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- ;;; talk.el --- Allow several users to talk to each other through Emacs.
-
- ;; Copyright (C) 1995 Free Software Foundation, Inc.
-
- ;; Keywords: comm, frames
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs 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.
-
- ;; GNU Emacs 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 is a multi-user talk package that runs in Emacs.
- ;; Use talk-connect to bring a new person into the conversation.
-
- ;;; Code:
-
- (defvar talk-display-alist nil
- "Alist of displays on which Emacs talk is now running.
- Each element has the form (DISPLAY FRAME BUFFER).")
-
- ;;;###autoload
- (defun talk-connect (display)
- "Connect to display DISPLAY for the Emacs talk group."
- (interactive "sTalk to display: ")
- ;; Make sure we have an entry for the current display.
- (let ((mydisp (cdr (assq 'display (frame-parameters (selected-frame))))))
- (talk-add-display mydisp))
- ;; Make sure we have an entry for the specified display.
- (talk-add-display display)
- ;; Add the new buffers to all talk frames.
- (talk-update-buffers))
-
- (defun talk-add-display (display)
- (let* ((elt (assoc display talk-display-alist))
- (name (concat "*talk-" display "*"))
- buffer frame)
- (if (not (and elt (frame-live-p (setq frame (nth 1 elt)))))
- (setq frame (make-frame-on-display display (list (cons 'name name)))))
- (if (not (and elt (buffer-name (get-buffer (setq buffer (nth 2 elt))))))
- (setq buffer (get-buffer-create name)))
- (setq talk-display-alist
- (cons (list display frame buffer) (delq elt talk-display-alist)))))
-
- (defun talk-disconnect ()
- "Disconnect this display from the Emacs talk group."
- (interactive)
- (let* ((mydisp (cdr (assq 'display (frame-parameters (selected-frame)))))
- (elt (assoc mydisp talk-display-alist)))
- (delete-frame (nth 1 elt))
- (kill-buffer (nth 2 elt))
- (setq talk-display-alist (delq elt talk-display-alist))
- (talk-update-buffers)))
-
- (defun talk-update-buffers ()
- "Update all the talk frames so that each shows all the talk buffers."
- (let ((tail talk-display-alist))
- (while tail
- (let ((frame (nth 1 (car tail)))
- (this-buffer (nth 2 (car tail)))
- (buffers
- (mapcar (function (lambda (elt) (nth 2 elt)))
- talk-display-alist)))
- ;; Put this display's own talk buffer
- ;; at the front of the list.
- (setq buffers (cons this-buffer (delq this-buffer buffers)))
- (talk-split-up-frame frame buffers))
- (setq tail (cdr tail)))))
-
- (defun talk-split-up-frame (frame buffers)
- "Split FRAME into equal-sized windows displaying the buffers in BUFFERS.
- Select the first of these windows, displaying the first of the buffers."
- (let ((lines-per-buffer (/ (frame-height frame) (length buffers)))
- (old-frame (selected-frame)))
- (unwind-protect
- (progn
- (select-frame frame)
- (select-window (frame-first-window frame))
- (delete-other-windows)
- (while (progn
- (switch-to-buffer (car buffers))
- (setq buffers (cdr buffers)))
- (split-window-vertically lines-per-buffer)
- (other-window 1))
- (select-window (frame-first-window frame)))
- (select-frame old-frame))))
-
- ;;; talk.el ends here
-