X-Git-Url: http://git.chise.org/gitweb/?a=blobdiff_plain;f=lisp%2Fmm-util.el;h=f23c873d0e67740f07dd6d09de27868e97cdb00e;hb=3ad5943c4ad67b4f8d556436b31c3ca8bc4b5064;hp=c3fab985ee7d55d0079d45a1a7d6c0407d0695e9;hpb=7bb65c2e8117c313fb292bff969887315068cbc6;p=elisp%2Fgnus.git-

diff --git a/lisp/mm-util.el b/lisp/mm-util.el
index c3fab98..f23c873 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.
+;; Copyright (C) 1998,99 Free Software Foundation, Inc.
 
 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
 ;;	MORIOKA Tomohiko <morioka@jaist.ac.jp>
@@ -24,6 +24,8 @@
 
 ;;; Code:
 
+(require 'mail-prsvr)
+
 (defvar mm-mime-mule-charset-alist
   '((us-ascii ascii)
     (iso-8859-1 latin-iso8859-1)
@@ -36,15 +38,19 @@
     (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)
+    (viscii vietnamese-viscii-lower)
+    (iso-2022-jp latin-jisx0201 japanese-jisx0208 japanese-jisx0208-1978)
     (euc-kr korean-ksc5601)
     (cn-gb-2312 chinese-gb2312)
     (cn-big5 chinese-big5-1 chinese-big5-2)
+    (tibetan tibetan)
+    (thai-tis620 thai-tis620)
+    (iso-2022-7bit ethiopic arabic-1-column arabic-2-column)
     (iso-2022-jp-2 latin-iso8859-1 greek-iso8859-7
 		   latin-jisx0201 japanese-jisx0208-1978
 		   chinese-gb2312 japanese-jisx0208
-		   korean-ksc5601 japanese-jisx0212)
+		   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
@@ -61,61 +67,88 @@
 		    chinese-cns11643-7))
   "Alist of MIME-charset/MULE-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-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)))))))
 
 (eval-and-compile
-  (if (fboundp 'decode-coding-string)
-      (fset 'mm-decode-coding-string 'decode-coding-string)
-    (fset 'mm-decode-coding-string (lambda (s a) s)))
-
-  (if (fboundp 'encode-coding-string)
-      (fset 'mm-encode-coding-string 'encode-coding-string)
-    (fset 'mm-encode-coding-string (lambda (s a) s)))
-
-  (if (fboundp 'encode-coding-region)
-      (fset 'mm-encode-coding-region 'encode-coding-region)
-    (fset 'mm-encode-coding-region 'ignore))
-
-  (if (fboundp 'decode-coding-region)
-      (fset 'mm-decode-coding-region 'decode-coding-region)
-    (fset 'mm-decode-coding-region 'ignore))
-
-  (if (fboundp 'coding-system-list)
-      (fset 'mm-coding-system-list 'coding-system-list)
-    (fset 'mm-coding-system-list 'ignore))
-
-  (if (fboundp 'char-int)
-      (fset 'mm-char-int 'char-int)
-    (fset 'mm-char-int 'identity))
-
-  (if (fboundp 'coding-system-equal)
-      (fset 'mm-coding-system-equal 'coding-system-equal)
-    (fset 'mm-coding-system-equal 'equal))
-
-  (if (fboundp 'read-coding-system)
-      (fset 'mm-read-coding-system 'read-coding-system)
-    (defun mm-read-coding-system (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-charset-coding-system-alist
-  (let ((rest
-	 '((us-ascii . iso-8859-1)
-	   (gb2312 . cn-gb-2312)
-	   (iso-2022-jp-2 . iso-2022-7bit-ss2)
-	   (x-ctext . ctext)))
-	(systems (mm-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.")
+  (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 ()
+  "Get the coding system list."
+  (or mm-coding-system-list
+      (setq mm-coding-system-list (mm-coding-system-list))))
+
+(defvar mm-charset-synonym-alist
+  '((big5 . cn-big5)
+    (gb2312 . cn-gb-2312)
+    (x-ctext . ctext))
+  "A mapping from invalid charset names to the real charset names.")
+
+(defun mm-coding-system-p (sym)
+  "Return non-nil if SYM is a coding system."
+  (or (and (fboundp 'coding-system-p) (coding-system-p sym))
+      (memq sym (mm-get-coding-system-list))))
+
+(defvar mm-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."
@@ -136,17 +169,19 @@ 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))
+	(or (cdr (assq charset mm-charset-synonym-alist))
 	    charset))
   (when lbt
     (setq charset (intern (format "%s-%s" charset lbt))))
   (cond
    ;; Running in a non-MULE environment.
-   ((and (null (mm-coding-system-list))
-	 (eq charset 'iso-8859-1))
+   ((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-coding-system-list))
+   ((memq charset (mm-get-coding-system-list))
     charset)
    ;; Nope.
    (t
@@ -164,23 +199,290 @@ used as the line break code type of the coding system."
       (setq idx (1+ idx)))
     string))
 
