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Editing: lhaskell.vim
" Vim syntax file " Language: Haskell with literate comments, Bird style, " TeX style and plain text surrounding " \begin{code} \end{code} blocks " Maintainer: Haskell Cafe mailinglist <haskell-cafe@haskell.org> " Original Author: Arthur van Leeuwen <arthurvl@cs.uu.nl> " Last Change: 2010 Apr 11 " Version: 1.04 " " Thanks to Ian Lynagh for thoughtful comments on initial versions and " for the inspiration for writing this in the first place. " " This style guesses as to the type of markup used in a literate haskell " file and will highlight (La)TeX markup if it finds any " This behaviour can be overridden, both glabally and locally using " the lhs_markup variable or b:lhs_markup variable respectively. " " lhs_markup must be set to either tex or none to indicate that " you always want (La)TeX highlighting or no highlighting " must not be set to let the highlighting be guessed " b:lhs_markup must be set to eiterh tex or none to indicate that " you want (La)TeX highlighting or no highlighting for " this particular buffer " must not be set to let the highlighting be guessed " " " 2004 February 18: New version, based on Ian Lynagh's TeX guessing " lhaskell.vim, cweb.vim, tex.vim, sh.vim and fortran.vim " 2004 February 20: Cleaned up the guessing and overriding a bit " 2004 February 23: Cleaned up syntax highlighting for \begin{code} and " \end{code}, added some clarification to the attributions " 2008 July 1: Removed % from guess list, as it totally breaks plain " text markup guessing " 2009 April 29: Fixed highlighting breakage in TeX mode, " thanks to Kalman Noel " " quit when a syntax file was already loaded if exists("b:current_syntax") finish endif " First off, see if we can inherit a user preference for lhs_markup if !exists("b:lhs_markup") if exists("lhs_markup") if lhs_markup =~ '\<\%(tex\|none\)\>' let b:lhs_markup = matchstr(lhs_markup,'\<\%(tex\|none\)\>') else echohl WarningMsg | echo "Unknown value of lhs_markup" | echohl None let b:lhs_markup = "unknown" endif else let b:lhs_markup = "unknown" endif else if b:lhs_markup !~ '\<\%(tex\|none\)\>' let b:lhs_markup = "unknown" endif endif " Remember where the cursor is, and go to upperleft let s:oldline=line(".") let s:oldcolumn=col(".") call cursor(1,1) " If no user preference, scan buffer for our guess of the markup to " highlight. We only differentiate between TeX and plain markup, where " plain is not highlighted. The heuristic for finding TeX markup is if " one of the following occurs anywhere in the file: " - \documentclass " - \begin{env} (for env != code) " - \part, \chapter, \section, \subsection, \subsubsection, etc if b:lhs_markup == "unknown" if search('\\documentclass\|\\begin{\(code}\)\@!\|\\\(sub\)*section\|\\chapter|\\part','W') != 0 let b:lhs_markup = "tex" else let b:lhs_markup = "plain" endif endif " If user wants us to highlight TeX syntax or guess thinks it's TeX, read it. if b:lhs_markup == "tex" runtime! syntax/tex.vim unlet b:current_syntax " Tex.vim removes "_" from 'iskeyword', but we need it for Haskell. setlocal isk+=_ syntax cluster lhsTeXContainer contains=tex.*Zone,texAbstract else syntax cluster lhsTeXContainer contains=.* endif " Literate Haskell is Haskell in between text, so at least read Haskell " highlighting syntax include @haskellTop syntax/haskell.vim syntax region lhsHaskellBirdTrack start="^>" end="\%(^[^>]\)\@=" contains=@haskellTop,lhsBirdTrack containedin=@lhsTeXContainer syntax region lhsHaskellBeginEndBlock start="^\\begin{code}\s*$" matchgroup=NONE end="\%(^\\end{code}.*$\)\@=" contains=@haskellTop,beginCodeBegin containedin=@lhsTeXContainer syntax match lhsBirdTrack "^>" contained syntax match beginCodeBegin "^\\begin" nextgroup=beginCodeCode contained syntax region beginCodeCode matchgroup=texDelimiter start="{" end="}" " Define the default highlighting. " Only when an item doesn't have highlighting yet hi def link lhsBirdTrack Comment hi def link beginCodeBegin texCmdName hi def link beginCodeCode texSection " Restore cursor to original position, as it may have been disturbed " by the searches in our guessing code call cursor (s:oldline, s:oldcolumn) unlet s:oldline unlet s:oldcolumn let b:current_syntax = "lhaskell" " vim: ts=8
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