mirror of
https://github.com/libretro/scummvm.git
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150 lines
4.4 KiB
C++
150 lines
4.4 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* Additional copyright for this file:
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* Copyright (C) 1995-1997 Presto Studios, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include "pegasus/constants.h"
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#include "pegasus/notification.h"
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namespace Pegasus {
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typedef ReceiverList::iterator ReceiverIterator;
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Notification::Notification(const NotificationID id, NotificationManager *owner) : IDObject(id) {
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_owner = owner;
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_currentFlags = kNoNotificationFlags;
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if (_owner)
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_owner->addNotification(this);
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}
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Notification::~Notification() {
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for (uint i = 0; i < _receivers.size(); i++)
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_receivers[i].receiver->newNotification(NULL);
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if (_owner)
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_owner->removeNotification(this);
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}
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// Selectively set or clear notificiation bits.
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// Wherever mask is 0, leave existing bits untouched.
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// Wherever mask is 1, set bit equivalent to flags.
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void Notification::notifyMe(NotificationReceiver *receiver, NotificationFlags flags, NotificationFlags mask) {
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for (uint i = 0; i < _receivers.size(); i++) {
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if (_receivers[i].receiver == receiver) {
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_receivers[i].mask = (_receivers[i].mask & ~mask) | (flags & mask);
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receiver->newNotification(this);
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return;
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}
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}
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ReceiverEntry newEntry;
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newEntry.receiver = receiver;
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newEntry.mask = flags;
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_receivers.push_back(newEntry);
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receiver->newNotification(this);
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}
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void Notification::cancelNotification(NotificationReceiver *receiver) {
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for (uint i = 0; i < _receivers.size(); i++) {
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if (_receivers[i].receiver == receiver) {
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_receivers.remove_at(i);
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i--;
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}
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}
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}
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void Notification::setNotificationFlags(NotificationFlags flags, NotificationFlags mask) {
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_currentFlags = (_currentFlags & ~mask) | flags;
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}
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void Notification::checkReceivers() {
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NotificationFlags currentFlags = _currentFlags;
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_currentFlags = kNoNotificationFlags;
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for (uint i = 0; i < _receivers.size(); i++)
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if (_receivers[i].mask & currentFlags)
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_receivers[i].receiver->receiveNotification(this, currentFlags);
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}
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// Receiver entries are equal if their receivers are equal.
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int operator==(const ReceiverEntry &entry1, const ReceiverEntry &entry2) {
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return entry1.receiver == entry2.receiver;
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}
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int operator!=(const ReceiverEntry &entry1, const ReceiverEntry &entry2) {
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return entry1.receiver != entry2.receiver;
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}
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NotificationReceiver::NotificationReceiver() {
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_notification = NULL;
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}
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NotificationReceiver::~NotificationReceiver() {
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if (_notification)
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_notification->cancelNotification(this);
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}
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void NotificationReceiver::receiveNotification(Notification *, const NotificationFlags) {
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}
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void NotificationReceiver::newNotification(Notification *notification) {
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_notification = notification;
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}
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typedef NotificationList::iterator NotificationIterator;
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NotificationManager::NotificationManager() {
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}
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NotificationManager::~NotificationManager() {
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detachNotifications();
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}
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void NotificationManager::addNotification(Notification *notification) {
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_notifications.push_back(notification);
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}
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void NotificationManager::removeNotification(Notification *notification) {
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for (NotificationIterator it = _notifications.begin(); it != _notifications.end();) {
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if ((*it) == notification)
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it = _notifications.erase(it);
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else
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it++;
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}
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}
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void NotificationManager::detachNotifications() {
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for (NotificationIterator it = _notifications.begin(); it != _notifications.end(); it++)
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(*it)->_owner = 0;
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}
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void NotificationManager::checkNotifications() {
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for (NotificationIterator it = _notifications.begin(); it != _notifications.end(); it++)
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if ((*it)->_currentFlags != kNoNotificationFlags)
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(*it)->checkReceivers();
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}
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} // End of namespace Pegasus
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