[bpt/emacs.git] / lisp / gnus / gnus-fun.el

;;; gnus-fun.el --- various frivolous extension functions to Gnus
;; Copyright (C) 2002, 2003 Free Software Foundation, Inc.

;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; Keywords: news

;; 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 2, 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; 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:

(eval-when-compile
  (require 'cl))

(require 'mm-util)
(require 'gnus-ems)
(require 'gnus-util)

(defcustom gnus-x-face-directory (expand-file-name "x-faces" gnus-directory)
  "*Directory where X-Face PBM files are stored."
  :version "22.1"
  :group 'gnus-fun
  :type 'directory)

(defcustom gnus-convert-pbm-to-x-face-command "pbmtoxbm %s | compface"
  "Command for converting a PBM to an X-Face."
  :version "22.1"
  :group 'gnus-fun
  :type 'string)

(defcustom gnus-convert-image-to-x-face-command "giftopnm %s | ppmnorm | pnmscale -width 48 -height 48 | ppmtopgm | pgmtopbm | pbmtoxbm | compface"
  "Command for converting an image to an X-Face.
By default it takes a GIF filename and output the X-Face header data
on stdout."
  :version "22.1"
  :group 'gnus-fun
  :type 'string)

(defcustom gnus-convert-image-to-face-command "djpeg %s | ppmnorm | pnmscale -width 48 -height 48 | ppmquant %d | pnmtopng"
  "Command for converting an image to an Face.
By default it takes a JPEG filename and output the Face header data
on stdout."
  :version "22.1"
  :group 'gnus-fun
  :type 'string)

(defun gnus-shell-command-to-string (command)
  "Like `shell-command-to-string' except not mingling ERROR."
  (with-output-to-string
    (call-process shell-file-name nil (list standard-output nil)
		  nil shell-command-switch command)))

(defun gnus-shell-command-on-region (start end command)
  "A simplified `shell-command-on-region'.
Output to the current buffer, replace text, and don't mingle error."
  (call-process-region start end shell-file-name t
		       (list (current-buffer) nil)
		       nil shell-command-switch command))

;;;###autoload
(defun gnus-random-x-face ()
  "Return X-Face header data chosen randomly from `gnus-x-face-directory'."
  (interactive)
  (when (file-exists-p gnus-x-face-directory)
    (let* ((files (directory-files gnus-x-face-directory t "\\.pbm$"))
	   (file (nth (random (length files)) files)))
      (when file
	(gnus-shell-command-to-string
	 (format gnus-convert-pbm-to-x-face-command
		 (shell-quote-argument file)))))))

;;;###autoload
(defun gnus-insert-random-x-face-header ()
  "Insert a random X-Face header from `gnus-x-face-directory'."
  (interactive)
  (let ((data (gnus-random-x-face)))
    (save-excursion
      (message-goto-eoh)
      (if data
	  (insert "X-Face: " data)
	(message
	 "No face returned by `gnus-random-x-face'.  Does %s/*.pbm exist?"
	 gnus-x-face-directory)))))

;;;###autoload
(defun gnus-x-face-from-file (file)
  "Insert an X-Face header based on an image file."
  (interactive "fImage file name (by default GIF): ")
  (when (file-exists-p file)
    (gnus-shell-command-to-string
     (format gnus-convert-image-to-x-face-command
	     (shell-quote-argument (expand-file-name file))))))

;;;###autoload
(defun gnus-face-from-file (file)
  "Return an Face header based on an image file."
  (interactive "fImage file name (by default JPEG): ")
  (when (file-exists-p file)
    (let ((done nil)
	  (attempt "")
	  (quant 16))
      (while (and (not done)
		  (> quant 1))
	(setq attempt
	      (let ((coding-system-for-read 'binary))
		(gnus-shell-command-to-string
		 (format gnus-convert-image-to-face-command
			 (shell-quote-argument (expand-file-name file))
			 quant))))
	(if (> (length attempt) 726)
	    (progn
	      (setq quant (- quant 2))
	      (gnus-message 9 "Length %d; trying quant %d"
			    (length attempt) quant))
	  (setq done t)))
      (if done
	  (mm-with-unibyte-buffer
	    (insert attempt)
	    (gnus-face-encode))
	nil))))

