runtime(typst): Add typst runtime files
closes: #15234
Signed-off-by: Gregory Anders <greg@gpanders.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/autoload/typst.vim b/runtime/autoload/typst.vim
new file mode 100644
index 0000000..55edd23
--- /dev/null
+++ b/runtime/autoload/typst.vim
@@ -0,0 +1,50 @@
+" Language: Typst
+" Maintainer: Gregory Anders
+" Last Change: 2024-07-14
+" Based on: https://github.com/kaarmu/typst.vim
+
+function! typst#indentexpr() abort
+ let l:lnum = v:lnum
+ let s:sw = shiftwidth()
+
+ let [l:plnum, l:pline] = s:get_prev_nonblank(l:lnum - 1)
+ if l:plnum == 0 | return 0 | endif
+
+ let l:line = getline(l:lnum)
+ let l:ind = indent(l:plnum)
+
+ let l:synname = synIDattr(synID(l:lnum, 1, 1), 'name')
+
+ " Use last indent for block comments
+ if l:synname == 'typstCommentBlock'
+ return l:ind
+ endif
+
+ if l:pline =~ '\v[{[(]\s*$'
+ let l:ind += s:sw
+ endif
+
+ if l:line =~ '\v^\s*[}\])]'
+ let l:ind -= s:sw
+ endif
+
+ return l:ind
+endfunction
+
+" Gets the previous non-blank line that is not a comment.
+function! s:get_prev_nonblank(lnum) abort
+ let l:lnum = prevnonblank(a:lnum)
+ let l:line = getline(l:lnum)
+
+ while l:lnum > 0 && l:line =~ '^\s*//'
+ let l:lnum = prevnonblank(l:lnum - 1)
+ let l:line = getline(l:lnum)
+ endwhile
+
+ return [l:lnum, s:remove_comments(l:line)]
+endfunction
+
+" Removes comments from the given line.
+function! s:remove_comments(line) abort
+ return substitute(a:line, '\s*//.*', '', '')
+endfunction