1 /*
2  * Copyright (c) 2022 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 "components/ui_tree_manager.h"
17 
18 namespace OHOS {
GetInstance()19 UITreeManager& UITreeManager::GetInstance()
20 {
21     static UITreeManager manager;
22     return manager;
23 }
24 
RegistViewLifeEvent(ViewFunc * func)25 void UITreeManager::RegistViewLifeEvent(ViewFunc* func)
26 {
27     auto p = lifeEvents_.Begin();
28     if (func == nullptr) {
29         return;
30     }
31     while (p != lifeEvents_.End()) {
32         if (p->data_ == func) {
33             return;
34         }
35         p = p->next_;
36     }
37     lifeEvents_.PushBack(func);
38 }
39 
UnregistViewLifeEvent(ViewFunc * func)40 void UITreeManager::UnregistViewLifeEvent(ViewFunc* func)
41 {
42     auto p = lifeEvents_.Begin();
43     while (p != lifeEvents_.End()) {
44         if (p->data_ == func) {
45             lifeEvents_.Remove(p);
46             return;
47         }
48         p = p->next_;
49     }
50 }
51 
GetLastEvent(UIView * & view,ViewLifeEvent & event)52 void UITreeManager::GetLastEvent(UIView*& view, ViewLifeEvent& event)
53 {
54     view = lastEventView_;
55     event = lastEvent_;
56 }
57 
OnLifeEvent(UIView * view,ViewLifeEvent event)58 void UITreeManager::OnLifeEvent(UIView* view, ViewLifeEvent event)
59 {
60     lastEventView_ = view;
61     lastEvent_ = event;
62     auto p = lifeEvents_.Begin();
63     while (p != lifeEvents_.End()) {
64         p->data_();
65         p = p->next_;
66     }
67 }
68 
69 } // namespace OHOS
70