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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 | ||
eb3fa2cf | 11 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
5abe8993 | 12 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
13 | ;; the Free Software Foundation, either version 3 of the License, or |
14 | ;; (at your option) any later version. | |
5abe8993 RS |
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 | |
eb3fa2cf | 22 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
5abe8993 RS |
23 | |
24 | ;;; Commentary: | |
25 | ||
b578f267 EN |
26 | ;; This is a multi-user talk package that runs in Emacs. |
27 | ;; Use talk-connect to bring a new person into the conversation. | |
5abe8993 RS |
28 | |
29 | ;;; Code: | |
30 | ||
31 | (defvar talk-display-alist nil | |
32 | "Alist of displays on which Emacs talk is now running. | |
33 | Each element has the form (DISPLAY FRAME BUFFER).") | |
34 | ||
35 | ;;;###autoload | |
36 | (defun talk-connect (display) | |
37 | "Connect to display DISPLAY for the Emacs talk group." | |
38 | (interactive "sTalk to display: ") | |
39 | ;; Make sure we have an entry for the current display. | |
40 | (let ((mydisp (cdr (assq 'display (frame-parameters (selected-frame)))))) | |
41 | (talk-add-display mydisp)) | |
42 | ;; Make sure we have an entry for the specified display. | |
43 | (talk-add-display display) | |
44 | ;; Add the new buffers to all talk frames. | |
45 | (talk-update-buffers)) | |
46 | ||
17086732 KL |
47 | ;;;###autoload |
48 | (defun talk () | |
49 | "Connect to the Emacs talk group from the current X display or tty frame." | |
50 | (interactive) | |
b6660415 | 51 | (let ((type (frame-live-p (selected-frame))) |
6ed8eeff | 52 | (display (frame-terminal (selected-frame)))) |
a1feed48 CY |
53 | (if (or (eq type t) (eq type 'x)) |
54 | (talk-add-display | |
55 | (terminal-name (frame-terminal (selected-frame)))) | |
56 | (error "Unknown frame type"))) | |
17086732 KL |
57 | (talk-update-buffers)) |
58 | ||
a1feed48 CY |
59 | (defun talk-add-display (display) |
60 | (let* ((elt (assoc display talk-display-alist)) | |
61 | (name (concat "*talk-" display "*")) | |
62 | frame buffer) | |
b6660415 | 63 | (if (and elt (frame-live-p (nth 1 elt))) |
a1feed48 CY |
64 | (setq frame (nth 1 elt)) |
65 | (setq frame (make-frame-on-display display (list (cons 'name name))))) | |
17086732 KL |
66 | (if (not (and elt (buffer-name (get-buffer (setq buffer (nth 2 elt)))))) |
67 | (setq buffer (get-buffer-create name))) | |
b6660415 | 68 | (add-to-list 'delete-frame-functions 'talk-handle-delete-frame) |
17086732 | 69 | (setq talk-display-alist |
b6660415 | 70 | (cons (list display frame buffer) (delq elt talk-display-alist))))) |
17086732 | 71 | |
b6660415 KL |
72 | (defun talk-handle-delete-frame (frame) |
73 | (dolist (d talk-display-alist) | |
74 | (when (eq (nth 1 d) frame) | |
75 | (setq talk-display-alist (delq d talk-display-alist)) | |
76 | (talk-update-buffers)))) | |
17086732 | 77 | |
5abe8993 RS |
78 | (defun talk-disconnect () |
79 | "Disconnect this display from the Emacs talk group." | |
c2bef985 | 80 | (interactive) |
5abe8993 RS |
81 | (let* ((mydisp (cdr (assq 'display (frame-parameters (selected-frame))))) |
82 | (elt (assoc mydisp talk-display-alist))) | |
83 | (delete-frame (nth 1 elt)) | |
84 | (kill-buffer (nth 2 elt)) | |
85 | (setq talk-display-alist (delq elt talk-display-alist)) | |
86 | (talk-update-buffers))) | |
87 | ||
88 | (defun talk-update-buffers () | |
89 | "Update all the talk frames so that each shows all the talk buffers." | |
90 | (let ((tail talk-display-alist)) | |
91 | (while tail | |
92 | (let ((frame (nth 1 (car tail))) | |
93 | (this-buffer (nth 2 (car tail))) | |
94 | (buffers | |
95 | (mapcar (function (lambda (elt) (nth 2 elt))) | |
96 | talk-display-alist))) | |
97 | ;; Put this display's own talk buffer | |
98 | ;; at the front of the list. | |
99 | (setq buffers (cons this-buffer (delq this-buffer buffers))) | |
100 | (talk-split-up-frame frame buffers)) | |
101 | (setq tail (cdr tail))))) | |
102 | ||
103 | (defun talk-split-up-frame (frame buffers) | |
104 | "Split FRAME into equal-sized windows displaying the buffers in BUFFERS. | |
105 | Select the first of these windows, displaying the first of the buffers." | |
106 | (let ((lines-per-buffer (/ (frame-height frame) (length buffers))) | |
107 | (old-frame (selected-frame))) | |
108 | (unwind-protect | |
109 | (progn | |
110 | (select-frame frame) | |
111 | (select-window (frame-first-window frame)) | |
112 | (delete-other-windows) | |
113 | (while (progn | |
114 | (switch-to-buffer (car buffers)) | |
115 | (setq buffers (cdr buffers))) | |
116 | (split-window-vertically lines-per-buffer) | |
117 | (other-window 1)) | |
118 | (select-window (frame-first-window frame))) | |
119 | (select-frame old-frame)))) | |
120 | ||
896546cd RS |
121 | (provide 'talk) |
122 | ||
cbee283d | 123 | ;; arch-tag: 7ab0ad88-1788-4886-a44c-ae685e6f8a1a |
5abe8993 | 124 | ;;; talk.el ends here |