xfa/fde/tto/fde_textout.h

// Copyright 2014 PDFium Authors. All rights reserved.
// 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_FDE_TTO_FDE_TEXTOUT_H_
#define XFA_FDE_TTO_FDE_TEXTOUT_H_

#include "core/fxge/include/fx_dib.h"
#include "core/fxge/include/fx_ge.h"
#include "xfa/fde/fde_object.h"
#include "xfa/fgas/crt/fgas_utils.h"
#include "xfa/fgas/font/fgas_font.h"
#include "xfa/fgas/layout/fgas_textbreak.h"

#define FDE_TTOSTYLE_Underline 0x0001
#define FDE_TTOSTYLE_Strikeout 0x0002
#define FDE_TTOSTYLE_VerticalLayout 0x0004
#define FDE_TTOSTYLE_SingleLine 0x0010
#define FDE_TTOSTYLE_ExpandTab 0x0020
#define FDE_TTOSTYLE_HotKey 0x0040
#define FDE_TTOSTYLE_Ellipsis 0x0080
#define FDE_TTOSTYLE_LineWrap 0x0100
#define FDE_TTOSTYLE_ArabicShapes 0x0200
#define FDE_TTOSTYLE_RTL 0x0400
#define FDE_TTOSTYLE_ArabicContext 0x0800
#define FDE_TTOSTYLE_LastLineHeight 0x1000
#define FDE_TTOALIGNMENT_TopLeft 0
#define FDE_TTOALIGNMENT_TopCenter 1
#define FDE_TTOALIGNMENT_TopRight 2
#define FDE_TTOALIGNMENT_TopAuto 3
#define FDE_TTOALIGNMENT_CenterLeft 4
#define FDE_TTOALIGNMENT_Center 5
#define FDE_TTOALIGNMENT_CenterRight 6
#define FDE_TTOALIGNMENT_CenterAuto 7
#define FDE_TTOALIGNMENT_BottomLeft 8
#define FDE_TTOALIGNMENT_BottomCenter 9
#define FDE_TTOALIGNMENT_BottomRight 10
#define FDE_TTOALIGNMENT_BottomAuto 11

class CFDE_RenderDevice;
class CFX_TxtBreak;

struct FDE_TTOPIECE {
  int32_t iStartChar;
  int32_t iChars;
  uint32_t dwCharStyles;
  CFX_RectF rtPiece;
};
typedef CFX_MassArrayTemplate<FDE_TTOPIECE> CFDE_TTOPieceArray;

class CFDE_TTOLine : public CFX_Target {
 public:
  CFDE_TTOLine();
  CFDE_TTOLine(const CFDE_TTOLine& ttoLine);
  ~CFDE_TTOLine();
  int32_t AddPiece(int32_t index, const FDE_TTOPIECE& ttoPiece);
  int32_t GetSize() const;
  FDE_TTOPIECE* GetPtrAt(int32_t index);
  void RemoveLast(int32_t iCount);
  void RemoveAll(FX_BOOL bLeaveMemory);

  FX_BOOL m_bNewReload;
  CFDE_TTOPieceArray m_pieces;

 protected:
  int32_t m_iPieceCount;
};
typedef CFX_ObjectMassArrayTemplate<CFDE_TTOLine> CFDE_TTOLineArray;

class CFDE_TextOut : public CFX_Target {
 public:
  CFDE_TextOut();
  ~CFDE_TextOut();

  void Release() { delete this; }
  void SetFont(IFX_Font* pFont);
  void SetFontSize(FX_FLOAT fFontSize);
  void SetTextColor(FX_ARGB color);
  void SetStyles(uint32_t dwStyles);
  void SetTabWidth(FX_FLOAT fTabWidth);
  void SetEllipsisString(const CFX_WideString& wsEllipsis);
  void SetParagraphBreakChar(FX_WCHAR wch);
  void SetAlignment(int32_t iAlignment);
  void SetLineSpace(FX_FLOAT fLineSpace);
  void SetDIBitmap(CFX_DIBitmap* pDIB);
  void SetRenderDevice(CFX_RenderDevice* pDevice);
  void SetClipRect(const CFX_Rect& rtClip);
  void SetClipRect(const CFX_RectF& rtClip);
  void SetMatrix(const CFX_Matrix& matrix);
  void SetLineBreakTolerance(FX_FLOAT fTolerance);
  void CalcSize(const FX_WCHAR* pwsStr, int32_t iLength, CFX_Size& size);
  void CalcSize(const FX_WCHAR* pwsStr, int32_t iLength, CFX_SizeF& size);
  void CalcSize(const FX_WCHAR* pwsStr, int32_t iLength, CFX_Rect& rect);
  void CalcSize(const FX_WCHAR* pwsStr, int32_t iLength, CFX_RectF& rect);

