;;; mm-util.el --- Utility functions for MIME things
-;; Copyright (C) 1998 Free Software Foundation, Inc.
+;; Copyright (C) 1998,99 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
;;; Code:
-(defvar mm-default-coding-system nil
- "The default coding system to use.")
-
-(defvar mm-known-charsets '(iso-8859-1)
- "List of known charsets.")
-
(defvar mm-mime-mule-charset-alist
'((us-ascii ascii)
(iso-8859-1 latin-iso8859-1)
(iso-8859-7 greek-iso8859-7)
(iso-8859-8 hebrew-iso8859-8)
(iso-8859-9 latin-iso8859-9)
- (iso-2022-jp latin-jisx0201
- japanese-jisx0208-1978 japanese-jisx0208)
+ (viscii vietnamese-viscii-lower)
+ (iso-2022-jp latin-jisx0201 japanese-jisx0208 japanese-jisx0208-1978)
(euc-kr korean-ksc5601)
(cn-gb-2312 chinese-gb2312)
(cn-big5 chinese-big5-1 chinese-big5-2)
+ (tibetan tibetan)
+ (thai-tis620 thai-tis620)
+ (iso-2022-7bit ethiopic arabic-1-column arabic-2-column)
(iso-2022-jp-2 latin-iso8859-1 greek-iso8859-7
latin-jisx0201 japanese-jisx0208-1978
chinese-gb2312 japanese-jisx0208
- korean-ksc5601 japanese-jisx0212)
+ korean-ksc5601 japanese-jisx0212
+ katakana-jisx0201)
(iso-2022-int-1 latin-iso8859-1 greek-iso8859-7
latin-jisx0201 japanese-jisx0208-1978
chinese-gb2312 japanese-jisx0208
(lambda (elem)
(let ((nfunc (intern (format "mm-%s" (car elem)))))
(if (fboundp (car elem))
- (fset nfunc (car elem))
- (fset nfunc (cdr elem)))))
+ (defalias nfunc (car elem))
+ (defalias nfunc (cdr elem)))))
'((decode-coding-string . (lambda (s a) s))
(encode-coding-string . (lambda (s a) s))
(encode-coding-region . ignore)
- (decode-coding-region . ignore)
(coding-system-list . ignore)
+ (decode-coding-region . ignore)
(char-int . identity)
(device-type . ignore)
(coding-system-equal . equal)
prompt (mapcar (lambda (s) (list (symbol-name (car s))))
mm-mime-mule-charset-alist)))))))
-(defvar mm-charset-coding-system-alist
- (let ((rest
- '((gb2312 . cn-gb-2312)
- (iso-2022-jp-2 . iso-2022-7bit-ss2)
- (x-ctext . ctext)))
- (systems (mm-coding-system-list))
- dest)
- (while rest
- (let ((pair (car rest)))
- (unless (memq (car pair) systems)
- (setq dest (cons pair dest))))
- (setq rest (cdr rest)))
- dest)
- "Charset/coding system 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-synonym-alist
+ '((big5 . cn-big5)
+ (gb2312 . cn-gb-2312)
+ (x-ctext . ctext))
+ "A mapping from invalid charset names to the real charset names.")
+
+(defun mm-coding-system-p (sym)
+ "Return non-nil if SYM is a coding system."
+ (or (and (fboundp 'coding-system-p) (coding-system-p sym))
+ (memq sym (mm-get-coding-system-list))))
+
+(defvar mm-binary-coding-system
+ (cond
+ ((mm-coding-system-p 'no-conversion) 'no-conversion)
+ ((mm-coding-system-p 'binary) 'binary)
+ (t nil))
+ "100% binary coding system.")
+
+(defvar mm-text-coding-system
+ (or (if (memq system-type '(windows-nt ms-dos ms-windows))
+ (and (mm-coding-system-p 'raw-text-dos) 'raw-text-dos)
+ (and (mm-coding-system-p 'raw-text) 'raw-text))
+ mm-binary-coding-system)
+ "Text-safe coding system (For removing ^M).")
+(defvar mm-text-coding-system-for-write nil
+ "Text coding system for write.")
