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Diffstat (limited to 'src/declarative/qml/qmlexpression_p.h')
| -rw-r--r-- | src/declarative/qml/qmlexpression_p.h | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/src/declarative/qml/qmlexpression_p.h b/src/declarative/qml/qmlexpression_p.h new file mode 100644 index 0000000..b19c60c --- /dev/null +++ b/src/declarative/qml/qmlexpression_p.h @@ -0,0 +1,187 @@ +/**************************************************************************** +** +** Copyright (C) 2009 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 QMLEXPRESSION_P_H +#define QMLEXPRESSION_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 "qmlexpression.h" + +#include "qmlengine_p.h" +#include "qmlguard_p.h" + +#include <QtScript/qscriptvalue.h> + +QT_BEGIN_NAMESPACE + +class QmlAbstractExpression +{ +public: + QmlAbstractExpression(); + virtual ~QmlAbstractExpression(); + + bool isValid() const; + + QmlContext *context() const; + void setContext(QmlContext *); + + virtual void refresh(); + +private: + friend class QmlContext; + friend class QmlContextPrivate; + QmlContext *m_context; + QmlAbstractExpression **m_prevExpression; + QmlAbstractExpression *m_nextExpression; +}; + +class QmlDelayedError +{ +public: + inline QmlDelayedError() : nextError(0), prevError(0) {} + inline ~QmlDelayedError() { removeError(); } + + QmlError error; + + bool addError(QmlEnginePrivate *); + + inline void removeError() { + if (!prevError) return; + if (nextError) nextError->prevError = prevError; + *prevError = nextError; + nextError = 0; + prevError = 0; + } + +private: + QmlDelayedError *nextError; + QmlDelayedError **prevError; +}; + +class QmlExpressionData : public QmlAbstractExpression, public QmlDelayedError, public QmlRefCount +{ +public: + QmlExpressionData(); + virtual ~QmlExpressionData(); + + QmlExpressionPrivate *q; + + QmlRefCount *dataRef; + QString expression; + bool expressionFunctionValid:1; + bool expressionRewritten:1; + QScriptValue expressionFunction; + + QObject *me; + bool trackChange; + + bool isShared; + + QString url; // This is a QString for a reason. QUrls are slooooooow... + int line; + + struct SignalGuard : public QmlGuard<QObject> { + SignalGuard() : isDuplicate(false), notifyIndex(-1) {} + + SignalGuard &operator=(QObject *obj) { + QmlGuard<QObject>::operator=(obj); + return *this; + } + SignalGuard &operator=(const SignalGuard &o) { + QmlGuard<QObject>::operator=(o); + isDuplicate = o.isDuplicate; + notifyIndex = o.notifyIndex; + return *this; + } + + bool isDuplicate:1; + int notifyIndex:31; + }; + SignalGuard *guardList; + int guardListLength; +}; + +class QmlExpression; +class QString; +class QmlExpressionPrivate : public QObjectPrivate +{ + Q_DECLARE_PUBLIC(QmlExpression) +public: + QmlExpressionPrivate(); + QmlExpressionPrivate(QmlExpressionData *); + ~QmlExpressionPrivate(); + + void init(QmlContext *, const QString &, QObject *); + void init(QmlContext *, void *, QmlRefCount *, QObject *, const QString &, int); + + QmlExpressionData *data; + + QVariant value(QObject *secondaryScope = 0, bool *isUndefined = 0); + QVariant evalQtScript(QObject *secondaryScope, bool *isUndefined = 0); + + void updateGuards(const QPODVector<QmlEnginePrivate::CapturedProperty> &properties); + void clearGuards(); + + static QmlExpressionPrivate *get(QmlExpression *expr) { + return static_cast<QmlExpressionPrivate *>(QObjectPrivate::get(expr)); + } + static QmlExpression *get(QmlExpressionPrivate *expr) { + return expr->q_func(); + } + + static void exceptionToError(QScriptEngine *, QmlError &); + static QScriptValue evalInObjectScope(QmlContext *, QObject *, const QString &); + static QScriptValue evalInObjectScope(QmlContext *, QObject *, const QScriptProgram &); +}; + +QT_END_NAMESPACE + +#endif // QMLEXPRESSION_P_H |