Import Gnus subtree

[packages] / xemacs-packages / gnus / lisp / compface.el

diff --git a/xemacs-packages/gnus/lisp/compface.el b/xemacs-packages/gnus/lisp/compface.el
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+;;; compface.el --- functions for converting X-Face headers
+
+;; Copyright (C) 2002-2016 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 3 of the License, 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.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;;; Code:
+
+;;;###
+(defun uncompface (face)
+  "Convert FACE to pbm.
+Requires the external programs `uncompface', and `icontopbm'.  On a
+GNU/Linux system these might be in packages with names like `compface'
+or `faces-xface' and `netpbm' or `libgr-progs', for instance."
+  (with-temp-buffer
+    (unless (featurep 'xemacs) (set-buffer-multibyte nil))
+    (insert face)
+    (let ((coding-system-for-read 'raw-text)
+         ;; At least "icontopbm" doesn't work with Windows because
+         ;; the line-break code is converted into CRLF by default.
+         (coding-system-for-write 'binary))
+      (and (eq 0 (apply 'call-process-region (point-min) (point-max)
+                       "uncompface"
+                       'delete '(t nil) nil))
+          (progn
+            (goto-char (point-min))
+            (insert "/* Format_version=1, Width=48, Height=48, Depth=1,\
+ Valid_bits_per_item=16 */\n")
+            ;; I just can't get "icontopbm" to work correctly on its
+            ;; own in XEmacs.  And Emacs doesn't understand un-raw pbm
+            ;; files.
+            (if (not (featurep 'xemacs))
+                (eq 0 (call-process-region (point-min) (point-max)
+                                           "icontopbm"
+                                           'delete '(t nil)))
+              (shell-command-on-region (point-min) (point-max)
+                                       "icontopbm | pnmnoraw"
+                                       (current-buffer) t)
+              t))
+          (buffer-string)))))
+
+(provide 'compface)
+
+;;; compface.el ends here