[Emacs-diffs] Changes to emacs/lisp/gnus/gnus-fun.el [gnus-5_10-branch]

[Andreas Schwab]

Index: emacs/lisp/gnus/gnus-fun.el
diff -c /dev/null emacs/lisp/gnus/gnus-fun.el:1.1.2.1
*** /dev/null   Thu Jul 22 16:46:17 2004
--- emacs/lisp/gnus/gnus-fun.el Thu Jul 22 16:45:47 2004
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*** 0 ****
--- 1,252 ----
+ ;;; gnus-fun.el --- various frivolous extension functions to Gnus
+ ;; Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+ 
+ ;; Author: Lars Magne Ingebrigtsen <address@hidden>
+ ;; 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))
+ 
+ (defcustom gnus-x-face-directory (expand-file-name "x-faces" gnus-directory)
+   "*Directory where X-Face PBM files are stored."
+   :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."
+   :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."
+   :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."
+   :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