diff options
Diffstat (limited to 'core/fpdftext/cpdf_textpage.cpp')
| -rw-r--r-- | core/fpdftext/cpdf_textpage.cpp | 1549 |
1 files changed, 1549 insertions, 0 deletions
diff --git a/core/fpdftext/cpdf_textpage.cpp b/core/fpdftext/cpdf_textpage.cpp new file mode 100644 index 0000000000..3981cfee40 --- /dev/null +++ b/core/fpdftext/cpdf_textpage.cpp @@ -0,0 +1,1549 @@ +// 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/include/cpdf_textpage.h" + +#include <algorithm> +#include <utility> +#include <vector> + +#include "core/fpdfapi/fpdf_font/include/cpdf_font.h" +#include "core/fpdfapi/fpdf_page/include/cpdf_form.h" +#include "core/fpdfapi/fpdf_page/include/cpdf_formobject.h" +#include "core/fpdfapi/fpdf_page/include/cpdf_page.h" +#include "core/fpdfapi/fpdf_page/include/cpdf_pageobject.h" +#include "core/fpdfapi/fpdf_page/include/cpdf_textobject.h" +#include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h" +#include "core/fpdfapi/fpdf_parser/include/cpdf_string.h" +#include "core/fpdftext/unicodenormalizationdata.h" +#include "core/fxcrt/fx_bidi.h" +#include "core/fxcrt/include/fx_ext.h" +#include "core/fxcrt/include/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.GetObject()->m_CharSpace && nItems >= 3) { + bool bAllChar = true; + FX_FLOAT spacing = matrix.TransformDistance( + pTextObj->m_TextState.GetObject()->m_CharSpace); + 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_OriginX / 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 + +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); + pPage->GetDisplayMatrix(m_DisplayMatrix, 0, 0, (int)pPage->GetPageWidth(), + (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) { + FX_FLOAT orgX = info_curchar.m_OriginX, orgY = info_curchar.m_OriginY; + CFX_Matrix matrix, matrix_reverse; + info_curchar.m_pTextObj->GetTextMatrix(&matrix); + matrix.Concat(info_curchar.m_Matrix); + matrix_reverse.SetReverse(matrix); + matrix_reverse.Transform(orgX, orgY); + rect.left = info_curchar.m_CharBox.left; + rect.right = info_curchar.m_CharBox.right; + if (pCurObj->GetFont()->GetTypeDescent()) { + rect.bottom = orgY + + pCurObj->GetFont()->GetTypeDescent() * + pCurObj->GetFontSize() / 1000; + FX_FLOAT xPosTemp = orgX; + matrix.Transform(xPosTemp, rect.bottom); + } else { + rect.bottom = info_curchar.m_CharBox.bottom; + } + if (pCurObj->GetFont()->GetTypeAscent()) { + rect.top = + orgY + + pCurObj->GetFont()->GetTypeAscent() * pCurObj->GetFontSize() / 1000; + FX_FLOAT xPosTemp = + orgX + + GetCharWidth(info_curchar.m_CharCode, pCurObj->GetFont()) * + pCurObj->GetFontSize() / 1000; + matrix.Transform(xPosTemp, rect.top); + } 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(CFX_FloatPoint point, + FX_FLOAT xTolerance, + FX_FLOAT yTolerance) 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.x, point.y)) + break; + if (xTolerance > 0 || yTolerance > 0) { + CFX_FloatRect charRectExt; + charrect.Normalize(); + charRectExt.left = charrect.left - xTolerance / 2; + charRectExt.right = charrect.right + xTolerance / 2; + charRectExt.top = charrect.top + yTolerance / 2; + charRectExt.bottom = charrect.bottom - yTolerance / 2; + if (charRectExt.Contains(point.x, point.y)) { + 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_OriginY) > 0 && !IsContainPreChar && + IsAddLineFeed) { + posy = charinfo.m_OriginY; + 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; +} + +int CPDF_TextPage::GetIndexAtPos(FX_FLOAT x, + FX_FLOAT y, + FX_FLOAT xTolerance, + FX_FLOAT yTolerance) const { + CFX_FloatPoint point(x, y); + return GetIndexAtPos(point, xTolerance, yTolerance); +} + +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_OriginX = charinfo.m_OriginX; + info->m_OriginY = charinfo.m_OriginY; + 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.Copy(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()); + 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.Copy(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 (int