Module:List
local libUtil = require('libraryUtil')
 local checkType = libUtil.checkType
 local mTableTools = require('Module:TableTools')
 
 local p = {}
 
 local listTypes = {
 	['bulleted'] = true,
 	['unbulleted'] = true,
 	['horizontal'] = true,
 	['ordered'] = true,
 	['horizontal_ordered'] = true
 }
 
 function p.makeListData(listType, args)
 	-- Constructs a data table to be passed to p.renderList.
 	local data = {}
 
 	-- Classes and TemplateStyles
 	data.classes = {}
 	data.templatestyles = ''
 	if listType == 'horizontal' or listType == 'horizontal_ordered' then
 		table.insert(data.classes, 'hlist')
 		data.templatestyles = mw.getCurrentFrame():extensionTag{
 			name = 'templatestyles', args = { src = 'Hlist/styles.css' }
 		}
 	elseif listType == 'unbulleted' then
 		table.insert(data.classes, 'plainlist')
 		data.templatestyles = mw.getCurrentFrame():extensionTag{
 			name = 'templatestyles', args = { src = 'Plainlist/styles.css' }
 		}
 	end
 	table.insert(data.classes, args.class)
 
 	-- Main div style
 	data.style = args.style
 
 	-- Indent for horizontal lists
 	if listType == 'horizontal' or listType == 'horizontal_ordered' then
 		local indent = tonumber(args.indent)
 		indent = indent and indent * 1.6 or 0
 		if indent &gt; 0 then
 			data.marginLeft = indent .. 'em'
 		end
 	end
 	
 	-- List style types for ordered lists
 	-- This could be &quot;1, 2, 3&quot;, &quot;a, b, c&quot;, or a number of others. The list style
 	-- type is either set by the &quot;type&quot; attribute or the &quot;list-style-type&quot; CSS
 	-- property.
 	if listType == 'ordered' or listType == 'horizontal_ordered' then 
 		data.listStyleType = args.list_style_type or args['list-style-type']
 		data.type = args['type']
 
 		-- Detect invalid type attributes and attempt to convert them to
 		-- list-style-type CSS properties.
 		if data.type 
 			and not data.listStyleType
 			and not tostring(data.type):find('^%s*[1AaIi]%s*$')
 		then
 			data.listStyleType = data.type
 			data.type = nil
 		end
 	end
 	
 	-- List tag type
 	if listType == 'ordered' or listType == 'horizontal_ordered' then
 		data.listTag = 'ol'
 	else
 		data.listTag = 'ul'
 	end
 
 	-- Start number for ordered lists
 	data.start = args.start
 	if listType == 'horizontal_ordered' then
 		-- Apply fix to get start numbers working with horizontal ordered lists.
 		local startNum = tonumber(data.start)
 		if startNum then
 			data.counterReset = 'listitem ' .. tostring(startNum - 1)
 		end
 	end
 
 	-- List style
 	 -- ul_style and ol_style are included for backwards compatibility. No
 	 -- distinction is made for ordered or unordered lists.
 	data.listStyle = args.list_style
 
 	-- List items
 	-- li_style is included for backwards compatibility. item_style was included
 	-- to be easier to understand for non-coders.
 	data.itemStyle = args.item_style or args.li_style
 	data.items = {}
 	for _, num in ipairs(mTableTools.numKeys(args)) do
 		local item = {}
 		item.content = args[num]
 		item.style = args['item' .. tostring(num) .. '_style']
 			or args['item_style' .. tostring(num)]
 		item.value = args['item' .. tostring(num) .. '_value']
 			or args['item_value' .. tostring(num)]
 		table.insert(data.items, item)
 	end
 	
 	return data
 end
 
 function p.renderList(data)
 	-- Renders the list HTML.
 	
 	-- Return the blank string if there are no list items.
 	if type(data.items) ~= 'table' or #data.items &lt; 1 then
 		return ''
 	end
 	
 	-- Render the main div tag.
 	local root = mw.html.create('div')
 	for _, class in ipairs(data.classes or {}) do
 		root:addClass(class)
 	end
 	root:css{['margin-left'] = data.marginLeft}
 	if data.style then
 		root:cssText(data.style)
 	end
 
 	-- Render the list tag.
 	local list = root:tag(data.listTag or 'ul')
 	list
 		:attr{start = data.start, type = data.type}
 		:css{
 			['counter-reset'] = data.counterReset,
 			['list-style-type'] = data.listStyleType
 		}
 	if data.listStyle then
 		list:cssText(data.listStyle)
 	end
 
 	-- Render the list items
 	for _, t in ipairs(data.items or {}) do
 		local item = list:tag('li')
 		if data.itemStyle then
 			item:cssText(data.itemStyle)
 		end
 		if t.style then
 			item:cssText(t.style)
 		end
 		item
 			:attr{value = t.value}
 			:wikitext(t.content)
 	end
 
 	return data.templatestyles .. tostring(root)
 end
 
 function p.renderTrackingCategories(args)
 	local isDeprecated = false -- Tracks deprecated parameters.
 	for k, v in pairs(args) do
 		k = tostring(k)
 		if k:find('^item_style%d+$') or k:find('^item_value%d+$') then
 			isDeprecated = true
 			break
 		end
 	end
 	local ret = ''
 	if isDeprecated then
 		ret = ret .. '[[Category:List templates with deprecated parameters]]'
 	end
 	return ret
 end
 
 function p.makeList(listType, args)
 	if not listType or not listTypes[listType] then
 		error(string.format(
 			&quot;bad argument #1 to 'makeList' ('%s' is not a valid list type)&quot;,
 			tostring(listType)
 		), 2)
 	end
 	checkType('makeList', 2, args, 'table')
 	local data = p.makeListData(listType, args)
 	local list = p.renderList(data)
 	local trackingCategories = p.renderTrackingCategories(args)
 	return list .. trackingCategories
 end
 
 for listType in pairs(listTypes) do
 	p[listType] = function (frame)
 		local mArguments = require('Module:Arguments')
 		local origArgs = mArguments.getArgs(frame, {
 			valueFunc = function (key, value)
 			if not value or not mw.ustring.find(value, '%S') then return nil end
 			if mw.ustring.find(value, '^%s*[%*#;:]') then
 				return value
 			else
 				return value:match('^%s*(.-)%s*$')
 			end
 			return nil
 		end
 		})
 		-- Copy all the arguments to a new table, for faster indexing.
 		local args = {}
 		for k, v in pairs(origArgs) do
 			args[k] = v
 		end
 		return p.makeList(listType, args)
 	end
 end