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