| // Copyright 2017 The PDFium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| |
| #ifndef XFA_FXFA_CXFA_TEXTLAYOUT_H_ |
| #define XFA_FXFA_CXFA_TEXTLAYOUT_H_ |
| |
| #include <memory> |
| #include <vector> |
| |
| #include "core/fxcrt/css/cfx_css.h" |
| #include "core/fxcrt/fx_coordinates.h" |
| #include "core/fxcrt/retain_ptr.h" |
| #include "core/fxcrt/unowned_ptr.h" |
| #include "core/fxcrt/widestring.h" |
| #include "core/fxge/dib/fx_dib.h" |
| #include "fxjs/gc/heap.h" |
| #include "v8/include/cppgc/garbage-collected.h" |
| #include "v8/include/cppgc/member.h" |
| #include "v8/include/cppgc/visitor.h" |
| #include "xfa/fgas/layout/cfgas_char.h" |
| #include "xfa/fgas/layout/cfgas_textpiece.h" |
| #include "xfa/fxfa/fxfa_basic.h" |
| |
| class CFGAS_LinkUserData; |
| class CFGAS_RTFBreak; |
| class CFX_CSSComputedStyle; |
| class CFX_RenderDevice; |
| class CFX_XMLNode; |
| class CXFA_FFDoc; |
| class CXFA_Node; |
| class CXFA_TextParser; |
| class CXFA_TextProvider; |
| class CXFA_TextTabstopsContext; |
| class TextCharPos; |
| |
| class CXFA_TextLayout final : public cppgc::GarbageCollected<CXFA_TextLayout> { |
| public: |
| CONSTRUCT_VIA_MAKE_GARBAGE_COLLECTED; |
| ~CXFA_TextLayout(); |
| |
| void Trace(cppgc::Visitor* visitor) const; |
| |
| float GetLayoutHeight(); |
| float StartLayout(float fWidth); |
| float DoLayout(float fTextHeight); |
| float DoSplitLayout(size_t szBlockIndex, |
| float fCalcHeight, |
| float fTextHeight); |
| float Layout(const CFX_SizeF& size); |
| |
| CFX_SizeF CalcSize(const CFX_SizeF& minSize, const CFX_SizeF& maxSize); |
| void ItemBlocks(const CFX_RectF& rtText, size_t szBlockIndex); |
| bool DrawString(CFX_RenderDevice* pFxDevice, |
| const CFX_Matrix& mtDoc2Device, |
| const CFX_RectF& rtClip, |
| size_t szBlockIndex); |
| bool IsLoaded() const { return !m_pieceLines.empty(); } |
| void Unload(); |
| bool HasBlock() const { return m_bHasBlock; } |
| void ClearBlocks() { m_Blocks.clear(); } |
| void ResetHasBlock() { m_bHasBlock = false; } |
| |
| // Returns empty string when no link is present. |
| WideString GetLinkURLAtPoint(const CFX_PointF& point); |
| |
| private: |
| class TextPiece : public CFGAS_TextPiece { |
| public: |
| TextPiece(); |
| ~TextPiece(); |
| |
| int32_t iUnderline = 0; |
| int32_t iLineThrough = 0; |
| XFA_AttributeValue iPeriod = XFA_AttributeValue::All; |
| FX_ARGB dwColor = 0; |
| RetainPtr<CFGAS_LinkUserData> pLinkData; |
| }; |
| |
| class PieceLine { |
| public: |
| PieceLine(); |
| ~PieceLine(); |
| |
| std::vector<std::unique_ptr<TextPiece>> m_textPieces; |
| std::vector<size_t> m_charCounts; |
| }; |
| |
| struct BlockData { |
| size_t szIndex; |
| size_t szLength; |
| }; |
| |
| struct BlockHeight { |
| size_t szBlockIndex; |
| float fHeight; |
| }; |
| |
| struct LoaderContext : public cppgc::GarbageCollected<LoaderContext> { |
| LoaderContext(); |
| ~LoaderContext(); |
| |
| void Trace(cppgc::Visitor* visitor) const; |
| |
| bool bSaveLineHeight = false; |
