-;;; mm-util.el --- Utility functions for MIME things
-;; Copyright (C) 1998,99 Free Software Foundation, Inc.
+;;; mm-util.el --- Utility functions for Mule and low level things
+;; Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
;;; Code:
+(eval-when-compile (require 'cl))
(require 'mail-prsvr)
-(defvar mm-mime-mule-charset-alist
- '((us-ascii ascii)
- (iso-8859-1 latin-iso8859-1)
- (iso-8859-2 latin-iso8859-2)
- (iso-8859-3 latin-iso8859-3)
- (iso-8859-4 latin-iso8859-4)
- (iso-8859-5 cyrillic-iso8859-5)
- (koi8-r cyrillic-iso8859-5)
- (iso-8859-6 arabic-iso8859-6)
- (iso-8859-7 greek-iso8859-7)
- (iso-8859-8 hebrew-iso8859-8)
- (iso-8859-9 latin-iso8859-9)
- (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
- katakana-jisx0201)
- (iso-2022-int-1 latin-iso8859-1 greek-iso8859-7
- latin-jisx0201 japanese-jisx0208-1978
- chinese-gb2312 japanese-jisx0208
- korean-ksc5601 japanese-jisx0212
- chinese-cns11643-1 chinese-cns11643-2)
- (iso-2022-int-1 latin-iso8859-1 latin-iso8859-2
- cyrillic-iso8859-5 greek-iso8859-7
- latin-jisx0201 japanese-jisx0208-1978
- chinese-gb2312 japanese-jisx0208
- korean-ksc5601 japanese-jisx0212
- chinese-cns11643-1 chinese-cns11643-2
- chinese-cns11643-3 chinese-cns11643-4
- chinese-cns11643-5 chinese-cns11643-6
- chinese-cns11643-7))
- "Alist of MIME-charset/MULE-charsets.")
-
(eval-and-compile
(mapcar
(lambda (elem)
(make-char
. (lambda (charset int)
(int-to-char int)))
- (read-coding-system
+ (read-charset
. (lambda (prompt)
+ "Return a charset."
+ (intern
+ (completing-read
+ prompt
+ (mapcar (lambda (e) (list (symbol-name (car e))))
+ mm-mime-mule-charset-alist)
+ 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)))
+ (string-as-unibyte . identity)
+ (string-as-multibyte . identity)
+ (multibyte-string-p . ignore))))
+
+(eval-and-compile
+ (defalias 'mm-char-or-char-int-p
+ (cond
+ ((fboundp 'char-or-char-int-p) 'char-or-char-int-p)
+ ((fboundp 'char-valid-p) 'char-valid-p)
+ (t 'identity))))
+
+(eval-and-compile
+ (defalias 'mm-read-coding-system
+ (cond
+ ((fboundp 'read-coding-system)
+ (if (and (featurep 'xemacs)
+ (<= (string-to-number emacs-version) 21.1))
+ (lambda (prompt &optional default-coding-system)
+ (read-coding-system prompt))
+ 'read-coding-system))
+ (t (lambda (prompt &optional default-coding-system)
"Prompt the user for a coding system."
(completing-read
prompt (mapcar (lambda (s) (list (symbol-name (car s))))
(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
+ `(
+ ;; Perfectly fine? A valid MIME name, anyhow.
+ ,@(unless (mm-coding-system-p 'big5)
+ '((big5 . cn-big5)))
+ ;; Not in XEmacs, but it's not a proper MIME charset anyhow.
+ ,@(unless (mm-coding-system-p 'x-ctext)
+ '((x-ctext . ctext)))
+ ;; Apparently not defined in Emacs 20, but is a valid MIME name.
+ ,@(unless (mm-coding-system-p 'gb2312)
+ '((gb2312 . cn-gb-2312)))
+ ;; ISO-8859-15 is very similar to ISO-8859-1.
+ ,@(unless (mm-coding-system-p 'iso-8859-15) ; Emacs 21 defines it.
+ '((iso-8859-15 . iso-8859-1)))
+ ;; Windows-1252 is actually a superset of Latin-1. See also
+ ;; `gnus-article-dumbquotes-map'.
