Class: Octopress::Codefence::Highlighter

Inherits:
Object
  • Object
show all
Defined in:
lib/octopress-codefence.rb

Constant Summary collapse

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

Instance Method Summary collapse

Constructor Details

#initialize(input, ext = nil, aliases = nil) ⇒ Highlighter

Returns a new instance of Highlighter.



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# File 'lib/octopress-codefence.rb', line 19

def initialize(input, ext=nil, aliases=nil)
  @input   = input
  @ext     = ext
  @aliases = aliases
end

Instance Method Details

#get_code(code, options) ⇒ Object 



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# File 'lib/octopress-codefence.rb', line 89

def get_code(code, options)
  options[:aliases] = @aliases || {}
  code = CodeHighlighter.highlight(code, options)
  code = "<notextile>#{code}</notextile>" if !@ext.nil? and @ext.match(/textile/)
  code
end

#get_options(markup) ⇒ Object 



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# File 'lib/octopress-codefence.rb', line 68

def get_options(markup)
  defaults = { escape: true }
  clean_markup = CodeHighlighter.clean_markup(markup)

  if clean_markup =~ AllOptions
    defaults = {
      lang: $1,
      title: $2,
      url: $3,
      link_text: $4,
    }
  elsif clean_markup =~ LangCaption
    defaults = {
      lang: $1,
      title: $2
    }
  end
  CodeHighlighter.parse_markup(markup, defaults)
end

#render ⇒ Object 



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# File 'lib/octopress-codefence.rb', line 25

def render
  @input.encode!("UTF-8")
  @input = sub_option_comment(@input)

  # Match code bwteen backticks
  #
  @input.gsub /^`{3}(.+?)`{3}/m do
    str = $1.to_s

    # separate code from arguments after backticks
    #
    str.gsub /([^\n]+)?\n(.+?)\Z/m do
      markup = $1 || ''
      code = $2.to_s
      begin
        get_code(code, get_options(markup))
      rescue => e
        markup = "```#{markup}"
        CodeHighlighter.highlight_failed(e, "```[language] [title] [url] [link text] [linenos:false] [start:#] [mark:#,#-#]\ncode\n```", markup, code)
      end
    end
  end
end

#sub_option_comment(input) ⇒ Object

Allow html comments to set rendering options

Example:
 <!-- title:"Example 1" -->
 ```ruby

This becomes:

 ```ruby title:"Example 1"

This allows Readme files to be rendered by GitHub and other markdown codefences But when processed by Octopress Codefence, the code examples are rendered with options



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# File 'lib/octopress-codefence.rb', line 62

def sub_option_comment(input)
  input.gsub /<!--(.+?)-->\n`{3}([^\n]+)/ do
    "```#{$2} #{$1}"
  end
end