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| | ;;; gamegrid.el --- library for implementing grid-based games on Emacs
;; Copyright (C) 1997-1998, 2001-2017 Free Software Foundation, Inc.
;; Author: Glynn Clements <glynn@sensei.co.uk>
;; Version: 1.02
;; Created: 1997-08-13
;; Keywords: games
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
;; ;;;;;;;;;;;;; buffer-local variables ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defvar gamegrid-use-glyphs t
"Non-nil means use glyphs when available.")
(defvar gamegrid-use-color t
"Non-nil means use color when available.")
(defvar gamegrid-font "-*-courier-medium-r-*-*-*-140-100-75-*-*-iso8859-*"
"Name of the font used in X mode.")
(defvar gamegrid-face nil
"Indicates the face to use as a default.")
(make-variable-buffer-local 'gamegrid-face)
(defvar gamegrid-display-options nil)
(defvar gamegrid-buffer-width 0)
(defvar gamegrid-buffer-height 0)
(defvar gamegrid-blank 0)
(defvar gamegrid-timer nil)
(defvar gamegrid-display-mode nil)
(defvar gamegrid-display-table)
(defvar gamegrid-face-table nil)
(defvar gamegrid-buffer-start 1)
(defvar gamegrid-score-file-length 50
"Number of high scores to keep.")
(defvar gamegrid-user-score-file-directory
(locate-user-emacs-file "games/")
"A directory for game scores which can't be shared.
If Emacs was built without support for shared game scores, then this
directory will be used.")
(make-variable-buffer-local 'gamegrid-use-glyphs)
(make-variable-buffer-local 'gamegrid-use-color)
(make-variable-buffer-local 'gamegrid-font)
(make-variable-buffer-local 'gamegrid-display-options)
(make-variable-buffer-local 'gamegrid-buffer-width)
(make-variable-buffer-local 'gamegrid-buffer-height)
(make-variable-buffer-local 'gamegrid-blank)
(make-variable-buffer-local 'gamegrid-timer)
(make-variable-buffer-local 'gamegrid-display-mode)
(make-variable-buffer-local 'gamegrid-display-table)
(make-variable-buffer-local 'gamegrid-face-table)
(make-variable-buffer-local 'gamegrid-buffer-start)
(make-variable-buffer-local 'gamegrid-score-file-length)
;; ;;;;;;;;;;;;; global variables ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defvar gamegrid-grid-x-face nil)
(defvar gamegrid-mono-x-face nil)
(defvar gamegrid-mono-tty-face nil)
;; ;;;;;;;;;;;;; constants ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defconst gamegrid-glyph-height 16)
(defconst gamegrid-xpm "\
/* XPM */
static char *noname[] = {
/* width height ncolors chars_per_pixel */
\"16 16 3 1\",
/* colors */
\"+ s col1\",
\". s col2\",
\"- s col3\",
/* pixels */
\"---------------+\",
\"--------------++\",
\"--............++\",
\"--............++\",
\"--............++\",
\"--............++\",
\"--............++\",
\"--............++\",
\"--............++\",
\"--............++\",
\"--............++\",
\"--............++\",
\"--............++\",
\"--............++\",
\"-+++++++++++++++\",
\"++++++++++++++++\"
};
"
"XPM format image used for each square")
(defvar gamegrid-xbm "\
/* gamegrid XBM */
#define gamegrid_width 16
#define gamegrid_height 16
static unsigned char gamegrid_bits[] = {
0xff, 0xff, 0xff, 0x7f, 0xff, 0x3f, 0xaf, 0x0a, 0x57, 0x15, 0xaf, 0x0a,
0x57, 0x15, 0xaf, 0x0a, 0x57, 0x15, 0xaf, 0x0a, 0x57, 0x15, 0xaf, 0x0a,
0x57, 0x15, 0x07, 0x00, 0x03, 0x00, 0x01, 0x00 };"
"XBM format image used for each square.")
