877     }
 878
 879
 880     /**
 881      * Processes the result of the request for and access token send
 882      * to an OAuth authorization server.
 883      *
 884      * @param operation     Operation performed requesting the access token.
 885      * @param result        Result of the operation.
 886      */
 887     private void onGetOAuthAccessTokenFinish(OAuth2GetAccessToken operation, RemoteOperationResult result) {
 888         try {
 889             dismissDialog(DIALOG_OAUTH2_LOGIN_PROGRESS);
 890         } catch (IllegalArgumentException e) {
 891             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 892         }
 893
 894         String webdav_path = AccountUtils.getWebdavPath(mDiscoveredVersion, true);
 895         if (result.isSuccess() && webdav_path != null) {
 896             /// be gentle with the user
 897             showDialog(DIALOG_LOGIN_PROGRESS);
 898
 899             /// time to test the retrieved access token on the ownCloud server
 900             mOAuthAccessToken = ((OAuth2GetAccessToken)operation).getResultTokenMap().get(OAuth2Constants.KEY_ACCESS_TOKEN);
 901             Log_OC.d(TAG, "Got ACCESS TOKEN: " + mOAuthAccessToken);
 902             mAuthCheckOperation = new ExistenceCheckOperation("", this, false);
 903             WebdavClient client = OwnCloudClientUtils.createOwnCloudClient(Uri.parse(mHostBaseUrl + webdav_path), this);
 904             client.setBearerCredentials(mOAuthAccessToken);
 905             mAuthCheckOperation.execute(client, this, mHandler);
 906
 907         } else {
 908             updateAuthStatusIconAndText(result);
 909             showAuthStatus();
 910             Log_OC.d(TAG, "Access failed: " + result.getLogMessage());
 911         }
 912     }
 913
 914
 915     /**
 916      * Processes the result of the access check performed to try the user credentials.
 917      *
 918      * Creates a new account through the AccountManager.
 919      *
 920      * @param operation     Access check performed.
 921      * @param result        Result of the operation.
 922      */
 923     private void onAuthorizationCheckFinish(ExistenceCheckOperation operation, RemoteOperationResult result) {
 924         try {
 925             dismissDialog(DIALOG_LOGIN_PROGRESS);
 926         } catch (IllegalArgumentException e) {
 927             // NOTHING TO DO ; can't find out what situation that leads to the exception in this code, but user logs signal that it happens
 928         }
 929
 930         if (result.isSuccess()) {
 931             Log_OC.d(TAG, "Successful access - time to save the account");
 932
 933             if (mAction == ACTION_CREATE) {
 934                 createAccount();
 935
 936             } else {
 937                 updateToken();
 938             }
 939
 940             finish();
 941
 942         } else if (result.isServerFail() || result.isException()) {
 943             /// if server fail or exception in authorization, the UI is updated as when a server check failed
 944             mServerIsChecked = true;
 945             mServerIsValid = false;
 946             mIsSslConn = false;
 947             mOcServerChkOperation = null;
 948             mDiscoveredVersion = null;
 949             mHostBaseUrl = normalizeUrl(mHostUrlInput.getText().toString());
 950
 951             // update status icon and text
 952             updateServerStatusIconAndText(result);
 953             showServerStatus();
 954             mAuthStatusIcon = 0;
 955             mAuthStatusText = 0;
 956             showAuthStatus();
 957
 958             // update input controls state
 959             showRefreshButton();
 960             mOkButton.setEnabled(false);
 961
 962             // very special case (TODO: move to a common place for all the remote operations) (dangerous here?)
 963             if (result.getCode() == ResultCode.SSL_RECOVERABLE_PEER_UNVERIFIED) {
 964                 mLastSslUntrustedServerResult = result;
 965                 showDialog(DIALOG_SSL_VALIDATOR);
 966             }
 967
 968         } else {    // authorization fail due to client side - probably wrong credentials
 969             updateAuthStatusIconAndText(result);
 970             showAuthStatus();
 971             Log_OC.d(TAG, "Access failed: " + result.getLogMessage());
 972         }
 973     }
 974
 975
 976     /**
 977      * Sets the proper response to get that the Account Authenticator that started this activity saves
 978      * a new authorization token for mAccount.
 979      */
 980     private void updateToken() {
 981         Bundle response = new Bundle();
 982         response.putString(AccountManager.KEY_ACCOUNT_NAME, mAccount.name);
 983         response.putString(AccountManager.KEY_ACCOUNT_TYPE, mAccount.type);
 984         boolean isOAuth = mOAuth2Check.isChecked();
 985         if (isOAuth) {
 986             response.putString(AccountManager.KEY_AUTHTOKEN, mOAuthAccessToken);
 987             // the next line is necessary; by now, notifications are calling directly to the AuthenticatorActivity to update, without AccountManager intervention
 988             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
 989         } else {
 990             response.putString(AccountManager.KEY_AUTHTOKEN, mPasswordInput.getText().toString());
 991             mAccountMgr.setPassword(mAccount, mPasswordInput.getText().toString());
 992         }
 993         setAccountAuthenticatorResult(response);
 994     }
 995
 996
 997     /**
 998      * Creates a new account through the Account Authenticator that started this activity.
