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408 lines
14 KiB
EmacsLisp
408 lines
14 KiB
EmacsLisp
;;; mspools.el --- show mail spools waiting to be read
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;; Copyright (C) 1997 Free Software Foundation, Inc.
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;; Author: Stephen Eglen <stephen@anc.ed.ac.uk>
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;; Maintainer: Stephen Eglen <stephen@anc.ed.ac.uk>
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;; Created: 22 Jan 1997
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;; Keywords: mail
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;; location: http://www.anc.ed.ac.uk/~stephen/emacs/
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;; If you use a mail filter (e.g. procmail, filter) to put mail messages in
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;; folders, this file will let you see which folders have mail waiting
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;; to be read in them. It assumes that new mail for the file `folder'
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;; is written by the filter to a file called `folder.spool'. (If the
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;; file writes directly to `folder' you may lose mail if new mail
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;; arrives whilst you are reading the folder in emacs, hence the use
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;; of a spool file.) For example, the following procmail recipe puts
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;; any mail with `emacs' in the subject line into the spool file
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;; `emacs.spool', ready to go into the folder `emacs'.
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;:0:
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;* ^Subject.*emacs
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;emacs.spool
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;; It also assumes that all of your spool files and mail folders live
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;; in the directory pointed to by `mspools-folder-directory', so you must
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;; set this (see Installation).
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;; When you run `mspools-show', it creates a *spools* buffer containing
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;; all of the spools in the folder directory that are waiting to be
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;; read. On each line is the spool name and its size in bytes. Move
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;; to the line of the folder that you would like to read, and then
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;; press return or space. The mailer (VM or RMAIL) should then read
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;; that folder and get the new mail for you. When you return to the
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;; *spools* buffer, you will either see "*" to indicate that the spool
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;; has been read, or the remaining unread spools, depending on the
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;; value of `mspools-update'.
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;; This file should work with both VM and RMAIL. See the variable
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;; `mspools-using-vm' for details.
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;;; Basic installation.
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;; (autoload 'mspools-show "mspools" "Show outstanding mail spools." t)
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;; (setq mspools-folder-directory "~/MAIL/")
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;;
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;; If you use VM, mspools-folder-directory will default to vm-folder-directory
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;; unless you have already given it a value.
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;; Extras.
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;;
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;; (global-set-key '[S-f1] 'mspools-show) ;Bind mspools-show to Shift F1.
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;; (setq mspools-update t) ;Automatically update buffer.
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;; Interface with the mail filter.
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;; We assume that the mail filter drops new mail into the spool
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;; `folder.spool'. If your spool files are something like folder.xyz
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;; for inbox `folder', then do:
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;; (setq mspools-suffix "xyz")
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;; If you use other conventions for your spool files, this code will
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;; need rewriting.
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;; Warning for VM users
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;; Don't use if you are not sure what you are doing. The value of
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;; vm-spool-files is altered, so you may not be able to read incoming
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;; mail with VM if this is incorrectly set.
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;; Useful settings for VM
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;; vm-auto-get-new-mail should be t (the default).
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;; Acknowledgements
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;; Thanks to jond@mitre.org (Jonathan Doughty) for help with code for
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;; setting up vm-spool-files.
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;;; TODO
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;; What if users have mail spools in more than one directory? Extend
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;; mspools-folder-directory to be a list of directories? Currently,
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;; if mail spools are in other directories, the way to read them is to
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;; put a symbolic link to the spool into the mspools-folder-directory.
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;; I was going to add mouse support so that you could click on a line
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;; to visit the buffer. Tell me if you want it, and I can put the
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;; code in (I don't use the mouse much, so I haven't bothered with it
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;; so far).
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;; Rather than showing size in bytes, could we see the number of msgs
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;; waiting? (Could be more time demanding / system dependent).
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;; Maybe just call a perl script to do all the hard work, and
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;; visualise the results in the buffer.
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;; Shrink wrap the buffer to remove excess white-space?
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;;; Code:
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;;; User Variables
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(defgroup mspools nil
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"Show mail spools waiting to be read."
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:group 'mail
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:link '(emacs-commentary-link :tag "Commentary" "mspools.el")
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)
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(defcustom mspools-update nil
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"*Non-nil means update *spools* buffer after visiting any folder."
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:type 'boolean
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:group 'mspools)
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(defcustom mspools-suffix "spool"
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"*Extension used for spool files (not including full stop)."
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:type 'string
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:group 'mspools)
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(defcustom mspools-using-vm (fboundp 'vm)
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"*Non-nil if VM is used as mail reader, otherwise RMAIL is used."