+
+(defvar mm-auto-save-coding-system
+ (cond
+ ((mm-coding-system-p 'emacs-mule)
+ (if (memq system-type '(windows-nt ms-dos ms-windows))
+ (if (mm-coding-system-p 'emacs-mule-dos)
+ 'emacs-mule-dos mm-binary-coding-system)
+ 'emacs-mule))
+ ((mm-coding-system-p 'escape-quoted) 'escape-quoted)
+ (t mm-binary-coding-system))
+ "Coding system of auto save file.")
+
+;;; Internal variables:
+
+;;; Functions:
(defun mm-mule-charset-to-mime-charset (charset)
"Return the MIME charset corresponding to MULE CHARSET."
(when (stringp charset)
(setq charset (intern (downcase charset))))
(setq charset
- (or (cdr (assq charset mm-charset-coding-system-alist))
+ (or (cdr (assq charset mm-charset-synonym-alist))
charset))
(when lbt
(setq charset (intern (format "%s-%s" charset lbt))))
(cond
;; Running in a non-MULE environment.
- ((and (null (mm-coding-system-list))
- (memq charset mm-known-charsets))
+ ((null (mm-get-coding-system-list))
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
(defsubst mm-enable-multibyte ()
"Enable multibyte in the current buffer."
- (when (fboundp 'set-buffer-multibyte)
+ (when (and (fboundp 'set-buffer-multibyte)
+ (boundp 'enable-multibyte-characters)
+ (default-value 'enable-multibyte-characters))
(set-buffer-multibyte t)))
-(defun mm-mime-charset (charset b e)
+(defsubst mm-disable-multibyte ()
+ "Disable multibyte in the current buffer."
+ (when (fboundp 'set-buffer-multibyte)
+ (set-buffer-multibyte nil)))
+
+(defun mm-preferred-coding-system (charset)
+ ;; A typo in some Emacs versions.
+ (or (get-charset-property charset 'prefered-coding-system)
+ (get-charset-property charset 'preffered-coding-system)))
+
+(defun mm-mime-charset (charset)
+ "Return the MIME charset corresponding to the MULE CHARSET."
(if (fboundp 'coding-system-get)
+ ;; This exists in Emacs 20.
(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)))))
+ (and (mm-preferred-coding-system charset)
+ (coding-system-get
+ (mm-preferred-coding-system charset) 'mime-charset))
+ (and (eq charset 'ascii)
+ 'us-ascii)
+ (mm-preferred-coding-system charset)
+ (mm-mule-charset-to-mime-charset charset))
+ ;; This is for XEmacs.
(mm-mule-charset-to-mime-charset charset)))
+(defun mm-find-mime-charset-region (b e)
+ "Return the MIME charsets needed to encode the region between B and E."
+ (let ((charsets
+ (mapcar 'mm-mime-charset
+ (delq 'ascii
+ (mm-find-charset-region b e)))))
+ (when (memq 'iso-2022-jp-2 charsets)
+ (setq charsets (delq 'iso-2022-jp charsets)))
+ (delete-duplicates charsets)))
+
(defsubst mm-multibyte-p ()
"Say whether multibyte is enabled."
(and (boundp 'enable-multibyte-characters)
(multibyte (make-symbol "multibyte")))
`(if (not (boundp 'enable-multibyte-characters))
(with-temp-buffer ,@forms)
- (let ((,multibyte (default-value enable-multibyte-characters))
+ (let ((,multibyte (default-value 'enable-multibyte-characters))
,temp-buffer)
- (setq-default enable-multibyte-characters nil)
- (setq ,temp-buffer
- (get-buffer-create (generate-new-buffer-name " *temp*")))
(unwind-protect
- (with-current-buffer ,temp-buffer
- ,@forms)
- (and (buffer-name ,temp-buffer)
- (kill-buffer ,temp-buffer))
+ (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
+ (fboundp 'find-charset-region))
+ (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)
+ (delq nil (list 'ascii mail-parse-charset))))))
+ (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)))))))))))
+
+(defun mm-read-charset (prompt)
+ "Return a charset."
