OpenDiv = /^[ ]{0,3}\+\-\-+\s*([^\s-]*)\s*\-*\s*$/
CloseDiv = /^[ ]{0,3}\=\-\-+\s*([^\s-]*)\s*\-*\s*$/
StartPipe = /^[ ]{0,3}\|(.*)$/ # $1 is rest of line
DecorativeClosing = OpenDiv

MaRuKu::In::Markdown::register_block_extension(
	:regexp  => OpenDiv,
	:handler => lambda { |doc, src, context|
		# return false if not doc.is_math_enabled?
		first = src.shift_line
		first =~ OpenDiv
		ial_at_beginning = $1
		ial_at_end = nil
		
		lines = []
		# if second line starts with "|"
		if src.cur_line =~ StartPipe
			# then we read until no more "|"
			while src.cur_line && (src.cur_line =~ StartPipe)
				content = $1
				lines.push content
				src.shift_line
			end
			if src.cur_line =~ DecorativeClosing
				ial_at_end = $1
				src.shift_line 
			end
		else
			# else we read until CloseDiv
			divs_open = 1
			while src.cur_line && (divs_open>0)
				if src.cur_line =~ CloseDiv
					divs_open -= 1
					if divs_open == 0
						ial_at_end = $1
						src.shift_line
						break
					else
						lines.push src.shift_line
					end
				else
					if src.cur_line =~ OpenDiv
						divs_open += 1 
					end
					lines.push src.shift_line
				end
			end
			
			if divs_open > 0
				e = "At end of input, I still have #{divs_open} DIVs open."
				doc.maruku_error(e, src, context)
				return true
			end
		end
		
		ial_at_beginning = nil unless 
			(ial_at_beginning&&ial_at_beginning.size > 0)
		ial_at_end = nil unless (ial_at_end && ial_at_end.size > 0)

		if ial_at_beginning && ial_at_end
			e = "Found two conflicting IALs: #{ial_at_beginning.inspect} and #{ial_at_end.inspect}"
			doc.maruku_error(e, src, context)
		end
		
		al_string = ial_at_beginning || ial_at_end
		al = nil
		
		if al_string =~ /^\{(.*)\}$/
			inside = $1
		cs = MaRuKu::In::Markdown::SpanLevelParser::CharSource
		al = al_string &&
			doc.read_attribute_list(cs.new(inside), its_context=nil, break_on=[nil])
		end
		
		src = MaRuKu::In::Markdown::BlockLevelParser::LineSource.new(lines)
		children = doc.parse_blocks(src)

		context.push doc.md_div(children, al)
		true
	})
	

module MaRuKu; class MDElement

	def md_div(children, a=nil)
		self.md_el(:div, children, meta={}, a)
	end
	
end end


module MaRuKu; module Out; module HTML

	def to_html_div
		add_ws  wrap_as_element('div')
	end
	
end end end