clever way to move words at the end of the line into braces

Question

I repeatedly need to transform

word

into

\edlemvar{word}{}{}

or

\edlemvar{}{}{word}

More generally, it would be great to have a way to do this even if there are more words on the line than "word," something like <count>COMMANDSEQUENCE where <count> is however many words I would like to include in either pair of braces; the rest of the words on the line would then appear on a new line. That is, I'd like to convert (for <count> = 2)

word1 word2 word3 word4

to

\edlemvar{word1 word2}{}{} 
word3 word 4

or

\edlemvar{}{}{word1 word2} 
word3 word 4

Question: Is there some clever way in Vim/Neovim to do either this general transformation with minimal keystrokes?

I use a custom snippet that turns edlv into \edlemvar{}{}{}. But then I still need to type Iedlv<tab><esc>$miwbp to do the first operation, or Iedlv<tab><esc>$miwhP for the second --- and that's just the simple case.

Note: I use cutlass/subversive/yoink. If you don't, please replace m with d.

Answer 1

As per the comments, Ultisnips supports the use of a $VISUAL placeholder to include the recent visual selection in a snippet.

Instead of using <count>{motion}, use {Visual} mode to select the text to be moved inside the braces.

In the snippet definition, tell Ultisnips where to place the visually selected text (if any) with $VISUAL.

That is, instead of

snippet edlv "\edlemvar{}{}{}" 
\edlemvar{${1:one}}{${2:two}}{${3:three}}
$0
endsnippet

we can define

snippet edlv1 "\edlemvar{.}{}{}" 
\edlemvar{${1:${VISUAL:one}}}{${2:two}}{${3:three}}
$0
endsnippet

Now, with the text

word1 word2 word3 word4

and cursor on word1, type v3iw<tab>edlv1<tab> to get

\edlemvar{word1 word2}{two}{three}
 word3 word4

---

Addendum: there is a small annoyance — a space in the start of the second line. I don't have a robust solution right now, but as a workaround, you could select the additional space at the end of word2, and use a transformation, ie.

snippet edlv1t "\edlemvar{.}{}{}" 
\edlemvar{${1:${VISUAL/\s+$//:one}}}{${2:two}}{${3:three}}
$0
endsnippet

and use v4iw<tab>edlv1t<tab> to get the desired result (without the leading space).