  void DrawText(const FX_WCHAR* pwsStr, int32_t iLength, int32_t x, int32_t y);
  void DrawText(const FX_WCHAR* pwsStr,
                int32_t iLength,
                FX_FLOAT x,
                FX_FLOAT y);
  void DrawText(const FX_WCHAR* pwsStr, int32_t iLength, const CFX_Rect& rect);
  void DrawText(const FX_WCHAR* pwsStr, int32_t iLength, const CFX_RectF& rect);

  void SetLogicClipRect(const CFX_RectF& rtClip);
  void CalcLogicSize(const FX_WCHAR* pwsStr, int32_t iLength, CFX_SizeF& size);
  void CalcLogicSize(const FX_WCHAR* pwsStr, int32_t iLength, CFX_RectF& rect);
  void DrawLogicText(const FX_WCHAR* pwsStr,
                     int32_t iLength,
                     FX_FLOAT x,
                     FX_FLOAT y);
  void DrawLogicText(const FX_WCHAR* pwsStr,
                     int32_t iLength,
                     const CFX_RectF& rect);
  int32_t GetTotalLines();

 protected:
  void CalcTextSize(const FX_WCHAR* pwsStr, int32_t iLength, CFX_RectF& rect);
  FX_BOOL RetrieveLineWidth(uint32_t dwBreakStatus,
                            FX_FLOAT& fStartPos,
                            FX_FLOAT& fWidth,
                            FX_FLOAT& fHeight);
  void SetLineWidth(CFX_RectF& rect);
  void DrawText(const FX_WCHAR* pwsStr,
                int32_t iLength,
                const CFX_RectF& rect,
                const CFX_RectF& rtClip);
  void LoadText(const FX_WCHAR* pwsStr, int32_t iLength, const CFX_RectF& rect);
  void LoadEllipsis();
  void ExpandBuffer(int32_t iSize, int32_t iType);
  void RetrieveEllPieces(int32_t*& pCharWidths);

  void Reload(const CFX_RectF& rect);
  void ReloadLinePiece(CFDE_TTOLine* pLine, const CFX_RectF& rect);
  FX_BOOL RetriecePieces(uint32_t dwBreakStatus,
                         int32_t& iStartChar,
                         int32_t& iPieceWidths,
                         FX_BOOL bReload,
                         const CFX_RectF& rect);
  void AppendPiece(const FDE_TTOPIECE& ttoPiece,
                   FX_BOOL bNeedReload,
                   FX_BOOL bEnd);
  void ReplaceWidthEllipsis();
  void DoAlignment(const CFX_RectF& rect);
  void OnDraw(const CFX_RectF& rtClip);
  int32_t GetDisplayPos(FDE_TTOPIECE* pPiece);
  int32_t GetCharRects(const FDE_TTOPIECE* pPiece);

  FX_TXTRUN ToTextRun(const FDE_TTOPIECE* pPiece);
  void DrawLine(const FDE_TTOPIECE* pPiece, CFDE_Pen*& pPen);

  CFX_TxtBreak* m_pTxtBreak;
  IFX_Font* m_pFont;
  FX_FLOAT m_fFontSize;
  FX_FLOAT m_fLineSpace;
  FX_FLOAT m_fLinePos;
  FX_FLOAT m_fTolerance;
  int32_t m_iAlignment;
  int32_t m_iTxtBkAlignment;
  int32_t* m_pCharWidths;
  int32_t m_iChars;
  int32_t* m_pEllCharWidths;
  int32_t m_iEllChars;
  FX_WCHAR m_wParagraphBkChar;
  FX_ARGB m_TxtColor;
  uint32_t m_dwStyles;
  uint32_t m_dwTxtBkStyles;
  CFX_WideString m_wsEllipsis;
  FX_BOOL m_bElliChanged;
  int32_t m_iEllipsisWidth;
  CFX_WideString m_wsText;
  CFX_RectF m_rtClip;
  CFX_RectF m_rtLogicClip;
  CFX_Matrix m_Matrix;
  CFDE_TTOLineArray m_ttoLines;
  int32_t m_iCurLine;
  int32_t m_iCurPiece;
  int32_t m_iTotalLines;
  FXTEXT_CHARPOS* m_pCharPos;
  int32_t m_iCharPosSize;
  CFDE_RenderDevice* m_pRenderDevice;
  CFX_Int32Array m_hotKeys;
  CFX_RectFArray m_rectArray;
};

#endif  // XFA_FDE_TTO_FDE_TEXTOUT_H_