Class: Daimon::Markdown::Filter::Plugin

Inherits:
HTML::Pipeline::Filter
  • Object
show all
Defined in:
lib/daimon/markdown/filter/plugin.rb

Instance Method Summary collapse

Instance Method Details

#call ⇒ Object 



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# File 'lib/daimon/markdown/filter/plugin.rb', line 7

def call
  doc.search(".//text()").each do |node|
    next if node.parent.name == "code" # skip code block
    result[:plugins] = []
    node.to_s.scan(/{{(.+?)}}/m) do |str|
      begin
        parser = Daimon::Markdown::Parser.new(str[0])
        parser.parse
        plugin_class = Daimon::Markdown::Plugin.lookup(parser.name)
        plugin = plugin_class.new(doc, node, result, context)
        plugin.call(*parser.args)
      rescue Daimon::Markdown::Parser::Error => ex
        message = "#{node} (#{ex.class}: #{ex.message})"
        node.replace(message)
      rescue Daimon::Markdown::Plugin::UnknownPluginError => ex
        node.replace(ex.message)
      end
    end
    unless result[:plugins].empty?
      scanner = StringScanner.new(node.to_s)
      new_node = ""
      loop do
        if scanner.match?(/{{.+?}}/)
          new_node << result[:plugins].shift
          scanner.pos += scanner.matched_size
        else
          new_node << scanner.getch
        end
        break if scanner.eos?
      end
      node.replace(new_node)
    end
  end
  doc
end