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+;;; gnus-mh.el --- mh-e interface for Gnus
+;; Copyright (C) 1994,95 Free Software Foundation, Inc.
+
+;; Author: Masanobu UMEDA <umerin@flab.flab.fujitsu.junet>
+;;	Lars Magne Ingebrigtsen <larsi@ifi.uio.no>
+;; Keywords: news
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 2, or (at your option)
+;; any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs; see the file COPYING.  If not, write to
+;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+;;; Commentary:
+
+;;; Send mail using mh-e.
+
+;; The following mh-e interface is all cooperative works of
+;; tanaka@flab.fujitsu.CO.JP (TANAKA Hiroshi), kawabe@sra.CO.JP
+;; (Yoshikatsu Kawabe), and shingu@casund.cpr.canon.co.jp (Toshiaki
+;; SHINGU).
+
+;;; Code:
+
+(require 'mh-e)
+(require 'mh-comp)
+(require 'gnus)
+(require 'gnus-msg)
+
+(defun gnus-summary-save-article-folder (&optional arg)
+  "Append the current article to an mh folder.
+If N is a positive number, save the N next articles.
+If N is a negative number, save the N previous articles.
+If N is nil and any articles have been marked with the process mark,
+save those articles instead."
+  (interactive "P")
+  (let ((gnus-default-article-saver 'gnus-summary-save-in-folder))
+    (gnus-summary-save-article arg)))
+
+(defun gnus-summary-save-in-folder (&optional folder)
+  "Save this article to MH folder (using `rcvstore' in MH library).
+Optional argument FOLDER specifies folder name."
+  ;; Thanks to yuki@flab.Fujitsu.JUNET and ohm@kaba.junet.
+  (mh-find-path)
+  (let ((folder
+	 (or folder
+	     (mh-prompt-for-folder 
+	      "Save article in"
+	      (funcall gnus-folder-save-name gnus-newsgroup-name
+		       gnus-current-headers gnus-newsgroup-last-folder)
+	      t)))
+	(errbuf (get-buffer-create " *Gnus rcvstore*")))
+    (gnus-eval-in-buffer-window 
+     gnus-article-buffer
+     (save-restriction
+       (widen)
+       (unwind-protect
+	   (call-process-region (point-min) (point-max)
+				(expand-file-name "rcvstore" mh-lib)
+				nil errbuf nil folder)
+	 (set-buffer errbuf)
+	 (if (zerop (buffer-size))
+	     (message "Article saved in folder: %s" folder)
+	   (message "%s" (buffer-string)))
+	 (kill-buffer errbuf))))
+    (setq gnus-newsgroup-last-folder folder)))
+
+(defun gnus-mail-reply-using-mhe (&optional yank)
+  "Compose reply mail using mh-e.
+Optional argument YANK means yank original article.
+The command \\[mh-yank-cur-msg] yank the original message into current buffer."
+  (let (from cc subject date to reply-to to-userid orig-to
+	     references message-id
+	     (config (current-window-configuration))
+	     buffer)
+    (pop-to-buffer gnus-article-buffer)
+    (setq buffer (current-buffer))
+    (save-excursion
+      (save-restriction
+	(or gnus-user-login-name	; we need this
+	    (setq gnus-user-login-name (or (getenv "USER")
+					   (getenv "LOGNAME"))))
+
+	(gnus-article-show-all-headers);; so colors are happy
+	;; lots of junk to avoid mh-send deleting other windows
+	(setq from (or (gnus-fetch-field "from") "")
+	      subject (let ((subject (or (gnus-fetch-field "subject")
+					 "(None)")))
+			(if (and subject
+				 (not (string-match "^[Rr][Ee]:.+$" subject)))
+			    (concat "Re: " subject) subject))
+	      reply-to (gnus-fetch-field "reply-to")
+	      cc (gnus-fetch-field "cc")
+	      orig-to (or (gnus-fetch-field "to") "")
+	      date (gnus-fetch-field "date")
+	      references (gnus-fetch-field "references")
+	      message-id (gnus-fetch-field "message-id"))
+	(setq to (or reply-to from))
+	(setq to-userid (mail-strip-quoted-names orig-to))
+	(if (or (string-match "," orig-to)
+		(not (string-match (substring to-userid 0 
+					      (string-match "@" to-userid))
+				   gnus-user-login-name)))
+	    (setq cc (concat (if cc (concat cc ", ") "") orig-to)))
+        ;; mh-yank-cur-msg needs to have mh-show-buffer set in the 
+        ;; *Article* buffer
+	(setq mh-show-buffer buffer)))
+
+    (mh-find-path)
+    (mh-send-sub (or to "") (or cc "") 
+		 (or subject "(None)") config);; Erik Selberg 1/23/94
+
+    (let ((draft (current-buffer))
+	  (gnus-mail-buffer (current-buffer))
+	  mail-buf)
+      (if (not yank)
+	  (gnus-configure-windows 'reply 'force)
+	(gnus-configure-windows 'reply-yank 'force))
+      (setq mail-buf gnus-mail-buffer)
+      (pop-to-buffer mail-buf);; always in the display, so won't have window probs
+      (switch-to-buffer draft))
+
+    ;;    (mh-send to (or cc "") subject);; shouldn't use according to mhe
+    
+    ;; note - current buffer is now draft!
