-;;; gnus-fun.el --- various frivoluos extension functions to Gnus
-;; Copyright (C) 2002 Free Software Foundation, Inc.
+;;; gnus-fun.el --- various frivolous extension functions to Gnus
+
+;; Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; Keywords: news
;; 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)
+;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; 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.
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
;;; Commentary:
;;; Code:
+;; For Emacs < 22.2.
+(eval-and-compile
+ (unless (fboundp 'declare-function) (defmacro declare-function (&rest r))))
+
+(eval-when-compile
+ (require 'cl))
+
+(require 'mm-util)
+(require 'gnus-ems)
+(require 'gnus-util)
+(require 'gnus)
+
+(defvar gnus-face-properties-alist)
+
(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"
+(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 2>/dev/null | pnmscale -width 48 -height 48 | ppmtopgm | pgmtopbm | pbmtoxbm | compface"
- "Command for converting a GIF to an X-Face."
+(defcustom gnus-convert-image-to-x-face-command
+ "convert -scale 48x48! %s xbm:- | xbm2xface.pl"
+ "Command for converting an image to an X-Face.
+The command must take a image filename (use \"%s\") as input.
+The output must be the Face header data on stdout in PNG format.
+
+By default it takes a GIF filename and output the X-Face header data
+on stdout."
+ :version "22.1"
:group 'gnus-fun
- :type 'string)
+ :type '(choice (const :tag "giftopnm, netpbm (GIF input only)"
+ "giftopnm %s | ppmnorm | pnmscale -width 48 -height 48 | ppmtopgm | pgmtopbm | pbmtoxbm | compface")
+ (const :tag "convert"
+ "convert -scale 48x48! %s xbm:- | xbm2xface.pl")
+ (string)))
+
+(defcustom gnus-convert-image-to-face-command
+ "convert -scale 48x48! %s -colors %d png:-"
+ "Command for converting an image to a Face.
+
+The command must take an image filename (first format argument
+\"%s\") and the number of colors (second format argument: \"%d\")
+as input. The output must be the Face header data on stdout in
+PNG format."
+ :version "22.1"
+ :group 'gnus-fun
+ :type '(choice (const :tag "djpeg, netpbm (JPG input only)"
+ "djpeg %s | ppmnorm | pnmscale -width 48 -height 48 | ppmquant %d | pnmtopng")
+ (const :tag "convert"
+ "convert -scale 48x48! %s -colors %d png:-")
+ (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 ()
- "Insert a random X-Face header from `gnus-x-face-directory'."
+ "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
- (shell-command-to-string
- (format gnus-convert-pbm-to-x-face-command file))))))
+ (gnus-shell-command-to-string
+ (format gnus-convert-pbm-to-x-face-command
+ (shell-quote-argument file)))))))
+
+(autoload 'message-goto-eoh "message" nil t)
+
+;;;###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:" )
+ "Insert an X-Face header based on an image file.
+
+Depending on `gnus-convert-image-to-x-face-command' it may accept
+different input formats."
