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/****************************************************************************
**
** Copyright (C) 2013 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 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 QByteArray &expression,
bool isRewritten, const QString &fileName, quint16 line, quint16 column);
QQmlBoundSignalExpression(QObject *target, int index,
QQmlContextData *ctxt, QObject *scope, const QString &expression,
bool isRewritten, const QString &fileName, quint16 line, quint16 column);
// "inherited" from QQmlJavaScriptExpression.
static QString expressionIdentifier(QQmlJavaScriptExpression *);
static void expressionChanged(QQmlJavaScriptExpression *);
void setParameterCountForJS(int count) { m_parameterCountForJS = count; }
// evaluation of a bound signal expression doesn't return any value
void evaluate(void **a);
QString sourceFile() const { return m_fileName; }
quint16 lineNumber() const { return m_line; }
quint16 columnNumber() const { return m_column; }
QString expression() const;
QObject *target() const { return m_target; }
QQmlEngine *engine() const { return context() ? context()->engine : 0; }
private:
~QQmlBoundSignalExpression();
void init(QQmlContextData *ctxt, QObject *scope);
bool hasParameterInfo() const { return m_parameterCountForJS > 0; }
v8::Persistent<v8::Object> m_v8qmlscope;
v8::Persistent<v8::Function> m_v8function;
//either expressionUtf8 or expression will be used (but not both).
//once m_v8function is valid, we clear both expressions, and
//extract it from m_v8function if needed.
QByteArray m_expressionUtf8;
QString m_expression; //only used when expression needs to be rewritten
QString m_fileName;
quint16 m_line;
quint16 m_column;
int m_parameterCountForJS;
QObject *m_target;
int m_index;
bool m_expressionFunctionValid:1;
bool m_expressionFunctionRewritten:1;
bool m_invalidParameterName:1;
};
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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