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authorLei Zhang <thestig@chromium.org>2018-02-08 23:31:00 +0000
committerChromium commit bot <commit-bot@chromium.org>2018-02-08 23:31:00 +0000
commit026717cb667cf0c7215cf55daf794d69752fc900 (patch)
tree89c79db2bb57bafaeca12b92497475f26dbb960a /fpdfsdk
parent952600929af59949be1b30fffdfce18b5bd09a41 (diff)
downloadpdfium-026717cb667cf0c7215cf55daf794d69752fc900.tar.xz
Split CPDF_PageOrganizer into multiple classes.chromium/3345
Retain CPDF_PageOrganizer as a base class. Add CPDF_PageExporter and CPDF_NPageToOneExporter sub-classes. The sub-classes only do one type of exporting. Therefore it is much easier to understand what part of the original combined CPDF_PageOrganizer is used where. Change-Id: I424ef9c32b101d23e8397fc9a656d9b0b5da6a27 Reviewed-on: https://pdfium-review.googlesource.com/26011 Commit-Queue: Lei Zhang <thestig@chromium.org> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Shirleen Lou <xlou@chromium.org>
Diffstat (limited to 'fpdfsdk')
-rw-r--r--fpdfsdk/fpdf_ppo.cpp529
1 files changed, 292 insertions, 237 deletions
diff --git a/fpdfsdk/fpdf_ppo.cpp b/fpdfsdk/fpdf_ppo.cpp
index f51bb22f98..efec4b222b 100644
--- a/fpdfsdk/fpdf_ppo.cpp
+++ b/fpdfsdk/fpdf_ppo.cpp
@@ -283,50 +283,18 @@ std::vector<uint32_t> GetPageNumbers(const CPDF_Document& doc,
return page_numbers;
}
-} // namespace
-
class CPDF_PageOrganizer {
- public:
+ protected:
+ // Map source page object number to XObject object number.
+ using ObjectNumberMap = std::map<uint32_t, uint32_t>;
+
CPDF_PageOrganizer(CPDF_Document* pDestPDFDoc, CPDF_Document* pSrcPDFDoc);
~CPDF_PageOrganizer();
+ // Must be called after construction before doing anything else.
bool PDFDocInit();
- bool ExportPage(const std::vector<uint32_t>& pageNums, int nIndex);
- bool ExportNPagesToOne(const std::vector<uint32_t>& pageNums,
- float destPageWidth,
- float destPageHeight,
- unsigned int numPagesOnXAxis,
- unsigned int numPagesOnYAxis);
-
- private:
- // Map source page object number to XObject object number.
- using ObjectNumberMap = std::map<uint32_t, uint32_t>;
- // Map page object number to XObject object name.
- using PageXObjectMap = std::map<uint32_t, ByteString>;
- // Map XObject's object name to it's object number.
- using XObjectNameNumberMap = std::map<ByteString, uint32_t>;
-
- static void SetMediaBox(CPDF_Dictionary* pDestPageDict,
- const CFX_SizeF& pagesize);
bool UpdateReference(CPDF_Object* pObj, ObjectNumberMap* pObjNumberMap);
- uint32_t GetNewObjId(ObjectNumberMap* pObjNumberMap, CPDF_Reference* pRef);
- // 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,
- const CFX_PointF& position,
- float scale,
- ObjectNumberMap* pObjNumberMap,
- PageXObjectMap* pPageXObjectMap,
- XObjectNameNumberMap* pXObjNameNumberMap,
- ByteString* bsContent);
- uint32_t MakeXObject(CPDF_Dictionary* pSrcPageDict,
- ObjectNumberMap* pObjNumberMap,
- CPDF_Document* pDestDoc);
- void FinishPage(CPDF_Dictionary* pCurPageDict,
- const ByteString& bsContent,
- XObjectNameNumberMap* pXObjNameNumberMap);
CPDF_Document* dest() { return m_pDestPDFDoc.Get(); }
const CPDF_Document* dest() const { return m_pDestPDFDoc.Get(); }
@@ -334,13 +302,11 @@ class CPDF_PageOrganizer {
CPDF_Document* src() { return m_pSrcPDFDoc.Get(); }
const CPDF_Document* src() const { return m_pSrcPDFDoc.Get(); }
+ private:
+ uint32_t GetNewObjId(ObjectNumberMap* pObjNumberMap, CPDF_Reference* pRef);
+
UnownedPtr<CPDF_Document> const m_pDestPDFDoc;
UnownedPtr<CPDF_Document> const m_pSrcPDFDoc;
- uint32_t m_xobjectNum = 0;
- CFX_SizeF m_pageSize;
- // Mapping of XObject name and XObject object number of the entire document.
