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" Vim indent file
" Language: Mathematica
" Maintainer: Steve Layland <layland@wolfram.com> (Invalid email address)
" Doug Kearns <dougkearns@gmail.com>
" Last Change: Sat May 10 18:56:22 CDT 2005
" 2022 April: b:undo_indent added by Doug Kearns
" Source: http://vim.sourceforge.net/scripts/script.php?script_id=1274
" http://members.wolfram.com/layland/vim/indent/mma.vim
"
" NOTE:
" Empty .m files will automatically be presumed to be Matlab files
" unless you have the following in your .vimrc:
"
" let filetype_m="mma"
"
" Credits:
" o steve hacked this out of a random indent file in the Vim 6.1
" distribution that he no longer remembers...sh.vim? Thanks!
" Only load this indent file when no other was loaded.
if exists("b:did_indent")
finish
endif
let b:did_indent = 1
setlocal indentexpr=GetMmaIndent()
setlocal indentkeys+=0[,0],0(,0)
setlocal nosi "turn off smart indent so we don't over analyze } blocks
let b:undo_indent = "setl inde< indk< si<"
if exists("*GetMmaIndent")
finish
endif
function GetMmaIndent()
" Hit the start of the file, use zero indent.
if v:lnum == 0
return 0
endif
" Find a non-blank line above the current line.
let lnum = prevnonblank(v:lnum - 1)
" use indenting as a base
let ind = indent(v:lnum)
let lnum = v:lnum
" if previous line has an unmatched bracket, or ( indent.
" doesn't do multiple parens/blocks/etc...
" also, indent only if this line if this line isn't starting a new
" block... TODO - fix this with indentkeys?
if getline(v:lnum-1) =~ '\\\@<!\%(\[[^\]]*\|([^)]*\|{[^}]*\)$' && getline(v:lnum) !~ '\s\+[\[({]'
let ind = ind+shiftwidth()
endif
" if this line had unmatched closing block,
" indent to the matching opening block
if getline(v:lnum) =~ '[^[]*]\s*$'
" move to the closing bracket
call search(']','bW')
" and find its partner's indent
let ind = indent(searchpair('\[','',']','bWn'))
" same for ( blocks
elseif getline(v:lnum) =~ '[^(]*)$'
call search(')','bW')
let ind = indent(searchpair('(','',')','bWn'))
" and finally, close { blocks if si ain't already set
elseif getline(v:lnum) =~ '[^{]*}'
call search('}','bW')
let ind = indent(searchpair('{','','}','bWn'))
endif
return ind
endfunction
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