1 ;;; riece-shrink-buffer.el --- free old IRC messages to save memory usage
2 ;; Copyright (C) 1998-2005 Daiki Ueno
4 ;; Author: Daiki Ueno <ueno@unixuser.org>
6 ;; Keywords: IRC, riece
8 ;; This file is part of Riece.
10 ;; This program 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 2, or (at your option)
15 ;; This program 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.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 ;; Boston, MA 02111-1307, USA.
27 ;; NOTE: This is an add-on module for Riece.
31 (require 'riece-globals)
33 (defgroup riece-shrink-buffer nil
34 "Free old IRC messages to save memory usage."
38 (defcustom riece-shrink-buffer-idle-time-delay 5
39 "Number of idle seconds to wait before shrinking channel buffers."
41 :group 'riece-shrink-buffer)
43 (defcustom riece-max-buffer-size 65536
44 "Maximum size of channel buffers."
45 :type '(integer :tag "Number of characters")
46 :group 'riece-shrink-buffer)
48 (defcustom riece-shrink-buffer-remove-chars (/ riece-max-buffer-size 2)
49 "Number of chars removed when shrinking channel buffers."
51 :group 'riece-shrink-buffer)
53 (defvar riece-shrink-buffer-idle-timer nil
54 "Timer object to periodically shrink channel buffers.")
56 (defconst riece-shrink-buffer-description
57 "Free old IRC messages to save memory usage.")
59 (defun riece-shrink-buffer-idle-timer ()
60 (let ((buffers riece-buffer-list))
62 (if (and (get 'riece-shrink-buffer 'riece-addon-enabled)
63 (buffer-live-p (car buffers))
64 (eq (derived-mode-class
65 (with-current-buffer (car buffers)
67 'riece-dialogue-mode))
68 (riece-shrink-buffer (car buffers)))
69 (setq buffers (cdr buffers)))))
71 (defun riece-shrink-buffer (buffer)
74 (goto-char (point-min))
75 (while (> (buffer-size) riece-max-buffer-size)
76 (let* ((inhibit-read-only t)
79 (goto-char riece-shrink-buffer-remove-chars)
82 (overlays (riece-overlays-in (point-min) end)))
84 (riece-delete-overlay (car overlays))
85 (setq overlays (cdr overlays)))
86 (delete-region (point-min) end)))))
88 (defun riece-shrink-buffer-startup-hook ()
89 (setq riece-shrink-buffer-idle-timer
90 (riece-run-with-idle-timer
91 riece-shrink-buffer-idle-time-delay t
92 'riece-shrink-buffer-idle-timer)))
94 (defun riece-shrink-buffer-exit-hook ()
95 (if riece-shrink-buffer-idle-timer
96 (riece-cancel-timer riece-shrink-buffer-idle-timer)))
98 (defun riece-shrink-buffer-insinuate ()
99 (add-hook 'riece-startup-hook
100 'riece-shrink-buffer-startup-hook)
101 ;; Reset the timer since riece-shrink-buffer-insinuate will be
102 ;; called before running riece-startup-hook.
103 (unless riece-shrink-buffer-idle-timer
104 (riece-shrink-buffer-startup-hook))
105 (add-hook 'riece-exit-hook
106 'riece-shrink-buffer-exit-hook))
108 (defun riece-shrink-buffer-uninstall ()
109 (riece-shrink-buffer-exit-hook)
110 (remove-hook 'riece-startup-hook
111 'riece-shrink-buffer-startup-hook)
112 (remove-hook 'riece-exit-hook
113 'riece-shrink-buffer-exit-hook))
115 (provide 'riece-shrink-buffer)
117 ;;; riece-shrink-buffer.el ends here