+ ,@(unless (mm-coding-system-p 'windows-1252)
+ (if (mm-coding-system-p 'cp1252)
+ '((windows-1252 . cp1252))
+ '((windows-1252 . iso-8859-1))))
+ ;; Windows-1250 is a variant of Latin-2 heavily used by Microsoft
+ ;; Outlook users in Czech republic. Use this to allow reading of their
+ ;; e-mails. cp1250 should be defined by M-x codepage-setup.
+ ,@(if (and (not (mm-coding-system-p 'windows-1250))
+ (mm-coding-system-p 'cp1250))
+ '((windows-1250 . cp1250)))
+ )
+ "A mapping from invalid charset names to the real charset names.")
+
(defvar mm-binary-coding-system
- (cond
+ (cond
((mm-coding-system-p 'binary) 'binary)
((mm-coding-system-p 'no-conversion) 'no-conversion)
(t nil))
"Text coding system for write.")
(defvar mm-auto-save-coding-system
- (cond
+ (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)
+ (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.")
+(defvar mm-universal-coding-system mm-auto-save-coding-system
+ "The universal coding system.")
+
+;; Fixme: some of the cars here aren't valid MIME charsets. That
+;; should only matter with XEmacs, though.
+(defvar mm-mime-mule-charset-alist
+ `((us-ascii ascii)
+ (iso-8859-1 latin-iso8859-1)
+ (iso-8859-2 latin-iso8859-2)
+ (iso-8859-3 latin-iso8859-3)
+ (iso-8859-4 latin-iso8859-4)
+ (iso-8859-5 cyrillic-iso8859-5)
+ ;; Non-mule (X)Emacs uses the last mule-charset for 8bit characters.
+ ;; The fake mule-charset, gnus-koi8-r, tells Gnus that the default
+ ;; charset is koi8-r, not iso-8859-5.
+ (koi8-r cyrillic-iso8859-5 gnus-koi8-r)
+ (iso-8859-6 arabic-iso8859-6)
+ (iso-8859-7 greek-iso8859-7)
+ (iso-8859-8 hebrew-iso8859-8)
+ (iso-8859-9 latin-iso8859-9)
+ (iso-8859-14 latin-iso8859-14)
+ (iso-8859-15 latin-iso8859-15)
+ (viscii vietnamese-viscii-lower)
+ (iso-2022-jp latin-jisx0201 japanese-jisx0208 japanese-jisx0208-1978)
+ (euc-kr korean-ksc5601)
+ (gb2312 chinese-gb2312)
+ (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
+ katakana-jisx0201)
+ (iso-2022-int-1 latin-iso8859-1 greek-iso8859-7
+ latin-jisx0201 japanese-jisx0208-1978
+ chinese-gb2312 japanese-jisx0208
+ korean-ksc5601 japanese-jisx0212
+ chinese-cns11643-1 chinese-cns11643-2)
+ (iso-2022-int-1 latin-iso8859-1 latin-iso8859-2
+ cyrillic-iso8859-5 greek-iso8859-7
+ latin-jisx0201 japanese-jisx0208-1978
+ chinese-gb2312 japanese-jisx0208
+ korean-ksc5601 japanese-jisx0212
+ chinese-cns11643-1 chinese-cns11643-2
+ chinese-cns11643-3 chinese-cns11643-4
+ chinese-cns11643-5 chinese-cns11643-6
+ chinese-cns11643-7)
+ ,(if (or (not (fboundp 'charsetp)) ;; non-Mule case
+ (charsetp 'unicode-a)
+ (not (mm-coding-system-p 'mule-utf-8)))
+ '(utf-8 unicode-a unicode-b unicode-c unicode-d unicode-e)
+ ;; If we have utf-8 we're in Mule 5+.
+ (append '(utf-8)
+ (delete 'ascii
+ (coding-system-get 'mule-utf-8 'safe-charsets)))))
+ "Alist of MIME-charset/MULE-charsets.")
+
+;; Correct by construction, but should be unnecessary:
+;; XEmacs hates it.
