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21 ** GNU General Public License Usage
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42 #ifndef QQMLBOUNDSIGNAL_P_H
43 #define QQMLBOUNDSIGNAL_P_H
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.
56 #include <QtCore/qmetaobject.h>
58 #include <private/qqmlabstractexpression_p.h>
59 #include <private/qqmljavascriptexpression_p.h>
60 #include <private/qqmlboundsignalexpressionpointer_p.h>
61 #include <private/qqmlnotifier_p.h>
62 #include <private/qflagpointer_p.h>
63 #include <private/qqmlrefcount_p.h>
64 #include <private/qqmlglobal_p.h>
65 #include <private/qbitfield_p.h>
69 class Q_QML_PRIVATE_EXPORT QQmlBoundSignalExpression : public QQmlAbstractExpression, public QQmlJavaScriptExpression, public QQmlRefCount
72 QQmlBoundSignalExpression(QObject *target, int index,
73 QQmlContextData *ctxt, QObject *scope, const QByteArray &expression,
74 bool isRewritten, const QString &fileName, quint16 line, quint16 column);
75 QQmlBoundSignalExpression(QObject *target, int index,
76 QQmlContextData *ctxt, QObject *scope, const QString &expression,
77 bool isRewritten, const QString &fileName, quint16 line, quint16 column);
79 // "inherited" from QQmlJavaScriptExpression.
80 static QString expressionIdentifier(QQmlJavaScriptExpression *);
81 static void expressionChanged(QQmlJavaScriptExpression *);
83 void setParameterCountForJS(int count) { m_parameterCountForJS = count; }
85 // evaluation of a bound signal expression doesn't return any value
86 void evaluate(void **a);
88 QString sourceFile() const { return m_fileName; }
89 quint16 lineNumber() const { return m_line; }
90 quint16 columnNumber() const { return m_column; }
91 QString expression() const;
92 QObject *target() const { return m_target; }
94 QQmlEngine *engine() const { return context() ? context()->engine : 0; }
97 ~QQmlBoundSignalExpression();
99 void init(QQmlContextData *ctxt, QObject *scope);
100 bool hasParameterInfo() const { return m_parameterCountForJS > 0; }
102 v8::Persistent<v8::Object> m_v8qmlscope;
103 v8::Persistent<v8::Function> m_v8function;
105 //either expressionUtf8 or expression will be used (but not both).
106 //once m_v8function is valid, we clear both expressions, and
107 //extract it from m_v8function if needed.
108 QByteArray m_expressionUtf8;
109 QString m_expression; //only used when expression needs to be rewritten
114 int m_parameterCountForJS;
119 bool m_expressionFunctionValid:1;
120 bool m_expressionFunctionRewritten:1;
121 bool m_invalidParameterName:1;
124 class Q_QML_PRIVATE_EXPORT QQmlAbstractBoundSignal
127 QQmlAbstractBoundSignal();
128 virtual ~QQmlAbstractBoundSignal();
130 virtual int index() const = 0;
131 virtual QQmlBoundSignalExpression *expression() const = 0;
132 virtual QQmlBoundSignalExpressionPointer setExpression(QQmlBoundSignalExpression *) = 0;
133 virtual QQmlBoundSignalExpressionPointer takeExpression(QQmlBoundSignalExpression *) = 0;
134 virtual bool isEvaluating() const = 0;
136 void removeFromObject();
138 void addToObject(QObject *owner);
141 friend class QQmlData;
142 friend class QQmlPropertyPrivate;
143 friend class QQmlEngineDebugService;
144 QQmlAbstractBoundSignal **m_prevSignal;
145 QQmlAbstractBoundSignal *m_nextSignal;
148 class Q_QML_PRIVATE_EXPORT QQmlBoundSignal : public QQmlAbstractBoundSignal,
149 public QQmlNotifierEndpoint
152 QQmlBoundSignal(QObject *target, int signal, QObject *owner, QQmlEngine *engine);
153 virtual ~QQmlBoundSignal();
157 QQmlBoundSignalExpression *expression() const;
158 QQmlBoundSignalExpressionPointer setExpression(QQmlBoundSignalExpression *);
159 QQmlBoundSignalExpressionPointer takeExpression(QQmlBoundSignalExpression *);
161 bool isEvaluating() const { return m_isEvaluating; }
164 friend void QQmlBoundSignal_callback(QQmlNotifierEndpoint *, void **);
166 QQmlBoundSignalExpressionPointer m_expression;
173 #endif // QQMLBOUNDSIGNAL_P_H