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Cache calendar per clock instance, weekdays properly handle locales.

This commit is contained in:
Skirmantas Kligys 2020-02-05 11:02:42 -08:00
parent 3c268d83c2
commit d1f427618f
3 changed files with 101 additions and 95 deletions
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11
include/modules/clock.hpp
View File

@ -12,6 +12,11 @@
namespace waybar::modules { namespace waybar::modules {
struct waybar_time {
std::locale locale;
date::zoned_time<std::chrono::system_clock::duration> ztime;
};
class Clock : public ALabel { class Clock : public ALabel {
public: public:
Clock(const std::string&, const Json::Value&); Clock(const std::string&, const Json::Value&);
@ -23,6 +28,12 @@ class Clock : public ALabel {
std::locale locale_; std::locale locale_;
const date::time_zone* time_zone_; const date::time_zone* time_zone_;
bool fixed_time_zone_; bool fixed_time_zone_;
date::year_month_day cached_calendar_ymd_;
std::string cached_calendar_text_;
auto calendar_text(const waybar_time& wtime) -> std::string;
auto weekdays_header(const date::weekday& first_dow, std::ostream& os) -> void;
auto first_day_of_week() -> date::weekday;
}; };
} // namespace waybar::modules } // namespace waybar::modules

10
meson.build
View File

@ -42,11 +42,15 @@ if not compiler.has_header('filesystem')
endif endif
endif endif
code = '''#include<langinfo.h> code = '''
#include <langinfo.h>
#include <locale.h>
int main(int argc, char** argv) { int main(int argc, char** argv) {
locale_t locale = newlocale(LC_ALL, "en_US.UTF-8", nullptr);
char* str; char* str;
str = nl_langinfo(_NL_TIME_WEEK_1STDAY); str = nl_langinfo_l(_NL_TIME_WEEK_1STDAY, locale);
str = nl_langinfo(_NL_TIME_FIRST_WEEKDAY); str = nl_langinfo_l(_NL_TIME_FIRST_WEEKDAY, locale);
freelocale(locale);
return 0; return 0;
} }
''' '''

