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Edit File : ft.vim \| Size : 18.51 KB
" Vim functions for file type detection " " Maintainer: Bram Moolenaar <Bram@vim.org> " Last Change: 2017 Dec 05 " These functions are moved here from runtime/filetype.vim to make startup " faster. " Line continuation is used here, remove 'C' from 'cpoptions' let s:cpo_save = &cpo set cpo&vim func dist#ft#Check_inp() if getline(1) =~ '^\' setf abaqus else let n = 1 if line("$") > 500 let nmax = 500 else let nmax = line("$") endif while n <= nmax if getline(n) =~? "^header surface data" setf trasys break endif let n = n + 1 endwhile endif endfunc " This function checks for the kind of assembly that is wanted by the user, or " can be detected from the first five lines of the file. func dist#ft#FTasm() " make sure b:asmsyntax exists if !exists("b:asmsyntax") let b:asmsyntax = "" endif if b:asmsyntax == "" call dist#ft#FTasmsyntax() endif " if b:asmsyntax still isn't set, default to asmsyntax or GNU if b:asmsyntax == "" if exists("g:asmsyntax") let b:asmsyntax = g:asmsyntax else let b:asmsyntax = "asm" endif endif exe "setf " . fnameescape(b:asmsyntax) endfunc func dist#ft#FTasmsyntax() " see if file contains any asmsyntax=foo overrides. If so, change " b:asmsyntax appropriately let head = " ".getline(1)." ".getline(2)." ".getline(3)." ".getline(4). \" ".getline(5)." " let match = matchstr(head, '\sasmsyntax=\zs[a-zA-Z0-9]\+\ze\s') if match != '' let b:asmsyntax = match elseif ((head =~? '\.title') \|\| (head =~? '\.ident') \|\| (head =~? '\.macro') \|\| (head =~? '\.subtitle') \|\| (head =~? '\.library')) let b:asmsyntax = "vmasm" endif endfunc " Check if one of the first five lines contains "VB_Name". In that case it is " probably a Visual Basic file. Otherwise it's assumed to be "alt" filetype. func dist#ft#FTVB(alt) if getline(1).getline(2).getline(3).getline(4).getline(5) =~? 'VB_Name\\|Begin VB\.\(Form\\|MDIForm\\|UserControl\)' setf vb else exe "setf " . a:alt endif endfunc func dist#ft#FTbtm() if exists("g:dosbatch_syntax_for_btm") && g:dosbatch_syntax_for_btm setf dosbatch else setf btm endif endfunc func dist#ft#BindzoneCheck(default) if getline(1).getline(2).getline(3).getline(4) =~ '^; <<>> DiG [0-9.]\+. <<>>\\|$ORIGIN\\|$TTL\\|IN\s\+SOA' setf bindzone elseif a:default != '' exe 'setf ' . a:default endif endfunc func dist#ft#FTlpc() if exists("g:lpc_syntax_for_c") let lnum = 1 while lnum <= 12 if getline(lnum) =~# '^\(//\\|inherit\\|private\\|protected\\|nosave\\|string\\|object\\|mapping\\|mixed\)' setf lpc return endif let lnum = lnum + 1 endwhile endif setf c endfunc func dist#ft#FTheader() if match(getline(1, min([line("$"), 200])), '^@\(interface\\|end\\|class\)') > -1 if exists("g:c_syntax_for_h") setf objc else setf objcpp endif elseif exists("g:c_syntax_for_h") setf c elseif exists("g:ch_syntax_for_h") setf ch else setf cpp endif endfunc " This function checks if one of the first ten lines start with a '@'. In " that case it is probably a change file. " If the first line starts with # or ! it's probably a ch file. " If a line has "main", "include", "//" ir "/" it's probably ch. " Otherwise CHILL is assumed. func dist#ft#FTchange() let lnum = 1 while lnum <= 10 if getline(lnum)[0] == '@' setf change return endif if lnum == 1 && (getline(1)[0] == '#' \|\| getline(1)[0] == '!') setf ch return endif if getline(lnum) =~ "MODULE" setf chill return endif if getline(lnum) =~ 'main\s(\\|#\sinclude\\|//' setf ch return endif let lnum = lnum + 1 endwhile setf chill endfunc func dist#ft#FTent() " This function checks for valid cl syntax in the first five lines. " Look for either an opening comment, '#', or a block start, '{". " If not found, assume SGML. let lnum = 1 while lnum < 6 let line = getline(lnum) if line =~ '^\s[#{]' setf cl return elseif line !~ '^\s$' " Not a blank line, not a comment, and not a block start, " so doesn't look like valid cl code. break endif let lnum = lnum + 1 endw setf dtd endfunc func dist#ft#EuphoriaCheck() if exists('g:filetype_euphoria') exe 'setf ' . g:filetype_euphoria else setf euphoria3 endif endfunc func dist#ft#DtraceCheck() let lines = getline(1, min([line("$"), 100])) if match(lines, '^module\>\\|^import\>') > -1 " D files often start with a module and/or import statement. setf d elseif match(lines, '^#!