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+;;; mh-comp --- mh-e functions for composing messages
+;; Time-stamp: <94/03/08 10:05:20 gildea>
+
+;; Copyright 1993 Free Software Foundation, Inc.
+
+;; This file is part of mh-e.
+
+;; mh-e 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.
+
+;; mh-e 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 mh-e; see the file COPYING. If not, write to
+;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+;;; Commentary:
+
+;; Internal support for mh-e package.
+
+;;; Code:
+
+(provide 'mh-comp)
+(require 'mh-utils)
+
+(defvar mh-note-repl "-"
+ "String whose first character is used to notate replied to messages.")
+
+(defvar mh-note-forw "F"
+ "String whose first character is used to notate forwarded messages.")
+
+(defvar mh-note-dist "R"
+ "String whose first character is used to notate redistributed messages.")
+
+(defvar mh-send-prog "send"
+ "Name of the MH send program.
+Some sites need to change this because of a name conflict.")
+
+(defvar mh-yank-hooks nil
+ "Obsolete hook for modifying a citation just inserted in the mail buffer.
+Each hook function can find the citation between point and mark.
+And each hook function should leave point and mark around the citation
+text as modified.
+
+This is a normal hook, misnamed for historical reasons.
+It is semi-obsolete and is only used if mail-citation-hook is nil.")
+
+(defvar mail-citation-hook nil
+ "*Hook for modifying a citation just inserted in the mail buffer.
+Each hook function can find the citation between point and mark.
+And each hook function should leave point and mark around the citation
+text as modified.
+
+If this hook is entirely empty (nil), the text of the message is inserted
+with mh-ins-buf-prefix prefixed to each line.
+
+See also the variable mh-yank-from-start-of-msg, which controls how
+much of the message passed to the hook.")
+
+;;; Copied from sendmail.el for Hyperbole
+(defvar mail-header-separator "--------"
+ "*Line used by MH to separate headers from text in messages being composed.")
+
+;;; Personal preferences:
+
+(defvar mh-delete-yanked-msg-window nil
+ "*Controls window display when a message is yanked by \\<mh-letter-mode-map>\\[mh-yank-cur-msg].
+If non-nil, yanking the current message into a draft letter deletes any
+windows displaying the message.")
+
+(defvar mh-yank-from-start-of-msg t
+ "*Controls which part of a message is yanked by \\<mh-letter-mode-map>\\[mh-yank-cur-msg].
+If non-nil, include the entire message. If the symbol `body', then yank the
+message minus the header. If nil, yank only the portion of the message
+following the point. If the show buffer has a region, this variable is
+ignored.")
+
+(defvar mh-reply-default-reply-to nil
+ "*Sets the person or persons to whom a reply will be sent.
+If nil, prompt for recipient. If non-nil, then \\<mh-folder-mode-map>`\\[mh-reply]' will use this
+value and it should be one of \"from\", \"to\", or \"cc\".")
+
+(defvar mh-signature-file-name "~/.signature"
+ "*Name of file containing the user's signature.
+Inserted into message by \\<mh-letter-mode-map>\\[mh-insert-signature].")
+
+(defvar mh-forward-subject-format "%s: %s"
+ "*Format to generate the Subject: line contents for a forwarded message.
+The two string arguments to the format are the sender of the original
+message and the original subject line.")
+
+(defvar mh-comp-formfile "components"
+ "Name of file to be used as a skeleton for composing messages.
+Default is \"components\". If not a complete path name, the file
+is searched for first in the user's MH directory, then in the
+system MH lib directory.")
+
+;;; Hooks:
+
+(defvar mh-letter-mode-hook nil
+ "Invoked in `mh-letter-mode' on a new letter.")
+
+(defvar mh-compose-letter-function nil
+ "Invoked in `mh-compose-and-send-mail' on a draft letter.
+It is passed three arguments: TO recipients, SUBJECT, and CC recipients.")
+
+(defvar mh-before-send-letter-hook nil
+ "Invoked at the beginning of the \\<mh-letter-mode-map>\\[mh-send-letter] command.")
+
+
+(defvar mh-rejected-letter-start
+ (concat "^ ----- Unsent message follows -----$" ;from mail system
+ "\\|^------- Unsent Draft$" ;from MH itself
+ "\\|^---------- Original Message ----------$" ;from zmailer
+ "\\|^ --- The unsent message follows ---$" ;from AIX mail system
+ "\\|^ Your message follows:$") ;from MMDF-II
+ "Regexp specifying the beginning of the wrapper around a returned letter.
+This wrapper is generated by the mail system when rejecting a letter.")
+
+(defvar mh-new-draft-cleaned-headers
+ "^Date:\\|^Received:\\|^Message-Id:\\|^From:\\|^Sender:\\|^Delivery-Date:\\|^Return-Path:"
+ "Regexp of header lines to remove before offering a message as a new draft.
+Used by the \\<mh-folder-mode-map>`\\[mh-edit-again]' and `\\[mh-extract-rejected-mail]' commands.")
