// 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 <vector> #include "core/fpdfapi/fpdf_edit/cpdf_creator.h" #include "core/fpdfapi/fpdf_parser/cpdf_array.h" #include "core/fpdfapi/fpdf_parser/cpdf_document.h" #include "core/fpdfapi/fpdf_parser/cpdf_reference.h" #include "core/fpdfapi/fpdf_parser/cpdf_stream_acc.h" #include "core/fpdfapi/fpdf_parser/cpdf_string.h" #include "core/fxcrt/fx_ext.h" #include "fpdfsdk/fsdk_define.h" #include "public/fpdf_edit.h" #ifdef PDF_ENABLE_XFA #include "fpdfsdk/fpdfxfa/fpdfxfa_app.h" #include "fpdfsdk/fpdfxfa/fpdfxfa_doc.h" #include "fpdfsdk/fpdfxfa/fpdfxfa_util.h" #include "public/fpdf_formfill.h" #include "xfa/fxfa/cxfa_eventparam.h" #include "xfa/fxfa/xfa_checksum.h" #include "xfa/fxfa/xfa_ffapp.h" #include "xfa/fxfa/xfa_ffdocview.h" #include "xfa/fxfa/xfa_ffwidgethandler.h" #endif #if _FX_OS_ == _FX_ANDROID_ #include "time.h" #else #include <ctime> #endif class CFX_IFileWrite final : public IFX_StreamWrite { public: CFX_IFileWrite(); FX_BOOL Init(FPDF_FILEWRITE* pFileWriteStruct); FX_BOOL WriteBlock(const void* pData, size_t size) override; void Release() override; protected: ~CFX_IFileWrite() override {} FPDF_FILEWRITE* m_pFileWriteStruct; }; CFX_IFileWrite::CFX_IFileWrite() { m_pFileWriteStruct = nullptr; } FX_BOOL CFX_IFileWrite::Init(FPDF_FILEWRITE* pFileWriteStruct) { if (!pFileWriteStruct) return FALSE; m_pFileWriteStruct = pFileWriteStruct; return TRUE; } FX_BOOL CFX_IFileWrite::WriteBlock(const void* pData, size_t size) { if (!m_pFileWriteStruct) return FALSE; m_pFileWriteStruct->WriteBlock(m_pFileWriteStruct, pData, size); return TRUE; } void CFX_IFileWrite::Release() { delete this; } namespace { #ifdef PDF_ENABLE_XFA bool SaveXFADocumentData(CPDFXFA_Document* pDocument, std::vector<ScopedFileStream>* fileList) { if (!pDocument) return false; if (pDocument->GetDocType() != DOCTYPE_DYNAMIC_XFA && pDocument->GetDocType() != DOCTYPE_STATIC_XFA) return true; if (!CPDFXFA_App::GetInstance()->GetXFAApp()) return true; CXFA_FFDocView* pXFADocView = pDocument->GetXFADocView(); if (!pXFADocView) return true; CPDF_Document* pPDFDocument = pDocument->GetPDFDoc(); if (!pDocument) 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; } std::unique_ptr<CXFA_ChecksumContext> pContext(new CXFA_ChecksumContext); pContext->StartChecksum(); // template if (iTemplate > -1) { CPDF_Stream* pTemplateStream = pArray->GetStreamAt(iTemplate); CPDF_StreamAcc streamAcc; streamAcc.LoadAllData(pTemplateStream); uint8_t* pData = (uint8_t*)streamAcc.GetData(); uint32_t dwSize2 = streamAcc.GetSize(); ScopedFileStream pTemplate(FX_CreateMemoryStream(pData, dwSize2)); pContext->UpdateChecksum(pTemplate.get()); } 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" { ScopedFileStream pDsfileWrite(FX_CreateMemoryStream()); if (pXFADocView->GetDoc()->SavePackage(XFA_HASHCODE_Datasets, pDsfileWrite.get(), nullptr) && pDsfileWrite->GetSize() > 0) { // Datasets pContext->UpdateChecksum(pDsfileWrite.get()); pContext->FinishChecksum(); CPDF_Dictionary* pDataDict = new CPDF_Dictionary(pPDFDocument->GetByteStringPool()); if (iDataSetsIndex != -1) { if (pDataSetsStream) pDataSetsStream->InitStreamFromFile(pDsfileWrite.get(), pDataDict); } else { CPDF_Stream* pData = new CPDF_Stream; pData->InitStreamFromFile(pDsfileWrite.get(), pDataDict); iLast = pArray->GetCount() - 2; pArray->InsertAt(iLast, new CPDF_String("datasets", FALSE)); pArray->InsertAt( iLast + 1, new CPDF_Reference(pPDFDocument, pPDFDocument->AddIndirectObject(pData))); } fileList->push_back(std::move(pDsfileWrite)); } } // L"form" { ScopedFileStream pfileWrite(FX_CreateMemoryStream()); if (pXFADocView->GetDoc()->SavePackage(XFA_HASHCODE_Form, pfileWrite.get(), pContext.get()) && pfileWrite->GetSize() > 0) { CPDF_Dictionary* pDataDict = new CPDF_Dictionary(pPDFDocument->GetByteStringPool()); if (iFormIndex != -1) { if (pFormStream) pFormStream->InitStreamFromFile(pfileWrite.get(), pDataDict); } else { CPDF_Stream* pData = new CPDF_Stream; pData->InitStreamFromFile(pfileWrite.get(), pDataDict); iLast = pArray->GetCount() - 2; pArray->InsertAt(iLast, new CPDF_String("form", FALSE)); pArray->InsertAt( iLast + 1, new CPDF_Reference(pPDFDocument, pPDFDocument->AddIndirectObject(pData))); } fileList->push_back(std::move(pfileWrite)); } } return true; } bool SendPostSaveToXFADoc(CPDFXFA_Document* pDocument) { if (!pDocument) return false; if (pDocument->GetDocType() != DOCTYPE_DYNAMIC_XFA && pDocument->GetDocType() != DOCTYPE_STATIC_XFA) return true; CXFA_FFDocView* pXFADocView = pDocument->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(); pDocument->ClearChangeMark(); return true; } bool SendPreSaveToXFADoc(CPDFXFA_Document* pDocument, std::vector<ScopedFileStream>* fileList) { if (pDocument->GetDocType() != DOCTYPE_DYNAMIC_XFA && pDocument->GetDocType() != DOCTYPE_STATIC_XFA) return true; CXFA_FFDocView* pXFADocView = pDocument->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(pDocument, 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_Document* pDoc = static_cast<CPDFXFA_Document*>(document); std::vector<ScopedFileStream> fileList; SendPreSaveToXFADoc(pDoc, &fileList); #endif // PDF_ENABLE_XFA if (flags < FPDF_INCREMENTAL || flags > FPDF_REMOVE_SECURITY) flags = 0; CPDF_Creator FileMaker(pPDFDoc); if (bSetVersion) FileMaker.SetFileVersion(fileVerion); if (flags == FPDF_REMOVE_SECURITY) { flags = 0; FileMaker.RemoveSecurity(); } CFX_IFileWrite* pStreamWrite = new CFX_IFileWrite; pStreamWrite->Init(pFileWrite); bool bRet = FileMaker.Create(pStreamWrite, flags); #ifdef PDF_ENABLE_XFA SendPostSaveToXFADoc(pDoc); #endif // PDF_ENABLE_XFA pStreamWrite->Release(); 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); }