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      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_FGAS_LAYOUT_CFX_RTFBREAK_H_
      8 #define XFA_FGAS_LAYOUT_CFX_RTFBREAK_H_
      9 
     10 #include <deque>
     11 #include <vector>
     12 
     13 #include "core/fxcrt/fx_coordinates.h"
     14 #include "core/fxcrt/fx_unicode.h"
     15 #include "core/fxcrt/retain_ptr.h"
     16 #include "xfa/fgas/layout/cfx_break.h"
     17 #include "xfa/fxfa/cxfa_textuserdata.h"
     18 
     19 class CFGAS_GEFont;
     20 class FXTEXT_CHARPOS;
     21 
     22 enum class CFX_RTFLineAlignment {
     23   Left = 0,
     24   Center,
     25   Right,
     26   Justified,
     27   Distributed
     28 };
     29 
     30 struct FX_RTFTEXTOBJ {
     31   FX_RTFTEXTOBJ();
     32   ~FX_RTFTEXTOBJ();
     33 
     34   WideString pStr;
     35   std::vector<int32_t> pWidths;
     36   RetainPtr<CFGAS_GEFont> pFont;
     37   const CFX_RectF* pRect;
     38   wchar_t wLineBreakChar;
     39   float fFontSize;
     40   int32_t iLength;
     41   int32_t iBidiLevel;
     42   int32_t iHorizontalScale;
     43   int32_t iVerticalScale;
     44 };
     45 
     46 class CFX_RTFBreak : public CFX_Break {
     47  public:
     48   explicit CFX_RTFBreak(uint32_t dwLayoutStyles);
     49   ~CFX_RTFBreak() override;
     50 
     51   void SetLineStartPos(float fLinePos);
     52 
     53   void SetAlignment(CFX_RTFLineAlignment align) { m_iAlignment = align; }
     54   void SetUserData(const RetainPtr<CXFA_TextUserData>& pUserData);
     55 
     56   void AddPositionedTab(float fTabPos);
     57 
     58   CFX_BreakType EndBreak(CFX_BreakType dwStatus);
     59 
     60   int32_t GetDisplayPos(const FX_RTFTEXTOBJ* pText,
     61                         FXTEXT_CHARPOS* pCharPos,
     62                         bool bCharCode) const;
     63 
     64   CFX_BreakType AppendChar(wchar_t wch);
     65 
     66   CFX_BreakLine* GetCurrentLineForTesting() const { return m_pCurLine; }
     67 
     68  private:
     69   void AppendChar_Combination(CFX_Char* pCurChar);
     70   void AppendChar_Tab(CFX_Char* pCurChar);
     71   CFX_BreakType AppendChar_Control(CFX_Char* pCurChar);
     72   CFX_BreakType AppendChar_Arabic(CFX_Char* pCurChar);
     73   CFX_BreakType AppendChar_Others(CFX_Char* pCurChar);
     74   int32_t GetLastPositionedTab() const;
     75   bool GetPositionedTab(int32_t* iTabPos) const;
     76 
     77   int32_t GetBreakPos(std::vector<CFX_Char>& tca,
     78                       int32_t& iEndPos,
     79                       bool bAllChars,
     80                       bool bOnlyBrk);
     81   void SplitTextLine(CFX_BreakLine* pCurLine,
     82                      CFX_BreakLine* pNextLine,
     83                      bool bAllChars);
     84   bool EndBreak_SplitLine(CFX_BreakLine* pNextLine,
     85                           bool bAllChars,
     86                           CFX_BreakType dwStatus);
     87   void EndBreak_BidiLine(std::deque<FX_TPO>* tpos, CFX_BreakType dwStatus);
     88   void EndBreak_Alignment(const std::deque<FX_TPO>& tpos,
     89                           bool bAllChars,
     90                           CFX_BreakType dwStatus);
     91 
     92   bool m_bPagination;
     93   std::vector<int32_t> m_PositionedTabs;
     94   CFX_RTFLineAlignment m_iAlignment;
     95   RetainPtr<CXFA_TextUserData> m_pUserData;
     96 };
     97 
     98 #endif  // XFA_FGAS_LAYOUT_CFX_RTFBREAK_H_
     99