+
+(defvar mh-to-field-choices '((?t . "To:") (?s . "Subject:") (?c . "Cc:")
+ (?b . "Bcc:") (?f . "Fcc:"))
+ "Alist of (final-character . field-name) choices for mh-to-field.")
+
+(defvar mh-letter-mode-map (copy-keymap text-mode-map)
+ "Keymap for composing mail.")
+
+(defvar mh-letter-mode-syntax-table nil
+ "Syntax table used by mh-e while in MH-Letter mode.")
+
+(if mh-letter-mode-syntax-table
+ ()
+ (setq mh-letter-mode-syntax-table
+ (make-syntax-table text-mode-syntax-table))
+ (modify-syntax-entry ?% "." mh-letter-mode-syntax-table))
+
+
+;;;###autoload
+(defun mh-smail ()
+ "Compose and send mail with the MH mail system.
+This function is an entry point to mh-e, the Emacs front end
+to the MH mail system."
+ (interactive)
+ (mh-find-path)
+ (call-interactively 'mh-send))
+
+
+(defun mh-edit-again (msg)
+ "Clean-up a draft or a message previously sent and make it resendable.
+The variable mh-new-draft-cleaned-headers specifies the headers to remove.
+See also documentation for `\\[mh-send]' function."
+ (interactive (list (mh-get-msg-num t)))
+ (let* ((from-folder mh-current-folder)
+ (config (current-window-configuration))
+ (draft
+ (cond ((and mh-draft-folder (equal from-folder mh-draft-folder))
+ (pop-to-buffer (find-file-noselect (mh-msg-filename msg)) t)
+ (rename-buffer (format "draft-%d" msg))
+ (buffer-name))
+ (t
+ (mh-read-draft "clean-up" (mh-msg-filename msg) nil)))))
+ (mh-clean-msg-header (point-min) mh-new-draft-cleaned-headers nil)
+ (goto-char (point-min))
+ (set-buffer-modified-p nil)
+ (mh-compose-and-send-mail draft "" from-folder nil nil nil nil nil nil
+ config)))
+
+
+(defun mh-extract-rejected-mail (msg)
+ "Extract a letter returned by the mail system and make it resendable.
+Default is the displayed message. The variable mh-new-draft-cleaned-headers
+gives the headers to clean out of the original message.
+See also documentation for `\\[mh-send]' function."
+ (interactive (list (mh-get-msg-num t)))
+ (let ((from-folder mh-current-folder)
+ (config (current-window-configuration))
+ (draft (mh-read-draft "extraction" (mh-msg-filename msg) nil)))
+ (goto-char (point-min))
+ (cond ((re-search-forward mh-rejected-letter-start nil t)
+ (skip-chars-forward " \t\n")
+ (delete-region (point-min) (point))
+ (mh-clean-msg-header (point-min) mh-new-draft-cleaned-headers nil))
+ (t
+ (message "Does not appear to be a rejected letter.")))
+ (goto-char (point-min))
+ (set-buffer-modified-p nil)
+ (mh-compose-and-send-mail draft "" from-folder msg (mh-get-field "To:")
+ (mh-get-field "From:") (mh-get-field "Cc:")
+ nil nil config)))
+
+
+(defun mh-forward (to cc &optional msg-or-seq)
+ "Forward a message or message sequence. Defaults to displayed message.
+If optional prefix argument provided, then prompt for the message sequence.
+See also documentation for `\\[mh-send]' function."
+ (interactive (list (mh-read-address "To: ")
+ (mh-read-address "Cc: ")
+ (if current-prefix-arg
+ (mh-read-seq-default "Forward" t)
+ (mh-get-msg-num t))))
+ (or msg-or-seq
+ (setq msg-or-seq (mh-get-msg-num t)))
+ (let* ((folder mh-current-folder)
+ (config (current-window-configuration))
+ ;; forw always leaves file in "draft" since it doesn't have -draft
+ (draft-name (expand-file-name "draft" mh-user-path))
+ (draft (cond ((or (not (file-exists-p draft-name))
+ (y-or-n-p "The file 'draft' exists. Discard it? "))
+ (mh-exec-cmd "forw"
+ "-build" mh-current-folder msg-or-seq)
+ (prog1
+ (mh-read-draft "" draft-name t)
+ (mh-insert-fields "To:" to "Cc:" cc)
+ (set-buffer-modified-p nil)))
+ (t
+ (mh-read-draft "" draft-name nil)))))
+ (goto-char (point-min))
+ (re-search-forward "^------- Forwarded Message")
+ (forward-line -1)
+ (narrow-to-region (point) (point-max))
+ (let ((orig-from (save-excursion (mh-get-field "From:")))
+ (orig-subject (save-excursion (mh-get-field "Subject:"))))
+ (widen)
+ (let ((forw-subject
+ (mh-forwarded-letter-subject orig-from orig-subject)))
+ (save-excursion (mh-insert-fields "Subject:" forw-subject))
+ (delete-other-windows)
+ (if (numberp msg-or-seq)
+ (mh-add-msgs-to-seq msg-or-seq 'forwarded t)
+ (mh-add-msgs-to-seq (mh-seq-to-msgs msg-or-seq) 'forwarded t))
+ (mh-compose-and-send-mail draft "" folder msg-or-seq
+ to forw-subject cc
+ mh-note-forw "Forwarded:"
+ config)))))
+
+(defun mh-forwarded-letter-subject (from subject)
+ ;; Return a Subject suitable for a forwarded message.
