1 // Copyright 2011 The Chromium Authors
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "base/i18n/time_formatting.h"
12 #include "base/i18n/unicodestring.h"
13 #include "base/logging.h"
14 #include "base/notreached.h"
15 #include "base/numerics/safe_conversions.h"
16 #include "base/strings/string_piece.h"
17 #include "base/strings/utf_string_conversions.h"
18 #include "base/time/time.h"
19 #include "build/chromeos_buildflags.h"
20 #include "third_party/icu/source/common/unicode/locid.h"
21 #include "third_party/icu/source/common/unicode/utypes.h"
22 #include "third_party/icu/source/i18n/unicode/datefmt.h"
23 #include "third_party/icu/source/i18n/unicode/dtitvfmt.h"
24 #include "third_party/icu/source/i18n/unicode/dtptngen.h"
25 #include "third_party/icu/source/i18n/unicode/fmtable.h"
26 #include "third_party/icu/source/i18n/unicode/measfmt.h"
27 #include "third_party/icu/source/i18n/unicode/smpdtfmt.h"
28 #include "third_party/icu/source/i18n/unicode/timezone.h"
33 UDate ToUDate(const Time& time) {
34 // TODO(crbug.com/1392437): Consider using the `...IgnoringNull` variant and
35 // adding a `CHECK(!time.is_null())`; trying to format a null Time as a string
36 // is almost certainly an indication that the caller has made a mistake.
37 return time.InMillisecondsFSinceUnixEpoch();
40 std::u16string TimeFormat(const icu::DateFormat& formatter, const Time& time) {
41 icu::UnicodeString date_string;
43 formatter.format(ToUDate(time), date_string);
44 return i18n::UnicodeStringToString16(date_string);
47 std::u16string TimeFormatWithoutAmPm(const icu::DateFormat* formatter,
50 icu::UnicodeString time_string;
52 icu::FieldPosition ampm_field(icu::DateFormat::kAmPmField);
53 formatter->format(ToUDate(time), time_string, ampm_field);
54 int ampm_length = ampm_field.getEndIndex() - ampm_field.getBeginIndex();
56 int begin = ampm_field.getBeginIndex();
57 // Doesn't include any spacing before the field.
60 time_string.removeBetween(begin, ampm_field.getEndIndex());
62 return i18n::UnicodeStringToString16(time_string);
65 icu::SimpleDateFormat CreateSimpleDateFormatter(
67 bool generate_pattern = true,
68 const icu::Locale& locale = icu::Locale::getDefault()) {
69 UErrorCode status = U_ZERO_ERROR;
70 icu::UnicodeString generated_pattern(pattern.data(), pattern.length());
72 if (generate_pattern) {
73 // Generate a locale-dependent format pattern. The generator will take
74 // care of locale-dependent formatting issues like which separator to
75 // use (some locales use '.' instead of ':'), and where to put the am/pm
77 std::unique_ptr<icu::DateTimePatternGenerator> generator(
78 icu::DateTimePatternGenerator::createInstance(status));
79 DCHECK(U_SUCCESS(status));
80 generated_pattern = generator->getBestPattern(generated_pattern, status);
81 DCHECK(U_SUCCESS(status));
84 // Then, format the time using the desired pattern.
85 icu::SimpleDateFormat formatter(generated_pattern, locale, status);
86 DCHECK(U_SUCCESS(status));
91 UMeasureFormatWidth DurationWidthToMeasureWidth(DurationFormatWidth width) {
93 case DURATION_WIDTH_WIDE: return UMEASFMT_WIDTH_WIDE;
94 case DURATION_WIDTH_SHORT: return UMEASFMT_WIDTH_SHORT;
95 case DURATION_WIDTH_NARROW: return UMEASFMT_WIDTH_NARROW;
96 case DURATION_WIDTH_NUMERIC: return UMEASFMT_WIDTH_NUMERIC;
99 return UMEASFMT_WIDTH_COUNT;
102 const char* DateFormatToString(DateFormat format) {
104 case DATE_FORMAT_YEAR_MONTH:
105 return UDAT_YEAR_MONTH;
106 case DATE_FORMAT_MONTH_WEEKDAY_DAY:
107 return UDAT_MONTH_WEEKDAY_DAY;
110 return UDAT_YEAR_MONTH_DAY;
115 std::u16string TimeFormatTimeOfDay(const Time& time) {
116 // We can omit the locale parameter because the default should match
117 // Chrome's application locale.
