This module is rated as beta, and is ready for widespread use. It is still new and should be used with some caution to ensure the results are as expected.
This module is subject to page protection. It is a highly visible module in use by a very large number of pages, or is substituted very frequently. Because vandalism or mistakes would affect many pages, and even trivial editing might cause substantial load on the servers, it is protected from editing.
This module outputs various kinds of lists. At present, it supports bulleted lists, unbulleted lists, horizontal lists, ordered lists (numbered or alphabetical), and horizontal ordered lists. It allows for easy css styling of the list or of the individual list items.
{{#invoke:list|function
|first item|second item|third item|...
|start = start number for ordered lists
|type = type of numbering for ordered lists
|list_style_type = type of marker for ordered lists (uses CSS)
|class = class
|style = style
|list_style = style for the list
|item_style = style for all list items
|item1_style = style for the first list item |item2_style = style for the second list item |...
|item1_value = value for the first list item |item2_value = value for the second list item |...
|indent = indent for horizontal lists
}}
Positional parameters (1, 2, 3...) - these are the list items. If no list items are present, the module will output nothing.
start - sets the start item for ordered lists. This can be a start number for numbered lists, or a start letter for alphabetical lists. Horizontal ordered lists only support numbers.
type - the type of marker used in ordered lists. Possible values are "1" for numbers (the default), "A" for uppercase letters, "a" for lowercase letters, "I" for uppercase Roman numerals, and "i" for lowercase Roman numerals. Not supported in horizontal ordered lists. See also the list_style_type parameter.
list_style_type - the type of marker used in ordered lists. This uses CSS styling, and has more types available than the type parameter, which uses an html attribute. Possible values are listed at MDN's list-style-type page. Support may vary by browser. list-style-type is an alias for this parameter.
class - a custom class for the <div>...</div> tags surrounding the list, e.g. plainlinks.
style - a custom css style for the <div>...</div> tags surrounding the list, e.g. font-size: 90%;.
list_style - a custom css style for the list itself. The format is the same as for the |style= parameter.
item_style - a custom css style for all of the list items (the <li>...</li> tags). The format is the same as for the |style= parameter.
item1_style, item2_style, item3_style... - custom css styles for each of the list items. The format is the same as for the |style= parameter.
item1_value, item2_value, item3_value... - custom value for the given list item. List items following the one given will increment from the specified value. The value should be a positive integer. (Note that this option only has an effect on ordered lists.)
indent - this parameter indents the list, for horizontal and horizontal ordered lists only. The value must be a number, e.g. 2. The indent is calculated in em, and is 1.6 times the value specified. If no indent is specified, the default is zero.
-- This module outputs different kinds of lists. At the moment, bulleted, unbulleted,
-- horizontal, ordered, and horizontal ordered 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(
'<li style="%s%s">%s</li>',
style, itemStyle, data
)
else
return mw.ustring.format(
'<li>%s</li>',
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, args)
local classes = {}
if listType == 'horizontal' or listType == 'horizontal_ordered' then
table.insert(classes, 'hlist')
elseif listType == 'unbulleted' then
table.insert(classes, 'plainlist')
end
table.insert(classes, args.class)
local ret
if #classes == 0 then
return nil
end
return mw.ustring.format(' class="%s"', table.concat(classes, ' '))
end
local function getStyle(listType, args)
local styles = {}
if listType == 'horizontal' or listType == 'horizontal_ordered' then
local indent = args.indent and tonumber(indent)
indent = tostring((indent and indent * 1.6) or 0)
table.insert(styles, 'margin-left: ' .. indent .. 'em;')
end
local listStyleType = args['list-style-type']
if listStyleType then
table.insert(styles, 'list-style-type: ' .. listStyleType .. ';')
end
table.insert(styles, args.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 == 'ordered' or listType == 'horizontal_ordered' 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) or ''
local style = getStyle(listType, args) or ''
local list_style = args.list_style or args.ul_style or args.ol_style -- ul_style and ol_style are included for backwards compatibility. No distinction is made for ordered or unordered lists.
list_style = list_style and (' style="' .. list_style .. '"') or ''
return mw.ustring.format(
'<div%s%s><%s%s%s%s>%s</%s></div>',
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', 'ordered', 'horizontal_ordered'}
for _, funcName in ipairs(funcNames) do
p[funcName] = makeWrapper(funcName)
end
return p
