Difference between revisions of "Module:Navbox"

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(Created page with "-- -- This module will implement {{Navbox}} -- local p = {} local HtmlBuilder = require('Module:HtmlBuilder') local navbar = require('Module:Navbar')._navbar local getArgs...")
 
 
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--
--
-- This module will implement {{Navbox}}
-- This module implements {{Navbox}}
--
--
 
local p = {}
local p = {}
 
local HtmlBuilder = require('Module:HtmlBuilder')
local navbar = require('Module:Navbar')._navbar
local navbar = require('Module:Navbar')._navbar
local getArgs -- lazily initialized
local getArgs -- lazily initialized
 
local args
local args
local tableRowAdded = false
local tableRowAdded = false
local border
local border
local listnums = {}
local listnums = {}
local ODD_EVEN_MARKER = '\127_ODDEVEN_\127'
local function trim(s)
local RESTART_MARKER = '\127_ODDEVEN0_\127'
    return (mw.ustring.gsub(s, "^%s*(.-)%s*$", "%1"))
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
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
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
end
 
local function addTableRow(tbl)
local function addTableRow(tbl)
    -- If any other rows have already been added, then we add a 2px gutter row.
-- If any other rows have already been added, then we add a 2px gutter row.
    if tableRowAdded then
if tableRowAdded then
        tbl
tbl
            .tag('tr')
:tag('tr')
                .css('height', '2px')
:css('height', '2px')
                .tag('td')
:tag('td')
                .attr('colspan',2)
:attr('colspan',2)
    end
end
 
    tableRowAdded = true
tableRowAdded = true
 
    return tbl.tag('tr')
return tbl:tag('tr')
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.
if args.navbar ~= 'off' and args.navbar ~= 'plain' and not (not args.name and mw.getCurrentFrame():getParent():getTitle():gsub('/sandbox$', '') == 'Template:Navbox') then
    local spacerSide = nil
titleCell:wikitext(navbar{
args.name,
    if args.navbar == 'off' then
mini = 1,
        -- No navbar, and client wants no spacer, i.e. wants the title to be shifted to the left. If there's
fontstyle = (args.basestyle or '') .. ';' .. (args.titlestyle or '') .. ';background:none transparent;border:none;'
        -- also no show/hide link, then we need a spacer on the right to achieve the left shift.
})
        if args.state == 'plain' then spacerSide = 'right' end
end
    elseif args.navbar == 'plain' or (not args.name and mw.getCurrentFrame():getParent():getTitle() == 'Template:Navbox' and (border == 'subgroup' or border == 'child' or border == 'none')) then
 
        -- 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
    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
 
--
--
--  Title row
--  Title row
--
--
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 = addTableRow(tbl)
 
    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)
:attr('id', mw.uri.anchorEncode(args.title))
            .css('font-size', '110%')
:addClass(args.titleclass)
            .wikitext(addNewline(args.title))
:css('font-size', '114%')
:css('margin', '0 4em')
:wikitext(processItem(args.title))
end
end
 
--
--
--  Above/Below rows
--  Above/Below rows
--
--
 
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)
addTableRow(tbl)
        .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))
: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)
addTableRow(tbl)
        .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
 
--
--
--  List rows
--  List rows
--
--
local function renderListRow(tbl, listnum)
local function renderListRow(tbl, index, listnum)
    local row = addTableRow(tbl)
local row = addTableRow(tbl)
 
    if listnum == 1 and args.imageleft then
if index == 1 and args.imageleft then
        row
row
            .tag('td')
:tag('td')
                .addClass('navbox-image')
:addClass('navbox-image')
                .addClass(args.imageclass)
:addClass(args.imageclass)
                .css('width', '0%')
:css('width', '0%')
                .css('padding', '0px 2px 0px 0px')
:css('padding', '0px 2px 0px 0px')
                .cssText(args.imageleftstyle)
:cssText(args.imageleftstyle)
                .attr('rowspan', 2 * #listnums - 1)
:attr('rowspan', 2 * #listnums - 1)
                .tag('div')
:tag('div')
                    .wikitext(addNewline(args.imageleft))
:wikitext(processItem(args.imageleft))
    end
end
 
    if args['group' .. listnum] then
if args['group' .. listnum] then
        local groupCell = row.tag('th')
local groupCell = row:tag('th')
 
        groupCell
groupCell
              .attr('scope', 'row')
:attr('scope', 'row')
              .addClass('navbox-group')
:addClass('navbox-group')
              .addClass(args.groupclass)
:addClass(args.groupclass)
              .cssText(args.basestyle)
:cssText(args.basestyle)
 
        if args.groupwidth then
if args.groupwidth then
            groupCell.css('width', args.groupwidth)
groupCell:css('width', args.groupwidth)
        end
end
 
