99 lines
3.2 KiB
Ruby
99 lines
3.2 KiB
Ruby
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# We define the an additional option for the kramdown parser to look for
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module Kramdown
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module Options
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define(:kramdown_default_lang, Symbol, nil, <<EOF)
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Sets the default language for highlighting code blocks
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If no language is set for a code block, the default language is used
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instead. The value has to be one of the languages supported by pygments
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or nil if no default language should be used.
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Default: nil
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Used by: PygmentsHtml converter
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EOF
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end
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end
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# This class is a plugin for kramdown, to make it use pygments instead of coderay
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# It has nothing to do with Jekyll, it is simply used by the custom converter below
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module Kramdown
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module Converter
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class PygmentsHtml < Html
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begin
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require 'pygments'
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rescue LoadError
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STDERR.puts 'You are missing a library required for syntax highlighting. Please run:'
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STDERR.puts ' $ [sudo] gem install pygments'
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raise FatalException.new("Missing dependency: Pygments")
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end
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def extract_code_language_with_fix!(attr)
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lang = extract_code_language!(attr) || @options[:kramdown_default_lang]
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lang = "bash" if lang == "shell"
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lang
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end
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def convert_codeblock(el, indent)
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attr = el.attr.dup
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lang = extract_code_language_with_fix!(attr)
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code = pygmentize(el.value, lang)
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code_attr = {}
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code_attr['class'] = "language-#{lang}" if lang
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"#{' '*indent}<div class=\"highlight\"><pre#{html_attributes(attr)}><code#{html_attributes(code_attr)}>#{code}</code></pre></div>\n"
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end
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def convert_codespan(el, indent)
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attr = el.attr.dup
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lang = extract_code_language_with_fix!(attr)
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code = pygmentize(el.value, lang)
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if lang
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attr['class'] = "highlight"
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if attr.has_key?('class')
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attr['class'] += " language-#{lang}"
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else
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attr['class'] = "language-#{lang}"
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end
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end
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"<code#{html_attributes(attr)}>#{code}</code>"
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end
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def pygmentize(code, lang)
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if lang
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Pygments.highlight(code,
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:lexer => lang,
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:options => { :startinline => true, :encoding => 'utf-8', :nowrap => true })
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else
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escape_html(code)
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end
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end
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end
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end
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end
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# This class is the actual custom Jekyll converter.
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class Jekyll::Converters::Markdown::KramdownPygments
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def initialize(config)
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require 'kramdown'
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@config = config
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rescue LoadError
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STDERR.puts 'You are missing a library required for Markdown. Please run:'
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STDERR.puts ' $ [sudo] gem install kramdown'
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raise FatalException.new("Missing dependency: kramdown")
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end
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def convert(content)
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html = Kramdown::Document.new(content, {
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:auto_ids => @config['kramdown']['auto_ids'],
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:footnote_nr => @config['kramdown']['footnote_nr'],
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:entity_output => @config['kramdown']['entity_output'],
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:toc_levels => @config['kramdown']['toc_levels'],
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:smart_quotes => @config['kramdown']['smart_quotes'],
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:kramdown_default_lang => @config['kramdown']['default_lang'],
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:input => @config['kramdown']['input']
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}).to_pygments_html
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return html;
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end
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end
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