ui/message_center/message_center_impl.cc

   1 // Copyright (c) 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 "ui/message_center/message_center_impl.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/memory/scoped_vector.h"
  10 #include "base/observer_list.h"
  11 #include "ui/message_center/message_center_style.h"
  12 #include "ui/message_center/message_center_types.h"
  13 #include "ui/message_center/notification.h"
  14 #include "ui/message_center/notification_blocker.h"
  15 #include "ui/message_center/notification_list.h"
  16 #include "ui/message_center/notification_types.h"
  17
  18 namespace {
  19
  20 base::TimeDelta GetTimeoutForPriority(int priority) {
  21   if (priority > message_center::DEFAULT_PRIORITY) {
  22     return base::TimeDelta::FromSeconds(
  23         message_center::kAutocloseHighPriorityDelaySeconds);
  24   }
  25   return base::TimeDelta::FromSeconds(
  26       message_center::kAutocloseDefaultDelaySeconds);
  27 }
  28
  29 }  // namespace
  30
  31 namespace message_center {
  32 namespace internal {
  33
  34 // ChangeQueue keeps track of all the changes that we need to make to the
  35 // notification list once the visibility is set to VISIBILITY_TRANSIENT.
  36 class ChangeQueue {
  37  public:
  38   enum ChangeType {
  39     CHANGE_TYPE_ADD = 0,
  40     CHANGE_TYPE_UPDATE,
  41     CHANGE_TYPE_DELETE
  42   };
  43
  44   // Change represents an operation made on a notification.  Since it contains
  45   // the final state of the notification, we only keep the last change for a
  46   // particular notification that is in the notification list around.  There are
  47   // two ids; |id_| is the newest notification id that has been assigned by an
  48   // update, and |notification_list_id_| is the id of the notification it should
  49   // be updating as it exists in the notification list.
  50   class Change {
  51    public:
  52     Change(ChangeType type,
  53            const std::string& id,
  54            scoped_ptr<Notification> notification);
  55     ~Change();
  56
  57     // Used to transfer ownership of the contained notification.
  58     scoped_ptr<Notification> PassNotification();
  59
  60     Notification* notification() const { return notification_.get(); }
  61     const std::string& id() const { return id_; }
  62     ChangeType type() const { return type_; }
  63     bool by_user() const { return by_user_; }
  64     void set_by_user(bool by_user) { by_user_ = by_user; }
  65     const std::string& notification_list_id() const {
  66       return notification_list_id_;
  67     }
  68     void set_notification_list_id(const std::string& id) {
  69       notification_list_id_ = id;
  70     }
  71
  72    private:
  73     const ChangeType type_;
  74     const std::string id_;
  75     std::string notification_list_id_;
  76     bool by_user_;
  77     scoped_ptr<Notification> notification_;
  78
  79     DISALLOW_COPY_AND_ASSIGN(Change);
  80   };
  81
  82   ChangeQueue();
  83   ~ChangeQueue();
  84
  85   // Called when the message center has appropriate visibility.  Modifies
  86   // |message_center| but does not retain it.  This also causes the queue to
  87   // empty itself.
  88   void ApplyChanges(MessageCenter* message_center);
  89
  90   // Causes a TYPE_ADD change to be added to the queue.
  91   void AddNotification(scoped_ptr<Notification> notification);
  92
  93   // Causes a TYPE_UPDATE change to be added to the queue.
  94   void UpdateNotification(const std::string& old_id,
  95                           scoped_ptr<Notification> notification);
  96
  97   // Causes a TYPE_DELETE change to be added to the queue.
  98   void EraseNotification(const std::string& id, bool by_user);
  99
 100   // Returns whether the queue matches an id.  The id given will be matched
 101   // against the ID of all changes post-update, not the id of the notification
 102   // as it stands in the notification list.
 103   bool Has(const std::string& id) const;
 104
 105   // Returns a Change that can be modified by the caller.  ChangeQueue retains
 106   // ownership of the Change; pointers should not be retained.
