Module:Navbox: Difference between revisions

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local args
local args
local tableRowAdded = false
local border
local border
local listnums = {}
local listnums
local ODD_EVEN_MARKER = '\127_ODDEVEN_\127'
local RESTART_MARKER = '\127_ODDEVEN0_\127'
local REGEX_MARKER = '\127_ODDEVEN(%d?)_\127'


local function trim(s)
local function striped(wikitext)
    return (mw.ustring.gsub(s, "^%s*(.-)%s*$", "%1"))
-- 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 = '[[Category:Navbox orphans]]'
if border == 'subgroup' and args.orphan ~= 'yes' then
-- No change; striping occurs in outermost navbox.
return wikitext .. orphanCat
end
local first, second = 'odd', 'even'
if args.evenodd then
if args.evenodd == 'swap' then
first, second = second, first
else
first = args.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(REGEX_MARKER, changer)) -- () omits gsub count
end
end


local function addNewline(s)
local function processItem(item, nowrapitems)
    if s:match('^[*:;#]') or s:match('^{|') then
if item:sub(1, 2) == '{|' then
        return '\n' .. s ..'\n'
-- Applying nowrap to lines in a table does not make sense.
    else
-- Add newlines to compensate for trim of x in |parm=x in a template.
        return s
return '\n' .. item ..'\n'
    end
end
end
if nowrapitems == 'yes' then
 
local lines = {}
local function addTableRow(tbl)
for line in (item .. '\n'):gmatch('([^\n]*)\n') do
    -- If any other rows have already been added, then we add a 2px gutter row.
local prefix, content = line:match('^([*:;#]+)%s*(.*)')
    if tableRowAdded then
if prefix and not content:match('^<span class="nowrap">') then
        tbl
line = prefix .. '<span class="nowrap">' .. content .. '</span>'
            :tag('tr')
end
                :css('height', '2px')
table.insert(lines, line)
                :tag('td')
end
                    :attr('colspan',2)
item = table.concat(lines, '\n')
    end
end
 
if item:match('^[*:;#]') then
    tableRowAdded = true
return '\n' .. item ..'\n'
 
end
    return tbl:tag('tr')
return item
end
end


local function renderNavBar(titleCell)
local function renderNavBar(titleCell)
    -- Depending on the presence of the navbar and/or show/hide link, we may need to add a spacer div on the left
    -- or right to keep the title centered.
    local spacerSide = nil


    if args.navbar == 'off' then
if args.navbar ~= 'off' and args.navbar ~= 'plain' and not (not args.name and mw.getCurrentFrame():getParent():getTitle():gsub('/sandbox$', '') == 'Template:Navbox') then
        -- No navbar, and client wants no spacer, i.e. wants the title to be shifted to the left. If there's
titleCell:wikitext(navbar{
        -- also no show/hide link, then we need a spacer on the right to achieve the left shift.
args.name,
        if args.state == 'plain' then spacerSide = 'right' end
mini = 1,
    elseif args.navbar == 'plain' or (not args.name and mw.getCurrentFrame():getParent():getTitle():gsub('/sandbox$', '') == 'Template:Navbox') then
fontstyle = (args.basestyle or '') .. ';' .. (args.titlestyle or '') .. ';background:none transparent;border:none;box-shadow:none;padding:0;'
        -- No navbar. Need a spacer on the left to balance out the width of the show/hide link.
})
        if args.state ~= 'plain' then spacerSide = 'left' end
end
    else
        -- Will render navbar (or error message). If there's no show/hide link, need a spacer on the right
        -- to balance out the width of the navbar.
        if args.state == 'plain' then spacerSide = 'right' end


        titleCell:wikitext(navbar{
            args.name,
            mini = 1,
            fontstyle = (args.basestyle or '') .. ';' .. (args.titlestyle or '') ..  ';background:none transparent;border:none;'
        })
    end
    -- Render the spacer div.
    if spacerSide then
        titleCell
            :tag('span')
                :css('float', spacerSide)
                :css('width', '6em')
                :wikitext('&nbsp;')
    end
end
end


