src/chrome/browser/notifications/desktop_notification_service.cc

   1 // Copyright (c) 2012 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/notifications/desktop_notification_service.h"
   6
   7 #include "base/bind.h"
   8 #include "base/metrics/histogram.h"
   9 #include "base/prefs/scoped_user_pref_update.h"
  10 #include "base/strings/utf_string_conversions.h"
  11 #include "base/threading/thread.h"
  12 #include "chrome/browser/browser_process.h"
  13 #include "chrome/browser/chrome_notification_types.h"
  14 #include "chrome/browser/content_settings/content_settings_details.h"
  15 #include "chrome/browser/content_settings/content_settings_provider.h"
  16 #include "chrome/browser/content_settings/host_content_settings_map.h"
  17 #include "chrome/browser/infobars/confirm_infobar_delegate.h"
  18 #include "chrome/browser/infobars/infobar_service.h"
  19 #include "chrome/browser/notifications/desktop_notification_service_factory.h"
  20 #include "chrome/browser/notifications/notification.h"
  21 #include "chrome/browser/notifications/notification_object_proxy.h"
  22 #include "chrome/browser/notifications/notification_ui_manager.h"
  23 #include "chrome/browser/notifications/sync_notifier/chrome_notifier_service.h"
  24 #include "chrome/browser/notifications/sync_notifier/chrome_notifier_service_factory.h"
  25 #include "chrome/browser/profiles/profile.h"
  26 #include "chrome/browser/ui/browser.h"
  27 #include "chrome/browser/ui/website_settings/permission_bubble_manager.h"
  28 #include "chrome/browser/ui/website_settings/permission_bubble_request.h"
  29 #include "chrome/common/content_settings.h"
  30 #include "chrome/common/content_settings_pattern.h"
  31 #include "chrome/common/pref_names.h"
  32 #include "chrome/common/url_constants.h"
  33 #include "components/infobars/core/infobar.h"
  34 #include "components/user_prefs/pref_registry_syncable.h"
  35 #include "content/public/browser/browser_thread.h"
  36 #include "content/public/browser/notification_service.h"
  37 #include "content/public/browser/render_frame_host.h"
  38 #include "content/public/browser/render_process_host.h"
  39 #include "content/public/browser/render_view_host.h"
  40 #include "content/public/browser/web_contents.h"
  41 #include "content/public/common/show_desktop_notification_params.h"
  42 #include "grit/browser_resources.h"
  43 #include "grit/chromium_strings.h"
  44 #include "grit/generated_resources.h"
  45 #include "grit/theme_resources.h"
  46 #include "net/base/escape.h"
  47 #include "ui/base/l10n/l10n_util.h"
  48 #include "ui/base/resource/resource_bundle.h"
  49 #include "ui/base/webui/web_ui_util.h"
  50 #include "ui/message_center/notifier_settings.h"
  51
  52 #if defined(ENABLE_EXTENSIONS)
  53 #include "chrome/browser/extensions/api/notifications/notifications_api.h"
  54 #include "chrome/browser/extensions/extension_service.h"
  55 #include "extensions/browser/event_router.h"
  56 #include "extensions/browser/extension_system.h"
  57 #include "extensions/browser/info_map.h"
  58 #include "extensions/common/constants.h"
  59 #include "extensions/common/extension.h"
  60 #include "extensions/common/extension_set.h"
  61 #endif
  62
  63 using blink::WebTextDirection;
  64 using content::BrowserThread;
  65 using content::RenderViewHost;
  66 using content::WebContents;
  67 using message_center::NotifierId;
  68
  69 namespace {
  70
  71 const char kChromeNowExtensionID[] = "pafkbggdmjlpgkdkcbjmhmfcdpncadgh";
  72
  73 // NotificationPermissionRequest ---------------------------------------
  74
  75 class NotificationPermissionRequest : public PermissionBubbleRequest {
  76  public:
  77   NotificationPermissionRequest(
  78       DesktopNotificationService* notification_service,
  79       const GURL& origin,
  80       base::string16 display_name,
  81       const base::Closure& callback);
  82   virtual ~NotificationPermissionRequest();
  83
  84   // PermissionBubbleDelegate:
  85   virtual int GetIconID() const OVERRIDE;
  86   virtual base::string16 GetMessageText() const OVERRIDE;
  87   virtual base::string16 GetMessageTextFragment() const OVERRIDE;
  88   virtual bool HasUserGesture() const OVERRIDE;
  89   virtual GURL GetRequestingHostname() const OVERRIDE;
  90   virtual void PermissionGranted() OVERRIDE;
  91   virtual void PermissionDenied() OVERRIDE;
  92   virtual void Cancelled() OVERRIDE;
  93   virtual void RequestFinished() OVERRIDE;
  94
  95  private:
  96   // The notification service to be used.