(defun gnus-face-encode ()
  (let ((step 72))
    (base64-encode-region (point-min) (point-max))
    (goto-char (point-min))
    (while (search-forward "\n" nil t)
      (replace-match ""))
    (goto-char (point-min))
    (while (> (- (point-max) (point))
	      step)
      (forward-char step)
      (insert "\n ")
      (setq step 76))
    (buffer-string)))

;;;###autoload
(defun gnus-convert-face-to-png (face)
  "Convert FACE (which is base64-encoded) to a PNG.
The PNG is returned as a string."
  (mm-with-unibyte-buffer
    (insert face)
    (ignore-errors
      (base64-decode-region (point-min) (point-max)))
    (buffer-string)))

;;;###autoload
(defun gnus-convert-png-to-face (file)
  "Convert FILE to a Face.
FILE should be a PNG file that's 48x48 and smaller than or equal to
726 bytes."
  (mm-with-unibyte-buffer
    (insert-file-contents file)
    (when (> (buffer-size) 726)
      (error "The file is %d bytes long, which is too long"
	     (buffer-size)))
    (gnus-face-encode)))

(defface gnus-x-face '((t (:foreground "black" :background "white")))
  "Face to show X-Face.
The colors from this face are used as the foreground and background
colors of the displayed X-Faces."
  :group 'gnus-article-headers)

(defun gnus-display-x-face-in-from (data)
  "Display the X-Face DATA in the From header."
  (let ((default-enable-multibyte-characters nil)
	pbm)
    (when (or (gnus-image-type-available-p 'xface)
	      (and (gnus-image-type-available-p 'pbm)
		   (setq pbm (uncompface data))))
      (save-excursion
	(save-restriction
	  (article-narrow-to-head)
	  (gnus-article-goto-header "from")
	  (when (bobp)
	    (insert "From: [no `from' set]\n")
	    (forward-char -17))
	  (gnus-add-image
	   'xface
	   (gnus-put-image
	    (if (gnus-image-type-available-p 'xface)
		(gnus-create-image
		 (concat "X-Face: " data)
		 'xface t :face 'gnus-x-face)
	      (gnus-create-image
	       pbm 'pbm t :face 'gnus-x-face)) nil 'xface))
	  (gnus-add-wash-type 'xface))))))

(defun gnus-grab-cam-x-face ()
  "Grab a picture off the camera and make it into an X-Face."
  (interactive)
  (shell-command "xawtv-remote snap ppm")
  (let ((file nil))
    (while (null (setq file (directory-files "/tftpboot/sparky/tmp"
					     t "snap.*ppm")))
      (sleep-for 1))
    (setq file (car file))
    (with-temp-buffer
      (shell-command
       (format "pnmcut -left 110 -top 30 -width 144 -height 144 '%s' | ppmnorm 2>/dev/null | pnmscale -width 48 | ppmtopgm | pgmtopbm -threshold -value 0.92 | pbmtoxbm | compface"
	       file)
       (current-buffer))
      ;;(sleep-for 3)
      (delete-file file)
      (buffer-string))))

(defun gnus-grab-cam-face ()
  "Grab a picture off the camera and make it into an X-Face."
  (interactive)
  (shell-command "xawtv-remote snap ppm")
  (let ((file nil)
	result)
    (while (null (setq file (directory-files "/tftpboot/sparky/tmp"
					     t "snap.*ppm")))
      (sleep-for 1))
    (setq file (car file))
    (shell-command
     (format "pnmcut -left 110 -top 30 -width 144 -height 144 '%s' | pnmscale -width 48 -height 48 | ppmtopgm > /tmp/gnus.face.ppm"
	     file))
    (let ((gnus-convert-image-to-face-command
	   (format "cat '%%s' | ppmquant %%d | ppmchange %s | pnmtopng"
		   (gnus-fun-ppm-change-string))))
      (setq result (gnus-face-from-file "/tmp/gnus.face.ppm")))
    (delete-file file)
    ;;(delete-file "/tmp/gnus.face.ppm")
    result))