\S\+dtrace\\|#pragma\s\+D\s\+option\\|:\S\{-}:\S\{-}:') > -1 setf dtrace else setf d endif endfunc func dist#ft#FTe() if exists('g:filetype_euphoria') exe 'setf ' . g:filetype_euphoria else let n = 1 while n < 100 && n < line("$") if getline(n) =~ "^\\s\\(<'\\\|'>\\)\\s$" setf specman return endif let n = n + 1 endwhile setf eiffel endif endfunc " Distinguish between HTML, XHTML and Django func dist#ft#FThtml() let n = 1 while n < 10 && n < line("$") if getline(n) =~ '\<DTD\s\+XHTML\s' setf xhtml return endif if getline(n) =~ '{%\s\(extends\\|block\\|load\)\>\\|{#\s\+' setf htmldjango return endif let n = n + 1 endwhile setf html endfunc " Distinguish between standard IDL and MS-IDL func dist#ft#FTidl() let n = 1 while n < 50 && n < line("$") if getline(n) =~ '^\simport\s\+"\(unknwn\\|objidl\)\.idl"' setf msidl return endif let n = n + 1 endwhile setf idl endfunc " Distinguish between "default" and Cproto prototype file. / func dist#ft#ProtoCheck(default) " Cproto files have a comment in the first line and a function prototype in " the second line, it always ends in ";". Indent files may also have " comments, thus we can't match comments to see the difference. " IDL files can have a single ';' in the second line, require at least one " chacter before the ';'. if getline(2) =~ '.;$' setf cpp else exe 'setf ' . a:default endif endfunc func dist#ft#FTm() let n = 1 let saw_comment = 0 " Whether we've seen a multiline comment leader. while n < 100 let line = getline(n) if line =~ '^\s/\' " /* ... / is a comment in Objective C and Murphi, so we can't conclude " it's either of them yet, but track this as a hint in case we don't see " anything more definitive. let saw_comment = 1 endif if line =~ '^\s\(#\s\(include\\|import\)\>\\|@import\>\\|//\)' setf objc return endif if line =~ '^\s%' setf matlab return endif if line =~ '^\s(\' setf mma return endif if line =~ '^\c\s\(\(type\\|var\)\>\\|--\)' setf murphi return endif let n = n + 1 endwhile if saw_comment " We didn't see anything definitive, but this looks like either Objective C " or Murphi based on the comment leader. Assume the former as it is more " common. setf objc elseif exists("g:filetype_m") " Use user specified default filetype for .m exe "setf " . g:filetype_m else " Default is matlab setf matlab endif endfunc func dist#ft#FTmms() let n = 1 while n < 10 let line = getline(n) if line =~ '^\s\(%\\|//\)' \|\| line =~ '^\' setf mmix return endif if line =~ '^\s#' setf make return endif let n = n + 1 endwhile setf mmix endfunc " This function checks if one of the first five lines start with a dot. In " that case it is probably an nroff file: 'filetype' is set and 1 is returned. func dist#ft#FTnroff() if getline(1)[0] . getline(2)[0] . getline(3)[0] . getline(4)[0] . getline(5)[0] =~ '\.' setf nroff return 1 endif return 0 endfunc func dist#ft#FTmm() let n = 1 while n < 10 let line = getline(n) if line =~ '^\s\(#\s\(include\\|import\)\>\\|@import\>\\|/\\)' setf objcpp return endif let n = n + 1 endwhile setf nroff endfunc func dist#ft#FTpl() if exists("g:filetype_pl") exe "setf " . g:filetype_pl else " recognize Prolog by specific text in the first non-empty line " require a blank after the '%' because Perl uses "%list" and "%translate" let l = getline(nextnonblank(1)) if l =~ '\<prolog\>' \|\| l =~ '^\s\(%\+\(\s\\|$\)\\|/\\)' \|\| l =~ ':-' setf prolog else setf perl endif endif endfunc func dist#ft#FTinc() if exists("g:filetype_inc") exe "setf " . g:filetype_inc else let lines = getline(1).getline(2).getline(3) if lines =~? "perlscript" setf aspperl elseif lines =~ "<%" setf aspvbs elseif lines =~ "<?" setf php else call dist#ft#FTasmsyntax() if exists("b:asmsyntax") exe "setf " . fnameescape(b:asmsyntax) else setf pov endif endif endif endfunc func dist#ft#FTprogress_cweb() if exists("g:filetype_w") exe "setf " . g:filetype_w return endif if getline(1) =~ '&ANALYZE' \|\| getline(3) =~ '&GLOBAL-DEFINE' setf progress else setf cweb endif endfunc func dist#ft#FTprogress_asm() if exists("g:filetype_i") exe "setf " . g:filetype_i return endif " This function checks for an assembly comment the first ten lines. " If not found, assume Progress. let lnum = 1 while lnum <= 10 && lnum < line('$') let line = getline(lnum) if line =~ '^\s;' \|\| line =~ '^\' call dist#ft#FTasm() return elseif line !