" Vim indent file " Language: PoV-Ray Scene Description Language " Maintainer: David Necas (Yeti) " Last Change: 2002-10-20 " URI: http://trific.ath.cx/Ftp/vim/indent/pov.vim " Only load this indent file when no other was loaded. if exists("b:did_indent") finish endif let b:did_indent = 1 " Some preliminary settings. setlocal nolisp " Make sure lisp indenting doesn't supersede us. setlocal indentexpr=GetPoVRayIndent() setlocal indentkeys+==else,=end,0] " Only define the function once. if exists("*GetPoVRayIndent") finish endif " Counts matches of a regexp in line number . " Doesn't count matches inside strings and comments (as defined by current " syntax). function! s:MatchCount(line, rexp) let str = getline(a:line) let i = 0 let n = 0 while i >= 0 let i = matchend(str, a:rexp, i) if i >= 0 && synIDattr(synID(a:line, i, 0), "name") !~? "string\|comment" let n = n + 1 endif endwhile return n endfunction " The main function. Returns indent amount. function GetPoVRayIndent() " If we are inside a comment (may be nested in obscure ways), give up if synIDattr(synID(v:lnum, indent(v:lnum)+1, 0), "name") =~? "string\|comment" return -1 endif " Search backwards for the frist non-empty, non-comment line. let plnum = prevnonblank(v:lnum - 1) let plind = indent(plnum) while plnum > 0 && synIDattr(synID(plnum, plind+1, 0), "name") =~? "comment" let plnum = prevnonblank(plnum - 1) let plind = indent(plnum) endwhile " Start indenting from zero if plnum == 0 return 0 endif " Analyse previous nonempty line. let chg = 0 let chg = chg + s:MatchCount(plnum, '[[{(]') let chg = chg + s:MatchCount(plnum, '#\s*\%(if\|ifdef\|ifndef\|switch\|while\|macro\|else\)\>') let chg = chg - s:MatchCount(plnum, '#\s*end\>') let chg = chg - s:MatchCount(plnum, '[]})]') " Dirty hack for people writing #if and #else on the same line. let chg = chg - s:MatchCount(plnum, '#\s*\%(if\|ifdef\|ifndef\|switch\)\>.*#\s*else\>') " When chg > 0, then we opened groups and we should indent more, but when " chg < 0, we closed groups and this already affected the previous line, " so we should not dedent. And when everything else fails, scream. let chg = chg > 0 ? chg : 0 " Analyse current line " FIXME: If we have to dedent, we should try to find the indentation of the " opening line. let cur = s:MatchCount(v:lnum, '^\s*\%(#\s*\%(end\|else\)\>\|[]})]\)') if cur > 0 let final = plind + (chg - cur) * &sw else let final = plind + chg * &sw endif return final < 0 ? 0 : final endfunction