- // Key is XObject name.
- XObjectNameNumberMap m_xobjs;
};
CPDF_PageOrganizer::CPDF_PageOrganizer(CPDF_Document* pDestPDFDoc,
@@ -389,101 +355,121 @@ bool CPDF_PageOrganizer::PDFDocInit() {
return true;
}
-void CPDF_PageOrganizer::AddSubPage(CPDF_Dictionary* pPageDict,
- const CFX_PointF& position,
- float scale,
- ObjectNumberMap* pObjNumberMap,
- PageXObjectMap* pPageXObjectMap,
- XObjectNameNumberMap* pXObjNameNumberMap,
- ByteString* bsContent) {
- uint32_t dwPageObjnum = pPageDict->GetObjNum();
- ByteString bsXObjectName;
- const auto it = pPageXObjectMap->find(dwPageObjnum);
- if (it != pPageXObjectMap->end()) {
- bsXObjectName = it->second;
- } else {
- ++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, dest());
- (*pPageXObjectMap)[dwPageObjnum] = bsXObjectName;
+bool CPDF_PageOrganizer::UpdateReference(CPDF_Object* pObj,
+ ObjectNumberMap* pObjNumberMap) {
+ switch (pObj->GetType()) {
+ case CPDF_Object::REFERENCE: {
+ CPDF_Reference* pReference = pObj->AsReference();
+ uint32_t newobjnum = GetNewObjId(pObjNumberMap, pReference);
+ if (newobjnum == 0)
+ return false;
+ pReference->SetRef(dest(), newobjnum);
+ break;
+ }
+ case CPDF_Object::DICTIONARY: {
+ CPDF_Dictionary* pDict = pObj->AsDictionary();
+ auto it = pDict->begin();
+ while (it != pDict->end()) {
+ const ByteString& key = it->first;
+ CPDF_Object* pNextObj = it->second.get();
+ ++it;
+ if (key == "Parent" || key == "Prev" || key == "First")
+ continue;
+ if (!pNextObj)
+ return false;
+ if (!UpdateReference(pNextObj, pObjNumberMap))
+ pDict->RemoveFor(key);
+ }
+ break;
+ }
+ case CPDF_Object::ARRAY: {
+ CPDF_Array* pArray = pObj->AsArray();
+ for (size_t i = 0; i < pArray->GetCount(); ++i) {
+ CPDF_Object* pNextObj = pArray->GetObjectAt(i);
+ if (!pNextObj)
+ return false;
+ if (!UpdateReference(pNextObj, pObjNumberMap))
+ return false;
+ }
+ break;
+ }
+ case CPDF_Object::STREAM: {
+ CPDF_Stream* pStream = pObj->AsStream();
+ CPDF_Dictionary* pDict = pStream->GetDict();
+ if (!pDict)
+ return false;
+ if (!UpdateReference(pDict, pObjNumberMap))
+ return false;
+ break;
+ }
+ default:
+ break;
}
- (*pXObjNameNumberMap)[bsXObjectName] = m_xobjs[bsXObjectName];
- CFX_Matrix matrix;
- matrix.Scale(scale, scale);
- matrix.Translate(position.x, position.y);
-
- std::ostringstream contentStream;
- contentStream << "q\n"
- << matrix.a << " " << matrix.b << " " << matrix.c << " "
- << matrix.d << " " << matrix.e << " " << matrix.f << " cm\n"
- << "/" << bsXObjectName << " Do Q\n";
- *bsContent += ByteString(contentStream);
+ return true;
}
-uint32_t CPDF_PageOrganizer::MakeXObject(CPDF_Dictionary* pSrcPageDict,
- ObjectNumberMap* pObjNumberMap,
- CPDF_Document* pDestDoc) {
- ASSERT(pSrcPageDict);
+uint32_t CPDF_PageOrganizer::GetNewObjId(ObjectNumberMap* pObjNumberMap,
+ CPDF_Reference* pRef) {
+ if (!pRef)
+ return 0;
- CPDF_Object* pSrcContentObj = GetPageOrganizerPageContent(pSrcPageDict);
- CPDF_Stream* pNewXObject = pDestDoc->NewIndirect<CPDF_Stream>(
- nullptr, 0,
- pdfium::MakeUnique<CPDF_Dictionary>(pDestDoc->GetByteStringPool()));
- CPDF_Dictionary* pNewXObjectDict = pNewXObject->GetDict();
- const ByteString bsResourceString = "Resources";
- if (!CopyInheritable(pNewXObjectDict, pSrcPageDict, bsResourceString)) {
- // Use a default empty resources if it does not exist.