  97   DesktopNotificationService* notification_service_;
  98
  99   // The origin we are asking for permissions on.
 100   GURL origin_;
 101
 102   // The display name for the origin to be displayed.  Will be different from
 103   // origin_ for extensions.
 104   base::string16 display_name_;
 105
 106   // The callback information that tells us how to respond to javascript.
 107   base::Closure callback_;
 108
 109   // Whether the user clicked one of the buttons.
 110   bool action_taken_;
 111
 112   DISALLOW_COPY_AND_ASSIGN(NotificationPermissionRequest);
 113 };
 114
 115 NotificationPermissionRequest::NotificationPermissionRequest(
 116     DesktopNotificationService* notification_service,
 117     const GURL& origin,
 118     base::string16 display_name,
 119     const base::Closure& callback)
 120     : notification_service_(notification_service),
 121       origin_(origin),
 122       display_name_(display_name),
 123       callback_(callback),
 124       action_taken_(false) {}
 125
 126 NotificationPermissionRequest::~NotificationPermissionRequest() {}
 127
 128 int NotificationPermissionRequest::GetIconID() const {
 129   return IDR_INFOBAR_DESKTOP_NOTIFICATIONS;
 130 }
 131
 132 base::string16 NotificationPermissionRequest::GetMessageText() const {
 133   return l10n_util::GetStringFUTF16(IDS_NOTIFICATION_PERMISSIONS,
 134                                     display_name_);
 135 }
 136
 137 base::string16
 138 NotificationPermissionRequest::GetMessageTextFragment() const {
 139   return l10n_util::GetStringUTF16(IDS_NOTIFICATION_PERMISSIONS_FRAGMENT);
 140 }
 141
 142 bool NotificationPermissionRequest::HasUserGesture() const {
 143   // Currently notification permission requests are only issued on
 144   // user gesture.
 145   return true;
 146 }
 147
 148 GURL NotificationPermissionRequest::GetRequestingHostname() const {
 149   return origin_;
 150 }
 151
 152 void NotificationPermissionRequest::PermissionGranted() {
 153   action_taken_ = true;
 154   UMA_HISTOGRAM_COUNTS("NotificationPermissionRequest.Allowed", 1);
 155   notification_service_->GrantPermission(origin_);
 156 }
 157
 158 void NotificationPermissionRequest::PermissionDenied() {
 159   action_taken_ = true;
 160   UMA_HISTOGRAM_COUNTS("NotificationPermissionRequest.Denied", 1);
 161   notification_service_->DenyPermission(origin_);
 162 }
 163
 164 void NotificationPermissionRequest::Cancelled() {
 165 }
 166
 167 void NotificationPermissionRequest::RequestFinished() {
 168   if (!action_taken_)
 169     UMA_HISTOGRAM_COUNTS("NotificationPermissionRequest.Ignored", 1);
 170
 171   callback_.Run();
 172
 173   delete this;
 174 }
 175
 176
 177 // NotificationPermissionInfoBarDelegate --------------------------------------
 178
 179 // The delegate for the infobar shown when an origin requests notification
 180 // permissions.
 181 class NotificationPermissionInfoBarDelegate : public ConfirmInfoBarDelegate {
 182  public:
 183   // Creates a notification permission infobar and delegate and adds the infobar
 184   // to |infobar_service|.
