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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/chrome_notification_types.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 "views/controls/menu/menu_runner.h"
#include "views/widget/widget.h"
#include "unicode/datefmt.h"
namespace {
// views::MenuItemView item ids
enum ClockMenuItem {
CLOCK_DISPLAY_ITEM,
CLOCK_OPEN_OPTIONS_ITEM
};
} // namespace
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 TimezoneSettings observer. We update the clock if timezone changes.
system::TimezoneSettings::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() {
timer_.Stop();
CrosLibrary::Get()->GetPowerLibrary()->RemoveObserver(this);
system::TimezoneSettings::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);
SetText(UTF16ToWide(base::TimeFormatTimeOfDayWithHourClockType(
time,
use_24hour_clock ? base::k24HourClock : base::k12HourClock,
base::kDropAmPm)));
SetTooltipText(UTF16ToWide(base::TimeFormatFriendlyDateAndTime(time)));
SetAccessibleName(base::TimeFormatFriendlyDateAndTime(time));
SchedulePaint();
}
// ClockMenuButton, NotificationObserver implementation:
void ClockMenuButton::Observe(int type,
const NotificationSource& source,
const NotificationDetails& details) {
if (type == chrome::NOTIFICATION_PREF_CHANGED) {
std::string* pref_name = Details<std::string>(details).ptr();
if (*pref_name == prefs::kUse24HourClock) {
UpdateText();
}
}
}
// ClockMenuButton, views::MenuDelegate implementation:
std::wstring ClockMenuButton::GetLabel(int id) const {
DCHECK_EQ(CLOCK_DISPLAY_ITEM, id);
const string16 label = base::TimeFormatFriendlyDate(base::Time::Now());
return UTF16ToWide(label);
}
bool ClockMenuButton::IsCommandEnabled(int id) const {
DCHECK(id == CLOCK_DISPLAY_ITEM || id == CLOCK_OPEN_OPTIONS_ITEM);
return id == CLOCK_OPEN_OPTIONS_ITEM;
}
void ClockMenuButton::ExecuteCommand(int id) {
DCHECK_EQ(CLOCK_OPEN_OPTIONS_ITEM, id);
host_->OpenButtonOptions(this);
}
// ClockMenuButton, PowerLibrary::Observer implementation:
void ClockMenuButton::SystemResumed() {
UpdateText();
}
// ClockMenuButton, SystemLibrary::Observer implementation:
void ClockMenuButton::TimezoneChanged(const icu::TimeZone& timezone) {
UpdateText();
}
int ClockMenuButton::horizontal_padding() {
return 3;
}
// ClockMenuButton, views::ViewMenuDelegate implementation:
void ClockMenuButton::RunMenu(views::View* source, const gfx::Point& pt) {
// View passed in must be a views::MenuButton, i.e. the ClockMenuButton.
DCHECK_EQ(source, this);
EnsureMenu();
gfx::Point screen_location;
views::View::ConvertPointToScreen(source, &screen_location);
gfx::Rect bounds(screen_location, source->size());
if (menu_runner_->RunMenuAt(
source->GetWidget()->GetTopLevelWidget(), this, bounds,
views::MenuItemView::TOPRIGHT, views::MenuRunner::HAS_MNEMONICS) ==
views::MenuRunner::MENU_DELETED)
return;
}
// ClockMenuButton, views::View implementation:
void ClockMenuButton::OnLocaleChanged() {
UpdateText();
}
void ClockMenuButton::EnsureMenu() {
if (menu_runner_.get())
return;
views::MenuItemView* menu = new views::MenuItemView(this);
// menu_runner_ takes ownership of menu.
menu_runner_.reset(new views::MenuRunner(menu));
// Text for this item will be set by GetLabel().
menu->AppendDelegateMenuItem(CLOCK_DISPLAY_ITEM);
// If options dialog is unavailable, don't show a separator and configure
// menu item.
if (host_->ShouldOpenButtonOptions(this)) {
menu->AppendSeparator();
const string16 clock_open_options_label =
l10n_util::GetStringUTF16(IDS_STATUSBAR_CLOCK_OPEN_OPTIONS_DIALOG);
menu->AppendMenuItemWithLabel(
CLOCK_OPEN_OPTIONS_ITEM,
UTF16ToWide(clock_open_options_label));
}
}
} // namespace chromeos
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