qv8bindings_p.h

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#ifndef QV8BINDINGS_P_H
#define QV8BINDINGS_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/qqmlpropertycache_p.h>
#include <private/qqmlinstruction_p.h>
#include <private/qqmlexpression_p.h>
#include <private/qqmlcompiler_p.h>
#include <private/qqmlbinding_p.h>
#include <private/qflagpointer_p.h>

QT_BEGIN_HEADER

QT_BEGIN_NAMESPACE

class QQmlCompiledData;

class QV8BindingsPrivate;
class QV8Bindings : public QQmlAbstractExpression
{
public:
    QV8Bindings(QQmlCompiledData::V8Program *,
                int line,
                QQmlContextData *context);
    virtual ~QV8Bindings();

    QQmlAbstractBinding *configBinding(QObject *target, QObject *scope,
                                               const QQmlInstruction::instr_assignBinding *);

    // Inherited from QQmlAbstractExpression
    virtual void refresh();

    struct Binding : public QQmlJavaScriptExpression,
                     public QQmlAbstractBinding {
        Binding();

        void update() { QQmlAbstractBinding::update(); }
        void refresh();

        // "Inherited" from QQmlJavaScriptExpression
        static QString expressionIdentifier(QQmlJavaScriptExpression *);
        static void expressionChanged(QQmlJavaScriptExpression *);

        // Inherited from QQmlAbstractBinding
        virtual void setEnabled(bool, QQmlPropertyPrivate::WriteFlags flags);
        virtual void update(QQmlPropertyPrivate::WriteFlags flags);
        virtual void destroy();
        virtual int propertyIndex() const;
        virtual QObject *object() const;

        QObject *target;
        QV8Bindings *parent;

        // To save memory, we store flags inside the instruction pointer.
        //    flag1: enabled
        //    flag2: updating
        QFlagPointer<const QQmlInstruction::instr_assignBinding> instruction;

        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); }
    };

    inline void addref();
    inline void release();

private:
    Q_DISABLE_COPY(QV8Bindings)

    const QUrl &url() const;
    const QString &urlString() const;
    v8::Persistent<v8::Array> &functions() const;

    QQmlCompiledData::V8Program *program;
    Binding *bindings;
    int refCount;
};

void QV8Bindings::addref()
{
    ++refCount;
}

void QV8Bindings::release()
{
    if (0 == --refCount)
        delete this;
}

QT_END_NAMESPACE

QT_END_HEADER

#endif // QV8BINDINGS_P_H