Module:Multiple image

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

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

local function renderImageCell(image, width, height, link, alt, caption, textalign) local root = mw.html.create('') local altstr = '|alt=' .. (alt or '') local linkstr = link and ('|link=' .. link) or '' local widthstr = '|' .. tostring(width) .. 'px' local imagediv = root:tag('div') imagediv:addClass('thumbimage') if( height ) then imagediv:css('height', tostring(height) .. 'px') imagediv:css('overflow', 'hidden') end imagediv:wikitext('') if isnotempty(caption) then local captiondiv = root:tag('div') captiondiv:addClass('thumbcaption') captiondiv:css('clear', 'left') if isnotempty(textalign) then captiondiv:css('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 = pargs['width'] or '' local dir = pargs['direction'] or '' local align = pargs['align'] or args['align'] or '' local captionalign = pargs['caption_align'] or args['caption_align'] or '' local totalwidth = pargs['total_width'] or args['total_width'] or '' local header = pargs['header'] or pargs['title'] or '' local footer = pargs['footer'] or '' 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 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] widths[k] = getWidth(width, pargs['width' .. i]) widthsum[r] = widthsum[r] + widths[k] end end widthmax = math.max(widthmax, widthsum[r]) end

-- if total_width has been specified, rescale the image widths local heights = {} if( isnotempty(totalwidth) ) then totalwidth = tonumber(totalwidth) widthmax = 0 local k = 0 for r=1,rowcount do			local koffset = k			local tw = totalwidth - 4 * (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 = tonumber( pargs['height' .. i] or '' ) 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 + 4 * (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(thumbclass[align] or 'tright') if( align == 'center' or align == 'centre' ) then root:addClass('center') end if( pargs['margin_top'] or args['margin_top']) then root:css('margin-top', pargs['margin_top'] or args['margin_top']) end if( pargs['margin_bottom'] or args['margin_bottom']) then root:css('margin-bottom', pargs['margin_bottom'] or args['margin_bottom']) 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 -- add the header if( isnotempty(header) ) then div:tag('div') :css('clear', 'both') :css('font-weight', 'bold') :css('text-align', pargs['header_align'] or 'center') :css('background-color', pargs['header_background'] or 'transparent') :wikitext(header) end -- loop through the images local k = 0 for r=1,rowcount do			for j=1,perrow[r] do				k = k + 1 if( k <= imagecount ) then local imagediv = div:tag('div') imagediv:addClass('tsingle') if dir ~= 'vertical' then imagediv:css('float', 'left') end if bg ~= '' then imagediv:css('background-color', bg); end imagediv:css('margin', '1px') 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['caption' .. i], captionalign)) end end -- only float content gives a parent height:0, so add a clearing div if dir ~= 'vertical' then div:tag('div') :css('clear', 'left') end end -- add the footer if( isnotempty(footer) ) then div:tag('div') :addClass('thumbcaption') :css('clear', 'left') :css('text-align', pargs['footer_align'] or args['footer_align'] or 'left') :css('background-color', pargs['footer_background'] or 'transparent') :wikitext(footer) end return tostring(root) end return '' end

function p.render( frame ) return renderMultipleImages( frame ) end return p