Line 78: Line 95:
--
--
local function renderTitleRow(tbl)
local function renderTitleRow(tbl)
    if not args.title then return end
if not args.title then return end


    local titleRow = addTableRow(tbl)
local titleRow = tbl:tag('tr')


    if args.titlegroup then
if args.titlegroup then
        titleRow
titleRow
            :tag('th')
:tag('th')
                :attr('scope', 'row')
:attr('scope', 'row')
                :addClass('navbox-group')
:addClass('navbox-group')
                :addClass(args.titlegroupclass)
:addClass(args.titlegroupclass)
                :cssText(args.basestyle)
:cssText(args.basestyle)
                :cssText(args.groupstyle)
:cssText(args.groupstyle)
                :cssText(args.titlegroupstyle)
:cssText(args.titlegroupstyle)
                :wikitext(args.titlegroup)
:wikitext(args.titlegroup)
    end
end


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


    if args.titlegroup then
if args.titlegroup then
        titleCell
titleCell
            :css('border-left', '2px solid #fdfdfd')
:css('border-left', '2px solid #fdfdfd')
            :css('width', '100%')
:css('width', '100%')
    end
end


    local titleColspan = 2
local titleColspan = 2
    if args.imageleft then titleColspan = titleColspan + 1 end
if args.imageleft then titleColspan = titleColspan + 1 end
    if args.image then titleColspan = titleColspan + 1 end
if args.image then titleColspan = titleColspan + 1 end
    if args.titlegroup then titleColspan = titleColspan - 1 end
if args.titlegroup then titleColspan = titleColspan - 1 end


    titleCell
titleCell
        :cssText(args.basestyle)
:cssText(args.basestyle)
        :cssText(args.titlestyle)
:cssText(args.titlestyle)
        :addClass('navbox-title')
:addClass('navbox-title')
        :attr('colspan', titleColspan)
:attr('colspan', titleColspan)


    renderNavBar(titleCell)
renderNavBar(titleCell)


    titleCell
titleCell
        :tag('div')
:tag('div')
            :addClass(args.titleclass)
-- id for aria-labelledby attribute
            :css('font-size', '110%')
:attr('id', mw.uri.anchorEncode(args.title))
            :wikitext(addNewline(args.title))
:addClass(args.titleclass)
:css('font-size', '114%')
:css('margin', '0 4em')
:wikitext(processItem(args.title))
end
end


Line 127: Line 147:


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


local function renderAboveRow(tbl)
local function renderAboveRow(tbl)
    if not args.above then return end
if not args.above then return end


    addTableRow(tbl)
tbl:tag('tr')
        :tag('td')
:tag('td')
            :addClass('navbox-abovebelow')
:addClass('navbox-abovebelow')
            :addClass(args.aboveclass)
:addClass(args.aboveclass)
            :cssText(args.basestyle)
:cssText(args.basestyle)
            :cssText(args.abovestyle)
:cssText(args.abovestyle)
            :attr('colspan', getAboveBelowColspan())
:attr('colspan', getAboveBelowColspan())
            :tag('div')
:tag('div')
                :wikitext(addNewline(args.above))
-- id for aria-labelledby attribute, if no title
:attr('id', args.title and nil or mw.uri.anchorEncode(args.above))
:wikitext(processItem(args.above, args.nowrapitems))
end
end


local function renderBelowRow(tbl)
local function renderBelowRow(tbl)
    if not args.below then return end
if not args.below then return end


    addTableRow(tbl)
tbl:tag('tr')
        :tag('td')
:tag('td')
            :addClass('navbox-abovebelow')
:addClass('navbox-abovebelow')
            :addClass(args.belowclass)
:addClass(args.belowclass)
            :cssText(args.basestyle)
:cssText(args.basestyle)
            :cssText(args.belowstyle)
:cssText(args.belowstyle)
            :attr('colspan', getAboveBelowColspan())
:attr('colspan', getAboveBelowColspan())
            :tag('div')
:tag('div')
                :wikitext(addNewline(args.below))
:wikitext(processItem(args.below, args.nowrapitems))
end
end


