--- /dev/null
+;;; mailclient.el --- mail sending via system's mail client. -*- byte-compile-dynamic: t -*-
+
+;; Copyright (C) 2005 Free Software Foundation
+
+;; Author: David Reitter <david.reitter@gmail.com>
+;; Keywords: mail
+
+;; 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, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+
+;;; Commentary:
+
+;; This package allows to hand over a buffer to be sent off
+;; via the system's designated e-mail client.
+;; Note that the e-mail client will display the contents of the buffer
+;; again for editing.
+;; The e-mail client is taken to be whoever handles a mailto: URL
+;; via `browse-url'.
+;; Mailto: URLs are composed according to RFC2368.
+
+;; MIME bodies are not supported - we rather expect the mail client
+;; to encode the body and add, for example, a digital signature.
+;; The mailto URL RFC calls for "short text messages that are
+;; actually the content of automatic processing."
+;; So mailclient.el is ideal for situations where an e-mail is
+;; generated automatically, and the user can edit it in the
+;; mail client (e.g. bug-reports).
+
+;; To activate:
+;; (setq send-mail-function 'mailclient-send-it) ; if you use `mail'
+
+;;; Code:
+
+
+(require 'sendmail) ;; for mail-sendmail-undelimit-header
+(require 'mail-utils) ;; for mail-fetch-field
+
+(defcustom mailclient-place-body-on-clipboard-flag
+ (fboundp 'w32-set-clipboard-data)
+ "If non-nil, put the e-mail body on the clipboard in mailclient.
+This is useful on systems where only short mailto:// URLs are
+supported. Defaults to non-nil on Windows, nil otherwise."
+ :type 'boolean
+ :group 'mail)
+
+(defun mailclient-encode-string-as-url (string)
+ "Convert STRING to a URL, using utf-8 as encoding."
+ (apply (function concat)
+ (mapcar
+ (lambda (char)
+ (cond
+ ((eq char ?\x20) "%20") ;; space
+ ((eq char ?\n) "%0D%0A") ;; newline
+ ((string-match "[-a-zA-Z0-9_:/.@]" (char-to-string char))
+ (char-to-string char)) ;; printable
+ (t ;; everything else
+ (format "%%%02x" char)))) ;; escape
+ ;; Convert string to list of chars
+ (append (encode-coding-string string 'utf-8)))))
+
+(defvar mailclient-delim-static "?")
+(defun mailclient-url-delim ()
+ (let ((current mailclient-delim-static))
+ (setq mailclient-delim-static "&")
+ current))
+
+(defun mailclient-gather-addresses (str &optional drop-first-name)
+ (let ((field (mail-fetch-field str nil t)))
+ (if field
+ (save-excursion
+ (let ((first t)
+ (result ""))
+ (mapc
+ (lambda (recp)
+ (setq result
+ (concat
+ result
+ (if (and drop-first-name
+ first)
+ ""
+ (concat (mailclient-url-delim) str "="))
+ (mailclient-encode-string-as-url
+ recp)))
+ (setq first nil))
+ (split-string
+ (mail-strip-quoted-names field) "\, *"))
+ result)))))
+
+;;;###autoload
+(defun mailclient-send-it ()
+ "Pass current buffer on to the system's mail client.
+Suitable value for `send-mail-function'.
+The mail client is taken to be the handler of mailto URLs."
+ (require 'mail-utils)
+ (let ((case-fold-search nil)
+ delimline
+ (mailbuf (current-buffer)))
+ (unwind-protect
+ (with-temp-buffer
+ (insert-buffer-substring mailbuf)
+ ;; Move to header delimiter
+ (mail-sendmail-undelimit-header)
+ (setq delimline (point-marker))
+ (if mail-aliases
+ (expand-mail-aliases (point-min) delimline))
+ (goto-char (point-min))
+ ;; ignore any blank lines in the header
+ (while (and (re-search-forward "\n\n\n*" delimline t)
+ (< (point) delimline))
+ (replace-match "\n"))
+ (let ((case-fold-search t))
+ ;; initialize limiter
+ (setq mailclient-delim-static "?")
+ ;; construct and call up mailto URL
+ (browse-url
+ (concat
+ (save-excursion
+ (narrow-to-region (point-min) delimline)
+ (concat
+ "mailto:"
+ ;; some of the headers according to RFC822
+ (mailclient-gather-addresses "To"
+ 'drop-first-name)
+ (mailclient-gather-addresses "cc" )
+ (mailclient-gather-addresses "bcc" )
+ (mailclient-gather-addresses "Resent-To" )
+ (mailclient-gather-addresses "Resent-cc" )
+ (mailclient-gather-addresses "Resent-bcc" )
+ (mailclient-gather-addresses "Reply-To" )
+ ;; The From field is not honored for now: it's
+ ;; not necessarily configured. The mail client
+ ;; knows the user's address(es)
+ ;; (mailclient-gather-addresses "From" )
+ ;; subject line
+ (let ((subj (mail-fetch-field "Subject" nil t)))
+ (widen) ;; so we can read the body later on
+ (if subj ;; if non-blank
+ ;; the mail client will deal with
+ ;; warning the user etc.
+ (concat (mailclient-url-delim) "subject="
+ (mailclient-encode-string-as-url subj))
+ ""))))
+ ;; body
+ (concat
+ (mailclient-url-delim) "body="
+ (mailclient-encode-string-as-url
+ (if mailclient-place-body-on-clipboard-flag
+ (progn
+ (clipboard-kill-ring-save
+ (+ 1 delimline) (point-max))
+ (concat
+ "*** E-Mail body has been placed on clipboard, "
+ "please paste them here! ***"))
+ ;; else
+ (buffer-substring (+ 1 delimline) (point-max))))))))))))
+
+(provide 'mailclient)
+
+;;; mailclient.el ends here
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