i = 0; i < m_LineObj.GetSize(); i++) + ProcessTextObject(m_LineObj.GetAt(i)); + + m_LineObj.RemoveAll(); + 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.Copy(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) { + CFX_FloatRect re(pTextObj->m_Left, pTextObj->m_Bottom, pTextObj->m_Right, + pTextObj->m_Top); + if (FXSYS_fabs(pTextObj->m_Right - pTextObj->m_Left) < 0.01f) + return; + int count = m_LineObj.GetSize(); + PDFTEXT_Obj Obj; + Obj.m_pTextObj = pTextObj; + Obj.m_formMatrix = formMatrix; + if (count == 0) { + m_LineObj.Add(Obj); + return; + } + if (IsSameAsPreTextObject(pTextObj, pObjList, ObjPos)) + return; + PDFTEXT_Obj prev_Obj = m_LineObj.GetAt(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_matrix); + 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_matrix); + 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; + FX_FLOAT prev_x = prev_Obj.m_pTextObj->GetPosX(), + prev_y = prev_Obj.m_pTextObj->GetPosY(); + prev_Obj.m_formMatrix.Transform(prev_x, prev_y); + m_DisplayMatrix.Transform(prev_x, prev_y); + FX_FLOAT this_x = pTextObj->GetPosX(), this_y = pTextObj->GetPosY(); + formMatrix.Transform(this_x, this_y); + m_DisplayMatrix.Transform(this_x, this_y); + if (FXSYS_fabs(this_y - prev_y) > threshold * 2) { + for (int i = 0; i < count; i++) + ProcessTextObject(m_LineObj.GetAt(i)); + m_LineObj.RemoveAll(); + m_LineObj.Add(Obj); + return; + } + int i = 0; + for (i = count - 1; i >= 0; i--) { + PDFTEXT_Obj prev_text_obj = m_LineObj.GetAt(i); + FX_FLOAT Prev_x = prev_text_obj.m_pTextObj->GetPosX(), + Prev_y = prev_text_obj.m_pTextObj->GetPosY(); + prev_text_obj.m_formMatrix.Transform(Prev_x, Prev_y); + m_DisplayMatrix.Transform(Prev_x, Prev_y); + if (this_x >= Prev_x) { + if (i == count - 1) + m_LineObj.Add(Obj); + else + m_LineObj.InsertAt(i + 1, Obj); + break; + } + } + if (i < 0) + m_LineObj.InsertAt(0, Obj); +} + +FPDFText_MarkedContent CPDF_TextPage::PreMarkedContent(PDFTEXT_Obj Obj) { + CPDF_TextObject* pTextObj = Obj.m_pTextObj; + const CPDF_ContentMarkData* pMarkData = pTextObj->m_ContentMark.GetObject(); + if (!pMarkData) + return FPDFText_MarkedContent::Pass; + + int nContentMark = pMarkData->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 = pMarkData->GetItem(n); + if (item.GetParamType() == CPDF_ContentMarkItem::ParamType::None) + continue; + pDict = item.GetParam(); + CPDF_String* temp = + ToString(pDict ? pDict->GetObjectBy("ActualText") : nullptr); + if (temp) { + bExist = true; + actText = temp->GetUnicodeText(); + } + } + if (!bExist) + return FPDFText_MarkedContent::Pass; + + if (m_pPreTextObj) { + const CPDF_ContentMarkData* pPreMarkData = + m_pPreTextObj->m_ContentMark.GetObject(); + if (pPreMarkData && pPreMarkData->CountItems() == n && + pDict == pPreMarkData->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; + const CPDF_ContentMarkData* pMarkData = pTextObj->m_ContentMark.GetObject(); + if (!pMarkData) + return; + + int nContentMark = pMarkData->CountItems(); + if (nContentMark < 1) + return; + CFX_WideString actText; + CPDF_Dictionary* pDict = nullptr; + for (int n = 0; n < nContentMark; n++) { + const CPDF_ContentMarkItem& item = pMarkData->GetItem(n); + if (item.GetParamType() == CPDF_ContentMarkItem::ParamType::None) + continue; + pDict = item.GetParam(); + if (pDict) + actText = pDict->GetUnicodeTextBy("ActualText"); + } + FX_STRSIZE nItems = actText.GetLength(); + if (nItems < 1) + return; + + CPDF_Font* pFont = pTextObj->GetFont(); + CFX_Matrix formMatrix = Obj.m_formMatrix; + CFX_Matrix matrix; + pTextObj->GetTextMatrix(&matrix); + matrix.Concat(formMatrix); + FX_FLOAT fPosX = pTextObj->GetPosX(); + FX_FLOAT fPosY = pTextObj->GetPosY(); + int nCharInfoIndex = m_TextBuf.GetLength(); + CFX_FloatRect charBox; + charBox.top = pTextObj->m_Top; + charBox.left = pTextObj->m_Left; + charBox.right = pTextObj->m_Right; + charBox.bottom = pTextObj->m_Bottom; + 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_OriginX = fPosX; + charinfo.m_OriginY = fPosY; + charinfo.m_Index = nCharInfoIndex; + charinfo.m_Unicode = wChar; + charinfo.m_CharCode = pFont->CharCodeFromUnicode(wChar); + charinfo.m_Flag = FPDFTEXT_CHAR_PIECE; + charinfo.m_pTextObj = pTextObj; + charinfo.m_CharBox.top = charBox.top; + charinfo.m_CharBox.left = charBox.left; + charinfo.m_CharBox.right = charBox.right; + charinfo.m_CharBox.bottom = charBox.bottom; + charinfo.m_Matrix.Copy(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]); +} + +FX_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); + matrix.Concat(formMatrix); + FPDFText_MarkedContent ePreMKC = PreMarkedContent(Obj); + if (ePreMKC == FPDFText_MarkedContent::Done) { + m_pPreTextObj = pTextObj; + m_perMatrix.Copy(formMatrix); + return; + } + GenerateCharacter result = GenerateCharacter::None; + if (m_pPreTextObj) { + result = ProcessInsertObject(pTextObj, formMatrix); + if (result == GenerateCharacter::LineBreak) { + m_CurlineRect = + CFX_FloatRect(Obj.m_pTextObj->m_Left, Obj.m_pTextObj->m_Bottom, + Obj.m_pTextObj->m_Right, Obj.m_pTextObj->m_Top); + } else { + m_CurlineRect.Union( + CFX_FloatRect(Obj.m_pTextObj->m_Left, Obj.m_pTextObj->m_Bottom, + Obj.m_pTextObj->m_Right, Obj.m_pTextObj->m_Top)); + } + switch (result) { + case GenerateCharacter::None: + break; + case GenerateCharacter::Space: { + PAGECHAR_INFO generateChar; + if (GenerateCharInfo(TEXT_SPACE_CHAR, generateChar)) { + if (!formMatrix.IsIdentity()) + generateChar.m_Matrix.Copy(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 = + CFX_FloatRect(Obj.m_pTextObj->m_Left, Obj.m_pTextObj->m_Bottom, + Obj.m_pTextObj->m_Right, Obj.m_pTextObj->m_Top); + } + if (ePreMKC == FPDFText_MarkedContent::Delay) { + ProcessMarkedContent(Obj); + m_pPreTextObj = pTextObj; + m_perMatrix.Copy(formMatrix); + return; + } + m_pPreTextObj = pTextObj; + m_perMatrix.Copy(formMatrix); + int nItems = pTextObj->CountItems(); + FX_FLOAT baseSpace = CalculateBaseSpace(pTextObj, matrix); + + const FX_BOOL bR2L = IsRightToLeft(pTextObj, pFont, nItems); + const FX_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; + charinfo.m_OriginX = 0; + charinfo.m_OriginY = 0; + 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_OriginX / 1000; + continue; + } + FX_FLOAT charSpace = pTextObj->m_TextState.GetObject()->m_CharSpace; + 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.Copy(formMatrix); + matrix.Transform(item.m_OriginX, item.m_OriginY, charinfo.m_OriginX, + charinfo.m_OriginY); + charinfo.m_CharBox = + CFX_FloatRect(charinfo.m_OriginX, charinfo.m_OriginY, + charinfo.m_OriginX, charinfo.m_OriginY); + 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; + FX_WCHAR wChar = wstrItem.GetAt(0); + if ((wstrItem.IsEmpty() || wChar == 0) && item.m_CharCode) { + if (wstrItem.IsEmpty()) + wstrItem += (FX_WCHAR)item.m_CharCode; + else + wstrItem.SetAt(0, (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_OriginX = 0, charinfo.m_OriginY = 0; + matrix.Transform(item.m_OriginX, item.m_OriginY, charinfo.m_OriginX, + charinfo.m_OriginY); + FX_RECT rect = + charinfo.m_pTextObj->GetFont()->GetCharBBox(charinfo.m_CharCode); + charinfo.m_CharBox.top = + rect.top * pTextObj->GetFontSize() / 1000 + item.m_OriginY; + charinfo.m_CharBox.left = + rect.left * pTextObj->GetFontSize() / 1000 + item.m_OriginX; + charinfo.m_CharBox.right = + rect.right * pTextObj->GetFontSize() / 1000 + item.m_OriginX; + charinfo.m_CharBox.bottom = + rect.bottom * pTextObj->GetFontSize() / 1000 + item.m_OriginY; + 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.Copy(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]; + if (charinfo1.m_CharCode == charinfo.m_CharCode && + charinfo1.m_pTextObj->GetFont() == charinfo.m_pTextObj->GetFont() && + FXSYS_fabs(charinfo1.m_OriginX - charinfo.m_OriginX) < threshold && + FXSYS_fabs(charinfo1.m_OriginY - charinfo.m_OriginY) < 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(&textMatrix); + textMatrix.TransformPoint(first.m_OriginX, first.m_OriginY); + textMatrix.TransformPoint(last.m_OriginX, last.m_OriginY); + FX_FLOAT