+ ;; Original message has headers FROM and SUBJECT.
+ (let ((addr-start (string-match "<" from))
+ (comment (string-match "(" from)))
+ (cond ((and addr-start (> addr-start 0))
+ ;; Full Name <luser@host>
+ (setq from (substring from 0 (1- addr-start))))
+ (comment
+ ;; luser@host (Full Name)
+ (setq from (substring from (1+ comment) (1- (length from)))))))
+ (format mh-forward-subject-format from subject))
+
+
+;;;###autoload
+(defun mh-smail-other-window ()
+ "Compose and send mail in other window with the MH mail system.
+This function is an entry point to mh-e, the Emacs front end
+to the MH mail system."
+ (interactive)
+ (mh-find-path)
+ (call-interactively 'mh-send-other-window))
+
+
+(defun mh-redistribute (to cc &optional msg)
+ "Redistribute a letter.
+Depending on how your copy of MH was compiled, you may need to change the
+setting of the variable mh-redist-full-contents. See its documentation."
+ (interactive (list (mh-read-address "Redist-To: ")
+ (mh-read-address "Redist-Cc: ")
+ (mh-get-msg-num t)))
+ (or msg
+ (setq msg (mh-get-msg-num t)))
+ (save-window-excursion
+ (let ((folder mh-current-folder)
+ (draft (mh-read-draft "redistribution"
+ (if mh-redist-full-contents
+ (mh-msg-filename msg)
+ nil)
+ nil)))
+ (mh-goto-header-end 0)
+ (insert "Resent-To: " to "\n")
+ (if (not (equal cc "")) (insert "Resent-cc: " cc "\n"))
+ (mh-clean-msg-header (point-min)
+ "^Message-Id:\\|^Received:\\|^Return-Path:\\|^Sender:\\|^Date:\\|^From:"
+ nil)
+ (save-buffer)
+ (message "Redistributing...")
+ (if mh-redist-full-contents
+ (call-process "/bin/sh" nil 0 nil "-c"
+ (format "mhdist=1 mhaltmsg=%s %s -push %s"
+ (buffer-file-name)
+ (expand-file-name mh-send-prog mh-progs)
+ (buffer-file-name)))
+ (call-process "/bin/sh" nil 0 nil "-c"
+ (format "mhdist=1 mhaltmsg=%s mhannotate=1 %s -push %s"
+ (mh-msg-filename msg folder)
+ (expand-file-name mh-send-prog mh-progs)
+ (buffer-file-name))))
+ (mh-annotate-msg msg folder mh-note-dist
+ "-component" "Resent:"
+ "-text" (format "\"%s %s\"" to cc))
+ (kill-buffer draft)
+ (message "Redistributing...done"))))
+
+
+(defun mh-reply (msg &optional includep)
+ "Reply to a MESSAGE (default: displayed message).
+If optional prefix argument INCLUDEP provided, then include the message
+in the reply using filter mhl.reply in your MH directory.
+Prompts for type of addresses to reply to:
+ from sender only,
+ to sender and primary recipients,
+ cc/all sender and all recipients.
+See also documentation for `\\[mh-send]' function."
+ (interactive (list (mh-get-msg-num t) current-prefix-arg))
+ (let ((minibuffer-help-form
+ "from => Sender only\nto => Sender and primary recipients\ncc or all => Sender and all recipients"))
+ (let ((reply-to (or mh-reply-default-reply-to
+ (completing-read "Reply to whom: "
+ '(("from") ("to") ("cc") ("all"))
+ nil
+ t)))
+ (folder mh-current-folder)
+ (show-buffer mh-show-buffer)
+ (config (current-window-configuration)))
+ (message "Composing a reply...")
+ (mh-exec-cmd "repl" "-build" "-noquery" "-nodraftfolder"
+ mh-current-folder msg
+ (cond ((or (equal reply-to "from") (equal reply-to ""))
+ '("-nocc" "all"))
+ ((equal reply-to "to")
+ '("-cc" "to"))
+ ((or (equal reply-to "cc") (equal reply-to "all"))
+ '("-cc" "all" "-nocc" "me")))
+ (if includep
+ '("-filter" "mhl.reply")))
+ (let ((draft (mh-read-draft "reply"
+ (expand-file-name "reply" mh-user-path)
+ t)))
+ (delete-other-windows)
+ (set-buffer-modified-p nil)
+
+ (let ((to (mh-get-field "To:"))
+ (subject (mh-get-field "Subject:"))
+ (cc (mh-get-field "Cc:")))
+ (goto-char (point-min))
+ (mh-goto-header-end 1)
+ (or includep
+ (mh-in-show-buffer (show-buffer)
+ (mh-display-msg msg folder)))
+ (mh-add-msgs-to-seq msg 'answered t)
+ (message "Composing a reply...done")
+ (mh-compose-and-send-mail draft "" folder msg to subject cc
+ mh-note-repl "Replied:" config))))))
+
+
+(defun mh-send (to cc subject)
+ "Compose and send a letter.
