| 1 | ;;; mailclient.el --- mail sending via system's mail client. -*- byte-compile-dynamic: t -*- |
| 2 | |
| 3 | ;; Copyright (C) 2005, 2006, 2007, 2008, 2009 Free Software Foundation |
| 4 | |
| 5 | ;; Author: David Reitter <david.reitter@gmail.com> |
| 6 | ;; Keywords: mail |
| 7 | |
| 8 | ;; This file is part of GNU Emacs. |
| 9 | |
| 10 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
| 11 | ;; it under the terms of the GNU General Public License as published by |
| 12 | ;; the Free Software Foundation, either version 3 of the License, or |
| 13 | ;; (at your option) any later version. |
| 14 | |
| 15 | ;; GNU Emacs is distributed in the hope that it will be useful, |
| 16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | ;; GNU General Public License for more details. |
| 19 | |
| 20 | ;; You should have received a copy of the GNU General Public License |
| 21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
| 22 | |
| 23 | ;;; Commentary: |
| 24 | |
| 25 | ;; This package allows to hand over a buffer to be sent off |
| 26 | ;; via the system's designated e-mail client. |
| 27 | ;; Note that the e-mail client will display the contents of the buffer |
| 28 | ;; again for editing. |
| 29 | ;; The e-mail client is taken to be whoever handles a mailto: URL |
| 30 | ;; via `browse-url'. |
| 31 | ;; Mailto: URLs are composed according to RFC2368. |
| 32 | |
| 33 | ;; MIME bodies are not supported - we rather expect the mail client |
| 34 | ;; to encode the body and add, for example, a digital signature. |
| 35 | ;; The mailto URL RFC calls for "short text messages that are |
| 36 | ;; actually the content of automatic processing." |
| 37 | ;; So mailclient.el is ideal for situations where an e-mail is |
| 38 | ;; generated automatically, and the user can edit it in the |
| 39 | ;; mail client (e.g. bug-reports). |
| 40 | |
| 41 | ;; To activate: |
| 42 | ;; (setq send-mail-function 'mailclient-send-it) ; if you use `mail' |
| 43 | |
| 44 | ;;; Code: |
| 45 | |
| 46 | |
| 47 | (require 'sendmail) ;; for mail-sendmail-undelimit-header |
| 48 | (require 'mail-utils) ;; for mail-fetch-field |
| 49 | |
| 50 | (defcustom mailclient-place-body-on-clipboard-flag |
| 51 | (fboundp 'w32-set-clipboard-data) |
| 52 | "If non-nil, put the e-mail body on the clipboard in mailclient. |
| 53 | This is useful on systems where only short mailto:// URLs are |
| 54 | supported. Defaults to non-nil on Windows, nil otherwise." |
| 55 | :type 'boolean |
| 56 | :group 'mail) |
| 57 | |
| 58 | (defun mailclient-encode-string-as-url (string) |
| 59 | "Convert STRING to a URL, using utf-8 as encoding." |
| 60 | (apply (function concat) |
| 61 | (mapcar |
| 62 | (lambda (char) |
| 63 | (cond |
| 64 | ((eq char ?\x20) "%20") ;; space |
| 65 | ((eq char ?\n) "%0D%0A") ;; newline |
| 66 | ((string-match "[-a-zA-Z0-9_:/.@]" (char-to-string char)) |
| 67 | (char-to-string char)) ;; printable |
| 68 | (t ;; everything else |
| 69 | (format "%%%02x" char)))) ;; escape |
| 70 | ;; Convert string to list of chars |
| 71 | (append (encode-coding-string string 'utf-8))))) |
| 72 | |
| 73 | (defvar mailclient-delim-static "?") |
| 74 | (defun mailclient-url-delim () |
| 75 | (let ((current mailclient-delim-static)) |
| 76 | (setq mailclient-delim-static "&") |
| 77 | current)) |
| 78 | |
| 79 | (defun mailclient-gather-addresses (str &optional drop-first-name) |
