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PL286/external/pdfium/core/fpdftext/cpdf_textpage.cpp

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// 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
#include "core/fpdftext/cpdf_textpage.h"
#include <algorithm>
#include <utility>
#include <vector>
#include "core/fpdfapi/font/cpdf_font.h"
#include "core/fpdfapi/page/cpdf_form.h"
#include "core/fpdfapi/page/cpdf_formobject.h"
#include "core/fpdfapi/page/cpdf_page.h"
#include "core/fpdfapi/page/cpdf_pageobject.h"
#include "core/fpdfapi/page/cpdf_textobject.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_string.h"
#include "core/fpdftext/unicodenormalizationdata.h"
#include "core/fxcrt/fx_bidi.h"
#include "core/fxcrt/fx_ext.h"
#include "core/fxcrt/fx_ucd.h"
#include "third_party/base/stl_util.h"
namespace {
const FX_FLOAT kDefaultFontSize = 1.0f;
const uint16_t* const g_UnicodeData_Normalization_Maps[5] = {
nullptr, g_UnicodeData_Normalization_Map1, g_UnicodeData_Normalization_Map2,
g_UnicodeData_Normalization_Map3, g_UnicodeData_Normalization_Map4};
FX_FLOAT NormalizeThreshold(FX_FLOAT threshold) {
if (threshold < 300)
return threshold / 2.0f;
if (threshold < 500)
return threshold / 4.0f;
if (threshold < 700)
return threshold / 5.0f;
return threshold / 6.0f;
}
FX_FLOAT CalculateBaseSpace(const CPDF_TextObject* pTextObj,
const CFX_Matrix& matrix) {
FX_FLOAT baseSpace = 0.0;
const int nItems = pTextObj->CountItems();
if (pTextObj->m_TextState.GetCharSpace() && nItems >= 3) {
bool bAllChar = true;
FX_FLOAT spacing =
matrix.TransformDistance(pTextObj->m_TextState.GetCharSpace());
baseSpace = spacing;
for (int i = 0; i < nItems; i++) {
CPDF_TextObjectItem item;
pTextObj->GetItemInfo(i, &item);
if (item.m_CharCode == static_cast<uint32_t>(-1)) {
FX_FLOAT fontsize_h = pTextObj->m_TextState.GetFontSizeH();
FX_FLOAT kerning = -fontsize_h * item.m_Origin.x / 1000;
baseSpace = std::min(baseSpace, kerning + spacing);
bAllChar = false;
}
}
if (baseSpace < 0.0 || (nItems == 3 && !bAllChar))
baseSpace = 0.0;
}
return baseSpace;
}
FX_STRSIZE Unicode_GetNormalization(FX_WCHAR wch, FX_WCHAR* pDst) {
wch = wch & 0xFFFF;
FX_WCHAR wFind = g_UnicodeData_Normalization[wch];
if (!wFind) {
if (pDst)
*pDst = wch;
return 1;
}
if (wFind >= 0x8000) {
wch = wFind - 0x8000;
wFind = 1;
} else {
wch = wFind & 0x0FFF;
wFind >>= 12;
}
const uint16_t* pMap = g_UnicodeData_Normalization_Maps[wFind];
if (pMap == g_UnicodeData_Normalization_Map4) {
pMap = g_UnicodeData_Normalization_Map4 + wch;
wFind = (FX_WCHAR)(*pMap++);
} else {
pMap += wch;
}
if (pDst) {
FX_WCHAR n = wFind;
while (n--)
*pDst++ = *pMap++;
}
return (FX_STRSIZE)wFind;
}
float MaskPercentFilled(const std::vector<bool>& mask,
int32_t start,
int32_t end) {
if (start >= end)
return 0;
float count = std::count_if(mask.begin() + start, mask.begin() + end,
[](bool r) { return r; });
return count / (end - start);
}
} // namespace
FPDF_CHAR_INFO::FPDF_CHAR_INFO()
: m_Unicode(0),
m_Charcode(0),
m_Flag(0),
m_FontSize(0),
m_pTextObj(nullptr) {}
FPDF_CHAR_INFO::~FPDF_CHAR_INFO() {}
PAGECHAR_INFO::PAGECHAR_INFO()
: m_Index(0), m_CharCode(0), m_Unicode(0), m_Flag(0), m_pTextObj(nullptr) {}
PAGECHAR_INFO::PAGECHAR_INFO(const PAGECHAR_INFO&) = default;
PAGECHAR_INFO::~PAGECHAR_INFO() {}
CPDF_TextPage::CPDF_TextPage(const CPDF_Page* pPage, FPDFText_Direction flags)
: m_pPage(pPage),
m_parserflag(flags),
m_pPreTextObj(nullptr),
m_bIsParsed(false),
m_TextlineDir(TextOrientation::Unknown) {
m_TextBuf.EstimateSize(0, 10240);
m_DisplayMatrix =
pPage->GetDisplayMatrix(0, 0, static_cast<int>(pPage->GetPageWidth()),
static_cast<int>(pPage->GetPageHeight()), 0);
}
CPDF_TextPage::~CPDF_TextPage() {}
bool CPDF_TextPage::IsControlChar(const PAGECHAR_INFO& charInfo) {
switch (charInfo.m_Unicode) {
case 0x2:
case 0x3:
case 0x93:
case 0x94:
case 0x96:
case 0x97:
case 0x98:
case 0xfffe:
return charInfo.m_Flag != FPDFTEXT_CHAR_HYPHEN;
default:
return false;
}
}
void CPDF_TextPage::ParseTextPage() {
m_bIsParsed = false;
m_TextBuf.Clear();
m_CharList.clear();
m_pPreTextObj = nullptr;
ProcessObject();
m_bIsParsed = true;
m_CharIndex.clear();
int nCount = pdfium::CollectionSize<int>(m_CharList);
if (nCount)
m_CharIndex.push_back(0);
for (int i = 0; i < nCount; i++) {
int indexSize = pdfium::CollectionSize<int>(m_CharIndex);
const PAGECHAR_INFO& charinfo = m_CharList[i];
if (charinfo.m_Flag == FPDFTEXT_CHAR_GENERATED ||
(charinfo.m_Unicode != 0 && !IsControlChar(charinfo))) {
if (indexSize % 2) {
m_CharIndex.push_back(1);
} else {
if (indexSize <= 0)
continue;
m_CharIndex[indexSize - 1] += 1;
}
} else {
if (indexSize % 2) {
if (indexSize <= 0)
continue;
m_CharIndex[indexSize - 1] = i + 1;
} else {
m_CharIndex.push_back(i + 1);
}
}
}
int indexSize = pdfium::CollectionSize<int>(m_CharIndex);
if (indexSize % 2)
m_CharIndex.erase(m_CharIndex.begin() + indexSize - 1);
}
int CPDF_TextPage::CountChars() const {
return pdfium::CollectionSize<int>(m_CharList);
}
int CPDF_TextPage::CharIndexFromTextIndex(int TextIndex) const {
int indexSize = pdfium::CollectionSize<int>(m_CharIndex);
int count = 0;
for (int i = 0; i < indexSize; i += 2) {
count += m_CharIndex[i + 1];
if (count > TextIndex)
return TextIndex - count + m_CharIndex[i + 1] + m_CharIndex[i];
}
return -1;
}
int CPDF_TextPage::TextIndexFromCharIndex(int CharIndex) const {
int indexSize = pdfium::CollectionSize<int>(m_CharIndex);
int count = 0;
for (int i = 0; i < indexSize; i += 2) {
count += m_CharIndex[i + 1];