- pNewXObjectDict->SetNewFor<CPDF_Dictionary>(bsResourceString);
- }
- uint32_t dwSrcPageObj = pSrcPageDict->GetObjNum();
- uint32_t dwNewXobjectObj = pNewXObjectDict->GetObjNum();
- (*pObjNumberMap)[dwSrcPageObj] = dwNewXobjectObj;
- UpdateReference(pNewXObjectDict, pObjNumberMap);
+ uint32_t dwObjnum = pRef->GetRefObjNum();
+ uint32_t dwNewObjNum = 0;
+ const auto it = pObjNumberMap->find(dwObjnum);
+ if (it != pObjNumberMap->end())
+ dwNewObjNum = it->second;
+ if (dwNewObjNum)
+ return dwNewObjNum;
- pNewXObjectDict->SetNewFor<CPDF_Name>("Type", "XObject");
- pNewXObjectDict->SetNewFor<CPDF_Name>("Subtype", "Form");
- pNewXObjectDict->SetNewFor<CPDF_Number>("FormType", 1);
- pNewXObjectDict->SetRectFor("BBox", GetTrimBox(pSrcPageDict));
- // TODO(xlou): add matrix field to pNewXObjectDict.
+ CPDF_Object* pDirect = pRef->GetDirect();
+ if (!pDirect)
+ return 0;
- if (CPDF_Array* pSrcContentArray = ToArray(pSrcContentObj)) {
- ByteString bsSrcContentStream;
- for (size_t i = 0; i < pSrcContentArray->GetCount(); ++i) {
- CPDF_Stream* pStream = pSrcContentArray->GetStreamAt(i);
- auto pAcc = pdfium::MakeRetain<CPDF_StreamAcc>(pStream);
- pAcc->LoadAllDataFiltered();
- ByteString bsStream(pAcc->GetData(), pAcc->GetSize());
- bsSrcContentStream += bsStream;
- bsSrcContentStream += "\n";
+ std::unique_ptr<CPDF_Object> pClone = pDirect->Clone();
+ if (CPDF_Dictionary* pDictClone = pClone->AsDictionary()) {
+ if (pDictClone->KeyExist("Type")) {
+ ByteString strType = pDictClone->GetStringFor("Type");
+ if (!FXSYS_stricmp(strType.c_str(), "Pages"))
+ return 4;
+ if (!FXSYS_stricmp(strType.c_str(), "Page"))
+ return 0;
}
- pNewXObject->SetDataAndRemoveFilter(bsSrcContentStream.raw_str(),
- bsSrcContentStream.GetLength());
- } else {
- CPDF_Stream* pStream = pSrcContentObj->AsStream();
- auto pAcc = pdfium::MakeRetain<CPDF_StreamAcc>(pStream);
- pAcc->LoadAllDataFiltered();
- ByteString bsStream(pAcc->GetData(), pAcc->GetSize());
- pNewXObject->SetDataAndRemoveFilter(bsStream.raw_str(),
- bsStream.GetLength());
}
+ CPDF_Object* pUnownedClone = dest()->AddIndirectObject(std::move(pClone));
+ dwNewObjNum = pUnownedClone->GetObjNum();
+ (*pObjNumberMap)[dwObjnum] = dwNewObjNum;
+ if (!UpdateReference(pUnownedClone, pObjNumberMap))
+ return 0;
- return pNewXObject->GetObjNum();
+ return dwNewObjNum;
}
-// static
-void CPDF_PageOrganizer::SetMediaBox(CPDF_Dictionary* pDestPageDict,
- const CFX_SizeF& pagesize) {
- CPDF_Array* pArray = pDestPageDict->SetNewFor<CPDF_Array>("MediaBox");
- pArray->AddNew<CPDF_Number>(0);
- pArray->AddNew<CPDF_Number>(0);
- pArray->AddNew<CPDF_Number>(pagesize.width);
- pArray->AddNew<CPDF_Number>(pagesize.height);
-}
+// Copies pages from a source document into a destination document.
