Revision: miles@gnu.org--gnu-2005/emacs--unicode--0--patch-24

[gnu-emacs] / lisp / gnus / rfc2047.el

diff --git a/lisp/gnus/rfc2047.el b/lisp/gnus/rfc2047.el
index e6461bf2627b0dbe494bfdc150fae906f4e25037..ab00edb912864d6b71afbede200bd1b43dbbc87f 100644 (file)
--- a/lisp/gnus/rfc2047.el
+++ b/lisp/gnus/rfc2047.el
@@ -1,5 +1,7 @@
 ;;; rfc2047.el --- functions for encoding and decoding rfc2047 messages
-;; Copyright (C) 1998, 1999, 2000, 2002, 2003 Free Software Foundation, Inc.
+
+;; Copyright (C) 1998, 1999, 2000, 2002, 2003, 2004, 2005
+;;        Free Software Foundation, Inc.
 
 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
 ;;     MORIOKA Tomohiko <morioka@jaist.ac.jp>
@@ -50,6 +52,7 @@ Value is what BODY returns."
 
 (require 'qp)
 (require 'mm-util)
+(require 'ietf-drums)
 ;; Fixme: Avoid this (used for mail-parse-charset) mm dependence on gnus.
 (require 'mail-prsvr)
 (require 'base64)
@@ -277,7 +280,7 @@ The buffer may be narrowed."
   ;; (make-char-table 'syntax-table '(2)) only works in Emacs.
   (let ((table (make-syntax-table)))
     ;; The following is done to work for setting all elements of the table
-    ;; in Emacs 21 and 22 and XEmacs; it appears to be the cleanest way.
+    ;; in Emacs 21-23 and XEmacs; it appears to be the cleanest way.
     ;; Play safe and don't assume the form of the word syntax entry --
     ;; copy it from ?a.
     (if (fboundp 'set-char-table-range)        ; Emacs
@@ -639,6 +642,9 @@ By default, the region is treated as containing addresses (see
     "=\\?\\([^][\000-\040()<>@,\;:\\\"/?.=]+\\)\\?\\(B\\|Q\\)\
 \\?\\([!->@-~ +]*\\)\\?="))
 
+(defvar rfc2047-quote-decoded-words-containing-tspecials nil
+  "If non-nil, quote decoded words containing special characters.")
+
 ;; Fixme: This should decode in place, not cons intermediate strings.
 ;; Also check whether it needs to worry about delimiting fields like
 ;; encoding.
@@ -673,14 +679,66 @@ By default, the region is treated as containing addresses (see
          (insert (rfc2047-parse-and-decode
                   (prog1
                       (match-string 0)
-                    (delete-region (match-beginning 0) (match-end 0)))))
-         ;; Remove newlines between decoded words, though such things
-         ;; essentially must not be there.
+                    (delete-region e (match-end 0)))))
+         (while (looking-at rfc2047-encoded-word-regexp)
+           (insert (rfc2047-parse-and-decode
+                    (prog1
+                        (match-string 0)
+                      (delete-region (point) (match-end 0))))))
          (save-restriction
            (narrow-to-region e (point))
            (goto-char e)
+           ;; Remove newlines between decoded words, though such
+           ;; things essentially must not be there.
            (while (re-search-forward "[\n\r]+" nil t)
              (replace-match " "))
+           ;; Quote decoded words if there are special characters
+           ;; which might violate RFC2822.
+           (when (and rfc2047-quote-decoded-words-containing-tspecials
+                      (let ((regexp (car (rassq
+                                          'address-mime
+                                          rfc2047-header-encoding-alist))))
+                        (when regexp
+                          (save-restriction
+                            (widen)
+                            (beginning-of-line)
+                            (while (and (memq (char-after) '(?  ?\t))
+                                        (zerop (forward-line -1))))
+                            (looking-at regexp)))))
+             (let (quoted)
+               (goto-char e)
+               (skip-chars-forward " \t")
+               (setq start (point))
+               (setq quoted (eq (char-after) ?\"))
+               (goto-char (point-max))
+               (skip-chars-backward " \t")
+               (if (setq quoted (and quoted
+                                     (> (point) (1+ start))
+                                     (eq (char-before) ?\")))
+                   (progn
+                     (backward-char)
+                     (setq start (1+ start)
+                           end (point-marker)))
+                 (setq end (point-marker)))
+               (goto-char start)
+               (while (search-forward "\"" end t)
+                 (when (prog2
+                           (backward-char)
+                           (zerop (% (skip-chars-backward "\\\\") 2))
+                         (goto-char (match-beginning 0)))
+                   (insert "\\"))
+                 (forward-char))
+               (when (and (not quoted)
+                          (progn
+                            (goto-char start)
+                            (re-search-forward
+                             (concat "[" ietf-drums-tspecials "]")
+                             end t)))
+                 (goto-char start)
+                 (insert "\"")
+                 (goto-char end)
+                 (insert "\""))
+               (set-marker end nil)))
            (goto-char (point-max)))
          (when (and (mm-multibyte-p)
                     mail-parse-charset