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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QDECLARATIVENOTIFIER_P_H
+#define QDECLARATIVENOTIFIER_P_H
+
+#include "private/qdeclarativeguard_p.h"
+
+QT_BEGIN_NAMESPACE
+
+class QDeclarativeNotifierEndpoint;
+class QDeclarativeNotifier
+{
+public:
+ inline QDeclarativeNotifier();
+ inline ~QDeclarativeNotifier();
+ inline void notify();
+
+private:
+ friend class QDeclarativeNotifierEndpoint;
+
+ static void emitNotify(QDeclarativeNotifierEndpoint *);
+ QDeclarativeNotifierEndpoint *endpoints;
+};
+
+class QDeclarativeNotifierEndpoint
+{
+public:
+ inline QDeclarativeNotifierEndpoint();
+ inline QDeclarativeNotifierEndpoint(QObject *t, int m);
+ inline ~QDeclarativeNotifierEndpoint();
+
+ QObject *target;
+ int targetMethod;
+
+ inline bool isConnected();
+ inline bool isConnected(QObject *source, int sourceSignal);
+ inline bool isConnected(QDeclarativeNotifier *);
+
+ void connect(QObject *source, int sourceSignal);
+ inline void connect(QDeclarativeNotifier *);
+ inline void disconnect();
+
+ void copyAndClear(QDeclarativeNotifierEndpoint &other);
+
+private:
+ friend class QDeclarativeNotifier;
+
+ struct Signal {
+ QDeclarativeGuard<QObject> source;
+ int sourceSignal;
+ };
+
+ struct Notifier {
+ QDeclarativeNotifier *notifier;
+ QDeclarativeNotifierEndpoint **disconnected;
+
+ QDeclarativeNotifierEndpoint *next;
+ QDeclarativeNotifierEndpoint **prev;
+ };
+
+ enum { InvalidType, SignalType, NotifierType } type;
+ union {
+ struct {
+ Signal *signal;
+ union {
+ char signalData[sizeof(Signal)];
+ qint64 q_for_alignment_1;
+ double q_for_alignment_2;
+ };
+ } signal;
+ Notifier notifier;
+ };
+
+ inline Notifier *toNotifier();
+ inline Notifier *asNotifier();
+ inline Signal *toSignal();
+ inline Signal *asSignal();
+};
+
+QDeclarativeNotifier::QDeclarativeNotifier()
+: endpoints(0)
+{
+}
+
+QDeclarativeNotifier::~QDeclarativeNotifier()
+{
+ QDeclarativeNotifierEndpoint *endpoint = endpoints;
+ while (endpoint) {
+ QDeclarativeNotifierEndpoint::Notifier *n = endpoint->asNotifier();
+ endpoint = n->next;
+
+ n->next = 0;
+ n->prev = 0;
+ n->notifier = 0;
+ if (n->disconnected) *n->disconnected = 0;
+ n->disconnected = 0;
+ }
+ endpoints = 0;
+}
+
+void QDeclarativeNotifier::notify()
+{
+ if (endpoints) emitNotify(endpoints);
+}
+
+QDeclarativeNotifierEndpoint::QDeclarativeNotifierEndpoint()
+: target(0), targetMethod(0), type(InvalidType)
+{
+}
+
+QDeclarativeNotifierEndpoint::QDeclarativeNotifierEndpoint(QObject *t, int m)
+: target(t), targetMethod(m), type(InvalidType)
+{
+}
+
+QDeclarativeNotifierEndpoint::~QDeclarativeNotifierEndpoint()
+{
+ disconnect();
+ if (SignalType == type) {
+ Signal *s = asSignal();
+ s->~Signal();
+ }
+}
+
+bool QDeclarativeNotifierEndpoint::isConnected()
+{
+ if (SignalType == type) {
+ return asSignal()->source;
+ } else if (NotifierType == type) {
+ return asNotifier()->notifier;
+ } else {
+ return false;
+ }
+}
+
+bool QDeclarativeNotifierEndpoint::isConnected(QObject *source, int sourceSignal)
+{
+ return SignalType == type && asSignal()->source == source && asSignal()->sourceSignal == sourceSignal;
+}
+
+bool QDeclarativeNotifierEndpoint::isConnected(QDeclarativeNotifier *notifier)
+{
+ return NotifierType == type && asNotifier()->notifier == notifier;
+}
+
+void QDeclarativeNotifierEndpoint::connect(QDeclarativeNotifier *notifier)
+{
+ Notifier *n = toNotifier();
+
+ if (n->notifier == notifier)
+ return;
+
+ disconnect();
+
+ n->next = notifier->endpoints;
+ if (n->next) { n->next->asNotifier()->prev = &n->next; }
+ notifier->endpoints = this;
+ n->prev = &notifier->endpoints;
+ n->notifier = notifier;
+}
+
+void QDeclarativeNotifierEndpoint::disconnect()
+{
+ if (type == SignalType) {
+ Signal *s = asSignal();
+ if (s->source) {
+ QMetaObject::disconnectOne(s->source, s->sourceSignal, target, targetMethod);
+ s->source = 0;
+ }
+ } else if (type == NotifierType) {
+ Notifier *n = asNotifier();
+
+ if (n->next) n->next->asNotifier()->prev = n->prev;
+ if (n->prev) *n->prev = n->next;
+ if (n->disconnected) *n->disconnected = 0;
+ n->next = 0;
+ n->prev = 0;
+ n->disconnected = 0;
+ n->notifier = 0;
+ }
+}
+
+QDeclarativeNotifierEndpoint::Notifier *QDeclarativeNotifierEndpoint::toNotifier()
+{
+ if (NotifierType == type)
+ return asNotifier();
+
+ if (SignalType == type) {
+ disconnect();
+ Signal *s = asSignal();
+ s->~Signal();
+ }
+
+ type = NotifierType;
+ Notifier *n = asNotifier();
+ n->next = 0;
+ n->prev = 0;
+ n->disconnected = 0;
+ n->notifier = 0;
+ return n;
+}
+
+QDeclarativeNotifierEndpoint::Notifier *QDeclarativeNotifierEndpoint::asNotifier()
+{
+ Q_ASSERT(type == NotifierType);
+ return &notifier;
+}
+
+QDeclarativeNotifierEndpoint::Signal *QDeclarativeNotifierEndpoint::toSignal()
+{
+ if (SignalType == type)
+ return asSignal();
+
+ disconnect();
+ signal.signal = new (&signal.signalData) Signal;
+ type = SignalType;
+ return signal.signal;
+}
+
+QDeclarativeNotifierEndpoint::Signal *QDeclarativeNotifierEndpoint::asSignal()
+{
+ Q_ASSERT(type == SignalType);
+ return signal.signal;
+}
+
+QT_END_NAMESPACE
+
+#endif // QDECLARATIVENOTIFIER_P_H
+