vimtex: configure to indent '[ ... ]' and '\[ ... \]' blocks

Question

When setting indentation using vimtex, I meet some problem. I set the option g:vimtex_indent_delims to indent [...] blocks.

let g:vimtex_indent_delims = {
      \ 'open'  : ['{','(','['],
      \ 'close' : ['}',')',']'],
      \}

But then the \[...\] block will indent twice. What I get is the following.

\[
        f(x)
\]
[
    f(x)
]

Compared with this, there is no problem for {...} and \{...\} blocks, or (...) and \(...\) blocks.

\{
    f(x)
\}
{
    f(x)
}
\(
    f(x)
\)
(
    f(x)
)

So, is it possible to indent [...] blocks, while indent \[...\] blocks only one time?

Answer 1

You need to specify regexes that do not match on \[ and \]. This should work:

let g:vimtex_indent_delims = {
      \ 'open'  : ['{', '(', vimtex#re#not_bslash . '['],
      \ 'close' : ['}', ')', vimtex#re#not_bslash . ']'],
      \}

The vimtex#re#bslash is a regex that matches whenever the preceding atom is not a single backslash.