if (m_CharIndex[i + 1] + m_CharIndex[i] > CharIndex) {
if (CharIndex - m_CharIndex[i] < 0)
return -1;
return CharIndex - m_CharIndex[i] + count - m_CharIndex[i + 1];
}
}
return -1;
}
std::vector<CFX_FloatRect> CPDF_TextPage::GetRectArray(int start,
int nCount) const {
if (start < 0 || nCount == 0 || !m_bIsParsed)
return std::vector<CFX_FloatRect>();
if (nCount + start > pdfium::CollectionSize<int>(m_CharList) ||
nCount == -1) {
nCount = pdfium::CollectionSize<int>(m_CharList) - start;
}
std::vector<CFX_FloatRect> rectArray;
CPDF_TextObject* pCurObj = nullptr;
CFX_FloatRect rect;
int curPos = start;
bool bFlagNewRect = true;
while (nCount--) {
PAGECHAR_INFO info_curchar = m_CharList[curPos++];
if (info_curchar.m_Flag == FPDFTEXT_CHAR_GENERATED)
continue;
if (info_curchar.m_CharBox.Width() < 0.01 ||
info_curchar.m_CharBox.Height() < 0.01) {
continue;
}
if (!pCurObj)
pCurObj = info_curchar.m_pTextObj;
if (pCurObj != info_curchar.m_pTextObj) {
rectArray.push_back(rect);
pCurObj = info_curchar.m_pTextObj;
bFlagNewRect = true;
}
if (bFlagNewRect) {
CFX_Matrix matrix = info_curchar.m_pTextObj->GetTextMatrix();
matrix.Concat(info_curchar.m_Matrix);
CFX_Matrix matrix_reverse;
matrix_reverse.SetReverse(matrix);
CFX_PointF origin = matrix_reverse.Transform(info_curchar.m_Origin);
rect.left = info_curchar.m_CharBox.left;
rect.right = info_curchar.m_CharBox.right;
if (pCurObj->GetFont()->GetTypeDescent()) {
rect.bottom = origin.y +
pCurObj->GetFont()->GetTypeDescent() *
pCurObj->GetFontSize() / 1000;
rect.bottom = matrix.Transform(CFX_PointF(origin.x, rect.bottom)).y;
} else {
rect.bottom = info_curchar.m_CharBox.bottom;
}
if (pCurObj->GetFont()->GetTypeAscent()) {
rect.top =
origin.y +
pCurObj->GetFont()->GetTypeAscent() * pCurObj->GetFontSize() / 1000;
FX_FLOAT xPosTemp =
origin.x +
GetCharWidth(info_curchar.m_CharCode, pCurObj->GetFont()) *
pCurObj->GetFontSize() / 1000;
rect.top = matrix.Transform(CFX_PointF(xPosTemp, rect.top)).y;
} else {
rect.top = info_curchar.m_CharBox.top;
}
bFlagNewRect = false;
rect = info_curchar.m_CharBox;
rect.Normalize();
} else {
info_curchar.m_CharBox.Normalize();
rect.left = std::min(rect.left, info_curchar.m_CharBox.left);
rect.right = std::max(rect.right, info_curchar.m_CharBox.right);
rect.top = std::max(rect.top, info_curchar.m_CharBox.top);
rect.bottom = std::min(rect.bottom, info_curchar.m_CharBox.bottom);
}
}
rectArray.push_back(rect);
return rectArray;
}
int CPDF_TextPage::GetIndexAtPos(const CFX_PointF& point,
const CFX_SizeF& tolerance) const {
if (!m_bIsParsed)
return -3;
int pos = 0;
int NearPos = -1;
double xdif = 5000;
double ydif = 5000;
while (pos < pdfium::CollectionSize<int>(m_CharList)) {
PAGECHAR_INFO charinfo = m_CharList[pos];
CFX_FloatRect charrect = charinfo.m_CharBox;
if (charrect.Contains(point))
break;
if (tolerance.width > 0 || tolerance.height > 0) {
CFX_FloatRect charRectExt;
charrect.Normalize();
charRectExt.left = charrect.left - tolerance.width / 2;
charRectExt.right = charrect.right + tolerance.width / 2;
charRectExt.top = charrect.top + tolerance.height / 2;
charRectExt.bottom = charrect.bottom - tolerance.height / 2;
if (charRectExt.Contains(point)) {
double curXdif, curYdif;
curXdif = FXSYS_fabs(point.x - charrect.left) <
FXSYS_fabs(point.x - charrect.right)
? FXSYS_fabs(point.x - charrect.left)
: FXSYS_fabs(point.x - charrect.right);
curYdif = FXSYS_fabs(point.y - charrect.bottom) <
FXSYS_fabs(point.y - charrect.top)
? FXSYS_fabs(point.y - charrect.bottom)
: FXSYS_fabs(point.y - charrect.top);
if (curYdif + curXdif < xdif + ydif) {
ydif = curYdif;
xdif = curXdif;
NearPos = pos;
}
}
}
++pos;
}
return pos < pdfium::CollectionSize<int>(m_CharList) ? pos : NearPos;
}
CFX_WideString CPDF_TextPage::GetTextByRect(const CFX_FloatRect& rect) const {
if (!m_bIsParsed)
return CFX_WideString();
FX_FLOAT posy = 0;
bool IsContainPreChar = false;
bool IsAddLineFeed = false;
CFX_WideString strText;
for (const auto& charinfo : m_CharList) {
if (IsRectIntersect(rect, charinfo.m_CharBox)) {
if (FXSYS_fabs(posy - charinfo.m_Origin.y) > 0 && !IsContainPreChar &&
IsAddLineFeed) {
posy = charinfo.m_Origin.y;
if (!strText.IsEmpty())
strText += L"\r\n";
}
IsContainPreChar = true;
IsAddLineFeed = false;
if (charinfo.m_Unicode)
strText += charinfo.m_Unicode;
} else if (charinfo.m_Unicode == 32) {
if (IsContainPreChar && charinfo.m_Unicode) {
strText += charinfo.m_Unicode;
IsContainPreChar = false;
IsAddLineFeed = false;
}
} else {
IsContainPreChar = false;
IsAddLineFeed = true;
}
}
return strText;
}
void CPDF_TextPage::GetCharInfo(int index, FPDF_CHAR_INFO* info) const {
if (!m_bIsParsed)
return;
if (index < 0 || index >= pdfium::CollectionSize<int>(m_CharList))
return;
const PAGECHAR_INFO& charinfo = m_CharList[index];
info->m_Charcode = charinfo.m_CharCode;
info->m_Origin = charinfo.m_Origin;
info->m_Unicode = charinfo.m_Unicode;
info->m_Flag = charinfo.m_Flag;
info->m_CharBox = charinfo.m_CharBox;
info->m_pTextObj = charinfo.m_pTextObj;
if (charinfo.m_pTextObj && charinfo.m_pTextObj->GetFont())
info->m_FontSize = charinfo.m_pTextObj->GetFontSize();
else
info->m_FontSize = kDefaultFontSize;
info->m_Matrix = charinfo.m_Matrix;
}
void CPDF_TextPage::CheckMarkedContentObject(int32_t& start,
int32_t& nCount) const {
PAGECHAR_INFO charinfo = m_CharList[start];
PAGECHAR_INFO charinfo2 = m_CharList[start + nCount - 1];
if (FPDFTEXT_CHAR_PIECE != charinfo.m_Flag &&
FPDFTEXT_CHAR_PIECE != charinfo2.m_Flag) {
return;
}
if (FPDFTEXT_CHAR_PIECE == charinfo.m_Flag) {
PAGECHAR_INFO charinfo1 = charinfo;
