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|
;;; fortune.el --- use fortune to create signatures
;; Copyright (C) 1999, 2001-2019 Free Software Foundation, Inc.
;; Author: Holger Schauer <Holger.Schauer@gmx.de>
;; Keywords: games utils mail
;; 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 utility allows you to automatically cut regions to a fortune
;; file. In case that the region stems from an article buffer (mail or
;; news), it will try to automatically determine the author of the
;; fortune. It will also allow you to compile your fortune-database
;; as well as providing a function to extract a fortune for use as your
;; signature.
;; Of course, it can simply display a fortune, too.
;; Use prefix arguments to specify different fortune databases.
;;; Installation:
;; Please check the customize settings -- you will at least have to
;; modify the values of `fortune-dir' and `fortune-file'.
;; I then use this in my .gnus:
;;(message "Making new signature: %s" (fortune-to-signature "~/fortunes/"))
;; This automagically creates a new signature when starting up Gnus.
;; Note that the call to fortune-to-signature specifies a directory in which
;; several fortune-files and their databases are stored.
;; If you like to get a new signature for every message, you can also hook
;; it into message-mode:
;; (add-hook 'message-setup-hook 'fortune-to-signature)
;; This time no fortune-file is specified, so fortune-to-signature would use
;; the default-file as specified by fortune-file.
;; I have also this in my .gnus:
;;(add-hook 'gnus-article-mode-hook
;; (lambda ()
;; (define-key gnus-article-mode-map "i" 'fortune-from-region)))
;; which allows marking a region and then pressing "i" so that the marked
;; region will be automatically added to my favorite fortune-file.
;;; Code:
;;; **************
;;; Customizable Settings
(defgroup fortune nil
"Settings for fortune."
:link '(emacs-commentary-link "fortune.el")
:version "21.1"
:group 'games)
(defgroup fortune-signature nil
"Settings for use of fortune for signatures."
:group 'fortune
:group 'mail)
(defcustom fortune-dir "~/docs/ascii/misc/fortunes/"
"The directory to look in for local fortune cookies files."
:type 'directory
:group 'fortune)
(defcustom fortune-file
(expand-file-name "usenet" fortune-dir)
"The file in which local fortune cookies will be stored."
:type 'file
:group 'fortune)
(defcustom fortune-database-extension ".dat"
"The extension of the corresponding fortune database.
Normally you won't have a reason to change it."
:type 'string
:group 'fortune)
(defcustom fortune-program "fortune"
"Program to select a fortune cookie."
:type 'string
:group 'fortune)
(defcustom fortune-program-options ()
"List of options to pass to the fortune program."
:type '(choice (repeat (string :tag "Option"))
(string :tag "Obsolete string of options"))
:version "23.1"
:group 'fortune)
(defcustom fortune-strfile "strfile"
"Program to compute a new fortune database."
:type 'string
:group 'fortune)
(defcustom fortune-strfile-options ""
"Options to pass to the strfile program (a string)."
:type 'string
:group 'fortune)
(defcustom fortune-quiet-strfile-options "> /dev/null"
"Text added to the command for running `strfile'.
By default it discards the output produced by `strfile'.
Set this to \"\" if you would like to see the output."
:type 'string
:group 'fortune)
(defcustom fortune-always-compile t
"Non-nil means automatically compile fortune files.
If nil, you must invoke `fortune-compile' manually to do that."
:type 'boolean
:group 'fortune)
(defcustom fortune-author-line-prefix " -- "
"Prefix to put before the author name of a fortunate."
:type 'string
:group 'fortune-signature)
(defcustom fortune-fill-column fill-column
"Fill column for fortune files."
:type 'integer
:group 'fortune-signature)
(defcustom fortune-from-mail "private e-mail"
"String to use to characterize that the fortune comes from an e-mail.
No need to add an `in'."
:type 'string
:group 'fortune-signature)
(defcustom fortune-sigstart ""
"Some text to insert before the fortune cookie, in a mail signature."
:type 'string
:group 'fortune-signature)
(defcustom fortune-sigend ""
"Some text to insert after the fortune cookie, in a mail signature."
:type 'string
:group 'fortune-signature)
;; not customizable settings
(defvar fortune-buffer-name "*fortune*")
(defconst fortune-end-sep "\n%\n")
;;; **************
;;; Inserting a new fortune
(defun fortune-append (string &optional interactive file)
"Appends STRING to the fortune FILE.
If INTERACTIVE is non-nil, don't compile the fortune file afterwards."
(setq file (expand-file-name
(substitute-in-file-name (or file fortune-file))))
(if (file-directory-p file)
(error "Cannot append fortune to directory %s" file))
(if interactive ; switch to file and return buffer
(find-file-other-frame file)
(find-file-noselect file))
(let ((fortune-buffer (get-file-buffer file)))
(set-buffer fortune-buffer)
(goto-char (point-max))
(setq fill-column fortune-fill-column)
(setq auto-fill-inhibit-regexp "^%")
(turn-on-auto-fill)
(insert string fortune-end-sep)
(unless interactive
(save-buffer)
(if fortune-always-compile
(fortune-compile file)))))
(defun fortune-ask-file ()
"Asks the user for a file-name."
(expand-file-name
(read-file-name
"Fortune file to use: "
fortune-dir nil nil "")))
;;;###autoload
(defun fortune-add-fortune (string file)
"Add STRING to a fortune file FILE.
