diff options
Diffstat (limited to 'fpdfsdk/fpdfppo.cpp')
-rw-r--r-- | fpdfsdk/fpdfppo.cpp | 359 |
1 files changed, 177 insertions, 182 deletions
diff --git a/fpdfsdk/fpdfppo.cpp b/fpdfsdk/fpdfppo.cpp index 786bc46611..705c7e21da 100644 --- a/fpdfsdk/fpdfppo.cpp +++ b/fpdfsdk/fpdfppo.cpp @@ -18,49 +18,149 @@ #include "core/fpdfapi/parser/cpdf_stream.h" #include "core/fpdfapi/parser/cpdf_string.h" #include "fpdfsdk/fsdk_define.h" +#include "third_party/base/ptr_util.h" #include "third_party/base/stl_util.h" +namespace { + +CPDF_Object* PageDictGetInheritableTag(CPDF_Dictionary* pDict, + const CFX_ByteString& bsSrcTag) { + if (!pDict || bsSrcTag.IsEmpty()) + return nullptr; + if (!pDict->KeyExist("Parent") || !pDict->KeyExist("Type")) + return nullptr; + + CPDF_Object* pType = pDict->GetObjectFor("Type")->GetDirect(); + if (!ToName(pType)) + return nullptr; + if (pType->GetString().Compare("Page")) + return nullptr; + + CPDF_Dictionary* pp = + ToDictionary(pDict->GetObjectFor("Parent")->GetDirect()); + if (!pp) + return nullptr; + + if (pDict->KeyExist(bsSrcTag)) + return pDict->GetObjectFor(bsSrcTag); + + while (pp) { + if (pp->KeyExist(bsSrcTag)) + return pp->GetObjectFor(bsSrcTag); + if (!pp->KeyExist("Parent")) + break; + pp = ToDictionary(pp->GetObjectFor("Parent")->GetDirect()); + } + return nullptr; +} + +bool CopyInheritable(CPDF_Dictionary* pCurPageDict, + CPDF_Dictionary* pSrcPageDict, + const CFX_ByteString& key) { + if (pCurPageDict->KeyExist(key)) + return true; + + CPDF_Object* pInheritable = PageDictGetInheritableTag(pSrcPageDict, key); + if (!pInheritable) + return false; + + pCurPageDict->SetFor(key, pInheritable->Clone().release()); + return true; +} + +bool ParserPageRangeString(CFX_ByteString rangstring, + std::vector<uint16_t>* pageArray, + int nCount) { + if (rangstring.IsEmpty()) + return true; + + rangstring.Remove(' '); + int nLength = rangstring.GetLength(); + CFX_ByteString cbCompareString("0123456789-,"); + for (int i = 0; i < nLength; ++i) { + if (cbCompareString.Find(rangstring[i]) == -1) + return false; + } + + CFX_ByteString cbMidRange; + int nStringFrom = 0; + int nStringTo = 0; + while (nStringTo < nLength) { + nStringTo = rangstring.Find(',', nStringFrom); + if (nStringTo == -1) + nStringTo = nLength; + cbMidRange = rangstring.Mid(nStringFrom, nStringTo - nStringFrom); + int nMid = cbMidRange.Find('-'); + if (nMid == -1) { + long lPageNum = atol(cbMidRange.c_str()); + if (lPageNum <= 0 || lPageNum > nCount) + return false; + pageArray->push_back((uint16_t)lPageNum); + } else { + int nStartPageNum = atol(cbMidRange.Mid(0, nMid).c_str()); + if (nStartPageNum == 0) + return false; + + ++nMid; + int nEnd = cbMidRange.GetLength() - nMid; + if (nEnd == 0) + return false; + + int nEndPageNum = atol(cbMidRange.Mid(nMid, nEnd).c_str()); + if (nStartPageNum < 0 || nStartPageNum > nEndPageNum || + nEndPageNum > nCount) { + return false; + } + for (int i = nStartPageNum; i <= nEndPageNum; ++i) { + pageArray->push_back(i); + } + } + nStringFrom = nStringTo + 1; + } + return true; +} + +} // namespace + class CPDF_PageOrganizer { public: - using ObjectNumberMap = std::map<uint32_t, uint32_t>; - CPDF_PageOrganizer(); + CPDF_PageOrganizer(CPDF_Document* pDestPDFDoc, CPDF_Document* pSrcPDFDoc); ~CPDF_PageOrganizer(); - bool PDFDocInit(CPDF_Document* pDestPDFDoc, CPDF_Document* pSrcPDFDoc); - bool ExportPage(CPDF_Document* pSrcPDFDoc, - std::vector<uint16_t>* pPageNums, - CPDF_Document* pDestPDFDoc, - int nIndex); - CPDF_Object* PageDictGetInheritableTag(CPDF_Dictionary* pDict, - const CFX_ByteString& bsSrctag); - bool UpdateReference(CPDF_Object* pObj, - CPDF_Document* pDoc, - ObjectNumberMap* pObjNumberMap); - uint32_t GetNewObjId(CPDF_Document* pDoc, - ObjectNumberMap* pObjNumberMap, - CPDF_Reference* pRef); + bool PDFDocInit(); + bool ExportPage(const std::vector<uint16_t>& pageNums, int nIndex); + + private: + using ObjectNumberMap = std::map<uint32_t, uint32_t>; + + bool UpdateReference(CPDF_Object* pObj, ObjectNumberMap* pObjNumberMap); + uint32_t GetNewObjId(ObjectNumberMap* pObjNumberMap, CPDF_Reference* pRef); + + CPDF_Document* m_pDestPDFDoc; + CPDF_Document* m_pSrcPDFDoc; }; -CPDF_PageOrganizer::CPDF_PageOrganizer() {} +CPDF_PageOrganizer::CPDF_PageOrganizer(CPDF_Document* pDestPDFDoc, + CPDF_Document* pSrcPDFDoc) + : m_pDestPDFDoc(pDestPDFDoc), m_pSrcPDFDoc(pSrcPDFDoc) {} CPDF_PageOrganizer::~CPDF_PageOrganizer() {} -bool CPDF_PageOrganizer::PDFDocInit(CPDF_Document* pDestPDFDoc, - CPDF_Document* pSrcPDFDoc) { - if (!pDestPDFDoc || !pSrcPDFDoc) - return false; +bool CPDF_PageOrganizer::PDFDocInit() { + ASSERT(m_pDestPDFDoc); + ASSERT(m_pSrcPDFDoc); - CPDF_Dictionary* pNewRoot = pDestPDFDoc->GetRoot(); + CPDF_Dictionary* pNewRoot = m_pDestPDFDoc->GetRoot(); if (!pNewRoot) return false; - CPDF_Dictionary* DInfoDict = pDestPDFDoc->GetInfo(); - if (!DInfoDict) + CPDF_Dictionary* pDocInfoDict = m_pDestPDFDoc->GetInfo(); + if (!pDocInfoDict) return false; CFX_ByteString producerstr; producerstr.Format("PDFium"); - DInfoDict->SetFor("Producer", new CPDF_String(producerstr, false)); + pDocInfoDict->SetFor("Producer", new CPDF_String(producerstr, false)); CFX_ByteString cbRootType = pNewRoot->GetStringFor("Type", ""); if (cbRootType.IsEmpty()) @@ -70,35 +170,33 @@ bool CPDF_PageOrganizer::PDFDocInit(CPDF_Document* pDestPDFDoc, CPDF_Dictionary* pNewPages = pElement ? ToDictionary(pElement->GetDirect()) : nullptr; if (!pNewPages) { - pNewPages = new CPDF_Dictionary(pDestPDFDoc->GetByteStringPool()); - pNewRoot->SetReferenceFor("Pages", pDestPDFDoc, - pDestPDFDoc->AddIndirectObject(pNewPages)); + pNewPages = new CPDF_Dictionary(m_pDestPDFDoc->GetByteStringPool()); + pNewRoot->SetReferenceFor("Pages", m_pDestPDFDoc, + m_pDestPDFDoc->AddIndirectObject(pNewPages)); } CFX_ByteString cbPageType = pNewPages->GetStringFor("Type", ""); - if (cbPageType == "") { + if (cbPageType.IsEmpty()) pNewPages->SetFor("Type", new CPDF_Name("Pages")); - } if (!pNewPages->GetArrayFor("Kids")) { pNewPages->SetIntegerFor("Count", 0); - pNewPages->SetReferenceFor("Kids", pDestPDFDoc, - pDestPDFDoc->AddIndirectObject(new