 999      *
1000      * This makes the account permanent.
1001      *
1002      * TODO Decide how to name the OAuth accounts
1003      */
1004     private void createAccount() {
1005         /// create and save new ownCloud account
1006         boolean isOAuth = mOAuth2Check.isChecked();
1007
1008         Uri uri = Uri.parse(mHostBaseUrl);
1009         String username = mUsernameInput.getText().toString().trim();
1010         if (isOAuth) {
1011             username = "OAuth_user" + (new java.util.Random(System.currentTimeMillis())).nextLong();
1012         }
1013         String accountName = username + "@" + uri.getHost();
1014         if (uri.getPort() >= 0) {
1015             accountName += ":" + uri.getPort();
1016         }
1017         mAccount = new Account(accountName, AccountAuthenticator.ACCOUNT_TYPE);
1018         if (isOAuth) {
1019             mAccountMgr.addAccountExplicitly(mAccount, "", null);  // with our implementation, the password is never input in the app
1020         } else {
1021             mAccountMgr.addAccountExplicitly(mAccount, mPasswordInput.getText().toString(), null);
1022         }
1023
1024         /// add the new account as default in preferences, if there is none already
1025         Account defaultAccount = AccountUtils.getCurrentOwnCloudAccount(this);
1026         if (defaultAccount == null) {
1027             SharedPreferences.Editor editor = PreferenceManager
1028                     .getDefaultSharedPreferences(this).edit();
1029             editor.putString("select_oc_account", accountName);
1030             editor.commit();
1031         }
1032
1033         /// prepare result to return to the Authenticator
1034         //  TODO check again what the Authenticator makes with it; probably has the same effect as addAccountExplicitly, but it's not well done
1035         final Intent intent = new Intent();
1036         intent.putExtra(AccountManager.KEY_ACCOUNT_TYPE,    AccountAuthenticator.ACCOUNT_TYPE);
1037         intent.putExtra(AccountManager.KEY_ACCOUNT_NAME,    mAccount.name);
1038         if (!isOAuth)
1039             intent.putExtra(AccountManager.KEY_AUTHTOKEN,   AccountAuthenticator.ACCOUNT_TYPE); // TODO check this; not sure it's right; maybe
1040         intent.putExtra(AccountManager.KEY_USERDATA,        username);
1041         if (isOAuth) {
1042             mAccountMgr.setAuthToken(mAccount, AccountAuthenticator.AUTH_TOKEN_TYPE_ACCESS_TOKEN, mOAuthAccessToken);
1043         }
1044         /// add user data to the new account; TODO probably can be done in the last parameter addAccountExplicitly, or in KEY_USERDATA
1045         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_VERSION,    mDiscoveredVersion.toString());
1046         mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_OC_BASE_URL,   mHostBaseUrl);
1047         if (isOAuth)
1048             mAccountMgr.setUserData(mAccount, AccountAuthenticator.KEY_SUPPORTS_OAUTH2, "TRUE");  // TODO this flag should be unnecessary
1049
1050         setAccountAuthenticatorResult(intent.getExtras());
1051         setResult(RESULT_OK, intent);
1052
1053         /// immediately request for the synchronization of the new account
1054         Bundle bundle = new Bundle();
1055         bundle.putBoolean(ContentResolver.SYNC_EXTRAS_MANUAL, true);
1056         ContentResolver.requestSync(mAccount, AccountAuthenticator.AUTHORITY, bundle);
1057     }
1058
1059
1060     /**
1061      * {@inheritDoc}
1062      *
1063      * Necessary to update the contents of the SSL Dialog
1064      *
1065      * TODO move to some common place for all possible untrusted SSL failures
1066      */
1067     @Override
1068     protected void onPrepareDialog(int id, Dialog dialog, Bundle args) {
1069         switch (id) {
1070         case DIALOG_LOGIN_PROGRESS:
1071         case DIALOG_CERT_NOT_SAVED:
1072         case DIALOG_OAUTH2_LOGIN_PROGRESS:
1073             break;
1074         case DIALOG_SSL_VALIDATOR: {
1075             ((SslValidatorDialog)dialog).updateResult(mLastSslUntrustedServerResult);
1076             break;
1077         }
1078         default:
1079             Log_OC.e(TAG, "Incorrect dialog called with id = " + id);
1080         }
1081     }
1082
1083
1084     /**
1085      * {@inheritDoc}
1086      */
1087     @Override
1088     protected Dialog onCreateDialog(int id) {
1089         Dialog dialog = null;
1090         switch (id) {
1091         case DIALOG_LOGIN_PROGRESS: {
1092             /// simple progress dialog
1093             ProgressDialog working_dialog = new ProgressDialog(this);
1094             working_dialog.setMessage(getResources().getString(R.string.auth_trying_to_login));
1095             working_dialog.setIndeterminate(true);
1096             working_dialog.setCancelable(true);
1097             working_dialog