 185   static void Create(InfoBarService* infobar_service,
 186                      DesktopNotificationService* notification_service,
 187                      const GURL& origin,
 188                      const base::string16& display_name,
 189                      const base::Closure& callback);
 190
 191  private:
 192   NotificationPermissionInfoBarDelegate(
 193       DesktopNotificationService* notification_service,
 194       const GURL& origin,
 195       const base::string16& display_name,
 196       const base::Closure& callback);
 197   virtual ~NotificationPermissionInfoBarDelegate();
 198
 199   // ConfirmInfoBarDelegate:
 200   virtual int GetIconID() const OVERRIDE;
 201   virtual Type GetInfoBarType() const OVERRIDE;
 202   virtual base::string16 GetMessageText() const OVERRIDE;
 203   virtual base::string16 GetButtonLabel(InfoBarButton button) const OVERRIDE;
 204   virtual bool Accept() OVERRIDE;
 205   virtual bool Cancel() OVERRIDE;
 206
 207   // The origin we are asking for permissions on.
 208   GURL origin_;
 209
 210   // The display name for the origin to be displayed.  Will be different from
 211   // origin_ for extensions.
 212   base::string16 display_name_;
 213
 214   // The notification service to be used.
 215   DesktopNotificationService* notification_service_;
 216
 217   // The callback information that tells us how to respond to javascript.
 218   base::Closure callback_;
 219
 220   // Whether the user clicked one of the buttons.
 221   bool action_taken_;
 222
 223   DISALLOW_COPY_AND_ASSIGN(NotificationPermissionInfoBarDelegate);
 224 };
 225
 226 // static
 227 void NotificationPermissionInfoBarDelegate::Create(
 228     InfoBarService* infobar_service,
 229     DesktopNotificationService* notification_service,
 230     const GURL& origin,
 231     const base::string16& display_name,
 232     const base::Closure& callback) {
 233   infobar_service->AddInfoBar(ConfirmInfoBarDelegate::CreateInfoBar(
 234       scoped_ptr<ConfirmInfoBarDelegate>(
 235           new NotificationPermissionInfoBarDelegate(
 236               notification_service, origin, display_name, callback))));
 237 }
 238
 239 NotificationPermissionInfoBarDelegate::NotificationPermissionInfoBarDelegate(
 240     DesktopNotificationService* notification_service,
 241     const GURL& origin,
 242     const base::string16& display_name,
 243     const base::Closure& callback)
 244     : ConfirmInfoBarDelegate(),
 245       origin_(origin),
 246       display_name_(display_name),
 247       notification_service_(notification_service),
 248       callback_(callback),
 249       action_taken_(false) {
 250 }
 251
 252 NotificationPermissionInfoBarDelegate::
 253     ~NotificationPermissionInfoBarDelegate() {
 254   if (!action_taken_)
 255     UMA_HISTOGRAM_COUNTS("NotificationPermissionRequest.Ignored", 1);
 256
 257   callback_.Run();
 258 }
 259
 260 int NotificationPermissionInfoBarDelegate::GetIconID() const {
 261   return IDR_INFOBAR_DESKTOP_NOTIFICATIONS;
 262 }
 263
 264 infobars::InfoBarDelegate::Type
 265 NotificationPermissionInfoBarDelegate::GetInfoBarType() const {
 266   return PAGE_ACTION_TYPE;
 267 }
 268
 269 base::string16 NotificationPermissionInfoBarDelegate::GetMessageText() const {
 270   return l10n_util::GetStringFUTF16(IDS_NOTIFICATION_PERMISSIONS,
 271                                     display_name_);
 272 }
 273
 274 base::string16 NotificationPermissionInfoBarDelegate::GetButtonLabel(
 275     InfoBarButton button) const {
 276   return l10n_util::GetStringUTF16((button == BUTTON_OK) ?
