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// Copyright 2016 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 CORE_FPDFTEXT_CPDF_TEXTPAGE_H_
#define CORE_FPDFTEXT_CPDF_TEXTPAGE_H_
#include <deque>
#include <vector>
#include "core/fpdfapi/page/cpdf_pageobjectlist.h"
#include "core/fxcrt/fx_basic.h"
#include "core/fxcrt/fx_coordinates.h"
#include "core/fxcrt/fx_string.h"
class CPDF_Font;
class CPDF_FormObject;
class CPDF_Page;
class CPDF_TextObject;
#define FPDFTEXT_MATCHCASE 0x00000001
#define FPDFTEXT_MATCHWHOLEWORD 0x00000002
#define FPDFTEXT_CONSECUTIVE 0x00000004
#define FPDFTEXT_CHAR_ERROR -1
#define FPDFTEXT_CHAR_NORMAL 0
#define FPDFTEXT_CHAR_GENERATED 1
#define FPDFTEXT_CHAR_UNUNICODE 2
#define FPDFTEXT_CHAR_HYPHEN 3
#define FPDFTEXT_CHAR_PIECE 4
#define TEXT_SPACE_CHAR L' '
#define TEXT_LINEFEED_CHAR L'\n'
#define TEXT_RETURN_CHAR L'\r'
#define TEXT_EMPTY L""
#define TEXT_SPACE L" "
#define TEXT_RETURN_LINEFEED L"\r\n"
#define TEXT_LINEFEED L"\n"
#define TEXT_CHARRATIO_GAPDELTA 0.070
enum class FPDFText_MarkedContent { Pass = 0, Done, Delay };
enum class FPDFText_Direction { Left = -1, Right = 1 };
struct FPDF_CHAR_INFO {
FX_WCHAR m_Unicode;
FX_WCHAR m_Charcode;
int32_t m_Flag;
FX_FLOAT m_FontSize;
FX_FLOAT m_OriginX;
FX_FLOAT m_OriginY;
CFX_FloatRect m_CharBox;
CPDF_TextObject* m_pTextObj;
CFX_Matrix m_Matrix;
};
struct FPDF_SEGMENT {
int m_Start;
int m_nCount;
};
struct PAGECHAR_INFO {
int m_CharCode;
FX_WCHAR m_Unicode;
FX_FLOAT m_OriginX;
FX_FLOAT m_OriginY;
int32_t m_Flag;
CFX_FloatRect m_CharBox;
CPDF_TextObject* m_pTextObj;
CFX_Matrix m_Matrix;
int m_Index;
};
struct PDFTEXT_Obj {
CPDF_TextObject* m_pTextObj;
CFX_Matrix m_formMatrix;
};
class CPDF_TextPage {
public:
CPDF_TextPage(const CPDF_Page* pPage, FPDFText_Direction flags);
~CPDF_TextPage();
// IPDF_TextPage:
void ParseTextPage();
bool IsParsed() const { return m_bIsParsed; }
int CharIndexFromTextIndex(int TextIndex) const;
int TextIndexFromCharIndex(int CharIndex) const;
int CountChars() const;
void GetCharInfo(int index, FPDF_CHAR_INFO* info) const;
std::vector<CFX_FloatRect> GetRectArray(int start, int nCount) const;
int GetIndexAtPos(CFX_FloatPoint point,
FX_FLOAT xTolerance,
FX_FLOAT yTolerance) const;
int GetIndexAtPos(FX_FLOAT x,
FX_FLOAT y,
FX_FLOAT xTolerance,
FX_FLOAT yTolerance) const;
CFX_WideString GetTextByRect(const CFX_FloatRect& rect) const;
CFX_WideString GetPageText(int start = 0, int nCount = -1) const;
int CountRects(int start, int nCount);
void GetRect(int rectIndex,
FX_FLOAT& left,
FX_FLOAT& top,
FX_FLOAT& right,
FX_FLOAT& bottom) const;
static bool IsRectIntersect(const CFX_FloatRect& rect1,
const CFX_FloatRect& rect2);
private:
enum class TextOrientation {
Unknown,
Horizontal,
Vertical,
};
enum class GenerateCharacter {
None,
Space,
LineBreak,
Hyphen,
};
bool IsHyphen(FX_WCHAR curChar);
bool IsControlChar(const PAGECHAR_INFO& charInfo);
void ProcessObject();
void ProcessFormObject(CPDF_FormObject* pFormObj,
const CFX_Matrix& formMatrix);
void ProcessTextObject(PDFTEXT_Obj pObj);
void ProcessTextObject(CPDF_TextObject* pTextObj,
const CFX_Matrix& formMatrix,
const CPDF_PageObjectList* pObjList,
CPDF_PageObjectList::const_iterator ObjPos);
GenerateCharacter ProcessInsertObject(const CPDF_TextObject* pObj,
const CFX_Matrix& formMatrix);
bool GenerateCharInfo(FX_WCHAR unicode, PAGECHAR_INFO& info);
bool IsSameAsPreTextObject(CPDF_TextObject* pTextObj,
const CPDF_PageObjectList* pObjList,
CPDF_PageObjectList::const_iterator ObjPos);
bool IsSameTextObject(CPDF_TextObject* pTextObj1, CPDF_TextObject* pTextObj2);
int GetCharWidth(uint32_t charCode, CPDF_Font* pFont) const;
void CloseTempLine();
FPDFText_MarkedContent PreMarkedContent(PDFTEXT_Obj pObj);
void ProcessMarkedContent(PDFTEXT_Obj pObj);
void CheckMarkedContentObject(int32_t& start, int32_t& nCount) const;
void FindPreviousTextObject();
void AddCharInfoByLRDirection(FX_WCHAR wChar, PAGECHAR_INFO info);
void AddCharInfoByRLDirection(FX_WCHAR wChar, PAGECHAR_INFO info);
TextOrientation GetTextObjectWritingMode(
const CPDF_TextObject* pTextObj) const;
TextOrientation FindTextlineFlowOrientation() const;
void AppendGeneratedCharacter(FX_WCHAR unicode, const CFX_Matrix& formMatrix);
void SwapTempTextBuf(int32_t iCharListStartAppend, int32_t iBufStartAppend);
bool IsRightToLeft(const CPDF_TextObject* pTextObj,
const CPDF_Font* pFont,
int nItems) const;
const CPDF_Page* const m_pPage;
std::vector<uint16_t> m_CharIndex;
std::deque<PAGECHAR_INFO> m_CharList;
std::deque<PAGECHAR_INFO> m_TempCharList;
CFX_WideTextBuf m_TextBuf;
CFX_WideTextBuf m_TempTextBuf;
const FPDFText_Direction m_parserflag;
CPDF_TextObject* m_pPreTextObj;
CFX_Matrix m_perMatrix;
bool m_bIsParsed;
CFX_Matrix m_DisplayMatrix;
CFX_ArrayTemplate<FPDF_SEGMENT> m_Segments;
std::vector<CFX_FloatRect> m_SelRects;
CFX_ArrayTemplate<PDFTEXT_Obj> m_LineObj;
TextOrientation m_TextlineDir;
CFX_FloatRect m_CurlineRect;
};
#endif // CORE_FPDFTEXT_CPDF_TEXTPAGE_H_
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