1 | // Copyright (C) 2023 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 QQMLDMOBJECTDATA_P_H |
5 | #define QQMLDMOBJECTDATA_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 <private/qqmladaptormodelenginedata_p.h> |
19 | #include <private/qqmldelegatemodel_p_p.h> |
20 | |
21 | #include <private/qobject_p.h> |
22 | #include <QtCore/qpointer.h> |
23 | |
24 | QT_BEGIN_NAMESPACE |
25 | |
26 | class VDMObjectDelegateDataType; |
27 | class QQmlDMObjectData : public QQmlDelegateModelItem, public QQmlAdaptorModelProxyInterface |
28 | { |
29 | Q_OBJECT |
30 | Q_PROPERTY(QObject *modelData READ modelData NOTIFY modelDataChanged) |
31 | QT_ANONYMOUS_PROPERTY(QObject * READ modelData NOTIFY modelDataChanged FINAL) |
32 | Q_INTERFACES(QQmlAdaptorModelProxyInterface) |
33 | public: |
34 | QQmlDMObjectData( |
35 | const QQmlRefPointer<QQmlDelegateModelItemMetaType> &metaType, |
36 | VDMObjectDelegateDataType *dataType, |
37 | int index, int row, int column, |
38 | QObject *object); |
39 | |
40 | void setModelData(QObject *modelData) |
41 | { |
42 | if (modelData == object) |
43 | return; |
44 | |
45 | object = modelData; |
46 | emit modelDataChanged(); |
47 | } |
48 | |
49 | QObject *modelData() const { return object; } |
50 | QObject *proxiedObject() override { return object; } |
51 | |
52 | QPointer<QObject> object; |
53 | |
54 | Q_SIGNALS: |
55 | void modelDataChanged(); |
56 | }; |
57 | |
58 | class VDMObjectDelegateDataType final |
59 | : public QQmlRefCounted<VDMObjectDelegateDataType>, |
60 | public QQmlAdaptorModel::Accessors |
61 | { |
62 | public: |
63 | int propertyOffset; |
64 | int signalOffset; |
65 | bool shared; |
66 | QMetaObjectBuilder builder; |
67 | |
68 | VDMObjectDelegateDataType() |
69 | : propertyOffset(0) |
70 | , signalOffset(0) |
71 | , shared(true) |
72 | { |
73 | } |
74 | |
75 | VDMObjectDelegateDataType(const VDMObjectDelegateDataType &type) |
76 | : propertyOffset(type.propertyOffset) |
77 | , signalOffset(type.signalOffset) |
78 | , shared(false) |
79 | , builder(type.metaObject.data(), QMetaObjectBuilder::Properties |
80 | | QMetaObjectBuilder::Signals |
81 | | QMetaObjectBuilder::SuperClass |
82 | | QMetaObjectBuilder::ClassName) |
83 | { |
84 | builder.setFlags(MetaObjectFlag::DynamicMetaObject); |
85 | } |
86 | |
87 | int rowCount(const QQmlAdaptorModel &model) const override |
88 | { |
89 | return model.list.count(); |
90 | } |
91 | |
92 | int columnCount(const QQmlAdaptorModel &) const override |
93 | { |
94 | return 1; |
95 | } |
96 | |
97 | QVariant value(const QQmlAdaptorModel &model, int index, const QString &role) const override |
98 | { |
99 | if (QObject *object = model.list.at(index).value<QObject *>()) |
100 | return object->property(name: role.toUtf8()); |
101 | return QVariant(); |
102 | } |
103 | |
104 | QQmlDelegateModelItem *createItem( |
105 | QQmlAdaptorModel &model, |
106 | const QQmlRefPointer<QQmlDelegateModelItemMetaType> &metaType, |
107 | int index, int row, int column) override |
108 | { |
109 | if (!metaObject) |
110 | initializeMetaType(model); |
111 | return index >= 0 && index < model.list.count() |
112 | ? new QQmlDMObjectData(metaType, this, index, row, column, qvariant_cast<QObject *>(v: model.list.at(index))) |
113 | : nullptr; |
114 | } |
115 | |
116 | void initializeMetaType(QQmlAdaptorModel &model) |
117 | { |
118 | Q_UNUSED(model); |
119 | QQmlAdaptorModelEngineData::setModelDataType<QQmlDMObjectData>(builder: &builder, metaType: this); |
120 | |
121 | metaObject.reset(other: builder.toMetaObject()); |
122 | // Note: ATM we cannot create a shared property cache for this class, since each model |
123 | // object can have different properties. And to make those properties available to the |
124 | // delegate, QQmlDMObjectData makes use of a QAbstractDynamicMetaObject subclass |
125 | // (QQmlDMObjectDataMetaObject), which we cannot represent in a QQmlPropertyCache. |
126 | // By not having a shared property cache, revisioned properties in QQmlDelegateModelItem |
127 | // will always be available to the delegate, regardless of the import version. |
128 | } |
129 | |
130 | void cleanup(QQmlAdaptorModel &) const override |
131 | { |
132 | release(); |
133 | } |
134 | |
135 | bool notify(const QQmlAdaptorModel &model, const QList<QQmlDelegateModelItem *> &items, int index, int count, const QVector<int> &) const override |
136 | { |
137 | for (auto modelItem : items) { |
138 | const int modelItemIndex = modelItem->index; |
139 | if (modelItemIndex < index || modelItemIndex >= index + count) |