Line 164: Line 186:
--  List rows
--  List rows
--
--
local function renderListRow(tbl, listnum)
local function renderListRow(tbl, index, listnum)
    local row = addTableRow(tbl)
local row = tbl:tag('tr')
 
    if listnum == 1 and args.imageleft then
        row
            :tag('td')
                :addClass('navbox-image')
                :addClass(args.imageclass)
                :css('width', '0%')
                :css('padding', '0px 2px 0px 0px')
                :cssText(args.imageleftstyle)
                :attr('rowspan', 2 * #listnums - 1)
                :tag('div')
                    :wikitext(addNewline(args.imageleft))
    end


    if args['group' .. listnum] then
if index == 1 and args.imageleft then
        local groupCell = row:tag('th')
row
:tag('td')
:addClass('noviewer')
:addClass('navbox-image')
:addClass(args.imageclass)
:css('width', '1px')              -- Minimize width
:css('padding', '0px 2px 0px 0px')
:cssText(args.imageleftstyle)
:attr('rowspan', #listnums)
:tag('div')
:wikitext(processItem(args.imageleft))
end


        groupCell
if args['group' .. listnum] then
            :attr('scope', 'row')
local groupCell = row:tag('th')
            :addClass('navbox-group')
            :addClass(args.groupclass)
            :cssText(args.basestyle)


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


        groupCell
groupCell
            :cssText(args.groupstyle)
:attr('scope', 'row')
            :cssText(args['group' .. listnum .. 'style'])
:addClass('navbox-group')
            :wikitext(args['group' .. listnum])
:addClass(args.groupclass)
    end
:cssText(args.basestyle)
:css('width', args.groupwidth or '1%') -- If groupwidth not specified, minimize width


    local listCell = row:tag('td')
groupCell
:cssText(args.groupstyle)
:cssText(args['group' .. listnum .. 'style'])
:wikitext(args['group' .. listnum])
end


    if args['group' .. listnum] then
local listCell = row:tag('td')
        listCell
            :css('text-align', 'left')
            :css('border-left-width', '2px')
            :css('border-left-style', 'solid')
    else
        listCell:attr('colspan', 2)
    end


    if not args.groupwidth then
if args['group' .. listnum] then
        listCell:css('width', '100%')
listCell
    end
:css('text-align', 'left')
:css('border-left-width', '2px')
:css('border-left-style', 'solid')
else
listCell:attr('colspan', 2)
end


    local isOdd = (listnum % 2) == 1
if not args.groupwidth then
    local rowstyle = args.evenstyle
listCell:css('width', '100%')
    if isOdd then rowstyle = args.oddstyle end
end


    local evenOdd
local rowstyle  -- usually nil so cssText(rowstyle) usually adds nothing
    if args.evenodd == 'swap' then
if index % 2 == 1 then
        if isOdd then evenOdd = 'even' else evenOdd = 'odd' end
rowstyle = args.oddstyle
    else
else
        if isOdd then evenOdd = args.evenodd or 'odd' else evenOdd = args.evenodd or 'even' end
rowstyle = args.evenstyle
    end
end