+(when (and (not (featurep 'xemacs))
+ (fboundp 'coding-system-list)
+ (fboundp 'sort-coding-systems))
+ (setq mm-mime-mule-charset-alist
+ (apply
+ 'nconc
+ (mapcar
+ (lambda (cs)
+ (when (and (coding-system-get cs 'mime-charset)
+ (not (eq t (coding-system-get cs 'safe-charsets))))
+ (list (cons (coding-system-get cs 'mime-charset)
+ (delq 'ascii
+ (coding-system-get cs 'safe-charsets))))))
+ (sort-coding-systems (coding-system-list 'base-only))))))
+
+(defvar mm-hack-charsets '(iso-8859-15 iso-2022-jp-2)
+ "A list of special charsets.
+Valid elements include:
+`iso-8859-15' convert ISO-8859-1, -9 to ISO-8859-15 if ISO-8859-15 exists.
+`iso-2022-jp-2' convert ISO-2022-jp to ISO-2022-jp-2 if ISO-2022-jp-2 exists."
+)
+
+(defvar mm-iso-8859-15-compatible
+ '((iso-8859-1 "\xA4\xA6\xA8\xB4\xB8\xBC\xBD\xBE")
+ (iso-8859-9 "\xA4\xA6\xA8\xB4\xB8\xBC\xBD\xBE\xD0\xDD\xDE\xF0\xFD\xFE"))
+ "ISO-8859-15 exchangeable coding systems and inconvertible characters.")
+
+(defvar mm-iso-8859-x-to-15-table
+ (and (fboundp 'coding-system-p)
+ (mm-coding-system-p 'iso-8859-15)
+ (mapcar
+ (lambda (cs)
+ (if (mm-coding-system-p (car cs))
+ (let ((c (string-to-char
+ (decode-coding-string "\341" (car cs)))))
+ (cons (char-charset c)
+ (cons
+ (- (string-to-char
+ (decode-coding-string "\341" 'iso-8859-15)) c)
+ (string-to-list (decode-coding-string (car (cdr cs))
+ (car cs))))))
+ '(gnus-charset 0)))
+ mm-iso-8859-15-compatible))
+ "A table of the difference character between ISO-8859-X and ISO-8859-15.")
+
+(defvar mm-coding-system-priorities nil
+ "Preferred coding systems for encoding outgoing mails.
+
+More than one suitable coding systems may be found for some texts. By
+default, a coding system with the highest priority is used to encode
+outgoing mails (see `sort-coding-systems'). If this variable is set,
+it overrides the default priority. For example, Japanese users may
+prefer iso-2022-jp to japanese-shift-jis:
+
+\(setq mm-coding-system-priorities
+ '(iso-2022-jp iso-2022-jp-2 japanese-shift-jis utf-8))
+")
+
+(defvar mm-use-find-coding-systems-region
+ (fboundp 'find-coding-systems-region)
+ "Use `find-coding-systems-region' to find proper coding systems.")
+
;;; Internal variables:
;;; Functions:
(defun mm-mule-charset-to-mime-charset (charset)
- "Return the MIME charset corresponding to MULE CHARSET."
- (let ((alist mm-mime-mule-charset-alist)
- out)
- (while alist
- (when (memq charset (cdar alist))
- (setq out (caar alist)
- alist nil))
- (pop alist))
- out))
+ "Return the MIME charset corresponding to the given Mule CHARSET."
+ (if (fboundp 'find-coding-systems-for-charsets)
+ (let (mime)
+ (dolist (cs (find-coding-systems-for-charsets (list charset)))
+ (unless mime
+ (when cs
+ (setq mime (coding-system-get cs 'mime-charset)))))
+ mime)
+ (let ((alist mm-mime-mule-charset-alist)
+ out)
+ (while alist
+ (when (memq charset (cdar alist))
+ (setq out (caar alist)
+ alist nil))
+ (pop alist))
+ out)))
(defun mm-charset-to-coding-system (charset &optional lbt)
"Return coding-system corresponding to CHARSET.
used as the line break code type of the coding system."
