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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 <functional>
#include <vector>
#include "core/fpdfapi/page/cpdf_pageobjectlist.h"
#include "core/fxcrt/cfx_widetextbuf.h"
#include "core/fxcrt/fx_coordinates.h"
#include "core/fxcrt/fx_string.h"
#include "core/fxcrt/unowned_ptr.h"
#include "third_party/base/optional.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_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_HYPHEN_CHAR L'-'
#define TEXT_HYPHEN L"-"
#define TEXT_CHARRATIO_GAPDELTA 0.070
enum class FPDFText_MarkedContent { Pass = 0, Done, Delay };
enum class FPDFText_Direction { Left = -1, Right = 1 };
class FPDF_CHAR_INFO {
public:
FPDF_CHAR_INFO();
~FPDF_CHAR_INFO();
wchar_t m_Unicode = 0;
wchar_t m_Charcode = 0;
int32_t m_Flag = 0;
float m_FontSize = 0;
CFX_PointF m_Origin;
CFX_FloatRect m_CharBox;
UnownedPtr<CPDF_TextObject> m_pTextObj;
CFX_Matrix m_Matrix;
};
class PAGECHAR_INFO {
public:
PAGECHAR_INFO();
PAGECHAR_INFO(const PAGECHAR_INFO&);
~PAGECHAR_INFO();
int m_Index = 0;
int m_CharCode = 0;
wchar_t m_Unicode = 0;
int32_t m_Flag = 0;
CFX_PointF m_Origin;
CFX_FloatRect m_CharBox;
UnownedPtr<CPDF_TextObject> m_pTextObj;
CFX_Matrix m_Matrix;
};
struct PDFTEXT_Obj {
PDFTEXT_Obj();
PDFTEXT_Obj(const PDFTEXT_Obj& that);
~PDFTEXT_Obj();
UnownedPtr<CPDF_TextObject> m_pTextObj;
CFX_Matrix m_formMatrix;
};
class CPDF_TextPage {
public:
CPDF_TextPage(const CPDF_Page* pPage, FPDFText_Direction flags);
~CPDF_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(const CFX_PointF& point, const CFX_SizeF& tolerance) const;
WideString GetTextByRect(const CFX_FloatRect& rect) const;
WideString GetTextByObject(const CPDF_TextObject* pTextObj) const;
// Returns string with the text from |m_TextBuf| that are covered by the input
// range. |start| and |count| are in terms of the |m_CharIndex|, so the range
// will be converted into appropriate indices.
WideString GetPageText(int start, int count) const;
WideString GetAllPageText() const { return GetPageText(0, CountChars()); }
int CountRects(int start, int nCount);
bool GetRect(int rectIndex, CFX_FloatRect* pRect) const;
private:
enum class TextOrientation {
Unknown,
Horizontal,
Vertical,
};
enum class GenerateCharacter {
None,
Space,
LineBreak,
Hyphen,
};
bool IsHyphen(wchar_t curChar) const;
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);
const PAGECHAR_INFO* GetPrevCharInfo() const;
Optional<PAGECHAR_INFO> GenerateCharInfo(wchar_t unicode);
bool IsSameAsPreTextObject(CPDF_TextObject* pTextObj,
const CPDF_PageObjectList* pObjList,
CPDF_PageObjectList::const_iterator ObjPos);
bool IsSameTextObject(CPDF_TextObject* pTextObj1, CPDF_TextObject* pTextObj2);
void CloseTempLine();
FPDFText_MarkedContent PreMarkedContent(PDFTEXT_Obj pObj);
void ProcessMarkedContent(PDFTEXT_Obj pObj);
void FindPreviousTextObject();
void AddCharInfoByLRDirection(wchar_t wChar, const PAGECHAR_INFO& info);
void AddCharInfoByRLDirection(wchar_t wChar, const PAGECHAR_INFO& info);
TextOrientation GetTextObjectWritingMode(
const CPDF_TextObject* pTextObj) const;
TextOrientation FindTextlineFlowOrientation() const;
void AppendGeneratedCharacter(wchar_t unicode, const CFX_Matrix& formMatrix);
void SwapTempTextBuf(int32_t iCharListStartAppend, int32_t iBufStartAppend);
WideString GetTextByPredicate(
const std::function<bool(const PAGECHAR_INFO&)>& predicate) const;
UnownedPtr<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;
UnownedPtr<CPDF_TextObject> m_pPreTextObj;
CFX_Matrix m_perMatrix;
bool m_bIsParsed = false;
CFX_Matrix m_DisplayMatrix;
std::vector<CFX_FloatRect> m_SelRects;
std::vector<PDFTEXT_Obj> m_LineObj;
TextOrientation m_TextlineDir = TextOrientation::Unknown;
CFX_FloatRect m_CurlineRect;
};
#endif // CORE_FPDFTEXT_CPDF_TEXTPAGE_H_
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