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// 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 "public/fpdf_save.h"
#include <memory>
#include <utility>
#include <vector>
#include "core/fpdfapi/edit/cpdf_creator.h"
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_document.h"
#include "core/fpdfapi/parser/cpdf_reference.h"
#include "core/fpdfapi/parser/cpdf_stream_acc.h"
#include "core/fpdfapi/parser/cpdf_string.h"
#include "core/fxcrt/cfx_memorystream.h"
#include "core/fxcrt/fx_extension.h"
#include "fpdfsdk/cpdfsdk_filewriteadapter.h"
#include "fpdfsdk/cpdfsdk_helpers.h"
#include "public/fpdf_edit.h"
#include "third_party/base/optional.h"
#include "third_party/base/ptr_util.h"
#ifdef PDF_ENABLE_XFA
#include "fpdfsdk/fpdfxfa/cpdfxfa_context.h"
#include "fpdfsdk/fpdfxfa/cxfa_fwladaptertimermgr.h"
#include "public/fpdf_formfill.h"
#include "xfa/fxfa/cxfa_eventparam.h"
#include "xfa/fxfa/cxfa_ffapp.h"
#include "xfa/fxfa/cxfa_ffdocview.h"
#include "xfa/fxfa/cxfa_ffwidgethandler.h"
#include "xfa/fxfa/cxfa_readynodeiterator.h"
#include "xfa/fxfa/parser/cxfa_object.h"
#endif
#if _FX_OS_ == _FX_OS_ANDROID_
#include <time.h>
#else
#include <ctime>
#endif
namespace {
#ifdef PDF_ENABLE_XFA
bool SaveXFADocumentData(CPDFXFA_Context* pContext,
std::vector<RetainPtr<IFX_SeekableStream>>* fileList) {
if (!pContext)
return false;
if (!pContext->ContainsXFAForm())
return true;
CXFA_FFDocView* pXFADocView = pContext->GetXFADocView();
if (!pXFADocView)
return true;
CPDF_Document* pPDFDocument = pContext->GetPDFDoc();
if (!pPDFDocument)
return false;
CPDF_Dictionary* pRoot = pPDFDocument->GetRoot();
if (!pRoot)
return false;
CPDF_Dictionary* pAcroForm = pRoot->GetDictFor("AcroForm");
if (!pAcroForm)
return false;
CPDF_Object* pXFA = pAcroForm->GetObjectFor("XFA");
if (!pXFA)
return true;
CPDF_Array* pArray = pXFA->AsArray();
if (!pArray)
return false;
int size = pArray->GetCount();
int iFormIndex = -1;
int iDataSetsIndex = -1;
int iLast = size - 2;
for (int i = 0; i < size - 1; i++) {
const CPDF_Object* pPDFObj = pArray->GetObjectAt(i);
if (!pPDFObj->IsString())
continue;
if (pPDFObj->GetString() == "form")
iFormIndex = i + 1;
else if (pPDFObj->GetString() == "datasets")
iDataSetsIndex = i + 1;
}
CPDF_Stream* pFormStream = nullptr;
if (iFormIndex != -1) {
// Get form CPDF_Stream
CPDF_Object* pFormPDFObj = pArray->GetObjectAt(iFormIndex);
if (pFormPDFObj->IsReference()) {
CPDF_Object* pFormDirectObj = pFormPDFObj->GetDirect();
if (pFormDirectObj && pFormDirectObj->IsStream()) {
pFormStream = pFormDirectObj->AsStream();
}
} else if (pFormPDFObj->IsStream()) {
pFormStream = pFormPDFObj->AsStream();
}
}
CPDF_Stream* pDataSetsStream = nullptr;
if (iDataSetsIndex != -1) {
// Get datasets CPDF_Stream
CPDF_Object* pDataSetsPDFObj = pArray->GetObjectAt(iDataSetsIndex);
if (pDataSetsPDFObj->IsReference()) {
CPDF_Reference* pDataSetsRefObj = pDataSetsPDFObj->AsReference();
CPDF_Object* pDataSetsDirectObj = pDataSetsRefObj->GetDirect();
if (pDataSetsDirectObj && pDataSetsDirectObj->IsStream()) {
pDataSetsStream = pDataSetsDirectObj->AsStream();
}
} else if (pDataSetsPDFObj->IsStream()) {
pDataSetsStream = pDataSetsPDFObj->AsStream();
}
}
// L"datasets"
{
RetainPtr<IFX_SeekableStream> pDsfileWrite =
pdfium::MakeRetain<CFX_MemoryStream>();
CXFA_FFDoc* ffdoc = pXFADocView->GetDoc();
if (ffdoc->SavePackage(
ToNode(ffdoc->GetXFADoc()->GetXFAObject(XFA_HASHCODE_Datasets)),
pDsfileWrite) &&
pDsfileWrite->GetSize() > 0) {
auto pDataDict = pdfium::MakeUnique<CPDF_Dictionary>(
pPDFDocument->GetByteStringPool());
if (iDataSetsIndex != -1) {
if (pDataSetsStream) {
pDataSetsStream->InitStreamFromFile(pDsfileWrite,
std::move(pDataDict));
}
} else {