+The file named by `mh-comp-formfile' will be used as the form.
+The letter is composed in mh-letter-mode; see its documentation for more
+details. If `mh-compose-letter-function' is defined, it is called on the
+draft and passed three arguments: to, subject, and cc.
+Do not call this function from outside mh-e; use \\[mh-smail] instead."
+ (interactive (list
+ (mh-read-address "To: ")
+ (mh-read-address "Cc: ")
+ (read-string "Subject: ")))
+ (let ((config (current-window-configuration)))
+ (delete-other-windows)
+ (mh-send-sub to cc subject config)))
+
+
+(defun mh-send-other-window (to cc subject)
+ "Compose and send a letter in another window.
+Do not call this function from outside mh-e;
+use \\[mh-smail-other-window] instead.
+See also documentation for `\\[mh-send]' function."
+ (interactive (list
+ (mh-read-address "To: ")
+ (mh-read-address "Cc: ")
+ (read-string "Subject: ")))
+ (let ((pop-up-windows t))
+ (mh-send-sub to cc subject (current-window-configuration))))
+
+
+(defun mh-send-sub (to cc subject config)
+ "Do the real work of composing and sending a letter.
+Expects the TO, CC, and SUBJECT fields as arguments.
+CONFIG is the window configuration before sending mail."
+ (let ((folder mh-current-folder)
+ (msg-num (mh-get-msg-num nil)))
+ (message "Composing a message...")
+ (let ((draft (mh-read-draft
+ "message"
+ (let (components)
+ (cond
+ ((file-exists-p
+ (setq components
+ (expand-file-name mh-comp-formfile mh-user-path)))
+ components)
+ ((file-exists-p
+ (setq components
+ (expand-file-name mh-comp-formfile mh-lib)))
+ components)
+ (t
+ (error (format "Can't find components file \"%s\""
+ components)))))
+ nil)))
+ (mh-insert-fields "To:" to "Subject:" subject "Cc:" cc)
+ (goto-char (point-max))
+ (message "Composing a message...done")
+ (mh-compose-and-send-mail draft "" folder msg-num
+ to subject cc
+ nil nil config))))
+
+
+(defun mh-read-draft (use initial-contents delete-contents-file)
+ ;; Read draft file into a draft buffer and make that buffer the current one.
+ ;; USE is a message used for prompting about the intended use of the message.
+ ;; INITIAL-CONTENTS is filename that is read into an empty buffer, or NIL
+ ;; if buffer should not be modified. Delete the initial-contents file if
+ ;; DELETE-CONTENTS-FILE flag is set.
+ ;; Returns the draft folder's name.
+ ;; If the draft folder facility is enabled in ~/.mh_profile, a new buffer is
+ ;; used each time and saved in the draft folder. The draft file can then be
+ ;; reused.
+ (cond (mh-draft-folder
+ (let ((orig-default-dir default-directory)
+ (draft-file-name (mh-new-draft-name)))
+ (pop-to-buffer (generate-new-buffer
+ (format "draft-%s"
+ (file-name-nondirectory draft-file-name))))
+ (condition-case ()
+ (insert-file-contents draft-file-name t)
+ (file-error))
+ (setq default-directory orig-default-dir)))
+ (t
+ (let ((draft-name (expand-file-name "draft" mh-user-path)))
+ (pop-to-buffer "draft") ; Create if necessary
+ (if (buffer-modified-p)
+ (if (y-or-n-p "Draft has been modified; kill anyway? ")
+ (set-buffer-modified-p nil)
+ (error "Draft preserved")))
+ (setq buffer-file-name draft-name)
+ (clear-visited-file-modtime)
+ (unlock-buffer)
+ (cond ((and (file-exists-p draft-name)
+ (not (equal draft-name initial-contents)))
+ (insert-file-contents draft-name)
+ (delete-file draft-name))))))
+ (cond ((and initial-contents
+ (or (zerop (buffer-size))
+ (not (y-or-n-p
+ (format "A draft exists. Use for %s? " use)))))
+ (erase-buffer)
+ (insert-file-contents initial-contents)
+ (if delete-contents-file (delete-file initial-contents))))
+ (auto-save-mode 1)
+ (if mh-draft-folder
+ (save-buffer)) ; Do not reuse draft name
+ (buffer-name))
+
+
+(defun mh-new-draft-name ()
+ ;; Returns the pathname of folder for draft messages.
+ (save-excursion
+ (mh-exec-cmd-quiet t "mhpath" mh-draft-folder "new")
+ (buffer-substring (point-min) (1- (point-max)))))
+
+
+(defun mh-annotate-msg (msg buffer note &rest args)
+ ;; Mark the MESSAGE in BUFFER listing with the character NOTE and annotate
+ ;; the saved message with ARGS.
