codekingpro/portable-devtools

1" Vim indent file2" Language: PoV-Ray Scene Description Language3" Maintainer: David Necas (Yeti) <yeti@physics.muni.cz>4" Last Change: 2017 Jun 135"              2022 April: b:undo_indent added by Doug Kearns6" URI: http://trific.ath.cx/Ftp/vim/indent/pov.vim7 8" Only load this indent file when no other was loaded.9if exists("b:did_indent")10  finish11endif12let b:did_indent = 113 14" Some preliminary settings.15setlocal nolisp " Make sure lisp indenting doesn't supersede us.16 17setlocal indentexpr=GetPoVRayIndent()18setlocal indentkeys+==else,=end,0]19 20let b:undo_indent = "setl inde< indk< lisp<"21 22" Only define the function once.23if exists("*GetPoVRayIndent")24  finish25endif26 27" Counts matches of a regexp <rexp> in line number <line>.28" Doesn't count matches inside strings and comments (as defined by current29" syntax).30function! s:MatchCount(line, rexp)31  let str = getline(a:line)32  let i = 033  let n = 034  while i >= 035    let i = matchend(str, a:rexp, i)36    if i >= 0 && synIDattr(synID(a:line, i, 0), "name") !~? "string\|comment"37      let n = n + 138    endif39  endwhile40  return n41endfunction42 43" The main function.  Returns indent amount.44function GetPoVRayIndent()45  " If we are inside a comment (may be nested in obscure ways), give up46  if synIDattr(synID(v:lnum, indent(v:lnum)+1, 0), "name") =~? "string\|comment"47    return -148  endif49 50  " Search backwards for the first non-empty, non-comment line.51  let plnum = prevnonblank(v:lnum - 1)52  let plind = indent(plnum)53  while plnum > 0 && synIDattr(synID(plnum, plind+1, 0), "name") =~? "comment"54    let plnum = prevnonblank(plnum - 1)55    let plind = indent(plnum)56  endwhile57 58  " Start indenting from zero59  if plnum == 060    return 061  endif62 63  " Analyse previous nonempty line.64  let chg = 065  let chg = chg + s:MatchCount(plnum, '[[{(]')66  let chg = chg + s:MatchCount(plnum, '#\s*\%(if\|ifdef\|ifndef\|switch\|while\|macro\|else\)\>')67  let chg = chg - s:MatchCount(plnum, '#\s*end\>')68  let chg = chg - s:MatchCount(plnum, '[]})]')69  " Dirty hack for people writing #if and #else on the same line.70  let chg = chg - s:MatchCount(plnum, '#\s*\%(if\|ifdef\|ifndef\|switch\)\>.*#\s*else\>')71  " When chg > 0, then we opened groups and we should indent more, but when72  " chg < 0, we closed groups and this already affected the previous line,73  " so we should not dedent.  And when everything else fails, scream.74  let chg = chg > 0 ? chg : 075 76  " Analyse current line77  " FIXME: If we have to dedent, we should try to find the indentation of the78  " opening line.79  let cur = s:MatchCount(v:lnum, '^\s*\%(#\s*\%(end\|else\)\>\|[]})]\)')80  if cur > 081    let final = plind + (chg - cur) * shiftwidth()82  else83    let final = plind + chg * shiftwidth()84  endif85 86  return final < 0 ? 0 : final87endfunction88