(when (stringp charset)
(setq charset (intern (downcase charset))))
- (setq charset
- (or (cdr (assq charset mm-charset-synonym-alist))
- charset))
(when lbt
(setq charset (intern (format "%s-%s" charset lbt))))
(cond
+ ((null charset)
+ charset)
;; Running in a non-MULE environment.
((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-get-coding-system-list))
+ ;; Check to see whether we can handle this charset. (This depends
+ ;; on there being some coding system matching each `mime-charset'
+ ;; property defined, as there should be.)
+ ((and (mm-coding-system-p charset)
+;;; Doing this would potentially weed out incorrect charsets.
+;;; charset
+;;; (eq charset (coding-system-get charset 'mime-charset))
+ )
charset)
- ;; Nope.
- (t
- nil)))
-
-(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-enable-multibyte ()
- "Enable multibyte in the current buffer."
- (when (and (fboundp 'set-buffer-multibyte)
- (boundp 'enable-multibyte-characters)
- (default-value 'enable-multibyte-characters))
- (set-buffer-multibyte t)))
-
-(defsubst mm-disable-multibyte ()
- "Disable multibyte in the current buffer."
- (when (fboundp 'set-buffer-multibyte)
- (set-buffer-multibyte nil)))
+ ;; Translate invalid charsets.
+ ((let ((cs (cdr (assq charset mm-charset-synonym-alist))))
+ (and cs (mm-coding-system-p cs) cs)))
+ ;; Last resort: search the coding system list for entries which
+ ;; have the right mime-charset in case the canonical name isn't
+ ;; defined (though it should be).
+ ((let (cs)
+ ;; mm-get-coding-system-list returns a list of cs without lbt.
+ ;; Do we need -lbt?
+ (dolist (c (mm-get-coding-system-list))
+ (if (and (null cs)
+ (eq charset (coding-system-get c 'mime-charset)))
+ (setq cs c)))
+ cs))))
+
+(defsubst mm-replace-chars-in-string (string from to)
+ (mm-subst-char-in-string from to string))
+
+(eval-and-compile
+ (defvar mm-emacs-mule (and (not (featurep 'xemacs))
+ (boundp 'default-enable-multibyte-characters)
+ default-enable-multibyte-characters
+ (fboundp 'set-buffer-multibyte))
+ "Emacs mule.")
+
+ (defvar mm-mule4-p (and mm-emacs-mule
+ (fboundp 'charsetp)
+ (not (charsetp 'eight-bit-control)))
+ "Mule version 4.")
+
+ (if mm-emacs-mule
+ (defun mm-enable-multibyte ()
+ "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."
+ (set-buffer-multibyte t))
+ (defalias 'mm-enable-multibyte 'ignore))
+
+ (if mm-emacs-mule
+ (defun mm-disable-multibyte ()
+ "Unset the multibyte flag of in the current buffer.
+This is a no-op in XEmacs."
+ (set-buffer-multibyte nil))
+ (defalias 'mm-disable-multibyte 'ignore))
+
+ (if mm-mule4-p
+ (defun mm-enable-multibyte-mule4 ()
+ "Enable multibyte in the current buffer.
+Only used in Emacs Mule 4."
+ (set-buffer-multibyte t))
+ (defalias 'mm-enable-multibyte-mule4 'ignore))
+
+ (if mm-mule4-p
+ (defun mm-disable-multibyte-mule4 ()
+ "Disable multibyte in the current buffer.
+Only used in Emacs Mule 4."
+ (set-buffer-multibyte nil))
+ (defalias 'mm-disable-multibyte-mule4 'ignore)))
(defun mm-preferred-coding-system (charset)
;; A typo in some Emacs versions.
- (or (get-charset-property charset 'prefered-coding-system)
- (get-charset-property charset 'preferred-coding-system)))
+ (or (get-charset-property charset 'preferred-coding-system)
+ (get-charset-property charset 'prefered-coding-system)))
+
+(defsubst mm-guess-charset ()
+ "Guess Mule charset from the language environment."