    listCell
local listText = args['list' .. listnum]
        :css('padding', '0px')
local oddEven = ODD_EVEN_MARKER
        :cssText(args.liststyle)
if listText:sub(1, 12) == '</div><table' then
        :cssText(rowstyle)
-- Assume list text is for a subgroup navbox so no automatic striping for this row.
        :cssText(args['list' .. listnum .. 'style'])
oddEven = listText:find('<th[^>]*"navbox%-title"') and RESTART_MARKER or 'odd'
        :addClass('navbox-list')
end
        :addClass('navbox-' .. evenOdd)
listCell
        :addClass(args.listclass)
:css('padding', '0px')
        :tag('div')
:cssText(args.liststyle)
            :css('padding', (listnum == 1 and args.list1padding) or args.listpadding or '0em 0.25em')
:cssText(rowstyle)
            :wikitext(addNewline(args['list' .. listnum]))
:cssText(args['list' .. listnum .. 'style'])
:addClass('navbox-list')
:addClass('navbox-' .. oddEven)
:addClass(args.listclass)
:addClass(args['list' .. listnum .. 'class'])
:tag('div')
:css('padding', (index == 1 and args.list1padding) or args.listpadding or '0em 0.25em')
:wikitext(processItem(listText, args.nowrapitems))


    if listnum == 1 and args.image then
if index == 1 and args.image then
        row
row
            :tag('td')
:tag('td')
                :addClass('navbox-image')
:addClass('noviewer')
                :addClass(args.imageclass)
:addClass('navbox-image')
                :css('width', '0%')
:addClass(args.imageclass)
                :css('padding', '0px 0px 0px 2px')
:css('width', '1px')               -- Minimize width
                :cssText(args.imagestyle)
:css('padding', '0px 0px 0px 2px')
                :attr('rowspan', 2 * #listnums - 1)
:cssText(args.imagestyle)
                :tag('div')
:attr('rowspan', #listnums)
                    :wikitext(addNewline(args.image))
:tag('div')
    end
:wikitext(processItem(args.image))
end
end
end


Line 257: Line 287:


local function needsHorizontalLists()
local function needsHorizontalLists()
    if border == 'child' or border == 'subgroup' or args.tracking == 'no' then return false end
if border == 'subgroup' or args.tracking == 'no' then
return false
end
local listClasses = {
['plainlist'] = true, ['hlist'] = true, ['hlist hnum'] = true,
['hlist hwrap'] = true, ['hlist vcard'] = true, ['vcard hlist'] = true,
['hlist vevent'] = true,
}
return not (listClasses[args.listclass] or listClasses[args.bodyclass])
end


    local listClasses = {'plainlist', 'hlist', 'hlist hnum', 'hlist hwrap', 'hlist vcard', 'vcard hlist', 'hlist vevent'}
local function hasBackgroundColors()
    for i, cls in ipairs(listClasses) do
for _, key in ipairs({'titlestyle', 'groupstyle', 'basestyle', 'abovestyle', 'belowstyle'}) do
        if args.listclass == cls or args.bodyclass == cls then
if tostring(args[key]):find('background', 1, true) then
            return false
return true
        end
end
    end
end
end


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


local function hasBackgroundColors()
local function isIllegible()
    return mw.ustring.match(args.titlestyle or '','background') or mw.ustring.match(args.groupstyle or '','background') or mw.ustring.match(args.basestyle or '','background')
local styleratio = require('Module:Color contrast')._styleratio
 
for key, style in pairs(args) do
if tostring(key):match("style$") then
if styleratio{mw.text.unstripNoWiki(style)} < 4.5 then
return true
end
end
end
return false
end
end


local function getTrackingCategories()
local function getTrackingCategories()
    local cats = {}
local cats = {}
    if needsHorizontalLists() then table.insert(cats, 'Navigational boxes without horizontal lists') end
if needsHorizontalLists() then table.insert(cats, 'Navigational boxes without horizontal lists') end
    if hasBackgroundColors() then table.insert(cats, 'Navboxes using background colours') end
if hasBackgroundColors() then table.insert(cats, 'Navboxes using background colours') end
    return cats
if isIllegible() then table.insert(cats, 'Potentially illegible navboxes') end
if hasBorders() then table.insert(cats, 'Navboxes using borders') end
return cats
end
end


local function renderTrackingCategories(builder)
local function renderTrackingCategories(builder)
    local title = mw.title.getCurrentTitle()
local title = mw.title.getCurrentTitle()
    if title.namespace ~= 10 then return end -- not in template space
if title.namespace ~= 10 then return end -- not in template space
    local subpage = title.subpageText
local subpage = title.subpageText
    if subpage == 'doc' or subpage == 'sandbox' or subpage == 'testcases' then return end
if subpage == 'doc' or subpage == 'sandbox' or subpage == 'testcases' then return end