-(defun mm-enable-multibyte ()
+(defsubst mm-enable-multibyte ()
   "Enable multibyte in the current buffer."
-  (when (fboundp 'set-buffer-multibyte)
+  (when (and (fboundp 'set-buffer-multibyte)
+             (boundp 'enable-multibyte-characters)
+	     (default-value 'enable-multibyte-characters))
     (set-buffer-multibyte t)))
 
-(defun mm-insert-rfc822-headers (charset encoding)
-  "Insert text/plain headers with CHARSET and ENCODING."
-  (insert "MIME-Version: 1.0\n")
-  (insert "Content-Type: text/plain; charset=\""
-	  (downcase (symbol-name charset)) "\"\n")
-  (insert "Content-Transfer-Encoding: "
-	  (downcase (symbol-name encoding)) "\n"))
-
-(defun mm-content-type-charset (header)
-  "Return the charset parameter from HEADER."
-  (when (string-match "charset *= *\"? *\\([-0-9a-zA-Z_]+\\)\"? *$" header)
-    (intern (downcase (match-string 1 header)))))
+(defsubst mm-disable-multibyte ()
+  "Disable multibyte in the current buffer."
+  (when (fboundp 'set-buffer-multibyte)
+    (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 '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 ((charset (cond 
+		  ((fboundp 'charset-after)
+		   (charset-after pos))
+		  ((fboundp 'char-charset)
+		   (char-charset (char-after pos)))
+		  ((< (mm-char-int (char-after pos)) 128)
+		   'ascii)
+		  (mail-parse-mule-charset ;; cached mule-charset
+		   mail-parse-mule-charset)
+		  ((boundp 'current-language-environment)
+		   (let ((entry (assoc current-language-environment 
+				       language-info-alist)))
+		     (setq mail-parse-mule-charset
+			   (or (car (last (assq 'charset entry)))
+			       'latin-iso8859-1))))
+		  (t                       ;; figure out the charset
+		   (setq mail-parse-mule-charset
+			 (or (car (last (assq mail-parse-charset
+					      mm-mime-mule-charset-alist)))
+			     'latin-iso8859-1))))))
+    (if (eq charset 'composition)
+	(let ((p (or pos (point))))
+	  (cadr (find-charset-region p (1+ p))))
+      charset)))
+
+(defun mm-mime-charset (charset)
+  "Return the MIME charset corresponding to the MULE CHARSET."
+  (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)))
+
+(defun mm-find-mime-charset-region (b e)
+  "Return the MIME charsets needed to encode the region between B and E."
+  (let ((charsets (mapcar 'mm-mime-charset
+			  (delq 'ascii
+				(mm-find-charset-region b e)))))
+    (when (memq 'iso-2022-jp-2 charsets)
+      (setq charsets (delq 'iso-2022-jp charsets)))
+    (setq charsets (mm-delete-duplicates charsets))
+    (if (and (> (length charsets) 1)
+	     (fboundp 'find-coding-systems-region)
+	     (memq 'utf-8 (find-coding-systems-region b e)))
+	'(utf-8)
+      charsets)))
+
+(defsubst mm-multibyte-p ()
+  "Say whether multibyte is enabled."
+  (or (string-match "XEmacs\\|Lucid" emacs-version)
+      (and (boundp 'enable-multibyte-characters)
+	   enable-multibyte-characters)))
+
+(defmacro mm-with-unibyte-buffer (&rest forms)
+  "Create a temporary buffer, and evaluate FORMS there like `progn'.
+See also `with-temp-file' and `with-output-to-string'."
+  (let ((temp-buffer (make-symbol "temp-buffer"))
+	(multibyte (make-symbol "multibyte")))
+    `(if (or (string-match "XEmacs\\|Lucid" emacs-version)
+	     (not (boundp 'enable-multibyte-characters)))
+	 (with-temp-buffer ,@forms)
+       (let ((,multibyte (default-value 'enable-multibyte-characters))
+	     ,temp-buffer)
+	 (unwind-protect
+	     (progn
+	       (setq-default enable-multibyte-characters nil)
+	       (setq ,temp-buffer
+		     (get-buffer-create (generate-new-buffer-name " *temp*")))
+	       (unwind-protect
+		   (with-current-buffer ,temp-buffer
