module MasterView
  module Directives

    # outputs a block around the text tags, if left bracket count is higher than right
    # assume that the end is a right bracket otherwise use end
    # 
    class Block < MasterView::DirectiveBase

      metadata :priority => 'MediumHigh',
        :category => 'erb',
        :description => 'Expands to the equivalent rhtml (erb) block code around the element'

      event :before_stag do
        count_left_brackets = attr_value.scan( /\{/ ).size
        count_right_brackets = attr_value.scan( /\}/ ).size
        @end_block = (count_left_brackets > count_right_brackets) ? '}' : 'end'
        render erb_eval(attr_value)
      end

      event :after_etag do
        render erb_eval(@end_block)
      end

    end
  end
end