src/chrome/browser/ui/webui/local_discovery/local_discovery_ui_handler.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/ui/webui/local_discovery/local_discovery_ui_handler.h"
   6
   7 #include <set>
   8
   9 #include "base/bind.h"
  10 #include "base/command_line.h"
  11 #include "base/message_loop/message_loop.h"
  12 #include "base/prefs/pref_service.h"
  13 #include "base/strings/stringprintf.h"
  14 #include "base/strings/utf_string_conversions.h"
  15 #include "base/values.h"
  16 #include "chrome/browser/chrome_notification_types.h"
  17 #include "chrome/browser/local_discovery/privet_confirm_api_flow.h"
  18 #include "chrome/browser/local_discovery/privet_constants.h"
  19 #include "chrome/browser/local_discovery/privet_device_lister_impl.h"
  20 #include "chrome/browser/local_discovery/privet_http_asynchronous_factory.h"
  21 #include "chrome/browser/local_discovery/privet_http_impl.h"
  22 #include "chrome/browser/local_discovery/service_discovery_shared_client.h"
  23 #include "chrome/browser/printing/cloud_print/cloud_print_proxy_service.h"
  24 #include "chrome/browser/printing/cloud_print/cloud_print_proxy_service_factory.h"
  25 #include "chrome/browser/printing/cloud_print/cloud_print_url.h"
  26 #include "chrome/browser/profiles/profile.h"
  27 #include "chrome/browser/signin/profile_oauth2_token_service.h"
  28 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
  29 #include "chrome/browser/signin/signin_manager.h"
  30 #include "chrome/browser/signin/signin_manager_base.h"
  31 #include "chrome/browser/signin/signin_manager_factory.h"
  32 #include "chrome/browser/signin/signin_promo.h"
  33 #include "chrome/browser/ui/browser_finder.h"
  34 #include "chrome/browser/ui/browser_tabstrip.h"
  35 #include "chrome/common/chrome_switches.h"
  36 #include "chrome/common/pref_names.h"
  37 #include "content/public/browser/notification_source.h"
  38 #include "content/public/browser/user_metrics.h"
  39 #include "content/public/browser/user_metrics.h"
  40 #include "content/public/browser/web_ui.h"
  41 #include "content/public/common/page_transition_types.h"
  42 #include "grit/generated_resources.h"
  43 #include "net/base/host_port_pair.h"
  44 #include "net/base/net_util.h"
  45 #include "net/http/http_status_code.h"
  46 #include "ui/base/l10n/l10n_util.h"
  47
  48 #if defined(ENABLE_FULL_PRINTING) && !defined(OS_CHROMEOS) && \
  49   !defined(OS_MACOSX)
  50 #define CLOUD_PRINT_CONNECTOR_UI_AVAILABLE
  51 #endif
  52
  53 namespace local_discovery {
  54
  55 namespace {
  56 const char kPrivetAutomatedClaimURLFormat[] = "%s/confirm?token=%s";
  57
  58 int g_num_visible = 0;
  59 }  // namespace
  60
  61 LocalDiscoveryUIHandler::LocalDiscoveryUIHandler() : is_visible_(false) {
  62 #if defined(CLOUD_PRINT_CONNECTOR_UI_AVAILABLE)
  63 #if !defined(GOOGLE_CHROME_BUILD) && defined(OS_WIN)
  64   // On Windows, we need the PDF plugin which is only guaranteed to exist on
  65   // Google Chrome builds. Use a command-line switch for Windows non-Google
  66   //  Chrome builds.
  67   cloud_print_connector_ui_enabled_ =
  68       CommandLine::ForCurrentProcess()->HasSwitch(
  69       switches::kEnableCloudPrintProxy);
  70 #elif !defined(OS_CHROMEOS)
  71   // Always enabled for Linux and Google Chrome Windows builds.
  72   // Never enabled for Chrome OS, we don't even need to indicate it.
