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.



29
30
31
32
33
 
# File 'lib/octopress-codefence.rb', line 29

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

Instance Method Details

#get_code(code, options) ⇒ Object 



93
94
95
96
97
98
 
# File 'lib/octopress-codefence.rb', line 93

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 



72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
 
# File 'lib/octopress-codefence.rb', line 72

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 



35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
 
# File 'lib/octopress-codefence.rb', line 35

def render
  @input.encode!("UTF-8")
  @input = sub_option_comment(@input)
  @input.gsub /^`{3}(.+?)`{3}/m do
    str = $1.to_s
    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



66
67
68
69
70
 
# File 'lib/octopress-codefence.rb', line 66

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