/
redcarpet_parser.rb
112 lines (97 loc) · 2.74 KB
/
redcarpet_parser.rb
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# frozen_string_literal: true
class Jekyll::Converters::Markdown::RedcarpetParser
module CommonMethods
def add_code_tags(code, lang)
code = code.to_s
code = code.sub(
%r!<pre>!,
"<pre><code class=\"language-#{lang}\" data-lang=\"#{lang}\">"
)
code = code.sub(%r!</pre>!, "</code></pre>")
code
end
end
module WithPygments
include CommonMethods
def block_code(code, lang)
unless defined?(Pygments)
Jekyll::External.require_with_graceful_fail("pygments")
end
lang = lang && lang.split.first || "text"
add_code_tags(
Pygments.highlight(
code,
{
:lexer => lang,
:options => { :encoding => "utf-8" },
}
),
lang
)
end
end
module WithoutHighlighting
require "cgi"
include CommonMethods
def code_wrap(code)
"<figure class=\"highlight\"><pre>#{CGI.escapeHTML(code)}</pre></figure>"
end
def block_code(code, lang)
lang = lang && lang.split.first || "text"
add_code_tags(code_wrap(code), lang)
end
end
module WithRouge
def block_code(_code, lang)
code = "<pre>#{super}</pre>"
"<div class=\"highlight\">#{add_code_tags(code, lang)}</div>"
end
protected
def rouge_formatter(_lexer)
Jekyll::Utils::Rouge.html_formatter(:wrap => false)
end
end
def initialize(config)
unless defined?(Redcarpet)
Jekyll::External.require_with_graceful_fail("redcarpet")
end
@config = config
@redcarpet_extensions = {}
@config["redcarpet"]["extensions"].each do |e|
@redcarpet_extensions[e.to_sym] = true
end
@renderer ||= class_with_proper_highlighter(@config["highlighter"])
end
def class_with_proper_highlighter(highlighter)
Class.new(Redcarpet::Render::HTML) do
case highlighter
when "pygments"
include WithPygments
when "rouge"
Jekyll::External.require_with_graceful_fail(%w(
rouge rouge/plugins/redcarpet
))
unless Gem::Version.new(Rouge.version) > Gem::Version.new("1.3.0")
abort "Please install Rouge 1.3.0 or greater and try running Jekyll again."
end
include Rouge::Plugins::Redcarpet
include CommonMethods
include WithRouge
else
include WithoutHighlighting
end
end
end
def convert(content)
@redcarpet_extensions[:fenced_code_blocks] = \
!@redcarpet_extensions[:no_fenced_code_blocks]
if @redcarpet_extensions[:smart]
@renderer.send :include, Redcarpet::Render::SmartyPants
end
markdown = Redcarpet::Markdown.new(
@renderer.new(@redcarpet_extensions),
@redcarpet_extensions
)
markdown.render(content)
end
end