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 #include "object_container.h"
17
18 #include <algorithm>
19
20 #include <meta/base/interface_utils.h>
21 #include <meta/interface/intf_containable.h>
22 #include <meta/interface/intf_content.h>
23 #include <meta/interface/property/intf_property.h>
24
META_BEGIN_NAMESPACE()25 META_BEGIN_NAMESPACE()
26
27 bool ObjectContainer::Build(const IMetadata::Ptr& data)
28 {
29 bool ret = Super::Build(data);
30 if (ret) {
31 parent_ = GetSelf<IContainer>();
32 SetImplementingIContainer(GetSelf<IObject>().get(), this);
33 }
34 return ret;
35 }
36
Destroy()37 void ObjectContainer::Destroy()
38 {
39 InternalRemoveAll();
40 Super::Destroy();
41 }
42
GetAboutToChange()43 IEvent::Ptr ObjectContainer::GetAboutToChange()
44 {
45 auto ev = GetEvent("ContainerAboutToChange", MetadataQuery::EXISTING);
46 return ev && ev->HasHandlers() ? ev : nullptr;
47 }
CallAboutToChange(ContainerChangeType type,const IObject::Ptr & object)48 bool ObjectContainer::CallAboutToChange(ContainerChangeType type, const IObject::Ptr& object)
49 {
50 bool success = true;
51 if (auto ev = GetAboutToChange()) {
52 Invoke<IOnChildChanging>(ev, ChildChangedInfo { type, object, parent_ }, success);
53 }
54 return success;
55 }
56
Add(const IObject::Ptr & object)57 bool ObjectContainer::Add(const IObject::Ptr& object)
58 {
59 return CallAboutToChange(ContainerChangeType::ADDING, object) && Container::Add(object);
60 }
Insert(SizeType index,const IObject::Ptr & object)61 bool ObjectContainer::Insert(SizeType index, const IObject::Ptr& object)
62 {
63 return CallAboutToChange(ContainerChangeType::ADDING, object) && Container::Insert(index, object);
64 }
Replace(const IObject::Ptr & child,const IObject::Ptr & replaceWith,bool addAlways)65 bool ObjectContainer::Replace(const IObject::Ptr& child, const IObject::Ptr& replaceWith, bool addAlways)
66 {
67 return CallAboutToChange(ContainerChangeType::REMOVING, child) &&
68 CallAboutToChange(ContainerChangeType::ADDING, replaceWith) &&
69 Container::Replace(child, replaceWith, addAlways);
70 }
Remove(SizeType index)71 bool ObjectContainer::Remove(SizeType index)
72 {
73 auto object = GetAt(index);
74 return object && Remove(object);
75 }
Remove(const IObject::Ptr & object)76 bool ObjectContainer::Remove(const IObject::Ptr& object)
77 {
78 return CallAboutToChange(ContainerChangeType::REMOVING, object) && Container::Remove(object);
79 }
RemoveAll()80 void ObjectContainer::RemoveAll()
81 {
82 bool success = true;
83 auto list = GetAll();
84 for (auto it = list.begin(); it != list.end() && success; ++it) {
85 success = success && CallAboutToChange(ContainerChangeType::REMOVING, *it);
86 }
87 if (success) {
88 Container::RemoveAll();
89 }
90 }
91
92 META_END_NAMESPACE()
93