| // 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_extension.h" |
| #include "core/fxcrt/fx_ucd.h" |
| #include "third_party/base/stl_util.h" |
| |
| namespace { |
| |
| const 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}; |
| |
| float NormalizeThreshold(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; |
| } |
| |
| float CalculateBaseSpace(const CPDF_TextObject* pTextObj, |
| const CFX_Matrix& matrix) { |
| float baseSpace = 0.0; |
| const int nItems = pTextObj->CountItems(); |
| if (pTextObj->m_TextState.GetCharSpace() && nItems >= 3) { |
| bool bAllChar = true; |
| 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)) { |
| float fontsize_h = pTextObj->m_TextState.GetFontSizeH(); |
| 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(wchar_t wch, wchar_t* pDst) { |
| wch = wch & 0xFFFF; |
| wchar_t 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 = (wchar_t)(*pMap++); |
| } else { |
| pMap += wch; |
| } |
| if (pDst) { |
| wchar_t 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; |
| 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 = fabs(point.x - charrect.left) < fabs(point.x - charrect.right) |
| ? fabs(point.x - charrect.left) |
| : fabs(point.x - charrect.right); |
| curYdif = fabs(point.y - charrect.bottom) < fabs(point.y - charrect.top) |
| ? fabs(point.y - charrect.bottom) |
| : 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(); |
| |
| 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 (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 || !pdfium::IndexInBounds(m_CharList, index)) |
| 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, |
| float& left, |
| float& top, |
| float& right, |
| float& bottom) const { |
| if (!m_bIsParsed || !pdfium::IndexInBounds(m_SelRects, rectIndex)) |
| 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); |
| 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 float nSumH = MaskPercentFilled(nHorizontalMask, nStartH, nEndH); |
| if (nSumH > 0.8f) |
| return TextOrientation::Horizontal; |
| |
| const 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(wchar_t 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(wchar_t 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) { |
| wchar_t* pDst = nullptr; |
| FX_STRSIZE nCount = Unicode_GetNormalization(wChar, pDst); |
| if (nCount >= 1) { |
| pDst = FX_Alloc(wchar_t, 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(wchar_t 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); |
| wchar_t* pDst = nullptr; |
| FX_STRSIZE nCount = Unicode_GetNormalization(wChar, pDst); |
| if (nCount >= 1) { |
| pDst = FX_Alloc(wchar_t, 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 (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); |
| 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 = fabs(prev_width); |
| prev_matrix.Concat(prev_Obj.m_formMatrix); |
| prev_width = prev_matrix.TransformDistance(prev_width); |
| pTextObj->GetItemInfo(0, &item); |
| float this_width = GetCharWidth(item.m_CharCode, pTextObj->GetFont()) * |
| pTextObj->GetFontSize() / 1000; |
| this_width = fabs(this_width); |
| |
| CFX_Matrix this_matrix = pTextObj->GetTextMatrix(); |
| this_width = fabs(this_width); |
| this_matrix.Concat(formMatrix); |
| this_width = this_matrix.TransformDistance(this_width); |
| |
| 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 (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++) { |
| wchar_t 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++) { |
| wchar_t 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); |
| } |
| wchar_t* 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); |
| wchar_t wChar = wstrItem.GetAt(0); |
| if ((wstrItem.IsEmpty() || wChar == 0) && item.m_CharCode) |
| wChar = (wchar_t)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 (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 += (wchar_t)item.m_CharCode; |
| wchar_t 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(); |
| 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); |
| |
| 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; |
| |
| float fontsize_h = pTextObj->m_TextState.GetFontSizeH(); |
| spacing = -fontsize_h * item.m_Origin.x / 1000; |