+    (save-excursion
+      (mh-insert-fields
+       "In-reply-to:"
+       (concat
+	(substring from 0 (string-match "  *at \\|  *@ \\| *(\\| *<" from))
+	"'s message of " date))
+      (nnheader-insert-references references message-id))
+
+    ;; need this for mh-yank-cur-msg
+    (setq mh-sent-from-folder buffer)
+    (setq mh-sent-from-msg 1)
+    (setq mh-show-buffer buffer)
+    (setq mh-previous-window-config config))
+
+  ;; Then, yank original article if requested.
+  (if yank
+      (let ((last (point)))
+	(mh-yank-cur-msg)
+	(goto-char last)))
+
+  (run-hooks 'gnus-mail-hook))
+
+
+;; gnus-mail-forward-using-mhe is contributed by Jun-ichiro Itoh
+;; <itojun@ingram.mt.cs.keio.ac.jp>
+
+(defun gnus-mail-forward-using-mhe (&optional buffer)
+  "Forward the current message to another user using mh-e."
+  ;; First of all, prepare mhe mail buffer.
+  (let* ((to (read-string "To: "))
+	 (cc (read-string "Cc: "))
+	 (buffer (or buffer gnus-article-buffer))
+	 (config (current-window-configuration));; need to add this - erik
+	 (subject (gnus-forward-make-subject buffer)))
+    (setq mh-show-buffer buffer)
+    (mh-find-path)
+    (mh-send-sub to (or cc "") (or subject "(None)") config);; Erik Selberg 1/23/94
+    (let ((draft (current-buffer))
+	  (gnus-mail-buffer (current-buffer))
+	  mail-buf)
+      (gnus-configure-windows 'reply-yank 'force)
+      (setq mail-buf (eval (cdr (assq 'mail gnus-window-to-buffer))))
+      (pop-to-buffer mail-buf);; always in the display, so won't have window probs
+      (switch-to-buffer draft)
+      )
+    (save-excursion
+      (goto-char (point-max))
+      (insert "\n------- Forwarded Message\n\n")
+      (insert-buffer buffer)
+      (goto-char (point-max))
+      (insert "\n------- End of Forwarded Message\n")
+      (setq mh-sent-from-folder buffer)
+      (setq mh-sent-from-msg 1)
+      (setq mh-previous-window-config config)
+      (run-hooks 'gnus-mail-hook)
+      )))
+
+(defun gnus-mail-other-window-using-mhe ()
+  "Compose mail other window using mh-e."
+  (let ((to (read-string "To: "))
+	(cc (read-string "Cc: "))
+	(subject (read-string "Subject: ")))
+    (gnus-article-show-all-headers)	;I don't think this is really needed.
+    (setq mh-show-buffer (current-buffer))
+    (mh-find-path)
+    (mh-send-other-window to cc subject)
+    (setq mh-sent-from-folder (current-buffer))
+    (setq mh-sent-from-msg 1)
+    (run-hooks 'gnus-mail-hook)))
+
+(defun gnus-Folder-save-name (newsgroup headers &optional last-folder)
+  "Generate folder name from NEWSGROUP, HEADERS, and optional LAST-FOLDER.
+If variable `gnus-use-long-file-name' is nil, it is +News.group.
+Otherwise, it is like +news/group."
+  (or last-folder
+      (concat "+"
+	      (if gnus-use-long-file-name
+		  (gnus-capitalize-newsgroup newsgroup)
+		(gnus-newsgroup-directory-form newsgroup)))))
+
+(defun gnus-folder-save-name (newsgroup headers &optional last-folder)
+  "Generate folder name from NEWSGROUP, HEADERS, and optional LAST-FOLDER.
+If variable `gnus-use-long-file-name' is nil, it is +news.group.
+Otherwise, it is like +news/group."
+  (or last-folder
+      (concat "+"
+	      (if gnus-use-long-file-name
+		  newsgroup
+		(gnus-newsgroup-directory-form newsgroup)))))
+
+;;; gnus-mh.el ends here