140 | continue; |
141 | |
142 | auto objectModelItem = static_cast<QQmlDMObjectData *>(modelItem); |
143 | QObject *updatedModelData = qvariant_cast<QObject *>(v: model.list.at(objectModelItem->index)); |
144 | objectModelItem->setModelData(updatedModelData); |
145 | } |
146 | return true; |
147 | } |
148 | }; |
149 | |
150 | class QQmlDMObjectDataMetaObject : public QAbstractDynamicMetaObject |
151 | { |
152 | public: |
153 | QQmlDMObjectDataMetaObject(QQmlDMObjectData *data, VDMObjectDelegateDataType *type) |
154 | : m_data(data) |
155 | , m_type(type) |
156 | { |
157 | QObjectPrivate *op = QObjectPrivate::get(o: m_data); |
158 | *static_cast<QMetaObject *>(this) = *type->metaObject; |
159 | op->metaObject = this; |
160 | m_type->addref(); |
161 | } |
162 | |
163 | ~QQmlDMObjectDataMetaObject() |
164 | { |
165 | m_type->release(); |
166 | } |
167 | |
168 | int metaCall(QObject *o, QMetaObject::Call call, int id, void **arguments) override |
169 | { |
170 | Q_ASSERT(o == m_data); |
171 | Q_UNUSED(o); |
172 | |
173 | static const int objectPropertyOffset = QObject::staticMetaObject.propertyCount(); |
174 | if (id >= m_type->propertyOffset |
175 | && (call == QMetaObject::ReadProperty |
176 | || call == QMetaObject::WriteProperty |
177 | || call == QMetaObject::ResetProperty)) { |
178 | if (m_data->object) |
179 | QMetaObject::metacall(m_data->object, call, id - m_type->propertyOffset + objectPropertyOffset, arguments); |
180 | return -1; |
181 | } else if (id >= m_type->signalOffset && call == QMetaObject::InvokeMetaMethod) { |
182 | QMetaObject::activate(sender: m_data, this, local_signal_index: id - m_type->signalOffset, argv: nullptr); |
183 | return -1; |
184 | } else { |
185 | return m_data->qt_metacall(call, id, arguments); |
186 | } |
187 | } |
188 | |
189 | int createProperty(const char *name, const char *) override |
190 | { |
191 | if (!m_data->object) |
192 | return -1; |
193 | const QMetaObject *metaObject = m_data->object->metaObject(); |
194 | static const int objectPropertyOffset = QObject::staticMetaObject.propertyCount(); |
195 | |
196 | const int previousPropertyCount = propertyCount() - propertyOffset(); |
197 | int propertyIndex = metaObject->indexOfProperty(name); |
198 | if (propertyIndex == -1) |
199 | return -1; |
200 | if (previousPropertyCount + objectPropertyOffset == metaObject->propertyCount()) |
201 | return propertyIndex + m_type->propertyOffset - objectPropertyOffset; |
202 | |
203 | if (m_type->shared) { |
204 | VDMObjectDelegateDataType *type = m_type; |
205 | m_type = new VDMObjectDelegateDataType(*m_type); |
206 | type->release(); |
207 | } |
208 | |
209 | const int previousMethodCount = methodCount(); |
210 | int notifierId = previousMethodCount - methodOffset(); |
211 | for (int propertyId = previousPropertyCount; propertyId < metaObject->propertyCount() - objectPropertyOffset; ++propertyId) { |
212 | QMetaProperty property = metaObject->property(index: propertyId + objectPropertyOffset); |
213 | QMetaPropertyBuilder propertyBuilder; |
214 | if (property.hasNotifySignal()) { |
215 | m_type->builder.addSignal(signature: "__" + QByteArray::number(propertyId) + "()" ); |
216 | propertyBuilder = m_type->builder.addProperty(name: property.name(), type: property.typeName(), notifierId); |
217 | ++notifierId; |
218 | } else { |
219 | propertyBuilder = m_type->builder.addProperty(name: property.name(), type: property.typeName()); |
220 | } |
221 | propertyBuilder.setWritable(property.isWritable()); |
222 | propertyBuilder.setResettable(property.isResettable()); |
223 | propertyBuilder.setConstant(property.isConstant()); |
224 | } |
225 | |
226 | m_type->metaObject.reset(other: m_type->builder.toMetaObject()); |
227 | *static_cast<QMetaObject *>(this) = *m_type->metaObject; |
228 | |
229 | notifierId = previousMethodCount; |
230 | for (int i = previousPropertyCount; i < metaObject->propertyCount() - objectPropertyOffset; ++i) { |
231 | QMetaProperty property = metaObject->property(index: i + objectPropertyOffset); |
232 | if (property.hasNotifySignal()) { |
233 | QQmlPropertyPrivate::connect( |
234 | sender: m_data->object, signal_index: property.notifySignalIndex(), receiver: m_data, method_index: notifierId); |
235 | ++notifierId; |
236 | } |
237 | } |
238 | return propertyIndex + m_type->propertyOffset - objectPropertyOffset; |
239 | } |
240 | |
241 | QQmlDMObjectData *m_data; |
242 | VDMObjectDelegateDataType *m_type; |
243 | }; |
244 | |
245 | QT_END_NAMESPACE |
246 | |
247 | #endif // QQMLDMOBJECTDATA_P_H |
248 | |