Module:Navbox

Warning
This Lua module is used on approximately 4,420,000 pages, or roughly 796396% of all pages.
To avoid major disruption and server load, any changes should be tested in the module's /sandbox or /testcases subpages, or in your own module sandbox. The tested changes can be added to this page in a single edit. Consider discussing changes on the talk page before implementing them.
Protected
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.
Lua error in Module:Lua_banner at line 112: attempt to index field 'edit' (a nil value). Lua error in Module:TNT at line 159: Missing JsonConfig extension; Cannot load https://commons.wikimedia.org/wiki/Data:I18n/Uses TemplateStyles.tab.
This module implements the {{Navbox}} template. Please see the template page for usage instructions.
Tracking/maintenance categories

require('strict')
local p = {}
local navbar = require('Module:Navbar')._navbar
local cfg = mw.loadData('Module:Navbox/configuration')
local getArgs -- lazily initialized
local args
local format = string.format

local function striped(wikitext, border)
	-- Return wikitext with markers replaced for odd/even striping.
	-- Child (subgroup) navboxes are flagged with a category that is removed
	-- by parent navboxes. The result is that the category shows all pages
	-- where a child navbox is not contained in a parent navbox.
	local orphanCat = cfg.category.orphan
	if border == cfg.keyword.border_subgroup and args[cfg.arg.orphan] ~= cfg.keyword.orphan_yes then
		-- No change; striping occurs in outermost navbox.
		return wikitext .. orphanCat
	end
	local first, second = cfg.class.navbox_odd_part, cfg.class.navbox_even_part
	if args[cfg.arg.evenodd] then
		if args[cfg.arg.evenodd] == cfg.keyword.evenodd_swap then
			first, second = second, first
		else
			first = args[cfg.arg.evenodd]
			second = first
		end
	end
	local changer
	if first == second then
		changer = first
	else
		local index = 0
		changer = function (code)
			if code == '0' then
				-- Current occurrence is for a group before a nested table.
				-- Set it to first as a valid although pointless class.
				-- The next occurrence will be the first row after a title
				-- in a subgroup and will also be first.
				index = 0
				return first
			end
			index = index + 1
			return index % 2 == 1 and first or second
		end
	end
	local regex = orphanCat:gsub('([%[%]])', '%%%1')
	return (wikitext:gsub(regex, ''):gsub(cfg.marker.regex, changer)) -- () omits gsub count
end

local function processItem(item, nowrapitems)
	if item:sub(1, 2) == '{|' then
		-- Applying nowrap to lines in a table does not make sense.
		-- Add newlines to compensate for trim of x in |parm=x in a template.
		return '\n' .. item ..'\n'
	end
	if nowrapitems == cfg.keyword.nowrapitems_yes then
		local lines = {}
		for line in (item .. '\n'):gmatch('([^\n]*)\n') do
			local prefix, content = line:match('^([*:;#]+)%s*(.*)')
			if prefix and not content:match(cfg.pattern.nowrap) then
				line = format(cfg.nowrap_item, prefix, content)
			end
			table.insert(lines, line)
		end
		item = table.concat(lines, '\n')
	end
	if item:match('^[*:;#]') then
		return '\n' .. item ..'\n'
	end
	return item
end

local function has_navbar()
	return args[cfg.arg.navbar] ~= cfg.keyword.navbar_off
		and args[cfg.arg.navbar] ~= cfg.keyword.navbar_plain
		and (
			args[cfg.arg.name]
			or mw.getCurrentFrame():getParent():getTitle():gsub(cfg.pattern.sandbox, '')
				~= cfg.pattern.navbox
		)
end

local function renderNavBar(titleCell)
	if has_navbar() then
		titleCell:wikitext(navbar{
			[cfg.navbar.name] = args[cfg.arg.name],
			[cfg.navbar.mini] = 1,
			[cfg.navbar.fontstyle] = (args[cfg.arg.basestyle] or '') .. ';' ..
				(args[cfg.arg.titlestyle] or '') ..
				';background:none transparent;border:none;box-shadow:none;padding:0;'
		})
	end

end

local function renderTitleRow(tbl)
	if not args[cfg.arg.title] then return end

	local titleRow = tbl:tag('tr')