int startIndex = start;
while (FPDFTEXT_CHAR_PIECE == charinfo1.m_Flag &&
charinfo1.m_Index == charinfo.m_Index) {
startIndex--;
if (startIndex < 0)
break;
charinfo1 = m_CharList[startIndex];
}
startIndex++;
start = startIndex;
}
if (FPDFTEXT_CHAR_PIECE == charinfo2.m_Flag) {
PAGECHAR_INFO charinfo3 = charinfo2;
int endIndex = start + nCount - 1;
while (FPDFTEXT_CHAR_PIECE == charinfo3.m_Flag &&
charinfo3.m_Index == charinfo2.m_Index) {
endIndex++;
if (endIndex >= pdfium::CollectionSize<int>(m_CharList))
break;
charinfo3 = m_CharList[endIndex];
}
endIndex--;
nCount = endIndex - start + 1;
}
}
CFX_WideString CPDF_TextPage::GetPageText(int start, int nCount) const {
if (!m_bIsParsed || nCount == 0)
return L"";
if (start < 0)
start = 0;
if (nCount == -1) {
nCount = pdfium::CollectionSize<int>(m_CharList) - start;
return CFX_WideString(
m_TextBuf.AsStringC().Mid(start, m_TextBuf.AsStringC().GetLength()));
}
if (nCount <= 0 || m_CharList.empty())
return L"";
if (nCount + start > pdfium::CollectionSize<int>(m_CharList) - 1)
nCount = pdfium::CollectionSize<int>(m_CharList) - start;
if (nCount <= 0)
return L"";
CheckMarkedContentObject(start, nCount);
int startindex = 0;
PAGECHAR_INFO charinfo = m_CharList[start];
int startOffset = 0;
while (charinfo.m_Index == -1) {
startOffset++;
if (startOffset > nCount ||
start + startOffset >= pdfium::CollectionSize<int>(m_CharList)) {
return L"";
}
charinfo = m_CharList[start + startOffset];
}
startindex = charinfo.m_Index;
charinfo = m_CharList[start + nCount - 1];
int nCountOffset = 0;
while (charinfo.m_Index == -1) {
nCountOffset++;
if (nCountOffset >= nCount)
return L"";
charinfo = m_CharList[start + nCount - nCountOffset - 1];
}
nCount = start + nCount - nCountOffset - startindex;
if (nCount <= 0)
return L"";
return CFX_WideString(m_TextBuf.AsStringC().Mid(startindex, nCount));
}
int CPDF_TextPage::CountRects(int start, int nCount) {
if (!m_bIsParsed || start < 0)
return -1;
if (nCount == -1 ||
nCount + start > pdfium::CollectionSize<int>(m_CharList)) {
nCount = pdfium::CollectionSize<int>(m_CharList) - start;
}
m_SelRects = GetRectArray(start, nCount);
return pdfium::CollectionSize<int>(m_SelRects);
}
void CPDF_TextPage::GetRect(int rectIndex,
FX_FLOAT& left,
FX_FLOAT& top,
FX_FLOAT& right,
FX_FLOAT& bottom) const {
if (!m_bIsParsed)
return;
if (rectIndex < 0 || rectIndex >= pdfium::CollectionSize<int>(m_SelRects))
return;
left = m_SelRects[rectIndex].left;
top = m_SelRects[rectIndex].top;
right = m_SelRects[rectIndex].right;
bottom = m_SelRects[rectIndex].bottom;
}
CPDF_TextPage::TextOrientation CPDF_TextPage::FindTextlineFlowOrientation()
const {
if (m_pPage->GetPageObjectList()->empty())
return TextOrientation::Unknown;
const int32_t nPageWidth = static_cast<int32_t>(m_pPage->GetPageWidth());
const int32_t nPageHeight = static_cast<int32_t>(m_pPage->GetPageHeight());
if (nPageWidth <= 0 || nPageHeight <= 0)
return TextOrientation::Unknown;
std::vector<bool> nHorizontalMask(nPageWidth);
std::vector<bool> nVerticalMask(nPageHeight);
FX_FLOAT fLineHeight = 0.0f;
int32_t nStartH = nPageWidth;
int32_t nEndH = 0;
int32_t nStartV = nPageHeight;
int32_t nEndV = 0;
for (const auto& pPageObj : *m_pPage->GetPageObjectList()) {
if (!pPageObj->IsText())
continue;
int32_t minH = std::max(static_cast<int32_t>(pPageObj->m_Left), 0);
int32_t maxH =
std::min(static_cast<int32_t>(pPageObj->m_Right), nPageWidth);
int32_t minV = std::max(static_cast<int32_t>(pPageObj->m_Bottom), 0);
int32_t maxV = std::min(static_cast<int32_t>(pPageObj->m_Top), nPageHeight);
if (minH >= maxH || minV >= maxV)
continue;
for (int32_t i = minH; i < maxH; ++i)
nHorizontalMask[i] = true;
for (int32_t i = minV; i < maxV; ++i)
nVerticalMask[i] = true;
nStartH = std::min(nStartH, minH);
nEndH = std::max(nEndH, maxH);
nStartV = std::min(nStartV, minV);
nEndV = std::max(nEndV, maxV);
if (fLineHeight <= 0.0f)
fLineHeight = pPageObj->m_Top - pPageObj->m_Bottom;
}
const int32_t nDoubleLineHeight = 2 * fLineHeight;
if ((nEndV - nStartV) < nDoubleLineHeight)
return TextOrientation::Horizontal;
if ((nEndH - nStartH) < nDoubleLineHeight)
return TextOrientation::Vertical;
const FX_FLOAT nSumH = MaskPercentFilled(nHorizontalMask, nStartH, nEndH);
if (nSumH > 0.8f)
return TextOrientation::Horizontal;
const FX_FLOAT nSumV = MaskPercentFilled(nVerticalMask, nStartV, nEndV);
if (nSumH > nSumV)
return TextOrientation::Horizontal;
if (nSumH < nSumV)
return TextOrientation::Vertical;
return TextOrientation::Unknown;
}
void CPDF_TextPage::AppendGeneratedCharacter(FX_WCHAR unicode,
const CFX_Matrix& formMatrix) {
PAGECHAR_INFO generateChar;
if (!GenerateCharInfo(unicode, generateChar))
return;
m_TextBuf.AppendChar(unicode);
if (!formMatrix.IsIdentity())
generateChar.m_Matrix = formMatrix;
m_CharList.push_back(generateChar);
}
void CPDF_TextPage::ProcessObject() {
if (m_pPage->GetPageObjectList()->empty())
return;
m_TextlineDir = FindTextlineFlowOrientation();
const CPDF_PageObjectList* pObjList = m_pPage->GetPageObjectList();
for (auto it = pObjList->begin(); it != pObjList->end(); ++it) {
if (CPDF_PageObject* pObj = it->get()) {
if (pObj->IsText()) {
CFX_Matrix matrix;
ProcessTextObject(pObj->AsText(), matrix, pObjList, it);
} else if (pObj->IsForm()) {
CFX_Matrix formMatrix(1, 0, 0, 1, 0, 0);
ProcessFormObject(pObj->AsForm(), formMatrix);
}
}
}
for (const auto& obj : m_LineObj)
ProcessTextObject(obj);
m_LineObj.clear();
CloseTempLine();
}
void CPDF_TextPage::ProcessFormObject(CPDF_FormObject* pFormObj,