+ (or
+ mail-parse-mule-charset ;; cached mule-charset
+ (progn
+ (setq mail-parse-mule-charset
+ (and (boundp 'current-language-environment)
+ (car (last
+ (assq 'charset
+ (assoc current-language-environment
+ language-info-alist))))))
+ (if (or (not mail-parse-mule-charset)
+ (eq mail-parse-mule-charset 'ascii))
+ (setq mail-parse-mule-charset
+ (or (car (last (assq mail-parse-charset
+ mm-mime-mule-charset-alist)))
+ ;; default
+ 'latin-iso8859-1)))
+ mail-parse-mule-charset)))
(defun mm-charset-after (&optional pos)
"Return charset of a character in current buffer at position POS.
If POS is nil, it defauls to the current point.
If POS is out of range, the value is nil.
If the charset is `composition', return the actual one."
- (let ((charset (cond
- ((fboundp 'charset-after)
- (charset-after pos))
- ((fboundp 'char-charset)
- (char-charset (char-after pos)))
- ((< (mm-char-int (char-after pos)) 128)
- 'ascii)
- (mail-parse-mule-charset ;; cached mule-charset
- mail-parse-mule-charset)
- ((boundp 'current-language-environment)
- (let ((entry (assoc current-language-environment
- language-info-alist)))
- (setq mail-parse-mule-charset
- (or (car (last (assq 'charset entry)))
- 'latin-iso8859-1))))
- (t ;; figure out the charset
- (setq mail-parse-mule-charset
- (or (car (last (assq mail-parse-charset
- mm-mime-mule-charset-alist)))
- 'latin-iso8859-1))))))
- (if (eq charset 'composition)
- (let ((p (or pos (point))))
- (cadr (find-charset-region p (1+ p))))
- charset)))
+ (let ((char (char-after pos)) charset)
+ (if (< (mm-char-int char) 128)
+ (setq charset 'ascii)
+ ;; charset-after is fake in some Emacsen.
+ (setq charset (and (fboundp 'char-charset) (char-charset char)))
+ (if (eq charset 'composition)
+ (let ((p (or pos (point))))
+ (cadr (find-charset-region p (1+ p))))
+ (if (and charset (not (memq charset '(ascii eight-bit-control
+ eight-bit-graphic))))
+ charset
+ (mm-guess-charset))))))
(defun mm-mime-charset (charset)
- "Return the MIME charset corresponding to the MULE CHARSET."
- (if (fboundp 'coding-system-get)
+ "Return the MIME charset corresponding to the given Mule CHARSET."
+ (if (eq charset 'unknown)
+ (error "The message contains non-printable characters, please use attachment"))
+ (if (and (fboundp 'coding-system-get) (fboundp 'get-charset-property))
;; This exists in Emacs 20.
(or
(and (mm-preferred-coding-system charset)
(setq result (cons head result)))
(nreverse result)))
-(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)))
- (setq charsets (mm-delete-duplicates charsets))
- (if (and (> (length charsets) 1)
- (fboundp 'find-coding-systems-region)
- (memq 'utf-8 (find-coding-systems-region b e)))
- '(utf-8)
- charsets)))
-
-(defsubst mm-multibyte-p ()
- "Say whether multibyte is enabled."
- (or (string-match "XEmacs\\|Lucid" emacs-version)
- (and (boundp 'enable-multibyte-characters)
- enable-multibyte-characters)))
+(if (and (not (featurep 'xemacs))
+ (boundp 'enable-multibyte-characters))
+ (defalias 'mm-multibyte-p
+ (lambda ()
+ "Say whether multibyte is enabled in the current buffer."
+ enable-multibyte-characters))
+ (defalias 'mm-multibyte-p (lambda () (featurep 'mule))))
+
+(defun mm-iso-8859-x-to-15-region (&optional b e)
+ (if (fboundp 'char-charset)
+ (let (charset item c inconvertible)
+ (save-restriction
+ (if e (narrow-to-region b e))
+ (goto-char (point-min))
+ (skip-chars-forward "\0-\177")
+ (while (not (eobp))
+ (cond
+ ((not (setq item (assq (char-charset (setq c (char-after)))
+ mm-iso-8859-x-to-15-table)))
+ (forward-char))
+ ((memq c (cdr (cdr item)))
+ (setq inconvertible t)
+ (forward-char))
+ (t
+ (insert-before-markers (prog1 (+ c (car (cdr item)))
+ (delete-char 1))))
+ (skip-chars-forward "\0-\177"))))
+ (not inconvertible))))
+
+(defun mm-sort-coding-systems-predicate (a b)
+ (> (length (memq a mm-coding-system-priorities))
+ (length (memq b mm-coding-system-priorities))))
+
+(defun mm-find-mime-charset-region (b e &optional hack-charsets)
+ "Return the MIME charsets needed to encode the region between B and E.