	local titleCell = titleRow:tag('th'):attr('scope', 'col')

	local titleColspan = 2
	if args[cfg.arg.imageleft] then titleColspan = titleColspan + 1 end
	if args[cfg.arg.image] then titleColspan = titleColspan + 1 end

	titleCell
		:cssText(args[cfg.arg.basestyle])
		:cssText(args[cfg.arg.titlestyle])
		:addClass(cfg.class.navbox_title)
		:attr('colspan', titleColspan)

	renderNavBar(titleCell)

	titleCell
		:tag('div')
			-- id for aria-labelledby attribute
			:attr('id', mw.uri.anchorEncode(args[cfg.arg.title]))
			:addClass(args[cfg.arg.titleclass])
			:css('font-size', '114%')
			:css('margin', '0 4em')
			:wikitext(processItem(args[cfg.arg.title]))
end

local function getAboveBelowColspan()
	local ret = 2
	if args[cfg.arg.imageleft] then ret = ret + 1 end
	if args[cfg.arg.image] then ret = ret + 1 end
	return ret
end

local function renderAboveRow(tbl)
	if not args[cfg.arg.above] then return end

	tbl:tag('tr')
		:tag('td')
			:addClass(cfg.class.navbox_abovebelow)
			:addClass(args[cfg.arg.aboveclass])
			:cssText(args[cfg.arg.basestyle])
			:cssText(args[cfg.arg.abovestyle])
			:attr('colspan', getAboveBelowColspan())
			:tag('div')
				-- id for aria-labelledby attribute, if no title
				:attr('id', (not args[cfg.arg.title]) and mw.uri.anchorEncode(args[cfg.arg.above]) or nil)
				:wikitext(processItem(args[cfg.arg.above], args[cfg.arg.nowrapitems]))
end

local function renderBelowRow(tbl)
	if not args[cfg.arg.below] then return end

	tbl:tag('tr')
		:tag('td')
			:addClass(cfg.class.navbox_abovebelow)
			:addClass(args[cfg.arg.belowclass])
			:cssText(args[cfg.arg.basestyle])
			:cssText(args[cfg.arg.belowstyle])
			:attr('colspan', getAboveBelowColspan())
			:tag('div')
				:wikitext(processItem(args[cfg.arg.below], args[cfg.arg.nowrapitems]))
end

local function renderListRow(tbl, index, listnum, listnums_size)
	local row = tbl:tag('tr')

	if index == 1 and args[cfg.arg.imageleft] then
		row
			:tag('td')
				:addClass(cfg.class.noviewer)
				:addClass(cfg.class.navbox_image)
				:addClass(args[cfg.arg.imageclass])
				:css('width', '1px')               -- Minimize width
				:css('padding', '0 2px 0 0')
				:cssText(args[cfg.arg.imageleftstyle])
				:attr('rowspan', listnums_size)
				:tag('div')
					:wikitext(processItem(args[cfg.arg.imageleft]))
	end

	local group_and_num = format(cfg.arg.group_and_num, listnum)
	local groupstyle_and_num = format(cfg.arg.groupstyle_and_num, listnum)
	if args[group_and_num] then
		local groupCell = row:tag('th')

		-- id for aria-labelledby attribute, if lone group with no title or above
		if listnum == 1 and not (args[cfg.arg.title] or args[cfg.arg.above] or args[cfg.arg.group2]) then
			groupCell
				:attr('id', mw.uri.anchorEncode(args[cfg.arg.group1]))
		end

		groupCell
			:attr('scope', 'row')
			:addClass(cfg.class.navbox_group)
			:addClass(args[cfg.arg.groupclass])
			:cssText(args[cfg.arg.basestyle])
			-- If groupwidth not specified, minimize width
			:css('width', args[cfg.arg.groupwidth] or '1%')

		groupCell
			:cssText(args[cfg.arg.groupstyle])
			:cssText(args[groupstyle_and_num])
			:wikitext(args[group_and_num])
	end

	local listCell = row:tag('td')

	if args[group_and_num] then
		listCell
			:addClass(cfg.class.navbox_list_with_group)
	else
		listCell:attr('colspan', 2)
	end

