Jason Zimdars
82 lines
2.1 KiB
Ruby
82 lines
2.1 KiB
Ruby
require "rouge/plugins/redcarpet"
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class MarkdownRenderer < Redcarpet::Render::HTML
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include Rouge::Plugins::Redcarpet
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def self.build
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Redcarpet::Markdown.new MarkdownRenderer.new(filter_html: false),
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autolink: true, highlight: true, no_intra_emphasis: true,
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fenced_code_blocks: true, lax_spacing: true, strikethrough: true, tables: true
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end
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def initialize(...)
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super
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@id_counts = Hash.new 0
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end
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def header(text, header_level)
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unique_id(text).then do |id|
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<<~HTML.chomp
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<h#{header_level} id="#{id}">
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#{text} <a href="##{id}" class="heading__link" aria-hidden="true">#</a>
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</h#{header_level}>
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HTML
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end
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end
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def image(url, title, alt_text)
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<<~HTML.chomp
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<a title="#{title}" href="#{url}" data-action="lightbox#open:prevent" data-lightbox-target="image" data-lightbox-url-value="#{url}?disposition=attachment">
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<img src="#{url}" alt="#{alt_text}">
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</a>
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HTML
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end
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def code_block(code, language)
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block_code(code, language) # call Rouge Redcarpet plugin
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end
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def link(url, title, content)
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return video_tag(url, title) if video_url?(url)
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attributes = { href: url }
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attributes[:title] = title if title
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attributes["data-turbo-frame"] = "_top"
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"<a #{html_attributes(attributes)}>#{content}</a>"
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end
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def autolink(url, link_type)
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attributes = { href: url }
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attributes["data-turbo-frame"] = "_top"
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"<a #{html_attributes(attributes)}>#{url}</a>"
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end
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private
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attr_reader :id_counts
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def html_attributes(attributes)
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attributes.map { |key, value| %Q(#{key}="#{value}") }.join(" ")
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end
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def unique_id(text)
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text.parameterize.then do |base_id|
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id_counts[base_id] += 1
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id_counts[base_id] > 1 ? "#{base_id}-#{id_counts[base_id]}" : base_id
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end
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end
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def video_url?(url)
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File.extname(url).downcase.match?(/\.(mp4|webm|ogg)/)
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end
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def video_tag(url, title)
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<<~HTML.chomp
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<video controls title="#{title}" width="1024">
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<source src="#{url}" type="video/#{File.extname(url).delete('.')}">
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</video>
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HTML
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end
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end
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