;; ;;;;;;;;;;;;;;;; miscellaneous functions ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defsubst gamegrid-characterp (arg)
(if (fboundp 'characterp)
(characterp arg)
(integerp arg)))
(defsubst gamegrid-event-x (event)
(if (fboundp 'event-x)
(event-x event)
(car (posn-col-row (event-end event)))))
(defsubst gamegrid-event-y (event)
(if (fboundp 'event-y)
(event-y event)
(cdr (posn-col-row (event-end event)))))
;; ;;;;;;;;;;;;; display functions ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun gamegrid-color (color shade)
(let* ((v (floor (* shade 255)))
(r (* v (aref color 0)))
(g (* v (aref color 1)))
(b (* v (aref color 2))))
(format "#%02x%02x%02x" r g b)))
(defun gamegrid-set-font (face)
(if gamegrid-font
(condition-case nil
(set-face-font face gamegrid-font)
(error nil))))
(defun gamegrid-setup-face (face color)
(set-face-foreground face color)
(set-face-background face color)
(gamegrid-set-font face)
(condition-case nil
(set-face-background-pixmap face [nothing]);; XEmacs
(error nil))
(condition-case nil
(set-face-background-pixmap face nil);; Emacs
(error nil)))
(defun gamegrid-make-mono-tty-face ()
(let ((face (make-face 'gamegrid-mono-tty-face)))
(set-face-inverse-video face t)
face))
(defun gamegrid-make-color-tty-face (color)
(let* ((color-str (if (symbolp color) (symbol-value color) color))
(name (intern (format "gamegrid-color-tty-face-%s" color-str)))
(face (make-face name)))
(gamegrid-setup-face face color-str)
face))
(defun gamegrid-make-grid-x-face ()
(let ((face (make-face 'gamegrid-x-border-face)))
(gamegrid-set-font face)
face))
(defun gamegrid-make-mono-x-face ()
(let ((face (make-face 'gamegrid-mono-x-face))
(color (face-foreground 'default)))
(if (null color)
(setq color
(cdr-safe (assq 'foreground-color (frame-parameters)))))
(gamegrid-setup-face face color)
face))
(defun gamegrid-make-color-x-face (color)
(let* ((hex (gamegrid-color color 1.0))
(name (intern (format "gamegrid-color-x-face-%s" hex)))
(face (make-face name)))
(gamegrid-setup-face face hex)
face))
(defun gamegrid-make-face (data-spec-list color-spec-list)
(let ((data (gamegrid-match-spec-list data-spec-list))
(color (gamegrid-match-spec-list color-spec-list)))
(pcase data
(`color-x
(gamegrid-make-color-x-face color))
(`grid-x
(unless gamegrid-grid-x-face
(setq gamegrid-grid-x-face (gamegrid-make-grid-x-face)))
gamegrid-grid-x-face)
(`mono-x
(unless gamegrid-mono-x-face
(setq gamegrid-mono-x-face (gamegrid-make-mono-x-face)))
gamegrid-mono-x-face)
(`color-tty
(gamegrid-make-color-tty-face color))
(`mono-tty
(unless gamegrid-mono-tty-face
(setq gamegrid-mono-tty-face (gamegrid-make-mono-tty-face)))
gamegrid-mono-tty-face))))
(defun gamegrid-colorize-glyph (color)
(find-image `((:type xpm :data ,gamegrid-xpm
:ascent center
:color-symbols
(("col1" . ,(gamegrid-color color 0.6))
("col2" . ,(gamegrid-color color 0.8))
("col3" . ,(gamegrid-color color 1.0))))
(:type xbm :data ,gamegrid-xbm
:ascent center
:foreground ,(gamegrid-color color 1.0)
:background ,(gamegrid-color color 0.5)))))
(defun gamegrid-match-spec (spec)
(let ((locale (car spec))
(value (cadr spec)))
(and (or (eq locale t)
(and (listp locale)
(memq gamegrid-display-mode locale))
(and (symbolp locale)
(eq gamegrid-display-mode locale)))
value)))
(defun gamegrid-match-spec-list (spec-list)
(and spec-list
(or (gamegrid-match-spec (car spec-list))
(gamegrid-match-spec-list (cdr spec-list)))))
(defun gamegrid-make-glyph (data-spec-list color-spec-list)
(let ((data (gamegrid-match-spec-list data-spec-list))
(color (gamegrid-match-spec-list color-spec-list)))
(cond ((gamegrid-characterp data)
(vector data))
((eq data 'colorize)
(gamegrid-colorize-glyph color))
((listp data)
(find-image data)) ;untested!