+// This class is intended to be used once via ExportPage() and then destroyed.
+class CPDF_PageExporter : public CPDF_PageOrganizer {
+ public:
+ CPDF_PageExporter(CPDF_Document* pDestPDFDoc, CPDF_Document* pSrcPDFDoc);
+ ~CPDF_PageExporter();
+
+ // For the pages from the source document with |pageNums| as their page
+ // numbers, insert them into the destination document at page |nIndex|.
+ // |pageNums| is 1-based.
+ // |nIndex| is 0-based.
+ bool ExportPage(const std::vector<uint32_t>& pageNums, int nIndex);
+};
+
+CPDF_PageExporter::CPDF_PageExporter(CPDF_Document* pDestPDFDoc,
+ CPDF_Document* pSrcPDFDoc)
+ : CPDF_PageOrganizer(pDestPDFDoc, pSrcPDFDoc) {}
+
+CPDF_PageExporter::~CPDF_PageExporter() = default;
+
+bool CPDF_PageExporter::ExportPage(const std::vector<uint32_t>& pageNums,
+ int nIndex) {
+ if (!PDFDocInit())
+ return false;
-bool CPDF_PageOrganizer::ExportPage(const std::vector<uint32_t>& pageNums,
- int nIndex) {
int curpage = nIndex;
auto pObjNumberMap = pdfium::MakeUnique<ObjectNumberMap>();
for (size_t i = 0; i < pageNums.size(); ++i) {
@@ -545,46 +531,82 @@ bool CPDF_PageOrganizer::ExportPage(const std::vector<uint32_t>& pageNums,
return true;
}
-void CPDF_PageOrganizer::FinishPage(CPDF_Dictionary* pCurPageDict,
- const ByteString& bsContent,
- XObjectNameNumberMap* pXObjNameNumberMap) {
- ASSERT(pCurPageDict);
+// Copies pages from a source document into a destination document. Creates 1
+// page in the destination document for every N source pages. This class is
+// intended to be used once via ExportNPagesToOne() and then destroyed.
+class CPDF_NPageToOneExporter : public CPDF_PageOrganizer {
+ public:
+ CPDF_NPageToOneExporter(CPDF_Document* pDestPDFDoc,
+ CPDF_Document* pSrcPDFDoc);
+ ~CPDF_NPageToOneExporter();
+
+ // For the pages from the source document with |pageNums| as their page
+ // numbers, insert them into the destination document, starting at page 0.
+ // |pageNums| is 1-based.
+ // |destPageWidth| and |destPageHeight| are the destination document page
+ // dimensions, measured in pixels.
+ // |numPagesOnXAxis| and |numPagesOnXAxis| together defines how many source
+ // pages fit on one destination page.
+ bool ExportNPagesToOne(const std::vector<uint32_t>& pageNums,
+ float destPageWidth,
+ float destPageHeight,
+ unsigned int numPagesOnXAxis,
+ unsigned int numPagesOnYAxis);
- CPDF_Dictionary* pRes = pCurPageDict->GetDictFor("Resources");
- if (!pRes)
- pRes = pCurPageDict->SetNewFor<CPDF_Dictionary>("Resources");
+ private:
+ // Map page object number to XObject object name.
+ using PageXObjectMap = std::map<uint32_t, ByteString>;
+ // Map XObject's object name to it's object number.
