diff options
| -rw-r--r-- | fpdfsdk/fpdf_ppo.cpp | 104 |
1 files changed, 54 insertions, 50 deletions
diff --git a/fpdfsdk/fpdf_ppo.cpp b/fpdfsdk/fpdf_ppo.cpp index b0d97e0360..1c9550a54a 100644 --- a/fpdfsdk/fpdf_ppo.cpp +++ b/fpdfsdk/fpdf_ppo.cpp @@ -134,20 +134,20 @@ NupPageSettings NupState::CalculateNewPagePosition(const CFX_SizeF& pagesize) { return CalculatePageEdit(subX, subY, pagesize); } -CPDF_Object* PageDictGetInheritableTag(CPDF_Dictionary* pDict, - const ByteString& bsSrcTag) { +const CPDF_Object* PageDictGetInheritableTag(const CPDF_Dictionary* pDict, + const ByteString& bsSrcTag) { if (!pDict || bsSrcTag.IsEmpty()) return nullptr; if (!pDict->KeyExist("Parent") || !pDict->KeyExist("Type")) return nullptr; - CPDF_Object* pType = pDict->GetObjectFor("Type")->GetDirect(); + const CPDF_Object* pType = pDict->GetObjectFor("Type")->GetDirect(); if (!ToName(pType)) return nullptr; if (pType->GetString().Compare("Page")) return nullptr; - CPDF_Dictionary* pp = + const CPDF_Dictionary* pp = ToDictionary(pDict->GetObjectFor("Parent")->GetDirect()); if (!pp) return nullptr; @@ -165,41 +165,44 @@ CPDF_Object* PageDictGetInheritableTag(CPDF_Dictionary* pDict, return nullptr; } -CFX_FloatRect GetMediaBox(CPDF_Dictionary* pPageDict) { - CPDF_Object* pMediaBox = PageDictGetInheritableTag(pPageDict, "MediaBox"); +CFX_FloatRect GetMediaBox(const CPDF_Dictionary* pPageDict) { + const CPDF_Object* pMediaBox = + PageDictGetInheritableTag(pPageDict, "MediaBox"); CPDF_Array* pArray = ToArray(pMediaBox->GetDirect()); if (!pArray) return CFX_FloatRect(); return pArray->GetRect(); } -CFX_FloatRect GetCropBox(CPDF_Dictionary* pPageDict) { +CFX_FloatRect GetCropBox(const CPDF_Dictionary* pPageDict) { if (pPageDict->KeyExist("CropBox")) return pPageDict->GetRectFor("CropBox"); return GetMediaBox(pPageDict); } -CFX_FloatRect GetTrimBox(CPDF_Dictionary* pPageDict) { +CFX_FloatRect GetTrimBox(const CPDF_Dictionary* pPageDict) { if (pPageDict->KeyExist("TrimBox")) return pPageDict->GetRectFor("TrimBox"); return GetCropBox(pPageDict); } -CPDF_Object* GetPageOrganizerPageContent(CPDF_Dictionary* pPageDict) { +const CPDF_Object* GetPageOrganizerPageContent( + const CPDF_Dictionary* pPageDict) { return pPageDict ? pPageDict->GetDirectObjectFor("Contents") : nullptr; } -bool CopyInheritable(CPDF_Dictionary* pCurPageDict, - CPDF_Dictionary* pSrcPageDict, +bool CopyInheritable(CPDF_Dictionary* pDestPageDict, + const CPDF_Dictionary* pSrcPageDict, const ByteString& key) { - if (pCurPageDict->KeyExist(key)) + if (pDestPageDict->KeyExist(key)) return true; - CPDF_Object* pInheritable = PageDictGetInheritableTag(pSrcPageDict, key); + const CPDF_Object* pInheritable = + PageDictGetInheritableTag(pSrcPageDict, key); if (!pInheritable) return false; - pCurPageDict->SetFor(key, pInheritable->Clone()); + pDestPageDict->SetFor(key, pInheritable->Clone()); return true; } @@ -462,9 +465,9 @@ bool CPDF_PageExporter::ExportPage(const std::vector<uint32_t>& pageNums, int curpage = nIndex; auto pObjNumberMap = pdfium::MakeUnique<ObjectNumberMap>(); for (size_t i = 0; i < pageNums.size(); ++i) { - CPDF_Dictionary* pCurPageDict = dest()->CreateNewPage(curpage); - CPDF_Dictionary* pSrcPageDict = src()->GetPage(pageNums[i] - 1); - if (!pSrcPageDict || !pCurPageDict) + CPDF_Dictionary* pDestPageDict = dest()->CreateNewPage(curpage); + const CPDF_Dictionary* pSrcPageDict = src()->GetPage(pageNums[i] - 1); + if (!pSrcPageDict || !pDestPageDict) return false; // Clone the page dictionary @@ -474,43 +477,43 @@ bool CPDF_PageExporter::ExportPage(const std::vector<uint32_t>& pageNums, continue; CPDF_Object* pObj = it.second.get(); - pCurPageDict->SetFor(cbSrcKeyStr, pObj->Clone()); + pDestPageDict->SetFor(cbSrcKeyStr, pObj->Clone()); } // inheritable item // Even though some entries are required by the PDF spec, there exist // PDFs that omit them. Set some defaults in this case. // 1 MediaBox - required - if (!CopyInheritable(pCurPageDict, pSrcPageDict, "MediaBox")) { + if (!CopyInheritable(pDestPageDict, pSrcPageDict, "MediaBox")) { // Search for "CropBox" in the source page dictionary. // If it does not exist, use the default letter size. - CPDF_Object* pInheritable = + const CPDF_Object* pInheritable = PageDictGetInheritableTag(pSrcPageDict, "CropBox"); if (pInheritable) { - pCurPageDict->SetFor("MediaBox", pInheritable->Clone()); + pDestPageDict->SetFor("MediaBox", pInheritable->Clone()); } else { // Make the default size letter size (8.5"x11") static const CFX_FloatRect kDefaultLetterRect(0, 0, 612, 792); - pCurPageDict->SetRectFor("MediaBox", kDefaultLetterRect); + pDestPageDict->SetRectFor("MediaBox", kDefaultLetterRect); } } // 2 Resources - required - if (!CopyInheritable(pCurPageDict, pSrcPageDict, "Resources")) { + if (!CopyInheritable(pDestPageDict, pSrcPageDict, "Resources")) { // Use a default empty resources if it does not exist. - pCurPageDict->SetNewFor<CPDF_Dictionary>("Resources"); + pDestPageDict->SetNewFor<CPDF_Dictionary>("Resources"); } // 3 CropBox - optional - CopyInheritable(pCurPageDict, pSrcPageDict, "CropBox"); + CopyInheritable(pDestPageDict, pSrcPageDict, "CropBox"); // 4 Rotate - optional - CopyInheritable(pCurPageDict, pSrcPageDict, "Rotate"); + CopyInheritable(pDestPageDict, pSrcPageDict, "Rotate"); // Update the reference uint32_t dwOldPageObj = pSrcPageDict->GetObjNum(); - uint32_t dwNewPageObj = pCurPageDict->GetObjNum(); + uint32_t dwNewPageObj = pDestPageDict->GetObjNum(); (*pObjNumberMap)[dwOldPageObj] = dwNewPageObj; - UpdateReference(pCurPageDict, pObjNumberMap.get()); + UpdateReference(pDestPageDict, pObjNumberMap.get()); ++curpage; } @@ -547,16 +550,16 @@ class CPDF_NPageToOneExporter : public CPDF_PageOrganizer { // Creates a xobject from the source page dictionary, and appends the // bsContent string with the xobject reference surrounded by the // transformation matrix. - void AddSubPage(CPDF_Dictionary* pPageDict, + void AddSubPage(const CPDF_Dictionary* pSrcPageDict, const NupPageSettings& settings, ObjectNumberMap* pObjNumberMap, PageXObjectMap* pPageXObjectMap, XObjectNameNumberMap* pXObjNameNumberMap, ByteString* bsContent); - uint32_t MakeXObject(CPDF_Dictionary* pSrcPageDict, + uint32_t MakeXObject(const CPDF_Dictionary* pSrcPageDict, ObjectNumberMap* pObjNumberMap); - void FinishPage(CPDF_Dictionary* pCurPageDict, + void FinishPage(CPDF_Dictionary* pDestPageDict, const ByteString& bsContent, const XObjectNameNumberMap& xObjNameNumberMap); @@ -600,11 +603,11 @@ bool CPDF_NPageToOneExporter::ExportNPagesToOne( for (size_t outerPage = 0; outerPage < pageNums.size(); outerPage += numPagesPerSheet) { // Create a new page - CPDF_Dictionary* pCurPageDict = dest()->CreateNewPage(curpage); - if (!pCurPageDict) + CPDF_Dictionary* pDestPageDict = dest()->CreateNewPage(curpage); + if (!pDestPageDict) return false; - pCurPageDict->SetRectFor("MediaBox", destPageRect); + pDestPageDict->SetRectFor("MediaBox", destPageRect); ByteString bsContent; size_t innerPageMax = std::min(outerPage + numPagesPerSheet, pageNums.size()); @@ -623,7 +626,7 @@ bool CPDF_NPageToOneExporter::ExportNPagesToOne( } // Finish up the current page. - FinishPage(pCurPageDict, bsContent, xObjNameNumberMap); + FinishPage(pDestPageDict, bsContent, xObjNameNumberMap); ++curpage; } @@ -631,13 +634,13 @@ bool CPDF_NPageToOneExporter::ExportNPagesToOne( } void CPDF_NPageToOneExporter::AddSubPage( - CPDF_Dictionary* pPageDict, + const CPDF_Dictionary* pSrcPageDict, const