require 'cgi'

module Iowa

# Superclass for all Iowa tags.  Tag provides a self referential
# method to determine the tag's name, and to output opening and closing
# HTML representations of the tag.

class Tag < Element

	# Return the name of the tag.

	def tagName
		self.class.name.split("::").last.downcase
	end
		
	# Output the HTML to open the tag.

	def openTag(*args)
		if args.first.is_a? Hash
			extraAttributes = args.first
		else
			extraAttributes = Hash[*args]
		end
		
		newAttributes = @attributes.dup.update(extraAttributes)
		tag = "<#{tagName}"
		newAttributes.each do |key, value| 
			if value
				value = CGI::escapeHTML(value.to_s)
				tag += " #{key}=\"#{value}\""
			else
				tag += " #{key}"
			end
		end
		tag += ">"
	end
	
	# Output the HTML to close the tag.

	def closeTag
		"</#{tagName}>"
	end
end

end