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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights. These rights are described in the Digia 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QV4BINDINGS_P_H
#define QV4BINDINGS_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "private/qqmlexpression_p.h"
#include "private/qqmlbinding_p.h"
#include "private/qqmlinstruction_p.h"
#include "private/qv4instruction_p.h"
#include "private/qpointervaluepair_p.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
struct QV4Program;
class QV4Bindings : public QQmlAbstractExpression,
public QQmlRefCount
{
Q_DECLARE_TR_FUNCTIONS(QV4Bindings)
public:
QV4Bindings(const char *program, QQmlContextData *context);
virtual ~QV4Bindings();
QQmlAbstractBinding *configBinding(QObject *target, QObject *scope,
const QQmlInstruction::instr_assignV4Binding *);
#ifdef QML_THREADED_INTERPRETER
static void **getDecodeInstrTable();
#endif
struct Binding : public QQmlAbstractBinding, public QQmlDelayedError {
Binding()
: QQmlAbstractBinding(V4), target(0), scope(0), instruction(0), executedBlocks(0), parent(0) {}
// Inherited from QQmlAbstractBinding
static void destroy(QQmlAbstractBinding *, QQmlAbstractBinding::DestroyMode mode);
static int propertyIndex(const QQmlAbstractBinding *);
static QObject *object(const QQmlAbstractBinding *);
static void setEnabled(QQmlAbstractBinding *, bool, QQmlPropertyPrivate::WriteFlags);
static void update(QQmlAbstractBinding *, QQmlPropertyPrivate::WriteFlags);
static void retargetBinding(QQmlAbstractBinding *, QObject *, int);
void disconnect();
void dump();
struct Retarget {
QObject *target;
int targetProperty;
};
QPointerValuePair<QObject, Retarget> target;
QObject *scope;
// To save memory, we store flags inside the instruction pointer.
// instruction.flag1: enabled
// instruction.flag2: updating
QFlagPointer<const QQmlInstruction::instr_assignV4Binding> instruction;
quint32 executedBlocks;
QV4Bindings *parent;
inline bool enabledFlag() const { return instruction.flag(); }
inline void setEnabledFlag(bool v) { instruction.setFlagValue(v); }
inline bool updatingFlag() const { return instruction.flag2(); }
inline void setUpdatingFlag(bool v) { instruction.setFlag2Value(v); }
};
private:
Q_DISABLE_COPY(QV4Bindings)
class Subscription : public QQmlNotifierEndpoint
{
public:
inline Subscription();
// Index of this Subscription into the QV4Bindings::subscriptions array.
// This may not be used before setBindings() was called.
inline int method() const;
inline void setBindings(QV4Bindings *bindings);
inline QV4Bindings *bindings() const;
inline bool active() const;
inline void setActive(bool active);
// Pointer to the parent QV4Bindings. The flag is used as the 'active' value.
QFlagPointer<QV4Bindings> m_bindings;
};
friend void QV4BindingsSubscription_callback(QQmlNotifierEndpoint *e, void **);
Subscription *subscriptions;
void subscriptionNotify(int);
void run(Binding *, QQmlPropertyPrivate::WriteFlags flags);
QV4Program *program;
Binding *bindings;
void init();
void run(int instr, quint32 &executedBlocks, QQmlContextData *context,
QQmlDelayedError *error, QObject *scope, QObject *output,
QQmlPropertyPrivate::WriteFlags storeFlags,
bool *invalidated
#ifdef QML_THREADED_INTERPRETER
, void ***decode_instr = 0
#endif
);
inline void subscribeId(QQmlContextData *p, int idIndex, int subIndex);
inline void subscribe(QObject *o, int notifyIndex, int subIndex, QQmlEngine *);
inline static qint32 toInt32(double n);
static const double D32;
static quint32 toUint32(double n);
};
QT_END_NAMESPACE
QT_END_HEADER
#endif // QV4BINDINGS_P_H
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