+ (interactive "fImage file name: ")
(when (file-exists-p file)
- (shell-command-to-string
- (format gnus-convert-image-to-x-face-command file))))
-
-(defun gnus-convert-image-to-gray-x-face (file depth)
- (let* ((mapfile (make-temp-name (expand-file-name "gnus." mm-tmp-directory)))
- (levels (expt 2 depth))
- (step (/ 255 (1- levels)))
- color-alist bits bits-list mask pixel x-faces)
- (with-temp-file mapfile
- (insert "P3\n")
- (insert (format "%d 1\n" levels))
- (insert "255\n")
- (dotimes (i levels)
- (insert (format "%d %d %d\n"
- (* step i) (* step i) (* step i)))
- (push (cons (* step i) i) color-alist)))
- (when (file-exists-p file)
- (with-temp-buffer
- (insert (shell-command-to-string (format "giftopnm '%s' | ppmnorm 2>/dev/null | pnmscale -width 48 -height 48 | ppmquant -fs -map %s 2>/dev/null | ppmtopgm | pnmnoraw"
- file mapfile)))
- (goto-char (point-min))
- (forward-line 3)
- (while (setq pixel (ignore-errors (read (current-buffer))))
- (push (cdr (assq pixel color-alist)) bits-list))
- (setq bits-list (nreverse bits-list))
- (dotimes (bit-number depth)
- (setq mask (expt 2 bit-number))
- (with-temp-buffer
- (insert "P1\n48 48\n")
- (dolist (bits bits-list)
- (insert (if (zerop (logand bits mask)) "0 " "1 ")))
- (shell-command-on-region
- (point-min) (point-max)
- "pbmtoxbm | compface"
- (current-buffer) t)
- (push (buffer-string) x-faces))))
- (dotimes (i (length x-faces))
- (insert (if (zerop i) "X-Face:" (format "X-Face-%s:" i))
- (nth i x-faces))))
- (delete-file mapfile)))
+ (gnus-shell-command-to-string
+ (format gnus-convert-image-to-x-face-command
+ (shell-quote-argument (expand-file-name file))))))
;;;###autoload
-(defun gnus-convert-gray-x-face-to-xpm (faces)
- (let* ((depth (length faces))
- (scale (/ 255 (1- (expt 2 depth))))
- bit-list bit-lists pixels pixel)
- (dolist (face faces)
- (with-temp-buffer
- (insert face)
- (shell-command-on-region
- (point-min) (point-max)
- "uncompface -X | xbmtopbm | pnmnoraw"
- (current-buffer) t)
- (goto-char (point-min))
- (forward-line 2)
- (while (not (eobp))
- (cond
- ((eq (following-char) ?0)
- (push 0 bit-list))
- ((eq (following-char) ?1)
- (push 1 bit-list)))
- (forward-char 1)))
- (push bit-list bit-lists))
- (dotimes (i (* 48 48))
- (setq pixel 0)
- (dotimes (plane depth)
- (setq pixel (+ (* pixel 2) (nth i (nth plane bit-lists)))))
- (push pixel pixels))
- (with-temp-buffer
- (insert "P2\n48 48\n255\n")
- (dolist (pixel pixels)
- (insert (number-to-string (* scale pixel)) " "))
- (shell-command-on-region
- (point-min) (point-max)
- "ppmtoxpm 2>/dev/null"
- (current-buffer) t)
- (buffer-string))))
+(defun gnus-face-from-file (file)
+ "Return a Face header based on an image file.
+
+Depending on `gnus-convert-image-to-face-command' it may accept
+different input formats."
+ (interactive "fImage file name: ")
+ (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 (if (< quant 10) 1 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-gray-x-face-region (beg end)
- "Convert the X-Faces in region to a PPM file."
- (interactive "r")
- (let ((input (buffer-substring beg end))
- faces)
- (with-temp-buffer
- (insert input)
- (goto-char (point-min))
- (while (not (eobp))
+(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)
+
+(declare-function article-narrow-to-head "gnus-art" ())
+(declare-function gnus-article-goto-header "gnus-art" (header))
+(declare-function gnus-add-image "gnus-art" (category image))
+(declare-function gnus-add-wash-type "gnus-art" (type))
+
+(defun gnus-display-x-face-in-from (data)
+ "Display the X-Face DATA in the From header."
+ (require 'gnus-art)
+ (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
- (mail-header-narrow-to-field)
- (push (mail-header-field-value) faces)
- (goto-char (point-max)))))
- (gnus-convert-gray-x-face-to-xpm faces)))
+ (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)
+ (apply 'gnus-create-image (concat "X-Face: " data) 'xface t
+ (cdr (assq 'xface gnus-face-properties-alist)))
+ (apply 'gnus-create-image pbm 'pbm t
+ (cdr (assq 'pbm gnus-face-properties-alist))))
+ 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
projects / gnus / blobdiff