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;;; gnus-dired.el --- utility functions where gnus and dired meet -*- lexical-binding: t; -*-
;; Copyright (C) 1996-1999, 2001-2021 Free Software Foundation, Inc.
;; Authors: Benjamin Rutt <brutt@bloomington.in.us>,
;; Shenghuo Zhu <zsh@cs.rochester.edu>
;; Keywords: mail, news, extensions
;; 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 3 of the License, 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. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; This package provides utility functions for intersections of gnus
;; and dired. To enable the gnus-dired-mode minor mode which will
;; have the effect of installing keybindings in dired-mode, place the
;; following in your ~/.gnus:
;; (require 'gnus-dired) ;, isn't needed due to autoload cookies
;; (add-hook 'dired-mode-hook #'turn-on-gnus-dired-mode)
;; Note that if you visit dired buffers before your ~/.gnus file has
;; been read, those dired buffers won't have the keybindings in
;; effect. To get around that problem, you may want to add the above
;; statements to your ~/.emacs instead.
;;; Code:
(require 'dired)
(autoload 'mml-attach-file "mml")
(autoload 'mailcap-extension-to-mime "mailcap")
(autoload 'mailcap-mime-info "mailcap")
;; Maybe shift this function to `mailcap.el'?
(autoload 'mm-mailcap-command "mm-decode")
(autoload 'ps-print-preprint "ps-print")
;; Autoloads to avoid byte-compiler warnings. These are used only if the user
;; customizes `gnus-dired-mail-mode' to use Message and/or Gnus.
(autoload 'message-buffers "message")
(autoload 'gnus-print-buffer "gnus-sum")
(defvar gnus-dired-mode-map
(let ((map (make-sparse-keymap)))
(define-key map "\C-c\C-m\C-a" 'gnus-dired-attach)
(define-key map "\C-c\C-m\C-l" 'gnus-dired-find-file-mailcap)
(define-key map "\C-c\C-m\C-p" 'gnus-dired-print)
map))
;; FIXME: Make it customizable, change the default to `mail-user-agent' when
;; this file is renamed (e.g. to `dired-mime.el').
(defcustom gnus-dired-mail-mode 'gnus-user-agent ;; mail-user-agent
"Your preference for a mail composition package.
See `mail-user-agent' for more information."
:group 'mail ;; dired?
:version "23.1" ;; No Gnus
:type '(radio (function-item :tag "Default Emacs mail"
:format "%t\n"
sendmail-user-agent)
(function-item :tag "Emacs interface to MH"
:format "%t\n"
mh-e-user-agent)
(function-item :tag "Gnus Message package"
:format "%t\n"
message-user-agent)
(function-item :tag "Gnus Message with full Gnus features"
:format "%t\n"
gnus-user-agent)
(function :tag "Other")))
(define-minor-mode gnus-dired-mode
"Minor mode for intersections of gnus and dired.
\\{gnus-dired-mode-map}"
:keymap gnus-dired-mode-map
(unless (derived-mode-p 'dired-mode)
(setq gnus-dired-mode nil)))
;;;###autoload
(defun turn-on-gnus-dired-mode ()
"Convenience method to turn on gnus-dired-mode."
(interactive)
(gnus-dired-mode 1))
(defun gnus-dired-mail-buffers ()
"Return a list of active mail composition buffers."
(if (and (memq gnus-dired-mail-mode '(message-user-agent gnus-user-agent))
(require 'message)
(fboundp 'message-buffers))
(message-buffers)
;; Cf. `message-buffers' in `message.el':
(let (buffers)
(save-excursion
(dolist (buffer (buffer-list t))
(set-buffer buffer)
(when (eq major-mode 'mail-mode)
(push (buffer-name buffer) buffers))))
(nreverse buffers))))
(autoload 'gnus-completing-read "gnus-util")
;; Method to attach files to a mail composition.
(defun gnus-dired-attach (files-to-attach)
"Attach dired's marked files to a gnus message composition.
If called non-interactively, FILES-TO-ATTACH should be a list of
filenames."