CPDF_Stream* pData = pPDFDocument->NewIndirect<CPDF_Stream>();
pData->InitStreamFromFile(pDsfileWrite, std::move(pDataDict));
iLast = pArray->GetCount() - 2;
pArray->InsertNewAt<CPDF_String>(iLast, "datasets", false);
pArray->InsertAt(iLast + 1, pData->MakeReference(pPDFDocument));
}
fileList->push_back(std::move(pDsfileWrite));
}
}
// L"form"
{
RetainPtr<IFX_SeekableStream> pfileWrite =
pdfium::MakeRetain<CFX_MemoryStream>();
CXFA_FFDoc* ffdoc = pXFADocView->GetDoc();
if (ffdoc->SavePackage(
ToNode(ffdoc->GetXFADoc()->GetXFAObject(XFA_HASHCODE_Form)),
pfileWrite) &&
pfileWrite->GetSize() > 0) {
auto pDataDict = pdfium::MakeUnique<CPDF_Dictionary>(
pPDFDocument->GetByteStringPool());
if (iFormIndex != -1) {
if (pFormStream)
pFormStream->InitStreamFromFile(pfileWrite, std::move(pDataDict));
} else {
CPDF_Stream* pData = pPDFDocument->NewIndirect<CPDF_Stream>();
pData->InitStreamFromFile(pfileWrite, std::move(pDataDict));
iLast = pArray->GetCount() - 2;
pArray->InsertNewAt<CPDF_String>(iLast, "form", false);
pArray->InsertAt(iLast + 1, pData->MakeReference(pPDFDocument));
}
fileList->push_back(std::move(pfileWrite));
}
}
return true;
}
bool SendPostSaveToXFADoc(CPDFXFA_Context* pContext) {
if (!pContext)
return false;
if (!pContext->ContainsXFAForm())
return true;
CXFA_FFDocView* pXFADocView = pContext->GetXFADocView();
if (!pXFADocView)
return false;
CXFA_FFWidgetHandler* pWidgetHandler = pXFADocView->GetWidgetHandler();
auto it = pXFADocView->CreateReadyNodeIterator();
while (CXFA_Node* pNode = it->MoveToNext()) {
CXFA_EventParam preParam;
preParam.m_eType = XFA_EVENT_PostSave;
pWidgetHandler->ProcessEvent(pNode, &preParam);
}
pXFADocView->UpdateDocView();
pContext->ClearChangeMark();
return true;
}
bool SendPreSaveToXFADoc(CPDFXFA_Context* pContext,
std::vector<RetainPtr<IFX_SeekableStream>>* fileList) {
if (!pContext->ContainsXFAForm())
return true;
CXFA_FFDocView* pXFADocView = pContext->GetXFADocView();
if (!pXFADocView)
return true;
CXFA_FFWidgetHandler* pWidgetHandler = pXFADocView->GetWidgetHandler();
auto it = pXFADocView->CreateReadyNodeIterator();
while (CXFA_Node* pNode = it->MoveToNext()) {
CXFA_EventParam preParam;
preParam.m_eType = XFA_EVENT_PreSave;
pWidgetHandler->ProcessEvent(pNode, &preParam);
}
pXFADocView->UpdateDocView();
return SaveXFADocumentData(pContext, fileList);
}
#endif // PDF_ENABLE_XFA
bool DoDocSave(FPDF_DOCUMENT document,
FPDF_FILEWRITE* pFileWrite,
FPDF_DWORD flags,
Optional<int> version) {
CPDF_Document* pPDFDoc = CPDFDocumentFromFPDFDocument(document);
if (!pPDFDoc)
return 0;
#ifdef PDF_ENABLE_XFA
auto* pContext = static_cast<CPDFXFA_Context*>(pPDFDoc->GetExtension());
if (pContext) {
std::vector<RetainPtr<IFX_SeekableStream>> fileList;
SendPreSaveToXFADoc(pContext, &fileList);
}
#endif // PDF_ENABLE_XFA
if (flags < FPDF_INCREMENTAL || flags > FPDF_REMOVE_SECURITY)
flags = 0;
CPDF_Creator fileMaker(
pPDFDoc, pdfium::MakeRetain<CPDFSDK_FileWriteAdapter>(pFileWrite));
if (version.has_value())
fileMaker.SetFileVersion(version.value());
if (flags == FPDF_REMOVE_SECURITY) {
flags = 0;
fileMaker.RemoveSecurity();
}
bool bRet = fileMaker.Create(flags);
#ifdef PDF_ENABLE_XFA
SendPostSaveToXFADoc(pContext);
#endif // PDF_ENABLE_XFA
return bRet;
}
} // namespace
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_SaveAsCopy(FPDF_DOCUMENT document,
FPDF_FILEWRITE* pFileWrite,
FPDF_DWORD flags) {
return DoDocSave(document, pFileWrite, flags, {});
}
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FPDF_SaveWithVersion(FPDF_DOCUMENT document,
FPDF_FILEWRITE* pFileWrite,
FPDF_DWORD flags,
int fileVersion) {
return DoDocSave(document, pFileWrite, flags, fileVersion);
}
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