        groupCell
groupCell
            .cssText(args.groupstyle)
:cssText(args.groupstyle)
            .cssText(args['group' .. listnum .. 'style'])
:cssText(args['group' .. listnum .. 'style'])
            .wikitext(args['group' .. listnum])
:wikitext(args['group' .. listnum])
    end
end
 
    local listCell = row.tag('td')
local listCell = row:tag('td')
 
    if args['group' .. listnum] then
if args['group' .. listnum] then
        listCell
listCell
            .css('text-align', 'left')
:css('text-align', 'left')
            .css('border-left-width', '2px')
:css('border-left-width', '2px')
            .css('border-left-style', 'solid')
:css('border-left-style', 'solid')
    else
else
        listCell.attr('colspan', 2)
listCell:attr('colspan', 2)
    end
end
 
    if not args.groupwidth then  
if not args.groupwidth then
        listCell.css('width', '100%')
listCell:css('width', '100%')
    end
end
 
    local isOdd = (listnum % 2) == 1
local rowstyle  -- usually nil so cssText(rowstyle) usually adds nothing
    local rowstyle = args.evenstyle
if index % 2 == 1 then
    if isOdd then rowstyle = args.oddstyle end
rowstyle = args.oddstyle
else
    local evenOdd
rowstyle = args.evenstyle
    if args.evenodd == 'swap' then
end
        if isOdd then evenOdd = 'even' else evenOdd = 'odd' end
 
    else
local listText = args['list' .. listnum]
        if isOdd then evenOdd = args.evenodd or 'odd' else evenOdd = args.evenodd or 'even' end
local oddEven = ODD_EVEN_MARKER
    end
if listText:sub(1, 12) == '</div><table' then
-- Assume list text is for a subgroup navbox so no automatic striping for this row.
    listCell
oddEven = listText:find('<th[^>]*"navbox%-title"') and RESTART_MARKER or 'odd'
        .css('padding', '0px')
end
        .cssText(args.liststyle)
listCell
        .cssText(rowstyle)
:css('padding', '0px')
        .cssText(args['list' .. listnum .. 'style'])
:cssText(args.liststyle)
        .addClass('navbox-list')
:cssText(rowstyle)
        .addClass('navbox-' .. evenOdd)
:cssText(args['list' .. listnum .. 'style'])
        .addClass(args.listclass)
:addClass('navbox-list')
        .tag('div')
:addClass('navbox-' .. oddEven)
            .css('padding', (listnum == 1 and args.list1padding) or args.listpadding or '0em 0.25em')
:addClass(args.listclass)
            .wikitext(addNewline(args['list' .. listnum]))
:tag('div')
:css('padding', (index == 1 and args.list1padding) or args.listpadding or '0em 0.25em')
    if listnum == 1 and args.image then
:wikitext(processItem(listText, args.nowrapitems))
        row
 
            .tag('td')
if index == 1 and args.image then
                .addClass('navbox-image')
row
                .addClass(args.imageclass)
:tag('td')
                .css('width', '0%')
:addClass('navbox-image')
                .css('padding', '0px 0px 0px 2px')
:addClass(args.imageclass)
                .cssText(args.imagestyle)
:css('width', '0%')
                .attr('rowspan', 2 * #listnums - 1)
:css('padding', '0px 0px 0px 2px')
                .tag('div')
:cssText(args.imagestyle)
                    .wikitext(addNewline(args.image))
:attr('rowspan', 2 * #listnums - 1)
    end
:tag('div')
:wikitext(processItem(args.image))
end
end
end
 
 
--
--
--  Tracking categories
--  Tracking categories
--
--
 
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
    local listClasses = {'plainlist', 'hlist', 'hlist hnum', 'hlist hwrap', 'hlist vcard', 'vcard hlist', 'hlist vevent'}
end
    for i, cls in ipairs(listClasses) do
local listClasses = {
        if args.listclass == cls or args.bodyclass == cls then
['plainlist'] = true, ['hlist'] = true, ['hlist hnum'] = true,
            return false
['hlist hwrap'] = true, ['hlist vcard'] = true, ['vcard hlist'] = true,
        end
['hlist vevent'] = true,
    end
}
return not (listClasses[args.listclass] or listClasses[args.bodyclass])
    return true
end
end
 
local function hasBackgroundColors()
local function hasBackgroundColors()
    return mw.ustring.match(args.titlestyle or '','background') or mw.ustring.match(args.groupstyle or '','background') or mw.ustring.match(args.basestyle or '','background')
for _, key in ipairs({'titlestyle', 'groupstyle', 'basestyle'}) do
if tostring(args[key]):find('background', 1, true) then
return true
end
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 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
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
 