 107   Notification* GetLatestNotification(const std::string& id) const;
 108
 109  private:
 110   void Replace(const std::string& id, scoped_ptr<Change> change);
 111
 112   ScopedVector<Change> changes_;
 113 };
 114
 115 ////////////////////////////////////////////////////////////////////////////////
 116 // ChangeFinder
 117
 118 struct ChangeFinder {
 119   explicit ChangeFinder(const std::string& id) : id(id) {}
 120   bool operator()(ChangeQueue::Change* change) { return change->id() == id; }
 121
 122   std::string id;
 123 };
 124
 125 ////////////////////////////////////////////////////////////////////////////////
 126 // ChangeQueue::Change
 127
 128 ChangeQueue::Change::Change(ChangeType type,
 129                             const std::string& id,
 130                             scoped_ptr<Notification> notification)
 131     : type_(type),
 132       id_(id),
 133       notification_list_id_(id),
 134       by_user_(false),
 135       notification_(notification.Pass()) {
 136   DCHECK(!id.empty() &&
 137          (type != CHANGE_TYPE_DELETE || notification_.get() == NULL));
 138 }
 139
 140 ChangeQueue::Change::~Change() {}
 141
 142 scoped_ptr<Notification> ChangeQueue::Change::PassNotification() {
 143   return notification_.Pass();
 144 }
 145
 146 ////////////////////////////////////////////////////////////////////////////////
 147 // ChangeQueue
 148
 149 ChangeQueue::ChangeQueue() {}
 150
 151 ChangeQueue::~ChangeQueue() {}
 152
 153 void ChangeQueue::ApplyChanges(MessageCenter* message_center) {
 154   // This method is re-entrant.
 155   while (!changes_.empty()) {
 156     ScopedVector<Change>::iterator iter = changes_.begin();
 157     scoped_ptr<Change> change(*iter);
 158     // TODO(dewittj): Replace changes_ with a deque.
 159     changes_.weak_erase(iter);
 160     // |message_center| is taking ownership of each element here.
 161     switch (change->type()) {
 162       case CHANGE_TYPE_ADD:
 163         message_center->AddNotification(change->PassNotification());
 164         break;
 165       case CHANGE_TYPE_UPDATE:
 166         message_center->UpdateNotification(change->notification_list_id(),
 167                                            change->PassNotification());
 168         break;
 169       case CHANGE_TYPE_DELETE:
 170         message_center->RemoveNotification(change->notification_list_id(),
 171                                            change->by_user());
 172         break;
 173       default:
 174         NOTREACHED();
 175     }
 176   }
 177 }
 178
 179 void ChangeQueue::AddNotification(scoped_ptr<Notification> notification) {
 180   std::string id = notification->id();
 181   scoped_ptr<Change> change(
 182       new Change(CHANGE_TYPE_ADD, id, notification.Pass()));
 183   Replace(id, change.Pass());
 184 }
 185
 186 void ChangeQueue::UpdateNotification(const std::string& old_id,
 187                                      scoped_ptr<Notification> notification) {
 188   std::string new_id = notification->id();
 189   scoped_ptr<Change> change(
 190       new Change(CHANGE_TYPE_UPDATE, new_id, notification.Pass()));
 191   Replace(old_id, change.Pass());
 192 }
 193
 194 void ChangeQueue::EraseNotification(const std::string& id, bool by_user) {
 195   scoped_ptr<Change> change(
 196       new Change(CHANGE_TYPE_DELETE, id, scoped_ptr<Notification>()));
 197   change->set_by_user(by_user);
 198   Replace(id, change.Pass());
 199 }
 200
 201 bool ChangeQueue::Has(const std::string& id) const {
 202   ScopedVector<Change>::const_iterator iter =
 203       std::find_if(changes_.begin(), changes_.end(), ChangeFinder(id));
 204   return iter != changes_.end();
 205 }
 206
 207 Notification* ChangeQueue::GetLatestNotification(const std::string& id) const {
 208   ScopedVector<Change>::const_iterator iter =
 209       std::find_if(changes_.begin(), changes_.end(), ChangeFinder(id));
 210   if (iter == changes_.end())
 211     return NULL;
 212
 213   return (*iter)->notification();
 214 }
 215
 216 void ChangeQueue::Replace(const std::string& changed_id,
 217                           scoped_ptr<Change> new_change) {
 218   ScopedVector<Change>::iterator iter =
 219       std::find_if(changes_.begin(), changes_.end(), ChangeFinder(changed_id));
 220   if (iter != changes_.end()) {
 221     Change* old_change = *iter;
 222     new_change->set_notification_list_id(old_change->notification_list_id());
 223     changes_.erase(iter);
 224   } else {
 225     new_change->set_notification_list_id(changed_id);
 226   }
 227
 228   changes_.push_back(new_change.release());
 229 }
 230
 231 ////////////////////////////////////////////////////////////////////////////////
