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_WRAP_WRAP_LAYOUT_ALGORITHM_H 17 #define FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERN_WRAP_WRAP_LAYOUT_ALGORITHM_H 18 19 #include <string> 20 21 #include "base/geometry/ng/size_t.h" 22 #include "core/components/common/layout/constants.h" 23 #include "core/components_ng/base/frame_node.h" 24 #include "core/components_ng/base/geometry_node.h" 25 #include "core/components_ng/layout/layout_algorithm.h" 26 #include "core/components_ng/layout/layout_wrapper.h" 27 #include "core/components_ng/pattern/flex/flex_layout_algorithm.h" 28 #include "core/components_ng/pattern/flex/flex_layout_styles.h" 29 #include "core/components_ng/pattern/text/text_layout_property.h" 30 31 namespace OHOS::Ace::NG { 32 33 struct ContentInfo { ContentInfoContentInfo34 ContentInfo(float main, float cross, int32_t total, const std::list<RefPtr<LayoutWrapper>>& nodeList) 35 : mainLength(main), crossLength(cross), count(total), itemList(nodeList) 36 {} 37 38 float mainLength = 0.0f; 39 float crossLength = 0.0f; 40 int32_t count = 0; 41 std::list<RefPtr<LayoutWrapper>> itemList; 42 float spaceBetween = 0.0f; 43 float maxBaselineDistance = 0.0f; 44 ToStringContentInfo45 std::string ToString() const 46 { 47 std::string result; 48 result.append("main length: "); 49 result.append(std::to_string(mainLength)); 50 result.append(", cross length: "); 51 result.append(std::to_string(crossLength)); 52 result.append(", space between: "); 53 result.append(std::to_string(spaceBetween)); 54 result.append(", child count "); 55 result.append(std::to_string(count)); 56 result.append(", max baseline distance "); 57 result.append(std::to_string(maxBaselineDistance)); 58 return result; 59 } 60 }; 61 62 class ACE_EXPORT WrapLayoutAlgorithm : public LayoutAlgorithm { 63 DECLARE_ACE_TYPE(WrapLayoutAlgorithm, LayoutAlgorithm); 64 65 public: 66 WrapLayoutAlgorithm() = default; WrapLayoutAlgorithm(bool stretch)67 explicit WrapLayoutAlgorithm(bool stretch) : isDialogStretch_(stretch) {}; 68 ~WrapLayoutAlgorithm() override = default; 69 70 void Measure(LayoutWrapper* layoutWrapper) override; 71 72 void Layout(LayoutWrapper* layoutWrapper) override; 73 74 private: 75 void PerformLayoutInitialize(const RefPtr<LayoutProperty>& layoutProp); 76 void HandleDialogStretch(); 77 SizeF GetLeftSize(float crossLength, float mainLeftLength, float crossLeftLength); 78 void LayoutWholeWrap( 79 OffsetF& startPosition, OffsetF& spaceBetweenContentsOnCrossAxis, LayoutWrapper* layoutWrapper); 80 81 float GetItemMainAxisLength(const RefPtr<GeometryNode>& item) const; 82 float GetItemCrossAxisLength(const RefPtr<GeometryNode>& item) const; 83 float GetMainAxisLengthOfSize(const SizeF& size) const; 84 float GetCrossAxisLengthOfSize(const SizeF& size) const; 85 float GetMainAxisOffset(const OffsetF& offset) const; 86 float GetCrossAxisOffset(const OffsetF& offset) const; 87 SizeF GetMainAxisRemainSpace(float totalMainLength) const; 88 SizeF GetCrossAxisRemainSpace(float totalCrossLength) const; 89 90 void CalcItemMainAxisStartAndSpaceBetween( 91 OffsetF& startPosition, OffsetF& spaceBetweenItemsOnMainAxis, const ContentInfo& content); 92 float CalcItemCrossAxisOffset( 93 const ContentInfo& content, const OffsetF& contentOffset, const RefPtr<GeometryNode>& node); 94 95 void StretchItemsInContent(LayoutWrapper* layoutWrapper, const ContentInfo& content); 96 void TraverseContent(const OffsetF& startPosition, const OffsetF& spaceBetweenContentsOnCrossAxis); 97 OffsetF GetItemMainOffset(float mainSpace) const; 98 void LayoutContent(const ContentInfo& content, const OffsetF& position); 99 100 void AddExtraSpaceToStartPosition(OffsetF& startPosition, float extraSpace, bool onMainAxis) const; 101 void AddPaddingToStartPosition(OffsetF& startPosition) const; 102 void GetFlexItemProperties(const ContentInfo& content, FlexItemProperties& flexItemProperties); 103 void CalcFlexGrowLayout( 104 const RefPtr<LayoutWrapper>& itemWrapper, const FlexItemProperties& flexItemProperties, float remainSpace); 105 106 WrapDirection direction_ = WrapDirection::VERTICAL; 107 WrapAlignment alignment_ = WrapAlignment::START; 108 WrapAlignment mainAlignment_ = WrapAlignment::START; 109 WrapAlignment crossAlignment_ = WrapAlignment::START; 110 111 bool isHorizontal_ = true; 112 bool isReverse_ = false; 113 bool isDialogStretch_ = false; 114 float totalMainLength_ = 0.0f; 115 float totalCrossLength_ = 0.0f; 116 Dimension spacing_; 117 Dimension contentSpace_; 118 SizeF constraintMaxSize_; 119 PaddingPropertyF padding_; 120 SizeF frameSize_; 121 OffsetF frameOffset_; 122 bool hasIdealWidth_ = false; 123 bool hasIdealHeight_ = false; 124 125 // Should be clear after Layout. 126 std::list<ContentInfo> contentList_; 127 128 float mainLengthLimit_ = 0.0f; 129 float crossLengthLimit_ = 0.0f; 130 float currentMainLength_ = 0.0f; 131 std::list<RefPtr<LayoutWrapper>> outOfLayoutChildren_; 132 133 ACE_DISALLOW_COPY_AND_MOVE(WrapLayoutAlgorithm); 134 }; 135 } // namespace OHOS::Ace::NG 136 137 #endif // FOUNDATION_ACE_FRAMEWORKS_CORE_COMPONENTS_NG_PATTERN_WRAP_WRAP_LAYOUT_ALGORITHM_H 138