waybar/include/util/waybar_time.hpp
2022-04-06 08:37:19 +02:00

40 lines
849 B
C++

#pragma once
#include <date/tz.h>
#include <fmt/format.h>
namespace waybar {
struct waybar_time {
std::locale locale;
date::zoned_seconds ztime;
};
} // namespace waybar
template <>
struct fmt::formatter<waybar::waybar_time> {
std::string_view specs;
template <typename ParseContext>
constexpr auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
auto it = ctx.begin();
if (it != ctx.end() && *it == ':') {
++it;
}
auto end = it;
while (end != ctx.end() && *end != '}') {
++end;
}
if (end != it) {
specs = {it, std::string_view::size_type(end - it)};
}
return end;
}
template <typename FormatContext>
auto format(const waybar::waybar_time& t, FormatContext& ctx) {
return format_to(ctx.out(), "{}", date::format(t.locale, fmt::to_string(specs), t.ztime));
}
};