ash uber tray: Add entry for power and date.

ash/system/power/tray_power_date.cc

+// Copyright (c) 2012 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 "ash/system/power/tray_power_date.h"
+
+#include "ash/shell.h"
+#include "ash/system/power/power_supply_status.h"
+#include "ash/system/tray/system_tray_delegate.h"
+#include "base/i18n/time_formatting.h"
+#include "base/stringprintf.h"
+#include "base/time.h"
+#include "base/timer.h"
+#include "base/utf_string_conversions.h"
+#include "grit/ui_resources.h"
+#include "third_party/skia/include/core/SkBitmap.h"
+#include "third_party/skia/include/core/SkRect.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/image/image.h"
+#include "ui/gfx/size.h"
+#include "ui/views/controls/button/button.h"
+#include "ui/views/controls/button/text_button.h"
+#include "ui/views/controls/image_view.h"
+#include "ui/views/controls/label.h"
+#include "ui/views/layout/box_layout.h"
+#include "ui/views/view.h"
+#include "unicode/datefmt.h"
+#include "unicode/fieldpos.h"
+#include "unicode/fmtable.h"
+
+namespace ash {
+namespace internal {
+
+namespace {
+// Width and height of battery images.
+const int kBatteryImageHeight = 26;
+const int kBatteryImageWidth = 24;
+// Number of different power states.
+const int kNumPowerImages = 20;
+// 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;
+
+string16 FormatNicely(const base::Time& time) {
+  icu::UnicodeString date_string;
+
+  scoped_ptr<icu::DateFormat> formatter(
+      icu::DateFormat::createDateInstance(icu::DateFormat::kFull));
+  icu::FieldPosition position;
+  position.setField(UDAT_DAY_OF_WEEK_FIELD);
+  formatter->format(static_cast<UDate>(time.ToDoubleT() * 1000), date_string,
+      position);

[stevenjb, 2012/03/02 18:18:26]

nit: date_string on separate line, and aligned with first arg, or all three args
on second line.

[sadrul, 2012/03/02 18:52:42]

Done. (style-guide allows both)

[stevenjb, 2012/03/02 19:31:46]

The chromium style guide says "put each argument on a separate line unless
everything fits on one line":
https://sites.google.com/a/chromium.org/dev/developers/coding-style#TOC-Code-...
(This came up recently on a review of my own :) I forgot that even all args on
the second line is against the style guide, although I see that a lot)

[sadrul, 2012/03/02 19:34:54]

This is for function definitions. The next bullet: "When calling a function,
however, feel free to collapse things to take less space.  Do whatever seems
most readable" :)

+  icu::UnicodeString day = date_string.retainBetween(position.getBeginIndex(),
+      position.getEndIndex());

[stevenjb, 2012/03/02 18:18:26]

nit: aligin 2nd arg with 1st, or both on second line

[sadrul, 2012/03/02 18:52:42]

ditto

+
+  date_string.remove();
+  formatter.reset(
+      icu::DateFormat::createDateInstance(icu::DateFormat::kMedium));
+  formatter->format(static_cast<UDate>(time.ToDoubleT() * 1000), date_string);
+
+  date_string += "\n";
+  date_string += day;
+
+  return string16(date_string.getBuffer(),
+                  static_cast<size_t>(date_string.length()));
+}
+
+}
+
+namespace tray {
+
+// This view is used for both the tray and the popup.
+class DateView : public views::Label {
+ public:
+  enum TimeType {
+    TIME,
+    DATE
+  };
+
+  DateView(base::HourClockType hour_type, TimeType type)
+      : hour_type_(hour_type),
+        type_(type) {
+    UpdateText();
+  }
+
+  virtual ~DateView() {
+    timer_.Stop();
+  }
+
+ private:
+  void UpdateText() {
+    base::Time now = base::Time::Now();
+    if (type_ == TIME) {
+      SetText(base::TimeFormatTimeOfDayWithHourClockType(now, hour_type_,
+              base::kDropAmPm));

[stevenjb, 2012/03/02 18:18:26]

nit: alignment

[sadrul, 2012/03/02 18:52:42]

Done.

+    } else {
+      SetText(FormatNicely(now));
+    }
+
+    SetTooltipText(base::TimeFormatFriendlyDate(now));
+    SchedulePaint();
+
+    // 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::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(FROM_HERE, base::TimeDelta::FromSeconds(seconds_left), this,
+        &DateView::UpdateText);

[stevenjb, 2012/03/02 18:18:26]

