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require "github/markup/implementation"
module GitHub
module Markup
class Markdown < Implementation
MARKDOWN_GEMS = {
"commonmarker" => proc { |content|
CommonMarker.render_html(content, :GITHUB_PRE_LANG, [:tagfilter, :autolink, :table, :strikethrough])
},
"github/markdown" => proc { |content|
GitHub::Markdown.render(content)
},
"redcarpet" => proc { |content|
Redcarpet::Markdown.new(Redcarpet::Render::HTML).render(content)
},
"rdiscount" => proc { |content|
RDiscount.new(content).to_html
},
"maruku" => proc { |content|
Maruku.new(content).to_html
},
"kramdown" => proc { |content|
Kramdown::Document.new(content).to_html
},
"bluecloth" => proc { |content|
BlueCloth.new(content).to_html
},
}
def initialize
super(
/md|rmd|mkdn?|mdwn|mdown|markdown|litcoffee/i,
["Markdown", "RMarkdown", "Literate CoffeeScript"])
end
def load
return if @renderer
MARKDOWN_GEMS.each do |gem_name, renderer|
if try_require(gem_name)
@renderer = renderer
return
end
end
raise LoadError, "no suitable markdown gem found"
end
def render(filename, content)
load
@renderer.call(content)
end
def name
"markdown"
end
private
def try_require(file)
require file
true
rescue LoadError
false
end
end
end
end
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