 232 // PopupTimer
 233
 234 PopupTimer::PopupTimer(const std::string& id,
 235                        base::TimeDelta timeout,
 236                        base::WeakPtr<PopupTimersController> controller)
 237     : id_(id),
 238       timeout_(timeout),
 239       timer_controller_(controller),
 240       timer_(new base::OneShotTimer<PopupTimersController>) {}
 241
 242 PopupTimer::~PopupTimer() {
 243   if (!timer_)
 244     return;
 245
 246   if (timer_->IsRunning())
 247     timer_->Stop();
 248 }
 249
 250 void PopupTimer::Start() {
 251   if (timer_->IsRunning())
 252     return;
 253   base::TimeDelta timeout_to_close =
 254       timeout_ <= passed_ ? base::TimeDelta() : timeout_ - passed_;
 255   start_time_ = base::Time::Now();
 256   timer_->Start(
 257       FROM_HERE,
 258       timeout_to_close,
 259       base::Bind(
 260           &PopupTimersController::TimerFinished, timer_controller_, id_));
 261 }
 262
 263 void PopupTimer::Pause() {
 264   if (!timer_.get() || !timer_->IsRunning())
 265     return;
 266
 267   timer_->Stop();
 268   passed_ += base::Time::Now() - start_time_;
 269 }
 270
 271 void PopupTimer::Reset() {
 272   if (timer_)
 273     timer_->Stop();
 274   passed_ = base::TimeDelta();
 275 }
 276
 277 ////////////////////////////////////////////////////////////////////////////////
 278 // PopupTimersController
 279
 280 PopupTimersController::PopupTimersController(MessageCenter* message_center)
 281     : message_center_(message_center), popup_deleter_(&popup_timers_) {
 282   message_center_->AddObserver(this);
 283 }
 284
 285 PopupTimersController::~PopupTimersController() {
 286   message_center_->RemoveObserver(this);
 287 }
 288
 289 void PopupTimersController::StartTimer(const std::string& id,
 290                                        const base::TimeDelta& timeout) {
 291   PopupTimerCollection::iterator iter = popup_timers_.find(id);
 292   if (iter != popup_timers_.end()) {
 293     DCHECK(iter->second);
 294     iter->second->Start();
 295     return;
 296   }
 297
 298   PopupTimer* timer = new PopupTimer(id, timeout, AsWeakPtr());
 299
 300   timer->Start();
 301   popup_timers_[id] = timer;
 302 }
 303
 304 void PopupTimersController::StartAll() {
 305   std::map<std::string, PopupTimer*>::iterator iter;
 306   for (iter = popup_timers_.begin(); iter != popup_timers_.end(); iter++) {
 307     iter->second->Start();
 308   }
 309 }
 310
 311 void PopupTimersController::ResetTimer(const std::string& id,
 312                                        const base::TimeDelta& timeout) {
 313   CancelTimer(id);
 314   StartTimer(id, timeout);
 315 }
 316
 317 void PopupTimersController::PauseTimer(const std::string& id) {
 318   PopupTimerCollection::iterator iter = popup_timers_.find(id);
 319   if (iter == popup_timers_.end())
 320     return;
 321   iter->second->Pause();
 322 }
 323
 324 void PopupTimersController::PauseAll() {
 325   std::map<std::string, PopupTimer*>::iterator iter;
 326   for (iter = popup_timers_.begin(); iter != popup_timers_.end(); iter++) {
 327     iter->second->Pause();
 328   }
 329 }
 330
 331 void PopupTimersController::CancelTimer(const std::string& id) {
 332   PopupTimerCollection::iterator iter = popup_timers_.find(id);
 333   if (iter == popup_timers_.end())
 334     return;
 335
 336   PopupTimer* timer = iter->second;
 337   delete timer;
 338
 339   popup_timers_.erase(iter);
 340 }
 341
 342 void PopupTimersController::CancelAll() {
 343   STLDeleteValues(&popup_timers_);
 344   popup_timers_.clear();
 345 }
 346
 347 void PopupTimersController::TimerFinished(const std::string& id) {
 348   PopupTimerCollection::iterator iter = popup_timers_.find(id);
 349   if (iter == popup_timers_.end())
 350     return;
 351
 352   CancelTimer(id);
 353   message_center_->MarkSinglePopupAsShown(id, false);
 354 }
 355
 356 void PopupTimersController::OnNotificationDisplayed(const std::string& id) {
 357   OnNotificationUpdated(id);
 358 }
 359
 360 void PopupTimersController::OnNotificationUpdated(const std::string& id) {
 361   NotificationList::PopupNotifications popup_notifications =
 362       message_center_->GetPopupNotifications();
 363
 364   if (!popup_notifications.size()) {
 365     CancelAll();
 366     return;
 367   }
 368
 369   NotificationList::PopupNotifications::const_iterator iter =
 370       popup_notifications.begin();
 371   for (; iter != popup_notifications.end(); iter++) {
 372     if ((*iter)->id() == id)
 373       break;
 374   }
 375
 376   if (iter == popup_notifications.end() || (*iter)->never_timeout()) {
 377     CancelTimer(id);
 378     return;
 379   }
 380
 381   // Start the timer if not yet.
