1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
/****************************************************************************
**
** Copyright (C) 2020 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QQMLPROPERTYBINDING_P_H
#define QQMLPROPERTYBINDING_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 <QtCore/qproperty.h>
#include <QtCore/private/qproperty_p.h>
#include "qqmlpropertydata_p.h"
#include "qqmljavascriptexpression_p.h"
#include <memory>
QT_BEGIN_NAMESPACE
namespace QV4 {
struct BoundFunction;
}
class QQmlPropertyBinding;
class Q_QML_PRIVATE_EXPORT QQmlPropertyBindingJS : public QQmlJavaScriptExpression
{
friend class QQmlPropertyBinding;
void expressionChanged() override;
QQmlPropertyBinding *asBinding()
{
return const_cast<QQmlPropertyBinding *>(static_cast<const QQmlPropertyBindingJS *>(this)->asBinding());
}
QQmlPropertyBinding const *asBinding() const;;
};
class Q_QML_PRIVATE_EXPORT QQmlPropertyBindingJSForBoundFunction : public QQmlPropertyBindingJS
{
public:
QV4::ReturnedValue evaluate(bool *isUndefined);
QV4::PersistentValue m_boundFunction;
};
class Q_QML_PRIVATE_EXPORT QQmlPropertyBinding : public QPropertyBindingPrivate
{
friend class QQmlPropertyBindingJS;
public:
QQmlPropertyBindingJS *jsExpression()
{
return const_cast<QQmlPropertyBindingJS *>(static_cast<const QQmlPropertyBinding *>(this)->jsExpression());
}
QQmlPropertyBindingJS const *jsExpression() const;
static QUntypedPropertyBinding create(const QQmlPropertyData *pd, QV4::Function *function,
QObject *obj, const QQmlRefPointer<QQmlContextData> &ctxt,
QV4::ExecutionContext *scope, QObject *target,
QQmlPropertyIndex targetIndex);
static QUntypedPropertyBinding createFromCodeString(const QQmlPropertyData *property,
const QString &str, QObject *obj,
const QQmlRefPointer<QQmlContextData> &ctxt,
const QString &url, quint16 lineNumber,
QObject *target, QQmlPropertyIndex targetIndex);
static QUntypedPropertyBinding createFromBoundFunction(const QQmlPropertyData *pd, QV4::BoundFunction *function,
QObject *obj, const QQmlRefPointer<QQmlContextData> &ctxt,
QV4::ExecutionContext *scope, QObject *target,
QQmlPropertyIndex targetIndex);
static bool doEvaluate(QMetaType metaType, QUntypedPropertyData *dataPtr, void *f) {
auto address = static_cast<std::byte*>(f);
address -= sizeof (QPropertyBindingPrivate); // f now points to QPropertyBindingPrivate suboject
// and that has the same address as QQmlPropertyBinding
return reinterpret_cast<QQmlPropertyBinding *>(address)->evaluate(metaType, dataPtr);
}
private:
QQmlPropertyBinding(QMetaType metaType, QObject *target, QQmlPropertyIndex targetIndex, bool hasBoundFunction);
bool evaluate(QMetaType metaType, void *dataPtr);
QString createBindingLoopErrorDescription(QJSEnginePrivate *ep);
struct TargetData {
QObject *target;
QQmlPropertyIndex targetIndex;
bool hasBoundFunction;
};
QObject *target();
QQmlPropertyIndex targetIndex();
bool hasBoundFunction();
static void bindingErrorCallback(QPropertyBindingPrivate *);
};
template <auto I>
struct Print {};
namespace QtPrivate {
template<>
inline constexpr BindingFunctionVTable bindingFunctionVTable<QQmlPropertyBinding> = {
&QQmlPropertyBinding::doEvaluate,
[](void *qpropertyBinding){
QQmlPropertyBinding *binding = reinterpret_cast<QQmlPropertyBinding *>(qpropertyBinding);
binding->jsExpression()->~QQmlPropertyBindingJS();
binding->~QQmlPropertyBinding();
auto address = static_cast<std::byte*>(qpropertyBinding);
delete[] address;
},
[](void *, void *){},
0
};
}
class QQmlTranslationPropertyBinding
{
public:
static QUntypedPropertyBinding Q_QML_PRIVATE_EXPORT create(const QQmlPropertyData *pd,
const QQmlRefPointer<QV4::ExecutableCompilationUnit> &compilationUnit,
const QV4::CompiledData::Binding *binding);
};
QT_END_NAMESPACE
#endif // QQMLPROPERTYBINDING_P_H
|