+nil means ASCII, a single-element list represents an appropriate MIME
+charset, and a longer list means no appropriate charset."
+ (let (charsets)
+ ;; The return possibilities of this function are a mess...
+ (or (and (mm-multibyte-p)
+ mm-use-find-coding-systems-region
+ ;; Find the mime-charset of the most preferred coding
+ ;; system that has one.
+ (let ((systems (find-coding-systems-region b e)))
+ (when mm-coding-system-priorities
+ (setq systems
+ (sort systems 'mm-sort-coding-systems-predicate)))
+ ;; Fixme: The `mime-charset' (`x-ctext') of `compound-text'
+ ;; is not in the IANA list.
+ (setq systems (delq 'compound-text systems))
+ (unless (equal systems '(undecided))
+ (while systems
+ (let ((cs (coding-system-get (pop systems) 'mime-charset)))
+ (if cs
+ (setq systems nil
+ charsets (list cs))))))
+ charsets))
+ ;; Otherwise we're not multibyte, XEmacs or a single coding
+ ;; system won't cover it.
+ (setq charsets
+ (mm-delete-duplicates
+ (mapcar 'mm-mime-charset
+ (delq 'ascii
+ (mm-find-charset-region b e))))))
+ (if (and (memq 'iso-8859-15 charsets)
+ (memq 'iso-8859-15 hack-charsets)
+ (save-excursion (mm-iso-8859-x-to-15-region b e)))
+ (mapcar (lambda (x) (setq charsets (delq (car x) charsets)))
+ mm-iso-8859-15-compatible))
+ (if (and (memq 'iso-2022-jp-2 charsets)
+ (memq 'iso-2022-jp-2 hack-charsets))
+ (setq charsets (delq 'iso-2022-jp charsets)))
+ charsets))
(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 (string-match "XEmacs\\|Lucid" emacs-version)
- (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 (string-match "XEmacs\\|Lucid" emacs-version)
- (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)
- ,@forms)
- (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 ((multibyte (make-symbol "multibyte"))
+ (buffer (make-symbol "buffer")))
+ `(if mm-emacs-mule
+ (let ((,multibyte enable-multibyte-characters)
+ (,buffer (current-buffer)))
+ (unwind-protect
+ (let (default-enable-multibyte-characters)
+ (set-buffer-multibyte nil)
+ ,@forms)
+ (set-buffer ,buffer)
+ (set-buffer-multibyte ,multibyte)))
+ (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"))
+ (buffer (make-symbol "buffer")))
+ `(if mm-mule4-p
+ (let ((,multibyte enable-multibyte-characters)
+ (,buffer (current-buffer)))
+ (unwind-protect
+ (let (default-enable-multibyte-characters)
+ (set-buffer-multibyte nil)
+ ,@forms)
+ (set-buffer ,buffer)
+ (set-buffer-multibyte ,multibyte)))
+ (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 (string-match "XEmacs\\|Lucid" emacs-version)
- (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))
+ (fboundp 'find-charset-region))
;; Remove composition since the base charsets have been included.
- (delq 'composition (find-charset-region b e)))
- ((not (boundp 'current-language-environment))
+ ;; 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
+ control-1))
+ css))
+ (t
+ ;; We are in a unibyte buffer or XEmacs non-mule, so we futz around a bit.