const CFX_Matrix& formMatrix) {
CPDF_PageObjectList* pObjectList = pFormObj->m_pForm->GetPageObjectList();
if (pObjectList->empty())
return;
CFX_Matrix curFormMatrix;
curFormMatrix = pFormObj->m_FormMatrix;
curFormMatrix.Concat(formMatrix);
for (auto it = pObjectList->begin(); it != pObjectList->end(); ++it) {
if (CPDF_PageObject* pPageObj = it->get()) {
if (pPageObj->IsText())
ProcessTextObject(pPageObj->AsText(), curFormMatrix, pObjectList, it);
else if (pPageObj->IsForm())
ProcessFormObject(pPageObj->AsForm(), curFormMatrix);
}
}
}
int CPDF_TextPage::GetCharWidth(uint32_t charCode, CPDF_Font* pFont) const {
if (charCode == CPDF_Font::kInvalidCharCode)
return 0;
if (int w = pFont->GetCharWidthF(charCode))
return w;
CFX_ByteString str;
pFont->AppendChar(str, charCode);
if (int w = pFont->GetStringWidth(str.c_str(), 1))
return w;
return pFont->GetCharBBox(charCode).Width();
}
void CPDF_TextPage::AddCharInfoByLRDirection(FX_WCHAR wChar,
PAGECHAR_INFO info) {
if (IsControlChar(info)) {
info.m_Index = -1;
m_CharList.push_back(info);
return;
}
info.m_Index = m_TextBuf.GetLength();
if (wChar >= 0xFB00 && wChar <= 0xFB06) {
FX_WCHAR* pDst = nullptr;
FX_STRSIZE nCount = Unicode_GetNormalization(wChar, pDst);
if (nCount >= 1) {
pDst = FX_Alloc(FX_WCHAR, nCount);
Unicode_GetNormalization(wChar, pDst);
for (int nIndex = 0; nIndex < nCount; nIndex++) {
PAGECHAR_INFO info2 = info;
info2.m_Unicode = pDst[nIndex];
info2.m_Flag = FPDFTEXT_CHAR_PIECE;
m_TextBuf.AppendChar(info2.m_Unicode);
m_CharList.push_back(info2);
}
FX_Free(pDst);
return;
}
}
m_TextBuf.AppendChar(wChar);
m_CharList.push_back(info);
}
void CPDF_TextPage::AddCharInfoByRLDirection(FX_WCHAR wChar,
PAGECHAR_INFO info) {
if (IsControlChar(info)) {
info.m_Index = -1;
m_CharList.push_back(info);
return;
}
info.m_Index = m_TextBuf.GetLength();
wChar = FX_GetMirrorChar(wChar, true, false);
FX_WCHAR* pDst = nullptr;
FX_STRSIZE nCount = Unicode_GetNormalization(wChar, pDst);
if (nCount >= 1) {
pDst = FX_Alloc(FX_WCHAR, nCount);
Unicode_GetNormalization(wChar, pDst);
for (int nIndex = 0; nIndex < nCount; nIndex++) {
PAGECHAR_INFO info2 = info;
info2.m_Unicode = pDst[nIndex];
info2.m_Flag = FPDFTEXT_CHAR_PIECE;
m_TextBuf.AppendChar(info2.m_Unicode);
m_CharList.push_back(info2);
}
FX_Free(pDst);
return;
}
info.m_Unicode = wChar;
m_TextBuf.AppendChar(info.m_Unicode);
m_CharList.push_back(info);
}
void CPDF_TextPage::CloseTempLine() {
if (m_TempCharList.empty())
return;
CFX_WideString str = m_TempTextBuf.MakeString();
bool bPrevSpace = false;
for (int i = 0; i < str.GetLength(); i++) {
if (str.GetAt(i) != ' ') {
bPrevSpace = false;
continue;
}
if (bPrevSpace) {
m_TempTextBuf.Delete(i, 1);
m_TempCharList.erase(m_TempCharList.begin() + i);
str.Delete(i);
i--;
}
bPrevSpace = true;
}
CFX_BidiString bidi(str);
if (m_parserflag == FPDFText_Direction::Right)
bidi.SetOverallDirectionRight();
CFX_BidiChar::Direction eCurrentDirection = bidi.OverallDirection();
for (const auto& segment : bidi) {
if (segment.direction == CFX_BidiChar::RIGHT ||
(segment.direction == CFX_BidiChar::NEUTRAL &&
eCurrentDirection == CFX_BidiChar::RIGHT)) {
eCurrentDirection = CFX_BidiChar::RIGHT;
for (int m = segment.start + segment.count; m > segment.start; --m)
AddCharInfoByRLDirection(bidi.CharAt(m - 1), m_TempCharList[m - 1]);
} else {
eCurrentDirection = CFX_BidiChar::LEFT;
for (int m = segment.start; m < segment.start + segment.count; m++)
AddCharInfoByLRDirection(bidi.CharAt(m), m_TempCharList[m]);
}
}
m_TempCharList.clear();
m_TempTextBuf.Delete(0, m_TempTextBuf.GetLength());
}
void CPDF_TextPage::ProcessTextObject(
CPDF_TextObject* pTextObj,
const CFX_Matrix& formMatrix,
const CPDF_PageObjectList* pObjList,
CPDF_PageObjectList::const_iterator ObjPos) {
if (FXSYS_fabs(pTextObj->m_Right - pTextObj->m_Left) < 0.01f)
return;
size_t count = m_LineObj.size();
PDFTEXT_Obj Obj;
Obj.m_pTextObj = pTextObj;
Obj.m_formMatrix = formMatrix;
if (count == 0) {
m_LineObj.push_back(Obj);
return;
}
if (IsSameAsPreTextObject(pTextObj, pObjList, ObjPos))
return;
PDFTEXT_Obj prev_Obj = m_LineObj[count - 1];
CPDF_TextObjectItem item;
int nItem = prev_Obj.m_pTextObj->CountItems();
prev_Obj.m_pTextObj->GetItemInfo(nItem - 1, &item);
FX_FLOAT prev_width =
GetCharWidth(item.m_CharCode, prev_Obj.m_pTextObj->GetFont()) *
prev_Obj.m_pTextObj->GetFontSize() / 1000;
CFX_Matrix prev_matrix = prev_Obj.m_pTextObj->GetTextMatrix();
prev_width = FXSYS_fabs(prev_width);
prev_matrix.Concat(prev_Obj.m_formMatrix);
prev_width = prev_matrix.TransformDistance(prev_width);
pTextObj->GetItemInfo(0, &item);
FX_FLOAT this_width = GetCharWidth(item.m_CharCode, pTextObj->GetFont()) *
pTextObj->GetFontSize() / 1000;
this_width = FXSYS_fabs(this_width);
CFX_Matrix this_matrix = pTextObj->GetTextMatrix();
this_width = FXSYS_fabs(this_width);
this_matrix.Concat(formMatrix);
this_width = this_matrix.TransformDistance(this_width);
FX_FLOAT threshold =
prev_width > this_width ? prev_width / 4 : this_width / 4;
CFX_PointF prev_pos = m_DisplayMatrix.Transform(
prev_Obj.m_formMatrix.Transform(prev_Obj.m_pTextObj->GetPos()));
CFX_PointF this_pos =
m_DisplayMatrix.Transform(formMatrix.Transform(pTextObj->GetPos()));
if (FXSYS_fabs(this_pos.y - prev_pos.y) > threshold * 2) {
for (size_t i = 0; i < count; i++)
ProcessTextObject(m_LineObj[i]);
m_LineObj.clear();
m_LineObj.push_back(Obj);
return;
}
for (size_t i = count; i > 0; --i) {
PDFTEXT_Obj prev_text_obj = m_LineObj[i - 1];
CFX_PointF new_prev_pos =
m_DisplayMatrix.Transform(prev_text_obj.m_formMatrix.Transform(
