1 /*
2  * Copyright (c) 2021 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_V2_FOREACH_LAZY_FOREACH_COMPONENT_H
17 #define FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_V2_FOREACH_LAZY_FOREACH_COMPONENT_H
18 
19 #include "base/memory/ace_type.h"
20 #include "base/utils/macros.h"
21 #include "core/components/foreach/for_each_component.h"
22 #include "core/components_v2/common/common_def.h"
23 
24 namespace OHOS::Ace::V2 {
25 
26 typedef struct Operation {
27     std::string type;
28     int32_t count;
29     int32_t index;
30     std::pair<int32_t, int32_t> coupleIndex;
31     std::string key;
32     std::pair<std::string, std::string> coupleKey;
33     std::list<std::string> keyList;
34 } Operation;
35 
36 class DataChangeListener : virtual public AceType {
37     DECLARE_ACE_TYPE(DataChangeListener, AceType)
38 public:
39     virtual void OnDataReloaded() = 0;
40     virtual void OnDataAdded(size_t index) = 0;
41     virtual void OnDataBulkAdded(size_t index, size_t count) = 0;
42     virtual void OnDataDeleted(size_t index) = 0;
43     virtual void OnDataBulkDeleted(size_t index, size_t count) = 0;
44     virtual void OnDataChanged(size_t index) = 0;
45     // this is exchange impl.
46     virtual void OnDataMoved(size_t from, size_t to) = 0;
47     virtual void OnDatasetChange(const std::list<Operation>& DataOperations) = 0;
OnDataBulkChanged(size_t index,size_t count)48     virtual void OnDataBulkChanged(size_t index, size_t count) {}
OnDataMoveToNewPlace(size_t from,size_t to)49     virtual void OnDataMoveToNewPlace(size_t from, size_t to) {}
50 };
51 
52 class ACE_EXPORT LazyForEachComponent : public V1::ForEachComponent {
53     DECLARE_ACE_TYPE(V2::LazyForEachComponent, V1::ForEachComponent);
54 
55 public:
LazyForEachComponent(const std::string & id)56     explicit LazyForEachComponent(const std::string& id) : V1::ForEachComponent(id, "LazyForEach") {}
57     ~LazyForEachComponent() override = default;
58 
59     RefPtr<Element> CreateElement() override;
60 
Count()61     size_t Count() override
62     {
63         return TotalCount();
64     }
65 
66     size_t TotalCount();
67     RefPtr<Component> GetChildByIndex(size_t index);
68 
ReleaseChildGroupByComposedId(const std::string & composedId)69     virtual void ReleaseChildGroupByComposedId(const std::string& composedId) {}
70     virtual void RegisterDataChangeListener(const RefPtr<DataChangeListener>& listener) = 0;
71     virtual void UnregisterDataChangeListener(DataChangeListener* listener) = 0;
72 
73 protected:
74     virtual size_t OnGetTotalCount() = 0;
75     virtual RefPtr<Component> OnGetChildByIndex(size_t index) = 0;
76 
77     std::list<RefPtr<Component>>& ExpandChildren() override;
78 
Expanded()79     bool Expanded() const
80     {
81         return expanded_;
82     }
83 
84 private:
85     bool expanded_ = false;
86 
87     ACE_DISALLOW_COPY_AND_MOVE(LazyForEachComponent);
88 };
89 
90 } // namespace OHOS::Ace::V2
91 
92 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_V2_FOREACH_LAZY_FOREACH_COMPONENT_H
93