+ using XObjectNameNumberMap = std::map<ByteString, uint32_t>;
- CPDF_Dictionary* pPageXObject = pRes->GetDictFor("XObject");
- if (!pPageXObject)
- pPageXObject = pRes->SetNewFor<CPDF_Dictionary>("XObject");
+ static void SetMediaBox(CPDF_Dictionary* pDestPageDict,
+ const CFX_SizeF& pagesize);
- for (auto& it : *pXObjNameNumberMap) {
- pPageXObject->SetNewFor<CPDF_Reference>(it.first, dest(), it.second);
- }
+ // 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,
+ const CFX_PointF& position,
+ float scale,
+ ObjectNumberMap* pObjNumberMap,
+ PageXObjectMap* pPageXObjectMap,
+ XObjectNameNumberMap* pXObjNameNumberMap,
+ ByteString* bsContent);
+ uint32_t MakeXObject(CPDF_Dictionary* pSrcPageDict,
+ ObjectNumberMap* pObjNumberMap,
+ CPDF_Document* pDestDoc);
- auto pDict = pdfium::MakeUnique<CPDF_Dictionary>(dest()->GetByteStringPool());
- 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());
-}
+ void FinishPage(CPDF_Dictionary* pCurPageDict,
+ const ByteString& bsContent,
+ XObjectNameNumberMap* pXObjNameNumberMap);
+
+ uint32_t m_xobjectNum = 0;
+ CFX_SizeF m_pageSize;
+ XObjectNameNumberMap m_xobjs;
+};
+
+CPDF_NPageToOneExporter::CPDF_NPageToOneExporter(CPDF_Document* pDestPDFDoc,
+ CPDF_Document* pSrcPDFDoc)
+ : CPDF_PageOrganizer(pDestPDFDoc, pSrcPDFDoc) {}
-bool CPDF_PageOrganizer::ExportNPagesToOne(
+CPDF_NPageToOneExporter::~CPDF_NPageToOneExporter() = default;
+
+bool CPDF_NPageToOneExporter::ExportNPagesToOne(
const std::vector<uint32_t>& pageNums,
float destPageWidth,
float destPageHeight,
unsigned int numPagesOnXAxis,
unsigned int numPagesOnYAxis) {
+ if (!PDFDocInit())
+ return false;
+
FX_SAFE_SIZE_T safe_numPagesPerSheet = numPagesOnXAxis;
safe_numPagesPerSheet *= numPagesOnYAxis;
-
if (!safe_numPagesPerSheet.IsValid())
return false;
size_t numPagesPerSheet = safe_numPagesPerSheet.ValueOrDie();
- if (numPagesPerSheet == 1)
- return ExportPage(pageNums, 0);
+
// Mapping of source page object number and XObject object number.
// Used to update refernece.
ObjectNumberMap objectNumberMap;
@@ -632,96 +654,128 @@ bool CPDF_PageOrganizer::ExportNPagesToOne(
return true;
}
-bool CPDF_PageOrganizer::UpdateReference(CPDF_Object* pObj,
- ObjectNumberMap* pObjNumberMap) {
- switch (pObj->GetType()) {
- case CPDF_Object::REFERENCE: {
- CPDF_Reference* pReference = pObj->AsReference();
- uint32_t newobjnum = GetNewObjId(pObjNumberMap, pReference);
- if (newobjnum == 0)
- return false;
- pReference->SetRef(dest(), newobjnum);
- break;
- }
- case CPDF_Object::DICTIONARY: {
- CPDF_Dictionary* pDict = pObj->AsDictionary();
- auto it = pDict->begin();
- while (it != pDict->end()) {
- const ByteString& key = it->first;
- CPDF_Object* pNextObj = it->second.get();
- ++it;
- if (key == "Parent" || key == "Prev" || key == "First")
- continue;
- if (!pNextObj)
- return false;
- if (!UpdateReference(pNextObj, pObjNumberMap))
- pDict->RemoveFor(key);
- }
- break;
- }
- case CPDF_Object::ARRAY: {
- CPDF_Array* pArray = pObj->AsArray();
- for (size_t i = 0; i < pArray->GetCount(); ++i) {
- CPDF_Object* pNextObj = pArray->GetObjectAt(i);
- if (!pNextObj)
- return false;
- if (!UpdateReference(pNextObj, pObjNumberMap))
- return false;
- }
- break;
- }
- case CPDF_Object::STREAM: {
