Module:Chessboard: Difference between revisions

Revision as of 16:20, 3 March 2013

Revision as of 18:18, 5 March 2013

Line 3:

local colornames = { l = 'White', d = 'Black' }

function rowchar( row ) return 89 - row end

function filechar( file ) return ( "abcdefgh" ):sub( file + 1, file + 1 ) end

function coord( ind ) return ( reverse and ( 78 - ind ) * size ) or ( ind - 1 ) * size end

function piecediv( piece, row, file, res )

function rowchar() return 8 - row end

function filechar() return ( "abcdefgh" ):sub( file + 1, file + 1 ) end

function coord( ind ) return ( reverse and ( 7 - ind ) * size ) or ind * size end

local color = piece:match( '%u' ) and 'l' or 'd'

piece = piece:lower()

local alt = string.format("%s%s %s %s", filechar( file ), rowchar( row ), colornames[color], piecenames[piece] or piece)

local img = string.format('[[File:Chess %s%st45.svg|%dx%dpx|alt=%s|%s]]', piece, color, size, size, alt, alt)

table.insert( res, string.format('<div style="position:absolute;z-index:3;top:%dpx;left:%dpx;">%s</div>', coord( row ), coord( file ), img) )

return 1

end

function oneRow( s, row, res )

local file = 01

for piece in s:gmatch( "%w" ) do -- if a digit, increment "file" by the digit. else, add the piece _and_ increment file by 1

file = file + ( piece:match("%d") or piecediv( piece, row, file, res ) or 1 )

end

end

local result = {}

local s8 = size * 8

table.insert(result, string.format([=[

<div class="chess-fen" style="position:relative;">

[[File:Chessboard480.png|%dx%dpx|link=]]

]=], s8size * 8, s8size * 8))

local row = 0

for srow in string.gmatch("/" .. fen, "/%w+") do

oneRow(srow, row, result)

row = row + 1

oneRow(srow, row, result)

end

table.insert(result, '</div>')