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:type 'boolean
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:group 'mspools)
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(defcustom mspools-folder-directory
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(if (boundp 'vm-folder-directory)
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vm-folder-directory
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"~/MAIL/")
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"*Directory where mail folders are kept. Ensure it has a trailing /.
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Defaults to `vm-folder-directory' if bound else to ~/MAIL/."
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:type 'directory
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:group 'mspools)
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(defcustom mspools-vm-system-mail (or (getenv "MAIL")
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(concat rmail-spool-directory
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(user-login-name)))
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"*Spool file for main mailbox. Only used by VM.
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This needs to be set to your primary mail spool - mspools will not run
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without it. By default this will be set to the environment variable
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$MAIL. Otherwise it will use `rmail-spool-directory' to guess where
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your primary spool is. If this fails, set it to something like
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/usr/spool/mail/login-name."
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:type 'file
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:group 'mspools)
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;;; Internal Variables
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(defvar mspools-files nil
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"List of entries (SPOOL . SIZE) giving spool name and file size.")
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(defvar mspools-files-len nil
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"Length of `mspools-files' list.")
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(defvar mspools-buffer "*spools*"
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"Name of buffer for displaying spool info.")
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(defvar mspools-mode-map nil
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"Keymap for the *spools* buffer.")
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;;; Code
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;;; VM Specific code
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(if mspools-using-vm
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;; set up vm if not already loaded.
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(progn
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(require 'vm-vars)
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(if (and (not vm-init-file-loaded) (file-readable-p vm-init-file))
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(load-file vm-init-file))
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(if (not mspools-folder-directory)
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(setq mspools-folder-directory vm-folder-directory))
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))
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(defun mspools-set-vm-spool-files ()
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"Set value of `vm-spool-files'. Only needed for VM."
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(if (not (file-readable-p mspools-vm-system-mail))
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(error "Need to set mspools-vm-system-mail to the spool for primary inbox"))
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(if (null mspools-folder-directory)
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(error "Set `mspools-folder-directory' to where the spool files are"))
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(setq
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vm-spool-files
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(append
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(list
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;; Main mailbox
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(list vm-primary-inbox
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mspools-vm-system-mail ; your mailbox
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vm-crash-box ;crash for mailbox
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))
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;; Mailing list inboxes
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;; must have VM already loaded to get vm-folder-directory.
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(mapcar '(lambda (s)
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"make the appropriate entry for vm-spool-files"
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(list
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(concat mspools-folder-directory s)
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(concat mspools-folder-directory s "." mspools-suffix)
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(concat mspools-folder-directory s ".crash")))
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;; So I create a vm-spool-files entry for each of those mail drops
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(mapcar 'file-name-sans-extension
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(directory-files mspools-folder-directory nil
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(format "^[^.]+\\.%s" mspools-suffix)))
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))
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))
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;;; MSPOOLS-SHOW -- the main function
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(defun mspools-show ( &optional noshow)
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"Show the list of non-empty spool files in the *spools* buffer.
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Buffer is not displayed if SHOW is non-nil."
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(interactive)
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(if (get-buffer mspools-buffer)
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;; buffer exists
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(progn
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(set-buffer mspools-buffer)
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(setq buffer-read-only nil)
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(delete-region (point-min) (point-max)))
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;; else buffer doesn't exist so create it
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(get-buffer-create mspools-buffer))
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;; generate the list of spool files
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(if mspools-using-vm
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(mspools-set-vm-spool-files))
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(mspools-get-spool-files)
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(if (not noshow) (pop-to-buffer mspools-buffer))
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(setq buffer-read-only t)
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(mspools-mode)
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)
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(defun mspools-visit-spool ()
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"Visit the folder on the current line of the *spools* buffer."
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(interactive)
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(let ( spool-name folder-name)
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(setq spool-name (mspools-get-spool-name))
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(if (null spool-name)
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(message "No spool on current line")
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(setq folder-name (mspools-get-folder-from-spool spool-name))
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;; put in a little "*" to indicate spool file has been read.
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(if (not mspools-update)
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(save-excursion
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(setq buffer-read-only nil)
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(beginning-of-line)
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(insert "*")
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(delete-char 1)
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(setq buffer-read-only t)
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))
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(message "folder %s spool %s" folder-name spool-name)
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(if (eq (count-lines (point-min)
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(save-excursion
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(end-of-line)
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(point)))
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mspools-files-len)
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(next-line (- 1 mspools-files-len)) ;back to top of list
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;; else just on to next line
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(next-line 1))
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;; Choose whether to use VM or RMAIL for reading folder.
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(if mspools-using-vm
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(vm-visit-folder (concat mspools-folder-directory folder-name))
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;; else using RMAIL
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(rmail (concat mspools-folder-directory folder-name))
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(setq rmail-inbox-list
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(list (concat mspools-folder-directory spool-name)))
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(rmail-get-new-mail))
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(if mspools-update
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;; generate new list of spools.