+		     (let ((buffer-file-coding-system mm-binary-coding-system)
+			   (coding-system-for-read mm-binary-coding-system)
+			   (coding-system-for-write mm-binary-coding-system))
+		       ,@forms))
+		 (and (buffer-name ,temp-buffer)
+		      (kill-buffer ,temp-buffer))))
+	   (setq-default enable-multibyte-characters ,multibyte))))))
+(put 'mm-with-unibyte-buffer 'lisp-indent-function 0)
+(put 'mm-with-unibyte-buffer 'edebug-form-spec '(body))
+
+(defmacro mm-with-unibyte-current-buffer (&rest forms)
+  "Evaluate FORMS there like `progn' in current buffer."
+  (let ((multibyte (make-symbol "multibyte")))
+    `(if (or (string-match "XEmacs\\|Lucid" emacs-version)
+	     (not (fboundp 'set-buffer-multibyte)))
+	 (progn
+	   ,@forms)
+       (let ((,multibyte (default-value 'enable-multibyte-characters)))
+	 (unwind-protect
+	     (let ((buffer-file-coding-system mm-binary-coding-system)
+		   (coding-system-for-read mm-binary-coding-system)
+		   (coding-system-for-write mm-binary-coding-system))
+	       (set-buffer-multibyte nil)
+	       ,@forms)
+	   (set-buffer-multibyte ,multibyte))))))
+(put 'mm-with-unibyte-current-buffer 'lisp-indent-function 0)
+(put 'mm-with-unibyte-current-buffer 'edebug-form-spec '(body))
+
+(defmacro mm-with-unibyte (&rest forms)
+  "Set default `enable-multibyte-characters' to `nil', eval the FORMS."
+  (let ((multibyte (make-symbol "multibyte")))
+    `(if (or (string-match "XEmacs\\|Lucid" emacs-version)
+	     (not (boundp 'enable-multibyte-characters)))
+	 (progn ,@forms)
+       (let ((,multibyte (default-value 'enable-multibyte-characters)))
+	 (unwind-protect
+	     (progn
+	       (setq-default enable-multibyte-characters nil)
+	       ,@forms)
+	   (setq-default enable-multibyte-characters ,multibyte))))))
+(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."
+  (cond
+   ((and (mm-multibyte-p)
+ 	 (fboundp 'find-charset-region))
+    ;; Remove composition since the base charsets have been included.
+    (delq 'composition (find-charset-region b e)))
+   ((not (boundp 'current-language-environment))
+    (save-excursion
+      (save-restriction
+	(narrow-to-region b e)
+	(goto-char (point-min))
+	(skip-chars-forward "\0-\177")
+	(if (eobp)
+	    '(ascii)
+	  (delq nil (list 'ascii 
+			  (or (car (last (assq mail-parse-charset
+					       mm-mime-mule-charset-alist)))
+			      'latin-iso8859-1)))))))
+   (t
+    ;; We are in a unibyte buffer, so we futz around a bit.
+    (save-excursion
+      (save-restriction
+	(narrow-to-region b e)
+	(goto-char (point-min))
+	(let ((entry (assoc current-language-environment 
+			    language-info-alist)))
+	  (skip-chars-forward "\0-\177")
+	  (if (eobp)
+	      '(ascii)
+	    (delq nil (list 'ascii 
+			    (or (car (last (assq 'charset entry)))
+				'latin-iso8859-1))))))))))
+
+(defun mm-read-charset (prompt)
+  "Return a charset."
+  (intern
+   (completing-read
+    prompt
+    (mapcar (lambda (e) (list (symbol-name (car e))))
+	    mm-mime-mule-charset-alist)
+    nil t)))
+
+(defun mm-quote-arg (arg)
+  "Return a version of ARG that is safe to evaluate in a shell."
+  (let ((pos 0) new-pos accum)
+    ;; *** bug: we don't handle newline characters properly
+    (while (setq new-pos (string-match "[]*[;!'`\"$\\& \t{} |()<>]" arg pos))
+      (push (substring arg pos new-pos) accum)
+      (push "\\" accum)
+      (push (list (aref arg new-pos)) accum)
+      (setq pos (1+ new-pos)))
+    (if (= pos 0)
+        arg
+      (apply 'concat (nconc (nreverse accum) (list (substring arg pos)))))))
+
+(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)
+  "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)))
 
 (provide 'mm-util)