  73   cloud_print_connector_ui_enabled_ = true;
  74 #endif
  75 #endif  // !defined(OS_MACOSX)
  76 }
  77
  78 LocalDiscoveryUIHandler::~LocalDiscoveryUIHandler() {
  79   ResetCurrentRegistration();
  80   SetIsVisible(false);
  81 }
  82
  83 // static
  84 bool LocalDiscoveryUIHandler::GetHasVisible() {
  85   return g_num_visible != 0;
  86 }
  87
  88 void LocalDiscoveryUIHandler::RegisterMessages() {
  89   web_ui()->RegisterMessageCallback("start", base::Bind(
  90       &LocalDiscoveryUIHandler::HandleStart,
  91       base::Unretained(this)));
  92   web_ui()->RegisterMessageCallback("isVisible", base::Bind(
  93       &LocalDiscoveryUIHandler::HandleIsVisible,
  94       base::Unretained(this)));
  95   web_ui()->RegisterMessageCallback("registerDevice", base::Bind(
  96       &LocalDiscoveryUIHandler::HandleRegisterDevice,
  97       base::Unretained(this)));
  98   web_ui()->RegisterMessageCallback("cancelRegistration", base::Bind(
  99       &LocalDiscoveryUIHandler::HandleCancelRegistration,
 100       base::Unretained(this)));
 101   web_ui()->RegisterMessageCallback("requestPrinterList", base::Bind(
 102       &LocalDiscoveryUIHandler::HandleRequestPrinterList,
 103       base::Unretained(this)));
 104   web_ui()->RegisterMessageCallback("openCloudPrintURL", base::Bind(
 105       &LocalDiscoveryUIHandler::HandleOpenCloudPrintURL,
 106       base::Unretained(this)));
 107   web_ui()->RegisterMessageCallback("showSyncUI", base::Bind(
 108       &LocalDiscoveryUIHandler::HandleShowSyncUI,
 109       base::Unretained(this)));
 110
 111   // Cloud print connector related messages
 112 #if defined(CLOUD_PRINT_CONNECTOR_UI_AVAILABLE)
 113   if (cloud_print_connector_ui_enabled_) {
 114     web_ui()->RegisterMessageCallback(
 115         "showCloudPrintSetupDialog",
 116         base::Bind(&LocalDiscoveryUIHandler::ShowCloudPrintSetupDialog,
 117                    base::Unretained(this)));
 118     web_ui()->RegisterMessageCallback(
 119         "disableCloudPrintConnector",
 120         base::Bind(&LocalDiscoveryUIHandler::HandleDisableCloudPrintConnector,
 121                    base::Unretained(this)));
 122   }
 123 #endif  // defined(ENABLE_FULL_PRINTING)
 124 }
 125
 126 void LocalDiscoveryUIHandler::HandleStart(const base::ListValue* args) {
 127   Profile* profile = Profile::FromWebUI(web_ui());
 128
 129   // If privet_lister_ is already set, it is a mock used for tests or the result
 130   // of a reload.
