1 ;;; talk.el --- allow several users to talk to each other through Emacs
3 ;; Copyright (C) 1995, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
6 ;; Keywords: comm, frames
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software; you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation; either version 2, or (at your option)
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs; see the file COPYING. If not, write to the
22 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
23 ;; Boston, MA 02110-1301, USA.
27 ;; This is a multi-user talk package that runs in Emacs.
28 ;; Use talk-connect to bring a new person into the conversation.
32 (defvar talk-display-alist nil
33 "Alist of displays on which Emacs talk is now running.
34 Each element has the form (DISPLAY FRAME BUFFER).")
37 (defun talk-connect (display)
38 "Connect to display DISPLAY for the Emacs talk group."
39 (interactive "sTalk to display: ")
40 ;; Make sure we have an entry for the current display.
41 (let ((mydisp (cdr (assq 'display
(frame-parameters (selected-frame))))))
42 (talk-add-display mydisp
))
43 ;; Make sure we have an entry for the specified display.
44 (talk-add-display display
)
45 ;; Add the new buffers to all talk frames.
46 (talk-update-buffers))
50 "Connect to the Emacs talk group from the current X display or tty frame."
52 (let ((type (frame-live-p (selected-frame)))
53 (display (frame-terminal (selected-frame))))
56 (talk-add-display (selected-frame)))
58 (talk-add-display (frame-terminal (selected-frame))))
60 (error "Unknown frame type"))))
61 (talk-update-buffers))
63 (defun talk-add-display (frame)
64 (let* ((display (if (frame-live-p frame
)
65 (frame-terminal frame
)
67 (elt (assoc display talk-display-alist
))
68 (name (concat "*talk-" (terminal-name display
) "*"))
70 (unless (frame-live-p frame
)
71 (setq frame
(make-frame-on-display display
(list (cons 'name name
)))))
72 (if (and elt
(frame-live-p (nth 1 elt
)))
73 (setq frame
(nth 1 elt
)))
74 (if (not (and elt
(buffer-name (get-buffer (setq buffer
(nth 2 elt
))))))
75 (setq buffer
(get-buffer-create name
)))
76 (add-to-list 'delete-frame-functions
'talk-handle-delete-frame
)
77 (setq talk-display-alist
78 (cons (list display frame buffer
) (delq elt talk-display-alist
)))))
80 (defun talk-handle-delete-frame (frame)
81 (dolist (d talk-display-alist
)
82 (when (eq (nth 1 d
) frame
)
83 (setq talk-display-alist
(delq d talk-display-alist
))
84 (talk-update-buffers))))
86 (defun talk-disconnect ()
87 "Disconnect this display from the Emacs talk group."
89 (let* ((mydisp (cdr (assq 'display
(frame-parameters (selected-frame)))))
90 (elt (assoc mydisp talk-display-alist
)))
91 (delete-frame (nth 1 elt
))
92 (kill-buffer (nth 2 elt
))
93 (setq talk-display-alist
(delq elt talk-display-alist
))
94 (talk-update-buffers)))
96 (defun talk-update-buffers ()
97 "Update all the talk frames so that each shows all the talk buffers."
98 (let ((tail talk-display-alist
))
100 (let ((frame (nth 1 (car tail
)))
101 (this-buffer (nth 2 (car tail
)))
103 (mapcar (function (lambda (elt) (nth 2 elt
)))
104 talk-display-alist
)))
105 ;; Put this display's own talk buffer
106 ;; at the front of the list.
107 (setq buffers
(cons this-buffer
(delq this-buffer buffers
)))
108 (talk-split-up-frame frame buffers
))
109 (setq tail
(cdr tail
)))))
111 (defun talk-split-up-frame (frame buffers
)
112 "Split FRAME into equal-sized windows displaying the buffers in BUFFERS.
113 Select the first of these windows, displaying the first of the buffers."
114 (let ((lines-per-buffer (/ (frame-height frame
) (length buffers
)))
115 (old-frame (selected-frame)))
119 (select-window (frame-first-window frame
))
120 (delete-other-windows)
122 (switch-to-buffer (car buffers
))
123 (setq buffers
(cdr buffers
)))
124 (split-window-vertically lines-per-buffer
)
126 (select-window (frame-first-window frame
)))
127 (select-frame old-frame
))))
131 ;;; arch-tag: 7ab0ad88-1788-4886-a44c-ae685e6f8a1a
132 ;;; talk.el ends here