Migrate webkit/browser/ to storage/browser/

webkit/browser/quota/storage_monitor.cc

Index: webkit/browser/quota/storage_monitor.cc
diff --git a/webkit/browser/quota/storage_monitor.cc b/webkit/browser/quota/storage_monitor.cc
deleted file mode 100644
index 366d4d7b399bac9039fc35d833d80d13114b4332..0000000000000000000000000000000000000000
--- a/webkit/browser/quota/storage_monitor.cc
+++ /dev/null
@@ -1,379 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "webkit/browser/quota/storage_monitor.h"
-
-#include <algorithm>
-
-#include "base/stl_util.h"
-#include "net/base/net_util.h"
-#include "webkit/browser/quota/quota_manager.h"
-#include "webkit/common/quota/quota_status_code.h"
-
-namespace storage {
-
-// StorageObserverList:
-
-StorageObserverList::ObserverState::ObserverState()
-    : requires_update(false) {
-}
-
-StorageObserverList::StorageObserverList() {}
-
-StorageObserverList::~StorageObserverList() {}
-
-void StorageObserverList::AddObserver(
-    StorageObserver* observer, const StorageObserver::MonitorParams& params) {
-  ObserverState& observer_state = observers_[observer];
-  observer_state.origin = params.filter.origin;
-  observer_state.rate = params.rate;
-}
-
-void StorageObserverList::RemoveObserver(StorageObserver* observer) {
-  observers_.erase(observer);
-}
-
-int StorageObserverList::ObserverCount() const {
-  return observers_.size();
-}
-
-void StorageObserverList::OnStorageChange(const StorageObserver::Event& event) {
-  for (StorageObserverStateMap::iterator it = observers_.begin();
-       it != observers_.end(); ++it) {
-    it->second.requires_update = true;
-  }
-
-  MaybeDispatchEvent(event);
-}
-
-void StorageObserverList::MaybeDispatchEvent(
-    const StorageObserver::Event& event) {
-  notification_timer_.Stop();
-  base::TimeDelta min_delay = base::TimeDelta::Max();
-  bool all_observers_notified = true;
-
-  for (StorageObserverStateMap::iterator it = observers_.begin();
-       it != observers_.end(); ++it) {
-    if (!it->second.requires_update)
-      continue;
-
-    base::TimeTicks current_time = base::TimeTicks::Now();
-    base::TimeDelta delta = current_time - it->second.last_notification_time;
-    if (it->second.last_notification_time.is_null() ||
-        delta >= it->second.rate) {
-      it->second.requires_update = false;
-      it->second.last_notification_time = current_time;
-
-      if (it->second.origin == event.filter.origin) {
-        it->first->OnStorageEvent(event);
-      } else {
-        // When the quota and usage of an origin is requested, QuotaManager
-        // returns the quota and usage of the host. Multiple origins can map to
-        // to the same host, so ensure the |origin| field in the dispatched
-        // event matches the |origin| specified by the observer when it was
-        // registered.
-        StorageObserver::Event dispatch_event(event);
-        dispatch_event.filter.origin = it->second.origin;
-        it->first->OnStorageEvent(dispatch_event);
-      }
-    } else {
-      all_observers_notified = false;
-      base::TimeDelta delay = it->second.rate - delta;
-      if (delay < min_delay)
-        min_delay = delay;
-    }
-  }
-
-  // We need to respect the notification rate specified by observers. So if it
-  // is too soon to dispatch an event to an observer, save the event and
-  // dispatch it after a delay. If we simply drop the event, another one may
-  // not arrive anytime soon and the observer will miss the most recent event.
-  if (!all_observers_notified) {
-    pending_event_ = event;
-    notification_timer_.Start(
-        FROM_HERE,
-        min_delay,
-        this,
-        &StorageObserverList::DispatchPendingEvent);
-  }
-}
-
-void StorageObserverList::ScheduleUpdateForObserver(StorageObserver* observer) {
-  DCHECK(ContainsKey(observers_, observer));
-  observers_[observer].requires_update = true;
-}
-
-void StorageObserverList::DispatchPendingEvent() {
-  MaybeDispatchEvent(pending_event_);
-}
-
-
-// HostStorageObservers:
-
-HostStorageObservers::HostStorageObservers(QuotaManager* quota_manager)
-    : quota_manager_(quota_manager),
-      initialized_(false),
-      initializing_(false),
-      event_occurred_before_init_(false),
-      usage_deltas_during_init_(0),
-      cached_usage_(0),
-      cached_quota_(0),
-      weak_factory_(this) {
-}
-
-HostStorageObservers::~HostStorageObservers() {}
-
-void HostStorageObservers::AddObserver(
-    StorageObserver* observer,
-    const StorageObserver::MonitorParams& params) {
-  observers_.AddObserver(observer, params);
-
-  if (!params.dispatch_initial_state)
-    return;
-
-  if (initialized_) {
-    StorageObserver::Event event(params.filter,
-                                 std::max<int64>(cached_usage_, 0),
-                                 std::max<int64>(cached_quota_, 0));
-    observer->OnStorageEvent(event);
-    return;
-  }
-
-  // Ensure the observer receives the initial storage state once initialization
-  // is complete.