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


Line 295: Line 351:
--
--
local function renderMainTable()
local function renderMainTable()
    local tbl = mw.html.create('table')
local tbl = mw.html.create('table')
        :addClass('nowraplinks')
:addClass('nowraplinks')
        :addClass(args.bodyclass)
:addClass(args.bodyclass)


    if args.title and (args.state ~= 'plain' and args.state ~= 'off') then
if args.title and (args.state ~= 'plain' and args.state ~= 'off') then
        tbl
if args.state == 'collapsed' then args.state = 'mw-collapsed' end
            :addClass('collapsible')
tbl
            :addClass(args.state or 'autocollapse')
:addClass('mw-collapsible')
    end
:addClass(args.state or 'autocollapse')
end


    tbl:css('border-spacing', 0)
tbl:css('border-spacing', 0)
    if border == 'subgroup' or border == 'child' or border == 'none' then
if border == 'subgroup' or border == 'none' then
        tbl
tbl
            :addClass('navbox-subgroup')
:addClass('navbox-subgroup')
            :cssText(args.bodystyle)
:cssText(args.bodystyle)
            :cssText(args.style)
:cssText(args.style)
    else -- regular navobx - bodystyle and style will be applied to the wrapper table
else -- regular navbox - bodystyle and style will be applied to the wrapper table
        tbl
tbl
            :addClass('navbox-inner')
:addClass('navbox-inner')
            :css('background', 'transparent')
:css('background', 'transparent')
            :css('color', 'inherit')
:css('color', 'inherit')
    end
end
    tbl:cssText(args.innerstyle)
tbl:cssText(args.innerstyle)


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


    return tbl
return tbl
end
end


function p._navbox(navboxArgs)
function p._navbox(navboxArgs)
    args = navboxArgs
args = navboxArgs
 
listnums = {}
    for k, v in pairs(args) do
        local listnum = ('' .. k):match('^list(%d+)$')
        if listnum then table.insert(listnums, tonumber(listnum)) end
    end
    table.sort(listnums)


    border = trim(args.border or args[1] or '')
for k, _ in pairs(args) do
if type(k) == 'string' then
local listnum = k:match('^list(%d+)$')
if listnum then table.insert(listnums, tonumber(listnum)) end
end
end
table.sort(listnums)


    -- render the main body of the navbox
border = mw.text.trim(args.border or args[1] or '')
    local tbl = renderMainTable()
if border == 'child' then
border = 'subgroup'
end


    -- render the appropriate wrapper around the navbox, depending on the border param
-- render the main body of the navbox
    local res = mw.html.create()
local tbl = renderMainTable()
    if border == 'none' then
        res:node(tbl)
    elseif border == 'subgroup' or border == 'child' 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>') -- XXX: hack due to lack of unclosed support in mw.html.
            :node(tbl)
            :wikitext('<div>') -- XXX: hack due to lack of unclosed support in mw.html.
    else
        res
            :tag('table')
                :addClass('navbox')
                :css('border-spacing', 0)
                :cssText(args.bodystyle)
                :cssText(args.style)
                :tag('tr')
                    :tag('td')
                        :css('padding', '2px')
                        :node(tbl)
    end