--
--
--  Main navbox tables
--  Main navbox tables
--
--
local function renderMainTable()
local function renderMainTable()
    local tbl = HtmlBuilder.create('table')
local tbl = mw.html.create('table')
        .attr('cellspacing', 0)
: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
        tbl
:addClass('collapsible')
            .addClass('collapsible')
:addClass(args.state or 'autocollapse')
            .addClass(args.state or 'autocollapse')
end
    end
 
tbl:css('border-spacing', 0)
    tbl.css('border-spacing', 0)
if border == 'subgroup' or border == 'none' then
    if border == 'subgroup' or border == 'child' 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 navbox - bodystyle and style will be applied to the wrapper table
    else -- regular navobx - 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, i, listnum)
        renderListRow(tbl, 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
 
    for k, v in pairs(args) do
for k, _ in pairs(args) do
        local listnum = ('' .. k):match('^list(%d+)$')
if type(k) == 'string' then
        if listnum then table.insert(listnums, tonumber(listnum)) end
local listnum = k:match('^list(%d+)$')
    end
if listnum then table.insert(listnums, tonumber(listnum)) end
    table.sort(listnums)
end
end
    border = trim(args.border or args[1] or '')
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'
    -- render the appropriate wrapper around the navbox, depending on the border param
end
    local res = HtmlBuilder.create()
 
    if border == 'none' then
-- render the main body of the navbox
        res.node(tbl)
local tbl = renderMainTable()
    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
-- render the appropriate wrapper around the navbox, depending on the border param
        -- therefore inside a div with padding:0em 0.25em. We start with a </div> to avoid the
local res = mw.html.create()
        -- padding being applied, and at the end add a <div> to balance out the parent's </div>
if border == 'none' then
        res
local nav = res:tag('div')
            .tag('/div', {unclosed = true})
:attr('role', 'navigation')
                .done()
:node(tbl)
            .node(tbl)
if args.title then
            .tag('div', {unclosed = true})
nav:attr('aria-labelledby', mw.uri.anchorEncode(args.title))
    else
else
        res
nav:attr('aria-label', 'Navbox')
            .tag('table')
end
                .attr('cellspacing', 0)
elseif border == 'subgroup' then
                .addClass('navbox')
-- We assume that this navbox is being rendered in a list cell of a parent navbox, and is
                .css('border-spacing', 0)
-- therefore inside a div with padding:0em 0.25em. We start with a </div> to avoid the
                .cssText(args.bodystyle)
-- padding being applied, and at the end add a <div> to balance out the parent's </div>
                .cssText(args.style)
res
                .tag('tr')
:wikitext('</div>')
                    .tag('td')
:node(tbl)
                        .css('padding', '2px')
:wikitext('<div>')
                        .node(tbl)
else
    end
local nav = res:tag('div')
:attr('role', 'navigation')
    renderTrackingCategories(res)
:addClass('navbox')
:cssText(args.bodystyle)
    return tostring(res)
:cssText(args.style)
:css('padding', '3px')
:node(tbl)
if args.title then
nav:attr('aria-labelledby', mw.uri.anchorEncode(args.title))
else
nav:attr('aria-label', 'Navbox')
end
end
 
renderTrackingCategories(res)
 
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)
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

Latest revision as of 21:36, 18 May 2017

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 tableRowAdded = false
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 addTableRow(tbl)
	-- If any other rows have already been added, then we add a 2px gutter row.
	if tableRowAdded then
		tbl
			:tag('tr')
				:css('height', '2px')
				:tag('td')
					:attr('colspan',2)
	end

	tableRowAdded = true

	return tbl:tag('tr')
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;'
		})
	end

end

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

	local titleRow = addTableRow(tbl)

	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')
			: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

	addTableRow(tbl)
		:tag('td')
			:addClass('navbox-abovebelow')
			:addClass(args.aboveclass)
			:cssText(args.basestyle)
			:cssText(args.abovestyle)
			:attr('colspan', getAboveBelowColspan())
			:tag('div')
				:wikitext(processItem(args.above, args.nowrapitems))
end

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

	addTableRow(tbl)
		: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 = addTableRow(tbl)

	if index == 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(processItem(args.imageleft))
	end

	if args['group' .. listnum] then
		local groupCell = row:tag('th')

		groupCell
			:attr('scope', 'row')
			:addClass('navbox-group')
			:addClass(args.groupclass)
			:cssText(args.basestyle)

		if args.groupwidth then
			groupCell:css('width', args.groupwidth)
		end

		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)
		: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('navbox-image')
				:addClass(args.imageclass)
				:css('width', '0%')
				:css('padding', '0px 0px 0px 2px')
				:cssText(args.imagestyle)
				:attr('rowspan', 2 * #listnums - 1)
				: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'}) do
		if tostring(args[key]):find('background', 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
	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
		tbl
			:addClass('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

	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)
		if args.title then
			nav:attr('aria-labelledby', mw.uri.anchorEncode(args.title))
		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')
			:cssText(args.bodystyle)
			:cssText(args.style)
			:css('padding', '3px')
			:node(tbl)
		if args.title then
			nav:attr('aria-labelledby', mw.uri.anchorEncode(args.title))
		else
			nav:attr('aria-label', 'Navbox')
		end
	end

	renderTrackingCategories(res)

	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