How to detect Caps lock in Vimrc function

Question

When editing code in Vim, I often use caps lock when writing files to ALL CAPS. However, I often forget to disable the cap lock when I finished with the title part. This does not hurt (as j moves down, but J joins the current line with a line below).

Usually, when I exit insert mode, I want to disable the lock. How can I add something to my .vimrc so that it can disable the header lock when exiting insert mode? Alternatively, how can I add something to my .vimrc so that it alerts me (status bar? Beep? Any warning is ok) if I have a lock lock when I exit insert mode?

Thanks!

Answer 1

Like all other applications, Vim / GVIM sits on top of the abstractions of the terminal / window manager and therefore does not have direct access to the basic functions of the raw keyboard. Therefore, obtaining Caps Lock information will include messy and platform hacks.

Instead, I would suggest using Vim features to “emulate” Caps Lock in Vim, since you don't have the problems you mentioned. Look at the Caps Lock Insertion Only article, which explains this in detail.