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60370d40 | 1 | ;;; talk.el --- allow several users to talk to each other through Emacs |
5abe8993 | 2 | |
c90f2757 | 3 | ;; Copyright (C) 1995, 2001, 2002, 2003, 2004, 2005, |
409cc4a3 | 4 | ;; 2006, 2007, 2008 Free Software Foundation, Inc. |
b578f267 | 5 | |
30764597 | 6 | ;; Maintainer: FSF |
5abe8993 RS |
7 | ;; Keywords: comm, frames |
8 | ||
9 | ;; This file is part of GNU Emacs. | |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
b4aa6026 | 13 | ;; the Free Software Foundation; either version 3, or (at your option) |
5abe8993 RS |
14 | ;; any later version. |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
b578f267 | 22 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
086add15 LK |
23 | ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
24 | ;; Boston, MA 02110-1301, USA. | |
5abe8993 RS |
25 | |
26 | ;;; Commentary: | |
27 | ||
b578f267 EN |
28 | ;; This is a multi-user talk package that runs in Emacs. |
29 | ;; Use talk-connect to bring a new person into the conversation. | |
5abe8993 RS |
30 | |
31 | ;;; Code: | |
32 | ||
33 | (defvar talk-display-alist nil | |
34 | "Alist of displays on which Emacs talk is now running. | |
35 | Each element has the form (DISPLAY FRAME BUFFER).") | |
36 | ||
37 | ;;;###autoload | |
38 | (defun talk-connect (display) | |
39 | "Connect to display DISPLAY for the Emacs talk group." | |
40 | (interactive "sTalk to display: ") | |
41 | ;; Make sure we have an entry for the current display. | |
42 | (let ((mydisp (cdr (assq 'display (frame-parameters (selected-frame)))))) | |
43 | (talk-add-display mydisp)) | |
44 | ;; Make sure we have an entry for the specified display. | |
45 | (talk-add-display display) | |
46 | ;; Add the new buffers to all talk frames. | |
47 | (talk-update-buffers)) | |
48 | ||
17086732 KL |
49 | ;;;###autoload |
50 | (defun talk () | |
51 | "Connect to the Emacs talk group from the current X display or tty frame." | |
52 | (interactive) | |
b6660415 | 53 | (let ((type (frame-live-p (selected-frame))) |
6ed8eeff | 54 | (display (frame-terminal (selected-frame)))) |
b6660415 KL |
55 | (cond |
56 | ((eq type t) | |
57 | (talk-add-display (selected-frame))) | |
58 | ((eq type 'x) | |
6ed8eeff | 59 | (talk-add-display (frame-terminal (selected-frame)))) |
b6660415 KL |
60 | (t |
61 | (error "Unknown frame type")))) | |
17086732 KL |
62 | (talk-update-buffers)) |
63 | ||
b6660415 KL |
64 | (defun talk-add-display (frame) |
65 | (let* ((display (if (frame-live-p frame) | |
6ed8eeff | 66 | (frame-terminal frame) |
b6660415 KL |
67 | frame)) |
68 | (elt (assoc display talk-display-alist)) | |
6ed8eeff | 69 | (name (concat "*talk-" (terminal-name display) "*")) |
17086732 | 70 | buffer) |
b6660415 KL |
71 | (unless (frame-live-p frame) |
72 | (setq frame (make-frame-on-display display (list (cons 'name name))))) | |
73 | (if (and elt (frame-live-p (nth 1 elt))) | |
74 | (setq frame (nth 1 elt))) | |
17086732 KL |
75 | (if (not (and elt (buffer-name (get-buffer (setq buffer (nth 2 elt)))))) |
76 | (setq buffer (get-buffer-create name))) | |
b6660415 | 77 | (add-to-list 'delete-frame-functions 'talk-handle-delete-frame) |
17086732 | 78 | (setq talk-display-alist |
b6660415 | 79 | (cons (list display frame buffer) (delq elt talk-display-alist))))) |
17086732 | 80 | |
b6660415 KL |
81 | (defun talk-handle-delete-frame (frame) |
82 | (dolist (d talk-display-alist) | |
83 | (when (eq (nth 1 d) frame) | |
84 | (setq talk-display-alist (delq d talk-display-alist)) | |
85 | (talk-update-buffers)))) | |
17086732 | 86 | |
5abe8993 RS |
87 | (defun talk-disconnect () |
88 | "Disconnect this display from the Emacs talk group." | |
c2bef985 | 89 | (interactive) |
5abe8993 RS |
90 | (let* ((mydisp (cdr (assq 'display (frame-parameters (selected-frame))))) |
91 | (elt (assoc mydisp talk-display-alist))) | |
92 | (delete-frame (nth 1 elt)) | |
93 | (kill-buffer (nth 2 elt)) | |
94 | (setq talk-display-alist (delq elt talk-display-alist)) | |
95 | (talk-update-buffers))) | |
96 | ||
97 | (defun talk-update-buffers () | |
98 | "Update all the talk frames so that each shows all the talk buffers." | |
99 | (let ((tail talk-display-alist)) | |
100 | (while tail | |
101 | (let ((frame (nth 1 (car tail))) | |
102 | (this-buffer (nth 2 (car tail))) | |
103 | (buffers | |
104 | (mapcar (function (lambda (elt) (nth 2 elt))) | |
105 | talk-display-alist))) | |
106 | ;; Put this display's own talk buffer | |
107 | ;; at the front of the list. | |
108 | (setq buffers (cons this-buffer (delq this-buffer buffers))) | |
109 | (talk-split-up-frame frame buffers)) | |
110 | (setq tail (cdr tail))))) | |
111 | ||
112 | (defun talk-split-up-frame (frame buffers) | |
113 | "Split FRAME into equal-sized windows displaying the buffers in BUFFERS. | |
114 | Select the first of these windows, displaying the first of the buffers." | |
115 | (let ((lines-per-buffer (/ (frame-height frame) (length buffers))) | |
116 | (old-frame (selected-frame))) | |
117 | (unwind-protect | |
118 | (progn | |
119 | (select-frame frame) | |
120 | (select-window (frame-first-window frame)) | |
121 | (delete-other-windows) | |
122 | (while (progn | |
123 | (switch-to-buffer (car buffers)) | |
124 | (setq buffers (cdr buffers))) | |
125 | (split-window-vertically lines-per-buffer) | |
126 | (other-window 1)) | |
127 | (select-window (frame-first-window frame))) | |
128 | (select-frame old-frame)))) | |
129 | ||
896546cd RS |
130 | (provide 'talk) |
131 | ||
cbee283d | 132 | ;; arch-tag: 7ab0ad88-1788-4886-a44c-ae685e6f8a1a |
5abe8993 | 133 | ;;; talk.el ends here |