118 std::unique_ptr<icu::DateFormat> formatter(
119 icu::DateFormat::createTimeInstance(icu::DateFormat::kShort));
120 return TimeFormat(*formatter, time);
123 std::u16string TimeFormatTimeOfDayWithMilliseconds(const Time& time) {
124 icu::SimpleDateFormat formatter = CreateSimpleDateFormatter("HmsSSS");
125 return TimeFormatWithoutAmPm(&formatter, time);
128 std::u16string TimeFormatTimeOfDayWithHourClockType(const Time& time,
130 AmPmClockType ampm) {
131 // Just redirect to the normal function if the default type matches the
133 HourClockType default_type = GetHourClockType();
134 if (default_type == type && (type == k24HourClock || ampm == kKeepAmPm)) {
135 return TimeFormatTimeOfDay(time);
138 const char* base_pattern = (type == k12HourClock ? "ahm" : "Hm");
139 icu::SimpleDateFormat formatter = CreateSimpleDateFormatter(base_pattern);
141 return (ampm == kKeepAmPm) ? TimeFormat(formatter, time)
142 : TimeFormatWithoutAmPm(&formatter, time);
145 std::u16string TimeFormatShortDate(const Time& time) {
146 std::unique_ptr<icu::DateFormat> formatter(
147 icu::DateFormat::createDateInstance(icu::DateFormat::kMedium));
148 return TimeFormat(*formatter, time);
151 std::u16string TimeFormatShortDateNumeric(const Time& time) {
152 std::unique_ptr<icu::DateFormat> formatter(
153 icu::DateFormat::createDateInstance(icu::DateFormat::kShort));
154 return TimeFormat(*formatter, time);
157 std::u16string TimeFormatShortDateAndTime(const Time& time) {
158 std::unique_ptr<icu::DateFormat> formatter(
159 icu::DateFormat::createDateTimeInstance(icu::DateFormat::kShort));
160 return TimeFormat(*formatter, time);
163 std::u16string TimeFormatShortDateAndTimeWithTimeZone(const Time& time) {
164 std::unique_ptr<icu::DateFormat> formatter(
165 icu::DateFormat::createDateTimeInstance(icu::DateFormat::kShort,
166 icu::DateFormat::kLong));
167 return TimeFormat(*formatter, time);
170 #if BUILDFLAG(IS_CHROMEOS_ASH)
171 std::u16string TimeFormatMonthAndYearForTimeZone(
173 const icu::TimeZone* time_zone) {
174 icu::SimpleDateFormat formatter =
175 CreateSimpleDateFormatter(DateFormatToString(DATE_FORMAT_YEAR_MONTH));
176 formatter.setTimeZone(*time_zone);
177 return TimeFormat(formatter, time);
181 std::u16string TimeFormatMonthAndYear(const Time& time) {
183 CreateSimpleDateFormatter(DateFormatToString(DATE_FORMAT_YEAR_MONTH)),
187 std::u16string TimeFormatFriendlyDateAndTime(const Time& time) {
188 std::unique_ptr<icu::DateFormat> formatter(
189 icu::DateFormat::createDateTimeInstance(icu::DateFormat::kFull));
190 return TimeFormat(*formatter, time);
193 std::u16string TimeFormatFriendlyDate(const Time& time) {
194 std::unique_ptr<icu::DateFormat> formatter(
195 icu::DateFormat::createDateInstance(icu::DateFormat::kFull));
196 return TimeFormat(*formatter, time);
199 std::u16string LocalizedTimeFormatWithPattern(const Time& time,
200 StringPiece pattern) {
201 return TimeFormat(CreateSimpleDateFormatter(std::move(pattern)), time);
204 std::string UnlocalizedTimeFormatWithPattern(const Time& time,
206 const icu::TimeZone* time_zone) {
207 icu::SimpleDateFormat formatter =
208 CreateSimpleDateFormatter({}, false, icu::Locale("en_US"));
210 formatter.setTimeZone(*time_zone);
213 // Formats `time` according to `pattern`.
