> So, yes, it's absolutely impossible to get key up events in tty context, and at this point it will almost certainly stay that way forever, as it's too late to retrofit terminal emulators, drivers, and applications to understand whatever protocol for communicating key up events.
Why would that be? It seems like it would just be a matter of adding another termcap entry for your specific terminal emulator, and hoping other people care enough to start implementing it in theirs.
There's already no particularly consistent standard for most terminal events -- just a database of (I think turing-complete) stack VMs that tell programs how to parse whatever they read from the terminal emulator they're running under. Adding another string-named property to this table that describes key-up events would not be overly difficult.
Why would that be? It seems like it would just be a matter of adding another termcap entry for your specific terminal emulator, and hoping other people care enough to start implementing it in theirs.
There's already no particularly consistent standard for most terminal events -- just a database of (I think turing-complete) stack VMs that tell programs how to parse whatever they read from the terminal emulator they're running under. Adding another string-named property to this table that describes key-up events would not be overly difficult.