mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-26 10:49:33 +00:00
aa0a8561bb
Merge from gnus--rel--5.10 Patches applied: * miles@gnu.org--gnu-2004/gnus--rel--5.10--patch-78 Merge from emacs--cvs-trunk--0 * miles@gnu.org--gnu-2004/gnus--rel--5.10--patch-79 - miles@gnu.org--gnu-2004/gnus--rel--5.10--patch-80 Update from CVS 2004-12-22 Katsumi Yamaoka <yamaoka@jpl.org> * lisp/gnus/gnus-spec.el (gnus-spec-tab): Make a Lisp form which works correctly even if there are wide characters. 2004-12-21 Katsumi Yamaoka <yamaoka@jpl.org> * lisp/gnus/rfc2231.el (rfc2231-parse-string): Decode encoded value after concatenating segments rather than before concatenating them. Suggested by ARISAWA Akihiro <ari@mbf.ocn.ne.jp>. 2004-12-17 Katsumi Yamaoka <yamaoka@jpl.org> * lisp/gnus/mm-util.el (mm-xemacs-find-mime-charset): New macro. 2004-12-17 Aidan Kehoe <kehoea@parhasard.net> * lisp/gnus/mm-util.el (mm-xemacs-find-mime-charset-1): New function used to unify Latin characters in XEmacs. (mm-find-mime-charset-region): Use it. 2004-12-17 Katsumi Yamaoka <yamaoka@jpl.org> * lisp/gnus/gnus-util.el (gnus-delete-directory): New function. * lisp/gnus/gnus-agent.el (gnus-agent-delete-group): Use it. * lisp/gnus/gnus-cache.el (gnus-cache-delete-group): Use it.
939 lines
34 KiB
EmacsLisp
939 lines
34 KiB
EmacsLisp
;;; mm-util.el --- Utility functions for Mule and low level things
|
|
;; Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004
|
|
;; Free Software Foundation, Inc.
|
|
|
|
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
|
|
;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
|
|
;; This file is part of GNU Emacs.
|
|
|
|
;; GNU Emacs is free software; you can redistribute it and/or modify
|
|
;; it under the terms of the GNU General Public License as published by
|
|
;; the Free Software Foundation; either version 2, or (at your option)
|
|
;; any later version.
|
|
|
|
;; GNU Emacs is distributed in the hope that it will be useful,
|
|
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
;; GNU General Public License for more details.
|
|
|
|
;; You should have received a copy of the GNU General Public License
|
|
;; along with GNU Emacs; see the file COPYING. If not, write to the
|
|
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
;; Boston, MA 02111-1307, USA.
|
|
|
|
;;; Commentary:
|
|
|
|
;;; Code:
|
|
|
|
(eval-when-compile (require 'cl))
|
|
(require 'mail-prsvr)
|
|
|
|
(eval-and-compile
|
|
(mapcar
|
|
(lambda (elem)
|
|
(let ((nfunc (intern (format "mm-%s" (car elem)))))
|
|
(if (fboundp (car 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)
|
|
(coding-system-list . ignore)
|
|
(decode-coding-region . ignore)
|
|
(char-int . identity)
|
|
(coding-system-equal . equal)
|
|
(annotationp . ignore)
|
|
(set-buffer-file-coding-system . ignore)
|
|
(make-char
|
|
. (lambda (charset int)
|
|
(int-to-char int)))
|
|
(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-make-unibyte . identity)
|
|
(string-as-multibyte . identity)
|
|
(multibyte-string-p . ignore)
|
|
;; It is not a MIME function, but some MIME functions use it.
|
|
(make-temp-file . (lambda (prefix &optional dir-flag)
|
|
(let ((file (expand-file-name
|
|
(make-temp-name prefix)
|
|
(if (fboundp 'temp-directory)
|
|
(temp-directory)
|
|
temporary-file-directory))))
|
|
(if dir-flag
|
|
(make-directory file))
|
|
file)))
|
|
(insert-byte . insert-char)
|
|
(multibyte-char-to-unibyte . identity))))
|
|
|
|
(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))))
|
|
|
|
;; Fixme: This seems always to be used to read a MIME charset, so it
|
|
;; should be re-named and fixed (in Emacs) to offer completion only on
|
|
;; proper charset names (base coding systems which have a
|
|
;; mime-charset defined). XEmacs doesn't believe in mime-charset;
|
|
;; test with
|
|
;; `(or (coding-system-get 'iso-8859-1 'mime-charset)
|
|
;; (coding-system-get 'iso-8859-1 :mime-charset))'
|
|
;; Actually, there should be an `mm-coding-system-mime-charset'.
|
|
(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))))
|
|
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))))
|
|
|
|
(defun mm-coding-system-p (cs)
|
|
"Return non-nil if CS is a symbol naming a coding system.
|
|
In XEmacs, also return non-nil if CS is a coding system object.
|
|
If CS is available, return CS itself in Emacs, and return a coding
|
|
system object in XEmacs."
|
|
(if (fboundp 'find-coding-system)
|
|
(find-coding-system cs)
|
|
(if (fboundp 'coding-system-p)
|
|
(when (coding-system-p cs)
|
|
cs)
|
|
;; Is this branch ever actually useful?
|
|
(car (memq cs (mm-get-coding-system-list))))))
|
|
|
|
(defvar mm-charset-synonym-alist
|
|
`(
|
|
;; Not in XEmacs, but it's not a proper MIME charset anyhow.
|
|
,@(unless (mm-coding-system-p 'x-ctext)
|
|
'((x-ctext . ctext)))
|
|
;; ISO-8859-15 is very similar to ISO-8859-1. But it's _different_!
|
|
,@(unless (mm-coding-system-p 'iso-8859-15)
|
|
'((iso-8859-15 . iso-8859-1)))
|
|
;; BIG-5HKSCS is similar to, but different than, BIG-5.
|
|
,@(unless (mm-coding-system-p 'big5-hkscs)
|
|
'((big5-hkscs . big5)))
|
|
;; 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
|
|
((mm-coding-system-p 'binary) 'binary)
|
|
((mm-coding-system-p 'no-conversion) 'no-conversion)
|
|
(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 'utf-8-emacs) ; Mule 7
|
|
(if (memq system-type '(windows-nt ms-dos ms-windows))
|
|
(if (mm-coding-system-p 'utf-8-emacs-dos)
|
|
'utf-8-emacs-dos mm-binary-coding-system)
|
|
'utf-8-emacs))
|
|
((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.")
|
|
|
|
(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)
|
|
(windows-1251 cyrillic-iso8859-5)
|
|
(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)
|
|
(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)
|
|
(iso-2022-jp-3 latin-jisx0201 japanese-jisx0208-1978 japanese-jisx0208
|
|
japanese-jisx0213-1 japanese-jisx0213-2)
|
|
(shift_jis latin-jisx0201 katakana-jisx0201 japanese-jisx0208)
|
|
,(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.")
|
|
|
|
(defun mm-enrich-utf-8-by-mule-ucs ()
|
|
"Make the `utf-8' MIME charset usable by the Mule-UCS package.
|
|
This function will run when the `un-define' module is loaded under
|
|
XEmacs, and fill the `utf-8' entry in `mm-mime-mule-charset-alist'
|
|
with Mule charsets. It is completely useless for Emacs."
|
|
(unless (cdr (delete '(mm-enrich-utf-8-by-mule-ucs)
|
|
(assoc "un-define" after-load-alist)))
|
|
(setq after-load-alist
|
|
(delete '("un-define") after-load-alist)))
|
|
(when (boundp 'unicode-basic-translation-charset-order-list)
|
|
(condition-case nil
|
|
(let ((val (delq
|
|
'ascii
|
|
(copy-sequence
|
|
(symbol-value
|
|
'unicode-basic-translation-charset-order-list))))
|
|
(elem (assq 'utf-8 mm-mime-mule-charset-alist)))
|
|
(if elem
|
|
(setcdr elem val)
|
|
(setq mm-mime-mule-charset-alist
|
|
(nconc mm-mime-mule-charset-alist
|
|
(list (cons 'utf-8 val))))))
|
|
(error))))
|
|
|
|
;; Correct by construction, but should be unnecessary for Emacs:
|
|
(if (featurep 'xemacs)
|
|
(eval-after-load "un-define" '(mm-enrich-utf-8-by-mule-ucs))
|
|
(when (and (fboundp 'coding-system-list)
|
|
(fboundp 'sort-coding-systems))
|
|
(let ((css (sort-coding-systems (coding-system-list 'base-only)))
|
|
cs mime mule alist)
|
|
(while css
|
|
(setq cs (pop css)
|
|
mime (or (coding-system-get cs :mime-charset) ; Emacs 22
|
|
(coding-system-get cs 'mime-charset)))
|
|
(when (and mime
|
|
(not (eq t (setq mule
|
|
(coding-system-get cs 'safe-charsets))))
|
|
(not (assq mime alist)))
|
|
(push (cons mime (delq 'ascii mule)) alist)))
|
|
(setq mm-mime-mule-charset-alist (nreverse alist)))))
|
|
|
|
(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.")