| continue; |
| } |
| float charSpace = pTextObj->m_TextState.GetCharSpace(); |
| if (charSpace > 0.001) |
| spacing += matrix.TransformDistance(charSpace); |
| else if (charSpace < -0.001) |
| spacing -= matrix.TransformDistance(fabs(charSpace)); |
| spacing -= baseSpace; |
| if (spacing && i > 0) { |
| int last_width = 0; |
| float fontsize_h = pTextObj->m_TextState.GetFontSizeH(); |
| uint32_t space_charcode = pFont->CharCodeFromUnicode(' '); |
| 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 = abs(GetCharWidth(item.m_CharCode, pFont)); |
| threshold = |
| this_width > last_width ? (float)this_width : (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<wchar_t>(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); |
| float threshold = charinfo.m_Matrix.TransformXDistance( |
| (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() && |
| fabs(diff.x) < threshold && 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); |
| |
| float dX = fabs(last.m_Origin.x - first.m_Origin.x); |
| float dY = 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(wchar_t curChar) { |
| CFX_WideString strCurText = m_TempTextBuf.MakeString(); |
| if (strCurText.IsEmpty()) |
| strCurText = m_TextBuf.AsStringC(); |
| FX_STRSIZE nCount = strCurText.GetLength(); |
| int nIndex = nCount - 1; |
| wchar_t wcTmp = strCurText.GetAt(nIndex); |
| while (wcTmp == 0x20 && nIndex <= nCount - 1 && nIndex >= 0) |
| wcTmp = strCurText.GetAt(--nIndex); |
| if (0x2D == wcTmp || 0xAD == wcTmp) { |
| if (--nIndex > 0) { |
| wchar_t 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<wchar_t>(item.m_CharCode); |
| wchar_t curChar = wstrItem.GetAt(0); |
| if (WritingMode == TextOrientation::Horizontal) { |
| if (this_rect.Height() > 4.5 && prev_rect.Height() > 4.5) { |
| float top = this_rect.top < prev_rect.top ? this_rect.top : prev_rect.top; |
| 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) { |
| float left = this_rect.left > m_CurlineRect.left ? this_rect.left |
| : m_CurlineRect.left; |
| float right = this_rect.right < m_CurlineRect.right ? this_rect.right |
| : m_CurlineRect.right; |
| if (right <= left) { |
| return IsHyphen(curChar) ? GenerateCharacter::Hyphen |
| : GenerateCharacter::LineBreak; |
| } |
| } |
| } |
| |
| float last_pos = PrevItem.m_Origin.x; |
| int nLastWidth = GetCharWidth(PrevItem.m_CharCode, m_pPreTextObj->GetFont()); |
| float last_width = nLastWidth * m_pPreTextObj->GetFontSize() / 1000; |
| last_width = fabs(last_width); |
| int nThisWidth = GetCharWidth(item.m_CharCode, pObj->GetFont()); |
| float this_width = nThisWidth * pObj->GetFontSize() / 1000; |
| this_width = fabs(this_width); |
| 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) && |
| (fabs(pos.y) < 1 ? fabs(pos.x) < 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); |
| wchar_t preChar = PrevStr.GetAt(PrevStr.GetLength() - 1); |
| CFX_Matrix matrix = pObj->GetTextMatrix(); |
| matrix.Concat(formMatrix); |
| |
| threshold = (float)(nLastWidth > nThisWidth ? nLastWidth : nThisWidth); |
| threshold = threshold > 400 |
| ? (threshold < 700 |
| ? threshold / 4 |
| : (threshold > 800 ? threshold / 6 : threshold / 5)) |
| : (threshold / 2); |
| if (nLastWidth >= nThisWidth) { |
| threshold *= fabs(m_pPreTextObj->GetFontSize()); |
| } else { |
| threshold *= 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 (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()) { |
| float dbXdif = fabs(rcPreObj.left - rcCurObj.left); |
| size_t nCount = m_CharList.size(); |
| if (nCount >= 2) { |
| PAGECHAR_INFO perCharTemp = m_CharList[nCount - 2]; |
| 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 (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(); |
| float font_size = pTextObj2->GetFontSize(); |
| float char_size = GetCharWidth(itemPer.m_CharCode, pTextObj2->GetFont()); |
| float max_pre_size = |
| std::max(std::max(rcPreObj.Height(), rcPreObj.Width()), font_size); |
| if (fabs(diff.x) > char_size * font_size / 1000 * 0.9 || |
| 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(wchar_t 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()); |
| } |
| |
| 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(); |
| } |
