lisp/gnus/gnus-dired.el

   1 ;;; gnus-dired.el --- utility functions where gnus and dired meet
   2
   3 ;; Copyright (C) 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004
   4 ;;        Free Software Foundation, Inc.
   5
   6 ;; Authors: Benjamin Rutt <brutt@bloomington.in.us>,
   7 ;;          Shenghuo Zhu <zsh@cs.rochester.edu>
   8 ;; Keywords: mail, news, extensions
   9
  10 ;; This file is part of GNU Emacs.
  11
  12 ;; GNU Emacs is free software; you can redistribute it and/or modify
  13 ;; it under the terms of the GNU General Public License as published by
  14 ;; the Free Software Foundation; either version 2, or (at your option)
  15 ;; any later version.
  16
  17 ;; GNU Emacs is distributed in the hope that it will be useful,
  18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ;; GNU General Public License for more details.
  21
  22 ;; You should have received a copy of the GNU General Public License
  23 ;; along with GNU Emacs; see the file COPYING.  If not, write to
  24 ;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  25 ;; Boston, MA 02111-1307, USA.
  26
  27 ;;; Commentary:
  28
  29 ;; This package provides utility functions for intersections of gnus
  30 ;; and dired.  To enable the gnus-dired-mode minor mode which will
  31 ;; have the effect of installing keybindings in dired-mode, place the
  32 ;; following in your ~/.gnus:
  33
  34 ;; (require 'gnus-dired) ;, isn't needed due to autoload cookies
  35 ;; (add-hook 'dired-mode-hook 'turn-on-gnus-dired-mode)
  36
  37 ;; Note that if you visit dired buffers before your ~/.gnus file has
  38 ;; been read, those dired buffers won't have the keybindings in
  39 ;; effect.  To get around that problem, you may want to add the above
  40 ;; statements to your ~/.emacs instead.
  41
  42 ;;; Code:
  43
  44 (require 'dired)
  45 (require 'gnus-ems)
  46 (require 'gnus-msg)
  47 (require 'gnus-util)
  48 (require 'message)
  49 (require 'mm-encode)
  50 (require 'mml)
  51
  52 (defvar gnus-dired-mode nil
  53   "Minor mode for intersections of gnus and dired.")
  54
  55 (defvar gnus-dired-mode-map nil)
  56
  57 (unless gnus-dired-mode-map
  58   (setq gnus-dired-mode-map (make-sparse-keymap))
  59
  60   (gnus-define-keys gnus-dired-mode-map
  61     "\C-c\C-m\C-a" gnus-dired-attach
  62     "\C-c\C-m\C-l" gnus-dired-find-file-mailcap
  63     "\C-c\C-m\C-p" gnus-dired-print))
  64
  65 (defun gnus-dired-mode (&optional arg)
  66   "Minor mode for intersections of gnus and dired.
  67
  68 \\{gnus-dired-mode-map}"
  69   (interactive "P")
  70   (when (eq major-mode 'dired-mode)
  71     (set (make-local-variable 'gnus-dired-mode)
  72          (if (null arg) (not gnus-dired-mode)
  73            (> (prefix-numeric-value arg) 0)))
  74     (when gnus-dired-mode
  75       (gnus-add-minor-mode 'gnus-dired-mode "" gnus-dired-mode-map)
  76       (gnus-run-hooks 'gnus-dired-mode-hook))))
  77
  78 ;;;###autoload
  79 (defun turn-on-gnus-dired-mode ()
  80   "Convenience method to turn on gnus-dired-mode."
  81   (gnus-dired-mode 1))
  82
  83 ;; Method to attach files to a gnus composition.
  84 (defun gnus-dired-attach (files-to-attach)
  85   "Attach dired's marked files to a gnus message composition.
  86 If called non-interactively, FILES-TO-ATTACH should be a list of
  87 filenames."