~ '^\s$' \|\| line =~ '^/\' " Not an empty line: Doesn't look like valid assembly code. " Or it looks like a Progress / comment break endif let lnum = lnum + 1 endw setf progress endfunc func dist#ft#FTprogress_pascal() if exists("g:filetype_p") exe "setf " . g:filetype_p return endif " This function checks for valid Pascal syntax in the first ten lines. " Look for either an opening comment or a program start. " If not found, assume Progress. let lnum = 1 while lnum <= 10 && lnum < line('$') let line = getline(lnum) if line =~ '^\s\(program\\|unit\\|procedure\\|function\\|const\\|type\\|var\)\>' \ \|\| line =~ '^\s{' \|\| line =~ '^\s(\' setf pascal return elseif line !~ '^\s$' \|\| line =~ '^/\' " Not an empty line: Doesn't look like valid Pascal code. " Or it looks like a Progress /* comment break endif let lnum = lnum + 1 endw setf progress endfunc func dist#ft#FTr() let max = line("$") > 50 ? 50 : line("$") for n in range(1, max) " Rebol is easy to recognize, check for that first if getline(n) =~? '\<REBOL\>' setf rebol return endif endfor for n in range(1, max) " R has # comments if getline(n) =~ '^\s#' setf r return endif " Rexx has / comments / if getline(n) =~ '^\s/\' setf rexx return endif endfor " Nothing recognized, use user default or assume Rexx if exists("g:filetype_r") exe "setf " . g:filetype_r else " Rexx used to be the default, but R appears to be much more popular. setf r endif endfunc func dist#ft#McSetf() " Rely on the file to start with a comment. " MS message text files use ';', Sendmail files use '#' or 'dnl' for lnum in range(1, min([line("$"), 20])) let line = getline(lnum) if line =~ '^\s\(#\\|dnl\)' setf m4 " Sendmail .mc file return elseif line =~ '^\s;' setf msmessages " MS Message text file return endif endfor setf m4 " Default: Sendmail .mc file endfunc " Called from filetype.vim and scripts.vim. func dist#ft#SetFileTypeSH(name) if expand("<amatch>") =~ g:ft_ignore_pat return endif if a:name =~ '\<csh\>' " Some .sh scripts contain #!/bin/csh. call dist#ft#SetFileTypeShell("csh") return elseif a:name =~ '\<tcsh\>' " Some .sh scripts contain #!/bin/tcsh. call dist#ft#SetFileTypeShell("tcsh") return elseif a:name =~ '\<zsh\>' " Some .sh scripts contain #!/bin/zsh. call dist#ft#SetFileTypeShell("zsh") return elseif a:name =~ '\<ksh\>' let b:is_kornshell = 1 if exists("b:is_bash") unlet b:is_bash endif if exists("b:is_sh") unlet b:is_sh endif elseif exists("g:bash_is_sh") \|\| a:name =~ '\<bash\>' \|\| a:name =~ '\<bash2\>' let b:is_bash = 1 if exists("b:is_kornshell") unlet b:is_kornshell endif if exists("b:is_sh") unlet b:is_sh endif elseif a:name =~ '\<sh\>' let b:is_sh = 1 if exists("b:is_kornshell") unlet b:is_kornshell endif if exists("b:is_bash") unlet b:is_bash endif endif call dist#ft#SetFileTypeShell("sh") endfunc " For shell-like file types, check for an "exec" command hidden in a comment, " as used for Tcl. " Also called from scripts.vim, thus can't be local to this script. func dist#ft#SetFileTypeShell(name) if expand("<amatch>") =~ g:ft_ignore_pat return endif let l = 2 while l < 20 && l < line("$") && getline(l) =~ '^\s\(#\\|$\)' " Skip empty and comment lines. let l = l + 1 endwhile if l < line("$") && getline(l) =~ '\sexec\s' && getline(l - 1) =~ '^\s#.\\$' " Found an "exec" line after a comment with continuation let n = substitute(getline(l),'\sexec\s\+\([^ ]/\)\=', '', '') if n =~ '\<tclsh\\|\<wish' setf tcl return endif endif exe "setf " . a:name endfunc func dist#ft#CSH() if exists("g:filetype_csh") call dist#ft#SetFileTypeShell(g:filetype_csh) elseif &shell =~ "tcsh" call dist#ft#SetFileTypeShell("tcsh") else call dist#ft#SetFileTypeShell("csh") endif endfunc let s:ft_rules_udev_rules_pattern = '^\s\cudev_rules\s=\s"\([^"]\{-1,}\)/".' func dist#ft#FTRules() let path = expand('<amatch>:p') if path =~ '^/\(etc/udev/\%(rules\.d/\)\=.\.rules\\|lib/udev/\%(rules\.d/\)\=.