| bool bFilterSpace = false; |
| float fWidth = 0; |
| float fHeight = 0; |
| float fLastPos = 0; |
| float fStartLineOffset = 0; |
| size_t nCharIdx = 0; |
| // TODO(thestig): Make this size_t? |
| int32_t iTotalLines = -1; |
| UnownedPtr<const CFX_XMLNode> pXMLNode; |
| RetainPtr<CFX_CSSComputedStyle> pParentStyle; |
| cppgc::Member<CXFA_Node> pNode; |
| std::vector<float> lineHeights; |
| std::vector<BlockHeight> blockHeights; |
| }; |
| |
| CXFA_TextLayout(CXFA_FFDoc* doc, CXFA_TextProvider* pTextProvider); |
| |
| void GetTextDataNode(); |
| CFX_XMLNode* GetXMLContainerNode(); |
| std::unique_ptr<CFGAS_RTFBreak> CreateBreak(bool bDefault); |
| void InitBreak(float fLineWidth); |
| void InitBreak(CFX_CSSComputedStyle* pStyle, |
| CFX_CSSDisplay eDisplay, |
| float fLineWidth, |
| const CFX_XMLNode* pXMLNode, |
| CFX_CSSComputedStyle* pParentStyle); |
| void Loader(float textWidth, float* pLinePos, bool bSavePieces); |
| void LoadText(CXFA_Node* pNode, |
| float textWidth, |
| float* pLinePos, |
| bool bSavePieces); |
| bool LoadRichText(const CFX_XMLNode* pXMLNode, |
| float textWidth, |
| float* pLinePos, |
| RetainPtr<CFX_CSSComputedStyle> pParentStyle, |
| bool bSavePieces, |
| RetainPtr<CFGAS_LinkUserData> pLinkData, |
| bool bEndBreak, |
| bool bIsOl, |
| int32_t iLiCount); |
| bool AppendChar(const WideString& wsText, |
| float* pLinePos, |
| float fSpaceAbove, |
| bool bSavePieces); |
| void AppendTextLine(CFGAS_Char::BreakType dwStatus, |
| float* pLinePos, |
| bool bSavePieces, |
| bool bEndBreak); |
| void EndBreak(CFGAS_Char::BreakType dwStatus, float* pLinePos, bool bDefault); |
| bool IsEnd(bool bSavePieces); |
| void UpdateAlign(float fHeight, float fBottom); |
| void RenderString(CFX_RenderDevice* pDevice, |
| PieceLine* pPieceLine, |
| size_t szPiece, |
| std::vector<TextCharPos>* pCharPos, |
| const CFX_Matrix& mtDoc2Device); |
| void RenderPath(CFX_RenderDevice* pDevice, |
| const PieceLine* pPieceLine, |
| size_t szPiece, |
| std::vector<TextCharPos>* pCharPos, |
| const CFX_Matrix& mtDoc2Device); |
| size_t GetDisplayPos(const TextPiece* pPiece, |
| std::vector<TextCharPos>* pCharPos); |
| void DoTabstops(CFX_CSSComputedStyle* pStyle, PieceLine* pPieceLine); |
| bool LayoutInternal(size_t szBlockIndex); |
| size_t CountBlocks() const; |
| size_t GetNextIndexFromLastBlockData() const; |
| void UpdateLoaderHeight(float fTextHeight); |
| |
| bool m_bHasBlock = false; |
| bool m_bRichText = false; |
| int32_t m_iLines = 0; |
| float m_fMaxWidth = 0; |
| std::vector<BlockData> m_Blocks; |
| cppgc::Member<CXFA_FFDoc> const m_pDoc; |
| cppgc::Member<CXFA_TextProvider> const m_pTextProvider; |
| cppgc::Member<CXFA_Node> m_pTextDataNode; |
| cppgc::Member<CXFA_TextParser> m_pTextParser; |
| cppgc::Member<LoaderContext> m_pLoader; |
| std::unique_ptr<CFGAS_RTFBreak> m_pBreak; |
| std::vector<std::unique_ptr<PieceLine>> m_pieceLines; |
| std::unique_ptr<CXFA_TextTabstopsContext> m_pTabstopContext; |
| }; |
| |
| #endif // XFA_FXFA_CXFA_TEXTLAYOUT_H_ |