 131   if (!privet_lister_) {
 132     service_discovery_client_ = ServiceDiscoverySharedClient::GetInstance();
 133     privet_lister_.reset(new PrivetDeviceListerImpl(
 134         service_discovery_client_.get(), this));
 135     privet_http_factory_ =
 136         PrivetHTTPAsynchronousFactory::CreateInstance(
 137             service_discovery_client_.get(), profile->GetRequestContext());
 138   }
 139
 140   privet_lister_->Start();
 141   privet_lister_->DiscoverNewDevices(false);
 142
 143 #if defined(CLOUD_PRINT_CONNECTOR_UI_AVAILABLE)
 144   StartCloudPrintConnector();
 145 #endif
 146
 147   CheckUserLoggedIn();
 148
 149   notification_registrar_.RemoveAll();
 150   notification_registrar_.Add(this,
 151                               chrome::NOTIFICATION_GOOGLE_SIGNIN_SUCCESSFUL,
 152                               content::Source<Profile>(profile));
 153   notification_registrar_.Add(this, chrome::NOTIFICATION_GOOGLE_SIGNED_OUT,
 154                               content::Source<Profile>(profile));
 155 }
 156
 157 void LocalDiscoveryUIHandler::HandleIsVisible(const base::ListValue* args) {
 158   bool is_visible = false;
 159   bool rv = args->GetBoolean(0, &is_visible);
 160   DCHECK(rv);
 161   SetIsVisible(is_visible);
 162 }
 163
 164 void LocalDiscoveryUIHandler::HandleRegisterDevice(
 165     const base::ListValue* args) {
 166   std::string device;
 167
 168   bool rv = args->GetString(0, &device);
 169   DCHECK(rv);
 170
 171   privet_resolution_ = privet_http_factory_->CreatePrivetHTTP(
 172       device,
 173       device_descriptions_[device].address,
 174       base::Bind(&LocalDiscoveryUIHandler::StartRegisterHTTP,
 175                  base::Unretained(this)));
 176   privet_resolution_->Start();
 177 }
 178
 179 void LocalDiscoveryUIHandler::HandleCancelRegistration(
 180     const base::ListValue* args) {
 181   ResetCurrentRegistration();
 182 }
 183
 184 void LocalDiscoveryUIHandler::HandleRequestPrinterList(
 185     const base::ListValue* args) {
 186   Profile* profile = Profile::FromWebUI(web_ui());
 187   ProfileOAuth2TokenService* token_service =
 188       ProfileOAuth2TokenServiceFactory::GetForProfile(profile);
 189
 190   SigninManagerBase* signin_manager =
 191       SigninManagerFactory::GetInstance()->GetForProfile(profile);
 192
 193   cloud_print_printer_list_.reset(new CloudPrintPrinterList(
 194       profile->GetRequestContext(),
 195       GetCloudPrintBaseUrl(),
 196       token_service,
 197       signin_manager->GetAuthenticatedAccountId(),
 198       this));
 199   cloud_print_printer_list_->Start();
 200 }
 201
 202 void LocalDiscoveryUIHandler::HandleOpenCloudPrintURL(
 203     const base::ListValue* args) {
 204   std::string url;
 205   bool rv = args->GetString(0, &url);
 206   DCHECK(rv);
 207
 208   GURL url_full(GetCloudPrintBaseUrl() + url);
 209
 210   Browser* browser = chrome::FindBrowserWithWebContents(
 211       web_ui()->GetWebContents());
 212   DCHECK(browser);
 213
 214   chrome::AddSelectedTabWithURL(browser,
 215                                 url_full,
 216                                 content::PAGE_TRANSITION_FROM_API);
 217 }
 218
 219 void LocalDiscoveryUIHandler::HandleShowSyncUI(
 220     const base::ListValue* args) {
 221   Browser* browser = chrome::FindBrowserWithWebContents(
 222       web_ui()->GetWebContents());
 223   DCHECK(browser);
 224
 225   // We use SOURCE_SETTINGS because the URL for SOURCE_SETTINGS is detected on
 226   // redirect.
 227   GURL url(signin::GetPromoURL(signin::SOURCE_SETTINGS,
 228                                true));  // auto close after success.
