def print_shelf(shelf, title=None):
	# Discover the dimensions of the shelves
	cols = len(shelf)
	rows, cell_height, cell_width = 0,0,0
	for col in shelf:
		rows = max(rows, len(col))
		for cell in col:
			if len(cell) > 0:
				cell_height = max(cell_height, len(cell))
				cell_width  = max(cell_width,  max([len(str(item)) for item in cell]))

	# Define format strings used to generate output
	title_width  = (cell_width+2)*cols
	title_pre    = " "*( title_width/2 )
	title_post   = " "*( title_width - title_width/2 )

	format_line  = (("+-" + "-"*(cell_width+2))*cols + "+\n")
	format_title = ("|"  + title_pre + "Hylle %s" + title_post + "|\n")
	format_cell  = "|  %s%s "
	format_endl  = "|\n"

	# Pretty-format the shelf in an ugly way
	output = []
	output.append(format_line)

	if title:
		output.append( format_title % title )
		output.append( format_line )

	for j in xrange(0, rows):
		for k in xrange(0, cell_height):
			for i in xrange(0, cols):
				try:
					content = str(shelf[i][j][k])

				except:
					content = ""
					
				spacing = " "*(cell_width-len(content))
				output.append( format_cell %(content, spacing) )

			output.append(format_endl)
	
		output.append(format_line)
	
	# Send the result to stdout
	print "".join(output)
	


def print_all_shelves():
	for shelfname in Placement.get_all_shelves():
		print_shelf(Placement.shelf_as_list(shelfname), title=shelfname)


def print_shelf_cmd(shelfname):
	if shelfname:
		print_shelf(shelfname, title=shelfname)
	else:
		print_all_shelves()