 277       IDS_NOTIFICATION_PERMISSION_YES : IDS_NOTIFICATION_PERMISSION_NO);
 278 }
 279
 280 bool NotificationPermissionInfoBarDelegate::Accept() {
 281   UMA_HISTOGRAM_COUNTS("NotificationPermissionRequest.Allowed", 1);
 282   notification_service_->GrantPermission(origin_);
 283   action_taken_ = true;
 284   return true;
 285 }
 286
 287 bool NotificationPermissionInfoBarDelegate::Cancel() {
 288   UMA_HISTOGRAM_COUNTS("NotificationPermissionRequest.Denied", 1);
 289   notification_service_->DenyPermission(origin_);
 290   action_taken_ = true;
 291   return true;
 292 }
 293
 294 void CancelNotification(const std::string& id) {
 295   g_browser_process->notification_ui_manager()->CancelById(id);
 296 }
 297
 298 }  // namespace
 299
 300
 301 // DesktopNotificationService -------------------------------------------------
 302
 303 // static
 304 void DesktopNotificationService::RegisterProfilePrefs(
 305     user_prefs::PrefRegistrySyncable* registry) {
 306   registry->RegisterListPref(
 307       prefs::kMessageCenterDisabledExtensionIds,
 308       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 309   registry->RegisterListPref(
 310       prefs::kMessageCenterDisabledSystemComponentIds,
 311       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 312   registry->RegisterListPref(
 313       prefs::kMessageCenterEnabledSyncNotifierIds,
 314       user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 315   ExtensionWelcomeNotification::RegisterProfilePrefs(registry);
 316 }
 317
 318 // static
 319 base::string16 DesktopNotificationService::CreateDataUrl(
 320     const GURL& icon_url,
 321     const base::string16& title,
 322     const base::string16& body,
 323     WebTextDirection dir) {
 324   int resource;
 325   std::vector<std::string> subst;
 326   if (icon_url.is_valid()) {
 327     resource = IDR_NOTIFICATION_ICON_HTML;
 328     subst.push_back(icon_url.spec());
 329     subst.push_back(net::EscapeForHTML(base::UTF16ToUTF8(title)));
 330     subst.push_back(net::EscapeForHTML(base::UTF16ToUTF8(body)));
 331     // icon float position
 332     subst.push_back(dir == blink::WebTextDirectionRightToLeft ?
 333                     "right" : "left");
 334   } else if (title.empty() || body.empty()) {
 335     resource = IDR_NOTIFICATION_1LINE_HTML;
 336     base::string16 line = title.empty() ? body : title;
 337     // Strings are div names in the template file.
 338     base::string16 line_name =
 339         title.empty() ? base::ASCIIToUTF16("description")
 340                       : base::ASCIIToUTF16("title");
 341     subst.push_back(net::EscapeForHTML(base::UTF16ToUTF8(line_name)));
 342     subst.push_back(net::EscapeForHTML(base::UTF16ToUTF8(line)));
 343   } else {
 344     resource = IDR_NOTIFICATION_2LINE_HTML;
 345     subst.push_back(net::EscapeForHTML(base::UTF16ToUTF8(title)));
 346     subst.push_back(net::EscapeForHTML(base::UTF16ToUTF8(body)));
 347   }
 348   // body text direction
 349   subst.push_back(dir == blink::WebTextDirectionRightToLeft ?
 350                   "rtl" : "ltr");
 351
 352   return CreateDataUrl(resource, subst);
 353 }
 354
 355 // static
 356 base::string16 DesktopNotificationService::CreateDataUrl(
 357     int resource, const std::vector<std::string>& subst) {
 358   const base::StringPiece template_html(
 359       ResourceBundle::GetSharedInstance().GetRawDataResource(
 360           resource));
 361
 362   if (template_html.empty()) {
 363     NOTREACHED() << "unable to load template. ID: " << resource;
 364     return base::string16();
 365   }
 366
 367   std::string data = ReplaceStringPlaceholders(template_html, subst, NULL);
 368   return base::UTF8ToUTF16("data:text/html;charset=utf-8," +
 369                                net::EscapeQueryParamValue(data, false));
 370 }
 371
 372 // static
 373 std::string DesktopNotificationService::AddIconNotification(
 374     const GURL& origin_url,
 375     const base::string16& title,
 376     const base::string16& message,
 377     const gfx::Image& icon,
 378     const base::string16& replace_id,
 379     NotificationDelegate* delegate,
 380     Profile* profile) {