-  observers_.ScheduleUpdateForObserver(observer);
-  StartInitialization(params.filter);
-}
-
-void HostStorageObservers::RemoveObserver(StorageObserver* observer) {
-  observers_.RemoveObserver(observer);
-}
-
-bool HostStorageObservers::ContainsObservers() const {
-  return observers_.ObserverCount() > 0;
-}
-
-void HostStorageObservers::NotifyUsageChange(
-    const StorageObserver::Filter& filter, int64 delta) {
-  if (initialized_) {
-    cached_usage_ += delta;
-    DispatchEvent(filter, true);
-    return;
-  }
-
-  // If a storage change occurs before initialization, ensure all observers will
-  // receive an event once initialization is complete.
-  event_occurred_before_init_ = true;
-
-  // During QuotaManager::GetUsageAndQuotaForWebApps(), cached data is read
-  // synchronously, but other data may be retrieved asynchronously. A usage
-  // change may occur between the function call and callback. These deltas need
-  // to be added to the usage received by GotHostUsageAndQuota() to ensure
-  // |cached_usage_| is correctly initialized.
-  if (initializing_) {
-    usage_deltas_during_init_ += delta;
-    return;
-  }
-
-  StartInitialization(filter);
-}
-
-void HostStorageObservers::StartInitialization(
-    const StorageObserver::Filter& filter) {
-  if (initialized_ || initializing_)
-    return;
-
-  initializing_ = true;
-  quota_manager_->GetUsageAndQuotaForWebApps(
-      filter.origin,
-      filter.storage_type,
-      base::Bind(&HostStorageObservers::GotHostUsageAndQuota,
-                 weak_factory_.GetWeakPtr(),
-                 filter));
-}
-
-void HostStorageObservers::GotHostUsageAndQuota(
-    const StorageObserver::Filter& filter,
-    QuotaStatusCode status,
-    int64 usage,
-    int64 quota) {
-  initializing_ = false;
-  if (status != kQuotaStatusOk)
-    return;
-
-  initialized_ = true;
-  cached_quota_ = quota;
-  cached_usage_ = usage + usage_deltas_during_init_;
-  DispatchEvent(filter, event_occurred_before_init_);
-}
-
-void HostStorageObservers::DispatchEvent(
-    const StorageObserver::Filter& filter, bool is_update) {
-  StorageObserver::Event event(filter,
-                               std::max<int64>(cached_usage_, 0),
-                               std::max<int64>(cached_quota_, 0));
-  if (is_update)
-    observers_.OnStorageChange(event);
-  else
-    observers_.MaybeDispatchEvent(event);
-}
-
-
-// StorageTypeObservers:
-
-StorageTypeObservers::StorageTypeObservers(QuotaManager* quota_manager)
-    : quota_manager_(quota_manager) {
-}
-
-StorageTypeObservers::~StorageTypeObservers() {
-  STLDeleteValues(&host_observers_map_);
-}
-
-void StorageTypeObservers::AddObserver(
-    StorageObserver* observer, const StorageObserver::MonitorParams& params) {
-  std::string host = net::GetHostOrSpecFromURL(params.filter.origin);
-  if (host.empty())
-    return;
-
-  HostStorageObservers* host_observers = NULL;
-  HostObserversMap::iterator it = host_observers_map_.find(host);
-  if (it == host_observers_map_.end()) {
-    host_observers = new HostStorageObservers(quota_manager_);
-    host_observers_map_[host] = host_observers;
-  } else {
-    host_observers = it->second;
-  }
-
-  host_observers->AddObserver(observer, params);
-}
-
-void StorageTypeObservers::RemoveObserver(StorageObserver* observer) {
-  for (HostObserversMap::iterator it = host_observers_map_.begin();
-       it != host_observers_map_.end(); ) {
-    it->second->RemoveObserver(observer);
-    if (!it->second->ContainsObservers()) {
-      delete it->second;
-      host_observers_map_.erase(it++);
-    } else {
-      ++it;
-    }
-  }
-}