NupPageSettings& settings, ObjectNumberMap* pObjNumberMap, PageXObjectMap* pPageXObjectMap, XObjectNameNumberMap* pXObjNameNumberMap, ByteString* bsContent) { - uint32_t dwPageObjnum = pPageDict->GetObjNum(); + uint32_t dwPageObjnum = pSrcPageDict->GetObjNum(); ByteString bsXObjectName; const auto it = pPageXObjectMap->find(dwPageObjnum); if (it != pPageXObjectMap->end()) { @@ -646,7 +649,7 @@ void CPDF_NPageToOneExporter::AddSubPage( ++m_xobjectNum; // TODO(Xlou): A better name schema to avoid possible object name collision. bsXObjectName = ByteString::Format("X%d", m_xobjectNum); - m_xobjs[bsXObjectName] = MakeXObject(pPageDict, pObjNumberMap); + m_xobjs[bsXObjectName] = MakeXObject(pSrcPageDict, pObjNumberMap); (*pPageXObjectMap)[dwPageObjnum] = bsXObjectName; } (*pXObjNameNumberMap)[bsXObjectName] = m_xobjs[bsXObjectName]; @@ -663,11 +666,12 @@ void CPDF_NPageToOneExporter::AddSubPage( *bsContent += ByteString(contentStream); } -uint32_t CPDF_NPageToOneExporter::MakeXObject(CPDF_Dictionary* pSrcPageDict, - ObjectNumberMap* pObjNumberMap) { +uint32_t CPDF_NPageToOneExporter::MakeXObject( + const CPDF_Dictionary* pSrcPageDict, + ObjectNumberMap* pObjNumberMap) { ASSERT(pSrcPageDict); - CPDF_Object* pSrcContentObj = GetPageOrganizerPageContent(pSrcPageDict); + const CPDF_Object* pSrcContentObj = GetPageOrganizerPageContent(pSrcPageDict); CPDF_Stream* pNewXObject = dest()->NewIndirect<CPDF_Stream>( nullptr, 0, pdfium::MakeUnique<CPDF_Dictionary>(dest()->GetByteStringPool())); @@ -688,7 +692,7 @@ uint32_t CPDF_NPageToOneExporter::MakeXObject(CPDF_Dictionary* pSrcPageDict, pNewXObjectDict->SetRectFor("BBox", GetTrimBox(pSrcPageDict)); // TODO(xlou): add matrix field to pNewXObjectDict. - if (CPDF_Array* pSrcContentArray = ToArray(pSrcContentObj)) { + if (const CPDF_Array* pSrcContentArray = ToArray(pSrcContentObj)) { ByteString bsSrcContentStream; for (size_t i = 0; i < pSrcContentArray->GetCount(); ++i) { CPDF_Stream* pStream = pSrcContentArray->GetStreamAt(i); @@ -701,7 +705,7 @@ uint32_t CPDF_NPageToOneExporter::MakeXObject(CPDF_Dictionary* pSrcPageDict, pNewXObject->SetDataAndRemoveFilter(bsSrcContentStream.raw_str(), bsSrcContentStream.GetLength()); } else { - CPDF_Stream* pStream = pSrcContentObj->AsStream(); + const CPDF_Stream* pStream = pSrcContentObj->AsStream(); auto pAcc = pdfium::MakeRetain<CPDF_StreamAcc>(pStream); pAcc->LoadAllDataFiltered(); ByteString bsStream(pAcc->GetData(), pAcc->GetSize()); @@ -713,14 +717,14 @@ uint32_t CPDF_NPageToOneExporter::MakeXObject(CPDF_Dictionary* pSrcPageDict, } void CPDF_NPageToOneExporter::FinishPage( - CPDF_Dictionary* pCurPageDict, + CPDF_Dictionary* pDestPageDict, const ByteString& bsContent, const XObjectNameNumberMap& xObjNameNumberMap) { - ASSERT(pCurPageDict); + ASSERT(pDestPageDict); - CPDF_Dictionary* pRes = pCurPageDict->GetDictFor("Resources"); + CPDF_Dictionary* pRes = pDestPageDict->GetDictFor("Resources"); if (!pRes) - pRes = pCurPageDict->SetNewFor<CPDF_Dictionary>("Resources"); + pRes = pDestPageDict->SetNewFor<CPDF_Dictionary>("Resources"); CPDF_Dictionary* pPageXObject = pRes->GetDictFor("XObject"); if (!pPageXObject) @@ -733,8 +737,8 @@ void CPDF_NPageToOneExporter::FinishPage( CPDF_Stream* pStream = dest()->NewIndirect<CPDF_Stream>(nullptr, 0, std::move(pDict)); pStream->SetData(bsContent.raw_str(), bsContent.GetLength()); - pCurPageDict->SetNewFor<CPDF_Reference>("Contents", dest(), - pStream->GetObjNum()); + pDestPageDict->SetNewFor<CPDF_Reference>("Contents", dest(), + pStream->GetObjNum()); } } // namespace @@ -812,7 +816,7 @@ FPDF_CopyViewerPreferences(FPDF_DOCUMENT dest_doc, FPDF_DOCUMENT src_doc) { if (!pSrcDoc) return false; - CPDF_Dictionary* pSrcDict = pSrcDoc->GetRoot(); + const CPDF_Dictionary* pSrcDict = pSrcDoc->GetRoot(); pSrcDict = pSrcDict->GetDictFor("ViewerPreferences"); if (!pSrcDict) return false; |