\.rules\)$' setf udevrules return endif if path =~ '^/etc/ufw/' setf conf " Better than hog return endif if path =~ '^/\(etc\\|usr/share\)/polkit-1/rules\.d' setf javascript return endif try let config_lines = readfile('/etc/udev/udev.conf') catch /^Vim\%((\a\+)\)\=:E484/ setf hog return endtry let dir = expand('<amatch>:p:h') for line in config_lines if line =~ s:ft_rules_udev_rules_pattern let udev_rules = substitute(line, s:ft_rules_udev_rules_pattern, '\1', "") if dir == udev_rules setf udevrules endif break endif endfor setf hog endfunc func dist#ft#SQL() if exists("g:filetype_sql") exe "setf " . g:filetype_sql else setf sql endif endfunc " If the file has an extension of 't' and is in a directory 't' or 'xt' then " it is almost certainly a Perl test file. " If the first line starts with '#' and contains 'perl' it's probably a Perl " file. " (Slow test) If a file contains a 'use' statement then it is almost certainly " a Perl file. func dist#ft#FTperl() let dirname = expand("%:p:h:t") if expand("%:e") == 't' && (dirname == 't' \|\| dirname == 'xt') setf perl return 1 endif if getline(1)[0] == '#' && getline(1) =~ 'perl' setf perl return 1 endif let save_cursor = getpos('.') call cursor(1,1) let has_use = search('^use\s\s\k', 'c', 30) call setpos('.', save_cursor) if has_use setf perl return 1 endif return 0 endfunc " Choose context, plaintex, or tex (LaTeX) based on these rules: " 1. Check the first line of the file for "%&<format>". " 2. Check the first 1000 non-comment lines for LaTeX or ConTeXt keywords. " 3. Default to "latex" or to g:tex_flavor, can be set in user's vimrc. func dist#ft#FTtex() let firstline = getline(1) if firstline =~ '^%&\s\a\+' let format = tolower(matchstr(firstline, '\a\+')) let format = substitute(format, 'pdf', '', '') if format == 'tex' let format = 'latex' elseif format == 'plaintex' let format = 'plain' endif elseif expand('%') =~ 'tex/context/./..tex' let format = 'context' else " Default value, may be changed later: let format = exists("g:tex_flavor") ? g:tex_flavor : 'plain' " Save position, go to the top of the file, find first non-comment line. let save_cursor = getpos('.') call cursor(1,1) let firstNC = search('^\s[^[:space:]%]', 'c', 1000) if firstNC " Check the next thousand lines for a LaTeX or ConTeXt keyword. let lpat = 'documentclass\>\\|usepackage\>\\|begin{\\|newcommand\>\\|renewcommand\>' let cpat = 'start\a\+\\|setup\a\+\\|usemodule\\|enablemode\\|enableregime\\|setvariables\\|useencoding\\|usesymbols\\|stelle\a\+\\|verwende\a\+\\|stel\a\+\\|gebruik\a\+\\|usa\a\+\\|imposta\a\+\\|regle\a\+\\|utilisemodule\>' let kwline = search('^\s\\\%(' . lpat . '\)\\|^\s\\\(' . cpat . '\)', \ 'cnp', firstNC + 1000) if kwline == 1 " lpat matched let format = 'latex' elseif kwline == 2 " cpat matched let format = 'context' endif " If neither matched, keep default set above. " let lline = search('^\s\\\%(' . lpat . '\)', 'cn', firstNC + 1000) " let cline = search('^\s\\\%(' . cpat . '\)', 'cn', firstNC + 1000) " if cline > 0 " let format = 'context' " endif " if lline > 0 && (cline == 0 \|\| cline > lline) " let format = 'tex' " endif endif " firstNC call setpos('.', save_cursor) endif " firstline =~ '^%&\s\a\+' " Translation from formats to file types. TODO: add AMSTeX, RevTex, others? if format == 'plain' setf plaintex elseif format == 'context' setf context else " probably LaTeX setf tex endif return endfunc func dist#ft#FTxml() let n = 1 while n < 100 && n < line("$") let line = getline(n) " DocBook 4 or DocBook 5. let is_docbook4 = line =~ '<!DOCTYPE.DocBook' let is_docbook5 = line =~ ' xmlns="http://docbook.org/ns/docbook"' if is_docbook4 \|\| is_docbook5 let b:docbk_type = "xml" if is_docbook5 let b:docbk_ver = 5 else let b:docbk_ver = 4 endif setf docbk return endif if line =~ 'xmlns:xbl="http://www.mozilla.org/xbl"' setf xbl return endif let n += 1 endwhile setf xml endfunc func dist#ft#FTy() let n = 1 while n < 100 && n < line("$") let line = getline(n) if line =~ '^\s%' setf yacc return endif if getline(n) =~ '^\s\(#\\|class\>\)' && getline(n) !~ '^\s#\s*include' setf racc return endif let n = n + 1 endwhile setf yacc endfunc func dist#ft#Redif() let lnum = 1 while lnum <= 5 && lnum < line('$') if getline(lnum) =~ "^\ctemplate-type:" setf redif return endif let lnum = lnum + 1 endwhile endfunc " Restore 'cpoptions' let &cpo = s:cpo_save unlet s:cpo_save Back

