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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.

Usage

Quick usage

{{#invoke:list|function|first item|second item|third item|...}}

All parameters

{{#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
}}

Arguments passed from parent template

{{#invoke:list|function}}

Functions

Function name	Produces	Example output	Template using the function
bulleted	Bulleted lists	First item Second item Third item	{{bulleted list}}
unbulleted	Unbulleted lists	First item Second item Third item	{{unbulleted list}}
horizontal	Horizontal bulleted lists	First item Second item Third item	{{hlist}}
ordered	Ordered lists (numbered lists and alphabetical lists)	First item Second item Third item	{{ordered list}}
horizontal_ordered	Horizontal ordered lists	First item Second item Third item	{{horizontal ordered list}}

Parameters

• 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.

Examples

Bulleted lists

Code	Result
{{#invoke:list|bulleted|First item|Second item|Third item}}	First item Second item Third item
{{#invoke:list|bulleted|First item|Second item|Third item|item_style=color:blue;}}	First item Second item Third item
{{#invoke:list|bulleted|First item|Second item|Third item|item1_style=background-color:yellow;|item2_style=background-color:silver;}}	First item Second item Third item

Unbulleted lists

Code	Result
{{#invoke:list|unbulleted|First item|Second item|Third item}}	First item Second item Third item
{{#invoke:list|unbulleted|First item|Second item|Third item|item_style=color:blue;}}	First item Second item Third item
{{#invoke:list|unbulleted|First item|Second item|Third item|item1_style=background-color:yellow;|item2_style=background-color:silver;}}	First item Second item Third item

Horizontal lists

Code	Result
{{#invoke:list|horizontal|First item|Second item|Third item}}	First item Second item Third item
{{#invoke:list|horizontal|First item|Second item|Third item|indent=2}}	First item Second item Third item

Ordered lists

Code	Result
{{#invoke:list|ordered|First item|Second item|Third item}}	First item Second item Third item
{{#invoke:list|ordered|First item|Second item|Third item|start=3}}	First item Second item Third item
Lowercase Roman numerals: {{#invoke:list|ordered|First item|Second item|Third item|type=i}}	First item Second item Third item
Lowercase Greek alphabet: {{#invoke:list|ordered|First item|Second item|Third item|list_style_type=lower-greek}}	First item Second item Third item

Horizontal ordered lists

Code	Result
{{#invoke:list|horizontal_ordered|First item|Second item|Third item}}	First item Second item Third item
{{#invoke:list|horizontal_ordered|First item|Second item|Third item|start=3}}	First item Second item Third item
{{#invoke:list|horizontal_ordered|First item|Second item|Third item|indent=2}}	First item Second item Third item

Tracking/maintenance category

• Category:List templates with deprecated parameters (9)

See also

• Module:Separated entries

The above documentation is transcluded from Module:List/doc. (edit | history)
Editors can experiment in this module's sandbox (edit | diff) and testcases (edit | run) pages.
Subpages of this module.

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 > 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 _, 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 _, 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(
			"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, {
			frameOnly = ((frame and frame.args and frame.args.frameonly or '') ~= ''),
			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