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;;; jabber-chatstate.el --- Chat state notification (XEP-0085) implementation
;; Author: Ami Fischman <ami@fischman.org>
;; (based entirely on jabber-events.el by Magnus Henoch <mange@freemail.hu>)
;; 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.
;; TODO
;; - Currently only active/composing notifications are /sent/ though all 5
;; notifications are handled on receipt.
(require 'cl)
(defgroup jabber-chatstates nil
"Chat state notifications."
:group 'jabber)
(defconst jabber-chatstates-xmlns "http://jabber.org/protocol/chatstates"
"XML namespace for the chatstates feature.")
(defcustom jabber-chatstates-confirm t
"Send notifications about chat states?"
:group 'jabber-chatstates
:type 'boolean)
(defvar jabber-chatstates-requested 'first-time
"Whether or not chat states notification was requested.
This is one of the following:
first-time - send state in first stanza, then switch to nil
t - send states
nil - don't send states")
(make-variable-buffer-local 'jabber-chatstates-requested)
(defvar jabber-chatstates-last-state nil
"The last seen chat state.")
(make-variable-buffer-local 'jabber-chatstates-last-state)
(defvar jabber-chatstates-message ""
"Human-readable presentation of chat state information")
(make-variable-buffer-local 'jabber-chatstates-message)
;;; INCOMING
;;; Code for requesting chat state notifications from others and handling
;;; them.
(defun jabber-chatstates-update-message ()
(setq jabber-chatstates-message
(if (and jabber-chatstates-last-state
(not (eq 'active jabber-chatstates-last-state)))
(format " (%s)" (symbol-name jabber-chatstates-last-state))
"")))
(add-hook 'jabber-chat-send-hooks 'jabber-chatstates-when-sending)
(defun jabber-chatstates-when-sending (text id)
(jabber-chatstates-update-message)
(jabber-chatstates-stop-timer)
(when (and jabber-chatstates-confirm jabber-chatstates-requested)
(when (eq jabber-chatstates-requested 'first-time)
;; don't send more notifications until we know that the other
;; side wants them.
(setq jabber-chatstates-requested nil))
(setq jabber-chatstates-composing-sent nil)
`((active ((xmlns . ,jabber-chatstates-xmlns))))))
;;; OUTGOING
;;; Code for handling requests for chat state notifications and providing
;;; them, modulo user preferences.
(defvar jabber-chatstates-composing-sent nil
"Has composing notification been sent?
It can be sent and cancelled several times.")
(make-variable-buffer-local 'jabber-chatstates-composing-sent)
(defvar jabber-chatstates-paused-timer nil
"Timer that counts down from 'composing state to 'paused.")
(make-variable-buffer-local 'jabber-chatstates-paused-timer)
(defun jabber-chatstates-stop-timer ()
"Stop the 'paused timer."
(when jabber-chatstates-paused-timer
(cancel-timer jabber-chatstates-paused-timer)))
(defun jabber-chatstates-kick-timer ()
"Start (or restart) the 'paused timer as approriate."
(jabber-chatstates-stop-timer)
(setq jabber-chatstates-paused-timer
(run-with-timer 5 nil 'jabber-chatstates-send-paused)))
(defun jabber-chatstates-send-paused ()
"Send an 'paused state notification."
(when (and jabber-chatstates-requested jabber-chatting-with)
(setq jabber-chatstates-composing-sent nil)
(jabber-send-sexp-if-connected
jabber-buffer-connection
`(message
((to . ,jabber-chatting-with)
(type . "chat"))
(paused ((xmlns . ,jabber-chatstates-xmlns)))))))
(defun jabber-chatstates-after-change ()
(let* ((composing-now (not (= (point-max) jabber-point-insert)))
(state (if composing-now 'composing 'active)))
(when (and jabber-chatstates-confirm
jabber-chatting-with
jabber-chatstates-requested
(not (eq composing-now jabber-chatstates-composing-sent)))
(jabber-send-sexp-if-connected
jabber-buffer-connection
`(message
((to . ,jabber-chatting-with)
(type . "chat"))
(,state ((xmlns . ,jabber-chatstates-xmlns)))))
(when (setq jabber-chatstates-composing-sent composing-now)
(jabber-chatstates-kick-timer)))))
;;; COMMON
(defun jabber-handle-incoming-message-chatstates (jc xml-data)
(when (get-buffer (jabber-chat-get-buffer (jabber-xml-get-attribute xml-data 'from)))
(with-current-buffer (jabber-chat-get-buffer (jabber-xml-get-attribute xml-data 'from))
(cond
;; If we get an error message, we shouldn't report any
;; events, as the requests are mirrored from us.
((string= (jabber-xml-get-attribute xml-data 'type) "error")
(remove-hook 'post-command-hook 'jabber-chatstates-after-change t)
(setq jabber-chatstates-requested nil))
(t
(let ((state
(or
(let ((node
(find jabber-chatstates-xmlns
(jabber-xml-node-children xml-data)
:key #'(lambda (x) (jabber-xml-get-attribute x 'xmlns))
:test #'string=)))
(jabber-xml-node-name node))
(let ((node
;; XXX: this is how we interoperate with
;; Google Talk. We should really use a
;; namespace-aware XML parser.
(find jabber-chatstates-xmlns
(jabber-xml-node-children xml-data)
:key #'(lambda (x) (jabber-xml-get-attribute x 'xmlns:cha))
:test #'string=)))
(when node
;; Strip the "cha:" prefix
(let ((name (symbol-name (jabber-xml-node-name node))))
(when (> (length name) 4)
(intern (substring name 4)))))))))
;; Set up hooks for composition notification
(when (and jabber-chatstates-confirm state)
(setq jabber-chatstates-requested t)
(add-hook 'post-command-hook 'jabber-chatstates-after-change nil t))
(setq jabber-chatstates-last-state state)
(jabber-chatstates-update-message)))))))
;; Add function last in chain, so a chat buffer is already created.
(add-to-list 'jabber-message-chain 'jabber-handle-incoming-message-chatstates t)
(jabber-disco-advertise-feature "http://jabber.org/protocol/chatstates")
(provide 'jabber-chatstates)
;; arch-tag: d879de90-51e1-11dc-909d-000a95c2fcd0
|
