| /**************************************************************************** |
| ** |
| ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). |
| ** All rights reserved. |
| ** Contact: Nokia Corporation (qt-info@nokia.com) |
| ** |
| ** This file is part of the QtDeclarative module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
| ** GNU Lesser General Public License Usage |
| ** 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, Nokia gives you certain additional |
| ** rights. These rights are described in the Nokia 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. |
| ** |
| ** Other Usage |
| ** Alternatively, this file may be used in accordance with the terms and |
| ** conditions contained in a signed written agreement between you and Nokia. |
| ** |
| ** |
| ** |
| ** |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #ifndef QDECLARATIVEEXPRESSION_P_H |
| #define QDECLARATIVEEXPRESSION_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 "qdeclarativeexpression.h" |
| |
| #include "private/qdeclarativeengine_p.h" |
| #include "private/qdeclarativeguard_p.h" |
| |
| #include <QtScript/qscriptvalue.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QDeclarativeAbstractExpression |
| { |
| public: |
| QDeclarativeAbstractExpression(); |
| virtual ~QDeclarativeAbstractExpression(); |
| |
| bool isValid() const; |
| |
| QDeclarativeContextData *context() const; |
| void setContext(QDeclarativeContextData *); |
| |
| virtual void refresh(); |
| |
| private: |
| friend class QDeclarativeContext; |
| friend class QDeclarativeContextData; |
| friend class QDeclarativeContextPrivate; |
| QDeclarativeContextData *m_context; |
| QDeclarativeAbstractExpression **m_prevExpression; |
| QDeclarativeAbstractExpression *m_nextExpression; |
| }; |
| |
| class QDeclarativeDelayedError |
| { |
| public: |
| inline QDeclarativeDelayedError() : nextError(0), prevError(0) {} |
| inline ~QDeclarativeDelayedError() { removeError(); } |
| |
| QDeclarativeError error; |
| |
| bool addError(QDeclarativeEnginePrivate *); |
| |
| inline void removeError() { |
| if (!prevError) return; |
| if (nextError) nextError->prevError = prevError; |
| *prevError = nextError; |
| nextError = 0; |
| prevError = 0; |
| } |
| |
| private: |
| QDeclarativeDelayedError *nextError; |
| QDeclarativeDelayedError **prevError; |
| }; |
| |
| class QDeclarativeQtScriptExpression : public QDeclarativeAbstractExpression, |
| public QDeclarativeDelayedError |
| { |
| public: |
| enum Mode { SharedContext, ExplicitContext }; |
| |
| enum EvaluateFlag { RequiresThisObject = 0x01 }; |
| Q_DECLARE_FLAGS(EvaluateFlags, EvaluateFlag) |
| |
| QDeclarativeQtScriptExpression(); |
| virtual ~QDeclarativeQtScriptExpression(); |
| |
| QDeclarativeRefCount *dataRef; |
| |
| QString expression; |
| |
| Mode expressionFunctionMode; |
| QScriptValue expressionFunction; |
| |
| QScriptValue expressionContext; // Only used in ExplicitContext |
| QObject *scopeObject; // Only used in SharedContext |
| |
| bool notifyOnValueChange() const; |
| void setNotifyOnValueChange(bool); |
| void resetNotifyOnChange(); |
| void setNotifyObject(QObject *, int ); |
| |
| void setEvaluateFlags(EvaluateFlags flags); |
| EvaluateFlags evaluateFlags() const; |
| |
| QScriptValue scriptValue(QObject *secondaryScope, bool *isUndefined); |
| |
| class DeleteWatcher { |
| public: |
| inline DeleteWatcher(QDeclarativeQtScriptExpression *data); |
| inline ~DeleteWatcher(); |
| inline bool wasDeleted() const; |
| private: |
| bool *m_wasDeleted; |
| bool m_wasDeletedStorage; |
| QDeclarativeQtScriptExpression *m_d; |
| }; |
| |
| private: |
| void clearGuards(); |
| QScriptValue eval(QObject *secondaryScope, bool *isUndefined); |
| void updateGuards(const QPODVector<QDeclarativeEnginePrivate::CapturedProperty> &properties); |
| |
| bool trackChange; |
| |
| QDeclarativeNotifierEndpoint *guardList; |
| int guardListLength; |
| |
| QObject *guardObject; |
| int guardObjectNotifyIndex; |
| bool *deleted; |
| |
| EvaluateFlags evalFlags; |
| }; |
| |
| Q_DECLARE_OPERATORS_FOR_FLAGS(QDeclarativeQtScriptExpression::EvaluateFlags) |
| |
| |
| class QDeclarativeExpression; |
| class QString; |
| class QDeclarativeExpressionPrivate : public QObjectPrivate, public QDeclarativeQtScriptExpression |
| { |
| Q_DECLARE_PUBLIC(QDeclarativeExpression) |
| public: |
| QDeclarativeExpressionPrivate(); |
| ~QDeclarativeExpressionPrivate(); |
| |
| void init(QDeclarativeContextData *, const QString &, QObject *); |
| void init(QDeclarativeContextData *, const QScriptValue &, QObject *); |
| void init(QDeclarativeContextData *, void *, QDeclarativeRefCount *, QObject *, const QString &, int); |
| |
| QVariant value(QObject *secondaryScope = 0, bool *isUndefined = 0); |
| QScriptValue scriptValue(QObject *secondaryScope = 0, bool *isUndefined = 0); |
| |
| static QDeclarativeExpressionPrivate *get(QDeclarativeExpression *expr) { |
| return static_cast<QDeclarativeExpressionPrivate *>(QObjectPrivate::get(expr)); |
| } |
| static QDeclarativeExpression *get(QDeclarativeExpressionPrivate *expr) { |
| return expr->q_func(); |
| } |
| |
| void _q_notify(); |
| virtual void emitValueChanged(); |
| |
| static void exceptionToError(QScriptEngine *, QDeclarativeError &); |
| static QScriptValue evalInObjectScope(QDeclarativeContextData *, QObject *, const QString &, const QString &, |
| int, QScriptValue *); |
| static QScriptValue evalInObjectScope(QDeclarativeContextData *, QObject *, const QScriptProgram &, |
| QScriptValue *); |
| |
| bool expressionFunctionValid:1; |
| |
| QString url; // This is a QString for a reason. QUrls are slooooooow... |
| int line; |
| QByteArray name; //function name, hint for the debugger |
| }; |
| |
| QDeclarativeQtScriptExpression::DeleteWatcher::DeleteWatcher(QDeclarativeQtScriptExpression *data) |
| : m_wasDeletedStorage(false), m_d(data) |
| { |
| if (!m_d->deleted) |
| m_d->deleted = &m_wasDeletedStorage; |
| m_wasDeleted = m_d->deleted; |
| } |
| |
| QDeclarativeQtScriptExpression::DeleteWatcher::~DeleteWatcher() |
| { |
| if (false == *m_wasDeleted && m_wasDeleted == m_d->deleted) |
| m_d->deleted = 0; |
| } |
| |
| bool QDeclarativeQtScriptExpression::DeleteWatcher::wasDeleted() const |
| { |
| return *m_wasDeleted; |
| } |
| |
| QT_END_NAMESPACE |
| |
| #endif // QDECLARATIVEEXPRESSION_P_H |