Edit File : ft.vim | Size : 18.51 KB

" Vim functions for file type detection
"
" Maintainer:	Bram Moolenaar <Bram@vim.org>
" Last Change:	2017 Dec 05

" These functions are moved here from runtime/filetype.vim to make startup
" faster.

" Line continuation is used here, remove 'C' from 'cpoptions'
let s:cpo_save = &cpo
set cpo&vim

func dist#ft#Check_inp()
  if getline(1) =~ '^\*'
    setf abaqus
  else
    let n = 1
    if line("$") > 500
      let nmax = 500
    else
      let nmax = line("$")
    endif
    while n <= nmax
      if getline(n) =~? "^header surface data"
	setf trasys
	break
      endif
      let n = n + 1
    endwhile
  endif
endfunc

" This function checks for the kind of assembly that is wanted by the user, or
" can be detected from the first five lines of the file.
func dist#ft#FTasm()
  " make sure b:asmsyntax exists
  if !exists("b:asmsyntax")
    let b:asmsyntax = ""
  endif

if b:asmsyntax == ""
    call dist#ft#FTasmsyntax()
  endif

" if b:asmsyntax still isn't set, default to asmsyntax or GNU
  if b:asmsyntax == ""
    if exists("g:asmsyntax")
      let b:asmsyntax = g:asmsyntax
    else
      let b:asmsyntax = "asm"
    endif
  endif

exe "setf " . fnameescape(b:asmsyntax)
endfunc

func dist#ft#FTasmsyntax()
  " see if file contains any asmsyntax=foo overrides. If so, change
  " b:asmsyntax appropriately
  let head = " ".getline(1)." ".getline(2)." ".getline(3)." ".getline(4).
	\" ".getline(5)." "
  let match = matchstr(head, '\sasmsyntax=\zs[a-zA-Z0-9]\+\ze\s')
  if match != ''
    let b:asmsyntax = match
  elseif ((head =~? '\.title') || (head =~? '\.ident') || (head =~? '\.macro') || (head =~? '\.subtitle') || (head =~? '\.library'))
    let b:asmsyntax = "vmasm"
  endif
endfunc

" Check if one of the first five lines contains "VB_Name".  In that case it is
" probably a Visual Basic file.  Otherwise it's assumed to be "alt" filetype.
func dist#ft#FTVB(alt)
  if getline(1).getline(2).getline(3).getline(4).getline(5) =~? 'VB_Name\|Begin VB\.$Form\|MDIForm\|UserControl$'
    setf vb
  else
    exe "setf " . a:alt
  endif
endfunc

func dist#ft#FTbtm()
  if exists("g:dosbatch_syntax_for_btm") && g:dosbatch_syntax_for_btm
    setf dosbatch
  else
    setf btm
  endif
endfunc

func dist#ft#BindzoneCheck(default)
  if getline(1).getline(2).getline(3).getline(4) =~ '^; <<>> DiG [0-9.]\+.* <<>>\|$ORIGIN\|$TTL\|IN\s\+SOA'
    setf bindzone
  elseif a:default != ''
    exe 'setf ' . a:default
  endif
endfunc

func dist#ft#FTheader()
  if match(getline(1, min([line("$"), 200])), '^@$interface\|end\|class$') > -1
    if exists("g:c_syntax_for_h")
      setf objc
    else
      setf objcpp
    endif
  elseif exists("g:c_syntax_for_h")
    setf c
  elseif exists("g:ch_syntax_for_h")
    setf ch
  else
    setf cpp
  endif
endfunc

" This function checks if one of the first ten lines start with a '@'.  In
" that case it is probably a change file.
" If the first line starts with # or ! it's probably a ch file.
" If a line has "main", "include", "//" ir "/*" it's probably ch.
" Otherwise CHILL is assumed.
func dist#ft#FTchange()
  let lnum = 1
  while lnum <= 10
    if getline(lnum)[0] == '@'
      setf change
      return
    endif
    if lnum == 1 && (getline(1)[0] == '#' || getline(1)[0] == '!')
      setf ch
      return
    endif
    if getline(lnum) =~ "MODULE"
      setf chill
      return
    endif
    if getline(lnum) =~ 'main\s*(\|#\s*include\|//'
      setf ch
      return
    endif
    let lnum = lnum + 1
  endwhile
  setf chill
endfunc

func dist#ft#FTent()
  " This function checks for valid cl syntax in the first five lines.
  " Look for either an opening comment, '#', or a block start, '{".
  " If not found, assume SGML.
  let lnum = 1
  while lnum < 6
    let line = getline(lnum)
    if line =~ '^\s*[#{]'
      setf cl
      return
    elseif line !~ '^\s*$'
      " Not a blank line, not a comment, and not a block start,
      " so doesn't look like valid cl code.
      break
    endif
    let lnum = lnum + 1
  endw
  setf dtd
endfunc

func dist#ft#EuphoriaCheck()
  if exists('g:filetype_euphoria')
    exe 'setf ' . g:filetype_euphoria
  else
    setf euphoria3
  endif
endfunc

func dist#ft#DtraceCheck()
  let lines = getline(1, min([line("$"), 100]))
  if match(lines, '^module\>\|^import\>') > -1
    " D files often start with a module and/or import statement.
    setf d
  elseif match(lines, '^#!\S\+dtrace\|#pragma\s\+D\s\+option\|:\S\{-}:\S\{-}:') > -1
    setf dtrace
  else
    setf d
  endif
endfunc

func dist#ft#FTe()
  if exists('g:filetype_euphoria')
    exe 'setf ' . g:filetype_euphoria
  else
    let n = 1
    while n < 100 && n < line("$")
      if getline(n) =~ "^\\s*\$<'\\|'>\$\\s*$"
	setf specman
	return
      endif
      let n = n + 1
    endwhile
    setf eiffel
  endif
endfunc

" Distinguish between HTML, XHTML and Django
func dist#ft#FThtml()
  let n = 1
  while n < 10 && n < line("$")
    if getline(n) =~ '\<DTD\s\+XHTML\s'
      setf xhtml
      return
    endif
    if getline(n) =~ '{%\s*$extends\|block\|load$\>\|{#\s\+'
      setf htmldjango
      return
    endif
    let n = n + 1
  endwhile
  setf html
endfunc

" Distinguish between standard IDL and MS-IDL
func dist#ft#FTidl()
  let n = 1
  while n < 50 && n < line("$")
    if getline(n) =~ '^\s*import\s\+"$unknwn\|objidl$\.idl"'
      setf msidl
      return
    endif
    let n = n + 1
  endwhile
  setf idl
endfunc

