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 | #include "qv4variantobject_p.h" |
5 | #include "qv4functionobject_p.h" |
6 | #include <private/qqmlvaluetypewrapper_p.h> |
7 | #include <private/qv4qobjectwrapper_p.h> |
8 | |
9 | QT_BEGIN_NAMESPACE |
10 | |
11 | using namespace QV4; |
12 | |
13 | DEFINE_OBJECT_VTABLE(VariantObject); |
14 | |
15 | void Heap::VariantObject::init() |
16 | { |
17 | Object::init(); |
18 | scarceData = new ExecutionEngine::ScarceResourceData; |
19 | } |
20 | |
21 | void Heap::VariantObject::init(const QMetaType type, const void *data) |
22 | { |
23 | Object::init(); |
24 | scarceData = new ExecutionEngine::ScarceResourceData(type, data); |
25 | if (isScarce()) |
26 | removeVmePropertyReference(); |
27 | } |
28 | |
29 | bool VariantObject::Data::isScarce() const |
30 | { |
31 | int t = data().userType(); |
32 | return t == QMetaType::QPixmap || t == QMetaType::QImage; |
33 | } |
34 | |
35 | bool VariantObject::virtualIsEqualTo(Managed *m, Managed *other) |
36 | { |
37 | Q_ASSERT(m->as<QV4::VariantObject>()); |
38 | QV4::VariantObject *lv = static_cast<QV4::VariantObject *>(m); |
39 | |
40 | if (QV4::VariantObject *rv = other->as<QV4::VariantObject>()) |
41 | return lv->d()->data() == rv->d()->data(); |
42 | |
43 | if (QV4::QQmlValueTypeWrapper *v = other->as<QQmlValueTypeWrapper>()) |
44 | return v->isEqual(value: lv->d()->data()); |
45 | |
46 | return false; |
47 | } |
48 | |
49 | void VariantObject::addVmePropertyReference() const |
50 | { |
51 | if (d()->isScarce() && ++d()->vmePropertyReferenceCount == 1) { |
52 | // remove from the ep->scarceResources list |
53 | // since it is now no longer eligible to be |
54 | // released automatically by the engine. |
55 | d()->addVmePropertyReference(); |
56 | } |
57 | } |
58 | |
59 | void VariantObject::removeVmePropertyReference() const |
60 | { |
61 | if (d()->isScarce() && --d()->vmePropertyReferenceCount == 0) { |
62 | // and add to the ep->scarceResources list |
63 | // since it is now eligible to be released |
64 | // automatically by the engine. |
65 | d()->removeVmePropertyReference(); |
66 | } |
67 | } |
68 | |
69 | |
70 | void VariantPrototype::init() |
71 | { |
72 | defineDefaultProperty(QStringLiteral("preserve" ), code: method_preserve, argumentCount: 0); |
73 | defineDefaultProperty(QStringLiteral("destroy" ), code: method_destroy, argumentCount: 0); |
74 | defineDefaultProperty(name: engine()->id_valueOf(), code: method_valueOf, argumentCount: 0); |
75 | defineDefaultProperty(name: engine()->id_toString(), code: method_toString, argumentCount: 0); |
76 | } |
77 | |
78 | ReturnedValue VariantPrototype::method_preserve(const FunctionObject *, const Value *thisObject, const Value *, int) |
79 | { |
80 | const VariantObject *o = thisObject->as<QV4::VariantObject>(); |
81 | if (o && o->d()->isScarce()) |
82 | o->d()->addVmePropertyReference(); |
83 | RETURN_UNDEFINED(); |
84 | } |
85 | |
86 | ReturnedValue VariantPrototype::method_destroy(const FunctionObject *, const Value *thisObject, const Value *, int) |
87 | { |
88 | const VariantObject *o = thisObject->as<QV4::VariantObject>(); |
89 | if (o) { |
90 | if (o->d()->isScarce()) |
91 | o->d()->addVmePropertyReference(); |
92 | o->d()->data() = QVariant(); |
93 | } |
94 | RETURN_UNDEFINED(); |
95 | } |
96 | |
97 | ReturnedValue VariantPrototype::method_toString(const FunctionObject *b, const Value *thisObject, const Value *, int) |
98 | { |
99 | ExecutionEngine *v4 = b->engine(); |
100 | const VariantObject *o = thisObject->as<QV4::VariantObject>(); |
101 | if (!o) |
102 | RETURN_UNDEFINED(); |
103 | const QVariant variant = o->d()->data(); |
104 | QString result = variant.toString(); |
105 | if (result.isEmpty() && !variant.canConvert(targetType: QMetaType(QMetaType::QString))) { |
106 | QDebug dbg(&result); |
107 | dbg << variant; |
108 | // QDebug appends a space, we're not interested in continuing the stream so we chop it off. |
109 | // Can't use nospace() because it would affect the debug-stream operator of the variant. |
110 | result.chop(n: 1); |
111 | } |
112 | return Encode(v4->newString(s: result)); |
113 | } |
114 | |
115 | ReturnedValue VariantPrototype::method_valueOf(const FunctionObject *b, const Value *thisObject, const Value *, int) |
116 | { |
117 | const VariantObject *o = thisObject->as<QV4::VariantObject>(); |
118 | if (o) { |
119 | QVariant v = o->d()->data(); |
120 | switch (v.userType()) { |
121 | case QMetaType::UnknownType: |
122 | return Encode::undefined(); |
123 | case QMetaType::QString: |
124 | return Encode(b->engine()->newString(s: v.toString())); |
125 | case QMetaType::Int: |
126 | return Encode(v.toInt()); |
127 | case QMetaType::Double: |
128 | case QMetaType::UInt: |
129 | return Encode(v.toDouble()); |
130 | case QMetaType::Bool: |
131 | return Encode(v.toBool()); |
132 | default: |
133 | if (QMetaType(v.metaType()).flags() & QMetaType::IsEnumeration) |
134 | if (v.metaType().sizeOf() <= qsizetype(sizeof(int))) |
135 | return Encode(v.toInt()); |
136 | if (v.canConvert<double>()) |
137 | return Encode(v.toDouble()); |
138 | if (v.canConvert<int>()) |
139 | return Encode(v.toInt()); |
140 | if (v.canConvert<uint>()) |
141 | return Encode(v.toUInt()); |
142 | if (v.canConvert<bool>()) |
143 | return Encode(v.toBool()); |
144 | if (v.canConvert<QString>()) |
145 | return Encode(b->engine()->newString(s: v.toString())); |
146 | break; |
147 | } |
148 | } |
149 | return thisObject->asReturnedValue(); |
150 | } |
151 | |
152 | QT_END_NAMESPACE |
153 | |