 381   Notification notification(origin_url, icon, title, message,
 382                             blink::WebTextDirectionDefault,
 383                             base::string16(), replace_id, delegate);
 384   g_browser_process->notification_ui_manager()->Add(notification, profile);
 385   return notification.notification_id();
 386 }
 387
 388 DesktopNotificationService::DesktopNotificationService(
 389     Profile* profile,
 390     NotificationUIManager* ui_manager)
 391     : profile_(profile),
 392       ui_manager_(ui_manager) {
 393   OnStringListPrefChanged(
 394       prefs::kMessageCenterDisabledExtensionIds, &disabled_extension_ids_);
 395   OnStringListPrefChanged(
 396       prefs::kMessageCenterDisabledSystemComponentIds,
 397       &disabled_system_component_ids_);
 398   OnStringListPrefChanged(
 399       prefs::kMessageCenterEnabledSyncNotifierIds, &enabled_sync_notifier_ids_);
 400   disabled_extension_id_pref_.Init(
 401       prefs::kMessageCenterDisabledExtensionIds,
 402       profile_->GetPrefs(),
 403       base::Bind(
 404           &DesktopNotificationService::OnStringListPrefChanged,
 405           base::Unretained(this),
 406           base::Unretained(prefs::kMessageCenterDisabledExtensionIds),
 407           base::Unretained(&disabled_extension_ids_)));
 408   disabled_system_component_id_pref_.Init(
 409       prefs::kMessageCenterDisabledSystemComponentIds,
 410       profile_->GetPrefs(),
 411       base::Bind(
 412           &DesktopNotificationService::OnStringListPrefChanged,
 413           base::Unretained(this),
 414           base::Unretained(prefs::kMessageCenterDisabledSystemComponentIds),
 415           base::Unretained(&disabled_system_component_ids_)));
 416   enabled_sync_notifier_id_pref_.Init(
 417       prefs::kMessageCenterEnabledSyncNotifierIds,
 418       profile_->GetPrefs(),
 419       base::Bind(
 420           &DesktopNotificationService::OnStringListPrefChanged,
 421           base::Unretained(this),
 422           base::Unretained(prefs::kMessageCenterEnabledSyncNotifierIds),
 423           base::Unretained(&enabled_sync_notifier_ids_)));
 424   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNINSTALLED,
 425                  content::Source<Profile>(profile_));
 426 }
 427
 428 DesktopNotificationService::~DesktopNotificationService() {
 429 }
 430
 431 void DesktopNotificationService::GrantPermission(const GURL& origin) {
 432   ContentSettingsPattern primary_pattern =
 433       ContentSettingsPattern::FromURLNoWildcard(origin);
 434   profile_->GetHostContentSettingsMap()->SetContentSetting(
 435       primary_pattern,
 436       ContentSettingsPattern::Wildcard(),
 437       CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
 438       NO_RESOURCE_IDENTIFIER,
 439       CONTENT_SETTING_ALLOW);
 440 }
 441
 442 void DesktopNotificationService::DenyPermission(const GURL& origin) {
 443   ContentSettingsPattern primary_pattern =
 444       ContentSettingsPattern::FromURLNoWildcard(origin);
 445   profile_->GetHostContentSettingsMap()->SetContentSetting(
 446       primary_pattern,
 447       ContentSettingsPattern::Wildcard(),
 448       CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
 449       NO_RESOURCE_IDENTIFIER,
 450       CONTENT_SETTING_BLOCK);
 451 }
 452
 453 ContentSetting DesktopNotificationService::GetDefaultContentSetting(
 454     std::string* provider_id) {
 455   return profile_->GetHostContentSettingsMap()->GetDefaultContentSetting(
 456       CONTENT_SETTINGS_TYPE_NOTIFICATIONS, provider_id);
 457 }
 458
 459 void DesktopNotificationService::SetDefaultContentSetting(
 460     ContentSetting setting) {
 461   profile_->GetHostContentSettingsMap()->SetDefaultContentSetting(
 462       CONTENT_SETTINGS_TYPE_NOTIFICATIONS, setting);
 463 }
 464
 465 void DesktopNotificationService::ResetToDefaultContentSetting() {
 466   profile_->GetHostContentSettingsMap()->SetDefaultContentSetting(
 467       CONTENT_SETTINGS_TYPE_NOTIFICATIONS, CONTENT_SETTING_DEFAULT);
 468 }
 469
 470 void DesktopNotificationService::GetNotificationsSettings(
 471     ContentSettingsForOneType* settings) {
 472   profile_->GetHostContentSettingsMap()->GetSettingsForOneType(
