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 #ifndef FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_RELATIVE_CONTAINER_RENDER_RELATIVE_CONTAINER_H
17 #define FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_RELATIVE_CONTAINER_RENDER_RELATIVE_CONTAINER_H
18 
19 #include <typeinfo>
20 
21 #include "core/components/common/layout/constants.h"
22 #include "core/components/common/properties/alignment.h"
23 #include "core/components/flex/flex_item_component.h"
24 #include "core/pipeline/base/render_node.h"
25 
26 namespace OHOS::Ace {
27 using AlignRules = std::map<AlignDirection, AlignRule>;
28 using AlignRulesMap = std::map<std::string, AlignRules>;
29 class ACE_EXPORT RenderRelativeContainer : public RenderNode {
30     DECLARE_ACE_TYPE(RenderRelativeContainer, RenderNode);
31 
32 public:
33     static RefPtr<RenderNode> Create();
34 
35     void Update(const RefPtr<Component>& component) override;
36 
37     void PerformLayout() override;
38 
GetAlignRulesMap()39     AlignRulesMap GetAlignRulesMap() const
40     {
41         return alignRulesMap_;
42     }
43 
44 private:
45     void CollectNodesById();
46     void GetDependencyRelationship();
47     bool PreTopologicalLoopDetection();
48     void TopologicalSort(std::list<std::string>& renderList);
49 
50     void CalcHorizontalLayoutParam(AlignDirection alignDirection, const AlignRule& alignRule,
51         const std::string& nodeName);
52     void CalcVerticalLayoutParam(AlignDirection alignDirection, const AlignRule& alignRule,
53         const std::string& nodeName);
54     void CalcLayoutParam(const std::map<AlignDirection, AlignRule> alignRules, LayoutParam& itemLayout,
55         const std::string& nodeName);
56 
57     double CalcHorizontalOffset(AlignDirection alignDirection, const AlignRule& alignRule,
58         double containerWidth, const std::string& nodeName);
59     double CalcVerticalOffset(AlignDirection alignDirection, const AlignRule& alignRule,
60         double containerHeight, const std::string& nodeName);
61 
62     std::list<std::string> renderList_;
63     std::map<std::string, RefPtr<RenderFlexItem>> idNodeMap_;
64     std::map<std::string, uint32_t> incomingDegreeMap_;
65     // list of nodes that relied on the key node represented by string
66     std::map<std::string, std::set<std::string>> reliedOnMap_;
67     std::list<std::string> orderedRenderList_;
68 
69     AlignRulesMap alignRulesMap_;
70 };
71 
72 } // namespace OHOS::Ace
73 
74 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_RELATIVE_CONTAINER_RENDER_RELATIVE_CONTAINER_H
75