1 files changed, 143 insertions, 0 deletions
diff --git a/engines/pegasus/notification.cpp b/engines/pegasus/notification.cpp
new file mode 100755
index 0000000000..f03e4705b7
--- /dev/null
+++ b/engines/pegasus/notification.cpp
@@ -0,0 +1,143 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * Additional copyright for this file:
+ * Copyright (C) 1995-1997 Presto Studios, Inc.
+ *
+ * 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
+ * of the License, 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "pegasus/constants.h"
+#include "pegasus/notification.h"
+
+namespace Pegasus {
+
+typedef tReceiverList::iterator tReceiverIterator;
+
+Notification::Notification(const tNotificationID id, NotificationManager *owner) : MMIDObject(id) {
+	_owner = owner;
+	_currentFlags = kNoNotificationFlags;
+	if (_owner)
+		_owner->addNotification(this);
+}
+
+Notification::~Notification() {
+	for (tReceiverIterator it = _receivers.begin(); it != _receivers.end(); it++)
+		it->receiver->newNotification(NULL);
+
+	if (_owner)
+		_owner->removeNotification(this);
+}
+
+//	Selectively set or clear notificiation bits.
+//	Wherever mask is 0, leave existing bits untouched.
+//	Wherever mask is 1, set bit equivalent to flags.
+void Notification::notifyMe(NotificationReceiver *receiver, tNotificationFlags flags, tNotificationFlags mask) {
+	for (tReceiverIterator it = _receivers.begin(); it != _receivers.end(); it++) {
+		if (it->receiver == receiver) {
+			it->mask = (it->mask & ~mask) | (flags & mask);
+			receiver->newNotification(this);
+			return;
+		}
+	}
+
+	tReceiverEntry newEntry;
+	newEntry.receiver = receiver;
+	newEntry.mask = flags;
+	_receivers.push_back(newEntry);
+
+	receiver->newNotification(this);
+}
+
+void Notification::cancelNotification(NotificationReceiver *receiver) {
+	for (tReceiverIterator it = _receivers.begin(); it != _receivers.end(); it++)
+		if (it->receiver == receiver)
+			_receivers.erase(it);
+}
+
+void Notification::setNotificationFlags(tNotificationFlags flags, tNotificationFlags mask) {
+	_currentFlags = (_currentFlags & ~mask) | flags;
+}
+
+void Notification::checkReceivers() {	
+	tNotificationFlags currentFlags = _currentFlags;
+	_currentFlags = kNoNotificationFlags;
+
+	for (tReceiverIterator it = _receivers.begin(); it != _receivers.end(); it++)
+		if (it->mask & currentFlags)
+			it->receiver->receiveNotification(this, currentFlags);
+}
+
+//	Receiver entries are equal if their receivers are equal.
+
+int operator==(const tReceiverEntry &entry1, const tReceiverEntry &entry2) {
+	return	entry1.receiver == entry2.receiver;
+}
+
+int operator!=(const tReceiverEntry &entry1, const tReceiverEntry &entry2) {
+	return	entry1.receiver != entry2.receiver;
+}
+
+NotificationReceiver::NotificationReceiver() {
+	_notification = NULL;
+}
+
+NotificationReceiver::~NotificationReceiver() {
+	if (_notification)
+		_notification->cancelNotification(this);
+}
+
+void NotificationReceiver::receiveNotification(Notification *, const tNotificationFlags) {
+}
+
+void NotificationReceiver::newNotification(Notification *notification) {
+	_notification = notification;
+}
+
+typedef tNotificationList::iterator tNotificationIterator;
+
+NotificationManager::NotificationManager() {
+}
+
+NotificationManager::~NotificationManager() {
+	detachNotifications();
+}
+
+void NotificationManager::addNotification(Notification *notification) {
+	_notifications.push_back(notification);
+}
+
+void NotificationManager::removeNotification(Notification *notification) {
+	for (tNotificationIterator it = _notifications.begin(); it != _notifications.end(); it++)
+		if ((*it) == notification)
+			_notifications.erase(it);
+}
+
+void NotificationManager::detachNotifications() {
+	for (tNotificationIterator it = _notifications.begin(); it != _notifications.end(); it++)
+		(*it)->_owner = 0;
+}
+
+void NotificationManager::checkNotifications() {
+	for (tNotificationIterator it = _notifications.begin(); it != _notifications.end(); it++)
+		if ((*it)->_currentFlags != kNoNotificationFlags)
+			(*it)->checkReceivers();
+}
+
+} // End of namespace Pegasus