1 /* 2 * Copyright (c) 2022-2025 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_GRID_GRID_LAYOUT_BASE_ALGORITHM_H 17 #define FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERN_GRID_GRID_LAYOUT_BASE_ALGORITHM_H 18 19 #include <utility> 20 21 #include "core/components_ng/layout/layout_algorithm.h" 22 #include "core/components_ng/pattern/grid/grid_item_layout_property.h" 23 #include "core/components_ng/pattern/grid/grid_item_pattern.h" 24 #include "core/components_ng/pattern/grid/grid_layout_info.h" 25 26 namespace OHOS::Ace::NG { 27 28 class ACE_EXPORT GridLayoutBaseAlgorithm : public LayoutAlgorithm { 29 DECLARE_ACE_TYPE(GridLayoutBaseAlgorithm, LayoutAlgorithm); 30 31 public: GridLayoutBaseAlgorithm(GridLayoutInfo gridLayoutInfo)32 explicit GridLayoutBaseAlgorithm(GridLayoutInfo gridLayoutInfo) : info_(std::move(gridLayoutInfo)) {}; 33 ~GridLayoutBaseAlgorithm() override = default; 34 GetGridLayoutInfo()35 const GridLayoutInfo& GetGridLayoutInfo() 36 { 37 return std::move(info_); 38 } 39 UpdateRealGridItemPositionInfo(const RefPtr<LayoutWrapper> & itemLayoutWrapper,int32_t mainIndex,int32_t crossIndex)40 virtual void UpdateRealGridItemPositionInfo( 41 const RefPtr<LayoutWrapper>& itemLayoutWrapper, int32_t mainIndex, int32_t crossIndex) 42 { 43 auto gridItemLayoutProperty = 44 AceType::DynamicCast<GridItemLayoutProperty>(itemLayoutWrapper->GetLayoutProperty()); 45 CHECK_NULL_VOID(gridItemLayoutProperty); 46 bool isItemAtExpectedPosition = gridItemLayoutProperty->CheckWhetherCurrentItemAtExpectedPosition(info_.axis_); 47 auto gridItemNode = itemLayoutWrapper->GetHostNode(); 48 CHECK_NULL_VOID(gridItemNode); 49 auto gridItemPattern = gridItemNode->GetPattern<GridItemPattern>(); 50 CHECK_NULL_VOID(gridItemPattern); 51 if (isItemAtExpectedPosition) { 52 gridItemPattern->ResetGridItemInfo(); 53 } 54 if (!isItemAtExpectedPosition && info_.hasBigItem_) { 55 GridItemIndexInfo itemInfo; 56 itemInfo.mainIndex = mainIndex; 57 itemInfo.crossIndex = crossIndex; 58 itemInfo.mainSpan = gridItemLayoutProperty->GetRealMainSpan(info_.axis_); 59 itemInfo.crossSpan = gridItemLayoutProperty->GetRealCrossSpan(info_.axis_); 60 itemInfo.mainStart = mainIndex - itemInfo.mainSpan + 1; 61 itemInfo.mainEnd = mainIndex; 62 itemInfo.crossStart = crossIndex; 63 itemInfo.crossEnd = crossIndex + itemInfo.crossSpan - 1; 64 gridItemPattern->ResetGridItemInfo(); 65 gridItemPattern->SetIrregularItemInfo(itemInfo); 66 } 67 } 68 69 static void LostChildFocusToSelf(LayoutWrapper* layoutWrapper, int32_t start, int32_t end); MeasureInNextFrame()70 bool MeasureInNextFrame() const override 71 { 72 return measureInNextFrame_; 73 } 74 75 protected: 76 void AdjustChildrenHeight(LayoutWrapper* layoutWrapper); 77 78 // The default value is set to true to skip the second measure in other layout algorithms. IsIrregularLine(int32_t lineIndex)79 virtual bool IsIrregularLine(int32_t lineIndex) const 80 { 81 return true; 82 } 83 ResetFocusedIndex(LayoutWrapper * layoutWrapper)84 void ResetFocusedIndex(LayoutWrapper* layoutWrapper) 85 { 86 auto grid = layoutWrapper->GetHostNode(); 87 CHECK_NULL_VOID(grid); 88 auto pattern = grid->GetPattern<GridPattern>(); 89 CHECK_NULL_VOID(pattern); 90 pattern->ResetFocusedIndex(); 91 } 92 93 void UpdateOverlay(LayoutWrapper* layoutWrapper); 94 95 GridLayoutInfo info_; 96 bool measureInNextFrame_ = false; 97 bool syncLoad_ = false; 98 ACE_DISALLOW_COPY_AND_MOVE(GridLayoutBaseAlgorithm); 99 }; 100 101 } // namespace OHOS::Ace::NG 102 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERN_GRID_GRID_LAYOUT_BASE_ALGORITHM_H 103