cciollaro/tree_builder.rb

## tree_builder.rb
class Tree
  attr_accessor :elements

  def initialize(&block)
    @elements = ''
    instance_eval(&block)
  end

  def method_missing(method_name, *args, &block)
    @elements << "<#{method_name}>"
    yield if block
    @elements << "</#{method_name}>"
  end

  def inspect
    puts @elements
  end
end

Tree.new do
  table do
    tr do
      td
      td
    end
  end
end.inspect
#<table><tr><td></td><td></td></tr></table>

class HtmlBuilder
  attr_accessor :result

  def initialize(&block)
    @result = '<html>'
    instance_eval(&block)
    @result << '</html>'
  end

  def method_missing(method_name, *args, &block)
    @result << "<#{method_name}"
    @result << parse_args(args.last) if args.last.is_a?(Hash)
    @result << ">"
    yield if block
    @result << "</#{method_name}>"
  end

  def text(str)
    @result << str
  end

  def parse_args(args)
    ret = ' '
    args.each_pair {|key, value| ret << "#{key}=\"#{value}\""}
    ret
  end

  def inspect
    puts @result
  end
end

HtmlBuilder.new do
  title do
    text "whatup"
  end
  body :onload => "alert('hi')" do
    div :id => "hi", :class => "bye" do
      text "hi_again"
    end
  end
end.inspect
#<html><title>whatup</title><body onload="alert('hi')"><div id="hi"class="bye">hi_again</div></body></html>
	class Tree
	attr_accessor :elements

	def initialize(&block)
	@elements = ''
	instance_eval(&block)
	end

	def method_missing(method_name, *args, &block)
	@elements << "<#{method_name}>"
	yield if block
	@elements << "</#{method_name}>"
	end

	def inspect
	puts @elements
	end
	end

	Tree.new do
	table do
	tr do
	td
	td
	end
	end
	end.inspect
	#<table><tr><td></td><td></td></tr></table>

	class HtmlBuilder
	attr_accessor :result

	def initialize(&block)
	@result = '<html>'
	instance_eval(&block)
	@result << '</html>'
	end

	def method_missing(method_name, *args, &block)
	@result << "<#{method_name}"
	@result << parse_args(args.last) if args.last.is_a?(Hash)
	@result << ">"
	yield if block
	@result << "</#{method_name}>"
	end

	def text(str)
	@result << str
	end

	def parse_args(args)
	ret = ' '
	args.each_pair {\|key, value\| ret << "#{key}=\"#{value}\""}
	ret
	end

	def inspect
	puts @result
	end
	end

	HtmlBuilder.new do
	title do
	text "whatup"
	end
	body :onload => "alert('hi')" do
	div :id => "hi", :class => "bye" do
	text "hi_again"
	end
	end
	end.inspect
	#<html><title>whatup</title><body onload="alert('hi')"><div id="hi"class="bye">hi_again</div></body></html>