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., 51 Franklin Street, Fifth Floor,
23 ;; Boston, MA 02110-1301, USA.
27 ;; NOTE: This is an add-on module for Riece.
31 (require 'riece-globals)
34 (defgroup riece-shrink-buffer nil
35 "Free old IRC messages to save memory usage."
39 (defcustom riece-shrink-buffer-idle-time-delay 5
40 "Number of idle seconds to wait before shrinking channel buffers."
42 :group 'riece-shrink-buffer)
44 (defcustom riece-max-buffer-size 65536
45 "Maximum size of channel buffers."
46 :type '(integer :tag "Number of characters")
47 :group 'riece-shrink-buffer)
49 (defcustom riece-shrink-buffer-remove-chars (/ riece-max-buffer-size 2)
50 "Number of chars removed when shrinking channel buffers."
52 :group 'riece-shrink-buffer)
54 (defvar riece-shrink-buffer-idle-timer nil
55 "Timer object to periodically shrink channel buffers.")
57 (defconst riece-shrink-buffer-description
58 "Free old IRC messages to save memory usage.")
60 (defun riece-shrink-buffer-idle-timer ()
61 (let ((buffers riece-buffer-list))
63 (if (and (get 'riece-shrink-buffer 'riece-addon-enabled)
64 (buffer-live-p (car buffers))
65 (eq (derived-mode-class
66 (with-current-buffer (car buffers)
68 'riece-dialogue-mode))
69 (riece-shrink-buffer (car buffers)))
70 (setq buffers (cdr buffers)))))
72 (defun riece-shrink-buffer (buffer)
75 (goto-char (point-min))
76 (while (> (buffer-size) riece-max-buffer-size)
77 (let* ((inhibit-read-only t)
80 (goto-char riece-shrink-buffer-remove-chars)
83 (overlays (riece-overlays-in (point-min) end)))
85 (riece-delete-overlay (car overlays))
86 (setq overlays (cdr overlays)))
87 (delete-region (point-min) end)))))
89 (defun riece-shrink-buffer-startup-hook ()
90 (setq riece-shrink-buffer-idle-timer
91 (riece-run-with-idle-timer
92 riece-shrink-buffer-idle-time-delay t
93 'riece-shrink-buffer-idle-timer)))
95 (defun riece-shrink-buffer-exit-hook ()
96 (if riece-shrink-buffer-idle-timer
97 (riece-cancel-timer riece-shrink-buffer-idle-timer)))
99 (defun riece-shrink-buffer-insinuate ()
100 (add-hook 'riece-startup-hook
101 'riece-shrink-buffer-startup-hook)
102 ;; Reset the timer since riece-shrink-buffer-insinuate will be
103 ;; called before running riece-startup-hook.
104 (unless riece-shrink-buffer-idle-timer
105 (riece-shrink-buffer-startup-hook))
106 (add-hook 'riece-exit-hook
107 'riece-shrink-buffer-exit-hook))
109 (defun riece-shrink-buffer-uninstall ()
110 (riece-shrink-buffer-exit-hook)
111 (remove-hook 'riece-startup-hook
112 'riece-shrink-buffer-startup-hook)
113 (remove-hook 'riece-exit-hook
114 'riece-shrink-buffer-exit-hook))
116 (provide 'riece-shrink-buffer)
118 ;;; riece-shrink-buffer.el ends here