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// Copyright (c) 2011 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 "chrome/browser/net/net_pref_observer.h"
#include "base/task.h"
#include "chrome/browser/net/predictor_api.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/prerender/prerender_manager.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/pref_names.h"
#include "content/browser/browser_thread.h"
#include "content/common/notification_type.h"
#include "content/common/notification_details.h"
#include "net/http/http_stream_factory.h"
#include "net/url_request/url_request_throttler_manager.h"
namespace {
// Function (for NewRunnableFunction) to call the set_enforce_throttling
// member on the URLRequestThrottlerManager singleton.
void SetEnforceThrottlingOnThrottlerManager(bool enforce) {
net::URLRequestThrottlerManager::GetInstance()->set_enforce_throttling(
enforce);
}
}
NetPrefObserver::NetPrefObserver(PrefService* prefs,
prerender::PrerenderManager* prerender_manager)
: prerender_manager_(prerender_manager) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
DCHECK(prefs);
network_prediction_enabled_.Init(prefs::kNetworkPredictionEnabled, prefs,
this);
spdy_disabled_.Init(prefs::kDisableSpdy, prefs, this);
http_throttling_enabled_.Init(prefs::kHttpThrottlingEnabled, prefs, this);
ApplySettings(NULL);
}
NetPrefObserver::~NetPrefObserver() {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
}
void NetPrefObserver::Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {
DCHECK_EQ(type.value, NotificationType::PREF_CHANGED);
std::string* pref_name = Details<std::string>(details).ptr();
ApplySettings(pref_name);
}
void NetPrefObserver::ApplySettings(const std::string* pref_name) {
DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
chrome_browser_net::EnablePredictor(*network_prediction_enabled_);
if (prerender_manager_)
prerender_manager_->set_enabled(*network_prediction_enabled_);
net::HttpStreamFactory::set_spdy_enabled(!*spdy_disabled_);
if (!pref_name || *pref_name == prefs::kHttpThrottlingEnabled) {
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
NewRunnableFunction(SetEnforceThrottlingOnThrottlerManager,
*http_throttling_enabled_));
}
}
// static
void NetPrefObserver::RegisterPrefs(PrefService* prefs) {
prefs->RegisterBooleanPref(prefs::kNetworkPredictionEnabled,
true,
PrefService::SYNCABLE_PREF);
prefs->RegisterBooleanPref(prefs::kDisableSpdy,
false,
PrefService::UNSYNCABLE_PREF);
prefs->RegisterBooleanPref(prefs::kHttpThrottlingEnabled,
false,
PrefService::UNSYNCABLE_PREF);
}
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