1 /*
2 * Copyright (c) 2024 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #ifndef META_SRC_PROXY_OBJECT_H
17 #define META_SRC_PROXY_OBJECT_H
18
19 #include <base/containers/unordered_map.h>
20
21 #include <meta/api/event_handler.h>
22 #include <meta/api/property/default_value_bind.h>
23 #include <meta/base/interface_macros.h>
24 #include <meta/base/namespace.h>
25 #include <meta/ext/object.h>
26 #include <meta/interface/builtin_objects.h>
27 #include <meta/interface/intf_proxy_object.h>
28
29 #include "object.h"
30
META_BEGIN_NAMESPACE()31 META_BEGIN_NAMESPACE()
32
33 namespace Internal {
34
35 class ProxyObject final : public Internal::ObjectFwd<ProxyObject, META_NS::ClassId::ProxyObject, IProxyObject> {
36 using Super = Internal::ObjectFwd<ProxyObject, META_NS::ClassId::ProxyObject, IProxyObject>;
37
38 public:
39 ProxyObject() = default;
40 ~ProxyObject() override;
41 META_NO_COPY_MOVE(ProxyObject)
42
43 public: // ILifecycle
44 bool Build(const IMetadata::Ptr& data) override;
45
46 public: // IMetadata
47 IProperty::Ptr GetPropertyByName(BASE_NS::string_view name) override;
48 IProperty::ConstPtr GetPropertyByName(BASE_NS::string_view name) const override;
49 void RemoveProperty(const IProperty::Ptr&) override;
50
51 BASE_NS::vector<IProperty::Ptr> GetAllProperties() override;
52 BASE_NS::vector<IProperty::ConstPtr> GetAllProperties() const override;
53
54 public: // IProxyObject
55 META_IMPLEMENT_INTERFACE_PROPERTY(IProxyObject, ProxyModeBitsValue, Mode, ProxyMode::REFLECT_PROXY_HIERARCHY)
56 META_IMPLEMENT_INTERFACE_PROPERTY(IProxyObject, bool, Dynamic, true);
57 const IObject::Ptr GetTarget() const override;
58 bool SetTarget(const IObject::Ptr& target) override;
59 BASE_NS::vector<IProperty::ConstPtr> GetOverrides() const override;
60 IProperty::ConstPtr GetOverride(BASE_NS::string_view name) const override;
61 IProperty::Ptr SetPropertyTarget(const IProperty::Ptr& property) override;
62 IProperty::ConstPtr GetProxyProperty(BASE_NS::string_view name) const override;
63
64 private:
65 void ListenTargetChanges();
66 void ResetTargetListener();
67 void RefreshProperties();
68 IProperty::Ptr AddProxyProperty(const IProperty::ConstPtr& tp);
69 IProperty::Ptr AddProxyProperty(BASE_NS::string_view name);
70 void PopulateAllProperties();
71 bool ShouldSerialise(const IProperty::Ptr& p) const;
72 void UpdateSerializeState();
73 void ReflectHierarchy(const IObject::Ptr& target);
74 void ReflectTargetForProperty(const IMetadata::Ptr& m, BASE_NS::string_view name, const IProxyObject::Ptr& proxy);
75
76 void OnPropertyAdded(const ChildChangedInfo& info);
77 void OnPropertyRemoved(const ChildChangedInfo& info);
78 void OnPropertyChanged(const IProperty::Ptr& p);
79
80 private:
81 IObject::WeakPtr target_;
82 mutable BASE_NS::unordered_map<BASE_NS::string, DefaultValueBind> proxyProperties_;
83 EventHandler targetAddedListener_;
84 EventHandler targetRemovedListener_;
85 EventHandler metaAdded_;
86 EventHandler metaRemoved_;
87 bool updating_ {};
88 };
89
90 } // namespace Internal
91
92 META_END_NAMESPACE()
93
94 #endif
95