local p = {}
function chessboard(args, size, rows, cols, rev, letters, numbers, header, footer, align, clear)
function colchar( col ) return ( "abcdefghijklmnopqrstuvwxyz" ):sub( col, col ) end
function image_square( pc, row, col, size )
local colornames = { l = 'white', d = 'black' }
local piecenames = { p = 'pawn', r = 'rook', n = 'knight', b = 'bishop', q = 'queen', k = 'king', a = 'archbishop',
c = 'chancelor', z = 'champion', w = 'wizard', t = 'fool', h = 'upside-down pawn', m = 'upside-down rook',
s = 'upside-down knight', f = 'upside-down king', e = 'upside-down bishop', g = 'upside-down queen'}
local symnames = { xx = 'black cross', ox = 'white cross', xo = 'black circle', oo = 'white circle',
ul = 'up-left arrow', ua = 'up arrow', ur = 'up-right arrow', la = 'left arrow', ra = 'right arrow',
dl = 'down-left arrow', da = 'down arrow', dr = 'down-right arrow', lr = 'left-right arrow', ud = 'up-down arrow',
x0='zero', x1='one', x2='two', x3='three', x4='four', x5='five', x6='six', x7='seven', x8='eight', x9='nine'}
local color = mw.ustring.gsub(pc,'^.*(%w)(%w).*$', '%2') or ''
local piece = mw.ustring.gsub(pc,'^.*(%w)(%w).*$', '%1') or ''
local alt = colchar(col) .. row .. ' '
if (colornames[color] and piecenames[piece]) then
alt = alt .. colornames[color] .. ' ' .. piecenames[piece]
else
alt = alt .. (symnames[ piece .. color ] or (piece .. ' ' .. color))
end
local ld = (((row + col) % 2) == 0) and 'd' or 'l'
return string.format('[[File:Chess %s%s%s45.svg|%dx%dpx|alt=%s|%s]]', piece, color, ld, size, size, alt, alt)
end
function letters_row( rev, num_lt, num_rt, cols )
local res = '<tr style="vertical-align:middle">'
if ( num_lt ) then
res = res .. '<td></td>'
end
res = res .. '<td style="height:18px">'
for k = 1, cols do
res = res .. colchar(rev and (cols - k + 1) or k) .. '</td><td>'
end
res = res .. '</td>'
if ( num_rt ) then
res= res .. '<td></td>'
end
res = res .. '</tr>'
return res
end
local letters_tp = (letters:match('both') or letters:match('top'))
local letters_bt = (letters:match('both') or letters:match('bottom'))
local numbers_lt = (numbers:match('both') or numbers:match('left'))
local numbers_rt = (numbers:match('both') or numbers:match('right'))
local width = 8*size + 6
if ( numbers_lt ) then width = width + 18 end
if ( numbers_rt ) then width = width + 18 end
local b = ''
local caption = ''
if ( letters_tp ) then b = b .. letters_row(rev, numbers_lt, numbers_rt, cols) .. '\n' end
for trow = 1,rows do
local row = rev and trow or (rows - trow + 1)
b = b .. '<tr style="vertical-align:middle">'
if ( numbers_lt ) then b = b .. '<td style="width:18px">' .. row .. '</td>' end
for tcol = 1,cols do
local col = rev and (cols - tcol + 1) or tcol
local idx = cols*(rows - row) + col + 2
if (args[idx] == nil) then args[idx] = ' ' end
local img = image_square(args[idx]:match('%w%w') or '', row, col, size )
b = b .. '<td>' .. img .. '</td>'
end
if ( numbers_rt ) then b = b .. '<td style="width:18px">' .. row .. '</td>' end
end
if ( letters_bt ) then b = b .. letters_row(rev, numbers_lt, numbers_rt, cols) .. '\n' end
if footer:match('^%s*$')
then
else
caption = '<div class="thumbcaption" style="margin-left:4px;margin-right:4px;">' .. footer .. '</div>\n'
end
return '<div class="thumb ' .. align .. '" style="clear:' .. clear .. '; width:' .. width .. 'px; text-align:center">'
.. header .. '\n<div class="thumbinner" style="width:', 'px; text-align:center">\n'
.. '<table cellpadding=0 cellspacing=0 style="background:white; font-size:88%; border:1px #b0b0b0 solid; padding:0; '
.. 'margin:2px auto;">\n' .. b .. '\n</table>\n' .. caption .. '</div></div>'
end
function convertFenToArgs( fen )
-- converts FEN notation to an array of positions, offset by 2
local res = {' ', ' '}
-- Loop over rows, which are delimited by /
for srow in string.gmatch("/" .. fen, "/%w+") do
-- Loop over all letters and numbers in the row
for piece in srow:gmatch( "%w" ) do
if (piece:match("%d"))
then -- if a digit
for k=1,piece do
table.insert(res,' ')
end
else -- not a digit
local color = piece:match( '%u' ) and 'l' or 'd'
piece = piece:lower()
table.insert(res, piece .. color )
end
end
end
return res
end
function p.board(frame)
local args = frame.args
local pargs = frame:getParent().args
local size = (args.size or pargs.size) or '26px'
local reverse = ( (args.reverse or pargs.reverse) or '' ):lower() == "true"
local rows = (args.rows or pargs.rows) or 8
local cols = (args.cols or pargs.cols) or 8
local letters = (args.letters or pargs.letters or 'both'):lower()
local numbers = (args.numbers or pargs.numbers or 'both'):lower()
local header = (args[2] or pargs[2]) or ''
local footer = (args[3 + rows*cols] or pargs[3 + rows*cols]) or ''
local align = ((args[1] or pargs[1]) or 'tright'):lower()
local clear = (args.clear or pargs.clear) or ( align:match('tright') and 'right' or 'none')
local fen = args.fen or pargs.fen
size = mw.ustring.match(size, '%d[%d]*') or '26' -- remove px from size
if (fen) then
align = (args.align or pargs.align) or 'tright'
header = (args.header or pargs.header) or ''
footer = (args.footer or pargs.footer) or ''
return chessboard(convertFenToArgs( fen ), size, rows, cols, reverse, letters, numbers, header, footer, align, clear)
else
if args[3] then
return chessboard(args, size, rows, cols, reverse, letters, numbers, header, footer, align, clear)
else
return chessboard(pargs, size, rows, cols, reverse, letters, numbers, header, footer, align, clear)
end
end
end
return p
