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;;; erc-list.el --- Proivde a faster channel listing mechanism
;; Copyright (C) 2002 Mario Lang
;; Author: Mario Lang <mlang@lexx.delysid.org>
;; Keywords: comm
;; This file 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 file 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., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;; This file provides a simple derived mode for viewing Channel lists.
;; It also serves as a demonstration of how the new server hook fascility
;; can be used.
;;; Code:
(require 'erc)
(defcustom erc-chanlist-progress-message t
"*Show progress message while accumulating channel list."
:group 'erc
:type 'boolean)
(defvar erc-chanlist-buffer nil)
(make-variable-buffer-local 'erc-chanlist-buffer)
(defvar erc-chanlist-last-time 0)
(define-derived-mode erc-chanlist-mode fundamental-mode "ChanList"
"Mode for viewing a channel list of a particular server.
\\{erc-chanlist-mode-map}")
(define-key erc-chanlist-mode-map "j" 'erc-join-channel)
(define-key erc-chanlist-mode-map "\C-c\C-j" 'erc-join-channel)
(defun erc-chanlist ()
"Show a channel listing of the current server in a special mode.
Please note that this function only works with IRC servers which conform
to RFC and send the LIST header (#321) at start of list transmission."
(interactive)
(with-current-buffer (erc-server-buffer)
(erc-once-with-server-event 321
(add-hook 'erc-server-322-hook 'erc-chanlist-322 nil t)
(erc-once-with-server-event 323
(remove-hook 'erc-server-322-hook 'erc-chanlist-322 t)
(let ((buf erc-chanlist-buffer))
(if (buffer-live-p buf)
(progn
(set-buffer buf)
(let (buffer-read-only)
(sort-lines nil (point-min) (point-max))
(let ((sum (count-lines (point-min) (point-max))))
(goto-char (point-max))
(insert (format "\nTotal %d channels" sum)))
(goto-char (point-min))
(insert (format "%-15s%5s %s\n-------------- ----- ----------\n"
"Channel"
"Users"
"Topic"))
(view-buffer buf)))
(error "`erc-chanlist-buffer' does not refer to a live buffer")))
t)
(setq erc-chanlist-buffer (get-buffer-create (format "*Channels on %s*"
(aref parsed 1))))
(with-current-buffer erc-chanlist-buffer
(setq buffer-read-only nil)
(erase-buffer)
(erc-chanlist-mode)
(setq erc-process proc)
(setq buffer-read-only t))
t)
;; Now that we setup our callbacks, we pull the trigger
(erc-send-command "LIST")))
(defun erc-chanlist-322 (proc parsed)
(let ((chnl (aref parsed 3))
(nv (aref parsed 4))
(topic (aref parsed 5)))
(with-current-buffer erc-chanlist-buffer
(save-excursion
(goto-char (point-max))
(let (buffer-read-only)
(insert (format "%-16s%4s %s\n" chnl nv (erc-interpret-controls topic))))
(when (and erc-chanlist-progress-message
(> (erc-time-diff
erc-chanlist-last-time (erc-current-time))
1))
(setq erc-chanlist-last-time (erc-current-time))
(message "Accumulating information... %c"
(aref [?/ ?| ?\\ ?- ?! ?O ?o] (random 7))))
;; Return success to prevent other hook functions from being run.
t))))
(provide 'erc-list)
;;; erc-list.el ends here
|
