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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 233 insertions, 0 deletions

diff --git a/src/declarative/qml/qdeclarativeexpression_p.h b/src/declarative/qml/qdeclarativeexpression_p.h
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+/****************************************************************************
+**
+** 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