;;; Code:
-(eval-and-compile
- (if (fboundp 'decode-coding-string)
- (fset 'mm-decode-coding-string 'decode-coding-string)
- (fset 'mm-decode-coding-string (lambda (s a) s))))
+(defvar mm-running-xemacs (string-match "XEmacs" emacs-version))
-(eval-and-compile
- (if (fboundp 'encode-coding-string)
- (fset 'mm-encode-coding-string 'encode-coding-string)
- (fset 'mm-encode-coding-string (lambda (s a) s))))
+(defvar mm-binary-coding-system
+ (if mm-running-xemacs
+ 'binary 'no-conversion)
+ "100% binary coding system.")
-(eval-and-compile
- (if (fboundp 'encode-coding-region)
- (fset 'mm-encode-coding-region 'encode-coding-region)
- (fset 'mm-encode-coding-string 'ignore)))
-
-(eval-and-compile
- (if (fboundp 'decode-coding-region)
- (fset 'mm-decode-coding-region 'decode-coding-region)
- (fset 'mm-decode-coding-string 'ignore)))
+(defvar mm-default-coding-system nil
+ "The default coding system to use.")
-(eval-and-compile
- (if (fboundp 'coding-system-list)
- (fset 'mm-coding-system-list 'coding-system-list)
- (fset 'mm-coding-system-list 'ignore)))
+(defvar mm-known-charsets '(iso-8859-1)
+ "List of known charsets.
+Use this under non-Mule Emacsen to specify which charsets your Emacs
+can display. Also see `mm-default-charset'.")
-(eval-and-compile
- (if (fboundp 'coding-system-equal)
- (fset 'mm-coding-system-equal 'coding-system-equal)
- (fset 'mm-coding-system-equal 'equal)))
+(defvar mm-default-charset 'iso-8859-1
+ "Default charset assumed to be used when viewing non-ASCII characters.
+This variable is used only in non-Mule Emacsen.")
(defvar mm-mime-mule-charset-alist
'((us-ascii ascii)
(iso-8859-7 greek-iso8859-7)
(iso-8859-8 hebrew-iso8859-8)
(iso-8859-9 latin-iso8859-9)
+ (iso-2022-jp-2 japanese-jisx0208)
(iso-2022-jp latin-jisx0201
- japanese-jisx0208-1978 japanese-jisx0208)
+ japanese-jisx0208-1978)
(euc-kr korean-ksc5601)
(cn-gb-2312 chinese-gb2312)
(cn-big5 chinese-big5-1 chinese-big5-2)
chinese-cns11643-7))
"Alist of MIME-charset/MULE-charsets.")
+
+(eval-and-compile
+ (mapcar
+ (lambda (elem)
+ (let ((nfunc (intern (format "mm-%s" (car elem)))))
+ (if (fboundp (car elem))
+ (fset nfunc (car elem))
+ (fset nfunc (cdr elem)))))
+ '((decode-coding-string . (lambda (s a) s))
+ (encode-coding-string . (lambda (s a) s))
+ (encode-coding-region . ignore)
+ (coding-system-list . ignore)
+ (decode-coding-region . ignore)
+ (char-int . identity)
+ (device-type . ignore)
+ (coding-system-equal . equal)
+ (annotationp . ignore)
+ (set-buffer-file-coding-system . ignore)
+ (make-char
+ . (lambda (charset int)
+ (int-to-char int)))
+ (read-coding-system
+ . (lambda (prompt)
+ "Prompt the user for a coding system."
+ (completing-read
+ prompt (mapcar (lambda (s) (list (symbol-name (car s))))
+ mm-mime-mule-charset-alist)))))))
+
+(defvar mm-coding-system-list nil)
+(defun mm-get-coding-system-list ()
+ "Get the coding system list."
+ (or mm-coding-system-list
+ (setq mm-coding-system-list (mm-coding-system-list))))
+
(defvar mm-charset-coding-system-alist
(let ((rest
- '((us-ascii . iso-8859-1)
- (gb2312 . cn-gb-2312)
+ '((gb2312 . cn-gb-2312)
(iso-2022-jp-2 . iso-2022-7bit-ss2)
(x-ctext . ctext)))
- (systems (mm-coding-system-list))
+ (systems (mm-get-coding-system-list))
dest)
(while rest
(let ((pair (car rest)))
dest)
"Charset/coding system alist.")
+;;;Internal variable
+(defvar mm-charset-iso-8859-1-forced nil)
+
(defun mm-mule-charset-to-mime-charset (charset)
"Return the MIME charset corresponding to MULE CHARSET."
(let ((alist mm-mime-mule-charset-alist)
used as the line break code type of the coding system."
(when (stringp charset)
(setq charset (intern (downcase charset))))
+ (if (and mm-charset-iso-8859-1-forced
+ (eq charset 'iso-8859-1))
+ (setq charset mm-charset-iso-8859-1-forced))
(setq charset
(or (cdr (assq charset mm-charset-coding-system-alist))
charset))
(setq charset (intern (format "%s-%s" charset lbt))))
(cond
;; Running in a non-MULE environment.
