101 lines
2.8 KiB
Ruby
101 lines
2.8 KiB
Ruby
require 'redcarpet'
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require 'active_support/core_ext/module/attribute_accessors'
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module Middleman
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module Renderers
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class RedcarpetTemplate < ::Tilt::RedcarpetTemplate::Redcarpet2
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# because tilt has decided to convert these
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# in the wrong direction
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ALIASES = {
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escape_html: :filter_html
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}.freeze
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def initialize(*args, &block)
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super
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@context = @options[:context] if @options.key?(:context)
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end
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# Overwrite built-in Tilt version.
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# Don't overload :renderer option with smartypants
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# Support renderer-level options
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def generate_renderer
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return options.delete(:renderer) if options.key?(:renderer)
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covert_options_to_aliases!
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# Pick a renderer
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renderer = MiddlemanRedcarpetHTML
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if options.delete(:smartypants)
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# Support SmartyPants
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renderer = Class.new(renderer) do
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include ::Redcarpet::Render::SmartyPants
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end
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end
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# Renderer Options
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possible_render_opts = [:filter_html, :no_images, :no_links, :no_styles, :safe_links_only, :with_toc_data, :hard_wrap, :xhtml, :prettify, :link_attributes]
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render_options = possible_render_opts.each_with_object({}) do |opt, sum|
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sum[opt] = options.delete(opt) if options.key?(opt)
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end
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renderer.new(render_options)
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end
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def evaluate(scope, _)
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@output ||= begin
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MiddlemanRedcarpetHTML.scope = @context || scope
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@engine.render(data)
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end
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end
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private
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def covert_options_to_aliases!
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ALIASES.each do |aka, actual|
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options[actual] = options.delete(aka) if options.key? aka
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end
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end
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end
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# Custom Redcarpet renderer that uses our helpers for images and links
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class MiddlemanRedcarpetHTML < ::Redcarpet::Render::HTML
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cattr_accessor :scope
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def initialize(options={})
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@local_options = options.dup
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super
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end
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def image(link, title, alt_text)
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if !@local_options[:no_images]
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scope.image_tag(link, title: title, alt: alt_text)
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else
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link_string = link.dup
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link_string << %("#{title}") if title && title.length > 0 && title != alt_text
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""
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end
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end
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def link(link, title, content)
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if !@local_options[:no_links]
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attributes = { title: title }
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attributes.merge!(@local_options[:link_attributes]) if @local_options[:link_attributes]
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scope.link_to(content, link, attributes)
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else
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link_string = link.dup
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link_string << %("#{title}") if title && title.length > 0 && title != alt_text
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"[#{content}](#{link_string})"
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end
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end
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end
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::Tilt.register RedcarpetTemplate, 'markdown', 'mkd', 'md'
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end
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end
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