Class: DaimonMarkdown::Filter::Plugin

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

Instance Method Summary collapse

Instance Method Details

#callObject



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# File 'lib/daimon_markdown/filter/plugin.rb', line 6

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 = DaimonMarkdown::Parser.new(str[0])
        parser.parse
        plugin_class = DaimonMarkdown::Plugin.lookup(parser.name)
        plugin = plugin_class.new(doc, node, result, context)
        plugin.call(*parser.args)
      rescue DaimonMarkdown::Parser::Error => ex
        message = "#{node} (#{ex.class}: #{ex.message})"
        node.replace(message)
      rescue DaimonMarkdown::Plugin::UnknownPluginError => ex
        node.replace(ex.message)
      rescue DaimonMarkdown::Plugin::Error => ex
        message = "        <pre>Error occured in \#{plugin_class}\n        \#{node} (\#{ex.class}: \#{ex.message})\n        \#{ex.backtrace.join(\"\\n\")}</pre>\n        MESSAGE\n        node.parent.replace(message)\n      rescue => ex\n        message = <<~MESSAGE\n        <pre>Unexpected error occured in \#{plugin_class}\n        \#{node} (\#{ex.class}: \#{ex.message})\n        \#{ex.backtrace.join(\"\\n\")}</pre>\n        MESSAGE\n        node.parent.replace(message)\n      end\n    end\n    unless result[:plugins].empty?\n      scanner = StringScanner.new(node.to_s)\n      new_node = \"\"\n      loop do\n        if scanner.match?(/{{.+?}}/)\n          new_node << result[:plugins].shift\n          scanner.pos += scanner.matched_size\n        else\n          new_node << scanner.getch\n        end\n        break if scanner.eos?\n      end\n      node.replace(new_node)\n    end\n  end\n  doc\nend\n"