Module: UltraMarkdown::Filter::CodeBlock

Includes:
ERB::Util
Included in:
SyntaxConverter
Defined in:
lib/ultra_markdown/filter/code_block.rb

Constant Summary collapse

AllOptions =

for code_block

/([^\s]+)\s+(.+?)\s+(https?:\/\/\S+|\/\S+)\s*(.+)?/i
LangCaption = 
/([^\s]+)\s*(.+)?/i
CaptionUrlTitle =

for liquid_code_block

/(\S[\S\s]*)\s+(https?:\/\/\S+|\/\S+)\s*(.+)?/i
Caption = 
/(\S[\S\s]*)/

Instance Method Summary collapse

Instance Method Details

#block_code(code, language) ⇒ Object 



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# File 'lib/ultra_markdown/filter/code_block.rb', line 100

def block_code(code, language)
  Pygments.highlight(code, :lexer => language)
rescue => e
  return Pygments.highlight(code, :lexer => nil)
end

#code_block(input) ⇒ Object

convert “‘ruby title “` like code block



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# File 'lib/ultra_markdown/filter/code_block.rb', line 19

def code_block(input)
    
  input.gsub!(/^`{3} *([^\n]+)?\n(.+?)\n`{3}/m) do
    caption = nil
    options = $1 || ''
    lang = nil
    str = $2
    
    if options =~ AllOptions
      lang = $1
      caption = "<figcaption><span>#{$2}\n</span><a href='#{$3}'>#{$4 || 'link'}</a></figcaption>"
    elsif options =~ LangCaption
      lang = $1
      caption = "<figcaption><span>#{$2}\n</span></figcaption>"
    end
    
    if str.match(/\A( {4}|\t)/)
      str = str.gsub(/^( {4}|\t)/, '')
    end
    
    render_octopress_like_code_block(lang, str, caption, options)
  end
end

#codespan(code) ⇒ Object 



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# File 'lib/ultra_markdown/filter/code_block.rb', line 106

def codespan(code)
  return "" if !code
    
  if code[0] == "$" && code[-1] == "$"
    code.gsub!(/^\$/,'')
    code.gsub!(/\$$/,'')
    "<script type=\"math/tex\">#{code}</script>"
  else
    "<code>#{ERB::Util.html_escape(code)}</code>"
  end
end

#liquid_code_block(input) ⇒ Object 



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# File 'lib/ultra_markdown/filter/code_block.rb', line 44

def liquid_code_block(input)
    
  input.gsub!(/^\{\% *codeblock([^\n\}]+)?\%\}.?\n?(.+?)\{\% *endcodeblock *\%\}/m) do
    caption = nil
    options = $1
    str = $2
    lang = nil
    
    if options =~ /\s*lang:(\S+)/i
      lang = $1
      options = options.sub(/\s*lang:(\S+)/i,'')
    end
    
    if options =~ CaptionUrlTitle
      file = $1
      caption = "<figcaption><span>#{$1}\n</span><a href='#{$2}'>#{$3 || 'link'}</a></figcaption>"
    elsif options =~ Caption
      file = $1
      caption = "<figcaption><span>#{$1}\n</span></figcaption>"
    end
    if file =~ /\S[\S\s]*\w+\.(\w+)/ && lang.nil?
      lang = $1
    end
    
    if str.match(/\A( {4}|\t)/)
      str = str.gsub(/^( {4}|\t)/, '')
    end
    
    render_octopress_like_code_block(lang, str, caption, options)
  end
end

#render_octopress_like_code_block(lang, str, caption, options) ⇒ Object 



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# File 'lib/ultra_markdown/filter/code_block.rb', line 77

def render_octopress_like_code_block(lang, str, caption, options)
  if is_rss
    code = block_code(str, "text")
    "<figure class='figure-code code'>#{caption}#{code}</figure>"
  elsif lang.nil? || lang == 'plain'
    code = block_code(str, nil)
    "<figure class='figure-code code'>#{caption}#{code}</figure>"
  elsif lang == 'mathjax'
    "<script type=\"math/tex; mode=display\">#{str}</script>"
  else
    if lang.include? "-raw"
      raw = "``` #{options.sub('-raw', '')}\n"
      raw += str
      raw += "\n```\n"
    else
      code = block_code(str, lang)
      "<figure class='figure-code code'>#{caption}#{code}</figure>"
    end
  end
end