replace the syntax file with something more minimalistic and opinionated

Author: fmoralesc

autoload/pandoc/syntax/color.vim

@@ -100,7 +100,7 @@ function! pandoc#syntax#color#Instrospect(group)
     let hi_output = split(hi_output, '\n')[0]
     let parts = split(hi_output, '\s\+')[2:]
     if parts[0] == 'links'
-        let info = Hi_Info(parts[2])
+        let info = pandoc#syntax#color#Instrospect(parts[2])
         let info['linked_to'] = parts[2]
     else
         let info = {}

syntax/pandoc.vim

@@ -1,23 +1,71 @@
 " Vim syntax file
 " Filetype: pandoc
-" Language: CommonMark
-" Maintainer: Caleb Maclennan <[email protected]>
+" Language: pandoc markdown, simplified
 " Maintainer: Felipe Morales <[email protected]>
 
 scriptencoding utf-8
 
-if exists('b:current_syntax')
-  finish
-endif
+syntax clear
 
-if !exists('b:is_legacy')
-  let b:is_legacy = exists('g:pandoc_legacy')
-endif
+syn spell toplevel
 
-if b:is_legacy
-	syntax clear
-else
-	source pandoc_legacy.vim
-endif
+" A pandoc markdown document is based on blocks.
 
-let b:current_syntax = b:is_legacy ? 'pandoc' : 'pandoc_legacy'
+syn region pdcPar start=/^\s*[[:print:]]/ end=/[[:print:]]\(\n\s*\n\)\@=/ keepend contains=@Spell
+
+" YAML headers
+unlet! b:current_syntax
+syn include @YAML syntax/yaml.vim
+syn region pdcYAML matchgroup=Delimiter start=/^\s*---\(\n\s*[[:print:]]\)\@=/ end=/---\n\s*\n/ keepend contains=@YAML
+
+" LaTeX environments
+unlet! b:current_syntax
+syn include @LATEX syntax/tex.vim
+syn region pdcLaTeXEnv start=/\\begin{\z(.\{-}\)}/ end=/\\end{\z1}/ keepend contains=@LATEX
+syn region pdcLaTeXDisplayMath start=/\z(\\\@<!\$\{1,2}\)/ end=/\z1/ keepend contains=@LATEX containedin=pdcPar,pdcBlockQuote,pdcOList,pdcUList,pdcFootnote,pdcFootnotePar
+"syn match pdcLaTeXCmd /\\\S\{1,}/ contains=@LATEX keepend containedin=pdcPar
+syn match pdcLaTeXCmd /\\[[:alpha:]]\+\(\({.\{-}}\)\=\(\[.\{-}\]\)\=\)*/ contains=@LATEX keepend containedin=pdcPar,pdcBlockQuote,pdcOList,pdcUList,pdcFootnote,pdcFootnotePar
+
+" Code Blocks
+syn region pdcCodeblock start=/^\(\s\{4,}\|\t\{1,}\)/ end=/[[:print:]]\zs\n\ze\s*\n/
+syn region pdcDelimitedCodeBlock start=/^\z([`~]\{3}\)/ end=/\z1\n\s*\n/
+syn region pdcLaTeXCodeBlock matchgroup=Delimiter start=/^```{=latex}/ end=/```\n\s*\n/ keepend contains=@LATEX
+
+" Blockquotes
+syn region pdcBlockQuote start=/^\s\{,3}>\s\?/ end=/[[:print:]]\(\n\s*\n\)\@=/ keepend
+
+" Lists
+syn region pdcUList start=/^>\=\s*[*=-]\ze\s*[[:print:]]$/ end=/[[:print:]]\(\n\s*\n\)\@=/ keepend
+syn region pdcOList start=/^(\?\(\d\+\|\l\|\#\|@.\{-}\|x\=l\=\(i\{,3}[vx]\=\)\{,3}c\{,3}\)[.)]/ end=/[[:print:]]\(\n\s*\n\)\@=/ keepend
+
+" Fenced DIVS
+syn region pdcFencedDiv matchgroup=Delimiter start=/^:::.*$/ end=/:::\n\s*\n/ keepend contains=@LATEX,pdcPar contains=@Spell
+
+" Atx headers
+syn match pdcAtxHeader /\(\%^\|<.\+>.*\n\|^\s*\n\)\@<=#\{1,6}.*\n/ keepend contained containedin=pdcPar contains=@Spell
+
+" Footnotes
+syn region pdcFootnote start=/^\[\^/ end=/[[:print:]]\zs\n\ze\s*\n/ keepend contains=@Spell
+syn region pdcInlineFootnote matchgroup=Delimiter start=/\^\[/ skip=/\[[[:print:]]*\]/ end=/\]/ keepend contained containedin=pdcPar,pdcUList,pdcOList
+syn region pdcFootnoteRef matchgroup=Delimiter start=/\[\^/ end=/\]/ contained containedin=pdcPar,pdcBlockQuote,pdcUList,pdcOList,pdcFootnote nextgroup=pdcFootnotePar
+syn region pdcFootnotePar start=/^\t[[:print:]]/ end=/[[:print:]]\(\n\s*\n\)\@=/ keepend contains=@Spell nextgroup=pdcFootnotePar
+
+" References.
+syn match pdcBibRef /@[[:alnum:]:_-]\{1,}\(\[[[:print:]]\{-}\]\)\?/ containedin=pdcPar,pdcUList,pdcOList,pdcBlockQuote
+syn match pdcBibRefIF /@[[:alnum:]:_-]\{1,}\(\[[[:print:]]\{-}\]\)\?/ containedin=pdcInlineFootnote,pdcFootnote,pdcFootnotePar
+
+let b:current_syntax = 'pandoc'
+
+hi def link pdcCodeblock Special
+hi def link pdcDelimitedCodeBlock pdcCodeblock
+hi def link pdcAtxHeader Directory
+hi def link pdcFootnote Comment
+hi def link pdcInlineFootnote pdcFootnote
+hi def link pdcFootnotePar pdcFootnote
+hi def link pdcFootnoteBlockQuote pdcFootnote
+hi def pdcBodyLink ctermfg=fg guifg=fg guisp=SteelBlue4 gui=underline cterm=underline
+let fn_fg = pandoc#syntax#color#Instrospect('pdcInlineFootnote').guifg
+exe 'hi def pdcFootLink guifg='.fn_fg.' guisp=SteelBlue4 gui=underline cterm=underline'
+hi def link pdcBibRef pdcBodyLink
+hi def link pdcFootnoteRef pdcFootLink
+hi def link pdcBibRefIF pdcFootLink