X-Git-Url: http://git.chise.org/gitweb/?a=blobdiff_plain;f=mcharset.el;h=44a65cb63d7eacdefe25c4b5b30fde60ec478ee8;hb=ac4b34cee507bf4c839d83e3793309f06054b177;hp=3b02f6c2dfdf1d4dad2f320d233cbe5a247d8055;hpb=e47c19a9f98b560818385fb4fd7dca6b14f36767;p=elisp%2Fapel.git

diff --git a/mcharset.el b/mcharset.el
index 3b02f6c..44a65cb 100644
--- a/mcharset.el
+++ b/mcharset.el
@@ -1,8 +1,8 @@
 ;;; mcharset.el --- MIME charset API
 
-;; Copyright (C) 1997,1998 Free Software Foundation, Inc.
+;; Copyright (C) 1997,1998,1999 Free Software Foundation, Inc.
 
-;; Author: MORIOKA Tomohiko <morioka@jaist.ac.jp>
+;; Author: MORIOKA Tomohiko <tomo@m17n.org>
 ;; Keywords: emulation, compatibility, Mule
 
 ;; This file is part of APEL (A Portable Emacs Library).
@@ -25,6 +25,7 @@
 ;;; Code:
 
 (require 'poe)
+(require 'pcustom)
 
 (cond ((featurep 'mule)
        (cond ((featurep 'xemacs)
@@ -46,6 +47,27 @@
        (require 'mcs-ltn1)
        ))
 
+(defcustom default-mime-charset-for-write
+  (if (and (fboundp 'find-coding-system)
+	   (find-coding-system 'utf-8))
+      'utf-8
+    default-mime-charset)
+  "Default value of MIME-charset for encoding.
+It may be used when suitable MIME-charset is not found.
+It must be symbol."
+  :group 'i18n
+  :type 'mime-charset)
+
+(defcustom default-mime-charset-detect-method-for-write
+  nil
+  "Function called when suitable MIME-charset is not found to encode.
+It must be nil or function.
+If it is nil, variable `default-mime-charset-for-write' is used.
+If it is a function, interface must be (TYPE CHARSETS &rest ARGS).
+CHARSETS is list of charset.
+If TYPE is 'region, ARGS has START and END."
+  :group 'i18n
+  :type '(choice function (const nil)))
 
 (defun charsets-to-mime-charset (charsets)
   "Return MIME charset from list of charset CHARSETS.
@@ -69,6 +91,24 @@ Return nil if suitable mime-charset is not found."
 	    (setq rest (cdr rest)))
 	  ))))
 
+(defun find-mime-charset-by-charsets (charsets &optional mode &rest args)
+  "Like `charsets-to-mime-charset', but it does not return nil.
+
+When suitable mime-charset is not found and variable
+`default-mime-charset-detect-method-for-write' is not nil,
+`find-mime-charset-by-charsets' calls the variable as function and
+return the return value of the function.
+Interface of the function is (MODE CHARSETS &rest ARGS).
+
+When suitable mime-charset is not found and variable
+`default-mime-charset-detect-method-for-write' is nil,
+variable `default-mime-charset-for-write' is returned."
+  (or (charsets-to-mime-charset charsets)
+      (if default-mime-charset-detect-method-for-write
+	  (apply default-mime-charset-detect-method-for-write
+		 mode charsets args)
+	default-mime-charset-for-write)))
+
 
 ;;; @ end
 ;;;