 473       CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
 474       NO_RESOURCE_IDENTIFIER,
 475       settings);
 476 }
 477
 478 void DesktopNotificationService::ClearSetting(
 479     const ContentSettingsPattern& pattern) {
 480   profile_->GetHostContentSettingsMap()->SetContentSetting(
 481       pattern,
 482       ContentSettingsPattern::Wildcard(),
 483       CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
 484       NO_RESOURCE_IDENTIFIER,
 485       CONTENT_SETTING_DEFAULT);
 486 }
 487
 488 void DesktopNotificationService::ResetAllOrigins() {
 489   profile_->GetHostContentSettingsMap()->ClearSettingsForOneType(
 490       CONTENT_SETTINGS_TYPE_NOTIFICATIONS);
 491 }
 492
 493 ContentSetting DesktopNotificationService::GetContentSetting(
 494     const GURL& origin) {
 495   return profile_->GetHostContentSettingsMap()->GetContentSetting(
 496       origin,
 497       origin,
 498       CONTENT_SETTINGS_TYPE_NOTIFICATIONS,
 499       NO_RESOURCE_IDENTIFIER);
 500 }
 501
 502 void DesktopNotificationService::RequestPermission(
 503     const GURL& origin,
 504     content::RenderFrameHost* render_frame_host,
 505     const base::Closure& callback) {
 506   // If |origin| hasn't been seen before and the default content setting for
 507   // notifications is "ask", show an infobar.
 508   // The cache can only answer queries on the IO thread once it's initialized,
 509   // so don't ask the cache.
 510   WebContents* web_contents = WebContents::FromRenderFrameHost(
 511       render_frame_host);
 512   ContentSetting setting = GetContentSetting(origin);
 513   if (setting == CONTENT_SETTING_ASK) {
 514     if (PermissionBubbleManager::Enabled()) {
 515       PermissionBubbleManager* bubble_manager =
 516           PermissionBubbleManager::FromWebContents(web_contents);
 517       bubble_manager->AddRequest(new NotificationPermissionRequest(
 518           this,
 519           origin,
 520           DisplayNameForOriginInProcessId(
 521               origin, render_frame_host->GetProcess()->GetID()),
 522           callback));
 523       return;
 524     }
 525
 526     // Show an info bar requesting permission.
 527     InfoBarService* infobar_service =
 528         InfoBarService::FromWebContents(web_contents);
 529     // |infobar_service| may be NULL, e.g., if this request originated in a
 530     // browser action popup, extension background page, or any HTML that runs
 531     // outside of a tab.
 532     if (infobar_service) {
 533       NotificationPermissionInfoBarDelegate::Create(
 534           infobar_service, this, origin,
 535           DisplayNameForOriginInProcessId(
 536               origin, render_frame_host->GetProcess()->GetID()),
 537           callback);
 538       return;
 539     }
 540   }
 541
 542   // Notify renderer immediately.
 543   callback.Run();
 544 }
 545
 546 void DesktopNotificationService::ShowDesktopNotification(
 547     const content::ShowDesktopNotificationHostMsgParams& params,
 548     content::RenderFrameHost* render_frame_host,
 549     content::DesktopNotificationDelegate* delegate,
 550     base::Closure* cancel_callback) {
 551   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 552   const GURL& origin = params.origin;
 553   NotificationObjectProxy* proxy =
 554       new NotificationObjectProxy(render_frame_host, delegate);
 555
 556   base::string16 display_source = DisplayNameForOriginInProcessId(
 557       origin, render_frame_host->GetProcess()->GetID());
 558   Notification notification(origin, params.icon_url, params.title,
 559       params.body, params.direction, display_source, params.replace_id,
 560       proxy);
 561
 562   // The webkit notification doesn't timeout.
 563   notification.set_never_timeout(true);
 564
 565   GetUIManager()->Add(notification, profile_);
 566   if (cancel_callback)
 567     *cancel_callback = base::Bind(&CancelNotification, proxy->id());
 568 }
 569
 570 base::string16 DesktopNotificationService::DisplayNameForOriginInProcessId(
 571     const GURL& origin, int process_id) {
 572 #if defined(ENABLE_EXTENSIONS)
 573   // If the source is an extension, lookup the display name.