 382   if (popup_timers_.find(id) == popup_timers_.end())
 383     StartTimer(id, GetTimeoutForPriority((*iter)->priority()));
 384 }
 385
 386 void PopupTimersController::OnNotificationRemoved(const std::string& id,
 387                                                   bool by_user) {
 388   CancelTimer(id);
 389 }
 390
 391 }  // namespace internal
 392
 393 ////////////////////////////////////////////////////////////////////////////////
 394 // MessageCenterImpl::NotificationCache
 395
 396 MessageCenterImpl::NotificationCache::NotificationCache()
 397     : unread_count(0) {}
 398
 399 MessageCenterImpl::NotificationCache::~NotificationCache() {}
 400
 401 void MessageCenterImpl::NotificationCache::Rebuild(
 402     const NotificationList::Notifications& notifications) {
 403   visible_notifications = notifications;
 404   RecountUnread();
 405 }
 406
 407 void MessageCenterImpl::NotificationCache::RecountUnread() {
 408   unread_count = 0;
 409   for (NotificationList::Notifications::const_iterator iter =
 410            visible_notifications.begin();
 411        iter != visible_notifications.end(); ++iter) {
 412     if (!(*iter)->IsRead())
 413       ++unread_count;
 414   }
 415 }
 416
 417 ////////////////////////////////////////////////////////////////////////////////
 418 // MessageCenterImpl
 419
 420 MessageCenterImpl::MessageCenterImpl()
 421     : MessageCenter(),
 422       popup_timers_controller_(new internal::PopupTimersController(this)),
 423       settings_provider_(NULL) {
 424   notification_list_.reset(new NotificationList());
 425   notification_queue_.reset(new internal::ChangeQueue());
 426 }
 427
 428 MessageCenterImpl::~MessageCenterImpl() {}
 429
 430 void MessageCenterImpl::AddObserver(MessageCenterObserver* observer) {
 431   observer_list_.AddObserver(observer);
 432 }
 433
 434 void MessageCenterImpl::RemoveObserver(MessageCenterObserver* observer) {
 435   observer_list_.RemoveObserver(observer);
 436 }
 437
 438 void MessageCenterImpl::AddNotificationBlocker(NotificationBlocker* blocker) {
 439   if (std::find(blockers_.begin(), blockers_.end(), blocker) !=
 440       blockers_.end()) {
 441     return;
 442   }
 443   blocker->AddObserver(this);
 444   blockers_.push_back(blocker);
 445 }
 446
 447 void MessageCenterImpl::RemoveNotificationBlocker(
 448     NotificationBlocker* blocker) {
 449   std::vector<NotificationBlocker*>::iterator iter =
 450       std::find(blockers_.begin(), blockers_.end(), blocker);
 451   if (iter == blockers_.end())
 452     return;
 453   blocker->RemoveObserver(this);
 454   blockers_.erase(iter);
 455 }
 456
 457 void MessageCenterImpl::OnBlockingStateChanged(NotificationBlocker* blocker) {
 458   std::list<std::string> blocked_ids;
 459   NotificationList::PopupNotifications popups =
 460       notification_list_->GetPopupNotifications(blockers_, &blocked_ids);
 461
 462   for (std::list<std::string>::const_iterator iter = blocked_ids.begin();
 463        iter != blocked_ids.end(); ++iter) {
 464     // Do not call MessageCenterImpl::MarkSinglePopupAsShown() directly here
 465     // just for performance reason. MessageCenterImpl::MarkSinglePopupAsShown()
 466     // calls NotificationList::MarkSinglePopupAsShown() and then updates the
 467     // unread count, but the whole cache will be recreated below.
