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# frozen_string_literal: true
# = Markdown (<tt>markdown</tt>, <tt>md</tt>, <tt>mkd</tt>)
#
# {Markdown}[http://daringfireball.net/projects/markdown/syntax] is a
# lightweight markup language, created by John Gruber and Aaron Swartz.
# For any markup that is not covered by Markdown’s syntax, HTML is used.
# Marking up plain text with Markdown markup is easy and Markdown
# formatted texts are readable.
#
# === Example
#
# Hello Markdown Templates
# ========================
#
# Hello World. This is a paragraph.
#
# === Usage
#
# To wrap a Markdown formatted document with a layout:
#
# layout = Tilt['erb'].new do
# "<!doctype html><title></title><%= yield %>"
# end
# data = Tilt['md'].new { "# hello tilt" }
# layout.render { data.render }
# # => "<!doctype html><title></title><h1>hello tilt</h1>\n"
#
# === Options
#
# ==== <tt>:smartypants => true|false</tt>
#
# Set <tt>true</tt> to enable [Smarty Pants][smartypants] style punctuation replacement.
#
# ==== <tt>:escape_html => true|false</tt>
#
# Set <tt>true</tt> disallow raw HTML in Markdown contents. HTML is converted to
# literal text by escaping <tt><</tt> characters.
#
# === See also
#
# * {Markdown Syntax Documentation}[http://daringfireball.net/projects/markdown/syntax]
# * {Pandoc}[http://pandoc.org]
require_relative 'template'
require 'pandoc-ruby'
Tilt::PandocTemplate = Tilt::StaticTemplate.subclass do
# turn options hash into an array
# Map tilt options to pandoc options
# Replace hash keys with value true with symbol for key
# Remove hash keys with value false
# Leave other hash keys untouched
pandoc_options = []
from = "markdown"
smart_extension = "-smart"
@options.each do |k,v|
case k
when :smartypants
smart_extension = "+smart" if v
when :escape_html
from = "markdown-raw_html" if v
when :commonmark
from = "commonmark" if v
when :markdown_strict
from = "markdown_strict" if v
else
case v
when true
pandoc_options << k
when false
# do nothing
else
pandoc_options << { k => v }
end
end
end
pandoc_options << { :f => from + smart_extension }
PandocRuby.new(@data, *pandoc_options).to_html.strip
end
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