1098             .setOnCancelListener(new DialogInterface.OnCancelListener() {
1099                 @Override
1100                 public void onCancel(DialogInterface dialog) {
1101                     /// TODO study if this is enough
1102                     Log_OC.i(TAG, "Login canceled");
1103                     if (mOperationThread != null) {
1104                         mOperationThread.interrupt();
1105                         finish();
1106                     }
1107                 }
1108             });
1109             dialog = working_dialog;
1110             break;
1111         }
1112         case DIALOG_OAUTH2_LOGIN_PROGRESS: {
1113             ProgressDialog working_dialog = new ProgressDialog(this);
1114             working_dialog.setMessage(String.format("Getting authorization"));
1115             working_dialog.setIndeterminate(true);
1116             working_dialog.setCancelable(true);
1117             working_dialog
1118             .setOnCancelListener(new DialogInterface.OnCancelListener() {
1119                 @Override
1120                 public void onCancel(DialogInterface dialog) {
1121                     Log_OC.i(TAG, "Login canceled");
1122                     finish();
1123                 }
1124             });
1125             dialog = working_dialog;
1126             break;
1127         }
1128         case DIALOG_SSL_VALIDATOR: {
1129             /// TODO start to use new dialog interface, at least for this (it is a FragmentDialog already)
1130             dialog = SslValidatorDialog.newInstance(this, mLastSslUntrustedServerResult, this);
1131             break;
1132         }
1133         case DIALOG_CERT_NOT_SAVED: {
1134             AlertDialog.Builder builder = new AlertDialog.Builder(this);
1135             builder.setMessage(getResources().getString(R.string.ssl_validator_not_saved));
1136             builder.setCancelable(false);
1137             builder.setPositiveButton(R.string.common_ok, new DialogInterface.OnClickListener() {
1138                 @Override
1139                 public void onClick(DialogInterface dialog, int which) {
1140                     dialog.dismiss();
1141                 };
1142             });
1143             dialog = builder.create();
1144             break;
1145         }
1146         default:
1147             Log_OC.e(TAG, "Incorrect dialog called with id = " + id);
1148         }
1149         return dialog;
1150     }
1151
1152
1153     /**
1154      * Starts and activity to open the 'new account' page in the ownCloud web site
1155      *
1156      * @param view      'Account register' button
1157      */
1158     public void onRegisterClick(View view) {
1159         Intent register = new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.url_account_register)));
1160         setResult(RESULT_CANCELED);
1161         startActivity(register);
1162     }
1163
1164
1165     /**
1166      * Updates the content and visibility state of the icon and text associated
1167      * to the last check on the ownCloud server.
1168      */
1169     private void showServerStatus() {
1170         TextView tv = (TextView) findViewById(R.id.server_status_text);
1171
1172         if (mServerStatusIcon == 0 && mServerStatusText == 0) {
1173             tv.setVisibility(View.INVISIBLE);
1174
1175         } else {
1176             tv.setText(mServerStatusText);
1177             tv.setCompoundDrawablesWithIntrinsicBounds(mServerStatusIcon, 0, 0, 0);
1178             tv.setVisibility(View.VISIBLE);
1179         }
1180
1181     }
1182
1183
1184     /**
1185      * Updates the content and visibility state of the icon and text associated
1186      * to the interactions with the OAuth authorization server.
1187      */
1188     private void showAuthStatus() {
1189         if (mAuthStatusIcon == 0 && mAuthStatusText == 0) {
1190             mAuthStatusLayout.setVisibility(View.INVISIBLE);
1191
1192         } else {
1193             mAuthStatusLayout.setText(mAuthStatusText);
1194             mAuthStatusLayout.setCompoundDrawablesWithIntrinsicBounds(mAuthStatusIcon, 0, 0, 0);
1195             mAuthStatusLayout.setVisibility(View.VISIBLE);
1196         }
1197     }
1198
1199
1200     private void showRefreshButton() {
1201         /*mHostUrlInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, R.drawable.ic_action_refresh_black, 0);
1202         mRefreshButtonEnabled = true;*/
1203         mRefreshButton.setVisibility(View.VISIBLE);
1204     }
1205
1206     private void hideRefreshButton() {
1207         /*mHostUrlInput.setCompoundDrawablesWithIntrinsicBounds(0, 0, 0, 0);
1208         mRefreshButtonEnabled = false;*/
1209         mRefreshButton.setVisibility(View.GONE);
1210     }
1211
1212     /**
1213      * Called when the refresh button in the input field for ownCloud host is clicked.