 574   if (origin.SchemeIs(extensions::kExtensionScheme)) {
 575     extensions::InfoMap* extension_info_map =
 576         extensions::ExtensionSystem::Get(profile_)->info_map();
 577     if (extension_info_map) {
 578       extensions::ExtensionSet extensions;
 579       extension_info_map->GetExtensionsWithAPIPermissionForSecurityOrigin(
 580           origin, process_id, extensions::APIPermission::kNotification,
 581           &extensions);
 582       for (extensions::ExtensionSet::const_iterator iter = extensions.begin();
 583            iter != extensions.end(); ++iter) {
 584         NotifierId notifier_id(NotifierId::APPLICATION, (*iter)->id());
 585         if (IsNotifierEnabled(notifier_id))
 586           return base::UTF8ToUTF16((*iter)->name());
 587       }
 588     }
 589   }
 590 #endif
 591
 592   return base::UTF8ToUTF16(origin.host());
 593 }
 594
 595 void DesktopNotificationService::NotifySettingsChange() {
 596   content::NotificationService::current()->Notify(
 597       chrome::NOTIFICATION_DESKTOP_NOTIFICATION_SETTINGS_CHANGED,
 598       content::Source<DesktopNotificationService>(this),
 599       content::NotificationService::NoDetails());
 600 }
 601
 602 NotificationUIManager* DesktopNotificationService::GetUIManager() {
 603   // We defer setting ui_manager_ to the global singleton until we need it
 604   // in order to avoid UI dependent construction during startup.
 605   if (!ui_manager_)
 606     ui_manager_ = g_browser_process->notification_ui_manager();
 607   return ui_manager_;
 608 }
 609
 610 bool DesktopNotificationService::IsNotifierEnabled(
 611     const NotifierId& notifier_id) {
 612   switch (notifier_id.type) {
 613     case NotifierId::APPLICATION:
 614       return disabled_extension_ids_.find(notifier_id.id) ==
 615           disabled_extension_ids_.end();
 616     case NotifierId::WEB_PAGE:
 617       return GetContentSetting(notifier_id.url) == CONTENT_SETTING_ALLOW;
 618     case NotifierId::SYSTEM_COMPONENT:
 619 #if defined(OS_CHROMEOS)
 620       return disabled_system_component_ids_.find(notifier_id.id) ==
 621           disabled_system_component_ids_.end();
 622 #else
 623       // We do not disable system component notifications.
 624       return true;
 625 #endif
 626     case NotifierId::SYNCED_NOTIFICATION_SERVICE:
 627       return enabled_sync_notifier_ids_.find(notifier_id.id) !=
 628           enabled_sync_notifier_ids_.end();
 629   }
 630
 631   NOTREACHED();
 632   return false;
 633 }
 634
 635 void DesktopNotificationService::SetNotifierEnabled(
 636     const NotifierId& notifier_id,
 637     bool enabled) {
 638   DCHECK_NE(NotifierId::WEB_PAGE, notifier_id.type);
 639
 640   bool add_new_item = false;
 641   const char* pref_name = NULL;
 642   scoped_ptr<base::StringValue> id;
 643   switch (notifier_id.type) {
 644     case NotifierId::APPLICATION:
 645       pref_name = prefs::kMessageCenterDisabledExtensionIds;
 646       add_new_item = !enabled;
 647       id.reset(new base::StringValue(notifier_id.id));
 648       FirePermissionLevelChangedEvent(notifier_id, enabled);
 649       break;
 650     case NotifierId::SYSTEM_COMPONENT:
 651 #if defined(OS_CHROMEOS)
 652       pref_name = prefs::kMessageCenterDisabledSystemComponentIds;
 653       add_new_item = !enabled;
 654       id.reset(new base::StringValue(notifier_id.id));
 655 #else
 656       return;
 657 #endif
 658       break;
 659     case NotifierId::SYNCED_NOTIFICATION_SERVICE:
 660       pref_name = prefs::kMessageCenterEnabledSyncNotifierIds;
 661       // Adding a new item if |enabled| == true, since synced notification
 662       // services are opt-in.
