X-Git-Url: http://git.chise.org/gitweb/?a=blobdiff_plain;f=lisp%2Fmm-util.el;h=e64e32594503d6a35031020d94dea678d0d40da0;hb=3a75505b36e914f05480b86020edd727c6abe2fb;hp=2cd60036cc04b3791b161a77d3c786a4ef721163;hpb=f1978432e2f74cfd77f0ad0db0ce8e99b79003e6;p=elisp%2Fgnus.git- diff --git a/lisp/mm-util.el b/lisp/mm-util.el index 2cd6003..e64e325 100644 --- a/lisp/mm-util.el +++ b/lisp/mm-util.el @@ -1,5 +1,5 @@ -;;; mm-util.el --- Utility functions for MIME things -;; Copyright (C) 1998 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 ;; MORIOKA Tomohiko @@ -24,33 +24,179 @@ ;;; Code: -(defvar mm-default-coding-system nil - "The default coding system to use.") +(eval-when-compile (require 'cl)) +(require 'mail-prsvr) -(defvar mm-known-charsets '(iso-8859-1) - "List of known charsets.") +(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) + (device-type . ignore) + (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-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)))) + 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 (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 + ((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 '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) + `((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) + ;; 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-2022-jp latin-jisx0201 - japanese-jisx0208-1978 japanese-jisx0208) + (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) - (cn-gb-2312 chinese-gb2312) - (cn-big5 chinese-big5-1 chinese-big5-2) + (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) + 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 @@ -64,68 +210,102 @@ chinese-cns11643-1 chinese-cns11643-2 chinese-cns11643-3 chinese-cns11643-4 chinese-cns11643-5 chinese-cns11643-6 - chinese-cns11643-7)) + 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)))))) -(eval-and-compile - (mapcar - (lambda (elem) - (let ((nfunc (intern (format "mm-%s" (car elem))))) - (if (fboundp (car elem)) - (fset nfunc (car elem)) - (fset 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) - (device-type . ignore) - (coding-system-equal . equal) - (annotationp . ignore) - (set-buffer-file-coding-system . ignore) - (make-char - . (lambda (charset int) - (int-to-char int))) - (read-coding-system - . (lambda (prompt) - "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-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-coding-system-list nil) -(defun mm-get-coding-system-list () - "Get the coding system list." - (or mm-coding-system-list - (setq mm-coding-system-list (mm-coding-system-list)))) +(defvar mm-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.") -(defvar mm-charset-coding-system-alist - (let ((rest - '((gb2312 . cn-gb-2312) - (iso-2022-jp-2 . iso-2022-7bit-ss2) - (x-ctext . ctext))) - (systems (mm-get-coding-system-list)) - dest) - (while rest - (let ((pair (car rest))) - (unless (memq (car pair) systems) - (setq dest (cons pair dest)))) - (setq rest (cdr rest))) - dest) - "Charset/coding system alist.") +;;; 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. @@ -134,101 +314,296 @@ 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)))) - (setq charset - (or (cdr (assq charset mm-charset-coding-system-alist)) - charset)) (when lbt (setq charset (intern (format "%s-%s" charset lbt)))) (cond + ((null charset) + charset) ;; Running in a non-MULE environment. - ((and (null (mm-get-coding-system-list)) - (memq charset mm-known-charsets)) + ((null (mm-get-coding-system-list)) charset) ;; ascii ((eq charset 'us-ascii) 'ascii) - ;; Check to see whether we can handle this charset. - ((memq charset (mm-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) - (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))) - -(defun mm-mime-charset (charset b e) - (if (fboundp 'coding-system-get) + ;; 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 '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 ((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 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-default-coding-system - (let ((safe (coding-system-get mm-default-coding-system - 'safe-charsets))) - (or (eq safe t) (memq charset safe))) - (coding-system-get mm-default-coding-system 'mime-charset)) - (coding-system-get - (get-charset-property charset 'prefered-coding-system) - 'mime-charset) - (car (memq charset (find-coding-systems-region - (point-min) (point-max))))) + (and (mm-preferred-coding-system charset) + (coding-system-get + (mm-preferred-coding-system charset) 'mime-charset)) + (and (eq charset 'ascii) + 'us-ascii) + (mm-preferred-coding-system charset) + (mm-mule-charset-to-mime-charset charset)) + ;; This is for XEmacs. (mm-mule-charset-to-mime-charset charset))) -(defsubst mm-multibyte-p () - "Say whether multibyte is enabled." - (and (boundp 'enable-multibyte-characters) - enable-multibyte-characters)) +(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))) + +(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 (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) - ,@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 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 charsets in the region." + "Return a list of Emacs charsets in the region B to E." (cond - ((and (boundp 'enable-multibyte-characters) - enable-multibyte-characters) - (find-charset-region b e)) - ((not (boundp 'current-language-environment)) + ((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) @@ -236,20 +611,146 @@ See also `with-temp-file' and `with-output-to-string'." (skip-chars-forward "\0-\177") (if (eobp) '(ascii) - ;;;!!!bogus - (list 'ascii '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 (capitalize current-language-environment) - language-info-alist))) - (skip-chars-forward "\0-\177") - (if (eobp) - '(ascii) - (list 'ascii (car (last (assq 'charset entry))))))))))) + (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)))) + +(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)