Fontem paginae Modulus:Imago multiplex inspicere

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-- implements [[template:multiple image]]
local p = {}

local autoscaledimages
local nonautoscaledimages

local function isnotempty(s)
	return s and s:match( '^%s*(.-)%s*$' ) ~= ''
end

local function removepx(s)
	return tostring(s or ''):match('^(.*)[Pp][Xx]%s*$') or s
end

local function getdimensions(s, w, h)
	if tonumber(w) and tonumber(h) then
		nonautoscaledimages = true
		return tonumber(w), tonumber(h)
	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, height = 0}
	w = tonumber(file.width) or 0
	h = tonumber(file.height) or 0
	autoscaledimages = true
	return w, h
end

local function renderImageCell(image, width, height, link, alt, thumbtime, caption, textalign, istyle)
	local root = mw.html.create('')

	local altstr = '|alt=' .. (alt or '')
	local linkstr = link and ('|link=' .. link) or ''
	local widthstr = '|' .. tostring(width) .. 'px'
	local thumbtimestr = ''

	if isnotempty( thumbtime ) then
		thumbtimestr = '|thumbtime=' .. thumbtime
	end

	local imagediv = root:tag('div')
	imagediv:addClass('thumbimage')
	imagediv:cssText(istyle)
	if( height ) then
		imagediv:css('height', tostring(height) .. 'px')
		imagediv:css('overflow', 'hidden')
	end
	imagediv:wikitext('[[file:' .. image .. widthstr .. linkstr .. altstr .. thumbtimestr .. ']]')
	if isnotempty(caption) then
		local captiondiv = root:tag('div')
		captiondiv:addClass('thumbcaption')
		if isnotempty(textalign) then
			captiondiv:addClass('text-align-' .. textalign)
		end
		captiondiv:wikitext(caption)
	end
	return tostring(root)
end

local function getWidth(w1, w2)
	local w
	if isnotempty(w1) then
		w = tonumber(w1)
	elseif isnotempty(w2) then
		w = tonumber(w2)
	end
	return w or 200
end

local function getPerRow(pstr, ic)
	-- split string into array using any non-digit as a dilimiter
	local pr = mw.text.split(pstr or '', '[^%d][^%d]*')
	-- if split failed, assume a single row
	if (#pr < 1) then
		pr = {tostring(ic)}
	end
	-- convert the array of strings to an array of numbers,
	-- adding any implied/missing numbers at the end of the array
	local r = 1
	local thisrow = tonumber(pr[1] or ic) or ic
	local prownum = {}
	while( ic > 0 ) do
		prownum[r] = thisrow
		ic = ic - thisrow
		r = r + 1
		-- use the previous if the next is missing and
		-- make sure we don't overstep the number of images
		thisrow = math.min(tonumber(pr[r] or thisrow) or ic, ic)
	end
	return prownum
end

local function renderMultipleImages(frame)
	local pargs = frame:getParent().args
	local args = frame.args
	local width = removepx(pargs['width'] or '')
	local dir = pargs['direction'] or ''
	local border = pargs['border'] or args['border'] or ''
	local align = pargs['align'] or args['align'] or (border == 'infobox' and 'center' or '')
	local capalign = pargs['caption_align'] or args['caption_align'] or ''
	local totalwidth = removepx(pargs['total_width'] or args['total_width'] or '')
	local imgstyle = pargs['image_style'] or args['image_style']
	local header = pargs['header'] or pargs['title'] or ''
	local footer = pargs['footer'] or ''
	local imagegap = tonumber(pargs['image_gap'] or '1') or 1
	local perrow = nil
	local thumbclass = {
		["left"] = 'tleft',
		["none"] = 'tnone',
		["center"] = 'tnone',
		["centre"] = 'tnone',
		["right"] = 'tright'
		}

	-- find all the nonempty images
	local imagenumbers = {}
	local imagecount = 0
	for k, v in pairs( pargs ) do
		local i = tonumber(tostring(k):match( '^%s*image([%d]+)%s*$' ) or '0')
		if( i > 0 and isnotempty(v) ) then
			table.insert( imagenumbers, i)
			imagecount = imagecount + 1
		end
	end

	-- sort the imagenumbers
	table.sort(imagenumbers)

	-- create an array with the number of images per row
	perrow = getPerRow(dir == 'vertical' and '1' or pargs['perrow'], imagecount)

	-- compute the number of rows
	local rowcount = #perrow

	-- store the image widths and compute row widths and maximum row width
	local heights = {}
	local widths = {}
	local widthmax = 0
	local widthsum = {}
	local k = 0
	for r=1,rowcount do
		widthsum[r] = 0
		for c=1,perrow[r] do
			k = k + 1
			if( k <= imagecount ) then
				local i = imagenumbers[k]
				if( isnotempty(totalwidth) ) then
					widths[k], heights[k] = getdimensions(pargs['image' .. i], pargs['width' .. i], pargs['height' .. i])
				else
					widths[k] = getWidth(width, pargs['width' .. i])
				end
				widthsum[r] = widthsum[r] + widths[k]
			end
		end
		widthmax = math.max(widthmax, widthsum[r])
	end