    renderTrackingCategories(res)
-- render the appropriate wrapper around the navbox, depending on the border param
local res = mw.html.create()
if border == 'none' then
local nav = res:tag('div')
:attr('role', 'navigation')
:node(tbl)
-- aria-labelledby title, otherwise above, otherwise lone group
if args.title or args.above or (args.group1 and not args.group2) then
nav:attr('aria-labelledby', mw.uri.anchorEncode(args.title or args.above or args.group1))
else
nav:attr('aria-label', 'Navbox')
end
elseif 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
local nav = res:tag('div')
:attr('role', 'navigation')
:addClass('navbox')
:addClass(args.navboxclass)
:cssText(args.bodystyle)
:cssText(args.style)
:css('padding', '3px')
:node(tbl)
-- aria-labelledby title, otherwise above, otherwise lone group
if args.title or args.above or (args.group1 and not args.group2) then
nav:attr('aria-labelledby', mw.uri.anchorEncode(args.title or args.above or args.group1))
else
nav:attr('aria-label', 'Navbox')
end
end


    return tostring(res)
if (args.nocat or 'false'):lower() == 'false' then
renderTrackingCategories(res)
end
return striped(tostring(res))
end
end


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


    -- Read the arguments in the order they'll be output in, to make references number in the right order.
-- Read the arguments in the order they'll be output in, to make references number in the right order.
    local _
local _
    _ = args.title
_ = args.title
    _ = args.above
_ = args.above
    for i = 1, 20 do
for i = 1, 20 do
        _ = args["group" .. tostring(i)]
_ = args["group" .. tostring(i)]
        _ = args["list" .. tostring(i)]
_ = args["list" .. tostring(i)]
    end
end
    _ = args.below
_ = args.below


    return p._navbox(args)
return p._navbox(args)
end
end


return p
return p

Revision as of 19:09, 1 January 2021

Documentation for this module may be created at Module:Navbox/doc

--
-- This module implements {{Navbox}}
--

local p = {}

local navbar = require('Module:Navbar')._navbar
local getArgs -- lazily initialized

local args
local border
local listnums
local ODD_EVEN_MARKER = '\127_ODDEVEN_\127'
local RESTART_MARKER = '\127_ODDEVEN0_\127'
local REGEX_MARKER = '\127_ODDEVEN(%d?)_\127'

local function striped(wikitext)
	-- 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 = '[[Category:Navbox orphans]]'
	if border == 'subgroup' and args.orphan ~= 'yes' then
		-- No change; striping occurs in outermost navbox.
		return wikitext .. orphanCat
	end
	local first, second = 'odd', 'even'
	if args.evenodd then
		if args.evenodd == 'swap' then
			first, second = second, first
		else
			first = args.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(REGEX_MARKER, 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 == '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('^<span class="nowrap">') then
				line = prefix .. '<span class="nowrap">' .. content .. '</span>'
			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 renderNavBar(titleCell)

	if args.navbar ~= 'off' and args.navbar ~= 'plain' and not (not args.name and mw.getCurrentFrame():getParent():getTitle():gsub('/sandbox$', '') == 'Template:Navbox') then
		titleCell:wikitext(navbar{
			args.name,
			mini = 1,
			fontstyle = (args.basestyle or '') .. ';' .. (args.titlestyle or '') .. ';background:none transparent;border:none;box-shadow:none;padding:0;'
		})
	end

end

--
--   Title row
--
local function renderTitleRow(tbl)
	if not args.title then return end

	local titleRow = tbl:tag('tr')

	if args.titlegroup then
		titleRow
			:tag('th')
				:attr('scope', 'row')
				:addClass('navbox-group')
				:addClass(args.titlegroupclass)
				:cssText(args.basestyle)
				:cssText(args.groupstyle)
				:cssText(args.titlegroupstyle)
				:wikitext(args.titlegroup)
	end

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

	if args.titlegroup then
		titleCell
			:css('border-left', '2px solid #fdfdfd')
			:css('width', '100%')
	end

	local titleColspan = 2
	if args.imageleft then titleColspan = titleColspan + 1 end
	if args.image then titleColspan = titleColspan + 1 end
	if args.titlegroup then titleColspan = titleColspan - 1 end

	titleCell
		:cssText(args.basestyle)
		:cssText(args.titlestyle)
		:addClass('navbox-title')
		:attr('colspan', titleColspan)

	renderNavBar(titleCell)

