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Diffstat (limited to 'engines/pegasus/notification.cpp')
-rw-r--r-- | engines/pegasus/notification.cpp | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/engines/pegasus/notification.cpp b/engines/pegasus/notification.cpp new file mode 100644 index 0000000000..4179afa70d --- /dev/null +++ b/engines/pegasus/notification.cpp @@ -0,0 +1,149 @@ +/* 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 ReceiverList::iterator ReceiverIterator; + +Notification::Notification(const NotificationID id, NotificationManager *owner) : IDObject(id) { + _owner = owner; + _currentFlags = kNoNotificationFlags; + if (_owner) + _owner->addNotification(this); +} + +Notification::~Notification() { + for (uint i = 0; i < _receivers.size(); i++) + _receivers[i].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, NotificationFlags flags, NotificationFlags mask) { + for (uint i = 0; i < _receivers.size(); i++) { + if (_receivers[i].receiver == receiver) { + _receivers[i].mask = (_receivers[i].mask & ~mask) | (flags & mask); + receiver->newNotification(this); + return; + } + } + + ReceiverEntry newEntry; + newEntry.receiver = receiver; + newEntry.mask = flags; + _receivers.push_back(newEntry); + + receiver->newNotification(this); +} + +void Notification::cancelNotification(NotificationReceiver *receiver) { + for (uint i = 0; i < _receivers.size(); i++) { + if (_receivers[i].receiver == receiver) { + _receivers.remove_at(i); + i--; + } + } +} + +void Notification::setNotificationFlags(NotificationFlags flags, NotificationFlags mask) { + _currentFlags = (_currentFlags & ~mask) | flags; +} + +void Notification::checkReceivers() { + NotificationFlags currentFlags = _currentFlags; + _currentFlags = kNoNotificationFlags; + + for (uint i = 0; i < _receivers.size(); i++) + if (_receivers[i].mask & currentFlags) + _receivers[i].receiver->receiveNotification(this, currentFlags); +} + +// Receiver entries are equal if their receivers are equal. + +int operator==(const ReceiverEntry &entry1, const ReceiverEntry &entry2) { + return entry1.receiver == entry2.receiver; +} + +int operator!=(const ReceiverEntry &entry1, const ReceiverEntry &entry2) { + return entry1.receiver != entry2.receiver; +} + +NotificationReceiver::NotificationReceiver() { + _notification = NULL; +} + +NotificationReceiver::~NotificationReceiver() { + if (_notification) + _notification->cancelNotification(this); +} + +void NotificationReceiver::receiveNotification(Notification *, const NotificationFlags) { +} + +void NotificationReceiver::newNotification(Notification *notification) { + _notification = notification; +} + +typedef NotificationList::iterator NotificationIterator; + +NotificationManager::NotificationManager() { +} + +NotificationManager::~NotificationManager() { + detachNotifications(); +} + +void NotificationManager::addNotification(Notification *notification) { + _notifications.push_back(notification); +} + +void NotificationManager::removeNotification(Notification *notification) { + for (NotificationIterator it = _notifications.begin(); it != _notifications.end();) { + if ((*it) == notification) + it = _notifications.erase(it); + else + it++; + } +} + +void NotificationManager::detachNotifications() { + for (NotificationIterator it = _notifications.begin(); it != _notifications.end(); it++) + (*it)->_owner = 0; +} + +void NotificationManager::checkNotifications() { + for (NotificationIterator it = _notifications.begin(); it != _notifications.end(); it++) + if ((*it)->_currentFlags != kNoNotificationFlags) + (*it)->checkReceivers(); +} + +} // End of namespace Pegasus |