-;;; mm-util.el --- Utility functions for MIME things
+;;; mm-util.el --- Utility functions for Mule and low level things
;; Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;;; Code:
+(eval-when-compile (require 'cl))
(require 'mail-prsvr)
(defvar mm-mime-mule-charset-alist
prompt
(mapcar (lambda (e) (list (symbol-name (car e))))
mm-mime-mule-charset-alist)
- nil t)))))))
+ nil t))))
+ (subst-char-in-string
+ . (lambda (from to string) ;; stolen (and renamed) from nnheader.el
+ "Replace characters in STRING from FROM to TO."
+ (let ((string (substring string 0)) ;Copy string.
+ (len (length string))
+ (idx 0))
+ ;; Replace all occurrences of FROM with TO.
+ (while (< idx len)
+ (when (= (aref string idx) from)
+ (aset string idx to))
+ (setq idx (1+ idx)))
+ string)))
+ )))
(eval-and-compile
(defalias 'mm-char-or-char-int-p
(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-charset-synonym-alist
+ `((big5 . cn-big5)
+ (gb2312 . cn-gb-2312)
+ (cn-gb . cn-gb-2312)
+ ;; Windows-1252 is actually a superset of Latin-1. See also
+ ;; `gnus-article-dumbquotes-map'.
+ ,(unless (mm-coding-system-p 'windows-1252) ; should be defined eventually
+ '(windows-1252 . iso-8859-1))
+ (x-ctext . ctext))
+ "A mapping from invalid charset names to the real charset names.")
+
(defvar mm-binary-coding-system
(cond
((mm-coding-system-p 'binary) 'binary)
;;; Functions:
(defun mm-mule-charset-to-mime-charset (charset)
- "Return the MIME charset corresponding to MULE CHARSET."
+ "Return the MIME charset corresponding to the given Mule CHARSET."
(let ((alist mm-mime-mule-charset-alist)
out)
(while alist
;; ascii
((eq charset 'us-ascii)
'ascii)
- ;; Check to see whether we can handle this charset.
+ ;; Check to see whether we can handle this charset. (This depends
+ ;; on there being some coding system matching each `mime-charset'
+ ;; coding sysytem property defined, as there should be.)
((memq charset (mm-get-coding-system-list))
charset)
;; Nope.
(t
nil)))
-(if (fboundp 'subst-char-in-string)
- (defsubst mm-replace-chars-in-string (string from to)
- (subst-char-in-string from to string))
- (defun mm-replace-chars-in-string (string from to)
- "Replace characters in STRING from FROM to TO."
- (let ((string (substring string 0)) ;Copy string.
- (len (length string))
- (idx 0))
- ;; Replace all occurrences of FROM with TO.
- (while (< idx len)
- (when (= (aref string idx) from)
- (aset string idx to))
- (setq idx (1+ idx)))
- string)))
+(defsubst mm-replace-chars-in-string (string from to)
+ (mm-subst-char-in-string from to string))
(defsubst mm-enable-multibyte ()
- "Enable multibyte in the current buffer."
- (when (and (fboundp 'set-buffer-multibyte)
- (boundp 'enable-multibyte-characters)
- (default-value 'enable-multibyte-characters))
+ "Set the multibyte flag of the current buffer.
+Only do this if the default value of `enable-multibyte-characters' is
+non-nil. This is a no-op in XEmacs."
+ (when (and (not (featurep 'xemacs))
+ (boundp 'default-enable-multibyte-characters)
+ default-enable-multibyte-characters
+ (fboundp 'set-buffer-multibyte))
(set-buffer-multibyte t)))
(defsubst mm-disable-multibyte ()
- "Disable multibyte in the current buffer."
- (when (fboundp 'set-buffer-multibyte)
+ "Unset the multibyte flag of in the current buffer.
+This is a no-op in XEmacs."
+ (when (and (not (featurep 'xemacs))
+ (fboundp 'set-buffer-multibyte))
(set-buffer-multibyte nil)))
(defsubst mm-enable-multibyte-mule4 ()
"Enable multibyte in the current buffer.
Only used in Emacs Mule 4."
- (when (and (fboundp 'set-buffer-multibyte)
- (boundp 'enable-multibyte-characters)
- (default-value 'enable-multibyte-characters)
+ (when (and (not (featurep 'xemacs))
+ (boundp 'default-enable-multibyte-characters)
+ default-enable-multibyte-characters
+ (fboundp 'set-buffer-multibyte)
+ (fboundp 'charsetp)
(not (charsetp 'eight-bit-control)))
(set-buffer-multibyte t)))
(defsubst mm-disable-multibyte-mule4 ()
"Disable multibyte in the current buffer.
Only used in Emacs Mule 4."
- (when (and (fboundp 'set-buffer-multibyte)
+ (when (and (not (featurep 'xemacs))
+ (fboundp 'set-buffer-multibyte)
+ (fboundp 'charsetp)
(not (charsetp 'eight-bit-control)))
(set-buffer-multibyte nil)))
(defun mm-mime-charset (charset)
"Return the MIME charset corresponding to the MULE CHARSET."
+ (if (eq charset 'unknown)
+ (error "8-bit characters are found in the message, please specify charset."))
(if (and (fboundp 'coding-system-get) (fboundp 'get-charset-property))
;; This exists in Emacs 20.
(or
(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 (or (featurep 'xemacs)
- (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))))))
+Use unibyte mode for this."
