Synch to No Gnus 200409210948.

[elisp/gnus.git-] / texi / infohack.el

diff --git a/texi/infohack.el b/texi/infohack.el
index ad4abd0..31fd019 100644 (file)
--- a/texi/infohack.el
+++ b/texi/infohack.el
@@ -1,5 +1,5 @@
 ;;; infohack.el --- a hack to format info file.
-;; Copyright (C)  2001  Free Software Foundation, Inc.
+;; Copyright (C)  2001, 2003, 2004  Free Software Foundation, Inc.
 
 ;; Author: Shenghuo Zhu <zsh@cs.rochester.edu>
 ;; Keywords: info
@@ -32,6 +32,39 @@
   (setq load-path (mapcar 'expand-file-name load-path)))
 (load-file (expand-file-name "ptexinfmt.el" "./"))
 
+(if (fboundp 'texinfo-copying)
+    nil
+  ;; Support @copying and @insertcopying for Emacs 21.3 and lesser and
+  ;; XEmacs.
+  (defvar texinfo-copying-text ""
+    "Text of the copyright notice and copying permissions.")
+
+  (defun texinfo-copying ()
+    "Copy the copyright notice and copying permissions from the Texinfo file,
+as indicated by the @copying ... @end copying command;
+insert the text with the @insertcopying command."
+    (let ((beg (progn (beginning-of-line) (point)))
+         (end  (progn (re-search-forward "^@end copying[ \t]*\n") (point))))
+      (setq texinfo-copying-text
+           (buffer-substring-no-properties
+            (save-excursion (goto-char beg) (forward-line 1) (point))
+            (save-excursion (goto-char end) (forward-line -1) (point))))
+      (delete-region beg end)))
+
+  (defun texinfo-insertcopying ()
+    "Insert the copyright notice and copying permissions from the Texinfo file,
+which are indicated by the @copying ... @end copying command."
+    (insert (concat "\n" texinfo-copying-text)))
+
+  (defadvice texinfo-format-scan (before expand-@copying-section activate)
+    "Extract @copying and replace @insertcopying with it."
+    (goto-char (point-min))
+    (when (search-forward "@copying" nil t)
+      (texinfo-copying))
+    (while (search-forward "@insertcopying" nil t)
+      (delete-region (match-beginning 0) (match-end 0))
+      (texinfo-insertcopying))))
+
 (defun infohack-remove-unsupported ()
   (goto-char (point-min))
   (while (re-search-forward "@\\(end \\)?ifnottex" nil t)
@@ -45,6 +78,10 @@
   (let ((dest-directory default-directory)
        (max-lisp-eval-depth (max max-lisp-eval-depth 600))
        coding-system)
+    ;; Emacs 21.3 doesn't support @documentencoding
+    (unless (get 'documentencoding 'texinfo-format)
+      (put 'documentencoding 'texinfo-format 
+          'texinfo-discard-line-with-args))
     (find-file file)
     (setq buffer-read-only nil)
     (setq coding-system buffer-file-coding-system)