((vectorp data)
(gamegrid-make-image-from-vector data)))))
(defun gamegrid-make-image-from-vector (vect)
"Convert an XEmacs style \"glyph\" to an image-spec."
(let ((l (list 'image :type)))
(dotimes (n (length vect))
(setf l (nconc l (list (aref vect n)))))
(nconc l (list :ascent 'center))))
(defun gamegrid-display-type ()
(cond ((and gamegrid-use-glyphs
(display-images-p))
'glyph)
((and gamegrid-use-color
(display-graphic-p)
(display-color-p))
'color-x)
((display-graphic-p)
'mono-x)
((and gamegrid-use-color
(display-color-p))
'color-tty)
((display-multi-font-p) ;???
'mono-tty)
(t
'emacs-tty)))
(defun gamegrid-set-display-table ()
(if (featurep 'xemacs)
(add-spec-to-specifier current-display-table
gamegrid-display-table
(current-buffer)
nil
'remove-locale)
(setq buffer-display-table gamegrid-display-table)))
(declare-function image-size "image.c" (spec &optional pixels frame))
(defun gamegrid-setup-default-font ()
(setq gamegrid-face
(copy-face 'default
(intern (concat "gamegrid-face-" (buffer-name)))))
(when (eq gamegrid-display-mode 'glyph)
(let ((max-height nil))
(dotimes (c 256)
(let ((glyph (aref gamegrid-display-table c)))
(when (and (listp glyph) (eq (car glyph) 'image))
(let ((height (cdr (image-size glyph))))
(if (or (null max-height)
(< max-height height))
(setq max-height height))))))
(when (and max-height (< max-height 1))
(let ((default-font-height (face-attribute 'default :height))
(resy (/ (display-pixel-height) (/ (display-mm-height) 25.4)))
point-size pixel-size)
(setq point-size (/ (* (float default-font-height) max-height) 10)
pixel-size (floor (* resy (/ point-size 72.27)))
point-size (* (/ pixel-size resy) 72.27))
(face-spec-set gamegrid-face
`((t :height ,(floor (* point-size 10))))))))))
(defun gamegrid-initialize-display ()
(setq gamegrid-display-mode (gamegrid-display-type))
(setq gamegrid-display-table (make-display-table))
(setq gamegrid-face-table (make-vector 256 nil))
(dotimes (c 256)
(let* ((spec (aref gamegrid-display-options c))
(glyph (gamegrid-make-glyph (car spec) (nth 2 spec)))
(face (gamegrid-make-face (cadr spec) (nth 2 spec))))
(aset gamegrid-face-table c face)
(aset gamegrid-display-table c glyph)))
(gamegrid-setup-default-font)
(gamegrid-set-display-table)
(setq cursor-type nil))
(defun gamegrid-set-face (c)
(if (eq gamegrid-display-mode 'glyph)
(add-text-properties (1- (point)) (point)
(list 'display (list (aref gamegrid-display-table c))))
(put-text-property (1- (point))
(point)
'face
(aref gamegrid-face-table c))))
(defun gamegrid-cell-offset (x y)
(+ gamegrid-buffer-start
(* (1+ gamegrid-buffer-width) y)
x))
;; ;;;;;;;;;;;;;;;; grid functions ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun gamegrid-get-cell (x y)
(char-after (gamegrid-cell-offset x y)))
(defun gamegrid-set-cell (x y c)
(save-excursion
(let ((buffer-read-only nil))
(goto-char (gamegrid-cell-offset x y))
(delete-char 1)
(insert-char c 1)
(gamegrid-set-face c))))
(defun gamegrid-init-buffer (width height blank)
(setq gamegrid-buffer-width width
gamegrid-buffer-height height)
(let ((line (concat
(make-string width blank)
"\n"))
(buffer-read-only nil))
(erase-buffer)
(setq gamegrid-buffer-start (point))
(dotimes (i height)
(insert line))
;; Adjust the height of the default face to the height of the
;; images. Unlike XEmacs, Emacs doesn't allow making the default
;; face buffer-local; so we do this with an overlay.