 468     notification_list_->MarkSinglePopupAsShown((*iter), true);
 469     FOR_EACH_OBSERVER(MessageCenterObserver,
 470                       observer_list_,
 471                       OnNotificationUpdated(*iter));
 472   }
 473   notification_cache_.Rebuild(
 474       notification_list_->GetVisibleNotifications(blockers_));
 475   FOR_EACH_OBSERVER(MessageCenterObserver,
 476                     observer_list_,
 477                     OnBlockingStateChanged(blocker));
 478 }
 479
 480 void MessageCenterImpl::SetVisibility(Visibility visibility) {
 481   std::set<std::string> updated_ids;
 482   notification_list_->SetMessageCenterVisible(
 483       (visibility == VISIBILITY_MESSAGE_CENTER), &updated_ids);
 484   notification_cache_.RecountUnread();
 485
 486   for (std::set<std::string>::const_iterator iter = updated_ids.begin();
 487        iter != updated_ids.end();
 488        ++iter) {
 489     FOR_EACH_OBSERVER(
 490         MessageCenterObserver, observer_list_, OnNotificationUpdated(*iter));
 491   }
 492
 493   if (visibility == VISIBILITY_TRANSIENT)
 494     notification_queue_->ApplyChanges(this);
 495
 496   FOR_EACH_OBSERVER(MessageCenterObserver,
 497                     observer_list_,
 498                     OnCenterVisibilityChanged(visibility));
 499 }
 500
 501 bool MessageCenterImpl::IsMessageCenterVisible() const {
 502   return notification_list_->is_message_center_visible();
 503 }
 504
 505 size_t MessageCenterImpl::NotificationCount() const {
 506   return notification_cache_.visible_notifications.size();
 507 }
 508
 509 size_t MessageCenterImpl::UnreadNotificationCount() const {
 510   return notification_cache_.unread_count;
 511 }
 512
 513 bool MessageCenterImpl::HasPopupNotifications() const {
 514   return !IsMessageCenterVisible() &&
 515       notification_list_->HasPopupNotifications(blockers_);
 516 }
 517
 518 bool MessageCenterImpl::HasNotification(const std::string& id) {
 519   // This will return true if the notification with |id| is hidden by the
 520   // ChromeOS multi-profile feature. This would be harmless for now because
 521   // this check will be used from the UI, so the |id| for hidden profile won't
 522   // arrive here.
 523   // TODO(mukai): fix this if necessary.
 524   return notification_list_->HasNotification(id);
 525 }
 526
 527 bool MessageCenterImpl::IsQuietMode() const {
 528   return notification_list_->quiet_mode();
 529 }
 530
 531 bool MessageCenterImpl::HasClickedListener(const std::string& id) {
 532   NotificationDelegate* delegate =
 533       notification_list_->GetNotificationDelegate(id);
 534   return delegate && delegate->HasClickedListener();
 535 }
 536
 537 const NotificationList::Notifications&
 538 MessageCenterImpl::GetVisibleNotifications() {
 539   return notification_cache_.visible_notifications;
 540 }
 541
 542 NotificationList::PopupNotifications
 543     MessageCenterImpl::GetPopupNotifications() {
 544   return notification_list_->GetPopupNotifications(blockers_, NULL);
 545 }
 546
 547 //------------------------------------------------------------------------------
 548 // Client code interface.
 549 void MessageCenterImpl::AddNotification(scoped_ptr<Notification> notification) {
 550   DCHECK(notification.get());
 551
 552   for (size_t i = 0; i < blockers_.size(); ++i)
 553     blockers_[i]->CheckState();
 554
 555   if (notification_list_->is_message_center_visible()) {
 556     notification_queue_->AddNotification(notification.Pass());
 557     return;
 558   }
 559
 560   // Sometimes the notification can be added with the same id and the
 561   // |notification_list| will replace the notification instead of adding new.
 562   // This is essentially an update rather than addition.
