" Vim indent 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:did_indent")
finish
endif

runtime! indent/ruby.vim
unlet! b:did_indent
setlocal indentexpr=

if exists("b:eruby_subtype")
exe "runtime! indent/".b:eruby_subtype.".vim"
else
runtime! indent/html.vim
endif
unlet! b:did_indent

if &l:indentexpr == ''
if &l:cindent
let &l:indentexpr = 'cindent(v:lnum)'
else
let &l:indentexpr = 'indent(prevnonblank(v:lnum-1))'
endif
endif
let b:eruby_subtype_indentexpr = &l:indentexpr

let b:did_indent = 1

setlocal indentexpr=GetErubyIndent()
setlocal indentkeys=o,O,*<Return>,<>>,{,},0),0],o,O,!^F,=end,=else,=elsif,=rescue,=ensure,=when

" Only define the function once.
if exists("*GetErubyIndent")
finish
endif

function! GetErubyIndent(...)
if a:0 && a:1 == '.'
let v:lnum = line('.')
elseif a:0 && a:1 =~ '^\d'
let v:lnum = a:1
endif
let vcol = col('.')
call cursor(v:lnum,1)
let inruby = searchpair('<%','','%>','W')
call cursor(v:lnum,vcol)
if inruby && getline(v:lnum) !~ '^<%\|^\s*[-=]\=%>'
let ind = GetRubyIndent(v:lnum)
else
exe "let ind = ".b:eruby_subtype_indentexpr
endif
let lnum = prevnonblank(v:lnum-1)
let line = getline(lnum)
let cline = getline(v:lnum)
if cline =~# '^\s*<%[-=]\=\s*\%(}\|end\|else\|\%(ensure\|rescue\|elsif\|when\).\{-\}\)\s*\%([-=]\=%>\|$\)'
let ind = ind - &sw
endif
if line =~# '\S\s*<%[-=]\=\s*\%(}\|end\).\{-\}\s*\%([-=]\=%>\|$\)'
let ind = ind - &sw
endif
if line =~# '\%({\|\<do\)\%(\s*|[^|]*|\)\=\s*[-=]\=%>'
let ind = ind + &sw
elseif line =~# '<%[-=]\=\s*\%(module\|class\|def\|if\|for\|while\|until\|else\|elsif\|case\|when\|unless\|begin\|ensure\|rescue\)\>.*%>'
let ind = ind + &sw
endif
if line =~# '^\s*<%[=#-]\=\s*$' && cline !~# '^\s*end\>'
let ind = ind + &sw
endif
if line !~# '^\s*<%' && line =~# '%>\s*$'
let ind = ind - &sw
endif
if cline =~# '^\s*[-=]\=%>\s*$'
let ind = ind - &sw
endif
return ind
endfunction

" vim:set sw=2 sts=2 ts=8 noet: