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727 lines
25 KiB
EmacsLisp
727 lines
25 KiB
EmacsLisp
;;; mm-util.el --- Utility functions for Mule and low level things
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;; Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
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;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
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;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;;; Code:
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(eval-when-compile (require 'cl))
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(require 'mail-prsvr)
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(eval-and-compile
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(mapcar
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(lambda (elem)
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(let ((nfunc (intern (format "mm-%s" (car elem)))))
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(if (fboundp (car elem))
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(defalias nfunc (car elem))
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(defalias nfunc (cdr elem)))))
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'((decode-coding-string . (lambda (s a) s))
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(encode-coding-string . (lambda (s a) s))
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(encode-coding-region . ignore)
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(coding-system-list . ignore)
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(decode-coding-region . ignore)
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(char-int . identity)
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(device-type . ignore)
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(coding-system-equal . equal)
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(annotationp . ignore)
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(set-buffer-file-coding-system . ignore)
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(make-char
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. (lambda (charset int)
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(int-to-char int)))
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(read-charset
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. (lambda (prompt)
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"Return a charset."
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(intern
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(completing-read
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prompt
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(mapcar (lambda (e) (list (symbol-name (car e))))
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mm-mime-mule-charset-alist)
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nil t))))
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(subst-char-in-string
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. (lambda (from to string) ;; stolen (and renamed) from nnheader.el
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"Replace characters in STRING from FROM to TO."
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(let ((string (substring string 0)) ;Copy string.
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(len (length string))
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(idx 0))
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;; Replace all occurrences of FROM with TO.
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(while (< idx len)
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(when (= (aref string idx) from)
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(aset string idx to))
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(setq idx (1+ idx)))
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string)))
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(string-as-unibyte . identity)
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(string-as-multibyte . identity)
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(multibyte-string-p . ignore))))
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(eval-and-compile
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(defalias 'mm-char-or-char-int-p
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(cond
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((fboundp 'char-or-char-int-p) 'char-or-char-int-p)
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((fboundp 'char-valid-p) 'char-valid-p)
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(t 'identity))))
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(eval-and-compile
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(defalias 'mm-read-coding-system
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(cond
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((fboundp 'read-coding-system)
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(if (and (featurep 'xemacs)
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(<= (string-to-number emacs-version) 21.1))
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(lambda (prompt &optional default-coding-system)
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(read-coding-system prompt))
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'read-coding-system))
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(t (lambda (prompt &optional default-coding-system)
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"Prompt the user for a coding system."
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(completing-read
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prompt (mapcar (lambda (s) (list (symbol-name (car s))))
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mm-mime-mule-charset-alist)))))))
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(defvar mm-coding-system-list nil)
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(defun mm-get-coding-system-list ()
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"Get the coding system list."
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(or mm-coding-system-list
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(setq mm-coding-system-list (mm-coding-system-list))))
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(defun mm-coding-system-p (sym)
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"Return non-nil if SYM is a coding system."
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(or (and (fboundp 'coding-system-p) (coding-system-p sym))
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(memq sym (mm-get-coding-system-list))))
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(defvar mm-charset-synonym-alist
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`(
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;; Perfectly fine? A valid MIME name, anyhow.
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,@(unless (mm-coding-system-p 'big5)
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'((big5 . cn-big5)))
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;; Not in XEmacs, but it's not a proper MIME charset anyhow.
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,@(unless (mm-coding-system-p 'x-ctext)
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'((x-ctext . ctext)))
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;; Apparently not defined in Emacs 20, but is a valid MIME name.
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,@(unless (mm-coding-system-p 'gb2312)
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'((gb2312 . cn-gb-2312)))
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;; ISO-8859-15 is very similar to ISO-8859-1.
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,@(unless (mm-coding-system-p 'iso-8859-15) ; Emacs 21 defines it.
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'((iso-8859-15 . iso-8859-1)))
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;; Windows-1252 is actually a superset of Latin-1. See also
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;; `gnus-article-dumbquotes-map'.
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,@(unless (mm-coding-system-p 'windows-1252)
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(if (mm-coding-system-p 'cp1252)
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'((windows-1252 . cp1252))
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'((windows-1252 . iso-8859-1))))
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;; Windows-1250 is a variant of Latin-2 heavily used by Microsoft
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;; Outlook users in Czech republic. Use this to allow reading of their
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;; e-mails. cp1250 should be defined by M-x codepage-setup.
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,@(if (and (not (mm-coding-system-p 'windows-1250))
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(mm-coding-system-p 'cp1250))
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'((windows-1250 . cp1250)))
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)
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"A mapping from invalid charset names to the real charset names.")
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(defvar mm-binary-coding-system
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(cond
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((mm-coding-system-p 'binary) 'binary)
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((mm-coding-system-p 'no-conversion) 'no-conversion)
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(t nil))
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"100% binary coding system.")
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(defvar mm-text-coding-system
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(or (if (memq system-type '(windows-nt ms-dos ms-windows))
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(and (mm-coding-system-p 'raw-text-dos) 'raw-text-dos)
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(and (mm-coding-system-p 'raw-text) 'raw-text))
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mm-binary-coding-system)
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"Text-safe coding system (For removing ^M).")
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(defvar mm-text-coding-system-for-write nil
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"Text coding system for write.")
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(defvar mm-auto-save-coding-system
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(cond
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((mm-coding-system-p 'emacs-mule)
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(if (memq system-type '(windows-nt ms-dos ms-windows))
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(if (mm-coding-system-p 'emacs-mule-dos)
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'emacs-mule-dos mm-binary-coding-system)
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'emacs-mule))
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((mm-coding-system-p 'escape-quoted) 'escape-quoted)
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(t mm-binary-coding-system))
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"Coding system of auto save file.")
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(defvar mm-universal-coding-system mm-auto-save-coding-system
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"The universal coding system.")
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;; Fixme: some of the cars here aren't valid MIME charsets. That
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;; should only matter with XEmacs, though.
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(defvar mm-mime-mule-charset-alist
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`((us-ascii ascii)
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(iso-8859-1 latin-iso8859-1)
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(iso-8859-2 latin-iso8859-2)
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(iso-8859-3 latin-iso8859-3)
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(iso-8859-4 latin-iso8859-4)
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(iso-8859-5 cyrillic-iso8859-5)
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;; Non-mule (X)Emacs uses the last mule-charset for 8bit characters.
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;; The fake mule-charset, gnus-koi8-r, tells Gnus that the default
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;; charset is koi8-r, not iso-8859-5.
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(koi8-r cyrillic-iso8859-5 gnus-koi8-r)
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(iso-8859-6 arabic-iso8859-6)
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(iso-8859-7 greek-iso8859-7)
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(iso-8859-8 hebrew-iso8859-8)
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(iso-8859-9 latin-iso8859-9)
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(iso-8859-14 latin-iso8859-14)
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(iso-8859-15 latin-iso8859-15)
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(viscii vietnamese-viscii-lower)
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(iso-2022-jp latin-jisx0201 japanese-jisx0208 japanese-jisx0208-1978)
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(euc-kr korean-ksc5601)
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(gb2312 chinese-gb2312)
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(big5 chinese-big5-1 chinese-big5-2)
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(tibetan tibetan)
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(thai-tis620 thai-tis620)
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(iso-2022-7bit ethiopic arabic-1-column arabic-2-column)
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(iso-2022-jp-2 latin-iso8859-1 greek-iso8859-7
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latin-jisx0201 japanese-jisx0208-1978
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chinese-gb2312 japanese-jisx0208
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korean-ksc5601 japanese-jisx0212
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katakana-jisx0201)
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(iso-2022-int-1 latin-iso8859-1 greek-iso8859-7
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latin-jisx0201 japanese-jisx0208-1978
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chinese-gb2312 japanese-jisx0208
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korean-ksc5601 japanese-jisx0212
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chinese-cns11643-1 chinese-cns11643-2)
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(iso-2022-int-1 latin-iso8859-1 latin-iso8859-2
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cyrillic-iso8859-5 greek-iso8859-7
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latin-jisx0201 japanese-jisx0208-1978
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chinese-gb2312 japanese-jisx0208
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korean-ksc5601 japanese-jisx0212
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chinese-cns11643-1 chinese-cns11643-2
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chinese-cns11643-3 chinese-cns11643-4
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chinese-cns11643-5 chinese-cns11643-6
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chinese-cns11643-7)
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,(if (or (not (fboundp 'charsetp)) ;; non-Mule case
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(charsetp 'unicode-a)
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(not (mm-coding-system-p 'mule-utf-8)))
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'(utf-8 unicode-a unicode-b unicode-c unicode-d unicode-e)
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;; If we have utf-8 we're in Mule 5+.
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(append '(utf-8)
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(delete 'ascii
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(coding-system-get 'mule-utf-8 'safe-charsets)))))
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"Alist of MIME-charset/MULE-charsets.")
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;; Correct by construction, but should be unnecessary:
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;; XEmacs hates it.
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(when (and (not (featurep 'xemacs))
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(fboundp 'coding-system-list)
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(fboundp 'sort-coding-systems))
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(setq mm-mime-mule-charset-alist
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(apply
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'nconc
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(mapcar
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(lambda (cs)
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(when (and (coding-system-get cs 'mime-charset)
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(not (eq t (coding-system-get cs 'safe-charsets))))
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(list (cons (coding-system-get cs 'mime-charset)
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(delq 'ascii
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(coding-system-get cs 'safe-charsets))))))
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(sort-coding-systems (coding-system-list 'base-only))))))
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(defvar mm-hack-charsets '(iso-8859-15 iso-2022-jp-2)
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"A list of special charsets.
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Valid elements include:
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`iso-8859-15' convert ISO-8859-1, -9 to ISO-8859-15 if ISO-8859-15 exists.
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`iso-2022-jp-2' convert ISO-2022-jp to ISO-2022-jp-2 if ISO-2022-jp-2 exists."
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)
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(defvar mm-iso-8859-15-compatible
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'((iso-8859-1 "\xA4\xA6\xA8\xB4\xB8\xBC\xBD\xBE")
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(iso-8859-9 "\xA4\xA6\xA8\xB4\xB8\xBC\xBD\xBE\xD0\xDD\xDE\xF0\xFD\xFE"))
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"ISO-8859-15 exchangeable coding systems and inconvertible characters.")
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(defvar mm-iso-8859-x-to-15-table
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(and (fboundp 'coding-system-p)
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(mm-coding-system-p 'iso-8859-15)
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(mapcar
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(lambda (cs)
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(if (mm-coding-system-p (car cs))
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(let ((c (string-to-char
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(decode-coding-string "\341" (car cs)))))
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(cons (char-charset c)
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(cons
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(- (string-to-char
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(decode-coding-string "\341" 'iso-8859-15)) c)
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(string-to-list (decode-coding-string (car (cdr cs))
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(car cs))))))
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'(gnus-charset 0)))
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mm-iso-8859-15-compatible))
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"A table of the difference character between ISO-8859-X and ISO-8859-15.")
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(defvar mm-coding-system-priorities nil
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"Preferred coding systems for encoding outgoing mails.
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More than one suitable coding systems may be found for some texts. By
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default, a coding system with the highest priority is used to encode
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outgoing mails (see `sort-coding-systems'). If this variable is set,
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it overrides the default priority. For example, Japanese users may
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prefer iso-2022-jp to japanese-shift-jis:
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\(setq mm-coding-system-priorities
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'(iso-2022-jp iso-2022-jp-2 japanese-shift-jis utf-8))
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")
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;;; Internal variables:
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;;; Functions:
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(defun mm-mule-charset-to-mime-charset (charset)
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"Return the MIME charset corresponding to the given Mule CHARSET."
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(if (fboundp 'find-coding-systems-for-charsets)
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(let (mime)
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(dolist (cs (find-coding-systems-for-charsets (list charset)))
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(unless mime
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(when cs
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(setq mime (coding-system-get cs 'mime-charset)))))
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mime)
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(let ((alist mm-mime-mule-charset-alist)
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out)
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(while alist
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(when (memq charset (cdar alist))
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(setq out (caar alist)
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alist nil))
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(pop alist))
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out)))
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(defun mm-charset-to-coding-system (charset &optional lbt)
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"Return coding-system corresponding to CHARSET.
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CHARSET is a symbol naming a MIME charset.
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If optional argument LBT (`unix', `dos' or `mac') is specified, it is
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used as the line break code type of the coding system."
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(when (stringp charset)
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(setq charset (intern (downcase charset))))
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(when lbt
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(setq charset (intern (format "%s-%s" charset lbt))))
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(cond
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((null charset)
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charset)
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;; Running in a non-MULE environment.
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((null (mm-get-coding-system-list))
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charset)
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;; ascii
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((eq charset 'us-ascii)
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'ascii)
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;; Check to see whether we can handle this charset. (This depends
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;; on there being some coding system matching each `mime-charset'
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;; property defined, as there should be.)
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((and (mm-coding-system-p charset)
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;;; Doing this would potentially weed out incorrect charsets.
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;;; charset
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;;; (eq charset (coding-system-get charset 'mime-charset))
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)
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charset)
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;; Translate invalid charsets.
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((mm-coding-system-p (setq charset
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(cdr (assq charset
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mm-charset-synonym-alist))))
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charset)
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;; Last resort: search the coding system list for entries which
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;; have the right mime-charset in case the canonical name isn't
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;; defined (though it should be).
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((let (cs)
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;; mm-get-coding-system-list returns a list of cs without lbt.
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;; Do we need -lbt?
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(dolist (c (mm-get-coding-system-list))
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(if (and (null cs)
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(eq charset (coding-system-get c 'mime-charset)))
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(setq cs c)))
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cs))))
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(defsubst mm-replace-chars-in-string (string from to)
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(mm-subst-char-in-string from to string))
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(eval-and-compile
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(defvar mm-emacs-mule (and (not (featurep 'xemacs))
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(boundp 'default-enable-multibyte-characters)
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default-enable-multibyte-characters
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(fboundp 'set-buffer-multibyte))
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"Emacs mule.")
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(defvar mm-mule4-p (and mm-emacs-mule
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(fboundp 'charsetp)
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(not (charsetp 'eight-bit-control)))
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"Mule version 4.")
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(if mm-emacs-mule
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(defun mm-enable-multibyte ()
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"Set the multibyte flag of the current buffer.
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Only do this if the default value of `enable-multibyte-characters' is
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non-nil. This is a no-op in XEmacs."
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(set-buffer-multibyte t))
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(defalias 'mm-enable-multibyte 'ignore))
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(if mm-emacs-mule
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(defun mm-disable-multibyte ()
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"Unset the multibyte flag of in the current buffer.
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This is a no-op in XEmacs."
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(set-buffer-multibyte nil))
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(defalias 'mm-disable-multibyte 'ignore))
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(if mm-mule4-p
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(defun mm-enable-multibyte-mule4 ()
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"Enable multibyte in the current buffer.
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Only used in Emacs Mule 4."
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(set-buffer-multibyte t))
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(defalias 'mm-enable-multibyte-mule4 'ignore))
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(if mm-mule4-p
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(defun mm-disable-multibyte-mule4 ()
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"Disable multibyte in the current buffer.
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Only used in Emacs Mule 4."
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(set-buffer-multibyte nil))
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(defalias 'mm-disable-multibyte-mule4 'ignore)))
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(defun mm-preferred-coding-system (charset)
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;; A typo in some Emacs versions.
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(or (get-charset-property charset 'preferred-coding-system)
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(get-charset-property charset 'prefered-coding-system)))
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(defun mm-charset-after (&optional pos)
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"Return charset of a character in current buffer at position POS.
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If POS is nil, it defauls to the current point.
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If POS is out of range, the value is nil.
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If the charset is `composition', return the actual one."
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(let ((char (char-after pos)) charset)
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(if (< (mm-char-int char) 128)
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(setq charset 'ascii)
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;; charset-after is fake in some Emacsen.
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(setq charset (and (fboundp 'char-charset) (char-charset char)))
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(if (eq charset 'composition)
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(let ((p (or pos (point))))
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(cadr (find-charset-region p (1+ p))))
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(if (and charset (not (memq charset '(ascii eight-bit-control
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eight-bit-graphic))))
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charset
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(or
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mail-parse-mule-charset ;; cached mule-charset
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(progn
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(setq mail-parse-mule-charset
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(and (boundp 'current-language-environment)
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(car (last
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(assq 'charset
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(assoc current-language-environment
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language-info-alist))))))
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(if (or (not mail-parse-mule-charset)
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(eq mail-parse-mule-charset 'ascii))
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(setq mail-parse-mule-charset
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(or (car (last (assq mail-parse-charset
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mm-mime-mule-charset-alist)))
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;; Fixme: don't fix that!
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'latin-iso8859-1)))
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mail-parse-mule-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)
|
|
(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)))
|
|
|
|
;; It's not clear whether this is supposed to mean the global or local
|
|
;; setting. I think it's used inconsistently. -- fx
|
|
(defsubst mm-multibyte-p ()
|
|
"Say whether multibyte is enabled."
|
|
(if (and (not (featurep 'xemacs))
|
|
(boundp 'enable-multibyte-characters))
|
|
enable-multibyte-characters
|
|
(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 (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)
|
|
(fboundp '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'.
|
|
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 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)
|
|
"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 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', 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)))
|
|
|
|
(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
|