1 // Copyright (c) 2011 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 "ui/base/l10n/time_format.h"
6
7 #include <limits>
8
9 #include "base/lazy_instance.h"
10 #include "base/logging.h"
11 #include "base/strings/string_util.h"
12 #include "base/time/time.h"
13 #include "grit/ui_strings.h"
14 #include "third_party/icu/source/common/unicode/unistr.h"
15 #include "ui/base/l10n/formatter.h"
16 #include "ui/base/l10n/l10n_util.h"
17 #include "ui/base/ui_base_export.h"
18
19 using base::Time;
20 using base::TimeDelta;
21 using ui::TimeFormat;
22
23 namespace ui {
24
25 UI_BASE_EXPORT base::LazyInstance<FormatterContainer> g_container =
26 LAZY_INSTANCE_INITIALIZER;
27
28 // static
Simple(TimeFormat::Format format,TimeFormat::Length length,const base::TimeDelta & delta)29 base::string16 TimeFormat::Simple(TimeFormat::Format format,
30 TimeFormat::Length length,
31 const base::TimeDelta& delta) {
32 return Detailed(format, length, 0, delta);
33 }
34
35 // static
Detailed(TimeFormat::Format format,TimeFormat::Length length,int cutoff,const base::TimeDelta & delta)36 base::string16 TimeFormat::Detailed(TimeFormat::Format format,
37 TimeFormat::Length length,
38 int cutoff,
39 const base::TimeDelta& delta) {
40 if (delta < TimeDelta::FromSeconds(0)) {
41 NOTREACHED() << "Negative duration";
42 return base::string16();
43 }
44
45 // Negative cutoff: always use two-value format.
46 if (cutoff < 0)
47 cutoff = std::numeric_limits<int>::max();
48
49 const TimeDelta one_minute(TimeDelta::FromMinutes(1));
50 const TimeDelta one_hour(TimeDelta::FromHours(1));
51 const TimeDelta one_day(TimeDelta::FromDays(1));
52 const TimeDelta half_second(TimeDelta::FromMilliseconds(500));
53 const TimeDelta half_minute(TimeDelta::FromSeconds(30));
54 const TimeDelta half_hour(TimeDelta::FromMinutes(30));
55 const TimeDelta half_day(TimeDelta::FromHours(12));
56
57 // Rationale: Start by determining major (first) unit, then add minor (second)
58 // unit if mandated by |cutoff|.
59 icu::UnicodeString time_string;
60 const Formatter* formatter = g_container.Get().Get(format, length);
61 if (delta < one_minute - half_second) {
62 // Anything up to 59.500 seconds is formatted as seconds.
63 const int seconds = static_cast<int>((delta + half_second).InSeconds());
64 formatter->Format(Formatter::UNIT_SEC, seconds, time_string);
65
66 } else if (delta < one_hour - (cutoff < 60 ? half_minute : half_second)) {
67 // Anything up to 59.5 minutes (respectively 59:59.500 when |cutoff| permits
68 // two-value output) is formatted as minutes (respectively minutes and
69 // seconds).
70 if (delta >= cutoff * one_minute - half_second) {
71 const int minutes = (delta + half_minute).InMinutes();
72 formatter->Format(Formatter::UNIT_MIN, minutes, time_string);
73 } else {
74 const int minutes = (delta + half_second).InMinutes();
75 const int seconds = static_cast<int>(
76 (delta + half_second).InSeconds() % 60);
77 formatter->Format(Formatter::TWO_UNITS_MIN_SEC,
78 minutes, seconds, time_string);
79 }
80
81 } else if (delta < one_day - (cutoff < 24 ? half_hour : half_minute)) {
82 // Anything up to 23.5 hours (respectively 23:59:30.000 when |cutoff|
83 // permits two-value output) is formatted as hours (respectively hours and
84 // minutes).
85 if (delta >= cutoff * one_hour - half_minute) {
86 const int hours = (delta + half_hour).InHours();
87 formatter->Format(Formatter::UNIT_HOUR, hours, time_string);
88 } else {
89 const int hours = (delta + half_minute).InHours();
90 const int minutes = (delta + half_minute).InMinutes() % 60;
91 formatter->Format(Formatter::TWO_UNITS_HOUR_MIN,
92 hours, minutes, time_string);
93 }
94
95 } else {
96 // Anything bigger is formatted as days (respectively days and hours).
97 if (delta >= cutoff * one_day - half_hour) {
98 const int days = (delta + half_day).InDays();
99 formatter->Format(Formatter::UNIT_DAY, days, time_string);
100 } else {
101 const int days = (delta + half_hour).InDays();
102 const int hours = (delta + half_hour).InHours() % 24;
103 formatter->Format(Formatter::TWO_UNITS_DAY_HOUR,
104 days, hours, time_string);
105 }
106 }
107
108 const int capacity = time_string.length() + 1;
109 DCHECK_GT(capacity, 1);
110 base::string16 result;
111 UErrorCode error = U_ZERO_ERROR;
112 time_string.extract(static_cast<UChar*>(WriteInto(&result, capacity)),
113 capacity, error);
114 DCHECK(U_SUCCESS(error));
115 return result;
116 }
117
118 // static
RelativeDate(const Time & time,const Time * optional_midnight_today)119 base::string16 TimeFormat::RelativeDate(
120 const Time& time,
121 const Time* optional_midnight_today) {
122 Time midnight_today = optional_midnight_today ? *optional_midnight_today :
123 Time::Now().LocalMidnight();
124 TimeDelta day = TimeDelta::FromMicroseconds(Time::kMicrosecondsPerDay);
125 Time tomorrow = midnight_today + day;
126 Time yesterday = midnight_today - day;
127 if (time >= tomorrow)
128 return base::string16();
129 else if (time >= midnight_today)
130 return l10n_util::GetStringUTF16(IDS_PAST_TIME_TODAY);
131 else if (time >= yesterday)
132 return l10n_util::GetStringUTF16(IDS_PAST_TIME_YESTERDAY);
133 return base::string16();
134 }
135
136 } // namespace ui
137