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(save-excursion
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(mspools-show-again 'noshow))))))
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(defun mspools-get-folder-from-spool (name)
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"Return folder name corresponding to the spool file NAME."
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;; Simply strip of the extension.
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(file-name-sans-extension name))
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;; Alternative version if you have more complicated mapping of spool name
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;; to file name.
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;(defun get-folder-from-spool-safe (name)
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; "Return the folder name corresponding to the spool file NAME."
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; (if (string-match "^\\(.*\\)\.spool$" name)
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; (substring name (match-beginning 1) (match-end 1))
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; (error "Could not extract folder name from spool name %s" name)))
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; test
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;(mspools-get-folder-from-spool "happy.spool")
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;(mspools-get-folder-from-spool "happy.sp")
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(defun mspools-get-spool-name ()
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"Return the name of the spool on the current line."
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(let ((line-num (1- (count-lines (point-min)
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(save-excursion
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(end-of-line)
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(point))
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))))
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(car (nth line-num mspools-files))))
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;;; Keymap
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(if mspools-mode-map
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()
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(setq mspools-mode-map (make-sparse-keymap))
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(define-key mspools-mode-map "\C-c\C-c" 'mspools-visit-spool)
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(define-key mspools-mode-map "\C-m" 'mspools-visit-spool)
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(define-key mspools-mode-map " " 'mspools-visit-spool)
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(define-key mspools-mode-map "?" 'mspools-help)
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(define-key mspools-mode-map "q" 'mspools-quit)
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(define-key mspools-mode-map "n" 'next-line)
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(define-key mspools-mode-map "p" 'previous-line)
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(define-key mspools-mode-map "g" 'revert-buffer))
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;;; Spools mode functions
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(defun mspools-revert-buffer (ignore noconfirm)
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"Re-run mspools-show to revert the *spools* buffer."
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(mspools-show 'noshow))
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(defun mspools-show-again (&optional noshow)
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"Update the *spools* buffer. This is useful if mspools-update is
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nil."
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(interactive)
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(mspools-show noshow))
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(defun mspools-help ()
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"Show help for `mspools-mode'."
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(interactive)
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(describe-function 'mspools-mode))
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(defun mspools-quit ()
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"Quit the *spools* buffer."
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(interactive)
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(kill-buffer mspools-buffer))
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(defun mspools-mode ()
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"Major mode for output from mspools-show.
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\\<mspools-mode-map>Move point to one of the items in this buffer, then use
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\\[mspools-visit-spool] to go to the spool that the current line refers to.
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\\[revert-buffer] to regenerate the list of spools.
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\\{mspools-mode-map}"
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(kill-all-local-variables)
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(make-local-variable 'revert-buffer-function)
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(setq revert-buffer-function 'mspools-revert-buffer)
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(use-local-map mspools-mode-map)
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(setq major-mode 'mspools-mode)
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(setq mode-name "MSpools")
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)
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(defun mspools-get-spool-files ()
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"Find the list of spool files and display them in *spools* buffer."
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(let (folders head spool len beg end any)
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(if (null mspools-folder-directory)
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(error "Set `mspools-folder-directory' to where the spool files are"))
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(setq folders (directory-files mspools-folder-directory nil
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(format "^[^.]+\\.%s$" mspools-suffix)))
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(setq folders (mapcar 'mspools-size-folder folders))
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(setq folders (delq nil folders))
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(setq mspools-files folders)
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(setq mspools-files-len (length mspools-files))
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(set-buffer mspools-buffer)
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(while folders
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(setq any t)
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(setq head (car folders))
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(setq spool (car head))
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(setq len (cdr head))
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(setq folders (cdr folders))
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(setq beg (point))
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(insert (format " %10d %s" len spool))
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(setq end (point))
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(insert "\n")
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;;(put-text-property beg end 'mouse-face 'highlight)
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)
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(if any
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(delete-char -1)) ;delete last RET
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(goto-char (point-min))
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))
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(defun mspools-size-folder (spool)
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"Return (SPOOL . SIZE ) iff SIZE of spool file is non-zero."
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;; 7th file attribute is the size of the file in bytes.
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(let ((file (concat mspools-folder-directory spool))
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size)
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(setq file (or (file-symlink-p file) file))
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(setq size (nth 7 (file-attributes file)))
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;; size could be nil if the sym-link points to a non-existent file
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;; so check this first.
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(if (and size (> size 0))
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(cons spool size)
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;; else SPOOL is empty
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nil)))
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(provide 'mspools)
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;;; mspools.el ends here
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