bluecloth.vim

function! s:BlueCloth(line1, line2)
ruby << EOF 
    require 'rubygems'
    require 'bluecloth'
 
    firstline = VIM::evaluate('a:line1').to_i
    lastline  = VIM::evaluate('a:line2').to_i
 
    text = []
    for i in firstline .. lastline
        text.push $curbuf[i]
    end 
 
    parse_text = BlueCloth.new(text.join("\n")).to_html.split("\n").reverse!
 
    parse_text.each do |line|
        $curbuf.append(lastline, line)
    end 
 
    for i in firstline .. lastline
        $curbuf.delete(firstline)
    end 
EOF
endfunction
 
command! -range=% BlueCloth :call <SID>BlueCloth(<line1>, <line2>)