How to make a keymap for a series of action atomic (which can be undo by just press one time 'u')?

Question

Here is my keymap:

nmap <A-y> viW<Plug>VSurround]%a()<ESC>h"+pF(<CR>l
vmap <A-y> <Plug>VSurround]%a()<ESC>h"+pF(<CR>l

Which is a markdown link paste helper. It will make the word "Apple" to "[Apple](url in your clipboard)".

It works fine.

But when I want to undo it (change the text back to "Apple") I need press 3 times u which is unconvenient for me.

How to make it atomic (just press one time u)?

I do some search work but cant get related topic.

Answer 1

To have an atomique operation I would avoid 'Surround' and do:

vnoremap <A-y> "ac[<C-r>a](<C-r>+)<Esc>
nmap <A-y> viW<A-y>

It is simple but override the a buffer.

Another solution that doesn't override the a buffer is:

vnoremap <A-y> <Esc>a](<C-r>+)<Esc>gvo<Esc>i[<Esc>
nmap <A-y> viW<A-y>

It uses the visual selection v, the visual reselection gv and the cursor movement around the selection o.