	if not args[cfg.arg.groupwidth] then
		listCell:css('width', '100%')
	end

	local rowstyle  -- usually nil so cssText(rowstyle) usually adds nothing
	if index % 2 == 1 then
		rowstyle = args[cfg.arg.oddstyle]
	else
		rowstyle = args[cfg.arg.evenstyle]
	end

	local list_and_num = format(cfg.arg.list_and_num, listnum)
	local listText = args[list_and_num]
	local oddEven = cfg.marker.oddeven
	if listText:sub(1, 12) == '</div><table' then
		-- Assume list text is for a subgroup navbox so no automatic striping for this row.
		oddEven = listText:find(cfg.pattern.navbox_title) and cfg.marker.restart or cfg.class.navbox_odd_part
	end

	local liststyle_and_num = format(cfg.arg.liststyle_and_num, listnum)
	local listclass_and_num = format(cfg.arg.listclass_and_num, listnum)
	listCell
		:css('padding', '0')
		:cssText(args[cfg.arg.liststyle])
		:cssText(rowstyle)
		:cssText(args[liststyle_and_num])
		:addClass(cfg.class.navbox_list)
		:addClass(cfg.class.navbox_part .. oddEven)
		:addClass(args[cfg.arg.listclass])
		:addClass(args[listclass_and_num])
		:tag('div')
			:css('padding',
				(index == 1 and args[cfg.arg.list1padding]) or args[cfg.arg.listpadding] or '0 0.25em'
			)
			:wikitext(processItem(listText, args[cfg.arg.nowrapitems]))

	if index == 1 and args[cfg.arg.image] then
		row
			:tag('td')
				:addClass(cfg.class.noviewer)
				:addClass(cfg.class.navbox_image)
				:addClass(args[cfg.arg.imageclass])
				:css('width', '1px')               -- Minimize width
				:css('padding', '0 0 0 2px')
				:cssText(args[cfg.arg.imagestyle])
				:attr('rowspan', listnums_size)
				:tag('div')
					:wikitext(processItem(args[cfg.arg.image]))
	end
end

local function has_list_class(htmlclass)
	local patterns = {
		'^' .. htmlclass .. '$',
		'%s' .. htmlclass .. '$',
		'^' .. htmlclass .. '%s',
		'%s' .. htmlclass .. '%s'
	}
	
	for arg, _ in pairs(args) do
		if type(arg) == 'string' and mw.ustring.find(arg, cfg.pattern.class) then
			for _, pattern in ipairs(patterns) do
				if mw.ustring.find(args[arg] or '', pattern) then
					return true
				end
			end
		end
	end
	return false
end

-- there are a lot of list classes in the wild, so we add their TemplateStyles
local function add_list_styles()
	local frame = mw.getCurrentFrame()
	local function add_list_templatestyles(htmlclass, templatestyles)
		if has_list_class(htmlclass) then
			return frame:extensionTag{
				name = 'templatestyles', args = { src = templatestyles }
			}
		else
			return ''
		end
	end
	
	local hlist_styles = add_list_templatestyles('hlist', cfg.hlist_templatestyles)
	local plainlist_styles = add_list_templatestyles('plainlist', cfg.plainlist_templatestyles)
	
	-- a second workaround for [[phab:T303378]]
	-- when that issue is fixed, we can actually use has_navbar not to emit the
	-- tag here if we want
	if has_navbar() and hlist_styles == '' then
		hlist_styles = frame:extensionTag{
			name = 'templatestyles', args = { src = cfg.hlist_templatestyles }
		}
	end
	
	-- hlist -> plainlist is best-effort to preserve old Common.css ordering.
	-- this ordering is not a guarantee because most navboxes will emit only
	-- one of these classes [hlist_note]
	return hlist_styles .. plainlist_styles
end

local function needsHorizontalLists(border)
	if border == cfg.keyword.border_subgroup or args[cfg.arg.tracking] == cfg.keyword.tracking_no then
		return false
	end
	return not has_list_class(cfg.pattern.hlist) and not has_list_class(cfg.pattern.plainlist)
end

local function hasBackgroundColors()
	for _, key in ipairs({cfg.arg.titlestyle, cfg.arg.groupstyle,
		cfg.arg.basestyle, cfg.arg.abovestyle, cfg.arg.belowstyle}) do
		if tostring(args[key]):find('background', 1, true) then
			return true
		end
	end
	return false
end

