# frozen_string_literal: true module RailsGuides class Markdown class Renderer < Redcarpet::Render::HTML cattr_accessor :edge, :version def block_code(code, language) <<-HTML
#{ERB::Util.h(code)}
HTML end def link(url, title, content) if %r{https?://api\.rubyonrails\.org}.match?(url) %(#{content}) elsif title %(#{content}) else %(#{content}) end 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 header_with_id = text.scan(/(.*){#(.*)}/) unless header_with_id.empty? %(#{header_with_id[0][0].strip}) else %(#{text}) end end def paragraph(text) if text =~ %r{^NOTE:\s+Defined\s+in\s+(.*?)\.?$} %(

Defined in #{$1}.

) elsif /^(TIP|IMPORTANT|CAUTION|WARNING|NOTE|INFO|TODO)[.:]/.match?(text) 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 def github_file_url(file_path) tree = version || edge root = file_path[%r{(\w+)/}, 1] path = \ case root when "abstract_controller", "action_controller", "action_dispatch" "actionpack/lib/#{file_path}" when /\A(action|active)_/ "#{root.sub("_", "")}/lib/#{file_path}" else file_path end "https://github.com/rails/rails/tree/#{tree}/#{path}" end def api_link(url) if %r{https?://api\.rubyonrails\.org/v\d+\.}.match?(url) url elsif edge url.sub("api", "edgeapi") else url.sub(/(?<=\.org)/, "/#{version}") end end end end end