|
|
|
|
(defcustom mm-coding-system-priorities
|
|
(if (boundp 'current-language-environment)
|
|
(let ((lang (symbol-value 'current-language-environment)))
|
|
(cond ((string= lang "Japanese")
|
|
;; Japanese users prefer iso-2022-jp to euc-japan or
|
|
;; shift_jis, however iso-8859-1 should be used when
|
|
;; there are only ASCII text and Latin-1 characters.
|
|
'(iso-8859-1 iso-2022-jp iso-2022-jp-2 shift_jis utf-8)))))
|
|
"Preferred coding systems for encoding outgoing messages.
|
|
|
|
More than one suitable coding system may be found for some text.
|
|
By default, the coding system with the highest priority is used
|
|
to encode outgoing messages (see `sort-coding-systems'). If this
|
|
variable is set, it overrides the default priority."
|
|
:version "21.2"
|
|
:type '(repeat (symbol :tag "Coding system"))
|
|
:group 'mime)
|
|
|
|
;; ??
|
|
(defvar mm-use-find-coding-systems-region
|
|
(fboundp 'find-coding-systems-region)
|
|
"Use `find-coding-systems-region' to find proper coding systems.
|
|
|
|
Setting it to nil is useful on Emacsen supporting Unicode if sending
|
|
mail with multiple parts is preferred to sending a Unicode one.")
|
|
|
|
;;; Internal variables:
|
|
|
|
;;; Functions:
|
|
|
|
(defun mm-mule-charset-to-mime-charset (charset)
|
|
"Return the MIME charset corresponding to the given Mule CHARSET."
|
|
(if (and (fboundp 'find-coding-systems-for-charsets)
|
|
(fboundp 'sort-coding-systems))
|
|
(let ((css (sort (sort-coding-systems
|
|
(find-coding-systems-for-charsets (list charset)))
|
|
'mm-sort-coding-systems-predicate))
|
|
cs mime)
|
|
(while (and (not mime)
|
|
css)
|
|
(when (setq cs (pop css))
|
|
(setq mime (or (coding-system-get cs :mime-charset)
|
|
(coding-system-get cs 'mime-charset)))))
|
|
mime)
|
|
(let ((alist (mapcar (lambda (cs)
|
|
(assq cs mm-mime-mule-charset-alist))
|
|
(sort (mapcar 'car mm-mime-mule-charset-alist)
|
|
'mm-sort-coding-systems-predicate)))
|
|
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.
|
|
CHARSET is a symbol naming a MIME charset.
|
|
If optional argument LBT (`unix', `dos' or `mac') is specified, it is
|
|
used as the line break code type of the coding system."
|
|
(when (stringp charset)
|
|
(setq charset (intern (downcase charset))))
|
|
(when lbt
|
|
(setq charset (intern (format "%s-%s" charset lbt))))
|
|
(cond
|
|
((null charset)
|
|
charset)
|
|
;; Running in a non-MULE environment.
|
|
((or (null (mm-get-coding-system-list))
|
|
(not (fboundp 'coding-system-get)))
|
|
charset)
|
|
;; ascii
|
|
((eq charset 'us-ascii)
|
|
'ascii)
|
|
;; 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)
|
|
;; 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 (or (coding-system-get c :mime-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))
|
|
"True in Emacs with Mule.")
|
|
|
|
(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 'to))
|
|
(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)))
|
|
|
|
(defun mm-preferred-coding-system (charset)
|
|
;; A typo in some Emacs versions.
|
|
(or (get-charset-property charset 'preferred-coding-system)
|
|
(get-charset-property charset 'prefered-coding-system)))
|
|
|
|
;; Mule charsets shouldn't be used.
|
|
(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 ((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) ; Mule 4
|
|
(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 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)
|
|
(or (coding-system-get
|
|
(mm-preferred-coding-system charset) :mime-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-delete-duplicates (list)
|
|
"Simple substitute for CL `delete-duplicates', testing with `equal'."
|
|
(let (result head)
|
|
(while list
|
|
(setq head (car list))
|
|
(setq list (delete head list))
|
|
(setq result (cons head result)))
|
|
(nreverse result)))
|
|
|
|
;; Fixme: This is used in places when it should be testing the
|
|
;; default multibyteness. See mm-default-multibyte-p.