+ (intern
+ (completing-read
+ prompt
+ (mapcar (lambda (e) (list (symbol-name (car e))))
+ mm-mime-mule-charset-alist)
+ nil t)))
+
+(defun mm-quote-arg (arg)
+ "Return a version of ARG that is safe to evaluate in a shell."
+ (let ((pos 0) new-pos accum)
+ ;; *** bug: we don't handle newline characters properly
+ (while (setq new-pos (string-match "[]*[;!'`\"$\\& \t{} |()<>]" arg pos))
+ (push (substring arg pos new-pos) accum)
+ (push "\\" accum)
+ (push (list (aref arg new-pos)) accum)
+ (setq pos (1+ new-pos)))
+ (if (= pos 0)
+ arg
+ (apply 'concat (nconc (nreverse accum) (list (substring arg pos)))))))
+
+(defun mm-auto-mode-alist ()
+ "Return an `auto-mode-alist' with only the .gz (etc) thingies."
+ (let ((alist auto-mode-alist)
+ out)
+ (while alist
+ (when (listp (cdar alist))
+ (push (car alist) out))
+ (pop alist))
+ (nreverse out)))
+
+(defvar mm-inhibit-file-name-handlers
+ '(jka-compr-handler)
+ "A list of handlers doing (un)compression (etc) thingies.")
+
+(defun mm-insert-file-contents (filename &optional visit beg end replace
+ inhibit)
+ "Like `insert-file-contents', q.v., but only reads in the file.
+A buffer may be modified in several ways after reading into the buffer due
+to advanced Emacs features, such as file-name-handlers, format decoding,
+find-file-hooks, etc.
+If INHIBIT is non-nil, inhibit mm-inhibit-file-name-handlers.
+ This function ensures that none of these modifications will take place."
+ (let ((format-alist nil)
+ (auto-mode-alist (if inhibit nil (mm-auto-mode-alist)))
+ (default-major-mode 'fundamental-mode)
+ (enable-local-variables nil)
+ (after-insert-file-functions nil)
+ (enable-local-eval nil)
+ (find-file-hooks nil)
+ (inhibit-file-name-operation (if inhibit
+ 'insert-file-contents
+ inhibit-file-name-operation))
+ (inhibit-file-name-handlers
+ (if inhibit
+ (append mm-inhibit-file-name-handlers
+ inhibit-file-name-handlers)
+ inhibit-file-name-handlers)))
+ (insert-file-contents filename visit beg end replace)))
+
+(defun mm-append-to-file (start end filename &optional codesys inhibit)
+ "Append the contents of the region to the end of file FILENAME.
+When called from a function, expects three arguments,
+START, END and FILENAME. START and END are buffer positions
+saying what text to write.
+Optional fourth argument specifies the coding system to use when
+encoding the file.
+If INHIBIT is non-nil, inhibit mm-inhibit-file-name-handlers."
+ (let ((coding-system-for-write
+ (or codesys mm-text-coding-system-for-write
+ mm-text-coding-system))
+ (inhibit-file-name-operation (if inhibit
+ 'append-to-file
+ inhibit-file-name-operation))
+ (inhibit-file-name-handlers
+ (if inhibit
+ (append mm-inhibit-file-name-handlers
+ inhibit-file-name-handlers)
+ inhibit-file-name-handlers)))
+ (append-to-file start end filename)))
+
+(defun mm-write-region (start end filename &optional append visit lockname
+ coding-system inhibit)
+
+ "Like `write-region'.
+If INHIBIT is non-nil, inhibit mm-inhibit-file-name-handlers."
+ (let ((coding-system-for-write
+ (or coding-system mm-text-coding-system-for-write
+ mm-text-coding-system))
+ (inhibit-file-name-operation (if inhibit
+ 'write-region
+ inhibit-file-name-operation))
+ (inhibit-file-name-handlers
+ (if inhibit
+ (append mm-inhibit-file-name-handlers
+ inhibit-file-name-handlers)
+ inhibit-file-name-handlers)))
+ (write-region start end filename append visit lockname)))
(provide 'mm-util)
projects / gnus / blobdiff