dX = FXSYS_fabs(last.m_OriginX - first.m_OriginX); + FX_FLOAT dY = FXSYS_fabs(last.m_OriginY - first.m_OriginY); + 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; +} + +FX_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->m_Left, pObj->m_Bottom, pObj->m_Right, + pObj->m_Top); + CFX_FloatRect prev_rect(m_pPreTextObj->m_Left, m_pPreTextObj->m_Bottom, + m_pPreTextObj->m_Right, m_pPreTextObj->m_Top); + CPDF_TextObjectItem PrevItem, 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_OriginX; + 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, prev_reverse; + m_pPreTextObj->GetTextMatrix(&prev_matrix); + prev_matrix.Concat(m_perMatrix); + prev_reverse.SetReverse(prev_matrix); + FX_FLOAT x = pObj->GetPosX(); + FX_FLOAT y = pObj->GetPosY(); + formMatrix.Transform(x, y); + prev_reverse.Transform(x, y); + 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->m_Left, m_pPreTextObj->m_Bottom, + m_pPreTextObj->m_Right, m_pPreTextObj->m_Top); + CFX_FloatRect rect3 = rect1; + rect1.Intersect(rect2); + if ((rect1.IsEmpty() && rect2.Height() > 5 && rect3.Height() > 5) || + ((y > threshold * 2 || y < threshold * -3) && + (FXSYS_fabs(y) < 1 ? FXSYS_fabs(x) < FXSYS_fabs(y) : TRUE))) { + bNewline = true; + if (nItem > 1) { + CPDF_TextObjectItem tempItem; + m_pPreTextObj->GetItemInfo(0, &tempItem); + CFX_Matrix m; + m_pPreTextObj->GetTextMatrix(&m); + if (PrevItem.m_OriginX > tempItem.m_OriginX && + 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->GetPosX(), pObj->GetPosY())) { + bNewline = false; + } else { + CFX_FloatRect rect(0, pObj->m_Bottom, 1000, pObj->m_Top); + if (rect.Contains(m_pPreTextObj->GetPosX(), + m_pPreTextObj->GetPosY())) { + 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); + 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 - x) > threshold && curChar != L' ' && + preChar != L' ') { + if (curChar != L' ' && preChar != L' ') { + if ((x - last_pos - last_width) > threshold || + (last_pos - x - last_width) > threshold) { + return GenerateCharacter::Space; + } + if (x < 0 && (last_pos - x - last_width) > threshold) + return GenerateCharacter::Space; + if ((x - last_pos - last_width) > this_width || + (x - last_pos - this_width) > last_width) { + return GenerateCharacter::Space; + } + } + } + return GenerateCharacter::None; +} + +FX_BOOL CPDF_TextPage::IsSameTextObject(CPDF_TextObject* pTextObj1, + CPDF_TextObject* pTextObj2) { + if (!pTextObj1 || !pTextObj2) + return FALSE; + CFX_FloatRect rcPreObj(pTextObj2->m_Left, pTextObj2->m_Bottom, + pTextObj2->m_Right, pTextObj2->m_Top); + CFX_FloatRect rcCurObj(pTextObj1->m_Left, pTextObj1->m_Bottom, + pTextObj1->m_Right, pTextObj1->m_Top); + 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 = {0, 0.0f, 0.0f}; + CPDF_TextObjectItem itemCur = {0, 0.0f, 0.0f}; + for (int i = 0; i < nPreCount; i++) { + pTextObj2->GetItemInfo(i, &itemPer); + pTextObj1->GetItemInfo(i, &itemCur); + if (itemCur.m_CharCode != itemPer.m_CharCode) + return FALSE; + } + if (FXSYS_fabs(pTextObj1->GetPosX() - pTextObj2->GetPosX()) > + GetCharWidth(itemPer.m_CharCode, pTextObj2->GetFont()) * + pTextObj2->GetFontSize() / 1000 * 0.9 || + FXSYS_fabs(pTextObj1->GetPosY() - pTextObj2->GetPosY()) > + std::max(std::max(rcPreObj.Height(), rcPreObj.Width()), + pTextObj2->GetFontSize()) / + 8) { + return FALSE; + } + return TRUE; +} + +FX_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; +} + +FX_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_OriginX = preChar->m_OriginX + preWidth * (fFontSize) / 1000; + info.m_OriginY = preChar->m_OriginY; + info.m_CharBox = CFX_FloatRect(info.m_OriginX, info.m_OriginY, info.m_OriginX, + info.m_OriginY); + return TRUE; +} + +FX_BOOL CPDF_TextPage::IsRectIntersect(const CFX_FloatRect& rect1, + const CFX_FloatRect& rect2) { + CFX_FloatRect rect = rect1; + rect.Intersect(rect2); + return !rect.IsEmpty(); +} |