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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_TXTBREAK_H_
      8 #define XFA_FGAS_LAYOUT_CFX_TXTBREAK_H_
      9 
     10 #include <deque>
     11 #include <memory>
     12 #include <vector>
     13 
     14 #include "core/fxcrt/cfx_char.h"
     15 #include "core/fxge/cfx_renderdevice.h"
     16 #include "third_party/base/stl_util.h"
     17 #include "xfa/fgas/layout/cfx_break.h"
     18 
     19 class CFDE_TextEditEngine;
     20 class CFGAS_GEFont;
     21 struct FDE_TEXTEDITPIECE;
     22 
     23 #define FX_TXTCHARSTYLE_ArabicShadda 0x0020
     24 #define FX_TXTCHARSTYLE_OddBidiLevel 0x0040
     25 
     26 enum CFX_TxtLineAlignment {
     27   CFX_TxtLineAlignment_Left = 0,
     28   CFX_TxtLineAlignment_Center = 1 << 0,
     29   CFX_TxtLineAlignment_Right = 1 << 1,
     30   CFX_TxtLineAlignment_Justified = 1 << 2
     31 };
     32 
     33 inline bool CFX_BreakTypeNoneOrPiece(CFX_BreakType type) {
     34   return type == CFX_BreakType::None || type == CFX_BreakType::Piece;
     35 }
     36 
     37 struct FX_TXTRUN {
     38   FX_TXTRUN();
     39   FX_TXTRUN(const FX_TXTRUN& other);
     40   ~FX_TXTRUN();
     41 
     42   CFDE_TextEditEngine* pEdtEngine;
     43   const FDE_TEXTEDITPIECE* pIdentity;
     44   WideString wsStr;
     45   int32_t* pWidths;
     46   int32_t iLength;
     47   RetainPtr<CFGAS_GEFont> pFont;
     48   float fFontSize;
     49   uint32_t dwStyles;
     50   int32_t iHorizontalScale;
     51   int32_t iVerticalScale;
     52   uint32_t dwCharStyles;
     53   const CFX_RectF* pRect;
     54   bool bSkipSpace;
     55 };
     56 
     57 class CFX_TxtBreak : public CFX_Break {
     58  public:
     59   CFX_TxtBreak();
     60   ~CFX_TxtBreak() override;
     61 
     62   void SetLineWidth(float fLineWidth);
     63   void SetAlignment(int32_t iAlignment);
     64   void SetCombWidth(float fCombWidth);
     65   CFX_BreakType EndBreak(CFX_BreakType dwStatus);
     66 
     67   int32_t GetDisplayPos(const FX_TXTRUN* pTxtRun,
     68                         FXTEXT_CHARPOS* pCharPos) const;
     69   std::vector<CFX_RectF> GetCharRects(const FX_TXTRUN* pTxtRun,
     70                                       bool bCharBBox = false) const;
     71   CFX_BreakType AppendChar(wchar_t wch);
     72 
     73  private:
     74   void AppendChar_Combination(CFX_Char* pCurChar);
     75   void AppendChar_Tab(CFX_Char* pCurChar);
     76   CFX_BreakType AppendChar_Control(CFX_Char* pCurChar);
     77   CFX_BreakType AppendChar_Arabic(CFX_Char* pCurChar);
     78   CFX_BreakType AppendChar_Others(CFX_Char* pCurChar);
     79 
     80   void ResetContextCharStyles();
     81   bool EndBreak_SplitLine(CFX_BreakLine* pNextLine, bool bAllChars);
     82   void EndBreak_BidiLine(std::deque<FX_TPO>* tpos, CFX_BreakType dwStatus);
     83   void EndBreak_Alignment(const std::deque<FX_TPO>& tpos,
     84                           bool bAllChars,
     85                           CFX_BreakType dwStatus);
     86   int32_t GetBreakPos(std::vector<CFX_Char>& ca,
     87                       int32_t& iEndPos,
     88                       bool bAllChars = false,
     89                       bool bOnlyBrk = false);
     90   void SplitTextLine(CFX_BreakLine* pCurLine,
     91                      CFX_BreakLine* pNextLine,
     92                      bool bAllChars = false);
     93 
     94   int32_t m_iAlignment;
     95   int32_t m_iCombWidth;
     96 };
     97 
     98 #endif  // XFA_FGAS_LAYOUT_CFX_TXTBREAK_H_
     99