Module:Wide image

-- This module implements [[template:wide image]]
local p = {}

local function getfilename(s)
	s = mw.ustring.gsub(s or '', '^%s*[Ff][Ii][Ll][Ee]%s*:%s*', '')
	s = mw.ustring.gsub(s or '', '^%s*[Ii][Mm][Aa][Gg][Ee]%s*:%s*', '')
	return s
end

local function getwidth(s, w)
	w = mw.ustring.gsub(w or '0', '^%s*(%d+)%s*[Pp][Xx]*%s*$', '%1')
	w = tonumber(w) or 0
	if w > 0 then
		return w
	end
	
	local file = s and mw.title.new('File:' .. mw.uri.decode(mw.ustring.gsub(s,'%|.*$',''), 'WIKI'))
	file = file and file.file or {width = 0}
	w = tonumber(file.width) or 0
	return w
end

local function getimage(s, w, a, c, rtl)
	if c == 'thumb' or c == 'thumbnail' or c == 'frame' or c == 'border' then
		c = s
	elseif rtl and c ~= '' then
		c = '&#x202A;' .. c .. '&#x202C;'
	end
	return '[[File:' .. (s or '') .. '|' .. (w or '') .. '|alt=' .. (a or '') 
		.. '|' .. mw.text.unstrip(c or '') .. ']]'
end

local function getcontainers(noborder, float, width, maxwidth)
	local r = mw.html.create('div')
	if noborder then
		if float == 'left' then
			r:addClass('floatleft')
		elseif float == 'right' then
			r:addClass('floatright')
		elseif float == 'none' then
			r:addClass('floatnone')
		else -- center is default
			r:addClass('floatnone')
		r:css('margin', '0 auto')
			r:css('overflow', 'hidden')
		end
	else
		r:addClass('thumb')
		if float == 'left' then
			r:addClass('tleft')
		elseif float == 'right' then
			r:addClass('tright')
		elseif float == 'none' then
			r:addClass('tnone')
		else -- center is default
			r:addClass('tnone')
			r:css('margin', '0 auto')
			r:css('overflow', 'hidden')
		end
	end
	r:css('width', width)
	r:css('max-width', maxwidth)
	local d = noborder and r or r:tag('div'):addClass('thumbinner')
	
	return r,d
end
	
function wideimage(args)
	if args[1] then
		local image = getfilename(args[1])
		local iwidth = getwidth(image, args[2] or '0')
		local rtl = args['dir'] and args['dir'] == 'rtl' or nil
		local noborder = args['border'] and args['border'] == 'no' or nil
		
		local r,d = getcontainers(noborder, args[5] or '', args[4] or 'auto', noborder and (iwidth .. 'px') or ((iwidth + 8) .. 'px'))
		
		d:tag('div')
			:addClass('noresize')
			:css('overflow', 'auto')
			:css('direction', rtl and 'rtl' or nil)
			:wikitext(getimage(image,args[2],args['alt'],args[3] or '',rtl))
		if args[3] then
			d = d:tag('div')
					:addClass('thumbcaption')
					:css('text-align', args['align-cap'])
			if noborder == nil then
				d:tag('div')
					:addClass('magnify')
					:wikitext('[[:File:' .. image .. '| ]]')
			end
			d:wikitext(args[3])
		end
		return tostring(r)
	end
	return ''
end

function p.main(frame)
	local getArgs = require('Module:Arguments').getArgs
	local args = getArgs(frame)
	return wideimage(args)
end

return p