| 80 | (let ((field (mail-fetch-field str nil t))) |
| 81 | (if field |
| 82 | (save-excursion |
| 83 | (let ((first t) |
| 84 | (result "")) |
| 85 | (mapc |
| 86 | (lambda (recp) |
| 87 | (setq result |
| 88 | (concat |
| 89 | result |
| 90 | (if (and drop-first-name |
| 91 | first) |
| 92 | "" |
| 93 | (concat (mailclient-url-delim) str "=")) |
| 94 | (mailclient-encode-string-as-url |
| 95 | recp))) |
| 96 | (setq first nil)) |
| 97 | (split-string |
| 98 | (mail-strip-quoted-names field) "\, *")) |
| 99 | result))))) |
| 100 | |
| 101 | ;;;###autoload |
| 102 | (defun mailclient-send-it () |
| 103 | "Pass current buffer on to the system's mail client. |
| 104 | Suitable value for `send-mail-function'. |
| 105 | The mail client is taken to be the handler of mailto URLs." |
| 106 | (require 'mail-utils) |
| 107 | (let ((case-fold-search nil) |
| 108 | delimline |
| 109 | (mailbuf (current-buffer))) |
| 110 | (unwind-protect |
| 111 | (with-temp-buffer |
| 112 | (insert-buffer-substring mailbuf) |
| 113 | ;; Move to header delimiter |
| 114 | (mail-sendmail-undelimit-header) |
| 115 | (setq delimline (point-marker)) |
| 116 | (if mail-aliases |
| 117 | (expand-mail-aliases (point-min) delimline)) |
| 118 | (goto-char (point-min)) |
| 119 | ;; ignore any blank lines in the header |
| 120 | (while (and (re-search-forward "\n\n\n*" delimline t) |
| 121 | (< (point) delimline)) |
| 122 | (replace-match "\n")) |
| 123 | (let ((case-fold-search t)) |
| 124 | ;; initialize limiter |
| 125 | (setq mailclient-delim-static "?") |
| 126 | ;; construct and call up mailto URL |
| 127 | (browse-url |
| 128 | (concat |
| 129 | (save-excursion |
| 130 | (narrow-to-region (point-min) delimline) |
| 131 | (concat |
| 132 | "mailto:" |
| 133 | ;; some of the headers according to RFC822 |
| 134 | (mailclient-gather-addresses "To" |
| 135 | 'drop-first-name) |
| 136 | (mailclient-gather-addresses "cc" ) |
| 137 | (mailclient-gather-addresses "bcc" ) |
| 138 | (mailclient-gather-addresses "Resent-To" ) |
| 139 | (mailclient-gather-addresses "Resent-cc" ) |
| 140 | (mailclient-gather-addresses "Resent-bcc" ) |
| 141 | (mailclient-gather-addresses "Reply-To" ) |
| 142 | ;; The From field is not honored for now: it's |
| 143 | ;; not necessarily configured. The mail client |
| 144 | ;; knows the user's address(es) |
| 145 | ;; (mailclient-gather-addresses "From" ) |
| 146 | ;; subject line |
| 147 | (let ((subj (mail-fetch-field "Subject" nil t))) |
| 148 | (widen) ;; so we can read the body later on |
| 149 | (if subj ;; if non-blank |
| 150 | ;; the mail client will deal with |
| 151 | ;; warning the user etc. |
| 152 | (concat (mailclient-url-delim) "subject=" |
| 153 | (mailclient-encode-string-as-url subj)) |
| 154 | "")))) |
| 155 | ;; body |
| 156 | (concat |
| 157 | (mailclient-url-delim) "body=" |
| 158 | (mailclient-encode-string-as-url |
| 159 | (if mailclient-place-body-on-clipboard-flag |
| 160 | (progn |
| 161 | (clipboard-kill-ring-save |
| 162 | (+ 1 delimline) (point-max)) |
| 163 | (concat |
| 164 | "*** E-Mail body has been placed on clipboard, " |
| 165 | "please paste them here! ***")) |
| 166 | ;; else |
| 167 | (buffer-substring (+ 1 delimline) (point-max)))))))))))) |
| 168 | |
| 169 | (provide 'mailclient) |
| 170 | |
| 171 | ;; arch-tag: 35d10fc8-a1bc-4f29-a4e6-c288e53578ef |
| 172 | ;;; mailclient.el ends here |