1 /* 2 * Copyright (c) 2023 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_STACK_STACK_LAYOUT_ALGORITHM_H 17 #define FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERN_STACK_STACK_LAYOUT_ALGORITHM_H 18 19 #include "core/components_ng/base/frame_node.h" 20 #include "core/components/common/properties/alignment.h" 21 #include "core/components_ng/layout/box_layout_algorithm.h" 22 #include "core/pipeline_ng/pipeline_context.h" 23 24 namespace OHOS::Ace::NG { 25 26 class ACE_EXPORT StackLayoutAlgorithm : public BoxLayoutAlgorithm { 27 DECLARE_ACE_TYPE(StackLayoutAlgorithm, BoxLayoutAlgorithm); 28 29 public: 30 StackLayoutAlgorithm(); 31 ~StackLayoutAlgorithm() override = default; 32 33 void Layout(LayoutWrapper* layoutWrapper) override; 34 35 private: 36 // calculate stack alignment 37 static NG::OffsetF CalculateStackAlignment( 38 const NG::SizeF& parentSize, const NG::SizeF& childSize, const Alignment& alignment); 39 static void PerformLayout(LayoutWrapper* layoutWrapper); 40 ACE_DISALLOW_COPY_AND_MOVE(StackLayoutAlgorithm); 41 }; 42 } // namespace OHOS::Ace::NG 43 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERN_STACK_STACK_LAYOUT_ALGORITHM_H 44