|
|
(eval-and-compile
|
|
(if (and (not (featurep 'xemacs))
|
|
(boundp 'enable-multibyte-characters))
|
|
(defun mm-multibyte-p ()
|
|
"Non-nil if multibyte is enabled in the current buffer."
|
|
enable-multibyte-characters)
|
|
(defun mm-multibyte-p () (featurep 'mule))))
|
|
|
|
(defun mm-default-multibyte-p ()
|
|
"Return non-nil if the session is multibyte.
|
|
This affects whether coding conversion should be attempted generally."
|
|
(if (featurep 'mule)
|
|
(if (boundp 'default-enable-multibyte-characters)
|
|
default-enable-multibyte-characters
|
|
t)))
|
|
|
|
(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)
|
|
(let ((priorities
|
|
(mapcar (lambda (cs)
|
|
;; Note: invalid entries are dropped silently
|
|
(and (setq cs (mm-coding-system-p cs))
|
|
(coding-system-base cs)))
|
|
mm-coding-system-priorities)))
|
|
(and (setq a (mm-coding-system-p a))
|
|
(if (setq b (mm-coding-system-p b))
|
|
(> (length (memq (coding-system-base a) priorities))
|
|
(length (memq (coding-system-base b) priorities)))
|
|
t))))
|
|
|
|
(eval-when-compile
|
|
(autoload 'latin-unity-massage-name "latin-unity")
|
|
(autoload 'latin-unity-maybe-remap "latin-unity")
|
|
(autoload 'latin-unity-representations-feasible-region "latin-unity")
|
|
(autoload 'latin-unity-representations-present-region "latin-unity")
|
|
(defvar latin-unity-coding-systems)
|
|
(defvar latin-unity-ucs-list))
|
|
|
|
(defun mm-xemacs-find-mime-charset-1 (begin end)
|
|
"Determine which MIME charset to use to send region as message.
|
|
This uses the XEmacs-specific latin-unity package to better handle the
|
|
case where identical characters from diverse ISO-8859-? character sets
|
|
can be encoded using a single one of the corresponding coding systems.
|
|
|
|
It treats `mm-coding-system-priorities' as the list of preferred
|
|
coding systems; a useful example setting for this list in Western
|
|
Europe would be '(iso-8859-1 iso-8859-15 utf-8), which would default
|
|
to the very standard Latin 1 coding system, and only move to coding
|
|
systems that are less supported as is necessary to encode the
|
|
characters that exist in the buffer.
|
|
|
|
Latin Unity doesn't know about those non-ASCII Roman characters that
|
|
are available in various East Asian character sets. As such, its
|
|
behavior if you have a JIS 0212 LATIN SMALL LETTER A WITH ACUTE in a
|
|
buffer and it can otherwise be encoded as Latin 1, won't be ideal.
|
|
But this is very much a corner case, so don't worry about it."
|
|
(let ((systems mm-coding-system-priorities) csets psets curset)
|
|
|
|
;; Load the Latin Unity library, if available.
|
|
(when (and (not (featurep 'latin-unity)) (locate-library "latin-unity"))
|
|
(require 'latin-unity))
|
|
|
|
;; Now, can we use it?
|
|
(if (featurep 'latin-unity)
|
|
(progn
|
|
(setq csets (latin-unity-representations-feasible-region begin end)
|
|
psets (latin-unity-representations-present-region begin end))
|
|
|
|
(catch 'done
|
|
|
|
;; Pass back the first coding system in the preferred list
|
|
;; that can encode the whole region.
|
|
(dolist (curset systems)
|
|
(setq curset (latin-unity-massage-name 'buffer-default curset))
|
|
|
|
;; If the coding system is a universal coding system, then
|
|
;; it can certainly encode all the characters in the region.
|
|
(if (memq curset latin-unity-ucs-list)
|
|
(throw 'done (list curset)))
|
|
|
|
;; If a coding system isn't universal, and isn't in
|
|
;; the list that latin unity knows about, we can't
|
|
;; decide whether to use it here. Leave that until later
|
|
;; in `mm-find-mime-charset-region' function, whence we
|
|
;; have been called.
|
|
(unless (memq curset latin-unity-coding-systems)
|
|
(throw 'done nil))
|
|
|
|
;; Right, we know about this coding system, and it may
|
|
;; conceivably be able to encode all the characters in
|
|
;; the region.
|
|
(if (latin-unity-maybe-remap begin end curset csets psets t)
|
|
(throw 'done (list curset))))
|
|
|
|
;; Can't encode using anything from the
|
|
;; `mm-coding-system-priorities' list.