+ (apply 'mh-exec-cmd "anno" buffer msg args)
+ (save-excursion
+ (cond ((get-buffer buffer) ; Buffer may be deleted
+ (set-buffer buffer)
+ (if (symbolp msg)
+ (mh-notate-seq msg note (1+ mh-cmd-note))
+ (mh-notate msg note (1+ mh-cmd-note)))))))
+
+
+(defun mh-insert-fields (&rest name-values)
+ ;; Insert the NAME-VALUE pairs in the current buffer.
+ ;; If field NAME exists, append VALUE to it.
+ ;; Do not insert any pairs whose value is the empty string.
+ (let ((case-fold-search t))
+ (while name-values
+ (let ((field-name (car name-values))
+ (value (car (cdr name-values))))
+ (cond ((equal value "")
+ nil)
+ ((mh-position-on-field field-name)
+ (insert " " value))
+ (t
+ (insert field-name " " value "\n")))
+ (setq name-values (cdr (cdr name-values)))))))
+
+
+(defun mh-position-on-field (field &optional ignore)
+ ;; Move to the end of the FIELD in the header.
+ ;; Move to end of entire header if FIELD not found.
+ ;; Returns non-nil iff FIELD was found.
+ ;; The optional second arg is for pre-version 4 compatibility.
+ (let ((case-fold-search t))
+ (goto-char (point-min))
+ (mh-goto-header-end 0)
+ (if (re-search-backward (format "^%s" field) nil t)
+ (progn
+ (forward-line 1)
+ (while (looking-at "^[ \t]")
+ (forward-line 1))
+ (backward-char 1) ;to end of previous line
+ t)
+ nil)))
+
+
+(defun mh-goto-header-end (arg)
+ ;; Find the end of the message header in the current buffer and position
+ ;; the cursor at the ARG'th newline after the header.
+ (if (re-search-forward "^$\\|^-+$" nil nil)
+ (forward-line arg)))
+
+
+(defun mh-read-address (prompt)
+ ;; Read a To: or Cc: address, prompting in the minibuffer with PROMPT.
+ ;; May someday do completion on aliases.
+ (read-string prompt))
+
+
+
+;;; Mode for composing and sending a draft message.
+
+(defvar mh-sent-from-folder nil
+ "Folder of msg associated with this letter.")
+
+(defvar mh-sent-from-msg nil
+ "Number of msg associated with this letter.")
+
+(defvar mh-send-args nil
+ "Extra arguments to pass to \"send\" command.")
+
+(defvar mh-annotate-char nil
+ "Character to use to annotate mh-sent-from-msg.")
+
+(defvar mh-annotate-field nil
+ "Field name for message annotation.")
+
+(put 'mh-letter-mode 'mode-class 'special)
+
+;;;###autoload
+(defun mh-letter-mode ()
+ "Mode for composing letters in mh-e.\\<mh-letter-mode-map>
+When you have finished composing, type \\[mh-send-letter] to send the letter.
+
+\\{mh-letter-mode-map}
+
+Variables controlling this mode (defaults in parentheses):
+
+ mh-delete-yanked-msg-window (nil)
+ If non-nil, \\[mh-yank-cur-msg] will delete any windows displaying
+ the yanked message.
+
+ mh-yank-from-start-of-msg (t)
+ If non-nil, \\[mh-yank-cur-msg] will include the entire message.
+ If `body', just yank the body (no header).
+ If nil, only the portion of the message following the point will be yanked.
+ If there is a region, this variable is ignored.
+
+ mh-signature-file-name (\"~/.signature\")
+ File to be inserted into message by \\[mh-insert-signature].
+
+Upon invoking mh-letter-mode, text-mode-hook and mh-letter-mode-hook are
+invoked with no args, if those values are non-nil."
+
+ (interactive)
+ (or mh-user-path (mh-find-path))
+ (kill-all-local-variables)
+ (make-local-variable 'paragraph-start)
+ (setq paragraph-start (concat "^[ \t]*[-_][-_][-_]+$\\|" paragraph-start))
+ (make-local-variable 'paragraph-separate)
+ (setq paragraph-separate
+ (concat "^[ \t]*[-_][-_][-_]+$\\|" paragraph-separate))
+ (make-local-variable 'mh-send-args)
+ (make-local-variable 'mh-annotate-char)
+ (make-local-variable 'mh-annotate-field)
+ (make-local-variable 'mh-previous-window-config)
+ (make-local-variable 'mh-sent-from-folder)
+ (make-local-variable 'mh-sent-from-msg)
+ (make-local-variable 'mail-header-separator)
+ (setq mail-header-separator "--------") ;for Hyperbole
+ (use-local-map mh-letter-mode-map)
+ (setq major-mode 'mh-letter-mode)
+ (mh-set-mode-name "MH-Letter")
+ (set-syntax-table mh-letter-mode-syntax-table)
+ (run-hooks 'text-mode-hook)
+ ;; if text-mode-hook turned on auto-fill, tune it for messages
+ (cond ((and (boundp 'auto-fill-hook) auto-fill-hook) ;emacs 18
+ (make-local-variable 'auto-fill-hook)
+ (setq auto-fill-hook 'mh-auto-fill-for-letter)))
+ (cond ((and (boundp 'auto-fill-function) auto-fill-function) ;emacs 19
+ (make-local-variable 'auto-fill-function)
+ (setq auto-fill-function 'mh-auto-fill-for-letter)))
+ (run-hooks 'mh-letter-mode-hook))
+
+
+(defun mh-auto-fill-for-letter ()
+ ;; Auto-fill in letters treats the header specially by inserting a tab
+ ;; before continuation line.