1214      *
1215      * Performs a new check on the URL in the input field.
1216      *
1217      * @param view      Refresh 'button'
1218      */
1219     public void onRefreshClick(View view) {
1220         checkOcServer();
1221     }
1222
1223
1224     /**
1225      * Called when the eye icon in the password field is clicked.
1226      *
1227      * Toggles the visibility of the password in the field.
1228      */
1229     public void onViewPasswordClick() {
1230         int selectionStart = mPasswordInput.getSelectionStart();
1231         int selectionEnd = mPasswordInput.getSelectionEnd();
1232         if (isPasswordVisible()) {
1233             hidePassword();
1234         } else {
1235             showPassword();
1236         }
1237         mPasswordInput.setSelection(selectionStart, selectionEnd);
1238     }
1239
1240
1241     /**
1242      * Called when the checkbox for OAuth authorization is clicked.
1243      *
1244      * Hides or shows the input fields for user & password.
1245      *
1246      * @param view      'View password' 'button'
1247      */
1248     public void onCheckClick(View view) {
1249         CheckBox oAuth2Check = (CheckBox)view;
1250         changeViewByOAuth2Check(oAuth2Check.isChecked());
1251
1252     }
1253
1254     /**
1255      * Changes the visibility of input elements depending upon the kind of authorization
1256      * chosen by the user: basic or OAuth
1257      *
1258      * @param checked       'True' when OAuth is selected.
1259      */
1260     public void changeViewByOAuth2Check(Boolean checked) {
1261
1262         if (checked) {
1263             mOAuthAuthEndpointText.setVisibility(View.VISIBLE);
1264             mOAuthTokenEndpointText.setVisibility(View.VISIBLE);
1265             mUsernameInput.setVisibility(View.GONE);
1266             mPasswordInput.setVisibility(View.GONE);
1267         } else {
1268             mOAuthAuthEndpointText.setVisibility(View.GONE);
1269             mOAuthTokenEndpointText.setVisibility(View.GONE);
1270             mUsernameInput.setVisibility(View.VISIBLE);
1271             mPasswordInput.setVisibility(View.VISIBLE);
1272         }
1273
1274     }
1275
1276     /**
1277      * Called from SslValidatorDialog when a new server certificate was correctly saved.
1278      */
1279     public void onSavedCertificate() {
1280         mOperationThread = mOcServerChkOperation.retry(this, mHandler);
1281     }
1282
1283     /**
1284      * Called from SslValidatorDialog when a new server certificate could not be saved
1285      * when the user requested it.
1286      */
1287     @Override
1288     public void onFailedSavingCertificate() {
1289         showDialog(DIALOG_CERT_NOT_SAVED);
1290     }
1291
1292
1293     /**
1294      *  Called when the 'action' button in an IME is pressed ('enter' in software keyboard).
1295      *
1296      *  Used to trigger the authorization check when the user presses 'enter' after writing the password.
1297      */
1298     @Override
1299     public boolean onEditorAction(TextView inputField, int actionId, KeyEvent event) {
1300         if (inputField != null && inputField.equals(mPasswordInput) &&
1301                 actionId == EditorInfo.IME_ACTION_DONE) {
1302             if (mOkButton.isEnabled()) {
1303                 mOkButton.performClick();
1304             }
1305         }
1306         return false;   // always return false to grant that the software keyboard is hidden anyway
1307     }
1308
1309
1310     private abstract static class RightDrawableOnTouchListener implements OnTouchListener  {
1311
1312         private int fuzz = 75;
1313
1314         /**
1315          * {@inheritDoc}
1316          */
1317         @Override
1318         public boolean onTouch(View view, MotionEvent event) {
1319             Drawable rightDrawable = null;
1320             if (view instanceof TextView) {
1321                 Drawable[] drawables = ((TextView)view).getCompoundDrawables();
1322                 if (drawables.length > 2) {
1323                     rightDrawable = drawables[2];
1324                 }
1325             }
1326             if (rightDrawable != null) {
1327                 final int x = (int) event.getX();
1328                 final int y = (int) event.getY();
1329                 final Rect bounds = rightDrawable.getBounds();
1330                 if (x >= (view.getRight() - bounds.width() - fuzz) && x <= (view.getRight() - view.getPaddingRight() + fuzz)
1331                     && y >= (view.getPaddingTop() - fuzz) && y <= (view.getHeight() - view.getPaddingBottom()) + fuzz) {
1332
1333                     return onDrawableTouch(event);
1334                 }
1335             }
1336             return false;
1337         }
1338
1339         public abstract boolean onDrawableTouch(final MotionEvent event);
1340     }
1341
1342 }