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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QQMLBOUNDSIGNAL_P_H
#define QQMLBOUNDSIGNAL_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 <QtCore/qmetaobject.h>
#include <private/qqmljavascriptexpression_p.h>
#include <private/qqmlboundsignalexpressionpointer_p.h>
#include <private/qqmlnotifier_p.h>
#include <private/qflagpointer_p.h>
#include <private/qqmlrefcount_p.h>
#include <private/qqmlglobal_p.h>
#include <private/qbitfield_p.h>
QT_BEGIN_NAMESPACE
class Q_QML_PRIVATE_EXPORT QQmlBoundSignalExpression : public QQmlJavaScriptExpression, public QQmlRefCount
{
public:
QQmlBoundSignalExpression(QObject *target, int index,
QQmlContextData *ctxt, QObject *scope, const QString &expression,
const QString &fileName, quint16 line, quint16 column,
const QString &handlerName = QString(),
const QString ¶meterString = QString());
QQmlBoundSignalExpression(QObject *target, int index,
QQmlContextData *ctxt, QObject *scopeObject, QV4::Function *function,
QV4::ExecutionContext *scope = nullptr);
// inherited from QQmlJavaScriptExpression.
QString expressionIdentifier() const override;
void expressionChanged() override;
// evaluation of a bound signal expression doesn't return any value
void evaluate(void **a);
void evaluate(const QList<QVariant> &args);
QString expression() const;
QObject *target() const { return m_target; }
QQmlEngine *engine() const { return context() ? context()->engine : nullptr; }
private:
~QQmlBoundSignalExpression() override;
void init(QQmlContextData *ctxt, QObject *scope);
bool expressionFunctionValid() const { return function() != nullptr; }
int m_index;
QObject *m_target;
};
class Q_QML_PRIVATE_EXPORT QQmlBoundSignal : public QQmlNotifierEndpoint
{
public:
QQmlBoundSignal(QObject *target, int signal, QObject *owner, QQmlEngine *engine);
~QQmlBoundSignal();
void removeFromObject();
QQmlBoundSignalExpression *expression() const;
void takeExpression(QQmlBoundSignalExpression *);
void setEnabled(bool enabled);
private:
friend void QQmlBoundSignal_callback(QQmlNotifierEndpoint *, void **);
friend class QQmlPropertyPrivate;
friend class QQmlData;
friend class QQmlEngineDebugService;
void addToObject(QObject *owner);
QQmlBoundSignal **m_prevSignal;
QQmlBoundSignal *m_nextSignal;
bool m_enabled;
QQmlBoundSignalExpressionPointer m_expression;
};
QT_END_NAMESPACE
#endif // QQMLBOUNDSIGNAL_P_H
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