module RailsGuides class Markdown class Renderer < Redcarpet::Render::HTML def initialize(options = {}) super end def block_code(code, language) <<-HTML
#{ERB::Util.h(code)}
HTML end def header(text, header_level) # Always increase the heading level by 1, so we can use h1, h2 heading in the document header_level += 1 %(#{text}) end def paragraph(text) if text =~ /^(TIP|IMPORTANT|CAUTION|WARNING|NOTE|INFO|TODO)[.:]/ convert_notes(text) elsif text.include?("DO NOT READ THIS FILE ON GITHUB") elsif text =~ /^\[(\d+)\]:<\/sup> (.+)$/ linkback = %(#{$1}) %(

#{linkback} #{$2}

) else text = convert_footnotes(text) "

#{text}

" end end private def convert_footnotes(text) text.gsub(/\[(\d+)\]<\/sup>/i) do %() + %(#{$1}) end end def brush_for(code_type) case code_type when "ruby", "sql", "plain" code_type when "erb", "html+erb" "ruby; html-script: true" when "html" "xml" # HTML is understood, but there are .xml rules in the CSS else "plain" end end def convert_notes(body) # The following regexp detects special labels followed by a # paragraph, perhaps at the end of the document. # # It is important that we do not eat more than one newline # because formatting may be wrong otherwise. For example, # if a bulleted list follows the first item is not rendered # as a list item, but as a paragraph starting with a plain # asterisk. body.gsub(/^(TIP|IMPORTANT|CAUTION|WARNING|NOTE|INFO|TODO)[.:](.*?)(\n(?=\n)|\Z)/m) do css_class = \ case $1 when "CAUTION", "IMPORTANT" "warning" when "TIP" "info" else $1.downcase end %(

#{$2.strip}

) end end end end end