+ `(let (default-enable-multibyte-characters)
+ (with-temp-buffer ,@forms)))
(put 'mm-with-unibyte-buffer 'lisp-indent-function 0)
(put 'mm-with-unibyte-buffer 'edebug-form-spec '(body))
(defmacro mm-with-unibyte-current-buffer (&rest forms)
- "Evaluate FORMS there like `progn' in current buffer."
- (let ((multibyte (make-symbol "multibyte")))
- `(if (or (featurep 'xemacs)
- (not (fboundp 'set-buffer-multibyte)))
- (progn
- ,@forms)
- (let ((,multibyte (default-value 'enable-multibyte-characters)))
- (unwind-protect
- (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))
- (set-buffer-multibyte nil)
- (setq-default enable-multibyte-characters nil)
- ,@forms)
- (setq-default enable-multibyte-characters ,multibyte)
- (set-buffer-multibyte ,multibyte))))))
+ "Evaluate FORMS with current current buffer temporarily made unibyte.
+Also bind `default-enable-multibyte-characters' to nil.
+Equivalent to `progn' in XEmacs"
+ (let ((buffer (make-symbol "buffer")))
+ `(if (and (not (featurep 'xemacs))
+ (boundp 'enable-multibyte-characters)
+ enable-multibyte-characters
+ (fboundp 'set-buffer-multibyte))
+ (let ((,buffer (current-buffer)))
+ (unwind-protect
+ (let (default-enable-multibyte-characters)
+ (set-buffer-multibyte nil)
+ ,@forms)
+ (set-buffer ,buffer)
+ (set-buffer-multibyte t)))
+ (let (default-enable-multibyte-characters)
+ ,@forms))))
(put 'mm-with-unibyte-current-buffer 'lisp-indent-function 0)
(put 'mm-with-unibyte-current-buffer 'edebug-form-spec '(body))
(defmacro mm-with-unibyte-current-buffer-mule4 (&rest forms)
"Evaluate FORMS there like `progn' in current buffer.
Mule4 only."
- (let ((multibyte (make-symbol "multibyte")))
- `(if (or (featurep 'xemacs)
- (not (fboundp 'set-buffer-multibyte))
- (charsetp 'eight-bit-control)) ;; For Emacs Mule 4 only.
- (progn
- ,@forms)
- (let ((,multibyte (default-value 'enable-multibyte-characters)))
+ (let ((buffer (make-symbol "buffer")))
+ `(if (and (not (featurep 'xemacs))
+ (boundp 'enable-multibyte-characters)
+ enable-multibyte-characters
+ (fboundp 'set-buffer-multibyte)
+ (fboundp 'charsetp)
+ (not (charsetp 'eight-bit-control))) ;; For Emacs Mule 4 only.
+ (let ((,buffer (current-buffer)))
(unwind-protect
- (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))
+ (let (default-enable-multibyte-characters)
(set-buffer-multibyte nil)
- (setq-default enable-multibyte-characters nil)
,@forms)
- (setq-default enable-multibyte-characters ,multibyte)
- (set-buffer-multibyte ,multibyte))))))
+ (set-buffer ,buffer)
+ (set-buffer-multibyte t)))
+ (let (default-enable-multibyte-characters)
+ ,@forms))))
(put 'mm-with-unibyte-current-buffer-mule4 'lisp-indent-function 0)
(put 'mm-with-unibyte-current-buffer-mule4 'edebug-form-spec '(body))
(defmacro mm-with-unibyte (&rest forms)
- "Set default `enable-multibyte-characters' to `nil', eval the FORMS."
- (let ((multibyte (make-symbol "multibyte")))
- `(if (or (featurep 'xemacs)
- (not (boundp 'enable-multibyte-characters)))
- (progn ,@forms)
- (let ((,multibyte (default-value 'enable-multibyte-characters)))
- (unwind-protect
- (progn
- (setq-default enable-multibyte-characters nil)
- ,@forms)
- (setq-default enable-multibyte-characters ,multibyte))))))
+ "Eval the FORMS with the default value of `enable-multibyte-characters' nil, ."
+ `(let (default-enable-multibyte-characters)
+ ,@forms))
(put 'mm-with-unibyte 'lisp-indent-function 0)
(put 'mm-with-unibyte 'edebug-form-spec '(body))
(defun mm-find-charset-region (b e)
- "Return a list of charsets in the region."
+ "Return a list of Emacs charsets in the region B to E."
(cond
((and (mm-multibyte-p)
(fboundp 'find-charset-region))
;; Remove composition since the base charsets have been included.
- (delq 'composition (find-charset-region b e)))
+ ;; Remove eight-bit-*, treat them as ascii.
+ (let ((css (find-charset-region b e)))
+ (mapcar (lambda (cs) (setq css (delq cs css)))
+ '(composition eight-bit-control eight-bit-graphic))
+ css))
(t
;; We are in a unibyte buffer or XEmacs non-mule, so we futz around a bit.
(save-excursion
inhibit-file-name-handlers)))
(write-region start end filename append visit lockname)))
+(defun mm-image-load-path (&optional package)
+ (let (dir result)
+ (dolist (path load-path (nreverse result))
+ (if (file-directory-p
+ (setq dir (concat (file-name-directory
+ (directory-file-name path))
+ "etc/" (or package "gnus/"))))
+ (push dir result))
+ (push path result))))
+
(provide 'mm-util)
;;; mm-util.el ends here
projects / gnus / blobdiff