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_LAYOUTS_BOX_LAYOUT_ALGORITHM_H 17 #define FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_LAYOUTS_BOX_LAYOUT_ALGORITHM_H 18 19 #include "base/utils/noncopyable.h" 20 #include "core/components_ng/layout/layout_algorithm.h" 21 #include "core/components/common/properties/alignment.h" 22 23 namespace OHOS::Ace::NG { 24 // BoxLayout is the class for box type measure, layout. 25 class ACE_FORCE_EXPORT BoxLayoutAlgorithm : public LayoutAlgorithm { 26 DECLARE_ACE_TYPE(BoxLayoutAlgorithm, LayoutAlgorithm); 27 public: 28 BoxLayoutAlgorithm() = default; 29 ~BoxLayoutAlgorithm() override = default; 30 31 // override measureSelf and measureChildren. 32 void Measure(LayoutWrapper* layoutWrapper) override; 33 34 void Layout(LayoutWrapper* layoutWrapper) override; 35 36 std::optional<SizeF> MeasureContent( 37 const LayoutConstraintF& contentConstraint, LayoutWrapper* layoutWrapper) override; 38 39 // Called to perform measure current render node. 40 static void PerformMeasureSelf(LayoutWrapper* layoutWrapper); 41 42 // Called to perform layout render node. 43 static void PerformLayout(LayoutWrapper* layoutWrapper); 44 45 // Called to perform measure current render node. 46 static void PerformMeasureSelfWithChildList( 47 LayoutWrapper* layoutWrapper, const std::list<RefPtr<LayoutWrapper>>& childList); 48 49 static std::optional<SizeF> PerformMeasureContent( 50 const LayoutConstraintF& contentConstraint, LayoutWrapper* layoutWrapper); 51 52 void MeasureAdaptiveLayoutChildren(LayoutWrapper* layoutWrapper, SizeF& frameSize); 53 54 static Alignment MapLocalizedToAlignment(std::string localizedAlignment); 55 56 static void CalcSingleSideMarginFrame( 57 MarginPropertyF& margin, const OptionalSizeF& singleSideFrame, float& maxWidth, float& maxHeight); 58 protected: 59 std::list<RefPtr<LayoutWrapper>> layoutPolicyChildren_; 60 61 private: 62 ACE_DISALLOW_COPY_AND_MOVE(BoxLayoutAlgorithm); 63 }; 64 } // namespace OHOS::Ace::NG 65 66 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_LAYOUTS_BOX_LAYOUT_ALGORITHM_H 67