	-- make sure the gap is non-negative
	if imagegap < 0 then imagegap = 0 end

	-- if total_width has been specified, rescale the image widths
	if( isnotempty(totalwidth) ) then
		totalwidth = tonumber(totalwidth)
		widthmax = 0
		local k = 0
		for r=1,rowcount do
			local koffset = k
			local tw = totalwidth - (3 + imagegap) * (perrow[r] - 1) - 12
			local ar = {}
			local arsum = 0
			for j=1,perrow[r] do
				k = k + 1
				if( k<= imagecount ) then
					local i = imagenumbers[k]
					local h = heights[k] or 0
					if (h > 0) then
						ar[j] = widths[k]/h
						heights[k] = h
					else
						ar[j] = widths[k]/100
					end
					arsum = arsum + ar[j]
				end
			end
			local ht = tw/arsum
			local ws = 0
			k = koffset
			for j=1,perrow[r] do
				k = k + 1
				if( k<= imagecount ) then
					local i = imagenumbers[k]
					widths[k] = math.floor(ar[j]*ht + 0.5)
					ws = ws + widths[k]
					if heights[k] then
						heights[k] = math.floor(ht)
					end
				end
			end
			widthsum[r] = ws
			widthmax = math.max(widthmax, widthsum[r])
		end
	end

	-- start building the array of images, if there are images
	if( imagecount > 0 ) then
		-- compute width of outer div
		local bodywidth = 0
		for r=1,rowcount do
			if( widthmax == widthsum[r] ) then
				bodywidth = widthmax + (3 + imagegap) * (perrow[r] - 1) + 12
			end
		end
		-- The body has a min-width of 100, which needs to be taken into account on specific widths
		bodywidth = math.max( 100, bodywidth - 8);

		local bg = pargs['background color'] or ''
		-- create the array of images
		local root = mw.html.create('div')
		root:addClass('thumb')
		root:addClass('tmulti')
		-- root:addClass('tmulti-sandbox')
		root:addClass(thumbclass[align] or 'tright')

		if( align == 'center' or align == 'centre' ) then
			root:addClass('center')
		end
		if( bg ~= '' ) then
			root:css('background-color', bg)
		end

		local div = root:tag('div')
		div:addClass('thumbinner')
		div:css('width', tostring(bodywidth) .. 'px')
			:css('max-width', tostring(bodywidth) .. 'px')
		if( bg ~= '' ) then
			div:css('background-color', bg)
		end
		if( border == 'infobox' or border == 'none') then
			div:css('border', 'none')
		end
		-- add the header
		if( isnotempty(header) ) then
			div:tag('div')
				:addClass('trow')
				:tag('div')
					:addClass('theader')
					:css('text-align', pargs['header_align'])
					:css('background-color', pargs['header_background'])
					:wikitext(header)
		end
		-- loop through the images
		local k = 0
		for r=1,rowcount do
			local rowdiv = div:tag('div'):addClass('trow');
			for j=1,perrow[r] do
				k = k + 1
				if( k <= imagecount ) then
					local imagediv = rowdiv:tag('div')
					imagediv:addClass('tsingle')
					if bg ~= '' then
						imagediv:css('background-color', bg);
					end
					if ((imagegap > 1) and (j < perrow[r])) then
						imagediv:css('margin-right', tostring(imagegap) .. 'px')
					end
					local i = imagenumbers[k]
					local img = pargs['image' .. i]
					local w = widths[k]
					imagediv:css('width', tostring(2 + w) .. 'px')
						:css('max-width', tostring(2 + w) .. 'px')
					imagediv:wikitext(renderImageCell(img, w, heights[k],
						pargs['link' .. i], pargs['alt' .. i],
						pargs['thumbtime' .. i], pargs['caption' .. i], capalign, imgstyle))
				end
			end
		end
		-- add the footer
		if( isnotempty(footer) ) then
			local falign = string.lower(pargs['footer_align'] or args['footer_align'] or 'left')
			falign = (falign == 'centre') and 'center' or falign
			div:tag('div')
				:addClass('trow')
				:css('display', (falign ~= 'left') and 'flow-root' or 'flex')
				:tag('div')
					:addClass('thumbcaption')
					:css('text-align', (falign ~= 'left') and falign or nil)
					:css('background-color', pargs['footer_background'])
					:wikitext(footer)
		end
		return tostring(root)
	end
	return ''
end

function p.render( frame )
	autoscaledimages = false
	nonautoscaledimages = false

	return frame:extensionTag {name = 'templatestyles', args = {src = 'Imago multiplex/styles.css', wrapper = ".tmulti"}}
		.. renderMultipleImages( frame )
		--.. (autoscaledimages and '[[Category:Pages using multiple image with auto scaled images]]' or '')
		--.. (nonautoscaledimages and '[[Category:Pages using multiple image with manual scaled images]]' or '')
end

return p
Formula hac in pagina adhibita:
Modulus:Imago multiplex/doc (recensere)
Redire ad Modulus:Imago multiplex.
Receptum de "https://la.wikipedia.org/wiki/Modulus:Imago_multiplex"