(interactive
(list
(delq nil
(mapcar
;; don't attach directories
(lambda (f) (if (file-directory-p f) nil f))
(nreverse (dired-map-over-marks (dired-get-filename) nil)))))
dired-mode)
(let ((destination nil)
(files-str nil)
(bufs nil))
;; warn if user tries to attach without any files marked
(if (null files-to-attach)
(error "No files to attach")
(setq files-str
(mapconcat
(lambda (f) (file-name-nondirectory f))
files-to-attach ", "))
(setq bufs (gnus-dired-mail-buffers))
;; set up destination mail composition buffer
(if (and bufs
(y-or-n-p "Attach files to existing mail composition buffer? "))
(setq destination
(if (= (length bufs) 1)
(get-buffer (car bufs))
(gnus-completing-read "Attach to buffer"
bufs t nil nil (car bufs))))
;; setup a new mail composition buffer
(let ((mail-user-agent gnus-dired-mail-mode)
;; A workaround to prevent Gnus from displaying the Gnus
;; logo when invoking this command without loading Gnus.
;; Gnus demonstrates it when gnus.elc is being loaded if
;; a command of which the name is prefixed with "gnus"
;; causes that autoloading. See the code in question,
;; that is the one first found in gnus.el by performing
;; `C-s this-command'.
(this-command (if (eq gnus-dired-mail-mode 'gnus-user-agent)
'gnoose-dired-attach
this-command)))
(compose-mail))
(setq destination (current-buffer)))
;; set buffer to destination buffer, and attach files
(set-buffer destination)
(goto-char (point-max)) ;attach at end of buffer
(while files-to-attach
(mml-attach-file (car files-to-attach)
(or (mm-default-file-type (car files-to-attach))
"application/octet-stream")
nil)
(setq files-to-attach (cdr files-to-attach)))
(message "Attached file(s) %s" files-str))))
(autoload 'mailcap-parse-mailcaps "mailcap" "" t)
(defun gnus-dired-find-file-mailcap (&optional file-name arg)
"In dired, visit FILE-NAME according to the mailcap file.
If ARG is non-nil, open it in a new buffer."
(interactive (list
(file-name-sans-versions (dired-get-filename) t)
current-prefix-arg)
dired-mode)
(mailcap-parse-mailcaps)
(if (file-exists-p file-name)
(let (mime-type method)
(if (and (not arg)
(not (file-directory-p file-name))
(string-match "\\.[^\\.]+$" file-name)
(setq mime-type
(mailcap-extension-to-mime
(match-string 0 file-name)))
(stringp
(setq method
(cdr (assoc 'viewer
(car (mailcap-mime-info mime-type
'all
'no-decode)))))))
(let ((view-command (mm-mailcap-command method file-name nil)))
(message "viewing via %s" view-command)
(start-process "*display*"
nil
shell-file-name
shell-command-switch
view-command))
(find-file file-name)))
(if (file-symlink-p file-name)
(error "File is a symlink to a nonexistent target")
(error "File no longer exists; type `g' to update Dired buffer"))))
(defun gnus-dired-print (&optional file-name print-to)
"In dired, print FILE-NAME according to the mailcap file.
If there is no print command, print in a PostScript image. If the
optional argument PRINT-TO is nil, send the image to the printer.
If PRINT-TO is a string, save the PostScript image in a file with
that name. If PRINT-TO is a number, prompt the user for the name
of the file to save in."
(interactive (list
(file-name-sans-versions (dired-get-filename) t)
(ps-print-preprint current-prefix-arg))
dired-mode)
(mailcap-parse-mailcaps)
(cond
((file-directory-p file-name)
(error "Can't print a directory"))
((file-exists-p file-name)
(let (mime-type method)
(if (and (string-match "\\.[^\\.]+$" file-name)
(setq mime-type
(mailcap-extension-to-mime
(match-string 0 file-name)))
(stringp
(setq method (mailcap-mime-info mime-type "print"
'no-decode))))
(call-process shell-file-name nil
(generate-new-buffer " *mm*")
nil
shell-command-switch
(mm-mailcap-command method file-name mime-type))
(with-temp-buffer
(insert-file-contents file-name)
(if (eq gnus-dired-mail-mode 'gnus-user-agent)
(gnus-print-buffer)
;; FIXME:
(error "MIME print only implemented via Gnus")))
(ps-despool print-to))))
((file-symlink-p file-name)
(error "File is a symlink to a nonexistent target"))
(t
(error "File no longer exists; type `g' to update Dired buffer"))))
(provide 'gnus-dired)
;;; gnus-dired.el ends here
|
