Module:Vertical header/sandbox

This is the module sandbox page for Module:Vertical header (diff).
local p = {}

local function escapeQuotes(text)
	if not text then
		return nil
	end
	return text:gsub('"', "&quot;")
end

local function getRowCount(text)
	if not text then
		return 0
	end
	local _, count = text:gsub("<[bB][rR] */? *>", "%0")
	return count + 1
end

local function getAttributeData(options)
	local cellClasses = {"vertical-header", "nowrap"}
	local cellStyles = {}
	local divClasses = {}
	local divStyles = {}

	if options.sortPadding then
		table.insert(cellClasses, "vertical-header-sortable")
	else
		table.insert(cellClasses, "unsortable")
	end
	
	if options.vertAlign == "top" then
		table.insert(cellClasses, "vertical-header-align-top")
	elseif options.vertAlign == "middle" then
		table.insert(cellClasses, "vertical-header-align-middle")
	end

	if options.manualWidth then
		table.insert(cellStyles, "width:" .. options.manualWidth)
	else
		local rowCount = getRowCount(options.text)
		-- The styles for 1 row are in the default vertical-header class. For
		-- 2, 3, or 4 rows, we add special classes to get the correct width.
		-- In the rare event that there are more than 4 rows, use inline styles.
		if rowCount >= 2 and rowCount <= 4 then
			table.insert(cellClasses, string.format("vertical-header-%drows", rowCount))
		elseif rowCount > 4 then
			table.insert(cellStyles, string.format("width:%.3fem", rowCount * 0.875))
		end
	end
	
	if options.noBold then
		table.insert(divClasses, "vertical-header-nobold")
	end
	
	table.insert(cellStyles, options.extraCellStyles)
	table.insert(divStyles, options.extraDivStyles)

	return cellClasses, cellStyles, divClasses, divStyles
end

local function formatAttribute(options)
	if #options.attrs == 0 then
		return nil
	end
	local separator = options.separator or ""
	return string.format(
		'%s="%s"',
		options.attrName,
		table.concat(options.attrs, separator)
	)
end

local function formatOutput(text, cellClasses, cellStyles, divClasses, divStyles)
	cellAttributes = {}
	table.insert(cellAttributes, formatAttribute{attrName = "class", attrs = cellClasses, separator = " "})
	table.insert(cellAttributes, formatAttribute{attrName = "style", attrs = cellStyles})
	
	local div = mw.html.create("div")
	for _, class in ipairs(divClasses) do
		div:addClass(class)
	end
	for _, cssText in ipairs(divStyles) do
		div:cssText(cssText)
	end
	div:wikitext(text)

	return string.format(
		"%s | %s",
		table.concat(cellAttributes, " "),
		tostring(div)
	)
end

function p._cell(args)
	local text = args[1]
	local cellClasses, cellStyles, divClasses, divStyles = getAttributeData{
		text = text,
		sortPadding = args.stp,
		vertAlign = args.va,
		manualWidth = args.mw,
		noBold = args.nb,
		extraCellStyles = escapeQuotes(args.cellstyle),
		extraDivStyles = escapeQuotes(args.style)
	}
	return formatOutput(text, cellClasses, cellStyles, divClasses, divStyles)
end

function p.cell(frame)
	local args = require("Module:Arguments").getArgs(frame, {
		wrapper="Template:Vertical header"
	})
	return p._cell(args)
end

return p