# Module:Photo montage

-- implements template:photomontage
local p = {}  
local function isnotempty(s)
return s and s:match( '^%s*(.-)%s*$' ) ~= ''
end  
local function photomontage
local tracking = ''
local args = :getParent.args
local size = tonumber(args['size'] or '200') or 200
local = tonumber(args[''] or '1') or 1
local spacing = tonumber(args['spacing'] or '1') or 1
local color = args['color'] or 'black'
local color_border = args['color_border'] or 'black'
local position = (args['position'] or ''):lower
local caption = args['text'] or ''
local text_background = isnotempty(args['text_background']) and args['text_background'] or '#F8F8FF'
local foot_montage = args['foot_montage'] or ''
local lastnum = nil
local rownum = nil
local floatstyle = nil
if( position == * or position == * or position == '') then
float .. position
tracking = tracking .. ''
else
float
end
if isnotempty(foot_montage) then
local div = mw.html.create('div')
div:css('font-size', '95%')
:wikitext(foot_montage)
foot_montage = '\n' .. tostring(div)
end  
local lettertonumber = {
a = '01', b = '02', c = '03', d = '04', e = '05', f = '06', g = '07',
h = '08', i = '09', j = '10', k = '11', l = '12', m = '13', n = '14',
o = '15', p = '16', q = '17', r = '18', s = '19', t = '20', u = '21',
v = '22', w = '23', x = '26', y = '27', z = '28' }
local letters = {
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'
}  
-- find all the nonempty photo numbers
local photos = {}
local photocount = 0
for k, v in pairs( args ) do
local i = tonumber(tostring(k):match( '^%s*photo([%d]+)[a-z]%s*$' ) or '0')
if( i > 0 and isnotempty(v) ) then
local c = lettertonumber[tostring(k):match( '^%s*photo[%d]+([a-z])%s*$' )]
table.insert( photos, tonumber(i .. '.' .. c ) )
photocount = photocount + 1
end
end
-- sort the photo numbers
table.sort(photos)  
-- compute the number of the photos in each row
local count = {}
lastnum = -1
rownum = 0
for k=1,photocount do
local num = math.floor(photos[k])
if(num == lastnum) then
count[rownum] = count[rownum] + 1
else
rownum = rownum + 1
count[rownum] = 1
end
lastnum = num
end  
if(photocount > 0) then
-- start table
root = mw.html.create('div')
root
:css('background-color', color)
:css('-collapse', 'collapse')
:css('', .. 'px solid ' .. color_border)
:css('width', size .. 'px')
:css('display', 'table')
:cssText(floatstyle)
local innercell = root
:tag('div'):css('display', 'table-row')
:tag('div'):css('display', 'table-cell')
:css('-top', 0)
:css('padding', spacing .. 'px 0 0 ' .. spacing .. 'px')  
-- loop over the photos
lastnum = -1
rownum = 0
local row
for k=1,photocount do
local num = math.floor(photos[k])
local c = letters[math.floor(0.5 + 100*(photos[k] - num))]
if(num ~= lastnum) then
rownum = rownum + 1
row = innercell
:tag('div'):css('display', 'table')
:css('background-color', color)
:css('-collapse', 'collapse')
:tag('div'):css('display', 'table-row')
end
local altstr = (args['alt' .. num .. c] or *) ~= * and
'|alt=' .. args['alt' .. num .. c] or ''
local image = string.format( '',
args['photo' .. num .. c], altstr,
(size - spacing*(count[rownum] - 1))/count[rownum] )
row
:tag('div'):css('display', 'table-cell')
:css('-top', 0)
:css('padding', '0 ' .. spacing .. 'px ' .. spacing .. 'px ' .. '0')
:wikitext(image)
lastnum = num
end
if isnotempty(caption) then
root
:tag('div'):css('display', 'table-row')
:tag('div'):css('display', 'table-cell')
:addClass('thumbcaption')
:css('background-color', text_background)
:css('font-size', '95%')
:wikitext(caption)
end
-- end table
end
if photocount < 2 then
tracking = tracking .. ''
end
return tostring(root or '') .. foot_montage .. tracking
end  
function p.montage
return photomontage
end  
return p