Class: Gollum::Filter::Tags

Inherits:
Gollum::Filter show all
Defined in:
lib/gollum-lib/filter/tags.rb

Overview

Render all tags (things in double-square-brackets). This one’s a biggie.

Instance Method Summary collapse

Methods inherited from Gollum::Filter

#initialize

Methods included from Helpers

#trim_leading_slash

Constructor Details

This class inherits a constructor from Gollum::Filter

Instance Method Details

#extract(data) ⇒ Object

Extract all tags into the tagmap and replace with placeholders.



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# File 'lib/gollum-lib/filter/tags.rb', line 6

def extract(data)
  return data if @markup.format == :txt || @markup.format == :asciidoc
  data.gsub!(/(.?)\[\[(.+?)\]\]([^\[]?)/m) do
    if Regexp.last_match[1] == "'" && Regexp.last_match[3] != "'"
      "[[#{Regexp.last_match[2]}]]#{Regexp.last_match[3]}"
    elsif Regexp.last_match[2].include?('][')
      if Regexp.last_match[2][0..4] == 'file:'
        pre            = Regexp.last_match[1]
        post           = Regexp.last_match[3]
        parts          = Regexp.last_match[2].split('][')
        parts[0][0..4] = ""
        link           = "#{parts[1]}|#{parts[0].sub(/\.org/, '')}"
        id             = register_tag(link)
        "#{pre}#{id}#{post}"
      else
        Regexp.last_match[0]
      end
    else
      id = register_tag(Regexp.last_match[2])
      "#{Regexp.last_match[1]}#{id}#{Regexp.last_match[3]}"
    end
  end
  data
end

#process(rendered_data) ⇒ Object

Process all text nodes from the doc and replace the placeholders with the final markup.



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# File 'lib/gollum-lib/filter/tags.rb', line 39

def process(rendered_data)
  doc  = Nokogiri::HTML::DocumentFragment.parse(rendered_data)
  doc.traverse do |node|
    if node.text? then
      content = node.content
      content.gsub!(/TAG[a-f0-9]+TAG/) do |id|
        if (tag = @map[id]) then
          if is_preformatted?(node) then
            "[[#{tag}]]"
          else
            process_tag(tag).gsub('%2f', '/')
          end
        end
      end
      node.replace(content) if content != node.content
    end
  end

  doc.to_html
end

#register_tag(tag) ⇒ Object 



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# File 'lib/gollum-lib/filter/tags.rb', line 31

def register_tag(tag)
  id       = "TAG#{Digest::SHA1.hexdigest(tag)}TAG"
  @map[id] = tag
  id
end