nit: arg alignment

+  }
+
+  // Overridden from views::View.
+  virtual void OnLocaleChanged() OVERRIDE {
+    UpdateText();
+  }
+
+  base::OneShotTimer<DateView> timer_;
+  base::HourClockType hour_type_;
+  TimeType type_;
+
+  DISALLOW_COPY_AND_ASSIGN(DateView);
+};
+
+// This view is used only for the tray.
+class PowerTrayView : public views::ImageView {
+ public:
+  PowerTrayView() {
+    UpdateImage();
+  }
+
+  virtual ~PowerTrayView() {
+  }
+
+  void UpdatePowerStatus(const PowerSupplyStatus& status) {
+    supply_status_ = status;
+    // Sanitize.
+    if (supply_status_.battery_is_full)
+      supply_status_.battery_percentage = 100.0;
+
+    UpdateImage();
+  }
+
+ private:
+  void UpdateImage() {
+    SkBitmap image;
+    gfx::Image all = ui::ResourceBundle::GetSharedInstance().GetImageNamed(
+        IDR_AURA_UBER_TRAY_POWER_SMALL);
+
+    int image_index = 0;
+    if (supply_status_.battery_percentage >= 100) {
+      image_index = kNumPowerImages - 1;
+    } else if (!supply_status_.battery_is_present) {
+      image_index = kNumPowerImages;
+    } else {
+      image_index = static_cast<int> (
+          supply_status_.battery_percentage / 100.0 *
+          (kNumPowerImages - 1));
+      image_index =
+        std::max(std::min(image_index, kNumPowerImages - 2), 0);
+    }
+
+    SkIRect region = SkIRect::MakeXYWH(
+        image_index * kBatteryImageWidth,
+        supply_status_.line_power_on ? 0 : kBatteryImageHeight,
+        kBatteryImageWidth, kBatteryImageHeight);
+    all.ToSkBitmap()->extractSubset(&image, region);
+
+    SetImage(image);
+  }
+
+  PowerSupplyStatus supply_status_;
+
+  DISALLOW_COPY_AND_ASSIGN(PowerTrayView);
+};
+
+// This view is used only for the popup.
+class PowerPopupView : public views::Label {
+ public:
+  PowerPopupView() {
+    SetHorizontalAlignment(ALIGN_RIGHT);
+    UpdateText();
+  }
+
+  virtual ~PowerPopupView() {
+  }
+
+  void UpdatePowerStatus(const PowerSupplyStatus& status) {
+    supply_status_ = status;
+    // Sanitize.
+    if (supply_status_.battery_is_full)
+      supply_status_.battery_percentage = 100.0;
+
+    UpdateText();
+  }
+
+ private:
+  void UpdateText() {
+    base::TimeDelta time = base::TimeDelta::FromSeconds(
+        supply_status_.line_power_on ?
+        supply_status_.battery_seconds_to_full :
+        supply_status_.battery_seconds_to_empty);
+    int hour = time.InHours();
+    int min = (time - base::TimeDelta::FromHours(hour)).InMinutes();
+    // TODO: Translation
+    SetText(ASCIIToUTF16(base::StringPrintf("Battery: %.0lf%%\n%dh%02dm",
+          supply_status_.battery_percentage,
+          hour, min)));
+  }
+
+  PowerSupplyStatus supply_status_;
+
+  DISALLOW_COPY_AND_ASSIGN(PowerPopupView);
+};
+
+}  // namespace tray
+
+TrayPowerDate::TrayPowerDate()
+    : power_(NULL),
+      power_tray_(NULL) {
+}
+
+TrayPowerDate::~TrayPowerDate() {
+}
+
+views::View* TrayPowerDate::CreateTrayView() {
+  date_tray_.reset(new tray::DateView(base::k24HourClock,
+                                      tray::DateView::TIME));
+  date_tray_->SetFont(date_tray_->font().DeriveFont(-1, gfx::Font::BOLD));
+  date_tray_->SetAutoColorReadabilityEnabled(false);
+  date_tray_->SetEnabledColor(SK_ColorWHITE);
+
+  power_tray_.reset(new tray::PowerTrayView());
+
+  views::View* container = new views::View;
+  container->SetLayoutManager(new views::BoxLayout(
+        views::BoxLayout::kHorizontal, 0, 0, 0));
+  container->AddChildView(power_tray_.get());
+  container->AddChildView(date_tray_.get());
+
+  return container;
+}
+
+views::View* TrayPowerDate::CreateDefaultView() {
+  date_.reset(new tray::DateView(base::k24HourClock,
+                                      tray::DateView::DATE));

[stevenjb, 2012/03/02 18:18:26]

nit: alignment

[sadrul, 2012/03/02 18:52:42]

Done.

+  power_.reset(new tray::PowerPopupView());
+
+  views::View* container = new views::View;
+  views::BoxLayout* layout = new
+      views::BoxLayout(views::BoxLayout::kHorizontal, 0, 10, 0);
+  layout->set_spread_blank_space(true);
+  container->SetLayoutManager(layout);
+  container->set_background(views::Background::CreateSolidBackground(
+        SkColorSetARGB(255, 240, 240, 240)));

[stevenjb, 2012/03/02 18:18:26]

nit: alignment

[sadrul, 2012/03/02 18:52:42]

Done.

+  container->AddChildView(date_.get());
+  container->AddChildView(power_.get());
+  return container;
+}
+
+views::View* TrayPowerDate::CreateDetailedView() {
+  return NULL;
+}
+
+void TrayPowerDate::DestroyTrayView() {
+  date_tray_.reset();
+  power_tray_.reset();
+}
+
+void TrayPowerDate::DestroyDefaultView() {
+  date_.reset();
+  power_.reset();
+}
+
+void TrayPowerDate::DestroyDetailedView() {
+}
+
+void TrayPowerDate::OnPowerStatusChanged(const PowerSupplyStatus& status) {
+  power_tray_->UpdatePowerStatus(status);
+  if (power_.get())
+    power_->UpdatePowerStatus(status);
+}
+
+}  // namespace internal
+}  // namespace ash