-- This module outputs different kinds of lists. At the moment, bulleted, -- unbulleted, horizontal, ordered, and horizontal ordered lists are supported.  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  data.classes = {}  if listType == 'horizontal' or listType == 'horizontal_ordered' then  table.insert(data.classes, 'hlist hlist-separated')  elseif listType == 'unbulleted' then  table.insert(data.classes, 'plainlist')  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 > 0 then  data.marginLeft = indent .. 'em'  end  end   -- List style types for ordered lists  -- This could be "1, 2, 3", "a, b, c", or a number of others. The list style  -- type is either set by the "type" attribute or the "list-style-type" 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 i, 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 < 1 then  return ''  end   -- Render the main div tag.  local root = mw.html.create('div')  for i, 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 i, 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 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+$') then  isDeprecated = true  break  end  end  local ret = ''  if isDeprecated then  ret = ret .. '[[Category:List templates with deprecated parameters]]'  end  return ret end  function p.makeList(listType, args)  if not listType or not listTypes[listType] then  error(string.format(  "bad argument #1 to 'makeList' ('%s' is not a valid list type)",  tostring(listType)  ), 2)  end  checkType('makeList', 2, args, 'table')  local data = p.makeListData(listType, args)  local list = p.renderList(data)  local trackingCategories = p.renderTrackingCategories(args)  return list .. trackingCategories end  for listType in pairs(listTypes) do  p[listType] = function (frame)  local mArguments = require('Module:Arguments')  local origArgs = mArguments.getArgs(frame, {  valueFunc = function (key, value)  if not value or not mw.ustring.find(value, '%S') then return nil end  if mw.ustring.find(value, '^%s*[%*#;:]') then  return value  else  return value:match('^%s*(.-)%s*$')  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  return p