- CPDF_Stream* pStream = pObj->AsStream();
- CPDF_Dictionary* pDict = pStream->GetDict();
- if (!pDict)
- return false;
- if (!UpdateReference(pDict, pObjNumberMap))
- return false;
- break;
- }
- default:
- break;
+// static
+void CPDF_NPageToOneExporter::SetMediaBox(CPDF_Dictionary* pDestPageDict,
+ const CFX_SizeF& pagesize) {
+ CPDF_Array* pArray = pDestPageDict->SetNewFor<CPDF_Array>("MediaBox");
+ pArray->AddNew<CPDF_Number>(0);
+ pArray->AddNew<CPDF_Number>(0);
+ pArray->AddNew<CPDF_Number>(pagesize.width);
+ pArray->AddNew<CPDF_Number>(pagesize.height);
+}
+
+void CPDF_NPageToOneExporter::AddSubPage(
+ CPDF_Dictionary* pPageDict,
+ const CFX_PointF& position,
+ float scale,
+ ObjectNumberMap* pObjNumberMap,
+ PageXObjectMap* pPageXObjectMap,
+ XObjectNameNumberMap* pXObjNameNumberMap,
+ ByteString* bsContent) {
+ uint32_t dwPageObjnum = pPageDict->GetObjNum();
+ ByteString bsXObjectName;
+ const auto it = pPageXObjectMap->find(dwPageObjnum);
+ if (it != pPageXObjectMap->end()) {
+ bsXObjectName = it->second;
+ } else {
+ ++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, dest());
+ (*pPageXObjectMap)[dwPageObjnum] = bsXObjectName;
}
+ (*pXObjNameNumberMap)[bsXObjectName] = m_xobjs[bsXObjectName];
- return true;
+ CFX_Matrix matrix;
+ matrix.Scale(scale, scale);
+ matrix.Translate(position.x, position.y);
+
+ std::ostringstream contentStream;
+ contentStream << "q\n"
+ << matrix.a << " " << matrix.b << " " << matrix.c << " "
+ << matrix.d << " " << matrix.e << " " << matrix.f << " cm\n"
+ << "/" << bsXObjectName << " Do Q\n";
+ *bsContent += ByteString(contentStream);
}
-uint32_t CPDF_PageOrganizer::GetNewObjId(ObjectNumberMap* pObjNumberMap,
- CPDF_Reference* pRef) {
- if (!pRef)
- return 0;
+uint32_t CPDF_NPageToOneExporter::MakeXObject(CPDF_Dictionary* pSrcPageDict,
+ ObjectNumberMap* pObjNumberMap,
+ CPDF_Document* pDestDoc) {
+ ASSERT(pSrcPageDict);
- uint32_t dwObjnum = pRef->GetRefObjNum();
- uint32_t dwNewObjNum = 0;
- const auto it = pObjNumberMap->find(dwObjnum);
- if (it != pObjNumberMap->end())
- dwNewObjNum = it->second;
- if (dwNewObjNum)
- return dwNewObjNum;
+ CPDF_Object* pSrcContentObj = GetPageOrganizerPageContent(pSrcPageDict);
+ CPDF_Stream* pNewXObject = pDestDoc->NewIndirect<CPDF_Stream>(
+ nullptr, 0,
+ pdfium::MakeUnique<CPDF_Dictionary>(pDestDoc->GetByteStringPool()));
+ CPDF_Dictionary* pNewXObjectDict = pNewXObject->GetDict();
+ const ByteString bsResourceString = "Resources";
+ if (!CopyInheritable(pNewXObjectDict, pSrcPageDict, bsResourceString)) {
+ // Use a default empty resources if it does not exist.
+ pNewXObjectDict->SetNewFor<CPDF_Dictionary>(bsResourceString);
+ }
+ uint32_t dwSrcPageObj = pSrcPageDict->GetObjNum();
+ uint32_t dwNewXobjectObj = pNewXObjectDict->GetObjNum();
+ (*pObjNumberMap)[dwSrcPageObj] = dwNewXobjectObj;
+ UpdateReference(pNewXObjectDict, pObjNumberMap);
- CPDF_Object* pDirect = pRef->GetDirect();
- if (!pDirect)
- return 0;
+ pNewXObjectDict->SetNewFor<CPDF_Name>("Type", "XObject");
+ pNewXObjectDict->SetNewFor<CPDF_Name>("Subtype", "Form");
+ pNewXObjectDict->SetNewFor<CPDF_Number>("FormType", 1);
+ pNewXObjectDict->SetRectFor("BBox", GetTrimBox(pSrcPageDict));
+ // TODO(xlou): add matrix field to pNewXObjectDict.