local function hasBorders()
	for _, key in ipairs({cfg.arg.groupstyle, cfg.arg.basestyle,
		cfg.arg.abovestyle, cfg.arg.belowstyle}) do
		if tostring(args[key]):find('border', 1, true) then
			return true
		end
	end
	return false
end

local function isIllegible()
	local styleratio = require('Module:Color contrast')._styleratio
	for key, style in pairs(args) do
		if tostring(key):match(cfg.pattern.style) then
			if styleratio{mw.text.unstripNoWiki(style)} < 4.5 then
				return true
			end
		end
	end
	return false
end

local function getTrackingCategories(border)
	local cats = {}
	if needsHorizontalLists(border) then table.insert(cats, cfg.category.horizontal_lists) end
	if hasBackgroundColors() then table.insert(cats, cfg.category.background_colors) end
	if isIllegible() then table.insert(cats, cfg.category.illegible) end
	if hasBorders() then table.insert(cats, cfg.category.borders) end
	return cats
end

local function renderTrackingCategories(builder, border)
	local title = mw.title.getCurrentTitle()
	if title.namespace ~= 10 then return end -- not in template space
	local subpage = title.subpageText
	if subpage == cfg.keyword.subpage_doc or subpage == cfg.keyword.subpage_sandbox
		or subpage == cfg.keyword.subpage_testcases then return end

	for _, cat in ipairs(getTrackingCategories(border)) do
		builder:wikitext('[[Category:' .. cat .. ']]')
	end
end

local function renderMainTable(border, listnums)
	local tbl = mw.html.create('table')
		:addClass(cfg.class.nowraplinks)
		:addClass(args[cfg.arg.bodyclass])

	local state = args[cfg.arg.state]
	if args[cfg.arg.title] and state ~= cfg.keyword.state_plain and state ~= cfg.keyword.state_off then
		if state == cfg.keyword.state_collapsed then
			state = cfg.class.collapsed
		end
		tbl
			:addClass(cfg.class.collapsible)
			:addClass(state or cfg.class.autocollapse)
	end

	tbl:css('border-spacing', 0)
	if border == cfg.keyword.border_subgroup or border == cfg.keyword.border_none then
		tbl
			:addClass(cfg.class.navbox_subgroup)
			:cssText(args[cfg.arg.bodystyle])
			:cssText(args[cfg.arg.style])
	else  -- regular navbox - bodystyle and style will be applied to the wrapper table
		tbl
			:addClass(cfg.class.navbox_inner)
			:css('background', 'transparent')
			:css('color', 'inherit')
	end
	tbl:cssText(args[cfg.arg.innerstyle])

	renderTitleRow(tbl)
	renderAboveRow(tbl)
	local listnums_size = #listnums
	for i, listnum in ipairs(listnums) do
		renderListRow(tbl, i, listnum, listnums_size)
	end
	renderBelowRow(tbl)

	return tbl
end

local function add_navbox_styles(hiding_templatestyles)
	local frame = mw.getCurrentFrame()
	-- This is a lambda so that it doesn't need the frame as a parameter
	local function add_user_styles(templatestyles)
		if templatestyles and templatestyles ~= '' then
			return frame:extensionTag{
				name = 'templatestyles', args = { src = templatestyles }
			}
		end
		return ''
	end

	-- get templatestyles. load base from config so that Lua only needs to do
	-- the work once of parser tag expansion
	local base_templatestyles = cfg.templatestyles
	local templatestyles = add_user_styles(args[cfg.arg.templatestyles])
	local child_templatestyles = add_user_styles(args[cfg.arg.child_templatestyles])

	-- The 'navbox-styles' div exists to wrap the styles to work around T200206
	-- more elegantly. Instead of combinatorial rules, this ends up being linear
	-- number of CSS rules.
	return mw.html.create('div')
		:addClass(cfg.class.navbox_styles)
		:wikitext(
			add_list_styles() .. -- see [hlist_note] applied to 'before base_templatestyles'
			base_templatestyles ..
			templatestyles ..
			child_templatestyles ..
			table.concat(hiding_templatestyles)
		)
		:done()
end

