1;;; gnus-dired.el --- utility functions where gnus and dired meet
2
3;; Copyright (C) 1996, 1997, 1998, 1999, 2001, 2002, 2003, 2004,
4;;   2005, 2006, 2007 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., 51 Franklin Street, Fifth Floor,
25;; Boston, MA 02110-1301, 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.
86If called non-interactively, FILES-TO-ATTACH should be a list of
87filenames."
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.
137If 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 "\\.[^\\.]+$" file-name)
147		 (setq mime-type
148		       (mailcap-extension-to-mime
149			(match-string 0 file-name)))
150		 (stringp
151		  (setq method
152			(cdr (assoc 'viewer
153				    (car (mailcap-mime-info mime-type
154							    'all)))))))
155	    (let ((view-command (mm-mailcap-command method file-name nil)))
156	      (message "viewing via %s" view-command)
157	      (start-process "*display*"
158			     nil
159			     shell-file-name
160			     shell-command-switch
161			     view-command))
162	  (find-file file-name)))
163    (if (file-symlink-p file-name)
164	(error "File is a symlink to a nonexistent target")
165      (error "File no longer exists; type `g' to update Dired buffer"))))
166
167(defun gnus-dired-print (&optional file-name print-to)
168  "In dired, print FILE-NAME according to the mailcap file.
169
170If there is no print command, print in a PostScript image. If the
171optional argument PRINT-TO is nil, send the image to the printer. If
172PRINT-TO is a string, save the PostScript image in a file with that
173name.  If PRINT-TO is a number, prompt the user for the name of the
174file to save in."
175  (interactive (list
176		(file-name-sans-versions (dired-get-filename) t)
177		(ps-print-preprint current-prefix-arg)))
178  (mailcap-parse-mailcaps)
179  (cond
180   ((file-directory-p file-name)
181    (error "Can't print a directory"))
182   ((file-exists-p file-name)
183    (let (mime-type method)
184      (if (and (string-match "\\.[^\\.]+$" 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
208