" Distinguish between "default" and Cproto prototype file. */
func dist#ft#ProtoCheck(default)
  " Cproto files have a comment in the first line and a function prototype in
  " the second line, it always ends in ";".  Indent files may also have
  " comments, thus we can't match comments to see the difference.
  " IDL files can have a single ';' in the second line, require at least one
  " chacter before the ';'.
  if getline(2) =~ '.;$'
    setf cpp
  else
    exe 'setf ' . a:default
  endif
endfunc

func dist#ft#FTm()
  let n = 1
  let saw_comment = 0 " Whether we've seen a multiline comment leader.
  while n < 100
    let line = getline(n)
    if line =~ '^\s*/\*'
      " /* ... */ is a comment in Objective C and Murphi, so we can't conclude
      " it's either of them yet, but track this as a hint in case we don't see
      " anything more definitive.
      let saw_comment = 1
    endif
    if line =~ '^\s*$#\s*\(include\|import$\>\|@import\>\|//\)'
      setf objc
      return
    endif
    if line =~ '^\s*%'
      setf matlab
      return
    endif
    if line =~ '^\s*(\*'
      setf mma
      return
    endif
    if line =~ '^\c\s*$\(type\|var$\>\|--\)'
      setf murphi
      return
    endif
    let n = n + 1
  endwhile

if saw_comment
    " We didn't see anything definitive, but this looks like either Objective C
    " or Murphi based on the comment leader. Assume the former as it is more
    " common.
    setf objc
  elseif exists("g:filetype_m")
    " Use user specified default filetype for .m
    exe "setf " . g:filetype_m
  else
    " Default is matlab
    setf matlab
  endif
endfunc

func dist#ft#FTmms()
  let n = 1
  while n < 10
    let line = getline(n)
    if line =~ '^\s*$%\|//$' || line =~ '^\*'
      setf mmix
      return
    endif
    if line =~ '^\s*#'
      setf make
      return
    endif
    let n = n + 1
  endwhile
  setf mmix
endfunc

" This function checks if one of the first five lines start with a dot.  In
" that case it is probably an nroff file: 'filetype' is set and 1 is returned.
func dist#ft#FTnroff()
  if getline(1)[0] . getline(2)[0] . getline(3)[0] . getline(4)[0] . getline(5)[0] =~ '\.'
    setf nroff
    return 1
  endif
  return 0
endfunc

func dist#ft#FTmm()
  let n = 1
  while n < 10
    let line = getline(n)
    if line =~ '^\s*$#\s*\(include\|import$\>\|@import\>\|/\*\)'
      setf objcpp
      return
    endif
    let n = n + 1
  endwhile
  setf nroff
endfunc

func dist#ft#FTpl()
  if exists("g:filetype_pl")
    exe "setf " . g:filetype_pl
  else
    " recognize Prolog by specific text in the first non-empty line
    " require a blank after the '%' because Perl uses "%list" and "%translate"
    let l = getline(nextnonblank(1))
    if l =~ '\<prolog\>' || l =~ '^\s*$%\+\(\s\|$$\|/\*\)' || l =~ ':-'
      setf prolog
    else
      setf perl
    endif
  endif
endfunc

func dist#ft#FTinc()
  if exists("g:filetype_inc")
    exe "setf " . g:filetype_inc
  else
    let lines = getline(1).getline(2).getline(3)
    if lines =~? "perlscript"
      setf aspperl
    elseif lines =~ "<%"
      setf aspvbs
    elseif lines =~ "<?"
      setf php
    else
      call dist#ft#FTasmsyntax()
      if exists("b:asmsyntax")
	exe "setf " . fnameescape(b:asmsyntax)
      else
	setf pov
      endif
    endif
  endif
endfunc

func dist#ft#FTprogress_cweb()
  if exists("g:filetype_w")
    exe "setf " . g:filetype_w
    return
  endif
  if getline(1) =~ '&ANALYZE' || getline(3) =~ '&GLOBAL-DEFINE'
    setf progress
  else
    setf cweb
  endif
endfunc

func dist#ft#FTprogress_asm()
  if exists("g:filetype_i")
    exe "setf " . g:filetype_i
    return
  endif
  " This function checks for an assembly comment the first ten lines.
  " If not found, assume Progress.
  let lnum = 1
  while lnum <= 10 && lnum < line('$')
    let line = getline(lnum)
    if line =~ '^\s*;' || line =~ '^\*'
      call dist#ft#FTasm()
      return
    elseif line !~ '^\s*$' || line =~ '^/\*'
      " Not an empty line: Doesn't look like valid assembly code.
      " Or it looks like a Progress /* comment
      break
    endif
    let lnum = lnum + 1
  endw
  setf progress
endfunc

func dist#ft#FTprogress_pascal()
  if exists("g:filetype_p")
    exe "setf " . g:filetype_p
    return
  endif
  " This function checks for valid Pascal syntax in the first ten lines.
  " Look for either an opening comment or a program start.
  " If not found, assume Progress.
  let lnum = 1
  while lnum <= 10 && lnum < line('$')
    let line = getline(lnum)
    if line =~ '^\s*$program\|unit\|procedure\|function\|const\|type\|var$\>'
	\ || line =~ '^\s*{' || line =~ '^\s*(\*'
      setf pascal
      return
    elseif line !~ '^\s*$' || line =~ '^/\*'
      " Not an empty line: Doesn't look like valid Pascal code.
      " Or it looks like a Progress /* comment
      break
    endif
    let lnum = lnum + 1
  endw
  setf progress
endfunc

