/usr/share/emacs/site-lisp/wl/wl/wl-demo.el is in wl 2.14.0-12.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 | ;;; wl-demo.el --- Opening demo on Wanderlust
;; Copyright (C) 1998,1999,2000,2001,2002,2003,2004
;; Yuuichi Teranishi <teranisi@gohome.org>
;; Copyright (C) 2000,2001,2004
;; Katsumi Yamaoka <yamaoka@jpl.org>
;; Author: Yuuichi Teranishi <teranisi@gohome.org>
;; Katsumi Yamaoka <yamaoka@jpl.org>
;; Keywords: mail, net news
;; This file is part of Wanderlust (Yet Another Message Interface on Emacsen).
;; This program 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 2, or (at your option)
;; any later version.
;; This program 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; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;;; Code:
(defconst wl-demo-copyright-notice
"Copyright (C) 1998-2005 Yuuichi Teranishi <teranisi@gohome.org>"
"A declaration of the copyright on Wanderlust.")
(eval-when-compile
(require 'cl))
(require 'path-util)
(require 'wl-vars)
(require 'wl-version)
(require 'wl-highlight)
(defun wl-demo-icon-name ()
"A function to determine logo file name."
(catch 'found
(dolist (pair wl-demo-icon-name-alist)
(when (eval (car pair))
(throw 'found (eval (cdr pair)))))))
(defvar wl-logo-ascii "\
o$ oo$$$$$$ooo
oo$$$ o$$ o$$$\"\"\"\"\"\"$$$$$o
$$$$$$\" o$$$\" o$\"\" \"$$$
$$\" o$\"\" o$\" $$$
$\" oo$\" $\" $$$
o$ oo\"\"$$ $ $$
o$$ oo$\" \"$$$o $ o$$
$$$$\"\" \"$$oo$ o o$\"
\"$$o \"$$$o oooo$\"\"
$$ \"\"\"\"
Wanderlust
\"$
Yet Another Message Interface On Emacsen"
"Ascii picture used to splash the startup screen.")
(eval-and-compile
(when wl-on-emacs21
;; `display-images-p' has not been available in Emacs versions
;; prior to Emacs 21.0.105.
(defalias-maybe 'display-images-p 'display-graphic-p)))
;; Avoid byte compile warnings.
(eval-when-compile
(autoload 'bitmap-insert-xbm-file "bitmap" nil t)
(autoload 'create-image "image")
(autoload 'device-on-window-system-p "device")
(autoload 'image-type-available-p "image")
(autoload 'insert-image "image")
(autoload 'make-glyph "glyphs")
(autoload 'set-glyph-face "glyphs")
(autoload 'set-specifier "specifier")
(defalias-maybe 'face-background-name 'ignore)
(defalias-maybe 'frame-char-height 'ignore)
(defalias-maybe 'frame-char-width 'ignore)
(defalias-maybe 'glyph-height 'ignore)
(defalias-maybe 'glyph-width 'ignore)
(defalias-maybe 'image-size 'ignore)
(defalias-maybe 'make-extent 'ignore)
(defalias-maybe 'propertize 'ignore)
(defalias-maybe 'set-extent-end-glyph 'ignore)
(defalias-maybe 'window-pixel-height 'ignore)
(defalias-maybe 'window-pixel-width 'ignore))
(defvar wl-demo-bitmap-mule-available-p 'unknown
"Internal variable to say whether the BITMAP-MULE package is available.")
(defun wl-demo-image-type-alist ()
"Return an alist of available logo image types on the current frame."
(if (or (and (featurep 'xemacs)
(device-on-window-system-p))
window-system)
(let ((xpm
(when (or (and (featurep 'xemacs)
(featurep 'xpm))
(and wl-on-emacs21
(display-images-p)
(image-type-available-p 'xpm)))
'("xpm" . xpm)))
(xbm
(when (or (featurep 'xemacs)
(and wl-on-emacs21
(display-images-p)
(image-type-available-p 'xbm))
(eq t wl-demo-bitmap-mule-available-p)
(and (eq 'unknown wl-demo-bitmap-mule-available-p)
(module-installed-p 'bitmap)
(setq wl-demo-bitmap-mule-available-p t)))
'("xbm" . xbm)))
(bitmap
(when (and (not (featurep 'xemacs))
(or (eq t wl-demo-bitmap-mule-available-p)
(and (eq 'unknown wl-demo-bitmap-mule-available-p)
(module-installed-p 'bitmap)
(setq wl-demo-bitmap-mule-available-p t))))
'("bitmap" . bitmap))))
(if (and wl-on-emacs21
(image-type-available-p 'xbm))
;; Prefer xbm rather than bitmap on Emacs 21.
(delq nil (list xpm xbm bitmap '("ascii")))
(delq nil (list xpm bitmap xbm '("ascii")))))
'(("ascii"))))
(defun wl-demo-image-filter (file type)
"Get filtered image data.