 229
 230   browser->OpenURL(
 231       content::OpenURLParams(url, content::Referrer(), SINGLETON_TAB,
 232                              content::PAGE_TRANSITION_AUTO_BOOKMARK, false));
 233 }
 234
 235 void LocalDiscoveryUIHandler::StartRegisterHTTP(
 236     scoped_ptr<PrivetHTTPClient> http_client) {
 237   current_http_client_.swap(http_client);
 238
 239   std::string user = GetSyncAccount();
 240
 241   if (!current_http_client_) {
 242     SendRegisterError();
 243     return;
 244   }
 245
 246   current_register_operation_ =
 247       current_http_client_->CreateRegisterOperation(user, this);
 248   current_register_operation_->Start();
 249 }
 250
 251 void LocalDiscoveryUIHandler::OnPrivetRegisterClaimToken(
 252     PrivetRegisterOperation* operation,
 253     const std::string& token,
 254     const GURL& url) {
 255   web_ui()->CallJavascriptFunction(
 256       "local_discovery.onRegistrationConfirmedOnPrinter");
 257   if (device_descriptions_.count(current_http_client_->GetName()) == 0) {
 258     SendRegisterError();
 259     return;
 260   }
 261
 262   std::string base_url = GetCloudPrintBaseUrl();
 263
 264   GURL automated_claim_url(base::StringPrintf(
 265       kPrivetAutomatedClaimURLFormat,
 266       base_url.c_str(),
 267       token.c_str()));
 268
 269   Profile* profile = Profile::FromWebUI(web_ui());
 270
 271   ProfileOAuth2TokenService* token_service =
 272       ProfileOAuth2TokenServiceFactory::GetForProfile(profile);
 273
 274   if (!token_service) {
 275     SendRegisterError();
 276     return;
 277   }
 278
 279   SigninManagerBase* signin_manager =
 280       SigninManagerFactory::GetInstance()->GetForProfile(profile);
 281   if (!signin_manager) {
 282     SendRegisterError();
 283     return;
 284   }
 285
 286   confirm_api_call_flow_.reset(new PrivetConfirmApiCallFlow(
 287       profile->GetRequestContext(),
 288       token_service,
 289       signin_manager->GetAuthenticatedAccountId(),
 290       automated_claim_url,
 291       base::Bind(&LocalDiscoveryUIHandler::OnConfirmDone,
 292                  base::Unretained(this))));
 293   confirm_api_call_flow_->Start();
 294 }
 295
 296 void LocalDiscoveryUIHandler::OnPrivetRegisterError(
 297     PrivetRegisterOperation* operation,
 298     const std::string& action,
 299     PrivetRegisterOperation::FailureReason reason,
 300     int printer_http_code,
 301     const base::DictionaryValue* json) {
 302   std::string error;
 303
 304   if (reason == PrivetRegisterOperation::FAILURE_JSON_ERROR &&
 305       json->GetString(kPrivetKeyError, &error)) {
 306     if (error == kPrivetErrorTimeout) {
 307         web_ui()->CallJavascriptFunction(
 308             "local_discovery.onRegistrationTimeout");
 309       return;
 310     } else if (error == kPrivetErrorCancel) {
 311       web_ui()->CallJavascriptFunction(
 312             "local_discovery.onRegistrationCanceledPrinter");
 313       return;
 314     }
 315   }
 316
 317   SendRegisterError();
 318 }
 319
 320 void LocalDiscoveryUIHandler::OnPrivetRegisterDone(
 321     PrivetRegisterOperation* operation,
 322     const std::string& device_id) {
 323   std::string name = operation->GetHTTPClient()->GetName();
 324
 325   current_register_operation_.reset();
 326   current_http_client_.reset();
 327
 328   // HACK(noamsml): Generate network traffic so the Windows firewall doesn't
 329   // block the printer's announcement.
 330   privet_lister_->DiscoverNewDevices(false);
 331
 332   DeviceDescriptionMap::iterator found = device_descriptions_.find(name);
 333
 334   if (found == device_descriptions_.end()) {
 335     // TODO(noamsml): Handle the case where a printer's record is not present at
 336     // the end of registration.
