Unify binding optimizer and QtScript binding signal management logic

1 files changed, 272 insertions, 0 deletions

diff --git a/src/declarative/qml/qdeclarativenotifier_p.h b/src/declarative/qml/qdeclarativenotifier_p.h
new file mode 100644
index 0000000..a0e6b43
--- /dev/null
+++ b/src/declarative/qml/qdeclarativenotifier_p.h
@@ -0,0 +1,272 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, 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.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QDECLARATIVENOTIFIER_P_H
+#define QDECLARATIVENOTIFIER_P_H
+
+#include "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 *);
+
+    inline 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;
+        Notifier **disconnected;
+
+        QDeclarativeNotifierEndpoint  *next;
+        QDeclarativeNotifierEndpoint **prev;
+    };
+
+    enum { InvalidType, SignalType, NotifierType } type;
+    union {
+        char signalData[sizeof(Signal)];
+        char notifierData[sizeof(Notifier)];
+    };
+
+    inline Notifier *toNotifier();
+    inline Notifier *asNotifier();
+    inline Signal *toSignal();
+    inline Signal *asSignal();
+};
+
+QDeclarativeNotifier::QDeclarativeNotifier()
+: endpoints(0)
+{
+    QDeclarativeNotifierEndpoint *endpoint = endpoints;
+    while (endpoint) {
+        QDeclarativeNotifierEndpoint *next = endpoint->asNotifier()->next;
+        endpoint->asNotifier()->next = 0;
+        endpoint->asNotifier()->prev = 0;
+        endpoint->asNotifier()->notifier = 0;
+        endpoint = next;
+    }
+}
+
+QDeclarativeNotifier::~QDeclarativeNotifier()
+{    
+}
+
+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(QObject *source, int sourceSignal)
+{
+    Signal *s = toSignal();
+    
+    if (s->source == source && s->sourceSignal == sourceSignal)
+        return;
+
+    disconnect();
+
+    QMetaObject::connect(source, sourceSignal, target, targetMethod);
+
+    s->source = source;
+    s->sourceSignal = sourceSignal;
+}
+
+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 = (Signal *)&signalData;
+        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();
+    }
+
+    Notifier *n = asNotifier();
+    n->next = 0;
+    n->prev = 0;
+    n->disconnected = 0;
+    n->notifier = 0;
+    type = NotifierType;
+    return n;
+}
+
+QDeclarativeNotifierEndpoint::Notifier *QDeclarativeNotifierEndpoint::asNotifier() 
+{ 
+    return (Notifier *)(&notifierData); 
+}
+
+QDeclarativeNotifierEndpoint::Signal *QDeclarativeNotifierEndpoint::toSignal()
+{
+    if (SignalType == type) 
+        return asSignal();
+
+    disconnect();
+    Signal *s = asSignal();
+    new (s) Signal;
+    type = SignalType;
+
+    return s;
+}
+
+QDeclarativeNotifierEndpoint::Signal *QDeclarativeNotifierEndpoint::asSignal() 
+{ 
+    return (Signal *)(&signalData); 
+}
+
+QT_END_NAMESPACE
+
+#endif // QDECLARATIVENOTIFIER_P_H
+