vimtex: fully indent a '{ ... }' block

Question

Concerning indent in vimtex, it has some settings controlling indenting of delimiters, the option seems to be g:vimtex_indent_delims. However, I would like to not only indent the text between opening and closing braces, but also the braces themselves, leading to a layout like

\cs_new:Npn \__hook_parse_dot_label:n #1
  {
    \tl_if_empty:nTF {#1}
      {
        \msg_expandable_error:nn { hooks } { empty-label }
        \__hook_currname_or_default:
      }
      {
        \str_if_eq:nnTF {#1} { . }
          { \__hook_currname_or_default: }
          { \__hook_parse_dot_label:w #1 ./ \s__hook_mark }
      }
  }

(this is example code taken from the lthooks package.) So additional to the usual indenting of the lines in the {...} block, also the braces themselves should be indented.

From what I can see, there is, however, no such option in g:vimtex_indent_delims.

How can I achieve such an indent in vimtex? Is there some other place in the documentation with aprropriate settings you can refer me to?

Answer 1

From what I can see, there is, however, no such option in g:vimtex_indent_delims.

Correct. VimTeX does not support this style of indentation. There is a semi related option g:vimtex_indent_delims.close_indented that allows to keep the closing delimiter indented, but there is no option to add indent to the opening delimiter.

I do not plan to add support for this, either. I find it quite hard to write good and robust indentation scripts, and I believe the current indentation of VimTeX is quite good and robust. Adding support for what you ask for would possibly be very hard to do in a robust manner. Feel free to prove me wrong by submitting a pull request with a proof of concept - I'll be happy to accept it if I believe it works well without breaking any current behaviour.