(save-excursion
(save-restriction
(narrow-to-region b e)
(skip-chars-forward "\0-\177")
(if (eobp)
'(ascii)
- (delq nil (list 'ascii
- (or (car (last (assq mail-parse-charset
- mm-mime-mule-charset-alist)))
- '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 current-language-environment
- language-info-alist)))
- (skip-chars-forward "\0-\177")
- (if (eobp)
- '(ascii)
- (delq nil (list 'ascii
- (or (car (last (assq 'charset entry)))
- 'latin-iso8859-1))))))))))
-
-(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 "[]*[;!'`\"$\\& \t{} |()<>]" arg pos))
- (push (substring arg pos new-pos) accum)
- (push "\\" accum)
- (push (list (aref arg new-pos)) accum)
- (setq pos (1+ new-pos)))
- (if (= pos 0)
- arg
- (apply 'concat (nconc (nreverse accum) (list (substring arg pos)))))))
+ (let (charset)
+ (setq charset
+ (and (boundp 'current-language-environment)
+ (car (last (assq 'charset
+ (assoc current-language-environment
+ language-info-alist))))))
+ (if (eq charset 'ascii) (setq charset nil))
+ (or charset
+ (setq charset
+ (car (last (assq mail-parse-charset
+ mm-mime-mule-charset-alist)))))
+ (list 'ascii (or charset 'latin-iso8859-1)))))))))
+
+(if (fboundp 'shell-quote-argument)
+ (defalias 'mm-quote-arg 'shell-quote-argument)
+ (defun mm-quote-arg (arg)
+ "Return a version of ARG that is safe to evaluate in a shell."
+ (let ((pos 0) new-pos accum)
+ ;; *** bug: we don't handle newline characters properly
+ (while (setq new-pos (string-match "[]*[;!'`\"$\\& \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."
(nreverse out)))
(defvar mm-inhibit-file-name-handlers
- '(jka-compr-handler)
+ '(jka-compr-handler image-file-handler)
"A list of handlers doing (un)compression (etc) thingies.")
(defun mm-insert-file-contents (filename &optional visit beg end replace
(auto-mode-alist (if inhibit nil (mm-auto-mode-alist)))
(default-major-mode 'fundamental-mode)
(enable-local-variables nil)
- (after-insert-file-functions nil)
+ (after-insert-file-functions nil)
(enable-local-eval nil)
(find-file-hooks nil)
- (inhibit-file-name-operation (if inhibit
+ (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
+ (append mm-inhibit-file-name-handlers
inhibit-file-name-handlers)
inhibit-file-name-handlers)))
(insert-file-contents filename visit beg end replace)))
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
+ (let ((coding-system-for-write
+ (or codesys mm-text-coding-system-for-write
mm-text-coding-system))
- (inhibit-file-name-operation (if inhibit
+ (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
+ (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
+(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
+ (let ((coding-system-for-write
+ (or coding-system mm-text-coding-system-for-write
mm-text-coding-system))
- (inhibit-file-name-operation (if inhibit
+ (inhibit-file-name-operation (if inhibit
'write-region
inhibit-file-name-operation))
(inhibit-file-name-handlers
(if inhibit
- (append mm-inhibit-file-name-handlers
+ (append mm-inhibit-file-name-handlers
inhibit-file-name-handlers)
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))))
+
+(if (fboundp 'detect-coding-region)
+ (defun mm-detect-coding-region (start end)
+ "Like 'detect-coding-region' except returning the best one."
+ (let ((coding-systems
+ (detect-coding-region (point) (point-max))))
+ (or (car-safe coding-systems)
+ coding-systems)))
+ (defun mm-detect-coding-region (start end)
+ (let ((point (point)))
+ (goto-char start)
+ (skip-chars-forward "\0-\177" end)
+ (prog1
+ (if (eq (point) end) 'ascii (mm-guess-charset))
+ (goto-char point)))))
+
+(if (fboundp 'coding-system-get)
+ (defun mm-detect-mime-charset-region (start end)
+ "Detect MIME charset of the text in the region between START and END."
+ (let ((cs (mm-detect-coding-region start end)))
+ (coding-system-get cs 'mime-charset)))
+ (defun mm-detect-mime-charset-region (start end)
+ "Detect MIME charset of the text in the region between START and END."
+ (let ((cs (mm-detect-coding-region start end)))
+ cs)))
+
(provide 'mm-util)
;;; mm-util.el ends here
projects / elisp / gnus.git- / blobdiff