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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the $MODULE$ of the Qt Toolkit.
**
** $TROLLTECH_DUAL_LICENSE$
**
****************************************************************************/
#ifndef QMLBASICSCRIPT_P_H
#define QMLBASICSCRIPT_P_H
#include <QtCore/QList>
#include <QtCore/QByteArray>
#include <QtCore/QVariant>
#include <private/qmlparser_p.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
class QmlRefCount;
class QmlContext;
class QmlBasicScriptPrivate;
class QmlBasicScriptNodeCache;
class QmlBasicScript
{
public:
QmlBasicScript();
QmlBasicScript(const char *, QmlRefCount * = 0);
~QmlBasicScript();
// Always 4-byte aligned
const char *compileData() const;
unsigned int compileDataSize() const;
QByteArray expression() const;
struct Expression
{
QmlParser::Object *component;
QmlParser::Object *context;
QmlParser::Property *property;
QmlParser::Variant expression;
QHash<QString, QPair<QmlParser::Object *, int> > ids;
};
bool compile(const Expression &);
bool isValid() const;
void clear();
void dump();
void *newScriptState();
void deleteScriptState(void *);
enum CacheState { NoChange, Incremental, Reset };
QVariant run(QmlContext *, void *, CacheState *);
// Optimization opportunities
bool isSingleLoad() const;
QByteArray singleLoadTarget() const;
private:
int flags;
QmlBasicScriptPrivate *d;
QmlRefCount *rc;
void clearCache(void *);
void guard(QmlBasicScriptNodeCache &);
bool valid(QmlBasicScriptNodeCache &, QObject *);
};
class QmlContextPrivate;
class QDebug;
class QmlBasicScriptNodeCache
{
public:
QObject *object;
const QMetaObject *metaObject;
enum { Invalid,
Core,
Attached,
Signal,
SignalProperty,
Variant
} type;
union {
int core;
QObject *attached;
QmlContextPrivate *context;
};
int coreType;
int contextIndex;
bool isValid() const { return type != Invalid; }
bool isCore() const { return type == Core; }
bool isVariant() const { return type == Variant; }
void clear();
QVariant value(const char *) const;
};
QDebug operator<<(QDebug, const QmlBasicScriptNodeCache &);
QT_END_NAMESPACE
QT_END_HEADER
#endif // QMLBASICSCRIPT_P_H
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