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;;; riece-shrink-buffer.el --- free old IRC messages to save memory usage
;; Copyright (C) 1998-2005 Daiki Ueno
;; Author: Daiki Ueno <ueno@unixuser.org>
;; Created: 1998-09-28
;; Keywords: IRC, riece
;; This file is part of Riece.
;; This program 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 2, or (at your option)
;; any later version.
;; This program 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; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;; NOTE: This is an add-on module for Riece.
;;; Code:
(require 'riece-globals)
(defgroup riece-shrink-buffer nil
"Free old IRC messages to save memory usage."
:prefix "riece-"
:group 'riece)
(defcustom riece-shrink-buffer-idle-time-delay 5
"Number of idle seconds to wait before shrinking channel buffers."
:type 'integer
:group 'riece-shrink-buffer)
(defcustom riece-max-buffer-size 65536
"Maximum size of channel buffers."
:type '(integer :tag "Number of characters")
:group 'riece-shrink-buffer)
(defcustom riece-shrink-buffer-remove-chars (/ riece-max-buffer-size 2)
"Number of chars removed when shrinking channel buffers."
:type 'integer
:group 'riece-shrink-buffer)
(defvar riece-shrink-buffer-idle-timer nil
"Timer object to periodically shrink channel buffers.")
(defconst riece-shrink-buffer-description
"Free old IRC messages to save memory usage.")
(defun riece-shrink-buffer-idle-timer ()
(let ((buffers riece-buffer-list))
(while buffers
(if (and (get 'riece-shrink-buffer 'riece-addon-enabled)
(buffer-live-p (car buffers))
(eq (derived-mode-class
(with-current-buffer (car buffers)
major-mode))
'riece-dialogue-mode))
(riece-shrink-buffer (car buffers)))
(setq buffers (cdr buffers)))))
(defun riece-shrink-buffer (buffer)
(save-excursion
(set-buffer buffer)
(goto-char (point-min))
(while (> (buffer-size) riece-max-buffer-size)
(let* ((inhibit-read-only t)
buffer-read-only
(end (progn
(goto-char riece-shrink-buffer-remove-chars)
(beginning-of-line 2)
(point)))
(overlays (riece-overlays-in (point-min) end)))
(while overlays
(riece-delete-overlay (car overlays))
(setq overlays (cdr overlays)))
(delete-region (point-min) end)))))
(defun riece-shrink-buffer-startup-hook ()
(setq riece-shrink-buffer-idle-timer
(riece-run-with-idle-timer
riece-shrink-buffer-idle-time-delay t
'riece-shrink-buffer-idle-timer)))
(defun riece-shrink-buffer-exit-hook ()
(if riece-shrink-buffer-idle-timer
(riece-cancel-timer riece-shrink-buffer-idle-timer)))
(defun riece-shrink-buffer-insinuate ()
(add-hook 'riece-startup-hook
'riece-shrink-buffer-startup-hook)
;; Reset the timer since riece-shrink-buffer-insinuate will be
;; called before running riece-startup-hook.
(unless riece-shrink-buffer-idle-timer
(riece-shrink-buffer-startup-hook))
(add-hook 'riece-exit-hook
'riece-shrink-buffer-exit-hook))
(defun riece-shrink-buffer-uninstall ()
(riece-shrink-buffer-exit-hook)
(remove-hook 'riece-startup-hook
'riece-shrink-buffer-startup-hook)
(remove-hook 'riece-exit-hook
'riece-shrink-buffer-exit-hook))
(provide 'riece-shrink-buffer)
;;; riece-shrink-buffer.el ends here
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