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Diffstat (limited to 'lisp/gnus/gnus-fun.el')
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diff --git a/lisp/gnus/gnus-fun.el b/lisp/gnus/gnus-fun.el new file mode 100644 index 00000000000..21a5b1c55b4 --- /dev/null +++ b/lisp/gnus/gnus-fun.el @@ -0,0 +1,252 @@ +;;; 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)) + +(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 |