" Vim syntax file
" Language:    Lout
" Maintainer:  Christian V. J. Brüssow <cvjb@cvjb.de>
" Last Change: So 12 Feb 2012 15:15:03 CET
" Filenames:   *.lout,*.lt
" URL:         http://www.cvjb.de/comp/vim/lout.vim

" $Id: lout.vim,v 1.4 2012/02/12 15:16:17 bruessow Exp $
"
" Lout: Basser Lout document formatting system.

" Many Thanks to...
" 
" 2012-02-12:
" Thilo Six <T.Six at gmx dot de> send a patch for cpoptions.
" See the discussion at http://thread.gmane.org/gmane.editors.vim.devel/32151


" For version 5.x: Clear all syntax items
" For version 6.x: Quit when a syntax file was already loaded
if version < 600
	syntax clear
elseif exists("b:current_syntax")
	finish
endif

let s:cpo_save=&cpo
set cpo&vim

" Lout is case sensitive
syn case match

" Synchronization, I know it is a huge number, but normal texts can be
" _very_ long ;-)
syn sync lines=1000

" Characters allowed in keywords
" I don't know if 128-255 are allowed in ANS-FORHT
if version >= 600
	setlocal iskeyword=@,48-57,.,@-@,_,192-255
else
	set iskeyword=@,48-57,.,@-@,_,192-255
endif

" Some special keywords
syn keyword loutTodo contained TODO lout Lout LOUT
syn keyword loutDefine def macro

" Some big structures
syn keyword loutKeyword @Begin @End @Figure @Tab
syn keyword loutKeyword @Book @Doc @Document @Report
syn keyword loutKeyword @Introduction @Abstract @Appendix
syn keyword loutKeyword @Chapter @Section @BeginSections @EndSections

" All kind of Lout keywords
syn match loutFunction '\<@[^ \t{}]\+\>'

" Braces -- Don`t edit these lines!
syn match loutMBraces '[{}]'
syn match loutIBraces '[{}]'
syn match loutBBrace '[{}]'
syn match loutBIBraces '[{}]'
syn match loutHeads '[{}]'

" Unmatched braces.
syn match loutBraceError '}'

" End of multi-line definitions, like @Document, @Report and @Book.
syn match loutEOmlDef '^//$'

" Grouping of parameters and objects.
syn region loutObject transparent matchgroup=Delimiter start='{' matchgroup=Delimiter end='}' contains=ALLBUT,loutBraceError

" The NULL object has a special meaning
syn keyword loutNULL {}

" Comments
syn region loutComment start='\#' end='$' contains=loutTodo

" Double quotes
syn region loutSpecial start=+"+ skip=+\\\\\|\\"+ end=+"+

" ISO-LATIN-1 characters created with @Char, or Adobe symbols
" created with @Sym
syn match loutSymbols '@\(\(Char\)\|\(Sym\)\)\s\+[A-Za-z]\+'

" Include files
syn match loutInclude '@IncludeGraphic\s\+\k\+'
syn region loutInclude start='@\(\(SysInclude\)\|\(IncludeGraphic\)\|\(Include\)\)\s*{' end='}'

" Tags
syn match loutTag '@\(\(Tag\)\|\(PageMark\)\|\(PageOf\)\|\(NumberOf\)\)\s\+\k\+'
syn region loutTag start='@Tag\s*{' end='}'

" Equations
syn match loutMath '@Eq\s\+\k\+'
syn region loutMath matchgroup=loutMBraces start='@Eq\s*{' matchgroup=loutMBraces end='}' contains=ALLBUT,loutBraceError
"
" Fonts
syn match loutItalic '@I\s\+\k\+'
syn region loutItalic matchgroup=loutIBraces start='@I\s*{' matchgroup=loutIBraces end='}' contains=ALLBUT,loutBraceError
syn match loutBold '@B\s\+\k\+'
syn region loutBold matchgroup=loutBBraces start='@B\s*{' matchgroup=loutBBraces end='}' contains=ALLBUT,loutBraceError
syn match loutBoldItalic '@BI\s\+\k\+'
syn region loutBoldItalic matchgroup=loutBIBraces start='@BI\s*{' matchgroup=loutBIBraces end='}' contains=ALLBUT,loutBraceError
syn region loutHeadings matchgroup=loutHeads start='@\(\(Title\)\|\(Caption\)\)\s*{' matchgroup=loutHeads end='}' contains=ALLBUT,loutBraceError

" Define the default highlighting.
" For version 5.7 and earlier: only when not done already
" For version 5.8 and later: only when an item doesn't have highlighting yet
if version >= 508 || !exists("did_lout_syn_inits")
	if version < 508
		let did_lout_syn_inits = 1
		command -nargs=+ HiLink hi link <args>
	else
		command -nargs=+ HiLink hi def link <args>
	endif

	" The default methods for highlighting. Can be overrriden later.
	HiLink loutTodo Todo
	HiLink loutDefine Define
	HiLink loutEOmlDef Define
	HiLink loutFunction Function
	HiLink loutBraceError Error
	HiLink loutNULL Special
	HiLink loutComment Comment
	HiLink loutSpecial Special
	HiLink loutSymbols Character
	HiLink loutInclude Include
	HiLink loutKeyword Keyword
	HiLink loutTag Tag
	HiLink loutMath Number

	" HiLink Not really needed here, but I think it is more consistent.
	HiLink loutMBraces loutMath
	hi loutItalic term=italic cterm=italic gui=italic
	HiLink loutIBraces loutItalic
	hi loutBold term=bold cterm=bold gui=bold
	HiLink loutBBraces loutBold
	hi loutBoldItalic term=bold,italic cterm=bold,italic gui=bold,italic
	HiLink loutBIBraces loutBoldItalic
	hi loutHeadings term=bold cterm=bold guifg=indianred
	HiLink loutHeads loutHeadings

	delcommand HiLink
endif

let b:current_syntax = "lout"

let &cpo=s:cpo_save
unlet s:cpo_save

" vim:ts=8:sw=4:nocindent:smartindent: