-;;; mm-util.el --- Utility functions for MIME things
-;; Copyright (C) 1998,99 Free Software Foundation, Inc.
+;;; mm-util.el --- Utility functions for Mule and low level things
+;; Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
;; MORIOKA Tomohiko <morioka@jaist.ac.jp>
;;; Code:
-(defconst mm-running-xemacs (string-match "XEmacs" emacs-version))
-
-(defconst mm-binary-coding-system
- (if mm-running-xemacs
- 'binary 'no-conversion)
- "100% binary coding system.")
-
-(defconst mm-text-coding-system
- (and (fboundp 'coding-system-list)
- (if (memq system-type '(windows-nt ms-dos ms-windows))
- 'raw-text-dos 'raw-text))
- "Text-safe coding system (For removing ^M).")
+(eval-when-compile (require 'cl))
+(require 'mail-prsvr)
(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-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)
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
+ (not (fboundp 'coding-system-p))
+ (charsetp 'unicode-a)
+ (not (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+.
+ (delete 'ascii (coding-system-get 'mule-utf-8 'safe-charsets))))
"Alist of MIME-charset/MULE-charsets.")
-
(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)))))
+ (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)
"Prompt the user for a coding system."
(completing-read
prompt (mapcar (lambda (s) (list (symbol-name (car s))))
- mm-mime-mule-charset-alist)))))))
+ mm-mime-mule-charset-alist))))
+ (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)
+ (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))))
(defvar mm-coding-system-list nil)
(defun mm-get-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
- '((big5 . cn-big5)
+ `((big5 . cn-big5)
(gb2312 . cn-gb-2312)
+ (cn-gb . cn-gb-2312)
+ ;; Windows-1252 is actually a superset of Latin-1. See also
+ ;; `gnus-article-dumbquotes-map'.
+ ,(unless (mm-coding-system-p 'windows-1252) ; should be defined eventually
+ '(windows-1252 . iso-8859-1))
(x-ctext . ctext))
"A mapping from invalid charset names to the real charset names.")
-(defconst mm-auto-save-coding-system
- (cond
- ((memq 'emacs-mule (mm-get-coding-system-list))
- (if (memq system-type '(windows-nt ms-dos ms-windows))
- 'emacs-mule-dos 'emacs-mule))
- ((memq 'escape-quoted (mm-get-coding-system-list))
- 'escape-quoted)
- ((memq 'no-conversion (mm-get-coding-system-list))
- 'no-conversion)
+(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.")
;;; Internal variables:
;;; Functions:
(defun mm-mule-charset-to-mime-charset (charset)
- "Return the MIME charset corresponding to MULE CHARSET."
+ "Return the MIME charset corresponding to the given Mule CHARSET."
(let ((alist mm-mime-mule-charset-alist)
out)
(while alist
;; ascii
((eq charset 'us-ascii)
'ascii)
- ;; Check to see whether we can handle this charset.
+ ;; Check to see whether we can handle this charset. (This depends
+ ;; on there being some coding system matching each `mime-charset'
+ ;; coding sysytem property defined, as there should be.)
((memq charset (mm-get-coding-system-list))
charset)
;; Nope.
(t
nil)))
-(defun mm-replace-chars-in-string (string from to)
- "Replace characters in STRING from FROM to TO."
- (let ((string (substring string 0)) ;Copy string.
- (len (length string))
- (idx 0))
- ;; Replace all occurrences of FROM with TO.
- (while (< idx len)
- (when (= (aref string idx) from)
- (aset string idx to))
- (setq idx (1+ idx)))
- string))
+(defsubst mm-replace-chars-in-string (string from to)
+ (mm-subst-char-in-string from to string))
(defsubst mm-enable-multibyte ()
- "Enable multibyte in the current buffer."
- (when (and (fboundp 'set-buffer-multibyte)
- (default-value 'enable-multibyte-characters))
+ "Set the multibyte flag of the current buffer.
+Only do this if the default value of `enable-multibyte-characters' is
+non-nil. This is a no-op in XEmacs."
+ (when (and (not (featurep 'xemacs))
+ (boundp 'default-enable-multibyte-characters)
+ default-enable-multibyte-characters
+ (fboundp 'set-buffer-multibyte))
(set-buffer-multibyte t)))
(defsubst mm-disable-multibyte ()
- "Disable multibyte in the current buffer."
- (when (fboundp 'set-buffer-multibyte)
+ "Unset the multibyte flag of in the current buffer.
+This is a no-op in XEmacs."
+ (when (and (not (featurep 'xemacs))
+ (fboundp 'set-buffer-multibyte))
+ (set-buffer-multibyte nil)))
+
+(defsubst mm-enable-multibyte-mule4 ()
+ "Enable multibyte in the current buffer.
+Only used in Emacs Mule 4."
+ (when (and (not (featurep 'xemacs))
+ (boundp 'default-enable-multibyte-characters)
+ default-enable-multibyte-characters
+ (fboundp 'set-buffer-multibyte)
+ (fboundp 'charsetp)
+ (not (charsetp 'eight-bit-control)))
+ (set-buffer-multibyte t)))
+
+(defsubst mm-disable-multibyte-mule4 ()
+ "Disable multibyte in the current buffer.
+Only used in Emacs Mule 4."
+ (when (and (not (featurep 'xemacs))
+ (fboundp 'set-buffer-multibyte)
+ (fboundp 'charsetp)
+ (not (charsetp 'eight-bit-control)))
(set-buffer-multibyte nil)))
(defun mm-preferred-coding-system (charset)
;; A typo in some Emacs versions.
(or (get-charset-property charset 'prefered-coding-system)
- (get-charset-property charset 'preffered-coding-system)))
+ (get-charset-property charset 'preferred-coding-system)))
+
+(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
+ (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)))
+ ;; Fixme: don't fix that!
+ 'latin-iso8859-1)))
+ mail-parse-mule-charset)))))))
(defun mm-mime-charset (charset)
"Return the MIME charset corresponding to the MULE CHARSET."
- (if (fboundp 'coding-system-get)
+ (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)
;; 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)))
+
(defun mm-find-mime-charset-region (b e)
"Return the MIME charsets needed to encode the region between B and E."
- (let ((charsets
- (mapcar 'mm-mime-charset
- (delq 'ascii
- (mm-find-charset-region b e)))))
+ (let ((charsets (mapcar 'mm-mime-charset
+ (delq 'ascii
+ (mm-find-charset-region b e)))))
(when (memq 'iso-2022-jp-2 charsets)
(setq charsets (delq 'iso-2022-jp charsets)))
- (delete-duplicates charsets)))
+ (setq charsets (mm-delete-duplicates charsets))
+ (if (and (> (length charsets) 1)
+ (fboundp 'find-coding-systems-region)
+ (let ((cs (find-coding-systems-region b e)))
+ (or (memq 'utf-8 cs) (memq 'mule-utf-8 cs))))
+ '(utf-8)
+ charsets)))
(defsubst mm-multibyte-p ()
"Say whether multibyte is enabled."
- (and (boundp 'enable-multibyte-characters)
- enable-multibyte-characters))
+ (if (and (not (featurep 'xemacs))
+ (boundp 'enable-multibyte-characters))
+ enable-multibyte-characters
+ (featurep 'mule)))
(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 mm-binary-coding-system)
- (coding-system-for-read mm-binary-coding-system)
- (coding-system-for-write mm-binary-coding-system))
- ,@forms))
- (and (buffer-name ,temp-buffer)
- (kill-buffer ,temp-buffer))))
- (setq-default enable-multibyte-characters ,multibyte))))))
+Use unibyte mode for this."
+ `(let (default-enable-multibyte-characters)
+ (with-temp-buffer ,@forms)))
(put 'mm-with-unibyte-buffer 'lisp-indent-function 0)
(put 'mm-with-unibyte-buffer 'edebug-form-spec '(body))
+(defmacro mm-with-unibyte-current-buffer (&rest forms)
+ "Evaluate FORMS with current current buffer temporarily made unibyte.
+Also bind `default-enable-multibyte-characters' to nil.
