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/****************************************************************************
**
** Copyright (C) 2014 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.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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/qqmlabstractexpression_p.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 QQmlAbstractExpression, 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 *scope, const QV4::ValueRef &function);
QQmlBoundSignalExpression(QObject *target, int index,
QQmlContextData *ctxt, QObject *scope, QV4::Function *runtimeFunction);
// "inherited" from QQmlJavaScriptExpression.
static QString expressionIdentifier(QQmlJavaScriptExpression *);
static void expressionChanged(QQmlJavaScriptExpression *);
// evaluation of a bound signal expression doesn't return any value
void evaluate(void **a);
QQmlSourceLocation sourceLocation() const;
QString expression() const;
QV4::Function *function() const;
QObject *target() const { return m_target; }
QQmlEngine *engine() const { return context() ? context()->engine : 0; }
private:
~QQmlBoundSignalExpression();
void init(QQmlContextData *ctxt, QObject *scope);
bool expressionFunctionValid() const { return m_extra.flag(); }
void setExpressionFunctionValid(bool v) { m_extra.setFlagValue(v); }
bool invalidParameterName() const { return m_extra.flag2(); }
void setInvalidParameterName(bool v) { m_extra.setFlag2Value(v); }
int m_index;
QV4::PersistentValue m_function;
QObject *m_target;
// only needed when !expressionFunctionValid()
struct ExtraData {
ExtraData(const QString &handlerName, const QString ¶meterString,
const QString &expression, const QString &fileName,
quint16 line, quint16 column);
QString m_handlerName;
QString m_parameterString;
QString m_expression;
QQmlSourceLocation m_sourceLocation;
QV4::PersistentValue m_v8qmlscope;
};
// We store some flag bits in the following flag pointers.
// flag - expressionFunctionValid
// flag2 - invalidParameterName
QFlagPointer<ExtraData> m_extra;
};
class Q_QML_PRIVATE_EXPORT QQmlAbstractBoundSignal
{
public:
QQmlAbstractBoundSignal();
virtual ~QQmlAbstractBoundSignal();
virtual int index() const = 0;
virtual QQmlBoundSignalExpression *expression() const = 0;
virtual QQmlBoundSignalExpressionPointer setExpression(QQmlBoundSignalExpression *) = 0;
virtual QQmlBoundSignalExpressionPointer takeExpression(QQmlBoundSignalExpression *) = 0;
virtual bool isEvaluating() const = 0;
void removeFromObject();
protected:
void addToObject(QObject *owner);
private:
friend class QQmlData;
friend class QQmlPropertyPrivate;
friend class QQmlEngineDebugService;
QQmlAbstractBoundSignal **m_prevSignal;
QQmlAbstractBoundSignal *m_nextSignal;
};
class Q_QML_PRIVATE_EXPORT QQmlBoundSignal : public QQmlAbstractBoundSignal,
public QQmlNotifierEndpoint
{
public:
QQmlBoundSignal(QObject *target, int signal, QObject *owner, QQmlEngine *engine);
virtual ~QQmlBoundSignal();
int index() const;
QQmlBoundSignalExpression *expression() const;
QQmlBoundSignalExpressionPointer setExpression(QQmlBoundSignalExpression *);
QQmlBoundSignalExpressionPointer takeExpression(QQmlBoundSignalExpression *);
bool isEvaluating() const { return m_isEvaluating; }
private:
friend void QQmlBoundSignal_callback(QQmlNotifierEndpoint *, void **);
QQmlBoundSignalExpressionPointer m_expression;
int m_index;
bool m_isEvaluating;
};
QT_END_NAMESPACE
#endif // QQMLBOUNDSIGNAL_P_H
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