1 // Copyright 2014 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #ifndef XFA_FXFA_PARSER_CXFA_ITEMLAYOUTPROCESSOR_H_ 8 #define XFA_FXFA_PARSER_CXFA_ITEMLAYOUTPROCESSOR_H_ 9 10 #include <float.h> 11 12 #include <list> 13 #include <map> 14 #include <tuple> 15 #include <vector> 16 17 #include "core/fxcrt/fx_coordinates.h" 18 #include "xfa/fxfa/fxfa_basic.h" 19 20 #define XFA_LAYOUT_INVALIDNODE ((CXFA_Node*)(intptr_t)-1) 21 #define XFA_LAYOUT_FLOAT_PERCISION (0.0005f) 22 23 class CXFA_ContainerLayoutItem; 24 class CXFA_ContentLayoutItem; 25 class CXFA_ItemLayoutProcessor; 26 class CXFA_LayoutContext; 27 class CXFA_LayoutPageMgr; 28 class CXFA_LayoutProcessor; 29 class CXFA_Node; 30 31 enum class XFA_ItemLayoutProcessorResult { 32 Done, 33 PageFullBreak, 34 RowFullBreak, 35 ManualBreak, 36 }; 37 38 enum class XFA_ItemLayoutProcessorStages { 39 None, 40 BookendLeader, 41 BreakBefore, 42 Keep, 43 Container, 44 BreakAfter, 45 BookendTrailer, 46 Done, 47 }; 48 49 bool XFA_ItemLayoutProcessor_IsTakingSpace(CXFA_Node* pNode); 50 51 class CXFA_ItemLayoutProcessor { 52 public: 53 static bool IncrementRelayoutNode(CXFA_LayoutProcessor* pLayoutProcessor, 54 CXFA_Node* pNode, 55 CXFA_Node* pParentNode); 56 57 CXFA_ItemLayoutProcessor(CXFA_Node* pNode, CXFA_LayoutPageMgr* pPageMgr); 58 ~CXFA_ItemLayoutProcessor(); 59 60 XFA_ItemLayoutProcessorResult DoLayout(bool bUseBreakControl, 61 float fHeightLimit, 62 float fRealHeight, 63 CXFA_LayoutContext* pContext); 64 void DoLayoutPageArea(CXFA_ContainerLayoutItem* pPageAreaLayoutItem); 65 66 CFX_SizeF GetCurrentComponentSize(); 67 CXFA_Node* GetFormNode() { return m_pFormNode; } 68 bool HasLayoutItem() const { return !!m_pLayoutItem; } 69 CXFA_ContentLayoutItem* ExtractLayoutItem(); 70 void SplitLayoutItem(float fSplitPos); 71 72 float FindSplitPos(float fProposedSplitPos); 73 74 bool ProcessKeepForSplit( 75 CXFA_ItemLayoutProcessor* pParentProcessor, 76 CXFA_ItemLayoutProcessor* pChildProcessor, 77 XFA_ItemLayoutProcessorResult eRetValue, 78 std::vector<CXFA_ContentLayoutItem*>* rgCurLineLayoutItem, 79 float* fContentCurRowAvailWidth, 80 float* fContentCurRowHeight, 81 float* fContentCurRowY, 82 bool* bAddedItemInRow, 83 bool* bForceEndPage, 84 XFA_ItemLayoutProcessorResult* result); 85 void ProcessUnUseOverFlow(CXFA_Node* pLeaderNode, 86 CXFA_Node* pTrailerNode, 87 CXFA_ContentLayoutItem* pTrailerItem, 88 CXFA_Node* pFormNode); 89 bool IsAddNewRowForTrailer(CXFA_ContentLayoutItem* pTrailerItem); 90 bool JudgeLeaderOrTrailerForOccur(CXFA_Node* pFormNode); 91 92 CXFA_ContentLayoutItem* CreateContentLayoutItem(CXFA_Node* pFormNode); 93 94 CXFA_Node* m_pFormNode; 95 CXFA_ContentLayoutItem* m_pLayoutItem; 