+ (do-auto-fill)
+ (if (mh-in-header-p)
+ (save-excursion
+ (beginning-of-line nil)
+ (insert-char ?\t 1))))
+
+
+(defun mh-in-header-p ()
+ ;; Return non-nil if the point is in the header of a draft message.
+ (save-excursion
+ (let ((cur-point (point)))
+ (goto-char (point-min))
+ (re-search-forward "^-*$" nil t)
+ (< cur-point (point)))))
+
+
+(defun mh-to-field ()
+ "Move point to the end of a specified header field.
+The field is indicated by the previous keystroke (the last keystroke
+of the command) according to the list in mh-to-field-choices.
+Create the field if it does not exist. Set the mark to point before moving."
+ (interactive)
+ (expand-abbrev)
+ (let ((target (cdr (assoc (logior last-input-char ?`) mh-to-field-choices)))
+ (case-fold-search t))
+ (push-mark)
+ (cond ((mh-position-on-field target)
+ (let ((eol (point)))
+ (skip-chars-backward " \t")
+ (delete-region (point) eol))
+ (if (and (not (eq (logior last-input-char ?`) ?s))
+ (save-excursion
+ (backward-char 1)
+ (not (looking-at "[:,]"))))
+ (insert ", ")
+ (insert " ")))
+ (t
+ (if (mh-position-on-field "To:")
+ (forward-line 1))
+ (insert (format "%s \n" target))
+ (backward-char 1)))))
+
+
+(defun mh-to-fcc (&optional folder)
+ "Insert an Fcc: FOLDER field in the current message.
+Prompt for the field name with a completion list of the current folders."
+ (interactive)
+ (or folder
+ (setq folder (mh-prompt-for-folder
+ "Fcc"
+ (or (and mh-msg-folder-hook
+ (save-excursion
+ (goto-char (point-min))
+ (funcall mh-msg-folder-hook)))
+ "")
+ t)))
+ (let ((last-input-char ?\C-f))
+ (expand-abbrev)
+ (save-excursion
+ (mh-to-field)
+ (insert (if (mh-folder-name-p folder)
+ (substring folder 1)
+ folder)))))
+
+
+(defun mh-insert-signature ()
+ "Insert the file named by mh-signature-file-name at the current point."
+ (interactive)
+ (insert-file-contents mh-signature-file-name)
+ (set-buffer-modified-p (buffer-modified-p))) ; force mode line update
+
+
+(defun mh-check-whom ()
+ "Verify recipients of the current letter."
+ (interactive)
+ (let ((file-name (buffer-file-name)))
+ (save-buffer)
+ (message "Checking recipients...")
+ (mh-in-show-buffer ("*Recipients*")
+ (bury-buffer (current-buffer))
+ (erase-buffer)
+ (mh-exec-cmd-output "whom" t file-name))
+ (message "Checking recipients...done")))
+
+
+
+;;; Routines to compose and send a letter.
+
+(defun mh-compose-and-send-mail (draft send-args
+ sent-from-folder sent-from-msg
+ to subject cc
+ annotate-char annotate-field
+ config)
+ ;; Edit and compose a draft message in buffer DRAFT and send or save it.
+ ;; SENT-FROM-FOLDER is buffer containing scan listing of current folder, or
+ ;; nil if none exists.
+ ;; SENT-FROM-MSG is the message number or sequence name or nil.
+ ;; SEND-ARGS is an optional argument passed to the send command.
+ ;; The TO, SUBJECT, and CC fields are passed to the
+ ;; mh-compose-letter-function.
+ ;; If ANNOTATE-CHAR is non-null, it is used to notate the scan listing of the
+ ;; message. In that case, the ANNOTATE-FIELD is used to build a string
+ ;; for mh-annotate-msg.
+ ;; CONFIG is the window configuration to restore after sending the letter.
+ (pop-to-buffer draft)
+ (mh-letter-mode)
+ (setq mh-sent-from-folder sent-from-folder)
+ (setq mh-sent-from-msg sent-from-msg)
+ (setq mh-send-args send-args)
+ (setq mh-annotate-char annotate-char)
+ (setq mh-annotate-field annotate-field)
+ (setq mh-previous-window-config config)
+ (setq mode-line-buffer-identification (list "{%b}"))
+ (if (and (boundp 'mh-compose-letter-function)
+ (symbol-value 'mh-compose-letter-function))
+ ;; run-hooks will not pass arguments.
