blob: 693e5eb30c81217834c9f4b39338cae315b82dc6 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; Plain ASCII chess display
;;
;; $Revision$
(require 'chess-display)
;;; Code:
(defgroup chess-plain nil
"A minimal, customizable ASCII display."
:group 'chess-display)
(defcustom chess-plain-draw-border nil
"*Non-nil if a border should be drawn (using `chess-plain-border-chars')."
:group 'chess-plain
:type 'boolean)
(defcustom chess-plain-border-chars '(?+ ?- ?+ ?| ?| ?+ ?- ?+)
"*Characters used to draw borders."
:group 'chess-plain
:type '(list character character character character
character character character character))
(defcustom chess-plain-black-square-char ?.
"*Character used to indicate black squares."
:group 'chess-plain
:type 'character)
(defcustom chess-plain-white-square-char ?.
"*Character used to indicate white squares."
:group 'chess-plain
:type 'character)
(defcustom chess-plain-piece-chars
'((?K . ?K)
(?Q . ?Q)
(?R . ?R)
(?B . ?B)
(?N . ?N)
(?P . ?P)
(?k . ?k)
(?q . ?q)
(?r . ?r)
(?b . ?b)
(?n . ?n)
(?p . ?p))
"*Alist of pieces and their corresponding characters."
:group 'chess-plain
:type '(alist :key-type character :value-type character))
(defcustom chess-plain-upcase-indicates 'color
"*Defines what a upcase char should indicate.
The default is 'color, meaning a upcase char is a white piece, a
lowercase char a black piece. Possible values: 'color (default),
'square-color. If set to 'square-color, a uppercase character
indicates a piece on a black square. (Note that you also need to
modify `chess-plain-piece-chars' to avoid real confusion.)"
:group 'chess-plain
:type '(choice (const 'color) (const 'square-color)))
;; fails somehow
(defcustom chess-plain-popup-function 'chess-display-popup-in-window
"The function used to popup a chess-plain display."
:type 'function
:group 'chess-plain)
;;; Code:
(defun chess-plain-handler (event &rest args)
(cond
((eq event 'initialize) t)
((eq event 'popup)
(if chess-display-popup
(funcall chess-plain-popup-function)))
((eq event 'draw)
(apply 'chess-plain-draw args))
((eq event 'highlight)
(apply 'chess-plain-highlight args))))
(defun chess-plain-draw (position perspective)
"Draw the given POSITION from PERSPECTIVE's point of view.
PERSPECTIVE is t for white or nil for black."
(let ((inhibit-redisplay t)
(pos (point)))
(erase-buffer)
(let* ((inverted (not perspective))
(rank (if inverted 7 0))
(file (if inverted 7 0))
beg)
(if chess-plain-draw-border
(insert ? (nth 0 chess-plain-border-chars)
(make-string 8 (nth 1 chess-plain-border-chars))
(nth 2 chess-plain-border-chars) ?\n))
(while (if inverted (>= rank 0) (< rank 8))
(if chess-plain-draw-border
(insert (number-to-string (- 8 rank))
(nth 3 chess-plain-border-chars)))
(while (if inverted (>= file 0) (< file 8))
(let ((piece (chess-pos-piece position
(chess-rf-to-index rank file)))
(white-square (evenp (+ file rank)))
(begin (point)))
(insert (if (eq piece ? )
(if white-square
chess-plain-white-square-char
chess-plain-black-square-char)
(let ((what chess-plain-upcase-indicates)
(pchar (cdr (assq piece chess-plain-piece-chars))))
(cond
((eq what 'square-color)
(if white-square
(downcase pchar)
(upcase pchar)))
(t pchar)))))
(add-text-properties begin (point)
(list 'chess-coord
(chess-rf-to-index rank file))))
(setq file (if inverted (1- file) (1+ file))))
(if chess-plain-draw-border
(insert (nth 4 chess-plain-border-chars)))
(insert ?\n)
(setq file (if inverted 7 0)
rank (if inverted (1- rank) (1+ rank))))
(if chess-plain-draw-border
(insert ? (nth 5 chess-plain-border-chars)
(make-string 8 (nth 6 chess-plain-border-chars))
(nth 7 chess-plain-border-chars) ?\n
? ? (if (not inverted) "abcdefgh" "hgfedcba")))
(set-buffer-modified-p nil)
(goto-char pos))))
(defun chess-plain-highlight (index &optional mode)
(let ((inverted (not (chess-display-perspective nil))))
(save-excursion
(beginning-of-line)
(let ((rank (chess-index-rank index))
(file (chess-index-file index)))
(if inverted
(setq rank (- 7 rank)
file (- 7 file)))
(goto-line (if chess-plain-draw-border
(+ 2 rank)
(1+ rank)))
(forward-char (if chess-plain-draw-border
(1+ file)
file)))
(put-text-property (point) (1+ (point)) 'face
(cond
((eq mode :selected)
'chess-plain-highlight-face)
(t
(chess-display-get-face mode)))))))
(provide 'chess-plain)
;;; chess-plain.el ends here
|