(defun gnus-fun-ppm-change-string ()
  (let* ((possibilites '("%02x0000" "00%02x00" "0000%02x"
			"%02x%02x00" "00%02x%02x" "%02x00%02x"))
	 (format (concat "'#%02x%02x%02x' '#"
			 (nth (random 6) possibilites)
			 "'"))
	 (values nil))
  (dotimes (i 255)
    (push (format format i i i i i i)
	  values))
  (mapconcat 'identity values " ")))

(provide 'gnus-fun)

;;; arch-tag: 9d000a69-15cc-4491-9dc0-4627484f50c1
;;; gnus-fun.el ends here
Commit	Line	Data
23f87bed MB	1	;;; gnus-fun.el --- various frivolous extension functions to Gnus
	2	;; Copyright (C) 2002, 2003 Free Software Foundation, Inc.
	3
	4	;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
	5	;; Keywords: news
	6
	7	;; This file is part of GNU Emacs.
	8
	9	;; GNU Emacs is free software; you can redistribute it and/or modify
	10	;; it under the terms of the GNU General Public License as published by
	11	;; the Free Software Foundation; either version 2, or (at your option)
	12	;; any later version.
	13
	14	;; GNU Emacs is distributed in the hope that it will be useful,
	15	;; but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	17	;; GNU General Public License for more details.
	18
	19	;; You should have received a copy of the GNU General Public License
	20	;; along with GNU Emacs; see the file COPYING. If not, write to the
	21	;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	22	;; Boston, MA 02111-1307, USA.
	23
	24	;;; Commentary:
	25
	26	;;; Code:
	27
	28	(eval-when-compile
c1d7d285 MB	29	(require 'cl))
	30
	31	(require 'mm-util)
	32	(require 'gnus-ems)
	33	(require 'gnus-util)
23f87bed MB	34
	35	(defcustom gnus-x-face-directory (expand-file-name "x-faces" gnus-directory)
	36	"*Directory where X-Face PBM files are stored."
bf247b6e	37	:version "22.1"
23f87bed MB	38	:group 'gnus-fun
	39	:type 'directory)
	40
	41	(defcustom gnus-convert-pbm-to-x-face-command "pbmtoxbm %s \| compface"
	42	"Command for converting a PBM to an X-Face."
bf247b6e	43	:version "22.1"
23f87bed MB	44	:group 'gnus-fun
	45	:type 'string)
	46
	47	(defcustom gnus-convert-image-to-x-face-command "giftopnm %s \| ppmnorm \| pnmscale -width 48 -height 48 \| ppmtopgm \| pgmtopbm \| pbmtoxbm \| compface"
	48	"Command for converting an image to an X-Face.
	49	By default it takes a GIF filename and output the X-Face header data
	50	on stdout."
bf247b6e	51	:version "22.1"
23f87bed MB	52	:group 'gnus-fun
	53	:type 'string)
	54
	55	(defcustom gnus-convert-image-to-face-command "djpeg %s \| ppmnorm \| pnmscale -width 48 -height 48 \| ppmquant %d \| pnmtopng"
	56	"Command for converting an image to an Face.
	57	By default it takes a JPEG filename and output the Face header data
	58	on stdout."
bf247b6e	59	:version "22.1"
23f87bed MB	60	:group 'gnus-fun
	61	:type 'string)
	62
	63	(defun gnus-shell-command-to-string (command)
	64	"Like `shell-command-to-string' except not mingling ERROR."
	65	(with-output-to-string
	66	(call-process shell-file-name nil (list standard-output nil)
	67	nil shell-command-switch command)))
	68
	69	(defun gnus-shell-command-on-region (start end command)
