Module:Gallery Explained

-- This module implements

local p =

local templatestyles = 'Module:Gallery/styles.css'local yesno = require('Module:Yesno')

local function trim(s) return mw.ustring.gsub(mw.ustring.gsub(s, '%s', ' '), '^%s*(.-)%s*$', '%1')end

local tracking, preview

local function checkarg(k,v) if k and type(k)

'string' then if k

'align' or k

'state' or k

'style' or k

'title' or k

'width' or k

'height' or k

'whitebg' or k

'mode' or k

'footer' or k

'perrow' or k

'noborder' or k:match('^alt%d+$') or k:match('^%d+$') then -- valid elseif k

'captionstyle' then if not v:match('^text%-align%s*:%s*center[;%s]*$') then table.insert(tracking, '') end else -- invalid local vlen = mw.ustring.len(k) k = mw.ustring.sub(k, 1, (vlen < 25) and vlen or 25) k = mw.ustring.gsub(k, '[^%w%-_ ]', '?') table.insert(tracking, '') table.insert(preview, '"' .. k .. '"') end endend

function p.gallery(frame) -- If called via #invoke, use the args passed into the invoking template. -- Otherwise, for testing purposes, assume args are being passed directly in. local origArgs = (type(frame.getParent)

'function') and frame:getParent.args or frame -- ParserFunctions considers the empty string to be false, so to preserve the previous -- behavior of, change any empty arguments to nil, so Lua will consider -- them false too. local args = tracking, preview =, for k, v in pairs(origArgs) do if v ~= then args[k] = v checkarg(k,v) end end if (args.mode or )

'packed' and (args.align or )

then args.align = 'center' end

local tbl = mw.html.create('div') tbl:addClass('mod-gallery') if args.state then tbl :addClass('mod-gallery-collapsible') :addClass('collapsible') :addClass(args.state) end if args.style then tbl:cssText(args.style) else tbl:addClass('mod-gallery-default') end if args.align then tbl:addClass('mod-gallery-' .. args.align:lower) end

if args.title then tbl:tag('div') :addClass('title') :tag('div') :wikitext(args.title) end local gargs = gargs['class'] = 'nochecker' .. (args.noborder and or ' bordered-images') gargs['widths'] = tonumber(args.width) or 180 gargs['heights'] = tonumber(args.height) or 180 gargs['style'] = args.captionstyle gargs['perrow'] = args.perrow gargs['mode'] = args.mode if yesno(args.whitebg or 'yes') then gargs['class'] = gargs['class'] .. ' whitebg' end local gallery = local imageCount = math.ceil(#args / 2)

for i = 1, imageCount do local img = trim(args[i*2 - 1] or ) local caption = trim(args[i*2] or ) local alt = trim(args['alt' .. i] or ) if img ~= then table.insert(gallery, img .. (alt ~= and ('|alt=' .. alt) or ) .. '|' .. caption) end end tbl:tag('div') :addClass('main') :tag('div') :wikitext(frame:extensionTag ) if args.footer then tbl:tag('div') :addClass('footer') :tag('div') :wikitext(args.footer) end

local trackstr = (#tracking > 0) and table.concat(tracking, ) or if #preview > 0 then trackstr = require('Module:If preview')._warning .. trackstr end return frame:extensionTag .. tostring(tbl) .. trackstrend

return p