|
|
;; Leave `mm-find-mime-charset' to do most of the work.
|
|
nil))
|
|
|
|
;; Right, latin unity isn't available; let `mm-find-charset-region'
|
|
;; take its default action, which equally applies to GNU Emacs.
|
|
nil)))
|
|
|
|
(defmacro mm-xemacs-find-mime-charset (begin end)
|
|
(when (featurep 'xemacs)
|
|
`(mm-xemacs-find-mime-charset-1 ,begin ,end)))
|
|
|
|
(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)))
|
|
(setq systems (delq 'compound-text systems))
|
|
(unless (equal systems '(undecided))
|
|
(while systems
|
|
(let* ((head (pop systems))
|
|
(cs (or (coding-system-get head :mime-charset)
|
|
(coding-system-get head 'mime-charset))))
|
|
;; The mime-charset (`x-ctext') of
|
|
;; `compound-text' is not in the IANA list. We
|
|
;; shouldn't normally use anything here with a
|
|
;; mime-charset having an `x-' prefix.
|
|
;; Fixme: Allow this to be overridden, since
|
|
;; there is existing use of x-ctext.
|
|
;; Also people apparently need the coding system
|
|
;; `iso-2022-jp-3' (which Mule-UCS defines with
|
|
;; mime-charset, though it's not valid).
|
|
(if (and cs
|
|
(not (string-match "^[Xx]-" (symbol-name cs)))
|
|
;; UTF-16 of any variety is invalid for
|
|
;; text parts and, unfortunately, has
|
|
;; mime-charset defined both in Mule-UCS
|
|
;; and versions of Emacs. (The name
|
|
;; might be `mule-utf-16...' or
|
|
;; `utf-16...'.)
|
|
(not (string-match "utf-16" (symbol-name cs))))
|
|
(setq systems nil
|
|
charsets (list cs))))))
|
|
charsets))
|
|
;; If we're XEmacs, and some coding system is appropriate,
|
|
;; mm-xemacs-find-mime-charset will return an appropriate list.
|
|
;; Otherwise, we'll get nil, and the next setq will get invoked.
|
|
(setq charsets (mm-xemacs-find-mime-charset b e))
|
|
|
|
;; We're not multibyte, 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 (> (length charsets) 1)
|
|
(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'.
|
|
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-multibyte-buffer (&rest forms)
|
|
"Create a temporary buffer, and evaluate FORMS there like `progn'.
|
|
Use multibyte mode for this."
|
|
`(let ((default-enable-multibyte-characters t))
|
|
(with-temp-buffer ,@forms)))
|
|
(put 'mm-with-multibyte-buffer 'lisp-indent-function 0)
|
|
(put 'mm-with-multibyte-buffer 'edebug-form-spec '(body))
|
|
|
|
(defmacro mm-with-unibyte-current-buffer (&rest forms)
|
|
"Evaluate FORMS with 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 (&rest forms)
|
|
"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))
|
|
|
|
(defmacro mm-with-multibyte (&rest forms)
|
|
"Eval the FORMS with the default value of `enable-multibyte-characters' t."
|
|
`(let ((default-enable-multibyte-characters t))
|
|
,@forms))
|
|
(put 'mm-with-multibyte 'lisp-indent-function 0)
|
|
(put 'mm-with-multibyte 'edebug-form-spec '(body))
|
|
|
|
(defun mm-find-charset-region (b e)
|
|
"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.
|
|
;; 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)
|
|
(goto-char (point-min))
|
|
(skip-chars-forward "\0-\177")
|
|
(if (eobp)
|
|
'(ascii)
|
|
(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."
|
|
(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 image-file-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', 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)))
|
|
(write-region start end filename t 'no-message)
|
|
(message "Appended to %s" 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)))
|
|
|
|
(defun mm-image-load-path (&optional package)
|
|
(let (dir result)
|
|
(dolist (path load-path (nreverse result))
|
|
(when (and path
|
|
(file-directory-p
|
|
(setq dir (concat (file-name-directory
|
|
(directory-file-name path))
|
|
"etc/" (or package "gnus/")))))
|
|
(push dir result))
|
|
(push path result))))
|
|
|
|
;; Fixme: This doesn't look useful where it's used.
|
|
(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)
|
|
|
|
;;; arch-tag: 94dc5388-825d-4fd1-bfa5-2100aa351238
|
|
;;; mm-util.el ends here
|