FILE is the image file name.
TYPE is the filter function."
(let ((filter (catch 'found
(dolist (pair wl-demo-image-filter-alist)
(when (eq (car pair) type)
(throw 'found (cdr pair)))))))
(with-temp-buffer
(set-buffer-multibyte nil)
(insert-file-contents file)
(goto-char (point-min))
(when filter
(funcall filter))
(buffer-string))))
(defun wl-demo-insert-image (image-type)
"Insert a logo image at the point and position it to be centered.
IMAGE-TYPE specifies what a type of image should be displayed.
Return a number of lines that an image occupies in the buffer."
(let ((file (cond ((eq 'xpm image-type)
(concat (wl-demo-icon-name) ".xpm"))
((eq 'bitmap image-type)
(concat (wl-demo-icon-name) ".img"))
((eq 'xbm image-type)
(concat (wl-demo-icon-name) ".xbm"))))
image width height)
(when (featurep 'xemacs)
(when (boundp 'default-gutter-visible-p)
(set-specifier (symbol-value 'default-gutter-visible-p)
nil (current-buffer)))
(when (featurep 'scrollbar)
(set-specifier (symbol-value 'scrollbar-height) 0 (current-buffer))
(set-specifier (symbol-value 'scrollbar-width) 0 (current-buffer))))
(if (and file
(if (and wl-icon-directory
(file-directory-p wl-icon-directory))
(setq file (expand-file-name file wl-icon-directory))
(message "You have to specify the value of `wl-icon-directory'")
nil)
(if (file-exists-p file)
(if (file-readable-p file)
t
(message "Permission denied: %s" file)
nil)
(message "File not found: %s" file)
nil))
(progn
(cond ((featurep 'xemacs)
(setq width (window-pixel-width)
height (window-pixel-height)
image (make-glyph
(if (eq image-type 'xbm)
(vector image-type ':file file)
(vector image-type ':data
(wl-demo-image-filter
file image-type)))))
(when (eq 'xbm image-type)
(set-glyph-face image 'wl-highlight-logo-face))
(insert-char ?\ (max 0 (/ (+ (* (- width (glyph-width image))
(window-width)) width)
(* 2 width))))
(set-extent-end-glyph (make-extent (point) (point)) image)
(insert "\n")
(/ (+ (* 2 (glyph-height image) (window-height)) height)
(* 2 height)))
((and wl-on-emacs21
(or (eq 'xpm image-type)
(and (eq 'xbm image-type)
(image-type-available-p 'xbm))))
;; Use the new redisplay engine on Emacs 21.
(setq image (create-image (wl-demo-image-filter file
image-type)
image-type t)
width (image-size image)
height (cdr width)
width (car width))
(when (eq 'xbm image-type)
(let ((bg (face-background 'wl-highlight-demo-face))
(fg (face-foreground 'wl-highlight-logo-face)))
(when (stringp bg)
(plist-put (cdr image) ':background bg))
(when (stringp fg)
(plist-put (cdr image) ':foreground fg))))
(insert (propertize " " 'display
(list 'space ':align-to
(max 0 (round (- (window-width)
width)
2)))))
(insert-image image)
(insert "\n")
(round height))
((eq 'bitmap image-type)
;; Use ready-composed bitmap image.
(require 'bitmap)
(let ((coding-system-for-read 'iso-2022-7bit)
(input-coding-system '*iso-2022-jp*))
(insert-file-contents file))
(goto-char (point-max))
(unless (bolp)
(insert "\n"))
;; Emacs 21.x may fail on computing the end of the
;; column if there're bitmap characters.
;;(setq width 0)
;;(while (progn
;; (end-of-line 0)
;; (not (bobp)))
;; (setq width (max width (current-column))))
(setq width 1024)
(while (progn
(end-of-line 0)
(not (bobp)))
(setq width (min width (current-column))))
;; Emacs 21.1 would fail to decode composite chars
;; if it has been built without fixing coding.c.
(when (and wl-on-emacs21
(>= width 80))
(erase-buffer)
(let ((coding-system-for-read 'raw-text))
(insert-file-contents file))
(goto-char (point-max))
(unless (bolp)
(insert "\n"))
(setq width 0)
(while (progn
(end-of-line 0)
(not (bobp)))
;; Decode bitmap data line by line.
(decode-coding-region (line-beginning-position)
(point)
'iso-2022-7bit)
(setq width (max width (current-column)))))
(indent-rigidly (point-min) (point-max)
(max 0 (/ (1+ (- (window-width) width)) 2)))
(put-text-property (point-min) (point-max) 'fixed-width t)
(count-lines (point-min) (goto-char (point-max))))
((eq 'xbm image-type)
(message "Composing a bitmap image...")
