How to change the value of timeout for one key command?

Question

What I want

To temporarily change the timeout value for certain key commands

Where I've looked

From :help 'timeout' I have :

The timeout only happens when the 'timeout' and 'ttimeout' options
tell so.  A useful setting would be >
    :set timeout timeoutlen=3000 ttimeoutlen=100
(time out on mapping after three seconds, time out on key codes after
a tenth of a second).

I'm not sure how I would implement this in a key command though, or how to check the current setting of timeout.

For example, I wanted to try and set hh to go to the start of a line, but I wanted the timeout for that particular key command to be pretty quick, say 100 milliseconds.

What I've tried

:set timeout timeoutlen=100 ttimeoutlen=100
nmap hh <S-^>
:set timeoutlen=1000 ttimeoutlen=1000

Answer 1

The 'timeoutlen' option is a global one, and it applies at mapping invocation, not during definition.

I can understand your motivation (using a special hh mapping while still being able to quickly move via h, h), but I would nonetheless advise against such tricks. Better choose another mapping that doesn't overlap with a built-in command.

If you really must, have a look at the arpeggio plugin. It performs some tricks to map simultaneously pressed keys.