# code:
# * George Moschovitis  <gm@navel.gr>
#
# (c) 2004 Navel, all rights reserved.
# $Id$

require 'glue/property'

module G

#--
# Override the default PropertyUtils implementation to
# add markup support.
#++
module PropertyUtils
	# Override to add markup code.	
	#
	def self.prop_setter(prop)
		s = prop.symbol
		if markup = prop.meta[:markup]
			# if true, set to default Markup
			markup = N::Markup if true == markup

			return %{
				def #{s}=(val)
					@#{s} = #{markup}.expand(val)
				end

				def compact_#{s}
					#{markup}.compact(@#{s})
				end
			}
		else
			return %{
				def #{s}=(val)
					@#{s} = val
				end
			}
		end
	end
end

end # module

module N
	
# = Markup
#
# Generalised Markup transformations.
#
# The expand methods evaluate (expand) the markup
# code to produce the final content. The compact
# methods reverse this process to create the original
# markup code. Not all markup transformations are
# reversible.
#
# When this library is included, the default PropertyUtils 
# implementation is overriden to add markup support.
#
# === Examples
#
# here comes the #{obj.body} # => prints the expanded version.
#
#	obj.body = N::Markup.expand(@params['body'])	
#
module Markup
	def self.expand_html!(str)
		return unless str
		str.gsub!(/"/, '&quot;')		
		str.gsub!(/'/, '&#39;')		
		str.gsub!(/\r\n/, ' <br />')
		return str
	end

	def self.compact_html!(str)
		return unless str
		str.gsub!(/&quot;/, '"')		
		str.gsub!(/&#39;/, "'")
		# gmosx: SOS! double quotes ARE needed for \r\n!!
		str.gsub!(/\s<br \/>/, "\r\n")
		return str
	end

	# Expand the markup code to produce the
	# actual content.
	#
	def self.expand(str)
		if str
			xstr = str.dup
			expand_html!(xstr)
			expand_wiki!(xstr)
			return xstr
		else
			return str
		end
	end

	# Compact (reverse) the content to the origial markup
	# code. Not all markup transformations are reversible.
	#
	def self.compact(str)
		if str
			xstr = str.dup
			compact_html!(xstr)
			compact_wiki!(xstr)
			return xstr
		else
			return str
		end
	end

	# Remove markup code from the input string.
	# NOT IMPLEMENTED.
	#
	def self.clear(str)
	end
	
end

end # module