func dist#ft#FTr()
  let max = line("$") > 50 ? 50 : line("$")

for n in range(1, max)
    " Rebol is easy to recognize, check for that first
    if getline(n) =~? '\<REBOL\>'
      setf rebol
      return
    endif
  endfor

for n in range(1, max)
    " R has # comments
    if getline(n) =~ '^\s*#'
      setf r
      return
    endif
    " Rexx has /* comments */
    if getline(n) =~ '^\s*/\*'
      setf rexx
      return
    endif
  endfor

" Nothing recognized, use user default or assume Rexx
  if exists("g:filetype_r")
    exe "setf " . g:filetype_r
  else
    " Rexx used to be the default, but R appears to be much more popular.
    setf r
  endif
endfunc

func dist#ft#McSetf()
  " Rely on the file to start with a comment.
  " MS message text files use ';', Sendmail files use '#' or 'dnl'
  for lnum in range(1, min([line("$"), 20]))
    let line = getline(lnum)
    if line =~ '^\s*$#\|dnl$'
      setf m4  " Sendmail .mc file
      return
    elseif line =~ '^\s*;'
      setf msmessages  " MS Message text file
      return
    endif
  endfor
  setf m4  " Default: Sendmail .mc file
endfunc

" Called from filetype.vim and scripts.vim.
func dist#ft#SetFileTypeSH(name)
  if expand("<amatch>") =~ g:ft_ignore_pat
    return
  endif
  if a:name =~ '\<csh\>'
    " Some .sh scripts contain #!/bin/csh.
    call dist#ft#SetFileTypeShell("csh")
    return
  elseif a:name =~ '\<tcsh\>'
    " Some .sh scripts contain #!/bin/tcsh.
    call dist#ft#SetFileTypeShell("tcsh")
    return
  elseif a:name =~ '\<zsh\>'
    " Some .sh scripts contain #!/bin/zsh.
    call dist#ft#SetFileTypeShell("zsh")
    return
  elseif a:name =~ '\<ksh\>'
    let b:is_kornshell = 1
    if exists("b:is_bash")
      unlet b:is_bash
    endif
    if exists("b:is_sh")
      unlet b:is_sh
    endif
  elseif exists("g:bash_is_sh") || a:name =~ '\<bash\>' || a:name =~ '\<bash2\>'
    let b:is_bash = 1
    if exists("b:is_kornshell")
      unlet b:is_kornshell
    endif
    if exists("b:is_sh")
      unlet b:is_sh
    endif
  elseif a:name =~ '\<sh\>'
    let b:is_sh = 1
    if exists("b:is_kornshell")
      unlet b:is_kornshell
    endif
    if exists("b:is_bash")
      unlet b:is_bash
    endif
  endif
  call dist#ft#SetFileTypeShell("sh")
endfunc

" For shell-like file types, check for an "exec" command hidden in a comment,
" as used for Tcl.
" Also called from scripts.vim, thus can't be local to this script.
func dist#ft#SetFileTypeShell(name)
  if expand("<amatch>") =~ g:ft_ignore_pat
    return
  endif
  let l = 2
  while l < 20 && l < line("$") && getline(l) =~ '^\s*$#\|$$'
    " Skip empty and comment lines.
    let l = l + 1
  endwhile
  if l < line("$") && getline(l) =~ '\s*exec\s' && getline(l - 1) =~ '^\s*#.*\\$'
    " Found an "exec" line after a comment with continuation
    let n = substitute(getline(l),'\s*exec\s\+$[^ ]*/$\=', '', '')
    if n =~ '\<tclsh\|\<wish'
      setf tcl
      return
    endif
  endif
  exe "setf " . a:name
endfunc

func dist#ft#CSH()
  if exists("g:filetype_csh")
    call dist#ft#SetFileTypeShell(g:filetype_csh)
  elseif &shell =~ "tcsh"
    call dist#ft#SetFileTypeShell("tcsh")
  else
    call dist#ft#SetFileTypeShell("csh")
  endif
endfunc

let s:ft_rules_udev_rules_pattern = '^\s*\cudev_rules\s*=\s*"$[^"]\{-1,}$/*".*'
func dist#ft#FTRules()
  let path = expand('<amatch>:p')
  if path =~ '^/$etc/udev/\%(rules\.d/$\=.*\.rules\|lib/udev/\%(rules\.d/\)\=.*\.rules\)$'
    setf udevrules
    return
  endif
  if path =~ '^/etc/ufw/'
    setf conf  " Better than hog
    return
  endif
  if path =~ '^/$etc\|usr/share$/polkit-1/rules\.d'
    setf javascript
    return
  endif
  try
    let config_lines = readfile('/etc/udev/udev.conf')
  catch /^Vim\%((\a\+)\)\=:E484/
    setf hog
    return
  endtry
  let dir = expand('<amatch>:p:h')
  for line in config_lines
    if line =~ s:ft_rules_udev_rules_pattern
      let udev_rules = substitute(line, s:ft_rules_udev_rules_pattern, '\1', "")
      if dir == udev_rules
	setf udevrules
      endif
      break
    endif
  endfor
  setf hog
endfunc

func dist#ft#SQL()
  if exists("g:filetype_sql")
    exe "setf " . g:filetype_sql
  else
    setf sql
  endif
endfunc

