module Padrino::Helpers::TagHelpers

def content_tag(*args, &block)
  name = args.first
  options = args.extract_options!
  tag_html = block_given? ? capture_html(&block) : args[1]
  tag_result = tag(name, options.merge(:content => tag_html))
  block_is_template?(block) ? concat_content(tag_result) : tag_result
end

def escape_value(string)
  string.to_s.gsub(Regexp.union(*ESCAPE_VALUES.keys)){|c| ESCAPE_VALUES[c] }
end

def identity_tag_attributes
  [:checked, :disabled, :selected, :multiple]
end

def input_tag(type, options = {})
  options.reverse_merge!(:type => type)
  tag(:input, options)
end

def tag(name, options={})
  content, open_tag = options.delete(:content), options.delete(:open)
  content = content.join("\n") if content.respond_to?(:join)
  identity_tag_attributes.each { |attr| options[attr] = attr.to_s if options[attr]  }
  html_attrs = options.map { |a, v| v.nil? || v == false ? nil : "#{a}=\"#{escape_value(v)}\"" }.compact.join(" ")
  base_tag = (html_attrs.present? ? "<#{name} #{html_attrs}" : "<#{name}")
  base_tag << (open_tag ? ">" : (content ? ">#{content}</#{name}>" : " />"))
end