-
-void StorageTypeObservers::RemoveObserverForFilter(
-    StorageObserver* observer, const StorageObserver::Filter& filter) {
-  std::string host = net::GetHostOrSpecFromURL(filter.origin);
-  HostObserversMap::iterator it = host_observers_map_.find(host);
-  if (it == host_observers_map_.end())
-    return;
-
-  it->second->RemoveObserver(observer);
-  if (!it->second->ContainsObservers()) {
-    delete it->second;
-    host_observers_map_.erase(it);
-  }
-}
-
-const HostStorageObservers* StorageTypeObservers::GetHostObservers(
-    const std::string& host) const {
-  HostObserversMap::const_iterator it = host_observers_map_.find(host);
-  if (it != host_observers_map_.end())
-    return it->second;
-
-  return NULL;
-}
-
-void StorageTypeObservers::NotifyUsageChange(
-    const StorageObserver::Filter& filter, int64 delta) {
-  std::string host = net::GetHostOrSpecFromURL(filter.origin);
-  HostObserversMap::iterator it = host_observers_map_.find(host);
-  if (it == host_observers_map_.end())
-    return;
-
-  it->second->NotifyUsageChange(filter, delta);
-}
-
-
-// StorageMonitor:
-
-StorageMonitor::StorageMonitor(QuotaManager* quota_manager)
-    : quota_manager_(quota_manager) {
-}
-
-StorageMonitor::~StorageMonitor() {
-  STLDeleteValues(&storage_type_observers_map_);
-}
-
-void StorageMonitor::AddObserver(
-    StorageObserver* observer, const StorageObserver::MonitorParams& params) {
-  DCHECK(observer);
-
-  // Check preconditions.
-  if (params.filter.storage_type == kStorageTypeUnknown ||
-      params.filter.storage_type == kStorageTypeQuotaNotManaged ||
-      params.filter.origin.is_empty()) {
-    NOTREACHED();
-    return;
-  }
-
-  StorageTypeObservers* type_observers = NULL;
-  StorageTypeObserversMap::iterator it =
-      storage_type_observers_map_.find(params.filter.storage_type);
-  if (it == storage_type_observers_map_.end()) {
-    type_observers = new StorageTypeObservers(quota_manager_);
-    storage_type_observers_map_[params.filter.storage_type] = type_observers;
-  } else {
-    type_observers = it->second;
-  }
-
-  type_observers->AddObserver(observer, params);
-}
-
-void StorageMonitor::RemoveObserver(StorageObserver* observer) {
-  for (StorageTypeObserversMap::iterator it =
-           storage_type_observers_map_.begin();
-       it != storage_type_observers_map_.end(); ++it) {
-    it->second->RemoveObserver(observer);
-  }
-}
-
-void StorageMonitor::RemoveObserverForFilter(
-    StorageObserver* observer, const StorageObserver::Filter& filter) {
-  StorageTypeObserversMap::iterator it =
-      storage_type_observers_map_.find(filter.storage_type);
-  if (it == storage_type_observers_map_.end())
-    return;
-
-  it->second->RemoveObserverForFilter(observer, filter);
-}
-
-const StorageTypeObservers* StorageMonitor::GetStorageTypeObservers(
-    StorageType storage_type) const {
-  StorageTypeObserversMap::const_iterator it =
-      storage_type_observers_map_.find(storage_type);
-  if (it != storage_type_observers_map_.end())
-    return it->second;
-
-  return NULL;
-}
-
-void StorageMonitor::NotifyUsageChange(
-    const StorageObserver::Filter& filter, int64 delta) {
-  // Check preconditions.
-  if (filter.storage_type == kStorageTypeUnknown ||
-      filter.storage_type == kStorageTypeQuotaNotManaged ||
-      filter.origin.is_empty()) {
-    NOTREACHED();
-    return;
-  }
-
-  StorageTypeObserversMap::iterator it =
-      storage_type_observers_map_.find(filter.storage_type);
-  if (it == storage_type_observers_map_.end())
-    return;
-
-  it->second->NotifyUsageChange(filter, delta);
-}
-
-}  // namespace storage