Aw: Re: Numeric codes of non-standard function keys

[Anton Vidovic]

Hello,

> > to 568 (kUP7)? Are those used as bitmasks for the modifiers
> > Ctrl, Shift and Alt?

> ncurses doesn't do anything with modifiers.  Unlike PDCurses which
> deals with systems that provide that information, curses is more
> general.  Not everything is xterm or something that copies from xterm.
>
> The key definitions for modified keys are named according to a convention.
> Those names are described in user_caps(5).

I have noticed that for xterm and xterm-like emulators, the extended 
capabilities in terminfo descriptions include modifiers but only up to the 
value "7", which corresponds to Alt+Control, as described here:

https://invisible-island.net/ncurses/man/user_caps.5.html
https://invisible-island.net/xterm/terminfo.html
https://www.invisible-island.net/xterm/xterm-function-keys.html

Is there a reason why the combination of all three modifiers, Shift+Alt+Control 
has not been included in the terminfo description, which leads to ncurses not 
automatically generating the corresponding key code, even though the terminal 
does send the correct sequence, for example ^[[1;8C for Ctrl-Alt-Shift-Right, 
which would be kRIT8?

How would a ncurses application check for the availability of that key if the 
terminfo does not advertize it?

Kind regards,
Anton