prev_text_obj.m_pTextObj->GetPos()));
if (this_pos.x >= new_prev_pos.x) {
m_LineObj.insert(m_LineObj.begin() + i, Obj);
return;
}
}
m_LineObj.insert(m_LineObj.begin(), Obj);
}
FPDFText_MarkedContent CPDF_TextPage::PreMarkedContent(PDFTEXT_Obj Obj) {
CPDF_TextObject* pTextObj = Obj.m_pTextObj;
if (!pTextObj->m_ContentMark)
return FPDFText_MarkedContent::Pass;
int nContentMark = pTextObj->m_ContentMark.CountItems();
if (nContentMark < 1)
return FPDFText_MarkedContent::Pass;
CFX_WideString actText;
bool bExist = false;
CPDF_Dictionary* pDict = nullptr;
int n = 0;
for (n = 0; n < nContentMark; n++) {
const CPDF_ContentMarkItem& item = pTextObj->m_ContentMark.GetItem(n);
pDict = item.GetParam();
if (!pDict)
continue;
CPDF_String* temp = ToString(pDict->GetObjectFor("ActualText"));
if (temp) {
bExist = true;
actText = temp->GetUnicodeText();
}
}
if (!bExist)
return FPDFText_MarkedContent::Pass;
if (m_pPreTextObj && m_pPreTextObj->m_ContentMark &&
m_pPreTextObj->m_ContentMark.CountItems() == n &&
pDict == m_pPreTextObj->m_ContentMark.GetItem(n - 1).GetParam()) {
return FPDFText_MarkedContent::Done;
}
FX_STRSIZE nItems = actText.GetLength();
if (nItems < 1)
return FPDFText_MarkedContent::Pass;
CPDF_Font* pFont = pTextObj->GetFont();
bExist = false;
for (FX_STRSIZE i = 0; i < nItems; i++) {
if (pFont->CharCodeFromUnicode(actText.GetAt(i)) !=
CPDF_Font::kInvalidCharCode) {
bExist = true;
break;
}
}
if (!bExist)
return FPDFText_MarkedContent::Pass;
bExist = false;
for (FX_STRSIZE i = 0; i < nItems; i++) {
FX_WCHAR wChar = actText.GetAt(i);
if ((wChar > 0x80 && wChar < 0xFFFD) || (wChar <= 0x80 && isprint(wChar))) {
bExist = true;
break;
}
}
if (!bExist)
return FPDFText_MarkedContent::Done;
return FPDFText_MarkedContent::Delay;
}
void CPDF_TextPage::ProcessMarkedContent(PDFTEXT_Obj Obj) {
CPDF_TextObject* pTextObj = Obj.m_pTextObj;
if (!pTextObj->m_ContentMark)
return;
int nContentMark = pTextObj->m_ContentMark.CountItems();
if (nContentMark < 1)
return;
CFX_WideString actText;
for (int n = 0; n < nContentMark; n++) {
const CPDF_ContentMarkItem& item = pTextObj->m_ContentMark.GetItem(n);
CPDF_Dictionary* pDict = item.GetParam();
if (pDict)
actText = pDict->GetUnicodeTextFor("ActualText");
}
FX_STRSIZE nItems = actText.GetLength();
if (nItems < 1)
return;
CPDF_Font* pFont = pTextObj->GetFont();
CFX_Matrix matrix = pTextObj->GetTextMatrix();
matrix.Concat(Obj.m_formMatrix);
for (FX_STRSIZE k = 0; k < nItems; k++) {
FX_WCHAR wChar = actText.GetAt(k);
if (wChar <= 0x80 && !isprint(wChar))
wChar = 0x20;
if (wChar >= 0xFFFD)
continue;
PAGECHAR_INFO charinfo;
charinfo.m_Origin = pTextObj->GetPos();
charinfo.m_Index = m_TextBuf.GetLength();
charinfo.m_Unicode = wChar;
charinfo.m_CharCode = pFont->CharCodeFromUnicode(wChar);
charinfo.m_Flag = FPDFTEXT_CHAR_PIECE;
charinfo.m_pTextObj = pTextObj;
charinfo.m_CharBox = pTextObj->GetRect();
charinfo.m_Matrix = matrix;
m_TempTextBuf.AppendChar(wChar);
m_TempCharList.push_back(charinfo);
}
}
void CPDF_TextPage::FindPreviousTextObject() {
if (m_TempCharList.empty() && m_CharList.empty())
return;
PAGECHAR_INFO preChar =
m_TempCharList.empty() ? m_CharList.back() : m_TempCharList.back();
if (preChar.m_pTextObj)
m_pPreTextObj = preChar.m_pTextObj;
}
void CPDF_TextPage::SwapTempTextBuf(int32_t iCharListStartAppend,
int32_t iBufStartAppend) {
int32_t i = iCharListStartAppend;
int32_t j = pdfium::CollectionSize<int32_t>(m_TempCharList) - 1;
for (; i < j; i++, j--) {
std::swap(m_TempCharList[i], m_TempCharList[j]);
std::swap(m_TempCharList[i].m_Index, m_TempCharList[j].m_Index);
}
FX_WCHAR* pTempBuffer = m_TempTextBuf.GetBuffer();
i = iBufStartAppend;
j = m_TempTextBuf.GetLength() - 1;
for (; i < j; i++, j--)
std::swap(pTempBuffer[i], pTempBuffer[j]);
}
bool CPDF_TextPage::IsRightToLeft(const CPDF_TextObject* pTextObj,
const CPDF_Font* pFont,
int nItems) const {
CFX_WideString str;
for (int32_t i = 0; i < nItems; i++) {
CPDF_TextObjectItem item;
pTextObj->GetItemInfo(i, &item);
if (item.m_CharCode == static_cast<uint32_t>(-1))
continue;
CFX_WideString wstrItem = pFont->UnicodeFromCharCode(item.m_CharCode);
FX_WCHAR wChar = wstrItem.GetAt(0);
if ((wstrItem.IsEmpty() || wChar == 0) && item.m_CharCode)
wChar = (FX_WCHAR)item.m_CharCode;
if (wChar)
str += wChar;
}
return CFX_BidiString(str).OverallDirection() == CFX_BidiChar::RIGHT;
}
void CPDF_TextPage::ProcessTextObject(PDFTEXT_Obj Obj) {
CPDF_TextObject* pTextObj = Obj.m_pTextObj;
if (FXSYS_fabs(pTextObj->m_Right - pTextObj->m_Left) < 0.01f)
return;
CFX_Matrix formMatrix = Obj.m_formMatrix;
CPDF_Font* pFont = pTextObj->GetFont();
CFX_Matrix matrix = pTextObj->GetTextMatrix();
matrix.Concat(formMatrix);
FPDFText_MarkedContent ePreMKC = PreMarkedContent(Obj);
if (ePreMKC == FPDFText_MarkedContent::Done) {
m_pPreTextObj = pTextObj;
m_perMatrix = formMatrix;
return;
}
GenerateCharacter result = GenerateCharacter::None;
if (m_pPreTextObj) {
result = ProcessInsertObject(pTextObj, formMatrix);
if (result == GenerateCharacter::LineBreak)
m_CurlineRect = Obj.m_pTextObj->GetRect();
else
m_CurlineRect.Union(Obj.m_pTextObj->GetRect());
switch (result) {
case GenerateCharacter::None:
break;
case GenerateCharacter::Space: {
PAGECHAR_INFO generateChar;
if (GenerateCharInfo(TEXT_SPACE_CHAR, generateChar)) {
if (!formMatrix.IsIdentity())
generateChar.m_Matrix = formMatrix;
m_TempTextBuf.AppendChar(TEXT_SPACE_CHAR);
m_TempCharList.push_back(generateChar);
}
break;
}
case GenerateCharacter::LineBreak:
CloseTempLine();
