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// 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 "content/browser/time_zone_monitor.h"
#include "base/logging.h"
#include "build/build_config.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_process_host.h"
#include "third_party/icu/source/common/unicode/unistr.h"
#include "third_party/icu/source/i18n/unicode/timezone.h"
namespace content {
TimeZoneMonitor::TimeZoneMonitor() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
}
TimeZoneMonitor::~TimeZoneMonitor() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
}
void TimeZoneMonitor::NotifyRenderers() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
#if defined(OS_CHROMEOS)
// On CrOS, ICU's default tz is already set to a new zone. No
// need to redetect it with detectHostTimeZone().
scoped_ptr<icu::TimeZone> new_zone(icu::TimeZone::createDefault());
#else
icu::TimeZone* new_zone = icu::TimeZone::detectHostTimeZone();
#if defined(OS_LINUX)
// We get here multiple times on Linux per a single tz change, but
// want to update the ICU default zone and notify renderer only once.
scoped_ptr<icu::TimeZone> current_zone(icu::TimeZone::createDefault());
if (*current_zone == *new_zone) {
VLOG(1) << "timezone already updated";
delete new_zone;
return;
}
#endif
icu::TimeZone::adoptDefault(new_zone);
#endif
icu::UnicodeString zone_id;
std::string zone_id_str;
new_zone->getID(zone_id).toUTF8String(zone_id_str);
VLOG(1) << "timezone reset to " << zone_id_str;
for (RenderProcessHost::iterator iterator =
RenderProcessHost::AllHostsIterator();
!iterator.IsAtEnd();
iterator.Advance()) {
iterator.GetCurrentValue()->NotifyTimezoneChange(zone_id_str);
}
}
} // namespace content
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