Interactively, if called with a prefix argument,
read the file name to use. Otherwise use the value of `fortune-file'."
(interactive
(list (read-string "Fortune: ")
(if current-prefix-arg (fortune-ask-file))))
(fortune-append string t file))
;;;###autoload
(defun fortune-from-region (beg end file)
"Append the current region to a local fortune-like data file.
Interactively, if called with a prefix argument,
read the file name to use. Otherwise use the value of `fortune-file'."
(interactive
(list (region-beginning) (region-end)
(if current-prefix-arg (fortune-ask-file))))
(let ((string (buffer-substring beg end))
author newsgroup help-point)
;; try to determine author ...
(save-excursion
(goto-char (point-min))
(setq help-point
(search-forward-regexp
"^From: \\(.*\\)$"
(point-max) t))
(if help-point
(setq author (buffer-substring (match-beginning 1) help-point))
(setq author "An unknown author")))
;; ... and newsgroup
(save-excursion
(goto-char (point-min))
(setq help-point
(search-forward-regexp
"^Newsgroups: \\(.*\\)$"
(point-max) t))
(if help-point
(setq newsgroup (buffer-substring (match-beginning 1) help-point))
(setq newsgroup (if (or (eq major-mode 'gnus-article-mode)
(eq major-mode 'vm-mode)
(eq major-mode 'rmail-mode))
fortune-from-mail
"unknown"))))
;; append entry to end of fortune file, and display result
(setq string (concat "\"" string "\""
"\n"
fortune-author-line-prefix
author " in " newsgroup))
(fortune-append string t file)))
;;; **************
;;; Compile new database with strfile
;;;###autoload
(defun fortune-compile (&optional file)
"Compile fortune file.
If called with a prefix asks for the FILE to compile, otherwise uses
the value of `fortune-file'. This currently cannot handle directories."
(interactive
(list
(if current-prefix-arg
(fortune-ask-file)
fortune-file)))
(let* ((fortune-file (expand-file-name (substitute-in-file-name file)))
(fortune-dat (expand-file-name
(substitute-in-file-name
(concat fortune-file fortune-database-extension)))))
(cond ((file-exists-p fortune-file)
(cond ((file-newer-than-file-p fortune-file fortune-dat)
(message "Compiling new fortune database %s" fortune-dat)
(shell-command
(concat fortune-strfile fortune-strfile-options
" " fortune-file fortune-quiet-strfile-options)))))
(t (error "Can't compile fortune file %s" fortune-file)))))
;;; **************
;;; Use fortune for signature
;;;###autoload
(defun fortune-to-signature (&optional file)
"Create signature from output of the fortune program.
If called with a prefix asks for the FILE to choose the fortune from,
otherwise uses the value of `fortune-file'. If you want to have fortune
choose from a set of files in a directory, call interactively with prefix
and choose the directory as the fortune-file."
(interactive
(list
(if current-prefix-arg
(fortune-ask-file)
fortune-file)))
(save-excursion
(fortune-in-buffer t file)
(set-buffer fortune-buffer-name)
(let* ((fortune (buffer-string))
(signature (concat fortune-sigstart fortune fortune-sigend)))
(setq mail-signature signature)
(if (boundp 'message-signature)
(setq message-signature signature)))))
;;; **************
;;; Display fortune
(defun fortune-in-buffer (_interactive &optional file)
"Put a fortune cookie in the *fortune* buffer.
INTERACTIVE is ignored. Optional argument FILE, when supplied,
specifies the file to choose the fortune from."
(let ((fortune-buffer (or (get-buffer fortune-buffer-name)
(generate-new-buffer fortune-buffer-name)))
(fort-file (expand-file-name
(substitute-in-file-name
(or file fortune-file)))))
(with-current-buffer fortune-buffer
(let ((inhibit-read-only t))
(erase-buffer)
(if fortune-always-compile
(fortune-compile fort-file))
(apply 'call-process
fortune-program ; program to call
nil fortune-buffer nil ; INFILE BUFFER DISPLAY
(append (if (stringp fortune-program-options)
(split-string fortune-program-options)
fortune-program-options) (list fort-file)))))))
;;;###autoload
(defun fortune-message (&optional file)
"Display a fortune cookie to the mini-buffer.
If called with a prefix, it has the same behavior as `fortune'.
Optional FILE is a fortune file from which a cookie will be selected."
(interactive (list (if current-prefix-arg
(fortune-ask-file)
fortune-file)))
(with-temp-buffer
(let ((fortune-buffer-name (current-buffer)))
(fortune-in-buffer t file)
;; Avoid trailing newline.
(if (bolp) (delete-char -1))
(message "%s" (buffer-string)))))
;;;###autoload
(defun fortune (&optional file)
"Display a fortune cookie.
If called with a prefix asks for the FILE to choose the fortune from,
otherwise uses the value of `fortune-file'. If you want to have fortune
choose from a set of files in a directory, call interactively with prefix
and choose the directory as the fortune-file."
(interactive (list (if current-prefix-arg
(fortune-ask-file)
fortune-file)))
(fortune-in-buffer t file)
(switch-to-buffer (get-buffer fortune-buffer-name))
(setq buffer-read-only t))
;;; Provide ourselves.
(provide 'fortune)
;;; fortune.el ends here
|
