(mm-enrich-utf-8-by-mule-ucs): New function run when Mule-UCS is loaded under

 XEmacs.
(): Don't make duplicated entries in mm-mime-mule-charset-alist.

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index dc650ea..c7909d4 100644 (file)
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -7,6 +7,9 @@
 
        * mm-util.el (mm-mime-mule-charset-alist): Add the windows-1251
        entry.  From Ilya N. Golubev <gin@mo.msk.ru>.
+       (mm-enrich-utf-8-by-mule-ucs): New function run when Mule-UCS is
+       loaded under XEmacs.
+       (): Don't make duplicated entries in mm-mime-mule-charset-alist.
 
 2004-06-28  Jesper Harder  <harder@ifa.au.dk>
 

diff --git a/lisp/mm-util.el b/lisp/mm-util.el
index 9c7e09a..6f3861a 100644 (file)
--- a/lisp/mm-util.el
+++ b/lisp/mm-util.el
@@ -262,24 +262,45 @@ system object in XEmacs."
                       (coding-system-get 'mule-utf-8 'safe-charsets)))))
   "Alist of MIME-charset/MULE-charsets.")
 
-;; Correct by construction, but should be unnecessary:
-;; XEmacs hates it.
-(when (and (not (featurep 'xemacs))
-          (fboundp 'coding-system-list)
-          (fboundp 'sort-coding-systems))
-  (setq mm-mime-mule-charset-alist
-       (apply
-        'nconc
-        (mapcar
-         (lambda (cs)
-           (when (and (or (coding-system-get cs :mime-charset) ; Emacs 22
-                          (coding-system-get cs 'mime-charset))
-                      (not (eq t (coding-system-get cs 'safe-charsets))))
-             (list (cons (or (coding-system-get cs :mime-charset)
-                             (coding-system-get cs 'mime-charset))
-                         (delq 'ascii
-                               (coding-system-get cs 'safe-charsets))))))
-         (sort-coding-systems (coding-system-list 'base-only))))))
+(defun mm-enrich-utf-8-by-mule-ucs ()
+  "Make the `utf-8' MIME charset usable by the Mule-UCS package.
+This function will run when the `un-define' module is loaded under
+XEmacs, and fill the `utf-8' entry in `mm-mime-mule-charset-alist'
+with Mule charsets.  It is completely useless for Emacs."
+  (setq after-load-alist
+       (delete '("un-define" (mm-enrich-utf-8-by-mule-ucs))
+               after-load-alist))
+  (when (boundp 'unicode-basic-translation-charset-order-list)
+    (condition-case nil
+       (let ((val (delq
+                   'ascii
+                   (symbol-value
+                    'unicode-basic-translation-charset-order-list)))
+             (elem (assq 'utf-8 mm-mime-mule-charset-alist)))
+         (if elem
+             (setcdr elem val)
+           (setq mm-mime-mule-charset-alist
+                 (nconc mm-mime-mule-charset-alist
+                        (list (cons 'utf-8 val))))))
+      (error))))
+
+;; Correct by construction, but should be unnecessary for Emacs:
+(if (featurep 'xemacs)
+    (eval-after-load "un-define" '(mm-enrich-utf-8-by-mule-ucs))
+  (when (and (fboundp 'coding-system-list)
+            (fboundp 'sort-coding-systems))
+    (let ((css (sort-coding-systems (coding-system-list 'base-only)))
+         cs mime mule alist)
+      (while css
+       (setq cs (pop css)
+             mime (or (coding-system-get cs :mime-charset) ; Emacs 22
+                      (coding-system-get cs 'mime-charset)))
+       (when (and mime
+                  (not (eq t (setq mule
+                                   (coding-system-get cs 'safe-charsets))))
+                  (not (assq mime alist)))
+         (push (cons mime (delq 'ascii mule)) alist)))
+      (setq mm-mime-mule-charset-alist (nreverse alist)))))
 
 (defvar mm-hack-charsets '(iso-8859-15 iso-2022-jp-2)
   "A list of special charsets.