 337     SendRegisterError();
 338     return;
 339   }
 340
 341   SendRegisterDone(found->first, found->second);
 342 }
 343
 344 void LocalDiscoveryUIHandler::OnConfirmDone(
 345     CloudPrintBaseApiFlow::Status status) {
 346   if (status == CloudPrintBaseApiFlow::SUCCESS) {
 347     confirm_api_call_flow_.reset();
 348     current_register_operation_->CompleteRegistration();
 349   } else {
 350     SendRegisterError();
 351   }
 352 }
 353
 354 void LocalDiscoveryUIHandler::DeviceChanged(
 355     bool added,
 356     const std::string& name,
 357     const DeviceDescription& description) {
 358   device_descriptions_[name] = description;
 359
 360   base::DictionaryValue info;
 361
 362   base::StringValue service_name(name);
 363   scoped_ptr<base::Value> null_value(base::Value::CreateNullValue());
 364
 365   if (description.id.empty()) {
 366     info.SetString("service_name", name);
 367     info.SetString("human_readable_name", description.name);
 368     info.SetString("description", description.description);
 369
 370     web_ui()->CallJavascriptFunction(
 371         "local_discovery.onUnregisteredDeviceUpdate",
 372         service_name, info);
 373   } else {
 374     web_ui()->CallJavascriptFunction(
 375         "local_discovery.onUnregisteredDeviceUpdate",
 376         service_name, *null_value);
 377   }
 378 }
 379
 380 void LocalDiscoveryUIHandler::DeviceRemoved(const std::string& name) {
 381   device_descriptions_.erase(name);
 382   scoped_ptr<base::Value> null_value(base::Value::CreateNullValue());
 383   base::StringValue name_value(name);
 384
 385   web_ui()->CallJavascriptFunction("local_discovery.onUnregisteredDeviceUpdate",
 386                                    name_value, *null_value);
 387 }
 388
 389 void LocalDiscoveryUIHandler::DeviceCacheFlushed() {
 390   web_ui()->CallJavascriptFunction("local_discovery.onDeviceCacheFlushed");
 391   privet_lister_->DiscoverNewDevices(false);
 392 }
 393
 394 void LocalDiscoveryUIHandler::OnCloudPrintPrinterListReady() {
 395   base::ListValue printer_object_list;
 396   std::set<std::string> local_ids;
 397
 398   for (DeviceDescriptionMap::iterator i = device_descriptions_.begin();
 399        i != device_descriptions_.end();
 400        i++) {
 401     std::string device_id = i->second.id;
 402     if (!device_id.empty()) {
 403       const CloudPrintPrinterList::PrinterDetails* details =
 404           cloud_print_printer_list_->GetDetailsFor(device_id);
 405
 406       if (details) {
 407         local_ids.insert(device_id);
 408         printer_object_list.Append(CreatePrinterInfo(*details).release());
 409       }
 410     }
 411   }
 412
 413   for (CloudPrintPrinterList::iterator i = cloud_print_printer_list_->begin();
 414        i != cloud_print_printer_list_->end(); i++) {
 415     if (local_ids.count(i->id) == 0) {
 416       printer_object_list.Append(CreatePrinterInfo(*i).release());
 417     }
 418   }
 419
 420   web_ui()->CallJavascriptFunction(
 421       "local_discovery.onCloudDeviceListAvailable", printer_object_list);
 422 }
 423
 424 void LocalDiscoveryUIHandler::OnCloudPrintPrinterListUnavailable() {
 425   web_ui()->CallJavascriptFunction(
 426       "local_discovery.onCloudDeviceListUnavailable");
 427 }
 428
 429 void LocalDiscoveryUIHandler::Observe(
 430     int type,
 431     const content::NotificationSource& source,
 432     const content::NotificationDetails& details) {
 433   switch (type) {
 434     case chrome::NOTIFICATION_GOOGLE_SIGNIN_SUCCESSFUL:
 435     case chrome::NOTIFICATION_GOOGLE_SIGNED_OUT:
 436       CheckUserLoggedIn();
 437       break;
 438     default:
 439       NOTREACHED();
 440   }
 441 }
 442
 443 void LocalDiscoveryUIHandler::SendRegisterError() {
 444   web_ui()->CallJavascriptFunction("local_discovery.onRegistrationFailed");
 445 }
 446
 447 void LocalDiscoveryUIHandler::SendRegisterDone(
