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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_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/fsdk_define.h"
#include "fpdfsdk/fsdk_filewriteadapter.h"
#include "public/fpdf_edit.h"
#ifdef PDF_ENABLE_XFA
#include "core/fxcrt/cfx_checksumcontext.h"
#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_widgetacciterator.h"
#endif
#if _FX_OS_ == _FX_ANDROID_
#include <time.h>
#else
#include <ctime>
#endif
namespace {
#ifdef PDF_ENABLE_XFA
bool SaveXFADocumentData(
CPDFXFA_Context* pContext,
std::vector<CFX_RetainPtr<IFX_SeekableStream>>* fileList) {
if (!pContext)
return false;
if (pContext->GetDocType() != XFA_DocType::Dynamic &&
pContext->GetDocType() != XFA_DocType::Static) {
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 iTemplate = -1;
int iLast = size - 2;
for (int i = 0; i < size - 1; i++) {
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;
else if (pPDFObj->GetString() == "template")
iTemplate = i + 1;
}
auto pChecksum = pdfium::MakeUnique<CFX_ChecksumContext>();
pChecksum->StartChecksum();
// template
if (iTemplate > -1) {
CPDF_Stream* pTemplateStream = pArray->GetStreamAt(iTemplate);
auto pAcc = pdfium::MakeRetain<CPDF_StreamAcc>(pTemplateStream);
pAcc->LoadAllData();
CFX_RetainPtr<IFX_SeekableStream> pTemplate =
pdfium::MakeRetain<CFX_MemoryStream>(
const_cast<uint8_t*>(pAcc->GetData()), pAcc->GetSize(), false);
pChecksum->UpdateChecksum(pTemplate);
}
CPDF_Stream* pFormStream = nullptr;
CPDF_Stream* pDataSetsStream = 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 = (CPDF_Stream*)pFormDirectObj;
}
} else if (pFormPDFObj->IsStream()) {
pFormStream = (CPDF_Stream*)pFormPDFObj;
}
}
if (iDataSetsIndex != -1) {
// Get datasets CPDF_Stream
CPDF_Object* pDataSetsPDFObj = pArray->GetObjectAt(iDataSetsIndex);
if (pDataSetsPDFObj->IsReference()) {
CPDF_Reference* pDataSetsRefObj = (CPDF_Reference*)pDataSetsPDFObj;
CPDF_Object* pDataSetsDirectObj = pDataSetsRefObj->GetDirect();
if (pDataSetsDirectObj && pDataSetsDirectObj->IsStream()) {
pDataSetsStream = (CPDF_Stream*)pDataSetsDirectObj;
}
} else if (pDataSetsPDFObj->IsStream()) {
pDataSetsStream = (CPDF_Stream*)pDataSetsPDFObj;
}
}
// L"datasets"
{
CFX_RetainPtr<IFX_SeekableStream> pDsfileWrite =
pdfium::MakeRetain<CFX_MemoryStream>(false);
if (pXFADocView->GetDoc()->SavePackage(XFA_HASHCODE_Datasets, pDsfileWrite,
nullptr) &&
pDsfileWrite->GetSize() > 0) {
// Datasets
pChecksum->UpdateChecksum(pDsfileWrite);
pChecksum->FinishChecksum();
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->InsertNewAt<CPDF_Reference>(iLast + 1, pPDFDocument,
pData->GetObjNum());
}
fileList->push_back(std::move(pDsfileWrite));
}
}
// L"form"
{
CFX_RetainPtr<IFX_SeekableStream> pfileWrite =
pdfium::MakeRetain<CFX_MemoryStream>(false);
if (pXFADocView->GetDoc()->SavePackage(XFA_HASHCODE_Form, pfileWrite,
pChecksum.get()) &&
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->InsertNewAt<CPDF_Reference>(iLast + 1, pPDFDocument,
pData->GetObjNum());
}
fileList->push_back(std::move(pfileWrite));
}
}
return true;
}
bool SendPostSaveToXFADoc(CPDFXFA_Context* pContext) {
if (!pContext)
return false;
if (pContext->GetDocType() != XFA_DocType::Dynamic &&
pContext->GetDocType() != XFA_DocType::Static)
return true;
CXFA_FFDocView* pXFADocView = pContext->GetXFADocView();
if (!pXFADocView)
return false;
CXFA_FFWidgetHandler* pWidgetHander = pXFADocView->GetWidgetHandler();
std::unique_ptr<CXFA_WidgetAccIterator> pWidgetAccIterator =
pXFADocView->CreateWidgetAccIterator();
while (CXFA_WidgetAcc* pWidgetAcc = pWidgetAccIterator->MoveToNext()) {
CXFA_EventParam preParam;
preParam.m_eType = XFA_EVENT_PostSave;
pWidgetHander->ProcessEvent(pWidgetAcc, &preParam);
}
pXFADocView->UpdateDocView();
pContext->ClearChangeMark();
return true;
}
bool SendPreSaveToXFADoc(
CPDFXFA_Context* pContext,
std::vector<CFX_RetainPtr<IFX_SeekableStream>>* fileList) {
if (pContext->GetDocType() != XFA_DocType::Dynamic &&
pContext->GetDocType() != XFA_DocType::Static)
return true;
CXFA_FFDocView* pXFADocView = pContext->GetXFADocView();
if (!pXFADocView)
return true;
CXFA_FFWidgetHandler* pWidgetHander = pXFADocView->GetWidgetHandler();
std::unique_ptr<CXFA_WidgetAccIterator> pWidgetAccIterator =
pXFADocView->CreateWidgetAccIterator();
while (CXFA_WidgetAcc* pWidgetAcc = pWidgetAccIterator->MoveToNext()) {
CXFA_EventParam preParam;
preParam.m_eType = XFA_EVENT_PreSave;
pWidgetHander->ProcessEvent(pWidgetAcc, &preParam);
}
pXFADocView->UpdateDocView();
return SaveXFADocumentData(pContext, fileList);
}
#endif // PDF_ENABLE_XFA
bool FPDF_Doc_Save(FPDF_DOCUMENT document,
FPDF_FILEWRITE* pFileWrite,
FPDF_DWORD flags,
FPDF_BOOL bSetVersion,
int fileVerion) {
CPDF_Document* pPDFDoc = CPDFDocumentFromFPDFDocument(document);
if (!pPDFDoc)
return 0;
#ifdef PDF_ENABLE_XFA
CPDFXFA_Context* pContext = static_cast<CPDFXFA_Context*>(document);
std::vector<CFX_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<FSDK_FileWriteAdapter>(pFileWrite));
if (bSetVersion)
fileMaker.SetFileVersion(fileVerion);
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
DLLEXPORT FPDF_BOOL STDCALL FPDF_SaveAsCopy(FPDF_DOCUMENT document,
FPDF_FILEWRITE* pFileWrite,
FPDF_DWORD flags) {
return FPDF_Doc_Save(document, pFileWrite, flags, false, 0);
}
DLLEXPORT FPDF_BOOL STDCALL FPDF_SaveWithVersion(FPDF_DOCUMENT document,
FPDF_FILEWRITE* pFileWrite,
FPDF_DWORD flags,
int fileVersion) {
return FPDF_Doc_Save(document, pFileWrite, flags, true, fileVersion);
}