1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "athena/system/time_view.h"
6
7#include "base/i18n/time_formatting.h"
8#include "third_party/skia/include/core/SkColor.h"
9#include "ui/views/border.h"
10
11namespace athena {
12namespace {
13
14// Amount of slop to add into the timer to make sure we're into the next minute
15// when the timer goes off.
16const int kTimerSlopSeconds = 1;
17
18}  // namespace
19
20TimeView::TimeView(SystemUI::ColorScheme color_scheme) {
21  SetHorizontalAlignment(gfx::ALIGN_LEFT);
22  SetEnabledColor((color_scheme == SystemUI::COLOR_SCHEME_LIGHT)
23                      ? SK_ColorWHITE
24                      : SK_ColorDKGRAY);
25  SetAutoColorReadabilityEnabled(false);
26  SetFontList(gfx::FontList().DeriveWithStyle(gfx::Font::BOLD));
27  SetSubpixelRenderingEnabled(false);
28
29  const int kHorizontalSpacing = 10;
30  const int kVerticalSpacing = 3;
31  SetBorder(views::Border::CreateEmptyBorder(kVerticalSpacing,
32                                             kHorizontalSpacing,
33                                             kVerticalSpacing,
34                                             kHorizontalSpacing));
35
36  UpdateText();
37}
38
39TimeView::~TimeView() {
40}
41
42void TimeView::SetTimer(base::Time now) {
43  // Try to set the timer to go off at the next change of the minute. We don't
44  // want to have the timer go off more than necessary since that will cause
45  // the CPU to wake up and consume power.
46  base::Time::Exploded exploded;
47  now.LocalExplode(&exploded);
48
49  // Often this will be called at minute boundaries, and we'll actually want
50  // 60 seconds from now.
51  int seconds_left = 60 - exploded.second;
52  if (seconds_left == 0)
53    seconds_left = 60;
54
55  // Make sure that the timer fires on the next minute. Without this, if it is
56  // called just a teeny bit early, then it will skip the next minute.
57  seconds_left += kTimerSlopSeconds;
58
59  timer_.Stop();
60  timer_.Start(
61      FROM_HERE, base::TimeDelta::FromSeconds(seconds_left),
62      this, &TimeView::UpdateText);
63}
64
65void TimeView::UpdateText() {
66  base::Time now = base::Time::Now();
67  SetText(base::TimeFormatTimeOfDayWithHourClockType(
68      now, base::k12HourClock, base::kKeepAmPm));
69  SetTimer(now);
70}
71
72}  // namespace athena
73