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_NG_PATTERN_REFRESH_LAYOUT_ALGORITHM_H 17 #define FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERN_REFRESH_LAYOUT_ALGORITHM_H 18 19 #include <string> 20 #include <utility> 21 22 #include "frameworks/core/components_ng/layout/box_layout_algorithm.h" 23 #include "frameworks/core/components_ng/layout/layout_wrapper.h" 24 #include "frameworks/core/components_ng/pattern/refresh/refresh_layout_property.h" 25 26 namespace OHOS::Ace::NG { 27 28 class ACE_EXPORT RefreshLayoutAlgorithm : public BoxLayoutAlgorithm { 29 DECLARE_ACE_TYPE(RefreshLayoutAlgorithm, BoxLayoutAlgorithm); 30 31 public: 32 RefreshLayoutAlgorithm(); 33 ~RefreshLayoutAlgorithm() override = default; 34 void Measure(LayoutWrapper* layoutWrapper) override; 35 void Layout(LayoutWrapper* layoutWrapper) override; 36 SetCustomBuilderIndex(int32_t index)37 void SetCustomBuilderIndex(int32_t index) 38 { 39 customBuilderIndex_ = index; 40 } 41 SetCustomBuilderOffset(float offset)42 void SetCustomBuilderOffset(float offset) 43 { 44 customBuilderOffset_ = offset; 45 } 46 SetScrollOffset(float offset)47 void SetScrollOffset(float offset) 48 { 49 scrollOffset_ = offset; 50 } 51 SetBuilderMeasureBaseHeight(float builderBaseHeight)52 void SetBuilderMeasureBaseHeight(float builderBaseHeight) 53 { 54 builderBaseHeight_ = builderBaseHeight; 55 } 56 SetIsHighVersion(bool value)57 void SetIsHighVersion(bool value) 58 { 59 isHighVersion_ = value; 60 } 61 62 private: HasCustomBuilderIndex()63 bool HasCustomBuilderIndex() const 64 { 65 return customBuilderIndex_.has_value(); 66 } 67 OptionalSizeF CalculateBuilderSize( 68 RefPtr<LayoutWrapper> childLayoutWrapper, LayoutConstraintF& constraint, float customBaseHeight); 69 void PerformLayout(LayoutWrapper* layoutWrapper); 70 void UpdateChildPosition(LayoutWrapper* layoutWrapper, int32_t index, OffsetF& paddingOffsetChild); 71 72 float builderBaseHeight_ = 0.0f; 73 float customBuilderOffset_ = 0.0f; 74 float scrollOffset_ = 0.0f; 75 bool isHighVersion_ = true; 76 std::optional<int32_t> customBuilderIndex_; 77 ACE_DISALLOW_COPY_AND_MOVE(RefreshLayoutAlgorithm); 78 }; 79 } // namespace OHOS::Ace::NG 80 81 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERN_REFRESH_LAYOUT_ALGORITHM_H 82