 663       add_new_item = enabled;
 664       id.reset(new base::StringValue(notifier_id.id));
 665       break;
 666     default:
 667       NOTREACHED();
 668   }
 669   DCHECK(pref_name != NULL);
 670
 671   ListPrefUpdate update(profile_->GetPrefs(), pref_name);
 672   base::ListValue* const list = update.Get();
 673   if (add_new_item) {
 674     // AppendIfNotPresent will delete |adding_value| when the same value
 675     // already exists.
 676     list->AppendIfNotPresent(id.release());
 677   } else {
 678     list->Remove(*id, NULL);
 679   }
 680 }
 681
 682 void DesktopNotificationService::ShowWelcomeNotificationIfNecessary(
 683     const Notification& notification) {
 684   if (!chrome_now_welcome_notification_) {
 685     chrome_now_welcome_notification_ =
 686         ExtensionWelcomeNotification::Create(kChromeNowExtensionID, profile_);
 687   }
 688
 689   if (chrome_now_welcome_notification_) {
 690     chrome_now_welcome_notification_->ShowWelcomeNotificationIfNecessary(
 691         notification);
 692   }
 693 }
 694
 695 void DesktopNotificationService::OnStringListPrefChanged(
 696     const char* pref_name, std::set<std::string>* ids_field) {
 697   ids_field->clear();
 698   // Separate GetPrefs()->GetList() to analyze the crash. See crbug.com/322320
 699   const PrefService* pref_service = profile_->GetPrefs();
 700   CHECK(pref_service);
 701   const base::ListValue* pref_list = pref_service->GetList(pref_name);
 702   for (size_t i = 0; i < pref_list->GetSize(); ++i) {
 703     std::string element;
 704     if (pref_list->GetString(i, &element) && !element.empty())
 705       ids_field->insert(element);
 706     else
 707       LOG(WARNING) << i << "-th element is not a string for " << pref_name;
 708   }
 709 }
 710
 711 void DesktopNotificationService::Observe(
 712     int type,
 713     const content::NotificationSource& source,
 714     const content::NotificationDetails& details) {
 715 #if defined(ENABLE_EXTENSIONS)
 716   DCHECK_EQ(chrome::NOTIFICATION_EXTENSION_UNINSTALLED, type);
 717
 718   extensions::Extension* extension =
 719       content::Details<extensions::Extension>(details).ptr();
 720   NotifierId notifier_id(NotifierId::APPLICATION, extension->id());
 721   if (IsNotifierEnabled(notifier_id))
 722     return;
 723
 724   // The settings for ephemeral apps will be persisted across cache evictions.
 725   if (extension->is_ephemeral())
 726     return;
 727
 728   SetNotifierEnabled(notifier_id, true);
 729 #endif
 730 }
 731
 732 void DesktopNotificationService::FirePermissionLevelChangedEvent(
 733     const NotifierId& notifier_id, bool enabled) {
 734 #if defined(ENABLE_EXTENSIONS)
 735   DCHECK_EQ(NotifierId::APPLICATION, notifier_id.type);
 736   extensions::api::notifications::PermissionLevel permission =
 737       enabled ? extensions::api::notifications::PERMISSION_LEVEL_GRANTED
 738               : extensions::api::notifications::PERMISSION_LEVEL_DENIED;
 739   scoped_ptr<base::ListValue> args(new base::ListValue());
 740   args->Append(new base::StringValue(
 741       extensions::api::notifications::ToString(permission)));
 742   scoped_ptr<extensions::Event> event(new extensions::Event(
 743       extensions::api::notifications::OnPermissionLevelChanged::kEventName,
 744       args.Pass()));
 745   extensions::EventRouter::Get(profile_)
 746       ->DispatchEventToExtension(notifier_id.id, event.Pass());
 747
 748   // Tell the IO thread that this extension's permission for notifications
 749   // has changed.
 750   extensions::InfoMap* extension_info_map =
 751       extensions::ExtensionSystem::Get(profile_)->info_map();
 752   BrowserThread::PostTask(
 753       BrowserThread::IO, FROM_HERE,
 754       base::Bind(&extensions::InfoMap::SetNotificationsDisabled,
 755                  extension_info_map, notifier_id.id, !enabled));
 756 #endif
 757 }