" Vim syntax file
" Language: eRuby
" Maintainer: Tim Pope <[email protected]>
" URL: https://github.com/vim-ruby/vim-ruby
" Release Coordinator: Doug Kearns <[email protected]>

if exists("b:current_syntax")
finish
endif

if !exists("main_syntax")
let main_syntax = 'eruby'
endif

if !exists("g:eruby_default_subtype")
let g:eruby_default_subtype = "html"
endif

if &filetype =~ '^eruby\.'
let b:eruby_subtype = matchstr(&filetype,'^eruby\.\zs\w\+')
elseif !exists("b:eruby_subtype") && main_syntax == 'eruby'
let s:lines = getline(1)."\n".getline(2)."\n".getline(3)."\n".getline(4)."\n".getline(5)."\n".getline("$")
let b:eruby_subtype = matchstr(s:lines,'eruby_subtype=\zs\w\+')
if b:eruby_subtype == ''
let b:eruby_subtype = matchstr(substitute(expand("%:t"),'\c\%(\.erb\|\.eruby\|\.erubis\)\+$','',''),'\.\zs\w\+$')
endif
if b:eruby_subtype == 'rhtml'
let b:eruby_subtype = 'html'
elseif b:eruby_subtype == 'rb'
let b:eruby_subtype = 'ruby'
elseif b:eruby_subtype == 'yml'
let b:eruby_subtype = 'yaml'
elseif b:eruby_subtype == 'js'
let b:eruby_subtype = 'javascript'
elseif b:eruby_subtype == 'txt'
" Conventional; not a real file type
let b:eruby_subtype = 'text'
elseif b:eruby_subtype == ''
let b:eruby_subtype = g:eruby_default_subtype
endif
endif

if !exists("b:eruby_nest_level")
let b:eruby_nest_level = strlen(substitute(substitute(substitute(expand("%:t"),'@','','g'),'\c\.\%(erb\|rhtml\)\>','@','g'),'[^@]','','g'))
endif
if !b:eruby_nest_level
let b:eruby_nest_level = 1
endif

if exists("b:eruby_subtype") && b:eruby_subtype != ''
exe "runtime! syntax/".b:eruby_subtype.".vim"
unlet! b:current_syntax
endif
syn include @rubyTop syntax/ruby.vim

syn cluster erubyRegions contains=erubyOneLiner,erubyBlock,erubyExpression,erubyComment

exe 'syn region erubyOneLiner matchgroup=erubyDelimiter start="^%\{1,'.b:eruby_nest_level.'\}%\@!" end="$" contains=@rubyTop containedin=ALLBUT,@erubyRegions keepend oneline'
exe 'syn region erubyBlock matchgroup=erubyDelimiter start="<%\{1,'.b:eruby_nest_level.'\}%\@!-\=" end="[=-]\=%\@<!%\{1,'.b:eruby_nest_level.'\}>" contains=@rubyTop containedin=ALLBUT,@erubyRegions keepend'
exe 'syn region erubyExpression matchgroup=erubyDelimiter start="<%\{1,'.b:eruby_nest_level.'\}=\{1,4}" end="[=-]\=%\@<!%\{1,'.b:eruby_nest_level.'\}>" contains=@rubyTop containedin=ALLBUT,@erubyRegions keepend'
exe 'syn region erubyComment matchgroup=erubyDelimiter start="<%\{1,'.b:eruby_nest_level.'\}-\=#" end="[=-]\=%\@<!%\{1,'.b:eruby_nest_level.'\}>" contains=rubyTodo,@Spell containedin=ALLBUT,@erubyRegions keepend'

" Define the default highlighting.

hi def link erubyDelimiter PreProc
hi def link erubyComment Comment

let b:current_syntax = 'eruby'

if main_syntax == 'eruby'
unlet main_syntax
endif

" vim: nowrap sw=2 sts=2 ts=8: