+++ /dev/null
-;;; riece-signal.el --- "signal-slot" abstraction for routing display events
-;; Copyright (C) 1998-2003 Daiki Ueno
-
-;; Author: Daiki Ueno <ueno@unixuser.org>
-;; Created: 1998-09-28
-;; Keywords: IRC, riece
-
-;; This file is part of Riece.
-
-;; This program 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 program 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., 51 Franklin Street, Fifth Floor,
-;; Boston, MA 02110-1301, USA.
-
-;;; Commentary:
-
-;;; This module implements Qt like "signal-slot" abstraction for
-;;; routing display events.
-
-;;; Code:
-
-(require 'riece-options)
-(require 'riece-debug)
-
-(defvar riece-signal-slot-obarray
- (make-vector 31 0))
-
-(defun riece-make-slot (function &optional filter handback)
- "Make an instance of slot object.
-Arguments are corresponding to callback function, filter function, and
-a handback object, respectively.
-This function is for internal use only."
- (vector function filter handback))
-
-(defun riece-slot-function (slot)
- "Return the callback function of SLOT.
-This function is for internal use only."
- (aref slot 0))
-
-(defun riece-slot-filter (slot)
- "Return the filter function of SLOT.
-This function is for internal use only."
- (aref slot 1))
-
-(defun riece-slot-handback (slot)
- "Return the handback object of SLOT.
-This function is for internal use only."
- (aref slot 2))
-
-(defun riece-make-signal (name args)
- "Make an instance of signal object.
-The 1st arguments is the name of the signal and the rest of arguments
-are the data of the signal.
-This function is for internal use only."
- (vector name args))
-
-(defun riece-signal-name (signal)
- "Return the name of SIGNAL."
- (aref signal 0))
-
-(defun riece-signal-args (signal)
- "Return the data of SIGNAL."
- (aref signal 1))
-
-(defun riece-connect-signal (signal-name function &optional filter handback)
- "Add FUNCTION as a listener of a signal identified by SIGNAL-NAME."
- (let ((symbol (intern (symbol-name signal-name) riece-signal-slot-obarray)))
- (set symbol (cons (riece-make-slot function filter handback)
- (if (boundp symbol)
- (symbol-value symbol))))))
-
-(defun riece-disconnect-signal (signal-name function)
- "Remove FUNCTION from the listener of the signal identified by SIGNAL-NAME."
- (let* ((symbol (intern-soft (symbol-name signal-name)
- riece-signal-slot-obarray))
- (slots (symbol-value symbol)))
- (while slots
- (if (eq (riece-slot-function (car slots))
- function)
- (set symbol (delq (car slots) (symbol-value symbol))))
- (setq slots (cdr slots)))))
-
-(defun riece-clear-signal-slots ()
- "Remove all functions from listeners list."
- (fillarray riece-signal-slot-obarray 0))
-
-(defun riece-emit-signal (signal-name &rest args)
- "Emit SIGNAL."
- (let ((symbol (intern-soft (symbol-name signal-name)
- riece-signal-slot-obarray))
- signal
- slots)
- (when symbol
- (setq signal (riece-make-signal signal-name args)
- slots (symbol-value symbol))
- (while slots
- (if (or (null (riece-slot-filter (car slots)))
- (riece-funcall-ignore-errors (format "signal filter for \"%S\""
- signal-name)
- (riece-slot-filter (car slots))
- signal))
- (riece-funcall-ignore-errors (format "slot function for \"%S\""
- signal-name)
- (riece-slot-function (car slots))
- signal
- (riece-slot-handback (car slots))))
- (setq slots (cdr slots))))))
-
-(provide 'riece-signal)
-
-;;; riece-signal.el ends here
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