 448     const std::string& service_name, const DeviceDescription& device) {
 449   base::DictionaryValue printer_value;
 450
 451   printer_value.SetString("id", device.id);
 452   printer_value.SetString("display_name", device.name);
 453   printer_value.SetString("description", device.description);
 454   printer_value.SetString("service_name", service_name);
 455
 456   web_ui()->CallJavascriptFunction("local_discovery.onRegistrationSuccess",
 457                                    printer_value);
 458 }
 459
 460 void LocalDiscoveryUIHandler::SetIsVisible(bool visible) {
 461   if (visible != is_visible_) {
 462     g_num_visible += visible ? 1 : -1;
 463     is_visible_ = visible;
 464   }
 465 }
 466
 467 std::string LocalDiscoveryUIHandler::GetSyncAccount() {
 468   Profile* profile = Profile::FromWebUI(web_ui());
 469   SigninManagerBase* signin_manager =
 470       SigninManagerFactory::GetForProfileIfExists(profile);
 471
 472   if (!signin_manager) {
 473     return "";
 474   }
 475
 476   return signin_manager->GetAuthenticatedUsername();
 477 }
 478
 479 std::string LocalDiscoveryUIHandler::GetCloudPrintBaseUrl() {
 480   CloudPrintURL cloud_print_url(Profile::FromWebUI(web_ui()));
 481
 482   return cloud_print_url.GetCloudPrintServiceURL().spec();
 483 }
 484
 485 // TODO(noamsml): Create master object for registration flow.
 486 void LocalDiscoveryUIHandler::ResetCurrentRegistration() {
 487   if (current_register_operation_.get()) {
 488     current_register_operation_->Cancel();
 489     current_register_operation_.reset();
 490   }
 491
 492   confirm_api_call_flow_.reset();
 493   privet_resolution_.reset();
 494   current_http_client_.reset();
 495 }
 496
 497 scoped_ptr<base::DictionaryValue> LocalDiscoveryUIHandler::CreatePrinterInfo(
 498     const CloudPrintPrinterList::PrinterDetails& description) {
 499   scoped_ptr<base::DictionaryValue> return_value(new base::DictionaryValue);
 500
 501   return_value->SetString("id", description.id);
 502   return_value->SetString("display_name", description.display_name);
 503   return_value->SetString("description", description.description);
 504
 505   return return_value.Pass();
 506 }
 507
 508 void LocalDiscoveryUIHandler::CheckUserLoggedIn() {
 509   base::FundamentalValue logged_in_value(!GetSyncAccount().empty());
 510   web_ui()->CallJavascriptFunction("local_discovery.setUserLoggedIn",
 511                                    logged_in_value);
 512 }
 513
 514 #if defined(CLOUD_PRINT_CONNECTOR_UI_AVAILABLE)
 515 void LocalDiscoveryUIHandler::StartCloudPrintConnector() {
 516   Profile* profile = Profile::FromWebUI(web_ui());
 517
 518   base::Closure cloud_print_callback = base::Bind(
 519       &LocalDiscoveryUIHandler::OnCloudPrintPrefsChanged,
 520           base::Unretained(this));
 521
 522   if (cloud_print_connector_email_.GetPrefName().empty()) {
 523     cloud_print_connector_email_.Init(
 524         prefs::kCloudPrintEmail, profile->GetPrefs(), cloud_print_callback);
 525   }
 526
 527   if (cloud_print_connector_enabled_.GetPrefName().empty()) {
 528     cloud_print_connector_enabled_.Init(
 529         prefs::kCloudPrintProxyEnabled, profile->GetPrefs(),
 530         cloud_print_callback);
 531   }
 532
 533   if (cloud_print_connector_ui_enabled_) {
 534     SetupCloudPrintConnectorSection();
 535     RefreshCloudPrintStatusFromService();
 536   } else {
 537     RemoveCloudPrintConnectorSection();
 538   }
 539 }
 540
 541 void LocalDiscoveryUIHandler::OnCloudPrintPrefsChanged() {
 542   if (cloud_print_connector_ui_enabled_)
 543     SetupCloudPrintConnectorSection();
 544 }
 545
 546 void LocalDiscoveryUIHandler::ShowCloudPrintSetupDialog(
 547     const base::ListValue* args) {
 548   content::RecordAction(
 549       base::UserMetricsAction("Options_EnableCloudPrintProxy"));
 550   // Open the connector enable page in the current tab.