+ (let ((value (symbol-value 'mh-compose-letter-function)))
+ (if (and (listp value) (not (eq (car value) 'lambda)))
+ (while value
+ (funcall (car value) to subject cc)
+ (setq value (cdr value)))
+ (funcall mh-compose-letter-function to subject cc)))))
+
+
+(defun mh-send-letter (&optional arg)
+ "Send the draft letter in the current buffer.
+If optional prefix argument is provided, monitor delivery.
+Run mh-before-send-letter-hook before doing anything."
+ (interactive "P")
+ (run-hooks 'mh-before-send-letter-hook)
+ (set-buffer-modified-p t) ; Make sure buffer is written
+ (save-buffer)
+ (message "Sending...")
+ (let ((draft-buffer (current-buffer))
+ (file-name (buffer-file-name))
+ (config mh-previous-window-config))
+ (cond (arg
+ (pop-to-buffer "MH mail delivery")
+ (erase-buffer)
+ (mh-exec-cmd-output mh-send-prog t "-watch" "-nopush"
+ "-nodraftfolder" mh-send-args file-name)
+ (goto-char (point-max)) ; show the interesting part
+ (recenter -1)
+ (set-buffer draft-buffer)) ; for annotation below
+ (t
+ (mh-exec-cmd-daemon mh-send-prog "-nodraftfolder" "-noverbose"
+ mh-send-args file-name)))
+ (if mh-annotate-char
+ (mh-annotate-msg mh-sent-from-msg
+ mh-sent-from-folder
+ mh-annotate-char
+ "-component" mh-annotate-field
+ "-text" (format "\"%s %s\""
+ (mh-get-field "To:")
+ (mh-get-field "Cc:"))))
+
+ (cond ((or (not arg)
+ (y-or-n-p "Kill draft buffer? "))
+ (kill-buffer draft-buffer)
+ (if config
+ (set-window-configuration config))))
+ (if arg
+ (message "Sending...done")
+ (message "Sending...backgrounded"))))
+
+
+(defun mh-insert-letter (msg folder verbatum)
+ "Insert a MESSAGE from any FOLDER into the current letter.
+Removes the message's headers using mh-invisible-headers.
+Prefixes each non-blank line with mh-ins-buf-prefix (default \"> \").
+If prefix argument VERBATUM provided, do not indent and do not delete
+headers. Leaves the mark before the letter and point after it."
+ (interactive
+ (list (read-input (format "Message number%s: "
+ (if mh-sent-from-msg
+ (format " [%d]" mh-sent-from-msg)
+ "")))
+ (mh-prompt-for-folder "Message from" mh-sent-from-folder nil)
+ current-prefix-arg))
+ (save-restriction
+ (narrow-to-region (point) (point))
+ (let ((start (point-min)))
+ (if (equal msg "") (setq msg (int-to-string mh-sent-from-msg)))
+ (mh-exec-lib-cmd-output "mhl" "-nobell" "-noclear"
+ (expand-file-name msg
+ (mh-expand-file-name folder)))
+ (cond ((not verbatum)
+ (mh-clean-msg-header start mh-invisible-headers mh-visible-headers)
+ (set-mark start) ; since mh-clean-msg-header moves it
+ (mh-insert-prefix-string mh-ins-buf-prefix))))))
+
+
+(defun mh-yank-cur-msg ()
+ "Insert the current message into the draft buffer.
+Prefix each non-blank line in the message with the string in
+`mh-ins-buf-prefix'. If a region is set in the message's buffer, then
+only the region will be inserted. Otherwise, the entire message will
+be inserted if `mh-yank-from-start-of-msg' is non-nil. If this variable
+is nil, the portion of the message following the point will be yanked.
+If `mh-delete-yanked-msg-window' is non-nil, any window displaying the
+yanked message will be deleted."
+ (interactive)
+ (if (and mh-sent-from-folder mh-sent-from-msg)
+ (let ((to-point (point))
+ (to-buffer (current-buffer)))
+ (set-buffer mh-sent-from-folder)
+ (if mh-delete-yanked-msg-window
+ (delete-windows-on mh-show-buffer))
+ (set-buffer mh-show-buffer) ; Find displayed message
+ (let ((mh-ins-str (cond ((if (boundp 'mark-active)
+ mark-active ;Emacs 19
+ (mark)) ;Emacs 18
+ (buffer-substring (region-beginning)
+ (region-end)))
+ ((eq 'body mh-yank-from-start-of-msg)
+ (buffer-substring
+ (save-excursion
+ (goto-char (point-min))
+ (mh-goto-header-end 1)
+ (point))
+ (point-max)))
+ (mh-yank-from-start-of-msg
+ (buffer-substring (point-min) (point-max)))
+ (t
+ (buffer-substring (point) (point-max))))))
+ (set-buffer to-buffer)
+ (narrow-to-region to-point to-point)
+ (push-mark)
+ (insert mh-ins-str)
+ (mh-insert-prefix-string mh-ins-buf-prefix)
+ (insert "\n")
+ (widen)))
+ (error "There is no current message")))
+
+
+(defun mh-insert-prefix-string (mh-ins-string)
+ ;; Run MAIL-CITATION-HOOK to insert a prefix string before each line
+ ;; in the buffer. Generality for supercite users.
