lisp/gnus/score-mode.el

   1 ;;; score-mode.el --- mode for editing Gnus score files
   2
   3 ;; Copyright (C) 1996, 2001-2013 Free Software Foundation, Inc.
   4
   5 ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
   6 ;; Keywords: news, mail
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software: you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation, either version 3 of the License, or
  13 ;; (at your option) any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 ;;; Commentary:
  24
  25 ;;; Code:
  26
  27 (eval-when-compile (require 'cl))
  28 (require 'mm-util)                      ; for mm-universal-coding-system
  29 (require 'gnus-util)                    ; for gnus-pp, gnus-run-mode-hooks
  30
  31 (defvar gnus-score-edit-done-hook nil
  32   "*Hook run at the end of closing the score buffer.")
  33
  34 (defvar gnus-score-mode-hook nil
  35   "*Hook run in score mode buffers.")
  36
  37 (defvar gnus-score-menu-hook nil
  38   "*Hook run after creating the score mode menu.")
  39
  40 (defvar gnus-score-edit-exit-function nil
  41   "Function run on exit from the score buffer.")
  42
  43 (defvar gnus-score-mode-map
  44   (let ((map (make-sparse-keymap)))
  45     (set-keymap-parent map emacs-lisp-mode-map)
  46     (define-key map "\C-c\C-c" 'gnus-score-edit-exit)
  47     (define-key map "\C-c\C-d" 'gnus-score-edit-insert-date)
  48     (define-key map "\C-c\C-p" 'gnus-score-pretty-print)
  49     map))
  50
  51 (defvar score-mode-syntax-table
  52   (let ((table (copy-syntax-table lisp-mode-syntax-table)))
  53     (modify-syntax-entry ?| "w" table)
  54     table)
  55   "Syntax table used in score-mode buffers.")
  56
  57 ;; We need this to cope with non-ASCII scoring.
  58 (defvar score-mode-coding-system mm-universal-coding-system)
  59
  60 ;;;###autoload
  61 (define-derived-mode gnus-score-mode emacs-lisp-mode "Score"
  62   "Mode for editing Gnus score files.
  63 This mode is an extended emacs-lisp mode.
  64
  65 \\{gnus-score-mode-map}"
  66   (gnus-score-make-menu-bar)
  67   (make-local-variable 'gnus-score-edit-exit-function))
  68
  69 (defun gnus-score-make-menu-bar ()
  70   (unless (boundp 'gnus-score-menu)
  71     (easy-menu-define
  72      gnus-score-menu gnus-score-mode-map ""
  73      '("Score"
  74        ["Exit" gnus-score-edit-exit t]
  75        ["Insert date" gnus-score-edit-insert-date t]
  76        ["Format" gnus-score-pretty-print t]))
  77     (run-hooks 'gnus-score-menu-hook)))
  78
  79 (defun gnus-score-edit-insert-date ()
  80   "Insert date in numerical format."
  81   (interactive)
  82   (princ (time-to-days (current-time)) (current-buffer)))
  83
  84 (defun gnus-score-pretty-print ()
  85   "Format the current score file."
  86   (interactive)
  87   (goto-char (point-min))
  88   (let ((form (read (current-buffer))))
  89     (erase-buffer)
  90     (let ((emacs-lisp-mode-syntax-table score-mode-syntax-table))
  91       (gnus-pp form)))
  92   (goto-char (point-min)))
  93
  94 (defun gnus-score-edit-exit ()
  95   "Stop editing the score file."
  96   (interactive)
  97   (unless (file-exists-p (file-name-directory (buffer-file-name)))
  98     (make-directory (file-name-directory (buffer-file-name)) t))
  99   (let ((coding-system-for-write score-mode-coding-system))
 100     (save-buffer))
 101   (bury-buffer (current-buffer))
 102   (let ((buf (current-buffer)))
 103     (when gnus-score-edit-exit-function
 104       (funcall gnus-score-edit-exit-function))
 105     (when (eq buf (current-buffer))
 106       (switch-to-buffer (other-buffer (current-buffer))))))
 107
 108 (provide 'score-mode)
 109
 110 ;;; score-mode.el ends here