- std::unique_ptr<CPDF_Object> pClone = pDirect->Clone();
- if (CPDF_Dictionary* pDictClone = pClone->AsDictionary()) {
- if (pDictClone->KeyExist("Type")) {
- ByteString strType = pDictClone->GetStringFor("Type");
- if (!FXSYS_stricmp(strType.c_str(), "Pages"))
- return 4;
- if (!FXSYS_stricmp(strType.c_str(), "Page"))
- return 0;
+ if (CPDF_Array* pSrcContentArray = ToArray(pSrcContentObj)) {
+ ByteString bsSrcContentStream;
+ for (size_t i = 0; i < pSrcContentArray->GetCount(); ++i) {
+ CPDF_Stream* pStream = pSrcContentArray->GetStreamAt(i);
+ auto pAcc = pdfium::MakeRetain<CPDF_StreamAcc>(pStream);
+ pAcc->LoadAllDataFiltered();
+ ByteString bsStream(pAcc->GetData(), pAcc->GetSize());
+ bsSrcContentStream += bsStream;
+ bsSrcContentStream += "\n";
}
+ pNewXObject->SetDataAndRemoveFilter(bsSrcContentStream.raw_str(),
+ bsSrcContentStream.GetLength());
+ } else {
+ CPDF_Stream* pStream = pSrcContentObj->AsStream();
+ auto pAcc = pdfium::MakeRetain<CPDF_StreamAcc>(pStream);
+ pAcc->LoadAllDataFiltered();
+ ByteString bsStream(pAcc->GetData(), pAcc->GetSize());
+ pNewXObject->SetDataAndRemoveFilter(bsStream.raw_str(),
+ bsStream.GetLength());
}
- CPDF_Object* pUnownedClone = dest()->AddIndirectObject(std::move(pClone));
- dwNewObjNum = pUnownedClone->GetObjNum();
- (*pObjNumberMap)[dwObjnum] = dwNewObjNum;
- if (!UpdateReference(pUnownedClone, pObjNumberMap))
- return 0;
- return dwNewObjNum;
+ return pNewXObject->GetObjNum();
+}
+
+void CPDF_NPageToOneExporter::FinishPage(
+ CPDF_Dictionary* pCurPageDict,
+ const ByteString& bsContent,
+ XObjectNameNumberMap* pXObjNameNumberMap) {
+ ASSERT(pCurPageDict);
+
+ CPDF_Dictionary* pRes = pCurPageDict->GetDictFor("Resources");
+ if (!pRes)
+ pRes = pCurPageDict->SetNewFor<CPDF_Dictionary>("Resources");
+
+ CPDF_Dictionary* pPageXObject = pRes->GetDictFor("XObject");
+ if (!pPageXObject)
+ pPageXObject = pRes->SetNewFor<CPDF_Dictionary>("XObject");
+
+ for (auto& it : *pXObjNameNumberMap) {
+ pPageXObject->SetNewFor<CPDF_Reference>(it.first, dest(), it.second);
+ }
+
+ auto pDict = pdfium::MakeUnique<CPDF_Dictionary>(dest()->GetByteStringPool());
+ 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());
}
+} // namespace
+
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_ImportPages(FPDF_DOCUMENT dest_doc,
FPDF_DOCUMENT src_doc,
FPDF_BYTESTRING pagerange,
@@ -738,12 +792,8 @@ FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_ImportPages(FPDF_DOCUMENT dest_doc,
if (page_numbers.empty())
return false;
- CPDF_PageOrganizer pageOrg(pDestDoc, pSrcDoc);
-
- if (!pageOrg.PDFDocInit())
- return false;
-
- return pageOrg.ExportPage(page_numbers, index);
+ CPDF_PageExporter exporter(pDestDoc, pSrcDoc);
+ return exporter.ExportPage(page_numbers, index);
}
FPDF_EXPORT FPDF_DOCUMENT FPDF_CALLCONV
@@ -773,13 +823,18 @@ FPDF_ImportNPagesToOne(FPDF_DOCUMENT src_doc,
if (page_numbers.empty())
return nullptr;
- CPDF_PageOrganizer pageOrg(pDestDoc, pSrcDoc);
- if (!pageOrg.PDFDocInit() ||
- !pageOrg.ExportNPagesToOne(page_numbers, output_width, output_height,
- num_pages_on_x_axis, num_pages_on_y_axis)) {
- return nullptr;
+ if (num_pages_on_x_axis == 1 && num_pages_on_y_axis == 1) {
+ CPDF_PageExporter exporter(pDestDoc, pSrcDoc);
+ if (!exporter.ExportPage(page_numbers, 0))
+ return nullptr;
+ return output_doc.release();
}
+ CPDF_NPageToOneExporter exporter(pDestDoc, pSrcDoc);
+ if (!exporter.ExportNPagesToOne(page_numbers, output_width, output_height,
+ num_pages_on_x_axis, num_pages_on_y_axis)) {
+ return nullptr;
+ }
return output_doc.release();
}