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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/chromeos/status/clock_menu_button.h"
#include "base/i18n/time_formatting.h"
#include "base/string_util.h"
#include "base/time.h"
#include "base/utf_string_conversions.h"
#include "chrome/browser/chromeos/cros/cros_library.h"
#include "chrome/browser/chromeos/status/status_area_host.h"
#include "chrome/browser/prefs/pref_service.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/common/pref_names.h"
#include "content/common/notification_details.h"
#include "content/common/notification_source.h"
#include "grit/generated_resources.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/font.h"
#include "unicode/datefmt.h"
namespace chromeos {
// Amount of slop to add into the timer to make sure we're into the next minute
// when the timer goes off.
const int kTimerSlopSeconds = 1;
ClockMenuButton::ClockMenuButton(StatusAreaHost* host)
: StatusAreaButton(host, this) {
// Add as SystemAccess observer. We update the clock if timezone changes.
SystemAccess::GetInstance()->AddObserver(this);
CrosLibrary::Get()->GetPowerLibrary()->AddObserver(this);
// Start monitoring the kUse24HourClock preference.
if (host->GetProfile()) { // This can be NULL in the login screen.
registrar_.Init(host->GetProfile()->GetPrefs());
registrar_.Add(prefs::kUse24HourClock, this);
}
UpdateTextAndSetNextTimer();
}
ClockMenuButton::~ClockMenuButton() {
CrosLibrary::Get()->GetPowerLibrary()->RemoveObserver(this);
SystemAccess::GetInstance()->RemoveObserver(this);
}
void ClockMenuButton::UpdateTextAndSetNextTimer() {
UpdateText();
// Try to set the timer to go off at the next change of the minute. We don't
// want to have the timer go off more than necessary since that will cause
// the CPU to wake up and consume power.
base::Time now = base::Time::Now();
base::Time::Exploded exploded;
now.LocalExplode(&exploded);
// Often this will be called at minute boundaries, and we'll actually want
// 60 seconds from now.
int seconds_left = 60 - exploded.second;
if (seconds_left == 0)
seconds_left = 60;
// Make sure that the timer fires on the next minute. Without this, if it is
// called just a teeny bit early, then it will skip the next minute.
seconds_left += kTimerSlopSeconds;
timer_.Start(base::TimeDelta::FromSeconds(seconds_left), this,
&ClockMenuButton::UpdateTextAndSetNextTimer);
}
void ClockMenuButton::UpdateText() {
base::Time time(base::Time::Now());
// If the profie is present, check the use 24-hour clock preference.
const bool use_24hour_clock =
host_->GetProfile() &&
host_->GetProfile()->GetPrefs()->GetBoolean(prefs::kUse24HourClock);
if (use_24hour_clock) {
SetText(UTF16ToWide(base::TimeFormatTimeOfDayWithHourClockType(
time, base::k24HourClock)));
} else {
// Remove the am/pm field if it's present.
scoped_ptr<icu::DateFormat> formatter(
icu::DateFormat::createTimeInstance(icu::DateFormat::kShort));
icu::UnicodeString time_string;
icu::FieldPosition ampm_field(icu::DateFormat::kAmPmField);
formatter->format(
static_cast<UDate>(time.ToDoubleT() * 1000), time_string, ampm_field);
int ampm_length = ampm_field.getEndIndex() - ampm_field.getBeginIndex();
if (ampm_length) {
int begin = ampm_field.getBeginIndex();
// Doesn't include any spacing before the field.
if (begin)
begin--;
time_string.removeBetween(begin, ampm_field.getEndIndex());
}
string16 time_string16 =
string16(time_string.getBuffer(),
static_cast<size_t>(time_string.length()));
SetText(UTF16ToWide(time_string16));
}
SetTooltipText(UTF16ToWide(base::TimeFormatShortDate(time)));
SchedulePaint();
}
////////////////////////////////////////////////////////////////////////////////
// ClockMenuButton, NotificationObserver implementation:
void ClockMenuButton::Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details) {
if (type == NotificationType::PREF_CHANGED) {
std::string* pref_name = Details<std::string>(details).ptr();
if (*pref_name == prefs::kUse24HourClock) {
UpdateText();
}
}
}
////////////////////////////////////////////////////////////////////////////////
// ClockMenuButton, ui::MenuModel implementation:
int ClockMenuButton::GetItemCount() const {
// If options dialog is unavailable, don't count a separator and configure
// menu item.
return host_->ShouldOpenButtonOptions(this) ? 3 : 1;
}
ui::MenuModel::ItemType ClockMenuButton::GetTypeAt(int index) const {
// There's a separator between the current date and the menu item to open
// the options menu.
return index == 1 ? ui::MenuModel::TYPE_SEPARATOR:
ui::MenuModel::TYPE_COMMAND;
}
string16 ClockMenuButton::GetLabelAt(int index) const {
if (index == 0)
return base::TimeFormatFriendlyDate(base::Time::Now());
return l10n_util::GetStringUTF16(IDS_STATUSBAR_CLOCK_OPEN_OPTIONS_DIALOG);
}
bool ClockMenuButton::IsEnabledAt(int index) const {
// The 1st item is the current date, which is disabled.
return index != 0;
}
void ClockMenuButton::ActivatedAt(int index) {
host_->OpenButtonOptions(this);
}
///////////////////////////////////////////////////////////////////////////////
// ClockMenuButton, PowerLibrary::Observer implementation:
void ClockMenuButton::SystemResumed() {
UpdateText();
}
///////////////////////////////////////////////////////////////////////////////
// ClockMenuButton, SystemAccess::Observer implementation:
void ClockMenuButton::TimezoneChanged(const icu::TimeZone& timezone) {
UpdateText();
}
////////////////////////////////////////////////////////////////////////////////
// ClockMenuButton, views::ViewMenuDelegate implementation:
void ClockMenuButton::RunMenu(views::View* source, const gfx::Point& pt) {
if (!clock_menu_.get())
clock_menu_.reset(new views::Menu2(this));
else
clock_menu_->Rebuild();
clock_menu_->UpdateStates();
clock_menu_->RunMenuAt(pt, views::Menu2::ALIGN_TOPRIGHT);
}
////////////////////////////////////////////////////////////////////////////////
// ClockMenuButton, views::View implementation:
void ClockMenuButton::OnLocaleChanged() {
UpdateText();
}
} // namespace chromeos
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