Module:Media table section

-- This module implements {{Media table section}}.

local MediaTable = {}
local HTMLcolor = mw.loadData( 'Module:Color contrast/colors' )
local contrast_ratio = require('Module:Color contrast')._ratio

function MediaTable.part(args)
	local row = mw.html.create('tr')
	
	if (args.c == 'header-blue' or args.c == nil or args.c == '') then args.c = '#CCCCFF' end
	if (args.c == 'header-grey' or args.c == 'header-gray') then args.c = '#EAECF0' end
	
	-- Add # to color if necessary
	if args.c ~= nil and HTMLcolor[args.c] == nil then
		args.c = '#'..(mw.ustring.match(args.c, '^[%s#]*([a-fA-F0-9]*)[%s]*$') or '')
	end
	
	local black_cr = contrast_ratio{args.c or '#CCCCFF', 'black', ['error'] = 0}
	local white_cr = contrast_ratio{'white', args.c or '#CCCCFF', ['error'] = 0}
	
	local partTypes = {
		{'act','Act'},
		{'chapter','Chapter'},
		{'part','Part'},
		{'volume','Volume'},
		{'week','Week'},
	}
	
	local displaytext = ''
	local isAnyPartSet = false
	
	for k,v in pairs(partTypes) do
		if args[v[1]] then
			isAnyPartSet = true
			displaytext = v[2] .. ' ' .. args[v[1]]
		end
	end
	if args.subtitle then
		displaytext = displaytext .. ((isAnyPartSet and ': ' or '') .. args.subtitle)
	end

	local plainText = require('Module:Plain text')._main
	local displayTextAnchor = plainText(displaytext)
	
	row:tag('td')
		:attr('colspan', 13)
		:attr('id', args.id or displayTextAnchor)
		:css('text-align', 'center')
		:css('background-color', args.c or '#CCCCFF')
		:css('color', black_cr > white_cr and 'black' or 'white')
		:wikitext((args.nobold and displaytext or "'''" .. displaytext .. "'''") .. (args.r and "&#8202;" .. MediaTable.reference(args.r, args.c) or ''))
	
	return tostring(row)
end

function MediaTable.reference(reference, background)
	local link1_cr = contrast_ratio{'#0645AD', background or '#CCCCFF', ['error'] = 0}
	local link2_cr = contrast_ratio{'#0B0080', background or '#CCCCFF', ['error'] = 0}
	
	local refspan = mw.html.create('span')
		:wikitext(reference)
	
	if link1_cr < 7 or link2_cr < 7 then
		refspan
			:css('color','black')
			:css('background-color','white')
			:css('padding','1px')
			:css('display','inline-block')
			:css('line-height','50%')
	end
	
	return tostring(refspan)
end

--------------------------------------------------------------------------------
-- Exports
--------------------------------------------------------------------------------

local p = {}

function p.part(frame)
	local args = require('Module:Arguments').getArgs(frame, {
		removeBlanks = false,
		wrappers = 'Template:Media table section'
	})
	return MediaTable.part(args)
end

return p
Usage