if (m_TextBuf.GetSize()) {
AppendGeneratedCharacter(TEXT_RETURN_CHAR, formMatrix);
AppendGeneratedCharacter(TEXT_LINEFEED_CHAR, formMatrix);
}
break;
case GenerateCharacter::Hyphen:
if (pTextObj->CountChars() == 1) {
CPDF_TextObjectItem item;
pTextObj->GetCharInfo(0, &item);
CFX_WideString wstrItem =
pTextObj->GetFont()->UnicodeFromCharCode(item.m_CharCode);
if (wstrItem.IsEmpty())
wstrItem += (FX_WCHAR)item.m_CharCode;
FX_WCHAR curChar = wstrItem.GetAt(0);
if (curChar == 0x2D || curChar == 0xAD)
return;
}
while (m_TempTextBuf.GetSize() > 0 &&
m_TempTextBuf.AsStringC().GetAt(m_TempTextBuf.GetLength() - 1) ==
0x20) {
m_TempTextBuf.Delete(m_TempTextBuf.GetLength() - 1, 1);
m_TempCharList.pop_back();
}
PAGECHAR_INFO* charinfo = &m_TempCharList.back();
m_TempTextBuf.Delete(m_TempTextBuf.GetLength() - 1, 1);
charinfo->m_Unicode = 0x2;
charinfo->m_Flag = FPDFTEXT_CHAR_HYPHEN;
m_TempTextBuf.AppendChar(0xfffe);
break;
}
} else {
m_CurlineRect = Obj.m_pTextObj->GetRect();
}
if (ePreMKC == FPDFText_MarkedContent::Delay) {
ProcessMarkedContent(Obj);
m_pPreTextObj = pTextObj;
m_perMatrix = formMatrix;
return;
}
m_pPreTextObj = pTextObj;
m_perMatrix = formMatrix;
int nItems = pTextObj->CountItems();
FX_FLOAT baseSpace = CalculateBaseSpace(pTextObj, matrix);
const bool bR2L = IsRightToLeft(pTextObj, pFont, nItems);
const bool bIsBidiAndMirrorInverse =
bR2L && (matrix.a * matrix.d - matrix.b * matrix.c) < 0;
int32_t iBufStartAppend = m_TempTextBuf.GetLength();
int32_t iCharListStartAppend =
pdfium::CollectionSize<int32_t>(m_TempCharList);
FX_FLOAT spacing = 0;
for (int i = 0; i < nItems; i++) {
CPDF_TextObjectItem item;
PAGECHAR_INFO charinfo;
pTextObj->GetItemInfo(i, &item);
if (item.m_CharCode == static_cast<uint32_t>(-1)) {
CFX_WideString str = m_TempTextBuf.MakeString();
if (str.IsEmpty())
str = m_TextBuf.AsStringC();
if (str.IsEmpty() || str.GetAt(str.GetLength() - 1) == TEXT_SPACE_CHAR)
continue;
FX_FLOAT fontsize_h = pTextObj->m_TextState.GetFontSizeH();
spacing = -fontsize_h * item.m_Origin.x / 1000;
continue;
}
FX_FLOAT charSpace = pTextObj->m_TextState.GetCharSpace();
if (charSpace > 0.001)
spacing += matrix.TransformDistance(charSpace);
else if (charSpace < -0.001)
spacing -= matrix.TransformDistance(FXSYS_fabs(charSpace));
spacing -= baseSpace;
if (spacing && i > 0) {
int last_width = 0;
FX_FLOAT fontsize_h = pTextObj->m_TextState.GetFontSizeH();
uint32_t space_charcode = pFont->CharCodeFromUnicode(' ');
FX_FLOAT threshold = 0;
if (space_charcode != CPDF_Font::kInvalidCharCode)
threshold = fontsize_h * pFont->GetCharWidthF(space_charcode) / 1000;
if (threshold > fontsize_h / 3)
threshold = 0;
else
threshold /= 2;
if (threshold == 0) {
threshold = fontsize_h;
int this_width = FXSYS_abs(GetCharWidth(item.m_CharCode, pFont));
threshold = this_width > last_width ? (FX_FLOAT)this_width
: (FX_FLOAT)last_width;
threshold = NormalizeThreshold(threshold);
threshold = fontsize_h * threshold / 1000;
}
if (threshold && (spacing && spacing >= threshold)) {
charinfo.m_Unicode = TEXT_SPACE_CHAR;
charinfo.m_Flag = FPDFTEXT_CHAR_GENERATED;
charinfo.m_pTextObj = pTextObj;
charinfo.m_Index = m_TextBuf.GetLength();
m_TempTextBuf.AppendChar(TEXT_SPACE_CHAR);
charinfo.m_CharCode = CPDF_Font::kInvalidCharCode;
charinfo.m_Matrix = formMatrix;
charinfo.m_Origin = matrix.Transform(item.m_Origin);
charinfo.m_CharBox =
CFX_FloatRect(charinfo.m_Origin.x, charinfo.m_Origin.y,
charinfo.m_Origin.x, charinfo.m_Origin.y);
m_TempCharList.push_back(charinfo);
}
if (item.m_CharCode == CPDF_Font::kInvalidCharCode)
continue;
}
spacing = 0;
CFX_WideString wstrItem = pFont->UnicodeFromCharCode(item.m_CharCode);
bool bNoUnicode = false;
if (wstrItem.IsEmpty() && item.m_CharCode) {
wstrItem += static_cast<FX_WCHAR>(item.m_CharCode);
bNoUnicode = true;
}
charinfo.m_Index = -1;
charinfo.m_CharCode = item.m_CharCode;
if (bNoUnicode)
charinfo.m_Flag = FPDFTEXT_CHAR_UNUNICODE;
else
charinfo.m_Flag = FPDFTEXT_CHAR_NORMAL;
charinfo.m_pTextObj = pTextObj;
charinfo.m_Origin = matrix.Transform(item.m_Origin);
FX_RECT rect =
charinfo.m_pTextObj->GetFont()->GetCharBBox(charinfo.m_CharCode);
charinfo.m_CharBox.top =
rect.top * pTextObj->GetFontSize() / 1000 + item.m_Origin.y;
charinfo.m_CharBox.left =
rect.left * pTextObj->GetFontSize() / 1000 + item.m_Origin.x;
charinfo.m_CharBox.right =
rect.right * pTextObj->GetFontSize() / 1000 + item.m_Origin.x;
charinfo.m_CharBox.bottom =
rect.bottom * pTextObj->GetFontSize() / 1000 + item.m_Origin.y;
if (fabsf(charinfo.m_CharBox.top - charinfo.m_CharBox.bottom) < 0.01f) {
charinfo.m_CharBox.top =
charinfo.m_CharBox.bottom + pTextObj->GetFontSize();
}
if (fabsf(charinfo.m_CharBox.right - charinfo.m_CharBox.left) < 0.01f) {
charinfo.m_CharBox.right =
charinfo.m_CharBox.left + pTextObj->GetCharWidth(charinfo.m_CharCode);
}
matrix.TransformRect(charinfo.m_CharBox);
charinfo.m_Matrix = matrix;
if (wstrItem.IsEmpty()) {
charinfo.m_Unicode = 0;
m_TempCharList.push_back(charinfo);
m_TempTextBuf.AppendChar(0xfffe);
continue;
} else {
int nTotal = wstrItem.GetLength();
bool bDel = false;
const int count =
std::min(pdfium::CollectionSize<int>(m_TempCharList), 7);
FX_FLOAT threshold = charinfo.m_Matrix.TransformXDistance(
(FX_FLOAT)TEXT_CHARRATIO_GAPDELTA * pTextObj->GetFontSize());
for (int n = pdfium::CollectionSize<int>(m_TempCharList);
n > pdfium::CollectionSize<int>(m_TempCharList) - count; n--) {
const PAGECHAR_INFO& charinfo1 = m_TempCharList[n - 1];
CFX_PointF diff = charinfo1.m_Origin - charinfo.m_Origin;