214 const auto format_time = [&formatter](const Time& time, StringPiece pattern) {
215 formatter.applyPattern(
216 icu::UnicodeString(pattern.data(), pattern.length()));
217 return base::UTF16ToUTF8(TimeFormat(formatter, time));
220 // If `time` has nonzero microseconds, check if the caller requested
221 // microsecond-precision output; this must be handled internally since
222 // `SimpleDateFormat` won't do it.
224 if (const int64_t microseconds =
225 time.ToDeltaSinceWindowsEpoch().InMicroseconds() %
226 Time::kMicrosecondsPerMillisecond) {
227 // Adds digits to `output` for each 'S' at the start of `pattern`.
228 const auto format_microseconds = [&output](int64_t mutable_micros,
229 StringPiece pattern) {
231 for (; i < pattern.length() && pattern[i] == 'S'; ++i) {
232 output += static_cast<char>('0' + mutable_micros / 100);
233 mutable_micros = (mutable_micros % 100) * 10;
238 // Look for fractional seconds patterns with greater-than-millisecond
240 bool in_quotes = false;
241 for (size_t i = 0; i < pattern.length();) {
242 if (pattern[i] == '\'') {
243 in_quotes = !in_quotes;
244 } else if (!in_quotes && !pattern.compare(i, 4, "SSSS")) {
245 // Let ICU format everything up through milliseconds.
246 const size_t fourth_s = i + 3;
248 output += format_time(time, pattern.substr(0, fourth_s));
251 // Add microseconds digits, then truncate to the remaining pattern.
252 pattern = pattern.substr(
254 format_microseconds(microseconds, pattern.substr(fourth_s)));
262 // Format any remaining pattern.
263 if (!pattern.empty()) {
264 output += format_time(time, std::move(pattern));
269 std::string TimeFormatAsIso8601(const Time& time) {
270 return UnlocalizedTimeFormatWithPattern(time, "yyyy-MM-dd'T'HH:mm:ss.SSSX",
271 icu::TimeZone::getGMT());
274 std::string TimeFormatHTTP(const Time& time) {
275 return UnlocalizedTimeFormatWithPattern(time, "E, dd MMM yyyy HH:mm:ss O",
276 icu::TimeZone::getGMT());
279 bool TimeDurationFormat(TimeDelta time,
280 DurationFormatWidth width,
281 std::u16string* out) {
283 UErrorCode status = U_ZERO_ERROR;
284 const int total_minutes = ClampRound(time / base::Minutes(1));
285 const int hours = total_minutes / 60;
286 const int minutes = total_minutes % 60;
287 UMeasureFormatWidth u_width = DurationWidthToMeasureWidth(width);
289 // TODO(derat): Delete the |status| checks and LOG(ERROR) calls throughout
290 // this function once the cause of http://crbug.com/677043 is tracked down.