 551   Profile* profile = Profile::FromWebUI(web_ui());
 552   content::OpenURLParams params(
 553       CloudPrintURL(profile).GetCloudPrintServiceEnableURL(
 554           CloudPrintProxyServiceFactory::GetForProfile(profile)->proxy_id()),
 555       content::Referrer(), CURRENT_TAB, content::PAGE_TRANSITION_LINK, false);
 556   web_ui()->GetWebContents()->OpenURL(params);
 557 }
 558
 559 void LocalDiscoveryUIHandler::HandleDisableCloudPrintConnector(
 560     const base::ListValue* args) {
 561   content::RecordAction(
 562       base::UserMetricsAction("Options_DisableCloudPrintProxy"));
 563   CloudPrintProxyServiceFactory::GetForProfile(Profile::FromWebUI(web_ui()))->
 564       DisableForUser();
 565 }
 566
 567 void LocalDiscoveryUIHandler::SetupCloudPrintConnectorSection() {
 568   Profile* profile = Profile::FromWebUI(web_ui());
 569
 570   if (!CloudPrintProxyServiceFactory::GetForProfile(profile)) {
 571     cloud_print_connector_ui_enabled_ = false;
 572     RemoveCloudPrintConnectorSection();
 573     return;
 574   }
 575
 576   bool cloud_print_connector_allowed =
 577       !cloud_print_connector_enabled_.IsManaged() ||
 578       cloud_print_connector_enabled_.GetValue();
 579   base::FundamentalValue allowed(cloud_print_connector_allowed);
 580
 581   std::string email;
 582   if (profile->GetPrefs()->HasPrefPath(prefs::kCloudPrintEmail) &&
 583       cloud_print_connector_allowed) {
 584     email = profile->GetPrefs()->GetString(prefs::kCloudPrintEmail);
 585   }
 586   base::FundamentalValue disabled(email.empty());
 587
 588   base::string16 label_str;
 589   if (email.empty()) {
 590     label_str = l10n_util::GetStringFUTF16(
 591         IDS_LOCAL_DISCOVERY_CLOUD_PRINT_CONNECTOR_DISABLED_LABEL,
 592         l10n_util::GetStringUTF16(IDS_GOOGLE_CLOUD_PRINT));
 593   } else {
 594     label_str = l10n_util::GetStringFUTF16(
 595         IDS_OPTIONS_CLOUD_PRINT_CONNECTOR_ENABLED_LABEL,
 596         l10n_util::GetStringUTF16(IDS_GOOGLE_CLOUD_PRINT),
 597         base::UTF8ToUTF16(email));
 598   }
 599   base::StringValue label(label_str);
 600
 601   web_ui()->CallJavascriptFunction(
 602       "local_discovery.setupCloudPrintConnectorSection", disabled, label,
 603       allowed);
 604 }
 605
 606 void LocalDiscoveryUIHandler::RemoveCloudPrintConnectorSection() {
 607   web_ui()->CallJavascriptFunction(
 608       "local_discovery.removeCloudPrintConnectorSection");
 609 }
 610
 611 void LocalDiscoveryUIHandler::RefreshCloudPrintStatusFromService() {
 612   if (cloud_print_connector_ui_enabled_)
 613     CloudPrintProxyServiceFactory::GetForProfile(Profile::FromWebUI(web_ui()))->
 614         RefreshStatusFromService();
 615 }
 616 #endif // cloud print connector option stuff
 617
 618 }  // namespace local_discovery