CPDF_Array)); + pNewPages->SetReferenceFor( + "Kids", m_pDestPDFDoc, + m_pDestPDFDoc->AddIndirectObject(new CPDF_Array)); } return true; } -bool CPDF_PageOrganizer::ExportPage(CPDF_Document* pSrcPDFDoc, - std::vector<uint16_t>* pPageNums, - CPDF_Document* pDestPDFDoc, +bool CPDF_PageOrganizer::ExportPage(const std::vector<uint16_t>& pageNums, int nIndex) { int curpage = nIndex; - std::unique_ptr<ObjectNumberMap> pObjNumberMap(new ObjectNumberMap); - int nSize = pdfium::CollectionSize<int>(*pPageNums); + auto pObjNumberMap = pdfium::MakeUnique<ObjectNumberMap>(); + int nSize = pdfium::CollectionSize<int>(pageNums); for (int i = 0; i < nSize; ++i) { - CPDF_Dictionary* pCurPageDict = pDestPDFDoc->CreateNewPage(curpage); - CPDF_Dictionary* pSrcPageDict = pSrcPDFDoc->GetPage(pPageNums->at(i) - 1); + CPDF_Dictionary* pCurPageDict = m_pDestPDFDoc->CreateNewPage(curpage); + CPDF_Dictionary* pSrcPageDict = m_pSrcPDFDoc->GetPage(pageNums[i] - 1); if (!pSrcPageDict || !pCurPageDict) return false; @@ -106,110 +204,61 @@ bool CPDF_PageOrganizer::ExportPage(CPDF_Document* pSrcPDFDoc, for (const auto& it : *pSrcPageDict) { const CFX_ByteString& cbSrcKeyStr = it.first; CPDF_Object* pObj = it.second; - if (cbSrcKeyStr.Compare(("Type")) && cbSrcKeyStr.Compare(("Parent"))) { - if (pCurPageDict->KeyExist(cbSrcKeyStr)) - pCurPageDict->RemoveFor(cbSrcKeyStr); - pCurPageDict->SetFor(cbSrcKeyStr, pObj->Clone().release()); - } + if (cbSrcKeyStr == "Type" || cbSrcKeyStr == "Parent") + continue; + + pCurPageDict->SetFor(cbSrcKeyStr, pObj->Clone().release()); } // inheritable item - CPDF_Object* pInheritable = nullptr; - // 1 MediaBox //required - if (!pCurPageDict->KeyExist("MediaBox")) { - pInheritable = PageDictGetInheritableTag(pSrcPageDict, "MediaBox"); - if (!pInheritable) { - // Search the "CropBox" from source page dictionary, - // if not exists,we take the letter size. - pInheritable = PageDictGetInheritableTag(pSrcPageDict, "CropBox"); - if (pInheritable) { - pCurPageDict->SetFor("MediaBox", pInheritable->Clone().release()); - } else { - // Make the default size to be letter size (8.5'x11') - CPDF_Array* pArray = new CPDF_Array; - pArray->AddNumber(0); - pArray->AddNumber(0); - pArray->AddNumber(612); - pArray->AddNumber(792); - pCurPageDict->SetFor("MediaBox", pArray); - } - } else { + // 1 MediaBox - required + if (!CopyInheritable(pCurPageDict, pSrcPageDict, "MediaBox")) { + // Search for "CropBox" in the source page dictionary, + // if it does not exists, use the default letter size. + CPDF_Object* pInheritable = + PageDictGetInheritableTag(pSrcPageDict, "CropBox"); + if (pInheritable) { pCurPageDict->SetFor("MediaBox", pInheritable->Clone().release()); + } else { + // Make the default size to be letter size (8.5'x11') + CPDF_Array* pArray = new CPDF_Array; + pArray->AddNumber(0); + pArray->AddNumber(0); + pArray->AddNumber(612); + pArray->AddNumber(792); + pCurPageDict->SetFor("MediaBox", pArray); } } - // 2 Resources //required - if (!pCurPageDict->KeyExist("Resources")) { - pInheritable = PageDictGetInheritableTag(pSrcPageDict, "Resources"); - if (!pInheritable) - return false; - pCurPageDict->SetFor("Resources", pInheritable->Clone().release()); - } - // 3 CropBox //Optional - if (!pCurPageDict->KeyExist("CropBox")) { - pInheritable = PageDictGetInheritableTag(pSrcPageDict, "CropBox"); - if (pInheritable) - pCurPageDict->SetFor("CropBox", pInheritable->Clone().release()); - } - // 4 Rotate //Optional - if (!pCurPageDict->KeyExist("Rotate")) { - pInheritable = PageDictGetInheritableTag(pSrcPageDict, "Rotate"); - if (pInheritable) - pCurPageDict->SetFor("Rotate", pInheritable->Clone().release()); - } + + // 2 Resources - required + if (!CopyInheritable(pCurPageDict, pSrcPageDict, "Resources")) + return false; + + // 3 CropBox - optional + CopyInheritable(pCurPageDict, pSrcPageDict, "CropBox"); + // 4 Rotate - optional + CopyInheritable(pCurPageDict, pSrcPageDict, "Rotate"); // Update the reference uint32_t dwOldPageObj = pSrcPageDict->GetObjNum(); uint32_t dwNewPageObj = pCurPageDict->GetObjNum(); (*pObjNumberMap)[dwOldPageObj] = dwNewPageObj; - UpdateReference(pCurPageDict, pDestPDFDoc, pObjNumberMap.get()); + UpdateReference(pCurPageDict, pObjNumberMap.get()); ++curpage; } return true; } -CPDF_Object* CPDF_PageOrganizer::PageDictGetInheritableTag( - CPDF_Dictionary* pDict, - const CFX_ByteString& bsSrcTag) { - if (!pDict || bsSrcTag.IsEmpty()) - return nullptr; - if (!pDict->KeyExist("Parent") || !pDict->KeyExist("Type")) - return nullptr; - - CPDF_Object* pType = pDict->GetObjectFor("Type")->GetDirect(); - if (!ToName(pType)) - return nullptr; - if (pType->GetString().Compare("Page")) - return nullptr; - - CPDF_Dictionary* pp = - ToDictionary(pDict->GetObjectFor("Parent")->GetDirect()); - if (!pp) - return nullptr; - - if (pDict->KeyExist(bsSrcTag)) - return pDict->GetObjectFor(bsSrcTag); - - while (pp) { - if (pp->KeyExist(bsSrcTag)) - return pp->GetObjectFor(bsSrcTag); - if (!pp->KeyExist("Parent")) - break; - pp = ToDictionary(pp->GetObjectFor("Parent")->GetDirect()); - } - return nullptr; -} - bool CPDF_PageOrganizer::UpdateReference(CPDF_Object* pObj, - CPDF_Document* pDoc, ObjectNumberMap* pObjNumberMap) { switch (pObj->GetType()) { case CPDF_Object::REFERENCE: { CPDF_Reference* pReference = pObj->AsReference(); - uint32_t newobjnum = GetNewObjId(pDoc, pObjNumberMap, pReference); + uint32_t newobjnum = GetNewObjId(pObjNumberMap, pReference); if (newobjnum == 0) return false; - pReference->SetRef(pDoc, newobjnum); + pReference->SetRef(m_pDestPDFDoc, newobjnum); break; } case CPDF_Object::DICTIONARY: { @@ -223,7 +272,7 @@ bool CPDF_PageOrganizer::UpdateReference(CPDF_Object* pObj, continue; if (!pNextObj) return false; - if (!UpdateReference(pNextObj, pDoc, pObjNumberMap)) + if (!UpdateReference(pNextObj, pObjNumberMap)) pDict->RemoveFor(key); } break; @@ -234,7 +283,7 @@ bool CPDF_PageOrganizer::UpdateReference(CPDF_Object* pObj, CPDF_Object* pNextObj = pArray->GetObjectAt(i); if (!pNextObj) return false; - if (!UpdateReference(pNextObj, pDoc, pObjNumberMap)) + if (!UpdateReference(pNextObj, pObjNumberMap)) return false; } break; @@ -242,12 +291,10 @@ bool CPDF_PageOrganizer::UpdateReference(CPDF_Object* pObj, case CPDF_Object::STREAM: { CPDF_Stream* pStream = pObj->AsStream(); CPDF_Dictionary* pDict = pStream->GetDict(); - if (pDict) { - if (!UpdateReference(pDict, pDoc, pObjNumberMap)) - return false; - } else { + if (!pDict) + return false; + if (!UpdateReference(pDict, pObjNumberMap)) return false; - } break; } default: @@ -257,8 +304,7 @@ bool CPDF_PageOrganizer::UpdateReference(CPDF_Object* pObj, return true; } -uint32_t CPDF_PageOrganizer::GetNewObjId(CPDF_Document* pDoc, - ObjectNumberMap* pObjNumberMap, +uint32_t CPDF_PageOrganizer::GetNewObjId(ObjectNumberMap* pObjNumberMap, CPDF_Reference* pRef) { if (!pRef) return 0; @@ -286,64 +332,14 @@ uint32_t CPDF_PageOrganizer::GetNewObjId(CPDF_Document* pDoc, } } CPDF_Object* pUnownedClone = pClone.get(); - dwNewObjNum = pDoc->AddIndirectObject(pClone.release()); + dwNewObjNum = m_pDestPDFDoc->AddIndirectObject(pClone.release()); (*pObjNumberMap)[dwObjnum] = dwNewObjNum; - if (!UpdateReference(pUnownedClone, pDoc, pObjNumberMap)) + if (!UpdateReference(pUnownedClone, pObjNumberMap)) return 0; return dwNewObjNum; } -FPDF_BOOL ParserPageRangeString(CFX_ByteString rangstring, - std::vector<uint16_t>* pageArray, - int nCount) { - if (rangstring.GetLength() != 0) { - rangstring.Remove(' '); - int nLength = rangstring.GetLength(); - CFX_ByteString cbCompareString("0123456789-,"); - for (int i = 0; i < nLength; ++i) { - if (cbCompareString.Find(rangstring[i]) == -1) - return false; - } - CFX_ByteString cbMidRange; - int nStringFrom = 0; - int nStringTo = 0; - while (nStringTo < nLength) { - nStringTo = rangstring.Find(',', nStringFrom); - if (nStringTo == -1) - nStringTo = nLength; - cbMidRange = rangstring.Mid(nStringFrom, nStringTo - nStringFrom); - int nMid = cbMidRange.Find('-'); - if (nMid == -1) { - long lPageNum = atol(cbMidRange.c_str()); - if (lPageNum <= 0 || lPageNum > nCount) - return false; - pageArray->push_back((uint16_t)lPageNum); - } else { - int nStartPageNum = atol(cbMidRange.Mid(0, nMid).c_str()); - if (nStartPageNum == 0) - return false; - - ++nMid; - int nEnd = cbMidRange.GetLength() - nMid; - if (nEnd == 0) - return false; - - int nEndPageNum = atol(cbMidRange.Mid(nMid, nEnd).c_str()); - if (nStartPageNum < 0 || nStartPageNum > nEndPageNum || - nEndPageNum > nCount) { - return false; - } - for (int i = nStartPageNum; i <= nEndPageNum; ++i) { - pageArray->push_back(i); - } - } - nStringFrom = nStringTo + 1; - } - } - return true; -} - DLLEXPORT FPDF_BOOL STDCALL FPDF_ImportPages(FPDF_DOCUMENT dest_doc, FPDF_DOCUMENT src_doc, FPDF_BYTESTRING pagerange, @@ -367,9 +363,8 @@ DLLEXPORT FPDF_BOOL STDCALL FPDF_ImportPages(FPDF_DOCUMENT dest_doc, } } - CPDF_PageOrganizer pageOrg; - pageOrg.PDFDocInit(pDestDoc, pSrcDoc); - return pageOrg.ExportPage(pSrcDoc, &pageArray, pDestDoc, index); + CPDF_PageOrganizer pageOrg(pDestDoc, pSrcDoc); + return pageOrg.PDFDocInit() && pageOrg.ExportPage(pageArray, index); } DLLEXPORT FPDF_BOOL STDCALL FPDF_CopyViewerPreferences(FPDF_DOCUMENT dest_doc, |