291 const icu::Measure measures[] = {
292 icu::Measure(hours, icu::MeasureUnit::createHour(status), status),
293 icu::Measure(minutes, icu::MeasureUnit::createMinute(status), status)};
294 if (U_FAILURE(status)) {
295 LOG(ERROR) << "Creating MeasureUnit or Measure for " << hours << "h"
296 << minutes << "m failed: " << u_errorName(status);
300 icu::MeasureFormat measure_format(icu::Locale::getDefault(), u_width, status);
301 if (U_FAILURE(status)) {
302 LOG(ERROR) << "Creating MeasureFormat for "
303 << icu::Locale::getDefault().getName()
304 << " failed: " << u_errorName(status);
308 icu::UnicodeString formatted;
309 icu::FieldPosition ignore(icu::FieldPosition::DONT_CARE);
310 measure_format.formatMeasures(measures, 2, formatted, ignore, status);
311 if (U_FAILURE(status)) {
312 LOG(ERROR) << "formatMeasures failed: " << u_errorName(status);
316 *out = i18n::UnicodeStringToString16(formatted);
320 bool TimeDurationFormatWithSeconds(TimeDelta time,
321 DurationFormatWidth width,
322 std::u16string* out) {
324 UErrorCode status = U_ZERO_ERROR;
325 const int64_t total_seconds = ClampRound<int64_t>(time.InSecondsF());
326 const int64_t hours = total_seconds / base::Time::kSecondsPerHour;
327 const int64_t minutes =
328 (total_seconds - hours * base::Time::kSecondsPerHour) /
329 base::Time::kSecondsPerMinute;
330 const int64_t seconds = total_seconds % base::Time::kSecondsPerMinute;
331 UMeasureFormatWidth u_width = DurationWidthToMeasureWidth(width);
333 const icu::Measure measures[] = {
334 icu::Measure(hours, icu::MeasureUnit::createHour(status), status),
335 icu::Measure(minutes, icu::MeasureUnit::createMinute(status), status),
336 icu::Measure(seconds, icu::MeasureUnit::createSecond(status), status)};
337 icu::MeasureFormat measure_format(icu::Locale::getDefault(), u_width, status);
338 icu::UnicodeString formatted;
339 icu::FieldPosition ignore(icu::FieldPosition::DONT_CARE);
340 measure_format.formatMeasures(measures, 3, formatted, ignore, status);
341 *out = i18n::UnicodeStringToString16(formatted);
342 return U_SUCCESS(status);
345 std::u16string DateIntervalFormat(const Time& begin_time,
346 const Time& end_time,
348 UErrorCode status = U_ZERO_ERROR;
350 std::unique_ptr<icu::DateIntervalFormat> formatter(
351 icu::DateIntervalFormat::createInstance(DateFormatToString(format),
354 icu::FieldPosition pos = 0;
355 UDate start_date = ToUDate(begin_time);
356 UDate end_date = ToUDate(end_time);
357 icu::DateInterval interval(start_date, end_date);
358 icu::UnicodeString formatted;
359 formatter->format(&interval, formatted, pos, status);
360 return i18n::UnicodeStringToString16(formatted);
363 HourClockType GetHourClockType() {
364 // TODO(satorux,jshin): Rework this with ures_getByKeyWithFallback()
365 // once it becomes public. The short time format can be found at
366 // "calendar/gregorian/DateTimePatterns/3" in the resources.
367 std::unique_ptr<icu::SimpleDateFormat> formatter(
368 static_cast<icu::SimpleDateFormat*>(
369 icu::DateFormat::createTimeInstance(icu::DateFormat::kShort)));
370 // Retrieve the short time format.
371 icu::UnicodeString pattern_unicode;
372 formatter->toPattern(pattern_unicode);
374 // Determine what hour clock type the current locale uses, by checking
375 // "a" (am/pm marker) in the short time format. This is reliable as "a"
376 // is used by all of 12-hour clock formats, but not any of 24-hour clock
377 // formats, as shown below.
379 // % grep -A4 DateTimePatterns third_party/icu/source/data/locales/*.txt |
380 // grep -B1 -- -- |grep -v -- '--' |
381 // perl -nle 'print $1 if /^\S+\s+"(.*)"/' |sort -u
394 // See http://userguide.icu-project.org/formatparse/datetime for details
395 // about the date/time format syntax.
396 return pattern_unicode.indexOf('a') == -1 ? k24HourClock : k12HourClock;