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    41 

    42 #ifndef QDECLARATIVEEXPRESSION_P_H

    43 #define QDECLARATIVEEXPRESSION_P_H

    44 

    45 //

    46 //  W A R N I N G

    47 //  -------------

    48 //

    49 // This file is not part of the Qt API.  It exists purely as an

    50 // implementation detail.  This header file may change from version to

    51 // version without notice, or even be removed.

    52 //

    53 // We mean it.

    54 //

    55 

    56 #include "qdeclarativeexpression.h"

    57 

    58 #include "private/qdeclarativeengine_p.h"

    59 #include "private/qdeclarativeguard_p.h"

    60 

    61 #include <QtScript/qscriptvalue.h>

    62 

    63 QT_BEGIN_NAMESPACE

    64 

    65 class QDeclarativeAbstractExpression

    66 {

    67 public:

    68     QDeclarativeAbstractExpression();

    69     virtual ~QDeclarativeAbstractExpression();

    70 

    71     bool isValid() const;

    72 

    73     QDeclarativeContextData *context() const;

    74     void setContext(QDeclarativeContextData *);

    75 

    76     virtual void refresh();

    77 

    78 private:

    79     friend class QDeclarativeContext;

    80     friend class QDeclarativeContextData;

    81     friend class QDeclarativeContextPrivate;

    82     QDeclarativeContextData *m_context;

    83     QDeclarativeAbstractExpression **m_prevExpression;

    84     QDeclarativeAbstractExpression  *m_nextExpression;

    85 };

    86 

    87 class QDeclarativeDelayedError 

    88 {

    89 public:

    90     inline QDeclarativeDelayedError() : nextError(0), prevError(0) {}

    91     inline ~QDeclarativeDelayedError() { removeError(); }

    92 

    93     QDeclarativeError error;

    94 

    95     bool addError(QDeclarativeEnginePrivate *);

    96 

    97     inline void removeError() {

    98         if (!prevError) return;

    99         if (nextError) nextError->prevError = prevError;

   100         *prevError = nextError;

   101         nextError = 0;

   102         prevError = 0;

   103     }

   104 

   105 private:

   106     QDeclarativeDelayedError  *nextError;

   107     QDeclarativeDelayedError **prevError;

   108 };

   109 

   110 class QDeclarativeExpressionData : public QDeclarativeAbstractExpression, public QDeclarativeDelayedError, public QDeclarativeRefCount

   111 {

   112 public:

   113     QDeclarativeExpressionData();

   114     virtual ~QDeclarativeExpressionData();

   115 

   116     QDeclarativeExpressionPrivate *q;

   117 

   118     QDeclarativeRefCount *dataRef;

   119     QString expression;

   120     bool expressionFunctionValid:1;

   121     bool expressionRewritten:1;

   122     QScriptValue expressionFunction;

   123     QScriptValue expressionContext;

   124 

   125     QObject *me;

   126     bool trackChange;

   127 

   128     bool isShared;

   129 

   130     QString url; // This is a QString for a reason.  QUrls are slooooooow...

   131     int line;

   132 

   133     QDeclarativeNotifierEndpoint *guardList;

   134     int guardListLength;

   135 };

   136 

   137 class QDeclarativeExpression;

   138 class QString;

   139 class QDeclarativeExpressionPrivate : public QObjectPrivate

   140 {

   141     Q_DECLARE_PUBLIC(QDeclarativeExpression)

   142 public:

   143     QDeclarativeExpressionPrivate();

   144     QDeclarativeExpressionPrivate(QDeclarativeExpressionData *);

   145     ~QDeclarativeExpressionPrivate();

   146 

   147     void init(QDeclarativeContextData *, const QString &, QObject *);

   148     void init(QDeclarativeContextData *, void *, QDeclarativeRefCount *, QObject *, const QString &, int);

   149 

   150     QDeclarativeExpressionData *data;

   151 

   152     QVariant value(QObject *secondaryScope = 0, bool *isUndefined = 0);

   153     QScriptValue scriptValue(QObject *secondaryScope = 0, bool *isUndefined = 0);

   154 

   155     QScriptValue eval(QObject *secondaryScope, bool *isUndefined = 0);

   156 

   157     void updateGuards(const QPODVector<QDeclarativeEnginePrivate::CapturedProperty> &properties);

   158     void clearGuards();

   159 

   160     static QDeclarativeExpressionPrivate *get(QDeclarativeExpression *expr) {

   161         return static_cast<QDeclarativeExpressionPrivate *>(QObjectPrivate::get(expr));

   162     }

   163     static QDeclarativeExpression *get(QDeclarativeExpressionPrivate *expr) {

   164         return expr->q_func();

   165     }

   166 

   167     void _q_notify();

   168     virtual void emitValueChanged();

   169 

   170     static void exceptionToError(QScriptEngine *, QDeclarativeError &);

   171     static QScriptValue evalInObjectScope(QDeclarativeContextData *, QObject *, const QString &, const QString &,

   172                                           int, QScriptValue *);

   173     static QScriptValue evalInObjectScope(QDeclarativeContextData *, QObject *, const QScriptProgram &, 

   174                                           QScriptValue *);

   175 };

   176 

   177 QT_END_NAMESPACE

   178 

   179 #endif // QDECLARATIVEEXPRESSION_P_H