(mm-mime-mule-charset-alist): Use shift_jis instead of iso-2022-jp-2 for the

 katakana-jisx0201 mule charset;
 add new entries for the mime charsets iso-2022-jp-3 and shift_jis.
(mm-coding-system-priorities): Use shift_jis and iso-8859-1 instead of
 japanese-shift-jis and iso-latin-1 respectively in order to share the default
 value with both Emacs and XEmacs-mule.
(mm-mule-charset-to-mime-charset): Make mm-coding-system-priorities effective.
(mm-sort-coding-systems-predicate): Canonicalize coding-systems while
 predicating of candidates upon the priorities.

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 14570b5..0618883 100644 (file)
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,16 @@
+2004-06-28  Katsumi Yamaoka  <yamaoka@jpl.org>
+
+       * mm-util.el (mm-mime-mule-charset-alist): Use shift_jis instead
+       of iso-2022-jp-2 for the katakana-jisx0201 mule charset; add new
+       entries for the mime charsets iso-2022-jp-3 and shift_jis.
+       (mm-coding-system-priorities): Use shift_jis and iso-8859-1
+       instead of japanese-shift-jis and iso-latin-1 respectively in
+       order to share the default value with both Emacs and XEmacs-mule.
+       (mm-mule-charset-to-mime-charset): Make
+       mm-coding-system-priorities effective.
+       (mm-sort-coding-systems-predicate): Canonicalize coding-systems
+       while predicating of candidates upon the priorities.
+
 2004-06-27  Jesper Harder  <harder@ifa.au.dk>
 
        * gnus-sum.el (gnus-summary-make-menu-bar): Add

diff --git a/lisp/mm-util.el b/lisp/mm-util.el
index 9c7e0f6..b25cf23 100644 (file)
--- a/lisp/mm-util.el
+++ b/lisp/mm-util.el
@@ -230,8 +230,7 @@ In XEmacs, also return non-nil if CS is a coding system object."
     (iso-2022-jp-2 latin-iso8859-1 greek-iso8859-7
                   latin-jisx0201 japanese-jisx0208-1978
                   chinese-gb2312 japanese-jisx0208
-                  korean-ksc5601 japanese-jisx0212
-                  katakana-jisx0201)
+                  korean-ksc5601 japanese-jisx0212)
     (iso-2022-int-1 latin-iso8859-1 greek-iso8859-7
                    latin-jisx0201 japanese-jisx0208-1978
                    chinese-gb2312 japanese-jisx0208
@@ -246,6 +245,9 @@ In XEmacs, also return non-nil if CS is a coding system object."
                    chinese-cns11643-3 chinese-cns11643-4
                    chinese-cns11643-5 chinese-cns11643-6
                    chinese-cns11643-7)
+    (iso-2022-jp-3 latin-jisx0201 japanese-jisx0208-1978 japanese-jisx0208
+                  japanese-jisx0213-1 japanese-jisx0213-2)
+    (shift_jis latin-jisx0201 katakana-jisx0201 japanese-jisx0208)
     ,(if (or (not (fboundp 'charsetp)) ;; non-Mule case
             (charsetp 'unicode-a)
             (not (mm-coding-system-p 'mule-utf-8)))
@@ -309,9 +311,8 @@ Valid elements include:
   (if (boundp 'current-language-environment)
       (let ((lang (symbol-value 'current-language-environment)))
        (cond ((string= lang "Japanese")
-              ;; Japanese users may prefer iso-2022-jp to shift-jis.
-              '(iso-2022-jp iso-2022-jp-2 japanese-shift-jis
-                            iso-latin-1 utf-8)))))
+              ;; Japanese users may prefer iso-2022-jp to shift_jis.
+              '(iso-2022-jp iso-2022-jp-2 shift_jis iso-8859-1 utf-8)))))
   "Preferred coding systems for encoding outgoing messages.
 
 More than one suitable coding system may be found for some text.
@@ -337,16 +338,20 @@ mail with multiple parts is preferred to sending a Unicode one.")
   "Return the MIME charset corresponding to the given Mule CHARSET."
   (if (and (fboundp 'find-coding-systems-for-charsets)
           (fboundp 'sort-coding-systems))
-      (let (mime)
-       (dolist (cs (sort-coding-systems
-                    (copy-sequence
-                     (find-coding-systems-for-charsets (list charset)))))
-         (unless mime
-           (when cs
-             (setq mime (or (coding-system-get cs :mime-charset)
-                            (coding-system-get cs 'mime-charset))))))
+      (let ((css (sort (sort-coding-systems
+                       (find-coding-systems-for-charsets (list charset)))
+                      'mm-sort-coding-systems-predicate))
+           cs mime)
+       (while (and (not mime)
+                   css)
+         (when (setq cs (pop css))
+           (setq mime (or (coding-system-get cs :mime-charset)
+                          (coding-system-get cs 'mime-charset)))))
        mime)
-    (let ((alist mm-mime-mule-charset-alist)
+    (let ((alist (mapcar (lambda (cs)
+                          (assq cs mm-mime-mule-charset-alist))
+                        (sort (mapcar 'car mm-mime-mule-charset-alist)
+                              'mm-sort-coding-systems-predicate)))
          out)
       (while alist
        (when (memq charset (cdar alist))
@@ -536,11 +541,14 @@ This affects whether coding conversion should be attempted generally."
   (let ((priorities
         (mapcar (lambda (cs)
                   ;; Note: invalid entries are dropped silently
-                  (and (coding-system-p cs)
+                  (and (mm-coding-system-p cs)
                        (coding-system-base cs)))
                 mm-coding-system-priorities)))
-    (> (length (memq a priorities))
-       (length (memq b priorities)))))
+    (and (mm-coding-system-p a)
+        (if (mm-coding-system-p b)
+            (> (length (memq (coding-system-base a) priorities))
+               (length (memq (coding-system-base b) priorities)))
+          t))))
 
 (defun mm-find-mime-charset-region (b e &optional hack-charsets)
   "Return the MIME charsets needed to encode the region between B and E.