  88   (interactive
  89    (list
  90     (delq nil
  91           (mapcar
  92            ;; don't attach directories
  93            (lambda (f) (if (file-directory-p f) nil f))
  94            (nreverse (dired-map-over-marks (dired-get-filename) nil))))))
  95   (let ((destination nil)
  96         (files-str nil)
  97         (bufs nil))
  98     ;; warn if user tries to attach without any files marked
  99     (if (null files-to-attach)
 100         (error "No files to attach")
 101       (setq files-str
 102             (mapconcat
 103              (lambda (f) (file-name-nondirectory f))
 104              files-to-attach ", "))
 105       (setq bufs (message-buffers))
 106
 107       ;; set up destination message buffer
 108       (if (and bufs
 109                (y-or-n-p "Attach files to existing message buffer? "))
 110           (setq destination
 111                 (if (= (length bufs) 1)
 112                     (get-buffer (car bufs))
 113                   (completing-read "Attach to which message buffer: "
 114                                    (mapcar
 115                                     (lambda (b)
 116                                       (cons b (get-buffer b)))
 117                                     bufs)
 118                                    nil t)))
 119         ;; setup a new gnus message buffer
 120         (gnus-setup-message 'message (message-mail))
 121         (setq destination (current-buffer)))
 122
 123       ;; set buffer to destination buffer, and attach files
 124       (set-buffer destination)
 125       (goto-char (point-max))           ;attach at end of buffer
 126       (while files-to-attach
 127         (mml-attach-file (car files-to-attach)
 128                          (or (mm-default-file-encoding (car files-to-attach))
 129                              "application/octet-stream") nil)
 130         (setq files-to-attach (cdr files-to-attach)))
 131       (message "Attached file(s) %s" files-str))))
 132
 133 (autoload 'mailcap-parse-mailcaps "mailcap" "" t)
 134
 135 (defun gnus-dired-find-file-mailcap (&optional file-name arg)
 136   "In dired, visit FILE-NAME according to the mailcap file.
 137 If ARG is non-nil, open it in a new buffer."
 138   (interactive (list
 139                 (file-name-sans-versions (dired-get-filename) t)
 140                 current-prefix-arg))
 141   (mailcap-parse-mailcaps)
 142   (if (file-exists-p file-name)
 143       (let (mime-type method)
 144         (if (and (not arg)
 145                  (not (file-directory-p file-name))
 146                  (string-match "\\.[^\\.]+$" file-name)
 147                  (setq mime-type
 148                        (mailcap-extension-to-mime
 149                         (match-string 0 file-name)))
 150                  (stringp
 151                   (setq method
 152                         (cdr (assoc 'viewer
 153                                     (car (mailcap-mime-info mime-type
 154                                                             'all)))))))
 155             (let ((view-command (mm-mailcap-command method file-name nil)))
 156               (message "viewing via %s" view-command)
 157               (start-process "*display*"
 158                              nil
 159                              shell-file-name
 160                              shell-command-switch
 161                              view-command))
 162           (find-file file-name)))
 163     (if (file-symlink-p file-name)
 164         (error "File is a symlink to a nonexistent target")
 165       (error "File no longer exists; type `g' to update Dired buffer"))))
 166
 167 (defun gnus-dired-print (&optional file-name print-to)
 168   "In dired, print FILE-NAME according to the mailcap file.
 169
 170 If there is no print command, print in a PostScript image. If the
 171 optional argument PRINT-TO is nil, send the image to the printer. If
 172 PRINT-TO is a string, save the PostScript image in a file with that
 173 name.  If PRINT-TO is a number, prompt the user for the name of the
 174 file to save in."
 175   (interactive (list
 176                 (file-name-sans-versions (dired-get-filename) t)
 177                 (ps-print-preprint current-prefix-arg)))
 178   (mailcap-parse-mailcaps)
 179   (cond
 180    ((file-directory-p file-name)
 181     (error "Can't print a directory"))
 182    ((file-exists-p file-name)
 183     (let (mime-type method)
 184       (if (and (string-match "\\.[^\\.]+$" file-name)
 185                (setq mime-type
 186                      (mailcap-extension-to-mime
 187                       (match-string 0 file-name)))
 188                (stringp
 189                 (setq method (mailcap-mime-info mime-type "print"))))
 190           (call-process shell-file-name nil
 191                         (generate-new-buffer " *mm*")
 192                         nil
 193                         shell-command-switch
 194                         (mm-mailcap-command method file-name mime-type))
 195         (with-temp-buffer
 196           (insert-file-contents file-name)
 197           (gnus-print-buffer))
 198         (ps-despool print-to))))
 199    ((file-symlink-p file-name)
 200      (error "File is a symlink to a nonexistent target"))
 201     (t
 202      (error "File no longer exists; type `g' to update Dired buffer"))))
 203
 204 (provide 'gnus-dired)
 205
 206 ;;; arch-tag: 44737731-e445-4638-a31e-713c7590ec76
 207 ;;; gnus-dired.el ends here