" MetaPost indent file" Language:	MetaPost" Maintainer:	Eugene Minkovskii <emin@mccme.ru>" Last Change:	2003 Nov 21" Version: 0.1" ========================================================================== " Identation Rules: {{{1" First of all, MetaPost language don't expect any identation rules." This screept need for you only if you (not MetaPost) need to do" exactly code. If you don't need to use indentation, see" :help filetype-indent-off"" Note: Every rules of identation in MetaPost or TeX languages (and in some" other of course) is very subjective. I can release only my vision of this" promlem."" .........................................................................." Example of correct (by me) identation {{{2" shiftwidth=4" ==========================================================================" for i=0 upto 99:"     z[i] = (0,1u) rotated (i*360/100);" endfor" draw z0 -- z10 -- z20"         withpen ...     % <- 2sw because breaked line"         withcolor ...;  % <- same as previous" draw z0 for i=1 upto 99:"             -- z[i]             % <- 1sw from left end of 'for' satement"         endfor withpen ...      % <- 0sw from left end of 'for' satement"                 withcolor ...;  % <- 2sw because breaked line" draw if One:     % <- This is internal if (like 'for' above)"          one"      elsif Other:"          other"      fi withpen ...;" if one:          % <- This is external if"     draw one;" elseif other:"     draw other;" fi" draw z0; draw z1;" }}}" }}} " Only load this indent file when no other was loaded.if exists("b:did_indent")  finishendiflet b:did_indent = 1 setlocal indentexpr=GetMetaPostIndent()setlocal indentkeys+=;,<:>,=if,=for,=def,=end,=else,=fi " Only define the function once.if exists("*GetMetaPostIndent")  finishendif " Auxiliary Definitions: {{{1function! MetaNextNonblankNoncomment(pos)  " Like nextnonblank() but ignore comment lines  let tmp = nextnonblank(a:pos)  while tmp && getline(tmp) =~ '^\s*%'    let tmp = nextnonblank(tmp+1)  endwhile  return tmpendfunction function! MetaPrevNonblankNoncomment(pos)  " Like prevnonblank() but ignore comment lines  let tmp = prevnonblank(a:pos)  while tmp && getline(tmp) =~ '^\s*%'    let tmp = prevnonblank(tmp-1)  endwhile  return tmpendfunction function! MetaSearchNoncomment(pattern, ...)  " Like search() but ignore commented areas  if a:0    let flags = a:1  elseif &wrapscan    let flags = "w"  else    let flags = "W"  endif  let cl  = line(".")  let cc  = col(".")  let tmp = search(a:pattern, flags)  while tmp && synIDattr(synID(line("."), col("."), 1), "name") =~        \ 'm[fp]\(Comment\|TeXinsert\|String\)'    let tmp = search(a:pattern, flags)  endwhile  if !tmp    call cursor(cl,cc)  endif  return tmpendfunction" }}} function! GetMetaPostIndent()  " not indent in comment ???  if synIDattr(synID(line("."), col("."), 1), "name") =~        \ 'm[fp]\(Comment\|TeXinsert\|String\)'    return -1  endif  " Some RegExps: {{{1  " end_of_item: all of end by ';'  "            + all of end by :endfor, :enddef, :endfig, :endgroup, :fi  "            + all of start by :beginfig(num), :begingroup  "            + all of start by :for, :if, :else, :elseif and end by ':'  "            + all of start by :def, :vardef             and end by '='  let end_of_item = '\('                              .        \ ';\|'                                       .        \ '\<\(end\(for\|def\|fig\|group\)\|fi\)\>\|' .        \ '\<begin\(group\>\|fig\s*(\s*\d\+\s*)\)\|'  .        \ '\<\(for\|if\|else\(if\)\=\)\>.\+:\|'       .        \ '\<\(var\)\=def\>.\+='                      . '\)'  " }}}  " Save: current position {{{1  let cl = line   (".")  let cc = col    (".")  let cs = getline(".")  " if it is :beginfig or :endfig use zero indent  if  cs =~ '^\s*\(begin\|end\)fig\>'    return 0  endif  " }}}  " Initialise: ind variable {{{1  " search previous item not in current line  let p_semicol_l = MetaSearchNoncomment(end_of_item,"bW")  while p_semicol_l == cl    let p_semicol_l = MetaSearchNoncomment(end_of_item,"bW")  endwhile  " if this is first item in program use zero indent  if !p_semicol_l    return 0  endif  " if this is multiline item, remember first indent  if MetaNextNonblankNoncomment(p_semicol_l+1) < cl    let ind = indent(MetaNextNonblankNoncomment(p_semicol_l+1))  " else --- search pre-previous item for search first line in previous item  else    " search pre-previous item not in current line    let pp_semicol_l = MetaSearchNoncomment(end_of_item,"bW")    while pp_semicol_l == p_semicol_l      let pp_semicol_l = MetaSearchNoncomment(end_of_item,"bW")    endwhile    " if we find pre-previous item, remember indent of previous item    " else --- remember zero    if pp_semicol_l      let ind = indent(MetaNextNonblankNoncomment(line(".")+1))    else      let ind = 0    endif  endif  " }}}  " Increase Indent: {{{1  " if it is an internal/external :for or :if statements {{{2  let pnn_s = getline(MetaPrevNonblankNoncomment(cl-1))  if  pnn_s =~ '\<\(for\|if\)\>.\+:\s*\($\|%\)'    let ind = match(pnn_s, '\<\(for\|if\)\>.\+:\s*\($\|%\)') + &sw  " }}}  " if it is a :def, :vardef, :beginfig, :begingroup, :else, :elseif {{{2  elseif pnn_s =~ '^\s*\('                       .        \ '\(var\)\=def\|'                       .        \ 'begin\(group\|fig\s*(\s*\d\+\s*)\)\|' .        \ 'else\(if\)\='                         . '\)\>'    let ind = ind + &sw  " }}}  " if it is a broken line {{{2  elseif pnn_s !~ end_of_item.'\s*\($\|%\)'    let ind = ind + (2 * &sw)  endif  " }}}  " }}}  " Decrease Indent: {{{1  " if this is :endfor or :enddef statements {{{2  " this is correct because :def cannot be inside :for  if  cs  =~ '\<end\(for\|def\)\=\>'    call MetaSearchNoncomment('\<for\>.\+:\s*\($\|%\)' . '\|' .                            \ '^\s*\(var\)\=def\>',"bW")    if col(".") > 1      let ind = col(".") - 1    else      let ind = indent(".")    endif  " }}}  " if this is :fi, :else, :elseif statements {{{2  elseif cs =~ '\<\(else\(if\)\=\|fi\)\>'    call MetaSearchNoncomment('\<if\>.\+:\s*\($\|%\)',"bW")    let ind = col(".") - 1  " }}}  " if this is :endgroup statement {{{2  elseif cs =~ '^\s*endgroup\>'    let ind = ind - &sw  endif  " }}}  " }}}   return indendfunction" " vim:sw=2:fdm=marker