An easier (or friendlier) way to write text object

Question

Text objects are one of the power of Vim that I particulary like.

I wanted to create my personnal text object with the p (="previous") and n (="next") parameters. For instance if I type din) (="delete in next closing parenthesis") vim will look for the next parenthesis (even if it's in another line below) and delete it's content.

It is simple when I want to reach the previous/next parenthesis wich is in the same line as my cursor:

"Point the previous parenthesis
onoremap ip) :<C-U>normal! F(vi(<CR>

"Point the next parenthesis
onoremap in) :<C-U>normal! f(vi(<CR>

But the problems come when I want to modifie those mapping to extend the search outside of the line.

I finally found an alternative with this structure (onoremap [keys] :[search] | [selection]<CR>):

"Point the previous parenthesis
onoremap ip) :<C-U>call search('(','b')<Space><Bar><Space>normal! lvi)<CR>

"Point the next parenthesis
onoremap in) :<C-U>call search('(')<Space><Bar><Space>normal! lvi)<CR>

But I have to use the "search()" function because the "/" command doesn't seem to work.
I also need to use "<Space><Bar><Space>" to combine two commands (work as "|").
I see that using "<C-U>" right after ":" can avoid some border effect here .

My question:
Is there a user-friendly way (a shorter and more readable answer) to do the same kind of mapping?

Personnally, text object is one of my favorite vim feature and I think it's a bit sad to struggle doing a mapping "on the fly" (but now I know that way, I can reproduce that without any problem).

Answer 1

Thanks to the comments and the documentation, I found some solutions.

Using "\|"

No need to use <Space><Bar><Space>, the bar is recognized when a \ is put before:

"Point the previous parenthesis
onoremap ip) :<C-U>call search('(','b') \| normal! lvi)<CR>

"Point the next parenthesis
onoremap in) :<C-U>call search('(') \| normal! lvi)<CR>

Using a range

Some commands in the command-line mode can accept a range. Fortunately, there are the /{pattern}[/] and ?{pattern}[?] range that look for the previous/next line that match a specified {pattern} (see :help :range):

"Point the previous parenthesis
onoremap ip) :<C-U>?(?normal! f(vi)<CR>

"Point the next parenthesis
onoremap in) :<C-U>/(/normal! f(vi)<CR>

Unfortunately, those mapping won't work for parenthesis in the same line as the cursor.

Perhaps I will find some other ways to do so but now it is better. Thanks