175
src/modules/clock.cpp
View File

@ -1,101 +1,12 @@
#include "modules/clock.hpp" #include "modules/clock.hpp"
#include <sstream> #include <sstream>
#include <type_traits>
#ifdef HAVE_LANGINFO_1STDAY #ifdef HAVE_LANGINFO_1STDAY
#include <langinfo.h> #include <langinfo.h>
#include <locale.h>
#endif #endif
using zoned_time = date::zoned_time<std::chrono::system_clock::duration>; using waybar::modules::waybar_time;
struct waybar_time {
std::locale locale;
zoned_time ztime;
};
namespace {
#ifdef HAVE_LANGINFO_1STDAY
// Computations done similarly to Linux cal utility.
date::weekday first_day_of_week() {
const int i = (std::intptr_t) nl_langinfo(_NL_TIME_WEEK_1STDAY);
auto ymd = date::year(i / 10000)/(i / 100 % 100)/(i % 100);
auto wd = date::weekday(ymd);
uint8_t j = *nl_langinfo(_NL_TIME_FIRST_WEEKDAY);
return wd + date::days(j - 1);
}
#endif
void weekdays_header(const std::locale& locale, const date::weekday& first_dow, std::ostream& os) {
auto wd = first_dow;
do {
if (wd != first_dow) os << ' ';
Glib::ustring wd_ustring(date::format(locale, "%a", wd));
auto wd_len = wd_ustring.length();
if (wd_len > 2) {
wd_ustring = wd_ustring.substr(0, 2);
wd_len = 2;
}
const std::string pad(2 - wd_len, ' ');
os << pad << wd_ustring;
} while (++wd != first_dow);
os << "\n";
}
struct CachedCalendar {
date::year_month_day ymd;
std::string text;
void set(const date::year_month_day& ymd_, std::string text_) {
ymd = ymd_;
text = text_;
}
};
CachedCalendar cached_calendar;
std::string calendar_text(const waybar_time& wtime) {
const auto daypoint = date::floor<date::days>(wtime.ztime.get_local_time());
const auto ymd = date::year_month_day(daypoint);
if (cached_calendar.ymd == ymd) {
return cached_calendar.text;
}
const date::year_month ym(ymd.year(), ymd.month());
const auto curr_day = ymd.day();
std::stringstream os;
#ifdef HAVE_LANGINFO_1STDAY
const auto first_dow = first_day_of_week();
#else
const auto first_dow = date::Sunday;
#endif
weekdays_header(wtime.locale, first_dow, os);
// First week prefixed with spaces if needed.
auto wd = date::weekday(ym/1);
auto empty_days = (wd - first_dow).count();
if (empty_days > 0) {
os << std::string(empty_days * 3 - 1, ' ');
}
auto last_day = (ym/date::literals::last).day();
for (auto d = date::day(1); d <= last_day; ++d, ++wd) {
if (wd != first_dow) {
os << ' ';
} else if (unsigned(d) != 1) {
os << '\n';
}
if (d == curr_day) {
os << "<b><u>" << date::format("%e", d) << "</u></b>";
} else {
os << date::format("%e", d);
}
}
auto result = os.str();
cached_calendar.set(ymd, result);
return result;
}
}
waybar::modules::Clock::Clock(const std::string& id, const Json::Value& config) waybar::modules::Clock::Clock(const std::string& id, const Json::Value& config)
: ALabel(config, "clock", id, "{:%H:%M}", 60) : ALabel(config, "clock", id, "{:%H:%M}", 60)
@ -144,6 +55,86 @@ auto waybar::modules::Clock::update() -> void {
} }
} }
auto waybar::modules::Clock::calendar_text(const waybar_time& wtime) -> std::string {
const auto daypoint = date::floor<date::days>(wtime.ztime.get_local_time());
const auto ymd = date::year_month_day(daypoint);
if (cached_calendar_ymd_ == ymd) {
return cached_calendar_text_;
}
const date::year_month ym(ymd.year(), ymd.month());
const auto curr_day = ymd.day();
std::stringstream os;
const auto first_dow = first_day_of_week();
weekdays_header(first_dow, os);
// First week prefixed with spaces if needed.
auto wd = date::weekday(ym/1);
auto empty_days = (wd - first_dow).count();
if (empty_days > 0) {
os << std::string(empty_days * 3 - 1, ' ');
}
auto last_day = (ym/date::literals::last).day();
for (auto d = date::day(1); d <= last_day; ++d, ++wd) {
if (wd != first_dow) {
os << ' ';
} else if (unsigned(d) != 1) {
os << '\n';
}
if (d == curr_day) {
os << "<b><u>" << date::format("%e", d) << "</u></b>";
} else {
os << date::format("%e", d);
}
}
auto result = os.str();
cached_calendar_ymd_ = ymd;
cached_calendar_text_ = result;
return result;
}
auto waybar::modules::Clock::weekdays_header(const date::weekday& first_dow, std::ostream& os) -> void {
auto wd = first_dow;
do {
if (wd != first_dow) os << ' ';
Glib::ustring wd_ustring(date::format(locale_, "%a", wd));
auto wd_len = wd_ustring.length();
if (wd_len > 2) {
wd_ustring = wd_ustring.substr(0, 2);
wd_len = 2;
}
const std::string pad(2 - wd_len, ' ');
os << pad << wd_ustring;
} while (++wd != first_dow);
os << "\n";
}
#ifdef HAVE_LANGINFO_1STDAY
template <auto fn>
using deleter_from_fn = std::integral_constant<decltype(fn), fn>;
template <typename T, auto fn>
using deleting_unique_ptr = std::unique_ptr<T, deleter_from_fn<fn>>;
#endif
// Computations done similarly to Linux cal utility.
auto waybar::modules::Clock::first_day_of_week() -> date::weekday {
#ifdef HAVE_LANGINFO_1STDAY
deleting_unique_ptr<std::remove_pointer<locale_t>::type, freelocale>
posix_locale{newlocale(LC_ALL, locale_.name().c_str(), nullptr)};
if (posix_locale) {
const int i = (std::intptr_t) nl_langinfo_l(_NL_TIME_WEEK_1STDAY, posix_locale.get());
auto ymd = date::year(i / 10000)/(i / 100 % 100)/(i % 100);
auto wd = date::weekday(ymd);
uint8_t j = *nl_langinfo_l(_NL_TIME_FIRST_WEEKDAY, posix_locale.get());
return wd + date::days(j - 1);
}
#endif
return date::Sunday;
}
template <> template <>
struct fmt::formatter<waybar_time> : fmt::formatter<std::tm> { struct fmt::formatter<waybar_time> : fmt::formatter<std::tm> {
template <typename FormatContext> template <typename FormatContext>