Module:List

-- This module outputs different kinds of lists. At the moment, bulleted, unbulleted, horizontal, and numbered lists are supported.

local p = {}

local function getListItem(data, style, itemStyle) if not data then return nil end if style or itemStyle then style = style or '' itemStyle = itemStyle or '' return mw.ustring.format(			'%s',			style, itemStyle, data		) else return mw.ustring.format(			'%s',			data		) end end

local function getArgNums(args) -- Returns an array containing the keys of all positional arguments -- that contain data (i.e. non-whitespace values). local nums = {} for k, v in pairs(args) do		if type(k) == 'number' and k >= 1 and math.floor(k) == k and mw.ustring.match(v, '%S') then table.insert(nums, k)		end end table.sort(nums) return nums end

local function getClass(listType, class) local classes = {} if listType == 'horizontal' then table.insert(classes, 'hlist') elseif listType == 'unbulleted' then table.insert(classes, 'plainlist') end table.insert(classes, class) local ret if #classes == 0 then return nil end return mw.ustring.format(' class="%s"', table.concat(classes, ' ')) end

local function getStyle(listType, indent, style) local styles = {} if listType == 'horizontal' then indent = indent and tonumber(indent) indent = tostring((indent and indent * 1.6) or 0) table.insert(styles, 'margin-left: ' .. indent .. 'em;') end table.insert(styles, style) if #styles == 0 then return nil end return mw.ustring.format(' style="%s"', table.concat(styles, ' ')) end

function p.makeList(listType, args) -- This is the main function to be called from other Lua modules. -- First, get the list items. local listItems = {} local argNums = getArgNums(args) for i, num in ipairs(argNums) do		local item = getListItem(			args[num],			args.item_style or args.li_style, -- li_style is included for backwards compatibility. item_style was included to be easier to understand for non-coders.			args['item_style' .. tostring(num)] or args['li_style' .. tostring(num)]		) table.insert(listItems, item) end if #listItems == 0 then return '' end -- Check if we need a ul tag or an ol tag, and get the start and type attributes for ordered lists. local listTag = 'ul' local startAttr, typeAttr if listType == 'numbered' then listTag = 'ol' startAttr = args.start if startAttr then startAttr = ' start="' .. startAttr .. '"' end typeAttr = args.type if typeAttr then typeAttr = ' type="' .. typeAttr .. '"' end end startAttr = startAttr or '' typeAttr = typeAttr or '' -- Get the classes and styles and output the list. local class = getClass(listType, args.class) or '' local style = getStyle(listType, args.indent, args.style) or '' local list_style = args.list_style or args.ul_style -- ul_style is included for backwards compatibility, and will work even with ordered lists. list_style = list_style and (' style="' .. list_style .. '"') or '' return mw.ustring.format(		'<%s%s%s%s>%s ',		class, style, listTag, startAttr, typeAttr, list_style, table.concat(listItems), listTag	) end

local function makeWrapper(listType) return function(frame) local origArgs if frame == mw.getCurrentFrame then origArgs = frame:getParent.args for k, v in pairs(frame.args) do				origArgs = frame.args break end else origArgs = frame end local args = {} for k, v in pairs(origArgs) do			if type(k) == 'number' or v ~= '' then args[k] = v			end end return p.makeList(listType, args) end end

local funcNames = {'bulleted', 'unbulleted', 'horizontal', 'numbered'}

for _, funcName in ipairs(funcNames) do	p[funcName] = makeWrapper(funcName) end

return p