- ((and (null (mm-coding-system-list))
- (eq charset 'iso-8859-1))
+ ((and (null (mm-get-coding-system-list))
+ (or (eq charset mm-default-charset)
+ (memq charset mm-known-charsets)))
charset)
+ ;; ascii
+ ((eq charset 'us-ascii)
+ 'ascii)
;; Check to see whether we can handle this charset.
- ((memq charset (mm-coding-system-list))
+ ((memq charset (mm-get-coding-system-list))
charset)
;; Nope.
(t
(setq idx (1+ idx)))
string))
-(defun mm-enable-multibyte ()
+(defsubst mm-enable-multibyte ()
"Enable multibyte in the current buffer."
- (when (fboundp 'set-buffer-multibyte)
+ (when (and (fboundp 'set-buffer-multibyte)
+ (default-value 'enable-multibyte-characters))
(set-buffer-multibyte t)))
-(defun mm-insert-rfc822-headers (charset encoding)
- "Insert text/plain headers with CHARSET and ENCODING."
- (insert "MIME-Version: 1.0\n")
- (insert "Content-Type: text/plain; charset=\""
- (downcase (symbol-name charset)) "\"\n")
- (insert "Content-Transfer-Encoding: "
- (downcase (symbol-name encoding)) "\n"))
-
-(defun mm-content-type-charset (header)
- "Return the charset parameter from HEADER."
- (when (string-match "charset *= *\"? *\\([-0-9a-zA-Z_]+\\)\"? *$" header)
- (intern (match-string 1 header))))
+(defsubst mm-disable-multibyte ()
+ "Disable multibyte in the current buffer."
+ (when (fboundp 'set-buffer-multibyte)
+ (set-buffer-multibyte nil)))
+
+(defun mm-mime-charset (charset b e)
+ (if (fboundp 'coding-system-get)
+ (or
+ (and
+ mm-default-coding-system
+ (let ((safe (coding-system-get mm-default-coding-system
+ 'safe-charsets)))
+ (or (eq safe t) (memq charset safe)))
+ (coding-system-get mm-default-coding-system 'mime-charset))
+ (coding-system-get
+ (get-charset-property charset 'prefered-coding-system)
+ 'mime-charset)
+ (car (memq charset (find-coding-systems-region
+ (point-min) (point-max)))))
+ (mm-mule-charset-to-mime-charset charset)))
+
+(defsubst mm-multibyte-p ()
+ "Say whether multibyte is enabled."
+ (and (boundp 'enable-multibyte-characters)
+ enable-multibyte-characters))
+
+(defmacro mm-with-unibyte-buffer (&rest forms)
+ "Create a temporary buffer, and evaluate FORMS there like `progn'.
+See also `with-temp-file' and `with-output-to-string'."
+ (let ((temp-buffer (make-symbol "temp-buffer"))
+ (multibyte (make-symbol "multibyte")))
+ `(if (not (boundp 'enable-multibyte-characters))
+ (with-temp-buffer ,@forms)
+ (let ((,multibyte (default-value 'enable-multibyte-characters))
+ ,temp-buffer)
+ (unwind-protect
+ (progn
+ (setq-default enable-multibyte-characters nil)
+ (setq ,temp-buffer
+ (get-buffer-create (generate-new-buffer-name " *temp*")))
+ (unwind-protect
+ (with-current-buffer ,temp-buffer
+ (let ((buffer-file-coding-system mm-binary-coding-system)
+ (coding-system-for-read mm-binary-coding-system)
+ (coding-system-for-write mm-binary-coding-system))
+ ,@forms))
+ (and (buffer-name ,temp-buffer)
+ (kill-buffer ,temp-buffer))))
+ (setq-default enable-multibyte-characters ,multibyte))))))
+(put 'mm-with-unibyte-buffer 'lisp-indent-function 0)
+(put 'mm-with-unibyte-buffer 'edebug-form-spec '(body))
+
+(defun mm-find-charset-region (b e)
+ "Return a list of charsets in the region."
+ (cond
+ ((and (boundp 'enable-multibyte-characters)
+ enable-multibyte-characters)
+ (find-charset-region b e))
+ ((not (boundp 'current-language-environment))
+ (save-excursion
+ (save-restriction
+ (narrow-to-region b e)
+ (goto-char (point-min))
+ (skip-chars-forward "\0-\177")
+ (if (eobp)
+ '(ascii)
+ ;;;!!!bogus
+ (list 'ascii 'latin-iso8859-1)))))
+ (t
+ ;; We are in a unibyte buffer, so we futz around a bit.
+ (save-excursion
+ (save-restriction
+ (narrow-to-region b e)
+ (goto-char (point-min))
+ (let ((entry (assoc (capitalize current-language-environment)
+ language-info-alist)))
+ (skip-chars-forward "\0-\177")
+ (if (eobp)
+ '(ascii)
+ (list 'ascii (car (last (assq 'charset entry)))))))))))
(provide 'mm-util)
projects / gnus / blobdiff