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Cache calendar tooltip text to reduce computations.

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This commit is contained in:
Skirmantas Kligys 2020-02-02 14:44:26 -08:00
parent ea9591baea
commit f6b2005687
1 changed files with 23 additions and 1 deletions
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24
src/modules/clock.cpp
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@ -1,4 +1,5 @@
#include "modules/clock.hpp"
#include <mutex>
#include <sstream>
using zoned_time = date::zoned_time<std::chrono::system_clock::duration>;
@ -26,9 +27,28 @@ void weekdays_header(const std::locale& locale, const date::weekday& 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_;
}
};
std::mutex cached_calendar_mutex; // protects cached_calendar.
CachedCalendar cached_calendar;
std::string calendar_text(const waybar_time& wtime, const date::weekday& first_dow) {
const auto daypoint = date::floor<date::days>(wtime.ztime.get_local_time());
const auto ymd = date::year_month_day(daypoint);
const std::lock_guard<std::mutex> lock(cached_calendar_mutex);
if (cached_calendar.ymd == ymd) {
return cached_calendar.text;
}
const date::year_month ym(ymd.year(), ymd.month());
const auto curr_day = ymd.day();
@ -63,7 +83,9 @@ std::string calendar_text(const waybar_time& wtime, const date::weekday& first_d
}
}
return os.str();
auto result = os.str();
cached_calendar.set(ymd, result);
return result;
}
}