Let nCurses handle UTF8 character by terminal

Question

Ncurses have whole family of print functions for wide characters: https://linux.die.net/man/3/mvwaddnwstr

The problem with those is that it depends glibc, so if some UTF-8 character were yet not added to glibc those won't be printed properly example is: ✅

The solution I can see is to let ncurses handle displaying the character by "terminal", what I mean by that is that if we would have some sort of print function that would accept hex UTF-8 string and let terminal find correct font like below snippet do:

#include <iostream>
#include <unistd.h>

int main()
{
    write(1, "\xe2\x9c\x85", 9);
}

Is is possible with nCurses?

related? https://stackoverflow.com/questions/19373027/how-can-i-print-ﾟヮﾟ-with-ncurses — Daniel A. White, Oct 10 '21 at 00:11
Nope my problem is not that I don’t know how to print UTF8 with ncurses but with the fact that ncurses just won’t print all UTF8 characters correctly if those are not added to current glibc version — Mateusz Wojtczak, Oct 10 '21 at 00:23
Yes wide form and proper locale and most of wide characters works fine but some don’t like the one I have posted — Mateusz Wojtczak, Oct 10 '21 at 00:28
If the width of a character isn't known, ncurses will ignore it. You'll have to learn how to configure locale data in glibc if you want a solution. — Thomas Dickey, Oct 10 '21 at 00:28
Exactly and for this one is -1 but is there a way I can do stuff in ncurses to print char by letting terminal figure out the font like in my example — Mateusz Wojtczak, Oct 10 '21 at 00:31
@ThomasDickey can you give some more info what do you mean by " learn how to configure locale data in glibc" ? — Mateusz Wojtczak, Oct 10 '21 at 01:52
There's an example of what's needed here: https://stackoverflow.com/a/23533623/1566221 — rici, Oct 10 '21 at 02:36
By the way, ncurses *does* rely on whatever terminal emulator you use to find fonts and render them. All it needs is the wcwidth so that it can predict how much space the character will occupy. — rici, Oct 10 '21 at 02:41

Let nCurses handle UTF8 character by terminal

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