1 | // Copyright (C) 2016 The Qt Company Ltd. |
2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
3 | |
4 | #ifndef QQMLBOUNDSIGNAL_P_H |
5 | #define QQMLBOUNDSIGNAL_P_H |
6 | |
7 | // |
8 | // W A R N I N G |
9 | // ------------- |
10 | // |
11 | // This file is not part of the Qt API. It exists purely as an |
12 | // implementation detail. This header file may change from version to |
13 | // version without notice, or even be removed. |
14 | // |
15 | // We mean it. |
16 | // |
17 | |
18 | #include <QtCore/qmetaobject.h> |
19 | |
20 | #include <private/qqmljavascriptexpression_p.h> |
21 | #include <private/qqmlnotifier_p.h> |
22 | #include <private/qqmlrefcount_p.h> |
23 | #include <private/qtqmlglobal_p.h> |
24 | |
25 | QT_BEGIN_NAMESPACE |
26 | |
27 | class Q_QML_PRIVATE_EXPORT QQmlBoundSignalExpression |
28 | : public QQmlJavaScriptExpression, |
29 | public QQmlRefCounted<QQmlBoundSignalExpression> |
30 | { |
31 | friend class QQmlRefCounted<QQmlBoundSignalExpression>; |
32 | public: |
33 | QQmlBoundSignalExpression( |
34 | const QObject *target, int index, const QQmlRefPointer<QQmlContextData> &ctxt, QObject *scope, |
35 | const QString &expression, const QString &fileName, quint16 line, quint16 column, |
36 | const QString &handlerName = QString(), const QString ¶meterString = QString()); |
37 | |
38 | QQmlBoundSignalExpression( |
39 | const QObject *target, int index, const QQmlRefPointer<QQmlContextData> &ctxt, |
40 | QObject *scopeObject, QV4::Function *function, QV4::ExecutionContext *scope = nullptr); |
41 | |
42 | // inherited from QQmlJavaScriptExpression. |
43 | QString expressionIdentifier() const override; |
44 | void expressionChanged() override; |
45 | |
46 | // evaluation of a bound signal expression doesn't return any value |
47 | void evaluate(void **a); |
48 | |
49 | bool mustCaptureBindableProperty() const final {return true;} |
50 | |
51 | QString expression() const; |
52 | const QObject *target() const { return m_target; } |
53 | |
54 | private: |
55 | ~QQmlBoundSignalExpression() override; |
56 | |
57 | void init(const QQmlRefPointer<QQmlContextData> &ctxt, QObject *scope); |
58 | |
59 | bool expressionFunctionValid() const { return function() != nullptr; } |
60 | |
61 | int m_index; |
62 | const QObject *m_target; |
63 | }; |
64 | |
65 | class Q_QML_PRIVATE_EXPORT QQmlBoundSignal : public QQmlNotifierEndpoint |
66 | { |
67 | public: |
68 | QQmlBoundSignal(QObject *target, int signal, QObject *owner, QQmlEngine *engine); |
69 | ~QQmlBoundSignal(); |
70 | |
71 | void removeFromObject(); |
72 | |
73 | QQmlBoundSignalExpression *expression() const; |
74 | void takeExpression(QQmlBoundSignalExpression *); |
75 | |
76 | void setEnabled(bool enabled); |
77 | |
78 | private: |
79 | friend void QQmlBoundSignal_callback(QQmlNotifierEndpoint *, void **); |
80 | friend class QQmlPropertyPrivate; |
81 | friend class QQmlData; |
82 | friend class QQmlEngineDebugService; |
83 | |
84 | void addToObject(QObject *owner); |
85 | |
86 | QQmlBoundSignal **m_prevSignal; |
87 | QQmlBoundSignal *m_nextSignal; |
88 | |
89 | bool m_enabled; |
90 | |
91 | QQmlRefPointer<QQmlBoundSignalExpression> m_expression; |
92 | }; |
93 | |
94 | class QQmlPropertyObserver : public QPropertyObserver |
95 | { |
96 | public: |
97 | QQmlPropertyObserver(QQmlBoundSignalExpression *expr); |
98 | |
99 | private: |
100 | QQmlRefPointer<QQmlBoundSignalExpression> expression; |
101 | }; |
102 | |
103 | QT_END_NAMESPACE |
104 | |
105 | #endif // QQMLBOUNDSIGNAL_P_H |
106 | |