96 CXFA_Node* m_pCurChildNode; 97 float m_fUsedSize; 98 CXFA_LayoutPageMgr* m_pPageMgr; 99 std::list<CXFA_Node*> m_PendingNodes; 100 bool m_bBreakPending; 101 std::vector<float> m_rgSpecifiedColumnWidths; 102 std::vector<CXFA_ContentLayoutItem*> m_arrayKeepItems; 103 float m_fLastRowWidth; 104 float m_fLastRowY; 105 bool m_bUseInheriated; 106 XFA_ItemLayoutProcessorResult m_ePreProcessRs; 107 108 private: 109 void SetCurrentComponentPos(const CFX_PointF& pos); 110 void SetCurrentComponentSize(const CFX_SizeF& size); 111 112 void SplitLayoutItem(CXFA_ContentLayoutItem* pLayoutItem, 113 CXFA_ContentLayoutItem* pSecondParent, 114 float fSplitPos); 115 float InsertKeepLayoutItems(); 116 bool CalculateRowChildPosition( 117 std::vector<CXFA_ContentLayoutItem*> (&rgCurLineLayoutItems)[3], 118 XFA_AttributeEnum eFlowStrategy, 119 bool bContainerHeightAutoSize, 120 bool bContainerWidthAutoSize, 121 float* fContentCalculatedWidth, 122 float* fContentCalculatedHeight, 123 float* fContentCurRowY, 124 float fContentCurRowHeight, 125 float fContentWidthLimit, 126 bool bRootForceTb); 127 void ProcessUnUseBinds(CXFA_Node* pFormNode); 128 bool JudgePutNextPage(CXFA_ContentLayoutItem* pParentLayoutItem, 129 float fChildHeight, 130 std::vector<CXFA_ContentLayoutItem*>* pKeepItems); 131 132 void DoLayoutPositionedContainer(CXFA_LayoutContext* pContext); 133 void DoLayoutTableContainer(CXFA_Node* pLayoutNode); 134 XFA_ItemLayoutProcessorResult DoLayoutFlowedContainer( 135 bool bUseBreakControl, 136 XFA_AttributeEnum eFlowStrategy, 137 float fHeightLimit, 138 float fRealHeight, 139 CXFA_LayoutContext* pContext, 140 bool bRootForceTb); 141 void DoLayoutField(); 142 143 void GotoNextContainerNode(CXFA_Node*& pCurActionNode, 144 XFA_ItemLayoutProcessorStages& nCurStage, 145 CXFA_Node* pParentContainer, 146 bool bUsePageBreak); 147 148 bool ProcessKeepNodesForCheckNext(CXFA_Node*& pCurActionNode, 149 XFA_ItemLayoutProcessorStages& nCurStage, 150 CXFA_Node*& pNextContainer, 151 bool& bLastKeepNode); 152 153 bool ProcessKeepNodesForBreakBefore(CXFA_Node*& pCurActionNode, 154 XFA_ItemLayoutProcessorStages& nCurStage, 155 CXFA_Node* pContainerNode); 156 157 CXFA_Node* GetSubformSetParent(CXFA_Node* pSubformSet); 158 159 bool m_bKeepBreakFinish; 160 bool m_bIsProcessKeep; 161 CXFA_Node* m_pKeepHeadNode; 162 CXFA_Node* m_pKeepTailNode; 163 CXFA_ContentLayoutItem* m_pOldLayoutItem; 164 CXFA_ItemLayoutProcessor* m_pCurChildPreprocessor; 165 XFA_ItemLayoutProcessorStages m_nCurChildNodeStage; 166 std::map<CXFA_Node*, int32_t> m_PendingNodesCount; 167 float m_fWidthLimite; 168 bool m_bHasAvailHeight; 169 }; 170 171 #endif // XFA_FXFA_PARSER_CXFA_ITEMLAYOUTPROCESSOR_H_ 172
