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" markdown Text with R statements
" Language: markdown with R code chunks
" Homepage: https://github.com/jalvesaq/R-Vim-runtime
" Last Change: Sat Jan 28, 2017 10:06PM
"
" CONFIGURATION:
" To highlight chunk headers as R code, put in your vimrc (e.g. .config/nvim/init.vim):
" let rmd_syn_hl_chunk = 1
"
" For highlighting pandoc extensions to markdown like citations and TeX and
" many other advanced features like folding of markdown sections, it is
" recommended to install the vim-pandoc filetype plugin as well as the
" vim-pandoc-syntax filetype plugin from https://github.com/vim-pandoc.
"
" TODO:
" - Provide highlighting for rmarkdown parameters in yaml header
if exists("b:current_syntax")
finish
endif
" load all of pandoc info, e.g. from
" https://github.com/vim-pandoc/vim-pandoc-syntax
runtime syntax/pandoc.vim
if exists("b:current_syntax")
let rmdIsPandoc = 1
unlet b:current_syntax
else
let rmdIsPandoc = 0
runtime syntax/markdown.vim
if exists("b:current_syntax")
unlet b:current_syntax
endif
" load all of the yaml syntax highlighting rules into @yaml
syntax include @yaml syntax/yaml.vim
if exists("b:current_syntax")
unlet b:current_syntax
endif
" highlight yaml block commonly used for front matter
syntax region rmdYamlBlock matchgroup=rmdYamlBlockDelim start="^---" matchgroup=rmdYamlBlockDelim end="^---" contains=@yaml keepend fold
endif
if !exists("g:rmd_syn_langs")
let g:rmd_syn_langs = ["r"]
else
let s:hasr = 0
for s:lng in g:rmd_syn_langs
if s:lng == "r"
let s:hasr = 1
endif
endfor
if s:hasr == 0
let g:rmd_syn_langs += ["r"]
endif
endif
for s:lng in g:rmd_syn_langs
exe 'syntax include @' . toupper(s:lng) . ' syntax/'. s:lng . '.vim'
if exists("b:current_syntax")
unlet b:current_syntax
endif
exe 'syntax region rmd' . toupper(s:lng) . 'Chunk start="^[ \t]*``` *{\(' . s:lng . '\|r.*engine\s*=\s*["' . "']" . s:lng . "['" . '"]\).*}$" end="^[ \t]*```$" contains=@' . toupper(s:lng) . ',rmd' . toupper(s:lng) . 'ChunkDelim keepend fold'
if exists("g:rmd_syn_hl_chunk") && s:lng == "r"
" highlight R code inside chunk header
syntax match rmdRChunkDelim "^[ \t]*```{r" contained
syntax match rmdRChunkDelim "}$" contained
else
exe 'syntax match rmd' . toupper(s:lng) . 'ChunkDelim "^[ \t]*```{\(' . s:lng . '\|r.*engine\s*=\s*["' . "']" . s:lng . "['" . '"]\).*}$" contained'
endif
exe 'syntax match rmd' . toupper(s:lng) . 'ChunkDelim "^[ \t]*```$" contained'
endfor
" also match and syntax highlight in-line R code
syntax region rmdrInline matchgroup=rmdInlineDelim start="`r " end="`" contains=@R containedin=pandocLaTeXRegion,yamlFlowString keepend
" I was not able to highlight rmdrInline inside a pandocLaTeXCommand, although
" highlighting works within pandocLaTeXRegion and yamlFlowString.
syntax cluster texMathZoneGroup add=rmdrInline
" match slidify special marker
syntax match rmdSlidifySpecial "\*\*\*"
if rmdIsPandoc == 0
syn match rmdBlockQuote /^\s*>.*\n\(.*\n\@<!\n\)*/ skipnl
" LaTeX
syntax include @LaTeX syntax/tex.vim
if exists("b:current_syntax")
unlet b:current_syntax
endif
" Inline
syntax match rmdLaTeXInlDelim "\$"
syntax match rmdLaTeXInlDelim "\\\$"
syn region texMathZoneX matchgroup=Delimiter start="\$" skip="\\\\\|\\\$" matchgroup=Delimiter end="\$" end="%stopzone\>" contains=@texMathZoneGroup
" Region
syntax match rmdLaTeXRegDelim "\$\$" contained
syntax match rmdLaTeXRegDelim "\$\$latex$" contained
syntax match rmdLaTeXSt "\\[a-zA-Z]\+"
syntax region rmdLaTeXRegion start="^\$\$" skip="\\\$" end="\$\$$" contains=@LaTeX,rmdLaTeXRegDelim keepend
syntax region rmdLaTeXRegion2 start="^\\\[" end="\\\]" contains=@LaTeX,rmdLaTeXRegDelim keepend
hi def link rmdBlockQuote Comment
hi def link rmdLaTeXSt Statement
hi def link rmdLaTeXInlDelim Special
hi def link rmdLaTeXRegDelim Special
endif
for s:lng in g:rmd_syn_langs
exe 'syn sync match rmd' . toupper(s:lng) . 'SyncChunk grouphere rmd' . toupper(s:lng) . 'Chunk /^[ \t]*``` *{\(' . s:lng . '\|r.*engine\s*=\s*["' . "']" . s:lng . "['" . '"]\)/'
endfor
hi def link rmdYamlBlockDelim Delim
for s:lng in g:rmd_syn_langs
exe 'hi def link rmd' . toupper(s:lng) . 'ChunkDelim Special'
endfor
hi def link rmdInlineDelim Special
hi def link rmdSlidifySpecial Special
let b:current_syntax = "rmd"
" vim: ts=8 sw=2
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