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Diffstat (limited to 'src/declarative/qml/qdeclarativeexpression_p.h')
| -rw-r--r-- | src/declarative/qml/qdeclarativeexpression_p.h | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/src/declarative/qml/qdeclarativeexpression_p.h b/src/declarative/qml/qdeclarativeexpression_p.h new file mode 100644 index 0000000000..51cae0f9d4 --- /dev/null +++ b/src/declarative/qml/qdeclarativeexpression_p.h @@ -0,0 +1,233 @@ +/**************************************************************************** +** +** 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. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** 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, 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. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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 |