djavu-asus/emacs/elpa/jabber-20230715.456/jabber-truncate.el

   1 ;; jabber-truncate.el - cleanup top lines in chatbuffers  -*- lexical-binding: t; -*-
   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 (require 'jabber-alert)
  23
  24 (require 'cl-lib)
  25
  26 (defvar jabber-log-lines-to-keep 1000
  27   "Maximum number of lines in chat buffer.")
  28
  29 (defun jabber-truncate-top (buffer &optional ewoc)
  30   "Clean old history from a chat BUFFER.
  31 Optional EWOC is ewoc-widget to work. Default is
  32 `jabber-chat-ewoc'. `jabber-log-lines-to-keep' specifies the
  33 number of lines to keep.
  34
  35 Note that this might interfere with
  36 `jabber-chat-display-more-backlog': you ask for more history, you
  37 get it, and then it just gets deleted."
  38   (interactive)
  39     (let* ((inhibit-read-only t)
  40            (work-ewoc (if ewoc ewoc jabber-chat-ewoc))
  41           (delete-before
  42            ;; go back one node, to make this function "idempotent"
  43            (ewoc-prev
  44             work-ewoc
  45             (ewoc-locate work-ewoc
  46                          (save-excursion
  47                            (set-buffer buffer)
  48                            (goto-char (point-max))
  49                            (forward-line (- jabber-log-lines-to-keep))
  50                            (point))))))
  51       (while delete-before
  52         (setq delete-before
  53               (prog1
  54                   (ewoc-prev work-ewoc delete-before)
  55                 (ewoc-delete work-ewoc delete-before))))))
  56
  57 (defun jabber-truncate-muc (nick group buffer text proposed-alert)
  58   "Clean old history from MUC buffers.
  59 `jabber-log-lines-to-keep' specifies the number of lines to
  60 keep."
  61   (jabber-truncate-top buffer))
  62
  63 (defun jabber-truncate-chat (from buffer text proposed-alert)
  64   "Clean old history from chat buffers.
  65 `jabber-log-lines-to-keep' specifies the number of lines to
  66 keep.
  67
  68 Note that this might interfer with
  69 `jabber-chat-display-more-backlog': you ask for more history, you
  70 get it, and then it just gets deleted."
  71   (jabber-truncate-top buffer))
  72
  73 (provide 'jabber-truncate)
  74
  75 ;; arch-tag: 3d1e3428-f598-11db-a314-000a95c2fcd0