" If the file has an extension of 't' and is in a directory 't' or 'xt' then
" it is almost certainly a Perl test file.
" If the first line starts with '#' and contains 'perl' it's probably a Perl
" file.
" (Slow test) If a file contains a 'use' statement then it is almost certainly
" a Perl file.
func dist#ft#FTperl()
  let dirname = expand("%:p:h:t")
  if expand("%:e") == 't' && (dirname == 't' || dirname == 'xt')
    setf perl
    return 1
  endif
  if getline(1)[0] == '#' && getline(1) =~ 'perl'
    setf perl
    return 1
  endif
  let save_cursor = getpos('.')
  call cursor(1,1)
  let has_use = search('^use\s\s*\k', 'c', 30)
  call setpos('.', save_cursor)
  if has_use
    setf perl
    return 1
  endif
  return 0
endfunc

" Choose context, plaintex, or tex (LaTeX) based on these rules:
" 1. Check the first line of the file for "%&<format>".
" 2. Check the first 1000 non-comment lines for LaTeX or ConTeXt keywords.
" 3. Default to "latex" or to g:tex_flavor, can be set in user's vimrc.
func dist#ft#FTtex()
  let firstline = getline(1)
  if firstline =~ '^%&\s*\a\+'
    let format = tolower(matchstr(firstline, '\a\+'))
    let format = substitute(format, 'pdf', '', '')
    if format == 'tex'
      let format = 'latex'
    elseif format == 'plaintex'
      let format = 'plain'
    endif
  elseif expand('%') =~ 'tex/context/.*/.*.tex'
    let format = 'context'
  else
    " Default value, may be changed later:
    let format = exists("g:tex_flavor") ? g:tex_flavor : 'plain'
    " Save position, go to the top of the file, find first non-comment line.
    let save_cursor = getpos('.')
    call cursor(1,1)
    let firstNC = search('^\s*[^[:space:]%]', 'c', 1000)
    if firstNC " Check the next thousand lines for a LaTeX or ConTeXt keyword.
      let lpat = 'documentclass\>\|usepackage\>\|begin{\|newcommand\>\|renewcommand\>'
      let cpat = 'start\a\+\|setup\a\+\|usemodule\|enablemode\|enableregime\|setvariables\|useencoding\|usesymbols\|stelle\a\+\|verwende\a\+\|stel\a\+\|gebruik\a\+\|usa\a\+\|imposta\a\+\|regle\a\+\|utilisemodule\>'
      let kwline = search('^\s*\\\%(' . lpat . '\)\|^\s*\\$' . cpat . '$',
			      \ 'cnp', firstNC + 1000)
      if kwline == 1	" lpat matched
	let format = 'latex'
      elseif kwline == 2	" cpat matched
	let format = 'context'
      endif		" If neither matched, keep default set above.
      " let lline = search('^\s*\\\%(' . lpat . '\)', 'cn', firstNC + 1000)
      " let cline = search('^\s*\\\%(' . cpat . '\)', 'cn', firstNC + 1000)
      " if cline > 0
      "   let format = 'context'
      " endif
      " if lline > 0 && (cline == 0 || cline > lline)
      "   let format = 'tex'
      " endif
    endif " firstNC
    call setpos('.', save_cursor)
  endif " firstline =~ '^%&\s*\a\+'

" Translation from formats to file types.  TODO:  add AMSTeX, RevTex, others?
  if format == 'plain'
    setf plaintex
  elseif format == 'context'
    setf context
  else " probably LaTeX
    setf tex
  endif
  return
endfunc

func dist#ft#FTxml()
  let n = 1
  while n < 100 && n < line("$")
    let line = getline(n)
    " DocBook 4 or DocBook 5.
    let is_docbook4 = line =~ '<!DOCTYPE.*DocBook'
    let is_docbook5 = line =~ ' xmlns="http://docbook.org/ns/docbook"'
    if is_docbook4 || is_docbook5
      let b:docbk_type = "xml"
      if is_docbook5
	let b:docbk_ver = 5
      else
	let b:docbk_ver = 4
      endif
      setf docbk
      return
    endif
    if line =~ 'xmlns:xbl="http://www.mozilla.org/xbl"'
      setf xbl
      return
    endif
    let n += 1
  endwhile
  setf xml
endfunc

func dist#ft#FTy()
  let n = 1
  while n < 100 && n < line("$")
    let line = getline(n)
    if line =~ '^\s*%'
      setf yacc
      return
    endif
    if getline(n) =~ '^\s*$#\|class\>$' && getline(n) !~ '^\s*#\s*include'
      setf racc
      return
    endif
    let n = n + 1
  endwhile
  setf yacc
endfunc

func dist#ft#Redif()
  let lnum = 1
  while lnum <= 5 && lnum < line('$')
    if getline(lnum) =~ "^\ctemplate-type:"
      setf redif
      return
    endif
    let lnum = lnum + 1
  endwhile
endfunc

" Restore 'cpoptions'
let &cpo = s:cpo_save
unlet s:cpo_save

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