" Vim indent file
" Language: CSS
" Maintainer: Nikolai Weibull <[email protected]>
" Latest Revision: 2012-05-30

if exists("b:did_indent")
finish
endif
let b:did_indent = 1

setlocal indentexpr=GetCSSIndent()
setlocal indentkeys=0{,0},!^F,o,O
setlocal nosmartindent

let b:undo_indent = "setl smartindent< indentkeys< indentexpr<"

if exists("*GetCSSIndent")
finish
endif
let s:keepcpo= &cpo
set cpo&vim

function s:prevnonblanknoncomment(lnum)
let lnum = a:lnum
while lnum > 1
let lnum = prevnonblank(lnum)
let line = getline(lnum)
if line =~ '\*/'
while lnum > 1 && line !~ '/\*'
let lnum -= 1
endwhile
if line =~ '^\s*/\*'
let lnum -= 1
else
break
endif
else
break
endif
endwhile
return lnum
endfunction

function s:count_braces(lnum, count_open)
let n_open = 0
let n_close = 0
let line = getline(a:lnum)
let pattern = '[{}]'
let i = match(line, pattern)
while i != -1
if synIDattr(synID(a:lnum, i + 1, 0), 'name') !~ 'css\%(Comment\|StringQ\{1,2}\)'
if line[i] == '{'
let n_open += 1
elseif line[i] == '}'
if n_open > 0
let n_open -= 1
else
let n_close += 1
endif
endif
endif
let i = match(line, pattern, i + 1)
endwhile
return a:count_open ? n_open : n_close
endfunction

function GetCSSIndent()
let line = getline(v:lnum)
if line =~ '^\s*\*'
return cindent(v:lnum)
endif

let pnum = s:prevnonblanknoncomment(v:lnum - 1)
if pnum == 0
return 0
endif

return indent(pnum) + s:count_braces(pnum, 1) * &sw
\ - s:count_braces(v:lnum, 0) * &sw
endfunction

let &cpo = s:keepcpo
unlet s:keepcpo