(when (eq gamegrid-display-mode 'glyph)
(overlay-put (make-overlay (point-min) (point-max))
'face gamegrid-face))
(goto-char (point-min))))
(defun gamegrid-init (options)
(setq buffer-read-only t
truncate-lines t
line-spacing 0
gamegrid-display-options options)
(buffer-disable-undo (current-buffer))
(gamegrid-initialize-display))
;; ;;;;;;;;;;;;;;;; timer functions ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun gamegrid-start-timer (period func)
(setq gamegrid-timer
(if (featurep 'xemacs)
(start-itimer "Gamegrid"
func
period
period
nil
t
(current-buffer))
(run-with-timer period
period
func
(current-buffer)))))
(defun gamegrid-set-timer (delay)
(if gamegrid-timer
(if (fboundp 'set-itimer-restart)
(set-itimer-restart gamegrid-timer delay)
(timer-set-time gamegrid-timer
(list (aref gamegrid-timer 1)
(aref gamegrid-timer 2)
(aref gamegrid-timer 3))
delay))))
(defun gamegrid-kill-timer ()
(if gamegrid-timer
(if (featurep 'xemacs)
(delete-itimer gamegrid-timer)
(cancel-timer gamegrid-timer)))
(setq gamegrid-timer nil))
;; ;;;;;;;;;;;;;;; high score functions ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun gamegrid-add-score (file score)
"Add the current score to the high score file.
On POSIX systems Emacs searches for FILE in the directory
specified by `gamegrid-user-score-file-directory' and creates it
there, if necessary.
On non-POSIX systems Emacs searches for FILE in the directory
specified by the variable `temporary-file-directory'. If necessary,
FILE is created there."
(pcase system-type
((or `ms-dos `windows-nt)
(gamegrid-add-score-insecure file score))
(_
(gamegrid-add-score-with-update-game-score file score))))
;; On POSIX systems there are two cases to distinguish:
;; 1. FILE is an absolute filename. Then it should be a file in
;; temporary file directory. This is the way,
;; `gamegrid-add-score' was supposed to be used in the past and
;; is covered here for backward-compatibility.
;;
;; 2. Create/update FILE in the user's home directory.
(defvar gamegrid-shared-game-dir)
(make-obsolete-variable 'gamegrid-shared-game-dir nil "26.1")
(defun gamegrid-add-score-with-update-game-score (file score)
(if (file-name-absolute-p file)
(gamegrid-add-score-insecure file score)
;; Add the score to a score file in the user's home directory.
(unless (file-exists-p
(directory-file-name gamegrid-user-score-file-directory))
(make-directory gamegrid-user-score-file-directory t))
(let ((f (expand-file-name file gamegrid-user-score-file-directory)))
(unless (file-exists-p f)
(write-region "" nil f nil 'silent nil 'excl))
(gamegrid-add-score-insecure f score))))
(defun gamegrid-add-score-with-update-game-score-1 (file target score)
(gamegrid-add-score-with-update-game-score target score))
(make-obsolete 'gamegrid-add-score-with-update-game-score-1
'gamegrid-add-score-with-update-game-score "26.1")
(defun gamegrid-add-score-insecure (file score &optional directory)
(save-excursion
(setq file (expand-file-name file (or directory
temporary-file-directory)))
(find-file-other-window file)
(setq buffer-read-only nil)
(goto-char (point-max))
(insert (format "%05d\t%s\t%s <%s>\n"
score
(current-time-string)
(user-full-name)
(cond ((fboundp 'user-mail-address)
(user-mail-address))
((boundp 'user-mail-address)
user-mail-address)
(t ""))))
(sort-fields 1 (point-min) (point-max))
(reverse-region (point-min) (point-max))
(goto-char (point-min))
(forward-line gamegrid-score-file-length)
(delete-region (point) (point-max))
(setq buffer-read-only t)
(save-buffer)))
;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(provide 'gamegrid)
;;; gamegrid.el ends here
|