+ (save-excursion
+ (set-mark (point-max))
+ (goto-char (point-min))
+ (cond (mail-citation-hook
+ (run-hooks 'mail-citation-hook))
+ (mh-yank-hooks ;old hook name
+ (run-hooks 'mh-yank-hooks))
+ (t
+ (or (bolp) (forward-line 1))
+ (while (< (point) (mark))
+ (insert mh-ins-string)
+ (forward-line 1))))))
+
+
+(defun mh-fully-kill-draft ()
+ "Kill the draft message file and the draft message buffer.
+Use \\[kill-buffer] if you don't want to delete the draft message file."
+ (interactive)
+ (if (y-or-n-p "Kill draft message? ")
+ (let ((config mh-previous-window-config))
+ (if (file-exists-p (buffer-file-name))
+ (delete-file (buffer-file-name)))
+ (set-buffer-modified-p nil)
+ (kill-buffer (buffer-name))
+ (message "")
+ (if config
+ (set-window-configuration config)))
+ (error "Message not killed")))
+
+;;; Build the letter-mode keymap:
+
+(define-key mh-letter-mode-map "\C-c\C-f\C-b" 'mh-to-field)
+(define-key mh-letter-mode-map "\C-c\C-f\C-c" 'mh-to-field)
+(define-key mh-letter-mode-map "\C-c\C-f\C-f" 'mh-to-fcc)
+(define-key mh-letter-mode-map "\C-c\C-f\C-s" 'mh-to-field)
+(define-key mh-letter-mode-map "\C-c\C-f\C-t" 'mh-to-field)
+(define-key mh-letter-mode-map "\C-c\C-fb" 'mh-to-field)
+(define-key mh-letter-mode-map "\C-c\C-fc" 'mh-to-field)
+(define-key mh-letter-mode-map "\C-c\C-ff" 'mh-to-fcc)
+(define-key mh-letter-mode-map "\C-c\C-fs" 'mh-to-field)
+(define-key mh-letter-mode-map "\C-c\C-ft" 'mh-to-field)
+(define-key mh-letter-mode-map "\C-c\C-q" 'mh-fully-kill-draft)
+(define-key mh-letter-mode-map "\C-c\C-w" 'mh-check-whom)
+(define-key mh-letter-mode-map "\C-c\C-i" 'mh-insert-letter)
+(define-key mh-letter-mode-map "\C-c\C-y" 'mh-yank-cur-msg)
+(define-key mh-letter-mode-map "\C-c\C-s" 'mh-insert-signature)
+(define-key mh-letter-mode-map "\C-c\C-c" 'mh-send-letter)
+(define-key mh-letter-mode-map "\C-c\C-m\C-f" 'mh-mhn-compose-forw)
+(define-key mh-letter-mode-map "\C-c\C-m\C-e" 'mh-mhn-compose-anon-ftp)
+(define-key mh-letter-mode-map "\C-c\C-m\C-t" 'mh-mhn-compose-external-compressed-tar)
+(define-key mh-letter-mode-map "\C-c\C-m\C-i" 'mh-mhn-compose-insertion)
+(define-key mh-letter-mode-map "\C-c\C-e" 'mh-edit-mhn)
+(define-key mh-letter-mode-map "\C-c\C-m\C-u" 'mh-revert-mhn-edit)
+
+
+;;; autoloads from mh-mime
+
+(autoload 'mh-mhn-compose-insertion "mh-mime"
+ "Add a directive to insert a message part from a file." t)
+(autoload 'mh-mhn-compose-anon-ftp "mh-mime"
+ "Add a directive for an anonymous ftp external body part." t)
+(autoload 'mh-mhn-compose-external-compressed-tar "mh-mime"
+ "Add a directive to include a reference to a compressed tar file." t)
+(autoload 'mh-mhn-compose-forw "mh-mime"
+ "Add a forw directive to this message." t)
+(autoload 'mh-edit-mhn "mh-mime"
+ "Filter the current draft through the mhn program for MIME formatting.
+Using directives already inserted in the draft, fills in
+all the MIME components and header fields.
+This step should be done last just before sending the message.
+The mhn program is part of MH version 6.8 or later.
+The `\\[mh-revert-mhn-edit]' command undoes this command.
+For assistance with creating MIME directives to insert
+various types of components in a message, see
+\\[mh-mhn-compose-insertion] (generic insertion from a file),
+\\[mh-mhn-compose-anon-ftp] (external reference to file via anonymous ftp),
+\\[mh-mhn-compose-external-compressed-tar] \
+\(reference to compressed tar file via anonymous ftp), and
+\\[mh-mhn-compose-forw] (forward message)." t)
+
+(autoload 'mh-revert-mhn-edit "mh-mime"
+ "Undoes the effect of \\[mh-edit-mhn] by reverting to the backup file." t)