jabber-truncate.el

   1 ;; jabber-truncate.el - cleanup top lines in chatbuffers
   2
   3 ;; Copyright (C) 2007 - Kirill A. Korinskiy - catap@catap.ru
   4
   5 ;; This file is a part of jabber.el.
   6
   7 ;; This program is free software; you can redistribute it and/or modify
   8 ;; it under the terms of the GNU General Public License as published by
   9 ;; the Free Software Foundation; either version 2 of the License, or
  10 ;; (at your option) any later version.
  11
  12 ;; This program is distributed in the hope that it will be useful,
  13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 ;; GNU General Public License for more details.
  16
  17 ;; You should have received a copy of the GNU General Public License
  18 ;; along with this program; if not, write to the Free Software
  19 ;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20
  21 (require 'jabber-chat)
  22 (eval-when-compile (require 'cl))
  23
  24 (defvar jabber-log-lines-to-keep 1000
  25   "Maximum number of lines in chat buffer")
  26
  27 (defun jabber-truncate-top ()
  28   "Clean old history from a chat buffer.
  29 `jabber-log-lines-to-keep' specifies the number of lines to
  30 keep."
  31   (interactive)
  32   (let ((inhibit-read-only t)
  33         (delete-before
  34          ;; go back one node, to make this function "idempotent"
  35          (ewoc-prev
  36           jabber-chat-ewoc
  37           (ewoc-locate jabber-chat-ewoc
  38                        (save-excursion
  39                          (goto-char (point-max))
  40                          (forward-line (- jabber-log-lines-to-keep))
  41                          (point))))))
  42     (while delete-before
  43       (setq delete-before
  44             (prog1
  45                 (ewoc-prev jabber-chat-ewoc delete-before)
  46               (ewoc-delete jabber-chat-ewoc delete-before))))))
  47
  48 (defun jabber-truncate-muc (nick group buffer text proposed-alert)
  49   "Clean old history from MUC buffers.
  50 `jabber-log-lines-to-keep' specifies the number of lines to
  51 keep."
  52   (jabber-truncate-top))
  53
  54 (defun jabber-truncate-chat (from buffer text proposed-alert)
  55   "Clean old history from chat buffers.
  56 `jabber-log-lines-to-keep' specifies the number of lines to
  57 keep.
  58
  59 Note that this might interfer with
  60 `jabber-chat-display-more-backlog': you ask for more history, you
  61 get it, and then it just gets deleted."
  62   (jabber-truncate-top))
  63
  64 (pushnew 'jabber-truncate-muc (get 'jabber-alert-muc-hooks 'custom-options))
  65 (pushnew 'jabber-truncate-chat (get 'jabber-alert-message-hooks 'custom-options))
  66
  67 (provide 'jabber-truncate)
  68
  69 ;; arch-tag: 3d1e3428-f598-11db-a314-000a95c2fcd0