 563   const std::string& id = notification->id();
 564   bool already_exists = notification_list_->HasNotification(id);
 565   notification_list_->AddNotification(notification.Pass());
 566   notification_cache_.Rebuild(
 567       notification_list_->GetVisibleNotifications(blockers_));
 568
 569   if (already_exists) {
 570     FOR_EACH_OBSERVER(
 571         MessageCenterObserver, observer_list_, OnNotificationUpdated(id));
 572   } else {
 573     FOR_EACH_OBSERVER(
 574         MessageCenterObserver, observer_list_, OnNotificationAdded(id));
 575   }
 576 }
 577
 578 void MessageCenterImpl::UpdateNotification(
 579     const std::string& old_id,
 580     scoped_ptr<Notification> new_notification) {
 581   for (size_t i = 0; i < blockers_.size(); ++i)
 582     blockers_[i]->CheckState();
 583
 584   if (notification_list_->is_message_center_visible()) {
 585     // We will allow notifications that are progress types (and stay progress
 586     // types) to be updated even if the message center is open.  There are 3
 587     // requirements here:
 588     //  * Notification of type PROGRESS exists with same ID in the center
 589     //  * There are no queued updates for this notification (they imply a change
 590     //    that violates the PROGRESS invariant
 591     //  * The new notification is type PROGRESS.
 592     // TODO(dewittj): Ensure this works when the ID is changed by the caller.
 593     // This shouldn't be an issue in practice since only W3C notifications
 594     // change the ID on update, and they don't have progress type notifications.
 595     bool update_keeps_progress_type =
 596         new_notification->type() == NOTIFICATION_TYPE_PROGRESS &&
 597         !notification_queue_->Has(old_id) &&
 598         notification_list_->HasNotificationOfType(old_id,
 599                                                   NOTIFICATION_TYPE_PROGRESS);
 600     if (!update_keeps_progress_type) {
 601       // Updates are allowed only for progress notifications.
 602       notification_queue_->UpdateNotification(old_id, new_notification.Pass());
 603       return;
 604     }
 605   }
 606
 607   std::string new_id = new_notification->id();
 608   notification_list_->UpdateNotificationMessage(old_id,
 609                                                 new_notification.Pass());
 610   notification_cache_.Rebuild(
 611      notification_list_->GetVisibleNotifications(blockers_));
 612   if (old_id == new_id) {
 613     FOR_EACH_OBSERVER(
 614         MessageCenterObserver, observer_list_, OnNotificationUpdated(new_id));
 615   } else {
 616     FOR_EACH_OBSERVER(MessageCenterObserver, observer_list_,
 617                       OnNotificationRemoved(old_id, false));
 618     FOR_EACH_OBSERVER(MessageCenterObserver, observer_list_,
 619                       OnNotificationAdded(new_id));
 620   }
 621 }
 622
 623 void MessageCenterImpl::RemoveNotification(const std::string& id,
 624                                            bool by_user) {
 625   if (!by_user && notification_list_->is_message_center_visible()) {
 626     notification_queue_->EraseNotification(id, by_user);
 627     return;
 628   }
 629
 630   if (!HasNotification(id))
 631     return;
 632
 633   NotificationDelegate* delegate =
 634       notification_list_->GetNotificationDelegate(id);
 635   if (delegate)
 636     delegate->Close(by_user);
 637
 638   // In many cases |id| is a reference to an existing notification instance
 639   // but the instance can be destructed in RemoveNotification(). Hence
 640   // copies the id explicitly here.
 641   std::string copied_id(id);
 642   notification_list_->RemoveNotification(copied_id);
 643   notification_cache_.Rebuild(
 644       notification_list_->GetVisibleNotifications(blockers_));
 645   FOR_EACH_OBSERVER(MessageCenterObserver,
 646                     observer_list_,
 647                     OnNotificationRemoved(copied_id, by_user));
 648 }
 649
 650 void MessageCenterImpl::RemoveAllNotifications(bool by_user) {
 651   // Using not |blockers_| but an empty list since it wants to remove literally
 652   // all notifications.