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

--
--   Above/Below rows
--

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

local function renderAboveRow(tbl)
	if not args.above then return end

	tbl:tag('tr')
		:tag('td')
			:addClass('navbox-abovebelow')
			:addClass(args.aboveclass)
			:cssText(args.basestyle)
			:cssText(args.abovestyle)
			:attr('colspan', getAboveBelowColspan())
			:tag('div')
				-- id for aria-labelledby attribute, if no title
				:attr('id', args.title and nil or mw.uri.anchorEncode(args.above))
				:wikitext(processItem(args.above, args.nowrapitems))
end

local function renderBelowRow(tbl)
	if not args.below then return end

	tbl:tag('tr')
		:tag('td')
			:addClass('navbox-abovebelow')
			:addClass(args.belowclass)
			:cssText(args.basestyle)
			:cssText(args.belowstyle)
			:attr('colspan', getAboveBelowColspan())
			:tag('div')
				:wikitext(processItem(args.below, args.nowrapitems))
end

--
--   List rows
--
local function renderListRow(tbl, index, listnum)
	local row = tbl:tag('tr')

	if index == 1 and args.imageleft then
		row
			:tag('td')
				:addClass('noviewer')
				:addClass('navbox-image')
				:addClass(args.imageclass)
				:css('width', '1px')               -- Minimize width
				:css('padding', '0px 2px 0px 0px')
				:cssText(args.imageleftstyle)
				:attr('rowspan', #listnums)
				:tag('div')
					:wikitext(processItem(args.imageleft))
	end

	if args['group' .. listnum] 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.title or args.above or args.group2) then
			groupCell
				:attr('id', mw.uri.anchorEncode(args.group1))
		end

		groupCell
			:attr('scope', 'row')
			:addClass('navbox-group')
			:addClass(args.groupclass)
			:cssText(args.basestyle)
			:css('width', args.groupwidth or '1%') -- If groupwidth not specified, minimize width

		groupCell
			:cssText(args.groupstyle)
			:cssText(args['group' .. listnum .. 'style'])
			:wikitext(args['group' .. listnum])
	end

	local listCell = row:tag('td')

	if args['group' .. listnum] then
		listCell
			:css('text-align', 'left')
			:css('border-left-width', '2px')
			:css('border-left-style', 'solid')
	else
		listCell:attr('colspan', 2)
	end

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

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

	local listText = args['list' .. listnum]
	local oddEven = ODD_EVEN_MARKER
	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('<th[^>]*"navbox%-title"') and RESTART_MARKER or 'odd'
	end
	listCell
		:css('padding', '0px')
		:cssText(args.liststyle)
		:cssText(rowstyle)
		:cssText(args['list' .. listnum .. 'style'])
		:addClass('navbox-list')
		:addClass('navbox-' .. oddEven)
		:addClass(args.listclass)
		:addClass(args['list' .. listnum .. 'class'])
		:tag('div')
			:css('padding', (index == 1 and args.list1padding) or args.listpadding or '0em 0.25em')
			:wikitext(processItem(listText, args.nowrapitems))

	if index == 1 and args.image then
		row
			:tag('td')
				:addClass('noviewer')
				:addClass('navbox-image')
				:addClass(args.imageclass)
				:css('width', '1px')               -- Minimize width
				:css('padding', '0px 0px 0px 2px')
				:cssText(args.imagestyle)
				:attr('rowspan', #listnums)
				:tag('div')
					:wikitext(processItem(args.image))
	end
end


--
--   Tracking categories
--

local function needsHorizontalLists()
	if border == 'subgroup' or args.tracking == 'no' then
		return false
	end
	local listClasses = {
		['plainlist'] = true, ['hlist'] = true, ['hlist hnum'] = true,
		['hlist hwrap'] = true, ['hlist vcard'] = true, ['vcard hlist'] = true,
		['hlist vevent'] = true,
	}
	return not (listClasses[args.listclass] or listClasses[args.bodyclass])
end

