X-Git-Url: https://cgit.sxemacs.org/?a=blobdiff_plain;f=lisp%2Fmm-util.el;h=74cd23f5edd2d64e3d3e72f868f45559101306cc;hb=cc9de211a627a2a8456ff0d4c0e62c161ad5240c;hp=966cb91887f46036bc7cc50b715af1d92e6f3e6c;hpb=ccb621a7efd32d36ae5171426338d575451ea6cb;p=gnus

diff --git a/lisp/mm-util.el b/lisp/mm-util.el
index 966cb9188..74cd23f5e 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) 1998,99 Free Software Foundation, Inc.
+;; Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
 
 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
 ;;	MORIOKA Tomohiko <morioka@jaist.ac.jp>
@@ -24,27 +24,7 @@
 
 ;;; Code:
 
-(defvar mm-running-xemacs (string-match "XEmacs" emacs-version))
-
-(defvar mm-running-ntemacs
-  (and (not mm-running-xemacs)
-       (string-match "nt\\|windows" system-configuration)))
-
-(defvar mm-binary-coding-system
-  (if mm-running-xemacs
-      'binary 'no-conversion)
-  "100% binary coding system.")
-
-(defvar mm-text-coding-system
-  (cond
-   ((not (fboundp 'coding-system-p)) nil)
-   (mm-running-xemacs  ;; XEmacs
-    'no-conversion)
-   (mm-running-ntemacs ;; NTEmacs
-    (and (coding-system-p 'raw-text-dos) 'raw-text-dos))
-   ((coding-system-p 'raw-text) 'raw-text) ;; Emacs
-   (t nil))
-  "100% text coding system, for removing ^M.")
+(require 'mail-prsvr)
 
 (defvar mm-mime-mule-charset-alist
   '((us-ascii ascii)
@@ -53,15 +33,16 @@
     (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)
     (viscii vietnamese-viscii-lower)
-    (iso-2022-jp-2 japanese-jisx0208)
-    (iso-2022-jp latin-jisx0201
-		 japanese-jisx0208-1978)
+    (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)
@@ -86,17 +67,17 @@
 		    chinese-cns11643-1 chinese-cns11643-2
 		    chinese-cns11643-3 chinese-cns11643-4
 		    chinese-cns11643-5 chinese-cns11643-6
-		    chinese-cns11643-7))
+		    chinese-cns11643-7)
+    (utf-8 unicode-a unicode-b unicode-c unicode-d unicode-e))
   "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)
@@ -117,6 +98,13 @@
 	   prompt (mapcar (lambda (s) (list (symbol-name (car s))))
 			  mm-mime-mule-charset-alist)))))))
 
+(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 ()
   "Get the coding system list."
@@ -129,6 +117,39 @@
     (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:
@@ -185,6 +206,7 @@ used as the line break code type of the coding system."
 (defsubst mm-enable-multibyte ()
   "Enable multibyte in the current buffer."
   (when (and (fboundp 'set-buffer-multibyte)
+             (boundp 'enable-multibyte-characters)
 	     (default-value 'enable-multibyte-characters))
     (set-buffer-multibyte t)))
 
@@ -193,41 +215,92 @@ used as the line break code type of the coding system."
   (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 (fboundp 'coding-system-get)
+  (if (and (fboundp 'coding-system-get) (fboundp 'get-charset-property))
       ;; This exists in Emacs 20.
       (or
-       (and (get-charset-property charset 'prefered-coding-system)
+       (and (mm-preferred-coding-system charset)
 	    (coding-system-get
-	     (get-charset-property charset 'prefered-coding-system)
-	     'mime-charset))
+	     (mm-preferred-coding-system charset) 'mime-charset))
        (and (eq charset 'ascii)
 	    'us-ascii)
-       (get-charset-property charset 'prefered-coding-system)
+       (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)))))
-    (delete-duplicates charsets)))
+  (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."
-  (and (boundp 'enable-multibyte-characters)
-       enable-multibyte-characters))
+  (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 (not (boundp 'enable-multibyte-characters))
+    `(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)
@@ -248,13 +321,48 @@ See also `with-temp-file' and `with-output-to-string'."
 (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)
+	       (setq-default enable-multibyte-characters nil)
+	       ,@forms)
+	   (setq-default enable-multibyte-characters ,multibyte)
+	   (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 (boundp 'enable-multibyte-characters)
- 	 enable-multibyte-characters
+   ((and (mm-multibyte-p)
  	 (fboundp 'find-charset-region))
-    (find-charset-region b e))
+    ;; 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
@@ -263,19 +371,24 @@ See also `with-temp-file' and `with-output-to-string'."
 	(skip-chars-forward "\0-\177")
 	(if (eobp)
 	    '(ascii)
-	  (delq nil (list 'ascii mail-parse-charset))))))
+	  (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 (capitalize current-language-environment)
+	(let ((entry (assoc current-language-environment 
 			    language-info-alist)))
 	  (skip-chars-forward "\0-\177")
 	  (if (eobp)
 	      '(ascii)
-	    (list 'ascii (car (last (assq 'charset entry)))))))))))
+	    (delq nil (list 'ascii 
+			    (or (car (last (assq 'charset entry)))
+				'latin-iso8859-1))))))))))
 
 (defun mm-read-charset (prompt)
   "Return a charset."
@@ -299,6 +412,84 @@ See also `with-temp-file' and `with-output-to-string'."
         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)
 
 ;;; mm-util.el ends here