(require 'bitmap)
(bitmap-insert-xbm-file file)
(backward-char)
(indent-rigidly (point-min) (point-max)
(max 0 (/ (1+ (- (window-width)
(current-column)))
2)))
(put-text-property (point-min) (point-max) 'fixed-width t)
(message "Composing a bitmap image...done")
(count-lines (point-min) (goto-char (point-max))))))
(insert wl-logo-ascii)
(unless (bolp)
(insert "\n"))
(setq width 0)
(while (progn
(end-of-line 0)
(not (bobp)))
(setq width (max width (current-column))))
(indent-rigidly (point-min) (point-max)
(max 0 (/ (1+ (- (window-width) width)) 2)))
(put-text-property (point-min) (point-max) 'fixed-width t)
(count-lines (point-min) (goto-char (point-max))))))
(defun wl-demo-setup-properties ()
"Set up properties of the demo buffer."
(cond
(wl-on-emacs21
;; I think there should be a better way to set face background
;; for the buffer only. But I don't know how to do it on Emacs21.
(goto-char (point-max))
(dotimes (i (- (window-height)
(count-lines (point-min) (point))))
(insert ?\n))
(let* ((fg (face-foreground 'wl-highlight-demo-face))
(bg (face-background 'wl-highlight-demo-face))
(oblique (nconc '(variable-pitch :slant oblique)
(when (stringp bg)
(list ':background bg))
(when (stringp fg)
(list ':foreground fg))))
(start (text-property-any (point-min) (point-max) 'fixed-width t))
end)
(if start
(progn
(put-text-property (point-min) start 'face oblique)
(setq end (or (text-property-not-all start (point-max)
'fixed-width t)
(point-max)))
(put-text-property start end 'face
(nconc '(wl-highlight-logo-face)
(when (stringp bg)
(list ':background bg))))
(put-text-property end (point-max) 'face oblique))
(put-text-property (point-min) (point-max) 'face oblique))))
((and (featurep 'xemacs)
(face-background-name 'wl-highlight-demo-face))
(set-face-background 'default
(face-background-name 'wl-highlight-demo-face)
(current-buffer)))
(t
(goto-char (point-max))
(dotimes (i (- (window-height)
(count-lines (point-min) (point))))
(insert ?\n))
(let ((start (text-property-any (point-min) (point-max) 'fixed-width t))
end)
(if start
(progn
(put-text-property (point-min) start 'face 'wl-highlight-demo-face)
(setq end (or (text-property-not-all start (point-max)
'fixed-width t)
(point-max)))
(put-text-property start end 'face 'wl-highlight-logo-face)
(put-text-property end (point-max) 'face 'wl-highlight-demo-face))
(put-text-property (point-min) (point-max)
'face 'wl-highlight-demo-face))))))
(defun wl-demo-insert-text (height)
"Insert a version and the copyright message after a logo image. HEIGHT
should be a number of lines that an image occupies in the buffer."
(let* ((height (- (window-height) height 1))
(text (format (cond ((<= height 2)
"version %s - \"%s\"\n%s\n")
((eq height 3)
"version %s - \"%s\"\n\n%s\n")
(t
"\nversion %s - \"%s\"\n\n%s\n"))
(product-version-string (product-find 'wl-version))
(product-code-name (product-find 'wl-version))
wl-demo-copyright-notice))
start)
(goto-char (point-min))
(insert-char ?\n (max 0 (/ (- height 4) 2)))
(setq start (goto-char (point-max)))
(insert text)
(let ((fill-column (window-width)))
(center-region start (point)))))
(defun wl-demo (&optional image-type)
"Demo on the startup screen. IMAGE-TYPE should be a symbol which
overrides the variable `wl-demo-display-logo'. It will prompt user
for the type of image when it is called interactively with a prefix
argument."
(interactive "P")
(let ((selection (wl-demo-image-type-alist))
type)
(if (and image-type (interactive-p))
(setq type (completing-read "Image type: " selection nil t)
image-type (when (assoc type selection)
(cdr (assoc type selection))))
(if (setq type (assoc (format "%s" (or image-type wl-demo-display-logo))
selection))
(setq image-type (cdr type))
(setq image-type (when wl-demo-display-logo
(cdr (car selection)))))))
(let ((buffer (let ((default-enable-multibyte-characters t)
(default-mc-flag t)
(default-line-spacing 0))
(get-buffer-create "*WL Demo*"))))
(switch-to-buffer buffer)
(setq buffer-read-only nil)
(buffer-disable-undo)
(erase-buffer)
(setq truncate-lines t
tab-width 8)
(set (make-local-variable 'tab-stop-list)
'(8 16 24 32 40 48 56 64 72 80 88 96 104 112 120))
(wl-demo-insert-text (wl-demo-insert-image image-type))
(wl-demo-setup-properties)
(set-buffer-modified-p nil)
(goto-char (point-min))
(sit-for (if (featurep 'lisp-float-type)
(/ (float 5) (float 10))
1))
buffer))
(require 'product)
(product-provide (provide 'wl-demo) (require 'wl-version))
;;; wl-demo.el ends here
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