-- work around [[phab:T303378]]
-- for each arg: find all the templatestyles strip markers, insert them into a
-- table. then remove all templatestyles markers from the arg
local function move_hiding_templatestyles(args)
	local gfind = string.gfind
	local gsub = string.gsub
	local templatestyles_markers = {}
	local strip_marker_pattern = '(\127[^\127]*UNIQ%-%-templatestyles%-%x+%-QINU[^\127]*\127)'
	for k, arg in pairs(args) do
		for marker in gfind(arg, strip_marker_pattern) do
			table.insert(templatestyles_markers, marker)
		end
		args[k] = gsub(arg, strip_marker_pattern, '')
	end
	return templatestyles_markers
end

function p._navbox(navboxArgs)
	args = navboxArgs
	local hiding_templatestyles = move_hiding_templatestyles(args)
	local listnums = {}

	for k, _ in pairs(args) do
		if type(k) == 'string' then
			local listnum = k:match(cfg.pattern.listnum)
			if listnum then table.insert(listnums, tonumber(listnum)) end
		end
	end
	table.sort(listnums)

	local border = mw.text.trim(args[cfg.arg.border] or args[1] or '')
	if border == cfg.keyword.border_child then
		border = cfg.keyword.border_subgroup
	end

	-- render the main body of the navbox
	local tbl = renderMainTable(border, listnums)

	local res = mw.html.create()
	-- render the appropriate wrapper for the navbox, based on the border param

	if border == cfg.keyword.border_none then
		res:node(add_navbox_styles(hiding_templatestyles))
		local nav = res:tag('div')
			:attr('role', 'navigation')
			:node(tbl)
		-- aria-labelledby title, otherwise above, otherwise lone group
		if args[cfg.arg.title] or args[cfg.arg.above] or (args[cfg.arg.group1]
			and not args[cfg.arg.group2]) then
			nav:attr(
				'aria-labelledby',
				mw.uri.anchorEncode(
					args[cfg.arg.title] or args[cfg.arg.above] or args[cfg.arg.group1]
				)
			)
		else
			nav:attr('aria-label', cfg.aria_label)
		end
	elseif border == cfg.keyword.border_subgroup then
		-- We assume that this navbox is being rendered in a list cell of a
		-- parent navbox, and is therefore inside a div with padding:0em 0.25em.
		-- We start with a </div> to avoid the padding being applied, and at the
		-- end add a <div> to balance out the parent's </div>
		res
			:wikitext('</div>')
			:node(tbl)
			:wikitext('<div>')
	else
		res:node(add_navbox_styles(hiding_templatestyles))
		local nav = res:tag('div')
			:attr('role', 'navigation')
			:addClass(cfg.class.navbox)
			:addClass(args[cfg.arg.navboxclass])
			:cssText(args[cfg.arg.bodystyle])
			:cssText(args[cfg.arg.style])
			:css('padding', '3px')
			:node(tbl)
		-- aria-labelledby title, otherwise above, otherwise lone group
		if args[cfg.arg.title] or args[cfg.arg.above]
			or (args[cfg.arg.group1] and not args[cfg.arg.group2]) then
			nav:attr(
				'aria-labelledby',
				mw.uri.anchorEncode(args[cfg.arg.title] or args[cfg.arg.above] or args[cfg.arg.group1])
			)
		else
			nav:attr('aria-label', cfg.aria_label)
		end
	end

	if (args[cfg.arg.nocat] or cfg.keyword.nocat_false):lower() == cfg.keyword.nocat_false then
		renderTrackingCategories(res, border)
	end
	return striped(tostring(res), border)
end

function p.navbox(frame)
	if not getArgs then
		getArgs = require('Module:Arguments').getArgs
	end
	args = getArgs(frame, {wrappers = {cfg.pattern.navbox}})

	-- Read the arguments in the order they'll be output in, to make references
	-- number in the right order.
	local _
	_ = args[cfg.arg.title]
	_ = args[cfg.arg.above]
	-- Limit this to 20 as covering 'most' cases (that's a SWAG) and because
	-- iterator approach won't work here
	for i = 1, 20 do
		_ = args[format(cfg.arg.group_and_num, i)]
		_ = args[format(cfg.arg.list_and_num, i)]
	end
	_ = args[cfg.arg.below]

	return p._navbox(args)
end

return p