if (charinfo1.m_CharCode == charinfo.m_CharCode &&
charinfo1.m_pTextObj->GetFont() == charinfo.m_pTextObj->GetFont() &&
FXSYS_fabs(diff.x) < threshold && FXSYS_fabs(diff.y) < threshold) {
bDel = true;
break;
}
}
if (!bDel) {
for (int nIndex = 0; nIndex < nTotal; nIndex++) {
charinfo.m_Unicode = wstrItem.GetAt(nIndex);
if (charinfo.m_Unicode) {
charinfo.m_Index = m_TextBuf.GetLength();
m_TempTextBuf.AppendChar(charinfo.m_Unicode);
} else {
m_TempTextBuf.AppendChar(0xfffe);
}
m_TempCharList.push_back(charinfo);
}
} else if (i == 0) {
CFX_WideString str = m_TempTextBuf.MakeString();
if (!str.IsEmpty() &&
str.GetAt(str.GetLength() - 1) == TEXT_SPACE_CHAR) {
m_TempTextBuf.Delete(m_TempTextBuf.GetLength() - 1, 1);
m_TempCharList.pop_back();
}
}
}
}
if (bIsBidiAndMirrorInverse)
SwapTempTextBuf(iCharListStartAppend, iBufStartAppend);
}
CPDF_TextPage::TextOrientation CPDF_TextPage::GetTextObjectWritingMode(
const CPDF_TextObject* pTextObj) const {
int32_t nChars = pTextObj->CountChars();
if (nChars == 1)
return m_TextlineDir;
CPDF_TextObjectItem first, last;
pTextObj->GetCharInfo(0, &first);
pTextObj->GetCharInfo(nChars - 1, &last);
CFX_Matrix textMatrix = pTextObj->GetTextMatrix();
first.m_Origin = textMatrix.Transform(first.m_Origin);
last.m_Origin = textMatrix.Transform(last.m_Origin);
FX_FLOAT dX = FXSYS_fabs(last.m_Origin.x - first.m_Origin.x);
FX_FLOAT dY = FXSYS_fabs(last.m_Origin.y - first.m_Origin.y);
if (dX <= 0.0001f && dY <= 0.0001f)
return TextOrientation::Unknown;
CFX_VectorF v(dX, dY);
v.Normalize();
if (v.y <= 0.0872f)
return v.x <= 0.0872f ? m_TextlineDir : TextOrientation::Horizontal;
if (v.x <= 0.0872f)
return TextOrientation::Vertical;
return m_TextlineDir;
}
bool CPDF_TextPage::IsHyphen(FX_WCHAR curChar) {
CFX_WideString strCurText = m_TempTextBuf.MakeString();
if (strCurText.IsEmpty())
strCurText = m_TextBuf.AsStringC();
FX_STRSIZE nCount = strCurText.GetLength();
int nIndex = nCount - 1;
FX_WCHAR wcTmp = strCurText.GetAt(nIndex);
while (wcTmp == 0x20 && nIndex <= nCount - 1 && nIndex >= 0)
wcTmp = strCurText.GetAt(--nIndex);
if (0x2D == wcTmp || 0xAD == wcTmp) {
if (--nIndex > 0) {
FX_WCHAR preChar = strCurText.GetAt((nIndex));
if (((preChar >= L'A' && preChar <= L'Z') ||
(preChar >= L'a' && preChar <= L'z')) &&
((curChar >= L'A' && curChar <= L'Z') ||
(curChar >= L'a' && curChar <= L'z'))) {
return true;
}
}
const PAGECHAR_INFO* preInfo;
if (!m_TempCharList.empty())
preInfo = &m_TempCharList.back();
else if (!m_CharList.empty())
preInfo = &m_CharList.back();
else
return false;
if (FPDFTEXT_CHAR_PIECE == preInfo->m_Flag &&
(0xAD == preInfo->m_Unicode || 0x2D == preInfo->m_Unicode)) {
return true;
}
}
return false;
}
CPDF_TextPage::GenerateCharacter CPDF_TextPage::ProcessInsertObject(
const CPDF_TextObject* pObj,
const CFX_Matrix& formMatrix) {
FindPreviousTextObject();
TextOrientation WritingMode = GetTextObjectWritingMode(pObj);
if (WritingMode == TextOrientation::Unknown)
WritingMode = GetTextObjectWritingMode(m_pPreTextObj);
CFX_FloatRect this_rect = pObj->GetRect();
CFX_FloatRect prev_rect = m_pPreTextObj->GetRect();
CPDF_TextObjectItem PrevItem;
CPDF_TextObjectItem item;
int nItem = m_pPreTextObj->CountItems();
m_pPreTextObj->GetItemInfo(nItem - 1, &PrevItem);
pObj->GetItemInfo(0, &item);
CFX_WideString wstrItem =
pObj->GetFont()->UnicodeFromCharCode(item.m_CharCode);
if (wstrItem.IsEmpty())
wstrItem += static_cast<FX_WCHAR>(item.m_CharCode);
FX_WCHAR curChar = wstrItem.GetAt(0);
if (WritingMode == TextOrientation::Horizontal) {
if (this_rect.Height() > 4.5 && prev_rect.Height() > 4.5) {
FX_FLOAT top =
this_rect.top < prev_rect.top ? this_rect.top : prev_rect.top;
FX_FLOAT bottom = this_rect.bottom > prev_rect.bottom ? this_rect.bottom
: prev_rect.bottom;
if (bottom >= top) {
return IsHyphen(curChar) ? GenerateCharacter::Hyphen
: GenerateCharacter::LineBreak;
}
}
} else if (WritingMode == TextOrientation::Vertical) {
if (this_rect.Width() > pObj->GetFontSize() * 0.1f &&
prev_rect.Width() > m_pPreTextObj->GetFontSize() * 0.1f) {
FX_FLOAT left = this_rect.left > m_CurlineRect.left ? this_rect.left
: m_CurlineRect.left;
FX_FLOAT right = this_rect.right < m_CurlineRect.right
? this_rect.right
: m_CurlineRect.right;
if (right <= left) {
return IsHyphen(curChar) ? GenerateCharacter::Hyphen
: GenerateCharacter::LineBreak;
}
}
}
FX_FLOAT last_pos = PrevItem.m_Origin.x;
int nLastWidth = GetCharWidth(PrevItem.m_CharCode, m_pPreTextObj->GetFont());
FX_FLOAT last_width = nLastWidth * m_pPreTextObj->GetFontSize() / 1000;
last_width = FXSYS_fabs(last_width);
int nThisWidth = GetCharWidth(item.m_CharCode, pObj->GetFont());
FX_FLOAT this_width = nThisWidth * pObj->GetFontSize() / 1000;
this_width = FXSYS_fabs(this_width);
FX_FLOAT threshold =
last_width > this_width ? last_width / 4 : this_width / 4;
CFX_Matrix prev_matrix = m_pPreTextObj->GetTextMatrix();
prev_matrix.Concat(m_perMatrix);
CFX_Matrix prev_reverse;
prev_reverse.SetReverse(prev_matrix);
CFX_PointF pos = prev_reverse.Transform(formMatrix.Transform(pObj->GetPos()));
if (last_width < this_width)
threshold = prev_reverse.TransformDistance(threshold);
bool bNewline = false;
if (WritingMode == TextOrientation::Horizontal) {
CFX_FloatRect rect1(m_pPreTextObj->m_Left, pObj->m_Bottom,
m_pPreTextObj->m_Right, pObj->m_Top);
CFX_FloatRect rect2 = m_pPreTextObj->GetRect();
CFX_FloatRect rect3 = rect1;
rect1.Intersect(rect2);
if ((rect1.IsEmpty() && rect2.Height() > 5 && rect3.Height() > 5) ||
((pos.y > threshold * 2 || pos.y < threshold * -3) &&
