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// Copyright 2013 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/network_time/navigation_time_helper.h"
#include "chrome/browser/network_time/network_time_service.h"
#include "chrome/browser/network_time/network_time_service_factory.h"
#include "content/public/browser/navigation_entry.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/notification_types.h"
DEFINE_WEB_CONTENTS_USER_DATA_KEY(NavigationTimeHelper);
NavigationTimeHelper::NavigationTimeHelper()
: web_contents_(NULL) {}
NavigationTimeHelper::NavigationTimeHelper(content::WebContents* web_contents)
: web_contents_(web_contents) {
registrar_.Add(this, content::NOTIFICATION_NAV_LIST_PRUNED,
content::NotificationService::AllSources());
}
NavigationTimeHelper::~NavigationTimeHelper() {}
base::Time NavigationTimeHelper::GetNavigationTime(
const content::NavigationEntry* entry) {
const void* entry_key = entry;
base::Time local_time = entry->GetTimestamp();
NavigationTimeCache::iterator iter = time_cache_.find(entry_key);
if (iter == time_cache_.end() || iter->second.local_time != local_time) {
// Calculate navigation time for new entry or existing entry that has new
// navigation.
base::Time navigation_time = GetNetworkTime(local_time);
if (iter == time_cache_.end()) {
time_cache_.insert(std::make_pair(entry_key,
NavigationTimeInfo(local_time,
navigation_time)));
} else {
iter->second = NavigationTimeInfo(local_time, navigation_time);
}
return navigation_time;
} else {
// Use the navigation time calculated before for unchanged entry.
return iter->second.network_time;
}
}
void NavigationTimeHelper::Observe(
int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
DCHECK_EQ(type, content::NOTIFICATION_NAV_LIST_PRUNED);
// Drop pruned entries from cache.
const content::NavigationController& controller =
web_contents_->GetController();
NavigationTimeCache new_cache;
for (int i = 0; i < controller.GetEntryCount(); ++i) {
const void* entry_key = controller.GetEntryAtIndex(i);
NavigationTimeCache::const_iterator iter = time_cache_.find(entry_key);
if (iter != time_cache_.end()) {
new_cache.insert(std::make_pair(entry_key, iter->second));
}
}
time_cache_.swap(new_cache);
}
base::Time NavigationTimeHelper::GetNetworkTime(base::Time local_time) {
Profile* profile =
Profile::FromBrowserContext(web_contents_->GetBrowserContext());
return NetworkTimeServiceFactory::GetForProfile(profile)->
GetNetworkTime(local_time);
}
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