 653   RemoveNotifications(by_user, NotificationBlockers());
 654 }
 655
 656 void MessageCenterImpl::RemoveAllVisibleNotifications(bool by_user) {
 657   RemoveNotifications(by_user, blockers_);
 658 }
 659
 660 void MessageCenterImpl::RemoveNotifications(
 661     bool by_user,
 662     const NotificationBlockers& blockers) {
 663   const NotificationList::Notifications notifications =
 664       notification_list_->GetVisibleNotifications(blockers);
 665   std::set<std::string> ids;
 666   for (NotificationList::Notifications::const_iterator iter =
 667            notifications.begin(); iter != notifications.end(); ++iter) {
 668     ids.insert((*iter)->id());
 669     NotificationDelegate* delegate = (*iter)->delegate();
 670     if (delegate)
 671       delegate->Close(by_user);
 672     notification_list_->RemoveNotification((*iter)->id());
 673   }
 674
 675   if (!ids.empty()) {
 676     notification_cache_.Rebuild(
 677         notification_list_->GetVisibleNotifications(blockers_));
 678   }
 679   for (std::set<std::string>::const_iterator iter = ids.begin();
 680        iter != ids.end(); ++iter) {
 681     FOR_EACH_OBSERVER(MessageCenterObserver,
 682                       observer_list_,
 683                       OnNotificationRemoved(*iter, by_user));
 684   }
 685 }
 686
 687 void MessageCenterImpl::SetNotificationIcon(const std::string& notification_id,
 688                                         const gfx::Image& image) {
 689   bool updated = false;
 690   Notification* queue_notification = notification_queue_->GetLatestNotification(
 691       notification_id);
 692
 693   if (queue_notification) {
 694     queue_notification->set_icon(image);
 695     updated = true;
 696   } else {
 697     updated = notification_list_->SetNotificationIcon(notification_id, image);
 698   }
 699
 700   if (updated) {
 701     FOR_EACH_OBSERVER(MessageCenterObserver, observer_list_,
 702                       OnNotificationUpdated(notification_id));
 703   }
 704 }
 705
 706 void MessageCenterImpl::SetNotificationImage(const std::string& notification_id,
 707                                          const gfx::Image& image) {
 708   bool updated = false;
 709   Notification* queue_notification = notification_queue_->GetLatestNotification(
 710       notification_id);
 711
 712   if (queue_notification) {
 713     queue_notification->set_image(image);
 714     updated = true;
 715   } else {
 716     updated = notification_list_->SetNotificationImage(notification_id, image);
 717   }
 718
 719   if (updated) {
 720     FOR_EACH_OBSERVER(MessageCenterObserver, observer_list_,
 721                       OnNotificationUpdated(notification_id));
 722   }
 723 }
 724
 725 void MessageCenterImpl::SetNotificationButtonIcon(
 726     const std::string& notification_id, int button_index,
 727     const gfx::Image& image) {
 728   bool updated = false;
 729   Notification* queue_notification = notification_queue_->GetLatestNotification(
 730       notification_id);
 731
 732   if (queue_notification) {
 733     queue_notification->SetButtonIcon(button_index, image);
 734     updated = true;
 735   } else {
 736     updated = notification_list_->SetNotificationButtonIcon(
 737         notification_id, button_index, image);
 738   }
 739
 740   if (updated) {
 741     FOR_EACH_OBSERVER(MessageCenterObserver, observer_list_,
 742                       OnNotificationUpdated(notification_id));
 743   }
 744 }
 745
 746 void MessageCenterImpl::DisableNotificationsByNotifier(
 747     const NotifierId& notifier_id) {
 748   if (settings_provider_) {
 749     // TODO(mukai): SetNotifierEnabled can just accept notifier_id?