+Equivalent to `progn' in XEmacs"
+ (let ((buffer (make-symbol "buffer")))
+ `(if (and (not (featurep 'xemacs))
+ (boundp 'enable-multibyte-characters)
+ enable-multibyte-characters
+ (fboundp 'set-buffer-multibyte))
+ (let ((,buffer (current-buffer)))
+ (unwind-protect
+ (let (default-enable-multibyte-characters)
+ (set-buffer-multibyte nil)
+ ,@forms)
+ (set-buffer ,buffer)
+ (set-buffer-multibyte t)))
+ (let (default-enable-multibyte-characters)
+ ,@forms))))
+(put 'mm-with-unibyte-current-buffer 'lisp-indent-function 0)
+(put 'mm-with-unibyte-current-buffer 'edebug-form-spec '(body))
+
+(defmacro mm-with-unibyte-current-buffer-mule4 (&rest forms)
+ "Evaluate FORMS there like `progn' in current buffer.
+Mule4 only."
+ (let ((buffer (make-symbol "buffer")))
+ `(if (and (not (featurep 'xemacs))
+ (boundp 'enable-multibyte-characters)
+ enable-multibyte-characters
+ (fboundp 'set-buffer-multibyte)
+ (fboundp 'charsetp)
+ (not (charsetp 'eight-bit-control))) ;; For Emacs Mule 4 only.
+ (let ((,buffer (current-buffer)))
+ (unwind-protect
+ (let (default-enable-multibyte-characters)
+ (set-buffer-multibyte nil)
+ ,@forms)
+ (set-buffer ,buffer)
+ (set-buffer-multibyte t)))
+ (let (default-enable-multibyte-characters)
+ ,@forms))))
+(put 'mm-with-unibyte-current-buffer-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
+ ((and (mm-multibyte-p)
(fboundp 'find-charset-region))
- (find-charset-region b e))
- ((not (boundp 'current-language-environment))
+ ;; 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))
+ css))
+ (t
+ ;; We are in a unibyte buffer or XEmacs non-mule, so we futz around a bit.
(save-excursion
(save-restriction
(narrow-to-region b e)
(skip-chars-forward "\0-\177")
(if (eobp)
'(ascii)
- (delq nil (list 'ascii mail-parse-charset))))))
- (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)))))))))))
-
-(defun mm-read-charset (prompt)
- "Return a charset."
- (intern
- (completing-read
- prompt
- (mapcar (lambda (e) (list (symbol-name (car e))))
- mm-mime-mule-charset-alist)
- nil t)))
-
-(defun mm-quote-arg (arg)
- "Return a version of ARG that is safe to evaluate in a shell."
- (let ((pos 0) new-pos accum)
- ;; *** bug: we don't handle newline characters properly
- (while (setq new-pos (string-match "[]*[;!'`\"$\\& \t{} |()<>]" arg pos))
- (push (substring arg pos new-pos) accum)
- (push "\\" accum)
- (push (list (aref arg new-pos)) accum)
- (setq pos (1+ new-pos)))
- (if (= pos 0)
- arg
- (apply 'concat (nconc (nreverse accum) (list (substring arg pos)))))))
+ (let (charset)
+ (setq charset
+ (and (boundp 'current-language-environment)
+ (car (last (assq 'charset
+ (assoc current-language-environment
+ language-info-alist))))))
+ (if (eq charset 'ascii) (setq charset nil))
+ (or charset
+ (setq charset
+ (car (last (assq mail-parse-charset
+ mm-mime-mule-charset-alist)))))
+ (list 'ascii (or charset 'latin-iso8859-1)))))))))
+
+(if (fboundp 'shell-quote-argument)
+ (defalias 'mm-quote-arg 'shell-quote-argument)
+ (defun mm-quote-arg (arg)
+ "Return a version of ARG that is safe to evaluate in a shell."
+ (let ((pos 0) new-pos accum)
+ ;; *** bug: we don't handle newline characters properly
+ (while (setq new-pos (string-match "[]*[;!'`\"$\\& \t{} |()<>]" arg pos))
+ (push (substring arg pos new-pos) accum)
+ (push "\\" accum)
+ (push (list (aref arg new-pos)) accum)
+ (setq pos (1+ new-pos)))
+ (if (= pos 0)
+ arg
+ (apply 'concat (nconc (nreverse accum) (list (substring arg pos))))))))
(defun mm-auto-mode-alist ()
"Return an `auto-mode-alist' with only the .gz (etc) thingies."
(pop alist))
(nreverse out)))
-(defun mm-insert-file-contents (filename &optional visit beg end replace)
+(defvar mm-inhibit-file-name-handlers
+ '(jka-compr-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 (mm-auto-mode-alist))
+ (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))
+ (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
projects / gnus / blobdiff