	70	"A simplified `shell-command-on-region'.
	71	Output to the current buffer, replace text, and don't mingle error."
	72	(call-process-region start end shell-file-name t
	73	(list (current-buffer) nil)
	74	nil shell-command-switch command))
	75
	76	;;;###autoload
	77	(defun gnus-random-x-face ()
	78	"Return X-Face header data chosen randomly from `gnus-x-face-directory'."
	79	(interactive)
	80	(when (file-exists-p gnus-x-face-directory)
	81	(let* ((files (directory-files gnus-x-face-directory t "\\.pbm$"))
	82	(file (nth (random (length files)) files)))
	83	(when file
	84	(gnus-shell-command-to-string
	85	(format gnus-convert-pbm-to-x-face-command
	86	(shell-quote-argument file)))))))
	87
	88	;;;###autoload
	89	(defun gnus-insert-random-x-face-header ()
	90	"Insert a random X-Face header from `gnus-x-face-directory'."
	91	(interactive)
	92	(let ((data (gnus-random-x-face)))
	93	(save-excursion
	94	(message-goto-eoh)
	95	(if data
	96	(insert "X-Face: " data)
	97	(message
	98	"No face returned by `gnus-random-x-face'. Does %s/*.pbm exist?"
	99	gnus-x-face-directory)))))
	100
	101	;;;###autoload
	102	(defun gnus-x-face-from-file (file)
	103	"Insert an X-Face header based on an image file."
	104	(interactive "fImage file name (by default GIF): ")
	105	(when (file-exists-p file)
	106	(gnus-shell-command-to-string
	107	(format gnus-convert-image-to-x-face-command
	108	(shell-quote-argument (expand-file-name file))))))
	109
	110	;;;###autoload
	111	(defun gnus-face-from-file (file)
	112	"Return an Face header based on an image file."
	113	(interactive "fImage file name (by default JPEG): ")
	114	(when (file-exists-p file)
	115	(let ((done nil)
	116	(attempt "")
	117	(quant 16))
	118	(while (and (not done)
	119	(> quant 1))
	120	(setq attempt
	121	(let ((coding-system-for-read 'binary))
	122	(gnus-shell-command-to-string
	123	(format gnus-convert-image-to-face-command
124	(shell-quote-argument (expand-file-name file))
125	quant))))
126	(if (> (length attempt) 726)
127	(progn
128	(setq quant (- quant 2))
129	(gnus-message 9 "Length %d; trying quant %d"
130	(length attempt) quant))
131	(setq done t)))
132	(if done
133	(mm-with-unibyte-buffer
134	(insert attempt)
135	(gnus-face-encode))
136	nil))))
137
138	(defun gnus-face-encode ()
139	(let ((step 72))
140	(base64-encode-region (point-min) (point-max))
141	(goto-char (point-min))
142	(while (search-forward "\n" nil t)
143	(replace-match ""))
144	(goto-char (point-min))
145	(while (> (- (point-max) (point))
146	step)
147	(forward-char step)
148	(insert "\n ")
149	(setq step 76))
150	(buffer-string)))
151
152	;;;###autoload
153	(defun gnus-convert-face-to-png (face)
154	"Convert FACE (which is base64-encoded) to a PNG.
155	The PNG is returned as a string."
156	(mm-with-unibyte-buffer
157	(insert face)
158	(ignore-errors
159	(base64-decode-region (point-min) (point-max)))
160	(buffer-string)))
161
162	;;;###autoload
163	(defun gnus-convert-png-to-face (file)
164	"Convert FILE to a Face.
165	FILE should be a PNG file that's 48x48 and smaller than or equal to
166	726 bytes."
167	(mm-with-unibyte-buffer