(FXSYS_fabs(pos.y) < 1 ? FXSYS_fabs(pos.x) < FXSYS_fabs(pos.y)
: true))) {
bNewline = true;
if (nItem > 1) {
CPDF_TextObjectItem tempItem;
m_pPreTextObj->GetItemInfo(0, &tempItem);
CFX_Matrix m = m_pPreTextObj->GetTextMatrix();
if (PrevItem.m_Origin.x > tempItem.m_Origin.x &&
m_DisplayMatrix.a > 0.9 && m_DisplayMatrix.b < 0.1 &&
m_DisplayMatrix.c < 0.1 && m_DisplayMatrix.d < -0.9 && m.b < 0.1 &&
m.c < 0.1) {
CFX_FloatRect re(0, m_pPreTextObj->m_Bottom, 1000,
m_pPreTextObj->m_Top);
if (re.Contains(pObj->GetPos())) {
bNewline = false;
} else {
CFX_FloatRect rect(0, pObj->m_Bottom, 1000, pObj->m_Top);
if (rect.Contains(m_pPreTextObj->GetPos()))
bNewline = false;
}
}
}
}
}
if (bNewline) {
return IsHyphen(curChar) ? GenerateCharacter::Hyphen
: GenerateCharacter::LineBreak;
}
int32_t nChars = pObj->CountChars();
if (nChars == 1 && (0x2D == curChar || 0xAD == curChar) &&
IsHyphen(curChar)) {
return GenerateCharacter::Hyphen;
}
CFX_WideString PrevStr =
m_pPreTextObj->GetFont()->UnicodeFromCharCode(PrevItem.m_CharCode);
FX_WCHAR preChar = PrevStr.GetAt(PrevStr.GetLength() - 1);
CFX_Matrix matrix = pObj->GetTextMatrix();
matrix.Concat(formMatrix);
threshold = (FX_FLOAT)(nLastWidth > nThisWidth ? nLastWidth : nThisWidth);
threshold = threshold > 400
? (threshold < 700
? threshold / 4
: (threshold > 800 ? threshold / 6 : threshold / 5))
: (threshold / 2);
if (nLastWidth >= nThisWidth) {
threshold *= FXSYS_fabs(m_pPreTextObj->GetFontSize());
} else {
threshold *= FXSYS_fabs(pObj->GetFontSize());
threshold = matrix.TransformDistance(threshold);
threshold = prev_reverse.TransformDistance(threshold);
}
threshold /= 1000;
if ((threshold < 1.4881 && threshold > 1.4879) ||
(threshold < 1.39001 && threshold > 1.38999)) {
threshold *= 1.5;
}
if (FXSYS_fabs(last_pos + last_width - pos.x) > threshold &&
curChar != L' ' && preChar != L' ') {
if (curChar != L' ' && preChar != L' ') {
if ((pos.x - last_pos - last_width) > threshold ||
(last_pos - pos.x - last_width) > threshold) {
return GenerateCharacter::Space;
}
if (pos.x < 0 && (last_pos - pos.x - last_width) > threshold)
return GenerateCharacter::Space;
if ((pos.x - last_pos - last_width) > this_width ||
(pos.x - last_pos - this_width) > last_width) {
return GenerateCharacter::Space;
}
}
}
return GenerateCharacter::None;
}
bool CPDF_TextPage::IsSameTextObject(CPDF_TextObject* pTextObj1,
CPDF_TextObject* pTextObj2) {
if (!pTextObj1 || !pTextObj2)
return false;
CFX_FloatRect rcPreObj = pTextObj2->GetRect();
CFX_FloatRect rcCurObj = pTextObj1->GetRect();
if (rcPreObj.IsEmpty() && rcCurObj.IsEmpty()) {
FX_FLOAT dbXdif = FXSYS_fabs(rcPreObj.left - rcCurObj.left);
size_t nCount = m_CharList.size();
if (nCount >= 2) {
PAGECHAR_INFO perCharTemp = m_CharList[nCount - 2];
FX_FLOAT dbSpace = perCharTemp.m_CharBox.Width();
if (dbXdif > dbSpace)
return false;
}
}
if (!rcPreObj.IsEmpty() || !rcCurObj.IsEmpty()) {
rcPreObj.Intersect(rcCurObj);
if (rcPreObj.IsEmpty())
return false;
if (FXSYS_fabs(rcPreObj.Width() - rcCurObj.Width()) >
rcCurObj.Width() / 2) {
return false;
}
if (pTextObj2->GetFontSize() != pTextObj1->GetFontSize())
return false;
}
int nPreCount = pTextObj2->CountItems();
int nCurCount = pTextObj1->CountItems();
if (nPreCount != nCurCount)
return false;
// If both objects have no items, consider them same.
if (!nPreCount)
return true;
CPDF_TextObjectItem itemPer;
CPDF_TextObjectItem itemCur;
for (int i = 0; i < nPreCount; i++) {
pTextObj2->GetItemInfo(i, &itemPer);
pTextObj1->GetItemInfo(i, &itemCur);
if (itemCur.m_CharCode != itemPer.m_CharCode)
return false;
}
CFX_PointF diff = pTextObj1->GetPos() - pTextObj2->GetPos();
FX_FLOAT font_size = pTextObj2->GetFontSize();
FX_FLOAT char_size = GetCharWidth(itemPer.m_CharCode, pTextObj2->GetFont());
FX_FLOAT max_pre_size =
std::max(std::max(rcPreObj.Height(), rcPreObj.Width()), font_size);
if (FXSYS_fabs(diff.x) > char_size * font_size / 1000 * 0.9 ||
FXSYS_fabs(diff.y) > max_pre_size / 8) {
return false;
}
return true;
}
bool CPDF_TextPage::IsSameAsPreTextObject(
CPDF_TextObject* pTextObj,
const CPDF_PageObjectList* pObjList,
CPDF_PageObjectList::const_iterator iter) {
int i = 0;
while (i < 5 && iter != pObjList->begin()) {
--iter;
CPDF_PageObject* pOtherObj = iter->get();
if (pOtherObj == pTextObj || !pOtherObj->IsText())
continue;
if (IsSameTextObject(pOtherObj->AsText(), pTextObj))
return true;
++i;
}
return false;
}
bool CPDF_TextPage::GenerateCharInfo(FX_WCHAR unicode, PAGECHAR_INFO& info) {
const PAGECHAR_INFO* preChar;
if (!m_TempCharList.empty())
preChar = &m_TempCharList.back();
else if (!m_CharList.empty())
preChar = &m_CharList.back();
else
return false;
info.m_Index = m_TextBuf.GetLength();
info.m_Unicode = unicode;
info.m_pTextObj = nullptr;
info.m_CharCode = CPDF_Font::kInvalidCharCode;
info.m_Flag = FPDFTEXT_CHAR_GENERATED;
int preWidth = 0;
if (preChar->m_pTextObj && preChar->m_CharCode != -1) {
preWidth =
GetCharWidth(preChar->m_CharCode, preChar->m_pTextObj->GetFont());
}
FX_FLOAT fFontSize = preChar->m_pTextObj ? preChar->m_pTextObj->GetFontSize()
: preChar->m_CharBox.Height();
if (!fFontSize)
fFontSize = kDefaultFontSize;
info.m_Origin = CFX_PointF(
preChar->m_Origin.x + preWidth * (fFontSize) / 1000, preChar->m_Origin.y);
info.m_CharBox = CFX_FloatRect(info.m_Origin.x, info.m_Origin.y,
info.m_Origin.x, info.m_Origin.y);
return true;
}
bool CPDF_TextPage::IsRectIntersect(const CFX_FloatRect& rect1,
const CFX_FloatRect& rect2) {
CFX_FloatRect rect = rect1;
rect.Intersect(rect2);
return !rect.IsEmpty();
}