 750     Notifier notifier(notifier_id, base::string16(), true);
 751     settings_provider_->SetNotifierEnabled(notifier, false);
 752   }
 753
 754   NotificationList::Notifications notifications =
 755       notification_list_->GetNotificationsByNotifierId(notifier_id);
 756   for (NotificationList::Notifications::const_iterator iter =
 757            notifications.begin(); iter != notifications.end();) {
 758     std::string id = (*iter)->id();
 759     iter++;
 760     RemoveNotification(id, false);
 761   }
 762   if (!notifications.empty()) {
 763     notification_cache_.Rebuild(
 764         notification_list_->GetVisibleNotifications(blockers_));
 765   }
 766 }
 767
 768 void MessageCenterImpl::ExpandNotification(const std::string& id) {
 769   if (!HasNotification(id))
 770     return;
 771   notification_list_->MarkNotificationAsExpanded(id);
 772   FOR_EACH_OBSERVER(MessageCenterObserver, observer_list_,
 773                     OnNotificationUpdated(id));
 774 }
 775
 776 void MessageCenterImpl::ClickOnNotification(const std::string& id) {
 777   if (!HasNotification(id))
 778     return;
 779   if (HasPopupNotifications())
 780     MarkSinglePopupAsShown(id, true);
 781   NotificationDelegate* delegate =
 782       notification_list_->GetNotificationDelegate(id);
 783   if (delegate)
 784     delegate->Click();
 785   FOR_EACH_OBSERVER(
 786       MessageCenterObserver, observer_list_, OnNotificationClicked(id));
 787 }
 788
 789 void MessageCenterImpl::ClickOnNotificationButton(const std::string& id,
 790                                               int button_index) {
 791   if (!HasNotification(id))
 792     return;
 793   if (HasPopupNotifications())
 794     MarkSinglePopupAsShown(id, true);
 795   NotificationDelegate* delegate =
 796       notification_list_->GetNotificationDelegate(id);
 797   if (delegate)
 798     delegate->ButtonClick(button_index);
 799   FOR_EACH_OBSERVER(
 800       MessageCenterObserver, observer_list_, OnNotificationButtonClicked(
 801           id, button_index));
 802 }
 803
 804 void MessageCenterImpl::MarkSinglePopupAsShown(const std::string& id,
 805                                                bool mark_notification_as_read) {
 806   if (!HasNotification(id))
 807     return;
 808   notification_list_->MarkSinglePopupAsShown(id, mark_notification_as_read);
 809   notification_cache_.RecountUnread();
 810   FOR_EACH_OBSERVER(
 811       MessageCenterObserver, observer_list_, OnNotificationUpdated(id));
 812 }
 813
 814 void MessageCenterImpl::DisplayedNotification(const std::string& id) {
 815   if (!HasNotification(id))
 816     return;
 817
 818   if (HasPopupNotifications())
 819     notification_list_->MarkSinglePopupAsDisplayed(id);
 820   notification_cache_.RecountUnread();
 821   NotificationDelegate* delegate =
 822       notification_list_->GetNotificationDelegate(id);
 823   if (delegate)
 824     delegate->Display();
 825   FOR_EACH_OBSERVER(
 826       MessageCenterObserver, observer_list_, OnNotificationDisplayed(id));
 827 }
 828
 829 void MessageCenterImpl::SetNotifierSettingsProvider(
 830     NotifierSettingsProvider* provider) {
 831   settings_provider_ = provider;
 832 }
 833
 834 NotifierSettingsProvider* MessageCenterImpl::GetNotifierSettingsProvider() {
 835   return settings_provider_;
 836 }
 837
 838 void MessageCenterImpl::SetQuietMode(bool in_quiet_mode) {
 839   if (in_quiet_mode != notification_list_->quiet_mode()) {
 840     notification_list_->SetQuietMode(in_quiet_mode);
 841     FOR_EACH_OBSERVER(MessageCenterObserver,
 842                       observer_list_,
 843                       OnQuietModeChanged(in_quiet_mode));
 844   }
 845   quiet_mode_timer_.reset();
 846 }
 847
 848 void MessageCenterImpl::EnterQuietModeWithExpire(
 849     const base::TimeDelta& expires_in) {
 850   if (quiet_mode_timer_.get()) {
 851     // Note that the capital Reset() is the method to restart the timer, not
 852     // scoped_ptr::reset().
 853     quiet_mode_timer_->Reset();
 854   } else {
 855     notification_list_->SetQuietMode(true);
 856     FOR_EACH_OBSERVER(
 857         MessageCenterObserver, observer_list_, OnQuietModeChanged(true));
 858
 859     quiet_mode_timer_.reset(new base::OneShotTimer<MessageCenterImpl>);
 860     quiet_mode_timer_->Start(
 861         FROM_HERE,
 862         expires_in,
 863         base::Bind(
 864             &MessageCenterImpl::SetQuietMode, base::Unretained(this), false));
 865   }
 866 }
 867
 868 void MessageCenterImpl::RestartPopupTimers() {
 869   if (popup_timers_controller_.get())
 870     popup_timers_controller_->StartAll();
 871 }
 872
 873 void MessageCenterImpl::PausePopupTimers() {
 874   if (popup_timers_controller_.get())
 875     popup_timers_controller_->PauseAll();
 876 }
 877
 878 void MessageCenterImpl::DisableTimersForTest() {
 879   popup_timers_controller_.reset();
 880 }
 881
 882 }  // namespace message_center