168	(insert-file-contents file)
169	(when (> (buffer-size) 726)
170	(error "The file is %d bytes long, which is too long"
171	(buffer-size)))
172	(gnus-face-encode)))
173
174	(defface gnus-x-face '((t (:foreground "black" :background "white")))
175	"Face to show X-Face.
176	The colors from this face are used as the foreground and background
177	colors of the displayed X-Faces."
178	:group 'gnus-article-headers)
179
180	(defun gnus-display-x-face-in-from (data)
181	"Display the X-Face DATA in the From header."
182	(let ((default-enable-multibyte-characters nil)
183	pbm)
184	(when (or (gnus-image-type-available-p 'xface)
185	(and (gnus-image-type-available-p 'pbm)
186	(setq pbm (uncompface data))))
187	(save-excursion
188	(save-restriction
189	(article-narrow-to-head)
190	(gnus-article-goto-header "from")
191	(when (bobp)
192	(insert "From: [no `from' set]\n")
193	(forward-char -17))
194	(gnus-add-image
195	'xface
196	(gnus-put-image
197	(if (gnus-image-type-available-p 'xface)
198	(gnus-create-image
199	(concat "X-Face: " data)
200	'xface t :face 'gnus-x-face)
201	(gnus-create-image
202	pbm 'pbm t :face 'gnus-x-face)) nil 'xface))
203	(gnus-add-wash-type 'xface))))))
204
205	(defun gnus-grab-cam-x-face ()
206	"Grab a picture off the camera and make it into an X-Face."
207	(interactive)
208	(shell-command "xawtv-remote snap ppm")
209	(let ((file nil))
210	(while (null (setq file (directory-files "/tftpboot/sparky/tmp"
211	t "snap.*ppm")))
212	(sleep-for 1))
213	(setq file (car file))
214	(with-temp-buffer
215	(shell-command
216	(format "pnmcut -left 110 -top 30 -width 144 -height 144 '%s' \| ppmnorm 2>/dev/null \| pnmscale -width 48 \| ppmtopgm \| pgmtopbm -threshold -value 0.92 \| pbmtoxbm \| compface"
217	file)
218	(current-buffer))
219	;;(sleep-for 3)
220	(delete-file file)
221	(buffer-string))))
222
223	(defun gnus-grab-cam-face ()
224	"Grab a picture off the camera and make it into an X-Face."
225	(interactive)
226	(shell-command "xawtv-remote snap ppm")
227	(let ((file nil)
228	result)
229	(while (null (setq file (directory-files "/tftpboot/sparky/tmp"
230	t "snap.*ppm")))
231	(sleep-for 1))
232	(setq file (car file))
233	(shell-command
234	(format "pnmcut -left 110 -top 30 -width 144 -height 144 '%s' \| pnmscale -width 48 -height 48 \| ppmtopgm > /tmp/gnus.face.ppm"
235	file))
236	(let ((gnus-convert-image-to-face-command
237	(format "cat '%%s' \| ppmquant %%d \| ppmchange %s \| pnmtopng"
238	(gnus-fun-ppm-change-string))))
239	(setq result (gnus-face-from-file "/tmp/gnus.face.ppm")))
240	(delete-file file)
241	;;(delete-file "/tmp/gnus.face.ppm")
242	result))
243
244	(defun gnus-fun-ppm-change-string ()
245	(let* ((possibilites '("%02x0000" "00%02x00" "0000%02x"
246	"%02x%02x00" "00%02x%02x" "%02x00%02x"))
247	(format (concat "'#%02x%02x%02x' '#"
248	(nth (random 6) possibilites)
249	"'"))
250	(values nil))
251	(dotimes (i 255)
252	(push (format format i i i i i i)
253	values))
254	(mapconcat 'identity values " ")))
255
256	(provide 'gnus-fun)
257
258	;;; arch-tag: 9d000a69-15cc-4491-9dc0-4627484f50c1
259	;;; gnus-fun.el ends here