Graphical Go Boards

The wiki formatting can easily be extended with new constructions, implemented in Python. Clearly graphical go boards are a useful feature and a proof of concept implementation has been done. It needs significant improvements both in terms of graphics and features. An example is shown here,

That board is entered with this markup,

{{{
#!goban
+------
|....XO
|....XO
|XXXXXO
|OOOOOO
}}}

The Python implementation of the board looks like this (stored in wiki-macros/goban.py),

def execute(hdf, args, env):
    lines = args.splitlines()

    upper_edge = False
    if lines[0].find('-') >= 0:
        upper_edge = True
        lines = lines[1:]

    lower_edge = False
    if lines[-1].find('-') >= 0:
        lower_edge = True
        lines = lines[:-1]

    result = '<br />'

    for k in range(len(lines)):
        row = lines[k]
        for j in range(len(row)):
            s = ''
            if row[j] == '.':
                if k == 0 and upper_edge:
                    if j == 1 and row[0] == '|':
                        s = 'ulc'
                    elif j == len(row) - 2 and row[-1] == '|':
                        s = 'urc'
                    else:
                        s = 'ts'
                elif k == len(lines) - 1 and lower_edge:
                    if j == 1 and row[0] == '|':
                        s = 'llc'
                    elif j == len(row) - 2 and row[-1] == '|':
                        s = 'lrc'
                    else:
                        s = 'bs'
                else:
                    if j == 1 and row[0] == '|':
                        s = 'ls'
                    elif j == len(row) - 2 and row[-1] == '|':
                        s = 'rs'
                    else:
                        s = 'p'
            elif row[j] == 'O' or row[j] == 'o':
                s = 'w'
            elif row[j] == 'X' or row[j] == 'x':
                s = 'b'

            if s != '':
                result += '<img src="/gnugo-images/goban/' + s + '.gif">'
        result += '<br />'

    return  '<P STYLE="line-height: 0px"\n' + result + '\n</P>\n'

Most of the code is involved in creating the names of the images borrowed from www.gongames.com (hosting a Swedish forum about go).