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

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

local function isIllegible()
	local styleratio = require('Module:Color contrast')._styleratio

	for key, style in pairs(args) do
		if tostring(key):match("style$") then
			if styleratio{mw.text.unstripNoWiki(style)} < 4.5 then
				return true
			end
		end
	end
	return false
end

local function getTrackingCategories()
	local cats = {}
	if needsHorizontalLists() then table.insert(cats, 'Navigational boxes without horizontal lists') end
	if hasBackgroundColors() then table.insert(cats, 'Navboxes using background colours') end
	if isIllegible() then table.insert(cats, 'Potentially illegible navboxes') end
	if hasBorders() then table.insert(cats, 'Navboxes using borders') end
	return cats
end

local function renderTrackingCategories(builder)
	local title = mw.title.getCurrentTitle()
	if title.namespace ~= 10 then return end -- not in template space
	local subpage = title.subpageText
	if subpage == 'doc' or subpage == 'sandbox' or subpage == 'testcases' then return end

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

--
--   Main navbox tables
--
local function renderMainTable()
	local tbl = mw.html.create('table')
		:addClass('nowraplinks')
		:addClass(args.bodyclass)

	if args.title and (args.state ~= 'plain' and args.state ~= 'off') then
		if args.state == 'collapsed' then args.state = 'mw-collapsed' end
		tbl
			:addClass('mw-collapsible')
			:addClass(args.state or 'autocollapse')
	end

	tbl:css('border-spacing', 0)
	if border == 'subgroup' or border == 'none' then
		tbl
			:addClass('navbox-subgroup')
			:cssText(args.bodystyle)
			:cssText(args.style)
	else  -- regular navbox - bodystyle and style will be applied to the wrapper table
		tbl
			:addClass('navbox-inner')
			:css('background', 'transparent')
			:css('color', 'inherit')
	end
	tbl:cssText(args.innerstyle)

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

	return tbl
end

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

	for k, _ in pairs(args) do
		if type(k) == 'string' then
			local listnum = k:match('^list(%d+)$')
			if listnum then table.insert(listnums, tonumber(listnum)) end
		end
	end
	table.sort(listnums)

	border = mw.text.trim(args.border or args[1] or '')
	if border == 'child' then
		border = 'subgroup'
	end

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

	-- render the appropriate wrapper around the navbox, depending on the border param
	local res = mw.html.create()
	if border == 'none' then
		local nav = res:tag('div')
			:attr('role', 'navigation')
			:node(tbl)
		-- aria-labelledby title, otherwise above, otherwise lone group
		if args.title or args.above or (args.group1 and not args.group2) then
			nav:attr('aria-labelledby', mw.uri.anchorEncode(args.title or args.above or args.group1))
		else
			nav:attr('aria-label', 'Navbox')
		end
	elseif 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
		local nav = res:tag('div')
			:attr('role', 'navigation')
			:addClass('navbox')
			:addClass(args.navboxclass)
			:cssText(args.bodystyle)
			:cssText(args.style)
			:css('padding', '3px')
			:node(tbl)
		-- aria-labelledby title, otherwise above, otherwise lone group
		if args.title or args.above or (args.group1 and not args.group2) then
			nav:attr('aria-labelledby', mw.uri.anchorEncode(args.title or args.above or args.group1))
		else
			nav:attr('aria-label', 'Navbox')
		end
	end

	if (args.nocat or 'false'):lower() == 'false' then
		renderTrackingCategories(res)
	end
	return striped(tostring(res))
end

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

	-- Read the arguments in the order they'll be output in, to make references number in the right order.
	local _
	_ = args.title
	_ = args.above
	for i = 1, 20 do
		_ = args["group" .. tostring(i)]
		_ = args["list" .. tostring(i)]
	end
	_ = args.below

	return p._navbox(args)
end

return p